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#include "MKVAACDecoder.h"
#include <math.h>
#include "../nsutil/pcm.h"
MKVAACDecoder::MKVAACDecoder(unsigned int bps, bool floating_point)
: bps(bps), floating_point(floating_point)
{
}
MKVAACDecoder *MKVAACDecoder::Create(const nsmkv::TrackEntryData *track_entry_data, const nsmkv::AudioData *audio_data, unsigned int preferred_bits, unsigned int max_channels, bool floating_point)
{
if (!floating_point)
{
if (preferred_bits >= 24)
preferred_bits=24;
else
preferred_bits=16;
}
/*if (!max_channels)
max_channels = 8;*/
if (track_entry_data->codec_private && track_entry_data->codec_private_len)
{
MKVAACDecoder *decoder = new MKVAACDecoder(preferred_bits, floating_point);
if (decoder && SUCCEEDED(decoder->decoder.Open(track_entry_data->codec_private, track_entry_data->codec_private_len))) {
return decoder;
}
delete decoder;
}
return 0;
}
int MKVAACDecoder::GetOutputProperties(unsigned int *sampleRate, unsigned int *channels, unsigned int *bitsPerSample, bool *isFloat)
{
uint32_t local_sample_rate, local_channels;
HRESULT hr = decoder.GetOutputProperties(&local_sample_rate, &local_channels);
if (FAILED(hr)) {
return MKV_FAILURE;
}
*sampleRate = local_sample_rate;
*channels = local_channels;
*bitsPerSample = bps;
*isFloat = floating_point;
return MKV_SUCCESS;
}
void MKVAACDecoder::Flush()
{
decoder.Flush();
}
int MKVAACDecoder::OutputFrameSize(size_t *frame_size)
{
size_t local_frame_size;
if (FAILED(decoder.OutputBlockSizeSamples(&local_frame_size))) {
return MKV_FAILURE;
}
*frame_size = local_frame_size;
return MKV_SUCCESS;
}
void MKVAACDecoder::Close()
{
delete this;
}
int MKVAACDecoder::DecodeBlock(void *inputBuffer, size_t inputBufferBytes, void *outputBuffer, size_t *outputBufferBytes)
{
decoder.Feed(inputBuffer, inputBufferBytes);
decoder.Decode(outputBuffer, outputBufferBytes, bps, false, 1.0);
return MKV_SUCCESS;
}
void MKVAACDecoder::EndOfStream()
{
decoder.Feed(0, 0);
}
#define CBCLASS MKVAACDecoder
START_DISPATCH;
CB(OUTPUT_FRAME_SIZE, OutputFrameSize)
CB(GET_OUTPUT_PROPERTIES, GetOutputProperties)
CB(DECODE_BLOCK, DecodeBlock)
VCB(FLUSH, Flush)
VCB(CLOSE, Close)
VCB(END_OF_STREAM, EndOfStream)
END_DISPATCH;
#undef CBCLASS
int MKVDecoder::CreateAudioDecoder(const char *codec_id, const nsmkv::TrackEntryData *track_entry_data, const nsmkv::AudioData *audio_data, unsigned int preferred_bits, unsigned int max_channels,bool floating_point, ifc_mkvaudiodecoder **decoder)
{
if (!strcmp(codec_id, "A_AAC"))
{
MKVAACDecoder *aac_decoder = MKVAACDecoder::Create(track_entry_data, audio_data, preferred_bits, max_channels, floating_point);
if (aac_decoder)
{
*decoder = aac_decoder;
return CREATEDECODER_SUCCESS;
}
return CREATEDECODER_FAILURE;
}
return CREATEDECODER_NOT_MINE;
}
#define CBCLASS MKVDecoder
START_DISPATCH;
CB(CREATE_AUDIO_DECODER, CreateAudioDecoder)
END_DISPATCH;
#undef CBCLASS
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