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Merge pull request #20 from cjcliffe/fm-stereo

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FM Stereo now supported, toggle by hovering and pressing SPACE for now
This commit is contained in:
Charles J. Cliffe 2014-12-26 22:21:54 -05:00
commit 01eb62883b
11 changed files with 130 additions and 18 deletions
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2
src/audio/AudioThread.cpp
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@ -112,7 +112,7 @@ static int audioCallback(void *outputBuffer, void *inputBuffer, unsigned int nBu
srcmix->audio_queue_ptr++;
}
} else {
for (int i = 0, iMax = src->currentInput->channels * nBufferFrames; i < iMax; i++) {
for (int i = 0, iMax = srcmix->currentInput->channels * nBufferFrames; i < iMax; i++) {
if (srcmix->audio_queue_ptr >= srcmix->currentInput->data.size()) {
if (srcmix->currentInput) {
srcmix->currentInput->decRefCount();

4
src/demod/DemodDefs.h
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@ -70,13 +70,15 @@ public:
class DemodulatorThreadPostIQData: public ReferenceCounter {
public:
std::vector<liquid_float_complex> data;
int bandwidth;
float audio_resample_ratio;
msresamp_rrrf audio_resampler;
msresamp_rrrf stereo_resampler;
float resample_ratio;
msresamp_crcf resampler;
DemodulatorThreadPostIQData() :
audio_resample_ratio(0), audio_resampler(NULL), resample_ratio(0), resampler(NULL) {
bandwidth(0), audio_resample_ratio(0), audio_resampler(NULL), stereo_resampler(NULL), resample_ratio(0), resampler(NULL) {
}

10
src/demod/DemodulatorInstance.cpp
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@ -146,6 +146,16 @@ void DemodulatorInstance::setActive(bool state) {
audioThread->setActive(state);
}
bool DemodulatorInstance::isStereo() {
return stereo;
}
void DemodulatorInstance::setStereo(bool state) {
stereo = state;
demodulatorThread->setStereo(state);
}
void DemodulatorInstance::squelchAuto() {
DemodulatorThreadControlCommand command;
command.cmd = DemodulatorThreadControlCommand::DEMOD_THREAD_CMD_CTL_SQUELCH_AUTO;

4
src/demod/DemodulatorInstance.h
View File

@ -49,6 +49,9 @@ public:
bool isActive();
void setActive(bool state);
bool isStereo();
void setStereo(bool state);
void squelchAuto();bool isSquelchEnabled();
void setSquelchEnabled(bool state);
@ -56,5 +59,6 @@ private:
std::atomic<std::string *> label;bool terminated;bool demodTerminated;bool audioTerminated;bool preDemodTerminated;
std::atomic<bool> active;
std::atomic<bool> squelch;
std::atomic<bool> stereo;
};

