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FCD Streaming.

This commit is contained in:
John Greb 2014-12-01 16:56:27 +00:00
parent 46dcbe6db7
commit 21578a555e
3 changed files with 20 additions and 7 deletions
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20
plugins/samplesource/fcd/fcdsource.cpp
View File

@ -7,16 +7,27 @@
bool FCDThread::OpenSource(const char* cardname)
{
snd_pcm_hw_params_t* params;
//fcd_rate = FCDPP_RATE;
//fcd_channels =2;
//fcd_format = SND_PCM_SFMT_U16_LE;
fcd_stream = SND_PCM_STREAM_PLAYBACK;
snd_pcm_stream_t fcd_stream = SND_PCM_STREAM_CAPTURE;
if (fcd_handle)
return false;
if ( snd_pcm_open( &fcd_handle, cardname, fcd_stream, 1 ) < 0 )
if ( snd_pcm_open( &fcd_handle, cardname, fcd_stream, 0 ) < 0 )
return false;
snd_pcm_hw_params_alloca(&params);
if ( snd_pcm_hw_params_any(fcd_handle, params) < 0 )
qCritical("Funcube Dongle read settings failed");
else if ( snd_pcm_hw_params(fcd_handle, params) < 0 )
qCritical("Funcube Dongle write settings failed");
// TODO: check actual samplerate, may be crippled firmware
if ( snd_pcm_start(fcd_handle) < 0 )
qCritical("Funcube Dongle stream start failed");
else qDebug("Funcube stream started");
return true;
}
@ -32,7 +43,7 @@ void FCDThread::set_center_freq(double freq)
//TODO
}
void FCDThread::work(int n_items)
int FCDThread::work(int n_items)
{
int l;
SampleVector::iterator it;
@ -40,9 +51,10 @@ void FCDThread::work(int n_items)
it = m_convertBuffer.begin();
out = (void *)&it[0];
l = snd_pcm_readi(fcd_handle, out, (snd_pcm_uframes_t)n_items);
l = snd_pcm_mmap_readi(fcd_handle, out, (snd_pcm_uframes_t)n_items);
if (l > 0)
m_sampleFifo->write(it, it + l);
return l;
}

4
plugins/samplesource/fcd/fcdthread.cpp
View File

@ -44,9 +44,11 @@ void FCDThread::run()
m_running = true;
if ( !OpenSource("hw:CARD=V20") )
return;
// TODO: fallback to original fcd
while(m_running) {
work(BLOCKSIZE);
if ( work(BLOCKSIZE) < 0)
break;
}
CloseSource();
}

3
plugins/samplesource/fcd/fcdthread.h
View File

@ -39,11 +39,10 @@ public:
bool OpenSource(const char *filename);
void CloseSource();
void set_center_freq(double freq);
void work(int n_items);
int work(int n_items);
private:
snd_pcm_format_t fcd_format;
snd_pcm_t* fcd_handle = NULL;
snd_pcm_stream_t fcd_stream;
QMutex m_startWaitMutex;
QWaitCondition m_startWaiter;