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00022 #include "libavutil/bswap.h"
00023 #include "libavutil/crc.h"
00024 #include "libavutil/dict.h"
00025 #include "libavutil/mathematics.h"
00026 #include "libavutil/opt.h"
00027 #include "libavcodec/mpegvideo.h"
00028 #include "avformat.h"
00029 #include "internal.h"
00030 #include "mpegts.h"
00031 #include "adts.h"
00032
00033 #define PCR_TIME_BASE 27000000
00034
00035
00036
00037
00038
00039
00040 typedef struct MpegTSSection {
00041 int pid;
00042 int cc;
00043 void (*write_packet)(struct MpegTSSection *s, const uint8_t *packet);
00044 void *opaque;
00045 } MpegTSSection;
00046
00047 typedef struct MpegTSService {
00048 MpegTSSection pmt;
00049 int sid;
00050 char *name;
00051 char *provider_name;
00052 int pcr_pid;
00053 int pcr_packet_count;
00054 int pcr_packet_period;
00055 } MpegTSService;
00056
00057 typedef struct MpegTSWrite {
00058 const AVClass *av_class;
00059 MpegTSSection pat;
00060 MpegTSSection sdt;
00061 MpegTSService **services;
00062 int sdt_packet_count;
00063 int sdt_packet_period;
00064 int pat_packet_count;
00065 int pat_packet_period;
00066 int nb_services;
00067 int onid;
00068 int tsid;
00069 int64_t first_pcr;
00070 int mux_rate;
00071 int pes_payload_size;
00072
00073 int transport_stream_id;
00074 int original_network_id;
00075 int service_id;
00076
00077 int pmt_start_pid;
00078 int start_pid;
00079 } MpegTSWrite;
00080
00081
00082 #define DEFAULT_PES_HEADER_FREQ 16
00083 #define DEFAULT_PES_PAYLOAD_SIZE ((DEFAULT_PES_HEADER_FREQ - 1) * 184 + 170)
00084
00085 static const AVOption options[] = {
00086 { "mpegts_transport_stream_id", "Set transport_stream_id field.",
00087 offsetof(MpegTSWrite, transport_stream_id), AV_OPT_TYPE_INT, {.dbl = 0x0001 }, 0x0001, 0xffff, AV_OPT_FLAG_ENCODING_PARAM},
00088 { "mpegts_original_network_id", "Set original_network_id field.",
00089 offsetof(MpegTSWrite, original_network_id), AV_OPT_TYPE_INT, {.dbl = 0x0001 }, 0x0001, 0xffff, AV_OPT_FLAG_ENCODING_PARAM},
00090 { "mpegts_service_id", "Set service_id field.",
00091 offsetof(MpegTSWrite, service_id), AV_OPT_TYPE_INT, {.dbl = 0x0001 }, 0x0001, 0xffff, AV_OPT_FLAG_ENCODING_PARAM},
00092 { "mpegts_pmt_start_pid", "Set the first pid of the PMT.",
00093 offsetof(MpegTSWrite, pmt_start_pid), AV_OPT_TYPE_INT, {.dbl = 0x1000 }, 0x1000, 0x1f00, AV_OPT_FLAG_ENCODING_PARAM},
00094 { "mpegts_start_pid", "Set the first pid.",
00095 offsetof(MpegTSWrite, start_pid), AV_OPT_TYPE_INT, {.dbl = 0x0100 }, 0x0100, 0x0f00, AV_OPT_FLAG_ENCODING_PARAM},
00096 { "muxrate", NULL, offsetof(MpegTSWrite, mux_rate), AV_OPT_TYPE_INT, {1}, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM},
00097 { "pes_payload_size", "Minimum PES packet payload in bytes",
00098 offsetof(MpegTSWrite, pes_payload_size), AV_OPT_TYPE_INT, {DEFAULT_PES_PAYLOAD_SIZE}, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM},
00099 { NULL },
00100 };
00101
00102 static const AVClass mpegts_muxer_class = {
00103 .class_name = "MPEGTS muxer",
00104 .item_name = av_default_item_name,
00105 .option = options,
00106 .version = LIBAVUTIL_VERSION_INT,
00107 };
00108
00109
00110 static void mpegts_write_section(MpegTSSection *s, uint8_t *buf, int len)
00111 {
00112 unsigned int crc;
00113 unsigned char packet[TS_PACKET_SIZE];
00114 const unsigned char *buf_ptr;
00115 unsigned char *q;
00116 int first, b, len1, left;
00117
00118 crc = av_bswap32(av_crc(av_crc_get_table(AV_CRC_32_IEEE), -1, buf, len - 4));
00119 buf[len - 4] = (crc >> 24) & 0xff;
00120 buf[len - 3] = (crc >> 16) & 0xff;
00121 buf[len - 2] = (crc >> 8) & 0xff;
00122 buf[len - 1] = (crc) & 0xff;
00123
00124
00125 buf_ptr = buf;
00126 while (len > 0) {
00127 first = (buf == buf_ptr);
