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 {
49 void (*write_packet)(struct MpegTSSection *s, const uint8_t *packet);
53 typedef struct MpegTSService {
54 MpegTSSection pmt; /* MPEG-2 PMT table context */
55 int sid; /* service ID */
60 int pcr_packet_period;
64 // service_type values as defined in ETSI 300 468
66 MPEGTS_SERVICE_TYPE_DIGITAL_TV = 0x01,
67 MPEGTS_SERVICE_TYPE_DIGITAL_RADIO = 0x02,
68 MPEGTS_SERVICE_TYPE_TELETEXT = 0x03,
69 MPEGTS_SERVICE_TYPE_ADVANCED_CODEC_DIGITAL_RADIO = 0x0A,
70 MPEGTS_SERVICE_TYPE_MPEG2_DIGITAL_HDTV = 0x11,
71 MPEGTS_SERVICE_TYPE_ADVANCED_CODEC_DIGITAL_SDTV = 0x16,
72 MPEGTS_SERVICE_TYPE_ADVANCED_CODEC_DIGITAL_HDTV = 0x19,
73 MPEGTS_SERVICE_TYPE_HEVC_DIGITAL_HDTV = 0x1F,
75 typedef struct MpegTSWrite {
76 const AVClass *av_class;
77 MpegTSSection pat; /* MPEG-2 PAT table */
78 MpegTSSection sdt; /* MPEG-2 SDT table context */
79 MpegTSService **services;
81 int sdt_packet_period;
83 int pat_packet_period;
88 int mux_rate; ///< set to 1 when VBR
91 int transport_stream_id;
92 int original_network_id;
100 int reemit_pat_pmt; // backward compatibility
103 #define MPEGTS_FLAG_REEMIT_PAT_PMT 0x01
104 #define MPEGTS_FLAG_AAC_LATM 0x02
105 #define MPEGTS_FLAG_PAT_PMT_AT_FRAMES 0x04
106 #define MPEGTS_FLAG_SYSTEM_B 0x08
115 int omit_video_pes_length;
118 /* a PES packet header is generated every DEFAULT_PES_HEADER_FREQ packets */
119 #define DEFAULT_PES_HEADER_FREQ 16
120 #define DEFAULT_PES_PAYLOAD_SIZE ((DEFAULT_PES_HEADER_FREQ - 1) * 184 + 170)
122 /* The section length is 12 bits. The first 2 are set to 0, the remaining
123 * 10 bits should not exceed 1021. */
124 #define SECTION_LENGTH 1020
126 /* NOTE: 4 bytes must be left at the end for the crc32 */
127 static void mpegts_write_section(MpegTSSection *s, uint8_t *buf, int len)
130 unsigned char packet[TS_PACKET_SIZE];
131 const unsigned char *buf_ptr;
133 int first, b, len1, left;
135 crc = av_bswap32(av_crc(av_crc_get_table(AV_CRC_32_IEEE),
138 buf[len - 4] = (crc >> 24) & 0xff;
139 buf[len - 3] = (crc >> 16) & 0xff;
140 buf[len - 2] = (crc >> 8) & 0xff;
141 buf[len - 1] = crc & 0xff;
143 /* send each packet */
146 first = buf == buf_ptr;
154 s->cc = s->cc + 1 & 0xf;
157 *q++ = 0; /* 0 offset */
158 len1 = TS_PACKET_SIZE - (q - packet);
161 memcpy(q, buf_ptr, len1);
163 /* add known padding data */
164 left = TS_PACKET_SIZE - (q - packet);
166 memset(q, 0xff, left);
168 s->write_packet(s, packet);
175 static inline void put16(uint8_t **q_ptr, int val)
184 static int mpegts_write_section1(MpegTSSection *s, int tid, int id,
185 int version, int sec_num, int last_sec_num,
186 uint8_t *buf, int len)
188 uint8_t section[1024], *q;
189 unsigned int tot_len;
190 /* reserved_future_use field must be set to 1 for SDT */
191 unsigned int flags = tid == SDT_TID ? 0xf000 : 0xb000;
193 tot_len = 3 + 5 + len + 4;
194 /* check if not too big */
196 return AVERROR_INVALIDDATA;
200 put16(&q, flags | (len + 5 + 4)); /* 5 byte header + 4 byte CRC */
202 *q++ = 0xc1 | (version << 1); /* current_next_indicator = 1 */
207 mpegts_write_section(s, section, tot_len);
211 /*********************************************/
214 #define DEFAULT_PROVIDER_NAME "FFmpeg"
215 #define DEFAULT_SERVICE_NAME "Service01"
217 /* we retransmit the SI info at this rate */
218 #define SDT_RETRANS_TIME 500
219 #define PAT_RETRANS_TIME 100
220 #define PCR_RETRANS_TIME 20
222 typedef struct MpegTSWriteStream {
223 struct MpegTSService *service;
224 int pid; /* stream associated pid */
227 int first_pts_check; ///< first pts check needed
228 int prev_payload_key;
233 AVFormatContext *amux;
237 int opus_queued_samples;
238 int opus_pending_trim_start;
241 static void mpegts_write_pat(AVFormatContext *s)
243 MpegTSWrite *ts = s->priv_data;
244 MpegTSService *service;
245 uint8_t data[SECTION_LENGTH], *q;
249 for (i = 0; i < ts->nb_services; i++) {
250 service = ts->services[i];
251 put16(&q, service->sid);
252 put16(&q, 0xe000 | service->pmt.pid);
254 mpegts_write_section1(&ts->pat, PAT_TID, ts->tsid, ts->tables_version, 0, 0,
258 static int mpegts_write_pmt(AVFormatContext *s, MpegTSService *service)
260 MpegTSWrite *ts = s->priv_data;
261 uint8_t data[SECTION_LENGTH], *q, *desc_length_ptr, *program_info_length_ptr;
262 int val, stream_type, i, err = 0;
265 put16(&q, 0xe000 | service->pcr_pid);
267 program_info_length_ptr = q;
268 q += 2; /* patched after */
270 /* put program info here */
272 val = 0xf000 | (q - program_info_length_ptr - 2);
273 program_info_length_ptr[0] = val >> 8;
274 program_info_length_ptr[1] = val;
276 for (i = 0; i < s->nb_streams; i++) {
277 AVStream *st = s->streams[i];
278 MpegTSWriteStream *ts_st = st->priv_data;
279 AVDictionaryEntry *lang = av_dict_get(st->metadata, "language", NULL, 0);
281 if (s->nb_programs) {
283 AVProgram *program = service->program;
285 for (k = 0; k < program->nb_stream_indexes; k++)
286 if (program->stream_index[k] == i) {
295 if (q - data > SECTION_LENGTH - 32) {
299 switch (st->codecpar->codec_id) {
300 case AV_CODEC_ID_MPEG1VIDEO:
301 case AV_CODEC_ID_MPEG2VIDEO:
302 stream_type = STREAM_TYPE_VIDEO_MPEG2;
304 case AV_CODEC_ID_MPEG4:
305 stream_type = STREAM_TYPE_VIDEO_MPEG4;
307 case AV_CODEC_ID_H264:
308 stream_type = STREAM_TYPE_VIDEO_H264;
310 case AV_CODEC_ID_HEVC:
311 stream_type = STREAM_TYPE_VIDEO_HEVC;
313 case AV_CODEC_ID_CAVS:
314 stream_type = STREAM_TYPE_VIDEO_CAVS;
316 case AV_CODEC_ID_DIRAC:
317 stream_type = STREAM_TYPE_VIDEO_DIRAC;
319 case AV_CODEC_ID_VC1:
320 stream_type = STREAM_TYPE_VIDEO_VC1;
322 case AV_CODEC_ID_MP2:
323 case AV_CODEC_ID_MP3:
324 if ( st->codecpar->sample_rate > 0
325 && st->codecpar->sample_rate < 32000) {
326 stream_type = STREAM_TYPE_AUDIO_MPEG2;
328 stream_type = STREAM_TYPE_AUDIO_MPEG1;
331 case AV_CODEC_ID_AAC:
332 stream_type = (ts->flags & MPEGTS_FLAG_AAC_LATM)
333 ? STREAM_TYPE_AUDIO_AAC_LATM
334 : STREAM_TYPE_AUDIO_AAC;
336 case AV_CODEC_ID_AAC_LATM:
337 stream_type = STREAM_TYPE_AUDIO_AAC_LATM;
339 case AV_CODEC_ID_AC3:
340 stream_type = (ts->flags & MPEGTS_FLAG_SYSTEM_B)
341 ? STREAM_TYPE_PRIVATE_DATA
342 : STREAM_TYPE_AUDIO_AC3;
344 case AV_CODEC_ID_EAC3:
345 stream_type = (ts->flags & MPEGTS_FLAG_SYSTEM_B)
346 ? STREAM_TYPE_PRIVATE_DATA
347 : STREAM_TYPE_AUDIO_EAC3;
349 case AV_CODEC_ID_DTS:
350 stream_type = STREAM_TYPE_AUDIO_DTS;
352 case AV_CODEC_ID_TRUEHD:
353 stream_type = STREAM_TYPE_AUDIO_TRUEHD;
355 case AV_CODEC_ID_OPUS:
356 stream_type = STREAM_TYPE_PRIVATE_DATA;
358 case AV_CODEC_ID_TIMED_ID3:
359 stream_type = STREAM_TYPE_METADATA;
362 stream_type = STREAM_TYPE_PRIVATE_DATA;
367 put16(&q, 0xe000 | ts_st->pid);
369 q += 2; /* patched after */
371 /* write optional descriptors here */
372 switch (st->codecpar->codec_type) {
373 case AVMEDIA_TYPE_AUDIO:
374 if (st->codecpar->codec_id==AV_CODEC_ID_AC3 && (ts->flags & MPEGTS_FLAG_SYSTEM_B)) {
375 *q++=0x6a; // AC3 descriptor see A038 DVB SI
376 *q++=1; // 1 byte, all flags sets to 0
377 *q++=0; // omit all fields...
