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