00128 q = packet;
00129 *q++ = 0x47;
00130 b = (s->pid >> 8);
00131 if (first)
00132 b |= 0x40;
00133 *q++ = b;
00134 *q++ = s->pid;
00135 s->cc = (s->cc + 1) & 0xf;
00136 *q++ = 0x10 | s->cc;
00137 if (first)
00138 *q++ = 0;
00139 len1 = TS_PACKET_SIZE - (q - packet);
00140 if (len1 > len)
00141 len1 = len;
00142 memcpy(q, buf_ptr, len1);
00143 q += len1;
00144
00145 left = TS_PACKET_SIZE - (q - packet);
00146 if (left > 0)
00147 memset(q, 0xff, left);
00148
00149 s->write_packet(s, packet);
00150
00151 buf_ptr += len1;
00152 len -= len1;
00153 }
00154 }
00155
00156 static inline void put16(uint8_t **q_ptr, int val)
00157 {
00158 uint8_t *q;
00159 q = *q_ptr;
00160 *q++ = val >> 8;
00161 *q++ = val;
00162 *q_ptr = q;
00163 }
00164
00165 static int mpegts_write_section1(MpegTSSection *s, int tid, int id,
00166 int version, int sec_num, int last_sec_num,
00167 uint8_t *buf, int len)
00168 {
00169 uint8_t section[1024], *q;
00170 unsigned int tot_len;
00171
00172 unsigned int flags = tid == SDT_TID ? 0xf000 : 0xb000;
00173
00174 tot_len = 3 + 5 + len + 4;
00175
00176 if (tot_len > 1024)
00177 return -1;
00178
00179 q = section;
00180 *q++ = tid;
00181 put16(&q, flags | (len + 5 + 4));
00182 put16(&q, id);
00183 *q++ = 0xc1 | (version << 1);
00184 *q++ = sec_num;
00185 *q++ = last_sec_num;
00186 memcpy(q, buf, len);
00187
00188 mpegts_write_section(s, section, tot_len);
00189 return 0;
00190 }
00191
00192
00193
00194
00195 #define DEFAULT_PROVIDER_NAME "Libav"
00196 #define DEFAULT_SERVICE_NAME "Service01"
00197
00198
00199 #define SDT_RETRANS_TIME 500
00200 #define PAT_RETRANS_TIME 100
00201 #define PCR_RETRANS_TIME 20
00202
00203 typedef struct MpegTSWriteStream {
00204 struct MpegTSService *service;
00205 int pid;
00206 int cc;
00207 int payload_size;
00208 int first_pts_check;
00209 int64_t payload_pts;
00210 int64_t payload_dts;
00211 int payload_flags;
00212 uint8_t *payload;
00213 ADTSContext *adts;
00214 } MpegTSWriteStream;
00215
00216 static void mpegts_write_pat(AVFormatContext *s)
00217 {
00218 MpegTSWrite *ts = s->priv_data;
00219 MpegTSService *service;
00220 uint8_t data[1012], *q;
00221 int i;
00222
00223 q = data;
00224 for(i = 0; i < ts->nb_services; i++) {
00225 service = ts->services[i];
00226 put16(&q, service->sid);
00227 put16(&q, 0xe000 | service->pmt.pid);
00228 }
00229 mpegts_write_section1(&ts->pat, PAT_TID, ts->tsid, 0, 0, 0,
00230 data, q - data);
00231 }
00232
00233 static void mpegts_write_pmt(AVFormatContext *s, MpegTSService *service)
00234 {
00235
00236 uint8_t data[1012], *q, *desc_length_ptr, *program_info_length_ptr;
00237 int val, stream_type, i;
00238
00239 q = data;
00240 put16(&q, 0xe000 | service->pcr_pid);
00241
00242 program_info_length_ptr = q;
00243 q += 2;
00244
00245
00246
00247 val = 0xf000 | (q - program_info_length_ptr - 2);
00248 program_info_length_ptr[0] = val >> 8;
00249 program_info_length_ptr[1] = val;
00250
00251 for(i = 0; i < s->nb_streams; i++) {
00252 AVStream *st = s->streams[i];
00253 MpegTSWriteStream *ts_st = st->priv_data;
00254 AVDictionaryEntry *lang = av_dict_get(st->metadata, "language", NULL,0);
00255 switch(st->codec->codec_id) {
00256 case CODEC_ID_MPEG1VIDEO:
00257 case CODEC_ID_MPEG2VIDEO:
00258 stream_type = STREAM_TYPE_VIDEO_MPEG2;
00259 break;
00260 case CODEC_ID_MPEG4:
00261 stream_type = STREAM_TYPE_VIDEO_MPEG4;
00262 break;
00263 case CODEC_ID_H264:
00264 stream_type = STREAM_TYPE_VIDEO_H264;
00265 break;
00266 case CODEC_ID_DIRAC:
00267 stream_type = STREAM_TYPE_VIDEO_DIRAC;
00268 break;
00269 case CODEC_ID_MP2:
00270 case CODEC_ID_MP3:
00271 stream_type = STREAM_TYPE_AUDIO_MPEG1;
00272 break;
00273 case CODEC_ID_AAC:
00274 stream_type = STREAM_TYPE_AUDIO_AAC;
00275 break;