379 if (st->codecpar->codec_id==AV_CODEC_ID_EAC3 && (ts->flags & MPEGTS_FLAG_SYSTEM_B)) {
380 *q++=0x7a; // EAC3 descriptor see A038 DVB SI
381 *q++=1; // 1 byte, all flags sets to 0
382 *q++=0; // omit all fields...
384 if (st->codecpar->codec_id==AV_CODEC_ID_S302M) {
385 *q++ = 0x05; /* MPEG-2 registration descriptor*/
392 if (st->codecpar->codec_id==AV_CODEC_ID_OPUS) {
393 /* 6 bytes registration descriptor, 4 bytes Opus audio descriptor */
394 if (q - data > SECTION_LENGTH - 6 - 4) {
399 *q++ = 0x05; /* MPEG-2 registration descriptor*/
406 *q++ = 0x7f; /* DVB extension descriptor */
410 if (st->codecpar->extradata && st->codecpar->extradata_size >= 19) {
411 if (st->codecpar->extradata[18] == 0 && st->codecpar->channels <= 2) {
412 /* RTP mapping family */
413 *q++ = st->codecpar->channels;
414 } else if (st->codecpar->extradata[18] == 1 && st->codecpar->channels <= 8 &&
415 st->codecpar->extradata_size >= 21 + st->codecpar->channels) {
416 static const uint8_t coupled_stream_counts[9] = {
417 1, 0, 1, 1, 2, 2, 2, 3, 3
419 static const uint8_t channel_map_a[8][8] = {
426 {0, 4, 1, 2, 3, 5, 6},
427 {0, 6, 1, 2, 3, 4, 5, 7},
429 static const uint8_t channel_map_b[8][8] = {
436 {0, 1, 2, 3, 4, 5, 6},
437 {0, 1, 2, 3, 4, 5, 6, 7},
439 /* Vorbis mapping family */
441 if (st->codecpar->extradata[19] == st->codecpar->channels - coupled_stream_counts[st->codecpar->channels] &&
442 st->codecpar->extradata[20] == coupled_stream_counts[st->codecpar->channels] &&
443 memcmp(&st->codecpar->extradata[21], channel_map_a[st->codecpar->channels-1], st->codecpar->channels) == 0) {
444 *q++ = st->codecpar->channels;
445 } else if (st->codecpar->channels >= 2 && st->codecpar->extradata[19] == st->codecpar->channels &&
446 st->codecpar->extradata[20] == 0 &&
447 memcmp(&st->codecpar->extradata[21], channel_map_b[st->codecpar->channels-1], st->codecpar->channels) == 0) {
448 *q++ = st->codecpar->channels | 0x80;
450 /* Unsupported, could write an extended descriptor here */
451 av_log(s, AV_LOG_ERROR, "Unsupported Opus Vorbis-style channel mapping");
456 av_log(s, AV_LOG_ERROR, "Unsupported Opus channel mapping for family %d", st->codecpar->extradata[18]);
459 } else if (st->codecpar->channels <= 2) {
460 /* Assume RTP mapping family */
461 *q++ = st->codecpar->channels;
464 av_log(s, AV_LOG_ERROR, "Unsupported Opus channel mapping");
471 char *next = lang->value;
474 *q++ = 0x0a; /* ISO 639 language descriptor */
478 for (p = lang->value; next && *len_ptr < 255 / 4 * 4; p = next + 1) {
479 if (q - data > SECTION_LENGTH - 4) {
483 next = strchr(p, ',');
484 if (strlen(p) != 3 && (!next || next != p + 3))
485 continue; /* not a 3-letter code */
491 if (st->disposition & AV_DISPOSITION_CLEAN_EFFECTS)
493 else if (st->disposition & AV_DISPOSITION_HEARING_IMPAIRED)
495 else if (st->disposition & AV_DISPOSITION_VISUAL_IMPAIRED)
498 *q++ = 0; /* undefined type */
504 q -= 2; /* no language codes were written */
507 case AVMEDIA_TYPE_SUBTITLE:
509 const char default_language[] = "und";
510 const char *language = lang && strlen(lang->value) >= 3 ? lang->value : default_language;
512 if (st->codecpar->codec_id == AV_CODEC_ID_DVB_SUBTITLE) {
514 int extradata_copied = 0;
516 *q++ = 0x59; /* subtitling_descriptor */
519 while (strlen(language) >= 3) {
520 if (sizeof(data) - (q - data) < 8) { /* 8 bytes per DVB subtitle substream data */
528 if (*language != '\0')
531 if (st->codecpar->extradata_size - extradata_copied >= 5) {
532 *q++ = st->codecpar->extradata[extradata_copied + 4]; /* subtitling_type */
533 memcpy(q, st->codecpar->extradata + extradata_copied, 4); /* composition_page_id and ancillary_page_id */
534 extradata_copied += 5;
538 * 0x10 - normal with no monitor aspect ratio criticality
539 * 0x20 - for the hard of hearing with no monitor aspect ratio criticality */
540 *q++ = (st->disposition & AV_DISPOSITION_HEARING_IMPAIRED) ? 0x20 : 0x10;
541 if ((st->codecpar->extradata_size == 4) && (extradata_copied == 0)) {
542 /* support of old 4-byte extradata format */
543 memcpy(q, st->codecpar->extradata, 4); /* composition_page_id and ancillary_page_id */
544 extradata_copied += 4;
547 put16(&q, 1); /* composition_page_id */
548 put16(&q, 1); /* ancillary_page_id */
553 *len_ptr = q - len_ptr - 1;
554 } else if (st->codecpar->codec_id == AV_CODEC_ID_DVB_TELETEXT) {
555 uint8_t *len_ptr = NULL;
556 int extradata_copied = 0;
558 /* The descriptor tag. teletext_descriptor */
562 while (strlen(language) >= 3 && q - data < sizeof(data) - 6) {
567 if (*language != '\0')
570 if (st->codecpar->extradata_size - 1 > extradata_copied) {
571 memcpy(q, st->codecpar->extradata + extradata_copied, 2);
572 extradata_copied += 2;
575 /* The Teletext descriptor:
576 * teletext_type: This 5-bit field indicates the type of Teletext page indicated. (0x01 Initial Teletext page)
577 * teletext_magazine_number: This is a 3-bit field which identifies the magazine number.
