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;
61 // service_type values as defined in ETSI 300 468
63 MPEGTS_SERVICE_TYPE_DIGITAL_TV = 0x01,
64 MPEGTS_SERVICE_TYPE_DIGITAL_RADIO = 0x02,
65 MPEGTS_SERVICE_TYPE_TELETEXT = 0x03,
66 MPEGTS_SERVICE_TYPE_ADVANCED_CODEC_DIGITAL_RADIO = 0x0A,
67 MPEGTS_SERVICE_TYPE_MPEG2_DIGITAL_HDTV = 0x11,
68 MPEGTS_SERVICE_TYPE_ADVANCED_CODEC_DIGITAL_SDTV = 0x16,
69 MPEGTS_SERVICE_TYPE_ADVANCED_CODEC_DIGITAL_HDTV = 0x19
71 typedef struct MpegTSWrite {
72 const AVClass *av_class;
73 MpegTSSection pat; /* MPEG2 pat table */
74 MpegTSSection sdt; /* MPEG2 sdt table context */
75 MpegTSService **services;
77 int sdt_packet_period;
79 int pat_packet_period;
84 int mux_rate; ///< set to 1 when VBR
87 int transport_stream_id;
88 int original_network_id;
96 int reemit_pat_pmt; // backward compatibility
99 #define MPEGTS_FLAG_REEMIT_PAT_PMT 0x01
100 #define MPEGTS_FLAG_AAC_LATM 0x02
101 #define MPEGTS_FLAG_PAT_PMT_AT_FRAMES 0x04
102 #define MPEGTS_FLAG_SYSTEM_B 0x08
111 int omit_video_pes_length;
114 /* a PES packet header is generated every DEFAULT_PES_HEADER_FREQ packets */
115 #define DEFAULT_PES_HEADER_FREQ 16
116 #define DEFAULT_PES_PAYLOAD_SIZE ((DEFAULT_PES_HEADER_FREQ - 1) * 184 + 170)
118 /* The section length is 12 bits. The first 2 are set to 0, the remaining
119 * 10 bits should not exceed 1021. */
120 #define SECTION_LENGTH 1020
122 /* NOTE: 4 bytes must be left at the end for the crc32 */
123 static void mpegts_write_section(MpegTSSection *s, uint8_t *buf, int len)
126 unsigned char packet[TS_PACKET_SIZE];
127 const unsigned char *buf_ptr;
129 int first, b, len1, left;
131 crc = av_bswap32(av_crc(av_crc_get_table(AV_CRC_32_IEEE),
134 buf[len - 4] = (crc >> 24) & 0xff;
135 buf[len - 3] = (crc >> 16) & 0xff;
136 buf[len - 2] = (crc >> 8) & 0xff;
137 buf[len - 1] = crc & 0xff;
139 /* send each packet */
142 first = buf == buf_ptr;
150 s->cc = s->cc + 1 & 0xf;
153 *q++ = 0; /* 0 offset */
154 len1 = TS_PACKET_SIZE - (q - packet);
157 memcpy(q, buf_ptr, len1);
159 /* add known padding data */
160 left = TS_PACKET_SIZE - (q - packet);
162 memset(q, 0xff, left);
164 s->write_packet(s, packet);
171 static inline void put16(uint8_t **q_ptr, int val)
180 static int mpegts_write_section1(MpegTSSection *s, int tid, int id,
181 int version, int sec_num, int last_sec_num,
182 uint8_t *buf, int len)
184 uint8_t section[1024], *q;
185 unsigned int tot_len;
186 /* reserved_future_use field must be set to 1 for SDT */
187 unsigned int flags = tid == SDT_TID ? 0xf000 : 0xb000;
189 tot_len = 3 + 5 + len + 4;
190 /* check if not too big */
192 return AVERROR_INVALIDDATA;
196 put16(&q, flags | (len + 5 + 4)); /* 5 byte header + 4 byte CRC */
198 *q++ = 0xc1 | (version << 1); /* current_next_indicator = 1 */
203 mpegts_write_section(s, section, tot_len);
207 /*********************************************/
210 #define DEFAULT_PROVIDER_NAME "FFmpeg"
211 #define DEFAULT_SERVICE_NAME "Service01"
213 /* we retransmit the SI info at this rate */
214 #define SDT_RETRANS_TIME 500
215 #define PAT_RETRANS_TIME 100
216 #define PCR_RETRANS_TIME 20
218 typedef struct MpegTSWriteStream {
219 struct MpegTSService *service;
220 int pid; /* stream associated pid */
223 int first_pts_check; ///< first pts check needed
224 int prev_payload_key;
229 AVFormatContext *amux;
233 int opus_queued_samples;
234 int opus_pending_trim_start;
237 static void mpegts_write_pat(AVFormatContext *s)
239 MpegTSWrite *ts = s->priv_data;
240 MpegTSService *service;
241 uint8_t data[SECTION_LENGTH], *q;
245 for (i = 0; i < ts->nb_services; i++) {
246 service = ts->services[i];
247 put16(&q, service->sid);
248 put16(&q, 0xe000 | service->pmt.pid);
250 mpegts_write_section1(&ts->pat, PAT_TID, ts->tsid, ts->tables_version, 0, 0,
254 static int mpegts_write_pmt(AVFormatContext *s, MpegTSService *service)
256 MpegTSWrite *ts = s->priv_data;
257 uint8_t data[SECTION_LENGTH], *q, *desc_length_ptr, *program_info_length_ptr;
258 int val, stream_type, i, err = 0;
261 put16(&q, 0xe000 | service->pcr_pid);
263 program_info_length_ptr = q;
264 q += 2; /* patched after */
266 /* put program info here */
268 val = 0xf000 | (q - program_info_length_ptr - 2);
269 program_info_length_ptr[0] = val >> 8;
270 program_info_length_ptr[1] = val;
272 for (i = 0; i < s->nb_streams; i++) {
273 AVStream *st = s->streams[i];
274 MpegTSWriteStream *ts_st = st->priv_data;
275 AVDictionaryEntry *lang = av_dict_get(st->metadata, "language", NULL, 0);
277 if (s->nb_programs) {
278 AVProgram *program = av_find_program_from_stream(s, NULL, i);
279 if (program->id != service->sid)
283 if (q - data > SECTION_LENGTH - 32) {
287 switch (st->codec->codec_id) {
288 case AV_CODEC_ID_MPEG1VIDEO:
289 case AV_CODEC_ID_MPEG2VIDEO:
290 stream_type = STREAM_TYPE_VIDEO_MPEG2;
292 case AV_CODEC_ID_MPEG4:
293 stream_type = STREAM_TYPE_VIDEO_MPEG4;
295 case AV_CODEC_ID_H264:
296 stream_type = STREAM_TYPE_VIDEO_H264;
298 case AV_CODEC_ID_HEVC:
299 stream_type = STREAM_TYPE_VIDEO_HEVC;
301 case AV_CODEC_ID_CAVS:
302 stream_type = STREAM_TYPE_VIDEO_CAVS;
304 case AV_CODEC_ID_DIRAC:
305 stream_type = STREAM_TYPE_VIDEO_DIRAC;
307 case AV_CODEC_ID_VC1:
308 stream_type = STREAM_TYPE_VIDEO_VC1;
310 case AV_CODEC_ID_MP2:
311 case AV_CODEC_ID_MP3:
312 stream_type = STREAM_TYPE_AUDIO_MPEG1;
314 case AV_CODEC_ID_AAC:
315 stream_type = (ts->flags & MPEGTS_FLAG_AAC_LATM)
316 ? STREAM_TYPE_AUDIO_AAC_LATM
317 : STREAM_TYPE_AUDIO_AAC;
319 case AV_CODEC_ID_AAC_LATM:
320 stream_type = STREAM_TYPE_AUDIO_AAC_LATM;
322 case AV_CODEC_ID_AC3:
323 stream_type = (ts->flags & MPEGTS_FLAG_SYSTEM_B)
324 ? STREAM_TYPE_PRIVATE_DATA
325 : STREAM_TYPE_AUDIO_AC3;
327 case AV_CODEC_ID_EAC3:
328 stream_type = (ts->flags & MPEGTS_FLAG_SYSTEM_B)
329 ? STREAM_TYPE_PRIVATE_DATA
330 : STREAM_TYPE_AUDIO_EAC3;
332 case AV_CODEC_ID_DTS:
333 stream_type = STREAM_TYPE_AUDIO_DTS;
335 case AV_CODEC_ID_TRUEHD:
336 stream_type = STREAM_TYPE_AUDIO_TRUEHD;
338 case AV_CODEC_ID_OPUS:
339 stream_type = STREAM_TYPE_PRIVATE_DATA;
342 stream_type = STREAM_TYPE_PRIVATE_DATA;
347 put16(&q, 0xe000 | ts_st->pid);
349 q += 2; /* patched after */
351 /* write optional descriptors here */
352 switch (st->codec->codec_type) {
353 case AVMEDIA_TYPE_AUDIO:
354 if (st->codec->codec_id==AV_CODEC_ID_AC3 && (ts->flags & MPEGTS_FLAG_SYSTEM_B)) {
355 *q++=0x6a; // AC3 descriptor see A038 DVB SI
356 *q++=1; // 1 byte, all flags sets to 0
357 *q++=0; // omit all fields...
