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;
235 static void mpegts_write_pat(AVFormatContext *s)
237 MpegTSWrite *ts = s->priv_data;
238 MpegTSService *service;
239 uint8_t data[SECTION_LENGTH], *q;
243 for (i = 0; i < ts->nb_services; i++) {
244 service = ts->services[i];
245 put16(&q, service->sid);
246 put16(&q, 0xe000 | service->pmt.pid);
248 mpegts_write_section1(&ts->pat, PAT_TID, ts->tsid, ts->tables_version, 0, 0,
252 static int mpegts_write_pmt(AVFormatContext *s, MpegTSService *service)
254 MpegTSWrite *ts = s->priv_data;
255 uint8_t data[SECTION_LENGTH], *q, *desc_length_ptr, *program_info_length_ptr;
256 int val, stream_type, i, err = 0;
259 put16(&q, 0xe000 | service->pcr_pid);
261 program_info_length_ptr = q;
262 q += 2; /* patched after */
264 /* put program info here */
266 val = 0xf000 | (q - program_info_length_ptr - 2);
267 program_info_length_ptr[0] = val >> 8;
268 program_info_length_ptr[1] = val;
270 for (i = 0; i < s->nb_streams; i++) {
271 AVStream *st = s->streams[i];
272 MpegTSWriteStream *ts_st = st->priv_data;
273 AVDictionaryEntry *lang = av_dict_get(st->metadata, "language", NULL, 0);
275 if (q - data > SECTION_LENGTH - 32) {
279 switch (st->codec->codec_id) {
280 case AV_CODEC_ID_MPEG1VIDEO:
281 case AV_CODEC_ID_MPEG2VIDEO:
282 stream_type = STREAM_TYPE_VIDEO_MPEG2;
284 case AV_CODEC_ID_MPEG4:
285 stream_type = STREAM_TYPE_VIDEO_MPEG4;
287 case AV_CODEC_ID_H264:
288 stream_type = STREAM_TYPE_VIDEO_H264;
290 case AV_CODEC_ID_HEVC:
291 stream_type = STREAM_TYPE_VIDEO_HEVC;
293 case AV_CODEC_ID_CAVS:
294 stream_type = STREAM_TYPE_VIDEO_CAVS;
296 case AV_CODEC_ID_DIRAC:
297 stream_type = STREAM_TYPE_VIDEO_DIRAC;
299 case AV_CODEC_ID_MP2:
300 case AV_CODEC_ID_MP3:
301 stream_type = STREAM_TYPE_AUDIO_MPEG1;
303 case AV_CODEC_ID_AAC:
304 stream_type = (ts->flags & MPEGTS_FLAG_AAC_LATM)
305 ? STREAM_TYPE_AUDIO_AAC_LATM
306 : STREAM_TYPE_AUDIO_AAC;
308 case AV_CODEC_ID_AAC_LATM:
309 stream_type = STREAM_TYPE_AUDIO_AAC_LATM;
311 case AV_CODEC_ID_AC3:
312 stream_type = STREAM_TYPE_AUDIO_AC3;
314 case AV_CODEC_ID_DTS:
315 stream_type = STREAM_TYPE_AUDIO_DTS;
317 case AV_CODEC_ID_TRUEHD:
318 stream_type = STREAM_TYPE_AUDIO_TRUEHD;
320 case AV_CODEC_ID_OPUS:
321 stream_type = STREAM_TYPE_PRIVATE_DATA;
324 stream_type = STREAM_TYPE_PRIVATE_DATA;
329 put16(&q, 0xe000 | ts_st->pid);
331 q += 2; /* patched after */
333 /* write optional descriptors here */
334 switch (st->codec->codec_type) {
335 case AVMEDIA_TYPE_AUDIO:
336 if (st->codec->codec_id==AV_CODEC_ID_EAC3) {
337 *q++=0x7a; // EAC3 descriptor see A038 DVB SI
338 *q++=1; // 1 byte, all flags sets to 0
339 *q++=0; // omit all fields...
341 if (st->codec->codec_id==AV_CODEC_ID_S302M) {
342 *q++ = 0x05; /* MPEG-2 registration descriptor*/
349 if (st->codec->codec_id==AV_CODEC_ID_OPUS) {
350 /* 6 bytes registration descriptor, 4 bytes Opus audio descriptor */
351 if (q - data > SECTION_LENGTH - 6 - 4) {
356 *q++ = 0x05; /* MPEG-2 registration descriptor*/
363 *q++ = 0x7f; /* DVB extension descriptor */
367 if (st->codec->extradata && st->codec->extradata_size >= 19) {
368 if (st->codec->extradata[18] == 0 && st->codec->channels <= 2) {
369 /* RTP mapping family */
370 *q++ = st->codec->channels;
371 } else if (st->codec->extradata[18] == 1 && st->codec->channels <= 8 &&
372 st->codec->extradata_size >= 21 + st->codec->channels) {
373 static const uint8_t coupled_stream_counts[9] = {
374 1, 0, 1, 1, 2, 2, 2, 3, 3
376 static const uint8_t channel_map_a[8][8] = {
383 {0, 4, 1, 2, 3, 5, 6},
384 {0, 6, 1, 2, 3, 4, 5, 7},
386 static const uint8_t channel_map_b[8][8] = {
393 {0, 1, 2, 3, 4, 5, 6},
394 {0, 1, 2, 3, 4, 5, 6, 7},
396 /* Vorbis mapping family */
398 if (st->codec->extradata[19] == st->codec->channels - coupled_stream_counts[st->codec->channels] &&
399 st->codec->extradata[20] == coupled_stream_counts[st->codec->channels] &&
400 memcmp(&st->codec->extradata[21], channel_map_a[st->codec->channels], st->codec->channels) == 0) {
401 *q++ = st->codec->channels;
402 } else if (st->codec->channels >= 2 && st->codec->extradata[19] == st->codec->channels &&
403 st->codec->extradata[20] == 0 &&
404 memcmp(&st->codec->extradata[21], channel_map_b[st->codec->channels], st->codec->channels) == 0) {
405 *q++ = st->codec->channels | 0x80;
407 /* Unsupported, could write an extended descriptor here */
408 av_log(s, AV_LOG_ERROR, "Unsupported Opus Vorbis-style channel mapping");
413 av_log(s, AV_LOG_ERROR, "Unsupported Opus channel mapping for family %d", st->codec->extradata[18]);
416 } else if (st->codec->channels <= 2) {
417 /* Assume RTP mapping family */
418 *q++ = st->codec->channels;
421 av_log(s, AV_LOG_ERROR, "Unsupported Opus channel mapping");
428 char *next = lang->value;
431 *q++ = 0x0a; /* ISO 639 language descriptor */
435 for (p = lang->value; next && *len_ptr < 255 / 4 * 4; p = next + 1) {
436 if (q - data > SECTION_LENGTH - 4) {
