2 * MPEG2 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 /*********************************************/
42 /* mpegts section writer */
44 typedef struct MpegTSSection {
47 void (*write_packet)(struct MpegTSSection *s, const uint8_t *packet);
51 typedef struct MpegTSService {
52 MpegTSSection pmt; /* MPEG2 pmt table context */
53 int sid; /* service ID */
58 int pcr_packet_period;
62 // service_type values as defined in ETSI 300 468
64 MPEGTS_SERVICE_TYPE_DIGITAL_TV = 0x01,
65 MPEGTS_SERVICE_TYPE_DIGITAL_RADIO = 0x02,
66 MPEGTS_SERVICE_TYPE_TELETEXT = 0x03,
67 MPEGTS_SERVICE_TYPE_ADVANCED_CODEC_DIGITAL_RADIO = 0x0A,
68 MPEGTS_SERVICE_TYPE_MPEG2_DIGITAL_HDTV = 0x11,
69 MPEGTS_SERVICE_TYPE_ADVANCED_CODEC_DIGITAL_SDTV = 0x16,
70 MPEGTS_SERVICE_TYPE_ADVANCED_CODEC_DIGITAL_HDTV = 0x19,
71 MPEGTS_SERVICE_TYPE_HEVC_DIGITAL_HDTV = 0x1F,
73 typedef struct MpegTSWrite {
74 const AVClass *av_class;
75 MpegTSSection pat; /* MPEG2 pat table */
76 MpegTSSection sdt; /* MPEG2 sdt table context */
77 MpegTSService **services;
79 int sdt_packet_period;
81 int pat_packet_period;
86 int mux_rate; ///< set to 1 when VBR
89 int transport_stream_id;
90 int original_network_id;
98 int reemit_pat_pmt; // backward compatibility
101 #define MPEGTS_FLAG_REEMIT_PAT_PMT 0x01
102 #define MPEGTS_FLAG_AAC_LATM 0x02
103 #define MPEGTS_FLAG_PAT_PMT_AT_FRAMES 0x04
104 #define MPEGTS_FLAG_SYSTEM_B 0x08
113 int omit_video_pes_length;
116 /* a PES packet header is generated every DEFAULT_PES_HEADER_FREQ packets */
117 #define DEFAULT_PES_HEADER_FREQ 16
118 #define DEFAULT_PES_PAYLOAD_SIZE ((DEFAULT_PES_HEADER_FREQ - 1) * 184 + 170)
120 /* The section length is 12 bits. The first 2 are set to 0, the remaining
121 * 10 bits should not exceed 1021. */
122 #define SECTION_LENGTH 1020
124 /* NOTE: 4 bytes must be left at the end for the crc32 */
125 static void mpegts_write_section(MpegTSSection *s, uint8_t *buf, int len)
128 unsigned char packet[TS_PACKET_SIZE];
129 const unsigned char *buf_ptr;
131 int first, b, len1, left;
133 crc = av_bswap32(av_crc(av_crc_get_table(AV_CRC_32_IEEE),
136 buf[len - 4] = (crc >> 24) & 0xff;
137 buf[len - 3] = (crc >> 16) & 0xff;
138 buf[len - 2] = (crc >> 8) & 0xff;
139 buf[len - 1] = crc & 0xff;
141 /* send each packet */
144 first = buf == buf_ptr;
152 s->cc = s->cc + 1 & 0xf;
155 *q++ = 0; /* 0 offset */
156 len1 = TS_PACKET_SIZE - (q - packet);
159 memcpy(q, buf_ptr, len1);
161 /* add known padding data */
162 left = TS_PACKET_SIZE - (q - packet);
164 memset(q, 0xff, left);
166 s->write_packet(s, packet);
173 static inline void put16(uint8_t **q_ptr, int val)
182 static int mpegts_write_section1(MpegTSSection *s, int tid, int id,
183 int version, int sec_num, int last_sec_num,
184 uint8_t *buf, int len)
186 uint8_t section[1024], *q;
187 unsigned int tot_len;
188 /* reserved_future_use field must be set to 1 for SDT */
189 unsigned int flags = tid == SDT_TID ? 0xf000 : 0xb000;
191 tot_len = 3 + 5 + len + 4;
192 /* check if not too big */
194 return AVERROR_INVALIDDATA;
198 put16(&q, flags | (len + 5 + 4)); /* 5 byte header + 4 byte CRC */
200 *q++ = 0xc1 | (version << 1); /* current_next_indicator = 1 */
205 mpegts_write_section(s, section, tot_len);
209 /*********************************************/
212 #define DEFAULT_PROVIDER_NAME "FFmpeg"
213 #define DEFAULT_SERVICE_NAME "Service01"
215 /* we retransmit the SI info at this rate */
216 #define SDT_RETRANS_TIME 500
217 #define PAT_RETRANS_TIME 100
218 #define PCR_RETRANS_TIME 20
220 typedef struct MpegTSWriteStream {
221 struct MpegTSService *service;
222 int pid; /* stream associated pid */
225 int first_pts_check; ///< first pts check needed
226 int prev_payload_key;
231 AVFormatContext *amux;
235 int opus_queued_samples;
236 int opus_pending_trim_start;
239 static void mpegts_write_pat(AVFormatContext *s)
241 MpegTSWrite *ts = s->priv_data;
242 MpegTSService *service;
243 uint8_t data[SECTION_LENGTH], *q;
247 for (i = 0; i < ts->nb_services; i++) {
248 service = ts->services[i];
249 put16(&q, service->sid);
250 put16(&q, 0xe000 | service->pmt.pid);
252 mpegts_write_section1(&ts->pat, PAT_TID, ts->tsid, ts->tables_version, 0, 0,
256 static int mpegts_write_pmt(AVFormatContext *s, MpegTSService *service)
258 MpegTSWrite *ts = s->priv_data;
259 uint8_t data[SECTION_LENGTH], *q, *desc_length_ptr, *program_info_length_ptr;
260 int val, stream_type, i, err = 0;
263 put16(&q, 0xe000 | service->pcr_pid);
265 program_info_length_ptr = q;
266 q += 2; /* patched after */
268 /* put program info here */
270 val = 0xf000 | (q - program_info_length_ptr - 2);
271 program_info_length_ptr[0] = val >> 8;
272 program_info_length_ptr[1] = val;
274 for (i = 0; i < s->nb_streams; i++) {
275 AVStream *st = s->streams[i];
276 MpegTSWriteStream *ts_st = st->priv_data;
277 AVDictionaryEntry *lang = av_dict_get(st->metadata, "language", NULL, 0);
279 if (s->nb_programs) {
281 AVProgram *program = service->program;
283 for (k = 0; k < program->nb_stream_indexes; k++)
284 if (program->stream_index[k] == i) {
293 if (q - data > SECTION_LENGTH - 32) {
297 switch (st->codecpar->codec_id) {
298 case AV_CODEC_ID_MPEG1VIDEO:
299 case AV_CODEC_ID_MPEG2VIDEO:
300 stream_type = STREAM_TYPE_VIDEO_MPEG2;
302 case AV_CODEC_ID_MPEG4:
303 stream_type = STREAM_TYPE_VIDEO_MPEG4;
305 case AV_CODEC_ID_H264:
306 stream_type = STREAM_TYPE_VIDEO_H264;
308 case AV_CODEC_ID_HEVC:
309 stream_type = STREAM_TYPE_VIDEO_HEVC;
311 case AV_CODEC_ID_CAVS:
312 stream_type = STREAM_TYPE_VIDEO_CAVS;
314 case AV_CODEC_ID_DIRAC:
315 stream_type = STREAM_TYPE_VIDEO_DIRAC;
317 case AV_CODEC_ID_VC1:
318 stream_type = STREAM_TYPE_VIDEO_VC1;
320 case AV_CODEC_ID_MP2:
321 case AV_CODEC_ID_MP3:
322 if ( st->codecpar->sample_rate > 0
323 && st->codecpar->sample_rate < 32000) {
324 stream_type = STREAM_TYPE_AUDIO_MPEG2;
326 stream_type = STREAM_TYPE_AUDIO_MPEG1;
329 case AV_CODEC_ID_AAC:
330 stream_type = (ts->flags & MPEGTS_FLAG_AAC_LATM)
331 ? STREAM_TYPE_AUDIO_AAC_LATM
332 : STREAM_TYPE_AUDIO_AAC;
334 case AV_CODEC_ID_AAC_LATM:
335 stream_type = STREAM_TYPE_AUDIO_AAC_LATM;
337 case AV_CODEC_ID_AC3:
338 stream_type = (ts->flags & MPEGTS_FLAG_SYSTEM_B)
339 ? STREAM_TYPE_PRIVATE_DATA
340 : STREAM_TYPE_AUDIO_AC3;
342 case AV_CODEC_ID_EAC3:
343 stream_type = (ts->flags & MPEGTS_FLAG_SYSTEM_B)
344 ? STREAM_TYPE_PRIVATE_DATA
345 : STREAM_TYPE_AUDIO_EAC3;
347 case AV_CODEC_ID_DTS:
348 stream_type = STREAM_TYPE_AUDIO_DTS;
350 case AV_CODEC_ID_TRUEHD:
351 stream_type = STREAM_TYPE_AUDIO_TRUEHD;
353 case AV_CODEC_ID_OPUS:
354 stream_type = STREAM_TYPE_PRIVATE_DATA;
356 case AV_CODEC_ID_TIMED_ID3:
357 stream_type = STREAM_TYPE_METADATA;
360 stream_type = STREAM_TYPE_PRIVATE_DATA;
365 put16(&q, 0xe000 | ts_st->pid);
367 q += 2; /* patched after */
369 /* write optional descriptors here */
370 switch (st->codecpar->codec_type) {
371 case AVMEDIA_TYPE_AUDIO:
372 if (st->codecpar->codec_id==AV_CODEC_ID_AC3 && (ts->flags & MPEGTS_FLAG_SYSTEM_B)) {
373 *q++=0x6a; // AC3 descriptor see A038 DVB SI
374 *q++=1; // 1 byte, all flags sets to 0
375 *q++=0; // omit all fields...
