Initial commit

app/.gitignore

@@ -0,0 +1 @@
+/build

app/build.gradle

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+apply plugin: 'com.android.application'
+
+android {
+    compileSdkVersion 25
+    buildToolsVersion "25"
+    defaultConfig {
+        applicationId "om.sstvencoder"
+        minSdkVersion 15
+        targetSdkVersion 25
+        versionCode 21
+        versionName "2.0"
+    }
+    buildTypes {
+        release {
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
+        }
+    }
+}
+
+dependencies {
+    compile fileTree(dir: 'libs', include: ['*.jar'])
+    compile 'com.android.support:appcompat-v7:25.0.0'
+}

app/proguard-rules.pro

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+# Add project specific ProGuard rules here.
+# By default, the flags in this file are appended to flags specified
+# in /home/olga/Android/Sdk/tools/proguard/proguard-android.txt
+# You can edit the include path and order by changing the proguardFiles
+# directive in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# Add any project specific keep options here:
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+#   public *;
+#}

app/src/main/AndroidManifest.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+          package="om.sstvencoder">
+
+    <uses-permission
+        android:name="android.permission.WRITE_EXTERNAL_STORAGE"
+        android:maxSdkVersion="18"/>
+    <uses-feature
+        android:name="android.hardware.camera"
+        android:required="false"/>
+    <application
+        android:allowBackup="false"
+        android:icon="@mipmap/ic_launcher"
+        android:label="@string/app_name"
+        android:theme="@style/AppTheme">
+        <provider
+            android:name="android.support.v4.content.FileProvider"
+            android:authorities="om.sstvencoder"
+            android:exported="false"
+            android:grantUriPermissions="true">
+            <meta-data
+                android:name="android.support.FILE_PROVIDER_PATHS"
+                android:resource="@xml/paths"/>
+        </provider>
+
+        <activity
+            android:name=".MainActivity"
+            android:configChanges="keyboardHidden|orientation|screenSize"
+            android:label="@string/app_name"
+            android:launchMode="singleTask">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN"/>
+                <category android:name="android.intent.category.LAUNCHER"/>
+            </intent-filter>
+            <intent-filter>
+                <action android:name="android.intent.action.SEND"/>
+                <category android:name="android.intent.category.DEFAULT"/>
+                <data android:mimeType="image/*"/>
+            </intent-filter>
+        </activity>
+
+        <activity android:name=".EditTextActivity"/>
+
+    </application>
+</manifest>

app/src/main/java/om/sstvencoder/ColorPalette/ColorPaletteView.java

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+/*
+Copyright 2017 Olga Miller <olga.rgb@gmail.com>
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+package om.sstvencoder.ColorPalette;
+
+import android.content.Context;
+import android.graphics.Canvas;
+import android.graphics.Color;
+import android.graphics.PorterDuff;
+import android.support.annotation.NonNull;
+import android.util.AttributeSet;
+import android.view.MotionEvent;
+import android.view.View;
+
+import java.util.ArrayList;
+
+public class ColorPaletteView extends View {
+
+    public interface OnChangeListener {
+        void onChange(View v, int color);
+    }
+
+    private final ArrayList<OnChangeListener> mListeners;
+    private final IColorPalette mPalette;
+
+    public ColorPaletteView(Context context, AttributeSet attrs) {
+        super(context, attrs);
+        mListeners = new ArrayList<>();
+        mPalette = new GridColorPalette(GridColorPalette.getStandardColors(),
+                getResources().getDisplayMetrics().density);
+    }
+
+    public int getColor() {
+        return mPalette.getSelectedColor();
+    }
+
+    public void setColor(int color) {
+        mPalette.selectColor(color);
+    }
+
+    @Override
+    protected void onSizeChanged(int w, int h, int old_w, int old_h) {
+        super.onSizeChanged(w, h, old_w, old_h);
+        mPalette.updateSize(w, h);
+    }
+
+    @Override
+    protected void onDraw(@NonNull Canvas canvas) {
+        canvas.drawColor(Color.TRANSPARENT, PorterDuff.Mode.CLEAR);
+        mPalette.draw(canvas);
+    }
+
+    @Override
+    public boolean onTouchEvent(@NonNull MotionEvent e) {
+        boolean consumed = false;
+        switch (e.getAction()) {
+            case MotionEvent.ACTION_DOWN:
+            case MotionEvent.ACTION_MOVE: {
+                update(e.getX(), e.getY());
+                consumed = true;
+                break;
+            }
+        }
+        return consumed || super.onTouchEvent(e);
+    }
+
+    private void update(float x, float y) {
+        if (mPalette.selectColor(x, y)) {
+            invalidate();
+            callback();
+        }
+    }
+
+    public void setOnChangeListener(OnChangeListener listener) {
+        mListeners.add(listener);
+    }
+
+    private void callback() {
+        for (OnChangeListener listener : mListeners) {
+            listener.onChange(this, mPalette.getSelectedColor());
+        }
+    }
+}
+

app/src/main/java/om/sstvencoder/ColorPalette/GridColorPalette.java

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+/*
+Copyright 2017 Olga Miller <olga.rgb@gmail.com>
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+package om.sstvencoder.ColorPalette;
+
+import android.graphics.Canvas;
+import android.graphics.Color;
+import android.graphics.Paint;
+import android.graphics.RectF;
+
+class GridColorPalette implements IColorPalette {
+
+    static int[] getStandardColors() {
+        return new int[]{
+                Color.BLACK,
+                Color.GRAY,
+                Color.LTGRAY,
+                Color.WHITE,
+                Color.YELLOW,
+                Color.CYAN,
+                Color.GREEN,
+                Color.MAGENTA,
+                Color.RED,
+                Color.BLUE
+        };
+    }
+
+    private final static float STROKE_WIDTH_FACTOR = 6f;
+    private final static float BOX_SIZE_DP = 96f;
+    private final static float SPACE_FACTOR = 6f;
+    private final static float CORNER_RADIUS = 6f;
+    private final int[] mColorList;
+    private final Paint mPaint;
+    private final RectF mSelectedBounds;
+    private final float mDisplayMetricsDensity;
+    private int mColumns, mRows;
+    private float mWidth, mHeight;
+    private float mBoxSize, mSpace, mStrokeWidth;
+    private int mSelectedColorIndex;
+    private boolean mValid;
+
+    GridColorPalette(int[] colorList, float displayMetricsDensity) {
+        mColorList = colorList;
+        mDisplayMetricsDensity = displayMetricsDensity;
+        mPaint = new Paint();
+        setPaintStyleForBox();
+        mSelectedBounds = new RectF();
+        mSelectedColorIndex = 0;
+        mValid = false;
+    }
+
+    @Override
+    public void updateSize(float width, float height) {
+        mValid = width > 0 && height > 0;
+
+        if (mValid && (mWidth != width || mHeight != height)) {
+            mWidth = width;
+            mHeight = height;
+            updateGrid();
+            mStrokeWidth = mSpace / STROKE_WIDTH_FACTOR;
+            setSelectedColor(mSelectedColorIndex);
+        }
+    }
+
+    // The approximately same box size independently on resolution has the higher priority.
+    // Thus the possible filling of the last row is not supported here.
+    private void updateGrid() {
+        int boxes = mColorList.length;
+        mBoxSize = BOX_SIZE_DP * mDisplayMetricsDensity;
+        mSpace = mBoxSize / SPACE_FACTOR;
+
+        mColumns = min((int) ((mWidth - mSpace) / (mBoxSize + mSpace) + 0.5f), boxes);
+        mRows = (boxes + mColumns - 1) / mColumns; // ceil
+        updateBoxSizeAndSpace();
+
+        while (mRows * (mBoxSize + mSpace) + mSpace > mHeight) {
+            ++mColumns;
+            mRows = (boxes + mColumns - 1) / mColumns;
+            updateBoxSizeAndSpace();
+        }
+    }
+
+    private int min(int a, int b) {
+        return a <= b ? a : b;
+    }
+
+    // Fill out the whole width of the View.
+    private void updateBoxSizeAndSpace() {
+        // Set 'space = boxSize / spaceFactor' into
+        // 'boxSize = (width - (columns + 1) * space ) / columns'
+        // and solve for boxSize:
+        mBoxSize = SPACE_FACTOR * mWidth / (1f + mColumns * (SPACE_FACTOR + 1f));
+        mSpace = mBoxSize / SPACE_FACTOR;
+    }
+
+    @Override
+    public void draw(Canvas canvas) {
+        if (!mValid)
+            return;
+
+        float x = mSpace, y = mSpace;
+        float maxX = mColumns * (mBoxSize + mSpace);
+        for (int color : mColorList) {
+            RectF rect = new RectF(x, y, x + mBoxSize, y + mBoxSize);
+            mPaint.setColor(color);
+            canvas.drawRoundRect(rect, CORNER_RADIUS, CORNER_RADIUS, mPaint);
+            x += mBoxSize + mSpace;
+            if (x > maxX) {
+                x = mSpace;
+                y += mBoxSize + mSpace;
+            }
+        }
+        drawSelectedRect(canvas);
+    }
+
+    private void drawSelectedRect(Canvas canvas) {
+        float padding = mSpace / 2f;
+        float l = mSelectedBounds.left;
+        float t = mSelectedBounds.top;
+        float r = mSelectedBounds.right;
+        float b = mSelectedBounds.bottom;
+        RectF rect = new RectF(l - padding, t - padding, r + padding, b + padding);
+        Paint.Style paintStyle = mPaint.getStyle();
+        setPaintStyleForSelectedBox();
+        canvas.drawRoundRect(rect, CORNER_RADIUS, CORNER_RADIUS, mPaint);
+        mPaint.setStyle(paintStyle);
+    }
+
+    private void setPaintStyleForSelectedBox() {
+        mPaint.setStyle(Paint.Style.STROKE);
+        mPaint.setStrokeWidth(mStrokeWidth);
+        mPaint.setColor(Color.WHITE);
+    }
+
+    private void setPaintStyleForBox() {
+        mPaint.setStyle(Paint.Style.FILL);
+        mPaint.setAntiAlias(true);
+    }
+
+    @Override
+    public int getSelectedColor() {
+        return mColorList[mSelectedColorIndex];
+    }
+
+    @Override
+    public boolean selectColor(float x, float y) {
+        if (!mValid || mSelectedBounds.contains(x, y))
+            return false;
+
+        int column = (int) (x / (mBoxSize + mSpace));
+        int row = (int) (y / (mBoxSize + mSpace));
+        if (0 > row || row >= mRows || 0 > column && column >= mColumns)
+            return false;
+
+        int i = row * mColumns + column;
+        if (i >= mColorList.length || i == mSelectedColorIndex)
+            return false;
+
+        float left = mSpace + column * (mBoxSize + mSpace);
+        float top = mSpace + row * (mBoxSize + mSpace);
+        if (left > x || x > left + mBoxSize || top > y || y > top + mBoxSize)
+            return false;
+
+        mSelectedBounds.set(left, top, left + mBoxSize, top + mBoxSize);
+        mSelectedColorIndex = i;
+        return true;
+    }
+
+    @Override
+    public boolean selectColor(int color) {
+        for (int i = 0; i < mColorList.length; ++i) {
+            if (color == mColorList[i]) {
+                if (mValid)
+                    setSelectedColor(i);
+                else
+                    mSelectedColorIndex = i;
+                return true;
+            }
+        }
+        return false;
+    }
+
+    private void setSelectedColor(int i) {
+        int row = i / mColumns;
+        int column = i - row * mColumns;
+        float x = mSpace + column * (mBoxSize + mSpace);
+        float y = mSpace + row * (mBoxSize + mSpace);
+        mSelectedBounds.set(x, y, x + mBoxSize, y + mBoxSize);
+        mSelectedColorIndex = i;
+    }
+}

app/src/main/java/om/sstvencoder/ColorPalette/IColorPalette.java

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+/*
+Copyright 2017 Olga Miller <olga.rgb@gmail.com>
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+package om.sstvencoder.ColorPalette;
+
+import android.graphics.Canvas;
+
+interface IColorPalette {
+    void updateSize(float width, float height);
+
+    void draw(Canvas canvas);
+
+    int getSelectedColor();
+
+    boolean selectColor(float x, float y);
+
+    boolean selectColor(int color);
+}

