mirror of
https://github.com/ZLMediaKit/ZLMediaKit.git
synced 2024-11-26 20:47:08 +08:00
242 lines
7.3 KiB
C++
242 lines
7.3 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/xia-chu/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 "H265Rtmp.h"
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#ifdef ENABLE_MP4
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#include "mpeg4-hevc.h"
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#endif//ENABLE_MP4
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namespace mediakit{
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H265RtmpDecoder::H265RtmpDecoder() {
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_h265frame = obtainFrame();
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}
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H265Frame::Ptr H265RtmpDecoder::obtainFrame() {
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auto frame = FrameImp::create<H265Frame>();
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frame->_prefix_size = 4;
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return frame;
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}
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#ifdef ENABLE_MP4
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/**
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* 返回不带0x00 00 00 01头的sps
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* @return
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*/
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static bool getH265ConfigFrame(const RtmpPacket &thiz,string &frame) {
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if (thiz.getMediaType() != FLV_CODEC_H265) {
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return false;
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}
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if (!thiz.isCfgFrame()) {
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return false;
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}
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if (thiz.buffer.size() < 6) {
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WarnL << "bad H265 cfg!";
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return false;
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}
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auto extra = thiz.buffer.data() + 5;
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auto bytes = thiz.buffer.size() - 5;
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struct mpeg4_hevc_t hevc = {0};
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if (mpeg4_hevc_decoder_configuration_record_load((uint8_t *) extra, bytes, &hevc) > 0) {
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uint8_t *config = new uint8_t[bytes * 2];
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int size = mpeg4_hevc_to_nalu(&hevc, config, bytes * 2);
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if (size > 4) {
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frame.assign((char *) config + 4, size - 4);
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}
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delete [] config;
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return size > 4;
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}
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return false;
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}
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#endif
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void H265RtmpDecoder::inputRtmp(const RtmpPacket::Ptr &pkt) {
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if (pkt->isCfgFrame()) {
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#ifdef ENABLE_MP4
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string config;
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if(getH265ConfigFrame(*pkt,config)){
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onGetH265(config.data(), config.size(), pkt->time_stamp , pkt->time_stamp);
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}
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#else
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WarnL << "请开启MP4相关功能并使能\"ENABLE_MP4\",否则对H265-RTMP支持不完善";
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#endif
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return;
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}
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if (pkt->buffer.size() > 9) {
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auto iTotalLen = pkt->buffer.size();
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size_t iOffset = 5;
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uint8_t *cts_ptr = (uint8_t *) (pkt->buffer.data() + 2);
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int32_t cts = (((cts_ptr[0] << 16) | (cts_ptr[1] << 8) | (cts_ptr[2])) + 0xff800000) ^ 0xff800000;
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auto pts = pkt->time_stamp + cts;
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while(iOffset + 4 < iTotalLen){
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uint32_t iFrameLen;
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memcpy(&iFrameLen, pkt->buffer.data() + iOffset, 4);
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iFrameLen = ntohl(iFrameLen);
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iOffset += 4;
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if(iFrameLen + iOffset > iTotalLen){
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break;
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}
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onGetH265(pkt->buffer.data() + iOffset, iFrameLen, pkt->time_stamp , pts);
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iOffset += iFrameLen;
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}
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}
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}
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inline void H265RtmpDecoder::onGetH265(const char* pcData, size_t iLen, uint32_t dts,uint32_t pts) {
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if(iLen == 0){
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return;
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}
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#if 1
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_h265frame->_dts = dts;
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_h265frame->_pts = pts;
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_h265frame->_buffer.assign("\x00\x00\x00\x01", 4); //添加265头
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_h265frame->_buffer.append(pcData, iLen);
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//写入环形缓存
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RtmpCodec::inputFrame(_h265frame);
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_h265frame = obtainFrame();
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#else
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//防止内存拷贝，这样产生的265帧不会有0x00 00 01头
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auto frame = std::make_shared<H265FrameNoCacheAble>((char *)pcData,iLen,dts,pts,0);
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RtmpCodec::inputFrame(frame);
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#endif
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}
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////////////////////////////////////////////////////////////////////////
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H265RtmpEncoder::H265RtmpEncoder(const Track::Ptr &track) {
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_track = dynamic_pointer_cast<H265Track>(track);
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}
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void H265RtmpEncoder::makeConfigPacket(){