377 if (st->codecpar->codec_id==AV_CODEC_ID_EAC3 && (ts->flags & MPEGTS_FLAG_SYSTEM_B)) {
378 *q++=0x7a; // EAC3 descriptor see A038 DVB SI
379 *q++=1; // 1 byte, all flags sets to 0
380 *q++=0; // omit all fields...
382 if (st->codecpar->codec_id==AV_CODEC_ID_S302M) {
383 *q++ = 0x05; /* MPEG-2 registration descriptor*/
390 if (st->codecpar->codec_id==AV_CODEC_ID_OPUS) {
391 /* 6 bytes registration descriptor, 4 bytes Opus audio descriptor */
392 if (q - data > SECTION_LENGTH - 6 - 4) {
397 *q++ = 0x05; /* MPEG-2 registration descriptor*/
404 *q++ = 0x7f; /* DVB extension descriptor */
408 if (st->codecpar->extradata && st->codecpar->extradata_size >= 19) {
409 if (st->codecpar->extradata[18] == 0 && st->codecpar->channels <= 2) {
410 /* RTP mapping family */
411 *q++ = st->codecpar->channels;
412 } else if (st->codecpar->extradata[18] == 1 && st->codecpar->channels <= 8 &&
413 st->codecpar->extradata_size >= 21 + st->codecpar->channels) {
414 static const uint8_t coupled_stream_counts[9] = {
415 1, 0, 1, 1, 2, 2, 2, 3, 3
417 static const uint8_t channel_map_a[8][8] = {
424 {0, 4, 1, 2, 3, 5, 6},
425 {0, 6, 1, 2, 3, 4, 5, 7},
427 static const uint8_t channel_map_b[8][8] = {
434 {0, 1, 2, 3, 4, 5, 6},
435 {0, 1, 2, 3, 4, 5, 6, 7},
437 /* Vorbis mapping family */
439 if (st->codecpar->extradata[19] == st->codecpar->channels - coupled_stream_counts[st->codecpar->channels] &&
440 st->codecpar->extradata[20] == coupled_stream_counts[st->codecpar->channels] &&
441 memcmp(&st->codecpar->extradata[21], channel_map_a[st->codecpar->channels-1], st->codecpar->channels) == 0) {
442 *q++ = st->codecpar->channels;
443 } else if (st->codecpar->channels >= 2 && st->codecpar->extradata[19] == st->codecpar->channels &&
444 st->codecpar->extradata[20] == 0 &&
445 memcmp(&st->codecpar->extradata[21], channel_map_b[st->codecpar->channels-1], st->codecpar->channels) == 0) {
446 *q++ = st->codecpar->channels | 0x80;
448 /* Unsupported, could write an extended descriptor here */
449 av_log(s, AV_LOG_ERROR, "Unsupported Opus Vorbis-style channel mapping");
454 av_log(s, AV_LOG_ERROR, "Unsupported Opus channel mapping for family %d", st->codecpar->extradata[18]);
457 } else if (st->codecpar->channels <= 2) {
458 /* Assume RTP mapping family */
459 *q++ = st->codecpar->channels;
462 av_log(s, AV_LOG_ERROR, "Unsupported Opus channel mapping");
469 char *next = lang->value;
472 *q++ = 0x0a; /* ISO 639 language descriptor */
476 for (p = lang->value; next && *len_ptr < 255 / 4 * 4; p = next + 1) {
477 if (q - data > SECTION_LENGTH - 4) {
481 next = strchr(p, ',');
482 if (strlen(p) != 3 && (!next || next != p + 3))
483 continue; /* not a 3-letter code */
489 if (st->disposition & AV_DISPOSITION_CLEAN_EFFECTS)
491 else if (st->disposition & AV_DISPOSITION_HEARING_IMPAIRED)
493 else if (st->disposition & AV_DISPOSITION_VISUAL_IMPAIRED)
496 *q++ = 0; /* undefined type */
502 q -= 2; /* no language codes were written */
505 case AVMEDIA_TYPE_SUBTITLE:
507 const char default_language[] = "und";
508 const char *language = lang && strlen(lang->value) >= 3 ? lang->value : default_language;
510 if (st->codecpar->codec_id == AV_CODEC_ID_DVB_SUBTITLE) {
512 int extradata_copied = 0;
514 *q++ = 0x59; /* subtitling_descriptor */
517 while (strlen(language) >= 3) {
518 if (sizeof(data) - (q - data) < 8) { /* 8 bytes per DVB subtitle substream data */
526 if (*language != '\0')
529 if (st->codecpar->extradata_size - extradata_copied >= 5) {
530 *q++ = st->codecpar->extradata[extradata_copied + 4]; /* subtitling_type */
531 memcpy(q, st->codecpar->extradata + extradata_copied, 4); /* composition_page_id and ancillary_page_id */
532 extradata_copied += 5;
536 * 0x10 - normal with no monitor aspect ratio criticality
537 * 0x20 - for the hard of hearing with no monitor aspect ratio criticality */
538 *q++ = (st->disposition & AV_DISPOSITION_HEARING_IMPAIRED) ? 0x20 : 0x10;
539 if ((st->codecpar->extradata_size == 4) && (extradata_copied == 0)) {
540 /* support of old 4-byte extradata format */
541 memcpy(q, st->codecpar->extradata, 4); /* composition_page_id and ancillary_page_id */
542 extradata_copied += 4;
545 put16(&q, 1); /* composition_page_id */
546 put16(&q, 1); /* ancillary_page_id */
551 *len_ptr = q - len_ptr - 1;
552 } else if (st->codecpar->codec_id == AV_CODEC_ID_DVB_TELETEXT) {
553 uint8_t *len_ptr = NULL;
554 int extradata_copied = 0;
556 /* The descriptor tag. teletext_descriptor */
560 while (strlen(language) >= 3 && q - data < sizeof(data) - 6) {
565 if (*language != '\0')
568 if (st->codecpar->extradata_size - 1 > extradata_copied) {
569 memcpy(q, st->codecpar->extradata + extradata_copied, 2);
570 extradata_copied += 2;
573 /* The Teletext descriptor:
574 * teletext_type: This 5-bit field indicates the type of Teletext page indicated. (0x01 Initial Teletext page)
575 * teletext_magazine_number: This is a 3-bit field which identifies the magazine number.
