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https://github.com/ZLMediaKit/ZLMediaKit.git
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重新mp4录制
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xiongziliang
230
src/MediaFile/MP4Muxer.cpp
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230
src/MediaFile/MP4Muxer.cpp
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/*
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* MIT License
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*
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* Copyright (c) 2016-2019 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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#ifdef ENABLE_MP4RECORD
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#include "MP4Muxer.h"
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#include "Util/File.h"
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namespace mediakit{
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#if defined(_WIN32) || defined(_WIN64)
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#define fseek64 _fseeki64
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#define ftell64 _ftelli64
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#else
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#define fseek64 fseek
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#define ftell64 ftell
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#endif
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MP4MuxerBase::MP4MuxerBase(int flags) {
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static struct mov_buffer_t s_io = {
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[](void* ctx, void* data, uint64_t bytes) {
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MP4MuxerBase *thiz = (MP4MuxerBase *)ctx;
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return thiz->onRead(data,bytes);
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},
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[](void* ctx, const void* data, uint64_t bytes){
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MP4MuxerBase *thiz = (MP4MuxerBase *)ctx;
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return thiz->onWrite(data,bytes);
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},
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[](void* ctx, uint64_t offset) {
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MP4MuxerBase *thiz = (MP4MuxerBase *)ctx;
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return thiz->onSeek(offset);
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},
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[](void* ctx){
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MP4MuxerBase *thiz = (MP4MuxerBase *)ctx;
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return thiz->onTell();
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}
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};
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_mov_writter.reset(mov_writer_create(&s_io,this,flags),[](mov_writer_t *ptr){
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if(ptr){
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mov_writer_destroy(ptr);
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}
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});
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}
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///////////////////////////////////
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MP4Muxer::MP4Muxer(int flags) : MP4MuxerBase(flags) {
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}
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void MP4Muxer::onTrackFrame(const Frame::Ptr &frame) {
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if(frame->configFrame()){
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//忽略配置帧
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return;
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}
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auto it = _codec_to_trackid.find(frame->getCodecId());
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if(it == _codec_to_trackid.end()){
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return;
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}
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mov_writer_write_l(_mov_writter.get(),
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it->second,
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frame->data() + frame->prefixSize(),
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frame->size() - frame->prefixSize(),
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frame->pts(),
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frame->dts(),
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frame->keyFrame() ? MOV_AV_FLAG_KEYFREAME : 0,
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0);
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}
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void MP4Muxer::onTrackReady(const Track::Ptr &track) {
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switch (track->getCodecId()) {
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case CodecAAC: {
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auto aac_track = dynamic_pointer_cast<AACTrack>(track);
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if (!aac_track) {
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WarnL << "不是AAC Track";
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return;
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}
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auto track_id = mov_writer_add_audio(_mov_writter.get(),
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MOV_OBJECT_AAC,
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aac_track->getAudioChannel(),
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aac_track->getAudioSampleBit(),
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aac_track->getAudioSampleRate(),
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aac_track->getAacCfg().data(), 2);
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_codec_to_trackid[track->getCodecId()] = track_id;
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}
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break;
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case CodecH264: {
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auto h264_track = dynamic_pointer_cast<H264Track>(track);
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if (!h264_track) {
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WarnL << "不是H264 Track";
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return;
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}
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struct mpeg4_avc_t avc;
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string sps_pps = string("\x00\x00\x00\x01", 4) + h264_track->getSps() +
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string("\x00\x00\x00\x01", 4) + h264_track->getPps();
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h264_annexbtomp4(&avc, sps_pps.data(), sps_pps.size(), NULL, 0, NULL);
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uint8_t extra_data[1024];
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int extra_data_size = mpeg4_avc_decoder_configuration_record_save(&avc, extra_data, sizeof(extra_data));
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if (extra_data_size == -1) {
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WarnL << "生成H264 extra_data 失败";
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return;
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}
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auto track_id = mov_writer_add_video(_mov_writter.get(),
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MOV_OBJECT_H264,
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h264_track->getVideoWidth(),
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h264_track->getVideoHeight(),
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extra_data,
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extra_data_size);
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_codec_to_trackid[track->getCodecId()] = track_id;
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}
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break;
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case CodecH265: {
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auto h265_track = dynamic_pointer_cast<H265Track>(track);
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if (!h265_track) {
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WarnL << "不是H265 Track";
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return;
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}
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struct mpeg4_hevc_t hevc;
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string vps_sps_pps = string("\x00\x00\x00\x01", 4) + h265_track->getVps() +
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string("\x00\x00\x00\x01", 4) + h265_track->getSps() +
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string("\x00\x00\x00\x01", 4) + h265_track->getPps();
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h265_annexbtomp4(&hevc, vps_sps_pps.data(), vps_sps_pps.size(), NULL, 0, NULL);
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uint8_t extra_data[1024];
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int extra_data_size = mpeg4_hevc_decoder_configuration_record_save(&hevc, extra_data, sizeof(extra_data));
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if (extra_data_size == -1) {
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WarnL << "生成H265 extra_data 失败";
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return;
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}
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auto track_id = mov_writer_add_video(_mov_writter.get(),
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MOV_OBJECT_HEVC,
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h265_track->getVideoWidth(),
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h265_track->getVideoHeight(),
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extra_data,
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extra_data_size);
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_codec_to_trackid[track->getCodecId()] = track_id;
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}
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break;
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default:
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WarnL << "MP4录制不支持该编码格式:" << track->getCodecId();
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break;
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}
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}
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#define FILE_BUF_SIZE (64 * 1024)
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MP4MuxerFile::MP4MuxerFile(const char *file) {
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//创建文件
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auto fp = File::createfile_file(file,"wb");
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if(!fp){
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throw std::runtime_error(string("打开文件失败:") + file);
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}
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//新建文件io缓存
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std::shared_ptr<char> file_buf(new char[FILE_BUF_SIZE],[](char *ptr){
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if(ptr){
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delete [] ptr;
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}
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});
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if(file_buf){
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//设置文件io缓存
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setvbuf(fp, file_buf.get(), _IOFBF, FILE_BUF_SIZE);
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}
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//创建智能指针
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_file.reset(fp,[file_buf](FILE *fp) {
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fclose(fp);
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});
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}
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int MP4MuxerFile::onRead(void *data, uint64_t bytes) {
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return fread(data, 1, bytes, _file.get());
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}
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int MP4MuxerFile::onWrite(const void *data, uint64_t bytes) {
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return fwrite(data, 1, bytes, _file.get());
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}
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#if defined(_WIN32) || defined(_WIN64)
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#define fseek64 _fseeki64
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#define ftell64 _ftelli64
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#else
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#define fseek64 fseek
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#define ftell64 ftell
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#endif
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int MP4MuxerFile::onSeek(uint64_t offset) {
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return fseek64(_file.get(), offset, SEEK_SET);
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}
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uint64_t MP4MuxerFile::onTell() {
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return ftell64(_file.get());
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}
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}//namespace mediakit
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#endif//#ifdef ENABLE_MP4RECORD
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