app/src/main/java/om/sstvencoder/CropView.java

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+/*
+Copyright 2017 Olga Miller <olga.rgb@gmail.com>
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+package om.sstvencoder;
+
+import android.content.Context;
+import android.graphics.Bitmap;
+import android.graphics.BitmapFactory;
+import android.graphics.BitmapRegionDecoder;
+import android.graphics.Canvas;
+import android.graphics.Color;
+import android.graphics.Paint;
+import android.graphics.Rect;
+import android.graphics.RectF;
+import android.support.annotation.NonNull;
+import android.support.v4.view.GestureDetectorCompat;
+import android.util.AttributeSet;
+import android.view.GestureDetector;
+import android.view.MotionEvent;
+import android.view.ScaleGestureDetector;
+import android.widget.ImageView;
+
+import java.io.BufferedInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+
+import om.sstvencoder.ModeInterfaces.ModeSize;
+import om.sstvencoder.TextOverlay.Label;
+import om.sstvencoder.TextOverlay.LabelCollection;
+
+public class CropView extends ImageView {
+    private class GestureListener extends GestureDetector.SimpleOnGestureListener {
+        @Override
+        public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) {
+            if (!mLongPress) {
+                moveImage(distanceX, distanceY);
+                return true;
+            }
+            return false;
+        }
+
+        @Override
+        public void onLongPress(MotionEvent e) {
+            mLongPress = false;
+            if (!mInScale && mLabelCollection.moveLabelBegin(e.getX(), e.getY())) {
+                invalidate();
+                mLongPress = true;
+            }
+        }
+
+        @Override
+        public boolean onSingleTapConfirmed(MotionEvent e) {
+            if (!mLongPress) {
+                editLabelBegin(e.getX(), e.getY());
+                return true;
+            }
+            return false;
+        }
+    }
+
+    private class ScaleGestureListener extends ScaleGestureDetector.SimpleOnScaleGestureListener {
+        @Override
+        public boolean onScaleBegin(ScaleGestureDetector detector) {
+            if (!mLongPress) {
+                mInScale = true;
+                return true;
+            }
+            return false;
+        }
+
+        @Override
+        public boolean onScale(ScaleGestureDetector detector) {
+            scaleImage(detector.getScaleFactor());
+            return true;
+        }
+
+        @Override
+        public void onScaleEnd(ScaleGestureDetector detector) {
+            mInScale = false;
+        }
+    }
+
+    private GestureDetectorCompat mDetectorCompat;
+    private ScaleGestureDetector mScaleDetector;
+    private boolean mLongPress, mInScale;
+    private ModeSize mModeSize;
+    private final Paint mPaint, mRectPaint, mBorderPaint;
+    private RectF mInputRect;
+    private Rect mOutputRect;
+    private BitmapRegionDecoder mRegionDecoder;
+    private int mImageWidth, mImageHeight;
+    private Bitmap mCacheBitmap;
+    private boolean mSmallImage;
+    private boolean mImageOK;
+    private final Rect mCanvasDrawRect, mImageDrawRect;
+    private int mOrientation;
+    private Rect mCacheRect;
+    private int mCacheSampleSize;
+    private final BitmapFactory.Options mBitmapOptions;
+    private LabelCollection mLabelCollection;
+
+    public CropView(Context context, AttributeSet attrs) {
+        super(context, attrs);
+        mDetectorCompat = new GestureDetectorCompat(getContext(), new GestureListener());
+        mScaleDetector = new ScaleGestureDetector(getContext(), new ScaleGestureListener());
+
+        mBitmapOptions = new BitmapFactory.Options();
+
+        mPaint = new Paint(Paint.FILTER_BITMAP_FLAG);
+        mRectPaint = new Paint();
+        mRectPaint.setStyle(Paint.Style.STROKE);
+        mRectPaint.setStrokeWidth(2);
+        mBorderPaint = new Paint();
+        mBorderPaint.setColor(Color.BLACK);
+
+        mCanvasDrawRect = new Rect();
+        mImageDrawRect = new Rect();
+        mCacheRect = new Rect();
+        mOutputRect = new Rect();
+
+        mSmallImage = false;
+        mImageOK = false;
+
+        mLabelCollection = new LabelCollection();
+    }
+
+    public void setModeSize(ModeSize size) {
+        mModeSize = size;
+        mOutputRect = Utility.getEmbeddedRect(getWidth(), getHeight(), mModeSize.width(), mModeSize.height());
+        if (mImageOK) {
+            resetInputRect();
+            invalidate();
+        }
+    }
+
+    private void resetInputRect() {
+        float iw = mModeSize.width();
+        float ih = mModeSize.height();
+        float ow = mImageWidth;
+        float oh = mImageHeight;
+        if (iw * oh > ow * ih) {
+            mInputRect = new RectF(0.0f, 0.0f, (iw * oh) / ih, oh);
+            mInputRect.offset((ow - (iw * oh) / ih) / 2.0f, 0.0f);
+        } else {
+            mInputRect = new RectF(0.0f, 0.0f, ow, (ih * ow) / iw);
+            mInputRect.offset(0.0f, (oh - (ih * ow) / iw) / 2.0f);
+        }
+    }
+
+    public void rotateImage(int orientation) {
+        mOrientation += orientation;
+        mOrientation %= 360;
+        if (orientation == 90 || orientation == 270) {
+            int tmp = mImageWidth;
+            mImageWidth = mImageHeight;
+            mImageHeight = tmp;
+        }
+        if (mImageOK) {
+            resetInputRect();
+            invalidate();
+        }
+    }
+
+    public void setNoBitmap() {
+        mImageOK = false;
+        mOrientation = 0;
+        recycle();
+
+        invalidate();
+    }
+
+    public void setBitmapStream(InputStream stream) throws IOException {
+        mImageOK = false;
+        mOrientation = 0;
+        recycle();
+
+        // app6 + exif
+        int bufferBytes = 1048576;
+        if (!stream.markSupported())
+            stream = new BufferedInputStream(stream, bufferBytes);
+        stream.mark(bufferBytes);
+        BitmapFactory.Options options = new BitmapFactory.Options();
+        options.inJustDecodeBounds = true;
+        BitmapFactory.decodeStream(new BufferedInputStream(stream), null, options);
+        stream.reset();
+        mImageWidth = options.outWidth;
+        mImageHeight = options.outHeight;
+
+        if (mImageWidth * mImageHeight < 1024 * 1024) {
+            mCacheBitmap = BitmapFactory.decodeStream(stream);
+            mSmallImage = true;
+        } else {
+            mRegionDecoder = BitmapRegionDecoder.newInstance(stream, true);
+            mCacheRect.setEmpty();
+            mSmallImage = false;
+        }
+
+        if (mCacheBitmap == null && mRegionDecoder == null) {
+            String size = options.outWidth + "x" + options.outHeight;
+            throw new IOException("Stream could not be decoded. Image size: " + size);
+        }
+
+        mImageOK = true;
+        resetInputRect();
+        invalidate();
+    }
+
+    private void recycle() {
+        if (mRegionDecoder != null) {
+            mRegionDecoder.recycle();
+            mRegionDecoder = null;
+        }
+        if (mCacheBitmap != null) {
+            mCacheBitmap.recycle();
+            mCacheBitmap = null;
+        }
+    }
+
+    public void scaleImage(float scaleFactor) {
+        if (!mImageOK)
+            return;
+        float newW = mInputRect.width() / scaleFactor;
+        float newH = mInputRect.height() / scaleFactor;
+        float dx = 0.5f * (mInputRect.width() - newW);
+        float dy = 0.5f * (mInputRect.height() - newH);
+        float max = 2.0f * Math.max(mImageWidth, mImageHeight);
+        if (Math.min(newW, newH) >= 4.0f && Math.max(newW, newH) <= max) {
+            mInputRect.inset(dx, dy);
+            invalidate();
+        }
+    }
+
+    public void moveImage(float distanceX, float distanceY) {
+        if (!mImageOK)
+            return;
+        float dx = (mInputRect.width() * distanceX) / mOutputRect.width();
+        float dy = (mInputRect.height() * distanceY) / mOutputRect.height();
+        dx = Math.max(mInputRect.width() * 0.1f, mInputRect.right + dx) - mInputRect.right;
+        dy = Math.max(mInputRect.height() * 0.1f, mInputRect.bottom + dy) - mInputRect.bottom;
+        dx = Math.min(mImageWidth - mInputRect.width() * 0.1f, mInputRect.left + dx) - mInputRect.left;
+        dy = Math.min(mImageHeight - mInputRect.height() * 0.1f, mInputRect.top + dy) - mInputRect.top;
+        mInputRect.offset(dx, dy);
+        invalidate();
+    }
+
+    @Override
+    public boolean onTouchEvent(@NonNull MotionEvent e) {
+        boolean consumed = false;
+        if (mLongPress) {
+            switch (e.getAction()) {
+                case MotionEvent.ACTION_MOVE:
+                    mLabelCollection.moveLabel(e.getX(), e.getY());
+                    invalidate();
+                    consumed = true;
+                    break;
+                case MotionEvent.ACTION_UP:
+                case MotionEvent.ACTION_CANCEL:
+                    mLabelCollection.moveLabelEnd();
+                    invalidate();
+                    mLongPress = false;
+                    consumed = true;
+                    break;
+            }
+        }
+        consumed = mScaleDetector.onTouchEvent(e) || consumed;
+        return mDetectorCompat.onTouchEvent(e) || consumed || super.onTouchEvent(e);
+    }
+
+    @Override
+    protected void onSizeChanged(int w, int h, int old_w, int old_h) {
+        super.onSizeChanged(w, h, old_w, old_h);
+        if (mModeSize != null)
+            mOutputRect = Utility.getEmbeddedRect(w, h, mModeSize.width(), mModeSize.height());
+        mLabelCollection.update(w, h);
+    }
+
+    @Override
+    protected void onDraw(@NonNull Canvas canvas) {
+        if (mImageOK) {
+            maximizeImageToCanvasRect();
+            adjustCanvasAndImageRect(getWidth(), getHeight());
+            canvas.drawRect(mOutputRect, mBorderPaint);
+            drawBitmap(canvas);
+        }
+        mLabelCollection.draw(canvas);
+        drawModeRect(canvas);
+    }
+
+    private void maximizeImageToCanvasRect() {
+        mImageDrawRect.left = Math.round(mInputRect.left - mOutputRect.left * mInputRect.width() / mOutputRect.width());
+        mImageDrawRect.top = Math.round(mInputRect.top - mOutputRect.top * mInputRect.height() / mOutputRect.height());
+        mImageDrawRect.right = Math.round(mInputRect.right - (mOutputRect.right - getWidth()) * mInputRect.width() / mOutputRect.width());
+        mImageDrawRect.bottom = Math.round(mInputRect.bottom - (mOutputRect.bottom - getHeight()) * mInputRect.height() / mOutputRect.height());
+    }
+
+    private void adjustCanvasAndImageRect(int width, int height) {
+        mCanvasDrawRect.set(0, 0, width, height);
+        if (mImageDrawRect.left < 0) {
+            mCanvasDrawRect.left -= (mImageDrawRect.left * mCanvasDrawRect.width()) / mImageDrawRect.width();
+            mImageDrawRect.left = 0;
+        }
+        if (mImageDrawRect.top < 0) {
+            mCanvasDrawRect.top -= (mImageDrawRect.top * mCanvasDrawRect.height()) / mImageDrawRect.height();
+            mImageDrawRect.top = 0;
+        }
+        if (mImageDrawRect.right > mImageWidth) {
+            mCanvasDrawRect.right -= ((mImageDrawRect.right - mImageWidth) * mCanvasDrawRect.width()) / mImageDrawRect.width();
+            mImageDrawRect.right = mImageWidth;
+        }
+        if (mImageDrawRect.bottom > mImageHeight) {
+            mCanvasDrawRect.bottom -= ((mImageDrawRect.bottom - mImageHeight) * mCanvasDrawRect.height()) / mImageDrawRect.height();
+            mImageDrawRect.bottom = mImageHeight;
+        }
+    }
+
+    private void drawModeRect(Canvas canvas) {
+        mRectPaint.setColor(Color.BLUE);
+        canvas.drawRect(mOutputRect, mRectPaint);
+        mRectPaint.setColor(Color.GREEN);
+        drawRectInset(canvas, mOutputRect, -2);
+        mRectPaint.setColor(Color.RED);
+        drawRectInset(canvas, mOutputRect, -4);
+    }
+
+    private void drawRectInset(Canvas canvas, Rect rect, int inset) {
+        canvas.drawRect(rect.left + inset, rect.top + inset, rect.right - inset, rect.bottom - inset, mRectPaint);
+    }
+
+    private Rect getIntRect(RectF rect) {
+        return new Rect(Math.round(rect.left), Math.round(rect.top), Math.round(rect.right), Math.round(rect.bottom));
+    }
+
+    private int getSampleSize() {
+        int sx = Math.round(mInputRect.width() / mModeSize.width());
+        int sy = Math.round(mInputRect.height() / mModeSize.height());
+        int scale = Math.max(1, Math.max(sx, sy));
+        return Integer.highestOneBit(scale);
+    }
+
+    public Bitmap getBitmap() {
+        if (!mImageOK)
+            return null;
+
+        Bitmap result = Bitmap.createBitmap(mModeSize.width(), mModeSize.height(), Bitmap.Config.ARGB_8888);
+        mImageDrawRect.set(getIntRect(mInputRect));
+        adjustCanvasAndImageRect(mModeSize.width(), mModeSize.height());
+
+        Canvas canvas = new Canvas(result);
+        canvas.drawColor(Color.BLACK);
+        drawBitmap(canvas);
+        mLabelCollection.draw(canvas, mOutputRect, new Rect(0, 0, mModeSize.width(), mModeSize.height()));
+
+        return result;
+    }
+
+    private void drawBitmap(Canvas canvas) {
+        int w = mImageWidth;
+        int h = mImageHeight;
+        for (int i = 0; i < mOrientation / 90; ++i) {
+            int tmp = w;
+            w = h;
+            h = tmp;
+            mImageDrawRect.set(mImageDrawRect.top, h - mImageDrawRect.left, mImageDrawRect.bottom, h - mImageDrawRect.right);
+            mCanvasDrawRect.set(mCanvasDrawRect.top, -mCanvasDrawRect.right, mCanvasDrawRect.bottom, -mCanvasDrawRect.left);
+        }
+        mImageDrawRect.sort();
+        canvas.save();
+        canvas.rotate(mOrientation);
+        if (!mSmallImage) {
+            int sampleSize = getSampleSize();
+            if (sampleSize < mCacheSampleSize || !mCacheRect.contains(mImageDrawRect)) {
+                if (mCacheBitmap != null)
+                    mCacheBitmap.recycle();
+                int cacheWidth = mImageDrawRect.width();
+                int cacheHeight = mImageDrawRect.height();
+                while (cacheWidth * cacheHeight < (sampleSize * 1024 * sampleSize * 1024)) {
+                    cacheWidth += mImageDrawRect.width();
+                    cacheHeight += mImageDrawRect.height();
+                }
+                mCacheRect.set(
+                        Math.max(0, ~(sampleSize - 1) & (mImageDrawRect.centerX() - cacheWidth / 2)),
+                        Math.max(0, ~(sampleSize - 1) & (mImageDrawRect.centerY() - cacheHeight / 2)),
+                        Math.min(mRegionDecoder.getWidth(), ~(sampleSize - 1) & (mImageDrawRect.centerX() + cacheWidth / 2 + sampleSize - 1)),
+                        Math.min(mRegionDecoder.getHeight(), ~(sampleSize - 1) & (mImageDrawRect.centerY() + cacheHeight / 2 + sampleSize - 1)));
+                mBitmapOptions.inSampleSize = mCacheSampleSize = sampleSize;
+                mCacheBitmap = mRegionDecoder.decodeRegion(mCacheRect, mBitmapOptions);
+            }
+            mImageDrawRect.offset(-mCacheRect.left, -mCacheRect.top);
+            mImageDrawRect.left /= mCacheSampleSize;
+            mImageDrawRect.top /= mCacheSampleSize;
+            mImageDrawRect.right /= mCacheSampleSize;
+            mImageDrawRect.bottom /= mCacheSampleSize;
+        }
+        canvas.drawBitmap(mCacheBitmap, mImageDrawRect, mCanvasDrawRect, mPaint);
+        canvas.restore();
+    }
+
+    private void editLabelBegin(float x, float y) {
+        Label label = mLabelCollection.editLabelBegin(x, y);
+        ((MainActivity) getContext()).startEditTextActivity(label);
+    }
+
+    public void editLabelEnd(Label label) {
+        mLabelCollection.editLabelEnd(label);
+    }
+
+    public LabelCollection getLabels() {
+        return mLabelCollection;
+    }
+}

app/src/main/java/om/sstvencoder/EditTextActivity.java

@@ -0,0 +1,122 @@
+/*
+Copyright 2017 Olga Miller <olga.rgb@gmail.com>
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+package om.sstvencoder;
+
+import android.content.Intent;
+import android.support.annotation.NonNull;
+import android.support.v7.app.AppCompatActivity;
+import android.os.Bundle;
+import android.view.Menu;
+import android.view.MenuItem;
+import android.view.View;
+import android.widget.AdapterView;
+import android.widget.ArrayAdapter;
+import android.widget.CheckBox;
+import android.widget.EditText;
+import android.widget.Spinner;
+
+import om.sstvencoder.ColorPalette.ColorPaletteView;
+import om.sstvencoder.TextOverlay.Label;
+
+public class EditTextActivity extends AppCompatActivity implements AdapterView.OnItemSelectedListener {
+    public static final int REQUEST_CODE = 101;
+    public static final String EXTRA = "EDIT_TEXT_EXTRA";
+    private EditText mEditText;
+    private ColorPaletteView mColorPaletteView;
+    private float mTextSize;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_edit_text);
+        mEditText = (EditText) findViewById(R.id.edit_text);
+        mColorPaletteView = (ColorPaletteView) findViewById(R.id.edit_color);
+    }
+
+    @Override
+    protected void onStart() {
+        super.onStart();
+        Label label = (Label) getIntent().getSerializableExtra(EXTRA);
+        mEditText.setText(label.getText());
+        mTextSize = label.getTextSize();
+        initTextSizeSpinner(textSizeToPosition(mTextSize));
+        ((CheckBox) findViewById(R.id.edit_italic)).setChecked(label.getItalic());
+        ((CheckBox) findViewById(R.id.edit_bold)).setChecked(label.getBold());
+        mColorPaletteView.setColor(label.getForeColor());
+    }
+
+    private void initTextSizeSpinner(int position) {
+        Spinner editTextSize = (Spinner) findViewById(R.id.edit_text_size);
+        editTextSize.setOnItemSelectedListener(this);
+        String[] textSizeList = new String[]{"Small", "Normal", "Large", "Huge"};
+        editTextSize.setAdapter(new ArrayAdapter<>(this, android.R.layout.simple_spinner_dropdown_item, textSizeList));
+        editTextSize.setSelection(position);
+    }
+
+    private int textSizeToPosition(float textSize) {
+        int position = (int) (textSize - 1f);
+        if (0 <= position && position <= 3)
+            return position;
+        return 1;
+    }
+
+    private float positionToTextSize(int position) {
+        return position + 1f;
+    }
+
+    @Override
+    public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
+        mTextSize = positionToTextSize(position);
+    }
+
+    @Override
+    public void onNothingSelected(AdapterView<?> parent) {
+    }
+
+    @Override
+    public boolean onCreateOptionsMenu(Menu menu) {
+        getMenuInflater().inflate(R.menu.menu_edit_text, menu);
+        return true;
+    }
+
+    @Override
+    public boolean onOptionsItemSelected(MenuItem item) {
+        switch (item.getItemId()) {
+            case R.id.action_done:
+                done();
+                return true;
+        }
+        return super.onOptionsItemSelected(item);
+    }
+
+    private void done() {
+        Intent intent = new Intent();
+        intent.putExtra(EXTRA, getLabel());
+        setResult(RESULT_OK, intent);
+        finish();
+    }
+
+    @NonNull
+    private Label getLabel() {
+        Label label = new Label();
+        label.setText(mEditText.getText().toString());
+        label.setTextSize(mTextSize);
+        label.setItalic(((CheckBox) findViewById(R.id.edit_italic)).isChecked());
+        label.setBold(((CheckBox) findViewById(R.id.edit_bold)).isChecked());
+        label.setForeColor(mColorPaletteView.getColor());
+        return label;
+    }
+}

app/src/main/java/om/sstvencoder/Encoder.java

@@ -0,0 +1,137 @@
+/*
+Copyright 2017 Olga Miller <olga.rgb@gmail.com>
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+package om.sstvencoder;
+
+import android.graphics.Bitmap;
+
+import java.io.File;
+import java.util.LinkedList;
+import java.util.List;
+
+import om.sstvencoder.ModeInterfaces.IMode;
+import om.sstvencoder.ModeInterfaces.IModeInfo;
+import om.sstvencoder.Modes.ModeFactory;
+import om.sstvencoder.Output.IOutput;
+import om.sstvencoder.Output.OutputFactory;
+
+// Creates IMode instance
+class Encoder {
+    private final Thread mThread;
+    private final List<IMode> mQueue;
+    private boolean mQuit, mStop;
+    private Class<?> mModeClass;
+
+    Encoder() {
+        mQueue = new LinkedList<>();
+        mQuit = false;
+        mStop = false;
+        mModeClass = ModeFactory.getDefaultMode();
+
+        mThread = new Thread() {
+            @Override
+            public void run() {
+                while (true) {
+                    IMode mode;
+                    synchronized (this) {
+                        while (mQueue.isEmpty() && !mQuit) {
+                            try {
+                                wait();
+                            } catch (Exception ignore) {
+                            }
+                        }
+                        if (mQuit)
+                            return;
+
+                        mStop = false;
+                        mode = mQueue.remove(0);
+                    }
+                    mode.init();
+
+                    while (mode.process()) {
+                        synchronized (this) {
+                            if (mQuit || mStop)
+                                break;
+                        }
+                    }
+                    mode.finish(mStop);
+                }
+            }
+        };
+        mThread.start();
+    }
+
+    boolean setMode(String className) {
+        try {
+            mModeClass = Class.forName(className);
+        } catch (Exception ignore) {
+            return false;
+        }
+        return true;
+    }
+
+    IModeInfo getModeInfo() {
+        return ModeFactory.getModeInfo(mModeClass);
+    }
+
+    IModeInfo[] getModeInfoList() {
+        return ModeFactory.getModeInfoList();
+    }
+
+    void play(Bitmap bitmap) {
+        IOutput output = OutputFactory.createOutputForSending();
+        IMode mode = ModeFactory.CreateMode(mModeClass, bitmap, output);
+        if (mode != null)
+            enqueue(mode);
+    }
+
+    boolean save(Bitmap bitmap, File file) {
+        IOutput output = OutputFactory.createOutputForSavingAsWave(file);
+        IMode mode = ModeFactory.CreateMode(mModeClass, bitmap, output);
+        if (mode != null) {
+            mode.init();
+
+            while (mode.process()) {
+                if (mQuit)
+                    break;
+            }
+            mode.finish(mQuit);
+        }
+        return !mQuit;
+    }
+
+    void stop() {
+        synchronized (mThread) {
+            mStop = true;
+            int size = mQueue.size();
+            for (int i = 0; i < size; ++i)
+                mQueue.remove(0).finish(true);
+        }
+    }
+
+    private void enqueue(IMode mode) {
+        synchronized (mThread) {
+            mQueue.add(mode);
+            mThread.notify();
+        }
+    }
+
+    void destroy() {
+        synchronized (mThread) {
+            mQuit = true;
+            mThread.notify();
+        }
+    }
+}