578 * teletext_page_number: This is an 8-bit field giving two 4-bit hex digits identifying the page number. */
584 *len_ptr = q - len_ptr - 1;
588 case AVMEDIA_TYPE_VIDEO:
589 if (stream_type == STREAM_TYPE_VIDEO_DIRAC) {
590 *q++ = 0x05; /*MPEG-2 registration descriptor*/
596 } else if (stream_type == STREAM_TYPE_VIDEO_VC1) {
597 *q++ = 0x05; /*MPEG-2 registration descriptor*/
605 case AVMEDIA_TYPE_DATA:
606 if (st->codecpar->codec_id == AV_CODEC_ID_SMPTE_KLV) {
607 *q++ = 0x05; /* MPEG-2 registration descriptor */
613 } else if (st->codecpar->codec_id == AV_CODEC_ID_TIMED_ID3) {
614 *q++ = 0x5; /* MPEG-2 registration descriptor */
624 val = 0xf000 | (q - desc_length_ptr - 2);
625 desc_length_ptr[0] = val >> 8;
626 desc_length_ptr[1] = val;
630 av_log(s, AV_LOG_ERROR,
631 "The PMT section cannot fit stream %d and all following streams.\n"
632 "Try reducing the number of languages in the audio streams "
633 "or the total number of streams.\n", i);
635 mpegts_write_section1(&service->pmt, PMT_TID, service->sid, ts->tables_version, 0, 0,
640 /* NOTE: !str is accepted for an empty string */
641 static void putstr8(uint8_t **q_ptr, const char *str)
657 static void mpegts_write_sdt(AVFormatContext *s)
659 MpegTSWrite *ts = s->priv_data;
660 MpegTSService *service;
661 uint8_t data[SECTION_LENGTH], *q, *desc_list_len_ptr, *desc_len_ptr;
662 int i, running_status, free_ca_mode, val;
667 for (i = 0; i < ts->nb_services; i++) {
668 service = ts->services[i];
669 put16(&q, service->sid);
670 *q++ = 0xfc | 0x00; /* currently no EIT info */
671 desc_list_len_ptr = q;
673 running_status = 4; /* running */
676 /* write only one descriptor for the service name and provider */
680 *q++ = ts->service_type;
681 putstr8(&q, service->provider_name);
682 putstr8(&q, service->name);
683 desc_len_ptr[0] = q - desc_len_ptr - 1;
685 /* fill descriptor length */
686 val = (running_status << 13) | (free_ca_mode << 12) |
687 (q - desc_list_len_ptr - 2);
688 desc_list_len_ptr[0] = val >> 8;
689 desc_list_len_ptr[1] = val;
691 mpegts_write_section1(&ts->sdt, SDT_TID, ts->tsid, ts->tables_version, 0, 0,
695 static MpegTSService *mpegts_add_service(MpegTSWrite *ts, int sid,
696 const char *provider_name,
699 MpegTSService *service;
701 service = av_mallocz(sizeof(MpegTSService));
704 service->pmt.pid = ts->pmt_start_pid + ts->nb_services;
706 service->pcr_pid = 0x1fff;
707 service->provider_name = av_strdup(provider_name);
708 service->name = av_strdup(name);
709 if (!service->provider_name || !service->name)
711 if (av_dynarray_add_nofree(&ts->services, &ts->nb_services, service) < 0)
716 av_freep(&service->provider_name);
717 av_freep(&service->name);
722 static int64_t get_pcr(const MpegTSWrite *ts, AVIOContext *pb)
724 return av_rescale(avio_tell(pb) + 11, 8 * PCR_TIME_BASE, ts->mux_rate) +
728 static void mpegts_prefix_m2ts_header(AVFormatContext *s)
730 MpegTSWrite *ts = s->priv_data;
732 int64_t pcr = get_pcr(s->priv_data, s->pb);
733 uint32_t tp_extra_header = pcr % 0x3fffffff;
734 tp_extra_header = AV_RB32(&tp_extra_header);
735 avio_write(s->pb, (unsigned char *) &tp_extra_header,
736 sizeof(tp_extra_header));
740 static void section_write_packet(MpegTSSection *s, const uint8_t *packet)
742 AVFormatContext *ctx = s->opaque;
743 mpegts_prefix_m2ts_header(ctx);
744 avio_write(ctx->pb, packet, TS_PACKET_SIZE);
747 static int mpegts_init(AVFormatContext *s)
749 MpegTSWrite *ts = s->priv_data;
750 MpegTSWriteStream *ts_st;
751 MpegTSService *service;
752 AVStream *st, *pcr_st = NULL;
753 AVDictionaryEntry *title, *provider;
755 const char *service_name;
756 const char *provider_name;
760 if (s->max_delay < 0) /* Not set by the caller */
763 // round up to a whole number of TS packets
764 ts->pes_payload_size = (ts->pes_payload_size + 14 + 183) / 184 * 184 - 14;
766 ts->tsid = ts->transport_stream_id;
767 ts->onid = ts->original_network_id;
768 if (!s->nb_programs) {
769 /* allocate a single DVB service */
770 title = av_dict_get(s->metadata, "service_name", NULL, 0);
772 title = av_dict_get(s->metadata, "title", NULL, 0);
773 service_name = title ? title->value : DEFAULT_SERVICE_NAME;
774 provider = av_dict_get(s->metadata, "service_provider", NULL, 0);
775 provider_name = provider ? provider->value : DEFAULT_PROVIDER_NAME;
776 service = mpegts_add_service(ts, ts->service_id,
777 provider_name, service_name);
780 return AVERROR(ENOMEM);
782 service->pmt.write_packet = section_write_packet;
783 service->pmt.opaque = s;
784 service->pmt.cc = 15;
786 for (i = 0; i < s->nb_programs; i++) {
787 AVProgram *program = s->programs[i];
788 title = av_dict_get(program->metadata, "service_name", NULL, 0);
790 title = av_dict_get(program->metadata, "title", NULL, 0);
791 service_name = title ? title->value : DEFAULT_SERVICE_NAME;
792 provider = av_dict_get(program->metadata, "service_provider", NULL, 0);
793 provider_name = provider ? provider->value : DEFAULT_PROVIDER_NAME;
794 service = mpegts_add_service(ts, program->id,
795 provider_name, service_name);
798 return AVERROR(ENOMEM);
800 service->pmt.write_packet = section_write_packet;
801 service->pmt.opaque = s;
802 service->pmt.cc = 15;
803 service->program = program;
807 ts->pat.pid = PAT_PID;
808 /* Initialize at 15 so that it wraps and is equal to 0 for the
809 * first packet we write. */
811 ts->pat.write_packet = section_write_packet;
814 ts->sdt.pid = SDT_PID;
816 ts->sdt.write_packet = section_write_packet;
819 pids = av_malloc_array(s->nb_streams, sizeof(*pids));
821 ret = AVERROR(ENOMEM);
825 /* assign pids to each stream */
826 for (i = 0; i < s->nb_streams; i++) {
830 ts_st = av_mallocz(sizeof(MpegTSWriteStream));
832 ret = AVERROR(ENOMEM);
835 st->priv_data = ts_st;
837 ts_st->user_tb = st->time_base;
838 avpriv_set_pts_info(st, 33, 1, 90000);
840 ts_st->payload = av_mallocz(ts->pes_payload_size);
841 if (!ts_st->payload) {
842 ret = AVERROR(ENOMEM);
846 program = av_find_program_from_stream(s, NULL, i);
848 for (j = 0; j < ts->nb_services; j++) {
849 if (ts->services[j]->program == program) {
850 service = ts->services[j];
856 ts_st->service = service;
857 /* MPEG pid values < 16 are reserved. Applications which set st->id in
858 * this range are assigned a calculated pid. */
860 ts_st->pid = ts->start_pid + i;
861 } else if (st->id < 0x1FFF) {
864 av_log(s, AV_LOG_ERROR,
865 "Invalid stream id %d, must be less than 8191\n", st->id);
866 ret = AVERROR(EINVAL);
869 if (ts_st->pid == service->pmt.pid) {
870 av_log(s, AV_LOG_ERROR, "Duplicate stream id %d\n", ts_st->pid);
871 ret = AVERROR(EINVAL);
874 for (j = 0; j < i; j++) {
875 if (pids[j] == ts_st->pid) {
876 av_log(s, AV_LOG_ERROR, "Duplicate stream id %d\n", ts_st->pid);