576 * teletext_page_number: This is an 8-bit field giving two 4-bit hex digits identifying the page number. */
582 *len_ptr = q - len_ptr - 1;
586 case AVMEDIA_TYPE_VIDEO:
587 if (stream_type == STREAM_TYPE_VIDEO_DIRAC) {
588 *q++ = 0x05; /*MPEG-2 registration descriptor*/
594 } else if (stream_type == STREAM_TYPE_VIDEO_VC1) {
595 *q++ = 0x05; /*MPEG-2 registration descriptor*/
603 case AVMEDIA_TYPE_DATA:
604 if (st->codecpar->codec_id == AV_CODEC_ID_SMPTE_KLV) {
605 *q++ = 0x05; /* MPEG-2 registration descriptor */
611 } else if (st->codecpar->codec_id == AV_CODEC_ID_TIMED_ID3) {
612 *q++ = 0x5; /* MPEG-2 registration descriptor */
622 val = 0xf000 | (q - desc_length_ptr - 2);
623 desc_length_ptr[0] = val >> 8;
624 desc_length_ptr[1] = val;
628 av_log(s, AV_LOG_ERROR,
629 "The PMT section cannot fit stream %d and all following streams.\n"
630 "Try reducing the number of languages in the audio streams "
631 "or the total number of streams.\n", i);
633 mpegts_write_section1(&service->pmt, PMT_TID, service->sid, ts->tables_version, 0, 0,
638 /* NOTE: !str is accepted for an empty string */
639 static void putstr8(uint8_t **q_ptr, const char *str)
655 static void mpegts_write_sdt(AVFormatContext *s)
657 MpegTSWrite *ts = s->priv_data;
658 MpegTSService *service;
659 uint8_t data[SECTION_LENGTH], *q, *desc_list_len_ptr, *desc_len_ptr;
660 int i, running_status, free_ca_mode, val;
665 for (i = 0; i < ts->nb_services; i++) {
666 service = ts->services[i];
667 put16(&q, service->sid);
668 *q++ = 0xfc | 0x00; /* currently no EIT info */
669 desc_list_len_ptr = q;
671 running_status = 4; /* running */
674 /* write only one descriptor for the service name and provider */
678 *q++ = ts->service_type;
679 putstr8(&q, service->provider_name);
680 putstr8(&q, service->name);
681 desc_len_ptr[0] = q - desc_len_ptr - 1;
683 /* fill descriptor length */
684 val = (running_status << 13) | (free_ca_mode << 12) |
685 (q - desc_list_len_ptr - 2);
686 desc_list_len_ptr[0] = val >> 8;
687 desc_list_len_ptr[1] = val;
689 mpegts_write_section1(&ts->sdt, SDT_TID, ts->tsid, ts->tables_version, 0, 0,
693 static MpegTSService *mpegts_add_service(MpegTSWrite *ts, int sid,
694 const char *provider_name,
697 MpegTSService *service;
699 service = av_mallocz(sizeof(MpegTSService));
702 service->pmt.pid = ts->pmt_start_pid + ts->nb_services;
704 service->pcr_pid = 0x1fff;
705 service->provider_name = av_strdup(provider_name);
706 service->name = av_strdup(name);
707 if (!service->provider_name || !service->name)
709 if (av_dynarray_add_nofree(&ts->services, &ts->nb_services, service) < 0)
714 av_freep(&service->provider_name);
715 av_freep(&service->name);
720 static int64_t get_pcr(const MpegTSWrite *ts, AVIOContext *pb)
722 return av_rescale(avio_tell(pb) + 11, 8 * PCR_TIME_BASE, ts->mux_rate) +
726 static void mpegts_prefix_m2ts_header(AVFormatContext *s)
728 MpegTSWrite *ts = s->priv_data;
730 int64_t pcr = get_pcr(s->priv_data, s->pb);
731 uint32_t tp_extra_header = pcr % 0x3fffffff;
732 tp_extra_header = AV_RB32(&tp_extra_header);
733 avio_write(s->pb, (unsigned char *) &tp_extra_header,
734 sizeof(tp_extra_header));
738 static void section_write_packet(MpegTSSection *s, const uint8_t *packet)
740 AVFormatContext *ctx = s->opaque;
741 mpegts_prefix_m2ts_header(ctx);
742 avio_write(ctx->pb, packet, TS_PACKET_SIZE);
745 static int mpegts_init(AVFormatContext *s)
747 MpegTSWrite *ts = s->priv_data;
748 MpegTSWriteStream *ts_st;
749 MpegTSService *service;
750 AVStream *st, *pcr_st = NULL;
751 AVDictionaryEntry *title, *provider;
753 const char *service_name;
754 const char *provider_name;
758 if (s->max_delay < 0) /* Not set by the caller */
761 // round up to a whole number of TS packets
762 ts->pes_payload_size = (ts->pes_payload_size + 14 + 183) / 184 * 184 - 14;
764 ts->tsid = ts->transport_stream_id;
765 ts->onid = ts->original_network_id;
766 if (!s->nb_programs) {
767 /* allocate a single DVB service */
768 title = av_dict_get(s->metadata, "service_name", NULL, 0);
770 title = av_dict_get(s->metadata, "title", NULL, 0);
771 service_name = title ? title->value : DEFAULT_SERVICE_NAME;
772 provider = av_dict_get(s->metadata, "service_provider", NULL, 0);
773 provider_name = provider ? provider->value : DEFAULT_PROVIDER_NAME;
774 service = mpegts_add_service(ts, ts->service_id,
775 provider_name, service_name);
778 return AVERROR(ENOMEM);
780 service->pmt.write_packet = section_write_packet;
781 service->pmt.opaque = s;
782 service->pmt.cc = 15;
784 for (i = 0; i < s->nb_programs; i++) {
785 AVProgram *program = s->programs[i];
786 title = av_dict_get(program->metadata, "service_name", NULL, 0);
788 title = av_dict_get(program->metadata, "title", NULL, 0);
789 service_name = title ? title->value : DEFAULT_SERVICE_NAME;
790 provider = av_dict_get(program->metadata, "service_provider", NULL, 0);
791 provider_name = provider ? provider->value : DEFAULT_PROVIDER_NAME;
792 service = mpegts_add_service(ts, program->id,
793 provider_name, service_name);
796 return AVERROR(ENOMEM);
798 service->pmt.write_packet = section_write_packet;
799 service->pmt.opaque = s;
800 service->pmt.cc = 15;
801 service->program = program;
805 ts->pat.pid = PAT_PID;
806 /* Initialize at 15 so that it wraps and is equal to 0 for the
807 * first packet we write. */
809 ts->pat.write_packet = section_write_packet;
812 ts->sdt.pid = SDT_PID;
814 ts->sdt.write_packet = section_write_packet;
817 pids = av_malloc_array(s->nb_streams, sizeof(*pids));
819 ret = AVERROR(ENOMEM);
823 /* assign pids to each stream */
824 for (i = 0; i < s->nb_streams; i++) {
828 ts_st = av_mallocz(sizeof(MpegTSWriteStream));
830 ret = AVERROR(ENOMEM);
833 st->priv_data = ts_st;
835 ts_st->user_tb = st->time_base;
836 avpriv_set_pts_info(st, 33, 1, 90000);
838 ts_st->payload = av_mallocz(ts->pes_payload_size);
839 if (!ts_st->payload) {
840 ret = AVERROR(ENOMEM);
844 program = av_find_program_from_stream(s, NULL, i);
846 for (j = 0; j < ts->nb_services; j++) {
847 if (ts->services[j]->program == program) {
848 service = ts->services[j];
854 ts_st->service = service;
855 /* MPEG pid values < 16 are reserved. Applications which set st->id in
856 * this range are assigned a calculated pid. */
858 ts_st->pid = ts->start_pid + i;
859 } else if (st->id < 0x1FFF) {
862 av_log(s, AV_LOG_ERROR,
863 "Invalid stream id %d, must be less than 8191\n", st->id);
864 ret = AVERROR(EINVAL);
867 if (ts_st->pid == service->pmt.pid) {
868 av_log(s, AV_LOG_ERROR, "Duplicate stream id %d\n", ts_st->pid);
869 ret = AVERROR(EINVAL);
872 for (j = 0; j < i; j++) {
873 if (pids[j] == ts_st->pid) {
874 av_log(s, AV_LOG_ERROR, "Duplicate stream id %d\n", ts_st->pid);