app/src/main/java/om/sstvencoder/MainActivity.java

@@ -0,0 +1,334 @@
+/*
+Copyright 2017 Olga Miller <olga.rgb@gmail.com>
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+package om.sstvencoder;
+
+import android.Manifest;
+import android.annotation.TargetApi;
+import android.app.AlertDialog;
+import android.content.ContentResolver;
+import android.content.ContentValues;
+import android.content.DialogInterface;
+import android.content.Intent;
+import android.content.pm.PackageManager;
+import android.database.Cursor;
+import android.media.ExifInterface;
+import android.net.Uri;
+import android.os.Build;
+import android.os.Bundle;
+import android.provider.MediaStore;
+import android.support.annotation.NonNull;
+import android.support.v4.app.ActivityCompat;
+import android.support.v4.content.ContextCompat;
+import android.support.v4.content.FileProvider;
+import android.support.v7.app.AppCompatActivity;
+import android.system.ErrnoException;
+import android.system.OsConstants;
+import android.view.Menu;
+import android.view.MenuItem;
+import android.view.SubMenu;
+import android.widget.Toast;
+
+import java.io.File;
+import java.io.FileNotFoundException;
+
+import om.sstvencoder.ModeInterfaces.IModeInfo;
+import om.sstvencoder.TextOverlay.Label;
+
+public class MainActivity extends AppCompatActivity {
+    private static final String CLASS_NAME = "ClassName";
+    private static final int REQUEST_IMAGE_CAPTURE = 1;
+    private static final int REQUEST_PICK_IMAGE = 2;
+    private Settings mSettings;
+    private TextOverlayTemplate mTextOverlayTemplate;
+    private CropView mCropView;
+    private Encoder mEncoder;
+    private File mFile;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_main);
+        mCropView = (CropView) findViewById(R.id.cropView);
+        mEncoder = new Encoder();
+        IModeInfo mode = mEncoder.getModeInfo();
+        mCropView.setModeSize(mode.getModeSize());
+        setTitle(mode.getModeName());
+        mSettings = new Settings(this);
+        mSettings.load();
+        mTextOverlayTemplate = new TextOverlayTemplate();
+        mTextOverlayTemplate.load(mCropView.getLabels(), mSettings.getTextOverlayFile());
+        loadImage(getIntent());
+    }
+
+    @Override
+    protected void onNewIntent(Intent intent) {
+        loadImage(intent);
+        super.onNewIntent(intent);
+    }
+
+    private void loadImage(Intent intent) {
+        Uri uri = getImageUriFromIntent(intent);
+        boolean verbose = true;
+        if (uri == null) {
+            uri = mSettings.getImageUri();
+            verbose = false;
+        }
+        if (loadImage(uri, verbose))
+            mSettings.setImageUri(uri);
+    }
+
+    private Uri getImageUriFromIntent(Intent intent) {
+        Uri uri = null;
+        if (isIntentTypeValid(intent.getType()) && isIntentActionValid(intent.getAction())) {
+            uri = intent.hasExtra(Intent.EXTRA_STREAM) ?
+                    (Uri) intent.getParcelableExtra(Intent.EXTRA_STREAM) : intent.getData();
+            if (uri == null) {
+                String s = getString(R.string.load_img_err_txt_unsupported);
+                showErrorMessage(getString(R.string.load_img_err_title), s, s + "\n\n" + intent);
+            }
+        }
+        return uri;
+    }
+
+    // Set verbose to false for any Uri that might have expired (e.g. shared from browser).
+    private boolean loadImage(Uri uri, boolean verbose) {
+        if (uri != null) {
+            try {
+                ContentResolver resolver = getContentResolver();
+                mCropView.setBitmapStream(resolver.openInputStream(uri));
+                mCropView.rotateImage(getOrientation(resolver, uri));
+                return true;
+            } catch (FileNotFoundException ex) {
+                if (ex.getCause() instanceof ErrnoException
+                        && ((ErrnoException) ex.getCause()).errno == OsConstants.EACCES) {
+                    requestPermissions();
+                } else if (verbose) {
+                    String s = getString(R.string.load_img_err_title) + ": \n" + ex.getMessage();
+                    Toast.makeText(this, s, Toast.LENGTH_LONG).show();
+                }
+            } catch (Exception ex) {
+                if (verbose) {
+                    String s = Utility.createMessage(ex) + "\n\n" + uri;
+                    showErrorMessage(getString(R.string.load_img_err_title), ex.getMessage(), s);
+                }
+            }
+        }
+        mCropView.setNoBitmap();
+        return false;
+    }
+
+    private boolean isIntentActionValid(String action) {
+        return Intent.ACTION_SEND.equals(action);
+    }
+
+    private boolean isIntentTypeValid(String type) {
+        return type != null && type.startsWith("image/");
+    }
+
+    @TargetApi(Build.VERSION_CODES.JELLY_BEAN)
+    private void requestPermissions() {
+        if (Build.VERSION_CODES.JELLY_BEAN > Build.VERSION.SDK_INT)
+            return;
+
+        if (ContextCompat.checkSelfPermission(this, Manifest.permission.READ_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED)
+            ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.READ_EXTERNAL_STORAGE}, 1);
+    }
+
+    private void showErrorMessage(final String title, final String shortText, final String longText) {
+        AlertDialog.Builder builder = new AlertDialog.Builder(this);
+        builder.setTitle(title);
+        builder.setMessage(shortText);
+        builder.setNeutralButton(getString(R.string.btn_ok), null);
+        builder.setPositiveButton(getString(R.string.btn_send_email), new DialogInterface.OnClickListener() {
+            @Override
+            public void onClick(DialogInterface dialog, int which) {
+                String device = Build.MANUFACTURER + ", " + Build.BRAND + ", " + Build.MODEL + ", " + Build.VERSION.RELEASE;
+                String text = longText + "\n\n" + BuildConfig.VERSION_NAME + ", " + device;
+                Intent intent = Utility.createEmailIntent(getString(R.string.email_subject), text);
+                startActivity(Intent.createChooser(intent, getString(R.string.chooser_title)));
+            }
+        });
+        builder.show();
+    }
+
+    private void showOrientationErrorMessage(Uri uri, Exception ex) {
+        String title = getString(R.string.load_img_orientation_err_title);
+        String longText = title + "\n\n" + Utility.createMessage(ex) + "\n\n" + uri;
+        showErrorMessage(title, ex.getMessage(), longText);
+    }
+
+    public int getOrientation(ContentResolver resolver, Uri uri) {
+        int orientation = 0;
+        try {
+            Cursor cursor = resolver.query(uri, new String[]{MediaStore.Images.ImageColumns.ORIENTATION}, null, null, null);
+            if (cursor.moveToFirst())
+                orientation = cursor.getInt(0);
+            cursor.close();
+        } catch (Exception ignore) {
+            try {
+                ExifInterface exif = new ExifInterface(uri.getPath());
+                orientation = Utility.convertToDegrees(exif.getAttributeInt(ExifInterface.TAG_ORIENTATION, 0));
+            } catch (Exception ex) {
+                showOrientationErrorMessage(uri, ex);
+            }
+        }
+        return orientation;
+    }
+
+    @Override
+    public boolean onCreateOptionsMenu(Menu menu) {
+        getMenuInflater().inflate(R.menu.menu_main, menu);
+        createModesMenu(menu);
+        return true;
+    }
+
+    private void createModesMenu(Menu menu) {
+        SubMenu modesSubMenu = menu.findItem(R.id.action_modes).getSubMenu();
+        IModeInfo[] modeInfoList = mEncoder.getModeInfoList();
+        for (IModeInfo modeInfo : modeInfoList) {
+            MenuItem item = modesSubMenu.add(modeInfo.getModeName());
+            Intent intent = new Intent();
+            intent.putExtra(CLASS_NAME, modeInfo.getModeClassName());
+            item.setIntent(intent);
+        }
+    }
+
+    @Override
+    public boolean onOptionsItemSelected(MenuItem item) {
+        switch (item.getItemId()) {
+            case R.id.action_pick_picture:
+                dispatchPickPictureIntent();
+                return true;
+            case R.id.action_take_picture:
+                dispatchTakePictureIntent();
+                return true;
+            case R.id.action_save_wave:
+                save();
+                return true;
+            case R.id.action_play:
+                play();
+                return true;
+            case R.id.action_stop:
+                mEncoder.stop();
+                return true;
+            case R.id.action_rotate:
+                mCropView.rotateImage(90);
+                return true;
+            case R.id.action_modes:
+                return true;
+            default:
+                String className = item.getIntent().getStringExtra(CLASS_NAME);
+                if (mEncoder.setMode(className)) {
+                    IModeInfo modeInfo = mEncoder.getModeInfo();
+                    mCropView.setModeSize(modeInfo.getModeSize());
+                    setTitle(modeInfo.getModeName());
+                }
+                return true;
+        }
+    }
+
+    public void startEditTextActivity(@NonNull Label label) {
+        Intent intent = new Intent(this, EditTextActivity.class);
+        intent.putExtra(EditTextActivity.EXTRA, label);
+        startActivityForResult(intent, EditTextActivity.REQUEST_CODE);
+    }
+
+    private void dispatchTakePictureIntent() {
+        if (!getPackageManager().hasSystemFeature(PackageManager.FEATURE_CAMERA_ANY)) {
+            Toast.makeText(this, "Device has no camera.", Toast.LENGTH_LONG).show();
+            return;
+        }
+        Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
+        if (intent.resolveActivity(getPackageManager()) != null) {
+            mFile = Utility.createImageFilePath();
+            if (mFile != null) {
+                Uri uri = FileProvider.getUriForFile(this, "om.sstvencoder", mFile);
+                intent.putExtra(MediaStore.EXTRA_OUTPUT, uri);
+                startActivityForResult(intent, REQUEST_IMAGE_CAPTURE);
+            }
+        }
+    }
+
+    private void dispatchPickPictureIntent() {
+        Intent intent = new Intent(Intent.ACTION_PICK, MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
+        if (intent.resolveActivity(getPackageManager()) != null)
+            startActivityForResult(intent, REQUEST_PICK_IMAGE);
+    }
+
+    @Override
+    public void onActivityResult(int requestCode, int resultCode, Intent data) {
+        switch (requestCode) {
+            case EditTextActivity.REQUEST_CODE:
+                Label label = null;
+                if (resultCode == RESULT_OK && data != null)
+                    label = (Label) data.getSerializableExtra(EditTextActivity.EXTRA);
+                mCropView.editLabelEnd(label);
+                break;
+            case REQUEST_IMAGE_CAPTURE:
+                if (resultCode == RESULT_OK) {
+                    Uri uri = Uri.fromFile(mFile);
+                    if (loadImage(uri, true)) {
+                        mSettings.setImageUri(uri);
+                        addImageToGallery(uri);
+                    }
+                }
+                break;
+            case REQUEST_PICK_IMAGE:
+                if (resultCode == RESULT_OK && data != null) {
+                    Uri uri = data.getData();
+                    if (loadImage(uri, true))
+                        mSettings.setImageUri(uri);
+                }
+                break;
+            default:
+                super.onActivityResult(requestCode, resultCode, data);
+                break;
+        }
+    }
+
+    private void addImageToGallery(Uri uri) {
+        Intent intent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
+        intent.setData(uri);
+        sendBroadcast(intent);
+    }
+
+    private void play() {
+        mEncoder.play(mCropView.getBitmap());
+    }
+
+    private void save() {
+        File file = Utility.createWaveFilePath();
+        if (mEncoder.save(mCropView.getBitmap(), file)) {
+            ContentValues values = Utility.getWavContentValues(file);
+            Uri uri = MediaStore.Audio.Media.getContentUriForPath(file.getAbsolutePath());
+            getContentResolver().insert(uri, values);
+            Toast.makeText(this, file.getName() + " saved.", Toast.LENGTH_SHORT).show();
+        }
+    }
+
+    @Override
+    protected void onPause() {
+        super.onPause();
+        mSettings.save();
+        mTextOverlayTemplate.save(mCropView.getLabels(), mSettings.getTextOverlayFile());
+    }
+
+    @Override
+    protected void onDestroy() {
+        super.onDestroy();
+        mEncoder.destroy();
+    }
+}

app/src/main/java/om/sstvencoder/ModeInterfaces/IMode.java

@@ -0,0 +1,24 @@
+/*
+Copyright 2017 Olga Miller <olga.rgb@gmail.com>
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+package om.sstvencoder.ModeInterfaces;
+
+public interface IMode {
+    void init();
+
+    boolean process();
+
+    void finish(boolean cancel);
+}

app/src/main/java/om/sstvencoder/ModeInterfaces/IModeInfo.java

@@ -0,0 +1,24 @@
+/*
+Copyright 2017 Olga Miller <olga.rgb@gmail.com>
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+package om.sstvencoder.ModeInterfaces;
+
+public interface IModeInfo {
+    int getModeName();
+
+    String getModeClassName();
+
+    ModeSize getModeSize();
+}

app/src/main/java/om/sstvencoder/ModeInterfaces/ModeSize.java

@@ -0,0 +1,29 @@
+/*
+Copyright 2017 Olga Miller <olga.rgb@gmail.com>
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+package om.sstvencoder.ModeInterfaces;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+@Target({ElementType.TYPE})
+@Retention(RetentionPolicy.RUNTIME)
+public @interface ModeSize {
+    int width();
+
+    int height();
+}

app/src/main/java/om/sstvencoder/Modes/ImageFormats/NV21.java

@@ -0,0 +1,60 @@
+/*
+Copyright 2017 Olga Miller <olga.rgb@gmail.com>
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+package om.sstvencoder.Modes.ImageFormats;
+
+import android.graphics.Bitmap;
+
+class NV21 extends Yuv {
+    NV21(Bitmap bitmap) {
+        super(bitmap);
+    }
+
+    protected void convertBitmapToYuv(Bitmap bitmap) {
+        mYuv = new byte[(3 * mWidth * mHeight) / 2];
+        int pos = 0;
+
+        for (int h = 0; h < mHeight; ++h)
+            for (int w = 0; w < mWidth; ++w)
+                mYuv[pos++] = (byte) YuvConverter.convertToY(bitmap.getPixel(w, h));
+
+        for (int h = 0; h < mHeight; h += 2) {
+            for (int w = 0; w < mWidth; w += 2) {
+                int v0 = YuvConverter.convertToV(bitmap.getPixel(w, h));
+                int v1 = YuvConverter.convertToV(bitmap.getPixel(w + 1, h));
+                int v2 = YuvConverter.convertToV(bitmap.getPixel(w, h + 1));
+                int v3 = YuvConverter.convertToV(bitmap.getPixel(w + 1, h + 1));
+                mYuv[pos++] = (byte) ((v0 + v1 + v2 + v3) / 4);
+                int u0 = YuvConverter.convertToU(bitmap.getPixel(w, h));
+                int u1 = YuvConverter.convertToU(bitmap.getPixel(w + 1, h));
+                int u2 = YuvConverter.convertToU(bitmap.getPixel(w, h + 1));
+                int u3 = YuvConverter.convertToU(bitmap.getPixel(w + 1, h + 1));
+                mYuv[pos++] = (byte) ((u0 + u1 + u2 + u3) / 4);
+            }
+        }
+    }
+
+    public int getY(int x, int y) {
+        return 255 & mYuv[mWidth * y + x];
+    }
+
+    public int getU(int x, int y) {
+        return 255 & mYuv[mWidth * mHeight + mWidth * (y >> 1) + (x | 1)];
+    }
+
+    public int getV(int x, int y) {
+        return 255 & mYuv[mWidth * mHeight + mWidth * (y >> 1) + (x & ~1)];
+    }
+}

app/src/main/java/om/sstvencoder/Modes/ImageFormats/YUV440P.java

@@ -0,0 +1,61 @@
+/*
+Copyright 2017 Olga Miller <olga.rgb@gmail.com>
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+package om.sstvencoder.Modes.ImageFormats;
+
+import android.graphics.Bitmap;
+
+class YUV440P extends Yuv {
+    YUV440P(Bitmap bitmap) {
+        super(bitmap);
+    }
+
+    protected void convertBitmapToYuv(Bitmap bitmap) {
+        mYuv = new byte[2 * mWidth * mHeight];
+        int pos = 0;
+
+        for (int h = 0; h < mHeight; ++h)
+            for (int w = 0; w < mWidth; ++w)
+                mYuv[pos++] = (byte) YuvConverter.convertToY(bitmap.getPixel(w, h));
+
+        for (int h = 0; h < mHeight; h += 2) {
+            for (int w = 0; w < mWidth; ++w) {
+                int u0 = YuvConverter.convertToU(bitmap.getPixel(w, h));
+                int u1 = YuvConverter.convertToU(bitmap.getPixel(w, h + 1));
+                mYuv[pos++] = (byte) ((u0 + u1) / 2);
+            }
+        }
+
+        for (int h = 0; h < mHeight; h += 2) {
+            for (int w = 0; w < mWidth; ++w) {
+                int v0 = YuvConverter.convertToV(bitmap.getPixel(w, h));
+                int v1 = YuvConverter.convertToV(bitmap.getPixel(w, h + 1));
+                mYuv[pos++] = (byte) ((v0 + v1) / 2);
+            }
+        }
+    }
+
+    public int getY(int x, int y) {
+        return 255 & mYuv[mWidth * y + x];
+    }
+
+    public int getU(int x, int y) {
+        return 255 & mYuv[mWidth * mHeight + mWidth * (y >> 1) + x];
+    }
+
+    public int getV(int x, int y) {
+        return 255 & mYuv[((3 * mWidth * mHeight) >> 1) + mWidth * (y >> 1) + x];
+    }
+}

app/src/main/java/om/sstvencoder/Modes/ImageFormats/YUY2.java

@@ -0,0 +1,53 @@
+/*
+Copyright 2017 Olga Miller <olga.rgb@gmail.com>
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+package om.sstvencoder.Modes.ImageFormats;
+
+import android.graphics.Bitmap;
+
+class YUY2 extends Yuv {
+    YUY2(Bitmap bitmap) {
+        super(bitmap);
+    }
+
+    protected void convertBitmapToYuv(Bitmap bitmap) {
+        mYuv = new byte[2 * mWidth * mHeight];
+
+        for (int pos = 0, h = 0; h < mHeight; ++h) {
+            for (int w = 0; w < mWidth; w += 2) {
+                mYuv[pos++] = (byte) YuvConverter.convertToY(bitmap.getPixel(w, h));
+                int u0 = YuvConverter.convertToU(bitmap.getPixel(w, h));
+                int u1 = YuvConverter.convertToU(bitmap.getPixel(w + 1, h));
+                mYuv[pos++] = (byte) ((u0 + u1) / 2);
+                mYuv[pos++] = (byte) YuvConverter.convertToY(bitmap.getPixel(w + 1, h));
+                int v0 = YuvConverter.convertToV(bitmap.getPixel(w, h));
+                int v1 = YuvConverter.convertToV(bitmap.getPixel(w + 1, h));
+                mYuv[pos++] = (byte) ((v0 + v1) / 2);
+            }
+        }
+    }
+
+    public int getY(int x, int y) {
+        return 255 & mYuv[2 * mWidth * y + 2 * x];
+    }
+
+    public int getU(int x, int y) {
+        return 255 & mYuv[2 * mWidth * y + (((x & ~1) << 1) | 1)];
+    }
+
+    public int getV(int x, int y) {
+        return 255 & mYuv[2 * mWidth * y + ((x << 1) | 3)];
+    }
+}

