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Crash fixes, apply FIR filter to stereo output

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This commit is contained in:
Charles J. Cliffe
2014-12-27 15:04:43 -05:00
parent 5e9414702d
commit a93deee564
8 changed files with 53 additions and 70 deletions
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src/demod/DemodulatorPreThread.cpp
+1 -30
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@@ -10,7 +10,7 @@
DemodulatorPreThread::DemodulatorPreThread(DemodulatorThreadInputQueue* pQueueIn, DemodulatorThreadPostInputQueue* pQueueOut,
DemodulatorThreadControlCommandQueue *threadQueueControl, DemodulatorThreadCommandQueue* threadQueueNotify) :
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(
1), resampler(NULL), commandQueue(NULL), audioInputQueue(NULL), threadQueueNotify(threadQueueNotify), threadQueueControl(
threadQueueControl) {
float kf = 0.5; // modulation factor
@@ -33,30 +33,7 @@ void DemodulatorPreThread::initialize() {
resample_ratio = (float) (params.bandwidth) / (float) params.inputRate;
audio_resample_ratio = (float) (params.audioSampleRate) / (float) params.bandwidth;
float fc = 0.5 * ((double) params.bandwidth / (double) params.inputRate); // filter cutoff frequency
if (fc <= 0) {
fc = 0;
}
if (fc >= 0.5) {
fc = 0.5;
}
float ft = 0.05f; // filter transition
float As = 60.0f; // stop-band attenuation [dB]
float mu = 0.0f; // fractional timing offset
// estimate required filter length and generate filter
unsigned int h_len = estimate_req_filter_len(ft, As);
float h[h_len];
liquid_firdes_kaiser(h_len, fc, As, mu, h);
if (fir_filter) {
firfilt_crcf_recreate(fir_filter, h, h_len);
} else {
fir_filter = firfilt_crcf_create(h, h_len);
}
// create multi-stage arbitrary resampler object
if (resampler) {
@@ -240,11 +217,6 @@ void DemodulatorPreThread::threadMain() {
switch (result.cmd) {
case DemodulatorWorkerThreadResult::DEMOD_WORKER_THREAD_RESULT_FILTERS:
firfilt_crcf_destroy(fir_filter);
// msresamp_crcf_destroy(resampler);
// msresamp_crcf_destroy(audio_resampler);
fir_filter = result.fir_filter;
resampler = result.resampler;
audio_resampler = result.audio_resampler;
stereo_resampler = result.stereo_resampler;
@@ -265,7 +237,6 @@ void DemodulatorPreThread::threadMain() {
while (!buffers.empty()) {
DemodulatorThreadPostIQData *iqDataDel = buffers.front();
buffers.pop_front();
std::lock_guard < std::mutex > lock(iqDataDel->m_mutex);
delete iqDataDel;
}