00276 case CODEC_ID_AAC_LATM:
00277 stream_type = STREAM_TYPE_AUDIO_AAC_LATM;
00278 break;
00279 case CODEC_ID_AC3:
00280 stream_type = STREAM_TYPE_AUDIO_AC3;
00281 break;
00282 default:
00283 stream_type = STREAM_TYPE_PRIVATE_DATA;
00284 break;
00285 }
00286 *q++ = stream_type;
00287 put16(&q, 0xe000 | ts_st->pid);
00288 desc_length_ptr = q;
00289 q += 2;
00290
00291
00292 switch(st->codec->codec_type) {
00293 case AVMEDIA_TYPE_AUDIO:
00294 if (lang) {
00295 char *p;
00296 char *next = lang->value;
00297 uint8_t *len_ptr;
00298
00299 *q++ = 0x0a;
00300 len_ptr = q++;
00301 *len_ptr = 0;
00302
00303 for (p = lang->value; next && *len_ptr < 255 / 4 * 4; p = next + 1) {
00304 next = strchr(p, ',');
00305 if (strlen(p) != 3 && (!next || next != p + 3))
00306 continue;
00307
00308 *q++ = *p++;
00309 *q++ = *p++;
00310 *q++ = *p++;
00311
00312 if (st->disposition & AV_DISPOSITION_CLEAN_EFFECTS)
00313 *q++ = 0x01;
00314 else if (st->disposition & AV_DISPOSITION_HEARING_IMPAIRED)
00315 *q++ = 0x02;
00316 else if (st->disposition & AV_DISPOSITION_VISUAL_IMPAIRED)
00317 *q++ = 0x03;
00318 else
00319 *q++ = 0;
00320
00321 *len_ptr += 4;
00322 }
00323
00324 if (*len_ptr == 0)
00325 q -= 2;
00326 }
00327 break;
00328 case AVMEDIA_TYPE_SUBTITLE:
00329 {
00330 const char *language;
00331 language = lang && strlen(lang->value)==3 ? lang->value : "eng";
00332 *q++ = 0x59;
00333 *q++ = 8;
00334 *q++ = language[0];
00335 *q++ = language[1];
00336 *q++ = language[2];
00337 *q++ = 0x10;
00338 if(st->codec->extradata_size == 4) {
00339 memcpy(q, st->codec->extradata, 4);
00340 q += 4;
00341 } else {
00342 put16(&q, 1);
00343 put16(&q, 1);
00344 }
00345 }
00346 break;
00347 case AVMEDIA_TYPE_VIDEO:
00348 if (stream_type == STREAM_TYPE_VIDEO_DIRAC) {
00349 *q++ = 0x05;
00350 *q++ = 4;
00351 *q++ = 'd';
00352 *q++ = 'r';
00353 *q++ = 'a';
00354 *q++ = 'c';
00355 }
00356 break;
00357 }
00358
00359 val = 0xf000 | (q - desc_length_ptr - 2);
00360 desc_length_ptr[0] = val >> 8;
00361 desc_length_ptr[1] = val;
00362 }
00363 mpegts_write_section1(&service->pmt, PMT_TID, service->sid, 0, 0, 0,
00364 data, q - data);
00365 }
00366
00367
00368 static void putstr8(uint8_t **q_ptr, const char *str)
00369 {
00370 uint8_t *q;
00371 int len;
00372
00373 q = *q_ptr;
00374 if (!str)
00375 len = 0;
00376 else
00377 len = strlen(str);
00378 *q++ = len;
00379 memcpy(q, str, len);
00380 q += len;
00381 *q_ptr = q;
00382 }
00383
00384 static void mpegts_write_sdt(AVFormatContext *s)
00385 {
00386 MpegTSWrite *ts = s->priv_data;
00387 MpegTSService *service;
00388 uint8_t data[1012], *q, *desc_list_len_ptr, *desc_len_ptr;
00389 int i, running_status, free_ca_mode, val;
00390
00391 q = data;
00392 put16(&q, ts->onid);
00393 *q++ = 0xff;
00394 for(i = 0; i < ts->nb_services; i++) {
00395 service = ts->services[i];
00396 put16(&q, service->sid);
00397 *q++ = 0xfc | 0x00;
00398 desc_list_len_ptr = q;
00399 q += 2;
00400 running_status = 4;
00401 free_ca_mode = 0;
00402
00403
00404 *q++ = 0x48;
00405 desc_len_ptr = q;
00406 q++;
00407 *q++ = 0x01;
00408 putstr8(&q, service->provider_name);
00409 putstr8(&q, service->name);
00410 desc_len_ptr[0] = q - desc_len_ptr - 1;
00411
00412
00413 val = (running_status << 13) | (free_ca_mode << 12) |
00414 (q - desc_list_len_ptr - 2);
00415 desc_list_len_ptr[0] = val >> 8;
00416 desc_list_len_ptr[1] = val;
00417 }
00418 mpegts_write_section1(&ts->sdt, SDT_TID, ts->tsid, 0, 0, 0,
00419 data, q - data);
00420 }
00421
00422 static MpegTSService *mpegts_add_service(MpegTSWrite *ts,
00423 int sid,
00424 const char *provider_name,
00425 const char *name)
00426 {
00427 MpegTSService *service;
00428
00429 service = av_mallocz(sizeof(MpegTSService));
00430 if (!service)
