ZLMediaKit/ext-codec/H264Rtmp.cpp

110 lines
3.7 KiB
C++
Raw Normal View History

2018-10-25 10:00:17 +08:00
/*
2023-12-09 16:23:51 +08:00
* Copyright (c) 2016-present The ZLMediaKit project authors. All Rights Reserved.
2018-10-25 10:00:17 +08:00
*
2023-12-09 16:23:51 +08:00
* This file is part of ZLMediaKit(https://github.com/ZLMediaKit/ZLMediaKit).
2018-10-25 10:00:17 +08:00
*
2023-12-09 16:23:51 +08:00
* Use of this source code is governed by MIT-like license that can be found in the
2020-04-04 20:30:09 +08:00
* 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.
2018-10-25 10:00:17 +08:00
*/
2018-10-24 12:01:40 +08:00
#include "Rtmp/utils.h"
2019-06-28 17:37:11 +08:00
#include "H264Rtmp.h"
using namespace std;
using namespace toolkit;
namespace mediakit {
2018-10-24 12:01:40 +08:00
void H264RtmpDecoder::inputRtmp(const RtmpPacket::Ptr &pkt) {
if (pkt->isConfigFrame()) {
2023-12-09 16:23:51 +08:00
CHECK(pkt->size() > 5);
getTrack()->setExtraData((uint8_t *)pkt->data() + 5, pkt->size() - 5);
return;
2018-10-24 12:01:40 +08:00
}
2023-12-09 16:23:51 +08:00
CHECK(pkt->size() > 9);
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;
splitFrame((uint8_t *)pkt->data() + 5, pkt->size() - 5, pkt->time_stamp, pts);
2018-10-24 12:01:40 +08:00
}
2023-12-09 16:23:51 +08:00
void H264RtmpDecoder::splitFrame(const uint8_t *data, size_t size, uint32_t dts, uint32_t pts) {
auto end = data + size;
while (data + 4 < end) {
uint32_t frame_len = load_be32(data);
data += 4;
if (data + frame_len > end) {
break;
}
outputFrame((const char *)data, frame_len, dts, pts);
data += frame_len;
2020-04-04 22:54:49 +08:00
}
2018-10-24 12:01:40 +08:00
}
2023-12-09 16:23:51 +08:00
void H264RtmpDecoder::outputFrame(const char *data, size_t len, uint32_t dts, uint32_t pts) {
auto frame = FrameImp::create<H264Frame>();
frame->_prefix_size = 4;
frame->_dts = dts;
frame->_pts = pts;
frame->_buffer.assign("\x00\x00\x00\x01", 4); // 添加264头
frame->_buffer.append(data, len);
RtmpCodec::inputFrame(frame);
}
2023-12-09 16:23:51 +08:00
////////////////////////////////////////////////////////////////////////
2018-10-24 12:01:40 +08:00
2022-10-16 19:49:56 +08:00
void H264RtmpEncoder::flush() {
inputFrame(nullptr);
}
bool H264RtmpEncoder::inputFrame(const Frame::Ptr &frame) {
2021-06-28 10:35:08 +08:00
if (!_rtmp_packet) {
_rtmp_packet = RtmpPacket::create();
//flags/not config/cts预占位
_rtmp_packet->buffer.resize(5);
}
2022-08-08 17:13:39 +08:00
return _merger.inputFrame(frame, [this](uint64_t dts, uint64_t pts, const Buffer::Ptr &, bool have_key_frame) {
// flags
_rtmp_packet->buffer[0] = (uint8_t)RtmpVideoCodec::h264 | ((uint8_t)(have_key_frame ? RtmpFrameType::key_frame : RtmpFrameType::inter_frame) << 4);
_rtmp_packet->buffer[1] = (uint8_t)RtmpH264PacketType::h264_nalu;
int32_t cts = pts - dts;
// 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);
2018-10-24 12:01:40 +08:00
}
2023-12-09 16:23:51 +08:00
void H264RtmpEncoder::makeConfigPacket() {
auto flags = (uint8_t)RtmpVideoCodec::h264;
flags |= ((uint8_t)RtmpFrameType::key_frame << 4);
auto pkt = RtmpPacket::create();
// header
pkt->buffer.push_back(flags);
pkt->buffer.push_back((uint8_t)RtmpH264PacketType::h264_config_header);
// cts
pkt->buffer.append("\x0\x0\x0", 3);
// AVCDecoderConfigurationRecord start
2023-12-09 16:23:51 +08:00
auto extra_data = getTrack()->getExtraData();
CHECK(extra_data);
pkt->buffer.append(extra_data->data(), extra_data->size());
pkt->body_size = pkt->buffer.size();
pkt->chunk_id = CHUNK_VIDEO;
pkt->stream_index = STREAM_MEDIA;
pkt->time_stamp = 0;
pkt->type_id = MSG_VIDEO;
RtmpCodec::inputRtmp(pkt);
2018-10-24 12:01:40 +08:00
}
2018-10-24 17:17:55 +08:00
}//namespace mediakit