/*
* Copyright (c) 2016 The ZLMediaKit project authors. All Rights Reserved.
*
* This file is part of ZLMediaKit(https://github.com/xia-chu/ZLMediaKit).
*
* Use of this source code is governed by MIT license that can be found in the
* LICENSE file in the root of the source tree. All contributing project authors
* may be found in the AUTHORS file in the root of the source tree.
*/
#include "Rtmp/utils.h"
#include "H265Rtmp.h"
#ifdef ENABLE_MP4
#include "mpeg4-hevc.h"
#endif//ENABLE_MP4
namespace mediakit{
H265RtmpDecoder::H265RtmpDecoder() {
_h265frame = obtainFrame();
}
H265Frame::Ptr H265RtmpDecoder::obtainFrame() {
auto frame = FrameImp::create<H265Frame>();
frame->_prefix_size = 4;
return frame;
}
#ifdef ENABLE_MP4
/**
* 返回不带0x00 00 00 01头的sps
* @return
*/
static bool getH265ConfigFrame(const RtmpPacket &thiz,string &frame) {
if (thiz.getMediaType() != FLV_CODEC_H265) {
return false;
}
if (!thiz.isCfgFrame()) {
return false;
}
if (thiz.buffer.size() < 6) {
WarnL << "bad H265 cfg!";
return false;
}
auto extra = thiz.buffer.data() + 5;
auto bytes = thiz.buffer.size() - 5;
struct mpeg4_hevc_t hevc = {0};
if (mpeg4_hevc_decoder_configuration_record_load((uint8_t *) extra, bytes, &hevc) > 0) {
uint8_t *config = new uint8_t[bytes * 2];
int size = mpeg4_hevc_to_nalu(&hevc, config, bytes * 2);
if (size > 4) {
frame.assign((char *) config + 4, size - 4);
}
delete [] config;
return size > 4;
}
return false;
}
#endif
void H265RtmpDecoder::inputRtmp(const RtmpPacket::Ptr &pkt) {
if (pkt->isCfgFrame()) {
#ifdef ENABLE_MP4
string config;
if(getH265ConfigFrame(*pkt,config)){
onGetH265(config.data(), config.size(), pkt->time_stamp , pkt->time_stamp);
}
#else
WarnL << "请开启MP4相关功能并使能\"ENABLE_MP4\",否则对H265-RTMP支持不完善";
#endif
return;
}
if (pkt->buffer.size() > 9) {
auto total_len = pkt->buffer.size();
size_t offset = 5;
uint8_t *cts_ptr = (uint8_t *) (pkt->buffer.data() + 2);
int32_t cts = (((cts_ptr[0] << 16) | (cts_ptr[1] << 8) | (cts_ptr[2])) + 0xff800000) ^ 0xff800000;
auto pts = pkt->time_stamp + cts;
while (offset + 4 < total_len) {
uint32_t frame_len;
memcpy(&frame_len, pkt->buffer.data() + offset, 4);
frame_len = ntohl(frame_len);
offset += 4;
if (frame_len + offset > total_len) {
break;
}
onGetH265(pkt->buffer.data() + offset, frame_len, pkt->time_stamp, pts);
offset += frame_len;
}
}
}
inline void H265RtmpDecoder::onGetH265(const char* pcData, size_t iLen, uint32_t dts,uint32_t pts) {
if(iLen == 0){
return;
}
#if 1
_h265frame->_dts = dts;
_h265frame->_pts = pts;
_h265frame->_buffer.assign("\x00\x00\x00\x01", 4); //添加265头
_h265frame->_buffer.append(pcData, iLen);
//写入环形缓存
RtmpCodec::inputFrame(_h265frame);
_h265frame = obtainFrame();
#else
//防止内存拷贝，这样产生的265帧不会有0x00 00 01头
auto frame = std::make_shared<H265FrameNoCacheAble>((char *)pcData,iLen,dts,pts,0);
RtmpCodec::inputFrame(frame);
#endif
}
////////////////////////////////////////////////////////////////////////