875 ret = AVERROR(EINVAL);
879 pids[i] = ts_st->pid;
880 ts_st->payload_pts = AV_NOPTS_VALUE;
881 ts_st->payload_dts = AV_NOPTS_VALUE;
882 ts_st->first_pts_check = 1;
884 /* update PCR pid by using the first video stream */
885 if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO &&
886 service->pcr_pid == 0x1fff) {
887 service->pcr_pid = ts_st->pid;
890 if (st->codecpar->codec_id == AV_CODEC_ID_AAC &&
891 st->codecpar->extradata_size > 0) {
893 ts_st->amux = avformat_alloc_context();
895 ret = AVERROR(ENOMEM);
898 ts_st->amux->oformat =
899 av_guess_format((ts->flags & MPEGTS_FLAG_AAC_LATM) ? "latm" : "adts",
901 if (!ts_st->amux->oformat) {
902 ret = AVERROR(EINVAL);
905 if (!(ast = avformat_new_stream(ts_st->amux, NULL))) {
906 ret = AVERROR(ENOMEM);
909 ret = avcodec_parameters_copy(ast->codecpar, st->codecpar);
912 ast->time_base = st->time_base;
913 ret = avformat_write_header(ts_st->amux, NULL);
917 if (st->codecpar->codec_id == AV_CODEC_ID_OPUS) {
918 ts_st->opus_pending_trim_start = st->codecpar->initial_padding * 48000 / st->codecpar->sample_rate;
924 /* if no video stream, use the first stream as PCR */
925 if (service->pcr_pid == 0x1fff && s->nb_streams > 0) {
926 pcr_st = s->streams[0];
927 ts_st = pcr_st->priv_data;
928 service->pcr_pid = ts_st->pid;
930 ts_st = pcr_st->priv_data;
932 if (ts->mux_rate > 1) {
933 service->pcr_packet_period = (int64_t)ts->mux_rate * ts->pcr_period /
934 (TS_PACKET_SIZE * 8 * 1000);
935 ts->sdt_packet_period = (int64_t)ts->mux_rate * SDT_RETRANS_TIME /
936 (TS_PACKET_SIZE * 8 * 1000);
937 ts->pat_packet_period = (int64_t)ts->mux_rate * PAT_RETRANS_TIME /
938 (TS_PACKET_SIZE * 8 * 1000);
941 ts->first_pcr = av_rescale(s->max_delay, PCR_TIME_BASE, AV_TIME_BASE);
943 /* Arbitrary values, PAT/PMT will also be written on video key frames */
944 ts->sdt_packet_period = 200;
945 ts->pat_packet_period = 40;
946 if (pcr_st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
947 int frame_size = av_get_audio_frame_duration2(pcr_st->codecpar, 0);
949 av_log(s, AV_LOG_WARNING, "frame size not set\n");
950 service->pcr_packet_period =
951 pcr_st->codecpar->sample_rate / (10 * 512);
953 service->pcr_packet_period =
954 pcr_st->codecpar->sample_rate / (10 * frame_size);
957 // max delta PCR 0.1s
958 // TODO: should be avg_frame_rate
959 service->pcr_packet_period =
960 ts_st->user_tb.den / (10 * ts_st->user_tb.num);
962 if (!service->pcr_packet_period)
963 service->pcr_packet_period = 1;
966 ts->last_pat_ts = AV_NOPTS_VALUE;
967 ts->last_sdt_ts = AV_NOPTS_VALUE;
968 // The user specified a period, use only it
969 if (ts->pat_period < INT_MAX/2) {
970 ts->pat_packet_period = INT_MAX;
972 if (ts->sdt_period < INT_MAX/2) {
973 ts->sdt_packet_period = INT_MAX;
976 // output a PCR as soon as possible
977 service->pcr_packet_count = service->pcr_packet_period;
978 ts->pat_packet_count = ts->pat_packet_period - 1;
979 ts->sdt_packet_count = ts->sdt_packet_period - 1;
981 if (ts->mux_rate == 1)
982 av_log(s, AV_LOG_VERBOSE, "muxrate VBR, ");
984 av_log(s, AV_LOG_VERBOSE, "muxrate %d, ", ts->mux_rate);
985 av_log(s, AV_LOG_VERBOSE,
986 "pcr every %d pkts, sdt every %d, pat/pmt every %d pkts\n",
987 service->pcr_packet_period,
988 ts->sdt_packet_period, ts->pat_packet_period);
990 if (ts->m2ts_mode == -1) {
991 if (av_match_ext(s->filename, "m2ts")) {
1005 /* send SDT, PAT and PMT tables regulary */
1006 static void retransmit_si_info(AVFormatContext *s, int force_pat, int64_t dts)
1008 MpegTSWrite *ts = s->priv_data;
1011 if (++ts->sdt_packet_count == ts->sdt_packet_period ||
1012 (dts != AV_NOPTS_VALUE && ts->last_sdt_ts == AV_NOPTS_VALUE) ||
1013 (dts != AV_NOPTS_VALUE && dts - ts->last_sdt_ts >= ts->sdt_period*90000.0)
1015 ts->sdt_packet_count = 0;
1016 if (dts != AV_NOPTS_VALUE)
1017 ts->last_sdt_ts = FFMAX(dts, ts->last_sdt_ts);
1018 mpegts_write_sdt(s);
1020 if (++ts->pat_packet_count == ts->pat_packet_period ||
1021 (dts != AV_NOPTS_VALUE && ts->last_pat_ts == AV_NOPTS_VALUE) ||
1022 (dts != AV_NOPTS_VALUE && dts - ts->last_pat_ts >= ts->pat_period*90000.0) ||
1024 ts->pat_packet_count = 0;
1025 if (dts != AV_NOPTS_VALUE)
1026 ts->last_pat_ts = FFMAX(dts, ts->last_pat_ts);
1027 mpegts_write_pat(s);
1028 for (i = 0; i < ts->nb_services; i++)
1029 mpegts_write_pmt(s, ts->services[i]);
1033 static int write_pcr_bits(uint8_t *buf, int64_t pcr)
1035 int64_t pcr_low = pcr % 300, pcr_high = pcr / 300;
1037 *buf++ = pcr_high >> 25;
1038 *buf++ = pcr_high >> 17;
1039 *buf++ = pcr_high >> 9;
1040 *buf++ = pcr_high >> 1;
1041 *buf++ = pcr_high << 7 | pcr_low >> 8 | 0x7e;
1047 /* Write a single null transport stream packet */
1048 static void mpegts_insert_null_packet(AVFormatContext *s)
1051 uint8_t buf[TS_PACKET_SIZE];
1058 memset(q, 0x0FF, TS_PACKET_SIZE - (q - buf));
1059 mpegts_prefix_m2ts_header(s);
1060 avio_write(s->pb, buf, TS_PACKET_SIZE);
1063 /* Write a single transport stream packet with a PCR and no payload */
1064 static void mpegts_insert_pcr_only(AVFormatContext *s, AVStream *st)
1066 MpegTSWrite *ts = s->priv_data;
1067 MpegTSWriteStream *ts_st = st->priv_data;
1069 uint8_t buf[TS_PACKET_SIZE];
1073 *q++ = ts_st->pid >> 8;
1075 *q++ = 0x20 | ts_st->cc; /* Adaptation only */
1076 /* Continuity Count field does not increment (see 13818-1 section 2.4.3.3) */
1077 *q++ = TS_PACKET_SIZE - 5; /* Adaptation Field Length */
1078 *q++ = 0x10; /* Adaptation flags: PCR present */
1080 /* PCR coded into 6 bytes */
1081 q += write_pcr_bits(q, get_pcr(ts, s->pb));
1083 /* stuffing bytes */
1084 memset(q, 0xFF, TS_PACKET_SIZE - (q - buf));
1085 mpegts_prefix_m2ts_header(s);
1086 avio_write(s->pb, buf, TS_PACKET_SIZE);
1089 static void write_pts(uint8_t *q, int fourbits, int64_t pts)
1093 val = fourbits << 4 | (((pts >> 30) & 0x07) << 1) | 1;
1095 val = (((pts >> 15) & 0x7fff) << 1) | 1;
1098 val = (((pts) & 0x7fff) << 1) | 1;
1103 /* Set an adaptation field flag in an MPEG-TS packet*/
1104 static void set_af_flag(uint8_t *pkt, int flag)
1106 // expect at least one flag to set
1109 if ((pkt[3] & 0x20) == 0) {
1110 // no AF yet, set adaptation field flag
1112 // 1 byte length, no flags
1119 /* Extend the adaptation field by size bytes */
1120 static void extend_af(uint8_t *pkt, int size)
1122 // expect already existing adaptation field
1123 av_assert0(pkt[3] & 0x20);
1127 /* Get a pointer to MPEG-TS payload (right after TS packet header) */
1128 static uint8_t *get_ts_payload_start(uint8_t *pkt)
1131 return pkt + 5 + pkt[4];
1136 /* Add a PES header to the front of the payload, and segment into an integer
1137 * number of TS packets. The final TS packet is padded using an oversized
1138 * adaptation header to exactly fill the last TS packet.
