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Decode directly into the audio renderer's buffer to avoid a copy

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This commit is contained in:
Cameron Gutman 2019-05-01 21:27:41 -07:00
commit 21f2b1224a
9 changed files with 70 additions and 63 deletions
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19
app/streaming/audio/audio.cpp
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@ -143,19 +143,22 @@ void Session::arDecodeAndPlaySample(char* sampleData, int sampleLength)
s_ActiveSession->m_AudioSampleCount++;
if (s_ActiveSession->m_AudioRenderer != nullptr) {
int desiredSize = sizeof(short) * SAMPLES_PER_FRAME * s_ActiveSession->m_AudioConfig.channelCount;
void* buffer = s_ActiveSession->m_AudioRenderer->getAudioBuffer(&desiredSize);
if (buffer == nullptr) {
return;
}
samplesDecoded = opus_multistream_decode(s_ActiveSession->m_OpusDecoder,
(unsigned char*)sampleData,
sampleLength,
s_ActiveSession->m_OpusDecodeBuffer,
SAMPLES_PER_FRAME,
(short*)buffer,
desiredSize / sizeof(short) / s_ActiveSession->m_AudioConfig.channelCount,
0);
if (samplesDecoded > 0) {
if (!s_ActiveSession->m_AudioRenderer->submitAudio(s_ActiveSession->m_OpusDecodeBuffer,
static_cast<int>(
sizeof(short) *
samplesDecoded *
s_ActiveSession->m_AudioConfig.channelCount))) {
SDL_assert(desiredSize >= sizeof(short) * samplesDecoded * s_ActiveSession->m_AudioConfig.channelCount);
desiredSize = sizeof(short) * samplesDecoded * s_ActiveSession->m_AudioConfig.channelCount;
if (!s_ActiveSession->m_AudioRenderer->submitAudio(desiredSize)) {
SDL_LogWarn(SDL_LOG_CATEGORY_APPLICATION,
"Reinitializing audio renderer after failure");