kopia lustrzana https://github.com/kierank/libmpegts
368 wiersze
8.4 KiB
C
368 wiersze
8.4 KiB
C
/*****************************************************************************
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* common.h : common data
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*****************************************************************************
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* Copyright (C) 2010 Kieran Kunhya
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02111, USA.
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*****************************************************************************/
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#ifndef LIBMPEGTS_COMMON_H
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#define LIBMPEGTS_COMMON_H
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#include <stdio.h>
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#include <stdlib.h>
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#if HAVE_STDINT_H
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#include <stdint.h>
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#else
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#include <inttypes.h>
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#endif
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#include "bitstream.h"
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#include "libmpegts.h"
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#include <string.h>
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/* Standardised Audio/Video stream_types */
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#define VIDEO_MPEG2 0x02
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#define VIDEO_AVC 0x1b
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#define AUDIO_MPEG1 0x03
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#define AUDIO_MPEG2 0x04
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#define AUDIO_ADTS 0x0f
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#define AUDIO_LATM 0x11
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#define PRIVATE_SECTION 0x05
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#define PRIVATE_DATA 0x06
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#define DATA_SCTE35 0x86
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#define TS_HEADER_SIZE 4
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#define TS_PACKET_SIZE 188
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#define TS_CLOCK 27000000LL
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#define TS_START 10
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#define TIMESTAMP_CLOCK 90000LL
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// arbitrary
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#define MAX_PROGRAMS 100
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#define MAX_STREAMS 100
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/* DVB 40ms recommendation */
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#define PCR_MAX_RETRANS_TIME 40
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#define PAT_MAX_RETRANS_TIME 100
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/* PIDs */
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#define PAT_PID 0x0000
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#define NIT_PID 0x0010
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#define SIT_PID 0x001f
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#define NULL_PID 0xffff
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/* TIDs */
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#define PAT_TID 0x00
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#define PMT_TID 0x02
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#define NIT_TID 0x40
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#define SIT_TID 0x7f
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/* NIT */
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/* ETSI TS 101 162 - Temporary Private Use
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* Used for both "Original Network ID" and "Network ID" */
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#define DEFAULT_NID 0xffff
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/* Program and Program Element Descriptor Tags */
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#define VIDEO_STREAM_DESCRIPTOR_TAG 0x2
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#define AUDIO_STREAM_DESCRIPTOR_TAG 0x3
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#define REGISTRATION_DESCRIPTOR_TAG 0x5
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#define DATA_STREAM_ALIGNMENT_DESCRIPTOR_TAG 0x6
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#define ISO_693_LANGUAGE_DESCRIPTOR_TAG 0xa
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#define PRIVATE_DATA_DESCRIPTOR_TAG 0xe
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#define SMOOTHING_BUFFER_DESCRIPTOR_TAG 0x10
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#define AVC_DESCRIPTOR_TAG 0x28
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#define MPEG2_AAC_AUDIO_DESCRIPTOR 0x2b
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#define SVC_EXTENSION_DESCRIPTOR_TAG 0x30
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#define MVC_EXTENSION_DESCRIPTOR_TAG 0x31
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#define USER_DEFINED_DESCRIPTOR_TAG 0xc4
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#define TB_SIZE 4096
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#define RX_SYS 1000000
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#define R_SYS_DEFAULT 80000
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/* Macros */
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#define BOOLIFY(x) x = !!x
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#define MIN(a,b) ( (a)<(b) ? (a) : (b) )
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#define MAX(a,b) ( (a)>(b) ? (a) : (b) )
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#define IS_VIDEO(x) ( x->stream_format == LIBMPEGTS_VIDEO_MPEG2 || x->stream_format == LIBMPEGTS_VIDEO_AVC || x->stream_format == LIBMPEGTS_VIDEO_DIRAC )
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/* Internal Program & Stream Structures */
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typedef struct
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{
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int level;
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int profile;
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int frame_rate;
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} mpegvideo_stream_ctx_t;
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typedef struct
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{
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int num_channels;
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int sample_rate;
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int bits_per_sample;
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} lpcm_stream_ctx_t;
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typedef struct
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{
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int frame_rate;
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int aspect_ratio;
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} hdmv_video_stream_ctx_t;
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typedef struct
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{
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int sample_rate_code;
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int bsid;
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int bit_rate_code;
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int surround_mode;
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int bsmod;
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int num_channels;
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} ts_atsc_ac3_info;
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/* Blu-Ray DTCP */
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typedef struct
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{
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uint8_t byte_1;
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uint8_t byte_2;
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} ts_dtcp_t;
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typedef struct
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{
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/* in bytes */
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int adapt_field_size;
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int pes_header_size;
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int cur_pos;
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} buffer_queue_t;
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typedef struct
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{
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int buf_size; /* size of buffer */
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int cur_buf; /* current buffer fill */
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double last_byte_removal_time;
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buffer_queue_t queued_packets[10];
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} buffer_t;
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typedef struct
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{
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int pid;
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int cc;
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int stream_format; /* internal stream format type */
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int stream_type; /* stream_type syntax element */
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int stream_id;
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int version_number;
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int64_t last_pkt_pcr;
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/* Stream contexts */
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mpegvideo_stream_ctx_t *mpegvideo_ctx;
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lpcm_stream_ctx_t *lpcm_ctx;
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ts_atsc_ac3_info *atsc_ac3_ctx;
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int num_dvb_sub;
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ts_dvb_sub_t *dvb_sub_ctx;
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int num_dvb_ttx;