359 if (st->codec->codec_id==AV_CODEC_ID_EAC3 && (ts->flags & MPEGTS_FLAG_SYSTEM_B)) {
360 *q++=0x7a; // EAC3 descriptor see A038 DVB SI
361 *q++=1; // 1 byte, all flags sets to 0
362 *q++=0; // omit all fields...
364 if (st->codec->codec_id==AV_CODEC_ID_S302M) {
365 *q++ = 0x05; /* MPEG-2 registration descriptor*/
372 if (st->codec->codec_id==AV_CODEC_ID_OPUS) {
373 /* 6 bytes registration descriptor, 4 bytes Opus audio descriptor */
374 if (q - data > SECTION_LENGTH - 6 - 4) {
379 *q++ = 0x05; /* MPEG-2 registration descriptor*/
386 *q++ = 0x7f; /* DVB extension descriptor */
390 if (st->codec->extradata && st->codec->extradata_size >= 19) {
391 if (st->codec->extradata[18] == 0 && st->codec->channels <= 2) {
392 /* RTP mapping family */
393 *q++ = st->codec->channels;
394 } else if (st->codec->extradata[18] == 1 && st->codec->channels <= 8 &&
395 st->codec->extradata_size >= 21 + st->codec->channels) {
396 static const uint8_t coupled_stream_counts[9] = {
397 1, 0, 1, 1, 2, 2, 2, 3, 3
399 static const uint8_t channel_map_a[8][8] = {
406 {0, 4, 1, 2, 3, 5, 6},
407 {0, 6, 1, 2, 3, 4, 5, 7},
409 static const uint8_t channel_map_b[8][8] = {
416 {0, 1, 2, 3, 4, 5, 6},
417 {0, 1, 2, 3, 4, 5, 6, 7},
419 /* Vorbis mapping family */
421 if (st->codec->extradata[19] == st->codec->channels - coupled_stream_counts[st->codec->channels] &&
422 st->codec->extradata[20] == coupled_stream_counts[st->codec->channels] &&
423 memcmp(&st->codec->extradata[21], channel_map_a[st->codec->channels-1], st->codec->channels) == 0) {
424 *q++ = st->codec->channels;
425 } else if (st->codec->channels >= 2 && st->codec->extradata[19] == st->codec->channels &&
426 st->codec->extradata[20] == 0 &&
427 memcmp(&st->codec->extradata[21], channel_map_b[st->codec->channels-1], st->codec->channels) == 0) {
428 *q++ = st->codec->channels | 0x80;
430 /* Unsupported, could write an extended descriptor here */
431 av_log(s, AV_LOG_ERROR, "Unsupported Opus Vorbis-style channel mapping");
436 av_log(s, AV_LOG_ERROR, "Unsupported Opus channel mapping for family %d", st->codec->extradata[18]);
439 } else if (st->codec->channels <= 2) {
440 /* Assume RTP mapping family */
441 *q++ = st->codec->channels;
444 av_log(s, AV_LOG_ERROR, "Unsupported Opus channel mapping");
451 char *next = lang->value;
454 *q++ = 0x0a; /* ISO 639 language descriptor */
458 for (p = lang->value; next && *len_ptr < 255 / 4 * 4; p = next + 1) {
459 if (q - data > SECTION_LENGTH - 4) {
463 next = strchr(p, ',');
464 if (strlen(p) != 3 && (!next || next != p + 3))
465 continue; /* not a 3-letter code */
471 if (st->disposition & AV_DISPOSITION_CLEAN_EFFECTS)
473 else if (st->disposition & AV_DISPOSITION_HEARING_IMPAIRED)
475 else if (st->disposition & AV_DISPOSITION_VISUAL_IMPAIRED)
478 *q++ = 0; /* undefined type */
484 q -= 2; /* no language codes were written */
487 case AVMEDIA_TYPE_SUBTITLE:
489 const char default_language[] = "und";
490 const char *language = lang && strlen(lang->value) >= 3 ? lang->value : default_language;
492 if (st->codec->codec_id == AV_CODEC_ID_DVB_SUBTITLE) {
494 int extradata_copied = 0;
496 *q++ = 0x59; /* subtitling_descriptor */
499 while (strlen(language) >= 3) {
500 if (sizeof(data) - (q - data) < 8) { /* 8 bytes per DVB subtitle substream data */
508 if (*language != '\0')
511 if (st->codec->extradata_size - extradata_copied >= 5) {
512 *q++ = st->codec->extradata[extradata_copied + 4]; /* subtitling_type */
513 memcpy(q, st->codec->extradata + extradata_copied, 4); /* composition_page_id and ancillary_page_id */
514 extradata_copied += 5;
518 * 0x10 - normal with no monitor aspect ratio criticality
519 * 0x20 - for the hard of hearing with no monitor aspect ratio criticality */
520 *q++ = (st->disposition & AV_DISPOSITION_HEARING_IMPAIRED) ? 0x20 : 0x10;
521 if ((st->codec->extradata_size == 4) && (extradata_copied == 0)) {
522 /* support of old 4-byte extradata format */
523 memcpy(q, st->codec->extradata, 4); /* composition_page_id and ancillary_page_id */
524 extradata_copied += 4;
527 put16(&q, 1); /* composition_page_id */
528 put16(&q, 1); /* ancillary_page_id */
533 *len_ptr = q - len_ptr - 1;
534 } else if (st->codec->codec_id == AV_CODEC_ID_DVB_TELETEXT) {
535 uint8_t *len_ptr = NULL;
536 int extradata_copied = 0;
538 /* The descriptor tag. teletext_descriptor */
542 while (strlen(language) >= 3 && q - data < sizeof(data) - 6) {
547 if (*language != '\0')
550 if (st->codec->extradata_size - 1 > extradata_copied) {
551 memcpy(q, st->codec->extradata + extradata_copied, 2);
552 extradata_copied += 2;
555 /* The Teletext descriptor:
556 * teletext_type: This 5-bit field indicates the type of Teletext page indicated. (0x01 Initial Teletext page)
557 * teletext_magazine_number: This is a 3-bit field which identifies the magazine number.
