2 * MPEG-2 transport stream (aka DVB) muxer
3 * Copyright (c) 2003 Fabrice Bellard
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 #include "libavutil/avassert.h"
23 #include "libavutil/bswap.h"
24 #include "libavutil/crc.h"
25 #include "libavutil/dict.h"
26 #include "libavutil/intreadwrite.h"
27 #include "libavutil/mathematics.h"
28 #include "libavutil/opt.h"
30 #include "libavcodec/internal.h"
33 #include "avio_internal.h"
37 #define PCR_TIME_BASE 27000000
39 /* write DVB SI sections */
41 #define DVB_PRIVATE_NETWORK_START 0xff01
43 /*********************************************/
44 /* mpegts section writer */
46 typedef struct MpegTSSection {
50 void (*write_packet)(struct MpegTSSection *s, const uint8_t *packet);
54 typedef struct MpegTSService {
55 MpegTSSection pmt; /* MPEG-2 PMT table context */
56 int sid; /* service ID */
58 uint8_t provider_name[256];
63 // service_type values as defined in ETSI 300 468
65 MPEGTS_SERVICE_TYPE_DIGITAL_TV = 0x01,
66 MPEGTS_SERVICE_TYPE_DIGITAL_RADIO = 0x02,
67 MPEGTS_SERVICE_TYPE_TELETEXT = 0x03,
68 MPEGTS_SERVICE_TYPE_ADVANCED_CODEC_DIGITAL_RADIO = 0x0A,
69 MPEGTS_SERVICE_TYPE_MPEG2_DIGITAL_HDTV = 0x11,
70 MPEGTS_SERVICE_TYPE_ADVANCED_CODEC_DIGITAL_SDTV = 0x16,
71 MPEGTS_SERVICE_TYPE_ADVANCED_CODEC_DIGITAL_HDTV = 0x19,
72 MPEGTS_SERVICE_TYPE_HEVC_DIGITAL_HDTV = 0x1F,
74 typedef struct MpegTSWrite {
75 const AVClass *av_class;
76 MpegTSSection pat; /* MPEG-2 PAT table */
77 MpegTSSection sdt; /* MPEG-2 SDT table context */
78 MpegTSService **services;
80 int sdt_packet_period;
82 int pat_packet_period;
87 int mux_rate; ///< set to 1 when VBR
90 int transport_stream_id;
91 int original_network_id;
99 int reemit_pat_pmt; // backward compatibility
102 #define MPEGTS_FLAG_REEMIT_PAT_PMT 0x01
103 #define MPEGTS_FLAG_AAC_LATM 0x02
104 #define MPEGTS_FLAG_PAT_PMT_AT_FRAMES 0x04
105 #define MPEGTS_FLAG_SYSTEM_B 0x08
106 #define MPEGTS_FLAG_DISCONT 0x10
115 int omit_video_pes_length;
118 /* a PES packet header is generated every DEFAULT_PES_HEADER_FREQ packets */
119 #define DEFAULT_PES_HEADER_FREQ 16
120 #define DEFAULT_PES_PAYLOAD_SIZE ((DEFAULT_PES_HEADER_FREQ - 1) * 184 + 170)
122 /* The section length is 12 bits. The first 2 are set to 0, the remaining
123 * 10 bits should not exceed 1021. */
124 #define SECTION_LENGTH 1020
126 /* NOTE: 4 bytes must be left at the end for the crc32 */
127 static void mpegts_write_section(MpegTSSection *s, uint8_t *buf, int len)
130 unsigned char packet[TS_PACKET_SIZE];
131 const unsigned char *buf_ptr;
133 int first, b, len1, left;
135 crc = av_bswap32(av_crc(av_crc_get_table(AV_CRC_32_IEEE),
138 buf[len - 4] = (crc >> 24) & 0xff;
139 buf[len - 3] = (crc >> 16) & 0xff;
140 buf[len - 2] = (crc >> 8) & 0xff;
141 buf[len - 1] = crc & 0xff;
143 /* send each packet */
146 first = buf == buf_ptr;
154 s->cc = s->cc + 1 & 0xf;
156 if (s->discontinuity) {
160 s->discontinuity = 0;
163 *q++ = 0; /* 0 offset */
164 len1 = TS_PACKET_SIZE - (q - packet);
167 memcpy(q, buf_ptr, len1);
169 /* add known padding data */
170 left = TS_PACKET_SIZE - (q - packet);
172 memset(q, 0xff, left);
174 s->write_packet(s, packet);
181 static inline void put16(uint8_t **q_ptr, int val)
190 static int mpegts_write_section1(MpegTSSection *s, int tid, int id,
191 int version, int sec_num, int last_sec_num,
192 uint8_t *buf, int len)
194 uint8_t section[1024], *q;
195 unsigned int tot_len;
196 /* reserved_future_use field must be set to 1 for SDT */
197 unsigned int flags = tid == SDT_TID ? 0xf000 : 0xb000;
199 tot_len = 3 + 5 + len + 4;
200 /* check if not too big */
202 return AVERROR_INVALIDDATA;
206 put16(&q, flags | (len + 5 + 4)); /* 5 byte header + 4 byte CRC */
208 *q++ = 0xc1 | (version << 1); /* current_next_indicator = 1 */
213 mpegts_write_section(s, section, tot_len);
217 /*********************************************/
220 #define DEFAULT_PROVIDER_NAME "FFmpeg"
221 #define DEFAULT_SERVICE_NAME "Service01"
223 /* we retransmit the SI info at this rate */
224 #define SDT_RETRANS_TIME 500
225 #define PAT_RETRANS_TIME 100
226 #define PCR_RETRANS_TIME 20
228 typedef struct MpegTSWriteStream {
229 int pid; /* stream associated pid */
233 int first_pts_check; ///< first pts check needed
234 int prev_payload_key;
239 AVFormatContext *amux;
242 int pcr_packet_count;
243 int pcr_packet_period;
246 int opus_queued_samples;
247 int opus_pending_trim_start;
250 static void mpegts_write_pat(AVFormatContext *s)
252 MpegTSWrite *ts = s->priv_data;
253 MpegTSService *service;
254 uint8_t data[SECTION_LENGTH], *q;
258 for (i = 0; i < ts->nb_services; i++) {
259 service = ts->services[i];
260 put16(&q, service->sid);
261 put16(&q, 0xe000 | service->pmt.pid);
263 mpegts_write_section1(&ts->pat, PAT_TID, ts->tsid, ts->tables_version, 0, 0,
267 static void putbuf(uint8_t **q_ptr, const uint8_t *buf, size_t len)
269 memcpy(*q_ptr, buf, len);
273 static void put_registration_descriptor(uint8_t **q_ptr, uint32_t tag)
276 *q++ = 0x05; /* MPEG-2 registration descriptor*/
285 static int mpegts_write_pmt(AVFormatContext *s, MpegTSService *service)
287 MpegTSWrite *ts = s->priv_data;
288 uint8_t data[SECTION_LENGTH], *q, *desc_length_ptr, *program_info_length_ptr;
289 int val, stream_type, i, err = 0;
292 put16(&q, 0xe000 | service->pcr_pid);
294 program_info_length_ptr = q;
295 q += 2; /* patched after */
297 /* put program info here */
299 val = 0xf000 | (q - program_info_length_ptr - 2);
300 program_info_length_ptr[0] = val >> 8;
301 program_info_length_ptr[1] = val;
303 for (i = 0; i < s->nb_streams; i++) {
304 AVStream *st = s->streams[i];
305 MpegTSWriteStream *ts_st = st->priv_data;
306 AVDictionaryEntry *lang = av_dict_get(st->metadata, "language", NULL, 0);
308 if (s->nb_programs) {
310 AVProgram *program = service->program;
312 for (k = 0; k < program->nb_stream_indexes; k++)
313 if (program->stream_index[k] == i) {
322 if (q - data > SECTION_LENGTH - 32) {
326 switch (st->codecpar->codec_id) {
327 case AV_CODEC_ID_MPEG1VIDEO:
328 case AV_CODEC_ID_MPEG2VIDEO:
329 stream_type = STREAM_TYPE_VIDEO_MPEG2;
331 case AV_CODEC_ID_MPEG4:
332 stream_type = STREAM_TYPE_VIDEO_MPEG4;
334 case AV_CODEC_ID_H264:
335 stream_type = STREAM_TYPE_VIDEO_H264;
337 case AV_CODEC_ID_HEVC:
338 stream_type = STREAM_TYPE_VIDEO_HEVC;
340 case AV_CODEC_ID_CAVS:
341 stream_type = STREAM_TYPE_VIDEO_CAVS;
343 case AV_CODEC_ID_DIRAC:
344 stream_type = STREAM_TYPE_VIDEO_DIRAC;
346 case AV_CODEC_ID_VC1:
347 stream_type = STREAM_TYPE_VIDEO_VC1;
349 case AV_CODEC_ID_MP2:
350 case AV_CODEC_ID_MP3:
351 if ( st->codecpar->sample_rate > 0
352 && st->codecpar->sample_rate < 32000) {
353 stream_type = STREAM_TYPE_AUDIO_MPEG2;
355 stream_type = STREAM_TYPE_AUDIO_MPEG1;
358 case AV_CODEC_ID_AAC:
359 stream_type = (ts->flags & MPEGTS_FLAG_AAC_LATM)
360 ? STREAM_TYPE_AUDIO_AAC_LATM
361 : STREAM_TYPE_AUDIO_AAC;
363 case AV_CODEC_ID_AAC_LATM:
364 stream_type = STREAM_TYPE_AUDIO_AAC_LATM;
366 case AV_CODEC_ID_AC3:
367 stream_type = (ts->flags & MPEGTS_FLAG_SYSTEM_B)
368 ? STREAM_TYPE_PRIVATE_DATA
369 : STREAM_TYPE_AUDIO_AC3;
371 case AV_CODEC_ID_EAC3:
372 stream_type = (ts->flags & MPEGTS_FLAG_SYSTEM_B)
373 ? STREAM_TYPE_PRIVATE_DATA
374 : STREAM_TYPE_AUDIO_EAC3;
376 case AV_CODEC_ID_DTS:
377 stream_type = STREAM_TYPE_AUDIO_DTS;
379 case AV_CODEC_ID_TRUEHD:
380 stream_type = STREAM_TYPE_AUDIO_TRUEHD;
382 case AV_CODEC_ID_OPUS:
383 stream_type = STREAM_TYPE_PRIVATE_DATA;
385 case AV_CODEC_ID_TIMED_ID3:
386 stream_type = STREAM_TYPE_METADATA;
389 stream_type = STREAM_TYPE_PRIVATE_DATA;
394 put16(&q, 0xe000 | ts_st->pid);
396 q += 2; /* patched after */
398 /* write optional descriptors here */
399 switch (st->codecpar->codec_type) {
400 case AVMEDIA_TYPE_AUDIO:
401 if (st->codecpar->codec_id==AV_CODEC_ID_AC3 && (ts->flags & MPEGTS_FLAG_SYSTEM_B)) {
402 *q++=0x6a; // AC3 descriptor see A038 DVB SI
403 *q++=1; // 1 byte, all flags sets to 0
404 *q++=0; // omit all fields...