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ts_dvb_ttx_t *dvb_ttx_ctx;
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int num_dvb_vbi;
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ts_dvb_vbi_t *dvb_vbi_ctx;
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int num_channels;
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int max_frame_size;
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/* T_STD */
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buffer_t tb; /* transport buffer */
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int rx; /* flow from transport to multiplex buffer (video) or main buffer (audio) */
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buffer_t mb; /* multiplex buffer (video) or main buffer (audio) */
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buffer_t eb; /* elementary buffer */
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int rbx; /* flow from multiplex to elementary buffer (video) */
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/* Language Codes */
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int write_lang_code;
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char lang_code[4];
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int audio_type;
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/* AAC */
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int aac_is_mpeg4;
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int aac_profile;
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int aac_channel_map;
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/* Opus */
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int opus_channel_map;
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/* ATSC */
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/* DVB */
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/* Stream Identifier */
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int has_stream_identifier;
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int stream_identifier;
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/* DVB AU_Information */
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int dvb_au;
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int dvb_au_frame_rate;
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/* ISDB */
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/* CableLabs */
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/* Blu-Ray */
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int hdmv_video_format;
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int hdmv_frame_rate;
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int hdmv_aspect_ratio;
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} ts_int_stream_t;
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typedef struct
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{
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uint8_t *data;
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int size;
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uint8_t *cur_pos;
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int bytes_left;
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/* stream context associated with pes */
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ts_int_stream_t *stream;
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int header_size;
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int random_access;
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int priority;
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int64_t initial_arrival_time;
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int64_t final_arrival_time;
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int64_t dts;
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int64_t pts;
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/* DVB AU_Information specific fields */
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uint8_t frame_type;
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int ref_pic_idc;
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int write_pulldown_info;
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int pic_struct;
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} ts_int_pes_t;
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typedef struct
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{
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ts_int_stream_t pmt;
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int program_num;
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int num_queued_pmt;
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uint8_t **pmt_packets;
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int num_streams;
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ts_int_stream_t *streams[MAX_STREAMS];
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ts_int_stream_t *pcr_stream;
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int pmt_version;
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uint64_t last_pcr;
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int64_t video_dts;
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sdt_program_ctx_t sdt_ctx;
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int is_3dtv;
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int sb_leak_rate;
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int sb_size;
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} ts_int_program_t;
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struct ts_writer_t
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{
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struct
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{
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int i_bitstream;
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uint8_t *p_bitstream;
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bs_t bs;
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} out;
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uint64_t bytes_written;
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uint64_t packets_written;
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uint64_t pcr_start;
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int ts_type;
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int ts_id;
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int cbr;
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int ts_muxrate;
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int lowlatency;
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int pat_cc;
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int num_programs;
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ts_int_program_t *programs[MAX_PROGRAMS];
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int pat_period;
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int pcr_period;
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int sdt_period;
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int first_input;
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int pat_version;
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int network_pid;
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int network_id;
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int num_buffered_frames;
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ts_int_pes_t **buffered_frames;
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int num_pcrs;
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int pcr_list_alloced;
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int64_t *pcr_list;
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/* system control */
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buffer_t tb; /* transport buffer */
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buffer_t main_b; /* main buffer */
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int rx_sys; /* flow from transport to main buffer */
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int r_sys; /* flow from main buffer to system decoder */
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/* CableLabs */
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int legacy_constraints;
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/* DVB-specific */
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ts_int_stream_t *nit;
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ts_int_stream_t *sdt;
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ts_int_stream_t *eit;
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ts_int_stream_t *tdt;
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ts_int_stream_t *sit;
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uint64_t last_pat;
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uint64_t last_pmt;
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uint64_t last_nit;
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uint64_t last_sdt;
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uint64_t last_eit;
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uint64_t last_tdt;
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uint64_t last_sit;
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ts_dtcp_t *dtcp_ctx;
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};
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enum adaptation_field_control_e
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{
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PAYLOAD_ONLY = 1,
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ADAPT_FIELD_ONLY = 2,
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ADAPT_FIELD_AND_PAYLOAD = 3,
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};
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void write_bytes( bs_t *s, uint8_t *bytes, int length );
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void write_packet_header( ts_writer_t *w, bs_t *s, int start, int pid, int adapt_field, int *cc );
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void write_registration_descriptor( bs_t *s, int descriptor_tag, int descriptor_length, char *format_id );
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void write_crc( bs_t *s, int start );
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int write_padding( bs_t *s, int start );
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int increase_pcr( ts_writer_t *w, int num_packets, int imaginary );
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ts_int_stream_t *find_stream( ts_writer_t *w, int pid );
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#endif
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