558 * teletext_page_number: This is an 8-bit field giving two 4-bit hex digits identifying the page number. */
564 *len_ptr = q - len_ptr - 1;
568 case AVMEDIA_TYPE_VIDEO:
569 if (stream_type == STREAM_TYPE_VIDEO_DIRAC) {
570 *q++ = 0x05; /*MPEG-2 registration descriptor*/
576 } else if (stream_type == STREAM_TYPE_VIDEO_VC1) {
577 *q++ = 0x05; /*MPEG-2 registration descriptor*/
585 case AVMEDIA_TYPE_DATA:
586 if (st->codec->codec_id == AV_CODEC_ID_SMPTE_KLV) {
587 *q++ = 0x05; /* MPEG-2 registration descriptor */
597 val = 0xf000 | (q - desc_length_ptr - 2);
598 desc_length_ptr[0] = val >> 8;
599 desc_length_ptr[1] = val;
603 av_log(s, AV_LOG_ERROR,
604 "The PMT section cannot fit stream %d and all following streams.\n"
605 "Try reducing the number of languages in the audio streams "
606 "or the total number of streams.\n", i);
608 mpegts_write_section1(&service->pmt, PMT_TID, service->sid, ts->tables_version, 0, 0,
613 /* NOTE: !str is accepted for an empty string */
614 static void putstr8(uint8_t **q_ptr, const char *str)
630 static void mpegts_write_sdt(AVFormatContext *s)
632 MpegTSWrite *ts = s->priv_data;
633 MpegTSService *service;
634 uint8_t data[SECTION_LENGTH], *q, *desc_list_len_ptr, *desc_len_ptr;
635 int i, running_status, free_ca_mode, val;
640 for (i = 0; i < ts->nb_services; i++) {
641 service = ts->services[i];
642 put16(&q, service->sid);
643 *q++ = 0xfc | 0x00; /* currently no EIT info */
644 desc_list_len_ptr = q;
646 running_status = 4; /* running */
649 /* write only one descriptor for the service name and provider */
653 *q++ = ts->service_type;
654 putstr8(&q, service->provider_name);
655 putstr8(&q, service->name);
656 desc_len_ptr[0] = q - desc_len_ptr - 1;
658 /* fill descriptor length */
659 val = (running_status << 13) | (free_ca_mode << 12) |
660 (q - desc_list_len_ptr - 2);
661 desc_list_len_ptr[0] = val >> 8;
662 desc_list_len_ptr[1] = val;
664 mpegts_write_section1(&ts->sdt, SDT_TID, ts->tsid, ts->tables_version, 0, 0,
668 static MpegTSService *mpegts_add_service(MpegTSWrite *ts, int sid,
669 const char *provider_name,
672 MpegTSService *service;
674 service = av_mallocz(sizeof(MpegTSService));
677 service->pmt.pid = ts->pmt_start_pid + ts->nb_services;
679 service->pcr_pid = 0x1fff;
680 service->provider_name = av_strdup(provider_name);
681 service->name = av_strdup(name);
682 if (!service->provider_name || !service->name)
684 if (av_dynarray_add_nofree(&ts->services, &ts->nb_services, service) < 0)
689 av_freep(&service->provider_name);
690 av_freep(&service->name);
695 static int64_t get_pcr(const MpegTSWrite *ts, AVIOContext *pb)
697 return av_rescale(avio_tell(pb) + 11, 8 * PCR_TIME_BASE, ts->mux_rate) +
701 static void mpegts_prefix_m2ts_header(AVFormatContext *s)
703 MpegTSWrite *ts = s->priv_data;
705 int64_t pcr = get_pcr(s->priv_data, s->pb);
706 uint32_t tp_extra_header = pcr % 0x3fffffff;
707 tp_extra_header = AV_RB32(&tp_extra_header);
708 avio_write(s->pb, (unsigned char *) &tp_extra_header,
709 sizeof(tp_extra_header));
713 static void section_write_packet(MpegTSSection *s, const uint8_t *packet)
715 AVFormatContext *ctx = s->opaque;
716 mpegts_prefix_m2ts_header(ctx);
717 avio_write(ctx->pb, packet, TS_PACKET_SIZE);
720 static int mpegts_init(AVFormatContext *s)
722 MpegTSWrite *ts = s->priv_data;
723 MpegTSWriteStream *ts_st;
724 MpegTSService *service;
725 AVStream *st, *pcr_st = NULL;
726 AVDictionaryEntry *title, *provider;
728 const char *service_name;
729 const char *provider_name;
733 if (s->max_delay < 0) /* Not set by the caller */
736 // round up to a whole number of TS packets
737 ts->pes_payload_size = (ts->pes_payload_size + 14 + 183) / 184 * 184 - 14;
739 ts->tsid = ts->transport_stream_id;
740 ts->onid = ts->original_network_id;
741 if (!s->nb_programs) {
742 /* allocate a single DVB service */
743 title = av_dict_get(s->metadata, "service_name", NULL, 0);
745 title = av_dict_get(s->metadata, "title", NULL, 0);
746 service_name = title ? title->value : DEFAULT_SERVICE_NAME;
747 provider = av_dict_get(s->metadata, "service_provider", NULL, 0);
748 provider_name = provider ? provider->value : DEFAULT_PROVIDER_NAME;
749 service = mpegts_add_service(ts, ts->service_id,
750 provider_name, service_name);
753 return AVERROR(ENOMEM);
755 service->pmt.write_packet = section_write_packet;
756 service->pmt.opaque = s;
757 service->pmt.cc = 15;
759 for (i = 0; i < s->nb_programs; i++) {
760 AVProgram *program = s->programs[i];
761 title = av_dict_get(program->metadata, "service_name", NULL, 0);
763 title = av_dict_get(program->metadata, "title", NULL, 0);
764 service_name = title ? title->value : DEFAULT_SERVICE_NAME;
765 provider = av_dict_get(program->metadata, "service_provider", NULL, 0);
766 provider_name = provider ? provider->value : DEFAULT_PROVIDER_NAME;
767 service = mpegts_add_service(ts, program->id,
768 provider_name, service_name);
771 return AVERROR(ENOMEM);
773 service->pmt.write_packet = section_write_packet;
774 service->pmt.opaque = s;
775 service->pmt.cc = 15;
779 ts->pat.pid = PAT_PID;
780 /* Initialize at 15 so that it wraps and is equal to 0 for the
781 * first packet we write. */
783 ts->pat.write_packet = section_write_packet;
786 ts->sdt.pid = SDT_PID;
788 ts->sdt.write_packet = section_write_packet;
791 pids = av_malloc_array(s->nb_streams, sizeof(*pids));
793 ret = AVERROR(ENOMEM);
797 /* assign pids to each stream */
798 for (i = 0; i < s->nb_streams; i++) {
801 ts_st = av_mallocz(sizeof(MpegTSWriteStream));
803 ret = AVERROR(ENOMEM);
806 st->priv_data = ts_st;
808 ts_st->user_tb = st->time_base;
809 avpriv_set_pts_info(st, 33, 1, 90000);
811 ts_st->payload = av_mallocz(ts->pes_payload_size);
812 if (!ts_st->payload) {
813 ret = AVERROR(ENOMEM);
816 ts_st->service = service;
817 /* MPEG pid values < 16 are reserved. Applications which set st->id in
818 * this range are assigned a calculated pid. */
820 ts_st->pid = ts->start_pid + i;
821 } else if (st->id < 0x1FFF) {
824 av_log(s, AV_LOG_ERROR,
825 "Invalid stream id %d, must be less than 8191\n", st->id);
826 ret = AVERROR(EINVAL);
829 if (ts_st->pid == service->pmt.pid) {
830 av_log(s, AV_LOG_ERROR, "Duplicate stream id %d\n", ts_st->pid);
831 ret = AVERROR(EINVAL);
834 for (j = 0; j < i; j++) {
835 if (pids[j] == ts_st->pid) {
836 av_log(s, AV_LOG_ERROR, "Duplicate stream id %d\n", ts_st->pid);
837 ret = AVERROR(EINVAL);
841 pids[i] = ts_st->pid;
842 ts_st->payload_pts = AV_NOPTS_VALUE;