406 if (st->codecpar->codec_id==AV_CODEC_ID_EAC3 && (ts->flags & MPEGTS_FLAG_SYSTEM_B)) {
407 *q++=0x7a; // EAC3 descriptor see A038 DVB SI
408 *q++=1; // 1 byte, all flags sets to 0
409 *q++=0; // omit all fields...
411 if (st->codecpar->codec_id==AV_CODEC_ID_S302M)
412 put_registration_descriptor(&q, MKTAG('B', 'S', 'S', 'D'));
413 if (st->codecpar->codec_id==AV_CODEC_ID_OPUS) {
414 /* 6 bytes registration descriptor, 4 bytes Opus audio descriptor */
415 if (q - data > SECTION_LENGTH - 6 - 4) {
420 put_registration_descriptor(&q, MKTAG('O', 'p', 'u', 's'));
422 *q++ = 0x7f; /* DVB extension descriptor */
426 if (st->codecpar->extradata && st->codecpar->extradata_size >= 19) {
427 if (st->codecpar->extradata[18] == 0 && st->codecpar->channels <= 2) {
428 /* RTP mapping family */
429 *q++ = st->codecpar->channels;
430 } else if (st->codecpar->extradata[18] == 1 && st->codecpar->channels <= 8 &&
431 st->codecpar->extradata_size >= 21 + st->codecpar->channels) {
432 static const uint8_t coupled_stream_counts[9] = {
433 1, 0, 1, 1, 2, 2, 2, 3, 3
435 static const uint8_t channel_map_a[8][8] = {
442 {0, 4, 1, 2, 3, 5, 6},
443 {0, 6, 1, 2, 3, 4, 5, 7},
445 static const uint8_t channel_map_b[8][8] = {
452 {0, 1, 2, 3, 4, 5, 6},
453 {0, 1, 2, 3, 4, 5, 6, 7},
455 /* Vorbis mapping family */
457 if (st->codecpar->extradata[19] == st->codecpar->channels - coupled_stream_counts[st->codecpar->channels] &&
458 st->codecpar->extradata[20] == coupled_stream_counts[st->codecpar->channels] &&
459 memcmp(&st->codecpar->extradata[21], channel_map_a[st->codecpar->channels-1], st->codecpar->channels) == 0) {
460 *q++ = st->codecpar->channels;
461 } else if (st->codecpar->channels >= 2 && st->codecpar->extradata[19] == st->codecpar->channels &&
462 st->codecpar->extradata[20] == 0 &&
463 memcmp(&st->codecpar->extradata[21], channel_map_b[st->codecpar->channels-1], st->codecpar->channels) == 0) {
464 *q++ = st->codecpar->channels | 0x80;
466 /* Unsupported, could write an extended descriptor here */
467 av_log(s, AV_LOG_ERROR, "Unsupported Opus Vorbis-style channel mapping");
472 av_log(s, AV_LOG_ERROR, "Unsupported Opus channel mapping for family %d", st->codecpar->extradata[18]);
475 } else if (st->codecpar->channels <= 2) {
476 /* Assume RTP mapping family */
477 *q++ = st->codecpar->channels;
480 av_log(s, AV_LOG_ERROR, "Unsupported Opus channel mapping");
487 char *next = lang->value;
490 *q++ = 0x0a; /* ISO 639 language descriptor */
494 for (p = lang->value; next && *len_ptr < 255 / 4 * 4; p = next + 1) {
495 if (q - data > SECTION_LENGTH - 4) {
499 next = strchr(p, ',');
500 if (strlen(p) != 3 && (!next || next != p + 3))
501 continue; /* not a 3-letter code */
507 if (st->disposition & AV_DISPOSITION_CLEAN_EFFECTS)
509 else if (st->disposition & AV_DISPOSITION_HEARING_IMPAIRED)
511 else if (st->disposition & AV_DISPOSITION_VISUAL_IMPAIRED)
514 *q++ = 0; /* undefined type */
520 q -= 2; /* no language codes were written */
523 case AVMEDIA_TYPE_SUBTITLE:
525 const char default_language[] = "und";
526 const char *language = lang && strlen(lang->value) >= 3 ? lang->value : default_language;
528 if (st->codecpar->codec_id == AV_CODEC_ID_DVB_SUBTITLE) {
530 int extradata_copied = 0;
532 *q++ = 0x59; /* subtitling_descriptor */
535 while (strlen(language) >= 3) {
536 if (sizeof(data) - (q - data) < 8) { /* 8 bytes per DVB subtitle substream data */
544 if (*language != '\0')
547 if (st->codecpar->extradata_size - extradata_copied >= 5) {
548 *q++ = st->codecpar->extradata[extradata_copied + 4]; /* subtitling_type */
549 memcpy(q, st->codecpar->extradata + extradata_copied, 4); /* composition_page_id and ancillary_page_id */
550 extradata_copied += 5;
554 * 0x10 - normal with no monitor aspect ratio criticality
555 * 0x20 - for the hard of hearing with no monitor aspect ratio criticality */
556 *q++ = (st->disposition & AV_DISPOSITION_HEARING_IMPAIRED) ? 0x20 : 0x10;
557 if ((st->codecpar->extradata_size == 4) && (extradata_copied == 0)) {
558 /* support of old 4-byte extradata format */
559 memcpy(q, st->codecpar->extradata, 4); /* composition_page_id and ancillary_page_id */
560 extradata_copied += 4;
563 put16(&q, 1); /* composition_page_id */
564 put16(&q, 1); /* ancillary_page_id */
569 *len_ptr = q - len_ptr - 1;
570 } else if (st->codecpar->codec_id == AV_CODEC_ID_DVB_TELETEXT) {
571 uint8_t *len_ptr = NULL;
572 int extradata_copied = 0;
574 /* The descriptor tag. teletext_descriptor */
578 while (strlen(language) >= 3 && q - data < sizeof(data) - 6) {
583 if (*language != '\0')
586 if (st->codecpar->extradata_size - 1 > extradata_copied) {
587 memcpy(q, st->codecpar->extradata + extradata_copied, 2);
588 extradata_copied += 2;
591 /* The Teletext descriptor:
592 * teletext_type: This 5-bit field indicates the type of Teletext page indicated. (0x01 Initial Teletext page)
593 * teletext_magazine_number: This is a 3-bit field which identifies the magazine number.
