mirror of
https://github.com/ZLMediaKit/ZLMediaKit.git
synced 2024-11-30 07:26:53 +08:00
237 lines
7.5 KiB
C++
237 lines
7.5 KiB
C++
/*
|
||
* MIT License
|
||
*
|
||
* Copyright (c) 2016-2019 xiongziliang <771730766@qq.com>
|
||
*
|
||
* This file is part of ZLMediaKit(https://github.com/xiongziliang/ZLMediaKit).
|
||
*
|
||
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
||
* of this software and associated documentation files (the "Software"), to deal
|
||
* in the Software without restriction, including without limitation the rights
|
||
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
||
* copies of the Software, and to permit persons to whom the Software is
|
||
* furnished to do so, subject to the following conditions:
|
||
*
|
||
* The above copyright notice and this permission notice shall be included in all
|
||
* copies or substantial portions of the Software.
|
||
*
|
||
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
||
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
||
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
||
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
||
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
|
||
* SOFTWARE.
|
||
*/
|
||
|
||
#include "H264Rtmp.h"
|
||
|
||
namespace mediakit{
|
||
|
||
H264RtmpDecoder::H264RtmpDecoder() {
|
||
_h264frame = obtainFrame();
|
||
}
|
||
|
||
H264Frame::Ptr H264RtmpDecoder::obtainFrame() {
|
||
//从缓存池重新申请对象，防止覆盖已经写入环形缓存的对象
|
||
auto frame = obtainObj();
|
||
frame->buffer.clear();
|
||
frame->iPrefixSize = 4;
|
||
return frame;
|
||
}
|
||
|
||
bool H264RtmpDecoder::inputRtmp(const RtmpPacket::Ptr &rtmp, bool key_pos) {
|
||
key_pos = decodeRtmp(rtmp);
|
||
RtmpCodec::inputRtmp(rtmp, key_pos);
|
||
return key_pos;
|
||
}
|
||
|
||
bool H264RtmpDecoder::decodeRtmp(const RtmpPacket::Ptr &pkt) {
|
||
if (pkt->isCfgFrame()) {
|
||
//缓存sps pps，后续插入到I帧之前
|
||
_sps = pkt->getH264SPS();
|
||
_pps = pkt->getH264PPS();
|
||
onGetH264(_sps.data(), _sps.size(), pkt->timeStamp , pkt->timeStamp);
|
||
onGetH264(_pps.data(), _pps.size(), pkt->timeStamp , pkt->timeStamp);
|
||
return false;
|
||
}
|
||
|
||
if (pkt->strBuf.size() > 9) {
|
||
uint32_t iTotalLen = pkt->strBuf.size();
|
||
uint32_t iOffset = 5;
|
||
uint8_t *cts_ptr = (uint8_t *) (pkt->strBuf.data() + 2);
|
||
int32_t cts = (((cts_ptr[0] << 16) | (cts_ptr[1] << 8) | (cts_ptr[2])) + 0xff800000) ^ 0xff800000;
|
||
auto pts = pkt->timeStamp + cts;
|
||
|
||
while(iOffset + 4 < iTotalLen){
|
||
uint32_t iFrameLen;
|
||
memcpy(&iFrameLen, pkt->strBuf.data() + iOffset, 4);
|
||
iFrameLen = ntohl(iFrameLen);
|
||
iOffset += 4;
|
||
if(iFrameLen + iOffset > iTotalLen){
|
||
break;
|
||
}
|
||
onGetH264(pkt->strBuf.data() + iOffset, iFrameLen, pkt->timeStamp , pts);
|
||
iOffset += iFrameLen;
|
||
}
|
||
}
|
||
return pkt->isVideoKeyFrame();
|
||
}
|
||
|
||
inline void H264RtmpDecoder::onGetH264(const char* pcData, int iLen, uint32_t dts,uint32_t pts) {
|
||
#if 1
|
||
_h264frame->timeStamp = dts;
|
||
_h264frame->ptsStamp = pts;
|
||
_h264frame->buffer.assign("\x0\x0\x0\x1", 4); //添加264头
|
||
_h264frame->buffer.append(pcData, iLen);
|
||
|
||
//写入环形缓存
|
||
RtmpCodec::inputFrame(_h264frame);
|
||
_h264frame = obtainFrame();
|
||
#else
|
||
//防止内存拷贝，这样产生的264帧不会有0x00 00 01头
|
||
auto frame = std::make_shared<H264FrameNoCacheAble>((char *)pcData,iLen,dts,pts,0);
|
||
RtmpCodec::inputFrame(frame);
|
||
#endif
|
||
}
|
||
|
||
|
||
|
||
////////////////////////////////////////////////////////////////////////
|
||
|
||
H264RtmpEncoder::H264RtmpEncoder(const Track::Ptr &track) {
|
||
_track = dynamic_pointer_cast<H264Track>(track);
