00001
00002
00003
00004
00005
00006
00007
00008
00009
00010
00011
00012
00013
00014
00015
00016
00017
00018
00019
00020
00021
00022
00023
00024 #include "libavutil/crc.h"
00025 #include "libavutil/intreadwrite.h"
00026 #include "libavutil/log.h"
00027 #include "libavutil/dict.h"
00028 #include "libavutil/mathematics.h"
00029 #include "libavutil/opt.h"
00030 #include "libavcodec/bytestream.h"
00031 #include "libavcodec/get_bits.h"
00032 #include "avformat.h"
00033 #include "mpegts.h"
00034 #include "internal.h"
00035 #include "avio_internal.h"
00036 #include "seek.h"
00037 #include "mpeg.h"
00038 #include "isom.h"
00039
00040
00041
00042 #define MAX_RESYNC_SIZE 65536
00043
00044 #define MAX_PES_PAYLOAD 200*1024
00045
00046 #define MAX_MP4_DESCR_COUNT 16
00047
00048 enum MpegTSFilterType {
00049 MPEGTS_PES,
00050 MPEGTS_SECTION,
00051 };
00052
00053 typedef struct MpegTSFilter MpegTSFilter;
00054
00055 typedef int PESCallback(MpegTSFilter *f, const uint8_t *buf, int len, int is_start, int64_t pos);
00056
00057 typedef struct MpegTSPESFilter {
00058 PESCallback *pes_cb;
00059 void *opaque;
00060 } MpegTSPESFilter;
00061
00062 typedef void SectionCallback(MpegTSFilter *f, const uint8_t *buf, int len);
00063
00064 typedef void SetServiceCallback(void *opaque, int ret);
00065
00066 typedef struct MpegTSSectionFilter {
00067 int section_index;
00068 int section_h_size;
00069 uint8_t *section_buf;
00070 unsigned int check_crc:1;
00071 unsigned int end_of_section_reached:1;
00072 SectionCallback *section_cb;
00073 void *opaque;
00074 } MpegTSSectionFilter;
00075
00076 struct MpegTSFilter {
00077 int pid;
00078 int es_id;
00079 int last_cc;
00080 enum MpegTSFilterType type;
00081 union {
00082 MpegTSPESFilter pes_filter;
00083 MpegTSSectionFilter section_filter;
00084 } u;
00085 };
00086
00087 #define MAX_PIDS_PER_PROGRAM 64
00088 struct Program {
00089 unsigned int id;
00090 unsigned int nb_pids;
00091 unsigned int pids[MAX_PIDS_PER_PROGRAM];
00092 };
00093
00094 struct MpegTSContext {
00095 const AVClass *class;
00096
00097 AVFormatContext *stream;
00099 int raw_packet_size;
00100
00101 int pos47;
00102
00104 int auto_guess;
00105
00107 int mpeg2ts_compute_pcr;
00108
00109 int64_t cur_pcr;
00110 int pcr_incr;
00112
00114 int stop_parse;
00116 AVPacket *pkt;
00118 int64_t last_pos;
00119
00120
00121
00122
00124 unsigned int nb_prg;
00125 struct Program *prg;
00126
00127
00129 MpegTSFilter *pids[NB_PID_MAX];
00130 };
00131
00132 static const AVOption options[] = {
00133 {"compute_pcr", "Compute exact PCR for each transport stream packet.", offsetof(MpegTSContext, mpeg2ts_compute_pcr), AV_OPT_TYPE_INT,
00134 {.dbl = 0}, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
00135 { NULL },
00136 };
00137
00138 static const AVClass mpegtsraw_class = {
00139 .class_name = "mpegtsraw demuxer",
00140 .item_name = av_default_item_name,
00141 .option = options,
00142 .version = LIBAVUTIL_VERSION_INT,
00143 };
00144
00145
00146
