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/bswap.h"
23 #include "libavutil/crc.h"
24 #include "libavcodec/mpegvideo.h"
30 /* write DVB SI sections */
32 /*********************************************/
33 /* mpegts section writer */
35 typedef struct MpegTSSection {
38 void (*write_packet)(struct MpegTSSection *s, const uint8_t *packet);
42 typedef struct MpegTSService {
43 MpegTSSection pmt; /* MPEG2 pmt table context */
44 int sid; /* service ID */
49 int pcr_packet_period;
52 typedef struct MpegTSWrite {
53 MpegTSSection pat; /* MPEG2 pat table */
54 MpegTSSection sdt; /* MPEG2 sdt table context */
55 MpegTSService **services;
57 int sdt_packet_period;
59 int pat_packet_period;
64 int mux_rate; ///< set to 1 when VBR
67 /* NOTE: 4 bytes must be left at the end for the crc32 */
68 static void mpegts_write_section(MpegTSSection *s, uint8_t *buf, int len)
70 MpegTSWrite *ts = ((AVFormatContext*)s->opaque)->priv_data;
72 unsigned char packet[TS_PACKET_SIZE];
73 const unsigned char *buf_ptr;
75 int first, b, len1, left;
77 crc = av_bswap32(av_crc(av_crc_get_table(AV_CRC_32_IEEE), -1, buf, len - 4));
78 buf[len - 4] = (crc >> 24) & 0xff;
79 buf[len - 3] = (crc >> 16) & 0xff;
80 buf[len - 2] = (crc >> 8) & 0xff;
81 buf[len - 1] = (crc) & 0xff;
83 /* send each packet */
86 first = (buf == buf_ptr);
94 s->cc = (s->cc + 1) & 0xf;
97 *q++ = 0; /* 0 offset */
98 len1 = TS_PACKET_SIZE - (q - packet);
101 memcpy(q, buf_ptr, len1);
103 /* add known padding data */
104 left = TS_PACKET_SIZE - (q - packet);
106 memset(q, 0xff, left);
108 s->write_packet(s, packet);
113 ts->cur_pcr += TS_PACKET_SIZE*8*90000LL/ts->mux_rate;
117 static inline void put16(uint8_t **q_ptr, int val)
126 static int mpegts_write_section1(MpegTSSection *s, int tid, int id,
127 int version, int sec_num, int last_sec_num,
128 uint8_t *buf, int len)
130 uint8_t section[1024], *q;
131 unsigned int tot_len;
133 tot_len = 3 + 5 + len + 4;
134 /* check if not too big */
140 put16(&q, 0xb000 | (len + 5 + 4)); /* 5 byte header + 4 byte CRC */
142 *q++ = 0xc1 | (version << 1); /* current_next_indicator = 1 */
147 mpegts_write_section(s, section, tot_len);
151 /*********************************************/
154 #define DEFAULT_PMT_START_PID 0x1000
155 #define DEFAULT_START_PID 0x0100
156 #define DEFAULT_PROVIDER_NAME "FFmpeg"
157 #define DEFAULT_SERVICE_NAME "Service01"
159 /* default network id, transport stream and service identifiers */
160 #define DEFAULT_ONID 0x0001
161 #define DEFAULT_TSID 0x0001
162 #define DEFAULT_SID 0x0001
164 /* a PES packet header is generated every DEFAULT_PES_HEADER_FREQ packets */
165 #define DEFAULT_PES_HEADER_FREQ 16
166 #define DEFAULT_PES_PAYLOAD_SIZE ((DEFAULT_PES_HEADER_FREQ - 1) * 184 + 170)
168 /* we retransmit the SI info at this rate */
169 #define SDT_RETRANS_TIME 500
170 #define PAT_RETRANS_TIME 100
171 #define PCR_RETRANS_TIME 20
173 typedef struct MpegTSWriteStream {
