2 * MPEG2 transport stream (aka DVB) muxer
3 * Copyright (c) 2003 Fabrice Bellard
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 #include "libavutil/avassert.h"
23 #include "libavutil/bswap.h"
24 #include "libavutil/crc.h"
25 #include "libavutil/dict.h"
26 #include "libavutil/intreadwrite.h"
27 #include "libavutil/mathematics.h"
28 #include "libavutil/opt.h"
30 #include "libavcodec/internal.h"
33 #include "avio_internal.h"
37 #define PCR_TIME_BASE 27000000
39 /* write DVB SI sections */
41 /*********************************************/
42 /* mpegts section writer */
44 typedef struct MpegTSSection {
47 void (*write_packet)(struct MpegTSSection *s, const uint8_t *packet);
51 typedef struct MpegTSService {
52 MpegTSSection pmt; /* MPEG2 pmt table context */
53 int sid; /* service ID */
58 int pcr_packet_period;
61 // service_type values as defined in ETSI 300 468
63 MPEGTS_SERVICE_TYPE_DIGITAL_TV = 0x01,
64 MPEGTS_SERVICE_TYPE_DIGITAL_RADIO = 0x02,
65 MPEGTS_SERVICE_TYPE_TELETEXT = 0x03,
66 MPEGTS_SERVICE_TYPE_ADVANCED_CODEC_DIGITAL_RADIO = 0x0A,
67 MPEGTS_SERVICE_TYPE_MPEG2_DIGITAL_HDTV = 0x11,
68 MPEGTS_SERVICE_TYPE_ADVANCED_CODEC_DIGITAL_SDTV = 0x16,
69 MPEGTS_SERVICE_TYPE_ADVANCED_CODEC_DIGITAL_HDTV = 0x19
71 typedef struct MpegTSWrite {
72 const AVClass *av_class;
73 MpegTSSection pat; /* MPEG2 pat table */
74 MpegTSSection sdt; /* MPEG2 sdt table context */
75 MpegTSService **services;
77 int sdt_packet_period;
79 int pat_packet_period;
84 int mux_rate; ///< set to 1 when VBR
87 int transport_stream_id;
88 int original_network_id;
96 int reemit_pat_pmt; // backward compatibility
99 #define MPEGTS_FLAG_REEMIT_PAT_PMT 0x01
100 #define MPEGTS_FLAG_AAC_LATM 0x02
101 #define MPEGTS_FLAG_PAT_PMT_AT_FRAMES 0x04
110 int omit_video_pes_length;
113 /* a PES packet header is generated every DEFAULT_PES_HEADER_FREQ packets */
114 #define DEFAULT_PES_HEADER_FREQ 16
115 #define DEFAULT_PES_PAYLOAD_SIZE ((DEFAULT_PES_HEADER_FREQ - 1) * 184 + 170)
117 /* The section length is 12 bits. The first 2 are set to 0, the remaining
118 * 10 bits should not exceed 1021. */
119 #define SECTION_LENGTH 1020
121 /* NOTE: 4 bytes must be left at the end for the crc32 */
122 static void mpegts_write_section(MpegTSSection *s, uint8_t *buf, int len)
125 unsigned char packet[TS_PACKET_SIZE];
126 const unsigned char *buf_ptr;
128 int first, b, len1, left;
130 crc = av_bswap32(av_crc(av_crc_get_table(AV_CRC_32_IEEE),
133 buf[len - 4] = (crc >> 24) & 0xff;
134 buf[len - 3] = (crc >> 16) & 0xff;
135 buf[len - 2] = (crc >> 8) & 0xff;
136 buf[len - 1] = crc & 0xff;
138 /* send each packet */
141 first = buf == buf_ptr;
149 s->cc = s->cc + 1 & 0xf;
152 *q++ = 0; /* 0 offset */
153 len1 = TS_PACKET_SIZE - (q - packet);
156 memcpy(q, buf_ptr, len1);
158 /* add known padding data */
159 left = TS_PACKET_SIZE - (q - packet);
161 memset(q, 0xff, left);
163 s->write_packet(s, packet);
170 static inline void put16(uint8_t **q_ptr, int val)
179 static int mpegts_write_section1(MpegTSSection *s, int tid, int id,
180 int version, int sec_num, int last_sec_num,
181 uint8_t *buf, int len)
183 uint8_t section[1024], *q;
184 unsigned int tot_len;
185 /* reserved_future_use field must be set to 1 for SDT */
186 unsigned int flags = tid == SDT_TID ? 0xf000 : 0xb000;
188 tot_len = 3 + 5 + len + 4;
189 /* check if not too big */
191 return AVERROR_INVALIDDATA;
195 put16(&q, flags | (len + 5 + 4)); /* 5 byte header + 4 byte CRC */
197 *q++ = 0xc1 | (version << 1); /* current_next_indicator = 1 */
202 mpegts_write_section(s, section, tot_len);
206 /*********************************************/
209 #define DEFAULT_PROVIDER_NAME "FFmpeg"
210 #define DEFAULT_SERVICE_NAME "Service01"
212 /* we retransmit the SI info at this rate */
213 #define SDT_RETRANS_TIME 500
214 #define PAT_RETRANS_TIME 100
215 #define PCR_RETRANS_TIME 20
217 typedef struct MpegTSWriteStream {
218 struct MpegTSService *service;
219 int pid; /* stream associated pid */
222 int first_pts_check; ///< first pts check needed
223 int prev_payload_key;
228 AVFormatContext *amux;
232 int opus_queued_samples;
233 int opus_pending_trim_start;
236 static void mpegts_write_pat(AVFormatContext *s)
238 MpegTSWrite *ts = s->priv_data;
239 MpegTSService *service;
240 uint8_t data[SECTION_LENGTH], *q;
244 for (i = 0; i < ts->nb_services; i++) {
245 service = ts->services[i];
246 put16(&q, service->sid);
247 put16(&q, 0xe000 | service->pmt.pid);
249 mpegts_write_section1(&ts->pat, PAT_TID, ts->tsid, ts->tables_version, 0, 0,
253 static int mpegts_write_pmt(AVFormatContext *s, MpegTSService *service)
255 MpegTSWrite *ts = s->priv_data;
256 uint8_t data[SECTION_LENGTH], *q, *desc_length_ptr, *program_info_length_ptr;
257 int val, stream_type, i, err = 0;
260 put16(&q, 0xe000 | service->pcr_pid);
262 program_info_length_ptr = q;
263 q += 2; /* patched after */
265 /* put program info here */
267 val = 0xf000 | (q - program_info_length_ptr - 2);
268 program_info_length_ptr[0] = val >> 8;
269 program_info_length_ptr[1] = val;
271 for (i = 0; i < s->nb_streams; i++) {
272 AVStream *st = s->streams[i];
273 MpegTSWriteStream *ts_st = st->priv_data;
274 AVDictionaryEntry *lang = av_dict_get(st->metadata, "language", NULL, 0);
276 if (s->nb_programs) {
277 AVProgram *program = av_find_program_from_stream(s, NULL, i);
278 if (program->id != service->sid)
282 if (q - data > SECTION_LENGTH - 32) {
286 switch (st->codec->codec_id) {
287 case AV_CODEC_ID_MPEG1VIDEO:
288 case AV_CODEC_ID_MPEG2VIDEO:
289 stream_type = STREAM_TYPE_VIDEO_MPEG2;
291 case AV_CODEC_ID_MPEG4:
292 stream_type = STREAM_TYPE_VIDEO_MPEG4;
294 case AV_CODEC_ID_H264:
295 stream_type = STREAM_TYPE_VIDEO_H264;
297 case AV_CODEC_ID_HEVC:
298 stream_type = STREAM_TYPE_VIDEO_HEVC;
300 case AV_CODEC_ID_CAVS:
301 stream_type = STREAM_TYPE_VIDEO_CAVS;
303 case AV_CODEC_ID_DIRAC:
304 stream_type = STREAM_TYPE_VIDEO_DIRAC;
306 case AV_CODEC_ID_VC1:
307 stream_type = STREAM_TYPE_VIDEO_VC1;
309 case AV_CODEC_ID_MP2:
310 case AV_CODEC_ID_MP3:
311 stream_type = STREAM_TYPE_AUDIO_MPEG1;
313 case AV_CODEC_ID_AAC:
314 stream_type = (ts->flags & MPEGTS_FLAG_AAC_LATM)
315 ? STREAM_TYPE_AUDIO_AAC_LATM
316 : STREAM_TYPE_AUDIO_AAC;
318 case AV_CODEC_ID_AAC_LATM:
319 stream_type = STREAM_TYPE_AUDIO_AAC_LATM;
321 case AV_CODEC_ID_AC3:
322 stream_type = STREAM_TYPE_AUDIO_AC3;
324 case AV_CODEC_ID_DTS:
325 stream_type = STREAM_TYPE_AUDIO_DTS;
327 case AV_CODEC_ID_TRUEHD:
328 stream_type = STREAM_TYPE_AUDIO_TRUEHD;
330 case AV_CODEC_ID_OPUS:
331 stream_type = STREAM_TYPE_PRIVATE_DATA;
334 stream_type = STREAM_TYPE_PRIVATE_DATA;
339 put16(&q, 0xe000 | ts_st->pid);
341 q += 2; /* patched after */
343 /* write optional descriptors here */
344 switch (st->codec->codec_type) {
345 case AVMEDIA_TYPE_AUDIO:
346 if (st->codec->codec_id==AV_CODEC_ID_EAC3) {
347 *q++=0x7a; // EAC3 descriptor see A038 DVB SI
348 *q++=1; // 1 byte, all flags sets to 0
349 *q++=0; // omit all fields...
