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;
88 int mux_rate; ///< set to 1 when VBR
91 int transport_stream_id;
92 int original_network_id;
100 int reemit_pat_pmt; // backward compatibility
103 #define MPEGTS_FLAG_REEMIT_PAT_PMT 0x01
104 #define MPEGTS_FLAG_AAC_LATM 0x02
105 #define MPEGTS_FLAG_PAT_PMT_AT_FRAMES 0x04
106 #define MPEGTS_FLAG_SYSTEM_B 0x08
107 #define MPEGTS_FLAG_DISCONT 0x10
116 int omit_video_pes_length;
119 /* a PES packet header is generated every DEFAULT_PES_HEADER_FREQ packets */
120 #define DEFAULT_PES_HEADER_FREQ 16
121 #define DEFAULT_PES_PAYLOAD_SIZE ((DEFAULT_PES_HEADER_FREQ - 1) * 184 + 170)
123 /* The section length is 12 bits. The first 2 are set to 0, the remaining
124 * 10 bits should not exceed 1021. */
125 #define SECTION_LENGTH 1020
127 /* NOTE: 4 bytes must be left at the end for the crc32 */
128 static void mpegts_write_section(MpegTSSection *s, uint8_t *buf, int len)
131 unsigned char packet[TS_PACKET_SIZE];
132 const unsigned char *buf_ptr;
134 int first, b, len1, left;
136 crc = av_bswap32(av_crc(av_crc_get_table(AV_CRC_32_IEEE),
139 buf[len - 4] = (crc >> 24) & 0xff;
140 buf[len - 3] = (crc >> 16) & 0xff;
141 buf[len - 2] = (crc >> 8) & 0xff;
142 buf[len - 1] = crc & 0xff;
144 /* send each packet */
147 first = buf == buf_ptr;
155 s->cc = s->cc + 1 & 0xf;
157 if (s->discontinuity) {
161 s->discontinuity = 0;
164 *q++ = 0; /* 0 offset */
165 len1 = TS_PACKET_SIZE - (q - packet);
168 memcpy(q, buf_ptr, len1);
170 /* add known padding data */
171 left = TS_PACKET_SIZE - (q - packet);
173 memset(q, 0xff, left);
175 s->write_packet(s, packet);
182 static inline void put16(uint8_t **q_ptr, int val)
191 static int mpegts_write_section1(MpegTSSection *s, int tid, int id,
192 int version, int sec_num, int last_sec_num,
193 uint8_t *buf, int len)
195 uint8_t section[1024], *q;
196 unsigned int tot_len;
197 /* reserved_future_use field must be set to 1 for SDT */
198 unsigned int flags = tid == SDT_TID ? 0xf000 : 0xb000;
200 tot_len = 3 + 5 + len + 4;
201 /* check if not too big */
203 return AVERROR_INVALIDDATA;
207 put16(&q, flags | (len + 5 + 4)); /* 5 byte header + 4 byte CRC */
209 *q++ = 0xc1 | (version << 1); /* current_next_indicator = 1 */
214 mpegts_write_section(s, section, tot_len);
218 /*********************************************/
221 #define DEFAULT_PROVIDER_NAME "FFmpeg"
222 #define DEFAULT_SERVICE_NAME "Service"
224 /* we retransmit the SI info at this rate */
225 #define SDT_RETRANS_TIME 500
226 #define PAT_RETRANS_TIME 100
227 #define PCR_RETRANS_TIME 20
229 typedef struct MpegTSWriteStream {
230 int pid; /* stream associated pid */
234 int first_pts_check; ///< first pts check needed
235 int prev_payload_key;
240 AVFormatContext *amux;
242 int64_t pcr_period; /* PCR period in PCR time base */
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 char default_service_name[32];
753 const char *service_name;
754 const char *provider_name;
756 title = av_dict_get(metadata, "service_name", NULL, 0);
758 title = av_dict_get(metadata, "title", NULL, 0);
759 snprintf(default_service_name, sizeof(default_service_name), "%s%02d", DEFAULT_SERVICE_NAME, ts->nb_services + 1);
760 service_name = title ? title->value : default_service_name;
761 provider = av_dict_get(metadata, "service_provider", NULL, 0);
762 provider_name = provider ? provider->value : DEFAULT_PROVIDER_NAME;
764 service = av_mallocz(sizeof(MpegTSService));
767 service->pmt.pid = ts->pmt_start_pid + ts->nb_services;
769 service->pcr_pid = 0x1fff;
770 if (encode_str8(service->provider_name, provider_name) < 0 ||
771 encode_str8(service->name, service_name) < 0) {
772 av_log(s, AV_LOG_ERROR, "Too long service or provider name\n");
775 if (av_dynarray_add_nofree(&ts->services, &ts->nb_services, service) < 0)
778 service->pmt.write_packet = section_write_packet;
779 service->pmt.opaque = s;
780 service->pmt.cc = 15;
781 service->pmt.discontinuity= ts->flags & MPEGTS_FLAG_DISCONT;
782 service->program = program;
790 static void enable_pcr_generation_for_stream(AVFormatContext *s, AVStream *pcr_st)
792 MpegTSWrite *ts = s->priv_data;
793 MpegTSWriteStream *ts_st = pcr_st->priv_data;
795 if (ts->mux_rate > 1) {
796 ts_st->pcr_period = av_rescale(ts->pcr_period, PCR_TIME_BASE, 1000);
798 /* For VBR we select the highest multiple of frame duration which is less than 100 ms. */
799 int64_t frame_period = 0;
800 if (pcr_st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
801 int frame_size = av_get_audio_frame_duration2(pcr_st->codecpar, 0);
803 av_log(s, AV_LOG_WARNING, "frame size not set\n");
806 frame_period = av_rescale_rnd(frame_size, PCR_TIME_BASE, pcr_st->codecpar->sample_rate, AV_ROUND_UP);
807 } else if (pcr_st->avg_frame_rate.num) {
