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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
00111 #define SECTION_LENGTH 1020
00112
00113
00114 static void mpegts_write_section(MpegTSSection *s, uint8_t *buf, int len)
00115 {
00116 unsigned int crc;
00117 unsigned char packet[TS_PACKET_SIZE];
00118 const unsigned char *buf_ptr;
00119 unsigned char *q;
00120 int first, b, len1, left;
00121
00122 crc = av_bswap32(av_crc(av_crc_get_table(AV_CRC_32_IEEE), -1, buf, len - 4));
00123 buf[len - 4] = (crc >> 24) & 0xff;
00124 buf[len - 3] = (crc >> 16) & 0xff;
00125 buf[len - 2] = (crc >> 8) & 0xff;
00126 buf[len - 1] = (crc) & 0xff;
00127
00128
00129 buf_ptr = buf;
00130 while (len > 0) {
00131 first = (buf == buf_ptr);
00132 q = packet;
00133 *q++ = 0x47;
00134 b = (s->pid >> 8);
00135 if (first)
00136 b |= 0x40;
00137 *q++ = b;
00138 *q++ = s->pid;
00139 s->cc = (s->cc + 1) & 0xf;
00140 *q++ = 0x10 | s->cc;
00141 if (first)
00142 *q++ = 0;
00143 len1 = TS_PACKET_SIZE - (q - packet);
00144 if (len1 > len)
00145 len1 = len;
00146 memcpy(q, buf_ptr, len1);
00147 q += len1;
00148
00149 left = TS_PACKET_SIZE - (q - packet);
00150 if (left > 0)
00151 memset(q, 0xff, left);
00152
00153 s->write_packet(s, packet);
00154
00155 buf_ptr += len1;
00156 len -= len1;
00157 }
00158 }
00159
00160 static inline void put16(uint8_t **q_ptr, int val)
00161 {
00162 uint8_t *q;
00163 q = *q_ptr;
00164 *q++ = val >> 8;
00165 *q++ = val;
00166 *q_ptr = q;
00167 }
00168
00169 static int mpegts_write_section1(MpegTSSection *s, int tid, int id,
00170 int version, int sec_num, int last_sec_num,
00171 uint8_t *buf, int len)
00172 {
00173 uint8_t section[1024], *q;
00174 unsigned int tot_len;
00175
00176 unsigned int flags = tid == SDT_TID ? 0xf000 : 0xb000;
00177
00178 tot_len = 3 + 5 + len + 4;
00179
00180 if (tot_len > 1024)
00181 return -1;
00182
00183 q = section;
00184 *q++ = tid;
00185 put16(&q, flags | (len + 5 + 4));
00186 put16(&q, id);
00187 *q++ = 0xc1 | (version << 1);
00188 *q++ = sec_num;
00189 *q++ = last_sec_num;
00190 memcpy(q, buf, len);
00191
00192 mpegts_write_section(s, section, tot_len);
00193 return 0;
00194 }
00195
00196
00197
00198
00199 #define DEFAULT_PROVIDER_NAME "Libav"
00200 #define DEFAULT_SERVICE_NAME "Service01"
00201
00202
00203 #define SDT_RETRANS_TIME 500
00204 #define PAT_RETRANS_TIME 100
00205 #define PCR_RETRANS_TIME 20
00206
00207 typedef struct MpegTSWriteStream {
00208 struct MpegTSService *service;
00209 int pid;
00210 int cc;
00211 int payload_size;
00212 int first_pts_check;
00213 int64_t payload_pts;
00214 int64_t payload_dts;
00215 int payload_flags;
00216 uint8_t *payload;
00217 ADTSContext *adts;
00218 } MpegTSWriteStream;
00219
00220 static void mpegts_write_pat(AVFormatContext *s)
00221 {
00222 MpegTSWrite *ts = s->priv_data;
00223 MpegTSService *service;
00224 uint8_t data[SECTION_LENGTH], *q;
00225 int i;
00226
00227 q = data;
00228 for(i = 0; i < ts->nb_services; i++) {
00229 service = ts->services[i];
00230 put16(&q, service->sid);
00231 put16(&q, 0xe000 | service->pmt.pid);
00232 }
00233 mpegts_write_section1(&ts->pat, PAT_TID, ts->tsid, 0, 0, 0,
00234 data, q - data);
00235 }
00236
00237 static void mpegts_write_pmt(AVFormatContext *s, MpegTSService *service)
00238 {
00239 uint8_t data[SECTION_LENGTH], *q, *desc_length_ptr, *program_info_length_ptr;
00240 int val, stream_type, i, err = 0;
00241
00242 q = data;
