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;
101 #define MPEGTS_FLAG_REEMIT_PAT_PMT 0x01
102 #define MPEGTS_FLAG_AAC_LATM 0x02
103 #define MPEGTS_FLAG_PAT_PMT_AT_FRAMES 0x04
104 #define MPEGTS_FLAG_SYSTEM_B 0x08
105 #define MPEGTS_FLAG_DISCONT 0x10
114 int omit_video_pes_length;
117 /* a PES packet header is generated every DEFAULT_PES_HEADER_FREQ packets */
118 #define DEFAULT_PES_HEADER_FREQ 16
119 #define DEFAULT_PES_PAYLOAD_SIZE ((DEFAULT_PES_HEADER_FREQ - 1) * 184 + 170)
121 /* The section length is 12 bits. The first 2 are set to 0, the remaining
122 * 10 bits should not exceed 1021. */
123 #define SECTION_LENGTH 1020
125 /* NOTE: 4 bytes must be left at the end for the crc32 */
126 static void mpegts_write_section(MpegTSSection *s, uint8_t *buf, int len)
129 unsigned char packet[TS_PACKET_SIZE];
130 const unsigned char *buf_ptr;
132 int first, b, len1, left;
134 crc = av_bswap32(av_crc(av_crc_get_table(AV_CRC_32_IEEE),
137 buf[len - 4] = (crc >> 24) & 0xff;
138 buf[len - 3] = (crc >> 16) & 0xff;
139 buf[len - 2] = (crc >> 8) & 0xff;
140 buf[len - 1] = crc & 0xff;
142 /* send each packet */
145 first = buf == buf_ptr;
153 s->cc = s->cc + 1 & 0xf;
155 if (s->discontinuity) {
159 s->discontinuity = 0;
162 *q++ = 0; /* 0 offset */
163 len1 = TS_PACKET_SIZE - (q - packet);
166 memcpy(q, buf_ptr, len1);
168 /* add known padding data */
169 left = TS_PACKET_SIZE - (q - packet);
171 memset(q, 0xff, left);
173 s->write_packet(s, packet);
180 static inline void put16(uint8_t **q_ptr, int val)
189 static int mpegts_write_section1(MpegTSSection *s, int tid, int id,
190 int version, int sec_num, int last_sec_num,
191 uint8_t *buf, int len)
193 uint8_t section[1024], *q;
194 unsigned int tot_len;
195 /* reserved_future_use field must be set to 1 for SDT */
196 unsigned int flags = tid == SDT_TID ? 0xf000 : 0xb000;
198 tot_len = 3 + 5 + len + 4;
199 /* check if not too big */
201 return AVERROR_INVALIDDATA;
205 put16(&q, flags | (len + 5 + 4)); /* 5 byte header + 4 byte CRC */
207 *q++ = 0xc1 | (version << 1); /* current_next_indicator = 1 */
212 mpegts_write_section(s, section, tot_len);
216 /*********************************************/
219 #define DEFAULT_PROVIDER_NAME "FFmpeg"
220 #define DEFAULT_SERVICE_NAME "Service"
222 /* we retransmit the SI info at this rate */
223 #define SDT_RETRANS_TIME 500
224 #define PAT_RETRANS_TIME 100
225 #define PCR_RETRANS_TIME 20
227 typedef struct MpegTSWriteStream {
228 int pid; /* stream associated pid */
232 int first_pts_check; ///< first pts check needed
233 int prev_payload_key;
238 AVFormatContext *amux;
240 int64_t pcr_period; /* PCR period in PCR time base */
244 int opus_queued_samples;
245 int opus_pending_trim_start;
248 static void mpegts_write_pat(AVFormatContext *s)
250 MpegTSWrite *ts = s->priv_data;
251 MpegTSService *service;
252 uint8_t data[SECTION_LENGTH], *q;
256 for (i = 0; i < ts->nb_services; i++) {
257 service = ts->services[i];
258 put16(&q, service->sid);
259 put16(&q, 0xe000 | service->pmt.pid);
261 mpegts_write_section1(&ts->pat, PAT_TID, ts->tsid, ts->tables_version, 0, 0,
265 static void putbuf(uint8_t **q_ptr, const uint8_t *buf, size_t len)
267 memcpy(*q_ptr, buf, len);
271 static void put_registration_descriptor(uint8_t **q_ptr, uint32_t tag)
274 *q++ = 0x05; /* MPEG-2 registration descriptor*/
283 static int mpegts_write_pmt(AVFormatContext *s, MpegTSService *service)
285 MpegTSWrite *ts = s->priv_data;
286 uint8_t data[SECTION_LENGTH], *q, *desc_length_ptr, *program_info_length_ptr;
287 int val, stream_type, i, err = 0;
290 put16(&q, 0xe000 | service->pcr_pid);
292 program_info_length_ptr = q;
293 q += 2; /* patched after */
295 /* put program info here */
297 val = 0xf000 | (q - program_info_length_ptr - 2);
298 program_info_length_ptr[0] = val >> 8;
299 program_info_length_ptr[1] = val;
301 for (i = 0; i < s->nb_streams; i++) {
302 AVStream *st = s->streams[i];
303 MpegTSWriteStream *ts_st = st->priv_data;
304 AVDictionaryEntry *lang = av_dict_get(st->metadata, "language", NULL, 0);
306 if (s->nb_programs) {
308 AVProgram *program = service->program;
310 for (k = 0; k < program->nb_stream_indexes; k++)
311 if (program->stream_index[k] == i) {
320 if (q - data > SECTION_LENGTH - 32) {
324 switch (st->codecpar->codec_id) {
325 case AV_CODEC_ID_MPEG1VIDEO:
326 case AV_CODEC_ID_MPEG2VIDEO:
327 stream_type = STREAM_TYPE_VIDEO_MPEG2;
329 case AV_CODEC_ID_MPEG4:
330 stream_type = STREAM_TYPE_VIDEO_MPEG4;
332 case AV_CODEC_ID_H264:
333 stream_type = STREAM_TYPE_VIDEO_H264;
335 case AV_CODEC_ID_HEVC:
336 stream_type = STREAM_TYPE_VIDEO_HEVC;
338 case AV_CODEC_ID_CAVS:
339 stream_type = STREAM_TYPE_VIDEO_CAVS;
341 case AV_CODEC_ID_DIRAC:
342 stream_type = STREAM_TYPE_VIDEO_DIRAC;
344 case AV_CODEC_ID_VC1:
345 stream_type = STREAM_TYPE_VIDEO_VC1;
347 case AV_CODEC_ID_MP2:
348 case AV_CODEC_ID_MP3:
349 if ( st->codecpar->sample_rate > 0
350 && st->codecpar->sample_rate < 32000) {
351 stream_type = STREAM_TYPE_AUDIO_MPEG2;
353 stream_type = STREAM_TYPE_AUDIO_MPEG1;
356 case AV_CODEC_ID_AAC:
357 stream_type = (ts->flags & MPEGTS_FLAG_AAC_LATM)
358 ? STREAM_TYPE_AUDIO_AAC_LATM
359 : STREAM_TYPE_AUDIO_AAC;
361 case AV_CODEC_ID_AAC_LATM:
362 stream_type = STREAM_TYPE_AUDIO_AAC_LATM;
364 case AV_CODEC_ID_AC3:
365 stream_type = (ts->flags & MPEGTS_FLAG_SYSTEM_B)
366 ? STREAM_TYPE_PRIVATE_DATA
367 : STREAM_TYPE_AUDIO_AC3;
369 case AV_CODEC_ID_EAC3:
370 stream_type = (ts->flags & MPEGTS_FLAG_SYSTEM_B)
371 ? STREAM_TYPE_PRIVATE_DATA
372 : STREAM_TYPE_AUDIO_EAC3;
374 case AV_CODEC_ID_DTS:
375 stream_type = STREAM_TYPE_AUDIO_DTS;
377 case AV_CODEC_ID_TRUEHD:
378 stream_type = STREAM_TYPE_AUDIO_TRUEHD;
380 case AV_CODEC_ID_OPUS:
381 stream_type = STREAM_TYPE_PRIVATE_DATA;
383 case AV_CODEC_ID_TIMED_ID3:
384 stream_type = STREAM_TYPE_METADATA;
387 stream_type = STREAM_TYPE_PRIVATE_DATA;
392 put16(&q, 0xe000 | ts_st->pid);
394 q += 2; /* patched after */
396 /* write optional descriptors here */
397 switch (st->codecpar->codec_type) {
398 case AVMEDIA_TYPE_AUDIO:
399 if (st->codecpar->codec_id==AV_CODEC_ID_AC3 && (ts->flags & MPEGTS_FLAG_SYSTEM_B)) {
400 *q++=0x6a; // AC3 descriptor see A038 DVB SI
401 *q++=1; // 1 byte, all flags sets to 0
402 *q++=0; // omit all fields...