808 frame_period = av_rescale_rnd(pcr_st->avg_frame_rate.den, PCR_TIME_BASE, pcr_st->avg_frame_rate.num, AV_ROUND_UP);
810 if (frame_period > 0 && frame_period <= PCR_TIME_BASE / 10)
811 ts_st->pcr_period = frame_period * (PCR_TIME_BASE / 10 / frame_period);
813 ts_st->pcr_period = 1;
816 // output a PCR as soon as possible
817 ts_st->last_pcr = ts->first_pcr - ts_st->pcr_period;
820 static void select_pcr_streams(AVFormatContext *s)
822 MpegTSWrite *ts = s->priv_data;
824 for (int i = 0; i < ts->nb_services; i++) {
825 MpegTSService *service = ts->services[i];
826 AVStream *pcr_st = NULL;
827 AVProgram *program = service->program;
828 int nb_streams = program ? program->nb_stream_indexes : s->nb_streams;
830 for (int j = 0; j < nb_streams; j++) {
831 AVStream *st = s->streams[program ? program->stream_index[j] : j];
833 pcr_st->codecpar->codec_type != AVMEDIA_TYPE_VIDEO && st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
840 MpegTSWriteStream *ts_st = pcr_st->priv_data;
841 service->pcr_pid = ts_st->pid;
842 enable_pcr_generation_for_stream(s, pcr_st);
843 av_log(s, AV_LOG_VERBOSE, "service %i using PCR in pid=%i, pcr_period=%"PRId64"ms\n",
844 service->sid, service->pcr_pid, av_rescale(ts_st->pcr_period, 1000, PCR_TIME_BASE));
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 avpriv_set_pts_info(st, 33, 1, 90000);
910 ts_st->payload = av_mallocz(ts->pes_payload_size);
911 if (!ts_st->payload) {
912 ret = AVERROR(ENOMEM);
916 /* MPEG pid values < 16 are reserved. Applications which set st->id in
917 * this range are assigned a calculated pid. */
919 ts_st->pid = ts->start_pid + i;
920 } else if (st->id < 0x1FFF) {
923 av_log(s, AV_LOG_ERROR,
924 "Invalid stream id %d, must be less than 8191\n", st->id);
925 ret = AVERROR(EINVAL);
928 for (j = 0; j < ts->nb_services; j++) {
929 if (ts_st->pid == ts->services[j]->pmt.pid) {
930 av_log(s, AV_LOG_ERROR, "Duplicate stream id %d\n", ts_st->pid);
931 ret = AVERROR(EINVAL);
935 for (j = 0; j < i; j++) {
936 if (pids[j] == ts_st->pid) {
937 av_log(s, AV_LOG_ERROR, "Duplicate stream id %d\n", ts_st->pid);
938 ret = AVERROR(EINVAL);
942 pids[i] = ts_st->pid;
943 ts_st->payload_pts = AV_NOPTS_VALUE;
944 ts_st->payload_dts = AV_NOPTS_VALUE;
945 ts_st->first_pts_check = 1;
947 ts_st->discontinuity = ts->flags & MPEGTS_FLAG_DISCONT;
948 if (st->codecpar->codec_id == AV_CODEC_ID_AAC &&
949 st->codecpar->extradata_size > 0) {
951 ts_st->amux = avformat_alloc_context();
953 ret = AVERROR(ENOMEM);
956 ts_st->amux->oformat =
957 av_guess_format((ts->flags & MPEGTS_FLAG_AAC_LATM) ? "latm" : "adts",
959 if (!ts_st->amux->oformat) {
960 ret = AVERROR(EINVAL);
963 if (!(ast = avformat_new_stream(ts_st->amux, NULL))) {
964 ret = AVERROR(ENOMEM);
967 ret = avcodec_parameters_copy(ast->codecpar, st->codecpar);
970 ast->time_base = st->time_base;
971 ret = avformat_write_header(ts_st->amux, NULL);
975 if (st->codecpar->codec_id == AV_CODEC_ID_OPUS) {
976 ts_st->opus_pending_trim_start = st->codecpar->initial_padding * 48000 / st->codecpar->sample_rate;
982 if (ts->mux_rate > 1) {
983 ts->sdt_packet_period = (int64_t)ts->mux_rate * SDT_RETRANS_TIME /
984 (TS_PACKET_SIZE * 8 * 1000);
985 ts->pat_packet_period = (int64_t)ts->mux_rate * PAT_RETRANS_TIME /
986 (TS_PACKET_SIZE * 8 * 1000);
988 /* Arbitrary values, PAT/PMT will also be written on video key frames */
989 ts->sdt_packet_period = 200;
990 ts->pat_packet_period = 40;
994 ts->first_pcr = av_rescale(s->max_delay, PCR_TIME_BASE, AV_TIME_BASE);
996 select_pcr_streams(s);
998 ts->last_pat_ts = AV_NOPTS_VALUE;
999 ts->last_sdt_ts = AV_NOPTS_VALUE;
1000 // The user specified a period, use only it
1001 if (ts->pat_period < INT_MAX/2) {
1002 ts->pat_packet_period = INT_MAX;
1004 if (ts->sdt_period < INT_MAX/2) {
1005 ts->sdt_packet_period = INT_MAX;
1008 ts->pat_packet_count = ts->pat_packet_period - 1;
1009 ts->sdt_packet_count = ts->sdt_packet_period - 1;
1011 if (ts->mux_rate == 1)
1012 av_log(s, AV_LOG_VERBOSE, "muxrate VBR, ");
1014 av_log(s, AV_LOG_VERBOSE, "muxrate %d, ", ts->mux_rate);
1015 av_log(s, AV_LOG_VERBOSE,
1016 "sdt every %d, pat/pmt every %d pkts\n",
1017 ts->sdt_packet_period, ts->pat_packet_period);
1019 if (ts->m2ts_mode == -1) {
1020 if (av_match_ext(s->url, "m2ts")) {
1034 /* send SDT, PAT and PMT tables regularly */
1035 static void retransmit_si_info(AVFormatContext *s, int force_pat, int64_t dts)
1037 MpegTSWrite *ts = s->priv_data;
1040 if (++ts->sdt_packet_count == ts->sdt_packet_period ||
1041 (dts != AV_NOPTS_VALUE && ts->last_sdt_ts == AV_NOPTS_VALUE) ||
1042 (dts != AV_NOPTS_VALUE && dts - ts->last_sdt_ts >= ts->sdt_period*90000.0)
1044 ts->sdt_packet_count = 0;
1045 if (dts != AV_NOPTS_VALUE)
1046 ts->last_sdt_ts = FFMAX(dts, ts->last_sdt_ts);
1047 mpegts_write_sdt(s);
1049 if (++ts->pat_packet_count == ts->pat_packet_period ||