1139 * NOTE: 'payload' contains a complete PES payload. */
1140 static void mpegts_write_pes(AVFormatContext *s, AVStream *st,
1141 const uint8_t *payload, int payload_size,
1142 int64_t pts, int64_t dts, int key, int stream_id)
1144 MpegTSWriteStream *ts_st = st->priv_data;
1145 MpegTSWrite *ts = s->priv_data;
1146 uint8_t buf[TS_PACKET_SIZE];
1148 int val, is_start, len, header_len, write_pcr, is_dvb_subtitle, is_dvb_teletext, flags;
1149 int afc_len, stuffing_len;
1150 int64_t pcr = -1; /* avoid warning */
1151 int64_t delay = av_rescale(s->max_delay, 90000, AV_TIME_BASE);
1152 int force_pat = st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO && key && !ts_st->prev_payload_key;
1154 av_assert0(ts_st->payload != buf || st->codecpar->codec_type != AVMEDIA_TYPE_VIDEO);
1155 if (ts->flags & MPEGTS_FLAG_PAT_PMT_AT_FRAMES && st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
1160 while (payload_size > 0) {
1161 retransmit_si_info(s, force_pat, dts);
1165 if (ts_st->pid == ts_st->service->pcr_pid) {
1166 if (ts->mux_rate > 1 || is_start) // VBR pcr period is based on frames
1167 ts_st->service->pcr_packet_count++;
1168 if (ts_st->service->pcr_packet_count >=
1169 ts_st->service->pcr_packet_period) {
1170 ts_st->service->pcr_packet_count = 0;
1175 if (ts->mux_rate > 1 && dts != AV_NOPTS_VALUE &&
1176 (dts - get_pcr(ts, s->pb) / 300) > delay) {
1177 /* pcr insert gets priority over null packet insert */
1179 mpegts_insert_pcr_only(s, st);
1181 mpegts_insert_null_packet(s);
1182 /* recalculate write_pcr and possibly retransmit si_info */
1186 /* prepare packet header */
1189 val = ts_st->pid >> 8;
1194 ts_st->cc = ts_st->cc + 1 & 0xf;
1195 *q++ = 0x10 | ts_st->cc; // payload indicator + CC
1196 if (key && is_start && pts != AV_NOPTS_VALUE) {
1197 // set Random Access for key frames
1198 if (ts_st->pid == ts_st->service->pcr_pid)
1200 set_af_flag(buf, 0x40);
1201 q = get_ts_payload_start(buf);
1204 set_af_flag(buf, 0x10);
1205 q = get_ts_payload_start(buf);
1206 // add 11, pcr references the last byte of program clock reference base
1207 if (ts->mux_rate > 1)
1208 pcr = get_pcr(ts, s->pb);
1210 pcr = (dts - delay) * 300;
1211 if (dts != AV_NOPTS_VALUE && dts < pcr / 300)
1212 av_log(s, AV_LOG_WARNING, "dts < pcr, TS is invalid\n");
1213 extend_af(buf, write_pcr_bits(q, pcr));
1214 q = get_ts_payload_start(buf);
1217 int pes_extension = 0;
1218 int pes_header_stuffing_bytes = 0;
1219 /* write PES header */
1223 is_dvb_subtitle = 0;
1224 is_dvb_teletext = 0;
1225 if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
1226 if (st->codecpar->codec_id == AV_CODEC_ID_DIRAC)
1230 } else if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO &&
1231 (st->codecpar->codec_id == AV_CODEC_ID_MP2 ||
1232 st->codecpar->codec_id == AV_CODEC_ID_MP3 ||
1233 st->codecpar->codec_id == AV_CODEC_ID_AAC)) {
1235 } else if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO &&
1236 st->codecpar->codec_id == AV_CODEC_ID_AC3 &&
1239 } else if (st->codecpar->codec_type == AVMEDIA_TYPE_DATA) {
1240 *q++ = stream_id != -1 ? stream_id : 0xfc;
1242 if (stream_id == 0xbd) /* asynchronous KLV */
1243 pts = dts = AV_NOPTS_VALUE;
1246 if (st->codecpar->codec_type == AVMEDIA_TYPE_SUBTITLE) {
1247 if (st->codecpar->codec_id == AV_CODEC_ID_DVB_SUBTITLE) {
1248 is_dvb_subtitle = 1;
1249 } else if (st->codecpar->codec_id == AV_CODEC_ID_DVB_TELETEXT) {
1250 is_dvb_teletext = 1;
1256 if (pts != AV_NOPTS_VALUE) {
1260 if (dts != AV_NOPTS_VALUE && pts != AV_NOPTS_VALUE && dts != pts) {
1264 if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO &&
1265 st->codecpar->codec_id == AV_CODEC_ID_DIRAC) {
1266 /* set PES_extension_flag */
1270 /* One byte for PES2 extension flag +
1271 * one byte for extension length +
1272 * one byte for extension id */
1275 /* for Blu-ray AC3 Audio the PES Extension flag should be as follow
1276 * otherwise it will not play sound on blu-ray
1278 if (ts->m2ts_mode &&
1279 st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO &&
1280 st->codecpar->codec_id == AV_CODEC_ID_AC3) {
1281 /* set PES_extension_flag */
1286 if (is_dvb_teletext) {
1287 pes_header_stuffing_bytes = 0x24 - header_len;
1290 len = payload_size + header_len + 3;
1291 /* 3 extra bytes should be added to DVB subtitle payload: 0x20 0x00 at the beginning and trailing 0xff */
1292 if (is_dvb_subtitle) {
1298 if (ts->omit_video_pes_length && st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
1304 /* data alignment indicator is required for subtitle and data streams */
1305 if (st->codecpar->codec_type == AVMEDIA_TYPE_SUBTITLE || st->codecpar->codec_type == AVMEDIA_TYPE_DATA)
1310 if (pts != AV_NOPTS_VALUE) {
1311 write_pts(q, flags >> 6, pts);
1314 if (dts != AV_NOPTS_VALUE && pts != AV_NOPTS_VALUE && dts != pts) {
1315 write_pts(q, 1, dts);
1318 if (pes_extension && st->codecpar->codec_id == AV_CODEC_ID_DIRAC) {
1319 flags = 0x01; /* set PES_extension_flag_2 */
1321 *q++ = 0x80 | 0x01; /* marker bit + extension length */
1322 /* Set the stream ID extension flag bit to 0 and
1323 * write the extended stream ID. */
1326 /* For Blu-ray AC3 Audio Setting extended flags */
1327 if (ts->m2ts_mode &&
1329 st->codecpar->codec_id == AV_CODEC_ID_AC3) {
1330 flags = 0x01; /* set PES_extension_flag_2 */
1332 *q++ = 0x80 | 0x01; /* marker bit + extension length */
1333 *q++ = 0x00 | 0x71; /* for AC3 Audio (specifically on blue-rays) */
1337 if (is_dvb_subtitle) {
1338 /* First two fields of DVB subtitles PES data:
1339 * data_identifier: for DVB subtitle streams shall be coded with the value 0x20
1340 * subtitle_stream_id: for DVB subtitle stream shall be identified by the value 0x00 */
1344 if (is_dvb_teletext) {
1345 memset(q, 0xff, pes_header_stuffing_bytes);
1346 q += pes_header_stuffing_bytes;
1351 header_len = q - buf;
1353 len = TS_PACKET_SIZE - header_len;
1354 if (len > payload_size)
1356 stuffing_len = TS_PACKET_SIZE - header_len - len;
1357 if (stuffing_len > 0) {
