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G711支持多种规格

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This commit is contained in:
xiongziliang
2020-04-18 22:13:11 +08:00
parent 5c3418a412
commit bacf8f100b
17 changed files with 203 additions and 197 deletions
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59
src/Rtmp/Rtmp.cpp
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@@ -36,11 +36,68 @@ AudioMeta::AudioMeta(const AudioTrack::Ptr &audio,int datarate){
_metadata.set("audiosamplesize", audio->getAudioSampleBit());
}
if(audio->getAudioChannel() > 0){
_metadata.set("audiochannels", audio->getAudioChannel());
_metadata.set("stereo", audio->getAudioChannel() > 1);
}
_codecId = audio->getCodecId();
_metadata.set("audiocodecid", Factory::getAmfByCodecId(_codecId));
}
uint8_t getAudioRtmpFlags(const Track::Ptr &track){
switch (track->getTrackType()){
case TrackAudio : {
auto audioTrack = dynamic_pointer_cast<AudioTrack>(track);
if (!audioTrack) {
WarnL << "获取AudioTrack失败";
return 0;
}
auto iSampleRate = audioTrack->getAudioSampleRate();
auto iChannel = audioTrack->getAudioChannel();
auto iSampleBit = audioTrack->getAudioSampleBit();
uint8_t flvAudioType ;
switch (track->getCodecId()){
case CodecG711A : flvAudioType = FLV_CODEC_G711A; break;
case CodecG711U : flvAudioType = FLV_CODEC_G711U; break;
case CodecAAC : {
flvAudioType = FLV_CODEC_AAC;
//aac不通过flags获取音频相关信息
iSampleRate = 44100;
iSampleBit = 16;
iChannel = 2;
break;
}
default: WarnL << "该编码格式不支持转换为RTMP: " << track->getCodecName(); return 0;
}
uint8_t flvSampleRate;
switch (iSampleRate) {
case 44100:
flvSampleRate = 3;
break;
case 22050:
flvSampleRate = 2;
break;
case 11025:
flvSampleRate = 1;
break;
case 16000: // nellymoser only
case 8000: // nellymoser only
case 5512: // not MP3
flvSampleRate = 0;
break;
default:
WarnL << "FLV does not support sample rate " << iSampleRate << " ,choose from (44100, 22050, 11025)";
return 0;
}
uint8_t flvStereoOrMono = (iChannel > 1);
uint8_t flvSampleBit = iSampleBit == 16;
return (flvAudioType << 4) | (flvSampleRate << 2) | (flvSampleBit << 1) | flvStereoOrMono;
}
default : return 0;
}
}
}//namespace mediakit