|
||
|
||
}
|
||
|
||
void H264RtmpEncoder::inputFrame(const Frame::Ptr &frame) {
|
||
RtmpCodec::inputFrame(frame);
|
||
|
||
auto pcData = frame->data() + frame->prefixSize();
|
||
auto iLen = frame->size() - frame->prefixSize();
|
||
auto type = H264_TYPE(((uint8_t*)pcData)[0]);
|
||
|
||
if(!_gotSpsPps){
|
||
//尝试从frame中获取sps pps
|
||
switch (type){
|
||
case H264Frame::NAL_SPS:{
|
||
//sps
|
||
if(_sps.empty()){
|
||
_sps = string(pcData,iLen);
|
||
}
|
||
}
|
||
break;
|
||
case H264Frame::NAL_PPS:{
|
||
//pps
|
||
if(_pps.empty()){
|
||
_pps = string(pcData,iLen);
|
||
}
|
||
}
|
||
break;
|
||
default:
|
||
break;
|
||
}
|
||
|
||
if(_track && _track->ready()){
|
||
//尝试从track中获取sps pps信息
|
||
_sps = _track->getSps();
|
||
_pps = _track->getPps();
|
||
}
|
||
|
||
if(!_sps.empty() && !_pps.empty()){
|
||
_gotSpsPps = true;
|
||
makeVideoConfigPkt();
|
||
}
|
||
}
|
||
|
||
switch (type){
|
||
case H264Frame::NAL_IDR:
|
||
case H264Frame::NAL_B_P:{
|
||
if(_lastPacket && _lastPacket->timeStamp != frame->stamp()) {
|
||
RtmpCodec::inputRtmp(_lastPacket, _lastPacket->isVideoKeyFrame());
|
||
_lastPacket = nullptr;
|
||
}
|
||
|
||
if(!_lastPacket) {
|
||
//I or P or B frame
|
||
int8_t flags = 7; //h.264
|
||
bool is_config = false;
|
||
flags |= ((frame->keyFrame() ? FLV_KEY_FRAME : FLV_INTER_FRAME) << 4);
|
||
|
||
_lastPacket = ResourcePoolHelper<RtmpPacket>::obtainObj();
|
||
_lastPacket->strBuf.clear();
|
||
_lastPacket->strBuf.push_back(flags);
|
||
_lastPacket->strBuf.push_back(!is_config);
|
||
auto cts = frame->pts() - frame->dts();
|
||
cts = htonl(cts);
|
||
_lastPacket->strBuf.append((char *)&cts + 1, 3);
|
||
|
||
_lastPacket->chunkId = CHUNK_VIDEO;
|
||
_lastPacket->streamId = STREAM_MEDIA;
|
||
_lastPacket->timeStamp = frame->stamp();
|
||
_lastPacket->typeId = MSG_VIDEO;
|
||
|
||
}
|
||
auto size = htonl(iLen);
|
||
_lastPacket->strBuf.append((char *) &size, 4);
|
||
_lastPacket->strBuf.append(pcData, iLen);
|
||
_lastPacket->bodySize = _lastPacket->strBuf.size();
|
||
}
|
||
break;
|
||
|
||
default:
|
||
break;
|
||
}
|
||
}
|
||
|
||
|
||
void H264RtmpEncoder::makeVideoConfigPkt() {
|
||
int8_t flags = 7; //h.264
|
||
flags |= (FLV_KEY_FRAME << 4);
|
||
bool is_config = true;
|
||
|
||
RtmpPacket::Ptr rtmpPkt = ResourcePoolHelper<RtmpPacket>::obtainObj();
|
||
rtmpPkt->strBuf.clear();
|
||
|
||
//////////header
|
||
rtmpPkt->strBuf.push_back(flags);
|
||
rtmpPkt->strBuf.push_back(!is_config);
|
||
rtmpPkt->strBuf.append("\x0\x0\x0", 3);
|
||
|
||
////////////sps
|
||
rtmpPkt->strBuf.push_back(1); // version
|
||
|
||
//DebugL<<hexdump(_sps.data(), _sps.size());
|
||
rtmpPkt->strBuf.push_back(_sps[1]); // profile
|
||
rtmpPkt->strBuf.push_back(_sps[2]); // compat
|
||
rtmpPkt->strBuf.push_back(_sps[3]); // level
|
||
rtmpPkt->strBuf.push_back(0xff); // 6 bits reserved + 2 bits nal size length - 1 (11)
|
||
rtmpPkt->strBuf.push_back(0xe1); // 3 bits reserved + 5 bits number of sps (00001)
|
||
uint16_t size = _sps.size();
|
||
size = htons(size);
|
||
rtmpPkt->strBuf.append((char *) &size, 2);
|
||
rtmpPkt->strBuf.append(_sps);
|
||
|
||
/////////////pps
|
||
rtmpPkt->strBuf.push_back(1); // version
|
||
size = _pps.size();
|
||
size = htons(size);
|
||
rtmpPkt->strBuf.append((char *) &size, 2);
|
||
rtmpPkt->strBuf.append(_pps);
|
||
|
||
rtmpPkt->bodySize = rtmpPkt->strBuf.size();
|
||
rtmpPkt->chunkId = CHUNK_VIDEO;
|
||
rtmpPkt->streamId = STREAM_MEDIA;
|
||
rtmpPkt->timeStamp = 0;
|
||
rtmpPkt->typeId = MSG_VIDEO;
|
||
RtmpCodec::inputRtmp(rtmpPkt, false);
|
||
}
|
||
|
||
|
||
}//namespace mediakit
|
||
|
||
|
||
|
||
|
||
|