11
src/demod/DemodulatorPreThread.cpp
View File

@ -9,7 +9,7 @@
DemodulatorPreThread::DemodulatorPreThread(DemodulatorThreadInputQueue* pQueueIn, DemodulatorThreadPostInputQueue* pQueueOut,
DemodulatorThreadControlCommandQueue *threadQueueControl, DemodulatorThreadCommandQueue* threadQueueNotify) :
inputQueue(pQueueIn), postInputQueue(pQueueOut), terminated(false), initialized(false), audio_resampler(NULL), resample_ratio(1), audio_resample_ratio(
inputQueue(pQueueIn), postInputQueue(pQueueOut), terminated(false), initialized(false), audio_resampler(NULL), stereo_resampler(NULL), resample_ratio(1), audio_resample_ratio(
1), resampler(NULL), commandQueue(NULL), fir_filter(NULL), audioInputQueue(NULL), threadQueueNotify(threadQueueNotify), threadQueueControl(
threadQueueControl) {
@ -71,6 +71,12 @@ void DemodulatorPreThread::initialize() {
audio_resampler = msresamp_rrrf_create(audio_resample_ratio, As);
// msresamp_crcf_print(audio_resampler);
if (stereo_resampler) {
msresamp_rrrf_destroy(stereo_resampler);
}
stereo_resampler = msresamp_rrrf_create(audio_resample_ratio, As);
initialized = true;
// std::cout << "inputResampleRate " << params.bandwidth << std::endl;
@ -217,8 +223,10 @@ void DemodulatorPreThread::threadMain() {
resamp->audio_resample_ratio = audio_resample_ratio;
resamp->audio_resampler = audio_resampler;
resamp->stereo_resampler = stereo_resampler;
resamp->resample_ratio = resample_ratio;
resamp->resampler = resampler;
resamp->bandwidth = params.bandwidth;
postInputQueue->push(resamp);
}
@ -239,6 +247,7 @@ void DemodulatorPreThread::threadMain() {
fir_filter = result.fir_filter;
resampler = result.resampler;
audio_resampler = result.audio_resampler;
stereo_resampler = result.stereo_resampler;
resample_ratio = result.resample_ratio;
audio_resample_ratio = result.audio_resample_ratio;

1
src/demod/DemodulatorPreThread.h
View File

@ -57,6 +57,7 @@ protected:
float resample_ratio;
msresamp_rrrf audio_resampler;
msresamp_rrrf stereo_resampler;
float audio_resample_ratio;
DemodulatorThreadParameters params;