00147 enum MpegTSState {
00148 MPEGTS_HEADER = 0,
00149 MPEGTS_PESHEADER,
00150 MPEGTS_PESHEADER_FILL,
00151 MPEGTS_PAYLOAD,
00152 MPEGTS_SKIP,
00153 };
00154
00155
00156 #define PES_START_SIZE 6
00157 #define PES_HEADER_SIZE 9
00158 #define MAX_PES_HEADER_SIZE (9 + 255)
00159
00160 typedef struct PESContext {
00161 int pid;
00162 int pcr_pid;
00163 int stream_type;
00164 MpegTSContext *ts;
00165 AVFormatContext *stream;
00166 AVStream *st;
00167 AVStream *sub_st;
00168 enum MpegTSState state;
00169
00170 int data_index;
00171 int flags;
00172 int total_size;
00173 int pes_header_size;
00174 int extended_stream_id;
00175 int64_t pts, dts;
00176 int64_t ts_packet_pos;
00177 uint8_t header[MAX_PES_HEADER_SIZE];
00178 uint8_t *buffer;
00179 SLConfigDescr sl;
00180 } PESContext;
00181
00182 extern AVInputFormat ff_mpegts_demuxer;
00183
00184 static void clear_program(MpegTSContext *ts, unsigned int programid)
00185 {
00186 int i;
00187
00188 for(i=0; i<ts->nb_prg; i++)
00189 if(ts->prg[i].id == programid)
00190 ts->prg[i].nb_pids = 0;
00191 }
00192
00193 static void clear_programs(MpegTSContext *ts)
00194 {
00195 av_freep(&ts->prg);
00196 ts->nb_prg=0;
00197 }
00198
00199 static void add_pat_entry(MpegTSContext *ts, unsigned int programid)
00200 {
00201 struct Program *p;
00202 void *tmp = av_realloc(ts->prg, (ts->nb_prg+1)*sizeof(struct Program));
00203 if(!tmp)
00204 return;
00205 ts->prg = tmp;
00206 p = &ts->prg[ts->nb_prg];
00207 p->id = programid;
00208 p->nb_pids = 0;
00209 ts->nb_prg++;
00210 }
00211
00212 static void add_pid_to_pmt(MpegTSContext *ts, unsigned int programid, unsigned int pid)
00213 {
00214 int i;
00215 struct Program *p = NULL;
00216 for(i=0; i<ts->nb_prg; i++) {
00217 if(ts->prg[i].id == programid) {
00218 p = &ts->prg[i];
00219 break;
00220 }
00221 }
00222 if(!p)
00223 return;
00224
00225 if(p->nb_pids >= MAX_PIDS_PER_PROGRAM)
00226 return;
00227 p->pids[p->nb_pids++] = pid;
00228 }
00229
00238 static int discard_pid(MpegTSContext *ts, unsigned int pid)
00239 {
00240 int i, j, k;
00241 int used = 0, discarded = 0;
00242 struct Program *p;
00243 for(i=0; i<ts->nb_prg; i++) {
00244 p = &ts->prg[i];
00245 for(j=0; j<p->nb_pids; j++) {
00246 if(p->pids[j] != pid)
00247 continue;
00248
00249 for(k=0; k<ts->stream->nb_programs; k++) {
00250 if(ts->stream->programs[k]->id == p->id) {
00251 if(ts->stream->programs[k]->discard == AVDISCARD_ALL)
00252 discarded++;
00253 else
00254 used++;
00255 }
00256 }
00257 }
00258 }
00259
00260 return !used && discarded;
00261 }
00262
00267 static void write_section_data(AVFormatContext *s, MpegTSFilter *tss1,
00268 const uint8_t *buf, int buf_size, int is_start)
00269 {
00270 MpegTSSectionFilter *tss = &tss1->u.section_filter;
00271 int len;
00272
00273 if (is_start) {
00274 memcpy(tss->section_buf, buf, buf_size);
00275 tss->section_index = buf_size;
00276 tss->section_h_size = -1;
00277 tss->end_of_section_reached = 0;
00278 } else {
00279 if (tss->end_of_section_reached)