594 * teletext_page_number: This is an 8-bit field giving two 4-bit hex digits identifying the page number. */
600 *len_ptr = q - len_ptr - 1;
604 case AVMEDIA_TYPE_VIDEO:
605 if (stream_type == STREAM_TYPE_VIDEO_DIRAC) {
606 put_registration_descriptor(&q, MKTAG('d', 'r', 'a', 'c'));
607 } else if (stream_type == STREAM_TYPE_VIDEO_VC1) {
608 put_registration_descriptor(&q, MKTAG('V', 'C', '-', '1'));
609 } else if (stream_type == STREAM_TYPE_VIDEO_HEVC && s->strict_std_compliance <= FF_COMPLIANCE_NORMAL) {
610 put_registration_descriptor(&q, MKTAG('H', 'E', 'V', 'C'));
613 case AVMEDIA_TYPE_DATA:
614 if (st->codecpar->codec_id == AV_CODEC_ID_SMPTE_KLV) {
615 put_registration_descriptor(&q, MKTAG('K', 'L', 'V', 'A'));
616 } else if (st->codecpar->codec_id == AV_CODEC_ID_TIMED_ID3) {
617 const char *tag = "ID3 ";
618 *q++ = 0x26; /* metadata descriptor */
620 put16(&q, 0xffff); /* metadata application format */
621 putbuf(&q, tag, strlen(tag));
622 *q++ = 0xff; /* metadata format */
623 putbuf(&q, tag, strlen(tag));
624 *q++ = 0; /* metadata service ID */
625 *q++ = 0xF; /* metadata_locator_record_flag|MPEG_carriage_flags|reserved */
630 val = 0xf000 | (q - desc_length_ptr - 2);
631 desc_length_ptr[0] = val >> 8;
632 desc_length_ptr[1] = val;
636 av_log(s, AV_LOG_ERROR,
637 "The PMT section cannot fit stream %d and all following streams.\n"
638 "Try reducing the number of languages in the audio streams "
639 "or the total number of streams.\n", i);
641 mpegts_write_section1(&service->pmt, PMT_TID, service->sid, ts->tables_version, 0, 0,
646 static void mpegts_write_sdt(AVFormatContext *s)
648 MpegTSWrite *ts = s->priv_data;
649 MpegTSService *service;
650 uint8_t data[SECTION_LENGTH], *q, *desc_list_len_ptr, *desc_len_ptr;
651 int i, running_status, free_ca_mode, val;
656 for (i = 0; i < ts->nb_services; i++) {
657 service = ts->services[i];
658 put16(&q, service->sid);
659 *q++ = 0xfc | 0x00; /* currently no EIT info */
660 desc_list_len_ptr = q;
662 running_status = 4; /* running */
665 /* write only one descriptor for the service name and provider */
669 *q++ = ts->service_type;
670 putbuf(&q, service->provider_name, service->provider_name[0] + 1);
671 putbuf(&q, service->name, service->name[0] + 1);
672 desc_len_ptr[0] = q - desc_len_ptr - 1;
674 /* fill descriptor length */
675 val = (running_status << 13) | (free_ca_mode << 12) |
676 (q - desc_list_len_ptr - 2);
677 desc_list_len_ptr[0] = val >> 8;
678 desc_list_len_ptr[1] = val;
680 mpegts_write_section1(&ts->sdt, SDT_TID, ts->tsid, ts->tables_version, 0, 0,
684 /* This stores a string in buf with the correct encoding and also sets the
685 * first byte as the length. !str is accepted for an empty string.
686 * If the string is already encoded, invalid UTF-8 or has no multibyte sequence
687 * then we keep it as is, otherwise we signal UTF-8 encoding. */
688 static int encode_str8(uint8_t *buf, const char *str)
693 str_len = strlen(str);
694 if (str[0] && (unsigned)str[0] >= 0x20) { /* Make sure the string is not already encoded. */
695 const uint8_t *q = str;
696 int has_multibyte = 0;
699 GET_UTF8(code, *q++, goto invalid;) /* Is it valid UTF-8? */
700 has_multibyte |= (code > 127); /* Does it have multibyte UTF-8 chars in it? */
702 if (has_multibyte) { /* If we have multibyte chars and valid UTF-8, then encode as such! */
704 return AVERROR(EINVAL);
705 buf[0] = str_len + 1;
707 memcpy(&buf[2], str, str_len);
712 /* Otherwise let's just encode the string as is! */
714 return AVERROR(EINVAL);
716 memcpy(&buf[1], str, str_len);
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 MpegTSService *mpegts_add_service(AVFormatContext *s, int sid,
746 const AVDictionary *metadata,
749 MpegTSWrite *ts = s->priv_data;
750 MpegTSService *service;
751 AVDictionaryEntry *title, *provider;
752 const char *service_name;
753 const char *provider_name;
755 title = av_dict_get(metadata, "service_name", NULL, 0);
757 title = av_dict_get(metadata, "title", NULL, 0);
758 service_name = title ? title->value : DEFAULT_SERVICE_NAME;
759 provider = av_dict_get(metadata, "service_provider", NULL, 0);
760 provider_name = provider ? provider->value : DEFAULT_PROVIDER_NAME;
762 service = av_mallocz(sizeof(MpegTSService));
765 service->pmt.pid = ts->pmt_start_pid + ts->nb_services;
767 service->pcr_pid = 0x1fff;
768 if (encode_str8(service->provider_name, provider_name) < 0 ||
769 encode_str8(service->name, service_name) < 0) {
770 av_log(s, AV_LOG_ERROR, "Too long service or provider name\n");
773 if (av_dynarray_add_nofree(&ts->services, &ts->nb_services, service) < 0)
776 service->pmt.write_packet = section_write_packet;
777 service->pmt.opaque = s;
778 service->pmt.cc = 15;
779 service->pmt.discontinuity= ts->flags & MPEGTS_FLAG_DISCONT;
780 service->program = program;
788 static void enable_pcr_generation_for_stream(AVFormatContext *s, AVStream *pcr_st)
790 MpegTSWrite *ts = s->priv_data;
791 MpegTSWriteStream *ts_st = pcr_st->priv_data;
793 if (ts->mux_rate > 1) {
794 ts_st->pcr_packet_period = (int64_t)ts->mux_rate * ts->pcr_period /
795 (TS_PACKET_SIZE * 8 * 1000);
797 if (pcr_st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
798 int frame_size = av_get_audio_frame_duration2(pcr_st->codecpar, 0);
800 av_log(s, AV_LOG_WARNING, "frame size not set\n");
801 ts_st->pcr_packet_period =
802 pcr_st->codecpar->sample_rate / (10 * 512);
804 ts_st->pcr_packet_period =
805 pcr_st->codecpar->sample_rate / (10 * frame_size);
808 // max delta PCR 0.1s
809 // TODO: should be avg_frame_rate
810 ts_st->pcr_packet_period =
811 ts_st->user_tb.den / (10 * ts_st->user_tb.num);
813 if (!ts_st->pcr_packet_period)
814 ts_st->pcr_packet_period = 1;
817 // output a PCR as soon as possible
818 ts_st->pcr_packet_count = ts_st->pcr_packet_period;
821 static void select_pcr_streams(AVFormatContext *s)
823 MpegTSWrite *ts = s->priv_data;
825 for (int i = 0; i < ts->nb_services; i++) {
826 MpegTSService *service = ts->services[i];
827 AVStream *pcr_st = NULL;
828 AVProgram *program = service->program;
829 int nb_streams = program ? program->nb_stream_indexes : s->nb_streams;
831 for (int j = 0; j < nb_streams; j++) {
832 AVStream *st = s->streams[program ? program->stream_index[j] : j];
834 pcr_st->codecpar->codec_type != AVMEDIA_TYPE_VIDEO && st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
841 MpegTSWriteStream *ts_st = pcr_st->priv_data;
842 service->pcr_pid = ts_st->pid;
843 enable_pcr_generation_for_stream(s, pcr_st);
844 av_log(s, AV_LOG_VERBOSE, "service %i using PCR in pid=%i\n", service->sid, service->pcr_pid);
849 static int mpegts_init(AVFormatContext *s)
851 MpegTSWrite *ts = s->priv_data;
856 if (s->max_delay < 0) /* Not set by the caller */
859 // round up to a whole number of TS packets
860 ts->pes_payload_size = (ts->pes_payload_size + 14 + 183) / 184 * 184 - 14;
862 ts->tsid = ts->transport_stream_id;
863 ts->onid = ts->original_network_id;
864 if (!s->nb_programs) {
865 /* allocate a single DVB service */
866 if (!mpegts_add_service(s, ts->service_id, s->metadata, NULL))
867 return AVERROR(ENOMEM);
869 for (i = 0; i < s->nb_programs; i++) {
870 AVProgram *program = s->programs[i];
