274 lines
6.8 KiB
C++
274 lines
6.8 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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#ifndef __rtmp_h
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#define __rtmp_h
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#include <memory>
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#include <string>
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#include <cstdlib>
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#include "amf.h"
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#include "Network/Buffer.h"
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#include "Extension/Track.h"
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#if !defined(_WIN32)
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#define PACKED __attribute__((packed))
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#else
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#define PACKED
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#endif //!defined(_WIN32)
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#define DEFAULT_CHUNK_LEN 128
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#define HANDSHAKE_PLAINTEXT 0x03
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#define RANDOM_LEN (1536 - 8)
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#define MSG_SET_CHUNK 1 /*Set Chunk Size (1)*/
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#define MSG_ABORT 2 /*Abort Message (2)*/
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#define MSG_ACK 3 /*Acknowledgement (3)*/
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#define MSG_USER_CONTROL 4 /*User Control Messages (4)*/
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#define MSG_WIN_SIZE 5 /*Window Acknowledgement Size (5)*/
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#define MSG_SET_PEER_BW 6 /*Set Peer Bandwidth (6)*/
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#define MSG_AUDIO 8 /*Audio Message (8)*/
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#define MSG_VIDEO 9 /*Video Message (9)*/
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#define MSG_DATA 18 /*Data Message (18, 15) AMF0*/
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#define MSG_DATA3 15 /*Data Message (18, 15) AMF3*/
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#define MSG_CMD 20 /*Command Message AMF0 */
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#define MSG_CMD3 17 /*Command Message AMF3 */
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#define MSG_OBJECT3 16 /*Shared Object Message (19, 16) AMF3*/
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#define MSG_OBJECT 19 /*Shared Object Message (19, 16) AMF0*/
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#define MSG_AGGREGATE 22 /*Aggregate Message (22)*/
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#define CONTROL_STREAM_BEGIN 0
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#define CONTROL_STREAM_EOF 1
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#define CONTROL_STREAM_DRY 2
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#define CONTROL_SETBUFFER 3
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#define CONTROL_STREAM_ISRECORDED 4
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#define CONTROL_PING_REQUEST 6
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#define CONTROL_PING_RESPONSE 7
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#define STREAM_CONTROL 0
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#define STREAM_MEDIA 1
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#define CHUNK_NETWORK 2 /*网络相关的消息(参见 Protocol Control Messages)*/
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#define CHUNK_SYSTEM 3 /*向服务器发送控制消息(反之亦可)*/
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#define CHUNK_CLIENT_REQUEST_BEFORE 3 /*客户端在createStream前,向服务器发出请求的chunkID*/
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#define CHUNK_CLIENT_REQUEST_AFTER 4 /*客户端在createStream后,向服务器发出请求的chunkID*/
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#define CHUNK_AUDIO 6 /*音频chunkID*/
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#define CHUNK_VIDEO 7 /*视频chunkID*/
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#define FLV_KEY_FRAME 1
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#define FLV_INTER_FRAME 2
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#define FLV_CODEC_AAC 10
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#define FLV_CODEC_H264 7
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//金山扩展: https://github.com/ksvc/FFmpeg/wiki
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#define FLV_CODEC_H265 12
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#define FLV_CODEC_G711A 7
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#define FLV_CODEC_G711U 8
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//参考学而思网校: https://github.com/notedit/rtmp/commit/6e314ac5b29611431f8fb5468596b05815743c10
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#define FLV_CODEC_OPUS 13
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namespace mediakit {
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#if defined(_WIN32)
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#pragma pack(push, 1)
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#endif // defined(_WIN32)
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class RtmpHandshake {
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public:
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RtmpHandshake(uint32_t _time, uint8_t *_random = nullptr);
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uint8_t time_stamp[4];
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uint8_t zero[4] = {0};
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uint8_t random[RANDOM_LEN];
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void random_generate(char *bytes, int size);
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void create_complex_c0c1();
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}PACKED;
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class RtmpHeader {
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public:
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#if __BYTE_ORDER == __BIG_ENDIAN
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uint8_t fmt : 2;
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uint8_t chunk_id : 6;
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#else
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uint8_t chunk_id : 6;
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//0、1、2、3分别对应 12、8、4、1长度
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uint8_t fmt : 2;
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#endif
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uint8_t time_stamp[3];
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uint8_t body_size[3];
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uint8_t type_id;
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uint8_t stream_index[4]; /* Note, this is little-endian while others are BE */
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}PACKED;
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class FLVHeader {
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public:
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static constexpr uint8_t kFlvVersion = 1;
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static constexpr uint8_t kFlvHeaderLength = 9;
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//FLV
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char flv[3];
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//File version (for example, 0x01 for FLV version 1)
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uint8_t version;
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#if __BYTE_ORDER == __BIG_ENDIAN
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//保留,置0
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uint8_t : 5;
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//是否有音频
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uint8_t have_audio: 1;
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//保留,置0
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uint8_t : 1;
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//是否有视频
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uint8_t have_video: 1;
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#else
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//是否有视频