351 if (st->codec->codec_id==AV_CODEC_ID_S302M) {
352 *q++ = 0x05; /* MPEG-2 registration descriptor*/
359 if (st->codec->codec_id==AV_CODEC_ID_OPUS) {
360 /* 6 bytes registration descriptor, 4 bytes Opus audio descriptor */
361 if (q - data > SECTION_LENGTH - 6 - 4) {
366 *q++ = 0x05; /* MPEG-2 registration descriptor*/
373 *q++ = 0x7f; /* DVB extension descriptor */
377 if (st->codec->extradata && st->codec->extradata_size >= 19) {
378 if (st->codec->extradata[18] == 0 && st->codec->channels <= 2) {
379 /* RTP mapping family */
380 *q++ = st->codec->channels;
381 } else if (st->codec->extradata[18] == 1 && st->codec->channels <= 8 &&
382 st->codec->extradata_size >= 21 + st->codec->channels) {
383 static const uint8_t coupled_stream_counts[9] = {
384 1, 0, 1, 1, 2, 2, 2, 3, 3
386 static const uint8_t channel_map_a[8][8] = {
393 {0, 4, 1, 2, 3, 5, 6},
394 {0, 6, 1, 2, 3, 4, 5, 7},
396 static const uint8_t channel_map_b[8][8] = {
403 {0, 1, 2, 3, 4, 5, 6},
404 {0, 1, 2, 3, 4, 5, 6, 7},
406 /* Vorbis mapping family */
408 if (st->codec->extradata[19] == st->codec->channels - coupled_stream_counts[st->codec->channels] &&
409 st->codec->extradata[20] == coupled_stream_counts[st->codec->channels] &&
410 memcmp(&st->codec->extradata[21], channel_map_a[st->codec->channels-1], st->codec->channels) == 0) {
411 *q++ = st->codec->channels;
412 } else if (st->codec->channels >= 2 && st->codec->extradata[19] == st->codec->channels &&
413 st->codec->extradata[20] == 0 &&
414 memcmp(&st->codec->extradata[21], channel_map_b[st->codec->channels-1], st->codec->channels) == 0) {
415 *q++ = st->codec->channels | 0x80;
417 /* Unsupported, could write an extended descriptor here */
418 av_log(s, AV_LOG_ERROR, "Unsupported Opus Vorbis-style channel mapping");
423 av_log(s, AV_LOG_ERROR, "Unsupported Opus channel mapping for family %d", st->codec->extradata[18]);
426 } else if (st->codec->channels <= 2) {
427 /* Assume RTP mapping family */
428 *q++ = st->codec->channels;
431 av_log(s, AV_LOG_ERROR, "Unsupported Opus channel mapping");
438 char *next = lang->value;
441 *q++ = 0x0a; /* ISO 639 language descriptor */
445 for (p = lang->value; next && *len_ptr < 255 / 4 * 4; p = next + 1) {
446 if (q - data > SECTION_LENGTH - 4) {
450 next = strchr(p, ',');
451 if (strlen(p) != 3 && (!next || next != p + 3))
452 continue; /* not a 3-letter code */
458 if (st->disposition & AV_DISPOSITION_CLEAN_EFFECTS)
460 else if (st->disposition & AV_DISPOSITION_HEARING_IMPAIRED)
462 else if (st->disposition & AV_DISPOSITION_VISUAL_IMPAIRED)
465 *q++ = 0; /* undefined type */
471 q -= 2; /* no language codes were written */
474 case AVMEDIA_TYPE_SUBTITLE:
476 const char default_language[] = "und";
477 const char *language = lang && strlen(lang->value) >= 3 ? lang->value : default_language;
479 if (st->codec->codec_id == AV_CODEC_ID_DVB_SUBTITLE) {
481 int extradata_copied = 0;
483 *q++ = 0x59; /* subtitling_descriptor */
486 while (strlen(language) >= 3) {
487 if (sizeof(data) - (q - data) < 8) { /* 8 bytes per DVB subtitle substream data */
495 if (*language != '\0')
498 if (st->codec->extradata_size - extradata_copied >= 5) {
499 *q++ = st->codec->extradata[extradata_copied + 4]; /* subtitling_type */
500 memcpy(q, st->codec->extradata + extradata_copied, 4); /* composition_page_id and ancillary_page_id */
501 extradata_copied += 5;
505 * 0x10 - normal with no monitor aspect ratio criticality
506 * 0x20 - for the hard of hearing with no monitor aspect ratio criticality */
507 *q++ = (st->disposition & AV_DISPOSITION_HEARING_IMPAIRED) ? 0x20 : 0x10;
508 if ((st->codec->extradata_size == 4) && (extradata_copied == 0)) {
509 /* support of old 4-byte extradata format */
510 memcpy(q, st->codec->extradata, 4); /* composition_page_id and ancillary_page_id */
511 extradata_copied += 4;
514 put16(&q, 1); /* composition_page_id */
515 put16(&q, 1); /* ancillary_page_id */
520 *len_ptr = q - len_ptr - 1;
521 } else if (st->codec->codec_id == AV_CODEC_ID_DVB_TELETEXT) {
522 uint8_t *len_ptr = NULL;
523 int extradata_copied = 0;
525 /* The descriptor tag. teletext_descriptor */
529 while (strlen(language) >= 3 && q - data < sizeof(data) - 6) {
534 if (*language != '\0')
537 if (st->codec->extradata_size - 1 > extradata_copied) {
538 memcpy(q, st->codec->extradata + extradata_copied, 2);
539 extradata_copied += 2;
542 /* The Teletext descriptor:
543 * teletext_type: This 5-bit field indicates the type of Teletext page indicated. (0x01 Initial Teletext page)
544 * teletext_magazine_number: This is a 3-bit field which identifies the magazine number.