440 next = strchr(p, ',');
441 if (strlen(p) != 3 && (!next || next != p + 3))
442 continue; /* not a 3-letter code */
448 if (st->disposition & AV_DISPOSITION_CLEAN_EFFECTS)
450 else if (st->disposition & AV_DISPOSITION_HEARING_IMPAIRED)
452 else if (st->disposition & AV_DISPOSITION_VISUAL_IMPAIRED)
455 *q++ = 0; /* undefined type */
461 q -= 2; /* no language codes were written */
464 case AVMEDIA_TYPE_SUBTITLE:
466 const char default_language[] = "und";
467 const char *language = lang && strlen(lang->value) >= 3 ? lang->value : default_language;
469 if (st->codec->codec_id == AV_CODEC_ID_DVB_SUBTITLE) {
471 int extradata_copied = 0;
473 *q++ = 0x59; /* subtitling_descriptor */
476 while (strlen(language) >= 3) {
477 if (sizeof(data) - (q - data) < 8) { /* 8 bytes per DVB subtitle substream data */
485 if (*language != '\0')
488 if (st->codec->extradata_size - extradata_copied >= 5) {
489 *q++ = st->codec->extradata[extradata_copied + 4]; /* subtitling_type */
490 memcpy(q, st->codec->extradata + extradata_copied, 4); /* composition_page_id and ancillary_page_id */
491 extradata_copied += 5;
495 * 0x10 - normal with no monitor aspect ratio criticality
496 * 0x20 - for the hard of hearing with no monitor aspect ratio criticality */
497 *q++ = (st->disposition & AV_DISPOSITION_HEARING_IMPAIRED) ? 0x20 : 0x10;
498 if ((st->codec->extradata_size == 4) && (extradata_copied == 0)) {
499 /* support of old 4-byte extradata format */
500 memcpy(q, st->codec->extradata, 4); /* composition_page_id and ancillary_page_id */
501 extradata_copied += 4;
504 put16(&q, 1); /* composition_page_id */
505 put16(&q, 1); /* ancillary_page_id */
510 *len_ptr = q - len_ptr - 1;
511 } else if (st->codec->codec_id == AV_CODEC_ID_DVB_TELETEXT) {
512 uint8_t *len_ptr = NULL;
513 int extradata_copied = 0;
515 /* The descriptor tag. teletext_descriptor */
519 while (strlen(language) >= 3 && q - data < sizeof(data) - 6) {
524 if (*language != '\0')
527 if (st->codec->extradata_size - 1 > extradata_copied) {
528 memcpy(q, st->codec->extradata + extradata_copied, 2);
529 extradata_copied += 2;
532 /* The Teletext descriptor:
533 * teletext_type: This 5-bit field indicates the type of Teletext page indicated. (0x01 Initial Teletext page)
534 * teletext_magazine_number: This is a 3-bit field which identifies the magazine number.
535 * teletext_page_number: This is an 8-bit field giving two 4-bit hex digits identifying the page number. */
541 *len_ptr = q - len_ptr - 1;
545 case AVMEDIA_TYPE_VIDEO:
546 if (stream_type == STREAM_TYPE_VIDEO_DIRAC) {
547 *q++ = 0x05; /*MPEG-2 registration descriptor*/
555 case AVMEDIA_TYPE_DATA:
556 if (st->codec->codec_id == AV_CODEC_ID_SMPTE_KLV) {
557 *q++ = 0x05; /* MPEG-2 registration descriptor */
567 val = 0xf000 | (q - desc_length_ptr - 2);
568 desc_length_ptr[0] = val >> 8;
569 desc_length_ptr[1] = val;
573 av_log(s, AV_LOG_ERROR,
574 "The PMT section cannot fit stream %d and all following streams.\n"
575 "Try reducing the number of languages in the audio streams "
576 "or the total number of streams.\n", i);
578 mpegts_write_section1(&service->pmt, PMT_TID, service->sid, ts->tables_version, 0, 0,
583 /* NOTE: !str is accepted for an empty string */
584 static void putstr8(uint8_t **q_ptr, const char *str)
600 static void mpegts_write_sdt(AVFormatContext *s)
602 MpegTSWrite *ts = s->priv_data;
603 MpegTSService *service;
604 uint8_t data[SECTION_LENGTH], *q, *desc_list_len_ptr, *desc_len_ptr;
605 int i, running_status, free_ca_mode, val;
610 for (i = 0; i < ts->nb_services; i++) {
611 service = ts->services[i];
612 put16(&q, service->sid);
613 *q++ = 0xfc | 0x00; /* currently no EIT info */
614 desc_list_len_ptr = q;
616 running_status = 4; /* running */
619 /* write only one descriptor for the service name and provider */
623 *q++ = ts->service_type;
624 putstr8(&q, service->provider_name);
625 putstr8(&q, service->name);
626 desc_len_ptr[0] = q - desc_len_ptr - 1;
628 /* fill descriptor length */
629 val = (running_status << 13) | (free_ca_mode << 12) |
630 (q - desc_list_len_ptr - 2);
631 desc_list_len_ptr[0] = val >> 8;
632 desc_list_len_ptr[1] = val;
634 mpegts_write_section1(&ts->sdt, SDT_TID, ts->tsid, ts->tables_version, 0, 0,
638 static MpegTSService *mpegts_add_service(MpegTSWrite *ts, int sid,
639 const char *provider_name,
642 MpegTSService *service;
644 service = av_mallocz(sizeof(MpegTSService));
647 service->pmt.pid = ts->pmt_start_pid + ts->nb_services;
649 service->pcr_pid = 0x1fff;
650 service->provider_name = av_strdup(provider_name);
651 service->name = av_strdup(name);
652 if (!service->provider_name || !service->name)
654 if (av_dynarray_add_nofree(&ts->services, &ts->nb_services, service) < 0)
659 av_freep(&service->provider_name);
660 av_freep(&service->name);
665 static int64_t get_pcr(const MpegTSWrite *ts, AVIOContext *pb)