877 ret = AVERROR(EINVAL);
881 pids[i] = ts_st->pid;
882 ts_st->payload_pts = AV_NOPTS_VALUE;
883 ts_st->payload_dts = AV_NOPTS_VALUE;
884 ts_st->first_pts_check = 1;
886 /* update PCR pid by using the first video stream */
887 if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO &&
888 service->pcr_pid == 0x1fff) {
889 service->pcr_pid = ts_st->pid;
892 if (st->codecpar->codec_id == AV_CODEC_ID_AAC &&
893 st->codecpar->extradata_size > 0) {
895 ts_st->amux = avformat_alloc_context();
897 ret = AVERROR(ENOMEM);
900 ts_st->amux->oformat =
901 av_guess_format((ts->flags & MPEGTS_FLAG_AAC_LATM) ? "latm" : "adts",
903 if (!ts_st->amux->oformat) {
904 ret = AVERROR(EINVAL);
907 if (!(ast = avformat_new_stream(ts_st->amux, NULL))) {
908 ret = AVERROR(ENOMEM);
911 ret = avcodec_parameters_copy(ast->codecpar, st->codecpar);
914 ast->time_base = st->time_base;
915 ret = avformat_write_header(ts_st->amux, NULL);
919 if (st->codecpar->codec_id == AV_CODEC_ID_OPUS) {
920 ts_st->opus_pending_trim_start = st->codecpar->initial_padding * 48000 / st->codecpar->sample_rate;
926 /* if no video stream, use the first stream as PCR */
927 if (service->pcr_pid == 0x1fff && s->nb_streams > 0) {
928 pcr_st = s->streams[0];
929 ts_st = pcr_st->priv_data;
930 service->pcr_pid = ts_st->pid;
932 ts_st = pcr_st->priv_data;
934 if (ts->mux_rate > 1) {
935 service->pcr_packet_period = (int64_t)ts->mux_rate * ts->pcr_period /
936 (TS_PACKET_SIZE * 8 * 1000);
937 ts->sdt_packet_period = (int64_t)ts->mux_rate * SDT_RETRANS_TIME /
938 (TS_PACKET_SIZE * 8 * 1000);
939 ts->pat_packet_period = (int64_t)ts->mux_rate * PAT_RETRANS_TIME /
940 (TS_PACKET_SIZE * 8 * 1000);
943 ts->first_pcr = av_rescale(s->max_delay, PCR_TIME_BASE, AV_TIME_BASE);
945 /* Arbitrary values, PAT/PMT will also be written on video key frames */
946 ts->sdt_packet_period = 200;
947 ts->pat_packet_period = 40;
948 if (pcr_st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
949 int frame_size = av_get_audio_frame_duration2(pcr_st->codecpar, 0);
951 av_log(s, AV_LOG_WARNING, "frame size not set\n");
952 service->pcr_packet_period =
953 pcr_st->codecpar->sample_rate / (10 * 512);
955 service->pcr_packet_period =
956 pcr_st->codecpar->sample_rate / (10 * frame_size);
959 // max delta PCR 0.1s
960 // TODO: should be avg_frame_rate
961 service->pcr_packet_period =
962 ts_st->user_tb.den / (10 * ts_st->user_tb.num);
964 if (!service->pcr_packet_period)
965 service->pcr_packet_period = 1;
968 ts->last_pat_ts = AV_NOPTS_VALUE;
969 ts->last_sdt_ts = AV_NOPTS_VALUE;
970 // The user specified a period, use only it
971 if (ts->pat_period < INT_MAX/2) {
972 ts->pat_packet_period = INT_MAX;
974 if (ts->sdt_period < INT_MAX/2) {
975 ts->sdt_packet_period = INT_MAX;
978 // output a PCR as soon as possible
979 service->pcr_packet_count = service->pcr_packet_period;
980 ts->pat_packet_count = ts->pat_packet_period - 1;
981 ts->sdt_packet_count = ts->sdt_packet_period - 1;
983 if (ts->mux_rate == 1)
984 av_log(s, AV_LOG_VERBOSE, "muxrate VBR, ");
986 av_log(s, AV_LOG_VERBOSE, "muxrate %d, ", ts->mux_rate);
987 av_log(s, AV_LOG_VERBOSE,
988 "pcr every %d pkts, sdt every %d, pat/pmt every %d pkts\n",
989 service->pcr_packet_period,
990 ts->sdt_packet_period, ts->pat_packet_period);
992 if (ts->m2ts_mode == -1) {
993 if (av_match_ext(s->filename, "m2ts")) {
1007 /* send SDT, PAT and PMT tables regularly */
1008 static void retransmit_si_info(AVFormatContext *s, int force_pat, int64_t dts)
1010 MpegTSWrite *ts = s->priv_data;
1013 if (++ts->sdt_packet_count == ts->sdt_packet_period ||
1014 (dts != AV_NOPTS_VALUE && ts->last_sdt_ts == AV_NOPTS_VALUE) ||
1015 (dts != AV_NOPTS_VALUE && dts - ts->last_sdt_ts >= ts->sdt_period*90000.0)
1017 ts->sdt_packet_count = 0;
1018 if (dts != AV_NOPTS_VALUE)
1019 ts->last_sdt_ts = FFMAX(dts, ts->last_sdt_ts);
1020 mpegts_write_sdt(s);
1022 if (++ts->pat_packet_count == ts->pat_packet_period ||
1023 (dts != AV_NOPTS_VALUE && ts->last_pat_ts == AV_NOPTS_VALUE) ||
1024 (dts != AV_NOPTS_VALUE && dts - ts->last_pat_ts >= ts->pat_period*90000.0) ||
1026 ts->pat_packet_count = 0;
1027 if (dts != AV_NOPTS_VALUE)
1028 ts->last_pat_ts = FFMAX(dts, ts->last_pat_ts);
1029 mpegts_write_pat(s);
1030 for (i = 0; i < ts->nb_services; i++)
1031 mpegts_write_pmt(s, ts->services[i]);
1035 static int write_pcr_bits(uint8_t *buf, int64_t pcr)
1037 int64_t pcr_low = pcr % 300, pcr_high = pcr / 300;
1039 *buf++ = pcr_high >> 25;
1040 *buf++ = pcr_high >> 17;
1041 *buf++ = pcr_high >> 9;
1042 *buf++ = pcr_high >> 1;
1043 *buf++ = pcr_high << 7 | pcr_low >> 8 | 0x7e;
1049 /* Write a single null transport stream packet */
1050 static void mpegts_insert_null_packet(AVFormatContext *s)
1053 uint8_t buf[TS_PACKET_SIZE];
1060 memset(q, 0x0FF, TS_PACKET_SIZE - (q - buf));
1061 mpegts_prefix_m2ts_header(s);
1062 avio_write(s->pb, buf, TS_PACKET_SIZE);
1065 /* Write a single transport stream packet with a PCR and no payload */
1066 static void mpegts_insert_pcr_only(AVFormatContext *s, AVStream *st)
1068 MpegTSWrite *ts = s->priv_data;
1069 MpegTSWriteStream *ts_st = st->priv_data;
1071 uint8_t buf[TS_PACKET_SIZE];
1075 *q++ = ts_st->pid >> 8;
1077 *q++ = 0x20 | ts_st->cc; /* Adaptation only */
1078 /* Continuity Count field does not increment (see 13818-1 section 2.4.3.3) */
1079 *q++ = TS_PACKET_SIZE - 5; /* Adaptation Field Length */
1080 *q++ = 0x10; /* Adaptation flags: PCR present */
1082 /* PCR coded into 6 bytes */
1083 q += write_pcr_bits(q, get_pcr(ts, s->pb));
1085 /* stuffing bytes */
1086 memset(q, 0xFF, TS_PACKET_SIZE - (q - buf));
1087 mpegts_prefix_m2ts_header(s);
1088 avio_write(s->pb, buf, TS_PACKET_SIZE);
1091 static void write_pts(uint8_t *q, int fourbits, int64_t pts)
1095 val = fourbits << 4 | (((pts >> 30) & 0x07) << 1) | 1;
1097 val = (((pts >> 15) & 0x7fff) << 1) | 1;
1100 val = (((pts) & 0x7fff) << 1) | 1;
1105 /* Set an adaptation field flag in an MPEG-TS packet*/
1106 static void set_af_flag(uint8_t *pkt, int flag)
1108 // expect at least one flag to set
1111 if ((pkt[3] & 0x20) == 0) {
1112 // no AF yet, set adaptation field flag
1114 // 1 byte length, no flags
1121 /* Extend the adaptation field by size bytes */
1122 static void extend_af(uint8_t *pkt, int size)
1124 // expect already existing adaptation field
1125 av_assert0(pkt[3] & 0x20);
1129 /* Get a pointer to MPEG-TS payload (right after TS packet header) */
1130 static uint8_t *get_ts_payload_start(uint8_t *pkt)
1133 return pkt + 5 + pkt[4];
1138 /* Add a PES header to the front of the payload, and segment into an integer
1139 * number of TS packets. The final TS packet is padded using an oversized
1140 * adaptation header to exactly fill the last TS packet.