00431 return NULL;
00432 service->pmt.pid = ts->pmt_start_pid + ts->nb_services;
00433 service->sid = sid;
00434 service->provider_name = av_strdup(provider_name);
00435 service->name = av_strdup(name);
00436 service->pcr_pid = 0x1fff;
00437 dynarray_add(&ts->services, &ts->nb_services, service);
00438 return service;
00439 }
00440
00441 static void section_write_packet(MpegTSSection *s, const uint8_t *packet)
00442 {
00443 AVFormatContext *ctx = s->opaque;
00444 avio_write(ctx->pb, packet, TS_PACKET_SIZE);
00445 }
00446
00447 static int mpegts_write_header(AVFormatContext *s)
00448 {
00449 MpegTSWrite *ts = s->priv_data;
00450 MpegTSWriteStream *ts_st;
00451 MpegTSService *service;
00452 AVStream *st, *pcr_st = NULL;
00453 AVDictionaryEntry *title, *provider;
00454 int i, j;
00455 const char *service_name;
00456 const char *provider_name;
00457 int *pids;
00458
00459
00460 ts->pes_payload_size = (ts->pes_payload_size + 14 + 183) / 184 * 184 - 14;
00461
00462 ts->tsid = ts->transport_stream_id;
00463 ts->onid = ts->original_network_id;
00464
00465 title = av_dict_get(s->metadata, "service_name", NULL, 0);
00466 if (!title)
00467 title = av_dict_get(s->metadata, "title", NULL, 0);
00468 service_name = title ? title->value : DEFAULT_SERVICE_NAME;
00469 provider = av_dict_get(s->metadata, "service_provider", NULL, 0);
00470 provider_name = provider ? provider->value : DEFAULT_PROVIDER_NAME;
00471 service = mpegts_add_service(ts, ts->service_id, provider_name, service_name);
00472 service->pmt.write_packet = section_write_packet;
00473 service->pmt.opaque = s;
00474 service->pmt.cc = 15;
00475
00476 ts->pat.pid = PAT_PID;
00477 ts->pat.cc = 15;
00478 ts->pat.write_packet = section_write_packet;
00479 ts->pat.opaque = s;
00480
00481 ts->sdt.pid = SDT_PID;
00482 ts->sdt.cc = 15;
00483 ts->sdt.write_packet = section_write_packet;
00484 ts->sdt.opaque = s;
00485
00486 pids = av_malloc(s->nb_streams * sizeof(*pids));
00487 if (!pids)
00488 return AVERROR(ENOMEM);
00489
00490
00491 for(i = 0;i < s->nb_streams; i++) {
00492 st = s->streams[i];
00493 avpriv_set_pts_info(st, 33, 1, 90000);
00494 ts_st = av_mallocz(sizeof(MpegTSWriteStream));
00495 if (!ts_st)
00496 goto fail;
00497 st->priv_data = ts_st;
00498 ts_st->payload = av_mallocz(ts->pes_payload_size);
00499 if (!ts_st->payload)
00500 goto fail;
00501 ts_st->service = service;
00502
00503
00504 if (st->id < 16) {
00505 ts_st->pid = ts->start_pid + i;
00506 } else if (st->id < 0x1FFF) {
00507 ts_st->pid = st->id;
00508 } else {
00509 av_log(s, AV_LOG_ERROR, "Invalid stream id %d, must be less than 8191\n", st->id);
00510 goto fail;
00511 }
00512 if (ts_st->pid == service->pmt.pid) {
00513 av_log(s, AV_LOG_ERROR, "Duplicate stream id %d\n", ts_st->pid);
00514 goto fail;
00515 }
00516 for (j = 0; j < i; j++)
00517 if (pids[j] == ts_st->pid) {
00518 av_log(s, AV_LOG_ERROR, "Duplicate stream id %d\n", ts_st->pid);
00519 goto fail;
00520 }
00521 pids[i] = ts_st->pid;
00522 ts_st->payload_pts = AV_NOPTS_VALUE;
00523 ts_st->payload_dts = AV_NOPTS_VALUE;
00524 ts_st->first_pts_check = 1;
00525 ts_st->cc = 15;
00526
00527 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO &&
00528 service->pcr_pid == 0x1fff) {
00529 service->pcr_pid = ts_st->pid;
00530 pcr_st = st;
00531 }
00532 if (st->codec->codec_id == CODEC_ID_AAC &&
00533 st->codec->extradata_size > 0) {
00534 ts_st->adts = av_mallocz(sizeof(*ts_st->adts));
00535 if (!ts_st->adts)
00536 goto fail;
00537 if (ff_adts_decode_extradata(s, ts_st->adts, st->codec->extradata,
00538 st->codec->extradata_size) < 0)
00539 goto fail;
00540 }
00541 }
00542
00543 av_free(pids);
00544
00545
00546 if (service->pcr_pid == 0x1fff && s->nb_streams > 0) {
00547 pcr_st = s->streams[0];