404 if (st->codecpar->codec_id==AV_CODEC_ID_EAC3 && (ts->flags & MPEGTS_FLAG_SYSTEM_B)) {
405 *q++=0x7a; // EAC3 descriptor see A038 DVB SI
406 *q++=1; // 1 byte, all flags sets to 0
407 *q++=0; // omit all fields...
409 if (st->codecpar->codec_id==AV_CODEC_ID_S302M)
410 put_registration_descriptor(&q, MKTAG('B', 'S', 'S', 'D'));
411 if (st->codecpar->codec_id==AV_CODEC_ID_OPUS) {
412 /* 6 bytes registration descriptor, 4 bytes Opus audio descriptor */
413 if (q - data > SECTION_LENGTH - 6 - 4) {
418 put_registration_descriptor(&q, MKTAG('O', 'p', 'u', 's'));
420 *q++ = 0x7f; /* DVB extension descriptor */
424 if (st->codecpar->extradata && st->codecpar->extradata_size >= 19) {
425 if (st->codecpar->extradata[18] == 0 && st->codecpar->channels <= 2) {
426 /* RTP mapping family */
427 *q++ = st->codecpar->channels;
428 } else if (st->codecpar->extradata[18] == 1 && st->codecpar->channels <= 8 &&
429 st->codecpar->extradata_size >= 21 + st->codecpar->channels) {
430 static const uint8_t coupled_stream_counts[9] = {
431 1, 0, 1, 1, 2, 2, 2, 3, 3
433 static const uint8_t channel_map_a[8][8] = {
440 {0, 4, 1, 2, 3, 5, 6},
441 {0, 6, 1, 2, 3, 4, 5, 7},
443 static const uint8_t channel_map_b[8][8] = {
450 {0, 1, 2, 3, 4, 5, 6},
451 {0, 1, 2, 3, 4, 5, 6, 7},
453 /* Vorbis mapping family */
455 if (st->codecpar->extradata[19] == st->codecpar->channels - coupled_stream_counts[st->codecpar->channels] &&
456 st->codecpar->extradata[20] == coupled_stream_counts[st->codecpar->channels] &&
457 memcmp(&st->codecpar->extradata[21], channel_map_a[st->codecpar->channels-1], st->codecpar->channels) == 0) {
458 *q++ = st->codecpar->channels;
459 } else if (st->codecpar->channels >= 2 && st->codecpar->extradata[19] == st->codecpar->channels &&
460 st->codecpar->extradata[20] == 0 &&
461 memcmp(&st->codecpar->extradata[21], channel_map_b[st->codecpar->channels-1], st->codecpar->channels) == 0) {
462 *q++ = st->codecpar->channels | 0x80;
464 /* Unsupported, could write an extended descriptor here */
465 av_log(s, AV_LOG_ERROR, "Unsupported Opus Vorbis-style channel mapping");
470 av_log(s, AV_LOG_ERROR, "Unsupported Opus channel mapping for family %d", st->codecpar->extradata[18]);
473 } else if (st->codecpar->channels <= 2) {
474 /* Assume RTP mapping family */
475 *q++ = st->codecpar->channels;
478 av_log(s, AV_LOG_ERROR, "Unsupported Opus channel mapping");
485 char *next = lang->value;
488 *q++ = 0x0a; /* ISO 639 language descriptor */
492 for (p = lang->value; next && *len_ptr < 255 / 4 * 4; p = next + 1) {
493 if (q - data > SECTION_LENGTH - 4) {
497 next = strchr(p, ',');
498 if (strlen(p) != 3 && (!next || next != p + 3))
499 continue; /* not a 3-letter code */
505 if (st->disposition & AV_DISPOSITION_CLEAN_EFFECTS)
507 else if (st->disposition & AV_DISPOSITION_HEARING_IMPAIRED)
509 else if (st->disposition & AV_DISPOSITION_VISUAL_IMPAIRED)
512 *q++ = 0; /* undefined type */
518 q -= 2; /* no language codes were written */
521 case AVMEDIA_TYPE_SUBTITLE:
523 const char default_language[] = "und";
524 const char *language = lang && strlen(lang->value) >= 3 ? lang->value : default_language;
526 if (st->codecpar->codec_id == AV_CODEC_ID_DVB_SUBTITLE) {
528 int extradata_copied = 0;
530 *q++ = 0x59; /* subtitling_descriptor */
533 while (strlen(language) >= 3) {
534 if (sizeof(data) - (q - data) < 8) { /* 8 bytes per DVB subtitle substream data */
542 if (*language != '\0')
545 if (st->codecpar->extradata_size - extradata_copied >= 5) {
546 *q++ = st->codecpar->extradata[extradata_copied + 4]; /* subtitling_type */
547 memcpy(q, st->codecpar->extradata + extradata_copied, 4); /* composition_page_id and ancillary_page_id */
548 extradata_copied += 5;
552 * 0x10 - normal with no monitor aspect ratio criticality
553 * 0x20 - for the hard of hearing with no monitor aspect ratio criticality */
554 *q++ = (st->disposition & AV_DISPOSITION_HEARING_IMPAIRED) ? 0x20 : 0x10;
555 if ((st->codecpar->extradata_size == 4) && (extradata_copied == 0)) {
556 /* support of old 4-byte extradata format */
557 memcpy(q, st->codecpar->extradata, 4); /* composition_page_id and ancillary_page_id */
558 extradata_copied += 4;
561 put16(&q, 1); /* composition_page_id */
562 put16(&q, 1); /* ancillary_page_id */
567 *len_ptr = q - len_ptr - 1;
568 } else if (st->codecpar->codec_id == AV_CODEC_ID_DVB_TELETEXT) {
569 uint8_t *len_ptr = NULL;
570 int extradata_copied = 0;
572 /* The descriptor tag. teletext_descriptor */
576 while (strlen(language) >= 3 && q - data < sizeof(data) - 6) {
581 if (*language != '\0')
584 if (st->codecpar->extradata_size - 1 > extradata_copied) {
585 memcpy(q, st->codecpar->extradata + extradata_copied, 2);
586 extradata_copied += 2;
589 /* The Teletext descriptor:
590 * teletext_type: This 5-bit field indicates the type of Teletext page indicated. (0x01 Initial Teletext page)
591 * teletext_magazine_number: This is a 3-bit field which identifies the magazine number.
