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00022 #include "libavutil/bswap.h"
00023 #include "libavutil/crc.h"
00024 #include "libavutil/opt.h"
00025 #include "libavcodec/mpegvideo.h"
00026 #include "avformat.h"
00027 #include "internal.h"
00028 #include "mpegts.h"
00029 #include "adts.h"
00030
00031 #define PCR_TIME_BASE 27000000
00032
00033
00034
00035
00036
00037
00038 typedef struct MpegTSSection {
00039 int pid;
00040 int cc;
00041 void (*write_packet)(struct MpegTSSection *s, const uint8_t *packet);
00042 void *opaque;
00043 } MpegTSSection;
00044
00045 typedef struct MpegTSService {
00046 MpegTSSection pmt;
00047 int sid;
00048 char *name;
00049 char *provider_name;
00050 int pcr_pid;
00051 int pcr_packet_count;
00052 int pcr_packet_period;
00053 } MpegTSService;
00054
00055 typedef struct MpegTSWrite {
00056 MpegTSSection pat;
00057 MpegTSSection sdt;
00058 MpegTSService **services;
00059 int sdt_packet_count;
00060 int sdt_packet_period;
00061 int pat_packet_count;
00062 int pat_packet_period;
00063 int nb_services;
00064 int onid;
00065 int tsid;
00066 int64_t first_pcr;
00067 int mux_rate;
00068
00069 int transport_stream_id;
00070 int original_network_id;
00071 int service_id;
00072
00073 int pmt_start_pid;
00074 int start_pid;
00075 } MpegTSWrite;
00076
00077 static const AVOption options[] = {
00078 { "mpegts_transport_stream_id", "Set transport_stream_id field.",
00079 offsetof(MpegTSWrite, transport_stream_id), FF_OPT_TYPE_INT, 0x0001, 0x0001, 0xffff, AV_OPT_FLAG_ENCODING_PARAM},
00080 { "mpegts_original_network_id", "Set original_network_id field.",
00081 offsetof(MpegTSWrite, original_network_id), FF_OPT_TYPE_INT, 0x0001, 0x0001, 0xffff, AV_OPT_FLAG_ENCODING_PARAM},
00082 { "mpegts_service_id", "Set service_id field.",
00083 offsetof(MpegTSWrite, service_id), FF_OPT_TYPE_INT, 0x0001, 0x0001, 0xffff, AV_OPT_FLAG_ENCODING_PARAM},
00084 { "mpegts_pmt_start_pid", "Set the first pid of the PMT.",
00085 offsetof(MpegTSWrite, pmt_start_pid), FF_OPT_TYPE_INT, 0x1000, 0x1000, 0x1f00, AV_OPT_FLAG_ENCODING_PARAM},
00086 { "mpegts_start_pid", "Set the first pid.",
00087 offsetof(MpegTSWrite, start_pid), FF_OPT_TYPE_INT, 0x0100, 0x0100, 0x0f00, AV_OPT_FLAG_ENCODING_PARAM},
00088 { NULL },
00089 };
00090
00091 static const AVClass mpegts_muxer_class = {
00092 "MPEGTS muxer",
00093 av_default_item_name,
00094 options,
00095 LIBAVUTIL_VERSION_INT,
00096 };
00097
00098
00099 static void mpegts_write_section(MpegTSSection *s, uint8_t *buf, int len)
00100 {
00101 unsigned int crc;
00102 unsigned char packet[TS_PACKET_SIZE];
00103 const unsigned char *buf_ptr;
00104 unsigned char *q;
00105 int first, b, len1, left;
00106
00107 crc = av_bswap32(av_crc(av_crc_get_table(AV_CRC_32_IEEE), -1, buf, len - 4));
00108 buf[len - 4] = (crc >> 24) & 0xff;
00109 buf[len - 3] = (crc >> 16) & 0xff;
00110 buf[len - 2] = (crc >> 8) & 0xff;
00111 buf[len - 1] = (crc) & 0xff;
00112
00113
00114 buf_ptr = buf;
00115 while (len > 0) {
00116 first = (buf == buf_ptr);
00117 q = packet;
00118 *q++ = 0x47;
00119 b = (s->pid >> 8);
00120 if (first)
00121 b |= 0x40;
00122 *q++ = b;
00123 *q++ = s->pid;
00124 s->cc = (s->cc + 1) & 0xf;
00125 *q++ = 0x10 | s->cc;
00126 if (first)
00127 *q++ = 0;
00128 len1 = TS_PACKET_SIZE - (q - packet);
00129 if (len1 > len)
00130 len1 = len;
00131 memcpy(q, buf_ptr, len1);
00132 q += len1;
00133
00134 left = TS_PACKET_SIZE - (q - packet);
