2054 lines
75 KiB
C
Executable File
2054 lines
75 KiB
C
Executable File
/*
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* MPEG-2 transport stream (aka DVB) muxer
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* Copyright (c) 2003 Fabrice Bellard
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg 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 GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "libavutil/avassert.h"
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#include "libavutil/bswap.h"
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#include "libavutil/crc.h"
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#include "libavutil/dict.h"
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#include "libavutil/intreadwrite.h"
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#include "libavutil/mathematics.h"
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#include "libavutil/opt.h"
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#include "libavcodec/internal.h"
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#include "avformat.h"
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#include "avio_internal.h"
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#include "internal.h"
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#include "mpegts.h"
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#define PCR_TIME_BASE 27000000
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/* write DVB SI sections */
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#define DVB_PRIVATE_NETWORK_START 0xff01
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/*********************************************/
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/* mpegts section writer */
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typedef struct MpegTSSection {
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int pid;
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int cc;
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int discontinuity;
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void (*write_packet)(struct MpegTSSection *s, const uint8_t *packet);
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void *opaque;
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} MpegTSSection;
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typedef struct MpegTSService {
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MpegTSSection pmt; /* MPEG-2 PMT table context */
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int sid; /* service ID */
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uint8_t name[256];
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uint8_t provider_name[256];
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int pcr_pid;
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AVProgram *program;
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} MpegTSService;
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// service_type values as defined in ETSI 300 468
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enum {
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MPEGTS_SERVICE_TYPE_DIGITAL_TV = 0x01,
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MPEGTS_SERVICE_TYPE_DIGITAL_RADIO = 0x02,
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MPEGTS_SERVICE_TYPE_TELETEXT = 0x03,
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MPEGTS_SERVICE_TYPE_ADVANCED_CODEC_DIGITAL_RADIO = 0x0A,
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MPEGTS_SERVICE_TYPE_MPEG2_DIGITAL_HDTV = 0x11,
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MPEGTS_SERVICE_TYPE_ADVANCED_CODEC_DIGITAL_SDTV = 0x16,
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MPEGTS_SERVICE_TYPE_ADVANCED_CODEC_DIGITAL_HDTV = 0x19,
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MPEGTS_SERVICE_TYPE_HEVC_DIGITAL_HDTV = 0x1F,
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};
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typedef struct MpegTSWrite {
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const AVClass *av_class;
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MpegTSSection pat; /* MPEG-2 PAT table */
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MpegTSSection sdt; /* MPEG-2 SDT table context */
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MpegTSService **services;
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int64_t sdt_period; /* SDT period in PCR time base */
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int64_t pat_period; /* PAT/PMT period in PCR time base */
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int nb_services;
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int64_t first_pcr;
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int64_t next_pcr;
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int mux_rate; ///< set to 1 when VBR
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int pes_payload_size;
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int transport_stream_id;
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int original_network_id;
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int service_id;
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int service_type;
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int pmt_start_pid;
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int start_pid;
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int m2ts_mode;
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int m2ts_video_pid;
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int m2ts_audio_pid;
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int m2ts_pgssub_pid;
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int m2ts_textsub_pid;
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int pcr_period_ms;
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#define MPEGTS_FLAG_REEMIT_PAT_PMT 0x01
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#define MPEGTS_FLAG_AAC_LATM 0x02
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#define MPEGTS_FLAG_PAT_PMT_AT_FRAMES 0x04
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#define MPEGTS_FLAG_SYSTEM_B 0x08
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#define MPEGTS_FLAG_DISCONT 0x10
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int flags;
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int copyts;
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int tables_version;
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int64_t pat_period_us;
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int64_t sdt_period_us;
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int64_t last_pat_ts;
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int64_t last_sdt_ts;
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int omit_video_pes_length;
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} MpegTSWrite;
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/* a PES packet header is generated every DEFAULT_PES_HEADER_FREQ packets */
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#define DEFAULT_PES_HEADER_FREQ 16
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#define DEFAULT_PES_PAYLOAD_SIZE ((DEFAULT_PES_HEADER_FREQ - 1) * 184 + 170)
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/* The section length is 12 bits. The first 2 are set to 0, the remaining
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* 10 bits should not exceed 1021. */
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#define SECTION_LENGTH 1020
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/* NOTE: 4 bytes must be left at the end for the crc32 */
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static void mpegts_write_section(MpegTSSection *s, uint8_t *buf, int len)
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{
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unsigned int crc;
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unsigned char packet[TS_PACKET_SIZE];
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const unsigned char *buf_ptr;
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unsigned char *q;
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int first, b, len1, left;
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crc = av_bswap32(av_crc(av_crc_get_table(AV_CRC_32_IEEE),
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-1, buf, len - 4));
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buf[len - 4] = (crc >> 24) & 0xff;
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buf[len - 3] = (crc >> 16) & 0xff;
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buf[len - 2] = (crc >> 8) & 0xff;
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buf[len - 1] = crc & 0xff;
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/* send each packet */
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buf_ptr = buf;
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while (len > 0) {
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first = buf == buf_ptr;
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q = packet;
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*q++ = 0x47;
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b = s->pid >> 8;
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if (first)
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b |= 0x40;
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*q++ = b;
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*q++ = s->pid;
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s->cc = s->cc + 1 & 0xf;
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*q++ = 0x10 | s->cc;
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if (s->discontinuity) {
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q[-1] |= 0x20;
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*q++ = 1;
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*q++ = 0x80;
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s->discontinuity = 0;
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}
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if (first)
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*q++ = 0; /* 0 offset */
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len1 = TS_PACKET_SIZE - (q - packet);
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if (len1 > len)
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len1 = len;
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memcpy(q, buf_ptr, len1);
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q += len1;
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/* add known padding data */
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left = TS_PACKET_SIZE - (q - packet);
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if (left > 0)
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memset(q, 0xff, left);
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s->write_packet(s, packet);
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buf_ptr += len1;
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len -= len1;
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}
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}
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static inline void put16(uint8_t **q_ptr, int val)
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{
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uint8_t *q;
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q = *q_ptr;
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*q++ = val >> 8;
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*q++ = val;
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*q_ptr = q;
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}
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static int mpegts_write_section1(MpegTSSection *s, int tid, int id,
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int version, int sec_num, int last_sec_num,
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uint8_t *buf, int len)
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{
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uint8_t section[1024], *q;
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unsigned int tot_len;
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/* reserved_future_use field must be set to 1 for SDT */
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unsigned int flags = tid == SDT_TID ? 0xf000 : 0xb000;
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tot_len = 3 + 5 + len + 4;
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/* check if not too big */
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if (tot_len > 1024)
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return AVERROR_INVALIDDATA;
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q = section;
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*q++ = tid;
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put16(&q, flags | (len + 5 + 4)); /* 5 byte header + 4 byte CRC */
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put16(&q, id);
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*q++ = 0xc1 | (version << 1); /* current_next_indicator = 1 */
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*q++ = sec_num;
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*q++ = last_sec_num;
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memcpy(q, buf, len);
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mpegts_write_section(s, section, tot_len);
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return 0;
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}
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/*********************************************/
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/* mpegts writer */
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#define DEFAULT_PROVIDER_NAME "FFmpeg"
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#define DEFAULT_SERVICE_NAME "Service"
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/* we retransmit the SI info at this rate */
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#define SDT_RETRANS_TIME 500
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#define PAT_RETRANS_TIME 100
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#define PCR_RETRANS_TIME 20
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typedef struct MpegTSWriteStream {
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int pid; /* stream associated pid */
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int cc;
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int discontinuity;
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int payload_size;
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int first_pts_check; ///< first pts check needed
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int prev_payload_key;
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int64_t payload_pts;
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int64_t payload_dts;
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int payload_flags;
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uint8_t *payload;
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AVFormatContext *amux;
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int data_st_warning;
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int64_t pcr_period; /* PCR period in PCR time base */
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int64_t last_pcr;
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/* For Opus */
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int opus_queued_samples;
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int opus_pending_trim_start;
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} MpegTSWriteStream;
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static void mpegts_write_pat(AVFormatContext *s)
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{
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MpegTSWrite *ts = s->priv_data;
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MpegTSService *service;
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uint8_t data[SECTION_LENGTH], *q;
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int i;
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q = data;
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for (i = 0; i < ts->nb_services; i++) {
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service = ts->services[i];
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put16(&q, service->sid);
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put16(&q, 0xe000 | service->pmt.pid);
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}
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mpegts_write_section1(&ts->pat, PAT_TID, ts->transport_stream_id, ts->tables_version, 0, 0,
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data, q - data);
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}
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static void putbuf(uint8_t **q_ptr, const uint8_t *buf, size_t len)
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{
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memcpy(*q_ptr, buf, len);
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*q_ptr += len;
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}
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static void put_registration_descriptor(uint8_t **q_ptr, uint32_t tag)
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{
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uint8_t *q = *q_ptr;
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*q++ = 0x05; /* MPEG-2 registration descriptor*/
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*q++ = 4;
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*q++ = tag;
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*q++ = tag >> 8;
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*q++ = tag >> 16;
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*q++ = tag >> 24;
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*q_ptr = q;
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}
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static int get_dvb_stream_type(AVFormatContext *s, AVStream *st)
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{
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MpegTSWrite *ts = s->priv_data;
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MpegTSWriteStream *ts_st = st->priv_data;
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int stream_type;
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switch (st->codecpar->codec_id) {
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case AV_CODEC_ID_MPEG1VIDEO:
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case AV_CODEC_ID_MPEG2VIDEO:
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stream_type = STREAM_TYPE_VIDEO_MPEG2;
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break;
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case AV_CODEC_ID_MPEG4:
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stream_type = STREAM_TYPE_VIDEO_MPEG4;
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break;
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case AV_CODEC_ID_H264:
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stream_type = STREAM_TYPE_VIDEO_H264;
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break;
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case AV_CODEC_ID_HEVC:
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stream_type = STREAM_TYPE_VIDEO_HEVC;
