/// ±àÂë
int32_t CAacDecoder::Decodec(const char* pSrcBuffer, uint32_t nSrcBuffSize,
char* pDestBuffer, uint32_t nDestBufferSize)
{
int32_t nResult = 0;
if(NULL != m_hHandleDecoder)
{
if(!m_bIsInitDec)
{
unsigned long nSamplesRate = 0;
unsigned char nChannel = 0;
faacDecInit(m_hHandleDecoder, (unsigned char*)pSrcBuffer, nSrcBuffSize,
&nSamplesRate, &nChannel);
m_bIsInitDec = TRUE;
}
if(m_bIsInitDec)
{
char* pSampleBuffer = (char*)NeAACDecDecode2(m_hHandleDecoder, &m_aacFrameInfo,
(unsigned char*)pSrcBuffer, nSrcBuffSize, (void**)&pDestBuffer, nDestBufferSize);
if(NULL != pSampleBuffer
&& m_aacFrameInfo.error == 0
&& m_aacFrameInfo.samples > 0)
{
nResult = m_aacFrameInfo.samples * m_aacFrameInfo.channels;
if(nResult > nDestBufferSize)
{
nResult = 0;
}
}
}
}
return nResult;
}
static int aacd_faad_decode( AACDCommonInfo *cinfo, void *ext, unsigned char *buffer, unsigned long buffer_size, jshort *jsamples, jint outLen )
{
NeAACDecFrameInfo frame;
jshort *ljsamples = jsamples;
NeAACDecDecode2( ext, &frame, buffer, buffer_size, (void**)&jsamples, outLen*2 );
if (ljsamples != jsamples) {
AACD_WARN( "NeAACDecDecode CHANGE jsamples !!!");
}
cinfo->frame_bytesconsumed = frame.bytesconsumed;
cinfo->frame_samples = frame.samples;
if (frame.error != 0)
{
AACD_ERROR( "NeAACDecDecode bytesleft=%d, error: %s",
buffer_size,
NeAACDecGetErrorMessage(frame.error));
}
return frame.error;
}
DecoderStatus AacDecoder::process(Packet*packet){
FXlong fs = packet->stream_position;
FXbool eos = packet->flags&FLAG_EOS;
long unsigned int samplerate;
FXuchar channels;
NeAACDecFrameInfo frame;
if (packet->flags&AAC_FLAG_CONFIG) {
handle = NeAACDecOpen();
if (NeAACDecInit2(handle,packet->data(),packet->size(),&samplerate,&channels)<0){
packet->unref();
return DecoderError;
}
return DecoderOk;
}
else {
buffer.append(packet->data(),packet->size());
packet->unref();
if (handle==NULL) {
handle = NeAACDecOpen();
long n = NeAACDecInit(handle,buffer.data(),buffer.size(),&samplerate,&channels);
if (n<0) return DecoderError;
else if (n>0) buffer.readBytes(n);
af.set(AP_FORMAT_S16,samplerate,channels);
engine->output->post(new ConfigureEvent(af,Codec::AAC));
}
}
if (buffer.size()<FAAD_MIN_STREAMSIZE*2) {
return DecoderOk;
}
do {
if (out==NULL){
out = engine->decoder->get_output_packet();
if (out==NULL) return DecoderInterrupted;
out->af = af;
out->stream_position = fs;
out->stream_length = packet->stream_length;
}
void * outbuffer = out->ptr();
NeAACDecDecode2(handle,&frame,buffer.data(),buffer.size(),&outbuffer,out->availableFrames()*out->af.framesize());
if (frame.bytesconsumed>0) {
buffer.readBytes(frame.bytesconsumed);
}
if (frame.error > 0) {
GM_DEBUG_PRINT("[aac] error %d (%ld): %s\n",frame.error,frame.bytesconsumed,faacDecGetErrorMessage(frame.error));
}
if (frame.samples) {
fs+=(frame.samples/frame.channels);
out->wroteFrames((frame.samples/frame.channels));
if (out->availableFrames()==0) {
engine->output->post(out);
out=NULL;
}
}
}
while(buffer.size()>(2*FAAD_MIN_STREAMSIZE) && frame.bytesconsumed);
if (eos) {
if (out) {
engine->output->post(out);
out=NULL;
}
engine->output->post(new ControlEvent(End,packet->stream));
}
return DecoderOk;
}
SINT SoundSourceM4A::readSampleFrames(
SINT numberOfFrames, CSAMPLE* sampleBuffer) {
DEBUG_ASSERT(isValidFrameIndex(m_curFrameIndex));
const SINT numberOfFramesTotal = math_min(
numberOfFrames, getMaxFrameIndex() - m_curFrameIndex);
const SINT numberOfSamplesTotal = frames2samples(numberOfFramesTotal);
CSAMPLE* pSampleBuffer = sampleBuffer;
SINT numberOfSamplesRemaining = numberOfSamplesTotal;
while (0 < numberOfSamplesRemaining) {
if (!m_sampleBuffer.isEmpty()) {
// Consume previously decoded sample data
const SampleBuffer::ReadableChunk readableChunk(
m_sampleBuffer.readFromHead(numberOfSamplesRemaining));
if (pSampleBuffer) {
SampleUtil::copy(pSampleBuffer, readableChunk.data(), readableChunk.size());
pSampleBuffer += readableChunk.size();
}
m_curFrameIndex += samples2frames(readableChunk.size());
DEBUG_ASSERT(isValidFrameIndex(m_curFrameIndex));
DEBUG_ASSERT(numberOfSamplesRemaining >= readableChunk.size());
numberOfSamplesRemaining -= readableChunk.size();
if (0 == numberOfSamplesRemaining) {
break; // exit loop
}
}
// All previously decoded sample data has been consumed now
DEBUG_ASSERT(m_sampleBuffer.isEmpty());
if (0 == m_inputBufferLength) {
// Fill input buffer from file
if (isValidSampleBlockId(m_curSampleBlockId)) {
// Read data for next sample block into input buffer
u_int8_t* pInputBuffer = &m_inputBuffer[0];
u_int32_t inputBufferLength = m_inputBuffer.size(); // in/out parameter
if (!MP4ReadSample(m_hFile, m_trackId, m_curSampleBlockId,
&pInputBuffer, &inputBufferLength,
NULL, NULL, NULL, NULL)) {
qWarning()
<< "Failed to read MP4 input data for sample block"
<< m_curSampleBlockId << "(" << "min ="
<< kSampleBlockIdMin << "," << "max ="
<< m_maxSampleBlockId << ")";
break; // abort
}
++m_curSampleBlockId;
m_inputBufferLength = inputBufferLength;
m_inputBufferOffset = 0;
}
}
DEBUG_ASSERT(0 <= m_inputBufferLength);
if (0 == m_inputBufferLength) {
break; // EOF
}
// NOTE(uklotzde): The sample buffer for NeAACDecDecode2 has to
// be big enough for a whole block of decoded samples, which
// contains up to kFramesPerSampleBlock frames. Otherwise
// we need to use a temporary buffer.