00135 if (left > 0)
00136 memset(q, 0xff, left);
00137
00138 s->write_packet(s, packet);
00139
00140 buf_ptr += len1;
00141 len -= len1;
00142 }
00143 }
00144
00145 static inline void put16(uint8_t **q_ptr, int val)
00146 {
00147 uint8_t *q;
00148 q = *q_ptr;
00149 *q++ = val >> 8;
00150 *q++ = val;
00151 *q_ptr = q;
00152 }
00153
00154 static int mpegts_write_section1(MpegTSSection *s, int tid, int id,
00155 int version, int sec_num, int last_sec_num,
00156 uint8_t *buf, int len)
00157 {
00158 uint8_t section[1024], *q;
00159 unsigned int tot_len;
00160
00161 unsigned int flags = tid == SDT_TID ? 0xf000 : 0xb000;
00162
00163 tot_len = 3 + 5 + len + 4;
00164
00165 if (tot_len > 1024)
00166 return -1;
00167
00168 q = section;
00169 *q++ = tid;
00170 put16(&q, flags | (len + 5 + 4));
00171 put16(&q, id);
00172 *q++ = 0xc1 | (version << 1);
00173 *q++ = sec_num;
00174 *q++ = last_sec_num;
00175 memcpy(q, buf, len);
00176
00177 mpegts_write_section(s, section, tot_len);
00178 return 0;
00179 }
00180
00181
00182
00183
00184 #define DEFAULT_PROVIDER_NAME "FFmpeg"
00185 #define DEFAULT_SERVICE_NAME "Service01"
00186
00187
00188 #define DEFAULT_PES_HEADER_FREQ 16
00189 #define DEFAULT_PES_PAYLOAD_SIZE ((DEFAULT_PES_HEADER_FREQ - 1) * 184 + 170)
00190
00191
00192 #define SDT_RETRANS_TIME 500
00193 #define PAT_RETRANS_TIME 100
00194 #define PCR_RETRANS_TIME 20
00195
00196 typedef struct MpegTSWriteStream {
00197 struct MpegTSService *service;
00198 int pid;
00199 int cc;
00200 int payload_index;
00201 int first_pts_check;
00202 int64_t payload_pts;
00203 int64_t payload_dts;
00204 uint8_t payload[DEFAULT_PES_PAYLOAD_SIZE];
00205 ADTSContext *adts;
00206 } MpegTSWriteStream;
00207
00208 static void mpegts_write_pat(AVFormatContext *s)
00209 {
00210 MpegTSWrite *ts = s->priv_data;
00211 MpegTSService *service;
00212 uint8_t data[1012], *q;
00213 int i;
00214
00215 q = data;
00216 for(i = 0; i < ts->nb_services; i++) {
00217 service = ts->services[i];
00218 put16(&q, service->sid);
00219 put16(&q, 0xe000 | service->pmt.pid);
00220 }
00221 mpegts_write_section1(&ts->pat, PAT_TID, ts->tsid, 0, 0, 0,
00222 data, q - data);
00223 }
00224
00225 static void mpegts_write_pmt(AVFormatContext *s, MpegTSService *service)
00226 {
00227
00228 uint8_t data[1012], *q, *desc_length_ptr, *program_info_length_ptr;
00229 int val, stream_type, i;
00230
00231 q = data;
00232 put16(&q, 0xe000 | service->pcr_pid);
00233
00234 program_info_length_ptr = q;
00235 q += 2;
00236
00237
00238
00239 val = 0xf000 | (q - program_info_length_ptr - 2);
00240 program_info_length_ptr[0] = val >> 8;
00241 program_info_length_ptr[1] = val;
00242
00243 for(i = 0; i < s->nb_streams; i++) {
00244 AVStream *st = s->streams[i];
00245 MpegTSWriteStream *ts_st = st->priv_data;
00246 AVMetadataTag *lang = av_metadata_get(st->metadata, "language", NULL,0);
00247 switch(st->codec->codec_id) {
00248 case CODEC_ID_MPEG1VIDEO:
00249 case CODEC_ID_MPEG2VIDEO:
00250 stream_type = STREAM_TYPE_VIDEO_MPEG2;
00251 break;
00252 case CODEC_ID_MPEG4:
00253 stream_type = STREAM_TYPE_VIDEO_MPEG4;
00254 break;
00255 case CODEC_ID_H264:
00256 stream_type = STREAM_TYPE_VIDEO_H264;
00257 break;
00258 case CODEC_ID_DIRAC:
00259 stream_type = STREAM_TYPE_VIDEO_DIRAC;
00260 break;
00261 case CODEC_ID_MP2:
00262 case CODEC_ID_MP3:
00263 stream_type = STREAM_TYPE_AUDIO_MPEG1;
00264 break;
00265 case CODEC_ID_AAC:
