mirror of
https://github.com/ZLMediaKit/ZLMediaKit.git
synced 2024-11-23 19:20:53 +08:00
257 lines
9.8 KiB
C++
257 lines
9.8 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 "Factory.h"
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#include "Rtmp/Rtmp.h"
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#include "H264Rtmp.h"
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#include "H265Rtmp.h"
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#include "AACRtmp.h"
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#include "G711Rtmp.h"
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#include "H264Rtp.h"
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#include "AACRtp.h"
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#include "G711Rtp.h"
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#include "H265Rtp.h"
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#include "Common/Parser.h"
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namespace mediakit{
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Track::Ptr Factory::getTrackBySdp(const SdpTrack::Ptr &track) {
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if (strcasecmp(track->_codec.data(), "mpeg4-generic") == 0) {
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string aac_cfg_str = FindField(track->_fmtp.data(), "config=", nullptr);
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if (aac_cfg_str.empty()) {
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aac_cfg_str = FindField(track->_fmtp.data(), "config=", ";");
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}
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if (aac_cfg_str.empty()) {
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//如果sdp中获取不到aac config信息，那么在rtp也无法获取，那么忽略该Track
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return nullptr;
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}
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string aac_cfg;
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for(int i = 0 ; i < aac_cfg_str.size() / 2 ; ++i ){
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unsigned int cfg;
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sscanf(aac_cfg_str.substr(i * 2, 2).data(), "%02X", &cfg);
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cfg &= 0x00FF;
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aac_cfg.push_back((char)cfg);
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}
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return std::make_shared<AACTrack>(aac_cfg);
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}
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if (strcasecmp(track->_codec.data(), "PCMA") == 0) {
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return std::make_shared<G711Track>(CodecG711A, track->_samplerate, track->_channel, 16);
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}
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if (strcasecmp(track->_codec.data(), "PCMU") == 0) {
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return std::make_shared<G711Track>(CodecG711U, track->_samplerate, track->_channel, 16);
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}
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if (strcasecmp(track->_codec.data(), "h264") == 0) {
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//a=fmtp:96 packetization-mode=1;profile-level-id=42C01F;sprop-parameter-sets=Z0LAH9oBQBboQAAAAwBAAAAPI8YMqA==,aM48gA==
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auto map = Parser::parseArgs(FindField(track->_fmtp.data()," ", nullptr),";","=");
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auto sps_pps = map["sprop-parameter-sets"];
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string base64_SPS = FindField(sps_pps.data(), NULL, ",");
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string base64_PPS = FindField(sps_pps.data(), ",", NULL);
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auto sps = decodeBase64(base64_SPS);
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auto pps = decodeBase64(base64_PPS);
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if(sps.empty() || pps.empty()){
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//如果sdp里面没有sps/pps,那么可能在后续的rtp里面恢复出sps/pps
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return std::make_shared<H264Track>();
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}
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return std::make_shared<H264Track>(sps,pps,0,0);
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}
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if (strcasecmp(track->_codec.data(), "h265") == 0) {
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//a=fmtp:96 sprop-sps=QgEBAWAAAAMAsAAAAwAAAwBdoAKAgC0WNrkky/AIAAADAAgAAAMBlQg=; sprop-pps=RAHA8vA8kAA=
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auto map = Parser::parseArgs(FindField(track->_fmtp.data()," ", nullptr),";","=");
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auto vps = decodeBase64(map["sprop-vps"]);
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auto sps = decodeBase64(map["sprop-sps"]);
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auto pps = decodeBase64(map["sprop-pps"]);
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if(sps.empty() || pps.empty()){
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//如果sdp里面没有sps/pps,那么可能在后续的rtp里面恢复出sps/pps
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return std::make_shared<H265Track>();
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}
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return std::make_shared<H265Track>(vps,sps,pps,0,0,0);
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}
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//可以根据传统的payload type 获取编码类型以及采样率等信息
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CodecId codec_id = RtpPayload::getCodecId(track->_pt);
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switch (codec_id){
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case CodecG711A :
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case CodecG711U : return std::make_shared<G711Track>(codec_id, track->_samplerate, track->_channel, 16);
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default : break;
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}
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WarnL << "暂不支持该sdp:" << track->getName();
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return nullptr;
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}
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RtpCodec::Ptr Factory::getRtpEncoderBySdp(const Sdp::Ptr &sdp) {
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GET_CONFIG(uint32_t,audio_mtu,Rtp::kAudioMtuSize);
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GET_CONFIG(uint32_t,video_mtu,Rtp::kVideoMtuSize);
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// ssrc不冲突即可,可以为任意的32位整形
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static atomic<uint32_t> s_ssrc(0);
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uint32_t ssrc = s_ssrc++;
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if(!ssrc){
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//ssrc不能为0
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ssrc = 1;
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}
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if(sdp->getTrackType() == TrackVideo){
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//视频的ssrc是偶数，方便调试
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ssrc = 2 * ssrc;
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}else{
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//音频ssrc是奇数
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ssrc = 2 * ssrc + 1;
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}
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auto mtu = (sdp->getTrackType() == TrackVideo ? video_mtu : audio_mtu);
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auto sample_rate = sdp->getSampleRate();
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auto pt = sdp->getPayloadType();
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auto interleaved = sdp->getTrackType() * 2;
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auto codec_id = sdp->getCodecId();
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switch (codec_id){
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case CodecH264 : return std::make_shared<H264RtpEncoder>(ssrc,mtu,sample_rate,pt,interleaved);
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case CodecH265 : return std::make_shared<H265RtpEncoder>(ssrc,mtu,sample_rate,pt,interleaved);
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case CodecAAC : return std::make_shared<AACRtpEncoder>(ssrc,mtu,sample_rate,pt,interleaved);
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case CodecG711A :
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case CodecG711U : return std::make_shared<G711RtpEncoder>(codec_id, ssrc, mtu, sample_rate, pt, interleaved);
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default : WarnL << "暂不支持该CodecId:" << codec_id; return nullptr;
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}
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}
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RtpCodec::Ptr Factory::getRtpDecoderByTrack(const Track::Ptr &track) {
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switch (track->getCodecId()){
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case CodecH264 : return std::make_shared<H264RtpDecoder>();