app/src/main/java/om/sstvencoder/Modes/ImageFormats/YV12.java

@@ -0,0 +1,65 @@
+/*
+Copyright 2017 Olga Miller <olga.rgb@gmail.com>
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+package om.sstvencoder.Modes.ImageFormats;
+
+import android.graphics.Bitmap;
+
+class YV12 extends Yuv {
+    YV12(Bitmap bitmap) {
+        super(bitmap);
+    }
+
+    protected void convertBitmapToYuv(Bitmap bitmap) {
+        mYuv = new byte[(3 * mWidth * mHeight) / 2];
+        int pos = 0;
+
+        for (int h = 0; h < mHeight; ++h)
+            for (int w = 0; w < mWidth; ++w)
+                mYuv[pos++] = (byte) YuvConverter.convertToY(bitmap.getPixel(w, h));
+
+        for (int h = 0; h < mHeight; h += 2) {
+            for (int w = 0; w < mWidth; w += 2) {
+                int u0 = YuvConverter.convertToU(bitmap.getPixel(w, h));
+                int u1 = YuvConverter.convertToU(bitmap.getPixel(w + 1, h));
+                int u2 = YuvConverter.convertToU(bitmap.getPixel(w, h + 1));
+                int u3 = YuvConverter.convertToU(bitmap.getPixel(w + 1, h + 1));
+                mYuv[pos++] = (byte) ((u0 + u1 + u2 + u3) / 4);
+            }
+        }
+
+        for (int h = 0; h < mHeight; h += 2) {
+            for (int w = 0; w < mWidth; w += 2) {
+                int v0 = YuvConverter.convertToV(bitmap.getPixel(w, h));
+                int v1 = YuvConverter.convertToV(bitmap.getPixel(w + 1, h));
+                int v2 = YuvConverter.convertToV(bitmap.getPixel(w, h + 1));
+                int v3 = YuvConverter.convertToV(bitmap.getPixel(w + 1, h + 1));
+                mYuv[pos++] = (byte) ((v0 + v1 + v2 + v3) / 4);
+            }
+        }
+    }
+
+    public int getY(int x, int y) {
+        return 255 & mYuv[mWidth * y + x];
+    }
+
+    public int getU(int x, int y) {
+        return 255 & mYuv[mWidth * mHeight + (mWidth >> 1) * (y >> 1) + (x >> 1)];
+    }
+
+    public int getV(int x, int y) {
+        return 255 & mYuv[((5 * mWidth * mHeight) >> 2) + (mWidth >> 1) * (y >> 1) + (x >> 1)];
+    }
+}

app/src/main/java/om/sstvencoder/Modes/ImageFormats/Yuv.java

@@ -0,0 +1,46 @@
+/*
+Copyright 2017 Olga Miller <olga.rgb@gmail.com>
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+package om.sstvencoder.Modes.ImageFormats;
+
+import android.graphics.Bitmap;
+
+public abstract class Yuv {
+    protected byte[] mYuv;
+    final int mWidth;
+    final int mHeight;
+
+    Yuv(Bitmap bitmap) {
+        mWidth = bitmap.getWidth();
+        mHeight = bitmap.getHeight();
+        convertBitmapToYuv(bitmap);
+    }
+
+    protected abstract void convertBitmapToYuv(Bitmap bitmap);
+
+    public int getWidth() {
+        return mWidth;
+    }
+
+    public int getHeight() {
+        return mHeight;
+    }
+
+    public abstract int getY(int x, int y);
+
+    public abstract int getU(int x, int y);
+
+    public abstract int getV(int x, int y);
+}

app/src/main/java/om/sstvencoder/Modes/ImageFormats/YuvConverter.java

@@ -0,0 +1,45 @@
+/*
+Copyright 2017 Olga Miller <olga.rgb@gmail.com>
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+package om.sstvencoder.Modes.ImageFormats;
+
+import android.graphics.Color;
+
+final class YuvConverter {
+    static int convertToY(int color) {
+        double R = Color.red(color);
+        double G = Color.green(color);
+        double B = Color.blue(color);
+        return clamp(16.0 + (.003906 * ((65.738 * R) + (129.057 * G) + (25.064 * B))));
+    }
+
+    static int convertToU(int color) {
+        double R = Color.red(color);
+        double G = Color.green(color);
+        double B = Color.blue(color);
+        return clamp(128.0 + (.003906 * ((-37.945 * R) + (-74.494 * G) + (112.439 * B))));
+    }
+
+    static int convertToV(int color) {
+        double R = Color.red(color);
+        double G = Color.green(color);
+        double B = Color.blue(color);
+        return clamp(128.0 + (.003906 * ((112.439 * R) + (-94.154 * G) + (-18.285 * B))));
+    }
+
+    private static int clamp(double value) {
+        return value < 0.0 ? 0 : (value > 255.0 ? 255 : (int) value);
+    }
+}

app/src/main/java/om/sstvencoder/Modes/ImageFormats/YuvFactory.java

@@ -0,0 +1,35 @@
+/*
+Copyright 2017 Olga Miller <olga.rgb@gmail.com>
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+package om.sstvencoder.Modes.ImageFormats;
+
+import android.graphics.Bitmap;
+
+public final class YuvFactory {
+    public static Yuv createYuv(Bitmap bitmap, int format) {
+        switch (format) {
+            case YuvImageFormat.YV12:
+                return new YV12(bitmap);
+            case YuvImageFormat.NV21:
+                return new NV21(bitmap);
+            case YuvImageFormat.YUY2:
+                return new YUY2(bitmap);
+            case YuvImageFormat.YUV440P:
+                return new YUV440P(bitmap);
+            default:
+                throw new IllegalArgumentException("Only support YV12, NV21, YUY2 and YUV440P");
+        }
+    }
+}

app/src/main/java/om/sstvencoder/Modes/ImageFormats/YuvImageFormat.java

@@ -0,0 +1,22 @@
+/*
+Copyright 2017 Olga Miller <olga.rgb@gmail.com>
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+package om.sstvencoder.Modes.ImageFormats;
+
+import android.graphics.ImageFormat;
+
+public class YuvImageFormat extends ImageFormat {
+    public static final int YUV440P = 0x50303434;
+}

app/src/main/java/om/sstvencoder/Modes/Martin.java

@@ -0,0 +1,100 @@
+/*
+Copyright 2017 Olga Miller <olga.rgb@gmail.com>
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+package om.sstvencoder.Modes;
+
+import android.graphics.Bitmap;
+import android.graphics.Color;
+
+import om.sstvencoder.Output.IOutput;
+
+abstract class Martin extends Mode {
+    private final int mSyncPulseSamples;
+    private final double mSyncPulseFrequency;
+
+    private final int mSyncPorchSamples;
+    private final double mSyncPorchFrequency;
+
+    private final int mSeparatorSamples;
+    private final double mSeparatorFrequency;
+
+    protected double mColorScanDurationMs;
+    protected int mColorScanSamples;
+
+    Martin(Bitmap bitmap, IOutput output) {
+        super(bitmap, output);
+
+        mSyncPulseSamples = convertMsToSamples(4.862);
+        mSyncPulseFrequency = 1200.0;
+
+        mSyncPorchSamples = convertMsToSamples(0.572);
+        mSyncPorchFrequency = 1500.0;
+
+        mSeparatorSamples = convertMsToSamples(0.572);
+        mSeparatorFrequency = 1500.0;
+    }
+
+    protected int getTransmissionSamples() {
+        int lineSamples = mSyncPulseSamples + mSyncPorchSamples
+                + 3 * (mSeparatorSamples + mColorScanSamples);
+        return mBitmap.getHeight() * lineSamples;
+    }
+
+    protected void writeEncodedLine() {
+        addSyncPulse();
+        addSyncPorch();
+        addGreenScan(mLine);
+        addSeparator();
+        addBlueScan(mLine);
+        addSeparator();
+        addRedScan(mLine);
+        addSeparator();
+    }
+
+    private void addSyncPulse() {
+        for (int i = 0; i < mSyncPulseSamples; ++i)
+            setTone(mSyncPulseFrequency);
+    }
+
+    private void addSyncPorch() {
+        for (int i = 0; i < mSyncPorchSamples; ++i)
+            setTone(mSyncPorchFrequency);
+    }
+
+    private void addSeparator() {
+        for (int i = 0; i < mSeparatorSamples; ++i)
+            setTone(mSeparatorFrequency);
+    }
+
+    private void addGreenScan(int y) {
+        for (int i = 0; i < mColorScanSamples; ++i)
+            setColorTone(Color.green(getColor(i, y)));
+    }
+
+    private void addBlueScan(int y) {
+        for (int i = 0; i < mColorScanSamples; ++i)
+            setColorTone(Color.blue(getColor(i, y)));
+    }
+
+    private void addRedScan(int y) {
+        for (int i = 0; i < mColorScanSamples; ++i)
+            setColorTone(Color.red(getColor(i, y)));
+    }
+
+    private int getColor(int colorScanSample, int y) {
+        int x = colorScanSample * mBitmap.getWidth() / mColorScanSamples;
+        return mBitmap.getPixel(x, y);
+    }
+}

app/src/main/java/om/sstvencoder/Modes/Martin1.java

@@ -0,0 +1,33 @@
+/*
+Copyright 2017 Olga Miller <olga.rgb@gmail.com>
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+package om.sstvencoder.Modes;
+
+import android.graphics.Bitmap;
+
+import om.sstvencoder.ModeInterfaces.ModeSize;
+import om.sstvencoder.Output.IOutput;
+import om.sstvencoder.R;
+
+@ModeSize(width = 320, height = 256)
+@ModeDescription(name = R.string.action_martin1)
+class Martin1 extends Martin {
+    Martin1(Bitmap bitmap, IOutput output) {
+        super(bitmap, output);
+        mVISCode = 44;
+        mColorScanDurationMs = 146.432;
+        mColorScanSamples = convertMsToSamples(mColorScanDurationMs);
+    }
+}

app/src/main/java/om/sstvencoder/Modes/Martin2.java

@@ -0,0 +1,33 @@
+/*
+Copyright 2017 Olga Miller <olga.rgb@gmail.com>
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+package om.sstvencoder.Modes;
+
+import android.graphics.Bitmap;
+
+import om.sstvencoder.ModeInterfaces.ModeSize;
+import om.sstvencoder.Output.IOutput;
+import om.sstvencoder.R;
+
+@ModeSize(width = 320, height = 256)
+@ModeDescription(name = R.string.action_martin2)
+class Martin2 extends Martin {
+    Martin2(Bitmap bitmap, IOutput output) {
+        super(bitmap, output);
+        mVISCode = 40;
+        mColorScanDurationMs = 73.216;
+        mColorScanSamples = convertMsToSamples(mColorScanDurationMs);
+    }
+}

app/src/main/java/om/sstvencoder/Modes/Mode.java

@@ -0,0 +1,133 @@
+/*
+Copyright 2017 Olga Miller <olga.rgb@gmail.com>
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+package om.sstvencoder.Modes;
+
+import android.graphics.Bitmap;
+
+import om.sstvencoder.ModeInterfaces.IMode;
+import om.sstvencoder.Output.IOutput;
+
+abstract class Mode implements IMode {
+    protected Bitmap mBitmap;
+    protected int mVISCode;
+    protected int mLine;
+    private IOutput mOutput;
+    private double mSampleRate;
+    private double mRunningIntegral;
+
+    protected Mode(Bitmap bitmap, IOutput output) {
+        mOutput = output;
+        mSampleRate = mOutput.getSampleRate();
+        mBitmap = bitmap;
+    }
+
+    public void init() {
+        mRunningIntegral = 0.0;
+        mLine = 0;
+        mOutput.init(getTotalSamples());
+        writeCalibrationHeader();
+    }
+
+    public boolean process() {
+        if (mLine >= mBitmap.getHeight())
+            return false;
+
+        writeEncodedLine();
+        ++mLine;
+        return true;
+    }
+
+    // Note that also Bitmap will be recycled here
+    public void finish(boolean cancel) {
+        mOutput.finish(cancel);
+        destroyBitmap();
+    }
+
+    private int getTotalSamples() {
+        return getHeaderSamples() + getTransmissionSamples();
+    }
+
+    private int getHeaderSamples() {
+        return 2 * convertMsToSamples(300.0)
+                + convertMsToSamples(10.0)
+                + 10 * convertMsToSamples(30.0);
+    }
+
+    protected abstract int getTransmissionSamples();
+
+    private void writeCalibrationHeader() {
+        int leaderToneSamples = convertMsToSamples(300.0);
+        double leaderToneFrequency = 1900.0;
+
+        int breakSamples = convertMsToSamples(10.0);
+        double breakFrequency = 1200.0;
+
+        int visBitSamples = convertMsToSamples(30.0);
+        double visBitSSFrequency = 1200.0;
+        double[] visBitFrequency = new double[]{1300.0, 1100.0};
+
+        for (int i = 0; i < leaderToneSamples; ++i)
+            setTone(leaderToneFrequency);
+
+        for (int i = 0; i < breakSamples; ++i)
+            setTone(breakFrequency);
+
+        for (int i = 0; i < leaderToneSamples; ++i)
+            setTone(leaderToneFrequency);
+
+        for (int i = 0; i < visBitSamples; ++i)
+            setTone(visBitSSFrequency);
+
+        int parity = 0;
+        for (int pos = 0; pos < 7; ++pos) {
+            int bit = (mVISCode >> pos) & 1;
+            parity ^= bit;
+            for (int i = 0; i < visBitSamples; ++i)
+                setTone(visBitFrequency[bit]);
+        }
+
+        for (int i = 0; i < visBitSamples; ++i)
+            setTone(visBitFrequency[parity]);
+
+        for (int i = 0; i < visBitSamples; ++i)
+            setTone(visBitSSFrequency);
+    }
+
+    protected abstract void writeEncodedLine();
+
+    protected int convertMsToSamples(double durationMs) {
+        return (int) Math.round(durationMs * mSampleRate / 1000.0);
+    }
+
+    protected void setTone(double frequency) {
+        mRunningIntegral += 2.0 * frequency * Math.PI / mSampleRate;
+        mRunningIntegral %= 2.0 * Math.PI;
+        mOutput.write(Math.sin(mRunningIntegral));
+    }
+
+    protected void setColorTone(int color) {
+        double blackFrequency = 1500.0;
+        double whiteFrequency = 2300.0;
+        setTone(color * (whiteFrequency - blackFrequency) / 255.0 + blackFrequency);
+    }
+
+    private void destroyBitmap() {
+        if (mBitmap != null && !mBitmap.isRecycled()) {
+            mBitmap.recycle();
+            mBitmap = null;
+        }
+    }
+}

app/src/main/java/om/sstvencoder/Modes/ModeDescription.java

@@ -0,0 +1,27 @@
+/*
+Copyright 2017 Olga Miller <olga.rgb@gmail.com>
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+package om.sstvencoder.Modes;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+@Target({ElementType.TYPE})
+@Retention(RetentionPolicy.RUNTIME)
+@interface ModeDescription {
+    int name();
+}

app/src/main/java/om/sstvencoder/Modes/ModeFactory.java

@@ -0,0 +1,74 @@
+/*
+Copyright 2017 Olga Miller <olga.rgb@gmail.com>
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+package om.sstvencoder.Modes;
+
+import android.graphics.Bitmap;
+
+import java.lang.reflect.Constructor;
+
+import om.sstvencoder.ModeInterfaces.IMode;
+import om.sstvencoder.ModeInterfaces.IModeInfo;
+import om.sstvencoder.ModeInterfaces.ModeSize;
+import om.sstvencoder.Output.IOutput;
+
+public final class ModeFactory {
+    public static Class<?> getDefaultMode() {
+        return Robot36.class;
+    }
+
+    public static IModeInfo[] getModeInfoList() {
+        return new IModeInfo[]{
+                new ModeInfo(Martin1.class), new ModeInfo(Martin2.class),
+                new ModeInfo(PD50.class), new ModeInfo(PD90.class), new ModeInfo(PD120.class),
+                new ModeInfo(PD160.class), new ModeInfo(PD180.class),
+                new ModeInfo(PD240.class), new ModeInfo(PD290.class),
+                new ModeInfo(Scottie1.class), new ModeInfo(Scottie2.class), new ModeInfo(ScottieDX.class),
+                new ModeInfo(Robot36.class), new ModeInfo(Robot72.class),
+                new ModeInfo(Wraase.class)
+        };
+    }
+
+    public static IModeInfo getModeInfo(Class<?> modeClass) {
+        if (!isModeClassValid(modeClass))
+            return null;
+
+        return new ModeInfo(modeClass);
+    }
+
+    public static IMode CreateMode(Class<?> modeClass, Bitmap bitmap, IOutput output) {
+        Mode mode = null;
+
+        if (bitmap != null && output != null && isModeClassValid(modeClass)) {
+            ModeSize size = modeClass.getAnnotation(ModeSize.class);
+
+            if (bitmap.getWidth() == size.width() && bitmap.getHeight() == size.height()) {
+                try {
+                    Constructor constructor = modeClass.getConstructor(Bitmap.class, IOutput.class);
+                    mode = (Mode) constructor.newInstance(bitmap, output);
+                } catch (Exception ignore) {
+                }
+            }
+        }
+
+        return mode;
+    }
+
+    private static boolean isModeClassValid(Class<?> modeClass) {
+        return Mode.class.isAssignableFrom(modeClass) &&
+                modeClass.isAnnotationPresent(ModeSize.class) &&
+                modeClass.isAnnotationPresent(ModeDescription.class);
+    }
+}

