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#include "FLVAACDecoder.h"
#include <math.h>
#include "../nsutil/pcm.h"
int FLVDecoder::CreateAudioDecoder(int stereo, int bits, int sample_rate, int format_type, ifc_flvaudiodecoder **decoder)
{
if (format_type == FLV::AUDIO_FORMAT_AAC)
{
FLVAAC *aac = new FLVAAC();
if (!aac)
{
return CREATEDECODER_FAILURE;
}
*decoder = aac;
return CREATEDECODER_SUCCESS;
}
return CREATEDECODER_NOT_MINE;
}
int FLVDecoder::HandlesAudio(int format_type)
{
if (format_type == FLV::AUDIO_FORMAT_AAC)
{
return CREATEDECODER_SUCCESS;
}
return CREATEDECODER_NOT_MINE;
}
#define CBCLASS FLVDecoder
START_DISPATCH;
CB(CREATE_AUDIO_DECODER, CreateAudioDecoder)
CB(HANDLES_AUDIO, HandlesAudio)
END_DISPATCH;
#undef CBCLASS
/* --- */
FLVAAC::FLVAAC()
{
bps = 16;
preDelay=0;
got_decoder_config = false;
}
int FLVAAC::GetOutputFormat(unsigned int *sample_rate, unsigned int *channels, unsigned int *_bits)
{
uint32_t local_sample_rate, local_channels;
HRESULT hr = decoder.GetOutputProperties(&local_sample_rate, &local_channels);
if (FAILED(hr)) {
return FLV_AUDIO_FAILURE;
}
*sample_rate = local_sample_rate;
*channels = local_channels;
*_bits = bps;
return FLV_AUDIO_SUCCESS;
}
int FLVAAC::DecodeSample(const void *input_buffer, size_t input_buffer_bytes, void *samples, size_t *samples_size_bytes, double *bitrate)
{
const uint8_t *type = (const uint8_t *)input_buffer;
if (type[0] == 0)
{
decoder.Open(type+1, input_buffer_bytes-1);
got_decoder_config=true;
*samples_size_bytes=0;
return FLV_AUDIO_SUCCESS;
return FLV_AUDIO_FAILURE;
}
else if (type[0] == 1)
{
decoder.Feed(input_buffer, input_buffer_bytes);
decoder.Decode(samples, samples_size_bytes, bps, false, 1.0);
*bitrate = 0;
return FLV_AUDIO_SUCCESS;
}
else
return FLV_AUDIO_FAILURE;
}
void FLVAAC::Flush()
{
decoder.Flush();
}
void FLVAAC::Close()
{
delete this;
}
int FLVAAC::Ready()
{
return !!got_decoder_config;
}
void FLVAAC::SetPreferences(unsigned int _max_channels, unsigned int preferred_bits)
{
if (preferred_bits)
bps = preferred_bits;
// TODO: max channels
}
#define CBCLASS FLVAAC
START_DISPATCH;
CB(FLV_AUDIO_GETOUTPUTFORMAT, GetOutputFormat)
CB(FLV_AUDIO_DECODE, DecodeSample)
VCB(FLV_AUDIO_FLUSH, Flush)
VCB(FLV_AUDIO_CLOSE, Close)
CB(FLV_AUDIO_READY, Ready)
VCB(FLV_AUDIO_SETPREFERENCES, SetPreferences)
END_DISPATCH;
#undef CBCLASS
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