871 if (!mpegts_add_service(s, program->id, program->metadata, program))
872 return AVERROR(ENOMEM);
876 ts->pat.pid = PAT_PID;
877 /* Initialize at 15 so that it wraps and is equal to 0 for the
878 * first packet we write. */
880 ts->pat.discontinuity= ts->flags & MPEGTS_FLAG_DISCONT;
881 ts->pat.write_packet = section_write_packet;
884 ts->sdt.pid = SDT_PID;
886 ts->sdt.discontinuity= ts->flags & MPEGTS_FLAG_DISCONT;
887 ts->sdt.write_packet = section_write_packet;
890 pids = av_malloc_array(s->nb_streams, sizeof(*pids));
892 ret = AVERROR(ENOMEM);
896 /* assign pids to each stream */
897 for (i = 0; i < s->nb_streams; i++) {
898 AVStream *st = s->streams[i];
899 MpegTSWriteStream *ts_st;
901 ts_st = av_mallocz(sizeof(MpegTSWriteStream));
903 ret = AVERROR(ENOMEM);
906 st->priv_data = ts_st;
908 ts_st->user_tb = st->time_base;
909 avpriv_set_pts_info(st, 33, 1, 90000);
911 ts_st->payload = av_mallocz(ts->pes_payload_size);
912 if (!ts_st->payload) {
913 ret = AVERROR(ENOMEM);
917 /* MPEG pid values < 16 are reserved. Applications which set st->id in
918 * this range are assigned a calculated pid. */
920 ts_st->pid = ts->start_pid + i;
921 } else if (st->id < 0x1FFF) {
924 av_log(s, AV_LOG_ERROR,
925 "Invalid stream id %d, must be less than 8191\n", st->id);
926 ret = AVERROR(EINVAL);
929 for (j = 0; j < ts->nb_services; j++) {
930 if (ts_st->pid == ts->services[j]->pmt.pid) {
931 av_log(s, AV_LOG_ERROR, "Duplicate stream id %d\n", ts_st->pid);
932 ret = AVERROR(EINVAL);
936 for (j = 0; j < i; j++) {
937 if (pids[j] == ts_st->pid) {
938 av_log(s, AV_LOG_ERROR, "Duplicate stream id %d\n", ts_st->pid);
939 ret = AVERROR(EINVAL);
943 pids[i] = ts_st->pid;
944 ts_st->payload_pts = AV_NOPTS_VALUE;
945 ts_st->payload_dts = AV_NOPTS_VALUE;
946 ts_st->first_pts_check = 1;
948 ts_st->discontinuity = ts->flags & MPEGTS_FLAG_DISCONT;
949 if (st->codecpar->codec_id == AV_CODEC_ID_AAC &&
950 st->codecpar->extradata_size > 0) {
952 ts_st->amux = avformat_alloc_context();
954 ret = AVERROR(ENOMEM);
957 ts_st->amux->oformat =
958 av_guess_format((ts->flags & MPEGTS_FLAG_AAC_LATM) ? "latm" : "adts",
960 if (!ts_st->amux->oformat) {
961 ret = AVERROR(EINVAL);
964 if (!(ast = avformat_new_stream(ts_st->amux, NULL))) {
965 ret = AVERROR(ENOMEM);
968 ret = avcodec_parameters_copy(ast->codecpar, st->codecpar);
971 ast->time_base = st->time_base;
972 ret = avformat_write_header(ts_st->amux, NULL);
976 if (st->codecpar->codec_id == AV_CODEC_ID_OPUS) {
977 ts_st->opus_pending_trim_start = st->codecpar->initial_padding * 48000 / st->codecpar->sample_rate;
983 if (ts->mux_rate > 1) {
984 ts->sdt_packet_period = (int64_t)ts->mux_rate * SDT_RETRANS_TIME /
985 (TS_PACKET_SIZE * 8 * 1000);
986 ts->pat_packet_period = (int64_t)ts->mux_rate * PAT_RETRANS_TIME /
987 (TS_PACKET_SIZE * 8 * 1000);
990 ts->first_pcr = av_rescale(s->max_delay, PCR_TIME_BASE, AV_TIME_BASE);
992 /* Arbitrary values, PAT/PMT will also be written on video key frames */
993 ts->sdt_packet_period = 200;
994 ts->pat_packet_period = 40;
997 select_pcr_streams(s);
999 ts->last_pat_ts = AV_NOPTS_VALUE;
1000 ts->last_sdt_ts = AV_NOPTS_VALUE;
1001 // The user specified a period, use only it
1002 if (ts->pat_period < INT_MAX/2) {
1003 ts->pat_packet_period = INT_MAX;
1005 if (ts->sdt_period < INT_MAX/2) {
1006 ts->sdt_packet_period = INT_MAX;
1009 ts->pat_packet_count = ts->pat_packet_period - 1;
1010 ts->sdt_packet_count = ts->sdt_packet_period - 1;
1012 if (ts->mux_rate == 1)
1013 av_log(s, AV_LOG_VERBOSE, "muxrate VBR, ");
1015 av_log(s, AV_LOG_VERBOSE, "muxrate %d, ", ts->mux_rate);
1016 av_log(s, AV_LOG_VERBOSE,
1017 "sdt every %d, pat/pmt every %d pkts\n",
1018 ts->sdt_packet_period, ts->pat_packet_period);
1020 if (ts->m2ts_mode == -1) {
1021 if (av_match_ext(s->url, "m2ts")) {
1035 /* send SDT, PAT and PMT tables regularly */
1036 static void retransmit_si_info(AVFormatContext *s, int force_pat, int64_t dts)
1038 MpegTSWrite *ts = s->priv_data;
1041 if (++ts->sdt_packet_count == ts->sdt_packet_period ||
1042 (dts != AV_NOPTS_VALUE && ts->last_sdt_ts == AV_NOPTS_VALUE) ||
1043 (dts != AV_NOPTS_VALUE && dts - ts->last_sdt_ts >= ts->sdt_period*90000.0)
1045 ts->sdt_packet_count = 0;
1046 if (dts != AV_NOPTS_VALUE)
1047 ts->last_sdt_ts = FFMAX(dts, ts->last_sdt_ts);
1048 mpegts_write_sdt(s);
1050 if (++ts->pat_packet_count == ts->pat_packet_period ||
1051 (dts != AV_NOPTS_VALUE && ts->last_pat_ts == AV_NOPTS_VALUE) ||
1052 (dts != AV_NOPTS_VALUE && dts - ts->last_pat_ts >= ts->pat_period*90000.0) ||
1054 ts->pat_packet_count = 0;
1055 if (dts != AV_NOPTS_VALUE)
1056 ts->last_pat_ts = FFMAX(dts, ts->last_pat_ts);
1057 mpegts_write_pat(s);
1058 for (i = 0; i < ts->nb_services; i++)
1059 mpegts_write_pmt(s, ts->services[i]);
1063 static int write_pcr_bits(uint8_t *buf, int64_t pcr)
1065 int64_t pcr_low = pcr % 300, pcr_high = pcr / 300;
1067 *buf++ = pcr_high >> 25;
1068 *buf++ = pcr_high >> 17;
1069 *buf++ = pcr_high >> 9;
1070 *buf++ = pcr_high >> 1;
1071 *buf++ = pcr_high << 7 | pcr_low >> 8 | 0x7e;
1077 /* Write a single null transport stream packet */
1078 static void mpegts_insert_null_packet(AVFormatContext *s)
1081 uint8_t buf[TS_PACKET_SIZE];
1088 memset(q, 0x0FF, TS_PACKET_SIZE - (q - buf));
1089 mpegts_prefix_m2ts_header(s);
1090 avio_write(s->pb, buf, TS_PACKET_SIZE);
1093 /* Write a single transport stream packet with a PCR and no payload */
1094 static void mpegts_insert_pcr_only(AVFormatContext *s, AVStream *st)
1096 MpegTSWrite *ts = s->priv_data;
1097 MpegTSWriteStream *ts_st = st->priv_data;
1099 uint8_t buf[TS_PACKET_SIZE];
1103 *q++ = ts_st->pid >> 8;
1105 *q++ = 0x20 | ts_st->cc; /* Adaptation only */
1106 /* Continuity Count field does not increment (see 13818-1 section 2.4.3.3) */
1107 *q++ = TS_PACKET_SIZE - 5; /* Adaptation Field Length */
1108 *q++ = 0x10; /* Adaptation flags: PCR present */
1109 if (ts_st->discontinuity) {
1111 ts_st->discontinuity = 0;
1114 /* PCR coded into 6 bytes */
1115 q += write_pcr_bits(q, get_pcr(ts, s->pb));
1117 /* stuffing bytes */
1118 memset(q, 0xFF, TS_PACKET_SIZE - (q - buf));
1119 mpegts_prefix_m2ts_header(s);
1120 avio_write(s->pb, buf, TS_PACKET_SIZE);
1123 static void write_pts(uint8_t *q, int fourbits, int64_t pts)
1127 val = fourbits << 4 | (((pts >> 30) & 0x07) << 1) | 1;
1129 val = (((pts >> 15) & 0x7fff) << 1) | 1;
1132 val = (((pts) & 0x7fff) << 1) | 1;
1137 /* Set an adaptation field flag in an MPEG-TS packet*/
1138 static void set_af_flag(uint8_t *pkt, int flag)
1140 // expect at least one flag to set
1143 if ((pkt[3] & 0x20) == 0) {
1144 // no AF yet, set adaptation field flag
1146 // 1 byte length, no flags
1153 /* Extend the adaptation field by size bytes */
1154 static void extend_af(uint8_t *pkt, int size)
1156 // expect already existing adaptation field
1157 av_assert0(pkt[3] & 0x20);
1161 /* Get a pointer to MPEG-TS payload (right after TS packet header) */
1162 static uint8_t *get_ts_payload_start(uint8_t *pkt)
1165 return pkt + 5 + pkt[4];
1170 /* Add a PES header to the front of the payload, and segment into an integer
1171 * number of TS packets. The final TS packet is padded using an oversized
1172 * adaptation header to exactly fill the last TS packet.