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break;
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case AV_CODEC_ID_CAVS:
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stream_type = STREAM_TYPE_VIDEO_CAVS;
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break;
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case AV_CODEC_ID_DIRAC:
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stream_type = STREAM_TYPE_VIDEO_DIRAC;
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break;
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case AV_CODEC_ID_VC1:
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stream_type = STREAM_TYPE_VIDEO_VC1;
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break;
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case AV_CODEC_ID_MP2:
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case AV_CODEC_ID_MP3:
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if ( st->codecpar->sample_rate > 0
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&& st->codecpar->sample_rate < 32000) {
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stream_type = STREAM_TYPE_AUDIO_MPEG2;
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} else {
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stream_type = STREAM_TYPE_AUDIO_MPEG1;
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}
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break;
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case AV_CODEC_ID_AAC:
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stream_type = (ts->flags & MPEGTS_FLAG_AAC_LATM)
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? STREAM_TYPE_AUDIO_AAC_LATM
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: STREAM_TYPE_AUDIO_AAC;
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break;
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case AV_CODEC_ID_AAC_LATM:
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stream_type = STREAM_TYPE_AUDIO_AAC_LATM;
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break;
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case AV_CODEC_ID_AC3:
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stream_type = (ts->flags & MPEGTS_FLAG_SYSTEM_B)
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? STREAM_TYPE_PRIVATE_DATA
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: STREAM_TYPE_AUDIO_AC3;
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break;
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case AV_CODEC_ID_EAC3:
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stream_type = (ts->flags & MPEGTS_FLAG_SYSTEM_B)
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? STREAM_TYPE_PRIVATE_DATA
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: STREAM_TYPE_AUDIO_EAC3;
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break;
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case AV_CODEC_ID_DTS:
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stream_type = STREAM_TYPE_AUDIO_DTS;
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break;
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case AV_CODEC_ID_TRUEHD:
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stream_type = STREAM_TYPE_AUDIO_TRUEHD;
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break;
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case AV_CODEC_ID_OPUS:
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stream_type = STREAM_TYPE_PRIVATE_DATA;
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break;
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case AV_CODEC_ID_TIMED_ID3:
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stream_type = STREAM_TYPE_METADATA;
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break;
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case AV_CODEC_ID_DVB_SUBTITLE:
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case AV_CODEC_ID_DVB_TELETEXT:
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stream_type = STREAM_TYPE_PRIVATE_DATA;
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break;
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case AV_CODEC_ID_SMPTE_KLV:
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if (st->codecpar->profile == FF_PROFILE_KLVA_SYNC) {
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stream_type = STREAM_TYPE_METADATA;
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} else {
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stream_type = STREAM_TYPE_PRIVATE_DATA;
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}
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break;
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default:
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av_log_once(s, AV_LOG_WARNING, AV_LOG_DEBUG, &ts_st->data_st_warning,
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"Stream %d, codec %s, is muxed as a private data stream "
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"and may not be recognized upon reading.\n", st->index,
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avcodec_get_name(st->codecpar->codec_id));
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stream_type = STREAM_TYPE_PRIVATE_DATA;
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break;
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}
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return stream_type;
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}
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static int get_m2ts_stream_type(AVFormatContext *s, AVStream *st)
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{
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int stream_type;
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MpegTSWriteStream *ts_st = st->priv_data;
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switch (st->codecpar->codec_id) {
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case AV_CODEC_ID_MPEG2VIDEO:
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stream_type = STREAM_TYPE_VIDEO_MPEG2;
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break;
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case AV_CODEC_ID_H264:
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stream_type = STREAM_TYPE_VIDEO_H264;
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break;
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case AV_CODEC_ID_VC1:
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stream_type = STREAM_TYPE_VIDEO_VC1;
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break;
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case AV_CODEC_ID_HEVC:
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stream_type = STREAM_TYPE_VIDEO_HEVC;
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break;
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case AV_CODEC_ID_PCM_BLURAY:
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stream_type = 0x80;
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break;
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case AV_CODEC_ID_AC3:
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stream_type = 0x81;
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break;
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case AV_CODEC_ID_DTS:
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stream_type = (st->codecpar->channels > 6) ? 0x85 : 0x82;
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break;
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case AV_CODEC_ID_TRUEHD:
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stream_type = 0x83;
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break;
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case AV_CODEC_ID_EAC3:
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stream_type = 0x84;
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break;
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case AV_CODEC_ID_HDMV_PGS_SUBTITLE:
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stream_type = 0x90;
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break;
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case AV_CODEC_ID_HDMV_TEXT_SUBTITLE:
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stream_type = 0x92;
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break;
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default:
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av_log_once(s, AV_LOG_WARNING, AV_LOG_DEBUG, &ts_st->data_st_warning,
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"Stream %d, codec %s, is muxed as a private data stream "
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"and may not be recognized upon reading.\n", st->index,
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avcodec_get_name(st->codecpar->codec_id));
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stream_type = STREAM_TYPE_PRIVATE_DATA;
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break;
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}
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return stream_type;
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}
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static int mpegts_write_pmt(AVFormatContext *s, MpegTSService *service)
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{
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MpegTSWrite *ts = s->priv_data;
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uint8_t data[SECTION_LENGTH], *q, *desc_length_ptr, *program_info_length_ptr;
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int val, stream_type, i, err = 0;
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q = data;
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put16(&q, 0xe000 | service->pcr_pid);
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program_info_length_ptr = q;
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q += 2; /* patched after */
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/* put program info here */
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if (ts->m2ts_mode) {
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put_registration_descriptor(&q, MKTAG('H', 'D', 'M', 'V'));
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*q++ = 0x88; // descriptor_tag - hdmv_copy_control_descriptor
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*q++ = 0x04; // descriptor_length
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put16(&q, 0x0fff); // CA_System_ID
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*q++ = 0xfc; // private_data_byte
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*q++ = 0xfc; // private_data_byte
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}
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val = 0xf000 | (q - program_info_length_ptr - 2);
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program_info_length_ptr[0] = val >> 8;
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program_info_length_ptr[1] = val;
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for (i = 0; i < s->nb_streams; i++) {
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AVStream *st = s->streams[i];
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MpegTSWriteStream *ts_st = st->priv_data;
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AVDictionaryEntry *lang = av_dict_get(st->metadata, "language", NULL, 0);
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if (s->nb_programs) {
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int k, found = 0;
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AVProgram *program = service->program;
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for (k = 0; k < program->nb_stream_indexes; k++)
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if (program->stream_index[k] == i) {
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found = 1;
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break;
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}
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if (!found)
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continue;
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}
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|
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if (q - data > SECTION_LENGTH - 32) {
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err = 1;
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break;
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}
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stream_type = ts->m2ts_mode ? get_m2ts_stream_type(s, st) : get_dvb_stream_type(s, st);
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*q++ = stream_type;
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put16(&q, 0xe000 | ts_st->pid);
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desc_length_ptr = q;
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q += 2; /* patched after */
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|
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/* write optional descriptors here */
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switch (st->codecpar->codec_type) {
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case AVMEDIA_TYPE_AUDIO:
|
|
if (st->codecpar->codec_id==AV_CODEC_ID_AC3 && (ts->flags & MPEGTS_FLAG_SYSTEM_B)) {
|
|
*q++=0x6a; // AC3 descriptor see A038 DVB SI
|
|
*q++=1; // 1 byte, all flags sets to 0
|
|
*q++=0; // omit all fields...
|
|
}
|
|
if (st->codecpar->codec_id==AV_CODEC_ID_EAC3 && (ts->flags & MPEGTS_FLAG_SYSTEM_B)) {
|
|
*q++=0x7a; // EAC3 descriptor see A038 DVB SI
|
|
*q++=1; // 1 byte, all flags sets to 0
|
|
*q++=0; // omit all fields...
|
|
}
|
|
if (st->codecpar->codec_id==AV_CODEC_ID_S302M)
|
|
put_registration_descriptor(&q, MKTAG('B', 'S', 'S', 'D'));
|
|
if (st->codecpar->codec_id==AV_CODEC_ID_OPUS) {
|
|
/* 6 bytes registration descriptor, 4 bytes Opus audio descriptor */
|
|
if (q - data > SECTION_LENGTH - 6 - 4) {
|
|
err = 1;
|
|
break;
|
|
}
|
|
|
|
put_registration_descriptor(&q, MKTAG('O', 'p', 'u', 's'));
|
|
|
|
*q++ = 0x7f; /* DVB extension descriptor */
|
|
*q++ = 2;
|
|
*q++ = 0x80;
|
|
|
|
if (st->codecpar->extradata && st->codecpar->extradata_size >= 19) {
|
|
if (st->codecpar->extradata[18] == 0 && st->codecpar->channels <= 2) {
|
|
/* RTP mapping family */
|
|
*q++ = st->codecpar->channels;
|
|
} else if (st->codecpar->extradata[18] == 1 && st->codecpar->channels <= 8 &&
|
|
st->codecpar->extradata_size >= 21 + st->codecpar->channels) {
|
|
static const uint8_t coupled_stream_counts[9] = {
|
|
1, 0, 1, 1, 2, 2, 2, 3, 3
|
|
};
|
|
static const uint8_t channel_map_a[8][8] = {
|
|
{0},
|
|
{0, 1},
|
|
{0, 2, 1},
|
|
{0, 1, 2, 3},
|
|
{0, 4, 1, 2, 3},
|
|
{0, 4, 1, 2, 3, 5},
|
|
{0, 4, 1, 2, 3, 5, 6},
|
|
{0, 6, 1, 2, 3, 4, 5, 7},
|
|
};
|
|
static const uint8_t channel_map_b[8][8] = {
|
|
{0},
|
|
{0, 1},
|
|
{0, 1, 2},
|
|
{0, 1, 2, 3},
|
|
{0, 1, 2, 3, 4},
|
|
{0, 1, 2, 3, 4, 5},
|
|
{0, 1, 2, 3, 4, 5, 6},
|
|
{0, 1, 2, 3, 4, 5, 6, 7},
|
|
};
|
|
/* Vorbis mapping family */
|
|
|
|
if (st->codecpar->extradata[19] == st->codecpar->channels - coupled_stream_counts[st->codecpar->channels] &&
|
|
st->codecpar->extradata[20] == coupled_stream_counts[st->codecpar->channels] &&
|
|
memcmp(&st->codecpar->extradata[21], channel_map_a[st->codecpar->channels-1], st->codecpar->channels) == 0) {
|
|
*q++ = st->codecpar->channels;
|
|
} else if (st->codecpar->channels >= 2 && st->codecpar->extradata[19] == st->codecpar->channels &&
|
|
st->codecpar->extradata[20] == 0 &&
|
|
memcmp(&st->codecpar->extradata[21], channel_map_b[st->codecpar->channels-1], st->codecpar->channels) == 0) {
|
|
*q++ = st->codecpar->channels | 0x80;
|
|
} else {
|
|
/* Unsupported, could write an extended descriptor here */
|
|
av_log(s, AV_LOG_ERROR, "Unsupported Opus Vorbis-style channel mapping");
|
|
*q++ = 0xff;
|
|
}
|
|
} else {
|
|
/* Unsupported */
|
|
av_log(s, AV_LOG_ERROR, "Unsupported Opus channel mapping for family %d", st->codecpar->extradata[18]);
|
|
*q++ = 0xff;
|
|
}
|
|
} else if (st->codecpar->channels <= 2) {
|
|
/* Assume RTP mapping family */
|
|
*q++ = st->codecpar->channels;
|
|
} else {
|
|
/* Unsupported */
|
|
av_log(s, AV_LOG_ERROR, "Unsupported Opus channel mapping");
|
|
*q++ = 0xff;
|
|
}
|
|
}
|
|
|
|
if (lang) {
|
|
char *p;
|
|
char *next = lang->value;
|
|
uint8_t *len_ptr;
|
|
|
|
*q++ = 0x0a; /* ISO 639 language descriptor */
|
|
len_ptr = q++;
|
|
*len_ptr = 0;
|
|
|
|
for (p = lang->value; next && *len_ptr < 255 / 4 * 4; p = next + 1) {
|
|
if (q - data > SECTION_LENGTH - 4) {
|
|
err = 1;
|
|
break;
|
|
}
|
|
next = strchr(p, ',');
|
|
if (strlen(p) != 3 && (!next || next != p + 3))
|
|
continue; /* not a 3-letter code */
|
|
|
|
*q++ = *p++;
|
|
*q++ = *p++;
|
|
*q++ = *p++;
|
|
|
|
if (st->disposition & AV_DISPOSITION_CLEAN_EFFECTS)
|
|
*q++ = 0x01;
|
|
else if (st->disposition & AV_DISPOSITION_HEARING_IMPAIRED)
|
|
*q++ = 0x02;
|
|
else if (st->disposition & AV_DISPOSITION_VISUAL_IMPAIRED)
|
|
*q++ = 0x03;
|
|
else
|
|
*q++ = 0; /* undefined type */
|
|
|
|
*len_ptr += 4;
|
|
}
|
|
|
|
if (*len_ptr == 0)
|
|
q -= 2; /* no language codes were written */
|
|
}
|
|
break;
|
|
case AVMEDIA_TYPE_SUBTITLE:
|
|
{
|
|
const char default_language[] = "und";
|
|
const char *language = lang && strlen(lang->value) >= 3 ? lang->value : default_language;
|
|
|
|
if (st->codecpar->codec_id == AV_CODEC_ID_DVB_SUBTITLE) {
|
|
uint8_t *len_ptr;
|
|
int extradata_copied = 0;
|
|
|
|
*q++ = 0x59; /* subtitling_descriptor */
|
|
len_ptr = q++;
|
|
|
|
while (strlen(language) >= 3) {
|
|
if (sizeof(data) - (q - data) < 8) { /* 8 bytes per DVB subtitle substream data */
|
|
err = 1;
|
|
break;
|
|
}
|
|
*q++ = *language++;
|
|
*q++ = *language++;
|
|
*q++ = *language++;
|
|
/* Skip comma */
|
|
if (*language != '\0')
|
|
language++;
|
|
|
|
if (st->codecpar->extradata_size - extradata_copied >= 5) {
|
|
*q++ = st->codecpar->extradata[extradata_copied + 4]; /* subtitling_type */
|
|
memcpy(q, st->codecpar->extradata + extradata_copied, 4); /* composition_page_id and ancillary_page_id */
|
|
extradata_copied += 5;
|
|
q += 4;
|
|
} else {
|
|
/* subtitling_type:
|
|
* 0x10 - normal with no monitor aspect ratio criticality
|
|
* 0x20 - for the hard of hearing with no monitor aspect ratio criticality */
|
|
*q++ = (st->disposition & AV_DISPOSITION_HEARING_IMPAIRED) ? 0x20 : 0x10;
|
|
if ((st->codecpar->extradata_size == 4) && (extradata_copied == 0)) {
|
|
/* support of old 4-byte extradata format */
|
|
memcpy(q, st->codecpar->extradata, 4); /* composition_page_id and ancillary_page_id */
|
|
extradata_copied += 4;
|
|
q += 4;
|
|
} else {
|
|
put16(&q, 1); /* composition_page_id */
|
|
put16(&q, 1); /* ancillary_page_id */
|
|
}
|
|
}
|
|
}
|
|
|
|
*len_ptr = q - len_ptr - 1;
|
|
} else if (st->codecpar->codec_id == AV_CODEC_ID_DVB_TELETEXT) {
|
|
uint8_t *len_ptr = NULL;
|
|
int extradata_copied = 0;
|
|
|
|
/* The descriptor tag. teletext_descriptor */
|
|
*q++ = 0x56;
|
|
len_ptr = q++;
|
|
|
|
while (strlen(language) >= 3 && q - data < sizeof(data) - 6) {
|
|
*q++ = *language++;
|
|
*q++ = *language++;
|
|
*q++ = *language++;
|
|
/* Skip comma */
|
|
if (*language != '\0')
|
|
language++;
|
|
|
|
if (st->codecpar->extradata_size - 1 > extradata_copied) {
|
|
memcpy(q, st->codecpar->extradata + extradata_copied, 2);
|
|
extradata_copied += 2;
|
|
q += 2;
|
|
} else {
|
|
/* The Teletext descriptor:
|
|
* teletext_type: This 5-bit field indicates the type of Teletext page indicated. (0x01 Initial Teletext page)
|
|
* teletext_magazine_number: This is a 3-bit field which identifies the magazine number.
