mirror of
https://github.com/ZLMediaKit/ZLMediaKit.git
synced 2024-11-24 03:30:52 +08:00
334 lines
11 KiB
C++
334 lines
11 KiB
C++
/*
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* MIT License
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*
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* Copyright (c) 2016 xiongziliang <771730766@qq.com>
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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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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#include "MediaReader.h"
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#include "Common/config.h"
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#include "Util/mini.h"
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#include "Http/HttpSession.h"
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using namespace toolkit;
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namespace mediakit {
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#ifdef ENABLE_MP4V2
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MediaReader::MediaReader(const string &strVhost,const string &strApp, const string &strId,const string &filePath ) {
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auto strFileName = filePath;
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if(strFileName.empty()){
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GET_CONFIG_AND_REGISTER(string,recordPath,Record::kFilePath);
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strFileName = recordPath + "/" + strVhost + "/" + strApp + "/" + strId;
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}
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_hMP4File = MP4Read(strFileName.data());
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if(_hMP4File == MP4_INVALID_FILE_HANDLE){
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throw runtime_error(StrPrinter << "打开MP4文件失败:" << strFileName << endl);
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}
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_video_trId = MP4FindTrackId(_hMP4File, 0, MP4_VIDEO_TRACK_TYPE, 0);
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if(_video_trId != MP4_INVALID_TRACK_ID){
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if(strcmp(MP4GetTrackMediaDataName(_hMP4File, _video_trId),"avc1") ==0){
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auto _video_timescale = MP4GetTrackTimeScale(_hMP4File, _video_trId);
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auto _video_duration = MP4GetTrackDuration(_hMP4File, _video_trId);
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_video_num_samples = MP4GetTrackNumberOfSamples(_hMP4File, _video_trId);
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_video_sample_max_size = MP4GetTrackMaxSampleSize(_hMP4File, _video_trId);
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_video_width = MP4GetTrackVideoWidth(_hMP4File, _video_trId);
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_video_height = MP4GetTrackVideoHeight(_hMP4File, _video_trId);
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_video_framerate = MP4GetTrackVideoFrameRate(_hMP4File, _video_trId);
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_pcVideoSample = std::shared_ptr<uint8_t> (new uint8_t[_video_sample_max_size],[](uint8_t *ptr){
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delete [] ptr;
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});
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uint8_t **seqheader;
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uint8_t **pictheader;
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uint32_t *pictheadersize;
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uint32_t *seqheadersize;
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uint32_t ix;
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if(MP4GetTrackH264SeqPictHeaders(_hMP4File, _video_trId, &seqheader, &seqheadersize, &pictheader, &pictheadersize)){
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for (ix = 0; seqheadersize[ix] != 0; ix++) {
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_strSps.assign((char *)(seqheader[ix]), seqheadersize[ix]);
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float framerate;
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getAVCInfo(_strSps, (int &)_video_width, (int &)_video_height, framerate);
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_video_framerate = framerate;
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_strSps = string("\x0\x0\x0\x1",4) + _strSps;
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MP4Free(seqheader[ix]);
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}
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MP4Free(seqheader);
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MP4Free(seqheadersize);
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for (ix = 0; pictheadersize[ix] != 0; ix++) {
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_strPps.assign("\x0\x0\x0\x1",4);
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_strPps.append((char *)(pictheader[ix]), pictheadersize[ix]);
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MP4Free(pictheader[ix]);
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}
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MP4Free(pictheader);
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MP4Free(pictheadersize);
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}
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_video_ms = 1000.0 * _video_duration / _video_timescale;
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/*InfoL << "\r\n"
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<< _video_ms << "\r\n"
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<< _video_num_samples << "\r\n"
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<< _video_framerate << "\r\n"
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<< _video_width << "\r\n"
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<< _video_height << "\r\n";*/
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} else {
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//如果不是h264，则忽略
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_video_trId = MP4_INVALID_TRACK_ID;
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}
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}
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_audio_trId = MP4FindTrackId(_hMP4File, 0, MP4_AUDIO_TRACK_TYPE, 0);
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if (_audio_trId != MP4_INVALID_TRACK_ID) {
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if (strcmp(MP4GetTrackMediaDataName(_hMP4File, _audio_trId), "mp4a") == 0) {
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_audio_sample_rate = MP4GetTrackTimeScale(_hMP4File, _audio_trId);
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auto _audio_duration = MP4GetTrackDuration(_hMP4File, _audio_trId);
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_audio_num_samples = MP4GetTrackNumberOfSamples(_hMP4File,_audio_trId);
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_audio_num_channels = MP4GetTrackAudioChannels(_hMP4File, _audio_trId);
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_audio_sample_max_size = MP4GetTrackMaxSampleSize(_hMP4File,_audio_trId);
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uint8_t *ppConfig;
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uint32_t pConfigSize;
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if(MP4GetTrackESConfiguration(_hMP4File,_audio_trId,&ppConfig,&pConfigSize)){
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_strAacCfg.assign((char *)ppConfig, pConfigSize);
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makeAdtsHeader(_strAacCfg, _adts);
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writeAdtsHeader(_adts,_adts.buffer);
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getAACInfo(_adts, (int &)_audio_sample_rate, (int &)_audio_num_channels);
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MP4Free(ppConfig);
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}