667 return av_rescale(avio_tell(pb) + 11, 8 * PCR_TIME_BASE, ts->mux_rate) +
671 static void mpegts_prefix_m2ts_header(AVFormatContext *s)
673 MpegTSWrite *ts = s->priv_data;
675 int64_t pcr = get_pcr(s->priv_data, s->pb);
676 uint32_t tp_extra_header = pcr % 0x3fffffff;
677 tp_extra_header = AV_RB32(&tp_extra_header);
678 avio_write(s->pb, (unsigned char *) &tp_extra_header,
679 sizeof(tp_extra_header));
683 static void section_write_packet(MpegTSSection *s, const uint8_t *packet)
685 AVFormatContext *ctx = s->opaque;
686 mpegts_prefix_m2ts_header(ctx);
687 avio_write(ctx->pb, packet, TS_PACKET_SIZE);
690 static int mpegts_write_header(AVFormatContext *s)
692 MpegTSWrite *ts = s->priv_data;
693 MpegTSWriteStream *ts_st;
694 MpegTSService *service;
695 AVStream *st, *pcr_st = NULL;
696 AVDictionaryEntry *title, *provider;
698 const char *service_name;
699 const char *provider_name;
703 if (s->max_delay < 0) /* Not set by the caller */
706 // round up to a whole number of TS packets
707 ts->pes_payload_size = (ts->pes_payload_size + 14 + 183) / 184 * 184 - 14;
709 ts->tsid = ts->transport_stream_id;
710 ts->onid = ts->original_network_id;
711 /* allocate a single DVB service */
712 title = av_dict_get(s->metadata, "service_name", NULL, 0);
714 title = av_dict_get(s->metadata, "title", NULL, 0);
715 service_name = title ? title->value : DEFAULT_SERVICE_NAME;
716 provider = av_dict_get(s->metadata, "service_provider", NULL, 0);
717 provider_name = provider ? provider->value : DEFAULT_PROVIDER_NAME;
718 service = mpegts_add_service(ts, ts->service_id,
719 provider_name, service_name);
722 return AVERROR(ENOMEM);
724 service->pmt.write_packet = section_write_packet;
725 service->pmt.opaque = s;
726 service->pmt.cc = 15;
728 ts->pat.pid = PAT_PID;
729 /* Initialize at 15 so that it wraps and is equal to 0 for the
730 * first packet we write. */
732 ts->pat.write_packet = section_write_packet;
735 ts->sdt.pid = SDT_PID;
737 ts->sdt.write_packet = section_write_packet;
740 pids = av_malloc_array(s->nb_streams, sizeof(*pids));
742 ret = AVERROR(ENOMEM);
746 /* assign pids to each stream */
747 for (i = 0; i < s->nb_streams; i++) {
750 ts_st = av_mallocz(sizeof(MpegTSWriteStream));
752 ret = AVERROR(ENOMEM);
755 st->priv_data = ts_st;
757 ts_st->user_tb = st->time_base;
758 avpriv_set_pts_info(st, 33, 1, 90000);
760 ts_st->payload = av_mallocz(ts->pes_payload_size);
761 if (!ts_st->payload) {
762 ret = AVERROR(ENOMEM);
765 ts_st->service = service;
766 /* MPEG pid values < 16 are reserved. Applications which set st->id in
767 * this range are assigned a calculated pid. */
769 ts_st->pid = ts->start_pid + i;
770 } else if (st->id < 0x1FFF) {
773 av_log(s, AV_LOG_ERROR,
774 "Invalid stream id %d, must be less than 8191\n", st->id);
775 ret = AVERROR(EINVAL);
778 if (ts_st->pid == service->pmt.pid) {
779 av_log(s, AV_LOG_ERROR, "Duplicate stream id %d\n", ts_st->pid);
780 ret = AVERROR(EINVAL);
783 for (j = 0; j < i; j++) {
784 if (pids[j] == ts_st->pid) {
785 av_log(s, AV_LOG_ERROR, "Duplicate stream id %d\n", ts_st->pid);
786 ret = AVERROR(EINVAL);
790 pids[i] = ts_st->pid;
791 ts_st->payload_pts = AV_NOPTS_VALUE;
792 ts_st->payload_dts = AV_NOPTS_VALUE;
793 ts_st->first_pts_check = 1;
795 /* update PCR pid by using the first video stream */
796 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO &&
797 service->pcr_pid == 0x1fff) {
798 service->pcr_pid = ts_st->pid;
801 if (st->codec->codec_id == AV_CODEC_ID_AAC &&
802 st->codec->extradata_size > 0) {
804 ts_st->amux = avformat_alloc_context();
806 ret = AVERROR(ENOMEM);
809 ts_st->amux->oformat =
810 av_guess_format((ts->flags & MPEGTS_FLAG_AAC_LATM) ? "latm" : "adts",
812 if (!ts_st->amux->oformat) {
813 ret = AVERROR(EINVAL);
816 if (!(ast = avformat_new_stream(ts_st->amux, NULL))) {
817 ret = AVERROR(ENOMEM);
820 ret = avcodec_copy_context(ast->codec, st->codec);
823 ast->time_base = st->time_base;
824 ret = avformat_write_header(ts_st->amux, NULL);
832 /* if no video stream, use the first stream as PCR */
833 if (service->pcr_pid == 0x1fff && s->nb_streams > 0) {
834 pcr_st = s->streams[0];
835 ts_st = pcr_st->priv_data;
836 service->pcr_pid = ts_st->pid;
838 ts_st = pcr_st->priv_data;
840 if (ts->mux_rate > 1) {
841 service->pcr_packet_period = (ts->mux_rate * ts->pcr_period) /
842 (TS_PACKET_SIZE * 8 * 1000);
843 ts->sdt_packet_period = (ts->mux_rate * SDT_RETRANS_TIME) /
844 (TS_PACKET_SIZE * 8 * 1000);
845 ts->pat_packet_period = (ts->mux_rate * PAT_RETRANS_TIME) /
846 (TS_PACKET_SIZE * 8 * 1000);
849 ts->first_pcr = av_rescale(s->max_delay, PCR_TIME_BASE, AV_TIME_BASE);
851 /* Arbitrary values, PAT/PMT will also be written on video key frames */
852 ts->sdt_packet_period = 200;
853 ts->pat_packet_period = 40;
854 if (pcr_st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
855 if (!pcr_st->codec->frame_size) {
856 av_log(s, AV_LOG_WARNING, "frame size not set\n");