843 ts_st->payload_dts = AV_NOPTS_VALUE;
844 ts_st->first_pts_check = 1;
846 /* update PCR pid by using the first video stream */
847 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO &&
848 service->pcr_pid == 0x1fff) {
849 service->pcr_pid = ts_st->pid;
852 if (st->codec->codec_id == AV_CODEC_ID_AAC &&
853 st->codec->extradata_size > 0) {
855 ts_st->amux = avformat_alloc_context();
857 ret = AVERROR(ENOMEM);
860 ts_st->amux->oformat =
861 av_guess_format((ts->flags & MPEGTS_FLAG_AAC_LATM) ? "latm" : "adts",
863 if (!ts_st->amux->oformat) {
864 ret = AVERROR(EINVAL);
867 if (!(ast = avformat_new_stream(ts_st->amux, NULL))) {
868 ret = AVERROR(ENOMEM);
871 ret = avcodec_copy_context(ast->codec, st->codec);
874 ast->time_base = st->time_base;
875 ret = avformat_write_header(ts_st->amux, NULL);
879 if (st->codec->codec_id == AV_CODEC_ID_OPUS) {
880 ts_st->opus_pending_trim_start = st->codec->initial_padding * 48000 / st->codec->sample_rate;
886 /* if no video stream, use the first stream as PCR */
887 if (service->pcr_pid == 0x1fff && s->nb_streams > 0) {
888 pcr_st = s->streams[0];
889 ts_st = pcr_st->priv_data;
890 service->pcr_pid = ts_st->pid;
892 ts_st = pcr_st->priv_data;
894 if (ts->mux_rate > 1) {
895 service->pcr_packet_period = (int64_t)ts->mux_rate * ts->pcr_period /
896 (TS_PACKET_SIZE * 8 * 1000);
897 ts->sdt_packet_period = (int64_t)ts->mux_rate * SDT_RETRANS_TIME /
898 (TS_PACKET_SIZE * 8 * 1000);
899 ts->pat_packet_period = (int64_t)ts->mux_rate * PAT_RETRANS_TIME /
900 (TS_PACKET_SIZE * 8 * 1000);
903 ts->first_pcr = av_rescale(s->max_delay, PCR_TIME_BASE, AV_TIME_BASE);
905 /* Arbitrary values, PAT/PMT will also be written on video key frames */
906 ts->sdt_packet_period = 200;
907 ts->pat_packet_period = 40;
908 if (pcr_st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
909 if (!pcr_st->codec->frame_size) {
910 av_log(s, AV_LOG_WARNING, "frame size not set\n");
911 service->pcr_packet_period =
912 pcr_st->codec->sample_rate / (10 * 512);
914 service->pcr_packet_period =
915 pcr_st->codec->sample_rate / (10 * pcr_st->codec->frame_size);
918 // max delta PCR 0.1s
919 // TODO: should be avg_frame_rate
920 service->pcr_packet_period =
921 ts_st->user_tb.den / (10 * ts_st->user_tb.num);
923 if (!service->pcr_packet_period)
924 service->pcr_packet_period = 1;
927 ts->last_pat_ts = AV_NOPTS_VALUE;
928 ts->last_sdt_ts = AV_NOPTS_VALUE;
929 // The user specified a period, use only it
930 if (ts->pat_period < INT_MAX/2) {
931 ts->pat_packet_period = INT_MAX;
933 if (ts->sdt_period < INT_MAX/2) {
934 ts->sdt_packet_period = INT_MAX;
937 // output a PCR as soon as possible
938 service->pcr_packet_count = service->pcr_packet_period;
939 ts->pat_packet_count = ts->pat_packet_period - 1;
940 ts->sdt_packet_count = ts->sdt_packet_period - 1;
942 if (ts->mux_rate == 1)
943 av_log(s, AV_LOG_VERBOSE, "muxrate VBR, ");
945 av_log(s, AV_LOG_VERBOSE, "muxrate %d, ", ts->mux_rate);
946 av_log(s, AV_LOG_VERBOSE,
947 "pcr every %d pkts, sdt every %d, pat/pmt every %d pkts\n",
948 service->pcr_packet_period,
949 ts->sdt_packet_period, ts->pat_packet_period);
951 if (ts->m2ts_mode == -1) {
952 if (av_match_ext(s->filename, "m2ts")) {
966 /* send SDT, PAT and PMT tables regulary */
967 static void retransmit_si_info(AVFormatContext *s, int force_pat, int64_t dts)
969 MpegTSWrite *ts = s->priv_data;
972 if (++ts->sdt_packet_count == ts->sdt_packet_period ||
973 (dts != AV_NOPTS_VALUE && ts->last_sdt_ts == AV_NOPTS_VALUE) ||
974 (dts != AV_NOPTS_VALUE && dts - ts->last_sdt_ts >= ts->sdt_period*90000.0)
976 ts->sdt_packet_count = 0;
977 if (dts != AV_NOPTS_VALUE)
978 ts->last_sdt_ts = FFMAX(dts, ts->last_sdt_ts);
981 if (++ts->pat_packet_count == ts->pat_packet_period ||
982 (dts != AV_NOPTS_VALUE && ts->last_pat_ts == AV_NOPTS_VALUE) ||
983 (dts != AV_NOPTS_VALUE && dts - ts->last_pat_ts >= ts->pat_period*90000.0) ||
985 ts->pat_packet_count = 0;
986 if (dts != AV_NOPTS_VALUE)
987 ts->last_pat_ts = FFMAX(dts, ts->last_pat_ts);
989 for (i = 0; i < ts->nb_services; i++)
990 mpegts_write_pmt(s, ts->services[i]);
994 static int write_pcr_bits(uint8_t *buf, int64_t pcr)
996 int64_t pcr_low = pcr % 300, pcr_high = pcr / 300;
998 *buf++ = pcr_high >> 25;
999 *buf++ = pcr_high >> 17;
1000 *buf++ = pcr_high >> 9;
1001 *buf++ = pcr_high >> 1;
1002 *buf++ = pcr_high << 7 | pcr_low >> 8 | 0x7e;
1008 /* Write a single null transport stream packet */
1009 static void mpegts_insert_null_packet(AVFormatContext *s)
1012 uint8_t buf[TS_PACKET_SIZE];
1019 memset(q, 0x0FF, TS_PACKET_SIZE - (q - buf));
1020 mpegts_prefix_m2ts_header(s);
1021 avio_write(s->pb, buf, TS_PACKET_SIZE);
1024 /* Write a single transport stream packet with a PCR and no payload */
1025 static void mpegts_insert_pcr_only(AVFormatContext *s, AVStream *st)
1027 MpegTSWrite *ts = s->priv_data;
1028 MpegTSWriteStream *ts_st = st->priv_data;
1030 uint8_t buf[TS_PACKET_SIZE];
1034 *q++ = ts_st->pid >> 8;
1036 *q++ = 0x20 | ts_st->cc; /* Adaptation only */
1037 /* Continuity Count field does not increment (see 13818-1 section 2.4.3.3) */
1038 *q++ = TS_PACKET_SIZE - 5; /* Adaptation Field Length */
1039 *q++ = 0x10; /* Adaptation flags: PCR present */
1041 /* PCR coded into 6 bytes */
1042 q += write_pcr_bits(q, get_pcr(ts, s->pb));
1044 /* stuffing bytes */
1045 memset(q, 0xFF, TS_PACKET_SIZE - (q - buf));
1046 mpegts_prefix_m2ts_header(s);
1047 avio_write(s->pb, buf, TS_PACKET_SIZE);
1050 static void write_pts(uint8_t *q, int fourbits, int64_t pts)
1054 val = fourbits << 4 | (((pts >> 30) & 0x07) << 1) | 1;
1056 val = (((pts >> 15) & 0x7fff) << 1) | 1;
1059 val = (((pts) & 0x7fff) << 1) | 1;
1064 /* Set an adaptation field flag in an MPEG-TS packet*/
1065 static void set_af_flag(uint8_t *pkt, int flag)
1067 // expect at least one flag to set
1070 if ((pkt[3] & 0x20) == 0) {
1071 // no AF yet, set adaptation field flag
1073 // 1 byte length, no flags
1080 /* Extend the adaptation field by size bytes */
1081 static void extend_af(uint8_t *pkt, int size)
1083 // expect already existing adaptation field
1084 av_assert0(pkt[3] & 0x20);
1088 /* Get a pointer to MPEG-TS payload (right after TS packet header) */
1089 static uint8_t *get_ts_payload_start(uint8_t *pkt)
1092 return pkt + 5 + pkt[4];
1097 /* Add a PES header to the front of the payload, and segment into an integer
1098 * number of TS packets. The final TS packet is padded using an oversized
1099 * adaptation header to exactly fill the last TS packet.