1358 /* add stuffing with AFC */
1359 if (buf[3] & 0x20) {
1360 /* stuffing already present: increase its size */
1361 afc_len = buf[4] + 1;
1362 memmove(buf + 4 + afc_len + stuffing_len,
1364 header_len - (4 + afc_len));
1365 buf[4] += stuffing_len;
1366 memset(buf + 4 + afc_len, 0xff, stuffing_len);
1369 memmove(buf + 4 + stuffing_len, buf + 4, header_len - 4);
1371 buf[4] = stuffing_len - 1;
1372 if (stuffing_len >= 2) {
1374 memset(buf + 6, 0xff, stuffing_len - 2);
1379 if (is_dvb_subtitle && payload_size == len) {
1380 memcpy(buf + TS_PACKET_SIZE - len, payload, len - 1);
1381 buf[TS_PACKET_SIZE - 1] = 0xff; /* end_of_PES_data_field_marker: an 8-bit field with fixed contents 0xff for DVB subtitle */
1383 memcpy(buf + TS_PACKET_SIZE - len, payload, len);
1387 payload_size -= len;
1388 mpegts_prefix_m2ts_header(s);
1389 avio_write(s->pb, buf, TS_PACKET_SIZE);
1391 ts_st->prev_payload_key = key;
1394 int ff_check_h264_startcode(AVFormatContext *s, const AVStream *st, const AVPacket *pkt)
1396 if (pkt->size < 5 || AV_RB32(pkt->data) != 0x0000001 && AV_RB24(pkt->data) != 0x000001) {
1397 if (!st->nb_frames) {
1398 av_log(s, AV_LOG_ERROR, "H.264 bitstream malformed, "
1399 "no startcode found, use the video bitstream filter 'h264_mp4toannexb' to fix it "
1400 "('-bsf:v h264_mp4toannexb' option with ffmpeg)\n");
1401 return AVERROR_INVALIDDATA;
1403 av_log(s, AV_LOG_WARNING, "H.264 bitstream error, startcode missing, size %d", pkt->size);
1404 if (pkt->size) av_log(s, AV_LOG_WARNING, " data %08X", AV_RB32(pkt->data));
1405 av_log(s, AV_LOG_WARNING, "\n");
1410 static int check_hevc_startcode(AVFormatContext *s, const AVStream *st, const AVPacket *pkt)
1412 if (pkt->size < 5 || AV_RB32(pkt->data) != 0x0000001 && AV_RB24(pkt->data) != 0x000001) {
1413 if (!st->nb_frames) {
1414 av_log(s, AV_LOG_ERROR, "HEVC bitstream malformed, no startcode found\n");
1415 return AVERROR_PATCHWELCOME;
1417 av_log(s, AV_LOG_WARNING, "HEVC bitstream error, startcode missing, size %d", pkt->size);
1418 if (pkt->size) av_log(s, AV_LOG_WARNING, " data %08X", AV_RB32(pkt->data));
1419 av_log(s, AV_LOG_WARNING, "\n");
1424 /* Based on GStreamer's gst-plugins-base/ext/ogg/gstoggstream.c
1425 * Released under the LGPL v2.1+, written by
1426 * Vincent Penquerc'h <vincent.penquerch@collabora.co.uk>
1428 static int opus_get_packet_samples(AVFormatContext *s, AVPacket *pkt)
1430 static const int durations[32] = {
1431 480, 960, 1920, 2880, /* Silk NB */
1432 480, 960, 1920, 2880, /* Silk MB */
1433 480, 960, 1920, 2880, /* Silk WB */
1434 480, 960, /* Hybrid SWB */
1435 480, 960, /* Hybrid FB */
1436 120, 240, 480, 960, /* CELT NB */
1437 120, 240, 480, 960, /* CELT NB */
1438 120, 240, 480, 960, /* CELT NB */
1439 120, 240, 480, 960, /* CELT NB */
1441 int toc, frame_duration, nframes, duration;
1448 frame_duration = durations[toc >> 3];
1462 nframes = pkt->data[1] & 63;
1466 duration = nframes * frame_duration;
1467 if (duration > 5760) {
1468 av_log(s, AV_LOG_WARNING,
1469 "Opus packet duration > 120 ms, invalid");
1476 static int mpegts_write_packet_internal(AVFormatContext *s, AVPacket *pkt)
1478 AVStream *st = s->streams[pkt->stream_index];
1479 int size = pkt->size;
1480 uint8_t *buf = pkt->data;
1481 uint8_t *data = NULL;
1482 MpegTSWrite *ts = s->priv_data;
1483 MpegTSWriteStream *ts_st = st->priv_data;
1484 const int64_t delay = av_rescale(s->max_delay, 90000, AV_TIME_BASE) * 2;
1485 int64_t dts = pkt->dts, pts = pkt->pts;
1486 int opus_samples = 0;
1488 char *side_data = NULL;
1491 side_data = av_packet_get_side_data(pkt,
1492 AV_PKT_DATA_MPEGTS_STREAM_ID,
1495 stream_id = side_data[0];
1497 if (ts->reemit_pat_pmt) {
1498 av_log(s, AV_LOG_WARNING,
1499 "resend_headers option is deprecated, use -mpegts_flags resend_headers\n");
1500 ts->reemit_pat_pmt = 0;
1501 ts->flags |= MPEGTS_FLAG_REEMIT_PAT_PMT;
1504 if (ts->flags & MPEGTS_FLAG_REEMIT_PAT_PMT) {
1505 ts->pat_packet_count = ts->pat_packet_period - 1;
1506 ts->sdt_packet_count = ts->sdt_packet_period - 1;
1507 ts->flags &= ~MPEGTS_FLAG_REEMIT_PAT_PMT;
1510 if (ts->copyts < 1) {
1511 if (pts != AV_NOPTS_VALUE)
1513 if (dts != AV_NOPTS_VALUE)
1517 if (ts_st->first_pts_check && pts == AV_NOPTS_VALUE) {
1518 av_log(s, AV_LOG_ERROR, "first pts value must be set\n");
1519 return AVERROR_INVALIDDATA;
1521 ts_st->first_pts_check = 0;
1523 if (st->codecpar->codec_id == AV_CODEC_ID_H264) {
1524 const uint8_t *p = buf, *buf_end = p + size;
1525 uint32_t state = -1;
1526 int extradd = (pkt->flags & AV_PKT_FLAG_KEY) ? st->codecpar->extradata_size : 0;
1527 int ret = ff_check_h264_startcode(s, st, pkt);
1531 if (extradd && AV_RB24(st->codecpar->extradata) > 1)
1535 p = avpriv_find_start_code(p, buf_end, &state);
1536 av_log(s, AV_LOG_TRACE, "nal %d\n", state & 0x1f);
1537 if ((state & 0x1f) == 7)
1539 } while (p < buf_end && (state & 0x1f) != 9 &&
1540 (state & 0x1f) != 5 && (state & 0x1f) != 1);
1542 if ((state & 0x1f) != 5)
1544 if ((state & 0x1f) != 9) { // AUD NAL
1545 data = av_malloc(pkt->size + 6 + extradd);
1547 return AVERROR(ENOMEM);
1548 memcpy(data + 6, st->codecpar->extradata, extradd);
1549 memcpy(data + 6 + extradd, pkt->data, pkt->size);
1550 AV_WB32(data, 0x00000001);
1552 data[5] = 0xf0; // any slice type (0xe) + rbsp stop one bit
1554 size = pkt->size + 6 + extradd;
1556 } else if (st->codecpar->codec_id == AV_CODEC_ID_AAC) {
1557 if (pkt->size < 2) {
1558 av_log(s, AV_LOG_ERROR, "AAC packet too short\n");
1559 return AVERROR_INVALIDDATA;
1561 if ((AV_RB16(pkt->data) & 0xfff0) != 0xfff0) {
1566 av_log(s, AV_LOG_ERROR, "AAC bitstream not in ADTS format "
1567 "and extradata missing\n");
1569 av_init_packet(&pkt2);
1570 pkt2.data = pkt->data;
1571 pkt2.size = pkt->size;
1572 av_assert0(pkt->dts != AV_NOPTS_VALUE);
1573 pkt2.dts = av_rescale_q(pkt->dts, st->time_base, ts_st->amux->streams[0]->time_base);
1575 ret = avio_open_dyn_buf(&ts_st->amux->pb);
1577 return AVERROR(ENOMEM);
