mirror of
https://github.com/ZLMediaKit/ZLMediaKit.git
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250 lines
12 KiB
C++
250 lines
12 KiB
C++
/*
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* TSMaker.h
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*
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* Created on: 2013-6-21
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* Author: root
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*/
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#ifndef TSMAKER_H_
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#define TSMAKER_H_
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#include "CRC/crc32.h"
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#include <string>
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#include <stdio.h>
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#include <stdlib.h>
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#include <iostream>
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#include <string.h>
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#include "Util/File.h"
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using namespace std;
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using namespace ZL::Util;
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#define TS_PACKET_SIZE 188
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#define TS_PACKET_HEADER 4
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#define TS_SYNC_BYTE 0x47
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#define TS_PAT_PID 0x00
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#define TS_PMT_PID 0xFFF
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#define TS_H264_PID 0x100
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#define TS_AAC_PID 0x101
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#define TS_H264_STREAM_ID 0xE0
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#define TS_AAC_STREAM_ID 0xC0
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#define PMT_STREAM_TYPE_VIDEO 0x1B
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#define PMT_STREAM_TYPE_AUDIO 0x0F
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//#define ES_BUF_SIZE 256*1024
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//ts 包头
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typedef struct Tag_PacketHeader {
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unsigned char sync_byte :8; //同步字节, 固定为0x47,表示后面的是一个TS分组
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unsigned char tras_error :1; //传输误码指示符
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unsigned char play_init :1; //有效荷载单元起始指示符
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unsigned char tras_prio :1; //传输优先, 1表示高优先级,传输机制可能用到，解码用不着
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unsigned int PID :13; //PID
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unsigned char tras_scramb :2; //传输加扰控制
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unsigned char ada_field_C :2; //自适应控制 01仅含有效负载，10仅含调整字段，11含有调整字段和有效负载，先调整字段然后有效负载。为00解码器不进行处理
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unsigned char conti_cter :4; //连续计数器 一个4bit的计数器，范围0-15
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} TsPacketHeader;
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//连续性计数器,也就是说 有多少个 pat包，几个pmt包 ，几个MP3 包，几个 h264包，0x00 - 0x0f ，然后折回到0x00
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typedef struct Tag_Continuity_Counter {
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unsigned char continuity_counter_pat;
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unsigned char continuity_counter_pmt;
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unsigned char continuity_counter_video;
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unsigned char continuity_counter_audio;
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} Continuity_Counter;
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//自适应段标志
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typedef struct Tag_Ts_Adaptation_field {
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unsigned char discontinuty_indicator :1; //1表明当前传送流分组的不连续状态为真
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unsigned char random_access_indicator :1; //表明下一个有相同PID的PES分组应该含有PTS字段和一个原始流访问点
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unsigned char elementary_stream_priority_indicator :1; //优先级
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unsigned char PCR_flag :1; //包含pcr字段
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unsigned char OPCR_flag :1; //包含opcr字段
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unsigned char splicing_point_flag :1; //拼接点标志
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unsigned char transport_private_data_flag :1; //私用字节
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unsigned char adaptation_field_extension_flag :1; //调整字段有扩展
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unsigned char adaptation_field_length; //自适应段长度
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unsigned long long pcr; //自适应段中用到的的pcr
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unsigned long long opcr; //自适应段中用到的的opcr
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unsigned char splice_countdown;
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unsigned char private_data_len;
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unsigned char private_data[256];
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} Ts_Adaptation_field;
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//PAT结构体：节目相关表
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typedef struct Tag_TsPat {
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unsigned char table_id :8; //固定为0x00 ，标志是该表是PAT
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unsigned char section_syntax_indicator :1; //段语法标志位，固定为1
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unsigned char zero :1; //0
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unsigned char reserved_1 :2; //保留位
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unsigned int section_length :12; //表示这个字节后面有用的字节数，包括CRC32
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unsigned int transport_stream_id :16; //该传输流的ID，区别于一个网络中其它多路复用的流
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unsigned char reserved_2 :2; //保留位
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unsigned char version_number :5; //范围0-31，表示PAT的版本号
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unsigned char current_next_indicator :1; //发送的PAT是当前有效还是下一个PAT有效
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unsigned char section_number :8; //分段的号码。PAT可能分为多段传输，第一段为00，以后每个分段加1，最多可能有256个分段
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unsigned char last_section_number :8; //最后一个分段的号码
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unsigned int program_number :16; //节目号
