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ZLMediaKit/src/Rtmp/Rtmp.h

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/*
* MIT License
*
* Copyright (c) 2016 xiongziliang <771730766@qq.com>
*
* This file is part of ZLMediaKit(https://github.com/xiongziliang/ZLMediaKit).
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#ifndef __rtmp_h
#define __rtmp_h
#include <memory>
#include <string>
#include <cstdlib>
#include "Util/util.h"
#include "Util/logger.h"
#include "Network/Buffer.h"
#include "Network/sockutil.h"
using namespace toolkit;
#define PORT 1935
#define DEFAULT_CHUNK_LEN 128
#if !defined(_WIN32)
#define PACKED __attribute__((packed))
#else
#define PACKED
#endif //!defined(_WIN32)
#define HANDSHAKE_PLAINTEXT 0x03
#define RANDOM_LEN (1536 - 8)
#define MSG_SET_CHUNK 1 /*Set Chunk Size (1)*/
#define MSG_ABORT 2 /*Abort Message (2)*/
#define MSG_ACK 3 /*Acknowledgement (3)*/
#define MSG_USER_CONTROL 4 /*User Control Messages (4)*/
#define MSG_WIN_SIZE 5 /*Window Acknowledgement Size (5)*/
#define MSG_SET_PEER_BW 6 /*Set Peer Bandwidth (6)*/
#define MSG_AUDIO 8 /*Audio Message (8)*/
#define MSG_VIDEO 9 /*Video Message (9)*/
#define MSG_DATA 18 /*Data Message (18, 15) AMF0*/
#define MSG_DATA3 15 /*Data Message (18, 15) AMF3*/
#define MSG_CMD 20 /*Command Message AMF0 */
#define MSG_CMD3 17 /*Command Message AMF3 */
#define MSG_OBJECT3 16 /*Shared Object Message (19, 16) AMF3*/
#define MSG_OBJECT 19 /*Shared Object Message (19, 16) AMF0*/
#define MSG_AGGREGATE 22 /*Aggregate Message (22)*/
#define CONTROL_STREAM_BEGIN 0
#define CONTROL_STREAM_EOF 1
#define CONTROL_STREAM_DRY 2
#define CONTROL_SETBUFFER 3
#define CONTROL_STREAM_ISRECORDED 4
#define CONTROL_PING_REQUEST 6
#define CONTROL_PING_RESPONSE 7
#define STREAM_CONTROL 0
#define STREAM_MEDIA 1
#define CHUNK_SERVER_REQUEST 2 /*服务器像客户端发出请求时的chunkID*/
#define CHUNK_CLIENT_REQUEST_BEFORE 3 /*客户端在createStream前,向服务器发出请求的chunkID*/
#define CHUNK_CLIENT_REQUEST_AFTER 4 /*客户端在createStream后,向服务器发出请求的chunkID*/
#define CHUNK_AUDIO 6 /*音频chunkID*/
#define CHUNK_VIDEO 7 /*视频chunkID*/
#define FLV_KEY_FRAME 1
#define FLV_INTER_FRAME 2
#if defined(_WIN32)
#pragma pack(push, 1)
#endif // defined(_WIN32)
class RtmpHandshake {
public:
RtmpHandshake(uint32_t _time, uint8_t *_random = nullptr) {
_time = htonl(_time);
memcpy(timeStamp, &_time, 4);
if (!_random) {
random_generate((char *) random, sizeof(random));
} else {
memcpy(random, _random, sizeof(random));
}
}
uint8_t timeStamp[4];
uint8_t zero[4] = {0};
uint8_t random[RANDOM_LEN];
void random_generate(char* bytes, int size) {
static char cdata[] = { 0x73, 0x69, 0x6d, 0x70, 0x6c, 0x65, 0x2d, 0x72,
0x74, 0x6d, 0x70, 0x2d, 0x73, 0x65, 0x72, 0x76, 0x65, 0x72,
0x2d, 0x77, 0x69, 0x6e, 0x6c, 0x69, 0x6e, 0x2d, 0x77, 0x69,
0x6e, 0x74, 0x65, 0x72, 0x73, 0x65, 0x72, 0x76, 0x65, 0x72,
0x40, 0x31, 0x32, 0x36, 0x2e, 0x63, 0x6f, 0x6d };
for (int i = 0; i < size; i++) {
bytes[i] = cdata[rand() % (sizeof(cdata) - 1)];
}
}
}PACKED;
class RtmpHeader {
public:
uint8_t flags;
uint8_t timeStamp[3];
uint8_t bodySize[3];
uint8_t typeId;
uint8_t streamId[4]; /* Note, this is little-endian while others are BE */
}PACKED;
#if defined(_WIN32)
#pragma pack(pop)
#endif // defined(_WIN32)
class RtmpPacket : public Buffer{
public:
typedef std::shared_ptr<RtmpPacket> Ptr;