174 struct MpegTSService *service;
175 int pid; /* stream associated pid */
178 int first_pts_check; ///< first pts check needed
181 uint8_t payload[DEFAULT_PES_PAYLOAD_SIZE];
185 static void mpegts_write_pat(AVFormatContext *s)
187 MpegTSWrite *ts = s->priv_data;
188 MpegTSService *service;
189 uint8_t data[1012], *q;
193 for(i = 0; i < ts->nb_services; i++) {
194 service = ts->services[i];
195 put16(&q, service->sid);
196 put16(&q, 0xe000 | service->pmt.pid);
198 mpegts_write_section1(&ts->pat, PAT_TID, ts->tsid, 0, 0, 0,
202 static void mpegts_write_pmt(AVFormatContext *s, MpegTSService *service)
204 // MpegTSWrite *ts = s->priv_data;
205 uint8_t data[1012], *q, *desc_length_ptr, *program_info_length_ptr;
206 int val, stream_type, i;
209 put16(&q, 0xe000 | service->pcr_pid);
211 program_info_length_ptr = q;
212 q += 2; /* patched after */
214 /* put program info here */
216 val = 0xf000 | (q - program_info_length_ptr - 2);
217 program_info_length_ptr[0] = val >> 8;
218 program_info_length_ptr[1] = val;
220 for(i = 0; i < s->nb_streams; i++) {
221 AVStream *st = s->streams[i];
222 MpegTSWriteStream *ts_st = st->priv_data;
223 AVMetadataTag *lang = av_metadata_get(st->metadata, "language", NULL,0);
224 switch(st->codec->codec_id) {
225 case CODEC_ID_MPEG1VIDEO:
226 case CODEC_ID_MPEG2VIDEO:
227 stream_type = STREAM_TYPE_VIDEO_MPEG2;
230 stream_type = STREAM_TYPE_VIDEO_MPEG4;
233 stream_type = STREAM_TYPE_VIDEO_H264;
236 stream_type = STREAM_TYPE_VIDEO_DIRAC;
240 stream_type = STREAM_TYPE_AUDIO_MPEG1;
243 stream_type = STREAM_TYPE_AUDIO_AAC;
246 stream_type = STREAM_TYPE_AUDIO_AC3;
249 stream_type = STREAM_TYPE_PRIVATE_DATA;
253 put16(&q, 0xe000 | ts_st->pid);
255 q += 2; /* patched after */
257 /* write optional descriptors here */
258 switch(st->codec->codec_type) {
259 case AVMEDIA_TYPE_AUDIO:
260 if (lang && strlen(lang->value) == 3) {
261 *q++ = 0x0a; /* ISO 639 language descriptor */
263 *q++ = lang->value[0];
264 *q++ = lang->value[1];
265 *q++ = lang->value[2];
266 *q++ = 0; /* undefined type */
269 case AVMEDIA_TYPE_SUBTITLE:
271 const char *language;
272 language = lang && strlen(lang->value)==3 ? lang->value : "eng";
278 *q++ = 0x10; /* normal subtitles (0x20 = if hearing pb) */
279 put16(&q, 1); /* page id */
280 put16(&q, 1); /* ancillary page id */
283 case AVMEDIA_TYPE_VIDEO:
284 if (stream_type == STREAM_TYPE_VIDEO_DIRAC) {
285 *q++ = 0x05; /*MPEG-2 registration descriptor*/
295 val = 0xf000 | (q - desc_length_ptr - 2);
296 desc_length_ptr[0] = val >> 8;
297 desc_length_ptr[1] = val;
299 mpegts_write_section1(&service->pmt, PMT_TID, service->sid, 0, 0, 0,
303 /* NOTE: str == NULL is accepted for an empty string */
304 static void putstr8(uint8_t **q_ptr, const char *str)
320 static void mpegts_write_sdt(AVFormatContext *s)
322 MpegTSWrite *ts = s->priv_data;
323 MpegTSService *service;
324 uint8_t data[1012], *q, *desc_list_len_ptr, *desc_len_ptr;