H265RtmpEncoder::H265RtmpEncoder(const Track::Ptr &track) {
_track = dynamic_pointer_cast<H265Track>(track);
}
void H265RtmpEncoder::makeConfigPacket(){
if (_track && _track->ready()) {
//尝试从track中获取sps pps信息
_sps = _track->getSps();
_pps = _track->getPps();
_vps = _track->getVps();
}
if (!_sps.empty() && !_pps.empty() && !_vps.empty()) {
//获取到sps/pps
makeVideoConfigPkt();
_got_config_frame = true;
}
}
void H265RtmpEncoder::inputFrame(const Frame::Ptr &frame) {
auto data = frame->data() + frame->prefixSize();
auto len = frame->size() - frame->prefixSize();
auto type = H265_TYPE(data[0]);
switch (type) {
case H265Frame::NAL_SPS: {
if (!_got_config_frame) {
_sps = string(data, len);
makeConfigPacket();
}
break;
}
case H265Frame::NAL_PPS: {
if (!_got_config_frame) {
_pps = string(data, len);
makeConfigPacket();
}
break;
}
case H265Frame::NAL_VPS: {
if (!_got_config_frame) {
_vps = string(data, len);
makeConfigPacket();
}
break;
}
default: break;
}
if (!_rtmp_packet) {
_rtmp_packet = RtmpPacket::create();
//flags/not_config/cts预占位
_rtmp_packet->buffer.resize(5);
}
_merger.inputFrame(frame, [this](uint32_t dts, uint32_t pts, const Buffer::Ptr &, bool have_key_frame) {
//flags
_rtmp_packet->buffer[0] = FLV_CODEC_H265 | ((have_key_frame ? FLV_KEY_FRAME : FLV_INTER_FRAME) << 4);
//not config
_rtmp_packet->buffer[1] = true;
int32_t cts = pts - dts;
if (cts < 0) {
cts = 0;
}
//cts
set_be24(&_rtmp_packet->buffer[2], cts);
_rtmp_packet->time_stamp = dts;
_rtmp_packet->body_size = _rtmp_packet->buffer.size();
_rtmp_packet->chunk_id = CHUNK_VIDEO;
_rtmp_packet->stream_index = STREAM_MEDIA;
_rtmp_packet->type_id = MSG_VIDEO;
//输出rtmp packet
RtmpCodec::inputRtmp(_rtmp_packet);
_rtmp_packet = nullptr;
}, &_rtmp_packet->buffer);
}
void H265RtmpEncoder::makeVideoConfigPkt() {
#ifdef ENABLE_MP4
int8_t flags = FLV_CODEC_H265;
flags |= (FLV_KEY_FRAME << 4);
bool is_config = true;
auto rtmpPkt = RtmpPacket::create();
//header
rtmpPkt->buffer.push_back(flags);
rtmpPkt->buffer.push_back(!is_config);
//cts
rtmpPkt->buffer.append("\x0\x0\x0", 3);
struct mpeg4_hevc_t hevc = {0};
string vps_sps_pps = string("\x00\x00\x00\x01", 4) + _vps +
string("\x00\x00\x00\x01", 4) + _sps +
string("\x00\x00\x00\x01", 4) + _pps;
h265_annexbtomp4(&hevc, vps_sps_pps.data(), (int)vps_sps_pps.size(), NULL, 0, NULL, NULL);
uint8_t extra_data[1024];
int extra_data_size = mpeg4_hevc_decoder_configuration_record_save(&hevc, extra_data, sizeof(extra_data));
if (extra_data_size == -1) {
WarnL << "生成H265 extra_data 失败";
return;
}
//HEVCDecoderConfigurationRecord
rtmpPkt->buffer.append((char *)extra_data, extra_data_size);
rtmpPkt->body_size = rtmpPkt->buffer.size();
rtmpPkt->chunk_id = CHUNK_VIDEO;
rtmpPkt->stream_index = STREAM_MEDIA;
rtmpPkt->time_stamp = 0;
rtmpPkt->type_id = MSG_VIDEO;
RtmpCodec::inputRtmp(rtmpPkt);
#else
WarnL << "请开启MP4相关功能并使能\"ENABLE_MP4\",否则对H265-RTMP支持不完善";
#endif
}
}//namespace mediakit