1173 * NOTE: 'payload' contains a complete PES payload. */
1174 static void mpegts_write_pes(AVFormatContext *s, AVStream *st,
1175 const uint8_t *payload, int payload_size,
1176 int64_t pts, int64_t dts, int key, int stream_id)
1178 MpegTSWriteStream *ts_st = st->priv_data;
1179 MpegTSWrite *ts = s->priv_data;
1180 uint8_t buf[TS_PACKET_SIZE];
1182 int val, is_start, len, header_len, write_pcr, is_dvb_subtitle, is_dvb_teletext, flags;
1183 int afc_len, stuffing_len;
1184 int64_t pcr = -1; /* avoid warning */
1185 int64_t delay = av_rescale(s->max_delay, 90000, AV_TIME_BASE);
1186 int force_pat = st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO && key && !ts_st->prev_payload_key;
1188 av_assert0(ts_st->payload != buf || st->codecpar->codec_type != AVMEDIA_TYPE_VIDEO);
1189 if (ts->flags & MPEGTS_FLAG_PAT_PMT_AT_FRAMES && st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
1194 while (payload_size > 0) {
1195 retransmit_si_info(s, force_pat, dts);
1199 if (ts_st->pcr_packet_period) {
1200 if (ts->mux_rate > 1 || is_start) // VBR pcr period is based on frames
1201 ts_st->pcr_packet_count++;
1202 if (ts_st->pcr_packet_count >=
1203 ts_st->pcr_packet_period) {
1204 ts_st->pcr_packet_count = 0;
1209 if (ts->mux_rate > 1 && dts != AV_NOPTS_VALUE &&
1210 (dts - get_pcr(ts, s->pb) / 300) > delay) {
1211 /* pcr insert gets priority over null packet insert */
1213 mpegts_insert_pcr_only(s, st);
1215 mpegts_insert_null_packet(s);
1216 /* recalculate write_pcr and possibly retransmit si_info */
1220 /* prepare packet header */
1223 val = ts_st->pid >> 8;
1228 ts_st->cc = ts_st->cc + 1 & 0xf;
1229 *q++ = 0x10 | ts_st->cc; // payload indicator + CC
1230 if (ts_st->discontinuity) {
1231 set_af_flag(buf, 0x80);
1232 q = get_ts_payload_start(buf);
1233 ts_st->discontinuity = 0;
1235 if (key && is_start && pts != AV_NOPTS_VALUE) {
1236 // set Random Access for key frames
1237 if (ts_st->pcr_packet_period)
1239 set_af_flag(buf, 0x40);
1240 q = get_ts_payload_start(buf);
1243 set_af_flag(buf, 0x10);
1244 q = get_ts_payload_start(buf);
1245 // add 11, pcr references the last byte of program clock reference base
1246 if (ts->mux_rate > 1)
1247 pcr = get_pcr(ts, s->pb);
1249 pcr = (dts - delay) * 300;
1250 if (dts != AV_NOPTS_VALUE && dts < pcr / 300)
1251 av_log(s, AV_LOG_WARNING, "dts < pcr, TS is invalid\n");
1252 extend_af(buf, write_pcr_bits(q, pcr));
1253 q = get_ts_payload_start(buf);
1256 int pes_extension = 0;
1257 int pes_header_stuffing_bytes = 0;
1258 /* write PES header */
1262 is_dvb_subtitle = 0;
1263 is_dvb_teletext = 0;
1264 if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
1265 if (st->codecpar->codec_id == AV_CODEC_ID_DIRAC)
1269 } else if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO &&
1270 (st->codecpar->codec_id == AV_CODEC_ID_MP2 ||
1271 st->codecpar->codec_id == AV_CODEC_ID_MP3 ||
1272 st->codecpar->codec_id == AV_CODEC_ID_AAC)) {
1274 } else if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO &&
1275 st->codecpar->codec_id == AV_CODEC_ID_AC3 &&
1278 } else if (st->codecpar->codec_type == AVMEDIA_TYPE_DATA &&
1279 st->codecpar->codec_id == AV_CODEC_ID_TIMED_ID3) {
1281 } else if (st->codecpar->codec_type == AVMEDIA_TYPE_DATA) {
1282 *q++ = stream_id != -1 ? stream_id : 0xfc;
1284 if (stream_id == 0xbd) /* asynchronous KLV */
1285 pts = dts = AV_NOPTS_VALUE;
1288 if (st->codecpar->codec_type == AVMEDIA_TYPE_SUBTITLE) {
1289 if (st->codecpar->codec_id == AV_CODEC_ID_DVB_SUBTITLE) {
1290 is_dvb_subtitle = 1;
1291 } else if (st->codecpar->codec_id == AV_CODEC_ID_DVB_TELETEXT) {
1292 is_dvb_teletext = 1;
1298 if (pts != AV_NOPTS_VALUE) {
1302 if (dts != AV_NOPTS_VALUE && pts != AV_NOPTS_VALUE && dts != pts) {
1306 if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO &&
1307 st->codecpar->codec_id == AV_CODEC_ID_DIRAC) {
1308 /* set PES_extension_flag */
1312 /* One byte for PES2 extension flag +
1313 * one byte for extension length +
1314 * one byte for extension id */
1317 /* for Blu-ray AC3 Audio the PES Extension flag should be as follow
1318 * otherwise it will not play sound on blu-ray
1320 if (ts->m2ts_mode &&
1321 st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO &&
1322 st->codecpar->codec_id == AV_CODEC_ID_AC3) {
1323 /* set PES_extension_flag */
1328 if (is_dvb_teletext) {
1329 pes_header_stuffing_bytes = 0x24 - header_len;
1332 len = payload_size + header_len + 3;
1333 /* 3 extra bytes should be added to DVB subtitle payload: 0x20 0x00 at the beginning and trailing 0xff */
1334 if (is_dvb_subtitle) {
1340 if (ts->omit_video_pes_length && st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
1346 /* data alignment indicator is required for subtitle and data streams */
1347 if (st->codecpar->codec_type == AVMEDIA_TYPE_SUBTITLE || st->codecpar->codec_type == AVMEDIA_TYPE_DATA)
1352 if (pts != AV_NOPTS_VALUE) {
1353 write_pts(q, flags >> 6, pts);
1356 if (dts != AV_NOPTS_VALUE && pts != AV_NOPTS_VALUE && dts != pts) {
1357 write_pts(q, 1, dts);
1360 if (pes_extension && st->codecpar->codec_id == AV_CODEC_ID_DIRAC) {
1361 flags = 0x01; /* set PES_extension_flag_2 */
1363 *q++ = 0x80 | 0x01; /* marker bit + extension length */
1364 /* Set the stream ID extension flag bit to 0 and
1365 * write the extended stream ID. */
1368 /* For Blu-ray AC3 Audio Setting extended flags */
1369 if (ts->m2ts_mode &&
1371 st->codecpar->codec_id == AV_CODEC_ID_AC3) {
1372 flags = 0x01; /* set PES_extension_flag_2 */
1374 *q++ = 0x80 | 0x01; /* marker bit + extension length */
1375 *q++ = 0x00 | 0x71; /* for AC3 Audio (specifically on blue-rays) */
1379 if (is_dvb_subtitle) {
1380 /* First two fields of DVB subtitles PES data:
1381 * data_identifier: for DVB subtitle streams shall be coded with the value 0x20
1382 * subtitle_stream_id: for DVB subtitle stream shall be identified by the value 0x00 */
1386 if (is_dvb_teletext) {
1387 memset(q, 0xff, pes_header_stuffing_bytes);
1388 q += pes_header_stuffing_bytes;
1393 header_len = q - buf;
1395 len = TS_PACKET_SIZE - header_len;
1396 if (len > payload_size)
1398 stuffing_len = TS_PACKET_SIZE - header_len - len;
1399 if (stuffing_len > 0) {
1400 /* add stuffing with AFC */
1401 if (buf[3] & 0x20) {
1402 /* stuffing already present: increase its size */
1403 afc_len = buf[4] + 1;