1050 (dts != AV_NOPTS_VALUE && ts->last_pat_ts == AV_NOPTS_VALUE) ||
1051 (dts != AV_NOPTS_VALUE && dts - ts->last_pat_ts >= ts->pat_period*90000.0) ||
1053 ts->pat_packet_count = 0;
1054 if (dts != AV_NOPTS_VALUE)
1055 ts->last_pat_ts = FFMAX(dts, ts->last_pat_ts);
1056 mpegts_write_pat(s);
1057 for (i = 0; i < ts->nb_services; i++)
1058 mpegts_write_pmt(s, ts->services[i]);
1062 static int write_pcr_bits(uint8_t *buf, int64_t pcr)
1064 int64_t pcr_low = pcr % 300, pcr_high = pcr / 300;
1066 *buf++ = pcr_high >> 25;
1067 *buf++ = pcr_high >> 17;
1068 *buf++ = pcr_high >> 9;
1069 *buf++ = pcr_high >> 1;
1070 *buf++ = pcr_high << 7 | pcr_low >> 8 | 0x7e;
1076 /* Write a single null transport stream packet */
1077 static void mpegts_insert_null_packet(AVFormatContext *s)
1080 uint8_t buf[TS_PACKET_SIZE];
1087 memset(q, 0x0FF, TS_PACKET_SIZE - (q - buf));
1088 mpegts_prefix_m2ts_header(s);
1089 avio_write(s->pb, buf, TS_PACKET_SIZE);
1092 /* Write a single transport stream packet with a PCR and no payload */
1093 static void mpegts_insert_pcr_only(AVFormatContext *s, AVStream *st)
1095 MpegTSWrite *ts = s->priv_data;
1096 MpegTSWriteStream *ts_st = st->priv_data;
1098 uint8_t buf[TS_PACKET_SIZE];
1102 *q++ = ts_st->pid >> 8;
1104 *q++ = 0x20 | ts_st->cc; /* Adaptation only */
1105 /* Continuity Count field does not increment (see 13818-1 section 2.4.3.3) */
1106 *q++ = TS_PACKET_SIZE - 5; /* Adaptation Field Length */
1107 *q++ = 0x10; /* Adaptation flags: PCR present */
1108 if (ts_st->discontinuity) {
1110 ts_st->discontinuity = 0;
1113 /* PCR coded into 6 bytes */
1114 q += write_pcr_bits(q, get_pcr(ts, s->pb));
1116 /* stuffing bytes */
1117 memset(q, 0xFF, TS_PACKET_SIZE - (q - buf));
1118 mpegts_prefix_m2ts_header(s);
1119 avio_write(s->pb, buf, TS_PACKET_SIZE);
1122 static void write_pts(uint8_t *q, int fourbits, int64_t pts)
1126 val = fourbits << 4 | (((pts >> 30) & 0x07) << 1) | 1;
1128 val = (((pts >> 15) & 0x7fff) << 1) | 1;
1131 val = (((pts) & 0x7fff) << 1) | 1;
1136 /* Set an adaptation field flag in an MPEG-TS packet*/
1137 static void set_af_flag(uint8_t *pkt, int flag)
1139 // expect at least one flag to set
1142 if ((pkt[3] & 0x20) == 0) {
1143 // no AF yet, set adaptation field flag
1145 // 1 byte length, no flags
1152 /* Extend the adaptation field by size bytes */
1153 static void extend_af(uint8_t *pkt, int size)
1155 // expect already existing adaptation field
1156 av_assert0(pkt[3] & 0x20);
1160 /* Get a pointer to MPEG-TS payload (right after TS packet header) */
1161 static uint8_t *get_ts_payload_start(uint8_t *pkt)
1164 return pkt + 5 + pkt[4];
1169 /* Add a PES header to the front of the payload, and segment into an integer
1170 * number of TS packets. The final TS packet is padded using an oversized
1171 * adaptation header to exactly fill the last TS packet.
1172 * NOTE: 'payload' contains a complete PES payload. */
1173 static void mpegts_write_pes(AVFormatContext *s, AVStream *st,
1174 const uint8_t *payload, int payload_size,
1175 int64_t pts, int64_t dts, int key, int stream_id)
1177 MpegTSWriteStream *ts_st = st->priv_data;
1178 MpegTSWrite *ts = s->priv_data;
1179 uint8_t buf[TS_PACKET_SIZE];
1181 int val, is_start, len, header_len, write_pcr, is_dvb_subtitle, is_dvb_teletext, flags;
1182 int afc_len, stuffing_len;
1183 int64_t delay = av_rescale(s->max_delay, 90000, AV_TIME_BASE);
1184 int force_pat = st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO && key && !ts_st->prev_payload_key;
1186 av_assert0(ts_st->payload != buf || st->codecpar->codec_type != AVMEDIA_TYPE_VIDEO);
1187 if (ts->flags & MPEGTS_FLAG_PAT_PMT_AT_FRAMES && st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
1192 while (payload_size > 0) {
1193 int64_t pcr = -1; /* avoid warning */
1195 retransmit_si_info(s, force_pat, dts);
1199 if (ts->mux_rate > 1) {
1200 /* Send PCR packets for all PCR streams if needed */
1201 pcr = get_pcr(ts, s->pb);
1202 if (pcr >= ts->next_pcr) {
1203 int64_t next_pcr = INT64_MAX;
1204 for (int i = 0; i < s->nb_streams; i++) {
1205 /* Make the current stream the last, because for that we
1206 * can insert the pcr into the payload later */
1207 int st2_index = i < st->index ? i : (i + 1 == s->nb_streams ? st->index : i + 1);
1208 AVStream *st2 = s->streams[st2_index];
1209 MpegTSWriteStream *ts_st2 = st2->priv_data;
1210 if (ts_st2->pcr_period) {
1211 if (pcr - ts_st2->last_pcr >= ts_st2->pcr_period) {
1212 ts_st2->last_pcr = FFMAX(pcr - ts_st2->pcr_period, ts_st2->last_pcr + ts_st2->pcr_period);
1214 mpegts_insert_pcr_only(s, st2);
1215 pcr = get_pcr(ts, s->pb);
1220 next_pcr = FFMIN(next_pcr, ts_st2->last_pcr + ts_st2->pcr_period);
1223 ts->next_pcr = next_pcr;
1225 } else if (ts_st->pcr_period && dts != AV_NOPTS_VALUE) {
1226 pcr = (dts - delay) * 300;