592 * teletext_page_number: This is an 8-bit field giving two 4-bit hex digits identifying the page number. */
598 *len_ptr = q - len_ptr - 1;
602 case AVMEDIA_TYPE_VIDEO:
603 if (stream_type == STREAM_TYPE_VIDEO_DIRAC) {
604 put_registration_descriptor(&q, MKTAG('d', 'r', 'a', 'c'));
605 } else if (stream_type == STREAM_TYPE_VIDEO_VC1) {
606 put_registration_descriptor(&q, MKTAG('V', 'C', '-', '1'));
607 } else if (stream_type == STREAM_TYPE_VIDEO_HEVC && s->strict_std_compliance <= FF_COMPLIANCE_NORMAL) {
608 put_registration_descriptor(&q, MKTAG('H', 'E', 'V', 'C'));
611 case AVMEDIA_TYPE_DATA:
612 if (st->codecpar->codec_id == AV_CODEC_ID_SMPTE_KLV) {
613 put_registration_descriptor(&q, MKTAG('K', 'L', 'V', 'A'));
614 } else if (st->codecpar->codec_id == AV_CODEC_ID_TIMED_ID3) {
615 const char *tag = "ID3 ";
616 *q++ = 0x26; /* metadata descriptor */
618 put16(&q, 0xffff); /* metadata application format */
619 putbuf(&q, tag, strlen(tag));
620 *q++ = 0xff; /* metadata format */
621 putbuf(&q, tag, strlen(tag));
622 *q++ = 0; /* metadata service ID */
623 *q++ = 0xF; /* metadata_locator_record_flag|MPEG_carriage_flags|reserved */
628 val = 0xf000 | (q - desc_length_ptr - 2);
629 desc_length_ptr[0] = val >> 8;
630 desc_length_ptr[1] = val;
634 av_log(s, AV_LOG_ERROR,
635 "The PMT section cannot fit stream %d and all following streams.\n"
636 "Try reducing the number of languages in the audio streams "
637 "or the total number of streams.\n", i);
639 mpegts_write_section1(&service->pmt, PMT_TID, service->sid, ts->tables_version, 0, 0,
644 static void mpegts_write_sdt(AVFormatContext *s)
646 MpegTSWrite *ts = s->priv_data;
647 MpegTSService *service;
648 uint8_t data[SECTION_LENGTH], *q, *desc_list_len_ptr, *desc_len_ptr;
649 int i, running_status, free_ca_mode, val;
654 for (i = 0; i < ts->nb_services; i++) {
655 service = ts->services[i];
656 put16(&q, service->sid);
657 *q++ = 0xfc | 0x00; /* currently no EIT info */
658 desc_list_len_ptr = q;
660 running_status = 4; /* running */
663 /* write only one descriptor for the service name and provider */
667 *q++ = ts->service_type;
668 putbuf(&q, service->provider_name, service->provider_name[0] + 1);
669 putbuf(&q, service->name, service->name[0] + 1);
670 desc_len_ptr[0] = q - desc_len_ptr - 1;
672 /* fill descriptor length */
673 val = (running_status << 13) | (free_ca_mode << 12) |
674 (q - desc_list_len_ptr - 2);
675 desc_list_len_ptr[0] = val >> 8;
676 desc_list_len_ptr[1] = val;
678 mpegts_write_section1(&ts->sdt, SDT_TID, ts->tsid, ts->tables_version, 0, 0,
682 /* This stores a string in buf with the correct encoding and also sets the
683 * first byte as the length. !str is accepted for an empty string.
684 * If the string is already encoded, invalid UTF-8 or has no multibyte sequence
685 * then we keep it as is, otherwise we signal UTF-8 encoding. */
686 static int encode_str8(uint8_t *buf, const char *str)
691 str_len = strlen(str);
692 if (str[0] && (unsigned)str[0] >= 0x20) { /* Make sure the string is not already encoded. */
693 const uint8_t *q = str;
694 int has_multibyte = 0;
697 GET_UTF8(code, *q++, goto invalid;) /* Is it valid UTF-8? */
698 has_multibyte |= (code > 127); /* Does it have multibyte UTF-8 chars in it? */
700 if (has_multibyte) { /* If we have multibyte chars and valid UTF-8, then encode as such! */
702 return AVERROR(EINVAL);
703 buf[0] = str_len + 1;
705 memcpy(&buf[2], str, str_len);
710 /* Otherwise let's just encode the string as is! */
712 return AVERROR(EINVAL);
714 memcpy(&buf[1], str, str_len);
718 static int64_t get_pcr(const MpegTSWrite *ts, AVIOContext *pb)
720 return av_rescale(avio_tell(pb) + 11, 8 * PCR_TIME_BASE, ts->mux_rate) +
724 static void mpegts_prefix_m2ts_header(AVFormatContext *s)
726 MpegTSWrite *ts = s->priv_data;
728 int64_t pcr = get_pcr(s->priv_data, s->pb);
729 uint32_t tp_extra_header = pcr % 0x3fffffff;
730 tp_extra_header = AV_RB32(&tp_extra_header);
731 avio_write(s->pb, (unsigned char *) &tp_extra_header,
732 sizeof(tp_extra_header));
736 static void section_write_packet(MpegTSSection *s, const uint8_t *packet)
738 AVFormatContext *ctx = s->opaque;
739 mpegts_prefix_m2ts_header(ctx);
740 avio_write(ctx->pb, packet, TS_PACKET_SIZE);
743 static MpegTSService *mpegts_add_service(AVFormatContext *s, int sid,
744 const AVDictionary *metadata,
747 MpegTSWrite *ts = s->priv_data;
748 MpegTSService *service;
749 AVDictionaryEntry *title, *provider;
750 char default_service_name[32];
751 const char *service_name;
752 const char *provider_name;
754 title = av_dict_get(metadata, "service_name", NULL, 0);
756 title = av_dict_get(metadata, "title", NULL, 0);
757 snprintf(default_service_name, sizeof(default_service_name), "%s%02d", DEFAULT_SERVICE_NAME, ts->nb_services + 1);
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_period = av_rescale(ts->pcr_period, PCR_TIME_BASE, 1000);
796 /* For VBR we select the highest multiple of frame duration which is less than 100 ms. */
797 int64_t frame_period = 0;
798 if (pcr_st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
799 int frame_size = av_get_audio_frame_duration2(pcr_st->codecpar, 0);
801 av_log(s, AV_LOG_WARNING, "frame size not set\n");
804 frame_period = av_rescale_rnd(frame_size, PCR_TIME_BASE, pcr_st->codecpar->sample_rate, AV_ROUND_UP);
805 } else if (pcr_st->avg_frame_rate.num) {
806 frame_period = av_rescale_rnd(pcr_st->avg_frame_rate.den, PCR_TIME_BASE, pcr_st->avg_frame_rate.num, AV_ROUND_UP);
808 if (frame_period > 0 && frame_period <= PCR_TIME_BASE / 10)
809 ts_st->pcr_period = frame_period * (PCR_TIME_BASE / 10 / frame_period);
811 ts_st->pcr_period = 1;
814 // output a PCR as soon as possible
815 ts_st->last_pcr = ts->first_pcr - ts_st->pcr_period;
818 static void select_pcr_streams(AVFormatContext *s)
820 MpegTSWrite *ts = s->priv_data;
822 for (int i = 0; i < ts->nb_services; i++) {
823 MpegTSService *service = ts->services[i];
824 AVStream *pcr_st = NULL;
825 AVProgram *program = service->program;
826 int nb_streams = program ? program->nb_stream_indexes : s->nb_streams;
828 for (int j = 0; j < nb_streams; j++) {
829 AVStream *st = s->streams[program ? program->stream_index[j] : j];
831 pcr_st->codecpar->codec_type != AVMEDIA_TYPE_VIDEO && st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
838 MpegTSWriteStream *ts_st = pcr_st->priv_data;
839 service->pcr_pid = ts_st->pid;
840 enable_pcr_generation_for_stream(s, pcr_st);
841 av_log(s, AV_LOG_VERBOSE, "service %i using PCR in pid=%i, pcr_period=%"PRId64"ms\n",
842 service->sid, service->pcr_pid, av_rescale(ts_st->pcr_period, 1000, PCR_TIME_BASE));
847 static int mpegts_init(AVFormatContext *s)
849 MpegTSWrite *ts = s->priv_data;
854 if (s->max_delay < 0) /* Not set by the caller */
857 // round up to a whole number of TS packets
858 ts->pes_payload_size = (ts->pes_payload_size + 14 + 183) / 184 * 184 - 14;
860 ts->tsid = ts->transport_stream_id;
861 ts->onid = ts->original_network_id;
862 if (!s->nb_programs) {
863 /* allocate a single DVB service */
864 if (!mpegts_add_service(s, ts->service_id, s->metadata, NULL))
865 return AVERROR(ENOMEM);
867 for (i = 0; i < s->nb_programs; i++) {
868 AVProgram *program = s->programs[i];