00266 stream_type = STREAM_TYPE_AUDIO_AAC;
00267 break;
00268 case CODEC_ID_AAC_LATM:
00269 stream_type = STREAM_TYPE_AUDIO_AAC_LATM;
00270 break;
00271 case CODEC_ID_AC3:
00272 stream_type = STREAM_TYPE_AUDIO_AC3;
00273 break;
00274 default:
00275 stream_type = STREAM_TYPE_PRIVATE_DATA;
00276 break;
00277 }
00278 *q++ = stream_type;
00279 put16(&q, 0xe000 | ts_st->pid);
00280 desc_length_ptr = q;
00281 q += 2;
00282
00283
00284 switch(st->codec->codec_type) {
00285 case AVMEDIA_TYPE_AUDIO:
00286 if (lang) {
00287 char *p;
00288 char *next = lang->value;
00289 uint8_t *len_ptr;
00290
00291 *q++ = 0x0a;
00292 len_ptr = q++;
00293 *len_ptr = 0;
00294
00295 for (p = lang->value; next && *len_ptr < 255 / 4 * 4; p = next + 1) {
00296 next = strchr(p, ',');
00297 if (strlen(p) != 3 && (!next || next != p + 3))
00298 continue;
00299
00300 *q++ = *p++;
00301 *q++ = *p++;
00302 *q++ = *p++;
00303
00304 if (st->disposition & AV_DISPOSITION_CLEAN_EFFECTS)
00305 *q++ = 0x01;
00306 else if (st->disposition & AV_DISPOSITION_HEARING_IMPAIRED)
00307 *q++ = 0x02;
00308 else if (st->disposition & AV_DISPOSITION_VISUAL_IMPAIRED)
00309 *q++ = 0x03;
00310 else
00311 *q++ = 0;
00312
00313 *len_ptr += 4;
00314 }
00315
00316 if (*len_ptr == 0)
00317 q -= 2;
00318 }
00319 break;
00320 case AVMEDIA_TYPE_SUBTITLE:
00321 {
00322 const char *language;
00323 language = lang && strlen(lang->value)==3 ? lang->value : "eng";
00324 *q++ = 0x59;
00325 *q++ = 8;
00326 *q++ = language[0];
00327 *q++ = language[1];
00328 *q++ = language[2];
00329 *q++ = 0x10;
00330 if(st->codec->extradata_size == 4) {
00331 memcpy(q, st->codec->extradata, 4);
00332 q += 4;
00333 } else {
00334 put16(&q, 1);
00335 put16(&q, 1);
00336 }
00337 }
00338 break;
00339 case AVMEDIA_TYPE_VIDEO:
00340 if (stream_type == STREAM_TYPE_VIDEO_DIRAC) {
00341 *q++ = 0x05;
00342 *q++ = 4;
00343 *q++ = 'd';
00344 *q++ = 'r';
00345 *q++ = 'a';
00346 *q++ = 'c';
00347 }
00348 break;
00349 }
00350
00351 val = 0xf000 | (q - desc_length_ptr - 2);
00352 desc_length_ptr[0] = val >> 8;
00353 desc_length_ptr[1] = val;
00354 }
00355 mpegts_write_section1(&service->pmt, PMT_TID, service->sid, 0, 0, 0,
00356 data, q - data);
00357 }
00358
00359
00360 static void putstr8(uint8_t **q_ptr, const char *str)
00361 {
00362 uint8_t *q;
00363 int len;
00364
00365 q = *q_ptr;
00366 if (!str)
00367 len = 0;
00368 else
00369 len = strlen(str);
00370 *q++ = len;
00371 memcpy(q, str, len);
00372 q += len;
00373 *q_ptr = q;
00374 }
00375
00376 static void mpegts_write_sdt(AVFormatContext *s)
00377 {
00378 MpegTSWrite *ts = s->priv_data;
00379 MpegTSService *service;
00380 uint8_t data[1012], *q, *desc_list_len_ptr, *desc_len_ptr;
00381 int i, running_status, free_ca_mode, val;
00382
00383 q = data;
00384 put16(&q, ts->onid);
00385 *q++ = 0xff;
00386 for(i = 0; i < ts->nb_services; i++) {
00387 service = ts->services[i];
00388 put16(&q, service->sid);
00389 *q++ = 0xfc | 0x00;
00390 desc_list_len_ptr = q;
00391 q += 2;
00392 running_status = 4;
00393 free_ca_mode = 0;
00394
00395
00396 *q++ = 0x48;
00397 desc_len_ptr = q;
00398 q++;
00399 *q++ = 0x01;
00400 putstr8(&q, service->provider_name);
00401 putstr8(&q, service->name);
00402 desc_len_ptr[0] = q - desc_len_ptr - 1;
00403
00404
00405 val = (running_status << 13) | (free_ca_mode << 12) |
00406 (q - desc_list_len_ptr - 2);
00407 desc_list_len_ptr[0] = val >> 8;
00408 desc_list_len_ptr[1] = val;
00409 }
