AudioStream *AACDecoder::decodeFrame(Common::SeekableReadStream &stream) {
// read everything into a buffer
uint32 inBufferPos = 0;
uint32 inBufferSize = stream.size();
byte *inBuffer = new byte[inBufferSize];
stream.read(inBuffer, inBufferSize);
QueuingAudioStream *audioStream = makeQueuingAudioStream(_rate, _channels);
// Decode until we have enough samples (or there's no more left)
while (inBufferPos < inBufferSize) {
NeAACDecFrameInfo frameInfo;
void *decodedSamples = NeAACDecDecode(_handle, &frameInfo, inBuffer + inBufferPos, inBufferSize - inBufferPos);
if (frameInfo.error != 0)
throw Common::Exception("Failed to decode AAC frame: %s", NeAACDecGetErrorMessage(frameInfo.error));
byte *buffer = (byte *)malloc(frameInfo.samples * 2);
memcpy(buffer, decodedSamples, frameInfo.samples * 2);
byte flags = FLAG_16BITS;
#ifdef XOREOS_LITTLE_ENDIAN
flags |= FLAG_LITTLE_ENDIAN;
#endif
audioStream->queueAudioStream(makePCMStream(new Common::MemoryReadStream(buffer, frameInfo.samples * 2), _rate, flags, _channels, true), true);
inBufferPos += frameInfo.bytesconsumed;
}
return audioStream;
}
void QuickTimeAudioDecoder::init() {
Common::QuickTimeParser::init();
_audioTrackIndex = -1;
// Find an audio stream
for (uint32 i = 0; i < _tracks.size(); i++)
if (_tracks[i]->codecType == CODEC_TYPE_AUDIO && _audioTrackIndex < 0)
_audioTrackIndex = i;
// Initialize audio, if present
if (_audioTrackIndex >= 0) {
AudioSampleDesc *entry = (AudioSampleDesc *)_tracks[_audioTrackIndex]->sampleDescs[0];
if (entry->isAudioCodecSupported()) {
_audStream = makeQueuingAudioStream(entry->_sampleRate, entry->_channels == 2);
_curAudioChunk = 0;
// Make sure the bits per sample transfers to the sample size
if (entry->getCodecTag() == MKTAG('r', 'a', 'w', ' ') || entry->getCodecTag() == MKTAG('t', 'w', 'o', 's'))
_tracks[_audioTrackIndex]->sampleSize = (entry->_bitsPerSample / 8) * entry->_channels;
// Initialize the codec (if necessary)
entry->initCodec();
}
}
}