1141 * NOTE: 'payload' contains a complete PES payload. */
1142 static void mpegts_write_pes(AVFormatContext *s, AVStream *st,
1143 const uint8_t *payload, int payload_size,
1144 int64_t pts, int64_t dts, int key, int stream_id)
1146 MpegTSWriteStream *ts_st = st->priv_data;
1147 MpegTSWrite *ts = s->priv_data;
1148 uint8_t buf[TS_PACKET_SIZE];
1150 int val, is_start, len, header_len, write_pcr, is_dvb_subtitle, is_dvb_teletext, flags;
1151 int afc_len, stuffing_len;
1152 int64_t pcr = -1; /* avoid warning */
1153 int64_t delay = av_rescale(s->max_delay, 90000, AV_TIME_BASE);
1154 int force_pat = st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO && key && !ts_st->prev_payload_key;
1156 av_assert0(ts_st->payload != buf || st->codecpar->codec_type != AVMEDIA_TYPE_VIDEO);
1157 if (ts->flags & MPEGTS_FLAG_PAT_PMT_AT_FRAMES && st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
1162 while (payload_size > 0) {
1163 retransmit_si_info(s, force_pat, dts);
1167 if (ts_st->pid == ts_st->service->pcr_pid) {
1168 if (ts->mux_rate > 1 || is_start) // VBR pcr period is based on frames
1169 ts_st->service->pcr_packet_count++;
1170 if (ts_st->service->pcr_packet_count >=
1171 ts_st->service->pcr_packet_period) {
1172 ts_st->service->pcr_packet_count = 0;
1177 if (ts->mux_rate > 1 && dts != AV_NOPTS_VALUE &&
1178 (dts - get_pcr(ts, s->pb) / 300) > delay) {
1179 /* pcr insert gets priority over null packet insert */
1181 mpegts_insert_pcr_only(s, st);
1183 mpegts_insert_null_packet(s);
1184 /* recalculate write_pcr and possibly retransmit si_info */
1188 /* prepare packet header */
1191 val = ts_st->pid >> 8;
1196 ts_st->cc = ts_st->cc + 1 & 0xf;
1197 *q++ = 0x10 | ts_st->cc; // payload indicator + CC
1198 if (key && is_start && pts != AV_NOPTS_VALUE) {
1199 // set Random Access for key frames
1200 if (ts_st->pid == ts_st->service->pcr_pid)
1202 set_af_flag(buf, 0x40);
1203 q = get_ts_payload_start(buf);
1206 set_af_flag(buf, 0x10);
1207 q = get_ts_payload_start(buf);
1208 // add 11, pcr references the last byte of program clock reference base
1209 if (ts->mux_rate > 1)
1210 pcr = get_pcr(ts, s->pb);
1212 pcr = (dts - delay) * 300;
1213 if (dts != AV_NOPTS_VALUE && dts < pcr / 300)
1214 av_log(s, AV_LOG_WARNING, "dts < pcr, TS is invalid\n");
1215 extend_af(buf, write_pcr_bits(q, pcr));
1216 q = get_ts_payload_start(buf);
1219 int pes_extension = 0;
1220 int pes_header_stuffing_bytes = 0;
1221 /* write PES header */
1225 is_dvb_subtitle = 0;
1226 is_dvb_teletext = 0;
1227 if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
1228 if (st->codecpar->codec_id == AV_CODEC_ID_DIRAC)
1232 } else if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO &&
1233 (st->codecpar->codec_id == AV_CODEC_ID_MP2 ||
1234 st->codecpar->codec_id == AV_CODEC_ID_MP3 ||
1235 st->codecpar->codec_id == AV_CODEC_ID_AAC)) {
1237 } else if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO &&
1238 st->codecpar->codec_id == AV_CODEC_ID_AC3 &&
1241 } else if (st->codecpar->codec_type == AVMEDIA_TYPE_DATA) {
1242 *q++ = stream_id != -1 ? stream_id : 0xfc;
1244 if (stream_id == 0xbd) /* asynchronous KLV */
1245 pts = dts = AV_NOPTS_VALUE;
1248 if (st->codecpar->codec_type == AVMEDIA_TYPE_SUBTITLE) {
1249 if (st->codecpar->codec_id == AV_CODEC_ID_DVB_SUBTITLE) {
1250 is_dvb_subtitle = 1;
1251 } else if (st->codecpar->codec_id == AV_CODEC_ID_DVB_TELETEXT) {
1252 is_dvb_teletext = 1;
1258 if (pts != AV_NOPTS_VALUE) {
1262 if (dts != AV_NOPTS_VALUE && pts != AV_NOPTS_VALUE && dts != pts) {
1266 if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO &&
1267 st->codecpar->codec_id == AV_CODEC_ID_DIRAC) {
1268 /* set PES_extension_flag */
1272 /* One byte for PES2 extension flag +
1273 * one byte for extension length +
1274 * one byte for extension id */
1277 /* for Blu-ray AC3 Audio the PES Extension flag should be as follow
1278 * otherwise it will not play sound on blu-ray
1280 if (ts->m2ts_mode &&
1281 st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO &&
1282 st->codecpar->codec_id == AV_CODEC_ID_AC3) {
1283 /* set PES_extension_flag */
1288 if (is_dvb_teletext) {
1289 pes_header_stuffing_bytes = 0x24 - header_len;
1292 len = payload_size + header_len + 3;
1293 /* 3 extra bytes should be added to DVB subtitle payload: 0x20 0x00 at the beginning and trailing 0xff */
1294 if (is_dvb_subtitle) {
1300 if (ts->omit_video_pes_length && st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
1306 /* data alignment indicator is required for subtitle and data streams */
1307 if (st->codecpar->codec_type == AVMEDIA_TYPE_SUBTITLE || st->codecpar->codec_type == AVMEDIA_TYPE_DATA)
1312 if (pts != AV_NOPTS_VALUE) {
1313 write_pts(q, flags >> 6, pts);
1316 if (dts != AV_NOPTS_VALUE && pts != AV_NOPTS_VALUE && dts != pts) {
1317 write_pts(q, 1, dts);
1320 if (pes_extension && st->codecpar->codec_id == AV_CODEC_ID_DIRAC) {
1321 flags = 0x01; /* set PES_extension_flag_2 */
1323 *q++ = 0x80 | 0x01; /* marker bit + extension length */
1324 /* Set the stream ID extension flag bit to 0 and
1325 * write the extended stream ID. */
1328 /* For Blu-ray AC3 Audio Setting extended flags */
1329 if (ts->m2ts_mode &&
1331 st->codecpar->codec_id == AV_CODEC_ID_AC3) {
1332 flags = 0x01; /* set PES_extension_flag_2 */
1334 *q++ = 0x80 | 0x01; /* marker bit + extension length */
1335 *q++ = 0x00 | 0x71; /* for AC3 Audio (specifically on blue-rays) */
1339 if (is_dvb_subtitle) {
1340 /* First two fields of DVB subtitles PES data:
1341 * data_identifier: for DVB subtitle streams shall be coded with the value 0x20
1342 * subtitle_stream_id: for DVB subtitle stream shall be identified by the value 0x00 */
1346 if (is_dvb_teletext) {
1347 memset(q, 0xff, pes_header_stuffing_bytes);
1348 q += pes_header_stuffing_bytes;
1353 header_len = q - buf;
1355 len = TS_PACKET_SIZE - header_len;
1356 if (len > payload_size)
1358 stuffing_len = TS_PACKET_SIZE - header_len - len;
1359 if (stuffing_len > 0) {