325 int i, running_status, free_ca_mode, val;
330 for(i = 0; i < ts->nb_services; i++) {
331 service = ts->services[i];
332 put16(&q, service->sid);
333 *q++ = 0xfc | 0x00; /* currently no EIT info */
334 desc_list_len_ptr = q;
336 running_status = 4; /* running */
339 /* write only one descriptor for the service name and provider */
343 *q++ = 0x01; /* digital television service */
344 putstr8(&q, service->provider_name);
345 putstr8(&q, service->name);
346 desc_len_ptr[0] = q - desc_len_ptr - 1;
348 /* fill descriptor length */
349 val = (running_status << 13) | (free_ca_mode << 12) |
350 (q - desc_list_len_ptr - 2);
351 desc_list_len_ptr[0] = val >> 8;
352 desc_list_len_ptr[1] = val;
354 mpegts_write_section1(&ts->sdt, SDT_TID, ts->tsid, 0, 0, 0,
358 static MpegTSService *mpegts_add_service(MpegTSWrite *ts,
360 const char *provider_name,
363 MpegTSService *service;
365 service = av_mallocz(sizeof(MpegTSService));
368 service->pmt.pid = DEFAULT_PMT_START_PID + ts->nb_services - 1;
370 service->provider_name = av_strdup(provider_name);
371 service->name = av_strdup(name);
372 service->pcr_pid = 0x1fff;
373 dynarray_add(&ts->services, &ts->nb_services, service);
377 static void section_write_packet(MpegTSSection *s, const uint8_t *packet)
379 AVFormatContext *ctx = s->opaque;
380 put_buffer(ctx->pb, packet, TS_PACKET_SIZE);
383 static int mpegts_write_header(AVFormatContext *s)
385 MpegTSWrite *ts = s->priv_data;
386 MpegTSWriteStream *ts_st;
387 MpegTSService *service;
388 AVStream *st, *pcr_st = NULL;
389 AVMetadataTag *title;
391 const char *service_name;
394 ts->tsid = DEFAULT_TSID;
395 ts->onid = DEFAULT_ONID;
396 /* allocate a single DVB service */
397 title = av_metadata_get(s->metadata, "title", NULL, 0);
398 service_name = title ? title->value : DEFAULT_SERVICE_NAME;
399 service = mpegts_add_service(ts, DEFAULT_SID,
400 DEFAULT_PROVIDER_NAME, service_name);
401 service->pmt.write_packet = section_write_packet;
402 service->pmt.opaque = s;
403 service->pmt.cc = 15;
405 ts->pat.pid = PAT_PID;
406 ts->pat.cc = 15; // Initialize at 15 so that it wraps and be equal to 0 for the first packet we write
407 ts->pat.write_packet = section_write_packet;
410 ts->sdt.pid = SDT_PID;
412 ts->sdt.write_packet = section_write_packet;
415 pids = av_malloc(s->nb_streams * sizeof(*pids));
417 return AVERROR(ENOMEM);
419 /* assign pids to each stream */
420 for(i = 0;i < s->nb_streams; i++) {
422 ts_st = av_mallocz(sizeof(MpegTSWriteStream));
425 st->priv_data = ts_st;
426 ts_st->service = service;
427 /* MPEG pid values < 16 are reserved. Applications which set st->id in
428 * this range are assigned a calculated pid. */
430 ts_st->pid = DEFAULT_START_PID + i;
431 } else if (st->id < 0x1FFF) {
434 av_log(s, AV_LOG_ERROR, "Invalid stream id %d, must be less than 8191\n", st->id);
437 if (ts_st->pid == service->pmt.pid) {