CSAMPLE* pDecodeBuffer; // in/out parameter
SINT decodeBufferCapacity;
const SINT decodeBufferCapacityMin = frames2samples(kFramesPerSampleBlock);
if (pSampleBuffer && (decodeBufferCapacityMin <= numberOfSamplesRemaining)) {
// Decode samples directly into sampleBuffer
pDecodeBuffer = pSampleBuffer;
decodeBufferCapacity = numberOfSamplesRemaining;
} else {
// Decode next sample block into temporary buffer
const SINT writeToTailCount = math_max(
numberOfSamplesRemaining, decodeBufferCapacityMin);
const SampleBuffer::WritableChunk writableChunk(
m_sampleBuffer.writeToTail(writeToTailCount));
pDecodeBuffer = writableChunk.data();
decodeBufferCapacity = writableChunk.size();
}
DEBUG_ASSERT(decodeBufferCapacityMin <= decodeBufferCapacity);
NeAACDecFrameInfo decFrameInfo;
void* pDecodeResult = NeAACDecDecode2(
m_hDecoder, &decFrameInfo,
&m_inputBuffer[m_inputBufferOffset],
m_inputBufferLength,
reinterpret_cast<void**>(&pDecodeBuffer),
decodeBufferCapacity * sizeof(*pDecodeBuffer));
// Verify the decoding result
if (0 != decFrameInfo.error) {
qWarning() << "AAC decoding error:"
<< decFrameInfo.error
<< NeAACDecGetErrorMessage(decFrameInfo.error)
<< getUrlString();
break; // abort
}
DEBUG_ASSERT(pDecodeResult == pDecodeBuffer); // verify the in/out parameter
// Verify the decoded sample data for consistency
if (getChannelCount() != decFrameInfo.channels) {
qWarning() << "Corrupt or unsupported AAC file:"
<< "Unexpected number of channels" << decFrameInfo.channels
<< "<>" << getChannelCount();
break; // abort
}
if (getFrameRate() != SINT(decFrameInfo.samplerate)) {
qWarning() << "Corrupt or unsupported AAC file:"
<< "Unexpected sample rate" << decFrameInfo.samplerate
<< "<>" << getFrameRate();
break; // abort
}
// Consume input data
m_inputBufferLength -= decFrameInfo.bytesconsumed;
m_inputBufferOffset += decFrameInfo.bytesconsumed;
// Consume decoded output data
const SINT numberOfSamplesDecoded = decFrameInfo.samples;
DEBUG_ASSERT(numberOfSamplesDecoded <= decodeBufferCapacity);
SINT numberOfSamplesRead;
if (pDecodeBuffer == pSampleBuffer) {
numberOfSamplesRead = math_min(numberOfSamplesDecoded, numberOfSamplesRemaining);
pSampleBuffer += numberOfSamplesRead;
} else {
m_sampleBuffer.readFromTail(decodeBufferCapacity - numberOfSamplesDecoded);
const SampleBuffer::ReadableChunk readableChunk(
m_sampleBuffer.readFromHead(numberOfSamplesRemaining));
numberOfSamplesRead = readableChunk.size();
if (pSampleBuffer) {
SampleUtil::copy(pSampleBuffer, readableChunk.data(), numberOfSamplesRead);
pSampleBuffer += numberOfSamplesRead;
}
}
// The decoder might decode more samples than actually needed
// at the end of the file! When the end of the file has been
// reached decoding can be restarted by seeking to a new
// position.
DEBUG_ASSERT(numberOfSamplesDecoded >= numberOfSamplesRead);
m_curFrameIndex += samples2frames(numberOfSamplesRead);
DEBUG_ASSERT(isValidFrameIndex(m_curFrameIndex));
DEBUG_ASSERT(numberOfSamplesRemaining >= numberOfSamplesRead);
numberOfSamplesRemaining -= numberOfSamplesRead;
}
DEBUG_ASSERT(isValidFrameIndex(m_curFrameIndex));
DEBUG_ASSERT(numberOfSamplesTotal >= numberOfSamplesRemaining);
return samples2frames(numberOfSamplesTotal - numberOfSamplesRemaining);
}