1360 /* add stuffing with AFC */
1361 if (buf[3] & 0x20) {
1362 /* stuffing already present: increase its size */
1363 afc_len = buf[4] + 1;
1364 memmove(buf + 4 + afc_len + stuffing_len,
1366 header_len - (4 + afc_len));
1367 buf[4] += stuffing_len;
1368 memset(buf + 4 + afc_len, 0xff, stuffing_len);
1371 memmove(buf + 4 + stuffing_len, buf + 4, header_len - 4);
1373 buf[4] = stuffing_len - 1;
1374 if (stuffing_len >= 2) {
1376 memset(buf + 6, 0xff, stuffing_len - 2);
1381 if (is_dvb_subtitle && payload_size == len) {
1382 memcpy(buf + TS_PACKET_SIZE - len, payload, len - 1);
1383 buf[TS_PACKET_SIZE - 1] = 0xff; /* end_of_PES_data_field_marker: an 8-bit field with fixed contents 0xff for DVB subtitle */
1385 memcpy(buf + TS_PACKET_SIZE - len, payload, len);
1389 payload_size -= len;
1390 mpegts_prefix_m2ts_header(s);
1391 avio_write(s->pb, buf, TS_PACKET_SIZE);
1393 ts_st->prev_payload_key = key;
1396 int ff_check_h264_startcode(AVFormatContext *s, const AVStream *st, const AVPacket *pkt)
1398 if (pkt->size < 5 || AV_RB32(pkt->data) != 0x0000001 && AV_RB24(pkt->data) != 0x000001) {
1399 if (!st->nb_frames) {
1400 av_log(s, AV_LOG_ERROR, "H.264 bitstream malformed, "
1401 "no startcode found, use the video bitstream filter 'h264_mp4toannexb' to fix it "
1402 "('-bsf:v h264_mp4toannexb' option with ffmpeg)\n");
1403 return AVERROR_INVALIDDATA;
1405 av_log(s, AV_LOG_WARNING, "H.264 bitstream error, startcode missing, size %d", pkt->size);
1406 if (pkt->size) av_log(s, AV_LOG_WARNING, " data %08X", AV_RB32(pkt->data));
1407 av_log(s, AV_LOG_WARNING, "\n");
1412 static int check_hevc_startcode(AVFormatContext *s, const AVStream *st, const AVPacket *pkt)
1414 if (pkt->size < 5 || AV_RB32(pkt->data) != 0x0000001 && AV_RB24(pkt->data) != 0x000001) {
1415 if (!st->nb_frames) {
1416 av_log(s, AV_LOG_ERROR, "HEVC bitstream malformed, no startcode found\n");
1417 return AVERROR_PATCHWELCOME;
1419 av_log(s, AV_LOG_WARNING, "HEVC bitstream error, startcode missing, size %d", pkt->size);
1420 if (pkt->size) av_log(s, AV_LOG_WARNING, " data %08X", AV_RB32(pkt->data));
1421 av_log(s, AV_LOG_WARNING, "\n");
1426 /* Based on GStreamer's gst-plugins-base/ext/ogg/gstoggstream.c
1427 * Released under the LGPL v2.1+, written by
1428 * Vincent Penquerc'h <vincent.penquerch@collabora.co.uk>
1430 static int opus_get_packet_samples(AVFormatContext *s, AVPacket *pkt)
1432 static const int durations[32] = {
1433 480, 960, 1920, 2880, /* Silk NB */
1434 480, 960, 1920, 2880, /* Silk MB */
1435 480, 960, 1920, 2880, /* Silk WB */
1436 480, 960, /* Hybrid SWB */
1437 480, 960, /* Hybrid FB */
1438 120, 240, 480, 960, /* CELT NB */
1439 120, 240, 480, 960, /* CELT NB */
1440 120, 240, 480, 960, /* CELT NB */
1441 120, 240, 480, 960, /* CELT NB */
1443 int toc, frame_duration, nframes, duration;
1450 frame_duration = durations[toc >> 3];
1464 nframes = pkt->data[1] & 63;
1468 duration = nframes * frame_duration;
1469 if (duration > 5760) {
1470 av_log(s, AV_LOG_WARNING,
1471 "Opus packet duration > 120 ms, invalid");
1478 static int mpegts_write_packet_internal(AVFormatContext *s, AVPacket *pkt)
1480 AVStream *st = s->streams[pkt->stream_index];
1481 int size = pkt->size;
1482 uint8_t *buf = pkt->data;
1483 uint8_t *data = NULL;
1484 MpegTSWrite *ts = s->priv_data;
1485 MpegTSWriteStream *ts_st = st->priv_data;
1486 const int64_t delay = av_rescale(s->max_delay, 90000, AV_TIME_BASE) * 2;
1487 int64_t dts = pkt->dts, pts = pkt->pts;
1488 int opus_samples = 0;
1490 char *side_data = NULL;
1493 side_data = av_packet_get_side_data(pkt,
1494 AV_PKT_DATA_MPEGTS_STREAM_ID,
1497 stream_id = side_data[0];
1499 if (ts->reemit_pat_pmt) {
1500 av_log(s, AV_LOG_WARNING,
1501 "resend_headers option is deprecated, use -mpegts_flags resend_headers\n");
1502 ts->reemit_pat_pmt = 0;
1503 ts->flags |= MPEGTS_FLAG_REEMIT_PAT_PMT;
1506 if (ts->flags & MPEGTS_FLAG_REEMIT_PAT_PMT) {
1507 ts->pat_packet_count = ts->pat_packet_period - 1;
1508 ts->sdt_packet_count = ts->sdt_packet_period - 1;
1509 ts->flags &= ~MPEGTS_FLAG_REEMIT_PAT_PMT;
1512 if (ts->copyts < 1) {
1513 if (pts != AV_NOPTS_VALUE)
1515 if (dts != AV_NOPTS_VALUE)
1519 if (ts_st->first_pts_check && pts == AV_NOPTS_VALUE) {
1520 av_log(s, AV_LOG_ERROR, "first pts value must be set\n");
1521 return AVERROR_INVALIDDATA;
1523 ts_st->first_pts_check = 0;
1525 if (st->codecpar->codec_id == AV_CODEC_ID_H264) {
1526 const uint8_t *p = buf, *buf_end = p + size;
1527 uint32_t state = -1;
1528 int extradd = (pkt->flags & AV_PKT_FLAG_KEY) ? st->codecpar->extradata_size : 0;
1529 int ret = ff_check_h264_startcode(s, st, pkt);
1533 if (extradd && AV_RB24(st->codecpar->extradata) > 1)
1537 p = avpriv_find_start_code(p, buf_end, &state);
1538 av_log(s, AV_LOG_TRACE, "nal %d\n", state & 0x1f);
1539 if ((state & 0x1f) == 7)
1541 } while (p < buf_end && (state & 0x1f) != 9 &&
1542 (state & 0x1f) != 5 && (state & 0x1f) != 1);
1544 if ((state & 0x1f) != 5)
1546 if ((state & 0x1f) != 9) { // AUD NAL
1547 data = av_malloc(pkt->size + 6 + extradd);
1549 return AVERROR(ENOMEM);
1550 memcpy(data + 6, st->codecpar->extradata, extradd);
1551 memcpy(data + 6 + extradd, pkt->data, pkt->size);
1552 AV_WB32(data, 0x00000001);
1554 data[5] = 0xf0; // any slice type (0xe) + rbsp stop one bit
1556 size = pkt->size + 6 + extradd;
1558 } else if (st->codecpar->codec_id == AV_CODEC_ID_AAC) {
1559 if (pkt->size < 2) {
1560 av_log(s, AV_LOG_ERROR, "AAC packet too short\n");
1561 return AVERROR_INVALIDDATA;
1563 if ((AV_RB16(pkt->data) & 0xfff0) != 0xfff0) {
1568 av_log(s, AV_LOG_ERROR, "AAC bitstream not in ADTS format "
1569 "and extradata missing\n");
1571 av_init_packet(&pkt2);
1572 pkt2.data = pkt->data;
1573 pkt2.size = pkt->size;
1574 av_assert0(pkt->dts != AV_NOPTS_VALUE);
1575 pkt2.dts = av_rescale_q(pkt->dts, st->time_base, ts_st->amux->streams[0]->time_base);
1577 ret = avio_open_dyn_buf(&ts_st->amux->pb);
1579 return AVERROR(ENOMEM);