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case CodecH265 : return std::make_shared<H265RtpDecoder>();
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case CodecAAC : return std::make_shared<AACRtpDecoder>(track->clone());
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case CodecG711A :
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case CodecG711U : return std::make_shared<G711RtpDecoder>(track->getCodecId());
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default : WarnL << "暂不支持该CodecId:" << track->getCodecName(); return nullptr;
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}
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}
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/////////////////////////////rtmp相关///////////////////////////////////////////
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static CodecId getVideoCodecIdByAmf(const AMFValue &val){
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if (val.type() == AMF_STRING){
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auto str = val.as_string();
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if(str == "avc1"){
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return CodecH264;
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}
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if(str == "mp4a"){
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return CodecAAC;
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}
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if(str == "hev1" || str == "hvc1"){
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return CodecH265;
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}
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WarnL << "暂不支持该Amf:" << str;
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return CodecInvalid;
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}
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if (val.type() != AMF_NULL){
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auto type_id = val.as_integer();
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switch (type_id){
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case FLV_CODEC_H264: return CodecH264;
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case FLV_CODEC_AAC: return CodecAAC;
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case FLV_CODEC_H265: return CodecH265;
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default : WarnL << "暂不支持该Amf:" << type_id; return CodecInvalid;
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}
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}
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return CodecInvalid;
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}
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Track::Ptr getTrackByCodecId(CodecId codecId, int sample_rate = 0, int channels = 0, int sample_bit = 0) {
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switch (codecId){
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case CodecH264 : return std::make_shared<H264Track>();
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case CodecH265 : return std::make_shared<H265Track>();
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case CodecAAC : return std::make_shared<AACTrack>();
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case CodecG711A :
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case CodecG711U : return (sample_rate && channels && sample_bit) ? std::make_shared<G711Track>(codecId, sample_rate, channels, sample_bit) : nullptr;
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default : WarnL << "暂不支持该CodecId:" << codecId; return nullptr;
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}
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}
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Track::Ptr Factory::getVideoTrackByAmf(const AMFValue &amf) {
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CodecId codecId = getVideoCodecIdByAmf(amf);
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if(codecId == CodecInvalid){
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return nullptr;
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}
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return getTrackByCodecId(codecId);
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}
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static CodecId getAudioCodecIdByAmf(const AMFValue &val) {
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if (val.type() == AMF_STRING) {
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auto str = val.as_string();
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if (str == "mp4a") {
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return CodecAAC;
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}
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WarnL << "暂不支持该Amf:" << str;
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return CodecInvalid;
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}
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if (val.type() != AMF_NULL) {
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auto type_id = val.as_integer();
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switch (type_id) {
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case FLV_CODEC_AAC : return CodecAAC;
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case FLV_CODEC_G711A : return CodecG711A;
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case FLV_CODEC_G711U : return CodecG711U;
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default : WarnL << "暂不支持该Amf:" << type_id; return CodecInvalid;
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}
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}
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return CodecInvalid;
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}
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Track::Ptr Factory::getAudioTrackByAmf(const AMFValue& amf, int sample_rate, int channels, int sample_bit){
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CodecId codecId = getAudioCodecIdByAmf(amf);
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if (codecId == CodecInvalid) {
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return nullptr;
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}
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return getTrackByCodecId(codecId, sample_rate, channels, sample_bit);
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}
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RtmpCodec::Ptr Factory::getRtmpCodecByTrack(const Track::Ptr &track, bool is_encode) {
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switch (track->getCodecId()){
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case CodecH264 : return std::make_shared<H264RtmpEncoder>(track);
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case CodecAAC : return std::make_shared<AACRtmpEncoder>(track);
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case CodecH265 : return std::make_shared<H265RtmpEncoder>(track);
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case CodecG711A :
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case CodecG711U : {
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auto audio_track = dynamic_pointer_cast<AudioTrack>(track);
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if (is_encode && (audio_track->getAudioSampleRate() != 8000 ||
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audio_track->getAudioChannel() != 1 ||
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audio_track->getAudioSampleBit() != 16)) {
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//rtmp对g711只支持8000/1/16规格，但是ZLMediaKit可以解析其他规格的G711
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WarnL << "RTMP只支持8000/1/16规格的G711,目前规格是:"
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<< audio_track->getAudioSampleRate() << "/"
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<< audio_track->getAudioChannel() << "/"
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<< audio_track->getAudioSampleBit()
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<< ",该音频已被忽略";
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return nullptr;
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}
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return std::make_shared<G711RtmpEncoder>(track);
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}
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default : WarnL << "暂不支持该CodecId:" << track->getCodecName(); return nullptr;
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}
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}
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AMFValue Factory::getAmfByCodecId(CodecId codecId) {
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switch (codecId){
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case CodecAAC: return AMFValue(FLV_CODEC_AAC);
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case CodecH264: return AMFValue(FLV_CODEC_H264);
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case CodecH265: return AMFValue(FLV_CODEC_H265);
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case CodecG711A: return AMFValue(FLV_CODEC_G711A);
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case CodecG711U: return AMFValue(FLV_CODEC_G711U);
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default: return AMFValue(AMF_NULL);
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}
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}
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}//namespace mediakit
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