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uint8_t have_video: 1;
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//保留,置0
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uint8_t : 1;
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//是否有音频
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uint8_t have_audio: 1;
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//保留,置0
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uint8_t : 5;
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#endif
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//The length of this header in bytes,固定为9
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uint32_t length;
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//固定为0
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uint32_t previous_tag_size0;
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} PACKED;
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class RtmpTagHeader {
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public:
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uint8_t type = 0;
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uint8_t data_size[3] = {0};
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uint8_t timestamp[3] = {0};
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uint8_t timestamp_ex = 0;
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uint8_t streamid[3] = {0}; /* Always 0. */
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} PACKED;
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#if defined(_WIN32)
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#pragma pack(pop)
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#endif // defined(_WIN32)
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class RtmpPacket : public toolkit::Buffer{
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public:
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friend class RtmpProtocol;
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using Ptr = std::shared_ptr<RtmpPacket>;
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bool is_abs_stamp;
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uint8_t type_id;
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uint32_t time_stamp;
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uint32_t ts_field;
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uint32_t stream_index;
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uint32_t chunk_id;
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size_t body_size;
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toolkit::BufferLikeString buffer;
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public:
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static Ptr create();
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char *data() const override{
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return (char*)buffer.data();
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}
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size_t size() const override {
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return buffer.size();
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}
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void clear();
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bool isVideoKeyFrame() const;
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bool isCfgFrame() const;
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int getMediaType() const;
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int getAudioSampleRate() const;
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int getAudioSampleBit() const;
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int getAudioChannel() const;
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private:
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friend class toolkit::ResourcePool_l<RtmpPacket>;
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RtmpPacket(){
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clear();
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}
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RtmpPacket &operator=(const RtmpPacket &that);
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private:
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//对象个数统计
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toolkit::ObjectStatistic<RtmpPacket> _statistic;
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};
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/**
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* rtmp metadata基类，用于描述rtmp格式信息
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*/
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class Metadata : public CodecInfo{
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public:
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using Ptr = std::shared_ptr<Metadata>;
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Metadata(): _metadata(AMF_OBJECT) {}
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virtual ~Metadata() = default;
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const AMFValue &getMetadata() const{
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return _metadata;
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}
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static void addTrack(AMFValue &metadata, const Track::Ptr &track);
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protected:
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AMFValue _metadata;
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};
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/**
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* metadata中除音视频外的其他描述部分
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*/
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class TitleMeta : public Metadata{
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public:
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using Ptr = std::shared_ptr<TitleMeta>;
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TitleMeta(float dur_sec = 0,
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size_t fileSize = 0,
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const std::map<std::string, std::string> &header = std::map<std::string, std::string>());
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CodecId getCodecId() const override{
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return CodecInvalid;
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}
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};
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class VideoMeta : public Metadata{
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public:
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using Ptr = std::shared_ptr<VideoMeta>;
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VideoMeta(const VideoTrack::Ptr &video);
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virtual ~VideoMeta() = default;
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CodecId getCodecId() const override{
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return _codecId;
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}
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private:
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CodecId _codecId;
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};
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class AudioMeta : public Metadata{
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public:
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using Ptr = std::shared_ptr<AudioMeta>;
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AudioMeta(const AudioTrack::Ptr &audio);
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virtual ~AudioMeta() = default;
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CodecId getCodecId() const override{
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return _codecId;
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}
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private:
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CodecId _codecId;
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};
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//根据音频track获取flags
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uint8_t getAudioRtmpFlags(const Track::Ptr &track);
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}//namespace mediakit
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#endif//__rtmp_h
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