2 * MPEG-2 transport stream (aka DVB) muxer
3 * Copyright (c) 2003 Fabrice Bellard
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 #include "libavutil/avassert.h"
23 #include "libavutil/bswap.h"
24 #include "libavutil/crc.h"
25 #include "libavutil/dict.h"
26 #include "libavutil/intreadwrite.h"
27 #include "libavutil/mathematics.h"
28 #include "libavutil/opt.h"
30 #include "libavcodec/internal.h"
33 #include "avio_internal.h"
37 #define PCR_TIME_BASE 27000000
39 /* write DVB SI sections */
41 #define DVB_PRIVATE_NETWORK_START 0xff01
43 /*********************************************/
44 /* mpegts section writer */
46 typedef struct MpegTSSection {
50 void (*write_packet)(struct MpegTSSection *s, const uint8_t *packet);
54 typedef struct MpegTSService {
55 MpegTSSection pmt; /* MPEG-2 PMT table context */
56 int sid; /* service ID */
61 int pcr_packet_period;
65 // service_type values as defined in ETSI 300 468
67 MPEGTS_SERVICE_TYPE_DIGITAL_TV = 0x01,
68 MPEGTS_SERVICE_TYPE_DIGITAL_RADIO = 0x02,
69 MPEGTS_SERVICE_TYPE_TELETEXT = 0x03,
70 MPEGTS_SERVICE_TYPE_ADVANCED_CODEC_DIGITAL_RADIO = 0x0A,
71 MPEGTS_SERVICE_TYPE_MPEG2_DIGITAL_HDTV = 0x11,
72 MPEGTS_SERVICE_TYPE_ADVANCED_CODEC_DIGITAL_SDTV = 0x16,
73 MPEGTS_SERVICE_TYPE_ADVANCED_CODEC_DIGITAL_HDTV = 0x19,
74 MPEGTS_SERVICE_TYPE_HEVC_DIGITAL_HDTV = 0x1F,
76 typedef struct MpegTSWrite {
77 const AVClass *av_class;
78 MpegTSSection pat; /* MPEG-2 PAT table */
79 MpegTSSection sdt; /* MPEG-2 SDT table context */
80 MpegTSService **services;
82 int sdt_packet_period;
84 int pat_packet_period;
89 int mux_rate; ///< set to 1 when VBR
92 int transport_stream_id;
93 int original_network_id;
101 int reemit_pat_pmt; // backward compatibility
104 #define MPEGTS_FLAG_REEMIT_PAT_PMT 0x01
105 #define MPEGTS_FLAG_AAC_LATM 0x02
106 #define MPEGTS_FLAG_PAT_PMT_AT_FRAMES 0x04
107 #define MPEGTS_FLAG_SYSTEM_B 0x08
108 #define MPEGTS_FLAG_DISCONT 0x10
117 int omit_video_pes_length;
120 /* a PES packet header is generated every DEFAULT_PES_HEADER_FREQ packets */
121 #define DEFAULT_PES_HEADER_FREQ 16
122 #define DEFAULT_PES_PAYLOAD_SIZE ((DEFAULT_PES_HEADER_FREQ - 1) * 184 + 170)
124 /* The section length is 12 bits. The first 2 are set to 0, the remaining
125 * 10 bits should not exceed 1021. */
126 #define SECTION_LENGTH 1020
128 /* NOTE: 4 bytes must be left at the end for the crc32 */
129 static void mpegts_write_section(MpegTSSection *s, uint8_t *buf, int len)
132 unsigned char packet[TS_PACKET_SIZE];
133 const unsigned char *buf_ptr;
135 int first, b, len1, left;
137 crc = av_bswap32(av_crc(av_crc_get_table(AV_CRC_32_IEEE),
140 buf[len - 4] = (crc >> 24) & 0xff;
141 buf[len - 3] = (crc >> 16) & 0xff;
142 buf[len - 2] = (crc >> 8) & 0xff;
143 buf[len - 1] = crc & 0xff;
145 /* send each packet */
148 first = buf == buf_ptr;
156 s->cc = s->cc + 1 & 0xf;
158 if (s->discontinuity) {
162 s->discontinuity = 0;
165 *q++ = 0; /* 0 offset */
166 len1 = TS_PACKET_SIZE - (q - packet);
169 memcpy(q, buf_ptr, len1);
171 /* add known padding data */
172 left = TS_PACKET_SIZE - (q - packet);
174 memset(q, 0xff, left);
176 s->write_packet(s, packet);
183 static inline void put16(uint8_t **q_ptr, int val)
192 static int mpegts_write_section1(MpegTSSection *s, int tid, int id,
193 int version, int sec_num, int last_sec_num,
194 uint8_t *buf, int len)
196 uint8_t section[1024], *q;
197 unsigned int tot_len;
198 /* reserved_future_use field must be set to 1 for SDT */
199 unsigned int flags = tid == SDT_TID ? 0xf000 : 0xb000;
201 tot_len = 3 + 5 + len + 4;
202 /* check if not too big */
204 return AVERROR_INVALIDDATA;
208 put16(&q, flags | (len + 5 + 4)); /* 5 byte header + 4 byte CRC */
210 *q++ = 0xc1 | (version << 1); /* current_next_indicator = 1 */
215 mpegts_write_section(s, section, tot_len);
219 /*********************************************/
222 #define DEFAULT_PROVIDER_NAME "FFmpeg"
223 #define DEFAULT_SERVICE_NAME "Service01"
225 /* we retransmit the SI info at this rate */
226 #define SDT_RETRANS_TIME 500
227 #define PAT_RETRANS_TIME 100
228 #define PCR_RETRANS_TIME 20
230 typedef struct MpegTSWriteStream {
231 struct MpegTSService *service;
232 int pid; /* stream associated pid */
236 int first_pts_check; ///< first pts check needed
237 int prev_payload_key;
242 AVFormatContext *amux;
246 int opus_queued_samples;
247 int opus_pending_trim_start;
250 static void mpegts_write_pat(AVFormatContext *s)
252 MpegTSWrite *ts = s->priv_data;
253 MpegTSService *service;
254 uint8_t data[SECTION_LENGTH], *q;
258 for (i = 0; i < ts->nb_services; i++) {
259 service = ts->services[i];
260 put16(&q, service->sid);
261 put16(&q, 0xe000 | service->pmt.pid);
263 mpegts_write_section1(&ts->pat, PAT_TID, ts->tsid, ts->tables_version, 0, 0,
267 /* NOTE: !str is accepted for an empty string */
268 static void putstr8(uint8_t **q_ptr, const char *str, int write_len)
285 static int mpegts_write_pmt(AVFormatContext *s, MpegTSService *service)
287 MpegTSWrite *ts = s->priv_data;
288 uint8_t data[SECTION_LENGTH], *q, *desc_length_ptr, *program_info_length_ptr;
289 int val, stream_type, i, err = 0;
292 put16(&q, 0xe000 | service->pcr_pid);
294 program_info_length_ptr = q;
295 q += 2; /* patched after */
297 /* put program info here */
299 val = 0xf000 | (q - program_info_length_ptr - 2);
300 program_info_length_ptr[0] = val >> 8;
301 program_info_length_ptr[1] = val;
303 for (i = 0; i < s->nb_streams; i++) {
304 AVStream *st = s->streams[i];
305 MpegTSWriteStream *ts_st = st->priv_data;
306 AVDictionaryEntry *lang = av_dict_get(st->metadata, "language", NULL, 0);
308 if (s->nb_programs) {
310 AVProgram *program = service->program;
312 for (k = 0; k < program->nb_stream_indexes; k++)
313 if (program->stream_index[k] == i) {
322 if (q - data > SECTION_LENGTH - 32) {
326 switch (st->codecpar->codec_id) {
327 case AV_CODEC_ID_MPEG1VIDEO:
328 case AV_CODEC_ID_MPEG2VIDEO:
329 stream_type = STREAM_TYPE_VIDEO_MPEG2;
331 case AV_CODEC_ID_MPEG4:
332 stream_type = STREAM_TYPE_VIDEO_MPEG4;
334 case AV_CODEC_ID_H264:
335 stream_type = STREAM_TYPE_VIDEO_H264;
337 case AV_CODEC_ID_HEVC:
338 stream_type = STREAM_TYPE_VIDEO_HEVC;
340 case AV_CODEC_ID_CAVS:
341 stream_type = STREAM_TYPE_VIDEO_CAVS;
343 case AV_CODEC_ID_DIRAC:
344 stream_type = STREAM_TYPE_VIDEO_DIRAC;
346 case AV_CODEC_ID_VC1:
347 stream_type = STREAM_TYPE_VIDEO_VC1;
