mirror of
https://github.com/WinampDesktop/winamp.git
synced 2024-11-28 00:40:49 +01:00
88 lines
2.4 KiB
C++
88 lines
2.4 KiB
C++
#include "avi_pcm_decoder.h"
|
|
#include "avi_alaw_decoder.h"
|
|
#include "avi_ulaw_decoder.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_pcm || waveformat->format == nsavi::audio_format_extensible)
|
|
{
|
|
*decoder = new AVIPCMDecoder(waveformat);
|
|
return CREATEDECODER_SUCCESS;
|
|
}
|
|
else if (waveformat->format == nsavi::audio_format_alaw)
|
|
{
|
|
*decoder = new AVIALawDecoder(waveformat);
|
|
return CREATEDECODER_SUCCESS;
|
|
}
|
|
else if (waveformat->format == nsavi::audio_format_ulaw)
|
|
{
|
|
*decoder = new AVIULawDecoder(waveformat);
|
|
return CREATEDECODER_SUCCESS;
|
|
}
|
|
|
|
return CREATEDECODER_NOT_MINE;
|
|
|
|
}
|
|
|
|
#define CBCLASS AVIDecoder
|
|
START_DISPATCH;
|
|
CB(CREATE_AUDIO_DECODER, CreateAudioDecoder)
|
|
END_DISPATCH;
|
|
#undef CBCLASS
|
|
|
|
AVIPCMDecoder::AVIPCMDecoder(const nsavi::audio_format *waveformat) : waveformat(waveformat)
|
|
{
|
|
}
|
|
|
|
int AVIPCMDecoder::OutputFrameSize(size_t *frame_size)
|
|
{
|
|
*frame_size = waveformat->block_align; // TODO
|
|
return AVI_SUCCESS;
|
|
}
|
|
|
|
int AVIPCMDecoder::GetOutputProperties(unsigned int *sampleRate, unsigned int *channels, unsigned int *bitsPerSample, bool *isFloat)
|
|
{
|
|
if (waveformat)
|
|
{
|
|
*sampleRate = waveformat->sample_rate;
|
|
*channels = waveformat->channels;
|
|
*bitsPerSample = waveformat->bits_per_sample;
|
|
*isFloat = false; // TODO
|
|
return AVI_SUCCESS;
|
|
}
|
|
else
|
|
{
|
|
return AVI_FAILURE;
|
|
}
|
|
}
|
|
|
|
int AVIPCMDecoder::DecodeChunk(uint16_t type, void **inputBuffer, size_t *inputBufferBytes, void *outputBuffer, size_t *outputBufferBytes)
|
|
{
|
|
size_t copy_size = min(*inputBufferBytes, *outputBufferBytes);
|
|
int remainder = copy_size % waveformat->block_align;
|
|
copy_size -= remainder;
|
|
memcpy(outputBuffer, *inputBuffer, copy_size);
|
|
*inputBuffer = (uint8_t *)(*inputBuffer) + copy_size;
|
|
*inputBufferBytes = *inputBufferBytes - copy_size;
|
|
*outputBufferBytes = copy_size;
|
|
return AVI_SUCCESS;
|
|
}
|
|
|
|
void AVIPCMDecoder::Close()
|
|
{
|
|
delete this;
|
|
}
|
|
|
|
#define CBCLASS AVIPCMDecoder
|
|
START_DISPATCH;
|
|
CB(OUTPUT_FRAME_SIZE, OutputFrameSize)
|
|
CB(GET_OUTPUT_PROPERTIES, GetOutputProperties)
|
|
CB(DECODE_CHUNK, DecodeChunk)
|
|
VCB(CLOSE, Close)
|
|
END_DISPATCH;
|
|
#undef CBCLASS |