1227 if (pcr - ts_st->last_pcr >= ts_st->pcr_period && is_start) {
1228 ts_st->last_pcr = FFMAX(pcr - ts_st->pcr_period, ts_st->last_pcr + ts_st->pcr_period);
1233 if (ts->mux_rate > 1 && dts != AV_NOPTS_VALUE &&
1234 (dts - get_pcr(ts, s->pb) / 300) > delay) {
1235 /* pcr insert gets priority over null packet insert */
1237 mpegts_insert_pcr_only(s, st);
1239 mpegts_insert_null_packet(s);
1240 /* recalculate write_pcr and possibly retransmit si_info */
1244 /* prepare packet header */
1247 val = ts_st->pid >> 8;
1252 ts_st->cc = ts_st->cc + 1 & 0xf;
1253 *q++ = 0x10 | ts_st->cc; // payload indicator + CC
1254 if (ts_st->discontinuity) {
1255 set_af_flag(buf, 0x80);
1256 q = get_ts_payload_start(buf);
1257 ts_st->discontinuity = 0;
1259 if (key && is_start && pts != AV_NOPTS_VALUE) {
1260 // set Random Access for key frames
1261 if (ts_st->pcr_period)
1263 set_af_flag(buf, 0x40);
1264 q = get_ts_payload_start(buf);
1267 set_af_flag(buf, 0x10);
1268 q = get_ts_payload_start(buf);
1269 // add 11, pcr references the last byte of program clock reference base
1270 if (dts != AV_NOPTS_VALUE && dts < pcr / 300)
1271 av_log(s, AV_LOG_WARNING, "dts < pcr, TS is invalid\n");
1272 extend_af(buf, write_pcr_bits(q, pcr));
1273 q = get_ts_payload_start(buf);
1276 int pes_extension = 0;
1277 int pes_header_stuffing_bytes = 0;
1278 /* write PES header */
1282 is_dvb_subtitle = 0;
1283 is_dvb_teletext = 0;
1284 if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
1285 if (st->codecpar->codec_id == AV_CODEC_ID_DIRAC)
1289 } else if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO &&
1290 (st->codecpar->codec_id == AV_CODEC_ID_MP2 ||
1291 st->codecpar->codec_id == AV_CODEC_ID_MP3 ||
1292 st->codecpar->codec_id == AV_CODEC_ID_AAC)) {
1294 } else if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO &&
1295 st->codecpar->codec_id == AV_CODEC_ID_AC3 &&
1298 } else if (st->codecpar->codec_type == AVMEDIA_TYPE_DATA &&
1299 st->codecpar->codec_id == AV_CODEC_ID_TIMED_ID3) {
1301 } else if (st->codecpar->codec_type == AVMEDIA_TYPE_DATA) {
1302 *q++ = stream_id != -1 ? stream_id : 0xfc;
1304 if (stream_id == 0xbd) /* asynchronous KLV */
1305 pts = dts = AV_NOPTS_VALUE;
1308 if (st->codecpar->codec_type == AVMEDIA_TYPE_SUBTITLE) {
1309 if (st->codecpar->codec_id == AV_CODEC_ID_DVB_SUBTITLE) {
1310 is_dvb_subtitle = 1;
1311 } else if (st->codecpar->codec_id == AV_CODEC_ID_DVB_TELETEXT) {
1312 is_dvb_teletext = 1;
1318 if (pts != AV_NOPTS_VALUE) {
1322 if (dts != AV_NOPTS_VALUE && pts != AV_NOPTS_VALUE && dts != pts) {
1326 if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO &&
1327 st->codecpar->codec_id == AV_CODEC_ID_DIRAC) {
1328 /* set PES_extension_flag */
1332 /* One byte for PES2 extension flag +
1333 * one byte for extension length +
1334 * one byte for extension id */
1337 /* for Blu-ray AC3 Audio the PES Extension flag should be as follow
1338 * otherwise it will not play sound on blu-ray
1340 if (ts->m2ts_mode &&
1341 st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO &&
1342 st->codecpar->codec_id == AV_CODEC_ID_AC3) {
1343 /* set PES_extension_flag */
1348 if (is_dvb_teletext) {
1349 pes_header_stuffing_bytes = 0x24 - header_len;
1352 len = payload_size + header_len + 3;
1353 /* 3 extra bytes should be added to DVB subtitle payload: 0x20 0x00 at the beginning and trailing 0xff */
1354 if (is_dvb_subtitle) {
1360 if (ts->omit_video_pes_length && st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
1366 /* data alignment indicator is required for subtitle and data streams */
1367 if (st->codecpar->codec_type == AVMEDIA_TYPE_SUBTITLE || st->codecpar->codec_type == AVMEDIA_TYPE_DATA)
1372 if (pts != AV_NOPTS_VALUE) {
1373 write_pts(q, flags >> 6, pts);
1376 if (dts != AV_NOPTS_VALUE && pts != AV_NOPTS_VALUE && dts != pts) {
1377 write_pts(q, 1, dts);
1380 if (pes_extension && st->codecpar->codec_id == AV_CODEC_ID_DIRAC) {
1381 flags = 0x01; /* set PES_extension_flag_2 */
1383 *q++ = 0x80 | 0x01; /* marker bit + extension length */
1384 /* Set the stream ID extension flag bit to 0 and
1385 * write the extended stream ID. */
1388 /* For Blu-ray AC3 Audio Setting extended flags */
1389 if (ts->m2ts_mode &&
1391 st->codecpar->codec_id == AV_CODEC_ID_AC3) {
1392 flags = 0x01; /* set PES_extension_flag_2 */
1394 *q++ = 0x80 | 0x01; /* marker bit + extension length */
1395 *q++ = 0x00 | 0x71; /* for AC3 Audio (specifically on blue-rays) */
1399 if (is_dvb_subtitle) {
1400 /* First two fields of DVB subtitles PES data:
1401 * data_identifier: for DVB subtitle streams shall be coded with the value 0x20
1402 * subtitle_stream_id: for DVB subtitle stream shall be identified by the value 0x00 */
1406 if (is_dvb_teletext) {
1407 memset(q, 0xff, pes_header_stuffing_bytes);
1408 q += pes_header_stuffing_bytes;
1413 header_len = q - buf;