1581 ret = av_write_frame(ts_st->amux, &pkt2);
1583 ffio_free_dyn_buf(&ts_st->amux->pb);
1586 size = avio_close_dyn_buf(ts_st->amux->pb, &data);
1587 ts_st->amux->pb = NULL;
1591 } else if (st->codecpar->codec_id == AV_CODEC_ID_HEVC) {
1592 int ret = check_hevc_startcode(s, st, pkt);
1595 } else if (st->codecpar->codec_id == AV_CODEC_ID_OPUS) {
1596 if (pkt->size < 2) {
1597 av_log(s, AV_LOG_ERROR, "Opus packet too short\n");
1598 return AVERROR_INVALIDDATA;
1601 /* Add Opus control header */
1602 if ((AV_RB16(pkt->data) >> 5) != 0x3ff) {
1606 int ctrl_header_size;
1607 int trim_start = 0, trim_end = 0;
1609 opus_samples = opus_get_packet_samples(s, pkt);
1611 side_data = av_packet_get_side_data(pkt,
1612 AV_PKT_DATA_SKIP_SAMPLES,
1615 if (side_data && side_data_size >= 10) {
1616 trim_end = AV_RL32(side_data + 4) * 48000 / st->codecpar->sample_rate;
1619 ctrl_header_size = pkt->size + 2 + pkt->size / 255 + 1;
1620 if (ts_st->opus_pending_trim_start)
1621 ctrl_header_size += 2;
1623 ctrl_header_size += 2;
1625 data = av_malloc(ctrl_header_size);
1627 return AVERROR(ENOMEM);
1631 if (ts_st->opus_pending_trim_start)
1639 data[i] = FFMIN(n, 255);
1644 av_assert0(2 + pkt->size / 255 + 1 == i);
1646 if (ts_st->opus_pending_trim_start) {
1647 trim_start = FFMIN(ts_st->opus_pending_trim_start, opus_samples);
1648 AV_WB16(data + i, trim_start);
1650 ts_st->opus_pending_trim_start -= trim_start;
1653 trim_end = FFMIN(trim_end, opus_samples - trim_start);
1654 AV_WB16(data + i, trim_end);
1658 memcpy(data + i, pkt->data, pkt->size);
1660 size = ctrl_header_size;
1662 /* TODO: Can we get TS formatted data here? If so we will
1663 * need to count the samples of that too! */
1664 av_log(s, AV_LOG_WARNING, "Got MPEG-TS formatted Opus data, unhandled");
1668 if (pkt->dts != AV_NOPTS_VALUE) {
1670 for(i=0; i<s->nb_streams; i++) {
1671 AVStream *st2 = s->streams[i];
1672 MpegTSWriteStream *ts_st2 = st2->priv_data;
1673 if ( ts_st2->payload_size
1674 && (ts_st2->payload_dts == AV_NOPTS_VALUE || dts - ts_st2->payload_dts > delay/2)) {
1675 mpegts_write_pes(s, st2, ts_st2->payload, ts_st2->payload_size,
1676 ts_st2->payload_pts, ts_st2->payload_dts,
1677 ts_st2->payload_flags & AV_PKT_FLAG_KEY, stream_id);
1678 ts_st2->payload_size = 0;
1683 if (ts_st->payload_size && (ts_st->payload_size + size > ts->pes_payload_size ||
1684 (dts != AV_NOPTS_VALUE && ts_st->payload_dts != AV_NOPTS_VALUE &&
1685 av_compare_ts(dts - ts_st->payload_dts, st->time_base,
1686 s->max_delay, AV_TIME_BASE_Q) >= 0) ||
1687 ts_st->opus_queued_samples + opus_samples >= 5760 /* 120ms */)) {
1688 mpegts_write_pes(s, st, ts_st->payload, ts_st->payload_size,
1689 ts_st->payload_pts, ts_st->payload_dts,
1690 ts_st->payload_flags & AV_PKT_FLAG_KEY, stream_id);
1691 ts_st->payload_size = 0;
1692 ts_st->opus_queued_samples = 0;
1695 if (st->codecpar->codec_type != AVMEDIA_TYPE_AUDIO || size > ts->pes_payload_size) {
1696 av_assert0(!ts_st->payload_size);
1697 // for video and subtitle, write a single pes packet
1698 mpegts_write_pes(s, st, buf, size, pts, dts,
1699 pkt->flags & AV_PKT_FLAG_KEY, stream_id);
1700 ts_st->opus_queued_samples = 0;
1705 if (!ts_st->payload_size) {
1706 ts_st->payload_pts = pts;
1707 ts_st->payload_dts = dts;
1708 ts_st->payload_flags = pkt->flags;
1711 memcpy(ts_st->payload + ts_st->payload_size, buf, size);
1712 ts_st->payload_size += size;
1713 ts_st->opus_queued_samples += opus_samples;
1720 static void mpegts_write_flush(AVFormatContext *s)
1724 /* flush current packets */
1725 for (i = 0; i < s->nb_streams; i++) {
1726 AVStream *st = s->streams[i];
1727 MpegTSWriteStream *ts_st = st->priv_data;
1728 if (ts_st->payload_size > 0) {
1729 mpegts_write_pes(s, st, ts_st->payload, ts_st->payload_size,
1730 ts_st->payload_pts, ts_st->payload_dts,
1731 ts_st->payload_flags & AV_PKT_FLAG_KEY, -1);
1732 ts_st->payload_size = 0;
1733 ts_st->opus_queued_samples = 0;
1738 static int mpegts_write_packet(AVFormatContext *s, AVPacket *pkt)
1741 mpegts_write_flush(s);
1744 return mpegts_write_packet_internal(s, pkt);
1748 static int mpegts_write_end(AVFormatContext *s)
1751 mpegts_write_flush(s);
1756 static void mpegts_deinit(AVFormatContext *s)
1758 MpegTSWrite *ts = s->priv_data;
1759 MpegTSService *service;
1762 for (i = 0; i < s->nb_streams; i++) {
1763 AVStream *st = s->streams[i];
1764 MpegTSWriteStream *ts_st = st->priv_data;
1766 av_freep(&ts_st->payload);
1768 avformat_free_context(ts_st->amux);
1774 for (i = 0; i < ts->nb_services; i++) {
1775 service = ts->services[i];
1776 av_freep(&service->provider_name);
1777 av_freep(&service->name);
1780 av_freep(&ts->services);
1783 static int mpegts_check_bitstream(struct AVFormatContext *s, const AVPacket *pkt)
1786 AVStream *st = s->streams[pkt->stream_index];
1788 if (st->codecpar->codec_id == AV_CODEC_ID_H264) {
1789 if (pkt->size >= 5 && AV_RB32(pkt->data) != 0x0000001 &&
1790 AV_RB24(pkt->data) != 0x000001)
1791 ret = ff_stream_add_bitstream_filter(st, "h264_mp4toannexb", NULL);
1792 } else if (st->codecpar->codec_id == AV_CODEC_ID_HEVC) {
1793 if (pkt->size >= 5 && AV_RB32(pkt->data) != 0x0000001 &&
1794 AV_RB24(pkt->data) != 0x000001)
1795 ret = ff_stream_add_bitstream_filter(st, "hevc_mp4toannexb", NULL);
1801 static const AVOption options[] = {
1802 { "mpegts_transport_stream_id", "Set transport_stream_id field.",
1803 offsetof(MpegTSWrite, transport_stream_id), AV_OPT_TYPE_INT,
1804 { .i64 = 0x0001 }, 0x0001, 0xffff, AV_OPT_FLAG_ENCODING_PARAM },
1805 { "mpegts_original_network_id", "Set original_network_id field.",
1806 offsetof(MpegTSWrite, original_network_id), AV_OPT_TYPE_INT,
1807 { .i64 = DVB_PRIVATE_NETWORK_START }, 0x0001, 0xffff, AV_OPT_FLAG_ENCODING_PARAM },
1808 { "mpegts_service_id", "Set service_id field.",
1809 offsetof(MpegTSWrite, service_id), AV_OPT_TYPE_INT,
1810 { .i64 = 0x0001 }, 0x0001, 0xffff, AV_OPT_FLAG_ENCODING_PARAM },
1811 { "mpegts_service_type", "Set service_type field.",
