VE7UWU/sdrangel
1
0
Fork 0
mirror of https://github.com/f4exb/sdrangel.git synced 2024-11-14 04:11:48 -05:00
Code Issues Projects Releases Wiki Activity

Wrap buffer.

Browse Source
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
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
plugins/channel/usb/usbdemod.cpp
View File

@ -36,6 +36,7 @@ USBDemod::USBDemod(AudioFifo* audioFifo, SampleSink* sampleSink) :
m_audioBuffer.resize(512); m_audioBuffer.resize(512);
m_audioBufferFill = 0; m_audioBufferFill = 0;
m_undersampleCount = 0; m_undersampleCount = 0;
m_i = 0;
USBFilter = new fftfilt(0.01, m_Bandwidth / 96000.0, USBFFTLEN); USBFilter = new fftfilt(0.01, m_Bandwidth / 96000.0, USBFFTLEN);
// if (!USBFilter) segfault; // if (!USBFilter) segfault;
@ -98,8 +99,8 @@ void USBDemod::feed(SampleVector::const_iterator begin, SampleVector::const_iter
n_out += USBFilter->run(c, &sideband, true); n_out += USBFilter->run(c, &sideband, true);
if (m_sampleRate == 64000) if (m_sampleRate == 64000)
n_out += USBFilter->run(c, &sideband, true); n_out += USBFilter->run(c, &sideband, true);
for (int i = 0; i < n_out; i += samplestep) { for (m_i; m_i < n_out; m_i += samplestep) {
Real demod = (sideband[i].real() + sideband[i].imag()) * 32768.0; Real demod = (sideband[m_i].real() + sideband[m_i].imag()) * 32768.0;
// Downsample by 4x for audio display // Downsample by 4x for audio display
if (!(m_undersampleCount++ & 3)) if (!(m_undersampleCount++ & 3))
@ -114,6 +115,7 @@ void USBDemod::feed(SampleVector::const_iterator begin, SampleVector::const_iter
m_audioBufferFill = 0; m_audioBufferFill = 0;
} }
} }
m_i -= n_out;
} }
if(m_audioFifo->write((const quint8*)&m_audioBuffer[0], m_audioBufferFill, 0) != m_audioBufferFill) if(m_audioFifo->write((const quint8*)&m_audioBuffer[0], m_audioBufferFill, 0) != m_audioBufferFill)
;//qDebug("lost samples"); ;//qDebug("lost samples");

1
plugins/channel/usb/usbdemod.h
View File

@ -77,6 +77,7 @@ private:
int m_undersampleCount; int m_undersampleCount;
int m_sampleRate; int m_sampleRate;
int m_frequency; int m_frequency;
int m_i;
AudioVector m_audioBuffer; AudioVector m_audioBuffer;
uint m_audioBufferFill; uint m_audioBufferFill;