545 * teletext_page_number: This is an 8-bit field giving two 4-bit hex digits identifying the page number. */
551 *len_ptr = q - len_ptr - 1;
555 case AVMEDIA_TYPE_VIDEO:
556 if (stream_type == STREAM_TYPE_VIDEO_DIRAC) {
557 *q++ = 0x05; /*MPEG-2 registration descriptor*/
563 } else if (stream_type == STREAM_TYPE_VIDEO_VC1) {
564 *q++ = 0x05; /*MPEG-2 registration descriptor*/
572 case AVMEDIA_TYPE_DATA:
573 if (st->codec->codec_id == AV_CODEC_ID_SMPTE_KLV) {
574 *q++ = 0x05; /* MPEG-2 registration descriptor */
584 val = 0xf000 | (q - desc_length_ptr - 2);
585 desc_length_ptr[0] = val >> 8;
586 desc_length_ptr[1] = val;
590 av_log(s, AV_LOG_ERROR,
591 "The PMT section cannot fit stream %d and all following streams.\n"
592 "Try reducing the number of languages in the audio streams "
593 "or the total number of streams.\n", i);
595 mpegts_write_section1(&service->pmt, PMT_TID, service->sid, ts->tables_version, 0, 0,
600 /* NOTE: !str is accepted for an empty string */
601 static void putstr8(uint8_t **q_ptr, const char *str)
617 static void mpegts_write_sdt(AVFormatContext *s)
619 MpegTSWrite *ts = s->priv_data;
620 MpegTSService *service;
621 uint8_t data[SECTION_LENGTH], *q, *desc_list_len_ptr, *desc_len_ptr;
622 int i, running_status, free_ca_mode, val;
627 for (i = 0; i < ts->nb_services; i++) {
628 service = ts->services[i];
629 put16(&q, service->sid);
630 *q++ = 0xfc | 0x00; /* currently no EIT info */
631 desc_list_len_ptr = q;
633 running_status = 4; /* running */
636 /* write only one descriptor for the service name and provider */
640 *q++ = ts->service_type;
641 putstr8(&q, service->provider_name);
642 putstr8(&q, service->name);
643 desc_len_ptr[0] = q - desc_len_ptr - 1;
645 /* fill descriptor length */
646 val = (running_status << 13) | (free_ca_mode << 12) |
647 (q - desc_list_len_ptr - 2);
648 desc_list_len_ptr[0] = val >> 8;
649 desc_list_len_ptr[1] = val;
651 mpegts_write_section1(&ts->sdt, SDT_TID, ts->tsid, ts->tables_version, 0, 0,
655 static MpegTSService *mpegts_add_service(MpegTSWrite *ts, int sid,
656 const char *provider_name,
659 MpegTSService *service;
661 service = av_mallocz(sizeof(MpegTSService));
664 service->pmt.pid = ts->pmt_start_pid + ts->nb_services;
666 service->pcr_pid = 0x1fff;
667 service->provider_name = av_strdup(provider_name);
668 service->name = av_strdup(name);
669 if (!service->provider_name || !service->name)
671 if (av_dynarray_add_nofree(&ts->services, &ts->nb_services, service) < 0)
676 av_freep(&service->provider_name);
677 av_freep(&service->name);
682 static int64_t get_pcr(const MpegTSWrite *ts, AVIOContext *pb)
684 return av_rescale(avio_tell(pb) + 11, 8 * PCR_TIME_BASE, ts->mux_rate) +
688 static void mpegts_prefix_m2ts_header(AVFormatContext *s)
690 MpegTSWrite *ts = s->priv_data;
692 int64_t pcr = get_pcr(s->priv_data, s->pb);
693 uint32_t tp_extra_header = pcr % 0x3fffffff;
694 tp_extra_header = AV_RB32(&tp_extra_header);
695 avio_write(s->pb, (unsigned char *) &tp_extra_header,
696 sizeof(tp_extra_header));
700 static void section_write_packet(MpegTSSection *s, const uint8_t *packet)
702 AVFormatContext *ctx = s->opaque;
703 mpegts_prefix_m2ts_header(ctx);
704 avio_write(ctx->pb, packet, TS_PACKET_SIZE);
707 static int mpegts_write_header(AVFormatContext *s)
709 MpegTSWrite *ts = s->priv_data;
710 MpegTSWriteStream *ts_st;
711 MpegTSService *service;
712 AVStream *st, *pcr_st = NULL;
713 AVDictionaryEntry *title, *provider;
715 const char *service_name;
716 const char *provider_name;
720 if (s->max_delay < 0) /* Not set by the caller */
723 // round up to a whole number of TS packets
724 ts->pes_payload_size = (ts->pes_payload_size + 14 + 183) / 184 * 184 - 14;
726 ts->tsid = ts->transport_stream_id;
727 ts->onid = ts->original_network_id;
728 if (!s->nb_programs) {
729 /* allocate a single DVB service */
730 title = av_dict_get(s->metadata, "service_name", NULL, 0);
732 title = av_dict_get(s->metadata, "title", NULL, 0);
733 service_name = title ? title->value : DEFAULT_SERVICE_NAME;
734 provider = av_dict_get(s->metadata, "service_provider", NULL, 0);
735 provider_name = provider ? provider->value : DEFAULT_PROVIDER_NAME;
736 service = mpegts_add_service(ts, ts->service_id,
737 provider_name, service_name);
740 return AVERROR(ENOMEM);
742 service->pmt.write_packet = section_write_packet;
743 service->pmt.opaque = s;
744 service->pmt.cc = 15;
746 for (i = 0; i < s->nb_programs; i++) {
747 AVProgram *program = s->programs[i];
748 title = av_dict_get(program->metadata, "service_name", NULL, 0);
750 title = av_dict_get(program->metadata, "title", NULL, 0);
751 service_name = title ? title->value : DEFAULT_SERVICE_NAME;
752 provider = av_dict_get(program->metadata, "service_provider", NULL, 0);
753 provider_name = provider ? provider->value : DEFAULT_PROVIDER_NAME;
754 service = mpegts_add_service(ts, program->id,
755 provider_name, service_name);
758 return AVERROR(ENOMEM);
760 service->pmt.write_packet = section_write_packet;
761 service->pmt.opaque = s;
762 service->pmt.cc = 15;
766 ts->pat.pid = PAT_PID;
767 /* Initialize at 15 so that it wraps and is equal to 0 for the
768 * first packet we write. */
770 ts->pat.write_packet = section_write_packet;
773 ts->sdt.pid = SDT_PID;
775 ts->sdt.write_packet = section_write_packet;
778 pids = av_malloc_array(s->nb_streams, sizeof(*pids));
780 ret = AVERROR(ENOMEM);
784 /* assign pids to each stream */
785 for (i = 0; i < s->nb_streams; i++) {
788 ts_st = av_mallocz(sizeof(MpegTSWriteStream));
790 ret = AVERROR(ENOMEM);
793 st->priv_data = ts_st;
795 ts_st->user_tb = st->time_base;
796 avpriv_set_pts_info(st, 33, 1, 90000);
798 ts_st->payload = av_mallocz(ts->pes_payload_size);
799 if (!ts_st->payload) {
800 ret = AVERROR(ENOMEM);
803 ts_st->service = service;
804 /* MPEG pid values < 16 are reserved. Applications which set st->id in
805 * this range are assigned a calculated pid. */
807 ts_st->pid = ts->start_pid + i;
808 } else if (st->id < 0x1FFF) {
811 av_log(s, AV_LOG_ERROR,
812 "Invalid stream id %d, must be less than 8191\n", st->id);
813 ret = AVERROR(EINVAL);
816 if (ts_st->pid == service->pmt.pid) {
817 av_log(s, AV_LOG_ERROR, "Duplicate stream id %d\n", ts_st->pid);
818 ret = AVERROR(EINVAL);
821 for (j = 0; j < i; j++) {
822 if (pids[j] == ts_st->pid) {
823 av_log(s, AV_LOG_ERROR, "Duplicate stream id %d\n", ts_st->pid);
824 ret = AVERROR(EINVAL);
828 pids[i] = ts_st->pid;
829 ts_st->payload_pts = AV_NOPTS_VALUE;
830 ts_st->payload_dts = AV_NOPTS_VALUE;
831 ts_st->first_pts_check = 1;
833 /* update PCR pid by using the first video stream */
834 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO &&
