Commit 6a652e93 authored by Alexandre Savard's avatar Alexandre Savard
Browse files

[#3487] Improve notch filter for DC component removal

parent 99743b43
......@@ -1125,9 +1125,15 @@ void AlsaLayer::audioCallback(void)
} else {
int sampleready = AudioLayer::_echoCanceller->processAudio(in, echoCancelledMic, toPut);
SFLDataFormat* filter_out = (SFLDataFormat*) malloc (framesPerBufferAlsa * sizeof (SFLDataFormat));
_audiofilter->processAudio (in, filter_out, toPut);
int sampleready = AudioLayer::_echoCanceller->processAudio(filter_out, echoCancelledMic, toPut);
getMainBuffer()->putData (echoCancelledMic, sampleready*sizeof(SFLDataFormat), 100);
free(rsmpl_out);
}
}
......
......@@ -77,7 +77,7 @@ void DcBlocker::process (SFLDataFormat *data, int nbBytes)
int nbSamples = nbBytes / sizeof(SFLDataFormat);
for (int i = 0; i < nbSamples; i++) {
_debug("i: %d", i);
_x = data[i];
_y = (SFLDataFormat) ( (float) _x - (float) _xm1 + 0.9999 * (float) _ym1);
......@@ -89,6 +89,22 @@ void DcBlocker::process (SFLDataFormat *data, int nbBytes)
}
}
int DcBlocker::process(SFLDataFormat *inputData, SFLDataFormat *outputData, int nbBytes) { return 0;}
int DcBlocker::process(SFLDataFormat *inputData, SFLDataFormat *outputData, int nbBytes) {
int nbSamples = nbBytes / sizeof(SFLDataFormat);
for (int i = 0; i < nbSamples; i++) {
_x = inputData[i];
_y = (SFLDataFormat) ( (float) _x - (float) _xm1 + 0.9999 * (float) _ym1);
_xm1 = _x;
_ym1 = _y;
outputData[i] = _y;
}
return 0;
}
void DcBlocker::process(SFLDataFormat *micData, SFLDataFormat *spkrData, SFLDataFormat *outputData, int nbBytes) {}
......@@ -981,11 +981,18 @@ void PulseLayer::readFromMic (void)
} else {
SFLDataFormat* filter_out = (SFLDataFormat*) pa_xmalloc (r);
// remove dc offset
_audiofilter->processAudio((SFLDataFormat *)data, filter_out, r);
// echo cancellation processing
int sampleready = _echoCanceller->processAudio((SFLDataFormat *)data, echoCancelledMic, r);
int sampleready = _echoCanceller->processAudio((SFLDataFormat *)data, echoCancelledMic, r);
// no resampling required
getMainBuffer()->putData (echoCancelledMic, sampleready*sizeof (SFLDataFormat), 100);
pa_xfree(filter_out);
}
......
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