76
src/demod/DemodulatorThread.cpp
View File

@ -8,8 +8,8 @@
DemodulatorThread::DemodulatorThread(DemodulatorThreadPostInputQueue* pQueue, DemodulatorThreadControlCommandQueue *threadQueueControl,
DemodulatorThreadCommandQueue* threadQueueNotify) :
postInputQueue(pQueue), visOutQueue(NULL), audioInputQueue(NULL), agc(NULL), terminated(false), threadQueueNotify(threadQueueNotify), threadQueueControl(
threadQueueControl), squelch_level(0), squelch_tolerance(0), squelch_enabled(false) {
postInputQueue(pQueue), visOutQueue(NULL), audioInputQueue(NULL), agc(NULL), stereo(false), terminated(false), threadQueueNotify(
threadQueueNotify), threadQueueControl(threadQueueControl), squelch_level(0), squelch_tolerance(0), squelch_enabled(false) {
float kf = 0.5; // modulation factor
fdem = freqdem_create(kf);
@ -31,6 +31,7 @@ void DemodulatorThread::threadMain() {
#endif
msresamp_rrrf audio_resampler = NULL;
msresamp_rrrf stereo_resampler = NULL;
msresamp_crcf resampler = NULL;
agc = agc_crcf_create();
@ -44,7 +45,11 @@ void DemodulatorThread::threadMain() {
std::vector<liquid_float_complex> resampled_data;
std::vector<liquid_float_complex> agc_data;
std::vector<float> demod_output;
std::vector<float> demod_output_stereo;
std::vector<float> resampled_audio_output;
std::vector<float> resampled_audio_output_stereo;
double freq_index = 0;
while (!terminated) {
DemodulatorThreadPostIQData *inp;
@ -61,11 +66,14 @@ void DemodulatorThread::threadMain() {
if (resampler == NULL) {
resampler = inp->resampler;
audio_resampler = inp->audio_resampler;
stereo_resampler = inp->stereo_resampler;
} else if (resampler != inp->resampler) {
msresamp_crcf_destroy(resampler);
msresamp_rrrf_destroy(audio_resampler);
msresamp_rrrf_destroy(stereo_resampler);
resampler = inp->resampler;
audio_resampler = inp->audio_resampler;
stereo_resampler = inp->stereo_resampler;
}
int out_size = ceil((float) (bufSize) * inp->resample_ratio);
@ -89,24 +97,49 @@ void DemodulatorThread::threadMain() {
if (demod_output.size() != num_written) {
if (demod_output.capacity() < num_written) {
demod_output.reserve(num_written);
demod_output_stereo.reserve(num_written);
}
demod_output.resize(num_written);
demod_output_stereo.resize(num_written);
}
freqdem_demodulate_block(fdem, &agc_data[0], num_written, &demod_output[0]);
if (stereo) {
int shift_freq = 38000 - inp->bandwidth;
double freq = (2.0 * M_PI) * (((double) abs(shift_freq)) / ((double) inp->bandwidth));
for (int i = 0; i < num_written; i++) {
freq_index += freq;
demod_output_stereo[i] = demod_output[i] * sin(freq_index); // + demod_output[i] * cos(freq_index);
while (freq_index > (M_PI * 2.0)) {
freq_index -= (M_PI * 2.0);
}
while (freq_index < (M_PI * 2.0)) {
freq_index += (M_PI * 2.0);
}
}
}
int audio_out_size = ceil((float) (num_written) * audio_resample_ratio);
if (audio_out_size != resampled_audio_output.size()) {
if (resampled_audio_output.capacity() < audio_out_size) {
resampled_audio_output.reserve(audio_out_size);
resampled_audio_output_stereo.reserve(audio_out_size);
}
resampled_audio_output.resize(audio_out_size);
resampled_audio_output_stereo.resize(audio_out_size);
}
unsigned int num_audio_written;
msresamp_rrrf_execute(audio_resampler, &demod_output[0], num_written, &resampled_audio_output[0], &num_audio_written);
if (stereo) {
msresamp_rrrf_execute(stereo_resampler, &demod_output_stereo[0], num_written, &resampled_audio_output_stereo[0], &num_audio_written);
}
if (audioInputQueue != NULL) {
if (!squelch_enabled || ((agc_crcf_get_signal_level(agc)) >= 0.1)) {
AudioThreadInput *ati = NULL;
@ -124,8 +157,18 @@ void DemodulatorThread::threadMain() {
}
ati->setRefCount(1);
if (stereo) {
ati->channels = 2;
ati->data.resize(num_audio_written * 2);
for (int i = 0; i < num_audio_written; i++) {
ati->data[i * 2] = (resampled_audio_output[i] - (resampled_audio_output_stereo[i]));
ati->data[i * 2 + 1] = (resampled_audio_output[i] + (resampled_audio_output_stereo[i]));
}
} else {
ati->channels = 1;
ati->data.assign(resampled_audio_output.begin(), resampled_audio_output.begin() + num_audio_written);
}
audioInputQueue->push(ati);
}
@ -136,7 +179,21 @@ void DemodulatorThread::threadMain() {
ati_vis->channels = 1;
int num_vis = DEMOD_VIS_SIZE;
if (stereo) {
int stereoSize = resampled_audio_output.size();
if (stereoSize > DEMOD_VIS_SIZE) {
stereoSize = DEMOD_VIS_SIZE;
}
ati_vis->data.resize(stereoSize);
for (int i = 0; i < stereoSize / 2; i++) {
ati_vis->data[i] = (resampled_audio_output[i] - (resampled_audio_output_stereo[i]));
ati_vis->data[i + stereoSize / 2] = (resampled_audio_output[i] + (resampled_audio_output_stereo[i]));
}
} else {
if (num_audio_written > num_written) {
if (num_vis > num_audio_written) {
num_vis = num_audio_written;
}
@ -148,10 +205,11 @@ void DemodulatorThread::threadMain() {
ati_vis->data.assign(demod_output.begin(), demod_output.begin() + num_vis);
}
visOutQueue->push(ati_vis);
// std::cout << "Signal: " << agc_crcf_get_signal_level(agc) << " -- " << agc_crcf_get_rssi(agc) << "dB " << std::endl;
}
visOutQueue->push(ati_vis);
}
if (!threadQueueControl->empty()) {
while (!threadQueueControl->empty()) {
DemodulatorThreadControlCommand command;
@ -183,6 +241,9 @@ void DemodulatorThread::threadMain() {
if (audio_resampler != NULL) {
msresamp_rrrf_destroy(audio_resampler);
}
if (stereo_resampler != NULL) {
msresamp_rrrf_destroy(stereo_resampler);
}
agc_crcf_destroy(agc);
@ -204,3 +265,12 @@ void DemodulatorThread::terminate() {
DemodulatorThreadPostIQData *inp = new DemodulatorThreadPostIQData; // push dummy to nudge queue
postInputQueue->push(inp);
}
void DemodulatorThread::setStereo(bool state) {
stereo = state;
std::cout << "Stereo " << (state ? "Enabled" : "Disabled") << std::endl;
}
bool DemodulatorThread::isStereo() {
return stereo;
}