349 case AV_CODEC_ID_MP2:
350 case AV_CODEC_ID_MP3:
351 if ( st->codecpar->sample_rate > 0
352 && st->codecpar->sample_rate < 32000) {
353 stream_type = STREAM_TYPE_AUDIO_MPEG2;
355 stream_type = STREAM_TYPE_AUDIO_MPEG1;
358 case AV_CODEC_ID_AAC:
359 stream_type = (ts->flags & MPEGTS_FLAG_AAC_LATM)
360 ? STREAM_TYPE_AUDIO_AAC_LATM
361 : STREAM_TYPE_AUDIO_AAC;
363 case AV_CODEC_ID_AAC_LATM:
364 stream_type = STREAM_TYPE_AUDIO_AAC_LATM;
366 case AV_CODEC_ID_AC3:
367 stream_type = (ts->flags & MPEGTS_FLAG_SYSTEM_B)
368 ? STREAM_TYPE_PRIVATE_DATA
369 : STREAM_TYPE_AUDIO_AC3;
371 case AV_CODEC_ID_EAC3:
372 stream_type = (ts->flags & MPEGTS_FLAG_SYSTEM_B)
373 ? STREAM_TYPE_PRIVATE_DATA
374 : STREAM_TYPE_AUDIO_EAC3;
376 case AV_CODEC_ID_DTS:
377 stream_type = STREAM_TYPE_AUDIO_DTS;
379 case AV_CODEC_ID_TRUEHD:
380 stream_type = STREAM_TYPE_AUDIO_TRUEHD;
382 case AV_CODEC_ID_OPUS:
383 stream_type = STREAM_TYPE_PRIVATE_DATA;
385 case AV_CODEC_ID_TIMED_ID3:
386 stream_type = STREAM_TYPE_METADATA;
389 stream_type = STREAM_TYPE_PRIVATE_DATA;
394 put16(&q, 0xe000 | ts_st->pid);
396 q += 2; /* patched after */
398 /* write optional descriptors here */
399 switch (st->codecpar->codec_type) {
400 case AVMEDIA_TYPE_AUDIO:
401 if (st->codecpar->codec_id==AV_CODEC_ID_AC3 && (ts->flags & MPEGTS_FLAG_SYSTEM_B)) {
402 *q++=0x6a; // AC3 descriptor see A038 DVB SI
403 *q++=1; // 1 byte, all flags sets to 0
404 *q++=0; // omit all fields...
406 if (st->codecpar->codec_id==AV_CODEC_ID_EAC3 && (ts->flags & MPEGTS_FLAG_SYSTEM_B)) {
407 *q++=0x7a; // EAC3 descriptor see A038 DVB SI
408 *q++=1; // 1 byte, all flags sets to 0
409 *q++=0; // omit all fields...
411 if (st->codecpar->codec_id==AV_CODEC_ID_S302M) {
412 *q++ = 0x05; /* MPEG-2 registration descriptor*/
419 if (st->codecpar->codec_id==AV_CODEC_ID_OPUS) {
420 /* 6 bytes registration descriptor, 4 bytes Opus audio descriptor */
421 if (q - data > SECTION_LENGTH - 6 - 4) {
426 *q++ = 0x05; /* MPEG-2 registration descriptor*/
433 *q++ = 0x7f; /* DVB extension descriptor */
437 if (st->codecpar->extradata && st->codecpar->extradata_size >= 19) {
438 if (st->codecpar->extradata[18] == 0 && st->codecpar->channels <= 2) {
439 /* RTP mapping family */
440 *q++ = st->codecpar->channels;
441 } else if (st->codecpar->extradata[18] == 1 && st->codecpar->channels <= 8 &&
442 st->codecpar->extradata_size >= 21 + st->codecpar->channels) {
443 static const uint8_t coupled_stream_counts[9] = {
444 1, 0, 1, 1, 2, 2, 2, 3, 3
446 static const uint8_t channel_map_a[8][8] = {
453 {0, 4, 1, 2, 3, 5, 6},
454 {0, 6, 1, 2, 3, 4, 5, 7},
456 static const uint8_t channel_map_b[8][8] = {
463 {0, 1, 2, 3, 4, 5, 6},
464 {0, 1, 2, 3, 4, 5, 6, 7},
466 /* Vorbis mapping family */
468 if (st->codecpar->extradata[19] == st->codecpar->channels - coupled_stream_counts[st->codecpar->channels] &&
469 st->codecpar->extradata[20] == coupled_stream_counts[st->codecpar->channels] &&
470 memcmp(&st->codecpar->extradata[21], channel_map_a[st->codecpar->channels-1], st->codecpar->channels) == 0) {
471 *q++ = st->codecpar->channels;
472 } else if (st->codecpar->channels >= 2 && st->codecpar->extradata[19] == st->codecpar->channels &&
473 st->codecpar->extradata[20] == 0 &&
474 memcmp(&st->codecpar->extradata[21], channel_map_b[st->codecpar->channels-1], st->codecpar->channels) == 0) {
475 *q++ = st->codecpar->channels | 0x80;
477 /* Unsupported, could write an extended descriptor here */
478 av_log(s, AV_LOG_ERROR, "Unsupported Opus Vorbis-style channel mapping");
483 av_log(s, AV_LOG_ERROR, "Unsupported Opus channel mapping for family %d", st->codecpar->extradata[18]);
486 } else if (st->codecpar->channels <= 2) {
487 /* Assume RTP mapping family */
488 *q++ = st->codecpar->channels;
491 av_log(s, AV_LOG_ERROR, "Unsupported Opus channel mapping");
498 char *next = lang->value;
501 *q++ = 0x0a; /* ISO 639 language descriptor */
505 for (p = lang->value; next && *len_ptr < 255 / 4 * 4; p = next + 1) {
506 if (q - data > SECTION_LENGTH - 4) {
510 next = strchr(p, ',');
511 if (strlen(p) != 3 && (!next || next != p + 3))
512 continue; /* not a 3-letter code */
518 if (st->disposition & AV_DISPOSITION_CLEAN_EFFECTS)
520 else if (st->disposition & AV_DISPOSITION_HEARING_IMPAIRED)
522 else if (st->disposition & AV_DISPOSITION_VISUAL_IMPAIRED)
525 *q++ = 0; /* undefined type */
531 q -= 2; /* no language codes were written */
534 case AVMEDIA_TYPE_SUBTITLE:
536 const char default_language[] = "und";
537 const char *language = lang && strlen(lang->value) >= 3 ? lang->value : default_language;
539 if (st->codecpar->codec_id == AV_CODEC_ID_DVB_SUBTITLE) {
541 int extradata_copied = 0;
543 *q++ = 0x59; /* subtitling_descriptor */
546 while (strlen(language) >= 3) {
547 if (sizeof(data) - (q - data) < 8) { /* 8 bytes per DVB subtitle substream data */
555 if (*language != '\0')
558 if (st->codecpar->extradata_size - extradata_copied >= 5) {
559 *q++ = st->codecpar->extradata[extradata_copied + 4]; /* subtitling_type */
560 memcpy(q, st->codecpar->extradata + extradata_copied, 4); /* composition_page_id and ancillary_page_id */
561 extradata_copied += 5;
565 * 0x10 - normal with no monitor aspect ratio criticality
566 * 0x20 - for the hard of hearing with no monitor aspect ratio criticality */
567 *q++ = (st->disposition & AV_DISPOSITION_HEARING_IMPAIRED) ? 0x20 : 0x10;
568 if ((st->codecpar->extradata_size == 4) && (extradata_copied == 0)) {
569 /* support of old 4-byte extradata format */
570 memcpy(q, st->codecpar->extradata, 4); /* composition_page_id and ancillary_page_id */
571 extradata_copied += 4;
574 put16(&q, 1); /* composition_page_id */
575 put16(&q, 1); /* ancillary_page_id */
580 *len_ptr = q - len_ptr - 1;
581 } else if (st->codecpar->codec_id == AV_CODEC_ID_DVB_TELETEXT) {
582 uint8_t *len_ptr = NULL;
583 int extradata_copied = 0;
585 /* The descriptor tag. teletext_descriptor */
589 while (strlen(language) >= 3 && q - data < sizeof(data) - 6) {
594 if (*language != '\0')
597 if (st->codecpar->extradata_size - 1 > extradata_copied) {
598 memcpy(q, st->codecpar->extradata + extradata_copied, 2);
599 extradata_copied += 2;
602 /* The Teletext descriptor:
603 * teletext_type: This 5-bit field indicates the type of Teletext page indicated. (0x01 Initial Teletext page)
604 * teletext_magazine_number: This is a 3-bit field which identifies the magazine number.