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unsigned char reserved_3 :3; //保留位
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//unsigned int network_PID :13 ; //网络信息表（NIT）的PID,节目号为0时对应的PID为network_PID,本例中不含有 networke_pid
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unsigned int program_map_PID :13; //节目映射表的PID，节目号大于0时对应的PID，每个节目对应一个
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unsigned long long CRC_32 :32; //CRC32校验码
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} TsPat;
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//PMT结构体：节目映射表
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typedef struct Tag_TsPmt {
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unsigned char table_id :8; //固定为0x02, 表示PMT表
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unsigned char section_syntax_indicator :1; //固定为0x01
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unsigned char zero :1; //0x00
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unsigned char reserved_1 :2; //0x03
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unsigned int section_length :12; //首先两位bit置为00，它指示段的byte数，由段长度域开始，包含CRC。
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unsigned int program_number :16; // 指出该节目对应于可应用的Program map PID
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unsigned char reserved_2 :2; //0x03
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unsigned char version_number :5; //指出TS流中Program map section的版本号
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unsigned char current_next_indicator :1; //当该位置1时，当前传送的Program map section可用；当该位置0时，指示当前传送的Program map section不可用，下一个TS流的Program map section有效。
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unsigned char section_number :8; //固定为0x00
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unsigned char last_section_number :8; //固定为0x00
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unsigned char reserved_3 :3; //0x07
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unsigned int PCR_PID :13; //指明TS包的PID值，该TS包含有PCR域，该PCR值对应于由节目号指定的对应节目。如果对于私有数据流的节目定义与PCR无关，这个域的值将为0x1FFF。
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unsigned char reserved_4 :4; //预留为0x0F
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unsigned int program_info_length :12; //前两位bit为00。该域指出跟随其后对节目信息的描述的byte数。
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unsigned char stream_type_video :8; //指示特定PID的节目元素包的类型。该处PID由elementary PID指定
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unsigned char reserved_5_video :3; //0x07
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unsigned int elementary_PID_video :13; //该域指示TS包的PID值。这些TS包含有相关的节目元素
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unsigned char reserved_6_video :4; //0x0F
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unsigned int ES_info_length_video :12; //前两位bit为00。该域指示跟随其后的描述相关节目元素的byte数
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unsigned char stream_type_audio :8; //指示特定PID的节目元素包的类型。该处PID由elementary PID指定
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unsigned char reserved_5_audio :3; //0x07
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unsigned int elementary_PID_audio :13; //该域指示TS包的PID值。这些TS包含有相关的节目元素
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unsigned char reserved_6_audio :4; //0x0F
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unsigned int ES_info_length_audio :12; //前两位bit为00。该域指示跟随其后的描述相关节目元素的byte数
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unsigned long long CRC_32 :32; //CRC32校验码
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} TsPmt;
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//PTS_DTS结构体：本程序设置都有 “11”
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typedef struct Tag_TsPtsDts {
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unsigned char reserved_1 :4;
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unsigned char pts_32_30 :3; //显示时间戳
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unsigned char marker_bit1 :1;
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unsigned int pts_29_15 :15;
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unsigned char marker_bit2 :1;
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unsigned int pts_14_0 :15;
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unsigned char marker_bit3 :1;
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unsigned char reserved_2 :4;
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unsigned char dts_32_30 :3; //解码时间戳
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unsigned char marker_bit4 :1;
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unsigned int dts_29_15 :15;
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unsigned char marker_bit5 :1;
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unsigned int dts_14_0 :15;
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unsigned char marker_bit6 :1;
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} TsPtsDts;
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//PES包结构体，包括PES包头和ES数据 ,头 19 个字节
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typedef struct Tag_TsPes {
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unsigned int packet_start_code_prefix :24; //起始：0x000001
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unsigned char stream_id :8; //基本流的类型和编号
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unsigned int PES_packet_length :16; //包长度,就是帧数据的长度，可能为0,要自己算,做多16位，如果超出则需要自己算
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unsigned char marker_bit :2; //必须是：'10'
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unsigned char PES_scrambling_control :2; //pes包有效载荷的加扰方式
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unsigned char PES_priority :1; //有效负载的优先级
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unsigned char data_alignment_indicator :1; //如果设置为1表明PES包的头后面紧跟着视频或音频syncword开始的代码。
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unsigned char copyright :1; //1:靠版权保护，0：不靠
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unsigned char original_or_copy :1; //1;有效负载是原始的，0：有效负载时拷贝的
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unsigned char PTS_DTS_flags :2; //'10'：PTS字段存在，‘11’：PTD和DTS都存在，‘00’：都没有，‘01’：禁用。
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unsigned char ESCR_flag :1; //1:escr基准字段 和 escr扩展字段均存在，0：无任何escr字段存在
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unsigned char ES_rate_flag :1; //1:es_rate字段存在，0 ：不存在
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unsigned char DSM_trick_mode_flag :1; //1;8比特特接方式字段存在，0 ：不存在
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unsigned char additional_copy_info_flag :1; //1:additional_copy_info存在，0: 不存在
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unsigned char PES_CRC_flag :1; //1:crc字段存在，0：不存在
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unsigned char PES_extension_flag :1; //1：扩展字段存在，0：不存在