857 service->pcr_packet_period =
858 pcr_st->codec->sample_rate / (10 * 512);
860 service->pcr_packet_period =
861 pcr_st->codec->sample_rate / (10 * pcr_st->codec->frame_size);
864 // max delta PCR 0.1s
865 // TODO: should be avg_frame_rate
866 service->pcr_packet_period =
867 ts_st->user_tb.den / (10 * ts_st->user_tb.num);
869 if (!service->pcr_packet_period)
870 service->pcr_packet_period = 1;
873 ts->last_pat_ts = AV_NOPTS_VALUE;
874 ts->last_sdt_ts = AV_NOPTS_VALUE;
875 // The user specified a period, use only it
876 if (ts->pat_period < INT_MAX/2) {
877 ts->pat_packet_period = INT_MAX;
879 if (ts->sdt_period < INT_MAX/2) {
880 ts->sdt_packet_period = INT_MAX;
883 // output a PCR as soon as possible
884 service->pcr_packet_count = service->pcr_packet_period;
885 ts->pat_packet_count = ts->pat_packet_period - 1;
886 ts->sdt_packet_count = ts->sdt_packet_period - 1;
888 if (ts->mux_rate == 1)
889 av_log(s, AV_LOG_VERBOSE, "muxrate VBR, ");
891 av_log(s, AV_LOG_VERBOSE, "muxrate %d, ", ts->mux_rate);
892 av_log(s, AV_LOG_VERBOSE,
893 "pcr every %d pkts, sdt every %d, pat/pmt every %d pkts\n",
894 service->pcr_packet_period,
895 ts->sdt_packet_period, ts->pat_packet_period);
897 if (ts->m2ts_mode == -1) {
898 if (av_match_ext(s->filename, "m2ts")) {
909 for (i = 0; i < s->nb_streams; i++) {
911 ts_st = st->priv_data;
913 av_freep(&ts_st->payload);
915 avformat_free_context(ts_st->amux);
919 av_freep(&st->priv_data);
922 for (i = 0; i < ts->nb_services; i++) {
923 service = ts->services[i];
924 av_freep(&service->provider_name);
925 av_freep(&service->name);
928 av_freep(&ts->services);
932 /* send SDT, PAT and PMT tables regulary */
933 static void retransmit_si_info(AVFormatContext *s, int force_pat, int64_t dts)
935 MpegTSWrite *ts = s->priv_data;
938 if (++ts->sdt_packet_count == ts->sdt_packet_period ||
939 (dts != AV_NOPTS_VALUE && ts->last_sdt_ts == AV_NOPTS_VALUE) ||
940 (dts != AV_NOPTS_VALUE && dts - ts->last_sdt_ts >= ts->sdt_period*90000.0)
942 ts->sdt_packet_count = 0;
943 if (dts != AV_NOPTS_VALUE)
944 ts->last_sdt_ts = FFMAX(dts, ts->last_sdt_ts);
947 if (++ts->pat_packet_count == ts->pat_packet_period ||
948 (dts != AV_NOPTS_VALUE && ts->last_pat_ts == AV_NOPTS_VALUE) ||
949 (dts != AV_NOPTS_VALUE && dts - ts->last_pat_ts >= ts->pat_period*90000.0) ||
951 ts->pat_packet_count = 0;
952 if (dts != AV_NOPTS_VALUE)
953 ts->last_pat_ts = FFMAX(dts, ts->last_pat_ts);
955 for (i = 0; i < ts->nb_services; i++)
956 mpegts_write_pmt(s, ts->services[i]);
960 static int write_pcr_bits(uint8_t *buf, int64_t pcr)
962 int64_t pcr_low = pcr % 300, pcr_high = pcr / 300;
964 *buf++ = pcr_high >> 25;
965 *buf++ = pcr_high >> 17;
966 *buf++ = pcr_high >> 9;
967 *buf++ = pcr_high >> 1;
968 *buf++ = pcr_high << 7 | pcr_low >> 8 | 0x7e;
974 /* Write a single null transport stream packet */
975 static void mpegts_insert_null_packet(AVFormatContext *s)
978 uint8_t buf[TS_PACKET_SIZE];
985 memset(q, 0x0FF, TS_PACKET_SIZE - (q - buf));
986 mpegts_prefix_m2ts_header(s);
987 avio_write(s->pb, buf, TS_PACKET_SIZE);
990 /* Write a single transport stream packet with a PCR and no payload */
991 static void mpegts_insert_pcr_only(AVFormatContext *s, AVStream *st)
993 MpegTSWrite *ts = s->priv_data;
994 MpegTSWriteStream *ts_st = st->priv_data;
996 uint8_t buf[TS_PACKET_SIZE];
1000 *q++ = ts_st->pid >> 8;
1002 *q++ = 0x20 | ts_st->cc; /* Adaptation only */
1003 /* Continuity Count field does not increment (see 13818-1 section 2.4.3.3) */
1004 *q++ = TS_PACKET_SIZE - 5; /* Adaptation Field Length */
1005 *q++ = 0x10; /* Adaptation flags: PCR present */
1007 /* PCR coded into 6 bytes */
1008 q += write_pcr_bits(q, get_pcr(ts, s->pb));
1010 /* stuffing bytes */
1011 memset(q, 0xFF, TS_PACKET_SIZE - (q - buf));
1012 mpegts_prefix_m2ts_header(s);
1013 avio_write(s->pb, buf, TS_PACKET_SIZE);
1016 static void write_pts(uint8_t *q, int fourbits, int64_t pts)
1020 val = fourbits << 4 | (((pts >> 30) & 0x07) << 1) | 1;
1022 val = (((pts >> 15) & 0x7fff) << 1) | 1;
1025 val = (((pts) & 0x7fff) << 1) | 1;
1030 /* Set an adaptation field flag in an MPEG-TS packet*/
1031 static void set_af_flag(uint8_t *pkt, int flag)
1033 // expect at least one flag to set
1036 if ((pkt[3] & 0x20) == 0) {
1037 // no AF yet, set adaptation field flag
1039 // 1 byte length, no flags
1046 /* Extend the adaptation field by size bytes */
1047 static void extend_af(uint8_t *pkt, int size)
1049 // expect already existing adaptation field
1050 av_assert0(pkt[3] & 0x20);
1054 /* Get a pointer to MPEG-TS payload (right after TS packet header) */
1055 static uint8_t *get_ts_payload_start(uint8_t *pkt)
1058 return pkt + 5 + pkt[4];
1063 /* Add a PES header to the front of the payload, and segment into an integer
1064 * number of TS packets. The final TS packet is padded using an oversized
1065 * adaptation header to exactly fill the last TS packet.