605 * teletext_page_number: This is an 8-bit field giving two 4-bit hex digits identifying the page number. */
611 *len_ptr = q - len_ptr - 1;
615 case AVMEDIA_TYPE_VIDEO:
616 if (stream_type == STREAM_TYPE_VIDEO_DIRAC) {
617 *q++ = 0x05; /*MPEG-2 registration descriptor*/
623 } else if (stream_type == STREAM_TYPE_VIDEO_VC1) {
624 *q++ = 0x05; /*MPEG-2 registration descriptor*/
632 case AVMEDIA_TYPE_DATA:
633 if (st->codecpar->codec_id == AV_CODEC_ID_SMPTE_KLV) {
634 *q++ = 0x05; /* MPEG-2 registration descriptor */
640 } else if (st->codecpar->codec_id == AV_CODEC_ID_TIMED_ID3) {
641 const char *tag = "ID3 ";
642 *q++ = 0x26; /* metadata descriptor */
644 put16(&q, 0xffff); /* metadata application format */
646 *q++ = 0xff; /* metadata format */
648 *q++ = 0; /* metadata service ID */
649 *q++ = 0xF; /* metadata_locator_record_flag|MPEG_carriage_flags|reserved */
654 val = 0xf000 | (q - desc_length_ptr - 2);
655 desc_length_ptr[0] = val >> 8;
656 desc_length_ptr[1] = val;
660 av_log(s, AV_LOG_ERROR,
661 "The PMT section cannot fit stream %d and all following streams.\n"
662 "Try reducing the number of languages in the audio streams "
663 "or the total number of streams.\n", i);
665 mpegts_write_section1(&service->pmt, PMT_TID, service->sid, ts->tables_version, 0, 0,
670 static void mpegts_write_sdt(AVFormatContext *s)
672 MpegTSWrite *ts = s->priv_data;
673 MpegTSService *service;
674 uint8_t data[SECTION_LENGTH], *q, *desc_list_len_ptr, *desc_len_ptr;
675 int i, running_status, free_ca_mode, val;
680 for (i = 0; i < ts->nb_services; i++) {
681 service = ts->services[i];
682 put16(&q, service->sid);
683 *q++ = 0xfc | 0x00; /* currently no EIT info */
684 desc_list_len_ptr = q;
686 running_status = 4; /* running */
689 /* write only one descriptor for the service name and provider */
693 *q++ = ts->service_type;
694 putstr8(&q, service->provider_name, 1);
695 putstr8(&q, service->name, 1);
696 desc_len_ptr[0] = q - desc_len_ptr - 1;
698 /* fill descriptor length */
699 val = (running_status << 13) | (free_ca_mode << 12) |
700 (q - desc_list_len_ptr - 2);
701 desc_list_len_ptr[0] = val >> 8;
702 desc_list_len_ptr[1] = val;
704 mpegts_write_section1(&ts->sdt, SDT_TID, ts->tsid, ts->tables_version, 0, 0,
708 static MpegTSService *mpegts_add_service(MpegTSWrite *ts, int sid,
709 const char *provider_name,
712 MpegTSService *service;
714 service = av_mallocz(sizeof(MpegTSService));
717 service->pmt.pid = ts->pmt_start_pid + ts->nb_services;
719 service->pcr_pid = 0x1fff;
720 service->provider_name = av_strdup(provider_name);
721 service->name = av_strdup(name);
722 if (!service->provider_name || !service->name)
724 if (av_dynarray_add_nofree(&ts->services, &ts->nb_services, service) < 0)
729 av_freep(&service->provider_name);
730 av_freep(&service->name);
735 static int64_t get_pcr(const MpegTSWrite *ts, AVIOContext *pb)
737 return av_rescale(avio_tell(pb) + 11, 8 * PCR_TIME_BASE, ts->mux_rate) +
741 static void mpegts_prefix_m2ts_header(AVFormatContext *s)
743 MpegTSWrite *ts = s->priv_data;
745 int64_t pcr = get_pcr(s->priv_data, s->pb);
746 uint32_t tp_extra_header = pcr % 0x3fffffff;
747 tp_extra_header = AV_RB32(&tp_extra_header);
748 avio_write(s->pb, (unsigned char *) &tp_extra_header,
749 sizeof(tp_extra_header));
753 static void section_write_packet(MpegTSSection *s, const uint8_t *packet)
755 AVFormatContext *ctx = s->opaque;
756 mpegts_prefix_m2ts_header(ctx);
757 avio_write(ctx->pb, packet, TS_PACKET_SIZE);
760 static int mpegts_init(AVFormatContext *s)
762 MpegTSWrite *ts = s->priv_data;
763 MpegTSWriteStream *ts_st;
764 MpegTSService *service;
765 AVStream *st, *pcr_st = NULL;
766 AVDictionaryEntry *title, *provider;
768 const char *service_name;
769 const char *provider_name;
773 if (s->max_delay < 0) /* Not set by the caller */
776 // round up to a whole number of TS packets
777 ts->pes_payload_size = (ts->pes_payload_size + 14 + 183) / 184 * 184 - 14;
779 ts->tsid = ts->transport_stream_id;
780 ts->onid = ts->original_network_id;
781 if (!s->nb_programs) {
782 /* allocate a single DVB service */
783 title = av_dict_get(s->metadata, "service_name", NULL, 0);
785 title = av_dict_get(s->metadata, "title", NULL, 0);
786 service_name = title ? title->value : DEFAULT_SERVICE_NAME;
787 provider = av_dict_get(s->metadata, "service_provider", NULL, 0);
788 provider_name = provider ? provider->value : DEFAULT_PROVIDER_NAME;
789 service = mpegts_add_service(ts, ts->service_id,
790 provider_name, service_name);
793 return AVERROR(ENOMEM);
795 service->pmt.write_packet = section_write_packet;
796 service->pmt.opaque = s;
797 service->pmt.cc = 15;
798 service->pmt.discontinuity= ts->flags & MPEGTS_FLAG_DISCONT;
800 for (i = 0; i < s->nb_programs; i++) {
801 AVProgram *program = s->programs[i];
802 title = av_dict_get(program->metadata, "service_name", NULL, 0);
804 title = av_dict_get(program->metadata, "title", NULL, 0);
805 service_name = title ? title->value : DEFAULT_SERVICE_NAME;
806 provider = av_dict_get(program->metadata, "service_provider", NULL, 0);
807 provider_name = provider ? provider->value : DEFAULT_PROVIDER_NAME;
808 service = mpegts_add_service(ts, program->id,
809 provider_name, service_name);
812 return AVERROR(ENOMEM);
814 service->pmt.write_packet = section_write_packet;
815 service->pmt.opaque = s;
816 service->pmt.cc = 15;
817 service->pmt.discontinuity= ts->flags & MPEGTS_FLAG_DISCONT;
818 service->program = program;
822 ts->pat.pid = PAT_PID;
823 /* Initialize at 15 so that it wraps and is equal to 0 for the
824 * first packet we write. */
826 ts->pat.discontinuity= ts->flags & MPEGTS_FLAG_DISCONT;
827 ts->pat.write_packet = section_write_packet;
830 ts->sdt.pid = SDT_PID;
832 ts->sdt.discontinuity= ts->flags & MPEGTS_FLAG_DISCONT;
833 ts->sdt.write_packet = section_write_packet;
836 pids = av_malloc_array(s->nb_streams, sizeof(*pids));
838 ret = AVERROR(ENOMEM);
842 /* assign pids to each stream */
843 for (i = 0; i < s->nb_streams; i++) {
847 ts_st = av_mallocz(sizeof(MpegTSWriteStream));
849 ret = AVERROR(ENOMEM);
852 st->priv_data = ts_st;
854 ts_st->user_tb = st->time_base;
855 avpriv_set_pts_info(st, 33, 1, 90000);
857 ts_st->payload = av_mallocz(ts->pes_payload_size);
858 if (!ts_st->payload) {
859 ret = AVERROR(ENOMEM);
863 program = av_find_program_from_stream(s, NULL, i);
865 for (j = 0; j < ts->nb_services; j++) {
866 if (ts->services[j]->program == program) {
867 service = ts->services[j];
873 ts_st->service = service;
874 /* MPEG pid values < 16 are reserved. Applications which set st->id in
875 * this range are assigned a calculated pid. */
877 ts_st->pid = ts->start_pid + i;
878 } else if (st->id < 0x1FFF) {
881 av_log(s, AV_LOG_ERROR,
882 "Invalid stream id %d, must be less than 8191\n", st->id);
883 ret = AVERROR(EINVAL);
886 if (ts_st->pid == service->pmt.pid) {
887 av_log(s, AV_LOG_ERROR, "Duplicate stream id %d\n", ts_st->pid);
888 ret = AVERROR(EINVAL);