869 if (!mpegts_add_service(s, program->id, program->metadata, program))
870 return AVERROR(ENOMEM);
874 ts->pat.pid = PAT_PID;
875 /* Initialize at 15 so that it wraps and is equal to 0 for the
876 * first packet we write. */
878 ts->pat.discontinuity= ts->flags & MPEGTS_FLAG_DISCONT;
879 ts->pat.write_packet = section_write_packet;
882 ts->sdt.pid = SDT_PID;
884 ts->sdt.discontinuity= ts->flags & MPEGTS_FLAG_DISCONT;
885 ts->sdt.write_packet = section_write_packet;
888 pids = av_malloc_array(s->nb_streams, sizeof(*pids));
890 ret = AVERROR(ENOMEM);
894 /* assign pids to each stream */
895 for (i = 0; i < s->nb_streams; i++) {
896 AVStream *st = s->streams[i];
897 MpegTSWriteStream *ts_st;
899 ts_st = av_mallocz(sizeof(MpegTSWriteStream));
901 ret = AVERROR(ENOMEM);
904 st->priv_data = ts_st;
906 avpriv_set_pts_info(st, 33, 1, 90000);
908 ts_st->payload = av_mallocz(ts->pes_payload_size);
909 if (!ts_st->payload) {
910 ret = AVERROR(ENOMEM);
914 /* MPEG pid values < 16 are reserved. Applications which set st->id in
915 * this range are assigned a calculated pid. */
917 ts_st->pid = ts->start_pid + i;
918 } else if (st->id < 0x1FFF) {
921 av_log(s, AV_LOG_ERROR,
922 "Invalid stream id %d, must be less than 8191\n", st->id);
923 ret = AVERROR(EINVAL);
926 for (j = 0; j < ts->nb_services; j++) {
927 if (ts_st->pid == ts->services[j]->pmt.pid) {
928 av_log(s, AV_LOG_ERROR, "Duplicate stream id %d\n", ts_st->pid);
929 ret = AVERROR(EINVAL);
933 for (j = 0; j < i; j++) {
934 if (pids[j] == ts_st->pid) {
935 av_log(s, AV_LOG_ERROR, "Duplicate stream id %d\n", ts_st->pid);
936 ret = AVERROR(EINVAL);
940 pids[i] = ts_st->pid;
941 ts_st->payload_pts = AV_NOPTS_VALUE;
942 ts_st->payload_dts = AV_NOPTS_VALUE;
943 ts_st->first_pts_check = 1;
945 ts_st->discontinuity = ts->flags & MPEGTS_FLAG_DISCONT;
946 if (st->codecpar->codec_id == AV_CODEC_ID_AAC &&
947 st->codecpar->extradata_size > 0) {
949 ts_st->amux = avformat_alloc_context();
951 ret = AVERROR(ENOMEM);
954 ts_st->amux->oformat =
955 av_guess_format((ts->flags & MPEGTS_FLAG_AAC_LATM) ? "latm" : "adts",
957 if (!ts_st->amux->oformat) {
958 ret = AVERROR(EINVAL);
961 if (!(ast = avformat_new_stream(ts_st->amux, NULL))) {
962 ret = AVERROR(ENOMEM);
965 ret = avcodec_parameters_copy(ast->codecpar, st->codecpar);
968 ast->time_base = st->time_base;
969 ret = avformat_write_header(ts_st->amux, NULL);
973 if (st->codecpar->codec_id == AV_CODEC_ID_OPUS) {
974 ts_st->opus_pending_trim_start = st->codecpar->initial_padding * 48000 / st->codecpar->sample_rate;
980 if (ts->mux_rate > 1) {
981 ts->sdt_packet_period = (int64_t)ts->mux_rate * SDT_RETRANS_TIME /
982 (TS_PACKET_SIZE * 8 * 1000);
983 ts->pat_packet_period = (int64_t)ts->mux_rate * PAT_RETRANS_TIME /
984 (TS_PACKET_SIZE * 8 * 1000);
986 /* Arbitrary values, PAT/PMT will also be written on video key frames */
987 ts->sdt_packet_period = 200;
988 ts->pat_packet_period = 40;
992 ts->first_pcr = av_rescale(s->max_delay, PCR_TIME_BASE, AV_TIME_BASE);
994 select_pcr_streams(s);
996 ts->last_pat_ts = AV_NOPTS_VALUE;
997 ts->last_sdt_ts = AV_NOPTS_VALUE;
998 // The user specified a period, use only it
999 if (ts->pat_period < INT_MAX/2) {
1000 ts->pat_packet_period = INT_MAX;
1002 if (ts->sdt_period < INT_MAX/2) {
1003 ts->sdt_packet_period = INT_MAX;
1006 ts->pat_packet_count = ts->pat_packet_period - 1;
1007 ts->sdt_packet_count = ts->sdt_packet_period - 1;
1009 if (ts->mux_rate == 1)
1010 av_log(s, AV_LOG_VERBOSE, "muxrate VBR, ");
1012 av_log(s, AV_LOG_VERBOSE, "muxrate %d, ", ts->mux_rate);
1013 av_log(s, AV_LOG_VERBOSE,
1014 "sdt every %d, pat/pmt every %d pkts\n",
1015 ts->sdt_packet_period, ts->pat_packet_period);
1017 if (ts->m2ts_mode == -1) {
1018 if (av_match_ext(s->url, "m2ts")) {
1032 /* send SDT, PAT and PMT tables regularly */
1033 static void retransmit_si_info(AVFormatContext *s, int force_pat, int64_t dts)
1035 MpegTSWrite *ts = s->priv_data;
1038 if (++ts->sdt_packet_count == ts->sdt_packet_period ||
1039 (dts != AV_NOPTS_VALUE && ts->last_sdt_ts == AV_NOPTS_VALUE) ||
1040 (dts != AV_NOPTS_VALUE && dts - ts->last_sdt_ts >= ts->sdt_period*90000.0)
1042 ts->sdt_packet_count = 0;
1043 if (dts != AV_NOPTS_VALUE)
1044 ts->last_sdt_ts = FFMAX(dts, ts->last_sdt_ts);
1045 mpegts_write_sdt(s);
1047 if (++ts->pat_packet_count == ts->pat_packet_period ||
1048 (dts != AV_NOPTS_VALUE && ts->last_pat_ts == AV_NOPTS_VALUE) ||
1049 (dts != AV_NOPTS_VALUE && dts - ts->last_pat_ts >= ts->pat_period*90000.0) ||
1051 ts->pat_packet_count = 0;
1052 if (dts != AV_NOPTS_VALUE)
1053 ts->last_pat_ts = FFMAX(dts, ts->last_pat_ts);
1054 mpegts_write_pat(s);
1055 for (i = 0; i < ts->nb_services; i++)
1056 mpegts_write_pmt(s, ts->services[i]);
1060 static int write_pcr_bits(uint8_t *buf, int64_t pcr)
1062 int64_t pcr_low = pcr % 300, pcr_high = pcr / 300;
1064 *buf++ = pcr_high >> 25;
1065 *buf++ = pcr_high >> 17;
1066 *buf++ = pcr_high >> 9;
1067 *buf++ = pcr_high >> 1;
1068 *buf++ = pcr_high << 7 | pcr_low >> 8 | 0x7e;
1074 /* Write a single null transport stream packet */
1075 static void mpegts_insert_null_packet(AVFormatContext *s)
1078 uint8_t buf[TS_PACKET_SIZE];
1085 memset(q, 0x0FF, TS_PACKET_SIZE - (q - buf));
1086 mpegts_prefix_m2ts_header(s);
1087 avio_write(s->pb, buf, TS_PACKET_SIZE);
1090 /* Write a single transport stream packet with a PCR and no payload */
1091 static void mpegts_insert_pcr_only(AVFormatContext *s, AVStream *st)
1093 MpegTSWrite *ts = s->priv_data;
1094 MpegTSWriteStream *ts_st = st->priv_data;
1096 uint8_t buf[TS_PACKET_SIZE];
1100 *q++ = ts_st->pid >> 8;
1102 *q++ = 0x20 | ts_st->cc; /* Adaptation only */
1103 /* Continuity Count field does not increment (see 13818-1 section 2.4.3.3) */
1104 *q++ = TS_PACKET_SIZE - 5; /* Adaptation Field Length */
1105 *q++ = 0x10; /* Adaptation flags: PCR present */
1106 if (ts_st->discontinuity) {
1108 ts_st->discontinuity = 0;
1111 /* PCR coded into 6 bytes */
1112 q += write_pcr_bits(q, get_pcr(ts, s->pb));
1114 /* stuffing bytes */
1115 memset(q, 0xFF, TS_PACKET_SIZE - (q - buf));
1116 mpegts_prefix_m2ts_header(s);
1117 avio_write(s->pb, buf, TS_PACKET_SIZE);
1120 static void write_pts(uint8_t *q, int fourbits, int64_t pts)
1124 val = fourbits << 4 | (((pts >> 30) & 0x07) << 1) | 1;
1126 val = (((pts >> 15) & 0x7fff) << 1) | 1;
1129 val = (((pts) & 0x7fff) << 1) | 1;
1134 /* Set an adaptation field flag in an MPEG-TS packet*/
1135 static void set_af_flag(uint8_t *pkt, int flag)
1137 // expect at least one flag to set
1140 if ((pkt[3] & 0x20) == 0) {
1141 // no AF yet, set adaptation field flag
1143 // 1 byte length, no flags
1150 /* Extend the adaptation field by size bytes */
1151 static void extend_af(uint8_t *pkt, int size)
1153 // expect already existing adaptation field
1154 av_assert0(pkt[3] & 0x20);
1158 /* Get a pointer to MPEG-TS payload (right after TS packet header) */
1159 static uint8_t *get_ts_payload_start(uint8_t *pkt)
1162 return pkt + 5 + pkt[4];
1167 /* Add a PES header to the front of the payload, and segment into an integer
1168 * number of TS packets. The final TS packet is padded using an oversized
1169 * adaptation header to exactly fill the last TS packet.