|
|
* teletext_page_number: This is an 8-bit field giving two 4-bit hex digits identifying the page number. */
|
|
*q++ = 0x08;
|
|
*q++ = 0x00;
|
|
}
|
|
}
|
|
|
|
*len_ptr = q - len_ptr - 1;
|
|
}
|
|
}
|
|
break;
|
|
case AVMEDIA_TYPE_VIDEO:
|
|
if (stream_type == STREAM_TYPE_VIDEO_DIRAC) {
|
|
put_registration_descriptor(&q, MKTAG('d', 'r', 'a', 'c'));
|
|
} else if (stream_type == STREAM_TYPE_VIDEO_VC1) {
|
|
put_registration_descriptor(&q, MKTAG('V', 'C', '-', '1'));
|
|
} else if (stream_type == STREAM_TYPE_VIDEO_HEVC && s->strict_std_compliance <= FF_COMPLIANCE_NORMAL) {
|
|
put_registration_descriptor(&q, MKTAG('H', 'E', 'V', 'C'));
|
|
}
|
|
break;
|
|
case AVMEDIA_TYPE_DATA:
|
|
if (st->codecpar->codec_id == AV_CODEC_ID_SMPTE_KLV) {
|
|
put_registration_descriptor(&q, MKTAG('K', 'L', 'V', 'A'));
|
|
} else if (st->codecpar->codec_id == AV_CODEC_ID_TIMED_ID3) {
|
|
const char *tag = "ID3 ";
|
|
*q++ = 0x26; /* metadata descriptor */
|
|
*q++ = 13;
|
|
put16(&q, 0xffff); /* metadata application format */
|
|
putbuf(&q, tag, strlen(tag));
|
|
*q++ = 0xff; /* metadata format */
|
|
putbuf(&q, tag, strlen(tag));
|
|
*q++ = 0; /* metadata service ID */
|
|
*q++ = 0xF; /* metadata_locator_record_flag|MPEG_carriage_flags|reserved */
|
|
}
|
|
break;
|
|
}
|
|
|
|
val = 0xf000 | (q - desc_length_ptr - 2);
|
|
desc_length_ptr[0] = val >> 8;
|
|
desc_length_ptr[1] = val;
|
|
}
|
|
|
|
if (err)
|
|
av_log(s, AV_LOG_ERROR,
|
|
"The PMT section cannot fit stream %d and all following streams.\n"
|
|
"Try reducing the number of languages in the audio streams "
|
|
"or the total number of streams.\n", i);
|
|
|
|
mpegts_write_section1(&service->pmt, PMT_TID, service->sid, ts->tables_version, 0, 0,
|
|
data, q - data);
|
|
return 0;
|
|
}
|
|
|
|
static void mpegts_write_sdt(AVFormatContext *s)
|
|
{
|
|
MpegTSWrite *ts = s->priv_data;
|
|
MpegTSService *service;
|
|
uint8_t data[SECTION_LENGTH], *q, *desc_list_len_ptr, *desc_len_ptr;
|
|
int i, running_status, free_ca_mode, val;
|
|
|
|
q = data;
|
|
put16(&q, ts->original_network_id);
|
|
*q++ = 0xff;
|
|
for (i = 0; i < ts->nb_services; i++) {
|
|
service = ts->services[i];
|
|
put16(&q, service->sid);
|
|
*q++ = 0xfc | 0x00; /* currently no EIT info */
|
|
desc_list_len_ptr = q;
|
|
q += 2;
|
|
running_status = 4; /* running */
|
|
free_ca_mode = 0;
|
|
|
|
/* write only one descriptor for the service name and provider */
|
|
*q++ = 0x48;
|
|
desc_len_ptr = q;
|
|
q++;
|
|
*q++ = ts->service_type;
|
|
putbuf(&q, service->provider_name, service->provider_name[0] + 1);
|
|
putbuf(&q, service->name, service->name[0] + 1);
|
|
desc_len_ptr[0] = q - desc_len_ptr - 1;
|
|
|
|
/* fill descriptor length */
|
|
val = (running_status << 13) | (free_ca_mode << 12) |
|
|
(q - desc_list_len_ptr - 2);
|
|
desc_list_len_ptr[0] = val >> 8;
|
|
desc_list_len_ptr[1] = val;
|
|
}
|
|
mpegts_write_section1(&ts->sdt, SDT_TID, ts->transport_stream_id, ts->tables_version, 0, 0,
|
|
data, q - data);
|
|
}
|
|
|
|
/* This stores a string in buf with the correct encoding and also sets the
|
|
* first byte as the length. !str is accepted for an empty string.
|
|
* If the string is already encoded, invalid UTF-8 or has no multibyte sequence
|
|
* then we keep it as is, otherwise we signal UTF-8 encoding. */
|
|
static int encode_str8(uint8_t *buf, const char *str)
|
|
{
|
|
size_t str_len;
|
|
if (!str)
|
|
str = "";
|
|
str_len = strlen(str);
|
|
if (str[0] && (unsigned)str[0] >= 0x20) { /* Make sure the string is not already encoded. */
|
|
const uint8_t *q = str;
|
|
int has_multibyte = 0;
|
|
while (*q) {
|
|
uint32_t code;
|
|
GET_UTF8(code, *q++, goto invalid;) /* Is it valid UTF-8? */
|
|
has_multibyte |= (code > 127); /* Does it have multibyte UTF-8 chars in it? */
|
|
}
|
|
if (has_multibyte) { /* If we have multibyte chars and valid UTF-8, then encode as such! */
|
|
if (str_len > 254)
|
|
return AVERROR(EINVAL);
|
|
buf[0] = str_len + 1;
|
|
buf[1] = 0x15;
|
|
memcpy(&buf[2], str, str_len);
|
|
return 0;
|
|
}
|
|
}
|
|
invalid:
|
|
/* Otherwise let's just encode the string as is! */
|
|
if (str_len > 255)
|
|
return AVERROR(EINVAL);
|
|
buf[0] = str_len;
|
|
memcpy(&buf[1], str, str_len);
|
|
return 0;
|
|
}
|
|
|
|
static int64_t get_pcr(const MpegTSWrite *ts, AVIOContext *pb)
|
|
{
|
|
return av_rescale(avio_tell(pb) + 11, 8 * PCR_TIME_BASE, ts->mux_rate) +
|
|
ts->first_pcr;
|
|
}
|
|
|
|
static void write_packet(AVFormatContext *s, const uint8_t *packet)
|
|
{
|
|
MpegTSWrite *ts = s->priv_data;
|
|
if (ts->m2ts_mode) {
|
|
int64_t pcr = get_pcr(s->priv_data, s->pb);
|
|
uint32_t tp_extra_header = pcr % 0x3fffffff;
|
|
tp_extra_header = AV_RB32(&tp_extra_header);
|
|
avio_write(s->pb, (unsigned char *) &tp_extra_header,
|
|
sizeof(tp_extra_header));
|
|
}
|
|
avio_write(s->pb, packet, TS_PACKET_SIZE);
|
|
}
|
|
|
|
static void section_write_packet(MpegTSSection *s, const uint8_t *packet)
|
|
{
|
|
AVFormatContext *ctx = s->opaque;
|
|
write_packet(ctx, packet);
|
|
}
|
|
|
|
static MpegTSService *mpegts_add_service(AVFormatContext *s, int sid,
|
|
const AVDictionary *metadata,
|
|
AVProgram *program)
|
|
{
|
|
MpegTSWrite *ts = s->priv_data;
|
|
MpegTSService *service;
|
|
AVDictionaryEntry *title, *provider;
|
|
char default_service_name[32];
|
|
const char *service_name;
|
|
const char *provider_name;
|
|
|
|
title = av_dict_get(metadata, "service_name", NULL, 0);
|
|
if (!title)
|
|
title = av_dict_get(metadata, "title", NULL, 0);
|
|
snprintf(default_service_name, sizeof(default_service_name), "%s%02d", DEFAULT_SERVICE_NAME, ts->nb_services + 1);
|
|
service_name = title ? title->value : default_service_name;
|
|
provider = av_dict_get(metadata, "service_provider", NULL, 0);
|
|
provider_name = provider ? provider->value : DEFAULT_PROVIDER_NAME;
|
|
|
|
service = av_mallocz(sizeof(MpegTSService));
|
|
if (!service)
|
|
return NULL;
|
|
service->pmt.pid = ts->pmt_start_pid + ts->nb_services;
|
|
service->sid = sid;
|
|
service->pcr_pid = 0x1fff;
|
|
if (encode_str8(service->provider_name, provider_name) < 0 ||
|
|
encode_str8(service->name, service_name) < 0) {
|
|
av_log(s, AV_LOG_ERROR, "Too long service or provider name\n");
|
|
goto fail;
|
|
}
|
|
if (av_dynarray_add_nofree(&ts->services, &ts->nb_services, service) < 0)
|
|
goto fail;
|
|
|
|
service->pmt.write_packet = section_write_packet;
|
|
service->pmt.opaque = s;
|
|
service->pmt.cc = 15;
|
|
service->pmt.discontinuity= ts->flags & MPEGTS_FLAG_DISCONT;
|
|
service->program = program;
|
|
|
|
return service;
|
|
fail:
|
|
av_free(service);
|
|
return NULL;
|
|
}
|
|
|
|
static void enable_pcr_generation_for_stream(AVFormatContext *s, AVStream *pcr_st)
|
|
{
|
|
MpegTSWrite *ts = s->priv_data;
|
|
MpegTSWriteStream *ts_st = pcr_st->priv_data;
|
|
|
|
if (ts->mux_rate > 1 || ts->pcr_period_ms >= 0) {
|
|
int pcr_period_ms = ts->pcr_period_ms == -1 ? PCR_RETRANS_TIME : ts->pcr_period_ms;
|
|
ts_st->pcr_period = av_rescale(pcr_period_ms, PCR_TIME_BASE, 1000);
|
|
} else {
|
|
/* By default, for VBR we select the highest multiple of frame duration which is less than 100 ms. */
|
|
int64_t frame_period = 0;
|
|
if (pcr_st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
|
|
int frame_size = av_get_audio_frame_duration2(pcr_st->codecpar, 0);
|
|
if (!frame_size) {
|
|
av_log(s, AV_LOG_WARNING, "frame size not set\n");
|
|
frame_size = 512;
|
|
}
|
|
frame_period = av_rescale_rnd(frame_size, PCR_TIME_BASE, pcr_st->codecpar->sample_rate, AV_ROUND_UP);
|
|
} else if (pcr_st->avg_frame_rate.num) {
|
|
frame_period = av_rescale_rnd(pcr_st->avg_frame_rate.den, PCR_TIME_BASE, pcr_st->avg_frame_rate.num, AV_ROUND_UP);
|
|
}
|
|
if (frame_period > 0 && frame_period <= PCR_TIME_BASE / 10)
|
|
ts_st->pcr_period = frame_period * (PCR_TIME_BASE / 10 / frame_period);