00548 ts_st = pcr_st->priv_data;
00549 service->pcr_pid = ts_st->pid;
00550 }
00551
00552 #if FF_API_MUXRATE
00553 if (s->mux_rate)
00554 ts->mux_rate = s->mux_rate;
00555 #endif
00556
00557 if (ts->mux_rate > 1) {
00558 service->pcr_packet_period = (ts->mux_rate * PCR_RETRANS_TIME) /
00559 (TS_PACKET_SIZE * 8 * 1000);
00560 ts->sdt_packet_period = (ts->mux_rate * SDT_RETRANS_TIME) /
00561 (TS_PACKET_SIZE * 8 * 1000);
00562 ts->pat_packet_period = (ts->mux_rate * PAT_RETRANS_TIME) /
00563 (TS_PACKET_SIZE * 8 * 1000);
00564
00565 ts->first_pcr = av_rescale(s->max_delay, PCR_TIME_BASE, AV_TIME_BASE);
00566 } else {
00567
00568 ts->sdt_packet_period = 200;
00569 ts->pat_packet_period = 40;
00570 if (pcr_st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
00571 if (!pcr_st->codec->frame_size) {
00572 av_log(s, AV_LOG_WARNING, "frame size not set\n");
00573 service->pcr_packet_period =
00574 pcr_st->codec->sample_rate/(10*512);
00575 } else {
00576 service->pcr_packet_period =
00577 pcr_st->codec->sample_rate/(10*pcr_st->codec->frame_size);
00578 }
00579 } else {
00580
00581 service->pcr_packet_period =
00582 pcr_st->codec->time_base.den/(10*pcr_st->codec->time_base.num);
00583 }
00584 }
00585
00586
00587 service->pcr_packet_count = service->pcr_packet_period;
00588 ts->pat_packet_count = ts->pat_packet_period-1;
00589 ts->sdt_packet_count = ts->sdt_packet_period-1;
00590
00591 if (ts->mux_rate == 1)
00592 av_log(s, AV_LOG_INFO, "muxrate VBR, ");
00593 else
00594 av_log(s, AV_LOG_INFO, "muxrate %d, ", ts->mux_rate);
00595 av_log(s, AV_LOG_INFO, "pcr every %d pkts, "
00596 "sdt every %d, pat/pmt every %d pkts\n",
00597 service->pcr_packet_period,
00598 ts->sdt_packet_period, ts->pat_packet_period);
00599
00600 avio_flush(s->pb);
00601
00602 return 0;
00603
00604 fail:
00605 av_free(pids);
00606 for(i = 0;i < s->nb_streams; i++) {
00607 MpegTSWriteStream *ts_st;
00608 st = s->streams[i];
00609 ts_st = st->priv_data;
00610 if (ts_st) {
00611 av_freep(&ts_st->payload);
00612 av_freep(&ts_st->adts);
00613 }
00614 av_freep(&st->priv_data);
00615 }
00616 return -1;
00617 }
00618
00619
00620 static void retransmit_si_info(AVFormatContext *s)
00621 {
00622 MpegTSWrite *ts = s->priv_data;
00623 int i;
00624
00625 if (++ts->sdt_packet_count == ts->sdt_packet_period) {
00626 ts->sdt_packet_count = 0;
00627 mpegts_write_sdt(s);
00628 }
00629 if (++ts->pat_packet_count == ts->pat_packet_period) {
00630 ts->pat_packet_count = 0;
00631 mpegts_write_pat(s);
00632 for(i = 0; i < ts->nb_services; i++) {
00633 mpegts_write_pmt(s, ts->services[i]);
00634 }
00635 }
00636 }
00637
00638 static int64_t get_pcr(const MpegTSWrite *ts, AVIOContext *pb)
00639 {
00640 return av_rescale(avio_tell(pb) + 11, 8 * PCR_TIME_BASE, ts->mux_rate) +
00641 ts->first_pcr;
00642 }
00643
00644 static int write_pcr_bits(uint8_t *buf, int64_t pcr)
00645 {
00646 int64_t pcr_low = pcr % 300, pcr_high = pcr / 300;
00647
00648 *buf++ = pcr_high >> 25;
00649 *buf++ = pcr_high >> 17;
00650 *buf++ = pcr_high >> 9;
00651 *buf++ = pcr_high >> 1;
00652 *buf++ = pcr_high << 7 | pcr_low >> 8 | 0x7e;
00653 *buf++ = pcr_low;
00654
00655 return 6;
00656 }
00657
00658
00659 static void mpegts_insert_null_packet(AVFormatContext *s)
00660 {
00661 uint8_t *q;
00662 uint8_t buf[TS_PACKET_SIZE];
00663
00664 q = buf;
00665 *q++ = 0x47;
00666 *q++ = 0x00 | 0x1f;
00667 *q++ = 0xff;
00668 *q++ = 0x10;
00669 memset(q, 0x0FF, TS_PACKET_SIZE - (q - buf));
00670 avio_write(s->pb, buf, TS_PACKET_SIZE);
00671 }
00672
00673
00674 static void mpegts_insert_pcr_only(AVFormatContext *s, AVStream *st)
00675 {
00676 MpegTSWrite *ts = s->priv_data;
00677 MpegTSWriteStream *ts_st = st->priv_data;
00678 uint8_t *q;
00679 uint8_t buf[TS_PACKET_SIZE];