1812 offsetof(MpegTSWrite, service_type), AV_OPT_TYPE_INT,
1813 { .i64 = 0x01 }, 0x01, 0xff, AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
1814 { "digital_tv", "Digital Television.",
1815 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_DIGITAL_TV }, 0x01, 0xff,
1816 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
1817 { "digital_radio", "Digital Radio.",
1818 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_DIGITAL_RADIO }, 0x01, 0xff,
1819 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
1820 { "teletext", "Teletext.",
1821 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_TELETEXT }, 0x01, 0xff,
1822 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
1823 { "advanced_codec_digital_radio", "Advanced Codec Digital Radio.",
1824 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_ADVANCED_CODEC_DIGITAL_RADIO }, 0x01, 0xff,
1825 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
1826 { "mpeg2_digital_hdtv", "MPEG2 Digital HDTV.",
1827 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_MPEG2_DIGITAL_HDTV }, 0x01, 0xff,
1828 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
1829 { "advanced_codec_digital_sdtv", "Advanced Codec Digital SDTV.",
1830 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_ADVANCED_CODEC_DIGITAL_SDTV }, 0x01, 0xff,
1831 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
1832 { "advanced_codec_digital_hdtv", "Advanced Codec Digital HDTV.",
1833 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_ADVANCED_CODEC_DIGITAL_HDTV }, 0x01, 0xff,
1834 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
1835 { "hevc_digital_hdtv", "HEVC Digital Television Service.",
1836 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_HEVC_DIGITAL_HDTV }, 0x01, 0xff,
1837 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
1838 { "mpegts_pmt_start_pid", "Set the first pid of the PMT.",
1839 offsetof(MpegTSWrite, pmt_start_pid), AV_OPT_TYPE_INT,
1840 { .i64 = 0x1000 }, 0x0010, 0x1f00, AV_OPT_FLAG_ENCODING_PARAM },
1841 { "mpegts_start_pid", "Set the first pid.",
1842 offsetof(MpegTSWrite, start_pid), AV_OPT_TYPE_INT,
1843 { .i64 = 0x0100 }, 0x0020, 0x0f00, AV_OPT_FLAG_ENCODING_PARAM },
1844 { "mpegts_m2ts_mode", "Enable m2ts mode.",
1845 offsetof(MpegTSWrite, m2ts_mode), AV_OPT_TYPE_BOOL,
1846 { .i64 = -1 }, -1, 1, AV_OPT_FLAG_ENCODING_PARAM },
1848 offsetof(MpegTSWrite, mux_rate), AV_OPT_TYPE_INT,
1849 { .i64 = 1 }, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
1850 { "pes_payload_size", "Minimum PES packet payload in bytes",
1851 offsetof(MpegTSWrite, pes_payload_size), AV_OPT_TYPE_INT,
1852 { .i64 = DEFAULT_PES_PAYLOAD_SIZE }, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
1853 { "mpegts_flags", "MPEG-TS muxing flags",
1854 offsetof(MpegTSWrite, flags), AV_OPT_TYPE_FLAGS, { .i64 = 0 }, 0, INT_MAX,
1855 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_flags" },
1856 { "resend_headers", "Reemit PAT/PMT before writing the next packet",
1857 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_FLAG_REEMIT_PAT_PMT }, 0, INT_MAX,
1858 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_flags" },
1859 { "latm", "Use LATM packetization for AAC",
1860 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_FLAG_AAC_LATM }, 0, INT_MAX,
1861 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_flags" },
1862 { "pat_pmt_at_frames", "Reemit PAT and PMT at each video frame",
1863 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_FLAG_PAT_PMT_AT_FRAMES}, 0, INT_MAX,
1864 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_flags" },
1865 { "system_b", "Conform to System B (DVB) instead of System A (ATSC)",
1866 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_FLAG_SYSTEM_B }, 0, INT_MAX,
1867 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_flags" },
1868 // backward compatibility
1869 { "resend_headers", "Reemit PAT/PMT before writing the next packet",
1870 offsetof(MpegTSWrite, reemit_pat_pmt), AV_OPT_TYPE_INT,
1871 { .i64 = 0 }, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
1872 { "mpegts_copyts", "don't offset dts/pts",
1873 offsetof(MpegTSWrite, copyts), AV_OPT_TYPE_BOOL,
1874 { .i64 = -1 }, -1, 1, AV_OPT_FLAG_ENCODING_PARAM },
1875 { "tables_version", "set PAT, PMT and SDT version",
1876 offsetof(MpegTSWrite, tables_version), AV_OPT_TYPE_INT,
1877 { .i64 = 0 }, 0, 31, AV_OPT_FLAG_ENCODING_PARAM },
1878 { "omit_video_pes_length", "Omit the PES packet length for video packets",
1879 offsetof(MpegTSWrite, omit_video_pes_length), AV_OPT_TYPE_BOOL,
1880 { .i64 = 1 }, 0, 1, AV_OPT_FLAG_ENCODING_PARAM },
1881 { "pcr_period", "PCR retransmission time",
1882 offsetof(MpegTSWrite, pcr_period), AV_OPT_TYPE_INT,
1883 { .i64 = PCR_RETRANS_TIME }, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
1884 { "pat_period", "PAT/PMT retransmission time limit in seconds",
1885 offsetof(MpegTSWrite, pat_period), AV_OPT_TYPE_DOUBLE,
1886 { .dbl = INT_MAX }, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
1887 { "sdt_period", "SDT retransmission time limit in seconds",
1888 offsetof(MpegTSWrite, sdt_period), AV_OPT_TYPE_DOUBLE,
1889 { .dbl = INT_MAX }, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
1893 static const AVClass mpegts_muxer_class = {
1894 .class_name = "MPEGTS muxer",
1895 .item_name = av_default_item_name,
1897 .version = LIBAVUTIL_VERSION_INT,
1900 AVOutputFormat ff_mpegts_muxer = {
1902 .long_name = NULL_IF_CONFIG_SMALL("MPEG-TS (MPEG-2 Transport Stream)"),
1903 .mime_type = "video/MP2T",
1904 .extensions = "ts,m2t,m2ts,mts",
1905 .priv_data_size = sizeof(MpegTSWrite),
1906 .audio_codec = AV_CODEC_ID_MP2,
1907 .video_codec = AV_CODEC_ID_MPEG2VIDEO,
1908 .init = mpegts_init,
1909 .write_packet = mpegts_write_packet,
1910 .write_trailer = mpegts_write_end,
1911 .deinit = mpegts_deinit,
1912 .check_bitstream = mpegts_check_bitstream,
1913 .flags = AVFMT_ALLOW_FLUSH | AVFMT_VARIABLE_FPS,
1914 .priv_class = &mpegts_muxer_class,