1066 * NOTE: 'payload' contains a complete PES payload. */
1067 static void mpegts_write_pes(AVFormatContext *s, AVStream *st,
1068 const uint8_t *payload, int payload_size,
1069 int64_t pts, int64_t dts, int key)
1071 MpegTSWriteStream *ts_st = st->priv_data;
1072 MpegTSWrite *ts = s->priv_data;
1073 uint8_t buf[TS_PACKET_SIZE];
1075 int val, is_start, len, header_len, write_pcr, is_dvb_subtitle, is_dvb_teletext, flags;
1076 int afc_len, stuffing_len;
1077 int64_t pcr = -1; /* avoid warning */
1078 int64_t delay = av_rescale(s->max_delay, 90000, AV_TIME_BASE);
1079 int force_pat = st->codec->codec_type == AVMEDIA_TYPE_VIDEO && key && !ts_st->prev_payload_key;
1081 av_assert0(ts_st->payload != buf || st->codec->codec_type != AVMEDIA_TYPE_VIDEO);
1082 if (ts->flags & MPEGTS_FLAG_PAT_PMT_AT_FRAMES && st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
1087 while (payload_size > 0) {
1088 retransmit_si_info(s, force_pat, dts);
1092 if (ts_st->pid == ts_st->service->pcr_pid) {
1093 if (ts->mux_rate > 1 || is_start) // VBR pcr period is based on frames
1094 ts_st->service->pcr_packet_count++;
1095 if (ts_st->service->pcr_packet_count >=
1096 ts_st->service->pcr_packet_period) {
1097 ts_st->service->pcr_packet_count = 0;
1102 if (ts->mux_rate > 1 && dts != AV_NOPTS_VALUE &&
1103 (dts - get_pcr(ts, s->pb) / 300) > delay) {
1104 /* pcr insert gets priority over null packet insert */
1106 mpegts_insert_pcr_only(s, st);
1108 mpegts_insert_null_packet(s);
1109 /* recalculate write_pcr and possibly retransmit si_info */
1113 /* prepare packet header */
1116 val = ts_st->pid >> 8;
1121 ts_st->cc = ts_st->cc + 1 & 0xf;
1122 *q++ = 0x10 | ts_st->cc; // payload indicator + CC
1123 if (key && is_start && pts != AV_NOPTS_VALUE) {
1124 // set Random Access for key frames
1125 if (ts_st->pid == ts_st->service->pcr_pid)
1127 set_af_flag(buf, 0x40);
1128 q = get_ts_payload_start(buf);
1131 set_af_flag(buf, 0x10);
1132 q = get_ts_payload_start(buf);
1133 // add 11, pcr references the last byte of program clock reference base
1134 if (ts->mux_rate > 1)
1135 pcr = get_pcr(ts, s->pb);
1137 pcr = (dts - delay) * 300;
1138 if (dts != AV_NOPTS_VALUE && dts < pcr / 300)
1139 av_log(s, AV_LOG_WARNING, "dts < pcr, TS is invalid\n");
1140 extend_af(buf, write_pcr_bits(q, pcr));
1141 q = get_ts_payload_start(buf);
1144 int pes_extension = 0;
1145 int pes_header_stuffing_bytes = 0;
1146 /* write PES header */
1150 is_dvb_subtitle = 0;
1151 is_dvb_teletext = 0;
1152 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
1153 if (st->codec->codec_id == AV_CODEC_ID_DIRAC)
1157 } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
1158 (st->codec->codec_id == AV_CODEC_ID_MP2 ||
1159 st->codec->codec_id == AV_CODEC_ID_MP3 ||
1160 st->codec->codec_id == AV_CODEC_ID_AAC)) {
1162 } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
1163 st->codec->codec_id == AV_CODEC_ID_AC3 &&
1168 if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE) {
1169 if (st->codec->codec_id == AV_CODEC_ID_DVB_SUBTITLE) {
1170 is_dvb_subtitle = 1;
1171 } else if (st->codec->codec_id == AV_CODEC_ID_DVB_TELETEXT) {
1172 is_dvb_teletext = 1;
1178 if (pts != AV_NOPTS_VALUE) {
1182 if (dts != AV_NOPTS_VALUE && pts != AV_NOPTS_VALUE && dts != pts) {
1186 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO &&
1187 st->codec->codec_id == AV_CODEC_ID_DIRAC) {
1188 /* set PES_extension_flag */
1192 /* One byte for PES2 extension flag +
1193 * one byte for extension length +
1194 * one byte for extension id */
1197 /* for Blu-ray AC3 Audio the PES Extension flag should be as follow
1198 * otherwise it will not play sound on blu-ray
1200 if (ts->m2ts_mode &&
1201 st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
1202 st->codec->codec_id == AV_CODEC_ID_AC3) {
1203 /* set PES_extension_flag */
1208 if (is_dvb_teletext) {
1209 pes_header_stuffing_bytes = 0x24 - header_len;
1212 len = payload_size + header_len + 3;
1213 /* 3 extra bytes should be added to DVB subtitle payload: 0x20 0x00 at the beginning and trailing 0xff */
1214 if (is_dvb_subtitle) {
1220 if (ts->omit_video_pes_length && st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
1226 /* data alignment indicator is required for subtitle and data streams */
1227 if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE || st->codec->codec_type == AVMEDIA_TYPE_DATA)
1232 if (pts != AV_NOPTS_VALUE) {
1233 write_pts(q, flags >> 6, pts);
1236 if (dts != AV_NOPTS_VALUE && pts != AV_NOPTS_VALUE && dts != pts) {
1237 write_pts(q, 1, dts);
1240 if (pes_extension && st->codec->codec_id == AV_CODEC_ID_DIRAC) {
1241 flags = 0x01; /* set PES_extension_flag_2 */
1243 *q++ = 0x80 | 0x01; /* marker bit + extension length */
1244 /* Set the stream ID extension flag bit to 0 and
1245 * write the extended stream ID. */
1248 /* For Blu-ray AC3 Audio Setting extended flags */
1249 if (ts->m2ts_mode &&
1251 st->codec->codec_id == AV_CODEC_ID_AC3) {
1252 flags = 0x01; /* set PES_extension_flag_2 */
1254 *q++ = 0x80 | 0x01; /* marker bit + extension length */
1255 *q++ = 0x00 | 0x71; /* for AC3 Audio (specifically on blue-rays) */
1259 if (is_dvb_subtitle) {
1260 /* First two fields of DVB subtitles PES data:
1261 * data_identifier: for DVB subtitle streams shall be coded with the value 0x20
1262 * subtitle_stream_id: for DVB subtitle stream shall be identified by the value 0x00 */