00680
00681 q = buf;
00682 *q++ = 0x47;
00683 *q++ = ts_st->pid >> 8;
00684 *q++ = ts_st->pid;
00685 *q++ = 0x20 | ts_st->cc;
00686
00687 *q++ = TS_PACKET_SIZE - 5;
00688 *q++ = 0x10;
00689
00690
00691 q += write_pcr_bits(q, get_pcr(ts, s->pb));
00692
00693
00694 memset(q, 0xFF, TS_PACKET_SIZE - (q - buf));
00695 avio_write(s->pb, buf, TS_PACKET_SIZE);
00696 }
00697
00698 static void write_pts(uint8_t *q, int fourbits, int64_t pts)
00699 {
00700 int val;
00701
00702 val = fourbits << 4 | (((pts >> 30) & 0x07) << 1) | 1;
00703 *q++ = val;
00704 val = (((pts >> 15) & 0x7fff) << 1) | 1;
00705 *q++ = val >> 8;
00706 *q++ = val;
00707 val = (((pts) & 0x7fff) << 1) | 1;
00708 *q++ = val >> 8;
00709 *q++ = val;
00710 }
00711
00712
00713 static void set_af_flag(uint8_t *pkt, int flag)
00714 {
00715
00716 assert(flag);
00717
00718 if ((pkt[3] & 0x20) == 0) {
00719
00720 pkt[3] |= 0x20;
00721
00722 pkt[4] = 1;
00723 pkt[5] = 0;
00724 }
00725 pkt[5] |= flag;
00726 }
00727
00728
00729 static void extend_af(uint8_t *pkt, int size)
00730 {
00731
00732 assert(pkt[3] & 0x20);
00733 pkt[4] += size;
00734 }
00735
00736
00737 static uint8_t *get_ts_payload_start(uint8_t *pkt)
00738 {
00739 if (pkt[3] & 0x20)
00740 return pkt + 5 + pkt[4];
00741 else
00742 return pkt + 4;
00743 }
00744
00745
00746
00747
00748
00749
00750 static void mpegts_write_pes(AVFormatContext *s, AVStream *st,
00751 const uint8_t *payload, int payload_size,
00752 int64_t pts, int64_t dts, int key)
00753 {
00754 MpegTSWriteStream *ts_st = st->priv_data;
00755 MpegTSWrite *ts = s->priv_data;
00756 uint8_t buf[TS_PACKET_SIZE];
00757 uint8_t *q;
00758 int val, is_start, len, header_len, write_pcr, private_code, flags;
00759 int afc_len, stuffing_len;
00760 int64_t pcr = -1;
00761 int64_t delay = av_rescale(s->max_delay, 90000, AV_TIME_BASE);
00762
00763 is_start = 1;
00764 while (payload_size > 0) {
00765 retransmit_si_info(s);
00766
00767 write_pcr = 0;
00768 if (ts_st->pid == ts_st->service->pcr_pid) {
00769 if (ts->mux_rate > 1 || is_start)
00770 ts_st->service->pcr_packet_count++;
00771 if (ts_st->service->pcr_packet_count >=
00772 ts_st->service->pcr_packet_period) {
00773 ts_st->service->pcr_packet_count = 0;
00774 write_pcr = 1;
00775 }
00776 }
00777
00778 if (ts->mux_rate > 1 && dts != AV_NOPTS_VALUE &&
00779 (dts - get_pcr(ts, s->pb)/300) > delay) {
00780
00781 if (write_pcr)
00782 mpegts_insert_pcr_only(s, st);
00783 else
00784 mpegts_insert_null_packet(s);
00785 continue;
00786 }
00787
00788
00789 q = buf;
00790 *q++ = 0x47;
00791 val = (ts_st->pid >> 8);
00792 if (is_start)
00793 val |= 0x40;
00794 *q++ = val;
00795 *q++ = ts_st->pid;
00796 ts_st->cc = (ts_st->cc + 1) & 0xf;
00797 *q++ = 0x10 | ts_st->cc;
00798 if (key && is_start && pts != AV_NOPTS_VALUE) {
00799
00800 if (ts_st->pid == ts_st->service->pcr_pid)
00801 write_pcr = 1;
00802 set_af_flag(buf, 0x40);
00803 q = get_ts_payload_start(buf);
00804 }
00805 if (write_pcr) {
00806 set_af_flag(buf, 0x10);
00807 q = get_ts_payload_start(buf);
00808
00809 if (ts->mux_rate > 1)
00810 pcr = get_pcr(ts, s->pb);
00811 else
00812 pcr = (dts - delay)*300;
00813 if (dts != AV_NOPTS_VALUE && dts < pcr / 300)
00814 av_log(s, AV_LOG_WARNING, "dts < pcr, TS is invalid\n");
00815 extend_af(buf, write_pcr_bits(q, pcr));
00816 q = get_ts_payload_start(buf);
00817 }
00818 if (is_start) {
00819 int pes_extension = 0;
00820
00821 *q++ = 0x00;
00822 *q++ = 0x00;
00823 *q++ = 0x01;
00824 private_code = 0;
00825 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
00826 if (st->codec->codec_id == CODEC_ID_DIRAC) {
00827 *q++ = 0xfd;
00828 } else
00829 *q++ = 0xe0;
00830 } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
00831 (st->codec->codec_id == CODEC_ID_MP2 ||