1415 len = TS_PACKET_SIZE - header_len;
1416 if (len > payload_size)
1418 stuffing_len = TS_PACKET_SIZE - header_len - len;
1419 if (stuffing_len > 0) {
1420 /* add stuffing with AFC */
1421 if (buf[3] & 0x20) {
1422 /* stuffing already present: increase its size */
1423 afc_len = buf[4] + 1;
1424 memmove(buf + 4 + afc_len + stuffing_len,
1426 header_len - (4 + afc_len));
1427 buf[4] += stuffing_len;
1428 memset(buf + 4 + afc_len, 0xff, stuffing_len);
1431 memmove(buf + 4 + stuffing_len, buf + 4, header_len - 4);
1433 buf[4] = stuffing_len - 1;
1434 if (stuffing_len >= 2) {
1436 memset(buf + 6, 0xff, stuffing_len - 2);
1441 if (is_dvb_subtitle && payload_size == len) {
1442 memcpy(buf + TS_PACKET_SIZE - len, payload, len - 1);
1443 buf[TS_PACKET_SIZE - 1] = 0xff; /* end_of_PES_data_field_marker: an 8-bit field with fixed contents 0xff for DVB subtitle */
1445 memcpy(buf + TS_PACKET_SIZE - len, payload, len);
1449 payload_size -= len;
1450 mpegts_prefix_m2ts_header(s);
1451 avio_write(s->pb, buf, TS_PACKET_SIZE);
1453 ts_st->prev_payload_key = key;
1456 int ff_check_h264_startcode(AVFormatContext *s, const AVStream *st, const AVPacket *pkt)
1458 if (pkt->size < 5 || AV_RB32(pkt->data) != 0x0000001 && AV_RB24(pkt->data) != 0x000001) {
1459 if (!st->nb_frames) {
1460 av_log(s, AV_LOG_ERROR, "H.264 bitstream malformed, "
1461 "no startcode found, use the video bitstream filter 'h264_mp4toannexb' to fix it "
1462 "('-bsf:v h264_mp4toannexb' option with ffmpeg)\n");
1463 return AVERROR_INVALIDDATA;
1465 av_log(s, AV_LOG_WARNING, "H.264 bitstream error, startcode missing, size %d", pkt->size);
1467 av_log(s, AV_LOG_WARNING, " data %08"PRIX32, AV_RB32(pkt->data));
1468 av_log(s, AV_LOG_WARNING, "\n");
1473 static int check_hevc_startcode(AVFormatContext *s, const AVStream *st, const AVPacket *pkt)
1475 if (pkt->size < 5 || AV_RB32(pkt->data) != 0x0000001 && AV_RB24(pkt->data) != 0x000001) {
1476 if (!st->nb_frames) {
1477 av_log(s, AV_LOG_ERROR, "HEVC bitstream malformed, no startcode found\n");
1478 return AVERROR_PATCHWELCOME;
1480 av_log(s, AV_LOG_WARNING, "HEVC bitstream error, startcode missing, size %d", pkt->size);
1482 av_log(s, AV_LOG_WARNING, " data %08"PRIX32, AV_RB32(pkt->data));
1483 av_log(s, AV_LOG_WARNING, "\n");
1488 /* Based on GStreamer's gst-plugins-base/ext/ogg/gstoggstream.c
1489 * Released under the LGPL v2.1+, written by
1490 * Vincent Penquerc'h <vincent.penquerch@collabora.co.uk>
1492 static int opus_get_packet_samples(AVFormatContext *s, AVPacket *pkt)
1494 static const int durations[32] = {
1495 480, 960, 1920, 2880, /* Silk NB */
1496 480, 960, 1920, 2880, /* Silk MB */
1497 480, 960, 1920, 2880, /* Silk WB */
1498 480, 960, /* Hybrid SWB */
1499 480, 960, /* Hybrid FB */
1500 120, 240, 480, 960, /* CELT NB */
1501 120, 240, 480, 960, /* CELT NB */
1502 120, 240, 480, 960, /* CELT NB */
1503 120, 240, 480, 960, /* CELT NB */
1505 int toc, frame_duration, nframes, duration;
1512 frame_duration = durations[toc >> 3];
1526 nframes = pkt->data[1] & 63;
1530 duration = nframes * frame_duration;
1531 if (duration > 5760) {
1532 av_log(s, AV_LOG_WARNING,
1533 "Opus packet duration > 120 ms, invalid");
1540 static int mpegts_write_packet_internal(AVFormatContext *s, AVPacket *pkt)
1542 AVStream *st = s->streams[pkt->stream_index];
1543 int size = pkt->size;
1544 uint8_t *buf = pkt->data;
1545 uint8_t *data = NULL;
1546 MpegTSWrite *ts = s->priv_data;
1547 MpegTSWriteStream *ts_st = st->priv_data;
1548 const int64_t delay = av_rescale(s->max_delay, 90000, AV_TIME_BASE) * 2;
1549 int64_t dts = pkt->dts, pts = pkt->pts;
1550 int opus_samples = 0;
1552 uint8_t *side_data = NULL;
1555 side_data = av_packet_get_side_data(pkt,
1556 AV_PKT_DATA_MPEGTS_STREAM_ID,
1559 stream_id = side_data[0];
1561 if (ts->reemit_pat_pmt) {
1562 av_log(s, AV_LOG_WARNING,
1563 "resend_headers option is deprecated, use -mpegts_flags resend_headers\n");
1564 ts->reemit_pat_pmt = 0;
1565 ts->flags |= MPEGTS_FLAG_REEMIT_PAT_PMT;
1568 if (ts->flags & MPEGTS_FLAG_REEMIT_PAT_PMT) {
1569 ts->pat_packet_count = ts->pat_packet_period - 1;
1570 ts->sdt_packet_count = ts->sdt_packet_period - 1;
1571 ts->flags &= ~MPEGTS_FLAG_REEMIT_PAT_PMT;
1574 if (ts->copyts < 1) {
1575 if (pts != AV_NOPTS_VALUE)
1577 if (dts != AV_NOPTS_VALUE)
1581 if (ts_st->first_pts_check && pts == AV_NOPTS_VALUE) {
1582 av_log(s, AV_LOG_ERROR, "first pts value must be set\n");
1583 return AVERROR_INVALIDDATA;
1585 ts_st->first_pts_check = 0;
1587 if (st->codecpar->codec_id == AV_CODEC_ID_H264) {
1588 const uint8_t *p = buf, *buf_end = p + size;
1589 uint32_t state = -1;
1590 int extradd = (pkt->flags & AV_PKT_FLAG_KEY) ? st->codecpar->extradata_size : 0;
1591 int ret = ff_check_h264_startcode(s, st, pkt);
1595 if (extradd && AV_RB24(st->codecpar->extradata) > 1)