00410 mpegts_write_section1(&ts->sdt, SDT_TID, ts->tsid, 0, 0, 0,
00411 data, q - data);
00412 }
00413
00414 static MpegTSService *mpegts_add_service(MpegTSWrite *ts,
00415 int sid,
00416 const char *provider_name,
00417 const char *name)
00418 {
00419 MpegTSService *service;
00420
00421 service = av_mallocz(sizeof(MpegTSService));
00422 if (!service)
00423 return NULL;
00424 service->pmt.pid = ts->pmt_start_pid + ts->nb_services - 1;
00425 service->sid = sid;
00426 service->provider_name = av_strdup(provider_name);
00427 service->name = av_strdup(name);
00428 service->pcr_pid = 0x1fff;
00429 dynarray_add(&ts->services, &ts->nb_services, service);
00430 return service;
00431 }
00432
00433 static void section_write_packet(MpegTSSection *s, const uint8_t *packet)
00434 {
00435 AVFormatContext *ctx = s->opaque;
00436 avio_write(ctx->pb, packet, TS_PACKET_SIZE);
00437 }
00438
00439 static int mpegts_write_header(AVFormatContext *s)
00440 {
00441 MpegTSWrite *ts = s->priv_data;
00442 MpegTSWriteStream *ts_st;
00443 MpegTSService *service;
00444 AVStream *st, *pcr_st = NULL;
00445 AVMetadataTag *title, *provider;
00446 int i, j;
00447 const char *service_name;
00448 const char *provider_name;
00449 int *pids;
00450
00451 ts->tsid = ts->transport_stream_id;
00452 ts->onid = ts->original_network_id;
00453
00454 title = av_metadata_get(s->metadata, "service_name", NULL, 0);
00455 if (!title)
00456 title = av_metadata_get(s->metadata, "title", NULL, 0);
00457 service_name = title ? title->value : DEFAULT_SERVICE_NAME;
00458 provider = av_metadata_get(s->metadata, "service_provider", NULL, 0);
00459 provider_name = provider ? provider->value : DEFAULT_PROVIDER_NAME;
00460 service = mpegts_add_service(ts, ts->service_id, provider_name, service_name);
00461 service->pmt.write_packet = section_write_packet;
00462 service->pmt.opaque = s;
00463 service->pmt.cc = 15;
00464
00465 ts->pat.pid = PAT_PID;
00466 ts->pat.cc = 15;
00467 ts->pat.write_packet = section_write_packet;
00468 ts->pat.opaque = s;
00469
00470 ts->sdt.pid = SDT_PID;
00471 ts->sdt.cc = 15;
00472 ts->sdt.write_packet = section_write_packet;
00473 ts->sdt.opaque = s;
00474
00475 pids = av_malloc(s->nb_streams * sizeof(*pids));
00476 if (!pids)
00477 return AVERROR(ENOMEM);
00478
00479
00480 for(i = 0;i < s->nb_streams; i++) {
00481 st = s->streams[i];
00482 ts_st = av_mallocz(sizeof(MpegTSWriteStream));
00483 if (!ts_st)
00484 goto fail;
00485 st->priv_data = ts_st;
00486 ts_st->service = service;
00487
00488
00489 if (st->id < 16) {
00490 ts_st->pid = ts->start_pid + i;
00491 } else if (st->id < 0x1FFF) {
00492 ts_st->pid = st->id;
00493 } else {
00494 av_log(s, AV_LOG_ERROR, "Invalid stream id %d, must be less than 8191\n", st->id);
00495 goto fail;
00496 }
00497 if (ts_st->pid == service->pmt.pid) {
00498 av_log(s, AV_LOG_ERROR, "Duplicate stream id %d\n", ts_st->pid);
00499 goto fail;
00500 }
00501 for (j = 0; j < i; j++)
00502 if (pids[j] == ts_st->pid) {
00503 av_log(s, AV_LOG_ERROR, "Duplicate stream id %d\n", ts_st->pid);
00504 goto fail;
00505 }
00506 pids[i] = ts_st->pid;
00507 ts_st->payload_pts = AV_NOPTS_VALUE;
00508 ts_st->payload_dts = AV_NOPTS_VALUE;
00509 ts_st->first_pts_check = 1;
00510 ts_st->cc = 15;
00511
00512 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO &&
00513 service->pcr_pid == 0x1fff) {
00514 service->pcr_pid = ts_st->pid;
00515 pcr_st = st;
00516 }
00517 if (st->codec->codec_id == CODEC_ID_AAC &&