00832 st->codec->codec_id == CODEC_ID_MP3 ||
00833 st->codec->codec_id == CODEC_ID_AAC)) {
00834 *q++ = 0xc0;
00835 } else {
00836 *q++ = 0xbd;
00837 if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE) {
00838 private_code = 0x20;
00839 }
00840 }
00841 header_len = 0;
00842 flags = 0;
00843 if (pts != AV_NOPTS_VALUE) {
00844 header_len += 5;
00845 flags |= 0x80;
00846 }
00847 if (dts != AV_NOPTS_VALUE && pts != AV_NOPTS_VALUE && dts != pts) {
00848 header_len += 5;
00849 flags |= 0x40;
00850 }
00851 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO &&
00852 st->codec->codec_id == CODEC_ID_DIRAC) {
00853
00854 pes_extension = 1;
00855 flags |= 0x01;
00856
00857
00858
00859
00860
00861
00862 header_len += 3;
00863 }
00864 len = payload_size + header_len + 3;
00865 if (private_code != 0)
00866 len++;
00867 if (len > 0xffff)
00868 len = 0;
00869 *q++ = len >> 8;
00870 *q++ = len;
00871 val = 0x80;
00872
00873 if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE)
00874 val |= 0x04;
00875 *q++ = val;
00876 *q++ = flags;
00877 *q++ = header_len;
00878 if (pts != AV_NOPTS_VALUE) {
00879 write_pts(q, flags >> 6, pts);
00880 q += 5;
00881 }
00882 if (dts != AV_NOPTS_VALUE && pts != AV_NOPTS_VALUE && dts != pts) {
00883 write_pts(q, 1, dts);
00884 q += 5;
00885 }
00886 if (pes_extension && st->codec->codec_id == CODEC_ID_DIRAC) {
00887 flags = 0x01;
00888 *q++ = flags;
00889 *q++ = 0x80 | 0x01;
00890
00891
00892
00893
00894 *q++ = 0x00 | 0x60;
00895 }
00896 if (private_code != 0)
00897 *q++ = private_code;
00898 is_start = 0;
00899 }
00900
00901 header_len = q - buf;
00902
00903 len = TS_PACKET_SIZE - header_len;
00904 if (len > payload_size)
00905 len = payload_size;
00906 stuffing_len = TS_PACKET_SIZE - header_len - len;
00907 if (stuffing_len > 0) {
00908
00909 if (buf[3] & 0x20) {
00910
00911 afc_len = buf[4] + 1;
00912 memmove(buf + 4 + afc_len + stuffing_len,
00913 buf + 4 + afc_len,
00914 header_len - (4 + afc_len));
00915 buf[4] += stuffing_len;
00916 memset(buf + 4 + afc_len, 0xff, stuffing_len);
00917 } else {
00918
00919 memmove(buf + 4 + stuffing_len, buf + 4, header_len - 4);
00920 buf[3] |= 0x20;
00921 buf[4] = stuffing_len - 1;
00922 if (stuffing_len >= 2) {
00923 buf[5] = 0x00;
00924 memset(buf + 6, 0xff, stuffing_len - 2);
00925 }
00926 }
00927 }
00928 memcpy(buf + TS_PACKET_SIZE - len, payload, len);
00929 payload += len;
00930 payload_size -= len;
00931 avio_write(s->pb, buf, TS_PACKET_SIZE);
00932 }
00933 avio_flush(s->pb);
00934 }
00935
00936 static int mpegts_write_packet(AVFormatContext *s, AVPacket *pkt)
00937 {
00938 AVStream *st = s->streams[pkt->stream_index];
00939 int size = pkt->size;
00940 uint8_t *buf= pkt->data;
00941 uint8_t *data= NULL;
00942 MpegTSWrite *ts = s->priv_data;
00943 MpegTSWriteStream *ts_st = st->priv_data;
00944 const uint64_t delay = av_rescale(s->max_delay, 90000, AV_TIME_BASE)*2;
00945 int64_t dts = AV_NOPTS_VALUE, pts = AV_NOPTS_VALUE;
00946
00947 if (pkt->pts != AV_NOPTS_VALUE)
00948 pts = pkt->pts + delay;
00949 if (pkt->dts != AV_NOPTS_VALUE)
00950 dts = pkt->dts + delay;
00951
00952 if (ts_st->first_pts_check && pts == AV_NOPTS_VALUE) {
00953 av_log(s, AV_LOG_ERROR, "first pts value must set\n");
00954 return -1;
00955 }
00956 ts_st->first_pts_check = 0;
00957
00958 if (st->codec->codec_id == CODEC_ID_H264) {
00959 const uint8_t *p = buf, *buf_end = p+size;
00960 uint32_t state = -1;
00961
00962 if (pkt->size < 5 || AV_RB32(pkt->data) != 0x0000001) {
00963 av_log(s, AV_LOG_ERROR, "H.264 bitstream malformed, "
00964 "no startcode found, use -vbsf h264_mp4toannexb\n");
00965 return -1;
00966 }
00967
00968 do {
00969 p = avpriv_mpv_find_start_code(p, buf_end, &state);
00970