4
src/demod/DemodulatorThread.h
View File

@ -35,6 +35,9 @@ public:
void terminate();
void setStereo(bool state);
bool isStereo();
#ifdef __APPLE__
static void *pthread_helper(void *context) {
return ((DemodulatorThread *) context)->threadMain();
@ -49,6 +52,7 @@ protected:
freqdem fdem;
agc_crcf agc;
std::atomic<bool> stereo;
std::atomic<bool> terminated;
DemodulatorThreadCommandQueue* threadQueueNotify;

1
src/demod/DemodulatorWorkerThread.cpp
View File

@ -59,6 +59,7 @@ void DemodulatorWorkerThread::threadMain() {
result.fir_filter = firfilt_crcf_create(h, h_len);
result.resampler = msresamp_crcf_create(result.resample_ratio, As);
result.audio_resampler = msresamp_rrrf_create(result.audio_resample_ratio, As);
result.stereo_resampler = msresamp_rrrf_create(result.audio_resample_ratio, As);
result.audioSampleRate = filterCommand.audioSampleRate;
result.bandwidth = filterCommand.bandwidth;

5
src/demod/DemodulatorWorkerThread.h
View File

@ -22,13 +22,13 @@ public:
};
DemodulatorWorkerThreadResult() :
cmd(DEMOD_WORKER_THREAD_RESULT_NULL), fir_filter(NULL), resampler(NULL), resample_ratio(0), audio_resampler(NULL), audio_resample_ratio(
cmd(DEMOD_WORKER_THREAD_RESULT_NULL), fir_filter(NULL), resampler(NULL), resample_ratio(0), audio_resampler(NULL), stereo_resampler(NULL), audio_resample_ratio(
0), inputRate(0), bandwidth(0), audioSampleRate(0) {
}
DemodulatorWorkerThreadResult(DemodulatorThreadResultEnum cmd) :
cmd(cmd), fir_filter(NULL), resampler(NULL), resample_ratio(0), audio_resampler(NULL), audio_resample_ratio(0), inputRate(0), bandwidth(
cmd(cmd), fir_filter(NULL), resampler(NULL), resample_ratio(0), audio_resampler(NULL), stereo_resampler(NULL), audio_resample_ratio(0), inputRate(0), bandwidth(
0), audioSampleRate(0) {
}
@ -39,6 +39,7 @@ public:
msresamp_crcf resampler;
float resample_ratio;
msresamp_rrrf audio_resampler;
msresamp_rrrf stereo_resampler;
float audio_resample_ratio;
unsigned int inputRate;

10
src/visual/WaterfallCanvas.cpp
View File

@ -200,6 +200,16 @@ void WaterfallCanvas::OnKeyDown(wxKeyEvent& event) {
activeDemod->squelchAuto();
}
break;
case WXK_SPACE:
if (!activeDemod) {
break;
}
if (activeDemod->isStereo()) {
activeDemod->setStereo(false);
} else {
activeDemod->setStereo(true);
}
break;
default:
event.Skip();
return;