uint8_t typeId;
uint32_t bodySize = 0;
uint32_t timeStamp = 0;
bool hasAbsStamp = false;
bool hasExtStamp = false;
uint32_t deltaStamp = 0;
uint32_t streamId;
uint32_t chunkId;
std::string strBuf;
public:
char *data() const override{
return (char*)strBuf.data();
}
uint32_t size() const override {
return strBuf.size();
};
public:
RtmpPacket() = default;
RtmpPacket(const RtmpPacket &that) = default;
RtmpPacket &operator=(const RtmpPacket &that) = default;
RtmpPacket &operator=(RtmpPacket &&that) = default;
RtmpPacket(RtmpPacket &&that){
typeId = that.typeId;
bodySize = that.bodySize;
timeStamp = that.timeStamp;
hasAbsStamp = that.hasAbsStamp;
hasExtStamp = that.hasExtStamp;
deltaStamp = that.deltaStamp;
streamId = that.streamId;
chunkId = that.chunkId;
strBuf = std::move(that.strBuf);
}
bool isVideoKeyFrame() const {
return typeId == MSG_VIDEO && (uint8_t) strBuf[0] >> 4 == FLV_KEY_FRAME
&& (uint8_t) strBuf[1] == 1;
}
bool isCfgFrame() const {
return (typeId == MSG_VIDEO || typeId == MSG_AUDIO)
&& (uint8_t) strBuf[1] == 0;
}
int getMediaType() const {
switch (typeId) {
case MSG_VIDEO: {
return (uint8_t) strBuf[0] & 0x0F;
}
break;
case MSG_AUDIO: {
return (uint8_t) strBuf[0] >> 4;
}
break;
default:
break;
}
return 0;
}
int getAudioSampleRate() const {
if (typeId != MSG_AUDIO) {
return 0;
}
int flvSampleRate = ((uint8_t) strBuf[0] & 0x0C) >> 2;
const static int sampleRate[] = { 5512, 11025, 22050, 44100 };
return sampleRate[flvSampleRate];
}
int getAudioSampleBit() const {
if (typeId != MSG_AUDIO) {
return 0;
}
int flvSampleBit = ((uint8_t) strBuf[0] & 0x02) >> 1;
const static int sampleBit[] = { 8, 16 };
return sampleBit[flvSampleBit];
}
int getAudioChannel() const {
if (typeId != MSG_AUDIO) {
return 0;
}
int flvStereoOrMono = (uint8_t) strBuf[0] & 0x01;
const static int channel[] = { 1, 2 };
return channel[flvStereoOrMono];
}
/**
* 返回不带0x00 00 00 01头的sps
* @return
*/
string getH264SPS() const {
string ret;
if (getMediaType() != 7) {
return ret;
}
if (!isCfgFrame()) {
return ret;
}
if (strBuf.size() < 13) {
WarnL << "bad H264 cfg!";
return ret;
}
uint16_t sps_size ;
memcpy(&sps_size,strBuf.data() + 11,2);
sps_size = ntohs(sps_size);
if ((int) strBuf.size() < 13 + sps_size) {
WarnL << "bad H264 cfg!";
return ret;
}
ret.assign(strBuf.data() + 13, sps_size);
return ret;
}
/**
* 返回不带0x00 00 00 01头的pps
* @return
*/
string getH264PPS() const {
string ret;
if (getMediaType() != 7) {
return ret;
}
if (!isCfgFrame()) {
return ret;
}
if (strBuf.size() < 13) {
WarnL << "bad H264 cfg!";
return ret;
}
uint16_t sps_size ;
memcpy(&sps_size,strBuf.data() + 11,2);
sps_size = ntohs(sps_size);
if ((int) strBuf.size() < 13 + sps_size + 1 + 2) {
WarnL << "bad H264 cfg!";
return ret;
}
uint16_t pps_size ;
memcpy(&pps_size,strBuf.data() + 13 + sps_size + 1,2);
pps_size = ntohs(pps_size);
if ((int) strBuf.size() < 13 + sps_size + 1 + 2 + pps_size) {
WarnL << "bad H264 cfg!";
return ret;
}
ret.assign(strBuf.data() + 13 + sps_size + 1 + 2, pps_size);
return ret;
}
string getAacCfg() const {
string ret;
if (getMediaType() != 10) {
return ret;
}
if (!isCfgFrame()) {
return ret;
}
if (strBuf.size() < 4) {
WarnL << "bad aac cfg!";
return ret;
}
ret = strBuf.substr(2, 2);
return ret;
}
};
#endif
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