1404 memmove(buf + 4 + afc_len + stuffing_len,
1406 header_len - (4 + afc_len));
1407 buf[4] += stuffing_len;
1408 memset(buf + 4 + afc_len, 0xff, stuffing_len);
1411 memmove(buf + 4 + stuffing_len, buf + 4, header_len - 4);
1413 buf[4] = stuffing_len - 1;
1414 if (stuffing_len >= 2) {
1416 memset(buf + 6, 0xff, stuffing_len - 2);
1421 if (is_dvb_subtitle && payload_size == len) {
1422 memcpy(buf + TS_PACKET_SIZE - len, payload, len - 1);
1423 buf[TS_PACKET_SIZE - 1] = 0xff; /* end_of_PES_data_field_marker: an 8-bit field with fixed contents 0xff for DVB subtitle */
1425 memcpy(buf + TS_PACKET_SIZE - len, payload, len);
1429 payload_size -= len;
1430 mpegts_prefix_m2ts_header(s);
1431 avio_write(s->pb, buf, TS_PACKET_SIZE);
1433 ts_st->prev_payload_key = key;
1436 int ff_check_h264_startcode(AVFormatContext *s, const AVStream *st, const AVPacket *pkt)
1438 if (pkt->size < 5 || AV_RB32(pkt->data) != 0x0000001 && AV_RB24(pkt->data) != 0x000001) {
1439 if (!st->nb_frames) {
1440 av_log(s, AV_LOG_ERROR, "H.264 bitstream malformed, "
1441 "no startcode found, use the video bitstream filter 'h264_mp4toannexb' to fix it "
1442 "('-bsf:v h264_mp4toannexb' option with ffmpeg)\n");
1443 return AVERROR_INVALIDDATA;
1445 av_log(s, AV_LOG_WARNING, "H.264 bitstream error, startcode missing, size %d", pkt->size);
1447 av_log(s, AV_LOG_WARNING, " data %08"PRIX32, AV_RB32(pkt->data));
1448 av_log(s, AV_LOG_WARNING, "\n");
1453 static int check_hevc_startcode(AVFormatContext *s, const AVStream *st, const AVPacket *pkt)
1455 if (pkt->size < 5 || AV_RB32(pkt->data) != 0x0000001 && AV_RB24(pkt->data) != 0x000001) {
1456 if (!st->nb_frames) {
1457 av_log(s, AV_LOG_ERROR, "HEVC bitstream malformed, no startcode found\n");
1458 return AVERROR_PATCHWELCOME;
1460 av_log(s, AV_LOG_WARNING, "HEVC bitstream error, startcode missing, size %d", pkt->size);
1462 av_log(s, AV_LOG_WARNING, " data %08"PRIX32, AV_RB32(pkt->data));
1463 av_log(s, AV_LOG_WARNING, "\n");
1468 /* Based on GStreamer's gst-plugins-base/ext/ogg/gstoggstream.c
1469 * Released under the LGPL v2.1+, written by
1470 * Vincent Penquerc'h <vincent.penquerch@collabora.co.uk>
1472 static int opus_get_packet_samples(AVFormatContext *s, AVPacket *pkt)
1474 static const int durations[32] = {
1475 480, 960, 1920, 2880, /* Silk NB */
1476 480, 960, 1920, 2880, /* Silk MB */
1477 480, 960, 1920, 2880, /* Silk WB */
1478 480, 960, /* Hybrid SWB */
1479 480, 960, /* Hybrid FB */
1480 120, 240, 480, 960, /* CELT NB */
1481 120, 240, 480, 960, /* CELT NB */
1482 120, 240, 480, 960, /* CELT NB */
1483 120, 240, 480, 960, /* CELT NB */
1485 int toc, frame_duration, nframes, duration;
1492 frame_duration = durations[toc >> 3];
1506 nframes = pkt->data[1] & 63;
1510 duration = nframes * frame_duration;
1511 if (duration > 5760) {
1512 av_log(s, AV_LOG_WARNING,
1513 "Opus packet duration > 120 ms, invalid");
1520 static int mpegts_write_packet_internal(AVFormatContext *s, AVPacket *pkt)
1522 AVStream *st = s->streams[pkt->stream_index];
1523 int size = pkt->size;
1524 uint8_t *buf = pkt->data;
1525 uint8_t *data = NULL;
1526 MpegTSWrite *ts = s->priv_data;
1527 MpegTSWriteStream *ts_st = st->priv_data;
1528 const int64_t delay = av_rescale(s->max_delay, 90000, AV_TIME_BASE) * 2;
1529 int64_t dts = pkt->dts, pts = pkt->pts;
1530 int opus_samples = 0;
1532 uint8_t *side_data = NULL;
1535 side_data = av_packet_get_side_data(pkt,
1536 AV_PKT_DATA_MPEGTS_STREAM_ID,
1539 stream_id = side_data[0];
1541 if (ts->reemit_pat_pmt) {
1542 av_log(s, AV_LOG_WARNING,
1543 "resend_headers option is deprecated, use -mpegts_flags resend_headers\n");
1544 ts->reemit_pat_pmt = 0;
1545 ts->flags |= MPEGTS_FLAG_REEMIT_PAT_PMT;
1548 if (ts->flags & MPEGTS_FLAG_REEMIT_PAT_PMT) {
1549 ts->pat_packet_count = ts->pat_packet_period - 1;
1550 ts->sdt_packet_count = ts->sdt_packet_period - 1;
1551 ts->flags &= ~MPEGTS_FLAG_REEMIT_PAT_PMT;
1554 if (ts->copyts < 1) {
1555 if (pts != AV_NOPTS_VALUE)
1557 if (dts != AV_NOPTS_VALUE)
1561 if (ts_st->first_pts_check && pts == AV_NOPTS_VALUE) {
1562 av_log(s, AV_LOG_ERROR, "first pts value must be set\n");
1563 return AVERROR_INVALIDDATA;
1565 ts_st->first_pts_check = 0;
1567 if (st->codecpar->codec_id == AV_CODEC_ID_H264) {
1568 const uint8_t *p = buf, *buf_end = p + size;
1569 uint32_t state = -1;
1570 int extradd = (pkt->flags & AV_PKT_FLAG_KEY) ? st->codecpar->extradata_size : 0;
1571 int ret = ff_check_h264_startcode(s, st, pkt);
1575 if (extradd && AV_RB24(st->codecpar->extradata) > 1)
1579 p = avpriv_find_start_code(p, buf_end, &state);
1580 av_log(s, AV_LOG_TRACE, "nal %"PRId32"\n", state & 0x1f);
1581 if ((state & 0x1f) == 7)
1583 } while (p < buf_end && (state & 0x1f) != 9 &&
1584 (state & 0x1f) != 5 && (state & 0x1f) != 1);
1586 if ((state & 0x1f) != 5)
1588 if ((state & 0x1f) != 9) { // AUD NAL
1589 data = av_malloc(pkt->size + 6 + extradd);
1591 return AVERROR(ENOMEM);
1592 memcpy(data + 6, st->codecpar->extradata, extradd);
1593 memcpy(data + 6 + extradd, pkt->data, pkt->size);
1594 AV_WB32(data, 0x00000001);
1596 data[5] = 0xf0; // any slice type (0xe) + rbsp stop one bit
1598 size = pkt->size + 6 + extradd;
1600 } else if (st->codecpar->codec_id == AV_CODEC_ID_AAC) {
1601 if (pkt->size < 2) {
1602 av_log(s, AV_LOG_ERROR, "AAC packet too short\n");
1603 return AVERROR_INVALIDDATA;
1605 if ((AV_RB16(pkt->data) & 0xfff0) != 0xfff0) {
1610 av_log(s, AV_LOG_ERROR, "AAC bitstream not in ADTS format "
1611 "and extradata missing\n");
1613 av_init_packet(&pkt2);
1614 pkt2.data = pkt->data;
1615 pkt2.size = pkt->size;
1616 av_assert0(pkt->dts != AV_NOPTS_VALUE);
1617 pkt2.dts = av_rescale_q(pkt->dts, st->time_base, ts_st->amux->streams[0]->time_base);
1619 ret = avio_open_dyn_buf(&ts_st->amux->pb);
1621 return AVERROR(ENOMEM);
1623 ret = av_write_frame(ts_st->amux, &pkt2);
1625 ffio_free_dyn_buf(&ts_st->amux->pb);
1628 size = avio_close_dyn_buf(ts_st->amux->pb, &data);
1629 ts_st->amux->pb = NULL;
1633 } else if (st->codecpar->codec_id == AV_CODEC_ID_HEVC) {
1634 const uint8_t *p = buf, *buf_end = p + size;
1635 uint32_t state = -1;
1636 int extradd = (pkt->flags & AV_PKT_FLAG_KEY) ? st->codecpar->extradata_size : 0;
1637 int ret = check_hevc_startcode(s, st, pkt);
1641 if (extradd && AV_RB24(st->codecpar->extradata) > 1)
1645 p = avpriv_find_start_code(p, buf_end, &state);
