112 lines
3.9 KiB
C++
112 lines
3.9 KiB
C++
/*
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* Copyright (c) 2016-present The ZLMediaKit project authors. All Rights Reserved.
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*
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* This file is part of ZLMediaKit(https://github.com/ZLMediaKit/ZLMediaKit).
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*
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* Use of this source code is governed by MIT-like 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 "Rtmp/utils.h"
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#include "H264Rtmp.h"
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using namespace std;
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using namespace toolkit;
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namespace mediakit {
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void H264RtmpDecoder::inputRtmp(const RtmpPacket::Ptr &pkt) {
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if (pkt->isConfigFrame()) {
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CHECK_RET(pkt->size() > 5);
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getTrack()->setExtraData((uint8_t *)pkt->data() + 5, pkt->size() - 5);
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return;
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}
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CHECK_RET(pkt->size() > 9);
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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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splitFrame((uint8_t *)pkt->data() + 5, pkt->size() - 5, pkt->time_stamp, pts);
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}
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void H264RtmpDecoder::splitFrame(const uint8_t *data, size_t size, uint32_t dts, uint32_t pts) {
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auto end = data + size;
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while (data + 4 < end) {
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uint32_t frame_len = load_be32(data);
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data += 4;
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if (data + frame_len > end) {
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break;
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}
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outputFrame((const char *)data, frame_len, dts, pts);
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data += frame_len;
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}
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}
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void H264RtmpDecoder::outputFrame(const char *data, size_t len, uint32_t dts, uint32_t pts) {
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auto frame = FrameImp::create<H264Frame>();
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frame->_prefix_size = 4;
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frame->_dts = dts;
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frame->_pts = pts;
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frame->_buffer.assign("\x00\x00\x00\x01", 4); // 添加264头
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frame->_buffer.append(data, len);
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RtmpCodec::inputFrame(frame);
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}
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////////////////////////////////////////////////////////////////////////
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void H264RtmpEncoder::flush() {
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inputFrame(nullptr);
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}
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bool H264RtmpEncoder::inputFrame(const Frame::Ptr &frame) {
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if (!_rtmp_packet) {
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_rtmp_packet = RtmpPacket::create();
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// flags/not config/cts预占位 [AUTO-TRANSLATED:7effb692]
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// flags/not config/cts placeholder
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_rtmp_packet->buffer.resize(5);
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}
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return _merger.inputFrame(frame, [this](uint64_t dts, uint64_t pts, const Buffer::Ptr &, bool have_key_frame) {
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// flags
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_rtmp_packet->buffer[0] = (uint8_t)RtmpVideoCodec::h264 | ((uint8_t)(have_key_frame ? RtmpFrameType::key_frame : RtmpFrameType::inter_frame) << 4);
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_rtmp_packet->buffer[1] = (uint8_t)RtmpH264PacketType::h264_nalu;
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int32_t cts = pts - dts;
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// cts
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set_be24(&_rtmp_packet->buffer[2], cts);
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_rtmp_packet->time_stamp = dts;
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_rtmp_packet->body_size = _rtmp_packet->buffer.size();
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_rtmp_packet->chunk_id = CHUNK_VIDEO;
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_rtmp_packet->stream_index = STREAM_MEDIA;
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_rtmp_packet->type_id = MSG_VIDEO;
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// 输出rtmp packet [AUTO-TRANSLATED:d72e89a7]
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// Output rtmp packet
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RtmpCodec::inputRtmp(_rtmp_packet);
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_rtmp_packet = nullptr;
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}, &_rtmp_packet->buffer);
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}
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void H264RtmpEncoder::makeConfigPacket() {
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auto flags = (uint8_t)RtmpVideoCodec::h264;
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flags |= ((uint8_t)RtmpFrameType::key_frame << 4);
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auto pkt = RtmpPacket::create();
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// header
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pkt->buffer.push_back(flags);
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pkt->buffer.push_back((uint8_t)RtmpH264PacketType::h264_config_header);
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// cts
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pkt->buffer.append("\x0\x0\x0", 3);
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// AVCDecoderConfigurationRecord start
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auto extra_data = getTrack()->getExtraData();
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CHECK(extra_data);
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pkt->buffer.append(extra_data->data(), extra_data->size());
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pkt->body_size = pkt->buffer.size();
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pkt->chunk_id = CHUNK_VIDEO;
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pkt->stream_index = STREAM_MEDIA;
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pkt->time_stamp = 0;
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pkt->type_id = MSG_VIDEO;
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RtmpCodec::inputRtmp(pkt);
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}
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}//namespace mediakit
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