835 service->pcr_pid == 0x1fff) {
836 service->pcr_pid = ts_st->pid;
839 if (st->codec->codec_id == AV_CODEC_ID_AAC &&
840 st->codec->extradata_size > 0) {
842 ts_st->amux = avformat_alloc_context();
844 ret = AVERROR(ENOMEM);
847 ts_st->amux->oformat =
848 av_guess_format((ts->flags & MPEGTS_FLAG_AAC_LATM) ? "latm" : "adts",
850 if (!ts_st->amux->oformat) {
851 ret = AVERROR(EINVAL);
854 if (!(ast = avformat_new_stream(ts_st->amux, NULL))) {
855 ret = AVERROR(ENOMEM);
858 ret = avcodec_copy_context(ast->codec, st->codec);
861 ast->time_base = st->time_base;
862 ret = avformat_write_header(ts_st->amux, NULL);
866 if (st->codec->codec_id == AV_CODEC_ID_OPUS) {
867 ts_st->opus_pending_trim_start = st->codec->initial_padding * 48000 / st->codec->sample_rate;
873 /* if no video stream, use the first stream as PCR */
874 if (service->pcr_pid == 0x1fff && s->nb_streams > 0) {
875 pcr_st = s->streams[0];
876 ts_st = pcr_st->priv_data;
877 service->pcr_pid = ts_st->pid;
879 ts_st = pcr_st->priv_data;
881 if (ts->mux_rate > 1) {
882 service->pcr_packet_period = (int64_t)ts->mux_rate * ts->pcr_period /
883 (TS_PACKET_SIZE * 8 * 1000);
884 ts->sdt_packet_period = (int64_t)ts->mux_rate * SDT_RETRANS_TIME /
885 (TS_PACKET_SIZE * 8 * 1000);
886 ts->pat_packet_period = (int64_t)ts->mux_rate * PAT_RETRANS_TIME /
887 (TS_PACKET_SIZE * 8 * 1000);
890 ts->first_pcr = av_rescale(s->max_delay, PCR_TIME_BASE, AV_TIME_BASE);
892 /* Arbitrary values, PAT/PMT will also be written on video key frames */
893 ts->sdt_packet_period = 200;
894 ts->pat_packet_period = 40;
895 if (pcr_st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
896 if (!pcr_st->codec->frame_size) {
897 av_log(s, AV_LOG_WARNING, "frame size not set\n");
898 service->pcr_packet_period =
899 pcr_st->codec->sample_rate / (10 * 512);
901 service->pcr_packet_period =
902 pcr_st->codec->sample_rate / (10 * pcr_st->codec->frame_size);
905 // max delta PCR 0.1s
906 // TODO: should be avg_frame_rate
907 service->pcr_packet_period =
908 ts_st->user_tb.den / (10 * ts_st->user_tb.num);
910 if (!service->pcr_packet_period)
911 service->pcr_packet_period = 1;
914 ts->last_pat_ts = AV_NOPTS_VALUE;
915 ts->last_sdt_ts = AV_NOPTS_VALUE;
916 // The user specified a period, use only it
917 if (ts->pat_period < INT_MAX/2) {
918 ts->pat_packet_period = INT_MAX;
920 if (ts->sdt_period < INT_MAX/2) {
921 ts->sdt_packet_period = INT_MAX;
924 // output a PCR as soon as possible
925 service->pcr_packet_count = service->pcr_packet_period;
926 ts->pat_packet_count = ts->pat_packet_period - 1;
927 ts->sdt_packet_count = ts->sdt_packet_period - 1;
929 if (ts->mux_rate == 1)
930 av_log(s, AV_LOG_VERBOSE, "muxrate VBR, ");
932 av_log(s, AV_LOG_VERBOSE, "muxrate %d, ", ts->mux_rate);
933 av_log(s, AV_LOG_VERBOSE,
934 "pcr every %d pkts, sdt every %d, pat/pmt every %d pkts\n",
935 service->pcr_packet_period,
936 ts->sdt_packet_period, ts->pat_packet_period);
938 if (ts->m2ts_mode == -1) {
939 if (av_match_ext(s->filename, "m2ts")) {
950 for (i = 0; i < s->nb_streams; i++) {
952 ts_st = st->priv_data;
954 av_freep(&ts_st->payload);
956 avformat_free_context(ts_st->amux);
960 av_freep(&st->priv_data);
963 for (i = 0; i < ts->nb_services; i++) {
964 service = ts->services[i];
965 av_freep(&service->provider_name);
966 av_freep(&service->name);
969 av_freep(&ts->services);
973 /* send SDT, PAT and PMT tables regulary */
974 static void retransmit_si_info(AVFormatContext *s, int force_pat, int64_t dts)
976 MpegTSWrite *ts = s->priv_data;
979 if (++ts->sdt_packet_count == ts->sdt_packet_period ||
980 (dts != AV_NOPTS_VALUE && ts->last_sdt_ts == AV_NOPTS_VALUE) ||
981 (dts != AV_NOPTS_VALUE && dts - ts->last_sdt_ts >= ts->sdt_period*90000.0)
983 ts->sdt_packet_count = 0;
984 if (dts != AV_NOPTS_VALUE)
985 ts->last_sdt_ts = FFMAX(dts, ts->last_sdt_ts);
988 if (++ts->pat_packet_count == ts->pat_packet_period ||
989 (dts != AV_NOPTS_VALUE && ts->last_pat_ts == AV_NOPTS_VALUE) ||
990 (dts != AV_NOPTS_VALUE && dts - ts->last_pat_ts >= ts->pat_period*90000.0) ||
992 ts->pat_packet_count = 0;
993 if (dts != AV_NOPTS_VALUE)
994 ts->last_pat_ts = FFMAX(dts, ts->last_pat_ts);
996 for (i = 0; i < ts->nb_services; i++)
997 mpegts_write_pmt(s, ts->services[i]);
1001 static int write_pcr_bits(uint8_t *buf, int64_t pcr)
1003 int64_t pcr_low = pcr % 300, pcr_high = pcr / 300;
1005 *buf++ = pcr_high >> 25;
1006 *buf++ = pcr_high >> 17;
1007 *buf++ = pcr_high >> 9;
1008 *buf++ = pcr_high >> 1;
1009 *buf++ = pcr_high << 7 | pcr_low >> 8 | 0x7e;
1015 /* Write a single null transport stream packet */
1016 static void mpegts_insert_null_packet(AVFormatContext *s)
1019 uint8_t buf[TS_PACKET_SIZE];
1026 memset(q, 0x0FF, TS_PACKET_SIZE - (q - buf));
1027 mpegts_prefix_m2ts_header(s);
1028 avio_write(s->pb, buf, TS_PACKET_SIZE);
1031 /* Write a single transport stream packet with a PCR and no payload */
1032 static void mpegts_insert_pcr_only(AVFormatContext *s, AVStream *st)
1034 MpegTSWrite *ts = s->priv_data;
1035 MpegTSWriteStream *ts_st = st->priv_data;
1037 uint8_t buf[TS_PACKET_SIZE];
1041 *q++ = ts_st->pid >> 8;
1043 *q++ = 0x20 | ts_st->cc; /* Adaptation only */
1044 /* Continuity Count field does not increment (see 13818-1 section 2.4.3.3) */
1045 *q++ = TS_PACKET_SIZE - 5; /* Adaptation Field Length */
1046 *q++ = 0x10; /* Adaptation flags: PCR present */
1048 /* PCR coded into 6 bytes */
1049 q += write_pcr_bits(q, get_pcr(ts, s->pb));
1051 /* stuffing bytes */
1052 memset(q, 0xFF, TS_PACKET_SIZE - (q - buf));
1053 mpegts_prefix_m2ts_header(s);
1054 avio_write(s->pb, buf, TS_PACKET_SIZE);
1057 static void write_pts(uint8_t *q, int fourbits, int64_t pts)
1061 val = fourbits << 4 | (((pts >> 30) & 0x07) << 1) | 1;
1063 val = (((pts >> 15) & 0x7fff) << 1) | 1;
1066 val = (((pts) & 0x7fff) << 1) | 1;
1071 /* Set an adaptation field flag in an MPEG-TS packet*/
1072 static void set_af_flag(uint8_t *pkt, int flag)
1074 // expect at least one flag to set
1077 if ((pkt[3] & 0x20) == 0) {
1078 // no AF yet, set adaptation field flag
1080 // 1 byte length, no flags
1087 /* Extend the adaptation field by size bytes */
1088 static void extend_af(uint8_t *pkt, int size)
1090 // expect already existing adaptation field
1091 av_assert0(pkt[3] & 0x20);
1095 /* Get a pointer to MPEG-TS payload (right after TS packet header) */
1096 static uint8_t *get_ts_payload_start(uint8_t *pkt)
1099 return pkt + 5 + pkt[4];
1104 /* Add a PES header to the front of the payload, and segment into an integer
1105 * number of TS packets. The final TS packet is padded using an oversized
1106 * adaptation header to exactly fill the last TS packet.