1579 ret = av_write_frame(ts_st->amux, &pkt2);
1581 ffio_free_dyn_buf(&ts_st->amux->pb);
1584 size = avio_close_dyn_buf(ts_st->amux->pb, &data);
1585 ts_st->amux->pb = NULL;
1589 } else if (st->codecpar->codec_id == AV_CODEC_ID_HEVC) {
1590 int ret = check_hevc_startcode(s, st, pkt);
1593 } else if (st->codecpar->codec_id == AV_CODEC_ID_OPUS) {
1594 if (pkt->size < 2) {
1595 av_log(s, AV_LOG_ERROR, "Opus packet too short\n");
1596 return AVERROR_INVALIDDATA;
1599 /* Add Opus control header */
1600 if ((AV_RB16(pkt->data) >> 5) != 0x3ff) {
1604 int ctrl_header_size;
1605 int trim_start = 0, trim_end = 0;
1607 opus_samples = opus_get_packet_samples(s, pkt);
1609 side_data = av_packet_get_side_data(pkt,
1610 AV_PKT_DATA_SKIP_SAMPLES,
1613 if (side_data && side_data_size >= 10) {
1614 trim_end = AV_RL32(side_data + 4) * 48000 / st->codecpar->sample_rate;
1617 ctrl_header_size = pkt->size + 2 + pkt->size / 255 + 1;
1618 if (ts_st->opus_pending_trim_start)
1619 ctrl_header_size += 2;
1621 ctrl_header_size += 2;
1623 data = av_malloc(ctrl_header_size);
1625 return AVERROR(ENOMEM);
1629 if (ts_st->opus_pending_trim_start)
1637 data[i] = FFMIN(n, 255);
1642 av_assert0(2 + pkt->size / 255 + 1 == i);
1644 if (ts_st->opus_pending_trim_start) {
1645 trim_start = FFMIN(ts_st->opus_pending_trim_start, opus_samples);
1646 AV_WB16(data + i, trim_start);
1648 ts_st->opus_pending_trim_start -= trim_start;
1651 trim_end = FFMIN(trim_end, opus_samples - trim_start);
1652 AV_WB16(data + i, trim_end);
1656 memcpy(data + i, pkt->data, pkt->size);
1658 size = ctrl_header_size;
1660 /* TODO: Can we get TS formatted data here? If so we will
1661 * need to count the samples of that too! */
1662 av_log(s, AV_LOG_WARNING, "Got MPEG-TS formatted Opus data, unhandled");
1666 if (pkt->dts != AV_NOPTS_VALUE) {
1668 for(i=0; i<s->nb_streams; i++) {
1669 AVStream *st2 = s->streams[i];
1670 MpegTSWriteStream *ts_st2 = st2->priv_data;
1671 if ( ts_st2->payload_size
1672 && (ts_st2->payload_dts == AV_NOPTS_VALUE || dts - ts_st2->payload_dts > delay/2)) {
1673 mpegts_write_pes(s, st2, ts_st2->payload, ts_st2->payload_size,
1674 ts_st2->payload_pts, ts_st2->payload_dts,
1675 ts_st2->payload_flags & AV_PKT_FLAG_KEY, stream_id);
1676 ts_st2->payload_size = 0;
1681 if (ts_st->payload_size && (ts_st->payload_size + size > ts->pes_payload_size ||
1682 (dts != AV_NOPTS_VALUE && ts_st->payload_dts != AV_NOPTS_VALUE &&
1683 av_compare_ts(dts - ts_st->payload_dts, st->time_base,
1684 s->max_delay, AV_TIME_BASE_Q) >= 0) ||
1685 ts_st->opus_queued_samples + opus_samples >= 5760 /* 120ms */)) {
1686 mpegts_write_pes(s, st, ts_st->payload, ts_st->payload_size,
1687 ts_st->payload_pts, ts_st->payload_dts,
1688 ts_st->payload_flags & AV_PKT_FLAG_KEY, stream_id);
1689 ts_st->payload_size = 0;
1690 ts_st->opus_queued_samples = 0;
1693 if (st->codecpar->codec_type != AVMEDIA_TYPE_AUDIO || size > ts->pes_payload_size) {
1694 av_assert0(!ts_st->payload_size);
1695 // for video and subtitle, write a single pes packet
1696 mpegts_write_pes(s, st, buf, size, pts, dts,
1697 pkt->flags & AV_PKT_FLAG_KEY, stream_id);
1698 ts_st->opus_queued_samples = 0;
1703 if (!ts_st->payload_size) {
1704 ts_st->payload_pts = pts;
1705 ts_st->payload_dts = dts;
1706 ts_st->payload_flags = pkt->flags;
1709 memcpy(ts_st->payload + ts_st->payload_size, buf, size);
1710 ts_st->payload_size += size;
1711 ts_st->opus_queued_samples += opus_samples;
1718 static void mpegts_write_flush(AVFormatContext *s)
1722 /* flush current packets */
1723 for (i = 0; i < s->nb_streams; i++) {
1724 AVStream *st = s->streams[i];
1725 MpegTSWriteStream *ts_st = st->priv_data;
1726 if (ts_st->payload_size > 0) {
1727 mpegts_write_pes(s, st, ts_st->payload, ts_st->payload_size,
1728 ts_st->payload_pts, ts_st->payload_dts,
1729 ts_st->payload_flags & AV_PKT_FLAG_KEY, -1);
1730 ts_st->payload_size = 0;
1731 ts_st->opus_queued_samples = 0;
1736 static int mpegts_write_packet(AVFormatContext *s, AVPacket *pkt)
1739 mpegts_write_flush(s);
1742 return mpegts_write_packet_internal(s, pkt);
1746 static int mpegts_write_end(AVFormatContext *s)
1749 mpegts_write_flush(s);
1754 static void mpegts_deinit(AVFormatContext *s)
1756 MpegTSWrite *ts = s->priv_data;
1757 MpegTSService *service;
1760 for (i = 0; i < s->nb_streams; i++) {
1761 AVStream *st = s->streams[i];
1762 MpegTSWriteStream *ts_st = st->priv_data;
1764 av_freep(&ts_st->payload);
1766 avformat_free_context(ts_st->amux);
1772 for (i = 0; i < ts->nb_services; i++) {
1773 service = ts->services[i];
1774 av_freep(&service->provider_name);
1775 av_freep(&service->name);
1778 av_freep(&ts->services);
1781 static int mpegts_check_bitstream(struct AVFormatContext *s, const AVPacket *pkt)
1784 AVStream *st = s->streams[pkt->stream_index];
1786 if (st->codecpar->codec_id == AV_CODEC_ID_H264) {
1787 if (pkt->size >= 5 && AV_RB32(pkt->data) != 0x0000001 &&
1788 AV_RB24(pkt->data) != 0x000001)
1789 ret = ff_stream_add_bitstream_filter(st, "h264_mp4toannexb", NULL);
1790 } else if (st->codecpar->codec_id == AV_CODEC_ID_HEVC) {
1791 if (pkt->size >= 5 && AV_RB32(pkt->data) != 0x0000001 &&
1792 AV_RB24(pkt->data) != 0x000001)
1793 ret = ff_stream_add_bitstream_filter(st, "hevc_mp4toannexb", NULL);
1799 static const AVOption options[] = {
1800 { "mpegts_transport_stream_id", "Set transport_stream_id field.",
1801 offsetof(MpegTSWrite, transport_stream_id), AV_OPT_TYPE_INT,
1802 { .i64 = 0x0001 }, 0x0001, 0xffff, AV_OPT_FLAG_ENCODING_PARAM },
1803 { "mpegts_original_network_id", "Set original_network_id field.",
1804 offsetof(MpegTSWrite, original_network_id), AV_OPT_TYPE_INT,
1805 { .i64 = 0x0001 }, 0x0001, 0xffff, AV_OPT_FLAG_ENCODING_PARAM },
1806 { "mpegts_service_id", "Set service_id field.",
1807 offsetof(MpegTSWrite, service_id), AV_OPT_TYPE_INT,
1808 { .i64 = 0x0001 }, 0x0001, 0xffff, AV_OPT_FLAG_ENCODING_PARAM },
1809 { "mpegts_service_type", "Set service_type field.",