1646 av_log(s, AV_LOG_TRACE, "nal %"PRId32"\n", (state & 0x7e)>>1);
1647 if ((state & 0x7e) == 2*32)
1649 } while (p < buf_end && (state & 0x7e) != 2*35 &&
1650 (state & 0x7e) >= 2*32);
1652 if ((state & 0x7e) < 2*16 && (state & 0x7e) >= 2*24)
1654 if ((state & 0x7e) != 2*35) { // AUD NAL
1655 data = av_malloc(pkt->size + 7 + extradd);
1657 return AVERROR(ENOMEM);
1658 memcpy(data + 7, st->codecpar->extradata, extradd);
1659 memcpy(data + 7 + extradd, pkt->data, pkt->size);
1660 AV_WB32(data, 0x00000001);
1663 data[6] = 0x50; // any slice type (0x4) + rbsp stop one bit
1665 size = pkt->size + 7 + extradd;
1667 } else if (st->codecpar->codec_id == AV_CODEC_ID_OPUS) {
1668 if (pkt->size < 2) {
1669 av_log(s, AV_LOG_ERROR, "Opus packet too short\n");
1670 return AVERROR_INVALIDDATA;
1673 /* Add Opus control header */
1674 if ((AV_RB16(pkt->data) >> 5) != 0x3ff) {
1678 int ctrl_header_size;
1679 int trim_start = 0, trim_end = 0;
1681 opus_samples = opus_get_packet_samples(s, pkt);
1683 side_data = av_packet_get_side_data(pkt,
1684 AV_PKT_DATA_SKIP_SAMPLES,
1687 if (side_data && side_data_size >= 10) {
1688 trim_end = AV_RL32(side_data + 4) * 48000 / st->codecpar->sample_rate;
1691 ctrl_header_size = pkt->size + 2 + pkt->size / 255 + 1;
1692 if (ts_st->opus_pending_trim_start)
1693 ctrl_header_size += 2;
1695 ctrl_header_size += 2;
1697 data = av_malloc(ctrl_header_size);
1699 return AVERROR(ENOMEM);
1703 if (ts_st->opus_pending_trim_start)
1711 data[i] = FFMIN(n, 255);
1716 av_assert0(2 + pkt->size / 255 + 1 == i);
1718 if (ts_st->opus_pending_trim_start) {
1719 trim_start = FFMIN(ts_st->opus_pending_trim_start, opus_samples);
1720 AV_WB16(data + i, trim_start);
1722 ts_st->opus_pending_trim_start -= trim_start;
1725 trim_end = FFMIN(trim_end, opus_samples - trim_start);
1726 AV_WB16(data + i, trim_end);
1730 memcpy(data + i, pkt->data, pkt->size);
1732 size = ctrl_header_size;
1734 /* TODO: Can we get TS formatted data here? If so we will
1735 * need to count the samples of that too! */
1736 av_log(s, AV_LOG_WARNING, "Got MPEG-TS formatted Opus data, unhandled");
1740 if (pkt->dts != AV_NOPTS_VALUE) {
1742 for(i=0; i<s->nb_streams; i++) {
1743 AVStream *st2 = s->streams[i];
1744 MpegTSWriteStream *ts_st2 = st2->priv_data;
1745 if ( ts_st2->payload_size
1746 && (ts_st2->payload_dts == AV_NOPTS_VALUE || dts - ts_st2->payload_dts > delay/2)) {
1747 mpegts_write_pes(s, st2, ts_st2->payload, ts_st2->payload_size,
1748 ts_st2->payload_pts, ts_st2->payload_dts,
1749 ts_st2->payload_flags & AV_PKT_FLAG_KEY, stream_id);
1750 ts_st2->payload_size = 0;
1755 if (ts_st->payload_size && (ts_st->payload_size + size > ts->pes_payload_size ||
1756 (dts != AV_NOPTS_VALUE && ts_st->payload_dts != AV_NOPTS_VALUE &&
1757 av_compare_ts(dts - ts_st->payload_dts, st->time_base,
1758 s->max_delay, AV_TIME_BASE_Q) >= 0) ||
1759 ts_st->opus_queued_samples + opus_samples >= 5760 /* 120ms */)) {
1760 mpegts_write_pes(s, st, ts_st->payload, ts_st->payload_size,
1761 ts_st->payload_pts, ts_st->payload_dts,
1762 ts_st->payload_flags & AV_PKT_FLAG_KEY, stream_id);
1763 ts_st->payload_size = 0;
1764 ts_st->opus_queued_samples = 0;
1767 if (st->codecpar->codec_type != AVMEDIA_TYPE_AUDIO || size > ts->pes_payload_size) {
1768 av_assert0(!ts_st->payload_size);
1769 // for video and subtitle, write a single pes packet
1770 mpegts_write_pes(s, st, buf, size, pts, dts,
1771 pkt->flags & AV_PKT_FLAG_KEY, stream_id);
1772 ts_st->opus_queued_samples = 0;
1777 if (!ts_st->payload_size) {
1778 ts_st->payload_pts = pts;
1779 ts_st->payload_dts = dts;
1780 ts_st->payload_flags = pkt->flags;
1783 memcpy(ts_st->payload + ts_st->payload_size, buf, size);
1784 ts_st->payload_size += size;
1785 ts_st->opus_queued_samples += opus_samples;
1792 static void mpegts_write_flush(AVFormatContext *s)
1796 /* flush current packets */
1797 for (i = 0; i < s->nb_streams; i++) {
1798 AVStream *st = s->streams[i];
1799 MpegTSWriteStream *ts_st = st->priv_data;
1800 if (ts_st->payload_size > 0) {
1801 mpegts_write_pes(s, st, ts_st->payload, ts_st->payload_size,
1802 ts_st->payload_pts, ts_st->payload_dts,
1803 ts_st->payload_flags & AV_PKT_FLAG_KEY, -1);
1804 ts_st->payload_size = 0;
1805 ts_st->opus_queued_samples = 0;
1810 static int mpegts_write_packet(AVFormatContext *s, AVPacket *pkt)
1813 mpegts_write_flush(s);
1816 return mpegts_write_packet_internal(s, pkt);
1820 static int mpegts_write_end(AVFormatContext *s)
1823 mpegts_write_flush(s);
1828 static void mpegts_deinit(AVFormatContext *s)
1830 MpegTSWrite *ts = s->priv_data;
1831 MpegTSService *service;
1834 for (i = 0; i < s->nb_streams; i++) {
1835 AVStream *st = s->streams[i];
1836 MpegTSWriteStream *ts_st = st->priv_data;
1838 av_freep(&ts_st->payload);
1840 avformat_free_context(ts_st->amux);
1846 for (i = 0; i < ts->nb_services; i++) {
1847 service = ts->services[i];
1850 av_freep(&ts->services);
1853 static int mpegts_check_bitstream(struct AVFormatContext *s, const AVPacket *pkt)
1856 AVStream *st = s->streams[pkt->stream_index];
1858 if (st->codecpar->codec_id == AV_CODEC_ID_H264) {
1859 if (pkt->size >= 5 && AV_RB32(pkt->data) != 0x0000001 &&
1860 (AV_RB24(pkt->data) != 0x000001 ||
1861 (st->codecpar->extradata_size > 0 &&
1862 st->codecpar->extradata[0] == 1)))
1863 ret = ff_stream_add_bitstream_filter(st, "h264_mp4toannexb", NULL);
1864 } else if (st->codecpar->codec_id == AV_CODEC_ID_HEVC) {
1865 if (pkt->size >= 5 && AV_RB32(pkt->data) != 0x0000001 &&
1866 (AV_RB24(pkt->data) != 0x000001 ||
1867 (st->codecpar->extradata_size > 0 &&
1868 st->codecpar->extradata[0] == 1)))
1869 ret = ff_stream_add_bitstream_filter(st, "hevc_mp4toannexb", NULL);
1875 static const AVOption options[] = {
1876 { "mpegts_transport_stream_id", "Set transport_stream_id field.",
1877 offsetof(MpegTSWrite, transport_stream_id), AV_OPT_TYPE_INT,
1878 { .i64 = 0x0001 }, 0x0001, 0xffff, AV_OPT_FLAG_ENCODING_PARAM },
1879 { "mpegts_original_network_id", "Set original_network_id field.",
1880 offsetof(MpegTSWrite, original_network_id), AV_OPT_TYPE_INT,
1881 { .i64 = DVB_PRIVATE_NETWORK_START }, 0x0001, 0xffff, AV_OPT_FLAG_ENCODING_PARAM },
1882 { "mpegts_service_id", "Set service_id field.",
1883 offsetof(MpegTSWrite, service_id), AV_OPT_TYPE_INT,
1884 { .i64 = 0x0001 }, 0x0001, 0xffff, AV_OPT_FLAG_ENCODING_PARAM },