1100 * NOTE: 'payload' contains a complete PES payload. */
1101 static void mpegts_write_pes(AVFormatContext *s, AVStream *st,
1102 const uint8_t *payload, int payload_size,
1103 int64_t pts, int64_t dts, int key)
1105 MpegTSWriteStream *ts_st = st->priv_data;
1106 MpegTSWrite *ts = s->priv_data;
1107 uint8_t buf[TS_PACKET_SIZE];
1109 int val, is_start, len, header_len, write_pcr, is_dvb_subtitle, is_dvb_teletext, flags;
1110 int afc_len, stuffing_len;
1111 int64_t pcr = -1; /* avoid warning */
1112 int64_t delay = av_rescale(s->max_delay, 90000, AV_TIME_BASE);
1113 int force_pat = st->codec->codec_type == AVMEDIA_TYPE_VIDEO && key && !ts_st->prev_payload_key;
1115 av_assert0(ts_st->payload != buf || st->codec->codec_type != AVMEDIA_TYPE_VIDEO);
1116 if (ts->flags & MPEGTS_FLAG_PAT_PMT_AT_FRAMES && st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
1121 while (payload_size > 0) {
1122 retransmit_si_info(s, force_pat, dts);
1126 if (ts_st->pid == ts_st->service->pcr_pid) {
1127 if (ts->mux_rate > 1 || is_start) // VBR pcr period is based on frames
1128 ts_st->service->pcr_packet_count++;
1129 if (ts_st->service->pcr_packet_count >=
1130 ts_st->service->pcr_packet_period) {
1131 ts_st->service->pcr_packet_count = 0;
1136 if (ts->mux_rate > 1 && dts != AV_NOPTS_VALUE &&
1137 (dts - get_pcr(ts, s->pb) / 300) > delay) {
1138 /* pcr insert gets priority over null packet insert */
1140 mpegts_insert_pcr_only(s, st);
1142 mpegts_insert_null_packet(s);
1143 /* recalculate write_pcr and possibly retransmit si_info */
1147 /* prepare packet header */
1150 val = ts_st->pid >> 8;
1155 ts_st->cc = ts_st->cc + 1 & 0xf;
1156 *q++ = 0x10 | ts_st->cc; // payload indicator + CC
1157 if (key && is_start && pts != AV_NOPTS_VALUE) {
1158 // set Random Access for key frames
1159 if (ts_st->pid == ts_st->service->pcr_pid)
1161 set_af_flag(buf, 0x40);
1162 q = get_ts_payload_start(buf);
1165 set_af_flag(buf, 0x10);
1166 q = get_ts_payload_start(buf);
1167 // add 11, pcr references the last byte of program clock reference base
1168 if (ts->mux_rate > 1)
1169 pcr = get_pcr(ts, s->pb);
1171 pcr = (dts - delay) * 300;
1172 if (dts != AV_NOPTS_VALUE && dts < pcr / 300)
1173 av_log(s, AV_LOG_WARNING, "dts < pcr, TS is invalid\n");
1174 extend_af(buf, write_pcr_bits(q, pcr));
1175 q = get_ts_payload_start(buf);
1178 int pes_extension = 0;
1179 int pes_header_stuffing_bytes = 0;
1180 /* write PES header */
1184 is_dvb_subtitle = 0;
1185 is_dvb_teletext = 0;
1186 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
1187 if (st->codec->codec_id == AV_CODEC_ID_DIRAC)
1191 } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
1192 (st->codec->codec_id == AV_CODEC_ID_MP2 ||
1193 st->codec->codec_id == AV_CODEC_ID_MP3 ||
1194 st->codec->codec_id == AV_CODEC_ID_AAC)) {
1196 } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
1197 st->codec->codec_id == AV_CODEC_ID_AC3 &&
1202 if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE) {
1203 if (st->codec->codec_id == AV_CODEC_ID_DVB_SUBTITLE) {
1204 is_dvb_subtitle = 1;
1205 } else if (st->codec->codec_id == AV_CODEC_ID_DVB_TELETEXT) {
1206 is_dvb_teletext = 1;
1212 if (pts != AV_NOPTS_VALUE) {
1216 if (dts != AV_NOPTS_VALUE && pts != AV_NOPTS_VALUE && dts != pts) {
1220 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO &&
1221 st->codec->codec_id == AV_CODEC_ID_DIRAC) {
1222 /* set PES_extension_flag */
1226 /* One byte for PES2 extension flag +
1227 * one byte for extension length +
1228 * one byte for extension id */
1231 /* for Blu-ray AC3 Audio the PES Extension flag should be as follow
1232 * otherwise it will not play sound on blu-ray
1234 if (ts->m2ts_mode &&
1235 st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
1236 st->codec->codec_id == AV_CODEC_ID_AC3) {
1237 /* set PES_extension_flag */
1242 if (is_dvb_teletext) {
1243 pes_header_stuffing_bytes = 0x24 - header_len;
1246 len = payload_size + header_len + 3;
1247 /* 3 extra bytes should be added to DVB subtitle payload: 0x20 0x00 at the beginning and trailing 0xff */
1248 if (is_dvb_subtitle) {
1254 if (ts->omit_video_pes_length && st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
1260 /* data alignment indicator is required for subtitle and data streams */
1261 if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE || st->codec->codec_type == AVMEDIA_TYPE_DATA)
1266 if (pts != AV_NOPTS_VALUE) {
1267 write_pts(q, flags >> 6, pts);
1270 if (dts != AV_NOPTS_VALUE && pts != AV_NOPTS_VALUE && dts != pts) {
1271 write_pts(q, 1, dts);
1274 if (pes_extension && st->codec->codec_id == AV_CODEC_ID_DIRAC) {
1275 flags = 0x01; /* set PES_extension_flag_2 */
1277 *q++ = 0x80 | 0x01; /* marker bit + extension length */
1278 /* Set the stream ID extension flag bit to 0 and
1279 * write the extended stream ID. */
1282 /* For Blu-ray AC3 Audio Setting extended flags */
1283 if (ts->m2ts_mode &&
1285 st->codec->codec_id == AV_CODEC_ID_AC3) {
1286 flags = 0x01; /* set PES_extension_flag_2 */
1288 *q++ = 0x80 | 0x01; /* marker bit + extension length */
1289 *q++ = 0x00 | 0x71; /* for AC3 Audio (specifically on blue-rays) */
1293 if (is_dvb_subtitle) {
1294 /* First two fields of DVB subtitles PES data:
1295 * data_identifier: for DVB subtitle streams shall be coded with the value 0x20
1296 * subtitle_stream_id: for DVB subtitle stream shall be identified by the value 0x00 */
1300 if (is_dvb_teletext) {
1301 memset(q, 0xff, pes_header_stuffing_bytes);
1302 q += pes_header_stuffing_bytes;
1307 header_len = q - buf;
1309 len = TS_PACKET_SIZE - header_len;
1310 if (len > payload_size)
1312 stuffing_len = TS_PACKET_SIZE - header_len - len;
1313 if (stuffing_len > 0) {
1314 /* add stuffing with AFC */
1315 if (buf[3] & 0x20) {
1316 /* stuffing already present: increase its size */
