mirror of
https://github.com/ZLMediaKit/ZLMediaKit.git
synced 2024-11-29 22:55:52 +08:00
353 lines
9.2 KiB
C++
353 lines
9.2 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 "Util/util.h"
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#include "Util/logger.h"
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#include "Network/Buffer.h"
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#include "Network/sockutil.h"
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#include "amf.h"
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#include "Extension/Track.h"
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using namespace toolkit;
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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_SERVER_REQUEST 2 /*服务器像客户端发出请求时的chunkID*/
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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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_time = htonl(_time);
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memcpy(time_stamp, &_time, 4);
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if (!_random) {
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random_generate((char *) random, sizeof(random));
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} else {
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memcpy(random, _random, sizeof(random));
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}
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}
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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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static char cdata[] = {0x73, 0x69, 0x6d, 0x70, 0x6c, 0x65, 0x2d, 0x72,
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0x74, 0x6d, 0x70, 0x2d, 0x73, 0x65, 0x72, 0x76, 0x65, 0x72,
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0x2d, 0x77, 0x69, 0x6e, 0x6c, 0x69, 0x6e, 0x2d, 0x77, 0x69,
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0x6e, 0x74, 0x65, 0x72, 0x73, 0x65, 0x72, 0x76, 0x65, 0x72,
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0x40, 0x31, 0x32, 0x36, 0x2e, 0x63, 0x6f, 0x6d};
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for (int i = 0; i < size; i++) {
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bytes[i] = cdata[rand() % (sizeof(cdata) - 1)];
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}
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}
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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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//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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} 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 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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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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is_abs_stamp = false;
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time_stamp = 0;
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ts_field = 0;
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body_size = 0;
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buffer.clear();
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}
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bool isVideoKeyFrame() const {
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return type_id == MSG_VIDEO && (uint8_t) buffer[0] >> 4 == FLV_KEY_FRAME && (uint8_t) buffer[1] == 1;
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}
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bool isCfgFrame() const {
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switch (type_id){
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case MSG_VIDEO : return buffer[1] == 0;
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case MSG_AUDIO : {
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switch (getMediaType()){
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case FLV_CODEC_AAC : return buffer[1] == 0;
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default : return false;
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}
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}
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default : return false;
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}
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}
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int getMediaType() const {
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switch (type_id) {
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case MSG_VIDEO : return (uint8_t) buffer[0] & 0x0F;
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case MSG_AUDIO : return (uint8_t) buffer[0] >> 4;
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default : return 0;
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}
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}
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int getAudioSampleRate() const {
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if (type_id != MSG_AUDIO) {
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return 0;
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}
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int flvSampleRate = ((uint8_t) buffer[0] & 0x0C) >> 2;
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const static int sampleRate[] = { 5512, 11025, 22050, 44100 };
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return sampleRate[flvSampleRate];
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}
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int getAudioSampleBit() const {
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if (type_id != MSG_AUDIO) {
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return 0;
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}
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int flvSampleBit = ((uint8_t) buffer[0] & 0x02) >> 1;
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const static int sampleBit[] = { 8, 16 };
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return sampleBit[flvSampleBit];
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}
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int getAudioChannel() const {
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if (type_id != MSG_AUDIO) {
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return 0;
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}
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int flvStereoOrMono = (uint8_t) buffer[0] & 0x01;
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const static int channel[] = { 1, 2 };
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return channel[flvStereoOrMono];
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}
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private:
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friend class 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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is_abs_stamp = that.is_abs_stamp;
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stream_index = that.stream_index;
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body_size = that.body_size;
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type_id = that.type_id;
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ts_field = that.ts_field;
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time_stamp = that.time_stamp;
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return *this;
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}
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private:
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//对象个数统计
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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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typedef std::shared_ptr<Metadata> Ptr;
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Metadata():_metadata(AMF_OBJECT){}
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virtual ~Metadata(){}
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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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typedef std::shared_ptr<TitleMeta> Ptr;
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TitleMeta(float dur_sec = 0,
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size_t fileSize = 0,
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const map<string,string> &header = map<string,string>()){
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_metadata.set("duration", dur_sec);
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_metadata.set("fileSize", (int)fileSize);
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_metadata.set("server",SERVER_NAME);
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for (auto &pr : header){
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_metadata.set(pr.first, pr.second);
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}
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}
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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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typedef std::shared_ptr<VideoMeta> Ptr;
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VideoMeta(const VideoTrack::Ptr &video);
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virtual ~VideoMeta(){}
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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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typedef std::shared_ptr<AudioMeta> Ptr;
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AudioMeta(const AudioTrack::Ptr &audio);
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virtual ~AudioMeta(){}
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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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