438 av_log(s, AV_LOG_ERROR, "Duplicate stream id %d\n", ts_st->pid);
441 for (j = 0; j < i; j++)
442 if (pids[j] == ts_st->pid) {
443 av_log(s, AV_LOG_ERROR, "Duplicate stream id %d\n", ts_st->pid);
446 pids[i] = ts_st->pid;
447 ts_st->payload_pts = AV_NOPTS_VALUE;
448 ts_st->payload_dts = AV_NOPTS_VALUE;
449 ts_st->first_pts_check = 1;
451 /* update PCR pid by using the first video stream */
452 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO &&
453 service->pcr_pid == 0x1fff) {
454 service->pcr_pid = ts_st->pid;
457 if (st->codec->codec_id == CODEC_ID_AAC &&
458 st->codec->extradata_size > 0) {
459 ts_st->adts = av_mallocz(sizeof(*ts_st->adts));
461 return AVERROR(ENOMEM);
462 if (ff_adts_decode_extradata(s, ts_st->adts, st->codec->extradata,
463 st->codec->extradata_size) < 0)
470 /* if no video stream, use the first stream as PCR */
471 if (service->pcr_pid == 0x1fff && s->nb_streams > 0) {
472 pcr_st = s->streams[0];
473 ts_st = pcr_st->priv_data;
474 service->pcr_pid = ts_st->pid;
477 ts->mux_rate = s->mux_rate ? s->mux_rate : 1;
479 if (ts->mux_rate > 1) {
480 service->pcr_packet_period = (ts->mux_rate * PCR_RETRANS_TIME) /
481 (TS_PACKET_SIZE * 8 * 1000);
482 ts->sdt_packet_period = (ts->mux_rate * SDT_RETRANS_TIME) /
483 (TS_PACKET_SIZE * 8 * 1000);
484 ts->pat_packet_period = (ts->mux_rate * PAT_RETRANS_TIME) /
485 (TS_PACKET_SIZE * 8 * 1000);
487 ts->cur_pcr = av_rescale(s->max_delay, 90000, AV_TIME_BASE);
489 /* Arbitrary values, PAT/PMT could be written on key frames */
490 ts->sdt_packet_period = 200;
491 ts->pat_packet_period = 40;
492 if (pcr_st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
493 if (!pcr_st->codec->frame_size) {
494 av_log(s, AV_LOG_WARNING, "frame size not set\n");
495 service->pcr_packet_period =
496 pcr_st->codec->sample_rate/(10*512);
498 service->pcr_packet_period =
499 pcr_st->codec->sample_rate/(10*pcr_st->codec->frame_size);
502 // max delta PCR 0.1s
503 service->pcr_packet_period =
504 pcr_st->codec->time_base.den/(10*pcr_st->codec->time_base.num);
508 // output a PCR as soon as possible
509 service->pcr_packet_count = service->pcr_packet_period;
510 ts->pat_packet_count = ts->pat_packet_period-1;
511 ts->sdt_packet_count = ts->sdt_packet_period-1;
513 if (ts->mux_rate == 1)
514 av_log(s, AV_LOG_INFO, "muxrate VBR, ");
516 av_log(s, AV_LOG_INFO, "muxrate %d, ", ts->mux_rate);
517 av_log(s, AV_LOG_INFO, "pcr every %d pkts, "
518 "sdt every %d, pat/pmt every %d pkts\n",
519 service->pcr_packet_period,
520 ts->sdt_packet_period, ts->pat_packet_period);
522 put_flush_packet(s->pb);
528 for(i = 0;i < s->nb_streams; i++) {
530 av_free(st->priv_data);
535 /* send SDT, PAT and PMT tables regulary */
536 static void retransmit_si_info(AVFormatContext *s)
538 MpegTSWrite *ts = s->priv_data;
541 if (++ts->sdt_packet_count == ts->sdt_packet_period) {
542 ts->sdt_packet_count = 0;
545 if (++ts->pat_packet_count == ts->pat_packet_period) {