891 for (j = 0; j < i; j++) {
892 if (pids[j] == ts_st->pid) {
893 av_log(s, AV_LOG_ERROR, "Duplicate stream id %d\n", ts_st->pid);
894 ret = AVERROR(EINVAL);
898 pids[i] = ts_st->pid;
899 ts_st->payload_pts = AV_NOPTS_VALUE;
900 ts_st->payload_dts = AV_NOPTS_VALUE;
901 ts_st->first_pts_check = 1;
903 ts_st->discontinuity = ts->flags & MPEGTS_FLAG_DISCONT;
904 /* update PCR pid by using the first video stream */
905 if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO &&
906 service->pcr_pid == 0x1fff) {
907 service->pcr_pid = ts_st->pid;
910 if (st->codecpar->codec_id == AV_CODEC_ID_AAC &&
911 st->codecpar->extradata_size > 0) {
913 ts_st->amux = avformat_alloc_context();
915 ret = AVERROR(ENOMEM);
918 ts_st->amux->oformat =
919 av_guess_format((ts->flags & MPEGTS_FLAG_AAC_LATM) ? "latm" : "adts",
921 if (!ts_st->amux->oformat) {
922 ret = AVERROR(EINVAL);
925 if (!(ast = avformat_new_stream(ts_st->amux, NULL))) {
926 ret = AVERROR(ENOMEM);
929 ret = avcodec_parameters_copy(ast->codecpar, st->codecpar);
932 ast->time_base = st->time_base;
933 ret = avformat_write_header(ts_st->amux, NULL);
937 if (st->codecpar->codec_id == AV_CODEC_ID_OPUS) {
938 ts_st->opus_pending_trim_start = st->codecpar->initial_padding * 48000 / st->codecpar->sample_rate;
944 /* if no video stream, use the first stream as PCR */
945 if (service->pcr_pid == 0x1fff && s->nb_streams > 0) {
946 pcr_st = s->streams[0];
947 ts_st = pcr_st->priv_data;
948 service->pcr_pid = ts_st->pid;
950 ts_st = pcr_st->priv_data;
952 if (ts->mux_rate > 1) {
953 service->pcr_packet_period = (int64_t)ts->mux_rate * ts->pcr_period /
954 (TS_PACKET_SIZE * 8 * 1000);
955 ts->sdt_packet_period = (int64_t)ts->mux_rate * SDT_RETRANS_TIME /
956 (TS_PACKET_SIZE * 8 * 1000);
957 ts->pat_packet_period = (int64_t)ts->mux_rate * PAT_RETRANS_TIME /
958 (TS_PACKET_SIZE * 8 * 1000);
961 ts->first_pcr = av_rescale(s->max_delay, PCR_TIME_BASE, AV_TIME_BASE);
963 /* Arbitrary values, PAT/PMT will also be written on video key frames */
964 ts->sdt_packet_period = 200;
965 ts->pat_packet_period = 40;
966 if (pcr_st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
967 int frame_size = av_get_audio_frame_duration2(pcr_st->codecpar, 0);
969 av_log(s, AV_LOG_WARNING, "frame size not set\n");
970 service->pcr_packet_period =
971 pcr_st->codecpar->sample_rate / (10 * 512);
973 service->pcr_packet_period =
974 pcr_st->codecpar->sample_rate / (10 * frame_size);
977 // max delta PCR 0.1s
978 // TODO: should be avg_frame_rate
979 service->pcr_packet_period =
980 ts_st->user_tb.den / (10 * ts_st->user_tb.num);
982 if (!service->pcr_packet_period)
983 service->pcr_packet_period = 1;
986 ts->last_pat_ts = AV_NOPTS_VALUE;
987 ts->last_sdt_ts = AV_NOPTS_VALUE;
988 // The user specified a period, use only it
989 if (ts->pat_period < INT_MAX/2) {
990 ts->pat_packet_period = INT_MAX;
992 if (ts->sdt_period < INT_MAX/2) {
993 ts->sdt_packet_period = INT_MAX;
996 // output a PCR as soon as possible
997 service->pcr_packet_count = service->pcr_packet_period;
998 ts->pat_packet_count = ts->pat_packet_period - 1;
999 ts->sdt_packet_count = ts->sdt_packet_period - 1;
1001 if (ts->mux_rate == 1)
1002 av_log(s, AV_LOG_VERBOSE, "muxrate VBR, ");
1004 av_log(s, AV_LOG_VERBOSE, "muxrate %d, ", ts->mux_rate);
1005 av_log(s, AV_LOG_VERBOSE,
1006 "pcr every %d pkts, sdt every %d, pat/pmt every %d pkts\n",
1007 service->pcr_packet_period,
1008 ts->sdt_packet_period, ts->pat_packet_period);
1010 if (ts->m2ts_mode == -1) {
1011 if (av_match_ext(s->filename, "m2ts")) {
1025 /* send SDT, PAT and PMT tables regularly */
1026 static void retransmit_si_info(AVFormatContext *s, int force_pat, int64_t dts)
1028 MpegTSWrite *ts = s->priv_data;
1031 if (++ts->sdt_packet_count == ts->sdt_packet_period ||
1032 (dts != AV_NOPTS_VALUE && ts->last_sdt_ts == AV_NOPTS_VALUE) ||
1033 (dts != AV_NOPTS_VALUE && dts - ts->last_sdt_ts >= ts->sdt_period*90000.0)
1035 ts->sdt_packet_count = 0;
1036 if (dts != AV_NOPTS_VALUE)
1037 ts->last_sdt_ts = FFMAX(dts, ts->last_sdt_ts);
1038 mpegts_write_sdt(s);
1040 if (++ts->pat_packet_count == ts->pat_packet_period ||
1041 (dts != AV_NOPTS_VALUE && ts->last_pat_ts == AV_NOPTS_VALUE) ||
1042 (dts != AV_NOPTS_VALUE && dts - ts->last_pat_ts >= ts->pat_period*90000.0) ||
1044 ts->pat_packet_count = 0;
1045 if (dts != AV_NOPTS_VALUE)
1046 ts->last_pat_ts = FFMAX(dts, ts->last_pat_ts);
1047 mpegts_write_pat(s);
1048 for (i = 0; i < ts->nb_services; i++)
1049 mpegts_write_pmt(s, ts->services[i]);
1053 static int write_pcr_bits(uint8_t *buf, int64_t pcr)
1055 int64_t pcr_low = pcr % 300, pcr_high = pcr / 300;
1057 *buf++ = pcr_high >> 25;
1058 *buf++ = pcr_high >> 17;
1059 *buf++ = pcr_high >> 9;
1060 *buf++ = pcr_high >> 1;
1061 *buf++ = pcr_high << 7 | pcr_low >> 8 | 0x7e;
1067 /* Write a single null transport stream packet */
1068 static void mpegts_insert_null_packet(AVFormatContext *s)
1071 uint8_t buf[TS_PACKET_SIZE];
1078 memset(q, 0x0FF, TS_PACKET_SIZE - (q - buf));
1079 mpegts_prefix_m2ts_header(s);
1080 avio_write(s->pb, buf, TS_PACKET_SIZE);
1083 /* Write a single transport stream packet with a PCR and no payload */
1084 static void mpegts_insert_pcr_only(AVFormatContext *s, AVStream *st)
1086 MpegTSWrite *ts = s->priv_data;
1087 MpegTSWriteStream *ts_st = st->priv_data;
1089 uint8_t buf[TS_PACKET_SIZE];
1093 *q++ = ts_st->pid >> 8;
1095 *q++ = 0x20 | ts_st->cc; /* Adaptation only */
1096 /* Continuity Count field does not increment (see 13818-1 section 2.4.3.3) */
1097 *q++ = TS_PACKET_SIZE - 5; /* Adaptation Field Length */
1098 *q++ = 0x10; /* Adaptation flags: PCR present */
1099 if (ts_st->discontinuity) {
1101 ts_st->discontinuity = 0;
1104 /* PCR coded into 6 bytes */
1105 q += write_pcr_bits(q, get_pcr(ts, s->pb));
1107 /* stuffing bytes */
1108 memset(q, 0xFF, TS_PACKET_SIZE - (q - buf));
1109 mpegts_prefix_m2ts_header(s);
1110 avio_write(s->pb, buf, TS_PACKET_SIZE);
1113 static void write_pts(uint8_t *q, int fourbits, int64_t pts)
1117 val = fourbits << 4 | (((pts >> 30) & 0x07) << 1) | 1;
1119 val = (((pts >> 15) & 0x7fff) << 1) | 1;
1122 val = (((pts) & 0x7fff) << 1) | 1;
1127 /* Set an adaptation field flag in an MPEG-TS packet*/
1128 static void set_af_flag(uint8_t *pkt, int flag)
1130 // expect at least one flag to set
1133 if ((pkt[3] & 0x20) == 0) {
1134 // no AF yet, set adaptation field flag
1136 // 1 byte length, no flags
1143 /* Extend the adaptation field by size bytes */
1144 static void extend_af(uint8_t *pkt, int size)
1146 // expect already existing adaptation field
1147 av_assert0(pkt[3] & 0x20);
1151 /* Get a pointer to MPEG-TS payload (right after TS packet header) */
1152 static uint8_t *get_ts_payload_start(uint8_t *pkt)
1155 return pkt + 5 + pkt[4];
1160 /* Add a PES header to the front of the payload, and segment into an integer
1161 * number of TS packets. The final TS packet is padded using an oversized
1162 * adaptation header to exactly fill the last TS packet.