|
|
else
|
|
ts_st->pcr_period = 1;
|
|
}
|
|
|
|
// output a PCR as soon as possible
|
|
ts_st->last_pcr = ts->first_pcr - ts_st->pcr_period;
|
|
}
|
|
|
|
static void select_pcr_streams(AVFormatContext *s)
|
|
{
|
|
MpegTSWrite *ts = s->priv_data;
|
|
|
|
for (int i = 0; i < ts->nb_services; i++) {
|
|
MpegTSService *service = ts->services[i];
|
|
AVStream *pcr_st = NULL;
|
|
AVProgram *program = service->program;
|
|
int nb_streams = program ? program->nb_stream_indexes : s->nb_streams;
|
|
|
|
for (int j = 0; j < nb_streams; j++) {
|
|
AVStream *st = s->streams[program ? program->stream_index[j] : j];
|
|
if (!pcr_st ||
|
|
pcr_st->codecpar->codec_type != AVMEDIA_TYPE_VIDEO && st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
|
|
{
|
|
pcr_st = st;
|
|
}
|
|
}
|
|
|
|
if (pcr_st) {
|
|
MpegTSWriteStream *ts_st = pcr_st->priv_data;
|
|
service->pcr_pid = ts_st->pid;
|
|
enable_pcr_generation_for_stream(s, pcr_st);
|
|
av_log(s, AV_LOG_VERBOSE, "service %i using PCR in pid=%i, pcr_period=%"PRId64"ms\n",
|
|
service->sid, service->pcr_pid, av_rescale(ts_st->pcr_period, 1000, PCR_TIME_BASE));
|
|
}
|
|
}
|
|
}
|
|
|
|
static int mpegts_init(AVFormatContext *s)
|
|
{
|
|
MpegTSWrite *ts = s->priv_data;
|
|
int i, j;
|
|
int ret;
|
|
|
|
if (ts->m2ts_mode == -1) {
|
|
if (av_match_ext(s->url, "m2ts")) {
|
|
ts->m2ts_mode = 1;
|
|
} else {
|
|
ts->m2ts_mode = 0;
|
|
}
|
|
}
|
|
|
|
ts->m2ts_video_pid = M2TS_VIDEO_PID;
|
|
ts->m2ts_audio_pid = M2TS_AUDIO_START_PID;
|
|
ts->m2ts_pgssub_pid = M2TS_PGSSUB_START_PID;
|
|
ts->m2ts_textsub_pid = M2TS_TEXTSUB_PID;
|
|
|
|
if (ts->m2ts_mode) {
|
|
ts->pmt_start_pid = M2TS_PMT_PID;
|
|
if (s->nb_programs > 1) {
|
|
av_log(s, AV_LOG_ERROR, "Only one program is allowed in m2ts mode!\n");
|
|
return AVERROR(EINVAL);
|
|
}
|
|
}
|
|
|
|
if (s->max_delay < 0) /* Not set by the caller */
|
|
s->max_delay = 0;
|
|
|
|
// round up to a whole number of TS packets
|
|
ts->pes_payload_size = (ts->pes_payload_size + 14 + 183) / 184 * 184 - 14;
|
|
|
|
if (!s->nb_programs) {
|
|
/* allocate a single DVB service */
|
|
if (!mpegts_add_service(s, ts->service_id, s->metadata, NULL))
|
|
return AVERROR(ENOMEM);
|
|
} else {
|
|
for (i = 0; i < s->nb_programs; i++) {
|
|
AVProgram *program = s->programs[i];
|
|
if (!mpegts_add_service(s, program->id, program->metadata, program))
|
|
return AVERROR(ENOMEM);
|
|
}
|
|
}
|
|
|
|
ts->pat.pid = PAT_PID;
|
|
/* Initialize at 15 so that it wraps and is equal to 0 for the
|
|
* first packet we write. */
|
|
ts->pat.cc = 15;
|
|
ts->pat.discontinuity= ts->flags & MPEGTS_FLAG_DISCONT;
|
|
ts->pat.write_packet = section_write_packet;
|
|
ts->pat.opaque = s;
|
|
|
|
ts->sdt.pid = SDT_PID;
|
|
ts->sdt.cc = 15;
|
|
ts->sdt.discontinuity= ts->flags & MPEGTS_FLAG_DISCONT;
|
|
ts->sdt.write_packet = section_write_packet;
|
|
ts->sdt.opaque = s;
|
|
|
|
/* assign pids to each stream */
|
|
for (i = 0; i < s->nb_streams; i++) {
|
|
AVStream *st = s->streams[i];
|
|
MpegTSWriteStream *ts_st;
|
|
|
|
ts_st = av_mallocz(sizeof(MpegTSWriteStream));
|
|
if (!ts_st) {
|
|
return AVERROR(ENOMEM);
|
|
}
|
|
st->priv_data = ts_st;
|
|
|
|
avpriv_set_pts_info(st, 33, 1, 90000);
|
|
|
|
ts_st->payload = av_mallocz(ts->pes_payload_size);
|
|
if (!ts_st->payload) {
|
|
return AVERROR(ENOMEM);
|
|
}
|
|
|
|
/* MPEG pid values < 16 are reserved. Applications which set st->id in
|
|
* this range are assigned a calculated pid. */
|
|
if (st->id < 16) {
|
|
if (ts->m2ts_mode) {
|
|
switch (st->codecpar->codec_type) {
|
|
case AVMEDIA_TYPE_VIDEO:
|
|
ts_st->pid = ts->m2ts_video_pid++;
|
|
break;
|
|
case AVMEDIA_TYPE_AUDIO:
|
|
ts_st->pid = ts->m2ts_audio_pid++;
|
|
break;
|
|
case AVMEDIA_TYPE_SUBTITLE:
|
|
switch (st->codecpar->codec_id) {
|
|
case AV_CODEC_ID_HDMV_PGS_SUBTITLE:
|
|
ts_st->pid = ts->m2ts_pgssub_pid++;
|
|
break;
|
|
case AV_CODEC_ID_HDMV_TEXT_SUBTITLE:
|
|
ts_st->pid = ts->m2ts_textsub_pid++;
|
|
break;
|
|
}
|
|
break;
|
|
}
|
|
if (ts->m2ts_video_pid > M2TS_VIDEO_PID + 1 ||
|
|
ts->m2ts_audio_pid > M2TS_AUDIO_START_PID + 32 ||
|
|
ts->m2ts_pgssub_pid > M2TS_PGSSUB_START_PID + 32 ||
|
|
ts->m2ts_textsub_pid > M2TS_TEXTSUB_PID + 1 ||
|
|
ts_st->pid < 16) {
|
|
av_log(s, AV_LOG_ERROR, "Cannot automatically assign PID for stream %d\n", st->index);
|
|
return AVERROR(EINVAL);
|
|
}
|
|
} else {
|
|
ts_st->pid = ts->start_pid + i;
|
|
}
|
|
} else {
|
|
ts_st->pid = st->id;
|
|
}
|
|
if (ts_st->pid >= 0x1FFF) {
|
|
av_log(s, AV_LOG_ERROR,
|
|
"Invalid stream id %d, must be less than 8191\n", st->id);
|
|
return AVERROR(EINVAL);
|
|
}
|
|
for (j = 0; j < ts->nb_services; j++) {
|
|
if (ts->services[j]->pmt.pid > LAST_OTHER_PID) {
|
|
av_log(s, AV_LOG_ERROR,
|
|
"Invalid PMT PID %d, must be less than %d\n", ts->services[j]->pmt.pid, LAST_OTHER_PID + 1);
|
|
return AVERROR(EINVAL);
|
|
}
|
|
if (ts_st->pid == ts->services[j]->pmt.pid) {
|
|
av_log(s, AV_LOG_ERROR, "PID %d cannot be both elementary and PMT PID\n", ts_st->pid);
|
|
return AVERROR(EINVAL);
|
|
}
|
|
}
|
|
for (j = 0; j < i; j++) {
|
|
MpegTSWriteStream *ts_st_prev = s->streams[j]->priv_data;
|
|
if (ts_st_prev->pid == ts_st->pid) {
|
|
av_log(s, AV_LOG_ERROR, "Duplicate stream id %d\n", ts_st->pid);
|
|
return AVERROR(EINVAL);
|
|
}
|
|
}
|
|
ts_st->payload_pts = AV_NOPTS_VALUE;
|
|
ts_st->payload_dts = AV_NOPTS_VALUE;
|
|
ts_st->first_pts_check = 1;
|
|
ts_st->cc = 15;
|
|
ts_st->discontinuity = ts->flags & MPEGTS_FLAG_DISCONT;
|
|
if (st->codecpar->codec_id == AV_CODEC_ID_AAC &&
|
|
st->codecpar->extradata_size > 0) {
|
|
AVStream *ast;
|
|
ts_st->amux = avformat_alloc_context();
|
|
if (!ts_st->amux) {
|
|
return AVERROR(ENOMEM);
|
|
}
|
|
ts_st->amux->oformat =
|
|
av_guess_format((ts->flags & MPEGTS_FLAG_AAC_LATM) ? "latm" : "adts",
|
|
NULL, NULL);
|
|
if (!ts_st->amux->oformat) {
|
|
return AVERROR(EINVAL);
|
|
}
|
|
if (!(ast = avformat_new_stream(ts_st->amux, NULL))) {
|
|
return AVERROR(ENOMEM);
|
|
}
|
|
ret = avcodec_parameters_copy(ast->codecpar, st->codecpar);
|
|
if (ret != 0)
|
|
return ret;
|
|
ast->time_base = st->time_base;
|
|
ret = avformat_write_header(ts_st->amux, NULL);
|
|
if (ret < 0)
|
|
return ret;
|
|
}
|
|
if (st->codecpar->codec_id == AV_CODEC_ID_OPUS) {
|
|
ts_st->opus_pending_trim_start = st->codecpar->initial_padding * 48000 / st->codecpar->sample_rate;
|
|
}
|
|
}
|
|
|
|
if (ts->copyts < 1)
|
|
ts->first_pcr = av_rescale(s->max_delay, PCR_TIME_BASE, AV_TIME_BASE);
|
|
|
|
select_pcr_streams(s);
|
|
|
|
ts->last_pat_ts = AV_NOPTS_VALUE;
|
|
ts->last_sdt_ts = AV_NOPTS_VALUE;
|
|
ts->pat_period = av_rescale(ts->pat_period_us, PCR_TIME_BASE, AV_TIME_BASE);
|
|
ts->sdt_period = av_rescale(ts->sdt_period_us, PCR_TIME_BASE, AV_TIME_BASE);
|
|
|
|
if (ts->mux_rate == 1)
|
|
av_log(s, AV_LOG_VERBOSE, "muxrate VBR, ");
|
|
else
|
|
av_log(s, AV_LOG_VERBOSE, "muxrate %d, ", ts->mux_rate);
|
|
av_log(s, AV_LOG_VERBOSE,
|
|
"sdt every %"PRId64" ms, pat/pmt every %"PRId64" ms\n",
|
|
av_rescale(ts->sdt_period, 1000, PCR_TIME_BASE),
|
|
av_rescale(ts->pat_period, 1000, PCR_TIME_BASE));
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* send SDT, PAT and PMT tables regularly */
|
|
static void retransmit_si_info(AVFormatContext *s, int force_pat, int force_sdt, int64_t pcr)
|
|
{
|
|
MpegTSWrite *ts = s->priv_data;
|
|
int i;
|
|
|
|
if ((pcr != AV_NOPTS_VALUE && ts->last_sdt_ts == AV_NOPTS_VALUE) ||
|
|
(pcr != AV_NOPTS_VALUE && pcr - ts->last_sdt_ts >= ts->sdt_period) ||
|
|
force_sdt
|
|
) {
|
|
if (pcr != AV_NOPTS_VALUE)
|
|
ts->last_sdt_ts = FFMAX(pcr, ts->last_sdt_ts);
|
|
mpegts_write_sdt(s);
|
|
}
|
|
if ((pcr != AV_NOPTS_VALUE && ts->last_pat_ts == AV_NOPTS_VALUE) ||
|
|
(pcr != AV_NOPTS_VALUE && pcr - ts->last_pat_ts >= ts->pat_period) ||
|
|
force_pat) {
|
|
if (pcr != AV_NOPTS_VALUE)
|
|