00518 st->codec->extradata_size > 0) {
00519 ts_st->adts = av_mallocz(sizeof(*ts_st->adts));
00520 if (!ts_st->adts)
00521 return AVERROR(ENOMEM);
00522 if (ff_adts_decode_extradata(s, ts_st->adts, st->codec->extradata,
00523 st->codec->extradata_size) < 0)
00524 return -1;
00525 }
00526 }
00527
00528 av_free(pids);
00529
00530
00531 if (service->pcr_pid == 0x1fff && s->nb_streams > 0) {
00532 pcr_st = s->streams[0];
00533 ts_st = pcr_st->priv_data;
00534 service->pcr_pid = ts_st->pid;
00535 }
00536
00537 ts->mux_rate = s->mux_rate ? s->mux_rate : 1;
00538
00539 if (ts->mux_rate > 1) {
00540 service->pcr_packet_period = (ts->mux_rate * PCR_RETRANS_TIME) /
00541 (TS_PACKET_SIZE * 8 * 1000);
00542 ts->sdt_packet_period = (ts->mux_rate * SDT_RETRANS_TIME) /
00543 (TS_PACKET_SIZE * 8 * 1000);
00544 ts->pat_packet_period = (ts->mux_rate * PAT_RETRANS_TIME) /
00545 (TS_PACKET_SIZE * 8 * 1000);
00546
00547 ts->first_pcr = av_rescale(s->max_delay, PCR_TIME_BASE, AV_TIME_BASE);
00548 } else {
00549
00550 ts->sdt_packet_period = 200;
00551 ts->pat_packet_period = 40;
00552 if (pcr_st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
00553 if (!pcr_st->codec->frame_size) {
00554 av_log(s, AV_LOG_WARNING, "frame size not set\n");
00555 service->pcr_packet_period =
00556 pcr_st->codec->sample_rate/(10*512);
00557 } else {
00558 service->pcr_packet_period =
00559 pcr_st->codec->sample_rate/(10*pcr_st->codec->frame_size);
00560 }
00561 } else {
00562
00563 service->pcr_packet_period =
00564 pcr_st->codec->time_base.den/(10*pcr_st->codec->time_base.num);
00565 }
00566 }
00567
00568
00569 service->pcr_packet_count = service->pcr_packet_period;
00570 ts->pat_packet_count = ts->pat_packet_period-1;
00571 ts->sdt_packet_count = ts->sdt_packet_period-1;
00572
00573 if (ts->mux_rate == 1)
00574 av_log(s, AV_LOG_INFO, "muxrate VBR, ");
00575 else
00576 av_log(s, AV_LOG_INFO, "muxrate %d, ", ts->mux_rate);
00577 av_log(s, AV_LOG_INFO, "pcr every %d pkts, "
00578 "sdt every %d, pat/pmt every %d pkts\n",
00579 service->pcr_packet_period,
00580 ts->sdt_packet_period, ts->pat_packet_period);
00581
00582 put_flush_packet(s->pb);
00583
00584 return 0;
00585
00586 fail:
00587 av_free(pids);
00588 for(i = 0;i < s->nb_streams; i++) {
00589 st = s->streams[i];
00590 av_free(st->priv_data);
00591 }
00592 return -1;
00593 }
00594
00595
00596 static void retransmit_si_info(AVFormatContext *s)
00597 {
00598 MpegTSWrite *ts = s->priv_data;
00599 int i;
00600
00601 if (++ts->sdt_packet_count == ts->sdt_packet_period) {
00602 ts->sdt_packet_count = 0;
00603 mpegts_write_sdt(s);
00604 }
00605 if (++ts->pat_packet_count == ts->pat_packet_period) {
00606 ts->pat_packet_count = 0;
00607 mpegts_write_pat(s);
00608 for(i = 0; i < ts->nb_services; i++) {
00609 mpegts_write_pmt(s, ts->services[i]);
00610 }
00611 }
00612 }
00613
00614 static int64_t get_pcr(const MpegTSWrite *ts, AVIOContext *pb)
00615 {
00616 return av_rescale(avio_tell(pb) + 11, 8 * PCR_TIME_BASE, ts->mux_rate) +
00617 ts->first_pcr;
00618 }
00619
00620 static uint8_t* write_pcr_bits(uint8_t *buf, int64_t pcr)
00621 {
00622 int64_t pcr_low = pcr % 300, pcr_high = pcr / 300;
00623
00624 *buf++ = pcr_high >> 25;
00625 *buf++ = pcr_high >> 17;
00626 *buf++ = pcr_high >> 9;
00627 *buf++ = pcr_high >> 1;
00628 *buf++ = pcr_high << 7 | pcr_low >> 8 | 0x7e;
00629 *buf++ = pcr_low;
00630
00631 return buf;
00632 }