1163 * NOTE: 'payload' contains a complete PES payload. */
1164 static void mpegts_write_pes(AVFormatContext *s, AVStream *st,
1165 const uint8_t *payload, int payload_size,
1166 int64_t pts, int64_t dts, int key, int stream_id)
1168 MpegTSWriteStream *ts_st = st->priv_data;
1169 MpegTSWrite *ts = s->priv_data;
1170 uint8_t buf[TS_PACKET_SIZE];
1172 int val, is_start, len, header_len, write_pcr, is_dvb_subtitle, is_dvb_teletext, flags;
1173 int afc_len, stuffing_len;
1174 int64_t pcr = -1; /* avoid warning */
1175 int64_t delay = av_rescale(s->max_delay, 90000, AV_TIME_BASE);
1176 int force_pat = st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO && key && !ts_st->prev_payload_key;
1178 av_assert0(ts_st->payload != buf || st->codecpar->codec_type != AVMEDIA_TYPE_VIDEO);
1179 if (ts->flags & MPEGTS_FLAG_PAT_PMT_AT_FRAMES && st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
1184 while (payload_size > 0) {
1185 retransmit_si_info(s, force_pat, dts);
1189 if (ts_st->pid == ts_st->service->pcr_pid) {
1190 if (ts->mux_rate > 1 || is_start) // VBR pcr period is based on frames
1191 ts_st->service->pcr_packet_count++;
1192 if (ts_st->service->pcr_packet_count >=
1193 ts_st->service->pcr_packet_period) {
1194 ts_st->service->pcr_packet_count = 0;
1199 if (ts->mux_rate > 1 && dts != AV_NOPTS_VALUE &&
1200 (dts - get_pcr(ts, s->pb) / 300) > delay) {
1201 /* pcr insert gets priority over null packet insert */
1203 mpegts_insert_pcr_only(s, st);
1205 mpegts_insert_null_packet(s);
1206 /* recalculate write_pcr and possibly retransmit si_info */
1210 /* prepare packet header */
1213 val = ts_st->pid >> 8;
1218 ts_st->cc = ts_st->cc + 1 & 0xf;
1219 *q++ = 0x10 | ts_st->cc; // payload indicator + CC
1220 if (ts_st->discontinuity) {
1221 set_af_flag(buf, 0x80);
1222 q = get_ts_payload_start(buf);
1223 ts_st->discontinuity = 0;
1225 if (key && is_start && pts != AV_NOPTS_VALUE) {
1226 // set Random Access for key frames
1227 if (ts_st->pid == ts_st->service->pcr_pid)
1229 set_af_flag(buf, 0x40);
1230 q = get_ts_payload_start(buf);
1233 set_af_flag(buf, 0x10);
1234 q = get_ts_payload_start(buf);
1235 // add 11, pcr references the last byte of program clock reference base
1236 if (ts->mux_rate > 1)
1237 pcr = get_pcr(ts, s->pb);
1239 pcr = (dts - delay) * 300;
1240 if (dts != AV_NOPTS_VALUE && dts < pcr / 300)
1241 av_log(s, AV_LOG_WARNING, "dts < pcr, TS is invalid\n");
1242 extend_af(buf, write_pcr_bits(q, pcr));
1243 q = get_ts_payload_start(buf);
1246 int pes_extension = 0;
1247 int pes_header_stuffing_bytes = 0;
1248 /* write PES header */
1252 is_dvb_subtitle = 0;
1253 is_dvb_teletext = 0;
1254 if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
1255 if (st->codecpar->codec_id == AV_CODEC_ID_DIRAC)
1259 } else if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO &&
1260 (st->codecpar->codec_id == AV_CODEC_ID_MP2 ||
1261 st->codecpar->codec_id == AV_CODEC_ID_MP3 ||
1262 st->codecpar->codec_id == AV_CODEC_ID_AAC)) {
1264 } else if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO &&
1265 st->codecpar->codec_id == AV_CODEC_ID_AC3 &&
1268 } else if (st->codecpar->codec_type == AVMEDIA_TYPE_DATA &&
1269 st->codecpar->codec_id == AV_CODEC_ID_TIMED_ID3) {
1271 } else if (st->codecpar->codec_type == AVMEDIA_TYPE_DATA) {
1272 *q++ = stream_id != -1 ? stream_id : 0xfc;
1274 if (stream_id == 0xbd) /* asynchronous KLV */
1275 pts = dts = AV_NOPTS_VALUE;
1278 if (st->codecpar->codec_type == AVMEDIA_TYPE_SUBTITLE) {
1279 if (st->codecpar->codec_id == AV_CODEC_ID_DVB_SUBTITLE) {
1280 is_dvb_subtitle = 1;
1281 } else if (st->codecpar->codec_id == AV_CODEC_ID_DVB_TELETEXT) {
1282 is_dvb_teletext = 1;
1288 if (pts != AV_NOPTS_VALUE) {
1292 if (dts != AV_NOPTS_VALUE && pts != AV_NOPTS_VALUE && dts != pts) {
1296 if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO &&
1297 st->codecpar->codec_id == AV_CODEC_ID_DIRAC) {
1298 /* set PES_extension_flag */
1302 /* One byte for PES2 extension flag +
1303 * one byte for extension length +
1304 * one byte for extension id */
1307 /* for Blu-ray AC3 Audio the PES Extension flag should be as follow
1308 * otherwise it will not play sound on blu-ray
1310 if (ts->m2ts_mode &&
1311 st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO &&
1312 st->codecpar->codec_id == AV_CODEC_ID_AC3) {
1313 /* set PES_extension_flag */
1318 if (is_dvb_teletext) {
1319 pes_header_stuffing_bytes = 0x24 - header_len;
1322 len = payload_size + header_len + 3;
1323 /* 3 extra bytes should be added to DVB subtitle payload: 0x20 0x00 at the beginning and trailing 0xff */
1324 if (is_dvb_subtitle) {
1330 if (ts->omit_video_pes_length && st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
1336 /* data alignment indicator is required for subtitle and data streams */
1337 if (st->codecpar->codec_type == AVMEDIA_TYPE_SUBTITLE || st->codecpar->codec_type == AVMEDIA_TYPE_DATA)
1342 if (pts != AV_NOPTS_VALUE) {
1343 write_pts(q, flags >> 6, pts);
1346 if (dts != AV_NOPTS_VALUE && pts != AV_NOPTS_VALUE && dts != pts) {
1347 write_pts(q, 1, dts);
1350 if (pes_extension && st->codecpar->codec_id == AV_CODEC_ID_DIRAC) {
1351 flags = 0x01; /* set PES_extension_flag_2 */
1353 *q++ = 0x80 | 0x01; /* marker bit + extension length */
1354 /* Set the stream ID extension flag bit to 0 and
1355 * write the extended stream ID. */
1358 /* For Blu-ray AC3 Audio Setting extended flags */
1359 if (ts->m2ts_mode &&
1361 st->codecpar->codec_id == AV_CODEC_ID_AC3) {
1362 flags = 0x01; /* set PES_extension_flag_2 */
1364 *q++ = 0x80 | 0x01; /* marker bit + extension length */
1365 *q++ = 0x00 | 0x71; /* for AC3 Audio (specifically on blue-rays) */
1369 if (is_dvb_subtitle) {
1370 /* First two fields of DVB subtitles PES data:
1371 * data_identifier: for DVB subtitle streams shall be coded with the value 0x20
1372 * subtitle_stream_id: for DVB subtitle stream shall be identified by the value 0x00 */
1376 if (is_dvb_teletext) {
1377 memset(q, 0xff, pes_header_stuffing_bytes);
1378 q += pes_header_stuffing_bytes;
1383 header_len = q - buf;
1385 len = TS_PACKET_SIZE - header_len;
1386 if (len > payload_size)