00243 put16(&q, 0xe000 | service->pcr_pid);
00244
00245 program_info_length_ptr = q;
00246 q += 2;
00247
00248
00249
00250 val = 0xf000 | (q - program_info_length_ptr - 2);
00251 program_info_length_ptr[0] = val >> 8;
00252 program_info_length_ptr[1] = val;
00253
00254 for(i = 0; i < s->nb_streams; i++) {
00255 AVStream *st = s->streams[i];
00256 MpegTSWriteStream *ts_st = st->priv_data;
00257 AVDictionaryEntry *lang = av_dict_get(st->metadata, "language", NULL,0);
00258
00259 if (q - data > SECTION_LENGTH - 3 - 2 - 6) {
00260 err = 1;
00261 break;
00262 }
00263 switch(st->codec->codec_id) {
00264 case CODEC_ID_MPEG1VIDEO:
00265 case CODEC_ID_MPEG2VIDEO:
00266 stream_type = STREAM_TYPE_VIDEO_MPEG2;
00267 break;
00268 case CODEC_ID_MPEG4:
00269 stream_type = STREAM_TYPE_VIDEO_MPEG4;
00270 break;
00271 case CODEC_ID_H264:
00272 stream_type = STREAM_TYPE_VIDEO_H264;
00273 break;
00274 case CODEC_ID_DIRAC:
00275 stream_type = STREAM_TYPE_VIDEO_DIRAC;
00276 break;
00277 case CODEC_ID_MP2:
00278 case CODEC_ID_MP3:
00279 stream_type = STREAM_TYPE_AUDIO_MPEG1;
00280 break;
00281 case CODEC_ID_AAC:
00282 stream_type = STREAM_TYPE_AUDIO_AAC;
00283 break;
00284 case CODEC_ID_AAC_LATM:
00285 stream_type = STREAM_TYPE_AUDIO_AAC_LATM;
00286 break;
00287 case CODEC_ID_AC3:
00288 stream_type = STREAM_TYPE_AUDIO_AC3;
00289 break;
00290 default:
00291 stream_type = STREAM_TYPE_PRIVATE_DATA;
00292 break;
00293 }
00294 *q++ = stream_type;
00295 put16(&q, 0xe000 | ts_st->pid);
00296 desc_length_ptr = q;
00297 q += 2;
00298
00299
00300 switch(st->codec->codec_type) {
00301 case AVMEDIA_TYPE_AUDIO:
00302 if (lang) {
00303 char *p;
00304 char *next = lang->value;
00305 uint8_t *len_ptr;
00306
00307 *q++ = 0x0a;
00308 len_ptr = q++;
00309 *len_ptr = 0;
00310
00311 for (p = lang->value; next && *len_ptr < 255 / 4 * 4; p = next + 1) {
00312 if (q - data > SECTION_LENGTH - 4) {
00313 err = 1;
00314 break;
00315 }
00316 next = strchr(p, ',');
00317 if (strlen(p) != 3 && (!next || next != p + 3))
00318 continue;
00319
00320 *q++ = *p++;
00321 *q++ = *p++;
00322 *q++ = *p++;
00323
00324 if (st->disposition & AV_DISPOSITION_CLEAN_EFFECTS)
00325 *q++ = 0x01;
00326 else if (st->disposition & AV_DISPOSITION_HEARING_IMPAIRED)
00327 *q++ = 0x02;
00328 else if (st->disposition & AV_DISPOSITION_VISUAL_IMPAIRED)
00329 *q++ = 0x03;
00330 else
00331 *q++ = 0;
00332
00333 *len_ptr += 4;
00334 }
00335
00336 if (*len_ptr == 0)
00337 q -= 2;
00338 }
00339 break;
00340 case AVMEDIA_TYPE_SUBTITLE:
00341 {
00342 const char *language;
00343 language = lang && strlen(lang->value)==3 ? lang->value : "eng";
00344 *q++ = 0x59;
00345 *q++ = 8;
00346 *q++ = language[0];
00347 *q++ = language[1];
00348 *q++ = language[2];
00349 *q++ = 0x10;
00350
00351 if (q - data > SECTION_LENGTH - 4) {
00352 err = 1;
00353 break;
00354 }
00355 if(st->codec->extradata_size == 4) {
00356 memcpy(q, st->codec->extradata, 4);
00357 q += 4;
00358 } else {
00359 put16(&q, 1);
00360 put16(&q, 1);
00361 }
00362 }
00363 break;
00364 case AVMEDIA_TYPE_VIDEO:
00365 if (stream_type == STREAM_TYPE_VIDEO_DIRAC) {
00366 *q++ = 0x05;
00367 *q++ = 4;
00368 *q++ = 'd';
00369 *q++ = 'r';
00370 *q++ = 'a';
00371 *q++ = 'c';
00372 }
00373 break;
00374 }
00375
00376 val = 0xf000 | (q - desc_length_ptr - 2);
00377 desc_length_ptr[0] = val >> 8;
00378 desc_length_ptr[1] = val;
00379 }
00380
00381 if (err)
00382 av_log(s, AV_LOG_ERROR,