1107 * NOTE: 'payload' contains a complete PES payload. */
1108 static void mpegts_write_pes(AVFormatContext *s, AVStream *st,
1109 const uint8_t *payload, int payload_size,
1110 int64_t pts, int64_t dts, int key)
1112 MpegTSWriteStream *ts_st = st->priv_data;
1113 MpegTSWrite *ts = s->priv_data;
1114 uint8_t buf[TS_PACKET_SIZE];
1116 int val, is_start, len, header_len, write_pcr, is_dvb_subtitle, is_dvb_teletext, flags;
1117 int afc_len, stuffing_len;
1118 int64_t pcr = -1; /* avoid warning */
1119 int64_t delay = av_rescale(s->max_delay, 90000, AV_TIME_BASE);
1120 int force_pat = st->codec->codec_type == AVMEDIA_TYPE_VIDEO && key && !ts_st->prev_payload_key;
1122 av_assert0(ts_st->payload != buf || st->codec->codec_type != AVMEDIA_TYPE_VIDEO);
1123 if (ts->flags & MPEGTS_FLAG_PAT_PMT_AT_FRAMES && st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
1128 while (payload_size > 0) {
1129 retransmit_si_info(s, force_pat, dts);
1133 if (ts_st->pid == ts_st->service->pcr_pid) {
1134 if (ts->mux_rate > 1 || is_start) // VBR pcr period is based on frames
1135 ts_st->service->pcr_packet_count++;
1136 if (ts_st->service->pcr_packet_count >=
1137 ts_st->service->pcr_packet_period) {
1138 ts_st->service->pcr_packet_count = 0;
1143 if (ts->mux_rate > 1 && dts != AV_NOPTS_VALUE &&
1144 (dts - get_pcr(ts, s->pb) / 300) > delay) {
1145 /* pcr insert gets priority over null packet insert */
1147 mpegts_insert_pcr_only(s, st);
1149 mpegts_insert_null_packet(s);
1150 /* recalculate write_pcr and possibly retransmit si_info */
1154 /* prepare packet header */
1157 val = ts_st->pid >> 8;
1162 ts_st->cc = ts_st->cc + 1 & 0xf;
1163 *q++ = 0x10 | ts_st->cc; // payload indicator + CC
1164 if (key && is_start && pts != AV_NOPTS_VALUE) {
1165 // set Random Access for key frames
1166 if (ts_st->pid == ts_st->service->pcr_pid)
1168 set_af_flag(buf, 0x40);
1169 q = get_ts_payload_start(buf);
1172 set_af_flag(buf, 0x10);
1173 q = get_ts_payload_start(buf);
1174 // add 11, pcr references the last byte of program clock reference base
1175 if (ts->mux_rate > 1)
1176 pcr = get_pcr(ts, s->pb);
1178 pcr = (dts - delay) * 300;
1179 if (dts != AV_NOPTS_VALUE && dts < pcr / 300)
1180 av_log(s, AV_LOG_WARNING, "dts < pcr, TS is invalid\n");
1181 extend_af(buf, write_pcr_bits(q, pcr));
1182 q = get_ts_payload_start(buf);
1185 int pes_extension = 0;
1186 int pes_header_stuffing_bytes = 0;
1187 /* write PES header */
1191 is_dvb_subtitle = 0;
1192 is_dvb_teletext = 0;
1193 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
1194 if (st->codec->codec_id == AV_CODEC_ID_DIRAC)
1198 } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
1199 (st->codec->codec_id == AV_CODEC_ID_MP2 ||
1200 st->codec->codec_id == AV_CODEC_ID_MP3 ||
1201 st->codec->codec_id == AV_CODEC_ID_AAC)) {
1203 } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
1204 st->codec->codec_id == AV_CODEC_ID_AC3 &&
1209 if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE) {
1210 if (st->codec->codec_id == AV_CODEC_ID_DVB_SUBTITLE) {
1211 is_dvb_subtitle = 1;
1212 } else if (st->codec->codec_id == AV_CODEC_ID_DVB_TELETEXT) {
1213 is_dvb_teletext = 1;
1219 if (pts != AV_NOPTS_VALUE) {
1223 if (dts != AV_NOPTS_VALUE && pts != AV_NOPTS_VALUE && dts != pts) {
1227 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO &&
1228 st->codec->codec_id == AV_CODEC_ID_DIRAC) {
1229 /* set PES_extension_flag */
1233 /* One byte for PES2 extension flag +
1234 * one byte for extension length +
1235 * one byte for extension id */
1238 /* for Blu-ray AC3 Audio the PES Extension flag should be as follow
1239 * otherwise it will not play sound on blu-ray
1241 if (ts->m2ts_mode &&
1242 st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
1243 st->codec->codec_id == AV_CODEC_ID_AC3) {
1244 /* set PES_extension_flag */
1249 if (is_dvb_teletext) {
1250 pes_header_stuffing_bytes = 0x24 - header_len;
1253 len = payload_size + header_len + 3;
1254 /* 3 extra bytes should be added to DVB subtitle payload: 0x20 0x00 at the beginning and trailing 0xff */
1255 if (is_dvb_subtitle) {
1261 if (ts->omit_video_pes_length && st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
1267 /* data alignment indicator is required for subtitle and data streams */
1268 if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE || st->codec->codec_type == AVMEDIA_TYPE_DATA)
1273 if (pts != AV_NOPTS_VALUE) {
1274 write_pts(q, flags >> 6, pts);
1277 if (dts != AV_NOPTS_VALUE && pts != AV_NOPTS_VALUE && dts != pts) {
1278 write_pts(q, 1, dts);
1281 if (pes_extension && st->codec->codec_id == AV_CODEC_ID_DIRAC) {
1282 flags = 0x01; /* set PES_extension_flag_2 */
1284 *q++ = 0x80 | 0x01; /* marker bit + extension length */
1285 /* Set the stream ID extension flag bit to 0 and
1286 * write the extended stream ID. */
1289 /* For Blu-ray AC3 Audio Setting extended flags */
1290 if (ts->m2ts_mode &&
1292 st->codec->codec_id == AV_CODEC_ID_AC3) {
1293 flags = 0x01; /* set PES_extension_flag_2 */
1295 *q++ = 0x80 | 0x01; /* marker bit + extension length */
1296 *q++ = 0x00 | 0x71; /* for AC3 Audio (specifically on blue-rays) */
1300 if (is_dvb_subtitle) {
1301 /* First two fields of DVB subtitles PES data:
1302 * data_identifier: for DVB subtitle streams shall be coded with the value 0x20
1303 * subtitle_stream_id: for DVB subtitle stream shall be identified by the value 0x00 */
1307 if (is_dvb_teletext) {
1308 memset(q, 0xff, pes_header_stuffing_bytes);
1309 q += pes_header_stuffing_bytes;
1314 header_len = q - buf;
1316 len = TS_PACKET_SIZE - header_len;
