137 lines
4.5 KiB
C++
137 lines
4.5 KiB
C++
/*
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* Copyright (c) 2016 The ZLMediaKit project authors. All Rights Reserved.
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*
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* This file is part of ZLMediaKit(https://github.com/xiongziliang/ZLMediaKit).
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*
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* Use of this source code is governed by MIT license that can be found in the
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* LICENSE file in the root of the source tree. All contributing project authors
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* may be found in the AUTHORS file in the root of the source tree.
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*/
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#include "RtmpDemuxer.h"
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#include "Extension/Factory.h"
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namespace mediakit {
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bool RtmpDemuxer::loadMetaData(const AMFValue &val){
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bool ret = false;
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try {
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int audiosamplerate = 0;
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int audiochannels = 0;
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int audiosamplesize = 0;
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const AMFValue *audiocodecid = nullptr;
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const AMFValue *videocodecid = nullptr;
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val.object_for_each([&](const string &key, const AMFValue &val) {
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if (key == "duration") {
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_fDuration = val.as_number();
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return;
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}
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if (key == "audiosamplerate") {
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audiosamplerate = val.as_integer();
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return;
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}
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if (key == "audiosamplesize") {
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audiosamplesize = val.as_integer();
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return;
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}
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if (key == "stereo") {
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audiochannels = val.as_boolean() ? 2 : 1;
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return;
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}
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if (key == "videocodecid") {
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//找到视频
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videocodecid = &val;
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return;
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}
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if (key == "audiocodecid") {
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//找到音频
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audiocodecid = &val;
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return;
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}
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});
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if (videocodecid) {
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//有视频
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ret = true;
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makeVideoTrack(*videocodecid);
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}
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if (audiocodecid) {
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//有音频
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ret = true;
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makeAudioTrack(*audiocodecid, audiosamplerate, audiochannels, audiosamplesize);
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}
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} catch (std::exception &ex) {
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WarnL << ex.what();
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}
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return ret;
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}
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bool RtmpDemuxer::inputRtmp(const RtmpPacket::Ptr &pkt) {
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switch (pkt->type_id) {
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case MSG_VIDEO: {
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if(!_try_get_video_track){
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_try_get_video_track = true;
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auto codec = AMFValue(pkt->getMediaType());
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makeVideoTrack(codec);
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}
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if(_video_rtmp_decoder){
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return _video_rtmp_decoder->inputRtmp(pkt, true);
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}
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return false;
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}
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case MSG_AUDIO: {
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if(!_try_get_audio_track) {
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_try_get_audio_track = true;
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auto codec = AMFValue(pkt->getMediaType());
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makeAudioTrack(codec, pkt->getAudioSampleRate(), pkt->getAudioChannel(), pkt->getAudioSampleBit());
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}
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if(_audio_rtmp_decoder){
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_audio_rtmp_decoder->inputRtmp(pkt, false);
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return false;
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}
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return false;
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}
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default:
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return false;
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}
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}
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void RtmpDemuxer::makeVideoTrack(const AMFValue &videoCodec) {
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//生成Track对象
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_videoTrack = dynamic_pointer_cast<VideoTrack>(Factory::getVideoTrackByAmf(videoCodec));
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if (_videoTrack) {
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//生成rtmpCodec对象以便解码rtmp
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_video_rtmp_decoder = Factory::getRtmpCodecByTrack(_videoTrack, false);
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if (_video_rtmp_decoder) {
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//设置rtmp解码器代理，生成的frame写入该Track
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_video_rtmp_decoder->addDelegate(_videoTrack);
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onAddTrack(_videoTrack);
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_try_get_video_track = true;
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} else {
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//找不到相应的rtmp解码器，该track无效
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_videoTrack.reset();
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}
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}
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}
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void RtmpDemuxer::makeAudioTrack(const AMFValue &audioCodec,int sample_rate, int channels, int sample_bit) {
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//生成Track对象
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_audioTrack = dynamic_pointer_cast<AudioTrack>(Factory::getAudioTrackByAmf(audioCodec, sample_rate, channels, sample_bit));
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if (_audioTrack) {
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//生成rtmpCodec对象以便解码rtmp
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_audio_rtmp_decoder = Factory::getRtmpCodecByTrack(_audioTrack, false);
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if (_audio_rtmp_decoder) {
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//设置rtmp解码器代理，生成的frame写入该Track
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_audio_rtmp_decoder->addDelegate(_audioTrack);
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onAddTrack(_audioTrack);
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_try_get_audio_track = true;
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} else {
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//找不到相应的rtmp解码器，该track无效
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_audioTrack.reset();
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}
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}
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}
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} /* namespace mediakit */
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