00633
00634
00635 static void mpegts_insert_null_packet(AVFormatContext *s)
00636 {
00637 uint8_t *q;
00638 uint8_t buf[TS_PACKET_SIZE];
00639
00640 q = buf;
00641 *q++ = 0x47;
00642 *q++ = 0x00 | 0x1f;
00643 *q++ = 0xff;
00644 *q++ = 0x10;
00645 memset(q, 0x0FF, TS_PACKET_SIZE - (q - buf));
00646 avio_write(s->pb, buf, TS_PACKET_SIZE);
00647 }
00648
00649
00650 static void mpegts_insert_pcr_only(AVFormatContext *s, AVStream *st)
00651 {
00652 MpegTSWrite *ts = s->priv_data;
00653 MpegTSWriteStream *ts_st = st->priv_data;
00654 uint8_t *q;
00655 uint8_t buf[TS_PACKET_SIZE];
00656
00657 q = buf;
00658 *q++ = 0x47;
00659 *q++ = ts_st->pid >> 8;
00660 *q++ = ts_st->pid;
00661 *q++ = 0x20 | ts_st->cc;
00662
00663 *q++ = TS_PACKET_SIZE - 5;
00664 *q++ = 0x10;
00665
00666
00667 q = write_pcr_bits(q, get_pcr(ts, s->pb));
00668
00669
00670 memset(q, 0xFF, TS_PACKET_SIZE - (q - buf));
00671 avio_write(s->pb, buf, TS_PACKET_SIZE);
00672 }
00673
00674 static void write_pts(uint8_t *q, int fourbits, int64_t pts)
00675 {
00676 int val;
00677
00678 val = fourbits << 4 | (((pts >> 30) & 0x07) << 1) | 1;
00679 *q++ = val;
00680 val = (((pts >> 15) & 0x7fff) << 1) | 1;
00681 *q++ = val >> 8;
00682 *q++ = val;
00683 val = (((pts) & 0x7fff) << 1) | 1;
00684 *q++ = val >> 8;
00685 *q++ = val;
00686 }
00687
00688
00689
00690
00691
00692
00693 static void mpegts_write_pes(AVFormatContext *s, AVStream *st,
00694 const uint8_t *payload, int payload_size,
00695 int64_t pts, int64_t dts)
00696 {
00697 MpegTSWriteStream *ts_st = st->priv_data;
00698 MpegTSWrite *ts = s->priv_data;
00699 uint8_t buf[TS_PACKET_SIZE];
00700 uint8_t *q;
00701 int val, is_start, len, header_len, write_pcr, private_code, flags;
00702 int afc_len, stuffing_len;
00703 int64_t pcr = -1;
00704 int64_t delay = av_rescale(s->max_delay, 90000, AV_TIME_BASE);
00705
00706 is_start = 1;
00707 while (payload_size > 0) {
00708 retransmit_si_info(s);
00709
00710 write_pcr = 0;
00711 if (ts_st->pid == ts_st->service->pcr_pid) {
00712 if (ts->mux_rate > 1 || is_start)
00713 ts_st->service->pcr_packet_count++;
00714 if (ts_st->service->pcr_packet_count >=
00715 ts_st->service->pcr_packet_period) {
00716 ts_st->service->pcr_packet_count = 0;
00717 write_pcr = 1;
00718 }
00719 }
00720
00721 if (ts->mux_rate > 1 && dts != AV_NOPTS_VALUE &&
00722 (dts - get_pcr(ts, s->pb)/300) > delay) {
00723
00724 if (write_pcr)
00725 mpegts_insert_pcr_only(s, st);
00726 else
00727 mpegts_insert_null_packet(s);
00728 continue;
00729 }
00730
00731
00732 q = buf;
00733 *q++ = 0x47;
00734 val = (ts_st->pid >> 8);
00735 if (is_start)
00736 val |= 0x40;
00737 *q++ = val;
00738 *q++ = ts_st->pid;
00739 ts_st->cc = (ts_st->cc + 1) & 0xf;
00740 *q++ = 0x10 | ts_st->cc | (write_pcr ? 0x20 : 0);
00741 if (write_pcr) {
00742
00743 if (ts->mux_rate > 1)
00744 pcr = get_pcr(ts, s->pb);
00745 else
00746 pcr = (dts - delay)*300;
00747 if (dts != AV_NOPTS_VALUE && dts < pcr / 300)
00748 av_log(s, AV_LOG_WARNING, "dts < pcr, TS is invalid\n");
00749 *q++ = 7;
00750 *q++ = 0x10;
00751 q = write_pcr_bits(q, pcr);
00752 }
00753 if (is_start) {
00754 int pes_extension = 0;
00755
00756 *q++ = 0x00;
00757 *q++ = 0x00;
00758 *q++ = 0x01;
00759 private_code = 0;
00760 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
00761 if (st->codec->codec_id == CODEC_ID_DIRAC) {
00762 *q++ = 0xfd;
00763 } else
00764 *q++ = 0xe0;
00765 } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