1317 if (len > payload_size)
1319 stuffing_len = TS_PACKET_SIZE - header_len - len;
1320 if (stuffing_len > 0) {
1321 /* add stuffing with AFC */
1322 if (buf[3] & 0x20) {
1323 /* stuffing already present: increase its size */
1324 afc_len = buf[4] + 1;
1325 memmove(buf + 4 + afc_len + stuffing_len,
1327 header_len - (4 + afc_len));
1328 buf[4] += stuffing_len;
1329 memset(buf + 4 + afc_len, 0xff, stuffing_len);
1332 memmove(buf + 4 + stuffing_len, buf + 4, header_len - 4);
1334 buf[4] = stuffing_len - 1;
1335 if (stuffing_len >= 2) {
1337 memset(buf + 6, 0xff, stuffing_len - 2);
1342 if (is_dvb_subtitle && payload_size == len) {
1343 memcpy(buf + TS_PACKET_SIZE - len, payload, len - 1);
1344 buf[TS_PACKET_SIZE - 1] = 0xff; /* end_of_PES_data_field_marker: an 8-bit field with fixed contents 0xff for DVB subtitle */
1346 memcpy(buf + TS_PACKET_SIZE - len, payload, len);
1350 payload_size -= len;
1351 mpegts_prefix_m2ts_header(s);
1352 avio_write(s->pb, buf, TS_PACKET_SIZE);
1354 ts_st->prev_payload_key = key;
1357 int ff_check_h264_startcode(AVFormatContext *s, const AVStream *st, const AVPacket *pkt)
1359 if (pkt->size < 5 || AV_RB32(pkt->data) != 0x0000001 && AV_RB24(pkt->data) != 0x000001) {
1360 if (!st->nb_frames) {
1361 av_log(s, AV_LOG_ERROR, "H.264 bitstream malformed, "
1362 "no startcode found, use the video bitstream filter 'h264_mp4toannexb' to fix it "
1363 "('-bsf:v h264_mp4toannexb' option with ffmpeg)\n");
1364 return AVERROR_INVALIDDATA;
1366 av_log(s, AV_LOG_WARNING, "H.264 bitstream error, startcode missing, size %d", pkt->size);
1367 if (pkt->size) av_log(s, AV_LOG_WARNING, " data %08X", AV_RB32(pkt->data));
1368 av_log(s, AV_LOG_WARNING, "\n");
1373 static int check_hevc_startcode(AVFormatContext *s, const AVStream *st, const AVPacket *pkt)
1375 if (pkt->size < 5 || AV_RB32(pkt->data) != 0x0000001 && AV_RB24(pkt->data) != 0x000001) {
1376 if (!st->nb_frames) {
1377 av_log(s, AV_LOG_ERROR, "HEVC bitstream malformed, no startcode found\n");
1378 return AVERROR_PATCHWELCOME;
1380 av_log(s, AV_LOG_WARNING, "HEVC bitstream error, startcode missing, size %d", pkt->size);
1381 if (pkt->size) av_log(s, AV_LOG_WARNING, " data %08X", AV_RB32(pkt->data));
1382 av_log(s, AV_LOG_WARNING, "\n");
1387 /* Based on GStreamer's gst-plugins-base/ext/ogg/gstoggstream.c
1388 * Released under the LGPL v2.1+, written by
1389 * Vincent Penquerc'h <vincent.penquerch@collabora.co.uk>
1391 static int opus_get_packet_samples(AVFormatContext *s, AVPacket *pkt)
1393 static const int durations[32] = {
1394 480, 960, 1920, 2880, /* Silk NB */
1395 480, 960, 1920, 2880, /* Silk MB */
1396 480, 960, 1920, 2880, /* Silk WB */
1397 480, 960, /* Hybrid SWB */
1398 480, 960, /* Hybrid FB */
1399 120, 240, 480, 960, /* CELT NB */
1400 120, 240, 480, 960, /* CELT NB */
1401 120, 240, 480, 960, /* CELT NB */
1402 120, 240, 480, 960, /* CELT NB */
1404 int toc, frame_duration, nframes, duration;
1411 frame_duration = durations[toc >> 3];
1425 nframes = pkt->data[1] & 63;
1429 duration = nframes * frame_duration;
1430 if (duration > 5760) {
1431 av_log(s, AV_LOG_WARNING,
1432 "Opus packet duration > 120 ms, invalid");
1439 static int mpegts_write_packet_internal(AVFormatContext *s, AVPacket *pkt)
1441 AVStream *st = s->streams[pkt->stream_index];
1442 int size = pkt->size;
1443 uint8_t *buf = pkt->data;
1444 uint8_t *data = NULL;
1445 MpegTSWrite *ts = s->priv_data;
1446 MpegTSWriteStream *ts_st = st->priv_data;
1447 const int64_t delay = av_rescale(s->max_delay, 90000, AV_TIME_BASE) * 2;
1448 int64_t dts = pkt->dts, pts = pkt->pts;
1449 int opus_samples = 0;
1451 if (ts->reemit_pat_pmt) {
1452 av_log(s, AV_LOG_WARNING,
1453 "resend_headers option is deprecated, use -mpegts_flags resend_headers\n");
1454 ts->reemit_pat_pmt = 0;
1455 ts->flags |= MPEGTS_FLAG_REEMIT_PAT_PMT;
1458 if (ts->flags & MPEGTS_FLAG_REEMIT_PAT_PMT) {
1459 ts->pat_packet_count = ts->pat_packet_period - 1;
1460 ts->sdt_packet_count = ts->sdt_packet_period - 1;
1461 ts->flags &= ~MPEGTS_FLAG_REEMIT_PAT_PMT;
1464 if (ts->copyts < 1) {
1465 if (pts != AV_NOPTS_VALUE)
1467 if (dts != AV_NOPTS_VALUE)
1471 if (ts_st->first_pts_check && pts == AV_NOPTS_VALUE) {
1472 av_log(s, AV_LOG_ERROR, "first pts value must be set\n");
1473 return AVERROR_INVALIDDATA;
1475 ts_st->first_pts_check = 0;
1477 if (st->codec->codec_id == AV_CODEC_ID_H264) {
1478 const uint8_t *p = buf, *buf_end = p + size;
1479 uint32_t state = -1;
1480 int extradd = (pkt->flags & AV_PKT_FLAG_KEY) ? st->codec->extradata_size : 0;
1481 int ret = ff_check_h264_startcode(s, st, pkt);
1485 if (extradd && AV_RB24(st->codec->extradata) > 1)
1489 p = avpriv_find_start_code(p, buf_end, &state);
1490 av_log(s, AV_LOG_TRACE, "nal %d\n", state & 0x1f);
1491 if ((state & 0x1f) == 7)
1493 } while (p < buf_end && (state & 0x1f) != 9 &&
1494 (state & 0x1f) != 5 && (state & 0x1f) != 1);
1496 if ((state & 0x1f) != 5)
1498 if ((state & 0x1f) != 9) { // AUD NAL
1499 data = av_malloc(pkt->size + 6 + extradd);
1501 return AVERROR(ENOMEM);
1502 memcpy(data + 6, st->codec->extradata, extradd);
1503 memcpy(data + 6 + extradd, pkt->data, pkt->size);
1504 AV_WB32(data, 0x00000001);
1506 data[5] = 0xf0; // any slice type (0xe) + rbsp stop one bit
1508 size = pkt->size + 6 + extradd;
1510 } else if (st->codec->codec_id == AV_CODEC_ID_AAC) {
1511 if (pkt->size < 2) {
1512 av_log(s, AV_LOG_ERROR, "AAC packet too short\n");
1513 return AVERROR_INVALIDDATA;
1515 if ((AV_RB16(pkt->data) & 0xfff0) != 0xfff0) {
