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moved pulse detector code to pulse.rsh

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This commit is contained in:
Ahmet Inan 2015-02-28 11:06:08 +01:00
parent 20b11df2a6
commit a01d6c607b
7 changed files with 83 additions and 46 deletions
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10
app/src/main/rs/calibration_detector.rsh
View file

@ -19,18 +19,14 @@ limitations under the License.
#include "constants.rsh"
#include "state.rsh"
#include "pulse.rsh"
static int calibration_detected(int cnt_quantized)
{
static int ssb_counter;
int ssb_level = cnt_quantized == 0;
int ssb_pulse = !ssb_level && ssb_counter >= ssb_length;
ssb_counter = ssb_level ? ssb_counter + 1 : 0;
static int bit_pos, vis_pos, vis_code;
static int bit_pos = 8, vis_pos, vis_code;
static int vis_counter, bit_counter;
if (ssb_pulse) {
if (pulse_detected(&start_bit_detector, cnt_quantized == 0)) {
vis_code = 0;
bit_pos = 0;
vis_pos = 2 * bit_length;

8
app/src/main/rs/decoder.rs
View file

@ -21,6 +21,7 @@ limitations under the License.
#include "ema.rsh"
#include "ddc.rsh"
#include "fmd.rsh"
#include "pulse.rsh"
#include "scanline_estimator.rsh"
#include "calibration_detector.rsh"
#include "initialization.rsh"
@ -39,7 +40,7 @@ void reset_buffer()
prev_sync_pos = sync_pos = 0;
buffer_pos = 0;
seperator_counter = 0;
sync_counter = sync_length;
fake_pulse(&sync_pulse_detector);
buffer_cleared = 1;
for (int i = 0; i < maximum_width * maximum_height; ++i)
pixel_buffer[i] = rgb(0, 0, 0);
@ -275,11 +276,10 @@ void decode(int samples) {
int dat_quantized = round(dat_value);
int sync_level = cnt_active && cnt_quantized == 0;
int sync_pulse = !sync_level && sync_counter >= sync_length;
sync_counter = sync_level ? sync_counter + 1 : 0;
int sync_pulse = pulse_detected(&sync_pulse_detector, sync_level);
if (sync_pulse) {
prev_sync_pos = sync_pos;
sync_pos = buffer_pos - sync_buildup_length;
sync_pos = buffer_pos + trailing_edge_position(&sync_pulse_detector);
}
static int reset_on_first_sync;

25
app/src/main/rs/initialization.rsh
View file

@ -41,16 +41,15 @@ void initialize(float rate, int length, int iw, int ih, int sw, int sh, int sgw,
hpos = 0;
prev_sync_pos = sync_pos = 0;
buffer_pos = 0;
sync_counter = 0;
seperator_counter = 0;
buffer_cleared = 0;
free_running = 1;
minimum_sync_length = 0.002f * sample_rate;
const float sync_len_tolerance = 0.7;
min_sync_length_5ms = sync_len_tolerance * 0.005f * sample_rate;
min_sync_length_9ms = sync_len_tolerance * 0.009f * sample_rate;
min_sync_length_20ms = sync_len_tolerance * 0.020f * sample_rate;
sync_buildup_length = round((sync_buildup_ms * sample_rate) / 1000.0f);
const float sync_tolerance = 0.7;
sync_pulse_detector_5ms = init_pulse(sync_tolerance * 5.0f, sync_buildup_ms, sample_rate);
sync_pulse_detector_9ms = init_pulse(sync_tolerance * 9.0f, sync_buildup_ms, sample_rate);
sync_pulse_detector_20ms = init_pulse(sync_tolerance * 20.0f, sync_buildup_ms, sample_rate);
sync_pulse_detector = init_pulse(2.0f, sync_buildup_ms, sample_rate);
robot36_scanline_length = round((robot36_scanline_ms * sample_rate) / 1000.0f);
robot72_scanline_length = round((robot72_scanline_ms * sample_rate) / 1000.0f);
@ -72,12 +71,12 @@ void initialize(float rate, int length, int iw, int ih, int sw, int sh, int sgw,
maximum_absolute_deviaton = 0.5f * pairwise_minimum_of_scanline_time_distances * sample_rate;
maximum_variance = pown(0.0005f * sample_rate, 2);
const float vis_seconds = 0.3f;
const float bit_seconds = 0.03f;
const float ssb_tolerance = 0.9f;
vis_length = vis_seconds * sample_rate;
bit_length = bit_seconds * sample_rate;
ssb_length = ssb_tolerance * bit_seconds * sample_rate;
const float vis_ms = 300.0f;
const float bit_ms = 30.0f;
vis_length = round((vis_ms * sample_rate) / 1000.0f);
bit_length = round((bit_ms * sample_rate) / 1000.0f);
const float start_bit_tolerance = 0.9f;
start_bit_detector = init_pulse(start_bit_tolerance * bit_ms, 0, sample_rate);
const float dat_carrier = 1900.0f;
const float cnt_carrier = 1200.0f;