00971 } while (p < buf_end && (state & 0x1f) != 9 &&
00972 (state & 0x1f) != 5 && (state & 0x1f) != 1);
00973
00974 if ((state & 0x1f) != 9) {
00975 data = av_malloc(pkt->size+6);
00976 if (!data)
00977 return -1;
00978 memcpy(data+6, pkt->data, pkt->size);
00979 AV_WB32(data, 0x00000001);
00980 data[4] = 0x09;
00981 data[5] = 0xf0;
00982 buf = data;
00983 size = pkt->size+6;
00984 }
00985 } else if (st->codec->codec_id == CODEC_ID_AAC) {
00986 if (pkt->size < 2)
00987 return -1;
00988 if ((AV_RB16(pkt->data) & 0xfff0) != 0xfff0) {
00989 ADTSContext *adts = ts_st->adts;
00990 int new_size, err;
00991 if (!adts) {
00992 av_log(s, AV_LOG_ERROR, "aac bitstream not in adts format "
00993 "and extradata missing\n");
00994 return -1;
00995 }
00996 new_size = ADTS_HEADER_SIZE+adts->pce_size+pkt->size;
00997 if ((unsigned)new_size >= INT_MAX)
00998 return -1;
00999 data = av_malloc(new_size);
01000 if (!data)
01001 return AVERROR(ENOMEM);
01002 err = ff_adts_write_frame_header(adts, data, pkt->size,
01003 adts->pce_size);
01004 if (err < 0) {
01005 av_free(data);
01006 return err;
01007 }
01008 if (adts->pce_size) {
01009 memcpy(data+ADTS_HEADER_SIZE, adts->pce_data, adts->pce_size);
01010 adts->pce_size = 0;
01011 }
01012 memcpy(data+ADTS_HEADER_SIZE+adts->pce_size, pkt->data, pkt->size);
01013 buf = data;
01014 size = new_size;
01015 }
01016 }
01017
01018 if (st->codec->codec_type != AVMEDIA_TYPE_AUDIO) {
01019
01020 mpegts_write_pes(s, st, buf, size, pts, dts, pkt->flags & AV_PKT_FLAG_KEY);
01021 av_free(data);
01022 return 0;
01023 }
01024
01025 if (ts_st->payload_size + size > ts->pes_payload_size) {
01026 if (ts_st->payload_size) {
01027 mpegts_write_pes(s, st, ts_st->payload, ts_st->payload_size,
01028 ts_st->payload_pts, ts_st->payload_dts,
01029 ts_st->payload_flags & AV_PKT_FLAG_KEY);
01030 ts_st->payload_size = 0;
01031 }
01032 if (size > ts->pes_payload_size) {
01033 mpegts_write_pes(s, st, buf, size, pts, dts,
01034 pkt->flags & AV_PKT_FLAG_KEY);
01035 av_free(data);
01036 return 0;
01037 }
01038 }
01039
01040 if (!ts_st->payload_size) {
01041 ts_st->payload_pts = pts;
01042 ts_st->payload_dts = dts;
01043 ts_st->payload_flags = pkt->flags;
01044 }
01045
01046 memcpy(ts_st->payload + ts_st->payload_size, buf, size);
01047 ts_st->payload_size += size;
01048
01049 av_free(data);
01050
01051 return 0;
01052 }
01053
01054 static int mpegts_write_end(AVFormatContext *s)
01055 {
01056 MpegTSWrite *ts = s->priv_data;
01057 MpegTSWriteStream *ts_st;
01058 MpegTSService *service;
01059 AVStream *st;
01060 int i;
01061
01062
01063 for(i = 0; i < s->nb_streams; i++) {
01064 st = s->streams[i];
01065 ts_st = st->priv_data;
01066 if (ts_st->payload_size > 0) {
01067 mpegts_write_pes(s, st, ts_st->payload, ts_st->payload_size,
01068 ts_st->payload_pts, ts_st->payload_dts,
01069 ts_st->payload_flags & AV_PKT_FLAG_KEY);
01070 }
01071 av_freep(&ts_st->payload);
01072 av_freep(&ts_st->adts);
01073 }
01074 avio_flush(s->pb);
01075
01076 for(i = 0; i < ts->nb_services; i++) {
01077 service = ts->services[i];
01078 av_freep(&service->provider_name);
01079 av_freep(&service->name);
01080 av_free(service);
01081 }
01082 av_free(ts->services);
01083
01084 return 0;
01085 }
01086
01087 AVOutputFormat ff_mpegts_muxer = {
01088 .name = "mpegts",
01089 .long_name = NULL_IF_CONFIG_SMALL("MPEG-2 transport stream format"),
01090 .mime_type = "video/x-mpegts",
01091 .extensions = "ts,m2t",
01092 .priv_data_size = sizeof(MpegTSWrite),
01093 .audio_codec = CODEC_ID_MP2,
01094 .video_codec = CODEC_ID_MPEG2VIDEO,
01095 .write_header = mpegts_write_header,
01096 .write_packet = mpegts_write_packet,
01097 .write_trailer = mpegts_write_end,
01098 .priv_class = &mpegts_muxer_class,
01099 };