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FCD Streaming.

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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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plugins/samplesource/fcd/fcdsource.cpp
+16 -4
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@@ -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;
}