int MediaEngine::getAudioSamples(u8* buffer) {
if (!m_demux) {
return 0;
}
u8 *audioFrame = 0;
int headerCode1, headerCode2;
int frameSize = m_demux->getNextaudioFrame(&audioFrame, &headerCode1, &headerCode2);
if (frameSize == 0) {
m_noAudioData = true;
return 0;
}
int outbytes = 0;
if (m_audioContext != NULL) {
if (!AT3Decode(m_audioContext, audioFrame, frameSize, &outbytes, buffer)) {
ERROR_LOG(ME, "AT3 decode failed during video playback");
}
}
if (headerCode1 == 0x24) {
// it a mono atrac3plus, convert it to stereo
s16 *outbuf = (s16*)buffer;
s16 *inbuf = (s16*)buffer;
for (int i = 0x800 - 1; i >= 0; i--) {
s16 sample = inbuf[i];
outbuf[i * 2] = sample;
outbuf[i * 2 + 1] = sample;
}
}
m_audiopts += 4180;
m_noAudioData = false;
return 0x2000;
}
int MediaEngine::getAudioSamples(u32 bufferPtr) {
if (!Memory::IsValidAddress(bufferPtr)) {
ERROR_LOG_REPORT(ME, "Ignoring bad audio decode address %08x during video playback", bufferPtr);
}
u8 *buffer = Memory::GetPointer(bufferPtr);
if (!m_demux) {
return 0;
}
// Demux now (rather than on add data) so that we select the right stream.
m_demux->demux(m_audioStream);
u8 *audioFrame = 0;
int headerCode1, headerCode2;
int frameSize = m_demux->getNextaudioFrame(&audioFrame, &headerCode1, &headerCode2);
if (frameSize == 0) {
m_noAudioData = true;
return 0;
}
int outbytes = 0;
if (m_audioContext != NULL) {
if (!AT3Decode(m_audioContext, audioFrame, frameSize, &outbytes, buffer)) {
ERROR_LOG(ME, "AT3 decode failed during video playback");
}
}
if (headerCode1 == 0x24) {
// it a mono atrac3plus, convert it to stereo
s16 *outbuf = (s16*)buffer;
s16 *inbuf = (s16*)buffer;
for (int i = 0x800 - 1; i >= 0; i--) {
s16 sample = inbuf[i];
outbuf[i * 2] = sample;
outbuf[i * 2 + 1] = sample;
}
}
m_audiopts += 4180;
m_noAudioData = false;
return 0x2000;
}
