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Wrap buffer.

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This commit is contained in:
John Greb 2014-11-11 11:56:49 +00:00
parent 84c43d517a
commit b68e76a66d
2 changed files with 5 additions and 2 deletions
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6
plugins/channel/usb/usbdemod.cpp
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@ -36,6 +36,7 @@ USBDemod::USBDemod(AudioFifo* audioFifo, SampleSink* sampleSink) :
m_audioBuffer.resize(512);
m_audioBufferFill = 0;
m_undersampleCount = 0;
m_i = 0;
USBFilter = new fftfilt(0.01, m_Bandwidth / 96000.0, USBFFTLEN);
// if (!USBFilter) segfault;
@ -98,8 +99,8 @@ void USBDemod::feed(SampleVector::const_iterator begin, SampleVector::const_iter
n_out += USBFilter->run(c, &sideband, true);
if (m_sampleRate == 64000)
n_out += USBFilter->run(c, &sideband, true);
for (int i = 0; i < n_out; i += samplestep) {
Real demod = (sideband[i].real() + sideband[i].imag()) * 32768.0;
for (m_i; m_i < n_out; m_i += samplestep) {
Real demod = (sideband[m_i].real() + sideband[m_i].imag()) * 32768.0;
// Downsample by 4x for audio display
if (!(m_undersampleCount++ & 3))
@ -114,6 +115,7 @@ void USBDemod::feed(SampleVector::const_iterator begin, SampleVector::const_iter
m_audioBufferFill = 0;
}
}
m_i -= n_out;
}
if(m_audioFifo->write((const quint8*)&m_audioBuffer[0], m_audioBufferFill, 0) != m_audioBufferFill)
;//qDebug("lost samples");

1
plugins/channel/usb/usbdemod.h
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@ -77,6 +77,7 @@ private:
int m_undersampleCount;
int m_sampleRate;
int m_frequency;
int m_i;
AudioVector m_audioBuffer;
uint m_audioBufferFill;