1317 afc_len = buf[4] + 1;
1318 memmove(buf + 4 + afc_len + stuffing_len,
1320 header_len - (4 + afc_len));
1321 buf[4] += stuffing_len;
1322 memset(buf + 4 + afc_len, 0xff, stuffing_len);
1325 memmove(buf + 4 + stuffing_len, buf + 4, header_len - 4);
1327 buf[4] = stuffing_len - 1;
1328 if (stuffing_len >= 2) {
1330 memset(buf + 6, 0xff, stuffing_len - 2);
1335 if (is_dvb_subtitle && payload_size == len) {
1336 memcpy(buf + TS_PACKET_SIZE - len, payload, len - 1);
1337 buf[TS_PACKET_SIZE - 1] = 0xff; /* end_of_PES_data_field_marker: an 8-bit field with fixed contents 0xff for DVB subtitle */
1339 memcpy(buf + TS_PACKET_SIZE - len, payload, len);
1343 payload_size -= len;
1344 mpegts_prefix_m2ts_header(s);
1345 avio_write(s->pb, buf, TS_PACKET_SIZE);
1347 ts_st->prev_payload_key = key;
1350 int ff_check_h264_startcode(AVFormatContext *s, const AVStream *st, const AVPacket *pkt)
1352 if (pkt->size < 5 || AV_RB32(pkt->data) != 0x0000001 && AV_RB24(pkt->data) != 0x000001) {
1353 if (!st->nb_frames) {
1354 av_log(s, AV_LOG_ERROR, "H.264 bitstream malformed, "
1355 "no startcode found, use the video bitstream filter 'h264_mp4toannexb' to fix it "
1356 "('-bsf:v h264_mp4toannexb' option with ffmpeg)\n");
1357 return AVERROR_INVALIDDATA;
1359 av_log(s, AV_LOG_WARNING, "H.264 bitstream error, startcode missing, size %d", pkt->size);
1360 if (pkt->size) av_log(s, AV_LOG_WARNING, " data %08X", AV_RB32(pkt->data));
1361 av_log(s, AV_LOG_WARNING, "\n");
1366 static int check_hevc_startcode(AVFormatContext *s, const AVStream *st, const AVPacket *pkt)
1368 if (pkt->size < 5 || AV_RB32(pkt->data) != 0x0000001 && AV_RB24(pkt->data) != 0x000001) {
1369 if (!st->nb_frames) {
1370 av_log(s, AV_LOG_ERROR, "HEVC bitstream malformed, no startcode found\n");
1371 return AVERROR_PATCHWELCOME;
1373 av_log(s, AV_LOG_WARNING, "HEVC bitstream error, startcode missing, size %d", pkt->size);
1374 if (pkt->size) av_log(s, AV_LOG_WARNING, " data %08X", AV_RB32(pkt->data));
1375 av_log(s, AV_LOG_WARNING, "\n");
1380 /* Based on GStreamer's gst-plugins-base/ext/ogg/gstoggstream.c
1381 * Released under the LGPL v2.1+, written by
1382 * Vincent Penquerc'h <vincent.penquerch@collabora.co.uk>
1384 static int opus_get_packet_samples(AVFormatContext *s, AVPacket *pkt)
1386 static const int durations[32] = {
1387 480, 960, 1920, 2880, /* Silk NB */
1388 480, 960, 1920, 2880, /* Silk MB */
1389 480, 960, 1920, 2880, /* Silk WB */
1390 480, 960, /* Hybrid SWB */
1391 480, 960, /* Hybrid FB */
1392 120, 240, 480, 960, /* CELT NB */
1393 120, 240, 480, 960, /* CELT NB */
1394 120, 240, 480, 960, /* CELT NB */
1395 120, 240, 480, 960, /* CELT NB */
1397 int toc, frame_duration, nframes, duration;
1404 frame_duration = durations[toc >> 3];
1418 nframes = pkt->data[1] & 63;
1422 duration = nframes * frame_duration;
1423 if (duration > 5760) {
1424 av_log(s, AV_LOG_WARNING,
1425 "Opus packet duration > 120 ms, invalid");
1432 static int mpegts_write_packet_internal(AVFormatContext *s, AVPacket *pkt)
1434 AVStream *st = s->streams[pkt->stream_index];
1435 int size = pkt->size;
1436 uint8_t *buf = pkt->data;
1437 uint8_t *data = NULL;
1438 MpegTSWrite *ts = s->priv_data;
1439 MpegTSWriteStream *ts_st = st->priv_data;
1440 const int64_t delay = av_rescale(s->max_delay, 90000, AV_TIME_BASE) * 2;
1441 int64_t dts = pkt->dts, pts = pkt->pts;
1442 int opus_samples = 0;
1444 if (ts->reemit_pat_pmt) {
1445 av_log(s, AV_LOG_WARNING,
1446 "resend_headers option is deprecated, use -mpegts_flags resend_headers\n");
1447 ts->reemit_pat_pmt = 0;
1448 ts->flags |= MPEGTS_FLAG_REEMIT_PAT_PMT;
1451 if (ts->flags & MPEGTS_FLAG_REEMIT_PAT_PMT) {
1452 ts->pat_packet_count = ts->pat_packet_period - 1;
1453 ts->sdt_packet_count = ts->sdt_packet_period - 1;
1454 ts->flags &= ~MPEGTS_FLAG_REEMIT_PAT_PMT;
1457 if (ts->copyts < 1) {
1458 if (pts != AV_NOPTS_VALUE)
1460 if (dts != AV_NOPTS_VALUE)
1464 if (ts_st->first_pts_check && pts == AV_NOPTS_VALUE) {
1465 av_log(s, AV_LOG_ERROR, "first pts value must be set\n");
1466 return AVERROR_INVALIDDATA;
1468 ts_st->first_pts_check = 0;
1470 if (st->codec->codec_id == AV_CODEC_ID_H264) {
1471 const uint8_t *p = buf, *buf_end = p + size;
1472 uint32_t state = -1;
1473 int extradd = (pkt->flags & AV_PKT_FLAG_KEY) ? st->codec->extradata_size : 0;
1474 int ret = ff_check_h264_startcode(s, st, pkt);
1478 if (extradd && AV_RB24(st->codec->extradata) > 1)
1482 p = avpriv_find_start_code(p, buf_end, &state);
1483 av_log(s, AV_LOG_TRACE, "nal %d\n", state & 0x1f);
1484 if ((state & 0x1f) == 7)
1486 } while (p < buf_end && (state & 0x1f) != 9 &&
1487 (state & 0x1f) != 5 && (state & 0x1f) != 1);
1489 if ((state & 0x1f) != 5)
1491 if ((state & 0x1f) != 9) { // AUD NAL
1492 data = av_malloc(pkt->size + 6 + extradd);
1494 return AVERROR(ENOMEM);
1495 memcpy(data + 6, st->codec->extradata, extradd);
1496 memcpy(data + 6 + extradd, pkt->data, pkt->size);
1497 AV_WB32(data, 0x00000001);
1499 data[5] = 0xf0; // any slice type (0xe) + rbsp stop one bit
1501 size = pkt->size + 6 + extradd;
1503 } else if (st->codec->codec_id == AV_CODEC_ID_AAC) {
1504 if (pkt->size < 2) {
1505 av_log(s, AV_LOG_ERROR, "AAC packet too short\n");
1506 return AVERROR_INVALIDDATA;
1508 if ((AV_RB16(pkt->data) & 0xfff0) != 0xfff0) {
1513 av_log(s, AV_LOG_ERROR, "AAC bitstream not in ADTS format "
1514 "and extradata missing\n");
1516 return AVERROR_INVALIDDATA;
1518 av_init_packet(&pkt2);
1519 pkt2.data = pkt->data;
1520 pkt2.size = pkt->size;
1521 av_assert0(pkt->dts != AV_NOPTS_VALUE);
1522 pkt2.dts = av_rescale_q(pkt->dts, st->time_base, ts_st->amux->streams[0]->time_base);
1524 ret = avio_open_dyn_buf(&ts_st->amux->pb);
1526 return AVERROR(ENOMEM);
1528 ret = av_write_frame(ts_st->amux, &pkt2);