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if (_track && _track->ready()) {
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//尝试从track中获取sps pps信息
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_sps = _track->getSps();
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_pps = _track->getPps();
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_vps = _track->getVps();
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}
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if (!_sps.empty() && !_pps.empty() && !_vps.empty()) {
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//获取到sps/pps
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makeVideoConfigPkt();
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_gotSpsPps = true;
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}
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}
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void H265RtmpEncoder::inputFrame(const Frame::Ptr &frame) {
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auto pcData = frame->data() + frame->prefixSize();
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auto iLen = frame->size() - frame->prefixSize();
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auto type = H265_TYPE(((uint8_t*)pcData)[0]);
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if (!_gotSpsPps) {
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//尝试从frame中获取sps pps
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switch (type) {
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case H265Frame::NAL_SPS: {
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//sps
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_sps = string(pcData, iLen);
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makeConfigPacket();
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break;
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}
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case H265Frame::NAL_PPS: {
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//pps
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_pps = string(pcData, iLen);
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makeConfigPacket();
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break;
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}
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case H265Frame::NAL_VPS: {
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//vps
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_vps = string(pcData, iLen);
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makeConfigPacket();
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break;
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}
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default:
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break;
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}
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}
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if(type == H265Frame::NAL_SEI_PREFIX || type == H265Frame::NAL_SEI_SUFFIX){
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return;
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}
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if (_lastPacket && (_lastPacket->time_stamp != frame->dts() || (type >=H264Frame::NAL_B_P && type<=H264Frame::NAL_IDR && (pcData[2]>>7 &0x01) !=0))) {
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RtmpCodec::inputRtmp(_lastPacket);
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_lastPacket = nullptr;
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}
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if(!_lastPacket) {
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//I or P or B frame
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int8_t flags = FLV_CODEC_H265;
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bool is_config = false;
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flags |= (((frame->configFrame() || frame->keyFrame()) ? FLV_KEY_FRAME : FLV_INTER_FRAME) << 4);
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_lastPacket = RtmpPacket::create();
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_lastPacket->buffer.push_back(flags);
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_lastPacket->buffer.push_back(!is_config);
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auto cts = frame->pts() - frame->dts();
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cts = htonl(cts);
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_lastPacket->buffer.append((char *)&cts + 1, 3);
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_lastPacket->chunk_id = CHUNK_VIDEO;
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_lastPacket->stream_index = STREAM_MEDIA;
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_lastPacket->time_stamp = frame->dts();
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_lastPacket->type_id = MSG_VIDEO;
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}
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uint32_t size = htonl((uint32_t)iLen);
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_lastPacket->buffer.append((char *) &size, 4);
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_lastPacket->buffer.append(pcData, iLen);
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_lastPacket->body_size = _lastPacket->buffer.size();
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}
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void H265RtmpEncoder::makeVideoConfigPkt() {
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#ifdef ENABLE_MP4
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int8_t flags = FLV_CODEC_H265;
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flags |= (FLV_KEY_FRAME << 4);
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bool is_config = true;
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auto rtmpPkt = RtmpPacket::create();
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//header
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rtmpPkt->buffer.push_back(flags);
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rtmpPkt->buffer.push_back(!is_config);
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//cts
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rtmpPkt->buffer.append("\x0\x0\x0", 3);
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struct mpeg4_hevc_t hevc = {0};
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string vps_sps_pps = string("\x00\x00\x00\x01", 4) + _vps +
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string("\x00\x00\x00\x01", 4) + _sps +
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string("\x00\x00\x00\x01", 4) + _pps;
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h265_annexbtomp4(&hevc, vps_sps_pps.data(), (int)vps_sps_pps.size(), NULL, 0, NULL, 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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//HEVCDecoderConfigurationRecord
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rtmpPkt->buffer.append((char *)extra_data, extra_data_size);
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rtmpPkt->body_size = rtmpPkt->buffer.size();
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rtmpPkt->chunk_id = CHUNK_VIDEO;
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rtmpPkt->stream_index = STREAM_MEDIA;
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rtmpPkt->time_stamp = 0;
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rtmpPkt->type_id = MSG_VIDEO;
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RtmpCodec::inputRtmp(rtmpPkt);
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#else
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WarnL << "请开启MP4相关功能并使能\"ENABLE_MP4\",否则对H265-RTMP支持不完善";
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#endif
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}
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}//namespace mediakit
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