00383 "The PMT section is too small for stream %d and following.\n"
00384 "Try reducing the number of languages in the audio streams "
00385 "or the total number of streams.\n",
00386 i);
00387
00388 mpegts_write_section1(&service->pmt, PMT_TID, service->sid, 0, 0, 0,
00389 data, q - data);
00390 }
00391
00392
00393 static void putstr8(uint8_t **q_ptr, const char *str)
00394 {
00395 uint8_t *q;
00396 int len;
00397
00398 q = *q_ptr;
00399 if (!str)
00400 len = 0;
00401 else
00402 len = strlen(str);
00403 *q++ = len;
00404 memcpy(q, str, len);
00405 q += len;
00406 *q_ptr = q;
00407 }
00408
00409 static void mpegts_write_sdt(AVFormatContext *s)
00410 {
00411 MpegTSWrite *ts = s->priv_data;
00412 MpegTSService *service;
00413 uint8_t data[SECTION_LENGTH], *q, *desc_list_len_ptr, *desc_len_ptr;
00414 int i, running_status, free_ca_mode, val;
00415
00416 q = data;
00417 put16(&q, ts->onid);
00418 *q++ = 0xff;
00419 for(i = 0; i < ts->nb_services; i++) {
00420 service = ts->services[i];
00421 put16(&q, service->sid);
00422 *q++ = 0xfc | 0x00;
00423 desc_list_len_ptr = q;
00424 q += 2;
00425 running_status = 4;
00426 free_ca_mode = 0;
00427
00428
00429 *q++ = 0x48;
00430 desc_len_ptr = q;
00431 q++;
00432 *q++ = 0x01;
00433 putstr8(&q, service->provider_name);
00434 putstr8(&q, service->name);
00435 desc_len_ptr[0] = q - desc_len_ptr - 1;
00436
00437
00438 val = (running_status << 13) | (free_ca_mode << 12) |
00439 (q - desc_list_len_ptr - 2);
00440 desc_list_len_ptr[0] = val >> 8;
00441 desc_list_len_ptr[1] = val;
00442 }
00443 mpegts_write_section1(&ts->sdt, SDT_TID, ts->tsid, 0, 0, 0,
00444 data, q - data);
00445 }
00446
00447 static MpegTSService *mpegts_add_service(MpegTSWrite *ts,
00448 int sid,
00449 const char *provider_name,
00450 const char *name)
00451 {
00452 MpegTSService *service;
00453
00454 service = av_mallocz(sizeof(MpegTSService));
00455 if (!service)
00456 return NULL;
00457 service->pmt.pid = ts->pmt_start_pid + ts->nb_services;
00458 service->sid = sid;
00459 service->provider_name = av_strdup(provider_name);
00460 service->name = av_strdup(name);
00461 service->pcr_pid = 0x1fff;
00462 dynarray_add(&ts->services, &ts->nb_services, service);
00463 return service;
00464 }
00465
00466 static void section_write_packet(MpegTSSection *s, const uint8_t *packet)
00467 {
00468 AVFormatContext *ctx = s->opaque;
00469 avio_write(ctx->pb, packet, TS_PACKET_SIZE);
00470 }
00471
00472 static int mpegts_write_header(AVFormatContext *s)
00473 {
00474 MpegTSWrite *ts = s->priv_data;
00475 MpegTSWriteStream *ts_st;
00476 MpegTSService *service;
00477 AVStream *st, *pcr_st = NULL;
00478 AVDictionaryEntry *title, *provider;
00479 int i, j;
00480 const char *service_name;
00481 const char *provider_name;
00482 int *pids;
00483
00484
00485 ts->pes_payload_size = (ts->pes_payload_size + 14 + 183) / 184 * 184 - 14;
00486
00487 ts->tsid = ts->transport_stream_id;
00488 ts->onid = ts->original_network_id;
00489
00490 title = av_dict_get(s->metadata, "service_name", NULL, 0);
00491 if (!title)
00492 title = av_dict_get(s->metadata, "title", NULL, 0);
00493 service_name = title ? title->value : DEFAULT_SERVICE_NAME;
00494 provider = av_dict_get(s->metadata, "service_provider", NULL, 0);
00495 provider_name = provider ? provider->value : DEFAULT_PROVIDER_NAME;
00496 service = mpegts_add_service(ts, ts->service_id, provider_name, service_name);
00497 service->pmt.write_packet = section_write_packet;