1530 ffio_free_dyn_buf(&ts_st->amux->pb);
1533 size = avio_close_dyn_buf(ts_st->amux->pb, &data);
1534 ts_st->amux->pb = NULL;
1538 } else if (st->codec->codec_id == AV_CODEC_ID_HEVC) {
1539 int ret = check_hevc_startcode(s, st, pkt);
1542 } else if (st->codec->codec_id == AV_CODEC_ID_OPUS) {
1543 if (pkt->size < 2) {
1544 av_log(s, AV_LOG_ERROR, "Opus packet too short\n");
1545 return AVERROR_INVALIDDATA;
1548 /* Add Opus control header */
1549 if ((AV_RB16(pkt->data) >> 5) != 0x3ff) {
1553 int ctrl_header_size;
1554 int trim_start = 0, trim_end = 0;
1556 opus_samples = opus_get_packet_samples(s, pkt);
1558 side_data = av_packet_get_side_data(pkt,
1559 AV_PKT_DATA_SKIP_SAMPLES,
1562 if (side_data && side_data_size >= 10) {
1563 trim_end = AV_RL32(side_data + 4) * 48000 / st->codec->sample_rate;
1566 ctrl_header_size = pkt->size + 2 + pkt->size / 255 + 1;
1567 if (ts_st->opus_pending_trim_start)
1568 ctrl_header_size += 2;
1570 ctrl_header_size += 2;
1572 data = av_malloc(ctrl_header_size);
1574 return AVERROR(ENOMEM);
1578 if (ts_st->opus_pending_trim_start)
1586 data[i] = FFMIN(n, 255);
1591 av_assert0(2 + pkt->size / 255 + 1 == i);
1593 if (ts_st->opus_pending_trim_start) {
1594 trim_start = FFMIN(ts_st->opus_pending_trim_start, opus_samples);
1595 AV_WB16(data + i, trim_start);
1597 ts_st->opus_pending_trim_start -= trim_start;
1600 trim_end = FFMIN(trim_end, opus_samples - trim_start);
1601 AV_WB16(data + i, trim_end);
1605 memcpy(data + i, pkt->data, pkt->size);
1607 size = ctrl_header_size;
1609 /* TODO: Can we get TS formatted data here? If so we will
1610 * need to count the samples of that too! */
1611 av_log(s, AV_LOG_WARNING, "Got MPEG-TS formatted Opus data, unhandled");
1615 if (pkt->dts != AV_NOPTS_VALUE) {
1617 for(i=0; i<s->nb_streams; i++) {
1618 AVStream *st2 = s->streams[i];
1619 MpegTSWriteStream *ts_st2 = st2->priv_data;
1620 if ( ts_st2->payload_size
1621 && (ts_st2->payload_dts == AV_NOPTS_VALUE || dts - ts_st2->payload_dts > delay/2)) {
1622 mpegts_write_pes(s, st2, ts_st2->payload, ts_st2->payload_size,
1623 ts_st2->payload_pts, ts_st2->payload_dts,
1624 ts_st2->payload_flags & AV_PKT_FLAG_KEY);
1625 ts_st2->payload_size = 0;
1630 if (ts_st->payload_size && (ts_st->payload_size + size > ts->pes_payload_size ||
1631 (dts != AV_NOPTS_VALUE && ts_st->payload_dts != AV_NOPTS_VALUE &&
1632 av_compare_ts(dts - ts_st->payload_dts, st->time_base,
1633 s->max_delay, AV_TIME_BASE_Q) >= 0) ||
1634 ts_st->opus_queued_samples + opus_samples >= 5760 /* 120ms */)) {
1635 mpegts_write_pes(s, st, ts_st->payload, ts_st->payload_size,
1636 ts_st->payload_pts, ts_st->payload_dts,
1637 ts_st->payload_flags & AV_PKT_FLAG_KEY);
1638 ts_st->payload_size = 0;
1639 ts_st->opus_queued_samples = 0;
1642 if (st->codec->codec_type != AVMEDIA_TYPE_AUDIO || size > ts->pes_payload_size) {
1643 av_assert0(!ts_st->payload_size);
1644 // for video and subtitle, write a single pes packet
1645 mpegts_write_pes(s, st, buf, size, pts, dts,
1646 pkt->flags & AV_PKT_FLAG_KEY);
1647 ts_st->opus_queued_samples = 0;
1652 if (!ts_st->payload_size) {
1653 ts_st->payload_pts = pts;
1654 ts_st->payload_dts = dts;
1655 ts_st->payload_flags = pkt->flags;
1658 memcpy(ts_st->payload + ts_st->payload_size, buf, size);
1659 ts_st->payload_size += size;
1660 ts_st->opus_queued_samples += opus_samples;
1667 static void mpegts_write_flush(AVFormatContext *s)
1671 /* flush current packets */
1672 for (i = 0; i < s->nb_streams; i++) {
1673 AVStream *st = s->streams[i];
1674 MpegTSWriteStream *ts_st = st->priv_data;
1675 if (ts_st->payload_size > 0) {
1676 mpegts_write_pes(s, st, ts_st->payload, ts_st->payload_size,
1677 ts_st->payload_pts, ts_st->payload_dts,
1678 ts_st->payload_flags & AV_PKT_FLAG_KEY);
1679 ts_st->payload_size = 0;
1680 ts_st->opus_queued_samples = 0;
1685 static int mpegts_write_packet(AVFormatContext *s, AVPacket *pkt)
1688 mpegts_write_flush(s);
1691 return mpegts_write_packet_internal(s, pkt);
1695 static int mpegts_write_end(AVFormatContext *s)
1698 mpegts_write_flush(s);
1703 static void mpegts_deinit(AVFormatContext *s)
1705 MpegTSWrite *ts = s->priv_data;
1706 MpegTSService *service;
1709 for (i = 0; i < s->nb_streams; i++) {
1710 AVStream *st = s->streams[i];
1711 MpegTSWriteStream *ts_st = st->priv_data;
1713 av_freep(&ts_st->payload);
1715 avformat_free_context(ts_st->amux);
1721 for (i = 0; i < ts->nb_services; i++) {
1722 service = ts->services[i];
1723 av_freep(&service->provider_name);
1724 av_freep(&service->name);
1727 av_freep(&ts->services);
1730 static int mpegts_check_bitstream(struct AVFormatContext *s, const AVPacket *pkt)
1733 AVStream *st = s->streams[pkt->stream_index];
1735 if (st->codec->codec_id == AV_CODEC_ID_H264) {
1736 if (pkt->size >= 5 && AV_RB32(pkt->data) != 0x0000001 &&
1737 AV_RB24(pkt->data) != 0x000001)
1738 ret = ff_stream_add_bitstream_filter(st, "h264_mp4toannexb", NULL);
1739 } else if (st->codec->codec_id == AV_CODEC_ID_HEVC) {
1740 if (pkt->size >= 5 && AV_RB32(pkt->data) != 0x0000001 &&
1741 AV_RB24(pkt->data) != 0x000001)
1742 ret = ff_stream_add_bitstream_filter(st, "hevc_mp4toannexb", NULL);
1748 static const AVOption options[] = {
1749 { "mpegts_transport_stream_id", "Set transport_stream_id field.",
1750 offsetof(MpegTSWrite, transport_stream_id), AV_OPT_TYPE_INT,
1751 { .i64 = 0x0001 }, 0x0001, 0xffff, AV_OPT_FLAG_ENCODING_PARAM },
1752 { "mpegts_original_network_id", "Set original_network_id field.",
1753 offsetof(MpegTSWrite, original_network_id), AV_OPT_TYPE_INT,
1754 { .i64 = 0x0001 }, 0x0001, 0xffff, AV_OPT_FLAG_ENCODING_PARAM },
1755 { "mpegts_service_id", "Set service_id field.",
1756 offsetof(MpegTSWrite, service_id), AV_OPT_TYPE_INT,
1757 { .i64 = 0x0001 }, 0x0001, 0xffff, AV_OPT_FLAG_ENCODING_PARAM },
