added toggle for analyzer

app/src/main/java/xdsopl/robot36/Decoder.java

@@ -26,6 +26,7 @@ import android.support.v8.renderscript.RenderScript;
 
 public class Decoder {
     private boolean drawImage = true, quitThread = false;
+    private boolean enableAnalyzer = true;
     private final MainActivity activity;
     private final ImageView image;
     private final SpectrumView spectrum;
@@ -134,6 +135,7 @@ public class Decoder {
     void sharper_image() { rsDecoder.invoke_decr_blur(); }
     void toggle_debug() { rsDecoder.invoke_toggle_debug(); }
     void toggle_auto() { rsDecoder.invoke_toggle_auto(); }
+    void enable_analyzer(boolean enable) { rsDecoder.invoke_enable_analyzer((enableAnalyzer = enable) ? 1 : 0); }
     void raw_mode() { rsDecoder.invoke_raw_mode(); }
     void robot36_mode() { rsDecoder.invoke_robot36_mode(); }
     void robot72_mode() { rsDecoder.invoke_robot72_mode(); }
@@ -243,7 +245,9 @@ public class Decoder {
             activity.storeBitmap(Bitmap.createBitmap(savedBuffer, savedWidth[0], savedHeight[0], Bitmap.Config.ARGB_8888));
         }
 
-        rsDecoderSpectrumBuffer.copyTo(spectrumBuffer);
-        spectrum.bitmap.setPixels(spectrumBuffer, 0, spectrum.bitmap.getWidth(), 0, 0, spectrum.bitmap.getWidth(), spectrum.bitmap.getHeight());
+        if (enableAnalyzer) {
+            rsDecoderSpectrumBuffer.copyTo(spectrumBuffer);
+            spectrum.bitmap.setPixels(spectrumBuffer, 0, spectrum.bitmap.getWidth(), 0, 0, spectrum.bitmap.getWidth(), spectrum.bitmap.getHeight());
+        }
     }
 }

app/src/main/java/xdsopl/robot36/MainActivity.java

@@ -35,6 +35,7 @@ import android.provider.MediaStore;
 import android.support.v4.app.NotificationCompat;
 import android.view.Menu;
 import android.view.MenuItem;
+import android.view.View;
 import android.widget.LinearLayout;
 import android.widget.ShareActionProvider;
 
@@ -51,6 +52,7 @@ public class MainActivity extends Activity {
     private NotificationManager manager;
     private ShareActionProvider share;
     private int notifyID = 1;
+    private boolean enableAnalyzer = true;
 
     private void showNotification() {
         Intent intent = new Intent(this, MainActivity.class);
@@ -163,7 +165,9 @@ public class MainActivity extends Activity {
 
     private void changeLayoutOrientation(Configuration config) {
         boolean horizontal = config.orientation == Configuration.ORIENTATION_LANDSCAPE;
-        findViewById(R.id.spectrum).setLayoutParams(
+        View spectrum = findViewById(R.id.spectrum);
+        spectrum.setVisibility(enableAnalyzer ? View.VISIBLE : View.GONE);
+        spectrum.setLayoutParams(
                 new LinearLayout.LayoutParams(
                         LinearLayout.LayoutParams.MATCH_PARENT,
                         LinearLayout.LayoutParams.MATCH_PARENT, horizontal ? 1.0f : 10.0f));
@@ -189,6 +193,10 @@ public class MainActivity extends Activity {
             case R.id.action_toggle_auto:
                 decoder.toggle_auto();
                 return true;
+            case R.id.action_toggle_analyzer:
+                decoder.enable_analyzer(enableAnalyzer ^= true);
+                changeLayoutOrientation(getResources().getConfiguration());
+                return true;
             case R.id.action_raw_mode:
                 decoder.raw_mode();
                 return true;

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

@@ -18,6 +18,8 @@
         android:orderInCategory="100" android:showAsAction="never" />
     <item android:id="@+id/action_toggle_auto" android:title="@string/action_toggle_auto"
         android:orderInCategory="100" android:showAsAction="never" />
+    <item android:id="@+id/action_toggle_analyzer" android:title="@string/action_toggle_analyzer"
+        android:orderInCategory="100" android:showAsAction="never" />
     <item android:id="@+id/action_raw_mode" android:title="@string/action_raw_mode"
         android:orderInCategory="100" android:showAsAction="never" />
     <item android:id="@+id/action_robot36_mode" android:title="@string/action_robot36_mode"

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

@@ -5,6 +5,7 @@
     <string name="decoder_running">"decoder is running</string>
     <string name="action_toggle_auto">Toggle Auto Mode</string>
     <string name="action_toggle_debug">Toggle Debug Mode</string>
+    <string name="action_toggle_analyzer">Toggle Analyzer</string>
     <string name="action_raw_mode">Raw Mode</string>
     <string name="action_robot36_mode">Robot36 Mode</string>
     <string name="action_robot72_mode">Robot72 Mode</string>

app/src/main/rs/state.rsh

@@ -20,6 +20,7 @@ limitations under the License.
 static ema_t avg_amplitude, leader_lowpass;
 static ddc_t cnt_ddc, dat_ddc;
 static fmd_t cnt_fmd, dat_fmd;
+static int disable_analyzer;
 static int automatic_mode_detection;
 static int debug_mode;
 static int current_decoder;

app/src/main/rs/stft.rsh

@@ -39,15 +39,36 @@ static void freq_marker(int freq)
     spectrum_buffer[i] = rgb(255, 255, 255);
 }
 
-static void init_analyzer(int sw, int sh)
+static void show_rainbow()
 {
-    spectrum_width = sw;
-    spectrum_height = sh;
     for (int j = 0; j < spectrum_height; ++j)
         for (int i = 0; i < spectrum_width; ++i)
             spectrum_buffer[spectrum_width * j + i] = rainbow((float)i / spectrum_width);
 }
 
+static void clear_spectrum()
+{
+    for (int i = 0; i < spectrum_height * spectrum_width; ++i)
+        spectrum_buffer[i] = 0;
+}
+
+static void init_analyzer(int sw, int sh)
+{
+    disable_analyzer = 0;
+    spectrum_width = sw;
+    spectrum_height = sh;
+    show_rainbow();
+}
+
+void enable_analyzer(int enable)
+{
+    disable_analyzer = !enable;
+    if (disable_analyzer)
+        clear_spectrum();
+    else
+        show_rainbow();
+}
+
 static void spectrum_analyzer(int amplitude)
 {
     const int M = 7;
@@ -56,6 +77,9 @@ static void spectrum_analyzer(int amplitude)
     static complex_t input[radix2_N];
     static complex_t output[radix2_N];
 
+    if (disable_analyzer)
+        return;
+
 #if 1
     const int order = 5;
     const int gain = pown(M, order);