00498 service->pmt.opaque = s;
00499 service->pmt.cc = 15;
00500
00501 ts->pat.pid = PAT_PID;
00502 ts->pat.cc = 15;
00503 ts->pat.write_packet = section_write_packet;
00504 ts->pat.opaque = s;
00505
00506 ts->sdt.pid = SDT_PID;
00507 ts->sdt.cc = 15;
00508 ts->sdt.write_packet = section_write_packet;
00509 ts->sdt.opaque = s;
00510
00511 pids = av_malloc(s->nb_streams * sizeof(*pids));
00512 if (!pids)
00513 return AVERROR(ENOMEM);
00514
00515
00516 for(i = 0;i < s->nb_streams; i++) {
00517 st = s->streams[i];
00518 avpriv_set_pts_info(st, 33, 1, 90000);
00519 ts_st = av_mallocz(sizeof(MpegTSWriteStream));
00520 if (!ts_st)
00521 goto fail;
00522 st->priv_data = ts_st;
00523 ts_st->payload = av_mallocz(ts->pes_payload_size);
00524 if (!ts_st->payload)
00525 goto fail;
00526 ts_st->service = service;
00527
00528
00529 if (st->id < 16) {
00530 ts_st->pid = ts->start_pid + i;
00531 } else if (st->id < 0x1FFF) {
00532 ts_st->pid = st->id;
00533 } else {
00534 av_log(s, AV_LOG_ERROR, "Invalid stream id %d, must be less than 8191\n", st->id);
00535 goto fail;
00536 }
00537 if (ts_st->pid == service->pmt.pid) {
00538 av_log(s, AV_LOG_ERROR, "Duplicate stream id %d\n", ts_st->pid);
00539 goto fail;
00540 }
00541 for (j = 0; j < i; j++)
00542 if (pids[j] == ts_st->pid) {
00543 av_log(s, AV_LOG_ERROR, "Duplicate stream id %d\n", ts_st->pid);
00544 goto fail;
00545 }
00546 pids[i] = ts_st->pid;
00547 ts_st->payload_pts = AV_NOPTS_VALUE;
00548 ts_st->payload_dts = AV_NOPTS_VALUE;
00549 ts_st->first_pts_check = 1;
00550 ts_st->cc = 15;
00551
00552 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO &&
00553 service->pcr_pid == 0x1fff) {
00554 service->pcr_pid = ts_st->pid;
00555 pcr_st = st;
00556 }
00557 if (st->codec->codec_id == CODEC_ID_AAC &&
00558 st->codec->extradata_size > 0) {
00559 ts_st->adts = av_mallocz(sizeof(*ts_st->adts));
00560 if (!ts_st->adts)
00561 goto fail;
00562 if (ff_adts_decode_extradata(s, ts_st->adts, st->codec->extradata,
00563 st->codec->extradata_size) < 0)
00564 goto fail;
00565 }
00566 }
00567
00568 av_free(pids);
00569
00570
00571 if (service->pcr_pid == 0x1fff && s->nb_streams > 0) {
00572 pcr_st = s->streams[0];
00573 ts_st = pcr_st->priv_data;
00574 service->pcr_pid = ts_st->pid;
00575 }
00576
00577 #if FF_API_MUXRATE
00578 if (s->mux_rate)
00579 ts->mux_rate = s->mux_rate;
00580 #endif
00581
00582 if (ts->mux_rate > 1) {
00583 service->pcr_packet_period = (ts->mux_rate * PCR_RETRANS_TIME) /
00584 (TS_PACKET_SIZE * 8 * 1000);
00585 ts->sdt_packet_period = (ts->mux_rate * SDT_RETRANS_TIME) /
00586 (TS_PACKET_SIZE * 8 * 1000);
00587 ts->pat_packet_period = (ts->mux_rate * PAT_RETRANS_TIME) /
00588 (TS_PACKET_SIZE * 8 * 1000);
00589
00590 ts->first_pcr = av_rescale(s->max_delay, PCR_TIME_BASE, AV_TIME_BASE);
00591 } else {
00592
00593 ts->sdt_packet_period = 200;
00594 ts->pat_packet_period = 40;
00595 if (pcr_st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
00596 if (!pcr_st->codec->frame_size) {
00597 av_log(s, AV_LOG_WARNING, "frame size not set\n");
00598 service->pcr_packet_period =
00599 pcr_st->codec->sample_rate/(10*512);
00600 } else {
00601 service->pcr_packet_period =
00602 pcr_st->codec->sample_rate/(10*pcr_st->codec->frame_size);
00603 }
00604 } else {
00605
00606 service->pcr_packet_period =
00607 pcr_st->codec->time_base.den/(10*pcr_st->codec->time_base.num);
00608 }
00609 }
00610
00611