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_audio_ms = 1000.0 * _audio_duration / _audio_sample_rate;
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/*InfoL << "\r\n"
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<< _audio_ms << "\r\n"
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<< _audio_num_samples << "\r\n"
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<< _audio_num_channels << "\r\n"
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<< _audio_sample_rate << "\r\n";*/
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}else{
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_audio_trId = MP4_INVALID_TRACK_ID;
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}
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}
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if(_audio_trId == MP4_INVALID_TRACK_ID && _video_trId == MP4_INVALID_TRACK_ID){
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MP4Close(_hMP4File);
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_hMP4File = MP4_INVALID_FILE_HANDLE;
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throw runtime_error(StrPrinter << "该MP4文件音视频格式不支持:" << strFileName << endl);
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}
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_iDuration = MAX(_video_ms,_audio_ms);
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_mediaMuxer.reset(new MultiMediaSourceMuxer(strVhost,strApp,strId,_iDuration/1000.0,false, false));
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if (_audio_trId != MP4_INVALID_TRACK_ID) {
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AACTrack::Ptr track = std::make_shared<AACTrack>(_strAacCfg);
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_mediaMuxer->addTrack(track);
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}
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if (_video_trId != MP4_INVALID_TRACK_ID) {
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H264Track::Ptr track = std::make_shared<H264Track>(_strSps,_strPps);
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_mediaMuxer->addTrack(track);
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}
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}
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MediaReader::~MediaReader() {
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if (_hMP4File != MP4_INVALID_FILE_HANDLE) {
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MP4Close(_hMP4File);
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_hMP4File = MP4_INVALID_FILE_HANDLE;
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}
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}
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void MediaReader::startReadMP4() {
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auto strongSelf = shared_from_this();
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GET_CONFIG_AND_REGISTER(uint32_t,sampleMS,Record::kSampleMS);
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_timer = std::make_shared<Timer>(sampleMS / 1000.0f,[strongSelf](){
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return strongSelf->readSample(0,false);
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}, nullptr);
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//先读sampleMS毫秒的数据用于产生MediaSouce
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readSample(sampleMS, false);
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_mediaMuxer->setListener(strongSelf);
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}
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bool MediaReader::seekTo(uint32_t ui32Stamp){
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seek(ui32Stamp);
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return true;
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}
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bool MediaReader::close(){
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_timer.reset();
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return true;
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}
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bool MediaReader::readSample(int iTimeInc,bool justSeekSyncFrame) {
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TimeTicker();
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lock_guard<recursive_mutex> lck(_mtx);
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auto bFlag0 = readVideoSample(iTimeInc,justSeekSyncFrame);//数据没读完
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auto bFlag1 = readAudioSample(iTimeInc,justSeekSyncFrame);//数据没读完
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auto bFlag2 = _mediaMuxer->readerCount() > 0;//读取者大于0
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if((bFlag0 || bFlag1) && bFlag2){
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_alive.resetTime();
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}
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//DebugL << "alive ...";
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//3秒延时关闭
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return _alive.elapsedTime() < 3 * 1000;
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}
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inline bool MediaReader::readVideoSample(int iTimeInc,bool justSeekSyncFrame) {
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if (_video_trId != MP4_INVALID_TRACK_ID) {
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auto iNextSample = getVideoSampleId(iTimeInc);
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MP4SampleId iIdx = _video_current;
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for (; iIdx < iNextSample; iIdx++) {
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uint8_t *pBytes = _pcVideoSample.get();
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uint32_t numBytes = _video_sample_max_size;
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if(MP4ReadSample(_hMP4File, _video_trId, iIdx + 1, &pBytes, &numBytes,NULL,NULL,NULL,&_bSyncSample)){
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if (!justSeekSyncFrame) {
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uint32_t iOffset = 0;
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while (iOffset < numBytes) {
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uint32_t iFrameLen;
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memcpy(&iFrameLen,pBytes + iOffset,4);
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iFrameLen = ntohl(iFrameLen);
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if(iFrameLen + iOffset + 4> numBytes){
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break;
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}
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memcpy(pBytes + iOffset, "\x0\x0\x0\x1", 4);
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writeH264(pBytes + iOffset, iFrameLen + 4, (double) _video_ms * iIdx / _video_num_samples);
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iOffset += (iFrameLen + 4);
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}
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}else if(_bSyncSample){
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break;
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}
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}else{
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ErrorL << "读取视频失败:" << iIdx + 1;
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}
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}
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_video_current = iIdx;
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return _video_current < _video_num_samples;
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}
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return false;
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}
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inline bool MediaReader::readAudioSample(int iTimeInc,bool justSeekSyncFrame) {
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if (_audio_trId != MP4_INVALID_TRACK_ID) {