1266 if (is_dvb_teletext) {
1267 memset(q, 0xff, pes_header_stuffing_bytes);
1268 q += pes_header_stuffing_bytes;
1273 header_len = q - buf;
1275 len = TS_PACKET_SIZE - header_len;
1276 if (len > payload_size)
1278 stuffing_len = TS_PACKET_SIZE - header_len - len;
1279 if (stuffing_len > 0) {
1280 /* add stuffing with AFC */
1281 if (buf[3] & 0x20) {
1282 /* stuffing already present: increase its size */
1283 afc_len = buf[4] + 1;
1284 memmove(buf + 4 + afc_len + stuffing_len,
1286 header_len - (4 + afc_len));
1287 buf[4] += stuffing_len;
1288 memset(buf + 4 + afc_len, 0xff, stuffing_len);
1291 memmove(buf + 4 + stuffing_len, buf + 4, header_len - 4);
1293 buf[4] = stuffing_len - 1;
1294 if (stuffing_len >= 2) {
1296 memset(buf + 6, 0xff, stuffing_len - 2);
1301 if (is_dvb_subtitle && payload_size == len) {
1302 memcpy(buf + TS_PACKET_SIZE - len, payload, len - 1);
1303 buf[TS_PACKET_SIZE - 1] = 0xff; /* end_of_PES_data_field_marker: an 8-bit field with fixed contents 0xff for DVB subtitle */
1305 memcpy(buf + TS_PACKET_SIZE - len, payload, len);
1309 payload_size -= len;
1310 mpegts_prefix_m2ts_header(s);
1311 avio_write(s->pb, buf, TS_PACKET_SIZE);
1313 ts_st->prev_payload_key = key;
1316 int ff_check_h264_startcode(AVFormatContext *s, const AVStream *st, const AVPacket *pkt)
1318 if (pkt->size < 5 || AV_RB32(pkt->data) != 0x0000001 && AV_RB24(pkt->data) != 0x000001) {
1319 if (!st->nb_frames) {
1320 av_log(s, AV_LOG_ERROR, "H.264 bitstream malformed, "
1321 "no startcode found, use the video bitstream filter 'h264_mp4toannexb' to fix it "
1322 "('-bsf:v h264_mp4toannexb' option with ffmpeg)\n");
1323 return AVERROR_INVALIDDATA;
1325 av_log(s, AV_LOG_WARNING, "H.264 bitstream error, startcode missing, size %d", pkt->size);
1326 if (pkt->size) av_log(s, AV_LOG_WARNING, " data %08X", AV_RB32(pkt->data));
1327 av_log(s, AV_LOG_WARNING, "\n");
1332 static int check_hevc_startcode(AVFormatContext *s, const AVStream *st, const AVPacket *pkt)
1334 if (pkt->size < 5 || AV_RB32(pkt->data) != 0x0000001 && AV_RB24(pkt->data) != 0x000001) {
1335 if (!st->nb_frames) {
1336 av_log(s, AV_LOG_ERROR, "HEVC bitstream malformed, no startcode found\n");
1337 return AVERROR_PATCHWELCOME;
1339 av_log(s, AV_LOG_WARNING, "HEVC bitstream error, startcode missing, size %d", pkt->size);
1340 if (pkt->size) av_log(s, AV_LOG_WARNING, " data %08X", AV_RB32(pkt->data));
1341 av_log(s, AV_LOG_WARNING, "\n");
1346 /* Based on GStreamer's gst-plugins-base/ext/ogg/gstoggstream.c
1347 * Released under the LGPL v2.1+, written by
1348 * Vincent Penquerc'h <vincent.penquerch@collabora.co.uk>
1350 static int opus_get_packet_samples(AVFormatContext *s, AVPacket *pkt)
1352 static const int durations[32] = {
1353 480, 960, 1920, 2880, /* Silk NB */
1354 480, 960, 1920, 2880, /* Silk MB */
1355 480, 960, 1920, 2880, /* Silk WB */
1356 480, 960, /* Hybrid SWB */
1357 480, 960, /* Hybrid FB */
1358 120, 240, 480, 960, /* CELT NB */
1359 120, 240, 480, 960, /* CELT NB */
1360 120, 240, 480, 960, /* CELT NB */
1361 120, 240, 480, 960, /* CELT NB */
1363 int toc, frame_duration, nframes, duration;
1370 frame_duration = durations[toc >> 3];
1384 nframes = pkt->data[1] & 63;
1388 duration = nframes * frame_duration;
1389 if (duration > 5760) {
1390 av_log(s, AV_LOG_WARNING,
1391 "Opus packet duration > 120 ms, invalid");
1398 static int mpegts_write_packet_internal(AVFormatContext *s, AVPacket *pkt)
1400 AVStream *st = s->streams[pkt->stream_index];
1401 int size = pkt->size;
1402 uint8_t *buf = pkt->data;
1403 uint8_t *data = NULL;
1404 MpegTSWrite *ts = s->priv_data;
1405 MpegTSWriteStream *ts_st = st->priv_data;
1406 const int64_t delay = av_rescale(s->max_delay, 90000, AV_TIME_BASE) * 2;
1407 int64_t dts = pkt->dts, pts = pkt->pts;
1408 int opus_samples = 0;
1410 if (ts->reemit_pat_pmt) {
1411 av_log(s, AV_LOG_WARNING,
1412 "resend_headers option is deprecated, use -mpegts_flags resend_headers\n");
1413 ts->reemit_pat_pmt = 0;
1414 ts->flags |= MPEGTS_FLAG_REEMIT_PAT_PMT;
1417 if (ts->flags & MPEGTS_FLAG_REEMIT_PAT_PMT) {
1418 ts->pat_packet_count = ts->pat_packet_period - 1;
1419 ts->sdt_packet_count = ts->sdt_packet_period - 1;
1420 ts->flags &= ~MPEGTS_FLAG_REEMIT_PAT_PMT;
1423 if (ts->copyts < 1) {
1424 if (pts != AV_NOPTS_VALUE)
1426 if (dts != AV_NOPTS_VALUE)
1430 if (ts_st->first_pts_check && pts == AV_NOPTS_VALUE) {
1431 av_log(s, AV_LOG_ERROR, "first pts value must be set\n");
1432 return AVERROR_INVALIDDATA;
1434 ts_st->first_pts_check = 0;
1436 if (st->codec->codec_id == AV_CODEC_ID_H264) {
1437 const uint8_t *p = buf, *buf_end = p + size;
1438 uint32_t state = -1;
1439 int extradd = (pkt->flags & AV_PKT_FLAG_KEY) ? st->codec->extradata_size : 0;
1440 int ret = ff_check_h264_startcode(s, st, pkt);
1444 if (extradd && AV_RB24(st->codec->extradata) > 1)
1448 p = avpriv_find_start_code(p, buf_end, &state);
1449 av_log(s, AV_LOG_TRACE, "nal %d\n", state & 0x1f);
1450 if ((state & 0x1f) == 7)
1452 } while (p < buf_end && (state & 0x1f) != 9 &&
1453 (state & 0x1f) != 5 && (state & 0x1f) != 1);
1455 if ((state & 0x1f) != 5)
1457 if ((state & 0x1f) != 9) { // AUD NAL
1458 data = av_malloc(pkt->size + 6 + extradd);
1460 return AVERROR(ENOMEM);
1461 memcpy(data + 6, st->codec->extradata, extradd);
1462 memcpy(data + 6 + extradd, pkt->data, pkt->size);
1463 AV_WB32(data, 0x00000001);