546 ts->pat_packet_count = 0;
548 for(i = 0; i < ts->nb_services; i++) {
549 mpegts_write_pmt(s, ts->services[i]);
554 /* Write a single null transport stream packet */
555 static void mpegts_insert_null_packet(AVFormatContext *s)
557 MpegTSWrite *ts = s->priv_data;
559 uint8_t buf[TS_PACKET_SIZE];
566 memset(q, 0x0FF, TS_PACKET_SIZE - (q - buf));
567 put_buffer(s->pb, buf, TS_PACKET_SIZE);
568 ts->cur_pcr += TS_PACKET_SIZE*8*90000LL/ts->mux_rate;
571 /* Write a single transport stream packet with a PCR and no payload */
572 static void mpegts_insert_pcr_only(AVFormatContext *s, AVStream *st)
574 MpegTSWrite *ts = s->priv_data;
575 MpegTSWriteStream *ts_st = st->priv_data;
577 uint64_t pcr = ts->cur_pcr;
578 uint8_t buf[TS_PACKET_SIZE];
582 *q++ = ts_st->pid >> 8;
584 *q++ = 0x20 | ts_st->cc; /* Adaptation only */
585 /* Continuity Count field does not increment (see 13818-1 section 2.4.3.3) */
586 *q++ = TS_PACKET_SIZE - 5; /* Adaptation Field Length */
587 *q++ = 0x10; /* Adaptation flags: PCR present */
589 /* PCR coded into 6 bytes */
594 *q++ = (pcr & 1) << 7;
598 memset(q, 0xFF, TS_PACKET_SIZE - (q - buf));
599 put_buffer(s->pb, buf, TS_PACKET_SIZE);
600 ts->cur_pcr += TS_PACKET_SIZE*8*90000LL/ts->mux_rate;
603 static void write_pts(uint8_t *q, int fourbits, int64_t pts)
607 val = fourbits << 4 | (((pts >> 30) & 0x07) << 1) | 1;
609 val = (((pts >> 15) & 0x7fff) << 1) | 1;
612 val = (((pts) & 0x7fff) << 1) | 1;
617 /* Add a pes header to the front of payload, and segment into an integer number of
618 * ts packets. The final ts packet is padded using an over-sized adaptation header
619 * to exactly fill the last ts packet.
620 * NOTE: 'payload' contains a complete PES payload.
622 static void mpegts_write_pes(AVFormatContext *s, AVStream *st,
623 const uint8_t *payload, int payload_size,
624 int64_t pts, int64_t dts)
626 MpegTSWriteStream *ts_st = st->priv_data;
627 MpegTSWrite *ts = s->priv_data;
628 uint8_t buf[TS_PACKET_SIZE];
630 int val, is_start, len, header_len, write_pcr, private_code, flags;
631 int afc_len, stuffing_len;
632 int64_t pcr = -1; /* avoid warning */
633 int64_t delay = av_rescale(s->max_delay, 90000, AV_TIME_BASE);
636 while (payload_size > 0) {
637 retransmit_si_info(s);
640 if (ts_st->pid == ts_st->service->pcr_pid) {
641 if (ts->mux_rate > 1 || is_start) // VBR pcr period is based on frames
642 ts_st->service->pcr_packet_count++;
643 if (ts_st->service->pcr_packet_count >=
644 ts_st->service->pcr_packet_period) {
645 ts_st->service->pcr_packet_count = 0;
650 if (ts->mux_rate > 1 && dts != AV_NOPTS_VALUE &&
651 (dts - (int64_t)ts->cur_pcr) > delay) {
652 /* pcr insert gets priority over null packet insert */
654 mpegts_insert_pcr_only(s, st);
656 mpegts_insert_null_packet(s);
657 continue; /* recalculate write_pcr and possibly retransmit si_info */
660 /* prepare packet header */
663 val = (ts_st->pid >> 8);
668 ts_st->cc = (ts_st->cc + 1) & 0xf;