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auto iNextSample = getAudioSampleId(iTimeInc);
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for (auto i = _audio_current; i < iNextSample; i++) {
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uint32_t numBytes = _audio_sample_max_size;
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uint8_t *pBytes = _adts.buffer + 7;
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if(MP4ReadSample(_hMP4File, _audio_trId, i + 1, &pBytes, &numBytes)){
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if (!justSeekSyncFrame) {
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_adts.aac_frame_length = 7 + numBytes;
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writeAdtsHeader(_adts, _adts.buffer);
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writeAAC(_adts.buffer, _adts.aac_frame_length, (double) _audio_ms * i / _audio_num_samples);
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}
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}else{
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ErrorL << "读取音频失败:" << i+ 1;
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}
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}
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_audio_current = iNextSample;
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return _audio_current < _audio_num_samples;
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}
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return false;
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}
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inline void MediaReader::writeH264(uint8_t *pucData,int iLen,uint32_t uiStamp) {
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_mediaMuxer->inputFrame(std::make_shared<H264FrameNoCopyAble>((char*)pucData,iLen,uiStamp));
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}
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inline void MediaReader::writeAAC(uint8_t *pucData,int iLen,uint32_t uiStamp) {
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_mediaMuxer->inputFrame(std::make_shared<AACFrameNoCopyAble>((char*)pucData,iLen,uiStamp));
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}
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inline MP4SampleId MediaReader::getVideoSampleId(int iTimeInc ) {
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MP4SampleId video_current = (double)_video_num_samples * (_iSeekTime + _ticker.elapsedTime() + iTimeInc) / _video_ms;
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video_current = MAX(0,MIN(_video_num_samples, video_current));
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return video_current;
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}
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inline MP4SampleId MediaReader::getAudioSampleId(int iTimeInc) {
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MP4SampleId audio_current = (double)_audio_num_samples * (_iSeekTime + _ticker.elapsedTime() + iTimeInc) / _audio_ms ;
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audio_current = MAX(0,MIN(_audio_num_samples,audio_current));
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return audio_current;
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}
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inline void MediaReader::setSeekTime(uint32_t iSeekTime){
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_iSeekTime = MAX(0, MIN(iSeekTime,_iDuration));
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_ticker.resetTime();
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if (_audio_trId != MP4_INVALID_TRACK_ID) {
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_audio_current = getAudioSampleId();
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}
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if (_video_trId != MP4_INVALID_TRACK_ID) {
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_video_current = getVideoSampleId();
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}
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}
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inline uint32_t MediaReader::getVideoCurrentTime(){
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return (double)_video_current * _video_ms /_video_num_samples;
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}
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void MediaReader::seek(uint32_t iSeekTime,bool bReStart){
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lock_guard<recursive_mutex> lck(_mtx);
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if(iSeekTime == 0 || _video_trId == MP4_INVALID_TRACK_ID){
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setSeekTime(iSeekTime);
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}else{
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setSeekTime(iSeekTime - 5000);
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//在之后的10秒查找关键帧
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readVideoSample(10000, true);
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if (_bSyncSample) {
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//找到关键帧
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auto iIdr = _video_current;
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setSeekTime(getVideoCurrentTime());
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_video_current = iIdr;
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}else{
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//未找到关键帧
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setSeekTime(iSeekTime);
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}
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}
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_mediaMuxer->setTimeStamp(_iSeekTime);
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if(bReStart){
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_timer.reset();
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startReadMP4();
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}
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}
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#endif //ENABLE_MP4V2
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MediaSource::Ptr MediaReader::onMakeMediaSource(const string &strSchema,
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const string &strVhost,
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const string &strApp,
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const string &strId,
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const string &filePath,
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bool checkApp ){
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#ifdef ENABLE_MP4V2
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GET_CONFIG_AND_REGISTER(string,appName,Record::kAppName);
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if (checkApp && strApp != appName) {
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return nullptr;
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}
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try {
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MediaReader::Ptr pReader(new MediaReader(strVhost,strApp, strId,filePath));
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pReader->startReadMP4();
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return MediaSource::find(strSchema,strVhost,strApp, strId, false);
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} catch (std::exception &ex) {
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WarnL << ex.what();
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return nullptr;
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}
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#else
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return nullptr;
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#endif //ENABLE_MP4V2
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}
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} /* namespace mediakit */
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