winamp/Src/aacdec-mft/AVIAACDecoder.cpp

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2024-09-24 12:54:57 +00:00
#include "AVIAACDecoder.h"
#include <math.h>
#include "../nsutil/pcm.h"
int AVIDecoder::CreateAudioDecoder(const nsavi::AVIH *avi_header,
const nsavi::STRH *stream_header, const nsavi::STRF *stream_format, const nsavi::STRD *stream_data,
unsigned int preferred_bits, unsigned int max_channels, bool floating_point,
ifc_aviaudiodecoder **decoder)
{
nsavi::audio_format *waveformat = (nsavi::audio_format *)stream_format;
if (waveformat->format == nsavi::audio_format_aac)
{
AVIAACDecoder *aac_decoder = AVIAACDecoder::Create(waveformat, preferred_bits, max_channels, floating_point);
if (aac_decoder)
{
*decoder = aac_decoder;
return CREATEDECODER_SUCCESS;
}
return CREATEDECODER_SUCCESS;
}
return CREATEDECODER_NOT_MINE;
}
#define CBCLASS AVIDecoder
START_DISPATCH;
CB(CREATE_AUDIO_DECODER, CreateAudioDecoder)
END_DISPATCH;
#undef CBCLASS
AVIAACDecoder *AVIAACDecoder::Create(const nsavi::audio_format *waveformat, 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 (waveformat->extra_size_bytes)
{
AVIAACDecoder * decoder = new AVIAACDecoder(preferred_bits, floating_point);
if (decoder && SUCCEEDED(decoder->decoder.Open((const unsigned char *)(waveformat + 1), waveformat->extra_size_bytes))) {
return decoder;
}
delete decoder;
}
return 0;
}
AVIAACDecoder::AVIAACDecoder(unsigned int bps, bool floating_point)
: bps(bps), floating_point(floating_point)
{
}
int AVIAACDecoder::OutputFrameSize(size_t *frame_size)
{
size_t local_frame_size;
if (FAILED(decoder.OutputBlockSizeSamples(&local_frame_size))) {
return AVI_FAILURE;
}
*frame_size = local_frame_size;
return AVI_SUCCESS;
}
int AVIAACDecoder::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 AVI_FAILURE;
}
*sampleRate = local_sample_rate;
*channels = local_channels;
*bitsPerSample = bps;
*isFloat = floating_point;
return AVI_SUCCESS;
}
int AVIAACDecoder::DecodeChunk(uint16_t type, void **inputBuffer, size_t *inputBufferBytes, void *outputBuffer, size_t *outputBufferBytes)
{
if (SUCCEEDED(decoder.Feed(*inputBuffer, *inputBufferBytes))
&& SUCCEEDED(decoder.Decode(outputBuffer, outputBufferBytes, bps, false, 1.0))) {
*inputBufferBytes = 0;
return AVI_SUCCESS;
}
return AVI_FAILURE;
}
void AVIAACDecoder::Flush()
{
decoder.Flush();
}
void AVIAACDecoder::Close()
{
delete this;
}
#define CBCLASS AVIAACDecoder
START_DISPATCH;
CB(OUTPUT_FRAME_SIZE, OutputFrameSize)
CB(GET_OUTPUT_PROPERTIES, GetOutputProperties)
CB(DECODE_CHUNK, DecodeChunk)
VCB(FLUSH, Flush)
VCB(CLOSE, Close)
END_DISPATCH;
#undef CBCLASS