00612 service->pcr_packet_count = service->pcr_packet_period;
00613 ts->pat_packet_count = ts->pat_packet_period-1;
00614 ts->sdt_packet_count = ts->sdt_packet_period-1;
00615
00616 if (ts->mux_rate == 1)
00617 av_log(s, AV_LOG_INFO, "muxrate VBR, ");
00618 else
00619 av_log(s, AV_LOG_INFO, "muxrate %d, ", ts->mux_rate);
00620 av_log(s, AV_LOG_INFO, "pcr every %d pkts, "
00621 "sdt every %d, pat/pmt every %d pkts\n",
00622 service->pcr_packet_period,
00623 ts->sdt_packet_period, ts->pat_packet_period);
00624
00625 avio_flush(s->pb);
00626
00627 return 0;
00628
00629 fail:
00630 av_free(pids);
00631 for(i = 0;i < s->nb_streams; i++) {
00632 MpegTSWriteStream *ts_st;
00633 st = s->streams[i];
00634 ts_st = st->priv_data;
00635 if (ts_st) {
00636 av_freep(&ts_st->payload);
00637 av_freep(&ts_st->adts);
00638 }
00639 av_freep(&st->priv_data);
00640 }
00641 return -1;
00642 }
00643
00644
00645 static void retransmit_si_info(AVFormatContext *s)
00646 {
00647 MpegTSWrite *ts = s->priv_data;
00648 int i;
00649
00650 if (++ts->sdt_packet_count == ts->sdt_packet_period) {
00651 ts->sdt_packet_count = 0;
00652 mpegts_write_sdt(s);
00653 }
00654 if (++ts->pat_packet_count == ts->pat_packet_period) {
00655 ts->pat_packet_count = 0;
00656 mpegts_write_pat(s);
00657 for(i = 0; i < ts->nb_services; i++) {
00658 mpegts_write_pmt(s, ts->services[i]);
00659 }
00660 }
00661 }
00662
00663 static int64_t get_pcr(const MpegTSWrite *ts, AVIOContext *pb)
00664 {
00665 return av_rescale(avio_tell(pb) + 11, 8 * PCR_TIME_BASE, ts->mux_rate) +
00666 ts->first_pcr;
00667 }
00668
00669 static int write_pcr_bits(uint8_t *buf, int64_t pcr)
00670 {
00671 int64_t pcr_low = pcr % 300, pcr_high = pcr / 300;
00672
00673 *buf++ = pcr_high >> 25;
00674 *buf++ = pcr_high >> 17;
00675 *buf++ = pcr_high >> 9;
00676 *buf++ = pcr_high >> 1;
00677 *buf++ = pcr_high << 7 | pcr_low >> 8 | 0x7e;
00678 *buf++ = pcr_low;
00679
00680 return 6;
00681 }
00682
00683
00684 static void mpegts_insert_null_packet(AVFormatContext *s)
00685 {
00686 uint8_t *q;
00687 uint8_t buf[TS_PACKET_SIZE];
00688
00689 q = buf;
00690 *q++ = 0x47;
00691 *q++ = 0x00 | 0x1f;
00692 *q++ = 0xff;
00693 *q++ = 0x10;
00694 memset(q, 0x0FF, TS_PACKET_SIZE - (q - buf));
00695 avio_write(s->pb, buf, TS_PACKET_SIZE);
00696 }
00697
00698
00699 static void mpegts_insert_pcr_only(AVFormatContext *s, AVStream *st)
00700 {
00701 MpegTSWrite *ts = s->priv_data;
00702 MpegTSWriteStream *ts_st = st->priv_data;
00703 uint8_t *q;
00704 uint8_t buf[TS_PACKET_SIZE];
00705
00706 q = buf;
00707 *q++ = 0x47;
00708 *q++ = ts_st->pid >> 8;
00709 *q++ = ts_st->pid;
00710 *q++ = 0x20 | ts_st->cc;
00711
00712 *q++ = TS_PACKET_SIZE - 5;
00713 *q++ = 0x10;
00714
00715
00716 q += write_pcr_bits(q, get_pcr(ts, s->pb));
00717
00718
00719 memset(q, 0xFF, TS_PACKET_SIZE - (q - buf));
00720 avio_write(s->pb, buf, TS_PACKET_SIZE);
00721 }
00722
00723 static void write_pts(uint8_t *q, int fourbits, int64_t pts)
00724 {
00725 int val;
00726
00727 val = fourbits << 4 | (((pts >> 30) & 0x07) << 1) | 1;
00728 *q++ = val;
00729 val = (((pts >> 15) & 0x7fff) << 1) | 1;
00730 *q++ = val >> 8;
00731 *q++ = val;
00732 val = (((pts) & 0x7fff) << 1) | 1;
00733 *q++ = val >> 8;
00734 *q++ = val;
00735 }
00736
00737
00738 static void set_af_flag(uint8_t *pkt, int flag)
00739 {
00740
00741 assert(flag);
00742
00743 if ((pkt[3] & 0x20) == 0) {
00744
00745 pkt[3] |= 0x20;
00746
00747 pkt[4] = 1;