ts->last_pat_ts = FFMAX(pcr, ts->last_pat_ts);
|
|
mpegts_write_pat(s);
|
|
for (i = 0; i < ts->nb_services; i++)
|
|
mpegts_write_pmt(s, ts->services[i]);
|
|
}
|
|
}
|
|
|
|
static int write_pcr_bits(uint8_t *buf, int64_t pcr)
|
|
{
|
|
int64_t pcr_low = pcr % 300, pcr_high = pcr / 300;
|
|
|
|
*buf++ = pcr_high >> 25;
|
|
*buf++ = pcr_high >> 17;
|
|
*buf++ = pcr_high >> 9;
|
|
*buf++ = pcr_high >> 1;
|
|
*buf++ = pcr_high << 7 | pcr_low >> 8 | 0x7e;
|
|
*buf++ = pcr_low;
|
|
|
|
return 6;
|
|
}
|
|
|
|
/* Write a single null transport stream packet */
|
|
static void mpegts_insert_null_packet(AVFormatContext *s)
|
|
{
|
|
uint8_t *q;
|
|
uint8_t buf[TS_PACKET_SIZE];
|
|
|
|
q = buf;
|
|
*q++ = 0x47;
|
|
*q++ = 0x00 | 0x1f;
|
|
*q++ = 0xff;
|
|
*q++ = 0x10;
|
|
memset(q, 0x0FF, TS_PACKET_SIZE - (q - buf));
|
|
write_packet(s, buf);
|
|
}
|
|
|
|
/* Write a single transport stream packet with a PCR and no payload */
|
|
static void mpegts_insert_pcr_only(AVFormatContext *s, AVStream *st)
|
|
{
|
|
MpegTSWrite *ts = s->priv_data;
|
|
MpegTSWriteStream *ts_st = st->priv_data;
|
|
uint8_t *q;
|
|
uint8_t buf[TS_PACKET_SIZE];
|
|
|
|
q = buf;
|
|
*q++ = 0x47;
|
|
*q++ = ts_st->pid >> 8;
|
|
*q++ = ts_st->pid;
|
|
*q++ = 0x20 | ts_st->cc; /* Adaptation only */
|
|
/* Continuity Count field does not increment (see 13818-1 section 2.4.3.3) */
|
|
*q++ = TS_PACKET_SIZE - 5; /* Adaptation Field Length */
|
|
*q++ = 0x10; /* Adaptation flags: PCR present */
|
|
if (ts_st->discontinuity) {
|
|
q[-1] |= 0x80;
|
|
ts_st->discontinuity = 0;
|
|
}
|
|
|
|
/* PCR coded into 6 bytes */
|
|
q += write_pcr_bits(q, get_pcr(ts, s->pb));
|
|
|
|
/* stuffing bytes */
|
|
memset(q, 0xFF, TS_PACKET_SIZE - (q - buf));
|
|
write_packet(s, buf);
|
|
}
|
|
|
|
static void write_pts(uint8_t *q, int fourbits, int64_t pts)
|
|
{
|
|
int val;
|
|
|
|
val = fourbits << 4 | (((pts >> 30) & 0x07) << 1) | 1;
|
|
*q++ = val;
|
|
val = (((pts >> 15) & 0x7fff) << 1) | 1;
|
|
*q++ = val >> 8;
|
|
*q++ = val;
|
|
val = (((pts) & 0x7fff) << 1) | 1;
|
|
*q++ = val >> 8;
|
|
*q++ = val;
|
|
}
|
|
|
|
/* Set an adaptation field flag in an MPEG-TS packet*/
|
|
static void set_af_flag(uint8_t *pkt, int flag)
|
|
{
|
|
// expect at least one flag to set
|
|
av_assert0(flag);
|
|
|
|
if ((pkt[3] & 0x20) == 0) {
|
|
// no AF yet, set adaptation field flag
|
|
pkt[3] |= 0x20;
|
|
// 1 byte length, no flags
|
|
pkt[4] = 1;
|
|
pkt[5] = 0;
|
|
}
|
|
pkt[5] |= flag;
|
|
}
|
|
|
|
/* Extend the adaptation field by size bytes */
|
|
static void extend_af(uint8_t *pkt, int size)
|
|
{
|
|
// expect already existing adaptation field
|
|
av_assert0(pkt[3] & 0x20);
|
|
pkt[4] += size;
|
|
}
|
|
|
|
/* Get a pointer to MPEG-TS payload (right after TS packet header) */
|
|
static uint8_t *get_ts_payload_start(uint8_t *pkt)
|
|
{
|
|
if (pkt[3] & 0x20)
|
|
return pkt + 5 + pkt[4];
|
|
else
|
|
return pkt + 4;
|
|
}
|
|
|
|
/* Add a PES header to the front of the payload, and segment into an integer
|
|
* number of TS packets. The final TS packet is padded using an oversized
|
|
* adaptation header to exactly fill the last TS packet.
|
|
* NOTE: 'payload' contains a complete PES payload. */
|
|
static void mpegts_write_pes(AVFormatContext *s, AVStream *st,
|
|
const uint8_t *payload, int payload_size,
|
|
int64_t pts, int64_t dts, int key, int stream_id)
|
|
{
|
|
MpegTSWriteStream *ts_st = st->priv_data;
|
|
MpegTSWrite *ts = s->priv_data;
|
|
uint8_t buf[TS_PACKET_SIZE];
|
|
uint8_t *q;
|
|
int val, is_start, len, header_len, write_pcr, is_dvb_subtitle, is_dvb_teletext, flags;
|
|
int afc_len, stuffing_len;
|
|
int64_t delay = av_rescale(s->max_delay, 90000, AV_TIME_BASE);
|
|
int force_pat = st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO && key && !ts_st->prev_payload_key;
|
|
int force_sdt = 0;
|
|
|
|
av_assert0(ts_st->payload != buf || st->codecpar->codec_type != AVMEDIA_TYPE_VIDEO);
|
|
if (ts->flags & MPEGTS_FLAG_PAT_PMT_AT_FRAMES && st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
|
|
force_pat = 1;
|
|
}
|
|
|
|
if (ts->flags & MPEGTS_FLAG_REEMIT_PAT_PMT) {
|
|
force_pat = 1;
|
|
force_sdt = 1;
|
|
ts->flags &= ~MPEGTS_FLAG_REEMIT_PAT_PMT;
|
|
}
|
|
|
|
is_start = 1;
|
|
while (payload_size > 0) {
|
|
int64_t pcr = AV_NOPTS_VALUE;
|
|
if (ts->mux_rate > 1)
|
|
pcr = get_pcr(ts, s->pb);
|
|
else if (dts != AV_NOPTS_VALUE)
|
|
pcr = (dts - delay) * 300;
|
|
|
|
retransmit_si_info(s, force_pat, force_sdt, pcr);
|
|
force_pat = 0;
|
|
force_sdt = 0;
|
|
|
|
write_pcr = 0;
|
|
if (ts->mux_rate > 1) {
|
|
/* Send PCR packets for all PCR streams if needed */
|
|
pcr = get_pcr(ts, s->pb);
|
|
if (pcr >= ts->next_pcr) {
|
|
int64_t next_pcr = INT64_MAX;
|
|
for (int i = 0; i < s->nb_streams; i++) {
|
|
/* Make the current stream the last, because for that we
|
|
* can insert the pcr into the payload later */
|
|
int st2_index = i < st->index ? i : (i + 1 == s->nb_streams ? st->index : i + 1);
|
|
AVStream *st2 = s->streams[st2_index];
|
|
MpegTSWriteStream *ts_st2 = st2->priv_data;
|
|
if (ts_st2->pcr_period) {
|
|
if (pcr - ts_st2->last_pcr >= ts_st2->pcr_period) {
|
|
ts_st2->last_pcr = FFMAX(pcr - ts_st2->pcr_period, ts_st2->last_pcr + ts_st2->pcr_period);
|
|
if (st2 != st) {
|
|
mpegts_insert_pcr_only(s, st2);
|
|
pcr = get_pcr(ts, s->pb);
|
|
} else {
|
|
write_pcr = 1;
|
|
}
|
|
}
|
|
next_pcr = FFMIN(next_pcr, ts_st2->last_pcr + ts_st2->pcr_period);
|
|
}
|
|
}
|
|
ts->next_pcr = next_pcr;
|
|
}
|
|
if (dts != AV_NOPTS_VALUE && (dts - pcr / 300) > delay) {
|
|
/* pcr insert gets priority over null packet insert */
|
|
if (write_pcr)
|
|
mpegts_insert_pcr_only(s, st);
|
|
else
|
|
mpegts_insert_null_packet(s);
|
|
/* recalculate write_pcr and possibly retransmit si_info */
|
|
continue;
|
|
}
|
|
} else if (ts_st->pcr_period && pcr != AV_NOPTS_VALUE) {
|
|
if (pcr - ts_st->last_pcr >= ts_st->pcr_period && is_start) {
|
|
ts_st->last_pcr = FFMAX(pcr - ts_st->pcr_period, ts_st->last_pcr + ts_st->pcr_period);
|
|
write_pcr = 1;
|
|
}
|
|
}
|
|
|
|
/* prepare packet header */
|
|
q = buf;
|
|
*q++ = 0x47;
|
|
val = ts_st->pid >> 8;
|
|
if (ts->m2ts_mode && st->codecpar->codec_id == AV_CODEC_ID_AC3)
|
|
val |= 0x20;
|
|
if (is_start)
|
|
val |= 0x40;
|
|
*q++ = val;
|
|
*q++ = ts_st->pid;
|
|
ts_st->cc = ts_st->cc + 1 & 0xf;
|
|
*q++ = 0x10 | ts_st->cc; // payload indicator + CC
|
|
if (ts_st->discontinuity) {
|
|
set_af_flag(buf, 0x80);
|
|
q = get_ts_payload_start(buf);
|
|
ts_st->discontinuity = 0;
|
|
}
|
|
if (key && is_start && pts != AV_NOPTS_VALUE) {
|
|
// set Random Access for key frames
|
|
if (ts_st->pcr_period)
|
|
write_pcr = 1;
|
|
set_af_flag(buf, 0x40);
|
|
q = get_ts_payload_start(buf);
|
|
}
|
|
if (write_pcr) {
|
|
set_af_flag(buf, 0x10);
|
|
q = get_ts_payload_start(buf);
|
|
// add 11, pcr references the last byte of program clock reference base
|
|
if (dts != AV_NOPTS_VALUE && dts < pcr / 300)
|
|
av_log(s, AV_LOG_WARNING, "dts < pcr, TS is invalid\n");
|
|
extend_af(buf, write_pcr_bits(q, pcr));
|
|
q = get_ts_payload_start(buf);
|
|
}
|
|
if (is_start) {
|
|
int pes_extension = 0;
|
|
int pes_header_stuffing_bytes = 0;
|
|
/* write PES header */
|
|
*q++ = 0x00;
|
|
*q++ = 0x00;
|
|
*q++ = 0x01;
|
|
is_dvb_subtitle = 0;
|
|
is_dvb_teletext = 0;
|
|
if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
|
|
if (st->codecpar->codec_id == AV_CODEC_ID_DIRAC)
|
|
*q++ = STREAM_ID_EXTENDED_STREAM_ID;
|
|
else
|
|
*q++ = STREAM_ID_VIDEO_STREAM_0;
|
|
} else if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO &&
|
|
(st->codecpar->codec_id == AV_CODEC_ID_MP2 ||
|
|
st->codecpar->codec_id == AV_CODEC_ID_MP3 ||
|
|
st->codecpar->codec_id == AV_CODEC_ID_AAC)) {
|
|
*q++ = STREAM_ID_AUDIO_STREAM_0;
|
|
} else if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO &&
|