1599 p = avpriv_find_start_code(p, buf_end, &state);
1600 av_log(s, AV_LOG_TRACE, "nal %"PRId32"\n", state & 0x1f);
1601 if ((state & 0x1f) == 7)
1603 } while (p < buf_end && (state & 0x1f) != 9 &&
1604 (state & 0x1f) != 5 && (state & 0x1f) != 1);
1606 if ((state & 0x1f) != 5)
1608 if ((state & 0x1f) != 9) { // AUD NAL
1609 data = av_malloc(pkt->size + 6 + extradd);
1611 return AVERROR(ENOMEM);
1612 memcpy(data + 6, st->codecpar->extradata, extradd);
1613 memcpy(data + 6 + extradd, pkt->data, pkt->size);
1614 AV_WB32(data, 0x00000001);
1616 data[5] = 0xf0; // any slice type (0xe) + rbsp stop one bit
1618 size = pkt->size + 6 + extradd;
1620 } else if (st->codecpar->codec_id == AV_CODEC_ID_AAC) {
1621 if (pkt->size < 2) {
1622 av_log(s, AV_LOG_ERROR, "AAC packet too short\n");
1623 return AVERROR_INVALIDDATA;
1625 if ((AV_RB16(pkt->data) & 0xfff0) != 0xfff0) {
1630 av_log(s, AV_LOG_ERROR, "AAC bitstream not in ADTS format "
1631 "and extradata missing\n");
1633 av_init_packet(&pkt2);
1634 pkt2.data = pkt->data;
1635 pkt2.size = pkt->size;
1636 av_assert0(pkt->dts != AV_NOPTS_VALUE);
1637 pkt2.dts = av_rescale_q(pkt->dts, st->time_base, ts_st->amux->streams[0]->time_base);
1639 ret = avio_open_dyn_buf(&ts_st->amux->pb);
1641 return AVERROR(ENOMEM);
1643 ret = av_write_frame(ts_st->amux, &pkt2);
1645 ffio_free_dyn_buf(&ts_st->amux->pb);
1648 size = avio_close_dyn_buf(ts_st->amux->pb, &data);
1649 ts_st->amux->pb = NULL;
1653 } else if (st->codecpar->codec_id == AV_CODEC_ID_HEVC) {
1654 const uint8_t *p = buf, *buf_end = p + size;
1655 uint32_t state = -1;
1656 int extradd = (pkt->flags & AV_PKT_FLAG_KEY) ? st->codecpar->extradata_size : 0;
1657 int ret = check_hevc_startcode(s, st, pkt);
1661 if (extradd && AV_RB24(st->codecpar->extradata) > 1)
1665 p = avpriv_find_start_code(p, buf_end, &state);
1666 av_log(s, AV_LOG_TRACE, "nal %"PRId32"\n", (state & 0x7e)>>1);
1667 if ((state & 0x7e) == 2*32)
1669 } while (p < buf_end && (state & 0x7e) != 2*35 &&
1670 (state & 0x7e) >= 2*32);
1672 if ((state & 0x7e) < 2*16 && (state & 0x7e) >= 2*24)
1674 if ((state & 0x7e) != 2*35) { // AUD NAL
1675 data = av_malloc(pkt->size + 7 + extradd);
1677 return AVERROR(ENOMEM);
1678 memcpy(data + 7, st->codecpar->extradata, extradd);
1679 memcpy(data + 7 + extradd, pkt->data, pkt->size);
1680 AV_WB32(data, 0x00000001);
1683 data[6] = 0x50; // any slice type (0x4) + rbsp stop one bit
1685 size = pkt->size + 7 + extradd;
1687 } else if (st->codecpar->codec_id == AV_CODEC_ID_OPUS) {
1688 if (pkt->size < 2) {
1689 av_log(s, AV_LOG_ERROR, "Opus packet too short\n");
1690 return AVERROR_INVALIDDATA;
1693 /* Add Opus control header */
1694 if ((AV_RB16(pkt->data) >> 5) != 0x3ff) {
1698 int ctrl_header_size;
1699 int trim_start = 0, trim_end = 0;
1701 opus_samples = opus_get_packet_samples(s, pkt);
1703 side_data = av_packet_get_side_data(pkt,
1704 AV_PKT_DATA_SKIP_SAMPLES,
1707 if (side_data && side_data_size >= 10) {
1708 trim_end = AV_RL32(side_data + 4) * 48000 / st->codecpar->sample_rate;
1711 ctrl_header_size = pkt->size + 2 + pkt->size / 255 + 1;
1712 if (ts_st->opus_pending_trim_start)
1713 ctrl_header_size += 2;
1715 ctrl_header_size += 2;
1717 data = av_malloc(ctrl_header_size);
1719 return AVERROR(ENOMEM);
1723 if (ts_st->opus_pending_trim_start)
1731 data[i] = FFMIN(n, 255);
1736 av_assert0(2 + pkt->size / 255 + 1 == i);
1738 if (ts_st->opus_pending_trim_start) {
1739 trim_start = FFMIN(ts_st->opus_pending_trim_start, opus_samples);
1740 AV_WB16(data + i, trim_start);
1742 ts_st->opus_pending_trim_start -= trim_start;
1745 trim_end = FFMIN(trim_end, opus_samples - trim_start);
1746 AV_WB16(data + i, trim_end);
1750 memcpy(data + i, pkt->data, pkt->size);
1752 size = ctrl_header_size;
1754 /* TODO: Can we get TS formatted data here? If so we will
1755 * need to count the samples of that too! */
1756 av_log(s, AV_LOG_WARNING, "Got MPEG-TS formatted Opus data, unhandled");
1760 if (pkt->dts != AV_NOPTS_VALUE) {
1762 for(i=0; i<s->nb_streams; i++) {
1763 AVStream *st2 = s->streams[i];
1764 MpegTSWriteStream *ts_st2 = st2->priv_data;
1765 if ( ts_st2->payload_size
1766 && (ts_st2->payload_dts == AV_NOPTS_VALUE || dts - ts_st2->payload_dts > delay/2)) {
1767 mpegts_write_pes(s, st2, ts_st2->payload, ts_st2->payload_size,
1768 ts_st2->payload_pts, ts_st2->payload_dts,
1769 ts_st2->payload_flags & AV_PKT_FLAG_KEY, stream_id);
1770 ts_st2->payload_size = 0;
1775 if (ts_st->payload_size && (ts_st->payload_size + size > ts->pes_payload_size ||
1776 (dts != AV_NOPTS_VALUE && ts_st->payload_dts != AV_NOPTS_VALUE &&
1777 av_compare_ts(dts - ts_st->payload_dts, st->time_base,
1778 s->max_delay, AV_TIME_BASE_Q) >= 0) ||
1779 ts_st->opus_queued_samples + opus_samples >= 5760 /* 120ms */)) {
1780 mpegts_write_pes(s, st, ts_st->payload, ts_st->payload_size,