1520 av_log(s, AV_LOG_ERROR, "AAC bitstream not in ADTS format "
1521 "and extradata missing\n");
1523 return AVERROR_INVALIDDATA;
1525 av_init_packet(&pkt2);
1526 pkt2.data = pkt->data;
1527 pkt2.size = pkt->size;
1528 av_assert0(pkt->dts != AV_NOPTS_VALUE);
1529 pkt2.dts = av_rescale_q(pkt->dts, st->time_base, ts_st->amux->streams[0]->time_base);
1531 ret = avio_open_dyn_buf(&ts_st->amux->pb);
1533 return AVERROR(ENOMEM);
1535 ret = av_write_frame(ts_st->amux, &pkt2);
1537 ffio_free_dyn_buf(&ts_st->amux->pb);
1540 size = avio_close_dyn_buf(ts_st->amux->pb, &data);
1541 ts_st->amux->pb = NULL;
1545 } else if (st->codec->codec_id == AV_CODEC_ID_HEVC) {
1546 int ret = check_hevc_startcode(s, st, pkt);
1549 } else if (st->codec->codec_id == AV_CODEC_ID_OPUS) {
1550 if (pkt->size < 2) {
1551 av_log(s, AV_LOG_ERROR, "Opus packet too short\n");
1552 return AVERROR_INVALIDDATA;
1555 /* Add Opus control header */
1556 if ((AV_RB16(pkt->data) >> 5) != 0x3ff) {
1560 int ctrl_header_size;
1561 int trim_start = 0, trim_end = 0;
1563 opus_samples = opus_get_packet_samples(s, pkt);
1565 side_data = av_packet_get_side_data(pkt,
1566 AV_PKT_DATA_SKIP_SAMPLES,
1569 if (side_data && side_data_size >= 10) {
1570 trim_end = AV_RL32(side_data + 4) * 48000 / st->codec->sample_rate;
1573 ctrl_header_size = pkt->size + 2 + pkt->size / 255 + 1;
1574 if (ts_st->opus_pending_trim_start)
1575 ctrl_header_size += 2;
1577 ctrl_header_size += 2;
1579 data = av_malloc(ctrl_header_size);
1581 return AVERROR(ENOMEM);
1585 if (ts_st->opus_pending_trim_start)
1593 data[i] = FFMIN(n, 255);
1598 av_assert0(2 + pkt->size / 255 + 1 == i);
1600 if (ts_st->opus_pending_trim_start) {
1601 trim_start = FFMIN(ts_st->opus_pending_trim_start, opus_samples);
1602 AV_WB16(data + i, trim_start);
1604 ts_st->opus_pending_trim_start -= trim_start;
1607 trim_end = FFMIN(trim_end, opus_samples - trim_start);
1608 AV_WB16(data + i, trim_end);
1612 memcpy(data + i, pkt->data, pkt->size);
1614 size = ctrl_header_size;
1616 /* TODO: Can we get TS formatted data here? If so we will
1617 * need to count the samples of that too! */
1618 av_log(s, AV_LOG_WARNING, "Got MPEG-TS formatted Opus data, unhandled");
1622 if (pkt->dts != AV_NOPTS_VALUE) {
1624 for(i=0; i<s->nb_streams; i++) {
1625 AVStream *st2 = s->streams[i];
1626 MpegTSWriteStream *ts_st2 = st2->priv_data;
1627 if ( ts_st2->payload_size
1628 && (ts_st2->payload_dts == AV_NOPTS_VALUE || dts - ts_st2->payload_dts > delay/2)) {
1629 mpegts_write_pes(s, st2, ts_st2->payload, ts_st2->payload_size,
1630 ts_st2->payload_pts, ts_st2->payload_dts,
1631 ts_st2->payload_flags & AV_PKT_FLAG_KEY);
1632 ts_st2->payload_size = 0;
1637 if (ts_st->payload_size && (ts_st->payload_size + size > ts->pes_payload_size ||
1638 (dts != AV_NOPTS_VALUE && ts_st->payload_dts != AV_NOPTS_VALUE &&
1639 av_compare_ts(dts - ts_st->payload_dts, st->time_base,
1640 s->max_delay, AV_TIME_BASE_Q) >= 0) ||
1641 ts_st->opus_queued_samples + opus_samples >= 5760 /* 120ms */)) {
1642 mpegts_write_pes(s, st, ts_st->payload, ts_st->payload_size,
1643 ts_st->payload_pts, ts_st->payload_dts,
1644 ts_st->payload_flags & AV_PKT_FLAG_KEY);
1645 ts_st->payload_size = 0;
1646 ts_st->opus_queued_samples = 0;
1649 if (st->codec->codec_type != AVMEDIA_TYPE_AUDIO || size > ts->pes_payload_size) {
1650 av_assert0(!ts_st->payload_size);
1651 // for video and subtitle, write a single pes packet
1652 mpegts_write_pes(s, st, buf, size, pts, dts,
1653 pkt->flags & AV_PKT_FLAG_KEY);
1654 ts_st->opus_queued_samples = 0;
1659 if (!ts_st->payload_size) {
1660 ts_st->payload_pts = pts;
1661 ts_st->payload_dts = dts;
1662 ts_st->payload_flags = pkt->flags;
1665 memcpy(ts_st->payload + ts_st->payload_size, buf, size);
1666 ts_st->payload_size += size;
1667 ts_st->opus_queued_samples += opus_samples;
1674 static void mpegts_write_flush(AVFormatContext *s)
1678 /* flush current packets */
1679 for (i = 0; i < s->nb_streams; i++) {
1680 AVStream *st = s->streams[i];
1681 MpegTSWriteStream *ts_st = st->priv_data;
1682 if (ts_st->payload_size > 0) {
1683 mpegts_write_pes(s, st, ts_st->payload, ts_st->payload_size,
1684 ts_st->payload_pts, ts_st->payload_dts,
1685 ts_st->payload_flags & AV_PKT_FLAG_KEY);
1686 ts_st->payload_size = 0;
1687 ts_st->opus_queued_samples = 0;
1692 static int mpegts_write_packet(AVFormatContext *s, AVPacket *pkt)
1695 mpegts_write_flush(s);
1698 return mpegts_write_packet_internal(s, pkt);
1702 static int mpegts_write_end(AVFormatContext *s)
1704 MpegTSWrite *ts = s->priv_data;
1705 MpegTSService *service;
1709 mpegts_write_flush(s);
1711 for (i = 0; i < s->nb_streams; i++) {
1712 AVStream *st = s->streams[i];
1713 MpegTSWriteStream *ts_st = st->priv_data;
1714 av_freep(&ts_st->payload);
1716 avformat_free_context(ts_st->amux);
1721 for (i = 0; i < ts->nb_services; i++) {
1722 service = ts->services[i];
1723 av_freep(&service->provider_name);
1724 av_freep(&service->name);
1727 av_freep(&ts->services);
1732 static const AVOption options[] = {
1733 { "mpegts_transport_stream_id", "Set transport_stream_id field.",
1734 offsetof(MpegTSWrite, transport_stream_id), AV_OPT_TYPE_INT,
1735 { .i64 = 0x0001 }, 0x0001, 0xffff, AV_OPT_FLAG_ENCODING_PARAM },
1736 { "mpegts_original_network_id", "Set original_network_id field.",
1737 offsetof(MpegTSWrite, original_network_id), AV_OPT_TYPE_INT,
1738 { .i64 = 0x0001 }, 0x0001, 0xffff, AV_OPT_FLAG_ENCODING_PARAM },
1739 { "mpegts_service_id", "Set service_id field.",
1740 offsetof(MpegTSWrite, service_id), AV_OPT_TYPE_INT,