|
st->codecpar->codec_id == AV_CODEC_ID_AC3 &&
|
|
ts->m2ts_mode) {
|
|
*q++ = STREAM_ID_EXTENDED_STREAM_ID;
|
|
} else if (st->codecpar->codec_type == AVMEDIA_TYPE_DATA &&
|
|
st->codecpar->codec_id == AV_CODEC_ID_TIMED_ID3) {
|
|
*q++ = STREAM_ID_PRIVATE_STREAM_1;
|
|
} else if (st->codecpar->codec_type == AVMEDIA_TYPE_DATA) {
|
|
*q++ = stream_id != -1 ? stream_id : STREAM_ID_METADATA_STREAM;
|
|
|
|
if (stream_id == STREAM_ID_PRIVATE_STREAM_1) /* asynchronous KLV */
|
|
pts = dts = AV_NOPTS_VALUE;
|
|
} else {
|
|
*q++ = STREAM_ID_PRIVATE_STREAM_1;
|
|
if (st->codecpar->codec_type == AVMEDIA_TYPE_SUBTITLE) {
|
|
if (st->codecpar->codec_id == AV_CODEC_ID_DVB_SUBTITLE) {
|
|
is_dvb_subtitle = 1;
|
|
} else if (st->codecpar->codec_id == AV_CODEC_ID_DVB_TELETEXT) {
|
|
is_dvb_teletext = 1;
|
|
}
|
|
}
|
|
}
|
|
header_len = 0;
|
|
flags = 0;
|
|
if (pts != AV_NOPTS_VALUE) {
|
|
header_len += 5;
|
|
flags |= 0x80;
|
|
}
|
|
if (dts != AV_NOPTS_VALUE && pts != AV_NOPTS_VALUE && dts != pts) {
|
|
header_len += 5;
|
|
flags |= 0x40;
|
|
}
|
|
if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO &&
|
|
st->codecpar->codec_id == AV_CODEC_ID_DIRAC) {
|
|
/* set PES_extension_flag */
|
|
pes_extension = 1;
|
|
flags |= 0x01;
|
|
|
|
/* One byte for PES2 extension flag +
|
|
* one byte for extension length +
|
|
* one byte for extension id */
|
|
header_len += 3;
|
|
}
|
|
/* for Blu-ray AC3 Audio the PES Extension flag should be as follow
|
|
* otherwise it will not play sound on blu-ray
|
|
*/
|
|
if (ts->m2ts_mode &&
|
|
st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO &&
|
|
st->codecpar->codec_id == AV_CODEC_ID_AC3) {
|
|
/* set PES_extension_flag */
|
|
pes_extension = 1;
|
|
flags |= 0x01;
|
|
header_len += 3;
|
|
}
|
|
if (is_dvb_teletext) {
|
|
pes_header_stuffing_bytes = 0x24 - header_len;
|
|
header_len = 0x24;
|
|
}
|
|
len = payload_size + header_len + 3;
|
|
/* 3 extra bytes should be added to DVB subtitle payload: 0x20 0x00 at the beginning and trailing 0xff */
|
|
if (is_dvb_subtitle) {
|
|
len += 3;
|
|
payload_size++;
|
|
}
|
|
if (len > 0xffff)
|
|
len = 0;
|
|
if (ts->omit_video_pes_length && st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
|
|
len = 0;
|
|
}
|
|
*q++ = len >> 8;
|
|
*q++ = len;
|
|
val = 0x80;
|
|
/* data alignment indicator is required for subtitle and data streams */
|
|
if (st->codecpar->codec_type == AVMEDIA_TYPE_SUBTITLE || st->codecpar->codec_type == AVMEDIA_TYPE_DATA)
|
|
val |= 0x04;
|
|
*q++ = val;
|
|
*q++ = flags;
|
|
*q++ = header_len;
|
|
if (pts != AV_NOPTS_VALUE) {
|
|
write_pts(q, flags >> 6, pts);
|
|
q += 5;
|
|
}
|
|
if (dts != AV_NOPTS_VALUE && pts != AV_NOPTS_VALUE && dts != pts) {
|
|
write_pts(q, 1, dts);
|
|
q += 5;
|
|
}
|
|
if (pes_extension && st->codecpar->codec_id == AV_CODEC_ID_DIRAC) {
|
|
flags = 0x01; /* set PES_extension_flag_2 */
|
|
*q++ = flags;
|
|
*q++ = 0x80 | 0x01; /* marker bit + extension length */
|
|
/* Set the stream ID extension flag bit to 0 and
|
|
* write the extended stream ID. */
|
|
*q++ = 0x00 | 0x60;
|
|
}
|
|
/* For Blu-ray AC3 Audio Setting extended flags */
|
|
if (ts->m2ts_mode &&
|
|
pes_extension &&
|
|
st->codecpar->codec_id == AV_CODEC_ID_AC3) {
|
|
flags = 0x01; /* set PES_extension_flag_2 */
|
|
*q++ = flags;
|
|
*q++ = 0x80 | 0x01; /* marker bit + extension length */
|
|
*q++ = 0x00 | 0x71; /* for AC3 Audio (specifically on blue-rays) */
|
|
}
|
|
|
|
|
|
if (is_dvb_subtitle) {
|
|
/* First two fields of DVB subtitles PES data:
|
|
* data_identifier: for DVB subtitle streams shall be coded with the value 0x20
|
|
* subtitle_stream_id: for DVB subtitle stream shall be identified by the value 0x00 */
|
|
*q++ = 0x20;
|
|
*q++ = 0x00;
|
|
}
|
|
if (is_dvb_teletext) {
|
|
memset(q, 0xff, pes_header_stuffing_bytes);
|
|
q += pes_header_stuffing_bytes;
|
|
}
|
|
is_start = 0;
|
|
}
|
|
/* header size */
|
|
header_len = q - buf;
|
|
/* data len */
|
|
len = TS_PACKET_SIZE - header_len;
|
|
if (len > payload_size)
|
|
len = payload_size;
|
|
stuffing_len = TS_PACKET_SIZE - header_len - len;
|
|
if (stuffing_len > 0) {
|
|
/* add stuffing with AFC */
|
|
if (buf[3] & 0x20) {
|
|
/* stuffing already present: increase its size */
|
|
afc_len = buf[4] + 1;
|
|
memmove(buf + 4 + afc_len + stuffing_len,
|
|
buf + 4 + afc_len,
|
|
header_len - (4 + afc_len));
|
|
buf[4] += stuffing_len;
|
|
memset(buf + 4 + afc_len, 0xff, stuffing_len);
|
|
} else {
|
|
/* add stuffing */
|
|
memmove(buf + 4 + stuffing_len, buf + 4, header_len - 4);
|
|
buf[3] |= 0x20;
|
|
buf[4] = stuffing_len - 1;
|
|
if (stuffing_len >= 2) {
|
|
buf[5] = 0x00;
|
|
memset(buf + 6, 0xff, stuffing_len - 2);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (is_dvb_subtitle && payload_size == len) {
|
|
memcpy(buf + TS_PACKET_SIZE - len, payload, len - 1);
|
|
buf[TS_PACKET_SIZE - 1] = 0xff; /* end_of_PES_data_field_marker: an 8-bit field with fixed contents 0xff for DVB subtitle */
|
|
} else {
|
|
memcpy(buf + TS_PACKET_SIZE - len, payload, len);
|
|
}
|
|
|
|
payload += len;
|
|
payload_size -= len;
|
|
write_packet(s, buf);
|
|
}
|
|
ts_st->prev_payload_key = key;
|
|
}
|
|
|
|
int ff_check_h264_startcode(AVFormatContext *s, const AVStream *st, const AVPacket *pkt)
|
|
{
|
|
if (pkt->size < 5 || AV_RB32(pkt->data) != 0x0000001 && AV_RB24(pkt->data) != 0x000001) {
|
|
if (!st->nb_frames) {
|
|
av_log(s, AV_LOG_ERROR, "H.264 bitstream malformed, "
|
|
"no startcode found, use the video bitstream filter 'h264_mp4toannexb' to fix it "
|
|
"('-bsf:v h264_mp4toannexb' option with ffmpeg)\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
av_log(s, AV_LOG_WARNING, "H.264 bitstream error, startcode missing, size %d", pkt->size);
|
|
if (pkt->size)
|
|
av_log(s, AV_LOG_WARNING, " data %08"PRIX32, AV_RB32(pkt->data));
|
|
av_log(s, AV_LOG_WARNING, "\n");
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int check_hevc_startcode(AVFormatContext *s, const AVStream *st, const AVPacket *pkt)
|
|
{
|
|
if (pkt->size < 5 || AV_RB32(pkt->data) != 0x0000001 && AV_RB24(pkt->data) != 0x000001) {
|
|
if (!st->nb_frames) {
|
|
av_log(s, AV_LOG_ERROR, "HEVC bitstream malformed, no startcode found\n");
|
|
return AVERROR_PATCHWELCOME;
|
|
}
|
|
av_log(s, AV_LOG_WARNING, "HEVC bitstream error, startcode missing, size %d", pkt->size);
|
|
if (pkt->size)
|
|
av_log(s, AV_LOG_WARNING, " data %08"PRIX32, AV_RB32(pkt->data));
|
|
av_log(s, AV_LOG_WARNING, "\n");
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/* Based on GStreamer's gst-plugins-base/ext/ogg/gstoggstream.c
|
|
* Released under the LGPL v2.1+, written by
|
|
* Vincent Penquerc'h <vincent.penquerch@collabora.co.uk>
|
|
*/
|
|
static int opus_get_packet_samples(AVFormatContext *s, AVPacket *pkt)
|
|
{
|
|
static const int durations[32] = {
|
|
480, 960, 1920, 2880, /* Silk NB */
|
|
480, 960, 1920, 2880, /* Silk MB */
|
|
480, 960, 1920, 2880, /* Silk WB */
|
|
480, 960, /* Hybrid SWB */
|
|
480, 960, /* Hybrid FB */
|
|
120, 240, 480, 960, /* CELT NB */
|
|
120, 240, 480, 960, /* CELT NB */
|
|
120, 240, 480, 960, /* CELT NB */
|
|
120, 240, 480, 960, /* CELT NB */
|
|
};
|
|
int toc, frame_duration, nframes, duration;
|
|
|
|
if (pkt->size < 1)
|
|
return 0;
|
|
|
|
toc = pkt->data[0];
|
|
|
|
frame_duration = durations[toc >> 3];
|
|
switch (toc & 3) {
|
|
case 0:
|
|
nframes = 1;
|
|
break;
|
|
case 1:
|
|
nframes = 2;
|
|
break;
|
|
case 2:
|
|
nframes = 2;
|
|
break;
|
|
case 3:
|
|
if (pkt->size < 2)
|
|
return 0;
|
|
nframes = pkt->data[1] & 63;
|
|
break;
|
|
}
|
|
|
|
duration = nframes * frame_duration;
|
|
if (duration > 5760) {
|
|
av_log(s, AV_LOG_WARNING,
|
|
"Opus packet duration > 120 ms, invalid");
|
|
return 0;
|
|
}
|
|
|
|
return duration;
|
|
}
|
|
|
|
static int mpegts_write_packet_internal(AVFormatContext *s, AVPacket *pkt)