1758 { "mpegts_service_type", "Set service_type field.",
1759 offsetof(MpegTSWrite, service_type), AV_OPT_TYPE_INT,
1760 { .i64 = 0x01 }, 0x01, 0xff, AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
1761 { "digital_tv", "Digital Television.",
1762 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_DIGITAL_TV }, 0x01, 0xff,
1763 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
1764 { "digital_radio", "Digital Radio.",
1765 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_DIGITAL_RADIO }, 0x01, 0xff,
1766 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
1767 { "teletext", "Teletext.",
1768 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_TELETEXT }, 0x01, 0xff,
1769 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
1770 { "advanced_codec_digital_radio", "Advanced Codec Digital Radio.",
1771 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_ADVANCED_CODEC_DIGITAL_RADIO }, 0x01, 0xff,
1772 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
1773 { "mpeg2_digital_hdtv", "MPEG2 Digital HDTV.",
1774 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_MPEG2_DIGITAL_HDTV }, 0x01, 0xff,
1775 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
1776 { "advanced_codec_digital_sdtv", "Advanced Codec Digital SDTV.",
1777 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_ADVANCED_CODEC_DIGITAL_SDTV }, 0x01, 0xff,
1778 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
1779 { "advanced_codec_digital_hdtv", "Advanced Codec Digital HDTV.",
1780 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_ADVANCED_CODEC_DIGITAL_HDTV }, 0x01, 0xff,
1781 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
1782 { "mpegts_pmt_start_pid", "Set the first pid of the PMT.",
1783 offsetof(MpegTSWrite, pmt_start_pid), AV_OPT_TYPE_INT,
1784 { .i64 = 0x1000 }, 0x0010, 0x1f00, AV_OPT_FLAG_ENCODING_PARAM },
1785 { "mpegts_start_pid", "Set the first pid.",
1786 offsetof(MpegTSWrite, start_pid), AV_OPT_TYPE_INT,
1787 { .i64 = 0x0100 }, 0x0020, 0x0f00, AV_OPT_FLAG_ENCODING_PARAM },
1788 { "mpegts_m2ts_mode", "Enable m2ts mode.",
1789 offsetof(MpegTSWrite, m2ts_mode), AV_OPT_TYPE_BOOL,
1790 { .i64 = -1 }, -1, 1, AV_OPT_FLAG_ENCODING_PARAM },
1792 offsetof(MpegTSWrite, mux_rate), AV_OPT_TYPE_INT,
1793 { .i64 = 1 }, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
1794 { "pes_payload_size", "Minimum PES packet payload in bytes",
1795 offsetof(MpegTSWrite, pes_payload_size), AV_OPT_TYPE_INT,
1796 { .i64 = DEFAULT_PES_PAYLOAD_SIZE }, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
1797 { "mpegts_flags", "MPEG-TS muxing flags",
1798 offsetof(MpegTSWrite, flags), AV_OPT_TYPE_FLAGS, { .i64 = 0 }, 0, INT_MAX,
1799 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_flags" },
1800 { "resend_headers", "Reemit PAT/PMT before writing the next packet",
1801 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_FLAG_REEMIT_PAT_PMT }, 0, INT_MAX,
1802 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_flags" },
1803 { "latm", "Use LATM packetization for AAC",
1804 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_FLAG_AAC_LATM }, 0, INT_MAX,
1805 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_flags" },
1806 { "pat_pmt_at_frames", "Reemit PAT and PMT at each video frame",
1807 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_FLAG_PAT_PMT_AT_FRAMES}, 0, INT_MAX,
1808 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_flags" },
1809 { "system_b", "Conform to System B (DVB) instead of System A (ATSC)",
1810 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_FLAG_SYSTEM_B }, 0, INT_MAX,
1811 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_flags" },
1812 // backward compatibility
1813 { "resend_headers", "Reemit PAT/PMT before writing the next packet",
1814 offsetof(MpegTSWrite, reemit_pat_pmt), AV_OPT_TYPE_INT,
1815 { .i64 = 0 }, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
1816 { "mpegts_copyts", "don't offset dts/pts",
1817 offsetof(MpegTSWrite, copyts), AV_OPT_TYPE_BOOL,
1818 { .i64 = -1 }, -1, 1, AV_OPT_FLAG_ENCODING_PARAM },
1819 { "tables_version", "set PAT, PMT and SDT version",
1820 offsetof(MpegTSWrite, tables_version), AV_OPT_TYPE_INT,
1821 { .i64 = 0 }, 0, 31, AV_OPT_FLAG_ENCODING_PARAM },
1822 { "omit_video_pes_length", "Omit the PES packet length for video packets",
1823 offsetof(MpegTSWrite, omit_video_pes_length), AV_OPT_TYPE_BOOL,
1824 { .i64 = 1 }, 0, 1, AV_OPT_FLAG_ENCODING_PARAM },
1825 { "pcr_period", "PCR retransmission time",
1826 offsetof(MpegTSWrite, pcr_period), AV_OPT_TYPE_INT,
1827 { .i64 = PCR_RETRANS_TIME }, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
1828 { "pat_period", "PAT/PMT retransmission time limit in seconds",
1829 offsetof(MpegTSWrite, pat_period), AV_OPT_TYPE_DOUBLE,
1830 { .dbl = INT_MAX }, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
1831 { "sdt_period", "SDT retransmission time limit in seconds",
1832 offsetof(MpegTSWrite, sdt_period), AV_OPT_TYPE_DOUBLE,
1833 { .dbl = INT_MAX }, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
1837 static const AVClass mpegts_muxer_class = {
1838 .class_name = "MPEGTS muxer",
1839 .item_name = av_default_item_name,
1841 .version = LIBAVUTIL_VERSION_INT,
1844 AVOutputFormat ff_mpegts_muxer = {
1846 .long_name = NULL_IF_CONFIG_SMALL("MPEG-TS (MPEG-2 Transport Stream)"),
1847 .mime_type = "video/MP2T",
1848 .extensions = "ts,m2t,m2ts,mts",
1849 .priv_data_size = sizeof(MpegTSWrite),
1850 .audio_codec = AV_CODEC_ID_MP2,
1851 .video_codec = AV_CODEC_ID_MPEG2VIDEO,
1852 .init = mpegts_init,
1853 .write_packet = mpegts_write_packet,
1854 .write_trailer = mpegts_write_end,
1855 .deinit = mpegts_deinit,
1856 .check_bitstream = mpegts_check_bitstream,
1857 .flags = AVFMT_ALLOW_FLUSH | AVFMT_VARIABLE_FPS,
1858 .priv_class = &mpegts_muxer_class,