00748 pkt[5] = 0;
00749 }
00750 pkt[5] |= flag;
00751 }
00752
00753
00754 static void extend_af(uint8_t *pkt, int size)
00755 {
00756
00757 assert(pkt[3] & 0x20);
00758 pkt[4] += size;
00759 }
00760
00761
00762 static uint8_t *get_ts_payload_start(uint8_t *pkt)
00763 {
00764 if (pkt[3] & 0x20)
00765 return pkt + 5 + pkt[4];
00766 else
00767 return pkt + 4;
00768 }
00769
00770
00771
00772
00773
00774
00775 static void mpegts_write_pes(AVFormatContext *s, AVStream *st,
00776 const uint8_t *payload, int payload_size,
00777 int64_t pts, int64_t dts, int key)
00778 {
00779 MpegTSWriteStream *ts_st = st->priv_data;
00780 MpegTSWrite *ts = s->priv_data;
00781 uint8_t buf[TS_PACKET_SIZE];
00782 uint8_t *q;
00783 int val, is_start, len, header_len, write_pcr, private_code, flags;
00784 int afc_len, stuffing_len;
00785 int64_t pcr = -1;
00786 int64_t delay = av_rescale(s->max_delay, 90000, AV_TIME_BASE);
00787
00788 is_start = 1;
00789 while (payload_size > 0) {
00790 retransmit_si_info(s);
00791
00792 write_pcr = 0;
00793 if (ts_st->pid == ts_st->service->pcr_pid) {
00794 if (ts->mux_rate > 1 || is_start)
00795 ts_st->service->pcr_packet_count++;
00796 if (ts_st->service->pcr_packet_count >=
00797 ts_st->service->pcr_packet_period) {
00798 ts_st->service->pcr_packet_count = 0;
00799 write_pcr = 1;
00800 }
00801 }
00802
00803 if (ts->mux_rate > 1 && dts != AV_NOPTS_VALUE &&
00804 (dts - get_pcr(ts, s->pb)/300) > delay) {
00805
00806 if (write_pcr)
00807 mpegts_insert_pcr_only(s, st);
00808 else
00809 mpegts_insert_null_packet(s);
00810 continue;
00811 }
00812
00813
00814 q = buf;
00815 *q++ = 0x47;
00816 val = (ts_st->pid >> 8);
00817 if (is_start)
00818 val |= 0x40;
00819 *q++ = val;
00820 *q++ = ts_st->pid;
00821 ts_st->cc = (ts_st->cc + 1) & 0xf;
00822 *q++ = 0x10 | ts_st->cc;
00823 if (key && is_start && pts != AV_NOPTS_VALUE) {
00824
00825 if (ts_st->pid == ts_st->service->pcr_pid)
00826 write_pcr = 1;
00827 set_af_flag(buf, 0x40);
00828 q = get_ts_payload_start(buf);
00829 }
00830 if (write_pcr) {
00831 set_af_flag(buf, 0x10);
00832 q = get_ts_payload_start(buf);
00833
00834 if (ts->mux_rate > 1)
00835 pcr = get_pcr(ts, s->pb);
00836 else
00837 pcr = (dts - delay)*300;
00838 if (dts != AV_NOPTS_VALUE && dts < pcr / 300)
00839 av_log(s, AV_LOG_WARNING, "dts < pcr, TS is invalid\n");
00840 extend_af(buf, write_pcr_bits(q, pcr));
00841 q = get_ts_payload_start(buf);
00842 }
00843 if (is_start) {
00844 int pes_extension = 0;
00845
00846 *q++ = 0x00;
00847 *q++ = 0x00;
00848 *q++ = 0x01;
00849 private_code = 0;
00850 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
00851 if (st->codec->codec_id == CODEC_ID_DIRAC) {
00852 *q++ = 0xfd;
00853 } else
00854 *q++ = 0xe0;
00855 } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
00856 (st->codec->codec_id == CODEC_ID_MP2 ||
00857 st->codec->codec_id == CODEC_ID_MP3 ||
00858 st->codec->codec_id == CODEC_ID_AAC)) {
00859 *q++ = 0xc0;
00860 } else {
00861 *q++ = 0xbd;
00862 if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE) {
00863 private_code = 0x20;
00864 }
00865 }
00866 header_len = 0;
00867 flags = 0;
00868 if (pts != AV_NOPTS_VALUE) {
00869 header_len += 5;
00870 flags |= 0x80;
00871 }
00872 if (dts != AV_NOPTS_VALUE && pts != AV_NOPTS_VALUE && dts != pts) {
00873 header_len += 5;
00874 flags |= 0x40;
00875 }
00876 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO &&