1465 data[5] = 0xf0; // any slice type (0xe) + rbsp stop one bit
1467 size = pkt->size + 6 + extradd;
1469 } else if (st->codec->codec_id == AV_CODEC_ID_AAC) {
1470 if (pkt->size < 2) {
1471 av_log(s, AV_LOG_ERROR, "AAC packet too short\n");
1472 return AVERROR_INVALIDDATA;
1474 if ((AV_RB16(pkt->data) & 0xfff0) != 0xfff0) {
1479 av_log(s, AV_LOG_ERROR, "AAC bitstream not in ADTS format "
1480 "and extradata missing\n");
1482 return AVERROR_INVALIDDATA;
1484 av_init_packet(&pkt2);
1485 pkt2.data = pkt->data;
1486 pkt2.size = pkt->size;
1487 av_assert0(pkt->dts != AV_NOPTS_VALUE);
1488 pkt2.dts = av_rescale_q(pkt->dts, st->time_base, ts_st->amux->streams[0]->time_base);
1490 ret = avio_open_dyn_buf(&ts_st->amux->pb);
1492 return AVERROR(ENOMEM);
1494 ret = av_write_frame(ts_st->amux, &pkt2);
1496 ffio_free_dyn_buf(&ts_st->amux->pb);
1499 size = avio_close_dyn_buf(ts_st->amux->pb, &data);
1500 ts_st->amux->pb = NULL;
1504 } else if (st->codec->codec_id == AV_CODEC_ID_HEVC) {
1505 int ret = check_hevc_startcode(s, st, pkt);
1508 } else if (st->codec->codec_id == AV_CODEC_ID_OPUS) {
1509 if (pkt->size < 2) {
1510 av_log(s, AV_LOG_ERROR, "Opus packet too short\n");
1511 return AVERROR_INVALIDDATA;
1514 /* Add Opus control header */
1515 if ((AV_RB16(pkt->data) >> 5) != 0x3ff) {
1518 opus_samples = opus_get_packet_samples(s, pkt);
1520 data = av_malloc(pkt->size + 2 + pkt->size / 255 + 1);
1522 return AVERROR(ENOMEM);
1524 /* TODO: Write trim if needed */
1531 data[i] = FFMIN(n, 255);
1536 av_assert0(2 + pkt->size / 255 + 1 == i);
1538 memcpy(data + i, pkt->data, pkt->size);
1540 size = pkt->size + 2 + pkt->size / 255 + 1;
1542 /* TODO: Can we get TS formatted data here? If so we will
1543 * need to count the samples of that too! */
1544 av_log(s, AV_LOG_WARNING, "Got MPEG-TS formatted Opus data, unhandled");
1548 if (pkt->dts != AV_NOPTS_VALUE) {
1550 for(i=0; i<s->nb_streams; i++) {
1551 AVStream *st2 = s->streams[i];
1552 MpegTSWriteStream *ts_st2 = st2->priv_data;
1553 if ( ts_st2->payload_size
1554 && (ts_st2->payload_dts == AV_NOPTS_VALUE || dts - ts_st2->payload_dts > delay/2)) {
1555 mpegts_write_pes(s, st2, ts_st2->payload, ts_st2->payload_size,
1556 ts_st2->payload_pts, ts_st2->payload_dts,
1557 ts_st2->payload_flags & AV_PKT_FLAG_KEY);
1558 ts_st2->payload_size = 0;
1563 if (ts_st->payload_size && (ts_st->payload_size + size > ts->pes_payload_size ||
1564 (dts != AV_NOPTS_VALUE && ts_st->payload_dts != AV_NOPTS_VALUE &&
1565 av_compare_ts(dts - ts_st->payload_dts, st->time_base,
1566 s->max_delay, AV_TIME_BASE_Q) >= 0) ||
1567 ts_st->opus_queued_samples + opus_samples >= 5760 /* 120ms */)) {
1568 mpegts_write_pes(s, st, ts_st->payload, ts_st->payload_size,
1569 ts_st->payload_pts, ts_st->payload_dts,
1570 ts_st->payload_flags & AV_PKT_FLAG_KEY);
1571 ts_st->payload_size = 0;
1572 ts_st->opus_queued_samples = 0;
1575 if (st->codec->codec_type != AVMEDIA_TYPE_AUDIO || size > ts->pes_payload_size) {
1576 av_assert0(!ts_st->payload_size);
1577 // for video and subtitle, write a single pes packet
1578 mpegts_write_pes(s, st, buf, size, pts, dts,
1579 pkt->flags & AV_PKT_FLAG_KEY);
1580 ts_st->opus_queued_samples = 0;
1585 if (!ts_st->payload_size) {
1586 ts_st->payload_pts = pts;
1587 ts_st->payload_dts = dts;
1588 ts_st->payload_flags = pkt->flags;
1591 memcpy(ts_st->payload + ts_st->payload_size, buf, size);
1592 ts_st->payload_size += size;
1593 ts_st->opus_queued_samples += opus_samples;
1600 static void mpegts_write_flush(AVFormatContext *s)
1604 /* flush current packets */
1605 for (i = 0; i < s->nb_streams; i++) {
1606 AVStream *st = s->streams[i];
1607 MpegTSWriteStream *ts_st = st->priv_data;
1608 if (ts_st->payload_size > 0) {
1609 mpegts_write_pes(s, st, ts_st->payload, ts_st->payload_size,
1610 ts_st->payload_pts, ts_st->payload_dts,
1611 ts_st->payload_flags & AV_PKT_FLAG_KEY);
1612 ts_st->payload_size = 0;
1613 ts_st->opus_queued_samples = 0;
1618 static int mpegts_write_packet(AVFormatContext *s, AVPacket *pkt)
1621 mpegts_write_flush(s);
1624 return mpegts_write_packet_internal(s, pkt);
1628 static int mpegts_write_end(AVFormatContext *s)
1630 MpegTSWrite *ts = s->priv_data;
1631 MpegTSService *service;
1635 mpegts_write_flush(s);
1637 for (i = 0; i < s->nb_streams; i++) {
1638 AVStream *st = s->streams[i];
1639 MpegTSWriteStream *ts_st = st->priv_data;
1640 av_freep(&ts_st->payload);
1642 avformat_free_context(ts_st->amux);
1647 for (i = 0; i < ts->nb_services; i++) {
1648 service = ts->services[i];
1649 av_freep(&service->provider_name);
1650 av_freep(&service->name);
1653 av_freep(&ts->services);
1658 static const AVOption options[] = {
1659 { "mpegts_transport_stream_id", "Set transport_stream_id field.",
1660 offsetof(MpegTSWrite, transport_stream_id), AV_OPT_TYPE_INT,
1661 { .i64 = 0x0001 }, 0x0001, 0xffff, AV_OPT_FLAG_ENCODING_PARAM },
1662 { "mpegts_original_network_id", "Set original_network_id field.",
1663 offsetof(MpegTSWrite, original_network_id), AV_OPT_TYPE_INT,
1664 { .i64 = 0x0001 }, 0x0001, 0xffff, AV_OPT_FLAG_ENCODING_PARAM },
1665 { "mpegts_service_id", "Set service_id field.",
1666 offsetof(MpegTSWrite, service_id), AV_OPT_TYPE_INT,
1667 { .i64 = 0x0001 }, 0x0001, 0xffff, AV_OPT_FLAG_ENCODING_PARAM },
1668 { "mpegts_service_type", "Set service_type field.",
1669 offsetof(MpegTSWrite, service_type), AV_OPT_TYPE_INT,
