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This commit is contained in:
Jef 2024-09-24 14:54:57 +02:00
parent 537bcbc862
commit fc06254474
16440 changed files with 4239995 additions and 2 deletions
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88
Src/pcm/avi_pcm_decoder.cpp Normal file
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#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