00766 (st->codec->codec_id == CODEC_ID_MP2 ||
00767 st->codec->codec_id == CODEC_ID_MP3 ||
00768 st->codec->codec_id == CODEC_ID_AAC)) {
00769 *q++ = 0xc0;
00770 } else {
00771 *q++ = 0xbd;
00772 if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE) {
00773 private_code = 0x20;
00774 }
00775 }
00776 header_len = 0;
00777 flags = 0;
00778 if (pts != AV_NOPTS_VALUE) {
00779 header_len += 5;
00780 flags |= 0x80;
00781 }
00782 if (dts != AV_NOPTS_VALUE && pts != AV_NOPTS_VALUE && dts != pts) {
00783 header_len += 5;
00784 flags |= 0x40;
00785 }
00786 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO &&
00787 st->codec->codec_id == CODEC_ID_DIRAC) {
00788
00789 pes_extension = 1;
00790 flags |= 0x01;
00791
00792
00793
00794
00795
00796
00797 header_len += 3;
00798 }
00799 len = payload_size + header_len + 3;
00800 if (private_code != 0)
00801 len++;
00802 if (len > 0xffff)
00803 len = 0;
00804 *q++ = len >> 8;
00805 *q++ = len;
00806 val = 0x80;
00807
00808 if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE)
00809 val |= 0x04;
00810 *q++ = val;
00811 *q++ = flags;
00812 *q++ = header_len;
00813 if (pts != AV_NOPTS_VALUE) {
00814 write_pts(q, flags >> 6, pts);
00815 q += 5;
00816 }
00817 if (dts != AV_NOPTS_VALUE && pts != AV_NOPTS_VALUE && dts != pts) {
00818 write_pts(q, 1, dts);
00819 q += 5;
00820 }
00821 if (pes_extension && st->codec->codec_id == CODEC_ID_DIRAC) {
00822 flags = 0x01;
00823 *q++ = flags;
00824 *q++ = 0x80 | 0x01;
00825
00826
00827
00828
00829 *q++ = 0x00 | 0x60;
00830 }
00831 if (private_code != 0)
00832 *q++ = private_code;
00833 is_start = 0;
00834 }
00835
00836 header_len = q - buf;
00837
00838 len = TS_PACKET_SIZE - header_len;
00839 if (len > payload_size)
00840 len = payload_size;
00841 stuffing_len = TS_PACKET_SIZE - header_len - len;
00842 if (stuffing_len > 0) {
00843
00844 if (buf[3] & 0x20) {
00845
00846 afc_len = buf[4] + 1;
00847 memmove(buf + 4 + afc_len + stuffing_len,
00848 buf + 4 + afc_len,
00849 header_len - (4 + afc_len));
00850 buf[4] += stuffing_len;
00851 memset(buf + 4 + afc_len, 0xff, stuffing_len);
00852 } else {
00853
00854 memmove(buf + 4 + stuffing_len, buf + 4, header_len - 4);
00855 buf[3] |= 0x20;
00856 buf[4] = stuffing_len - 1;
00857 if (stuffing_len >= 2) {
00858 buf[5] = 0x00;
00859 memset(buf + 6, 0xff, stuffing_len - 2);
00860 }
00861 }
00862 }
00863 memcpy(buf + TS_PACKET_SIZE - len, payload, len);
00864 payload += len;
00865 payload_size -= len;
00866 avio_write(s->pb, buf, TS_PACKET_SIZE);
00867 }
00868 put_flush_packet(s->pb);
00869 }
00870
00871 static int mpegts_write_packet(AVFormatContext *s, AVPacket *pkt)
00872 {
00873 AVStream *st = s->streams[pkt->stream_index];
00874 int size = pkt->size;
00875 uint8_t *buf= pkt->data;
00876 uint8_t *data= NULL;
00877 MpegTSWriteStream *ts_st = st->priv_data;
00878 const uint64_t delay = av_rescale(s->max_delay, 90000, AV_TIME_BASE)*2;
00879 int64_t dts = AV_NOPTS_VALUE, pts = AV_NOPTS_VALUE;
00880
00881 if (pkt->pts != AV_NOPTS_VALUE)
00882 pts = pkt->pts + delay;
00883 if (pkt->dts != AV_NOPTS_VALUE)
00884 dts = pkt->dts + delay;
00885
00886 if (ts_st->first_pts_check && pts == AV_NOPTS_VALUE) {
00887 av_log(s, AV_LOG_ERROR, "first pts value must set\n");
00888 return -1;
00889 }
00890 ts_st->first_pts_check = 0;
00891
00892 if (st->codec->codec_id == CODEC_ID_H264) {
00893 const uint8_t *p = buf, *buf_end = p+size;