1670 { .i64 = 0x01 }, 0x01, 0xff, AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
1671 { "digital_tv", "Digital Television.",
1672 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_DIGITAL_TV }, 0x01, 0xff,
1673 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
1674 { "digital_radio", "Digital Radio.",
1675 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_DIGITAL_RADIO }, 0x01, 0xff,
1676 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
1677 { "teletext", "Teletext.",
1678 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_TELETEXT }, 0x01, 0xff,
1679 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
1680 { "advanced_codec_digital_radio", "Advanced Codec Digital Radio.",
1681 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_ADVANCED_CODEC_DIGITAL_RADIO }, 0x01, 0xff,
1682 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
1683 { "mpeg2_digital_hdtv", "MPEG2 Digital HDTV.",
1684 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_MPEG2_DIGITAL_HDTV }, 0x01, 0xff,
1685 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
1686 { "advanced_codec_digital_sdtv", "Advanced Codec Digital SDTV.",
1687 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_ADVANCED_CODEC_DIGITAL_SDTV }, 0x01, 0xff,
1688 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
1689 { "advanced_codec_digital_hdtv", "Advanced Codec Digital HDTV.",
1690 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_ADVANCED_CODEC_DIGITAL_HDTV }, 0x01, 0xff,
1691 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
1692 { "mpegts_pmt_start_pid", "Set the first pid of the PMT.",
1693 offsetof(MpegTSWrite, pmt_start_pid), AV_OPT_TYPE_INT,
1694 { .i64 = 0x1000 }, 0x0010, 0x1f00, AV_OPT_FLAG_ENCODING_PARAM },
1695 { "mpegts_start_pid", "Set the first pid.",
1696 offsetof(MpegTSWrite, start_pid), AV_OPT_TYPE_INT,
1697 { .i64 = 0x0100 }, 0x0020, 0x0f00, AV_OPT_FLAG_ENCODING_PARAM },
1698 { "mpegts_m2ts_mode", "Enable m2ts mode.",
1699 offsetof(MpegTSWrite, m2ts_mode), AV_OPT_TYPE_INT,
1700 { .i64 = -1 }, -1, 1, AV_OPT_FLAG_ENCODING_PARAM },
1702 offsetof(MpegTSWrite, mux_rate), AV_OPT_TYPE_INT,
1703 { .i64 = 1 }, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
1704 { "pes_payload_size", "Minimum PES packet payload in bytes",
1705 offsetof(MpegTSWrite, pes_payload_size), AV_OPT_TYPE_INT,
1706 { .i64 = DEFAULT_PES_PAYLOAD_SIZE }, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
1707 { "mpegts_flags", "MPEG-TS muxing flags",
1708 offsetof(MpegTSWrite, flags), AV_OPT_TYPE_FLAGS, { .i64 = 0 }, 0, INT_MAX,
1709 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_flags" },
1710 { "resend_headers", "Reemit PAT/PMT before writing the next packet",
1711 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_FLAG_REEMIT_PAT_PMT }, 0, INT_MAX,
1712 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_flags" },
1713 { "latm", "Use LATM packetization for AAC",
1714 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_FLAG_AAC_LATM }, 0, INT_MAX,
1715 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_flags" },
1716 { "pat_pmt_at_frames", "Reemit PAT and PMT at each video frame",
1717 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_FLAG_PAT_PMT_AT_FRAMES}, 0, INT_MAX,
1718 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_flags" },
1719 // backward compatibility
1720 { "resend_headers", "Reemit PAT/PMT before writing the next packet",
1721 offsetof(MpegTSWrite, reemit_pat_pmt), AV_OPT_TYPE_INT,
1722 { .i64 = 0 }, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
1723 { "mpegts_copyts", "don't offset dts/pts",
1724 offsetof(MpegTSWrite, copyts), AV_OPT_TYPE_INT,
1725 { .i64 = -1 }, -1, 1, AV_OPT_FLAG_ENCODING_PARAM },
1726 { "tables_version", "set PAT, PMT and SDT version",
1727 offsetof(MpegTSWrite, tables_version), AV_OPT_TYPE_INT,
1728 { .i64 = 0 }, 0, 31, AV_OPT_FLAG_ENCODING_PARAM },
1729 { "omit_video_pes_length", "Omit the PES packet length for video packets",
1730 offsetof(MpegTSWrite, omit_video_pes_length), AV_OPT_TYPE_INT,
1731 { .i64 = 1 }, 0, 1, AV_OPT_FLAG_ENCODING_PARAM },
1732 { "pcr_period", "PCR retransmission time",
1733 offsetof(MpegTSWrite, pcr_period), AV_OPT_TYPE_INT,
1734 { .i64 = PCR_RETRANS_TIME }, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
1735 { "pat_period", "PAT/PMT retransmission time limit in seconds",
1736 offsetof(MpegTSWrite, pat_period), AV_OPT_TYPE_DOUBLE,
1737 { .dbl = INT_MAX }, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
1738 { "sdt_period", "SDT retransmission time limit in seconds",
1739 offsetof(MpegTSWrite, sdt_period), AV_OPT_TYPE_DOUBLE,
1740 { .dbl = INT_MAX }, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
1744 static const AVClass mpegts_muxer_class = {
1745 .class_name = "MPEGTS muxer",
1746 .item_name = av_default_item_name,
1748 .version = LIBAVUTIL_VERSION_INT,
1751 AVOutputFormat ff_mpegts_muxer = {
1753 .long_name = NULL_IF_CONFIG_SMALL("MPEG-TS (MPEG-2 Transport Stream)"),
1754 .mime_type = "video/MP2T",
1755 .extensions = "ts,m2t,m2ts,mts",
1756 .priv_data_size = sizeof(MpegTSWrite),
1757 .audio_codec = AV_CODEC_ID_MP2,
1758 .video_codec = AV_CODEC_ID_MPEG2VIDEO,
1759 .write_header = mpegts_write_header,
1760 .write_packet = mpegts_write_packet,
1761 .write_trailer = mpegts_write_end,
1762 .flags = AVFMT_ALLOW_FLUSH | AVFMT_VARIABLE_FPS,
1763 .priv_class = &mpegts_muxer_class,