1170 * NOTE: 'payload' contains a complete PES payload. */
1171 static void mpegts_write_pes(AVFormatContext *s, AVStream *st,
1172 const uint8_t *payload, int payload_size,
1173 int64_t pts, int64_t dts, int key, int stream_id)
1175 MpegTSWriteStream *ts_st = st->priv_data;
1176 MpegTSWrite *ts = s->priv_data;
1177 uint8_t buf[TS_PACKET_SIZE];
1179 int val, is_start, len, header_len, write_pcr, is_dvb_subtitle, is_dvb_teletext, flags;
1180 int afc_len, stuffing_len;
1181 int64_t delay = av_rescale(s->max_delay, 90000, AV_TIME_BASE);
1182 int force_pat = st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO && key && !ts_st->prev_payload_key;
1184 av_assert0(ts_st->payload != buf || st->codecpar->codec_type != AVMEDIA_TYPE_VIDEO);
1185 if (ts->flags & MPEGTS_FLAG_PAT_PMT_AT_FRAMES && st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
1190 while (payload_size > 0) {
1191 int64_t pcr = -1; /* avoid warning */
1193 retransmit_si_info(s, force_pat, dts);
1197 if (ts->mux_rate > 1) {
1198 /* Send PCR packets for all PCR streams if needed */
1199 pcr = get_pcr(ts, s->pb);
1200 if (pcr >= ts->next_pcr) {
1201 int64_t next_pcr = INT64_MAX;
1202 for (int i = 0; i < s->nb_streams; i++) {
1203 /* Make the current stream the last, because for that we
1204 * can insert the pcr into the payload later */
1205 int st2_index = i < st->index ? i : (i + 1 == s->nb_streams ? st->index : i + 1);
1206 AVStream *st2 = s->streams[st2_index];
1207 MpegTSWriteStream *ts_st2 = st2->priv_data;
1208 if (ts_st2->pcr_period) {
1209 if (pcr - ts_st2->last_pcr >= ts_st2->pcr_period) {
1210 ts_st2->last_pcr = FFMAX(pcr - ts_st2->pcr_period, ts_st2->last_pcr + ts_st2->pcr_period);
1212 mpegts_insert_pcr_only(s, st2);
1213 pcr = get_pcr(ts, s->pb);
1218 next_pcr = FFMIN(next_pcr, ts_st2->last_pcr + ts_st2->pcr_period);
1221 ts->next_pcr = next_pcr;
1223 } else if (ts_st->pcr_period && dts != AV_NOPTS_VALUE) {
1224 pcr = (dts - delay) * 300;
1225 if (pcr - ts_st->last_pcr >= ts_st->pcr_period && is_start) {
1226 ts_st->last_pcr = FFMAX(pcr - ts_st->pcr_period, ts_st->last_pcr + ts_st->pcr_period);
1231 if (ts->mux_rate > 1 && dts != AV_NOPTS_VALUE &&
1232 (dts - get_pcr(ts, s->pb) / 300) > delay) {
1233 /* pcr insert gets priority over null packet insert */
1235 mpegts_insert_pcr_only(s, st);
1237 mpegts_insert_null_packet(s);
1238 /* recalculate write_pcr and possibly retransmit si_info */
1242 /* prepare packet header */
1245 val = ts_st->pid >> 8;
1250 ts_st->cc = ts_st->cc + 1 & 0xf;
1251 *q++ = 0x10 | ts_st->cc; // payload indicator + CC
1252 if (ts_st->discontinuity) {
1253 set_af_flag(buf, 0x80);
1254 q = get_ts_payload_start(buf);
1255 ts_st->discontinuity = 0;
1257 if (key && is_start && pts != AV_NOPTS_VALUE) {
1258 // set Random Access for key frames
1259 if (ts_st->pcr_period)
1261 set_af_flag(buf, 0x40);
1262 q = get_ts_payload_start(buf);
1265 set_af_flag(buf, 0x10);
1266 q = get_ts_payload_start(buf);
1267 // add 11, pcr references the last byte of program clock reference base
1268 if (dts != AV_NOPTS_VALUE && dts < pcr / 300)
1269 av_log(s, AV_LOG_WARNING, "dts < pcr, TS is invalid\n");
1270 extend_af(buf, write_pcr_bits(q, pcr));
1271 q = get_ts_payload_start(buf);
1274 int pes_extension = 0;
1275 int pes_header_stuffing_bytes = 0;
1276 /* write PES header */
1280 is_dvb_subtitle = 0;
1281 is_dvb_teletext = 0;
1282 if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
1283 if (st->codecpar->codec_id == AV_CODEC_ID_DIRAC)
1287 } else if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO &&
1288 (st->codecpar->codec_id == AV_CODEC_ID_MP2 ||
1289 st->codecpar->codec_id == AV_CODEC_ID_MP3 ||
1290 st->codecpar->codec_id == AV_CODEC_ID_AAC)) {
1292 } else if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO &&
1293 st->codecpar->codec_id == AV_CODEC_ID_AC3 &&
1296 } else if (st->codecpar->codec_type == AVMEDIA_TYPE_DATA &&
1297 st->codecpar->codec_id == AV_CODEC_ID_TIMED_ID3) {
1299 } else if (st->codecpar->codec_type == AVMEDIA_TYPE_DATA) {
1300 *q++ = stream_id != -1 ? stream_id : 0xfc;
1302 if (stream_id == 0xbd) /* asynchronous KLV */
1303 pts = dts = AV_NOPTS_VALUE;
1306 if (st->codecpar->codec_type == AVMEDIA_TYPE_SUBTITLE) {
1307 if (st->codecpar->codec_id == AV_CODEC_ID_DVB_SUBTITLE) {
1308 is_dvb_subtitle = 1;
1309 } else if (st->codecpar->codec_id == AV_CODEC_ID_DVB_TELETEXT) {
1310 is_dvb_teletext = 1;
1316 if (pts != AV_NOPTS_VALUE) {
1320 if (dts != AV_NOPTS_VALUE && pts != AV_NOPTS_VALUE && dts != pts) {
1324 if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO &&
1325 st->codecpar->codec_id == AV_CODEC_ID_DIRAC) {
1326 /* set PES_extension_flag */
1330 /* One byte for PES2 extension flag +
1331 * one byte for extension length +
1332 * one byte for extension id */
1335 /* for Blu-ray AC3 Audio the PES Extension flag should be as follow
1336 * otherwise it will not play sound on blu-ray
1338 if (ts->m2ts_mode &&
1339 st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO &&
1340 st->codecpar->codec_id == AV_CODEC_ID_AC3) {
1341 /* set PES_extension_flag */
1346 if (is_dvb_teletext) {
1347 pes_header_stuffing_bytes = 0x24 - header_len;
1350 len = payload_size + header_len + 3;
1351 /* 3 extra bytes should be added to DVB subtitle payload: 0x20 0x00 at the beginning and trailing 0xff */
1352 if (is_dvb_subtitle) {
1358 if (ts->omit_video_pes_length && st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
1364 /* data alignment indicator is required for subtitle and data streams */
1365 if (st->codecpar->codec_type == AVMEDIA_TYPE_SUBTITLE || st->codecpar->codec_type == AVMEDIA_TYPE_DATA)
1370 if (pts != AV_NOPTS_VALUE) {
1371 write_pts(q, flags >> 6, pts);
1374 if (dts != AV_NOPTS_VALUE && pts != AV_NOPTS_VALUE && dts != pts) {
1375 write_pts(q, 1, dts);
1378 if (pes_extension && st->codecpar->codec_id == AV_CODEC_ID_DIRAC) {
1379 flags = 0x01; /* set PES_extension_flag_2 */
1381 *q++ = 0x80 | 0x01; /* marker bit + extension length */
1382 /* Set the stream ID extension flag bit to 0 and
1383 * write the extended stream ID. */
1386 /* For Blu-ray AC3 Audio Setting extended flags */
1387 if (ts->m2ts_mode &&
1389 st->codecpar->codec_id == AV_CODEC_ID_AC3) {
1390 flags = 0x01; /* set PES_extension_flag_2 */
1392 *q++ = 0x80 | 0x01; /* marker bit + extension length */
1393 *q++ = 0x00 | 0x71; /* for AC3 Audio (specifically on blue-rays) */