1885 { "mpegts_service_type", "Set service_type field.",
1886 offsetof(MpegTSWrite, service_type), AV_OPT_TYPE_INT,
1887 { .i64 = 0x01 }, 0x01, 0xff, AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
1888 { "digital_tv", "Digital Television.",
1889 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_DIGITAL_TV }, 0x01, 0xff,
1890 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
1891 { "digital_radio", "Digital Radio.",
1892 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_DIGITAL_RADIO }, 0x01, 0xff,
1893 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
1894 { "teletext", "Teletext.",
1895 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_TELETEXT }, 0x01, 0xff,
1896 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
1897 { "advanced_codec_digital_radio", "Advanced Codec Digital Radio.",
1898 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_ADVANCED_CODEC_DIGITAL_RADIO }, 0x01, 0xff,
1899 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
1900 { "mpeg2_digital_hdtv", "MPEG2 Digital HDTV.",
1901 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_MPEG2_DIGITAL_HDTV }, 0x01, 0xff,
1902 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
1903 { "advanced_codec_digital_sdtv", "Advanced Codec Digital SDTV.",
1904 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_ADVANCED_CODEC_DIGITAL_SDTV }, 0x01, 0xff,
1905 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
1906 { "advanced_codec_digital_hdtv", "Advanced Codec Digital HDTV.",
1907 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_ADVANCED_CODEC_DIGITAL_HDTV }, 0x01, 0xff,
1908 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
1909 { "hevc_digital_hdtv", "HEVC Digital Television Service.",
1910 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_HEVC_DIGITAL_HDTV }, 0x01, 0xff,
1911 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
1912 { "mpegts_pmt_start_pid", "Set the first pid of the PMT.",
1913 offsetof(MpegTSWrite, pmt_start_pid), AV_OPT_TYPE_INT,
1914 { .i64 = 0x1000 }, 0x0010, 0x1f00, AV_OPT_FLAG_ENCODING_PARAM },
1915 { "mpegts_start_pid", "Set the first pid.",
1916 offsetof(MpegTSWrite, start_pid), AV_OPT_TYPE_INT,
1917 { .i64 = 0x0100 }, 0x0010, 0x0f00, AV_OPT_FLAG_ENCODING_PARAM },
1918 { "mpegts_m2ts_mode", "Enable m2ts mode.",
1919 offsetof(MpegTSWrite, m2ts_mode), AV_OPT_TYPE_BOOL,
1920 { .i64 = -1 }, -1, 1, AV_OPT_FLAG_ENCODING_PARAM },
1922 offsetof(MpegTSWrite, mux_rate), AV_OPT_TYPE_INT,
1923 { .i64 = 1 }, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
1924 { "pes_payload_size", "Minimum PES packet payload in bytes",
1925 offsetof(MpegTSWrite, pes_payload_size), AV_OPT_TYPE_INT,
1926 { .i64 = DEFAULT_PES_PAYLOAD_SIZE }, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
1927 { "mpegts_flags", "MPEG-TS muxing flags",
1928 offsetof(MpegTSWrite, flags), AV_OPT_TYPE_FLAGS, { .i64 = 0 }, 0, INT_MAX,
1929 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_flags" },
1930 { "resend_headers", "Reemit PAT/PMT before writing the next packet",
1931 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_FLAG_REEMIT_PAT_PMT }, 0, INT_MAX,
1932 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_flags" },
1933 { "latm", "Use LATM packetization for AAC",
1934 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_FLAG_AAC_LATM }, 0, INT_MAX,
1935 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_flags" },
1936 { "pat_pmt_at_frames", "Reemit PAT and PMT at each video frame",
1937 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_FLAG_PAT_PMT_AT_FRAMES}, 0, INT_MAX,
1938 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_flags" },
1939 { "system_b", "Conform to System B (DVB) instead of System A (ATSC)",
1940 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_FLAG_SYSTEM_B }, 0, INT_MAX,
1941 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_flags" },
1942 { "initial_discontinuity", "Mark initial packets as discontinuous",
1943 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_FLAG_DISCONT }, 0, INT_MAX,
1944 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_flags" },
1945 // backward compatibility
1946 { "resend_headers", "Reemit PAT/PMT before writing the next packet",
1947 offsetof(MpegTSWrite, reemit_pat_pmt), AV_OPT_TYPE_INT,
1948 { .i64 = 0 }, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
1949 { "mpegts_copyts", "don't offset dts/pts",
1950 offsetof(MpegTSWrite, copyts), AV_OPT_TYPE_BOOL,
1951 { .i64 = -1 }, -1, 1, AV_OPT_FLAG_ENCODING_PARAM },
1952 { "tables_version", "set PAT, PMT and SDT version",
1953 offsetof(MpegTSWrite, tables_version), AV_OPT_TYPE_INT,
1954 { .i64 = 0 }, 0, 31, AV_OPT_FLAG_ENCODING_PARAM },
1955 { "omit_video_pes_length", "Omit the PES packet length for video packets",
1956 offsetof(MpegTSWrite, omit_video_pes_length), AV_OPT_TYPE_BOOL,
1957 { .i64 = 1 }, 0, 1, AV_OPT_FLAG_ENCODING_PARAM },
1958 { "pcr_period", "PCR retransmission time in milliseconds",
1959 offsetof(MpegTSWrite, pcr_period), AV_OPT_TYPE_INT,
1960 { .i64 = PCR_RETRANS_TIME }, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
1961 { "pat_period", "PAT/PMT retransmission time limit in seconds",
1962 offsetof(MpegTSWrite, pat_period), AV_OPT_TYPE_DOUBLE,
1963 { .dbl = INT_MAX }, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
1964 { "sdt_period", "SDT retransmission time limit in seconds",
1965 offsetof(MpegTSWrite, sdt_period), AV_OPT_TYPE_DOUBLE,
1966 { .dbl = INT_MAX }, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
1970 static const AVClass mpegts_muxer_class = {
1971 .class_name = "MPEGTS muxer",
1972 .item_name = av_default_item_name,
1974 .version = LIBAVUTIL_VERSION_INT,
1977 AVOutputFormat ff_mpegts_muxer = {
1979 .long_name = NULL_IF_CONFIG_SMALL("MPEG-TS (MPEG-2 Transport Stream)"),
1980 .mime_type = "video/MP2T",
1981 .extensions = "ts,m2t,m2ts,mts",
1982 .priv_data_size = sizeof(MpegTSWrite),
1983 .audio_codec = AV_CODEC_ID_MP2,
1984 .video_codec = AV_CODEC_ID_MPEG2VIDEO,
1985 .init = mpegts_init,
1986 .write_packet = mpegts_write_packet,
1987 .write_trailer = mpegts_write_end,
1988 .deinit = mpegts_deinit,
1989 .check_bitstream = mpegts_check_bitstream,
1990 .flags = AVFMT_ALLOW_FLUSH | AVFMT_VARIABLE_FPS | AVFMT_NODIMENSIONS,
1991 .priv_class = &mpegts_muxer_class,