app/src/main/java/om/sstvencoder/Modes/ModeInfo.java

@@ -0,0 +1,39 @@
+/*
+Copyright 2017 Olga Miller <olga.rgb@gmail.com>
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+package om.sstvencoder.Modes;
+
+import om.sstvencoder.ModeInterfaces.IModeInfo;
+import om.sstvencoder.ModeInterfaces.ModeSize;
+
+class ModeInfo implements IModeInfo {
+    private final Class<?> mModeClass;
+
+    ModeInfo(Class<?> modeClass) {
+        mModeClass = modeClass;
+    }
+
+    public int getModeName() {
+        return mModeClass.getAnnotation(ModeDescription.class).name();
+    }
+
+    public String getModeClassName() {
+        return mModeClass.getName();
+    }
+
+    public ModeSize getModeSize() {
+        return mModeClass.getAnnotation(ModeSize.class);
+    }
+}

app/src/main/java/om/sstvencoder/Modes/PD.java

@@ -0,0 +1,87 @@
+/*
+Copyright 2017 Olga Miller <olga.rgb@gmail.com>
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+package om.sstvencoder.Modes;
+
+import android.graphics.Bitmap;
+
+import om.sstvencoder.Modes.ImageFormats.Yuv;
+import om.sstvencoder.Modes.ImageFormats.YuvFactory;
+import om.sstvencoder.Modes.ImageFormats.YuvImageFormat;
+import om.sstvencoder.Output.IOutput;
+
+abstract class PD extends Mode {
+    private final Yuv mYuv;
+
+    private final int mSyncPulseSamples;
+    private final double mSyncPulseFrequency;
+
+    private final int mPorchSamples;
+    private final double mPorchFrequency;
+
+    protected double mColorScanDurationMs;
+    protected int mColorScanSamples;
+
+    PD(Bitmap bitmap, IOutput output) {
+        super(bitmap, output);
+
+        mYuv = YuvFactory.createYuv(mBitmap, YuvImageFormat.YUV440P);
+
+        mSyncPulseSamples = convertMsToSamples(20.0);
+        mSyncPulseFrequency = 1200.0;
+
+        mPorchSamples = convertMsToSamples(2.08);
+        mPorchFrequency = 1500.0;
+    }
+
+    protected int getTransmissionSamples() {
+        int lineSamples = mSyncPulseSamples + mPorchSamples + 4 * mColorScanSamples;
+        return mBitmap.getHeight() / 2 * lineSamples;
+    }
+
+    protected void writeEncodedLine() {
+        addSyncPulse();
+        addPorch();
+        addYScan(mLine);
+        addVScan(mLine);
+        addUScan(mLine);
+        addYScan(++mLine);
+    }
+
+    private void addSyncPulse() {
+        for (int i = 0; i < mSyncPulseSamples; ++i)
+            setTone(mSyncPulseFrequency);
+    }
+
+    private void addPorch() {
+        for (int i = 0; i < mPorchSamples; ++i)
+            setTone(mPorchFrequency);
+    }
+
+    private void addYScan(int y) {
+        for (int i = 0; i < mColorScanSamples; ++i)
+            setColorTone(mYuv.getY((i * mYuv.getWidth()) / mColorScanSamples, y));
+    }
+
+    private void addUScan(int y) {
+        for (int i = 0; i < mColorScanSamples; ++i)
+            setColorTone(mYuv.getU((i * mYuv.getWidth()) / mColorScanSamples, y));
+    }
+
+    private void addVScan(int y) {
+        for (int i = 0; i < mColorScanSamples; ++i)
+            setColorTone(mYuv.getV((i * mYuv.getWidth()) / mColorScanSamples, y));
+    }
+}

app/src/main/java/om/sstvencoder/Modes/PD120.java

@@ -0,0 +1,34 @@
+/*
+Copyright 2017 Olga Miller <olga.rgb@gmail.com>
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+package om.sstvencoder.Modes;
+
+import android.graphics.Bitmap;
+
+import om.sstvencoder.ModeInterfaces.ModeSize;
+import om.sstvencoder.Output.IOutput;
+import om.sstvencoder.R;
+
+@ModeSize(width = 640, height = 496)
+@ModeDescription(name = R.string.action_pd120)
+class PD120 extends PD {
+    PD120(Bitmap bitmap, IOutput output) {
+        super(bitmap, output);
+        mVISCode = 95;
+        mColorScanDurationMs = 121.6;
+        mColorScanSamples = convertMsToSamples(mColorScanDurationMs);
+    }
+}
+

app/src/main/java/om/sstvencoder/Modes/PD160.java

@@ -0,0 +1,34 @@
+/*
+Copyright 2017 Olga Miller <olga.rgb@gmail.com>
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+package om.sstvencoder.Modes;
+
+import android.graphics.Bitmap;
+
+import om.sstvencoder.ModeInterfaces.ModeSize;
+import om.sstvencoder.Output.IOutput;
+import om.sstvencoder.R;
+
+@ModeSize(width = 512, height = 400)
+@ModeDescription(name = R.string.action_pd160)
+class PD160 extends PD {
+    PD160(Bitmap bitmap, IOutput output) {
+        super(bitmap, output);
+        mVISCode = 98;
+        mColorScanDurationMs = 195.584;
+        mColorScanSamples = convertMsToSamples(mColorScanDurationMs);
+    }
+}
+

app/src/main/java/om/sstvencoder/Modes/PD180.java

@@ -0,0 +1,34 @@
+/*
+Copyright 2017 Olga Miller <olga.rgb@gmail.com>
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+package om.sstvencoder.Modes;
+
+import android.graphics.Bitmap;
+
+import om.sstvencoder.ModeInterfaces.ModeSize;
+import om.sstvencoder.Output.IOutput;
+import om.sstvencoder.R;
+
+@ModeSize(width = 640, height = 496)
+@ModeDescription(name = R.string.action_pd180)
+class PD180 extends PD {
+    PD180(Bitmap bitmap, IOutput output) {
+        super(bitmap, output);
+        mVISCode = 96;
+        mColorScanDurationMs = 183.04;
+        mColorScanSamples = convertMsToSamples(mColorScanDurationMs);
+    }
+}
+

app/src/main/java/om/sstvencoder/Modes/PD240.java

@@ -0,0 +1,34 @@
+/*
+Copyright 2017 Olga Miller <olga.rgb@gmail.com>
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+package om.sstvencoder.Modes;
+
+import android.graphics.Bitmap;
+
+import om.sstvencoder.ModeInterfaces.ModeSize;
+import om.sstvencoder.Output.IOutput;
+import om.sstvencoder.R;
+
+@ModeSize(width = 640, height = 496)
+@ModeDescription(name = R.string.action_pd240)
+class PD240 extends PD {
+    PD240(Bitmap bitmap, IOutput output) {
+        super(bitmap, output);
+        mVISCode = 97;
+        mColorScanDurationMs = 244.48;
+        mColorScanSamples = convertMsToSamples(mColorScanDurationMs);
+    }
+}
+

app/src/main/java/om/sstvencoder/Modes/PD290.java

@@ -0,0 +1,34 @@
+/*
+Copyright 2017 Olga Miller <olga.rgb@gmail.com>
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+package om.sstvencoder.Modes;
+
+import android.graphics.Bitmap;
+
+import om.sstvencoder.ModeInterfaces.ModeSize;
+import om.sstvencoder.Output.IOutput;
+import om.sstvencoder.R;
+
+@ModeSize(width = 800, height = 616)
+@ModeDescription(name = R.string.action_pd290)
+class PD290 extends PD {
+    PD290(Bitmap bitmap, IOutput output) {
+        super(bitmap, output);
+        mVISCode = 94;
+        mColorScanDurationMs = 228.8;
+        mColorScanSamples = convertMsToSamples(mColorScanDurationMs);
+    }
+}
+

app/src/main/java/om/sstvencoder/Modes/PD50.java

@@ -0,0 +1,34 @@
+/*
+Copyright 2017 Olga Miller <olga.rgb@gmail.com>
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+package om.sstvencoder.Modes;
+
+import android.graphics.Bitmap;
+
+import om.sstvencoder.ModeInterfaces.ModeSize;
+import om.sstvencoder.Output.IOutput;
+import om.sstvencoder.R;
+
+@ModeSize(width = 320, height = 256)
+@ModeDescription(name = R.string.action_pd50)
+class PD50 extends PD {
+    PD50(Bitmap bitmap, IOutput output) {
+        super(bitmap, output);
+        mVISCode = 93;
+        mColorScanDurationMs = 91.52;
+        mColorScanSamples = convertMsToSamples(mColorScanDurationMs);
+    }
+}
+

app/src/main/java/om/sstvencoder/Modes/PD90.java

@@ -0,0 +1,34 @@
+/*
+Copyright 2017 Olga Miller <olga.rgb@gmail.com>
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+package om.sstvencoder.Modes;
+
+import android.graphics.Bitmap;
+
+import om.sstvencoder.ModeInterfaces.ModeSize;
+import om.sstvencoder.Output.IOutput;
+import om.sstvencoder.R;
+
+@ModeSize(width = 320, height = 256)
+@ModeDescription(name = R.string.action_pd90)
+class PD90 extends PD {
+    PD90(Bitmap bitmap, IOutput output) {
+        super(bitmap, output);
+        mVISCode = 99;
+        mColorScanDurationMs = 170.24;
+        mColorScanSamples = convertMsToSamples(mColorScanDurationMs);
+    }
+}
+

app/src/main/java/om/sstvencoder/Modes/Robot36.java

@@ -0,0 +1,129 @@
+/*
+Copyright 2017 Olga Miller <olga.rgb@gmail.com>
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+package om.sstvencoder.Modes;
+
+import android.graphics.Bitmap;
+
+import om.sstvencoder.Modes.ImageFormats.Yuv;
+import om.sstvencoder.Modes.ImageFormats.YuvFactory;
+import om.sstvencoder.Modes.ImageFormats.YuvImageFormat;
+import om.sstvencoder.ModeInterfaces.ModeSize;
+import om.sstvencoder.Output.IOutput;
+import om.sstvencoder.R;
+
+@ModeSize(width = 320, height = 240)
+@ModeDescription(name = R.string.action_robot36)
+class Robot36 extends Mode {
+    private final Yuv mYuv;
+
+    private final int mLumaScanSamples;
+    private final int mChrominanceScanSamples;
+
+    private final int mSyncPulseSamples;
+    private final double mSyncPulseFrequency;
+
+    private final int mSyncPorchSamples;
+    private final double mSyncPorchFrequency;
+
+    private final int mPorchSamples;
+    private final double mPorchFrequency;
+
+    private final int mSeparatorSamples;
+    private final double mEvenSeparatorFrequency;
+    private final double mOddSeparatorFrequency;
+
+    Robot36(Bitmap bitmap, IOutput output) {
+        super(bitmap, output);
+
+        mYuv = YuvFactory.createYuv(mBitmap, YuvImageFormat.NV21);
+        mVISCode = 8;
+
+        mLumaScanSamples = convertMsToSamples(88.0);
+        mChrominanceScanSamples = convertMsToSamples(44.0);
+
+        mSyncPulseSamples = convertMsToSamples(9.0);
+        mSyncPulseFrequency = 1200.0;
+
+        mSyncPorchSamples = convertMsToSamples(3.0);
+        mSyncPorchFrequency = 1500.0;
+
+        mPorchSamples = convertMsToSamples(1.5);
+        mPorchFrequency = 1900.0;
+
+        mSeparatorSamples = convertMsToSamples(4.5);
+        mEvenSeparatorFrequency = 1500.0;
+        mOddSeparatorFrequency = 2300.0;
+    }
+
+    protected int getTransmissionSamples() {
+        int lineSamples = mSyncPulseSamples + mSyncPorchSamples
+                + mLumaScanSamples + mSeparatorSamples
+                + mPorchSamples + mChrominanceScanSamples;
+        return mBitmap.getHeight() * lineSamples;
+    }
+
+    protected void writeEncodedLine() {
+        addSyncPulse();
+        addSyncPorch();
+        addYScan(mLine);
+
+        if (mLine % 2 == 0) {
+            addSeparator(mEvenSeparatorFrequency);
+            addPorch();
+            addVScan(mLine);
+        } else {
+            addSeparator(mOddSeparatorFrequency);
+            addPorch();
+            addUScan(mLine);
+        }
+    }
+
+    private void addSyncPulse() {
+        for (int i = 0; i < mSyncPulseSamples; ++i)
+            setTone(mSyncPulseFrequency);
+    }
+
+    private void addSyncPorch() {
+        for (int i = 0; i < mSyncPorchSamples; ++i)
+            setTone(mSyncPorchFrequency);
+    }
+
+    private void addSeparator(double separatorFrequency) {
+        for (int i = 0; i < mSeparatorSamples; ++i)
+            setTone(separatorFrequency);
+    }
+
+    private void addPorch() {
+        for (int i = 0; i < mPorchSamples; ++i)
+            setTone(mPorchFrequency);
+    }
+
+    private void addYScan(int y) {
+        for (int i = 0; i < mLumaScanSamples; ++i)
+            setColorTone(mYuv.getY((i * mYuv.getWidth()) / mLumaScanSamples, y));
+    }
+
+    private void addUScan(int y) {
+        for (int i = 0; i < mChrominanceScanSamples; ++i)
+            setColorTone(mYuv.getU((i * mYuv.getWidth()) / mChrominanceScanSamples, y));
+    }
+
+    private void addVScan(int y) {
+        for (int i = 0; i < mChrominanceScanSamples; ++i)
+            setColorTone(mYuv.getV((i * mYuv.getWidth()) / mChrominanceScanSamples, y));
+    }
+}
+

app/src/main/java/om/sstvencoder/Modes/Robot72.java

@@ -0,0 +1,123 @@
+/*
+Copyright 2017 Olga Miller <olga.rgb@gmail.com>
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+package om.sstvencoder.Modes;
+
+import android.graphics.Bitmap;
+
+import om.sstvencoder.Modes.ImageFormats.Yuv;
+import om.sstvencoder.Modes.ImageFormats.YuvFactory;
+import om.sstvencoder.Modes.ImageFormats.YuvImageFormat;
+import om.sstvencoder.ModeInterfaces.ModeSize;
+import om.sstvencoder.Output.IOutput;
+import om.sstvencoder.R;
+
+@ModeSize(width = 320, height = 240)
+@ModeDescription(name = R.string.action_robot72)
+class Robot72 extends Mode {
+    private final Yuv mYuv;
+
+    private final int mLumaScanSamples;
+    private final int mChrominanceScanSamples;
+
+    private final int mSyncPulseSamples;
+    private final double mSyncPulseFrequency;
+
+    private final int mSyncPorchSamples;
+    private final double mSyncPorchFrequency;
+
+    private final int mPorchSamples;
+    private final double mPorchFrequency;
+
+    private final int mSeparatorSamples;
+    private final double mFirstSeparatorFrequency;
+    private final double mSecondSeparatorFrequency;
+
+    Robot72(Bitmap bitmap, IOutput output) {
+        super(bitmap, output);
+
+        mYuv = YuvFactory.createYuv(mBitmap, YuvImageFormat.YUY2);
+        mVISCode = 12;
+
+        mLumaScanSamples = convertMsToSamples(138.0);
+        mChrominanceScanSamples = convertMsToSamples(69.0);
+
+        mSyncPulseSamples = convertMsToSamples(9.0);
+        mSyncPulseFrequency = 1200.0;
+
+        mSyncPorchSamples = convertMsToSamples(3.0);
+        mSyncPorchFrequency = 1500.0;
+
+        mPorchSamples = convertMsToSamples(1.5);
+        mPorchFrequency = 1900.0;
+
+        mSeparatorSamples = convertMsToSamples(4.5);
+        mFirstSeparatorFrequency = 1500.0;
+        mSecondSeparatorFrequency = 2300.0;
+    }
+
+    protected int getTransmissionSamples() {
+        int lineSamples = mSyncPulseSamples + mSyncPorchSamples + mLumaScanSamples
+                + 2 * (mSeparatorSamples + mPorchSamples + mChrominanceScanSamples);
+        return mBitmap.getHeight() * lineSamples;
+    }
+
+    protected void writeEncodedLine() {
+        addSyncPulse();
+        addSyncPorch();
+        addYScan(mLine);
+        addSeparator(mFirstSeparatorFrequency);
+        addPorch();
+        addVScan(mLine);
+        addSeparator(mSecondSeparatorFrequency);
+        addPorch();
+        addUScan(mLine);
+    }
+
+    private void addSyncPulse() {
+        for (int i = 0; i < mSyncPulseSamples; ++i)
+            setTone(mSyncPulseFrequency);
+    }
+
+    private void addSyncPorch() {
+        for (int i = 0; i < mSyncPorchSamples; ++i)
+            setTone(mSyncPorchFrequency);
+    }
+
+    private void addSeparator(double separatorFrequency) {
+        for (int i = 0; i < mSeparatorSamples; ++i)
+            setTone(separatorFrequency);
+    }
+
+    private void addPorch() {
+        for (int i = 0; i < mPorchSamples; ++i)
+            setTone(mPorchFrequency);
+    }
+
+    private void addYScan(int y) {
+        for (int i = 0; i < mLumaScanSamples; ++i)
+            setColorTone(mYuv.getY((i * mYuv.getWidth()) / mLumaScanSamples, y));
+    }
+
+    private void addUScan(int y) {
+        for (int i = 0; i < mChrominanceScanSamples; ++i)
+            setColorTone(mYuv.getU((i * mYuv.getWidth()) / mChrominanceScanSamples, y));
+    }
+
+    private void addVScan(int y) {
+        for (int i = 0; i < mChrominanceScanSamples; ++i)
+            setColorTone(mYuv.getV((i * mYuv.getWidth()) / mChrominanceScanSamples, y));
+    }
+}