1397 if (is_dvb_subtitle) {
1398 /* First two fields of DVB subtitles PES data:
1399 * data_identifier: for DVB subtitle streams shall be coded with the value 0x20
1400 * subtitle_stream_id: for DVB subtitle stream shall be identified by the value 0x00 */
1404 if (is_dvb_teletext) {
1405 memset(q, 0xff, pes_header_stuffing_bytes);
1406 q += pes_header_stuffing_bytes;
1411 header_len = q - buf;
1413 len = TS_PACKET_SIZE - header_len;
1414 if (len > payload_size)
1416 stuffing_len = TS_PACKET_SIZE - header_len - len;
1417 if (stuffing_len > 0) {
1418 /* add stuffing with AFC */
1419 if (buf[3] & 0x20) {
1420 /* stuffing already present: increase its size */
1421 afc_len = buf[4] + 1;
1422 memmove(buf + 4 + afc_len + stuffing_len,
1424 header_len - (4 + afc_len));
1425 buf[4] += stuffing_len;
1426 memset(buf + 4 + afc_len, 0xff, stuffing_len);
1429 memmove(buf + 4 + stuffing_len, buf + 4, header_len - 4);
1431 buf[4] = stuffing_len - 1;
1432 if (stuffing_len >= 2) {
1434 memset(buf + 6, 0xff, stuffing_len - 2);
1439 if (is_dvb_subtitle && payload_size == len) {
1440 memcpy(buf + TS_PACKET_SIZE - len, payload, len - 1);
1441 buf[TS_PACKET_SIZE - 1] = 0xff; /* end_of_PES_data_field_marker: an 8-bit field with fixed contents 0xff for DVB subtitle */
1443 memcpy(buf + TS_PACKET_SIZE - len, payload, len);
1447 payload_size -= len;
1448 mpegts_prefix_m2ts_header(s);
1449 avio_write(s->pb, buf, TS_PACKET_SIZE);
1451 ts_st->prev_payload_key = key;
1454 int ff_check_h264_startcode(AVFormatContext *s, const AVStream *st, const AVPacket *pkt)
1456 if (pkt->size < 5 || AV_RB32(pkt->data) != 0x0000001 && AV_RB24(pkt->data) != 0x000001) {
1457 if (!st->nb_frames) {
1458 av_log(s, AV_LOG_ERROR, "H.264 bitstream malformed, "
1459 "no startcode found, use the video bitstream filter 'h264_mp4toannexb' to fix it "
1460 "('-bsf:v h264_mp4toannexb' option with ffmpeg)\n");
1461 return AVERROR_INVALIDDATA;
1463 av_log(s, AV_LOG_WARNING, "H.264 bitstream error, startcode missing, size %d", pkt->size);
1465 av_log(s, AV_LOG_WARNING, " data %08"PRIX32, AV_RB32(pkt->data));
1466 av_log(s, AV_LOG_WARNING, "\n");
1471 static int check_hevc_startcode(AVFormatContext *s, const AVStream *st, const AVPacket *pkt)
1473 if (pkt->size < 5 || AV_RB32(pkt->data) != 0x0000001 && AV_RB24(pkt->data) != 0x000001) {
1474 if (!st->nb_frames) {
1475 av_log(s, AV_LOG_ERROR, "HEVC bitstream malformed, no startcode found\n");
1476 return AVERROR_PATCHWELCOME;
1478 av_log(s, AV_LOG_WARNING, "HEVC bitstream error, startcode missing, size %d", pkt->size);
1480 av_log(s, AV_LOG_WARNING, " data %08"PRIX32, AV_RB32(pkt->data));
1481 av_log(s, AV_LOG_WARNING, "\n");
1486 /* Based on GStreamer's gst-plugins-base/ext/ogg/gstoggstream.c
1487 * Released under the LGPL v2.1+, written by
1488 * Vincent Penquerc'h <vincent.penquerch@collabora.co.uk>
1490 static int opus_get_packet_samples(AVFormatContext *s, AVPacket *pkt)
1492 static const int durations[32] = {
1493 480, 960, 1920, 2880, /* Silk NB */
1494 480, 960, 1920, 2880, /* Silk MB */
1495 480, 960, 1920, 2880, /* Silk WB */
1496 480, 960, /* Hybrid SWB */
1497 480, 960, /* Hybrid FB */
1498 120, 240, 480, 960, /* CELT NB */
1499 120, 240, 480, 960, /* CELT NB */
1500 120, 240, 480, 960, /* CELT NB */
1501 120, 240, 480, 960, /* CELT NB */
1503 int toc, frame_duration, nframes, duration;
1510 frame_duration = durations[toc >> 3];
1524 nframes = pkt->data[1] & 63;
1528 duration = nframes * frame_duration;
1529 if (duration > 5760) {
1530 av_log(s, AV_LOG_WARNING,
1531 "Opus packet duration > 120 ms, invalid");
1538 static int mpegts_write_packet_internal(AVFormatContext *s, AVPacket *pkt)
1540 AVStream *st = s->streams[pkt->stream_index];
1541 int size = pkt->size;
1542 uint8_t *buf = pkt->data;
1543 uint8_t *data = NULL;
1544 MpegTSWrite *ts = s->priv_data;
1545 MpegTSWriteStream *ts_st = st->priv_data;
1546 const int64_t delay = av_rescale(s->max_delay, 90000, AV_TIME_BASE) * 2;
1547 int64_t dts = pkt->dts, pts = pkt->pts;
1548 int opus_samples = 0;
1550 uint8_t *side_data = NULL;
1553 side_data = av_packet_get_side_data(pkt,
1554 AV_PKT_DATA_MPEGTS_STREAM_ID,
1557 stream_id = side_data[0];
1559 if (ts->flags & MPEGTS_FLAG_REEMIT_PAT_PMT) {
1560 ts->pat_packet_count = ts->pat_packet_period - 1;
1561 ts->sdt_packet_count = ts->sdt_packet_period - 1;
1562 ts->flags &= ~MPEGTS_FLAG_REEMIT_PAT_PMT;
1565 if (ts->copyts < 1) {
1566 if (pts != AV_NOPTS_VALUE)
1568 if (dts != AV_NOPTS_VALUE)
1572 if (ts_st->first_pts_check && pts == AV_NOPTS_VALUE) {
1573 av_log(s, AV_LOG_ERROR, "first pts value must be set\n");
1574 return AVERROR_INVALIDDATA;
1576 ts_st->first_pts_check = 0;
1578 if (st->codecpar->codec_id == AV_CODEC_ID_H264) {
1579 const uint8_t *p = buf, *buf_end = p + size;
1580 uint32_t state = -1;
1581 int extradd = (pkt->flags & AV_PKT_FLAG_KEY) ? st->codecpar->extradata_size : 0;
1582 int ret = ff_check_h264_startcode(s, st, pkt);
1586 if (extradd && AV_RB24(st->codecpar->extradata) > 1)
1590 p = avpriv_find_start_code(p, buf_end, &state);
1591 av_log(s, AV_LOG_TRACE, "nal %"PRId32"\n", state & 0x1f);
1592 if ((state & 0x1f) == 7)
1594 } while (p < buf_end && (state & 0x1f) != 9 &&
1595 (state & 0x1f) != 5 && (state & 0x1f) != 1);
1597 if ((state & 0x1f) != 5)
1599 if ((state & 0x1f) != 9) { // AUD NAL
1600 data = av_malloc(pkt->size + 6 + extradd);
1602 return AVERROR(ENOMEM);
1603 memcpy(data + 6, st->codecpar->extradata, extradd);
1604 memcpy(data + 6 + extradd, pkt->data, pkt->size);
1605 AV_WB32(data, 0x00000001);
1607 data[5] = 0xf0; // any slice type (0xe) + rbsp stop one bit
1609 size = pkt->size + 6 + extradd;
1611 } else if (st->codecpar->codec_id == AV_CODEC_ID_AAC) {
1612 if (pkt->size < 2) {
1613 av_log(s, AV_LOG_ERROR, "AAC packet too short\n");
1614 return AVERROR_INVALIDDATA;
1616 if ((AV_RB16(pkt->data) & 0xfff0) != 0xfff0) {
1621 av_log(s, AV_LOG_ERROR, "AAC bitstream not in ADTS format "
1622 "and extradata missing\n");
1624 av_init_packet(&pkt2);
1625 pkt2.data = pkt->data;
1626 pkt2.size = pkt->size;
1627 av_assert0(pkt->dts != AV_NOPTS_VALUE);
1628 pkt2.dts = av_rescale_q(pkt->dts, st->time_base, ts_st->amux->streams[0]->time_base);
1630 ret = avio_open_dyn_buf(&ts_st->amux->pb);
1632 return AVERROR(ENOMEM);
1634 ret = av_write_frame(ts_st->amux, &pkt2);
1636 ffio_free_dyn_buf(&ts_st->amux->pb);
1639 size = avio_close_dyn_buf(ts_st->amux->pb, &data);