1388 stuffing_len = TS_PACKET_SIZE - header_len - len;
1389 if (stuffing_len > 0) {
1390 /* add stuffing with AFC */
1391 if (buf[3] & 0x20) {
1392 /* stuffing already present: increase its size */
1393 afc_len = buf[4] + 1;
1394 memmove(buf + 4 + afc_len + stuffing_len,
1396 header_len - (4 + afc_len));
1397 buf[4] += stuffing_len;
1398 memset(buf + 4 + afc_len, 0xff, stuffing_len);
1401 memmove(buf + 4 + stuffing_len, buf + 4, header_len - 4);
1403 buf[4] = stuffing_len - 1;
1404 if (stuffing_len >= 2) {
1406 memset(buf + 6, 0xff, stuffing_len - 2);
1411 if (is_dvb_subtitle && payload_size == len) {
1412 memcpy(buf + TS_PACKET_SIZE - len, payload, len - 1);
1413 buf[TS_PACKET_SIZE - 1] = 0xff; /* end_of_PES_data_field_marker: an 8-bit field with fixed contents 0xff for DVB subtitle */
1415 memcpy(buf + TS_PACKET_SIZE - len, payload, len);
1419 payload_size -= len;
1420 mpegts_prefix_m2ts_header(s);
1421 avio_write(s->pb, buf, TS_PACKET_SIZE);
1423 ts_st->prev_payload_key = key;
1426 int ff_check_h264_startcode(AVFormatContext *s, const AVStream *st, const AVPacket *pkt)
1428 if (pkt->size < 5 || AV_RB32(pkt->data) != 0x0000001 && AV_RB24(pkt->data) != 0x000001) {
1429 if (!st->nb_frames) {
1430 av_log(s, AV_LOG_ERROR, "H.264 bitstream malformed, "
1431 "no startcode found, use the video bitstream filter 'h264_mp4toannexb' to fix it "
1432 "('-bsf:v h264_mp4toannexb' option with ffmpeg)\n");
1433 return AVERROR_INVALIDDATA;
1435 av_log(s, AV_LOG_WARNING, "H.264 bitstream error, startcode missing, size %d", pkt->size);
1436 if (pkt->size) av_log(s, AV_LOG_WARNING, " data %08X", AV_RB32(pkt->data));
1437 av_log(s, AV_LOG_WARNING, "\n");
1442 static int check_hevc_startcode(AVFormatContext *s, const AVStream *st, const AVPacket *pkt)
1444 if (pkt->size < 5 || AV_RB32(pkt->data) != 0x0000001 && AV_RB24(pkt->data) != 0x000001) {
1445 if (!st->nb_frames) {
1446 av_log(s, AV_LOG_ERROR, "HEVC bitstream malformed, no startcode found\n");
1447 return AVERROR_PATCHWELCOME;
1449 av_log(s, AV_LOG_WARNING, "HEVC bitstream error, startcode missing, size %d", pkt->size);
1450 if (pkt->size) av_log(s, AV_LOG_WARNING, " data %08X", AV_RB32(pkt->data));
1451 av_log(s, AV_LOG_WARNING, "\n");
1456 /* Based on GStreamer's gst-plugins-base/ext/ogg/gstoggstream.c
1457 * Released under the LGPL v2.1+, written by
1458 * Vincent Penquerc'h <vincent.penquerch@collabora.co.uk>
1460 static int opus_get_packet_samples(AVFormatContext *s, AVPacket *pkt)
1462 static const int durations[32] = {
1463 480, 960, 1920, 2880, /* Silk NB */
1464 480, 960, 1920, 2880, /* Silk MB */
1465 480, 960, 1920, 2880, /* Silk WB */
1466 480, 960, /* Hybrid SWB */
1467 480, 960, /* Hybrid FB */
1468 120, 240, 480, 960, /* CELT NB */
1469 120, 240, 480, 960, /* CELT NB */
1470 120, 240, 480, 960, /* CELT NB */
1471 120, 240, 480, 960, /* CELT NB */
1473 int toc, frame_duration, nframes, duration;
1480 frame_duration = durations[toc >> 3];
1494 nframes = pkt->data[1] & 63;
1498 duration = nframes * frame_duration;
1499 if (duration > 5760) {
1500 av_log(s, AV_LOG_WARNING,
1501 "Opus packet duration > 120 ms, invalid");
1508 static int mpegts_write_packet_internal(AVFormatContext *s, AVPacket *pkt)
1510 AVStream *st = s->streams[pkt->stream_index];
1511 int size = pkt->size;
1512 uint8_t *buf = pkt->data;
1513 uint8_t *data = NULL;
1514 MpegTSWrite *ts = s->priv_data;
1515 MpegTSWriteStream *ts_st = st->priv_data;
1516 const int64_t delay = av_rescale(s->max_delay, 90000, AV_TIME_BASE) * 2;
1517 int64_t dts = pkt->dts, pts = pkt->pts;
1518 int opus_samples = 0;
1520 char *side_data = NULL;
1523 side_data = av_packet_get_side_data(pkt,
1524 AV_PKT_DATA_MPEGTS_STREAM_ID,
1527 stream_id = side_data[0];
1529 if (ts->reemit_pat_pmt) {
1530 av_log(s, AV_LOG_WARNING,
1531 "resend_headers option is deprecated, use -mpegts_flags resend_headers\n");
1532 ts->reemit_pat_pmt = 0;
1533 ts->flags |= MPEGTS_FLAG_REEMIT_PAT_PMT;
1536 if (ts->flags & MPEGTS_FLAG_REEMIT_PAT_PMT) {
1537 ts->pat_packet_count = ts->pat_packet_period - 1;
1538 ts->sdt_packet_count = ts->sdt_packet_period - 1;
1539 ts->flags &= ~MPEGTS_FLAG_REEMIT_PAT_PMT;
1542 if (ts->copyts < 1) {
1543 if (pts != AV_NOPTS_VALUE)
1545 if (dts != AV_NOPTS_VALUE)
1549 if (ts_st->first_pts_check && pts == AV_NOPTS_VALUE) {
1550 av_log(s, AV_LOG_ERROR, "first pts value must be set\n");
1551 return AVERROR_INVALIDDATA;
1553 ts_st->first_pts_check = 0;
1555 if (st->codecpar->codec_id == AV_CODEC_ID_H264) {
1556 const uint8_t *p = buf, *buf_end = p + size;
1557 uint32_t state = -1;
1558 int extradd = (pkt->flags & AV_PKT_FLAG_KEY) ? st->codecpar->extradata_size : 0;
1559 int ret = ff_check_h264_startcode(s, st, pkt);
1563 if (extradd && AV_RB24(st->codecpar->extradata) > 1)
1567 p = avpriv_find_start_code(p, buf_end, &state);
1568 av_log(s, AV_LOG_TRACE, "nal %d\n", state & 0x1f);
1569 if ((state & 0x1f) == 7)
1571 } while (p < buf_end && (state & 0x1f) != 9 &&
1572 (state & 0x1f) != 5 && (state & 0x1f) != 1);
1574 if ((state & 0x1f) != 5)
1576 if ((state & 0x1f) != 9) { // AUD NAL
1577 data = av_malloc(pkt->size + 6 + extradd);
1579 return AVERROR(ENOMEM);
1580 memcpy(data + 6, st->codecpar->extradata, extradd);
1581 memcpy(data + 6 + extradd, pkt->data, pkt->size);
1582 AV_WB32(data, 0x00000001);
1584 data[5] = 0xf0; // any slice type (0xe) + rbsp stop one bit
1586 size = pkt->size + 6 + extradd;
1588 } else if (st->codecpar->codec_id == AV_CODEC_ID_AAC) {
1589 if (pkt->size < 2) {
1590 av_log(s, AV_LOG_ERROR, "AAC packet too short\n");
1591 return AVERROR_INVALIDDATA;
1593 if ((AV_RB16(pkt->data) & 0xfff0) != 0xfff0) {
1598 av_log(s, AV_LOG_ERROR, "AAC bitstream not in ADTS format "
1599 "and extradata missing\n");
1601 av_init_packet(&pkt2);
1602 pkt2.data = pkt->data;
1603 pkt2.size = pkt->size;
1604 av_assert0(pkt->dts != AV_NOPTS_VALUE);
1605 pkt2.dts = av_rescale_q(pkt->dts, st->time_base, ts_st->amux->streams[0]->time_base);
1607 ret = avio_open_dyn_buf(&ts_st->amux->pb);
1609 return AVERROR(ENOMEM);
1611 ret = av_write_frame(ts_st->amux, &pkt2);
1613 ffio_free_dyn_buf(&ts_st->amux->pb);