14
app/src/main/rs/modes.rsh
View file

@ -33,7 +33,7 @@ void raw_mode()
freerun_height = maximum_height;
bitmap_width = maximum_width;
bitmap_height = maximum_height;
sync_length = minimum_sync_length;
sync_pulse_detector = init_pulse(2.0f, sync_buildup_ms, sample_rate);
minimum_length = 0.05f * sample_rate;
maximum_length = buffer_length;
scanline_length = maximum_length;
@ -55,7 +55,7 @@ void robot36_mode()
const float uv_scan_ms = 44.0f;
const float seperator_ms = 4.5f;
seperator_length = round((seperator_ms * sample_rate) / 1000.0f);
sync_length = tolerance * (sync_ms * sample_rate) / 1000.0f;
sync_pulse_detector = init_pulse(tolerance * sync_ms, sync_buildup_ms, sample_rate);
float y_begin_ms = sync_porch_ms;
float y_end_ms = y_begin_ms + y_scan_ms;
@ -92,7 +92,7 @@ void robot72_mode()
const float uv_scan_ms = 69.0f;
const float seperator_ms = 4.5f;
seperator_length = round((seperator_ms * sample_rate) / 1000.0f);
sync_length = tolerance * (sync_ms * sample_rate) / 1000.0f;
sync_pulse_detector = init_pulse(tolerance * sync_ms, sync_buildup_ms, sample_rate);
float y_begin_ms = sync_porch_ms;
float y_end_ms = y_begin_ms + y_scan_ms;
@ -132,7 +132,7 @@ static void pd_mode(int mode, int scanline, int blur, float yuv_scan_ms, int wid
const float tolerance = 0.8f;
const float sync_ms = 20.0f;
const float porch_ms = 2.08f;
sync_length = tolerance * (sync_ms * sample_rate) / 1000.0f;
sync_pulse_detector = init_pulse(tolerance * sync_ms, sync_buildup_ms, sample_rate);
float y_even_begin_ms = porch_ms;
float y_even_end_ms = y_even_begin_ms + yuv_scan_ms;
@ -177,7 +177,7 @@ static void martin_mode(int mode, int scanline, int blur, float rgb_scan_ms)
const float sync_porch_ms = 0.572f;
const float seperator_ms = 0.572f;
seperator_length = round((seperator_ms * sample_rate) / 1000.0f);
sync_length = tolerance * (sync_ms * sample_rate) / 1000.0f;
sync_pulse_detector = init_pulse(tolerance * sync_ms, sync_buildup_ms, sample_rate);
float g_begin_ms = sync_porch_ms;
float g_end_ms = g_begin_ms + rgb_scan_ms;
@ -213,7 +213,7 @@ static void scottie_mode(int mode, int scanline, int blur, float rgb_scan_ms)
const float sync_porch_ms = 1.5f;
const float seperator_ms = 1.5f;
seperator_length = round((seperator_ms * sample_rate) / 1000.0f);
sync_length = tolerance * (sync_ms * sample_rate) / 1000.0f;
sync_pulse_detector = init_pulse(tolerance * sync_ms, sync_buildup_ms, sample_rate);
float r_begin_ms = sync_porch_ms;
float r_end_ms = r_begin_ms + rgb_scan_ms;
@ -249,7 +249,7 @@ void wraaseSC2_180_mode()
const float sync_ms = 5.5225f;
const float sync_porch_ms = 0.5f;
const float rgb_scan_ms = 235.0f;
sync_length = tolerance * (sync_ms * sample_rate) / 1000.0f;
sync_pulse_detector = init_pulse(tolerance * sync_ms, sync_buildup_ms, sample_rate);
float r_begin_ms = sync_porch_ms;
float r_end_ms = r_begin_ms + rgb_scan_ms;