1741 { .i64 = 0x0001 }, 0x0001, 0xffff, AV_OPT_FLAG_ENCODING_PARAM },
1742 { "mpegts_service_type", "Set service_type field.",
1743 offsetof(MpegTSWrite, service_type), AV_OPT_TYPE_INT,
1744 { .i64 = 0x01 }, 0x01, 0xff, AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
1745 { "digital_tv", "Digital Television.",
1746 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_DIGITAL_TV }, 0x01, 0xff,
1747 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
1748 { "digital_radio", "Digital Radio.",
1749 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_DIGITAL_RADIO }, 0x01, 0xff,
1750 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
1751 { "teletext", "Teletext.",
1752 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_TELETEXT }, 0x01, 0xff,
1753 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
1754 { "advanced_codec_digital_radio", "Advanced Codec Digital Radio.",
1755 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_ADVANCED_CODEC_DIGITAL_RADIO }, 0x01, 0xff,
1756 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
1757 { "mpeg2_digital_hdtv", "MPEG2 Digital HDTV.",
1758 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_MPEG2_DIGITAL_HDTV }, 0x01, 0xff,
1759 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
1760 { "advanced_codec_digital_sdtv", "Advanced Codec Digital SDTV.",
1761 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_ADVANCED_CODEC_DIGITAL_SDTV }, 0x01, 0xff,
1762 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
1763 { "advanced_codec_digital_hdtv", "Advanced Codec Digital HDTV.",
1764 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_ADVANCED_CODEC_DIGITAL_HDTV }, 0x01, 0xff,
1765 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
1766 { "mpegts_pmt_start_pid", "Set the first pid of the PMT.",
1767 offsetof(MpegTSWrite, pmt_start_pid), AV_OPT_TYPE_INT,
1768 { .i64 = 0x1000 }, 0x0010, 0x1f00, AV_OPT_FLAG_ENCODING_PARAM },
1769 { "mpegts_start_pid", "Set the first pid.",
1770 offsetof(MpegTSWrite, start_pid), AV_OPT_TYPE_INT,
1771 { .i64 = 0x0100 }, 0x0020, 0x0f00, AV_OPT_FLAG_ENCODING_PARAM },
1772 { "mpegts_m2ts_mode", "Enable m2ts mode.",
1773 offsetof(MpegTSWrite, m2ts_mode), AV_OPT_TYPE_BOOL,
1774 { .i64 = -1 }, -1, 1, AV_OPT_FLAG_ENCODING_PARAM },
1776 offsetof(MpegTSWrite, mux_rate), AV_OPT_TYPE_INT,
1777 { .i64 = 1 }, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
1778 { "pes_payload_size", "Minimum PES packet payload in bytes",
1779 offsetof(MpegTSWrite, pes_payload_size), AV_OPT_TYPE_INT,
1780 { .i64 = DEFAULT_PES_PAYLOAD_SIZE }, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
1781 { "mpegts_flags", "MPEG-TS muxing flags",
1782 offsetof(MpegTSWrite, flags), AV_OPT_TYPE_FLAGS, { .i64 = 0 }, 0, INT_MAX,
1783 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_flags" },
1784 { "resend_headers", "Reemit PAT/PMT before writing the next packet",
1785 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_FLAG_REEMIT_PAT_PMT }, 0, INT_MAX,
1786 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_flags" },
1787 { "latm", "Use LATM packetization for AAC",
1788 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_FLAG_AAC_LATM }, 0, INT_MAX,
1789 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_flags" },
1790 { "pat_pmt_at_frames", "Reemit PAT and PMT at each video frame",
1791 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_FLAG_PAT_PMT_AT_FRAMES}, 0, INT_MAX,
1792 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_flags" },
1793 // backward compatibility
1794 { "resend_headers", "Reemit PAT/PMT before writing the next packet",
1795 offsetof(MpegTSWrite, reemit_pat_pmt), AV_OPT_TYPE_INT,
1796 { .i64 = 0 }, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
1797 { "mpegts_copyts", "don't offset dts/pts",
1798 offsetof(MpegTSWrite, copyts), AV_OPT_TYPE_BOOL,
1799 { .i64 = -1 }, -1, 1, AV_OPT_FLAG_ENCODING_PARAM },
1800 { "tables_version", "set PAT, PMT and SDT version",
1801 offsetof(MpegTSWrite, tables_version), AV_OPT_TYPE_INT,
1802 { .i64 = 0 }, 0, 31, AV_OPT_FLAG_ENCODING_PARAM },
1803 { "omit_video_pes_length", "Omit the PES packet length for video packets",
1804 offsetof(MpegTSWrite, omit_video_pes_length), AV_OPT_TYPE_BOOL,
1805 { .i64 = 1 }, 0, 1, AV_OPT_FLAG_ENCODING_PARAM },
1806 { "pcr_period", "PCR retransmission time",
1807 offsetof(MpegTSWrite, pcr_period), AV_OPT_TYPE_INT,
1808 { .i64 = PCR_RETRANS_TIME }, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
1809 { "pat_period", "PAT/PMT retransmission time limit in seconds",
1810 offsetof(MpegTSWrite, pat_period), AV_OPT_TYPE_DOUBLE,
1811 { .dbl = INT_MAX }, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
1812 { "sdt_period", "SDT retransmission time limit in seconds",
1813 offsetof(MpegTSWrite, sdt_period), AV_OPT_TYPE_DOUBLE,
1814 { .dbl = INT_MAX }, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
1818 static const AVClass mpegts_muxer_class = {
1819 .class_name = "MPEGTS muxer",
1820 .item_name = av_default_item_name,
1822 .version = LIBAVUTIL_VERSION_INT,
1825 AVOutputFormat ff_mpegts_muxer = {
1827 .long_name = NULL_IF_CONFIG_SMALL("MPEG-TS (MPEG-2 Transport Stream)"),
1828 .mime_type = "video/MP2T",
1829 .extensions = "ts,m2t,m2ts,mts",
1830 .priv_data_size = sizeof(MpegTSWrite),
1831 .audio_codec = AV_CODEC_ID_MP2,
1832 .video_codec = AV_CODEC_ID_MPEG2VIDEO,
1833 .write_header = mpegts_write_header,
1834 .write_packet = mpegts_write_packet,
1835 .write_trailer = mpegts_write_end,
1836 .flags = AVFMT_ALLOW_FLUSH | AVFMT_VARIABLE_FPS,
1837 .priv_class = &mpegts_muxer_class,