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Code Issues Releases Wiki Activity

RTC: Use FFmpeg to transcode aac to opus

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This commit is contained in:
winlin 2020-10-22 17:07:50 +08:00
parent 97880f6bb7
commit d5a0ad3dd8
3 changed files with 208 additions and 128 deletions
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27
trunk/src/app/srs_app_rtc_codec.hpp
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@ -40,8 +40,6 @@ extern "C" {
#include <libavutil/samplefmt.h>
#include <libswresample/swresample.h>
#include <opus/opus.h>
#ifdef __cplusplus
}
#endif
@ -54,9 +52,10 @@ private:
AVFrame* frame_;
AVPacket* packet_;
AVCodecContext* codec_ctx_;
std::string codec_name_;
SrsAudioCodecId codec_id_;
public:
SrsAudioDecoder(std::string codec);
//Only support "aac","opus"
SrsAudioDecoder(SrsAudioCodecId codec);
virtual ~SrsAudioDecoder();
srs_error_t initialize();
virtual srs_error_t decode(SrsSample *pkt, char *buf, int &size);
@ -66,16 +65,22 @@ public:
class SrsAudioEncoder
{
private:
int inband_fec_;
int channels_;
int sampling_rate_;
int complexity_;
OpusEncoder *opus_;
AVCodecContext* codec_ctx_;
SrsAudioCodecId codec_id_;
int want_bytes_;
AVFrame* frame_;
public:
SrsAudioEncoder(int samplerate, int channels, int fec, int complexity);
//Only support "aac","opus"
SrsAudioEncoder(SrsAudioCodecId codec, int samplerate, int channelsy);
virtual ~SrsAudioEncoder();
srs_error_t initialize();
//The encoder wanted bytes to call encode, if > 0, caller must feed the same bytes
//Call after initialize successed
int want_bytes();
virtual srs_error_t encode(SrsSample *frame, char *buf, int &size);
AVCodecContext* codec_ctx();
};
class SrsAudioResample
@ -107,6 +112,7 @@ public:
virtual srs_error_t resample(SrsSample *pcm, char *buf, int &size);
};
// TODO: FIXME: Rename to Transcoder.
class SrsAudioRecode
{
private:
@ -117,8 +123,11 @@ private:
int dst_samplerate_;
int size_;
char *data_;
SrsAudioCodecId src_codec_;
SrsAudioCodecId dst_codec_;
int enc_want_bytes_;
public:
SrsAudioRecode(int channels, int samplerate);
SrsAudioRecode(SrsAudioCodecId src_codec, SrsAudioCodecId dst_codec,int channels, int samplerate);
virtual ~SrsAudioRecode();
srs_error_t initialize();
virtual srs_error_t transcode(SrsSample *pkt, char **buf, int *buf_len, int &n);