|
|
{
|
|
AVStream *st = s->streams[pkt->stream_index];
|
|
int size = pkt->size;
|
|
uint8_t *buf = pkt->data;
|
|
uint8_t *data = NULL;
|
|
MpegTSWrite *ts = s->priv_data;
|
|
MpegTSWriteStream *ts_st = st->priv_data;
|
|
const int64_t delay = av_rescale(s->max_delay, 90000, AV_TIME_BASE) * 2;
|
|
const int64_t max_audio_delay = av_rescale(s->max_delay, 90000, AV_TIME_BASE) / 2;
|
|
int64_t dts = pkt->dts, pts = pkt->pts;
|
|
int opus_samples = 0;
|
|
int side_data_size;
|
|
uint8_t *side_data = NULL;
|
|
int stream_id = -1;
|
|
|
|
side_data = av_packet_get_side_data(pkt,
|
|
AV_PKT_DATA_MPEGTS_STREAM_ID,
|
|
&side_data_size);
|
|
if (side_data)
|
|
stream_id = side_data[0];
|
|
|
|
if (ts->copyts < 1) {
|
|
if (pts != AV_NOPTS_VALUE)
|
|
pts += delay;
|
|
if (dts != AV_NOPTS_VALUE)
|
|
dts += delay;
|
|
}
|
|
|
|
if (ts_st->first_pts_check && pts == AV_NOPTS_VALUE) {
|
|
av_log(s, AV_LOG_ERROR, "first pts value must be set\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
ts_st->first_pts_check = 0;
|
|
|
|
if (st->codecpar->codec_id == AV_CODEC_ID_H264) {
|
|
const uint8_t *p = buf, *buf_end = p + size;
|
|
uint32_t state = -1;
|
|
int extradd = (pkt->flags & AV_PKT_FLAG_KEY) ? st->codecpar->extradata_size : 0;
|
|
int ret = ff_check_h264_startcode(s, st, pkt);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
if (extradd && AV_RB24(st->codecpar->extradata) > 1)
|
|
extradd = 0;
|
|
|
|
do {
|
|
p = avpriv_find_start_code(p, buf_end, &state);
|
|
av_log(s, AV_LOG_TRACE, "nal %"PRId32"\n", state & 0x1f);
|
|
if ((state & 0x1f) == 7)
|
|
extradd = 0;
|
|
} while (p < buf_end && (state & 0x1f) != 9 &&
|
|
(state & 0x1f) != 5 && (state & 0x1f) != 1);
|
|
|
|
if ((state & 0x1f) != 5)
|
|
extradd = 0;
|
|
if ((state & 0x1f) != 9) { // AUD NAL
|
|
data = av_malloc(pkt->size + 6 + extradd);
|
|
if (!data)
|
|
return AVERROR(ENOMEM);
|
|
memcpy(data + 6, st->codecpar->extradata, extradd);
|
|
memcpy(data + 6 + extradd, pkt->data, pkt->size);
|
|
AV_WB32(data, 0x00000001);
|
|
data[4] = 0x09;
|
|
data[5] = 0xf0; // any slice type (0xe) + rbsp stop one bit
|
|
buf = data;
|
|
size = pkt->size + 6 + extradd;
|
|
}
|
|
} else if (st->codecpar->codec_id == AV_CODEC_ID_AAC) {
|
|
if (pkt->size < 2) {
|
|
av_log(s, AV_LOG_ERROR, "AAC packet too short\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
if ((AV_RB16(pkt->data) & 0xfff0) != 0xfff0) {
|
|
int ret;
|
|
AVPacket pkt2;
|
|
|
|
if (!ts_st->amux) {
|
|
av_log(s, AV_LOG_ERROR, "AAC bitstream not in ADTS format "
|
|
"and extradata missing\n");
|
|
} else {
|
|
av_init_packet(&pkt2);
|
|
pkt2.data = pkt->data;
|
|
pkt2.size = pkt->size;
|
|
av_assert0(pkt->dts != AV_NOPTS_VALUE);
|
|
pkt2.dts = av_rescale_q(pkt->dts, st->time_base, ts_st->amux->streams[0]->time_base);
|
|
|
|
ret = avio_open_dyn_buf(&ts_st->amux->pb);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
ret = av_write_frame(ts_st->amux, &pkt2);
|
|
if (ret < 0) {
|
|
ffio_free_dyn_buf(&ts_st->amux->pb);
|
|
return ret;
|
|
}
|
|
size = avio_close_dyn_buf(ts_st->amux->pb, &data);
|
|
ts_st->amux->pb = NULL;
|
|
buf = data;
|
|
}
|
|
}
|
|
} else if (st->codecpar->codec_id == AV_CODEC_ID_HEVC) {
|
|
const uint8_t *p = buf, *buf_end = p + size;
|
|
uint32_t state = -1;
|
|
int extradd = (pkt->flags & AV_PKT_FLAG_KEY) ? st->codecpar->extradata_size : 0;
|
|
int ret = check_hevc_startcode(s, st, pkt);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
if (extradd && AV_RB24(st->codecpar->extradata) > 1)
|
|
extradd = 0;
|
|
|
|
do {
|
|
p = avpriv_find_start_code(p, buf_end, &state);
|
|
av_log(s, AV_LOG_TRACE, "nal %"PRId32"\n", (state & 0x7e)>>1);
|
|
if ((state & 0x7e) == 2*32)
|
|
extradd = 0;
|
|
} while (p < buf_end && (state & 0x7e) != 2*35 &&
|
|
(state & 0x7e) >= 2*32);
|
|
|
|
if ((state & 0x7e) < 2*16 || (state & 0x7e) >= 2*24)
|
|
extradd = 0;
|
|
if ((state & 0x7e) != 2*35) { // AUD NAL
|
|
data = av_malloc(pkt->size + 7 + extradd);
|
|
if (!data)
|
|
return AVERROR(ENOMEM);
|
|
memcpy(data + 7, st->codecpar->extradata, extradd);
|
|
memcpy(data + 7 + extradd, pkt->data, pkt->size);
|
|
AV_WB32(data, 0x00000001);
|
|
data[4] = 2*35;
|
|
data[5] = 1;
|
|
data[6] = 0x50; // any slice type (0x4) + rbsp stop one bit
|
|
buf = data;
|
|
size = pkt->size + 7 + extradd;
|
|
}
|
|
} else if (st->codecpar->codec_id == AV_CODEC_ID_OPUS) {
|
|
if (pkt->size < 2) {
|
|
av_log(s, AV_LOG_ERROR, "Opus packet too short\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
/* Add Opus control header */
|
|
if ((AV_RB16(pkt->data) >> 5) != 0x3ff) {
|
|
uint8_t *side_data;
|
|
int side_data_size;
|
|
int i, n;
|
|
int ctrl_header_size;
|
|
int trim_start = 0, trim_end = 0;
|
|
|
|
opus_samples = opus_get_packet_samples(s, pkt);
|
|
|
|
side_data = av_packet_get_side_data(pkt,
|
|
AV_PKT_DATA_SKIP_SAMPLES,
|
|
&side_data_size);
|
|
|
|
if (side_data && side_data_size >= 10) {
|
|
trim_end = AV_RL32(side_data + 4) * 48000 / st->codecpar->sample_rate;
|
|
}
|
|
|
|
ctrl_header_size = pkt->size + 2 + pkt->size / 255 + 1;
|
|
if (ts_st->opus_pending_trim_start)
|
|
ctrl_header_size += 2;
|
|
if (trim_end)
|
|
ctrl_header_size += 2;
|
|
|
|
data = av_malloc(ctrl_header_size);
|
|
if (!data)
|
|
return AVERROR(ENOMEM);
|
|
|
|
data[0] = 0x7f;
|
|
data[1] = 0xe0;
|
|
if (ts_st->opus_pending_trim_start)
|
|
data[1] |= 0x10;
|
|
if (trim_end)
|
|
data[1] |= 0x08;
|
|
|
|
n = pkt->size;
|
|
i = 2;
|
|
do {
|
|
data[i] = FFMIN(n, 255);
|
|
n -= 255;
|
|
i++;
|
|
} while (n >= 0);
|
|
|
|
av_assert0(2 + pkt->size / 255 + 1 == i);
|
|
|
|
if (ts_st->opus_pending_trim_start) {
|
|
trim_start = FFMIN(ts_st->opus_pending_trim_start, opus_samples);
|
|
AV_WB16(data + i, trim_start);
|
|
i += 2;
|
|
ts_st->opus_pending_trim_start -= trim_start;
|
|
}
|
|
if (trim_end) {
|
|
trim_end = FFMIN(trim_end, opus_samples - trim_start);
|
|
AV_WB16(data + i, trim_end);
|
|
i += 2;
|
|
}
|
|
|
|
memcpy(data + i, pkt->data, pkt->size);
|
|
buf = data;
|
|
size = ctrl_header_size;
|
|
} else {
|
|
/* TODO: Can we get TS formatted data here? If so we will
|
|
* need to count the samples of that too! */
|
|
av_log(s, AV_LOG_WARNING, "Got MPEG-TS formatted Opus data, unhandled");
|
|
}
|
|
}
|
|
|
|
if (ts_st->payload_size && (ts_st->payload_size + size > ts->pes_payload_size ||
|
|
(dts != AV_NOPTS_VALUE && ts_st->payload_dts != AV_NOPTS_VALUE &&
|
|
dts - ts_st->payload_dts >= max_audio_delay) ||
|
|
ts_st->opus_queued_samples + opus_samples >= 5760 /* 120ms */)) {
|
|
mpegts_write_pes(s, st, ts_st->payload, ts_st->payload_size,
|
|
ts_st->payload_pts, ts_st->payload_dts,
|
|
ts_st->payload_flags & AV_PKT_FLAG_KEY, stream_id);
|
|
ts_st->payload_size = 0;
|
|
ts_st->opus_queued_samples = 0;
|
|
}
|
|
|
|
if (st->codecpar->codec_type != AVMEDIA_TYPE_AUDIO || size > ts->pes_payload_size) {
|
|
av_assert0(!ts_st->payload_size);
|
|
// for video and subtitle, write a single pes packet
|
|
mpegts_write_pes(s, st, buf, size, pts, dts,
|
|
pkt->flags & AV_PKT_FLAG_KEY, stream_id);
|
|
ts_st->opus_queued_samples = 0;
|
|
av_free(data);
|
|
return 0;
|
|
}
|
|
|
|
if (!ts_st->payload_size) {
|
|
ts_st->payload_pts = pts;
|
|
ts_st->payload_dts = dts;
|
|
ts_st->payload_flags = pkt->flags;
|
|
}
|
|
|
|
memcpy(ts_st->payload + ts_st->payload_size, buf, size);
|
|
ts_st->payload_size += size;
|
|
ts_st->opus_queued_samples += opus_samples;
|
|
|
|
av_free(data);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void mpegts_write_flush(AVFormatContext *s)
|
|
{
|
|
MpegTSWrite *ts = s->priv_data;
|
|
int i;
|
|
|
|
/* flush current packets */
|
|
for (i = 0; i < s->nb_streams; i++) {
|
|
AVStream *st = s->streams[i];
|
|
MpegTSWriteStream *ts_st = st->priv_data;
|
|
if (ts_st->payload_size > 0) {
|
|
mpegts_write_pes(s, st, ts_st->payload, ts_st->payload_size,