app/src/main/java/om/sstvencoder/Modes/Scottie.java

@@ -0,0 +1,102 @@
+/*
+Copyright 2017 Olga Miller <olga.rgb@gmail.com>
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+package om.sstvencoder.Modes;
+
+import android.graphics.Bitmap;
+import android.graphics.Color;
+
+import om.sstvencoder.Output.IOutput;
+
+abstract class Scottie extends Mode {
+    private final int mSyncPulseSamples;
+    private final double mSyncPulseFrequency;
+
+    private final int mSyncPorchSamples;
+    private final double mSyncPorchFrequency;
+
+    private final int mSeparatorSamples;
+    private final double mSeparatorFrequency;
+
+    protected double mColorScanDurationMs;
+    protected int mColorScanSamples;
+
+    Scottie(Bitmap bitmap, IOutput output) {
+        super(bitmap, output);
+
+        mSyncPulseSamples = convertMsToSamples(9.0);
+        mSyncPulseFrequency = 1200.0;
+
+        mSyncPorchSamples = convertMsToSamples(1.5);
+        mSyncPorchFrequency = 1500.0;
+
+        mSeparatorSamples = convertMsToSamples(1.5);
+        mSeparatorFrequency = 1500.0;
+    }
+
+    protected int getTransmissionSamples() {
+        int lineSamples = 2 * mSeparatorSamples + 3 * mColorScanSamples +
+                mSyncPulseSamples + mSyncPorchSamples;
+        return mSyncPulseSamples + mBitmap.getHeight() * lineSamples;
+    }
+
+    protected void writeEncodedLine() {
+        if (mLine == 0)
+            addSyncPulse();
+
+        addSeparator();
+        addGreenScan(mLine);
+        addSeparator();
+        addBlueScan(mLine);
+        addSyncPulse();
+        addSyncPorch();
+        addRedScan(mLine);
+    }
+
+    private void addSyncPulse() {
+        for (int i = 0; i < mSyncPulseSamples; ++i)
+            setTone(mSyncPulseFrequency);
+    }
+
+    private void addSyncPorch() {
+        for (int i = 0; i < mSyncPorchSamples; ++i)
+            setTone(mSyncPorchFrequency);
+    }
+
+    private void addSeparator() {
+        for (int i = 0; i < mSeparatorSamples; ++i)
+            setTone(mSeparatorFrequency);
+    }
+
+    private void addGreenScan(int y) {
+        for (int i = 0; i < mColorScanSamples; ++i)
+            setColorTone(Color.green(getColor(i, y)));
+    }
+
+    private void addBlueScan(int y) {
+        for (int i = 0; i < mColorScanSamples; ++i)
+            setColorTone(Color.blue(getColor(i, y)));
+    }
+
+    private void addRedScan(int y) {
+        for (int i = 0; i < mColorScanSamples; ++i)
+            setColorTone(Color.red(getColor(i, y)));
+    }
+
+    private int getColor(int colorScanSample, int y) {
+        int x = colorScanSample * mBitmap.getWidth() / mColorScanSamples;
+        return mBitmap.getPixel(x, y);
+    }
+}

app/src/main/java/om/sstvencoder/Modes/Scottie1.java

@@ -0,0 +1,33 @@
+/*
+Copyright 2017 Olga Miller <olga.rgb@gmail.com>
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+package om.sstvencoder.Modes;
+
+import android.graphics.Bitmap;
+
+import om.sstvencoder.ModeInterfaces.ModeSize;
+import om.sstvencoder.Output.IOutput;
+import om.sstvencoder.R;
+
+@ModeSize(width = 320, height = 256)
+@ModeDescription(name = R.string.action_scottie1)
+class Scottie1 extends Scottie {
+    Scottie1(Bitmap bitmap, IOutput output) {
+        super(bitmap, output);
+        mVISCode = 60;
+        mColorScanDurationMs = 138.24;
+        mColorScanSamples = convertMsToSamples(mColorScanDurationMs);
+    }
+}

app/src/main/java/om/sstvencoder/Modes/Scottie2.java

@@ -0,0 +1,33 @@
+/*
+Copyright 2017 Olga Miller <olga.rgb@gmail.com>
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+package om.sstvencoder.Modes;
+
+import android.graphics.Bitmap;
+
+import om.sstvencoder.ModeInterfaces.ModeSize;
+import om.sstvencoder.Output.IOutput;
+import om.sstvencoder.R;
+
+@ModeSize(width = 320, height = 256)
+@ModeDescription(name = R.string.action_scottie2)
+class Scottie2 extends Scottie {
+    Scottie2(Bitmap bitmap, IOutput output){
+        super(bitmap, output);
+        mVISCode = 56;
+        mColorScanDurationMs = 88.064;
+        mColorScanSamples = convertMsToSamples(mColorScanDurationMs);
+    }
+}

app/src/main/java/om/sstvencoder/Modes/ScottieDX.java

@@ -0,0 +1,33 @@
+/*
+Copyright 2017 Olga Miller <olga.rgb@gmail.com>
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+package om.sstvencoder.Modes;
+
+import android.graphics.Bitmap;
+
+import om.sstvencoder.ModeInterfaces.ModeSize;
+import om.sstvencoder.Output.IOutput;
+import om.sstvencoder.R;
+
+@ModeSize(width = 320, height = 256)
+@ModeDescription(name = R.string.action_scottie_dx)
+class ScottieDX extends Scottie {
+    ScottieDX(Bitmap bitmap, IOutput output) {
+        super(bitmap, output);
+        mVISCode = 76;
+        mColorScanDurationMs = 345.6;
+        mColorScanSamples = convertMsToSamples(mColorScanDurationMs);
+    }
+}

app/src/main/java/om/sstvencoder/Modes/Wraase.java

@@ -0,0 +1,91 @@
+/*
+Copyright 2017 Olga Miller <olga.rgb@gmail.com>
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+package om.sstvencoder.Modes;
+
+import android.graphics.Bitmap;
+import android.graphics.Color;
+
+import om.sstvencoder.ModeInterfaces.ModeSize;
+import om.sstvencoder.Output.IOutput;
+import om.sstvencoder.R;
+
+@ModeSize(width = 320, height = 256)
+@ModeDescription(name = R.string.action_wraaseSC2_180)
+class Wraase extends Mode {
+    private final int mSyncPulseSamples;
+    private final double mSyncPulseFrequency;
+
+    private final int mPorchSamples;
+    private final double mPorchFrequency;
+
+    private final int mColorScanSamples;
+
+    Wraase(Bitmap bitmap, IOutput output) {
+        super(bitmap, output);
+
+        mVISCode = 55;
+        mColorScanSamples = convertMsToSamples(235.0);
+
+        mSyncPulseSamples = convertMsToSamples(5.5225);
+        mSyncPulseFrequency = 1200.0;
+
+        mPorchSamples = convertMsToSamples(0.5);
+        mPorchFrequency = 1500.0;
+    }
+
+    protected int getTransmissionSamples() {
+        int lineSamples = mSyncPulseSamples + mPorchSamples + 3 * mColorScanSamples;
+        return mBitmap.getHeight() * lineSamples;
+    }
+
+    protected void writeEncodedLine() {
+        addSyncPulse();
+        addPorch();
+        addRedScan(mLine);
+        addGreenScan(mLine);
+        addBlueScan(mLine);
+    }
+
+    private void addSyncPulse() {
+        for (int i = 0; i < mSyncPulseSamples; ++i)
+            setTone(mSyncPulseFrequency);
+    }
+
+    private void addPorch() {
+        for (int i = 0; i < mPorchSamples; ++i)
+            setTone(mPorchFrequency);
+    }
+
+    private void addRedScan(int y) {
+        for (int i = 0; i < mColorScanSamples; ++i)
+            setColorTone(Color.red(getColor(i, y)));
+    }
+
+    private void addGreenScan(int y) {
+        for (int i = 0; i < mColorScanSamples; ++i)
+            setColorTone(Color.green(getColor(i, y)));
+    }
+
+    private void addBlueScan(int y) {
+        for (int i = 0; i < mColorScanSamples; ++i)
+            setColorTone(Color.blue(getColor(i, y)));
+    }
+
+    private int getColor(int colorScanSample, int y) {
+        int x = colorScanSample * mBitmap.getWidth() / mColorScanSamples;
+        return mBitmap.getPixel(x, y);
+    }
+}

app/src/main/java/om/sstvencoder/Output/AudioOutput.java

@@ -0,0 +1,79 @@
+/*
+Copyright 2017 Olga Miller <olga.rgb@gmail.com>
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+package om.sstvencoder.Output;
+
+import android.media.AudioFormat;
+import android.media.AudioManager;
+import android.media.AudioTrack;
+
+class AudioOutput implements IOutput {
+    private final double mSampleRate;
+    private short[] mAudioBuffer;
+    private AudioTrack mAudioTrack;
+    private int mBufferPos;
+
+    AudioOutput(double sampleRate) {
+        mSampleRate = sampleRate;
+        mBufferPos = 0;
+    }
+
+    @Override
+    public void init(int samples) {
+        mAudioBuffer = new short[(5 * (int) mSampleRate) / 2]; // 2.5 seconds of buffer
+        mAudioTrack = new AudioTrack(AudioManager.STREAM_MUSIC,
+                (int) mSampleRate, AudioFormat.CHANNEL_OUT_MONO,
+                AudioFormat.ENCODING_PCM_16BIT, mAudioBuffer.length * 2,
+                AudioTrack.MODE_STREAM);
+        mAudioTrack.play();
+    }
+
+    @Override
+    public double getSampleRate() {
+        return mSampleRate;
+    }
+
+    @Override
+    public void write(double value) {
+        if (mBufferPos == mAudioBuffer.length) {
+            mAudioTrack.write(mAudioBuffer, 0, mAudioBuffer.length);
+            mBufferPos = 0;
+        }
+
+        mAudioBuffer[mBufferPos++] = (short) (value * Short.MAX_VALUE);
+    }
+
+    @Override
+    public void finish(boolean cancel) {
+        if (mAudioTrack != null) {
+            if (!cancel)
+                drainBuffer();
+            mAudioTrack.stop();
+            mAudioTrack.release();
+            mAudioTrack = null;
+            mAudioBuffer = null;
+        }
+    }
+
+    private void drainBuffer() {
+        // The second run makes sure that the previous buffer indeed got played
+        for (int i = 0; i < 2; ++i) {
+            while (mBufferPos < mAudioBuffer.length)
+                mAudioBuffer[mBufferPos++] = 0;
+            mAudioTrack.write(mAudioBuffer, 0, mAudioBuffer.length);
+            mBufferPos = 0;
+        }
+    }
+}

app/src/main/java/om/sstvencoder/Output/IOutput.java

@@ -0,0 +1,26 @@
+/*
+Copyright 2017 Olga Miller <olga.rgb@gmail.com>
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+package om.sstvencoder.Output;
+
+public interface IOutput {
+    double getSampleRate();
+
+    void init(int samples);
+
+    void write(double value);
+
+    void finish(boolean cancel);
+}

app/src/main/java/om/sstvencoder/Output/OutputFactory.java

@@ -0,0 +1,34 @@
+/*
+Copyright 2017 Olga Miller <olga.rgb@gmail.com>
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+package om.sstvencoder.Output;
+
+import java.io.File;
+
+public final class OutputFactory {
+
+    public static IOutput createOutputForSending() {
+        double sampleRate = 44100.0;
+        return new AudioOutput(sampleRate);
+    }
+
+    public static IOutput createOutputForSavingAsWave(File filePath) {
+        double sampleRate = 44100.0;
+
+        if (filePath == null)
+            return null;
+        return new WaveFileOutput(filePath, sampleRate);
+    }
+}

app/src/main/java/om/sstvencoder/Output/WaveFileOutput.java

@@ -0,0 +1,131 @@
+/*
+Copyright 2017 Olga Miller <olga.rgb@gmail.com>
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+package om.sstvencoder.Output;
+
+import java.io.BufferedOutputStream;
+import java.io.File;
+import java.io.FileOutputStream;
+
+class WaveFileOutput implements IOutput {
+    private final double mSampleRate;
+    private File mFile;
+    private BufferedOutputStream mOutputStream;
+    private int mSamples, mWrittenSamples;
+
+    WaveFileOutput(File file, double sampleRate) {
+        mFile = file;
+        mSampleRate = sampleRate;
+    }
+
+    public void init(int samples) {
+        int offset = (int) ((0.01 * mSampleRate) / 2.0);
+        mSamples = samples + 2 * offset;
+        mWrittenSamples = 0;
+        InitOutputStream();
+        writeHeader();
+        padWithZeros(offset);
+    }
+
+    private void writeHeader() {
+        try {
+            int numChannels = 1; // mono
+            int bitsPerSample = Short.SIZE;
+            int blockAlign = numChannels * bitsPerSample / Byte.SIZE;
+            int subchunk2Size = mSamples * blockAlign;
+
+            mOutputStream.write("RIFF".getBytes()); // ChunkID
+            mOutputStream.write(toLittleEndian(36 + subchunk2Size)); // ChunkSize
+            mOutputStream.write("WAVE".getBytes()); // Format
+
+            mOutputStream.write("fmt ".getBytes()); // Subchunk1ID
+            mOutputStream.write(toLittleEndian(16)); // Subchunk1Size
+            mOutputStream.write(toLittleEndian((short) 1)); // AudioFormat
+            mOutputStream.write(toLittleEndian((short) numChannels)); // NumChannels
+            mOutputStream.write(toLittleEndian((int) mSampleRate)); // SampleRate
+            mOutputStream.write(toLittleEndian((int) mSampleRate * blockAlign)); // ByteRate
+            mOutputStream.write(toLittleEndian((short) blockAlign)); // BlockAlign
+            mOutputStream.write(toLittleEndian((short) bitsPerSample)); // BitsPerSample
+
+            mOutputStream.write("data".getBytes()); // Subchunk2ID
+            mOutputStream.write(toLittleEndian(subchunk2Size)); // Subchunk2Size
+        } catch (Exception ignore) {
+        }
+    }
+
+    private void InitOutputStream() {
+        try {
+            mOutputStream = new BufferedOutputStream(new FileOutputStream(mFile));
+        } catch (Exception ignore) {
+        }
+    }
+
+    @Override
+    public double getSampleRate() {
+        return mSampleRate;
+    }
+
+    @Override
+    public void write(double value) {
+        short tmp = (short) (value * Short.MAX_VALUE);
+        ++mWrittenSamples;
+        try {
+            mOutputStream.write(toLittleEndian(tmp));
+        } catch (Exception ignore) {
+        }
+    }
+
+    @Override
+    public void finish(boolean cancel) {
+        if (!cancel)
+            padWithZeros(mSamples);
+
+        try {
+            mOutputStream.close();
+            mOutputStream = null;
+        } catch (Exception ignore) {
+        }
+
+        if (mFile != null) {
+            if (cancel)
+                mFile.delete();
+            mFile = null;
+        }
+    }
+
+    private void padWithZeros(int count) {
+        try {
+            while (mWrittenSamples++ < count)
+                mOutputStream.write(toLittleEndian((short) 0));
+        } catch (Exception ignore) {
+        }
+    }
+
+    private byte[] toLittleEndian(int value) {
+        byte[] buffer = new byte[4];
+        buffer[0] = (byte) (value & 255);
+        buffer[1] = (byte) ((value >> 8) & 255);
+        buffer[2] = (byte) ((value >> 16) & 255);
+        buffer[3] = (byte) ((value >> 24) & 255);
+        return buffer;
+    }
+
+    private byte[] toLittleEndian(short value) {
+        byte[] buffer = new byte[2];
+        buffer[0] = (byte) (value & 255);
+        buffer[1] = (byte) ((value >> 8) & 255);
+        return buffer;
+    }
+}

app/src/main/java/om/sstvencoder/Settings.java

@@ -0,0 +1,147 @@
+/*
+Copyright 2017 Olga Miller <olga.rgb@gmail.com>
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+package om.sstvencoder;
+
+import android.content.Context;
+import android.net.Uri;
+import android.util.JsonReader;
+import android.util.JsonToken;
+import android.util.JsonWriter;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.io.OutputStream;
+import java.io.OutputStreamWriter;
+
+class Settings {
+    private final static String IMAGE_URI = "image_uri";
+    private final static String TEXT_OVERLAY_PATH = "text_overlay_path";
+    private final String mFileName;
+    private Context mContext;
+    private String mImageUri;
+    private String mTextOverlayPath;
+
+    private Settings() {
+        mFileName = "settings.json";
+    }
+
+    Settings(Context context) {
+        this();
+        mContext = context;
+        mImageUri = "";
+    }
+
+    boolean load() {
+        boolean loaded = false;
+        JsonReader reader = null;
+        try {
+            InputStream in = new FileInputStream(getFile());
+            reader = new JsonReader(new InputStreamReader(in, "UTF-8"));
+            readImageUri(reader);
+            readTextOverlayPath(reader);
+            loaded = true;
+        } catch (Exception ignore) {
+        } finally {
+            if (reader != null) {
+                try {
+                    reader.close();
+                } catch (Exception ignore) {
+                }
+            }
+        }
+        return loaded;
+    }
+
+    boolean save() {
+        boolean saved = false;
+        JsonWriter writer = null;
+        try {
+            OutputStream out = new FileOutputStream(getFile());
+            writer = new JsonWriter(new OutputStreamWriter(out, "UTF-8"));
+            writer.setIndent(" ");
+            writeImageUri(writer);
+            writeTextOverlayPath(writer);
+            saved = true;
+        } catch (Exception ignore) {
+        } finally {
+            if (writer != null) {
+                try {
+                    writer.close();
+                } catch (Exception ignore) {
+                }
+            }
+        }
+        return saved;
+    }
+
+    void setImageUri(Uri uri) {
+        mImageUri = uri == null ? "" : uri.toString();
+    }
+
+    Uri getImageUri() {
+        if ("".equals(mImageUri))
+            return null;
+        return Uri.parse(mImageUri);
+    }
+
+    File getTextOverlayFile() {
+        if (mTextOverlayPath == null)
+            mTextOverlayPath = new File(mContext.getFilesDir(), "text_overlay.json").getPath();
+        return new File(mTextOverlayPath);
+    }
+
+    private File getFile() {
+        return new File(mContext.getFilesDir(), mFileName);
+    }
+
+    private void writeImageUri(JsonWriter writer) throws IOException {
+        writer.beginObject();
+        writer.name(IMAGE_URI).value(mImageUri);
+        writer.endObject();
+    }
+
+    private void writeTextOverlayPath(JsonWriter writer) throws IOException {
+        writer.beginObject();
+        writer.name(TEXT_OVERLAY_PATH).value(mTextOverlayPath);
+        writer.endObject();
+    }
+
+    private void readImageUri(JsonReader reader) throws IOException {
+        reader.beginObject();
+        {
+            reader.nextName();
+            if (reader.peek() == JsonToken.NULL) {
+                reader.nextNull();
+                mImageUri = null;
+            } else
+                mImageUri = reader.nextString();
+        }
+        reader.endObject();
+    }
+
+    private void readTextOverlayPath(JsonReader reader) throws IOException {
+        reader.beginObject();
+        {
+            reader.nextName();
+            mTextOverlayPath = reader.nextString();
+        }
+        reader.endObject();
+    }
+}