1640 ts_st->amux->pb = NULL;
1644 } else if (st->codecpar->codec_id == AV_CODEC_ID_HEVC) {
1645 const uint8_t *p = buf, *buf_end = p + size;
1646 uint32_t state = -1;
1647 int extradd = (pkt->flags & AV_PKT_FLAG_KEY) ? st->codecpar->extradata_size : 0;
1648 int ret = check_hevc_startcode(s, st, pkt);
1652 if (extradd && AV_RB24(st->codecpar->extradata) > 1)
1656 p = avpriv_find_start_code(p, buf_end, &state);
1657 av_log(s, AV_LOG_TRACE, "nal %"PRId32"\n", (state & 0x7e)>>1);
1658 if ((state & 0x7e) == 2*32)
1660 } while (p < buf_end && (state & 0x7e) != 2*35 &&
1661 (state & 0x7e) >= 2*32);
1663 if ((state & 0x7e) < 2*16 && (state & 0x7e) >= 2*24)
1665 if ((state & 0x7e) != 2*35) { // AUD NAL
1666 data = av_malloc(pkt->size + 7 + extradd);
1668 return AVERROR(ENOMEM);
1669 memcpy(data + 7, st->codecpar->extradata, extradd);
1670 memcpy(data + 7 + extradd, pkt->data, pkt->size);
1671 AV_WB32(data, 0x00000001);
1674 data[6] = 0x50; // any slice type (0x4) + rbsp stop one bit
1676 size = pkt->size + 7 + extradd;
1678 } else if (st->codecpar->codec_id == AV_CODEC_ID_OPUS) {
1679 if (pkt->size < 2) {
1680 av_log(s, AV_LOG_ERROR, "Opus packet too short\n");
1681 return AVERROR_INVALIDDATA;
1684 /* Add Opus control header */
1685 if ((AV_RB16(pkt->data) >> 5) != 0x3ff) {
1689 int ctrl_header_size;
1690 int trim_start = 0, trim_end = 0;
1692 opus_samples = opus_get_packet_samples(s, pkt);
1694 side_data = av_packet_get_side_data(pkt,
1695 AV_PKT_DATA_SKIP_SAMPLES,
1698 if (side_data && side_data_size >= 10) {
1699 trim_end = AV_RL32(side_data + 4) * 48000 / st->codecpar->sample_rate;
1702 ctrl_header_size = pkt->size + 2 + pkt->size / 255 + 1;
1703 if (ts_st->opus_pending_trim_start)
1704 ctrl_header_size += 2;
1706 ctrl_header_size += 2;
1708 data = av_malloc(ctrl_header_size);
1710 return AVERROR(ENOMEM);
1714 if (ts_st->opus_pending_trim_start)
1722 data[i] = FFMIN(n, 255);
1727 av_assert0(2 + pkt->size / 255 + 1 == i);
1729 if (ts_st->opus_pending_trim_start) {
1730 trim_start = FFMIN(ts_st->opus_pending_trim_start, opus_samples);
1731 AV_WB16(data + i, trim_start);
1733 ts_st->opus_pending_trim_start -= trim_start;
1736 trim_end = FFMIN(trim_end, opus_samples - trim_start);
1737 AV_WB16(data + i, trim_end);
1741 memcpy(data + i, pkt->data, pkt->size);
1743 size = ctrl_header_size;
1745 /* TODO: Can we get TS formatted data here? If so we will
1746 * need to count the samples of that too! */
1747 av_log(s, AV_LOG_WARNING, "Got MPEG-TS formatted Opus data, unhandled");
1751 if (pkt->dts != AV_NOPTS_VALUE) {
1753 for(i=0; i<s->nb_streams; i++) {
1754 AVStream *st2 = s->streams[i];
1755 MpegTSWriteStream *ts_st2 = st2->priv_data;
1756 if ( ts_st2->payload_size
1757 && (ts_st2->payload_dts == AV_NOPTS_VALUE || dts - ts_st2->payload_dts > delay/2)) {
1758 mpegts_write_pes(s, st2, ts_st2->payload, ts_st2->payload_size,
1759 ts_st2->payload_pts, ts_st2->payload_dts,
1760 ts_st2->payload_flags & AV_PKT_FLAG_KEY, stream_id);
1761 ts_st2->payload_size = 0;
1766 if (ts_st->payload_size && (ts_st->payload_size + size > ts->pes_payload_size ||
1767 (dts != AV_NOPTS_VALUE && ts_st->payload_dts != AV_NOPTS_VALUE &&
1768 av_compare_ts(dts - ts_st->payload_dts, st->time_base,
1769 s->max_delay, AV_TIME_BASE_Q) >= 0) ||
1770 ts_st->opus_queued_samples + opus_samples >= 5760 /* 120ms */)) {
1771 mpegts_write_pes(s, st, ts_st->payload, ts_st->payload_size,
1772 ts_st->payload_pts, ts_st->payload_dts,
1773 ts_st->payload_flags & AV_PKT_FLAG_KEY, stream_id);
1774 ts_st->payload_size = 0;
1775 ts_st->opus_queued_samples = 0;
1778 if (st->codecpar->codec_type != AVMEDIA_TYPE_AUDIO || size > ts->pes_payload_size) {
1779 av_assert0(!ts_st->payload_size);
1780 // for video and subtitle, write a single pes packet
1781 mpegts_write_pes(s, st, buf, size, pts, dts,
1782 pkt->flags & AV_PKT_FLAG_KEY, stream_id);
1783 ts_st->opus_queued_samples = 0;
1788 if (!ts_st->payload_size) {
1789 ts_st->payload_pts = pts;
1790 ts_st->payload_dts = dts;
1791 ts_st->payload_flags = pkt->flags;
1794 memcpy(ts_st->payload + ts_st->payload_size, buf, size);
1795 ts_st->payload_size += size;
1796 ts_st->opus_queued_samples += opus_samples;
1803 static void mpegts_write_flush(AVFormatContext *s)
1807 /* flush current packets */
1808 for (i = 0; i < s->nb_streams; i++) {
1809 AVStream *st = s->streams[i];
1810 MpegTSWriteStream *ts_st = st->priv_data;
1811 if (ts_st->payload_size > 0) {
1812 mpegts_write_pes(s, st, ts_st->payload, ts_st->payload_size,
1813 ts_st->payload_pts, ts_st->payload_dts,
1814 ts_st->payload_flags & AV_PKT_FLAG_KEY, -1);
1815 ts_st->payload_size = 0;
1816 ts_st->opus_queued_samples = 0;
1821 static int mpegts_write_packet(AVFormatContext *s, AVPacket *pkt)
1824 mpegts_write_flush(s);
1827 return mpegts_write_packet_internal(s, pkt);
1831 static int mpegts_write_end(AVFormatContext *s)
1834 mpegts_write_flush(s);
1839 static void mpegts_deinit(AVFormatContext *s)
1841 MpegTSWrite *ts = s->priv_data;
1842 MpegTSService *service;
1845 for (i = 0; i < s->nb_streams; i++) {
1846 AVStream *st = s->streams[i];
1847 MpegTSWriteStream *ts_st = st->priv_data;
1849 av_freep(&ts_st->payload);
1851 avformat_free_context(ts_st->amux);
1857 for (i = 0; i < ts->nb_services; i++) {
1858 service = ts->services[i];
1861 av_freep(&ts->services);
1864 static int mpegts_check_bitstream(struct AVFormatContext *s, const AVPacket *pkt)
1867 AVStream *st = s->streams[pkt->stream_index];
1869 if (st->codecpar->codec_id == AV_CODEC_ID_H264) {
1870 if (pkt->size >= 5 && AV_RB32(pkt->data) != 0x0000001 &&
1871 (AV_RB24(pkt->data) != 0x000001 ||
1872 (st->codecpar->extradata_size > 0 &&
1873 st->codecpar->extradata[0] == 1)))
1874 ret = ff_stream_add_bitstream_filter(st, "h264_mp4toannexb", NULL);
1875 } else if (st->codecpar->codec_id == AV_CODEC_ID_HEVC) {
1876 if (pkt->size >= 5 && AV_RB32(pkt->data) != 0x0000001 &&
1877 (AV_RB24(pkt->data) != 0x000001 ||
1878 (st->codecpar->extradata_size > 0 &&
1879 st->codecpar->extradata[0] == 1)))
1880 ret = ff_stream_add_bitstream_filter(st, "hevc_mp4toannexb", NULL);
1886 static const AVOption options[] = {
1887 { "mpegts_transport_stream_id", "Set transport_stream_id field.",
1888 offsetof(MpegTSWrite, transport_stream_id), AV_OPT_TYPE_INT,
1889 { .i64 = 0x0001 }, 0x0001, 0xffff, AV_OPT_FLAG_ENCODING_PARAM },
1890 { "mpegts_original_network_id", "Set original_network_id field.",