669 *q++ = 0x10 | ts_st->cc | (write_pcr ? 0x20 : 0);
671 // add 11, pcr references the last byte of program clock reference base
672 if (ts->mux_rate > 1)
673 pcr = ts->cur_pcr + (4+7)*8*90000LL / ts->mux_rate;
676 if (dts != AV_NOPTS_VALUE && dts < pcr)
677 av_log(s, AV_LOG_WARNING, "dts < pcr, TS is invalid\n");
678 *q++ = 7; /* AFC length */
679 *q++ = 0x10; /* flags: PCR present */
684 *q++ = (pcr & 1) << 7;
688 int pes_extension = 0;
689 /* write PES header */
694 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
695 if (st->codec->codec_id == CODEC_ID_DIRAC) {
699 } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
700 (st->codec->codec_id == CODEC_ID_MP2 ||
701 st->codec->codec_id == CODEC_ID_MP3)) {
705 if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE) {
711 if (pts != AV_NOPTS_VALUE) {
715 if (dts != AV_NOPTS_VALUE && pts != AV_NOPTS_VALUE && dts != pts) {
719 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO &&
720 st->codec->codec_id == CODEC_ID_DIRAC) {
721 /* set PES_extension_flag */
726 * One byte for PES2 extension flag +
727 * one byte for extension length +
728 * one byte for extension id
732 len = payload_size + header_len + 3;
733 if (private_code != 0)
740 /* data alignment indicator is required for subtitle data */
741 if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE)
746 if (pts != AV_NOPTS_VALUE) {
747 write_pts(q, flags >> 6, pts);
750 if (dts != AV_NOPTS_VALUE && pts != AV_NOPTS_VALUE && dts != pts) {
751 write_pts(q, 1, dts);
754 if (pes_extension && st->codec->codec_id == CODEC_ID_DIRAC) {
755 flags = 0x01; /* set PES_extension_flag_2 */
757 *q++ = 0x80 | 0x01; /* marker bit + extension length */
759 * Set the stream id extension flag bit to 0 and
760 * write the extended stream id
764 if (private_code != 0)
769 header_len = q - buf;
771 len = TS_PACKET_SIZE - header_len;
772 if (len > payload_size)
774 stuffing_len = TS_PACKET_SIZE - header_len - len;
775 if (stuffing_len > 0) {
776 /* add stuffing with AFC */
778 /* stuffing already present: increase its size */
779 afc_len = buf[4] + 1;
780 memmove(buf + 4 + afc_len + stuffing_len,
782 header_len - (4 + afc_len));
783 buf[4] += stuffing_len;
784 memset(buf + 4 + afc_len, 0xff, stuffing_len);
787 memmove(buf + 4 + stuffing_len, buf + 4, header_len - 4);
789 buf[4] = stuffing_len - 1;
790 if (stuffing_len >= 2) {
792 memset(buf + 6, 0xff, stuffing_len - 2);
796 memcpy(buf + TS_PACKET_SIZE - len, payload, len);
799 put_buffer(s->pb, buf, TS_PACKET_SIZE);
800 ts->cur_pcr += TS_PACKET_SIZE*8*90000LL/ts->mux_rate;
802 put_flush_packet(s->pb);
805 static int mpegts_write_packet(AVFormatContext *s, AVPacket *pkt)
807 AVStream *st = s->streams[pkt->stream_index];
808 int size = pkt->size;
809 uint8_t *buf= pkt->data;
811 MpegTSWriteStream *ts_st = st->priv_data;
812 const uint64_t delay = av_rescale(s->max_delay, 90000, AV_TIME_BASE)*2;