00894 uint32_t state = -1;
00895
00896 if (pkt->size < 5 || AV_RB32(pkt->data) != 0x0000001) {
00897 av_log(s, AV_LOG_ERROR, "h264 bitstream malformated, "
00898 "no startcode found, use -vbsf h264_mp4toannexb\n");
00899 return -1;
00900 }
00901
00902 do {
00903 p = ff_find_start_code(p, buf_end, &state);
00904
00905 } while (p < buf_end && (state & 0x1f) != 9 &&
00906 (state & 0x1f) != 5 && (state & 0x1f) != 1);
00907
00908 if ((state & 0x1f) != 9) {
00909 data = av_malloc(pkt->size+6);
00910 if (!data)
00911 return -1;
00912 memcpy(data+6, pkt->data, pkt->size);
00913 AV_WB32(data, 0x00000001);
00914 data[4] = 0x09;
00915 data[5] = 0xf0;
00916 buf = data;
00917 size = pkt->size+6;
00918 }
00919 } else if (st->codec->codec_id == CODEC_ID_AAC) {
00920 if (pkt->size < 2)
00921 return -1;
00922 if ((AV_RB16(pkt->data) & 0xfff0) != 0xfff0) {
00923 ADTSContext *adts = ts_st->adts;
00924 int new_size;
00925 if (!adts) {
00926 av_log(s, AV_LOG_ERROR, "aac bitstream not in adts format "
00927 "and extradata missing\n");
00928 return -1;
00929 }
00930 new_size = ADTS_HEADER_SIZE+adts->pce_size+pkt->size;
00931 if ((unsigned)new_size >= INT_MAX)
00932 return -1;
00933 data = av_malloc(new_size);
00934 if (!data)
00935 return AVERROR(ENOMEM);
00936 ff_adts_write_frame_header(adts, data, pkt->size, adts->pce_size);
00937 if (adts->pce_size) {
00938 memcpy(data+ADTS_HEADER_SIZE, adts->pce_data, adts->pce_size);
00939 adts->pce_size = 0;
00940 }
00941 memcpy(data+ADTS_HEADER_SIZE+adts->pce_size, pkt->data, pkt->size);
00942 buf = data;
00943 size = new_size;
00944 }
00945 }
00946
00947 if (st->codec->codec_type != AVMEDIA_TYPE_AUDIO) {
00948
00949 mpegts_write_pes(s, st, buf, size, pts, dts);
00950 av_free(data);
00951 return 0;
00952 }
00953
00954 if (ts_st->payload_index + size > DEFAULT_PES_PAYLOAD_SIZE) {
00955 mpegts_write_pes(s, st, ts_st->payload, ts_st->payload_index,
00956 ts_st->payload_pts, ts_st->payload_dts);
00957 ts_st->payload_index = 0;
00958 }
00959
00960 if (!ts_st->payload_index) {
00961 ts_st->payload_pts = pts;
00962 ts_st->payload_dts = dts;
00963 }
00964
00965 memcpy(ts_st->payload + ts_st->payload_index, buf, size);
00966 ts_st->payload_index += size;
00967
00968 av_free(data);
00969
00970 return 0;
00971 }
00972
00973 static int mpegts_write_end(AVFormatContext *s)
00974 {
00975 MpegTSWrite *ts = s->priv_data;
00976 MpegTSWriteStream *ts_st;
00977 MpegTSService *service;
00978 AVStream *st;
00979 int i;
00980
00981
00982 for(i = 0; i < s->nb_streams; i++) {
00983 st = s->streams[i];
00984 ts_st = st->priv_data;
00985 if (ts_st->payload_index > 0) {
00986 mpegts_write_pes(s, st, ts_st->payload, ts_st->payload_index,
00987 ts_st->payload_pts, ts_st->payload_dts);
00988 }
00989 av_freep(&ts_st->adts);
00990 }
00991 put_flush_packet(s->pb);
00992
00993 for(i = 0; i < ts->nb_services; i++) {
00994 service = ts->services[i];
00995 av_freep(&service->provider_name);
00996 av_freep(&service->name);
00997 av_free(service);
00998 }
00999 av_free(ts->services);
01000
01001 return 0;
01002 }
01003
01004 AVOutputFormat ff_mpegts_muxer = {
01005 "mpegts",
01006 NULL_IF_CONFIG_SMALL("MPEG-2 transport stream format"),
01007 "video/x-mpegts",
01008 "ts,m2t",
01009 sizeof(MpegTSWrite),
01010 CODEC_ID_MP2,
01011 CODEC_ID_MPEG2VIDEO,
01012 mpegts_write_header,
01013 mpegts_write_packet,
01014 mpegts_write_end,
01015 .priv_class = &mpegts_muxer_class,
01016 };