00877 st->codec->codec_id == CODEC_ID_DIRAC) {
00878
00879 pes_extension = 1;
00880 flags |= 0x01;
00881
00882
00883
00884
00885
00886
00887 header_len += 3;
00888 }
00889 len = payload_size + header_len + 3;
00890 if (private_code != 0)
00891 len++;
00892 if (len > 0xffff)
00893 len = 0;
00894 *q++ = len >> 8;
00895 *q++ = len;
00896 val = 0x80;
00897
00898 if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE)
00899 val |= 0x04;
00900 *q++ = val;
00901 *q++ = flags;
00902 *q++ = header_len;
00903 if (pts != AV_NOPTS_VALUE) {
00904 write_pts(q, flags >> 6, pts);
00905 q += 5;
00906 }
00907 if (dts != AV_NOPTS_VALUE && pts != AV_NOPTS_VALUE && dts != pts) {
00908 write_pts(q, 1, dts);
00909 q += 5;
00910 }
00911 if (pes_extension && st->codec->codec_id == CODEC_ID_DIRAC) {
00912 flags = 0x01;
00913 *q++ = flags;
00914 *q++ = 0x80 | 0x01;
00915
00916
00917
00918
00919 *q++ = 0x00 | 0x60;
00920 }
00921 if (private_code != 0)
00922 *q++ = private_code;
00923 is_start = 0;
00924 }
00925
00926 header_len = q - buf;
00927
00928 len = TS_PACKET_SIZE - header_len;
00929 if (len > payload_size)
00930 len = payload_size;
00931 stuffing_len = TS_PACKET_SIZE - header_len - len;
00932 if (stuffing_len > 0) {
00933
00934 if (buf[3] & 0x20) {
00935
00936 afc_len = buf[4] + 1;
00937 memmove(buf + 4 + afc_len + stuffing_len,
00938 buf + 4 + afc_len,
00939 header_len - (4 + afc_len));
00940 buf[4] += stuffing_len;
00941 memset(buf + 4 + afc_len, 0xff, stuffing_len);
00942 } else {
00943
00944 memmove(buf + 4 + stuffing_len, buf + 4, header_len - 4);
00945 buf[3] |= 0x20;
00946 buf[4] = stuffing_len - 1;
00947 if (stuffing_len >= 2) {
00948 buf[5] = 0x00;
00949 memset(buf + 6, 0xff, stuffing_len - 2);
00950 }
00951 }
00952 }
00953 memcpy(buf + TS_PACKET_SIZE - len, payload, len);
00954 payload += len;
00955 payload_size -= len;
00956 avio_write(s->pb, buf, TS_PACKET_SIZE);
00957 }
00958 avio_flush(s->pb);
00959 }
00960
00961 static int mpegts_write_packet(AVFormatContext *s, AVPacket *pkt)
00962 {
00963 AVStream *st = s->streams[pkt->stream_index];
00964 int size = pkt->size;
00965 uint8_t *buf= pkt->data;
00966 uint8_t *data= NULL;
00967 MpegTSWrite *ts = s->priv_data;
00968 MpegTSWriteStream *ts_st = st->priv_data;
00969 const uint64_t delay = av_rescale(s->max_delay, 90000, AV_TIME_BASE)*2;
00970 int64_t dts = AV_NOPTS_VALUE, pts = AV_NOPTS_VALUE;
00971
00972 if (pkt->pts != AV_NOPTS_VALUE)
00973 pts = pkt->pts + delay;
00974 if (pkt->dts != AV_NOPTS_VALUE)
00975 dts = pkt->dts + delay;
00976
00977 if (ts_st->first_pts_check && pts == AV_NOPTS_VALUE) {
00978 av_log(s, AV_LOG_ERROR, "first pts value must set\n");
00979 return -1;
00980 }
00981 ts_st->first_pts_check = 0;
00982
00983 if (st->codec->codec_id == CODEC_ID_H264) {
00984 const uint8_t *p = buf, *buf_end = p+size;
00985 uint32_t state = -1;
00986
00987 if (pkt->size < 5 || AV_RB32(pkt->data) != 0x0000001) {
00988 av_log(s, AV_LOG_ERROR, "H.264 bitstream malformed, "
00989 "no startcode found, use -vbsf h264_mp4toannexb\n");
00990 return -1;
00991 }
00992
00993 do {
00994 p = avpriv_mpv_find_start_code(p, buf_end, &state);
00995
00996 } while (p < buf_end && (state & 0x1f) != 9 &&
00997 (state & 0x1f) != 5 && (state & 0x1f) != 1);
00998
00999 if ((state & 0x1f) != 9) {
01000 data = av_malloc(pkt->size+6);
01001 if (!data)
01002 return -1;
01003 memcpy(data+6, pkt->data, pkt->size);
01004 AV_WB32(data, 0x00000001);
01005 data[4] = 0x09;