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unsigned char PES_header_data_length :8; //后面数据的长度，
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//TsPtsDts tsptsdts; //ptsdts结构体对象，10个字节
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char *ES;
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unsigned long ESlen;
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} TsPes;
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/*//H264一帧数据的结构体
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typedef struct Tag_NALU_t {
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unsigned char forbidden_bit; //! Should always be FALSE
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unsigned char nal_reference_idc; //! NALU_PRIORITY_xxxx
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unsigned char nal_unit_type; //! NALU_TYPE_xxxx
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unsigned int startcodeprefix_len; //! 前缀字节数
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unsigned int len; //! 包含nal 头的nal 长度，从第一个00000001到下一个000000001的长度
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unsigned int max_size; //! 做多一个nal 的长度
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unsigned char * buf; //! 包含nal 头的nal 数据
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unsigned int lost_packets; //! 预留
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} NALU_t;*/
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//nal类型
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typedef enum {
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NALU_TYPE_SLICE = 1,
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NALU_TYPE_DPA = 2,
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NALU_TYPE_DPB = 3,
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NALU_TYPE_DPC = 4,
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NALU_TYPE_IDR = 5,
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NALU_TYPE_SEI = 6,
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NALU_TYPE_SPS = 7,
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NALU_TYPE_PPS = 8,
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NALU_TYPE_AUD = 9,
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NALU_TYPE_EOSEQ = 10,
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NALU_TYPE_EOSTREAM = 11,
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NALU_TYPE_FILL = 12,
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#if (MVC_EXTENSION_ENABLE)
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NALU_TYPE_PREFIX = 14,
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NALU_TYPE_SUB_SPS = 15,
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NALU_TYPE_SLC_EXT = 20,
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NALU_TYPE_VDRD = 24 // View and Dependency Representation Delimiter NAL Unit
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#endif
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} NaluType;
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/*//MP3头结构体
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typedef struct Tag_Mp3_Header {
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unsigned int sync :11; //同步信息
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unsigned char version :2; //版本
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unsigned char layer :2; //层
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unsigned char error_protection :1; //CRC校验
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unsigned char bitrate_index :4; //位率
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unsigned char sampling_frequency :2; //采样频率
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unsigned char padding :1; //帧长调节
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unsigned char private_t :1; //保留字
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unsigned char mode :2; //声道模式
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unsigned char mode_extension :2; //扩展模式
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unsigned char copyright :1; //版权
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unsigned char original :1; //原版标志
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unsigned char emphasis :2; //强调模式
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} Mp3_Header;*/
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class TSMaker {
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public:
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TSMaker();
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virtual ~TSMaker();
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bool init(const string &strFilename, uint32_t ui32BufSize);
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int inputH264(const char *pcData, uint32_t ui32Len, uint64_t ui64Time);
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int inputAAC(const char *pcData, uint32_t ui32Len, uint64_t ui64Time);
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void clear();
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private:
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string m_strFilename;
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FILE *m_pOutVideoTs;
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Continuity_Counter m_continuityCounter;
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TsPes *m_pVideo_pes;
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TsPes *m_pAudio_pes;
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unsigned int m_uiWritePacketNum;
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char *m_pcFileBuf;
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void flush();
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void CreateTsHeader(TsPacketHeader * pTsHeader, unsigned int uiPID, unsigned char ucPlayInit, unsigned char ucAdaFieldC);
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void TsHeader2buffer(TsPacketHeader * pTsHeader, unsigned char *pucBuffer);
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void CreatePAT();
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void CreatePMT();
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void WriteAdaptive_flags_Head(Ts_Adaptation_field * pAdaptationField, uint64_t ui64VideoPts);
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void WriteAdaptive_flags_Tail(Ts_Adaptation_field * pAdaptationField); //填写自适应段标志帧尾的
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void PES2TS(TsPes * pPes, unsigned int uiPID, Ts_Adaptation_field * pAdaptationField, uint64_t ui64Pts);
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void CreateAdaptive_Ts(Ts_Adaptation_field * pAdaptationField, unsigned char * pcTs, unsigned int uiAdaptiveLength);
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};
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#endif /* TSMAKER_H_ */
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