1616 size = avio_close_dyn_buf(ts_st->amux->pb, &data);
1617 ts_st->amux->pb = NULL;
1621 } else if (st->codecpar->codec_id == AV_CODEC_ID_HEVC) {
1622 int ret = check_hevc_startcode(s, st, pkt);
1625 } else if (st->codecpar->codec_id == AV_CODEC_ID_OPUS) {
1626 if (pkt->size < 2) {
1627 av_log(s, AV_LOG_ERROR, "Opus packet too short\n");
1628 return AVERROR_INVALIDDATA;
1631 /* Add Opus control header */
1632 if ((AV_RB16(pkt->data) >> 5) != 0x3ff) {
1636 int ctrl_header_size;
1637 int trim_start = 0, trim_end = 0;
1639 opus_samples = opus_get_packet_samples(s, pkt);
1641 side_data = av_packet_get_side_data(pkt,
1642 AV_PKT_DATA_SKIP_SAMPLES,
1645 if (side_data && side_data_size >= 10) {
1646 trim_end = AV_RL32(side_data + 4) * 48000 / st->codecpar->sample_rate;
1649 ctrl_header_size = pkt->size + 2 + pkt->size / 255 + 1;
1650 if (ts_st->opus_pending_trim_start)
1651 ctrl_header_size += 2;
1653 ctrl_header_size += 2;
1655 data = av_malloc(ctrl_header_size);
1657 return AVERROR(ENOMEM);
1661 if (ts_st->opus_pending_trim_start)
1669 data[i] = FFMIN(n, 255);
1674 av_assert0(2 + pkt->size / 255 + 1 == i);
1676 if (ts_st->opus_pending_trim_start) {
1677 trim_start = FFMIN(ts_st->opus_pending_trim_start, opus_samples);
1678 AV_WB16(data + i, trim_start);
1680 ts_st->opus_pending_trim_start -= trim_start;
1683 trim_end = FFMIN(trim_end, opus_samples - trim_start);
1684 AV_WB16(data + i, trim_end);
1688 memcpy(data + i, pkt->data, pkt->size);
1690 size = ctrl_header_size;
1692 /* TODO: Can we get TS formatted data here? If so we will
1693 * need to count the samples of that too! */
1694 av_log(s, AV_LOG_WARNING, "Got MPEG-TS formatted Opus data, unhandled");
1698 if (pkt->dts != AV_NOPTS_VALUE) {
1700 for(i=0; i<s->nb_streams; i++) {
1701 AVStream *st2 = s->streams[i];
1702 MpegTSWriteStream *ts_st2 = st2->priv_data;
1703 if ( ts_st2->payload_size
1704 && (ts_st2->payload_dts == AV_NOPTS_VALUE || dts - ts_st2->payload_dts > delay/2)) {
1705 mpegts_write_pes(s, st2, ts_st2->payload, ts_st2->payload_size,
1706 ts_st2->payload_pts, ts_st2->payload_dts,
1707 ts_st2->payload_flags & AV_PKT_FLAG_KEY, stream_id);
1708 ts_st2->payload_size = 0;
1713 if (ts_st->payload_size && (ts_st->payload_size + size > ts->pes_payload_size ||
1714 (dts != AV_NOPTS_VALUE && ts_st->payload_dts != AV_NOPTS_VALUE &&
1715 av_compare_ts(dts - ts_st->payload_dts, st->time_base,
1716 s->max_delay, AV_TIME_BASE_Q) >= 0) ||
1717 ts_st->opus_queued_samples + opus_samples >= 5760 /* 120ms */)) {
1718 mpegts_write_pes(s, st, ts_st->payload, ts_st->payload_size,
1719 ts_st->payload_pts, ts_st->payload_dts,
1720 ts_st->payload_flags & AV_PKT_FLAG_KEY, stream_id);
1721 ts_st->payload_size = 0;
1722 ts_st->opus_queued_samples = 0;
1725 if (st->codecpar->codec_type != AVMEDIA_TYPE_AUDIO || size > ts->pes_payload_size) {
1726 av_assert0(!ts_st->payload_size);
1727 // for video and subtitle, write a single pes packet
1728 mpegts_write_pes(s, st, buf, size, pts, dts,
1729 pkt->flags & AV_PKT_FLAG_KEY, stream_id);
1730 ts_st->opus_queued_samples = 0;
1735 if (!ts_st->payload_size) {
1736 ts_st->payload_pts = pts;
1737 ts_st->payload_dts = dts;
1738 ts_st->payload_flags = pkt->flags;
1741 memcpy(ts_st->payload + ts_st->payload_size, buf, size);
1742 ts_st->payload_size += size;
1743 ts_st->opus_queued_samples += opus_samples;
1750 static void mpegts_write_flush(AVFormatContext *s)
1754 /* flush current packets */
1755 for (i = 0; i < s->nb_streams; i++) {
1756 AVStream *st = s->streams[i];
1757 MpegTSWriteStream *ts_st = st->priv_data;
1758 if (ts_st->payload_size > 0) {
1759 mpegts_write_pes(s, st, ts_st->payload, ts_st->payload_size,
1760 ts_st->payload_pts, ts_st->payload_dts,
1761 ts_st->payload_flags & AV_PKT_FLAG_KEY, -1);
1762 ts_st->payload_size = 0;
1763 ts_st->opus_queued_samples = 0;
1768 static int mpegts_write_packet(AVFormatContext *s, AVPacket *pkt)
1771 mpegts_write_flush(s);
1774 return mpegts_write_packet_internal(s, pkt);
1778 static int mpegts_write_end(AVFormatContext *s)
1781 mpegts_write_flush(s);
1786 static void mpegts_deinit(AVFormatContext *s)
1788 MpegTSWrite *ts = s->priv_data;
1789 MpegTSService *service;
1792 for (i = 0; i < s->nb_streams; i++) {
1793 AVStream *st = s->streams[i];
1794 MpegTSWriteStream *ts_st = st->priv_data;
1796 av_freep(&ts_st->payload);
1798 avformat_free_context(ts_st->amux);
1804 for (i = 0; i < ts->nb_services; i++) {
1805 service = ts->services[i];
1806 av_freep(&service->provider_name);
1807 av_freep(&service->name);
1810 av_freep(&ts->services);
1813 static int mpegts_check_bitstream(struct AVFormatContext *s, const AVPacket *pkt)
1816 AVStream *st = s->streams[pkt->stream_index];
1818 if (st->codecpar->codec_id == AV_CODEC_ID_H264) {
1819 if (pkt->size >= 5 && AV_RB32(pkt->data) != 0x0000001 &&
1820 (AV_RB24(pkt->data) != 0x000001 ||
1821 (st->codecpar->extradata_size > 0 &&
1822 st->codecpar->extradata[0] == 1)))
1823 ret = ff_stream_add_bitstream_filter(st, "h264_mp4toannexb", NULL);
1824 } else if (st->codecpar->codec_id == AV_CODEC_ID_HEVC) {
1825 if (pkt->size >= 5 && AV_RB32(pkt->data) != 0x0000001 &&
1826 (AV_RB24(pkt->data) != 0x000001 ||
1827 (st->codecpar->extradata_size > 0 &&
1828 st->codecpar->extradata[0] == 1)))
1829 ret = ff_stream_add_bitstream_filter(st, "hevc_mp4toannexb", NULL);
1835 static const AVOption options[] = {
1836 { "mpegts_transport_stream_id", "Set transport_stream_id field.",
1837 offsetof(MpegTSWrite, transport_stream_id), AV_OPT_TYPE_INT,
1838 { .i64 = 0x0001 }, 0x0001, 0xffff, AV_OPT_FLAG_ENCODING_PARAM },
1839 { "mpegts_original_network_id", "Set original_network_id field.",
1840 offsetof(MpegTSWrite, original_network_id), AV_OPT_TYPE_INT,
1841 { .i64 = DVB_PRIVATE_NETWORK_START }, 0x0001, 0xffff, AV_OPT_FLAG_ENCODING_PARAM },
1842 { "mpegts_service_id", "Set service_id field.",
1843 offsetof(MpegTSWrite, service_id), AV_OPT_TYPE_INT,
1844 { .i64 = 0x0001 }, 0x0001, 0xffff, AV_OPT_FLAG_ENCODING_PARAM },
1845 { "mpegts_service_type", "Set service_type field.",
1846 offsetof(MpegTSWrite, service_type), AV_OPT_TYPE_INT,