1810 offsetof(MpegTSWrite, service_type), AV_OPT_TYPE_INT,
1811 { .i64 = 0x01 }, 0x01, 0xff, AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
1812 { "digital_tv", "Digital Television.",
1813 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_DIGITAL_TV }, 0x01, 0xff,
1814 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
1815 { "digital_radio", "Digital Radio.",
1816 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_DIGITAL_RADIO }, 0x01, 0xff,
1817 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
1818 { "teletext", "Teletext.",
1819 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_TELETEXT }, 0x01, 0xff,
1820 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
1821 { "advanced_codec_digital_radio", "Advanced Codec Digital Radio.",
1822 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_ADVANCED_CODEC_DIGITAL_RADIO }, 0x01, 0xff,
1823 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
1824 { "mpeg2_digital_hdtv", "MPEG2 Digital HDTV.",
1825 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_MPEG2_DIGITAL_HDTV }, 0x01, 0xff,
1826 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
1827 { "advanced_codec_digital_sdtv", "Advanced Codec Digital SDTV.",
1828 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_ADVANCED_CODEC_DIGITAL_SDTV }, 0x01, 0xff,
1829 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
1830 { "advanced_codec_digital_hdtv", "Advanced Codec Digital HDTV.",
1831 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_ADVANCED_CODEC_DIGITAL_HDTV }, 0x01, 0xff,
1832 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
1833 { "hevc_digital_hdtv", "HEVC Digital Television Service.",
1834 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_HEVC_DIGITAL_HDTV }, 0x01, 0xff,
1835 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
1836 { "mpegts_pmt_start_pid", "Set the first pid of the PMT.",
1837 offsetof(MpegTSWrite, pmt_start_pid), AV_OPT_TYPE_INT,
1838 { .i64 = 0x1000 }, 0x0010, 0x1f00, AV_OPT_FLAG_ENCODING_PARAM },
1839 { "mpegts_start_pid", "Set the first pid.",
1840 offsetof(MpegTSWrite, start_pid), AV_OPT_TYPE_INT,
1841 { .i64 = 0x0100 }, 0x0020, 0x0f00, AV_OPT_FLAG_ENCODING_PARAM },
1842 { "mpegts_m2ts_mode", "Enable m2ts mode.",
1843 offsetof(MpegTSWrite, m2ts_mode), AV_OPT_TYPE_BOOL,
1844 { .i64 = -1 }, -1, 1, AV_OPT_FLAG_ENCODING_PARAM },
1846 offsetof(MpegTSWrite, mux_rate), AV_OPT_TYPE_INT,
1847 { .i64 = 1 }, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
1848 { "pes_payload_size", "Minimum PES packet payload in bytes",
1849 offsetof(MpegTSWrite, pes_payload_size), AV_OPT_TYPE_INT,
1850 { .i64 = DEFAULT_PES_PAYLOAD_SIZE }, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
1851 { "mpegts_flags", "MPEG-TS muxing flags",
1852 offsetof(MpegTSWrite, flags), AV_OPT_TYPE_FLAGS, { .i64 = 0 }, 0, INT_MAX,
1853 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_flags" },
1854 { "resend_headers", "Reemit PAT/PMT before writing the next packet",
1855 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_FLAG_REEMIT_PAT_PMT }, 0, INT_MAX,
1856 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_flags" },
1857 { "latm", "Use LATM packetization for AAC",
1858 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_FLAG_AAC_LATM }, 0, INT_MAX,
1859 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_flags" },
1860 { "pat_pmt_at_frames", "Reemit PAT and PMT at each video frame",
1861 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_FLAG_PAT_PMT_AT_FRAMES}, 0, INT_MAX,
1862 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_flags" },
1863 { "system_b", "Conform to System B (DVB) instead of System A (ATSC)",
1864 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_FLAG_SYSTEM_B }, 0, INT_MAX,
1865 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_flags" },
1866 // backward compatibility
1867 { "resend_headers", "Reemit PAT/PMT before writing the next packet",
1868 offsetof(MpegTSWrite, reemit_pat_pmt), AV_OPT_TYPE_INT,
1869 { .i64 = 0 }, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
1870 { "mpegts_copyts", "don't offset dts/pts",
1871 offsetof(MpegTSWrite, copyts), AV_OPT_TYPE_BOOL,
1872 { .i64 = -1 }, -1, 1, AV_OPT_FLAG_ENCODING_PARAM },
1873 { "tables_version", "set PAT, PMT and SDT version",
1874 offsetof(MpegTSWrite, tables_version), AV_OPT_TYPE_INT,
1875 { .i64 = 0 }, 0, 31, AV_OPT_FLAG_ENCODING_PARAM },
1876 { "omit_video_pes_length", "Omit the PES packet length for video packets",
1877 offsetof(MpegTSWrite, omit_video_pes_length), AV_OPT_TYPE_BOOL,
1878 { .i64 = 1 }, 0, 1, AV_OPT_FLAG_ENCODING_PARAM },
1879 { "pcr_period", "PCR retransmission time",
1880 offsetof(MpegTSWrite, pcr_period), AV_OPT_TYPE_INT,
1881 { .i64 = PCR_RETRANS_TIME }, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
1882 { "pat_period", "PAT/PMT retransmission time limit in seconds",
1883 offsetof(MpegTSWrite, pat_period), AV_OPT_TYPE_DOUBLE,
1884 { .dbl = INT_MAX }, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
1885 { "sdt_period", "SDT retransmission time limit in seconds",
1886 offsetof(MpegTSWrite, sdt_period), AV_OPT_TYPE_DOUBLE,
1887 { .dbl = INT_MAX }, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
1891 static const AVClass mpegts_muxer_class = {
1892 .class_name = "MPEGTS muxer",
1893 .item_name = av_default_item_name,
1895 .version = LIBAVUTIL_VERSION_INT,
1898 AVOutputFormat ff_mpegts_muxer = {
1900 .long_name = NULL_IF_CONFIG_SMALL("MPEG-TS (MPEG-2 Transport Stream)"),
1901 .mime_type = "video/MP2T",
1902 .extensions = "ts,m2t,m2ts,mts",
1903 .priv_data_size = sizeof(MpegTSWrite),
1904 .audio_codec = AV_CODEC_ID_MP2,
1905 .video_codec = AV_CODEC_ID_MPEG2VIDEO,
1906 .init = mpegts_init,
1907 .write_packet = mpegts_write_packet,
1908 .write_trailer = mpegts_write_end,
1909 .deinit = mpegts_deinit,
1910 .check_bitstream = mpegts_check_bitstream,
1911 .flags = AVFMT_ALLOW_FLUSH | AVFMT_VARIABLE_FPS,
1912 .priv_class = &mpegts_muxer_class,