1781 ts_st->payload_pts, ts_st->payload_dts,
1782 ts_st->payload_flags & AV_PKT_FLAG_KEY, stream_id);
1783 ts_st->payload_size = 0;
1784 ts_st->opus_queued_samples = 0;
1787 if (st->codecpar->codec_type != AVMEDIA_TYPE_AUDIO || size > ts->pes_payload_size) {
1788 av_assert0(!ts_st->payload_size);
1789 // for video and subtitle, write a single pes packet
1790 mpegts_write_pes(s, st, buf, size, pts, dts,
1791 pkt->flags & AV_PKT_FLAG_KEY, stream_id);
1792 ts_st->opus_queued_samples = 0;
1797 if (!ts_st->payload_size) {
1798 ts_st->payload_pts = pts;
1799 ts_st->payload_dts = dts;
1800 ts_st->payload_flags = pkt->flags;
1803 memcpy(ts_st->payload + ts_st->payload_size, buf, size);
1804 ts_st->payload_size += size;
1805 ts_st->opus_queued_samples += opus_samples;
1812 static void mpegts_write_flush(AVFormatContext *s)
1816 /* flush current packets */
1817 for (i = 0; i < s->nb_streams; i++) {
1818 AVStream *st = s->streams[i];
1819 MpegTSWriteStream *ts_st = st->priv_data;
1820 if (ts_st->payload_size > 0) {
1821 mpegts_write_pes(s, st, ts_st->payload, ts_st->payload_size,
1822 ts_st->payload_pts, ts_st->payload_dts,
1823 ts_st->payload_flags & AV_PKT_FLAG_KEY, -1);
1824 ts_st->payload_size = 0;
1825 ts_st->opus_queued_samples = 0;
1830 static int mpegts_write_packet(AVFormatContext *s, AVPacket *pkt)
1833 mpegts_write_flush(s);
1836 return mpegts_write_packet_internal(s, pkt);
1840 static int mpegts_write_end(AVFormatContext *s)
1843 mpegts_write_flush(s);
1848 static void mpegts_deinit(AVFormatContext *s)
1850 MpegTSWrite *ts = s->priv_data;
1851 MpegTSService *service;
1854 for (i = 0; i < s->nb_streams; i++) {
1855 AVStream *st = s->streams[i];
1856 MpegTSWriteStream *ts_st = st->priv_data;
1858 av_freep(&ts_st->payload);
1860 avformat_free_context(ts_st->amux);
1866 for (i = 0; i < ts->nb_services; i++) {
1867 service = ts->services[i];
1870 av_freep(&ts->services);
1873 static int mpegts_check_bitstream(struct AVFormatContext *s, const AVPacket *pkt)
1876 AVStream *st = s->streams[pkt->stream_index];
1878 if (st->codecpar->codec_id == AV_CODEC_ID_H264) {
1879 if (pkt->size >= 5 && AV_RB32(pkt->data) != 0x0000001 &&
1880 (AV_RB24(pkt->data) != 0x000001 ||
1881 (st->codecpar->extradata_size > 0 &&
1882 st->codecpar->extradata[0] == 1)))
1883 ret = ff_stream_add_bitstream_filter(st, "h264_mp4toannexb", NULL);
1884 } else if (st->codecpar->codec_id == AV_CODEC_ID_HEVC) {
1885 if (pkt->size >= 5 && AV_RB32(pkt->data) != 0x0000001 &&
1886 (AV_RB24(pkt->data) != 0x000001 ||
1887 (st->codecpar->extradata_size > 0 &&
1888 st->codecpar->extradata[0] == 1)))
1889 ret = ff_stream_add_bitstream_filter(st, "hevc_mp4toannexb", NULL);
1895 static const AVOption options[] = {
1896 { "mpegts_transport_stream_id", "Set transport_stream_id field.",
1897 offsetof(MpegTSWrite, transport_stream_id), AV_OPT_TYPE_INT,
1898 { .i64 = 0x0001 }, 0x0001, 0xffff, AV_OPT_FLAG_ENCODING_PARAM },
1899 { "mpegts_original_network_id", "Set original_network_id field.",
1900 offsetof(MpegTSWrite, original_network_id), AV_OPT_TYPE_INT,
1901 { .i64 = DVB_PRIVATE_NETWORK_START }, 0x0001, 0xffff, AV_OPT_FLAG_ENCODING_PARAM },
1902 { "mpegts_service_id", "Set service_id field.",
1903 offsetof(MpegTSWrite, service_id), AV_OPT_TYPE_INT,
1904 { .i64 = 0x0001 }, 0x0001, 0xffff, AV_OPT_FLAG_ENCODING_PARAM },
1905 { "mpegts_service_type", "Set service_type field.",
1906 offsetof(MpegTSWrite, service_type), AV_OPT_TYPE_INT,
1907 { .i64 = 0x01 }, 0x01, 0xff, AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
1908 { "digital_tv", "Digital Television.",
1909 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_DIGITAL_TV }, 0x01, 0xff,
1910 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
1911 { "digital_radio", "Digital Radio.",
1912 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_DIGITAL_RADIO }, 0x01, 0xff,
1913 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
1914 { "teletext", "Teletext.",
1915 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_TELETEXT }, 0x01, 0xff,
1916 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
1917 { "advanced_codec_digital_radio", "Advanced Codec Digital Radio.",
1918 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_ADVANCED_CODEC_DIGITAL_RADIO }, 0x01, 0xff,
1919 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
1920 { "mpeg2_digital_hdtv", "MPEG2 Digital HDTV.",
1921 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_MPEG2_DIGITAL_HDTV }, 0x01, 0xff,
1922 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
1923 { "advanced_codec_digital_sdtv", "Advanced Codec Digital SDTV.",
1924 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_ADVANCED_CODEC_DIGITAL_SDTV }, 0x01, 0xff,
1925 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
1926 { "advanced_codec_digital_hdtv", "Advanced Codec Digital HDTV.",