1847 { .i64 = 0x01 }, 0x01, 0xff, AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
1848 { "digital_tv", "Digital Television.",
1849 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_DIGITAL_TV }, 0x01, 0xff,
1850 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
1851 { "digital_radio", "Digital Radio.",
1852 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_DIGITAL_RADIO }, 0x01, 0xff,
1853 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
1854 { "teletext", "Teletext.",
1855 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_TELETEXT }, 0x01, 0xff,
1856 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
1857 { "advanced_codec_digital_radio", "Advanced Codec Digital Radio.",
1858 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_ADVANCED_CODEC_DIGITAL_RADIO }, 0x01, 0xff,
1859 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
1860 { "mpeg2_digital_hdtv", "MPEG2 Digital HDTV.",
1861 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_MPEG2_DIGITAL_HDTV }, 0x01, 0xff,
1862 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
1863 { "advanced_codec_digital_sdtv", "Advanced Codec Digital SDTV.",
1864 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_ADVANCED_CODEC_DIGITAL_SDTV }, 0x01, 0xff,
1865 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
1866 { "advanced_codec_digital_hdtv", "Advanced Codec Digital HDTV.",
1867 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_ADVANCED_CODEC_DIGITAL_HDTV }, 0x01, 0xff,
1868 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
1869 { "hevc_digital_hdtv", "HEVC Digital Television Service.",
1870 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_HEVC_DIGITAL_HDTV }, 0x01, 0xff,
1871 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
1872 { "mpegts_pmt_start_pid", "Set the first pid of the PMT.",
1873 offsetof(MpegTSWrite, pmt_start_pid), AV_OPT_TYPE_INT,
1874 { .i64 = 0x1000 }, 0x0010, 0x1f00, AV_OPT_FLAG_ENCODING_PARAM },
1875 { "mpegts_start_pid", "Set the first pid.",
1876 offsetof(MpegTSWrite, start_pid), AV_OPT_TYPE_INT,
1877 { .i64 = 0x0100 }, 0x0010, 0x0f00, AV_OPT_FLAG_ENCODING_PARAM },
1878 { "mpegts_m2ts_mode", "Enable m2ts mode.",
1879 offsetof(MpegTSWrite, m2ts_mode), AV_OPT_TYPE_BOOL,
1880 { .i64 = -1 }, -1, 1, AV_OPT_FLAG_ENCODING_PARAM },
1882 offsetof(MpegTSWrite, mux_rate), AV_OPT_TYPE_INT,
1883 { .i64 = 1 }, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
1884 { "pes_payload_size", "Minimum PES packet payload in bytes",
1885 offsetof(MpegTSWrite, pes_payload_size), AV_OPT_TYPE_INT,
1886 { .i64 = DEFAULT_PES_PAYLOAD_SIZE }, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
1887 { "mpegts_flags", "MPEG-TS muxing flags",
1888 offsetof(MpegTSWrite, flags), AV_OPT_TYPE_FLAGS, { .i64 = 0 }, 0, INT_MAX,
1889 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_flags" },
1890 { "resend_headers", "Reemit PAT/PMT before writing the next packet",
1891 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_FLAG_REEMIT_PAT_PMT }, 0, INT_MAX,
1892 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_flags" },
1893 { "latm", "Use LATM packetization for AAC",
1894 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_FLAG_AAC_LATM }, 0, INT_MAX,
1895 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_flags" },
1896 { "pat_pmt_at_frames", "Reemit PAT and PMT at each video frame",
1897 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_FLAG_PAT_PMT_AT_FRAMES}, 0, INT_MAX,
1898 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_flags" },
1899 { "system_b", "Conform to System B (DVB) instead of System A (ATSC)",
1900 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_FLAG_SYSTEM_B }, 0, INT_MAX,
1901 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_flags" },
1902 { "initial_discontinuity", "Mark initial packets as discontinuous",
1903 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_FLAG_DISCONT }, 0, INT_MAX,
1904 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_flags" },
1905 // backward compatibility
1906 { "resend_headers", "Reemit PAT/PMT before writing the next packet",
1907 offsetof(MpegTSWrite, reemit_pat_pmt), AV_OPT_TYPE_INT,
1908 { .i64 = 0 }, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
1909 { "mpegts_copyts", "don't offset dts/pts",
1910 offsetof(MpegTSWrite, copyts), AV_OPT_TYPE_BOOL,
1911 { .i64 = -1 }, -1, 1, AV_OPT_FLAG_ENCODING_PARAM },
1912 { "tables_version", "set PAT, PMT and SDT version",
1913 offsetof(MpegTSWrite, tables_version), AV_OPT_TYPE_INT,
1914 { .i64 = 0 }, 0, 31, AV_OPT_FLAG_ENCODING_PARAM },
1915 { "omit_video_pes_length", "Omit the PES packet length for video packets",
1916 offsetof(MpegTSWrite, omit_video_pes_length), AV_OPT_TYPE_BOOL,
1917 { .i64 = 1 }, 0, 1, AV_OPT_FLAG_ENCODING_PARAM },
1918 { "pcr_period", "PCR retransmission time",
1919 offsetof(MpegTSWrite, pcr_period), AV_OPT_TYPE_INT,
1920 { .i64 = PCR_RETRANS_TIME }, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
1921 { "pat_period", "PAT/PMT retransmission time limit in seconds",
1922 offsetof(MpegTSWrite, pat_period), AV_OPT_TYPE_DOUBLE,
1923 { .dbl = INT_MAX }, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
1924 { "sdt_period", "SDT retransmission time limit in seconds",
1925 offsetof(MpegTSWrite, sdt_period), AV_OPT_TYPE_DOUBLE,
1926 { .dbl = INT_MAX }, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
1930 static const AVClass mpegts_muxer_class = {
1931 .class_name = "MPEGTS muxer",
1932 .item_name = av_default_item_name,
1934 .version = LIBAVUTIL_VERSION_INT,
1937 AVOutputFormat ff_mpegts_muxer = {
1939 .long_name = NULL_IF_CONFIG_SMALL("MPEG-TS (MPEG-2 Transport Stream)"),
1940 .mime_type = "video/MP2T",
1941 .extensions = "ts,m2t,m2ts,mts",
1942 .priv_data_size = sizeof(MpegTSWrite),
1943 .audio_codec = AV_CODEC_ID_MP2,
1944 .video_codec = AV_CODEC_ID_MPEG2VIDEO,
1945 .init = mpegts_init,
1946 .write_packet = mpegts_write_packet,
1947 .write_trailer = mpegts_write_end,
1948 .deinit = mpegts_deinit,
1949 .check_bitstream = mpegts_check_bitstream,
1950 .flags = AVFMT_ALLOW_FLUSH | AVFMT_VARIABLE_FPS,
1951 .priv_class = &mpegts_muxer_class,