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cleanup writing of silent frame to ring buffer

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This commit is contained in:
Stephen Birarda 2014-03-18 11:12:36 -07:00
parent b6a41eeaaa
commit 7ed982a073
1 changed files with 12 additions and 10 deletions
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22
libraries/audio/src/AudioRingBuffer.cpp
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@ -157,16 +157,18 @@ unsigned int AudioRingBuffer::samplesAvailable() const {
} }
void AudioRingBuffer::addSilentFrame(int numSilentSamples) { void AudioRingBuffer::addSilentFrame(int numSilentSamples) {
// setup the silent frame // memset zeroes into the buffer, accomodate a wrap around the end
int numSilentBytes = numSilentSamples * sizeof(int16_t); // push the _endOfLastWrite to the correct spot
char* silentFrame = new char[numSilentBytes]; if (_endOfLastWrite + numSilentSamples <= _buffer + _sampleCapacity) {
memset(silentFrame, 0, numSilentBytes); memset(_endOfLastWrite, 0, numSilentSamples * sizeof(int16_t));
_endOfLastWrite += numSilentSamples;
// write it } else {
writeData(silentFrame, numSilentBytes); int numSamplesToEnd = (_buffer + _sampleCapacity) - _endOfLastWrite;
memset(_endOfLastWrite, 0, numSilentSamples * sizeof(int16_t));
// delete the temporary silent frame memset(_buffer, 0, (numSilentSamples - numSamplesToEnd) * sizeof(int16_t));
delete[] silentFrame;
_endOfLastWrite = _buffer + (numSilentSamples - numSamplesToEnd);
}
} }
bool AudioRingBuffer::isNotStarvedOrHasMinimumSamples(unsigned int numRequiredSamples) const { bool AudioRingBuffer::isNotStarvedOrHasMinimumSamples(unsigned int numRequiredSamples) const {