1927 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_ADVANCED_CODEC_DIGITAL_HDTV }, 0x01, 0xff,
1928 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
1929 { "hevc_digital_hdtv", "HEVC Digital Television Service.",
1930 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_HEVC_DIGITAL_HDTV }, 0x01, 0xff,
1931 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
1932 { "mpegts_pmt_start_pid", "Set the first pid of the PMT.",
1933 offsetof(MpegTSWrite, pmt_start_pid), AV_OPT_TYPE_INT,
1934 { .i64 = 0x1000 }, 0x0010, 0x1f00, AV_OPT_FLAG_ENCODING_PARAM },
1935 { "mpegts_start_pid", "Set the first pid.",
1936 offsetof(MpegTSWrite, start_pid), AV_OPT_TYPE_INT,
1937 { .i64 = 0x0100 }, 0x0010, 0x0f00, AV_OPT_FLAG_ENCODING_PARAM },
1938 { "mpegts_m2ts_mode", "Enable m2ts mode.",
1939 offsetof(MpegTSWrite, m2ts_mode), AV_OPT_TYPE_BOOL,
1940 { .i64 = -1 }, -1, 1, AV_OPT_FLAG_ENCODING_PARAM },
1942 offsetof(MpegTSWrite, mux_rate), AV_OPT_TYPE_INT,
1943 { .i64 = 1 }, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
1944 { "pes_payload_size", "Minimum PES packet payload in bytes",
1945 offsetof(MpegTSWrite, pes_payload_size), AV_OPT_TYPE_INT,
1946 { .i64 = DEFAULT_PES_PAYLOAD_SIZE }, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
1947 { "mpegts_flags", "MPEG-TS muxing flags",
1948 offsetof(MpegTSWrite, flags), AV_OPT_TYPE_FLAGS, { .i64 = 0 }, 0, INT_MAX,
1949 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_flags" },
1950 { "resend_headers", "Reemit PAT/PMT before writing the next packet",
1951 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_FLAG_REEMIT_PAT_PMT }, 0, INT_MAX,
1952 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_flags" },
1953 { "latm", "Use LATM packetization for AAC",
1954 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_FLAG_AAC_LATM }, 0, INT_MAX,
1955 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_flags" },
1956 { "pat_pmt_at_frames", "Reemit PAT and PMT at each video frame",
1957 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_FLAG_PAT_PMT_AT_FRAMES}, 0, INT_MAX,
1958 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_flags" },
1959 { "system_b", "Conform to System B (DVB) instead of System A (ATSC)",
1960 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_FLAG_SYSTEM_B }, 0, INT_MAX,
1961 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_flags" },
1962 { "initial_discontinuity", "Mark initial packets as discontinuous",
1963 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_FLAG_DISCONT }, 0, INT_MAX,
1964 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_flags" },
1965 // backward compatibility
1966 { "resend_headers", "Reemit PAT/PMT before writing the next packet",
1967 offsetof(MpegTSWrite, reemit_pat_pmt), AV_OPT_TYPE_INT,
1968 { .i64 = 0 }, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
1969 { "mpegts_copyts", "don't offset dts/pts",
1970 offsetof(MpegTSWrite, copyts), AV_OPT_TYPE_BOOL,
1971 { .i64 = -1 }, -1, 1, AV_OPT_FLAG_ENCODING_PARAM },
1972 { "tables_version", "set PAT, PMT and SDT version",
1973 offsetof(MpegTSWrite, tables_version), AV_OPT_TYPE_INT,
1974 { .i64 = 0 }, 0, 31, AV_OPT_FLAG_ENCODING_PARAM },
1975 { "omit_video_pes_length", "Omit the PES packet length for video packets",
1976 offsetof(MpegTSWrite, omit_video_pes_length), AV_OPT_TYPE_BOOL,
1977 { .i64 = 1 }, 0, 1, AV_OPT_FLAG_ENCODING_PARAM },
1978 { "pcr_period", "PCR retransmission time in milliseconds",
1979 offsetof(MpegTSWrite, pcr_period), AV_OPT_TYPE_INT,
1980 { .i64 = PCR_RETRANS_TIME }, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
1981 { "pat_period", "PAT/PMT retransmission time limit in seconds",
1982 offsetof(MpegTSWrite, pat_period), AV_OPT_TYPE_DOUBLE,
1983 { .dbl = INT_MAX }, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
1984 { "sdt_period", "SDT retransmission time limit in seconds",
1985 offsetof(MpegTSWrite, sdt_period), AV_OPT_TYPE_DOUBLE,
1986 { .dbl = INT_MAX }, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
1990 static const AVClass mpegts_muxer_class = {
1991 .class_name = "MPEGTS muxer",
1992 .item_name = av_default_item_name,
1994 .version = LIBAVUTIL_VERSION_INT,
1997 AVOutputFormat ff_mpegts_muxer = {
1999 .long_name = NULL_IF_CONFIG_SMALL("MPEG-TS (MPEG-2 Transport Stream)"),
2000 .mime_type = "video/MP2T",
2001 .extensions = "ts,m2t,m2ts,mts",
2002 .priv_data_size = sizeof(MpegTSWrite),
2003 .audio_codec = AV_CODEC_ID_MP2,
2004 .video_codec = AV_CODEC_ID_MPEG2VIDEO,
2005 .init = mpegts_init,
2006 .write_packet = mpegts_write_packet,
2007 .write_trailer = mpegts_write_end,
2008 .deinit = mpegts_deinit,
2009 .check_bitstream = mpegts_check_bitstream,
2010 .flags = AVFMT_ALLOW_FLUSH | AVFMT_VARIABLE_FPS | AVFMT_NODIMENSIONS,
2011 .priv_class = &mpegts_muxer_class,