46
app/src/main/rs/pulse.rsh Normal file
View file

@ -0,0 +1,46 @@
/*
Copyright 2015 Ahmet Inan <xdsopl@googlemail.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.
*/
#ifndef PULSE_RSH
#define PULSE_RSH
typedef struct {
int counter, length, buildup;
} pulse_t;
static pulse_t init_pulse(float length, float buildup, int rate)
{
return (pulse_t){ 0, round((length * rate) / 1000.0f), round((buildup * rate) / 1000.0f) };
}
static int pulse_detected(pulse_t *pulse, int level)
{
int trailing_edge = !level && pulse->counter >= pulse->length;
pulse->counter = level ? pulse->counter + 1 : 0;
return trailing_edge;
}
static void fake_pulse(pulse_t *pulse)
{
pulse->counter = pulse->length;
}
static int trailing_edge_position(pulse_t *pulse)
{
return -pulse->buildup;
}
#endif

19
app/src/main/rs/scanline_estimator.rsh
View file

@ -20,27 +20,24 @@ limitations under the License.
#include "constants.rsh"
#include "state.rsh"
#include "sma.rsh"
#include "pulse.rsh"
static int scanline_estimator(int sync_level)
{
static int sync_counter;
int sync_pulse = !sync_level && sync_counter >= minimum_sync_length;
int sync_len = sync_counter;
sync_counter = sync_level ? sync_counter + 1 : 0;
static int scanline_counter_5ms, scanline_counter_9ms, scanline_counter_20ms;
++scanline_counter_5ms;
++scanline_counter_9ms;
++scanline_counter_20ms;
if (!sync_pulse)
return -1;
scanline_counter_5ms = scanline_counter_5ms >= buffer_length ? 0 : scanline_counter_5ms;
scanline_counter_9ms = scanline_counter_9ms >= buffer_length ? 0 : scanline_counter_9ms;
scanline_counter_20ms = scanline_counter_20ms >= buffer_length ? 0 : scanline_counter_20ms;
if (sync_len >= min_sync_length_20ms) {
int sync_pulse_5ms = pulse_detected(&sync_pulse_detector_5ms, sync_level);
int sync_pulse_9ms = pulse_detected(&sync_pulse_detector_9ms, sync_level);
int sync_pulse_20ms = pulse_detected(&sync_pulse_detector_20ms, sync_level);
if (sync_pulse_20ms) {
static sma_t sma;
sma_add(&sma, scanline_counter_20ms);
scanline_counter_20ms = 0;
@ -85,7 +82,7 @@ static int scanline_estimator(int sync_level)
return mode_pd240;
else if (min_adev == pd290_adev)
return mode_pd290;
} else if (sync_len >= min_sync_length_9ms) {
} else if (sync_pulse_9ms) {
static sma_t sma;
sma_add(&sma, scanline_counter_9ms);
scanline_counter_9ms = 0;
@ -121,7 +118,7 @@ static int scanline_estimator(int sync_level)
return mode_scottie2;
else if (min_adev == scottieDX_adev)
return mode_scottieDX;
} else if (sync_len >= min_sync_length_5ms) {
} else if (sync_pulse_5ms) {
static sma_t sma;
sma_add(&sma, scanline_counter_5ms);
scanline_counter_5ms = 0;

7
app/src/main/rs/state.rsh
View file

@ -20,6 +20,8 @@ limitations under the License.
static ema_t avg_power;
static ddc_t cnt_ddc, dat_ddc;
static fmd_t cnt_fmd, dat_fmd;
static pulse_t sync_pulse_detector, start_bit_detector;
static pulse_t sync_pulse_detector_5ms, sync_pulse_detector_9ms, sync_pulse_detector_20ms;
static int disable_analyzer;
static int automatic_mode_detection;
static int debug_mode;
@ -27,8 +29,6 @@ static int current_decoder;
static int user_blur, blur_power, free_running;
static int sample_rate, sync_pos, prev_sync_pos;
static int maximum_variance, maximum_absolute_deviaton;
static int minimum_sync_length;
static int min_sync_length_5ms, min_sync_length_9ms, min_sync_length_20ms;
static int scanline_length, minimum_length, maximum_length;
static int vis_length, bit_length, ssb_length;
static int buffer_length, buffer_mask, buffer_pos;
@ -38,13 +38,12 @@ static int maximum_width, maximum_height;
static int freerun_height;
static int spectrum_width, spectrum_height;
static int spectrogram_width, spectrogram_height;
static int sync_length, sync_counter, vpos, hpos;
static int vpos, hpos;
static int seperator_counter, seperator_length;
static int u_sep_begin, u_sep_end, v_sep_begin, v_sep_end;
static int y_even_begin, y_even_end, y_odd_begin, y_odd_end;
static int y_begin, y_end, u_begin, u_end, v_begin, v_end;
static int r_begin, r_end, b_begin, b_end, g_begin, g_end;
static int sync_buildup_length;
static int robot36_scanline_length;
static int robot72_scanline_length;
static int martin1_scanline_length;