app/src/main/java/om/sstvencoder/TextOverlay/IReader.java

@@ -0,0 +1,40 @@
+/*
+Copyright 2017 Olga Miller <olga.rgb@gmail.com>
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+package om.sstvencoder.TextOverlay;
+
+import java.io.IOException;
+
+public interface IReader {
+    void beginRootObject() throws IOException;
+
+    void beginObject() throws IOException;
+
+    void endObject() throws IOException;
+
+    void beginArray() throws IOException;
+
+    void endArray() throws IOException;
+
+    boolean hasNext() throws IOException;
+
+    String readString() throws IOException;
+
+    boolean readBoolean() throws IOException;
+
+    float readFloat() throws IOException;
+
+    int readInt() throws IOException;
+}

app/src/main/java/om/sstvencoder/TextOverlay/IWriter.java

@@ -0,0 +1,40 @@
+/*
+Copyright 2017 Olga Miller <olga.rgb@gmail.com>
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+package om.sstvencoder.TextOverlay;
+
+import android.support.annotation.NonNull;
+
+import java.io.IOException;
+
+public interface IWriter {
+    void beginRootObject() throws IOException;
+
+    void beginObject(@NonNull String name) throws IOException;
+
+    void endObject() throws IOException;
+
+    void beginArray(@NonNull String name) throws IOException;
+
+    void endArray() throws IOException;
+
+    void write(@NonNull String name, String value) throws IOException;
+
+    void write(@NonNull String name, boolean value) throws IOException;
+
+    void write(@NonNull String name, float value) throws IOException;
+
+    void write(@NonNull String name, int value) throws IOException;
+}

app/src/main/java/om/sstvencoder/TextOverlay/Label.java

@@ -0,0 +1,96 @@
+/*
+Copyright 2017 Olga Miller <olga.rgb@gmail.com>
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+package om.sstvencoder.TextOverlay;
+
+import android.graphics.Color;
+
+import java.io.Serializable;
+
+public class Label implements Serializable {
+    private String mText;
+    private float mTextSize;
+    private String mFamilyName;
+    private boolean mBold, mItalic;
+    private int mForeColor, mBackColor;
+
+    public Label() {
+        mText = "";
+        mTextSize = 2.0f;
+        mFamilyName = null;
+        mBold = true;
+        mItalic = false;
+        mForeColor = Color.BLACK;
+        mBackColor = Color.TRANSPARENT;
+    }
+
+    public String getText() {
+        return mText;
+    }
+
+    public void setText(String text) {
+        if (text != null)
+            mText = text;
+    }
+
+    public float getTextSize() {
+        return mTextSize;
+    }
+
+    public void setTextSize(float textSize) {
+        if (textSize > 0f)
+            mTextSize = textSize;
+    }
+
+    public String getFamilyName() {
+        return mFamilyName;
+    }
+
+    public void setFamilyName(String familyName) {
+        mFamilyName = familyName;
+    }
+
+    public boolean getBold() {
+        return mBold;
+    }
+
+    public void setBold(boolean bold) {
+        mBold = bold;
+    }
+
+    public boolean getItalic() {
+        return mItalic;
+    }
+
+    public void setItalic(boolean italic) {
+        mItalic = italic;
+    }
+
+    public int getForeColor() {
+        return mForeColor;
+    }
+
+    public void setForeColor(int color) {
+        mForeColor = color;
+    }
+
+    public int getBackColor() {
+        return mBackColor;
+    }
+
+    public void setBackColor(int color) {
+        mBackColor = color;
+    }
+}

app/src/main/java/om/sstvencoder/TextOverlay/LabelCollection.java

@@ -0,0 +1,184 @@
+/*
+Copyright 2017 Olga Miller <olga.rgb@gmail.com>
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+package om.sstvencoder.TextOverlay;
+
+import android.graphics.Canvas;
+import android.graphics.Rect;
+import android.support.annotation.NonNull;
+
+import java.io.IOException;
+import java.util.LinkedList;
+import java.util.List;
+
+import om.sstvencoder.Utility;
+
+public class LabelCollection {
+    private class Size {
+        private float mW, mH;
+
+        Size(float w, float h) {
+            mW = w;
+            mH = h;
+        }
+
+        float width() {
+            return mW;
+        }
+
+        float height() {
+            return mH;
+        }
+    }
+
+    private final List<LabelContainer> mLabels;
+    private Size mScreenSize;
+    private float mTextSizeFactor;
+    private LabelContainer mActiveLabel, mEditLabel;
+    private float mPreviousX, mPreviousY;
+
+    public LabelCollection() {
+        mLabels = new LinkedList<>();
+        mPreviousX = 0f;
+        mPreviousY = 0f;
+    }
+
+    public void update(float w, float h) {
+        if (mScreenSize != null) {
+            float x = (w - mScreenSize.width()) / 2f;
+            float y = (h - mScreenSize.height()) / 2f;
+            for (LabelContainer label : mLabels)
+                label.offset(x, y);
+        }
+        mScreenSize = new Size(w, h);
+        mTextSizeFactor = getTextSizeFactor(w, h);
+        for (LabelContainer label : mLabels)
+            label.update(mTextSizeFactor, w, h);
+    }
+
+    private float getTextSizeFactor(float w, float h) {
+        Rect bounds = Utility.getEmbeddedRect((int) w, (int) h, 320, 240);
+        return 0.1f * bounds.height();
+    }
+
+    public void draw(Canvas canvas) {
+        for (LabelContainer label : mLabels)
+            label.draw(canvas);
+        if (mActiveLabel != null)
+            mActiveLabel.drawActive(canvas);
+    }
+
+    public void draw(Canvas canvas, Rect src, Rect dst) {
+        for (LabelContainer label : mLabels)
+            label.draw(canvas, src, dst);
+    }
+
+    public boolean moveLabelBegin(float x, float y) {
+        mActiveLabel = find(x, y);
+        if (mActiveLabel == null)
+            return false;
+        mLabels.remove(mActiveLabel);
+        mPreviousX = x;
+        mPreviousY = y;
+        return true;
+    }
+
+    public void moveLabel(float x, float y) {
+        mActiveLabel.offset(x - mPreviousX, y - mPreviousY);
+        mActiveLabel.update(mTextSizeFactor, mScreenSize.width(), mScreenSize.height());
+        mPreviousX = x;
+        mPreviousY = y;
+    }
+
+    public void moveLabelEnd() {
+        mLabels.add(mActiveLabel);
+        mActiveLabel = null;
+        mPreviousX = 0f;
+        mPreviousY = 0f;
+    }
+
+    public Label editLabelBegin(float x, float y) {
+        mEditLabel = find(x, y);
+        if (mEditLabel == null) {
+            mEditLabel = new LabelContainer(new Label());
+            mEditLabel.offset(x, y);
+        }
+        return mEditLabel.getContent();
+    }
+
+    public void editLabelEnd(Label label) {
+        if (label != null) { // not canceled
+            if ("".equals(label.getText().trim())) {
+                if (mLabels.contains(mEditLabel))
+                    mLabels.remove(mEditLabel);
+            } else {
+                if (!mLabels.contains(mEditLabel))
+                    mLabels.add(mEditLabel);
+                mEditLabel.setContent(label);
+                mEditLabel.update(mTextSizeFactor, mScreenSize.width(), mScreenSize.height());
+            }
+        }
+        mEditLabel = null;
+    }
+
+    private LabelContainer find(float x, float y) {
+        for (LabelContainer label : mLabels) {
+            if (label.contains(x, y))
+                return label;
+        }
+        return null;
+    }
+
+    private void add(LabelContainer label) {
+        if (mLabels.size() == 0)
+            mLabels.add(label);
+        else
+            mLabels.add(0, label);
+    }
+
+    public void write(@NonNull IWriter writer) throws IOException {
+        writer.beginRootObject();
+        {
+            writer.write("width", mScreenSize.width());
+            writer.write("height", mScreenSize.height());
+            writer.beginArray("labels");
+            {
+                for (LabelContainer label : mLabels)
+                    label.write(writer);
+            }
+            writer.endArray();
+        }
+        writer.endObject();
+    }
+
+    public void read(@NonNull IReader reader) throws IOException {
+        reader.beginRootObject();
+        {
+            float w = reader.readFloat();
+            float h = reader.readFloat();
+            reader.beginArray();
+            {
+                while (reader.hasNext()) {
+                    LabelContainer label = new LabelContainer(new Label());
+                    label.read(reader);
+                    add(label);
+                }
+            }
+            reader.endArray();
+            update(w, h);
+        }
+        reader.endObject();
+    }
+}

app/src/main/java/om/sstvencoder/TextOverlay/LabelContainer.java

@@ -0,0 +1,117 @@
+/*
+Copyright 2017 Olga Miller <olga.rgb@gmail.com>
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+package om.sstvencoder.TextOverlay;
+
+import android.graphics.Canvas;
+import android.graphics.Rect;
+import android.support.annotation.NonNull;
+
+import java.io.IOException;
+
+class LabelContainer {
+    private Label mLabel;
+    private LabelPainter mPainter;
+    private float mX, mY; // left-bottom corner
+
+    LabelContainer(@NonNull Label label) {
+        mLabel = label;
+        mPainter = new LabelPainter(label);
+        mX = mY = 0f;
+    }
+
+    boolean contains(float x, float y) {
+        return mPainter.getBounds().contains(x, y);
+    }
+
+    void draw(Canvas canvas) {
+        mPainter.draw(canvas);
+    }
+
+    void drawActive(Canvas canvas) {
+        mPainter.drawActive(canvas);
+    }
+
+    void draw(Canvas canvas, Rect src, Rect dst) {
+        mPainter.draw(canvas, src, dst);
+    }
+
+    void offset(float x, float y) {
+        mX += x;
+        mY += y;
+    }
+
+    void update(float textSizeFactor, float screenW, float screenH) {
+        mPainter.update(textSizeFactor, screenW, screenH, mX, mY);
+    }
+
+    Label getContent() {
+        return mLabel;
+    }
+
+    void setContent(@NonNull Label label) {
+        mLabel = label;
+        mPainter.setLabel(label);
+    }
+
+    void write(IWriter writer) throws IOException {
+        writer.beginRootObject();
+        {
+            writer.write("position_x", mX);
+            writer.write("position_y", mY);
+            writer.beginObject("label");
+            {
+                writeLabel(writer, mLabel);
+            }
+            writer.endObject();
+        }
+        writer.endObject();
+    }
+
+    void read(IReader reader) throws IOException {
+        reader.beginRootObject();
+        {
+            mX = reader.readFloat();
+            mY = reader.readFloat();
+            reader.beginObject();
+            {
+                readLabel(reader, mLabel);
+            }
+            reader.endObject();
+        }
+        reader.endObject();
+    }
+
+    private void writeLabel(IWriter writer, Label label) throws IOException {
+        writer.write("text", label.getText());
+        writer.write("text_size", label.getTextSize());
+        writer.write("family_name", label.getFamilyName());
+        writer.write("bold", label.getBold());
+        writer.write("italic", label.getItalic());
+        writer.write("fore_color", label.getForeColor());
+        writer.write("back_color", label.getBackColor());
+    }
+
+    private void readLabel(IReader reader, Label label) throws IOException {
+        label.setText(reader.readString());
+        label.setTextSize(reader.readFloat());
+        label.setFamilyName(reader.readString());
+        label.setBold(reader.readBoolean());
+        label.setItalic(reader.readBoolean());
+        label.setForeColor(reader.readInt());
+        label.setBackColor(reader.readInt());
+    }
+}
+

app/src/main/java/om/sstvencoder/TextOverlay/LabelPainter.java

@@ -0,0 +1,303 @@
+/*
+Copyright 2017 Olga Miller <olga.rgb@gmail.com>
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+package om.sstvencoder.TextOverlay;
+
+import android.graphics.Canvas;
+import android.graphics.Color;
+import android.graphics.Paint;
+import android.graphics.Path;
+import android.graphics.Rect;
+import android.graphics.RectF;
+import android.graphics.Typeface;
+import android.support.annotation.NonNull;
+
+class LabelPainter {
+    private interface IDrawer {
+        void draw(Canvas canvas);
+
+        void drawShadow(Canvas canvas);
+
+        void draw(Canvas canvas, Rect src, Rect dst);
+
+        RectF getBounds();
+    }
+
+    private class InDrawer implements IDrawer {
+        private float mSizeFactor;
+        private float mX, mY;
+
+        private InDrawer(float sizeFactor, float x, float y) {
+            mSizeFactor = sizeFactor;
+            mX = x;
+            mY = y;
+            setPaintSettings(mSizeFactor);
+        }
+
+        @Override
+        public void draw(Canvas canvas) {
+            canvas.drawText(mLabel.getText(), mX, mY, mPaint);
+        }
+
+        @Override
+        public void drawShadow(Canvas canvas) {
+            RectF bounds = new RectF(getBounds());
+            float rx = 10f;
+            float ry = 10f;
+
+            mPaint.setColor(Color.LTGRAY);
+            mPaint.setAlpha(100);
+            mPaint.setStyle(Paint.Style.FILL);
+            canvas.drawRoundRect(bounds, rx, ry, mPaint);
+
+            mPaint.setAlpha(255);
+            mPaint.setStyle(Paint.Style.STROKE);
+
+            mPaint.setColor(Color.RED);
+            bounds.inset(-5.0f, -5.0f);
+            canvas.drawRoundRect(bounds, rx, ry, mPaint);
+
+            mPaint.setColor(Color.GREEN);
+            bounds.inset(1.0f, 1.0f);
+            canvas.drawRoundRect(bounds, rx, ry, mPaint);
+
+            mPaint.setColor(Color.BLUE);
+            bounds.inset(1.0f, 1.0f);
+            canvas.drawRoundRect(bounds, rx, ry, mPaint);
+
+            setPaintSettings(mSizeFactor);
+        }
+
+        @Override
+        public void draw(Canvas canvas, Rect src, Rect dst) {
+            float factor = (dst.height() / (float) src.height());
+            float x = (mX - src.left) * factor;
+            float y = (mY - src.top) * factor;
+            setTextSize(factor * mSizeFactor);
+            canvas.drawText(mLabel.getText(), x, y, mPaint);
+            setTextSize(mSizeFactor);
+        }
+
+        @Override
+        public RectF getBounds() {
+            RectF bounds = new RectF(getTextBounds());
+            bounds.offset(mX, mY);
+            return bounds;
+        }
+
+        private Rect getTextBounds() {
+            Rect bounds = new Rect();
+            String text = mLabel.getText();
+            mPaint.getTextBounds(text, 0, text.length(), bounds);
+            return bounds;
+        }
+
+        private void setPaintSettings(float sizeFactor) {
+            mPaint.setAlpha(255);
+            mPaint.setStyle(Paint.Style.FILL);
+            mPaint.setColor(mLabel.getForeColor());
+            mPaint.setTypeface(Typeface.create(mLabel.getFamilyName(), getTypeface()));
+            setTextSize(sizeFactor);
+        }
+
+        private void setTextSize(float sizeFactor) {
+            mPaint.setTextSize(mLabel.getTextSize() * sizeFactor);
+        }
+
+        private int getTypeface() {
+            int typeface = Typeface.NORMAL;
+
+            if (mLabel.getBold() && mLabel.getItalic())
+                typeface = Typeface.BOLD_ITALIC;
+            else {
+                if (mLabel.getBold())
+                    typeface = Typeface.BOLD;
+                else if (mLabel.getItalic())
+                    typeface = Typeface.ITALIC;
+            }
+            return typeface;
+        }
+    }
+
+    private class OutDrawer implements IDrawer {
+        private Path mPath;
+        private RectF mBoundsOutside;
+        private float mMinSize, mX, mY;
+
+        private OutDrawer(float min) {
+            mMinSize = min * 0.5f;
+            mPaint.setAlpha(255);
+        }
+
+        private void leftOut(RectF rect, float screenH) {
+            mX = 0f;
+            mY = Math.min(Math.max(mMinSize, rect.top + rect.height() * 0.5f), screenH - mMinSize);
+            mPath = getLeftAlignedTriangle(mX, mY, mMinSize);
+            mBoundsOutside = new RectF(mX, mY - mMinSize, mX + mMinSize, mY + mMinSize);
+        }
+
+        private void topOut(RectF rect, float screenW) {
+            mX = Math.min(Math.max(mMinSize, rect.left + rect.width() * 0.5f), screenW - mMinSize);
+            mY = 0f;
+            mPath = getTopAlignedTriangle(mX, mY, mMinSize);
+            mBoundsOutside = new RectF(mX - mMinSize, mY, mX + mMinSize * 0.5f, mY + mMinSize);
+        }
+
+        private void rightOut(RectF rect, float screenW, float screenH) {
+            mX = screenW;
+            mY = Math.min(Math.max(mMinSize, rect.top + rect.height() * 0.5f), screenH - mMinSize);
+            mPath = getRightAlignedTriangle(mX, mY, mMinSize);
+            mBoundsOutside = new RectF(mX - mMinSize, mY - mMinSize, mX, mY + mMinSize);
+        }
+
+        private void bottomOut(RectF rect, float screenW, float screenH) {
+            mX = Math.min(Math.max(mMinSize, rect.left + rect.width() * 0.5f), screenW - mMinSize);
+            mY = screenH;
+            mPath = getBottomAlignedTriangle(mX, mY, mMinSize);
+            mBoundsOutside = new RectF(mX - mMinSize, mY - mMinSize, mX + mMinSize, mY);
+        }
+
+        private Path getLeftAlignedTriangle(float x, float y, float r) {
+            Path path = new Path();
+            path.moveTo(x, y - r);
+            path.lineTo(x, y + r);
+            path.lineTo(x + r * 0.6f, y);
+            path.lineTo(x, y - r);
+            return path;
+        }
+
+        private Path getTopAlignedTriangle(float x, float y, float r) {
+            Path path = new Path();
+            path.moveTo(x - r, y);
+            path.lineTo(x, y + r * 0.6f);
+            path.lineTo(x + r, y);
+            path.lineTo(x - r, y);
+            return path;
+        }
+
+        private Path getRightAlignedTriangle(float x, float y, float r) {
+            Path path = new Path();
+            path.moveTo(x, y - r);
+            path.lineTo(x - r * 0.6f, y);
+            path.lineTo(x, y + r);
+            path.lineTo(x, y - r);
+            return path;
+        }
+
+        private Path getBottomAlignedTriangle(float x, float y, float r) {
+            Path path = new Path();
+            path.moveTo(x - r, y);
+            path.lineTo(x, y - r * 0.6f);
+            path.lineTo(x + r, y);
+            path.lineTo(x - r, y);
+            return path;
+        }
+
+        @Override
+        public void draw(Canvas canvas) {
+            mPaint.setColor(mLabel.getForeColor());
+            mPaint.setStyle(Paint.Style.FILL);
+            canvas.drawPath(mPath, mPaint);
+
+            mPaint.setColor(Color.WHITE);
+            mPaint.setStyle(Paint.Style.STROKE);
+            canvas.drawPath(mPath, mPaint);
+        }
+
+        @Override
+        public void draw(Canvas canvas, Rect src, Rect dst) {
+        }
+
+        @Override
+        public void drawShadow(Canvas canvas) {
+            float r = 2f * mMinSize;
+
+            mPaint.setColor(Color.LTGRAY);
+            mPaint.setAlpha(100);
+            mPaint.setStyle(Paint.Style.FILL);
+            canvas.drawCircle(mX, mY, r, mPaint);
+
+            mPaint.setAlpha(255);
+            mPaint.setStyle(Paint.Style.STROKE);
+
+            mPaint.setColor(Color.RED);
+            canvas.drawCircle(mX, mY, r + 1f, mPaint);
+            mPaint.setColor(Color.GREEN);
+            canvas.drawCircle(mX, mY, r, mPaint);
+            mPaint.setColor(Color.BLUE);
+            canvas.drawCircle(mX, mY, r - 1f, mPaint);
+        }
+
+        @Override
+        public RectF getBounds() {
+            return mBoundsOutside;
+        }
+    }
+
+    private final Paint mPaint;
+    private Label mLabel;
+    private IDrawer mDrawer;
+
+    LabelPainter(@NonNull Label label) {
+        mLabel = label;
+        mPaint = new Paint();
+        mPaint.setAntiAlias(true);
+    }
+
+    void draw(Canvas canvas) {
+        mDrawer.draw(canvas);
+    }
+
+    void drawActive(Canvas canvas) {
+        mDrawer.drawShadow(canvas);
+        mDrawer.draw(canvas);
+    }
+
+    void draw(Canvas canvas, Rect src, Rect dst) {
+        mDrawer.draw(canvas, src, dst);
+    }
+
+    RectF getBounds() {
+        return mDrawer.getBounds();
+    }
+
+    void setLabel(@NonNull Label label) {
+        mLabel = label;
+    }
+
+    void update(float sizeFactor, float screenW, float screenH, float x, float y) {
+        InDrawer inDrawer = new InDrawer(sizeFactor, x, y);
+
+        RectF rect = inDrawer.getBounds();
+        float minSize = 1.5f * sizeFactor;
+
+        OutDrawer outDrawer = null;
+        if (rect.right < minSize) { // left out
+            outDrawer = new OutDrawer(minSize);
+            outDrawer.leftOut(rect, screenH);
+        } else if (rect.bottom < minSize) {// top out
+            outDrawer = new OutDrawer(minSize);
+            outDrawer.topOut(rect, screenW);
+        } else if (rect.left > (screenW - minSize)) { // right out
+            outDrawer = new OutDrawer(minSize);
+            outDrawer.rightOut(rect, screenW, screenH);
+        } else if (rect.top > (screenH - minSize)) { // bottom out
+            outDrawer = new OutDrawer(minSize);
+            outDrawer.bottomOut(rect, screenW, screenH);
+        }
+
+        mDrawer = outDrawer == null ? inDrawer : outDrawer;
+    }
+}