01006 data[5] = 0xf0;
01007 buf = data;
01008 size = pkt->size+6;
01009 }
01010 } else if (st->codec->codec_id == CODEC_ID_AAC) {
01011 if (pkt->size < 2)
01012 return -1;
01013 if ((AV_RB16(pkt->data) & 0xfff0) != 0xfff0) {
01014 ADTSContext *adts = ts_st->adts;
01015 int new_size, err;
01016 if (!adts) {
01017 av_log(s, AV_LOG_ERROR, "aac bitstream not in adts format "
01018 "and extradata missing\n");
01019 return -1;
01020 }
01021 new_size = ADTS_HEADER_SIZE+adts->pce_size+pkt->size;
01022 if ((unsigned)new_size >= INT_MAX)
01023 return -1;
01024 data = av_malloc(new_size);
01025 if (!data)
01026 return AVERROR(ENOMEM);
01027 err = ff_adts_write_frame_header(adts, data, pkt->size,
01028 adts->pce_size);
01029 if (err < 0) {
01030 av_free(data);
01031 return err;
01032 }
01033 if (adts->pce_size) {
01034 memcpy(data+ADTS_HEADER_SIZE, adts->pce_data, adts->pce_size);
01035 adts->pce_size = 0;
01036 }
01037 memcpy(data+ADTS_HEADER_SIZE+adts->pce_size, pkt->data, pkt->size);
01038 buf = data;
01039 size = new_size;
01040 }
01041 }
01042
01043 if (st->codec->codec_type != AVMEDIA_TYPE_AUDIO) {
01044
01045 mpegts_write_pes(s, st, buf, size, pts, dts, pkt->flags & AV_PKT_FLAG_KEY);
01046 av_free(data);
01047 return 0;
01048 }
01049
01050 if (ts_st->payload_size + size > ts->pes_payload_size) {
01051 if (ts_st->payload_size) {
01052 mpegts_write_pes(s, st, ts_st->payload, ts_st->payload_size,
01053 ts_st->payload_pts, ts_st->payload_dts,
01054 ts_st->payload_flags & AV_PKT_FLAG_KEY);
01055 ts_st->payload_size = 0;
01056 }
01057 if (size > ts->pes_payload_size) {
01058 mpegts_write_pes(s, st, buf, size, pts, dts,
01059 pkt->flags & AV_PKT_FLAG_KEY);
01060 av_free(data);
01061 return 0;
01062 }
01063 }
01064
01065 if (!ts_st->payload_size) {
01066 ts_st->payload_pts = pts;
01067 ts_st->payload_dts = dts;
01068 ts_st->payload_flags = pkt->flags;
01069 }
01070
01071 memcpy(ts_st->payload + ts_st->payload_size, buf, size);
01072 ts_st->payload_size += size;
01073
01074 av_free(data);
01075
01076 return 0;
01077 }
01078
01079 static int mpegts_write_end(AVFormatContext *s)
01080 {
01081 MpegTSWrite *ts = s->priv_data;
01082 MpegTSWriteStream *ts_st;
01083 MpegTSService *service;
01084 AVStream *st;
01085 int i;
01086
01087
01088 for(i = 0; i < s->nb_streams; i++) {
01089 st = s->streams[i];
01090 ts_st = st->priv_data;
01091 if (ts_st->payload_size > 0) {
01092 mpegts_write_pes(s, st, ts_st->payload, ts_st->payload_size,
01093 ts_st->payload_pts, ts_st->payload_dts,
01094 ts_st->payload_flags & AV_PKT_FLAG_KEY);
01095 }
01096 av_freep(&ts_st->payload);
01097 av_freep(&ts_st->adts);
01098 }
01099 avio_flush(s->pb);
01100
01101 for(i = 0; i < ts->nb_services; i++) {
01102 service = ts->services[i];
01103 av_freep(&service->provider_name);
01104 av_freep(&service->name);
01105 av_free(service);
01106 }
01107 av_free(ts->services);
01108
01109 return 0;
01110 }
01111
01112 AVOutputFormat ff_mpegts_muxer = {
01113 .name = "mpegts",
01114 .long_name = NULL_IF_CONFIG_SMALL("MPEG-2 transport stream format"),
01115 .mime_type = "video/x-mpegts",
01116 .extensions = "ts,m2t",
01117 .priv_data_size = sizeof(MpegTSWrite),
01118 .audio_codec = CODEC_ID_MP2,
01119 .video_codec = CODEC_ID_MPEG2VIDEO,
01120 .write_header = mpegts_write_header,
01121 .write_packet = mpegts_write_packet,
01122 .write_trailer = mpegts_write_end,
01123 .priv_class = &mpegts_muxer_class,
01124 };