813 int64_t dts = AV_NOPTS_VALUE, pts = AV_NOPTS_VALUE;
815 if (pkt->pts != AV_NOPTS_VALUE)
816 pts = pkt->pts + delay;
817 if (pkt->dts != AV_NOPTS_VALUE)
818 dts = pkt->dts + delay;
820 if (ts_st->first_pts_check && pts == AV_NOPTS_VALUE) {
821 av_log(s, AV_LOG_ERROR, "first pts value must set\n");
824 ts_st->first_pts_check = 0;
826 if (st->codec->codec_id == CODEC_ID_H264) {
827 const uint8_t *p = buf, *buf_end = p+size;
830 if (pkt->size < 5 || AV_RB32(pkt->data) != 0x0000001) {
831 av_log(s, AV_LOG_ERROR, "h264 bitstream malformated, "
832 "no startcode found, use -vbsf h264_mp4toannexb\n");
837 p = ff_find_start_code(p, buf_end, &state);
838 //av_log(s, AV_LOG_INFO, "nal %d\n", state & 0x1f);
839 } while (p < buf_end && (state & 0x1f) != 9 &&
840 (state & 0x1f) != 5 && (state & 0x1f) != 1);
842 if ((state & 0x1f) != 9) { // AUD NAL
843 data = av_malloc(pkt->size+6);
846 memcpy(data+6, pkt->data, pkt->size);
847 AV_WB32(data, 0x00000001);
849 data[5] = 0xf0; // any slice type (0xe) + rbsp stop one bit
853 } else if (st->codec->codec_id == CODEC_ID_AAC) {
856 if ((AV_RB16(pkt->data) & 0xfff0) != 0xfff0) {
857 ADTSContext *adts = ts_st->adts;
860 av_log(s, AV_LOG_ERROR, "aac bitstream not in adts format "
861 "and extradata missing\n");
864 new_size = ADTS_HEADER_SIZE+adts->pce_size+pkt->size;
865 if ((unsigned)new_size >= INT_MAX)
867 data = av_malloc(new_size);
869 return AVERROR(ENOMEM);
870 ff_adts_write_frame_header(adts, data, pkt->size, adts->pce_size);
871 if (adts->pce_size) {
872 memcpy(data+ADTS_HEADER_SIZE, adts->pce_data, adts->pce_size);
875 memcpy(data+ADTS_HEADER_SIZE+adts->pce_size, pkt->data, pkt->size);
881 if (st->codec->codec_type != AVMEDIA_TYPE_AUDIO) {
882 // for video and subtitle, write a single pes packet
883 mpegts_write_pes(s, st, buf, size, pts, dts);
888 if (ts_st->payload_index + size > DEFAULT_PES_PAYLOAD_SIZE) {
889 mpegts_write_pes(s, st, ts_st->payload, ts_st->payload_index,
890 ts_st->payload_pts, ts_st->payload_dts);
891 ts_st->payload_index = 0;
894 if (!ts_st->payload_index) {
895 ts_st->payload_pts = pts;
896 ts_st->payload_dts = dts;
899 memcpy(ts_st->payload + ts_st->payload_index, buf, size);
900 ts_st->payload_index += size;
907 static int mpegts_write_end(AVFormatContext *s)
909 MpegTSWrite *ts = s->priv_data;
910 MpegTSWriteStream *ts_st;
911 MpegTSService *service;
915 /* flush current packets */
916 for(i = 0; i < s->nb_streams; i++) {
918 ts_st = st->priv_data;
919 if (ts_st->payload_index > 0) {
920 mpegts_write_pes(s, st, ts_st->payload, ts_st->payload_index,
921 ts_st->payload_pts, ts_st->payload_dts);
923 av_freep(&ts_st->adts);
925 put_flush_packet(s->pb);
927 for(i = 0; i < ts->nb_services; i++) {
928 service = ts->services[i];
929 av_freep(&service->provider_name);
930 av_freep(&service->name);
933 av_free(ts->services);
938 AVOutputFormat mpegts_muxer = {
940 NULL_IF_CONFIG_SMALL("MPEG-2 transport stream format"),