app/src/main/java/om/sstvencoder/TextOverlayTemplate.java

@@ -0,0 +1,200 @@
+/*
+Copyright 2017 Olga Miller <olga.rgb@gmail.com>
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+package om.sstvencoder;
+
+import android.support.annotation.NonNull;
+import android.util.JsonReader;
+import android.util.JsonToken;
+import android.util.JsonWriter;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.io.OutputStream;
+import java.io.OutputStreamWriter;
+
+import om.sstvencoder.TextOverlay.IReader;
+import om.sstvencoder.TextOverlay.IWriter;
+import om.sstvencoder.TextOverlay.LabelCollection;
+
+class TextOverlayTemplate {
+    private class LabelCollectionWriter implements IWriter {
+        private JsonWriter mWriter;
+
+        private LabelCollectionWriter(@NonNull JsonWriter writer) {
+            mWriter = writer;
+        }
+
+        @Override
+        public void beginRootObject() throws IOException {
+            mWriter.beginObject();
+        }
+
+        @Override
+        public void beginObject(@NonNull String name) throws IOException {
+            mWriter.name(name);
+            mWriter.beginObject();
+        }
+
+        @Override
+        public void endObject() throws IOException {
+            mWriter.endObject();
+        }
+
+        @Override
+        public void beginArray(@NonNull String name) throws IOException {
+            mWriter.name(name);
+            mWriter.beginArray();
+        }
+
+        @Override
+        public void endArray() throws IOException {
+            mWriter.endArray();
+        }
+
+        @Override
+        public void write(@NonNull String name, String value) throws IOException {
+            mWriter.name(name).value(value);
+        }
+
+        @Override
+        public void write(@NonNull String name, boolean value) throws IOException {
+            mWriter.name(name).value(value);
+        }
+
+        @Override
+        public void write(@NonNull String name, float value) throws IOException {
+            mWriter.name(name).value(value);
+        }
+
+        @Override
+        public void write(@NonNull String name, int value) throws IOException {
+            mWriter.name(name).value(value);
+        }
+    }
+
+    private class LabelCollectionReader implements IReader {
+        private JsonReader mReader;
+
+        private LabelCollectionReader(@NonNull JsonReader reader) {
+            mReader = reader;
+        }
+
+        @Override
+        public void beginRootObject() throws IOException {
+            mReader.beginObject();
+        }
+
+        @Override
+        public void beginObject() throws IOException {
+            mReader.nextName();
+            mReader.beginObject();
+        }
+
+        @Override
+        public void endObject() throws IOException {
+            mReader.endObject();
+        }
+
+        @Override
+        public void beginArray() throws IOException {
+            mReader.nextName();
+            mReader.beginArray();
+        }
+
+        @Override
+        public void endArray() throws IOException {
+            mReader.endArray();
+        }
+
+        @Override
+        public boolean hasNext() throws IOException {
+            return mReader.hasNext();
+        }
+
+        @Override
+        public String readString() throws IOException {
+            mReader.nextName();
+            if (mReader.peek() == JsonToken.NULL) {
+                mReader.nextNull();
+                return null;
+            }
+            return mReader.nextString();
+        }
+
+        @Override
+        public boolean readBoolean() throws IOException {
+            mReader.nextName();
+            return mReader.nextBoolean();
+        }
+
+        @Override
+        public float readFloat() throws IOException {
+            mReader.nextName();
+            return Float.valueOf(mReader.nextString());
+        }
+
+        @Override
+        public int readInt() throws IOException {
+            mReader.nextName();
+            return mReader.nextInt();
+        }
+    }
+
+    boolean load(@NonNull LabelCollection labels, File file) {
+        boolean loaded = false;
+        JsonReader jsonReader = null;
+        try {
+            InputStream in = new FileInputStream(file);
+            jsonReader = new JsonReader(new InputStreamReader(in, "UTF-8"));
+            labels.read(new LabelCollectionReader(jsonReader));
+            loaded = true;
+        } catch (Exception ignore) {
+        } finally {
+            if (jsonReader != null) {
+                try {
+                    jsonReader.close();
+                } catch (Exception ignore) {
+                }
+            }
+        }
+        return loaded;
+    }
+
+    boolean save(@NonNull LabelCollection labels, File file) {
+        boolean saved = false;
+        JsonWriter jsonWriter = null;
+        try {
+            OutputStream out = new FileOutputStream(file);
+            jsonWriter = new JsonWriter(new OutputStreamWriter(out, "UTF-8"));
+            jsonWriter.setIndent(" ");
+            labels.write(new LabelCollectionWriter(jsonWriter));
+            saved = true;
+        } catch (Exception ignore) {
+        } finally {
+            if (jsonWriter != null) {
+                try {
+                    jsonWriter.close();
+                } catch (Exception ignore) {
+                }
+            }
+        }
+        return saved;
+    }
+}

app/src/main/java/om/sstvencoder/Utility.java

@@ -0,0 +1,113 @@
+/*
+Copyright 2017 Olga Miller <olga.rgb@gmail.com>
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+package om.sstvencoder;
+
+import android.content.ContentValues;
+import android.content.Intent;
+import android.graphics.Rect;
+import android.media.ExifInterface;
+import android.os.Environment;
+import android.provider.MediaStore;
+import android.support.annotation.NonNull;
+
+import java.io.File;
+import java.text.SimpleDateFormat;
+import java.util.Date;
+import java.util.Locale;
+
+public final class Utility {
+    @NonNull
+    public static Rect getEmbeddedRect(int w, int h, int iw, int ih) {
+        Rect rect;
+
+        int ow = (9 * w) / 10;
+        int oh = (9 * h) / 10;
+
+        if (iw * oh < ow * ih) {
+            rect = new android.graphics.Rect(0, 0, (iw * oh) / ih, oh);
+            rect.offset((w - (iw * oh) / ih) / 2, (h - oh) / 2);
+        } else {
+            rect = new android.graphics.Rect(0, 0, ow, (ih * ow) / iw);
+            rect.offset((w - ow) / 2, (h - (ih * ow) / iw) / 2);
+        }
+        return rect;
+    }
+
+    static String createMessage(Exception ex) {
+        String message = ex.getMessage() + "\n";
+        for (StackTraceElement el : ex.getStackTrace())
+            message += "\n" + el.toString();
+        return message;
+    }
+
+    @NonNull
+    static Intent createEmailIntent(final String subject, final String text) {
+        Intent intent = new Intent(Intent.ACTION_SEND);
+        intent.setType("text/email");
+        intent.putExtra(Intent.EXTRA_EMAIL, new String[]{"olga.rgb@gmail.com"});
+        intent.putExtra(Intent.EXTRA_SUBJECT, subject);
+        intent.putExtra(Intent.EXTRA_TEXT, text);
+        return intent;
+    }
+
+    static int convertToDegrees(int exifOrientation) {
+        switch (exifOrientation) {
+            case ExifInterface.ORIENTATION_ROTATE_90:
+                return 90;
+            case ExifInterface.ORIENTATION_ROTATE_180:
+                return 180;
+            case ExifInterface.ORIENTATION_ROTATE_270:
+                return 270;
+        }
+        return 0;
+    }
+
+    @NonNull
+    static ContentValues getWavContentValues(File file) {
+        ContentValues values = new ContentValues();
+        values.put(MediaStore.Audio.Media.ALBUM, "SSTV Encoder");
+        values.put(MediaStore.Audio.Media.ARTIST, "");
+        values.put(MediaStore.Audio.Media.DATA, file.toString());
+        values.put(MediaStore.Audio.Media.IS_MUSIC, true);
+        values.put(MediaStore.Audio.Media.MIME_TYPE, "audio/wav");
+        values.put(MediaStore.Audio.Media.TITLE, file.getName());
+        return values;
+    }
+
+    static File createImageFilePath() {
+        File dir = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES);
+        if (!isExternalStorageWritable())
+            return null;
+        return new File(dir, createFileName() + ".jpg");
+    }
+
+    static File createWaveFilePath() {
+        // sdcard/Music
+        File dir = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_MUSIC);
+        if (!isExternalStorageWritable())
+            return null;
+        return new File(dir, createFileName() + ".wav");
+    }
+
+    private static String createFileName() {
+        return new SimpleDateFormat("yyyyMMdd_HHmmss", Locale.US).format(new Date());
+    }
+
+    private static boolean isExternalStorageWritable() {
+        String state = Environment.getExternalStorageState();
+        return Environment.MEDIA_MOUNTED.equals(state);
+    }
+}

app/src/main/res/layout/activity_edit_text.xml

@@ -0,0 +1,53 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:id="@+id/activity_edit_text"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:orientation="vertical"
+    tools:context=".EditTextActivity">
+
+    <EditText
+        android:id="@+id/edit_text"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:imeOptions="actionDone|flagNoExtractUi"
+        android:inputType="text"
+        android:textSize="32sp"/>
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:orientation="horizontal">
+
+        <CheckBox
+            android:id="@+id/edit_italic"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_weight="0.3"
+            android:text="@string/italic"/>
+
+        <CheckBox
+            android:id="@+id/edit_bold"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_weight="0.3"
+            android:checked="true"
+            android:text="@string/bold"/>
+
+        <Spinner
+            android:id="@+id/edit_text_size"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_weight="0.4"
+            android:minHeight="32sp"/>
+
+    </LinearLayout>
+
+    <om.sstvencoder.ColorPalette.ColorPaletteView
+        android:id="@+id/edit_color"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"/>
+
+</LinearLayout>

app/src/main/res/layout/activity_main.xml

@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="utf-8"?>
+<RelativeLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    tools:context=".MainActivity">
+
+    <om.sstvencoder.CropView
+        android:id="@+id/cropView"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:layout_alignParentBottom="true"
+        android:layout_alignParentEnd="true"
+        android:layout_alignParentLeft="true"
+        android:layout_alignParentRight="true"
+        android:layout_alignParentStart="true"
+        android:layout_alignParentTop="true"/>
+
+</RelativeLayout>

app/src/main/res/menu/menu_edit_text.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+<menu
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    tools:context=".EditTextActivity">
+    <item
+        android:id="@+id/action_done"
+        android:icon="@mipmap/sym_keyboard_done_lxx_dark"
+        android:title="@string/action_done"
+        app:showAsAction="always"/>
+</menu>

app/src/main/res/menu/menu_main.xml

@@ -0,0 +1,43 @@
+<?xml version="1.0" encoding="utf-8"?>
+<menu
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    tools:context=".MainActivity">
+    <item
+        android:id="@+id/action_pick_picture"
+        android:icon="@android:drawable/ic_menu_gallery"
+        android:title="@string/action_pick_picture"
+        app:showAsAction="always"/>
+    <item
+        android:id="@+id/action_take_picture"
+        android:icon="@android:drawable/ic_menu_camera"
+        android:title="@string/action_take_picture"
+        app:showAsAction="always"/>
+    <item
+        android:id="@+id/action_save_wave"
+        android:icon="@android:drawable/ic_menu_save"
+        android:title="@string/action_save_wave"
+        app:showAsAction="always"/>
+    <item
+        android:id="@+id/action_play"
+        android:icon="@android:drawable/ic_media_play"
+        android:title="@string/action_play"
+        app:showAsAction="always"/>
+    <item
+        android:id="@+id/action_stop"
+        android:icon="@android:drawable/ic_menu_close_clear_cancel"
+        android:title="@string/action_stop"
+        app:showAsAction="ifRoom"/>
+    <item
+        android:id="@+id/action_rotate"
+        android:icon="@android:drawable/ic_menu_rotate"
+        android:title="@string/action_rotate"
+        app:showAsAction="ifRoom"/>
+    <item
+        android:id="@+id/action_modes"
+        android:title="@string/action_modes"
+        app:showAsAction="ifRoom">
+        <menu/>
+    </item>
+</menu>

app/src/main/res/values/strings.xml

@@ -0,0 +1,36 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <string name="app_name">SSTV Encoder</string>
+    <string name="action_pick_picture">Pick Picture</string>
+    <string name="action_take_picture">Take Picture</string>
+    <string name="action_save_wave">Save Wave File</string>
+    <string name="action_stop">Stop</string>
+    <string name="action_play">Play</string>
+    <string name="action_rotate">Rotate Image</string>
+    <string name="action_done">Done</string>
+    <string name="action_modes">Modes</string>
+    <string name="action_martin1">Martin 1</string>
+    <string name="action_martin2">Martin 2</string>
+    <string name="action_pd50">PD 50</string>
+    <string name="action_pd90">PD 90</string>
+    <string name="action_pd120">PD 120</string>
+    <string name="action_pd160">PD 160</string>
+    <string name="action_pd180">PD 180</string>
+    <string name="action_pd240">PD 240</string>
+    <string name="action_pd290">PD 290</string>
+    <string name="action_scottie1">Scottie 1</string>
+    <string name="action_scottie2">Scottie 2</string>
+    <string name="action_scottie_dx">Scottie DX</string>
+    <string name="action_robot36">Robot 36</string>
+    <string name="action_robot72">Robot 72</string>
+    <string name="action_wraaseSC2_180">Wraase SC2 180</string>
+    <string name="load_img_err_title">Image loading error</string>
+    <string name="load_img_orientation_err_title">Image orientation error</string>
+    <string name="load_img_err_txt_unsupported">Unsupported content.</string>
+    <string name="btn_send_email">Send Email</string>
+    <string name="btn_ok">OK</string>
+    <string name="email_subject">SSTV Encoder - Bug Report</string>
+    <string name="chooser_title">Send Bug Report:</string>
+    <string name="bold">Bold</string>
+    <string name="italic">Italic</string>
+</resources>

app/src/main/res/values/styles.xml

@@ -0,0 +1,3 @@
+<resources>
+    <style name="AppTheme" parent="Base.Theme.AppCompat"/>
+</resources>

app/src/main/res/xml/paths.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<paths xmlns:android="http://schemas.android.com/apk/res/android">
+    <external-path
+        name="pictures"
+        path=""/>
+</paths>