|
|
ts_st->payload_pts, ts_st->payload_dts,
|
|
ts_st->payload_flags & AV_PKT_FLAG_KEY, -1);
|
|
ts_st->payload_size = 0;
|
|
ts_st->opus_queued_samples = 0;
|
|
}
|
|
}
|
|
|
|
if (ts->m2ts_mode) {
|
|
int packets = (avio_tell(s->pb) / (TS_PACKET_SIZE + 4)) % 32;
|
|
while (packets++ < 32)
|
|
mpegts_insert_null_packet(s);
|
|
}
|
|
}
|
|
|
|
static int mpegts_write_packet(AVFormatContext *s, AVPacket *pkt)
|
|
{
|
|
if (!pkt) {
|
|
mpegts_write_flush(s);
|
|
return 1;
|
|
} else {
|
|
return mpegts_write_packet_internal(s, pkt);
|
|
}
|
|
}
|
|
|
|
static int mpegts_write_end(AVFormatContext *s)
|
|
{
|
|
if (s->pb)
|
|
mpegts_write_flush(s);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void mpegts_deinit(AVFormatContext *s)
|
|
{
|
|
MpegTSWrite *ts = s->priv_data;
|
|
MpegTSService *service;
|
|
int i;
|
|
|
|
for (i = 0; i < s->nb_streams; i++) {
|
|
AVStream *st = s->streams[i];
|
|
MpegTSWriteStream *ts_st = st->priv_data;
|
|
if (ts_st) {
|
|
av_freep(&ts_st->payload);
|
|
if (ts_st->amux) {
|
|
avformat_free_context(ts_st->amux);
|
|
ts_st->amux = NULL;
|
|
}
|
|
}
|
|
}
|
|
|
|
for (i = 0; i < ts->nb_services; i++) {
|
|
service = ts->services[i];
|
|
av_freep(&service);
|
|
}
|
|
av_freep(&ts->services);
|
|
}
|
|
|
|
static int mpegts_check_bitstream(struct AVFormatContext *s, const AVPacket *pkt)
|
|
{
|
|
int ret = 1;
|
|
AVStream *st = s->streams[pkt->stream_index];
|
|
|
|
if (st->codecpar->codec_id == AV_CODEC_ID_H264) {
|
|
if (pkt->size >= 5 && AV_RB32(pkt->data) != 0x0000001 &&
|
|
(AV_RB24(pkt->data) != 0x000001 ||
|
|
(st->codecpar->extradata_size > 0 &&
|
|
st->codecpar->extradata[0] == 1)))
|
|
ret = ff_stream_add_bitstream_filter(st, "h264_mp4toannexb", NULL);
|
|
} else if (st->codecpar->codec_id == AV_CODEC_ID_HEVC) {
|
|
if (pkt->size >= 5 && AV_RB32(pkt->data) != 0x0000001 &&
|
|
(AV_RB24(pkt->data) != 0x000001 ||
|
|
(st->codecpar->extradata_size > 0 &&
|
|
st->codecpar->extradata[0] == 1)))
|
|
ret = ff_stream_add_bitstream_filter(st, "hevc_mp4toannexb", NULL);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
#define OFFSET(x) offsetof(MpegTSWrite, x)
|
|
#define ENC AV_OPT_FLAG_ENCODING_PARAM
|
|
static const AVOption options[] = {
|
|
{ "mpegts_transport_stream_id", "Set transport_stream_id field.",
|
|
OFFSET(transport_stream_id), AV_OPT_TYPE_INT, { .i64 = 0x0001 }, 0x0001, 0xffff, ENC },
|
|
{ "mpegts_original_network_id", "Set original_network_id field.",
|
|
OFFSET(original_network_id), AV_OPT_TYPE_INT, { .i64 = DVB_PRIVATE_NETWORK_START }, 0x0001, 0xffff, ENC },
|
|
{ "mpegts_service_id", "Set service_id field.",
|
|
OFFSET(service_id), AV_OPT_TYPE_INT, { .i64 = 0x0001 }, 0x0001, 0xffff, ENC },
|
|
{ "mpegts_service_type", "Set service_type field.",
|
|
OFFSET(service_type), AV_OPT_TYPE_INT, { .i64 = 0x01 }, 0x01, 0xff, ENC, "mpegts_service_type" },
|
|
{ "digital_tv", "Digital Television.",
|
|
0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_DIGITAL_TV }, 0x01, 0xff, ENC, "mpegts_service_type" },
|
|
{ "digital_radio", "Digital Radio.",
|
|
0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_DIGITAL_RADIO }, 0x01, 0xff, ENC, "mpegts_service_type" },
|
|
{ "teletext", "Teletext.",
|
|
0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_TELETEXT }, 0x01, 0xff, ENC, "mpegts_service_type" },
|
|
{ "advanced_codec_digital_radio", "Advanced Codec Digital Radio.",
|
|
0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_ADVANCED_CODEC_DIGITAL_RADIO }, 0x01, 0xff, ENC, "mpegts_service_type" },
|
|
{ "mpeg2_digital_hdtv", "MPEG2 Digital HDTV.",
|
|
0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_MPEG2_DIGITAL_HDTV }, 0x01, 0xff, ENC, "mpegts_service_type" },
|
|
{ "advanced_codec_digital_sdtv", "Advanced Codec Digital SDTV.",
|
|
0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_ADVANCED_CODEC_DIGITAL_SDTV }, 0x01, 0xff, ENC, "mpegts_service_type" },
|
|
{ "advanced_codec_digital_hdtv", "Advanced Codec Digital HDTV.",
|
|
0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_ADVANCED_CODEC_DIGITAL_HDTV }, 0x01, 0xff, ENC, "mpegts_service_type" },
|
|
{ "hevc_digital_hdtv", "HEVC Digital Television Service.",
|
|
0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_HEVC_DIGITAL_HDTV }, 0x01, 0xff, ENC, "mpegts_service_type" },
|
|
{ "mpegts_pmt_start_pid", "Set the first pid of the PMT.",
|
|
OFFSET(pmt_start_pid), AV_OPT_TYPE_INT, { .i64 = 0x1000 }, FIRST_OTHER_PID, LAST_OTHER_PID, ENC },
|
|
{ "mpegts_start_pid", "Set the first pid.",
|
|
OFFSET(start_pid), AV_OPT_TYPE_INT, { .i64 = 0x0100 }, FIRST_OTHER_PID, LAST_OTHER_PID, ENC },
|
|
{ "mpegts_m2ts_mode", "Enable m2ts mode.", OFFSET(m2ts_mode), AV_OPT_TYPE_BOOL, { .i64 = -1 }, -1, 1, ENC },
|
|
{ "muxrate", NULL, OFFSET(mux_rate), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, INT_MAX, ENC },
|
|
{ "pes_payload_size", "Minimum PES packet payload in bytes",
|
|
OFFSET(pes_payload_size), AV_OPT_TYPE_INT, { .i64 = DEFAULT_PES_PAYLOAD_SIZE }, 0, INT_MAX, ENC },
|
|
{ "mpegts_flags", "MPEG-TS muxing flags", OFFSET(flags), AV_OPT_TYPE_FLAGS, { .i64 = 0 }, 0, INT_MAX, ENC, "mpegts_flags" },
|
|
{ "resend_headers", "Reemit PAT/PMT before writing the next packet",
|
|
0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_FLAG_REEMIT_PAT_PMT }, 0, INT_MAX, ENC, "mpegts_flags" },
|
|
{ "latm", "Use LATM packetization for AAC",
|
|
0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_FLAG_AAC_LATM }, 0, INT_MAX, ENC, "mpegts_flags" },
|
|
{ "pat_pmt_at_frames", "Reemit PAT and PMT at each video frame",
|
|
0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_FLAG_PAT_PMT_AT_FRAMES}, 0, INT_MAX, ENC, "mpegts_flags" },
|
|
{ "system_b", "Conform to System B (DVB) instead of System A (ATSC)",
|
|
0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_FLAG_SYSTEM_B }, 0, INT_MAX, ENC, "mpegts_flags" },
|
|
{ "initial_discontinuity", "Mark initial packets as discontinuous",
|
|
0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_FLAG_DISCONT }, 0, INT_MAX, ENC, "mpegts_flags" },
|
|
{ "mpegts_copyts", "don't offset dts/pts", OFFSET(copyts), AV_OPT_TYPE_BOOL, { .i64 = -1 }, -1, 1, ENC },
|
|
{ "tables_version", "set PAT, PMT and SDT version", OFFSET(tables_version), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 31, ENC },
|
|
{ "omit_video_pes_length", "Omit the PES packet length for video packets",
|
|
OFFSET(omit_video_pes_length), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, ENC },
|
|
{ "pcr_period", "PCR retransmission time in milliseconds",
|
|
OFFSET(pcr_period_ms), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, ENC },
|
|
{ "pat_period", "PAT/PMT retransmission time limit in seconds",
|
|
OFFSET(pat_period_us), AV_OPT_TYPE_DURATION, { .i64 = PAT_RETRANS_TIME * 1000LL }, 0, INT64_MAX, ENC },
|
|
{ "sdt_period", "SDT retransmission time limit in seconds",
|
|
OFFSET(sdt_period_us), AV_OPT_TYPE_DURATION, { .i64 = SDT_RETRANS_TIME * 1000LL }, 0, INT64_MAX, ENC },
|
|
{ NULL },
|
|
};
|
|
|
|
static const AVClass mpegts_muxer_class = {
|
|
.class_name = "MPEGTS muxer",
|
|
.item_name = av_default_item_name,
|
|
.option = options,
|
|
.version = LIBAVUTIL_VERSION_INT,
|
|
};
|
|
|
|
AVOutputFormat ff_mpegts_muxer = {
|
|
.name = "mpegts",
|
|
.long_name = NULL_IF_CONFIG_SMALL("MPEG-TS (MPEG-2 Transport Stream)"),
|
|
.mime_type = "video/MP2T",
|
|
.extensions = "ts,m2t,m2ts,mts",
|
|
.priv_data_size = sizeof(MpegTSWrite),
|
|
.audio_codec = AV_CODEC_ID_MP2,
|
|
.video_codec = AV_CODEC_ID_MPEG2VIDEO,
|
|
.init = mpegts_init,
|
|
.write_packet = mpegts_write_packet,
|
|
.write_trailer = mpegts_write_end,
|
|
.deinit = mpegts_deinit,
|
|
.check_bitstream = mpegts_check_bitstream,
|
|
.flags = AVFMT_ALLOW_FLUSH | AVFMT_VARIABLE_FPS | AVFMT_NODIMENSIONS,
|
|
.priv_class = &mpegts_muxer_class,
|
|
};
|