1891 offsetof(MpegTSWrite, original_network_id), AV_OPT_TYPE_INT,
1892 { .i64 = DVB_PRIVATE_NETWORK_START }, 0x0001, 0xffff, AV_OPT_FLAG_ENCODING_PARAM },
1893 { "mpegts_service_id", "Set service_id field.",
1894 offsetof(MpegTSWrite, service_id), AV_OPT_TYPE_INT,
1895 { .i64 = 0x0001 }, 0x0001, 0xffff, AV_OPT_FLAG_ENCODING_PARAM },
1896 { "mpegts_service_type", "Set service_type field.",
1897 offsetof(MpegTSWrite, service_type), AV_OPT_TYPE_INT,
1898 { .i64 = 0x01 }, 0x01, 0xff, AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
1899 { "digital_tv", "Digital Television.",
1900 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_DIGITAL_TV }, 0x01, 0xff,
1901 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
1902 { "digital_radio", "Digital Radio.",
1903 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_DIGITAL_RADIO }, 0x01, 0xff,
1904 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
1905 { "teletext", "Teletext.",
1906 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_TELETEXT }, 0x01, 0xff,
1907 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
1908 { "advanced_codec_digital_radio", "Advanced Codec Digital Radio.",
1909 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_ADVANCED_CODEC_DIGITAL_RADIO }, 0x01, 0xff,
1910 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
1911 { "mpeg2_digital_hdtv", "MPEG2 Digital HDTV.",
1912 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_MPEG2_DIGITAL_HDTV }, 0x01, 0xff,
1913 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
1914 { "advanced_codec_digital_sdtv", "Advanced Codec Digital SDTV.",
1915 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_ADVANCED_CODEC_DIGITAL_SDTV }, 0x01, 0xff,
1916 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
1917 { "advanced_codec_digital_hdtv", "Advanced Codec Digital HDTV.",
1918 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_ADVANCED_CODEC_DIGITAL_HDTV }, 0x01, 0xff,
1919 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
1920 { "hevc_digital_hdtv", "HEVC Digital Television Service.",
1921 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_HEVC_DIGITAL_HDTV }, 0x01, 0xff,
1922 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
1923 { "mpegts_pmt_start_pid", "Set the first pid of the PMT.",
1924 offsetof(MpegTSWrite, pmt_start_pid), AV_OPT_TYPE_INT,
1925 { .i64 = 0x1000 }, 0x0010, 0x1f00, AV_OPT_FLAG_ENCODING_PARAM },
1926 { "mpegts_start_pid", "Set the first pid.",
1927 offsetof(MpegTSWrite, start_pid), AV_OPT_TYPE_INT,
1928 { .i64 = 0x0100 }, 0x0010, 0x0f00, AV_OPT_FLAG_ENCODING_PARAM },
1929 { "mpegts_m2ts_mode", "Enable m2ts mode.",
1930 offsetof(MpegTSWrite, m2ts_mode), AV_OPT_TYPE_BOOL,
1931 { .i64 = -1 }, -1, 1, AV_OPT_FLAG_ENCODING_PARAM },
1933 offsetof(MpegTSWrite, mux_rate), AV_OPT_TYPE_INT,
1934 { .i64 = 1 }, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
1935 { "pes_payload_size", "Minimum PES packet payload in bytes",
1936 offsetof(MpegTSWrite, pes_payload_size), AV_OPT_TYPE_INT,
1937 { .i64 = DEFAULT_PES_PAYLOAD_SIZE }, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
1938 { "mpegts_flags", "MPEG-TS muxing flags",
1939 offsetof(MpegTSWrite, flags), AV_OPT_TYPE_FLAGS, { .i64 = 0 }, 0, INT_MAX,
1940 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_flags" },
1941 { "resend_headers", "Reemit PAT/PMT before writing the next packet",
1942 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_FLAG_REEMIT_PAT_PMT }, 0, INT_MAX,
1943 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_flags" },
1944 { "latm", "Use LATM packetization for AAC",
1945 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_FLAG_AAC_LATM }, 0, INT_MAX,
1946 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_flags" },
1947 { "pat_pmt_at_frames", "Reemit PAT and PMT at each video frame",
1948 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_FLAG_PAT_PMT_AT_FRAMES}, 0, INT_MAX,
1949 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_flags" },
1950 { "system_b", "Conform to System B (DVB) instead of System A (ATSC)",
1951 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_FLAG_SYSTEM_B }, 0, INT_MAX,
1952 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_flags" },
1953 { "initial_discontinuity", "Mark initial packets as discontinuous",
1954 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_FLAG_DISCONT }, 0, INT_MAX,
1955 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_flags" },
1956 { "mpegts_copyts", "don't offset dts/pts",
1957 offsetof(MpegTSWrite, copyts), AV_OPT_TYPE_BOOL,
1958 { .i64 = -1 }, -1, 1, AV_OPT_FLAG_ENCODING_PARAM },
1959 { "tables_version", "set PAT, PMT and SDT version",
1960 offsetof(MpegTSWrite, tables_version), AV_OPT_TYPE_INT,
1961 { .i64 = 0 }, 0, 31, AV_OPT_FLAG_ENCODING_PARAM },
1962 { "omit_video_pes_length", "Omit the PES packet length for video packets",
1963 offsetof(MpegTSWrite, omit_video_pes_length), AV_OPT_TYPE_BOOL,
1964 { .i64 = 1 }, 0, 1, AV_OPT_FLAG_ENCODING_PARAM },
1965 { "pcr_period", "PCR retransmission time in milliseconds",
1966 offsetof(MpegTSWrite, pcr_period), AV_OPT_TYPE_INT,
1967 { .i64 = PCR_RETRANS_TIME }, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
1968 { "pat_period", "PAT/PMT retransmission time limit in seconds",
1969 offsetof(MpegTSWrite, pat_period), AV_OPT_TYPE_DOUBLE,
1970 { .dbl = INT_MAX }, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
1971 { "sdt_period", "SDT retransmission time limit in seconds",
1972 offsetof(MpegTSWrite, sdt_period), AV_OPT_TYPE_DOUBLE,
1973 { .dbl = INT_MAX }, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
1977 static const AVClass mpegts_muxer_class = {
1978 .class_name = "MPEGTS muxer",
1979 .item_name = av_default_item_name,
1981 .version = LIBAVUTIL_VERSION_INT,
1984 AVOutputFormat ff_mpegts_muxer = {
1986 .long_name = NULL_IF_CONFIG_SMALL("MPEG-TS (MPEG-2 Transport Stream)"),
1987 .mime_type = "video/MP2T",
1988 .extensions = "ts,m2t,m2ts,mts",
1989 .priv_data_size = sizeof(MpegTSWrite),
1990 .audio_codec = AV_CODEC_ID_MP2,
1991 .video_codec = AV_CODEC_ID_MPEG2VIDEO,
1992 .init = mpegts_init,
1993 .write_packet = mpegts_write_packet,
1994 .write_trailer = mpegts_write_end,
1995 .deinit = mpegts_deinit,
1996 .check_bitstream = mpegts_check_bitstream,
1997 .flags = AVFMT_ALLOW_FLUSH | AVFMT_VARIABLE_FPS | AVFMT_NODIMENSIONS,
1998 .priv_class = &mpegts_muxer_class,