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only hold the threshold number of frames for audio output

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This commit is contained in:
Stephen Birarda 2013-03-11 17:27:27 -07:00
parent eaf27a942e
commit 4be337d34b
1 changed files with 15 additions and 0 deletions
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15
interface/src/Audio.cpp
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@ -193,6 +193,21 @@ int audioCallback (const void *inputBuffer,
} }
// play whatever we have in the audio buffer // play whatever we have in the audio buffer
// check if we have more than we need to play out
int thresholdFrames = ceilf((PACKET_LENGTH_SAMPLES + JITTER_BUFFER_SAMPLES) / (float)PACKET_LENGTH_SAMPLES);
int thresholdSamples = thresholdFrames * PACKET_LENGTH_SAMPLES;
if (ringBuffer->diffLastWriteNextOutput() > thresholdSamples) {
// we need to push the next output forwards
int samplesToPush = ringBuffer->diffLastWriteNextOutput() - thresholdSamples;
if (ringBuffer->getNextOutput() + samplesToPush > ringBuffer->getBuffer()) {
ringBuffer->setNextOutput(ringBuffer->getBuffer() + (samplesToPush - (ringBuffer->getBuffer() + RING_BUFFER_SAMPLES - ringBuffer->getNextOutput())));
} else {
ringBuffer->setNextOutput(ringBuffer->getNextOutput() + samplesToPush);
}
}
memcpy(outputLeft, ringBuffer->getNextOutput(), PACKET_LENGTH_BYTES_PER_CHANNEL); memcpy(outputLeft, ringBuffer->getNextOutput(), PACKET_LENGTH_BYTES_PER_CHANNEL);
memcpy(outputRight, ringBuffer->getNextOutput() + PACKET_LENGTH_SAMPLES_PER_CHANNEL, PACKET_LENGTH_BYTES_PER_CHANNEL); memcpy(outputRight, ringBuffer->getNextOutput() + PACKET_LENGTH_SAMPLES_PER_CHANNEL, PACKET_LENGTH_BYTES_PER_CHANNEL);