00280 return;
00281 len = 4096 - tss->section_index;
00282 if (buf_size < len)
00283 len = buf_size;
00284 memcpy(tss->section_buf + tss->section_index, buf, len);
00285 tss->section_index += len;
00286 }
00287
00288
00289 if (tss->section_h_size == -1 && tss->section_index >= 3) {
00290 len = (AV_RB16(tss->section_buf + 1) & 0xfff) + 3;
00291 if (len > 4096)
00292 return;
00293 tss->section_h_size = len;
00294 }
00295
00296 if (tss->section_h_size != -1 && tss->section_index >= tss->section_h_size) {
00297 tss->end_of_section_reached = 1;
00298 if (!tss->check_crc ||
00299 av_crc(av_crc_get_table(AV_CRC_32_IEEE), -1,
00300 tss->section_buf, tss->section_h_size) == 0)
00301 tss->section_cb(tss1, tss->section_buf, tss->section_h_size);
00302 }
00303 }
00304
00305 static MpegTSFilter *mpegts_open_section_filter(MpegTSContext *ts, unsigned int pid,
00306 SectionCallback *section_cb, void *opaque,
00307 int check_crc)
00308
00309 {
00310 MpegTSFilter *filter;
00311 MpegTSSectionFilter *sec;
00312
00313 av_dlog(ts->stream, "Filter: pid=0x%x\n", pid);
00314
00315 if (pid >= NB_PID_MAX || ts->pids[pid])
00316 return NULL;
00317 filter = av_mallocz(sizeof(MpegTSFilter));
00318 if (!filter)
00319 return NULL;
00320 ts->pids[pid] = filter;
00321 filter->type = MPEGTS_SECTION;
00322 filter->pid = pid;
00323 filter->es_id = -1;
00324 filter->last_cc = -1;
00325 sec = &filter->u.section_filter;
00326 sec->section_cb = section_cb;
00327 sec->opaque = opaque;
00328 sec->section_buf = av_malloc(MAX_SECTION_SIZE);
00329 sec->check_crc = check_crc;
00330 if (!sec->section_buf) {
00331 av_free(filter);
00332 return NULL;
00333 }
00334 return filter;
00335 }
00336
00337 static MpegTSFilter *mpegts_open_pes_filter(MpegTSContext *ts, unsigned int pid,
00338 PESCallback *pes_cb,
00339 void *opaque)
00340 {
00341 MpegTSFilter *filter;
00342 MpegTSPESFilter *pes;
00343
00344 if (pid >= NB_PID_MAX || ts->pids[pid])
00345 return NULL;
00346 filter = av_mallocz(sizeof(MpegTSFilter));
00347 if (!filter)
00348 return NULL;
00349 ts->pids[pid] = filter;
00350 filter->type = MPEGTS_PES;
00351 filter->pid = pid;
00352 filter->es_id = -1;
00353 filter->last_cc = -1;
00354 pes = &filter->u.pes_filter;
00355 pes->pes_cb = pes_cb;
00356 pes->opaque = opaque;
00357 return filter;
00358 }
00359
00360 static void mpegts_close_filter(MpegTSContext *ts, MpegTSFilter *filter)
00361 {
00362 int pid;
00363
00364 pid = filter->pid;
00365 if (filter->type == MPEGTS_SECTION)
00366 av_freep(&filter->u.section_filter.section_buf);
00367 else if (filter->type == MPEGTS_PES) {
00368 PESContext *pes = filter->u.pes_filter.opaque;
00369 av_freep(&pes->buffer);
00370
00371
00372 if (!((PESContext *)filter->u.pes_filter.opaque)->st) {
00373 av_freep(&filter->u.pes_filter.opaque);
00374 }
00375 }
00376
00377 av_free(filter);
00378 ts->pids[pid] = NULL;
00379 }
00380
00381 static int analyze(const uint8_t *buf, int size, int packet_size, int *index){
00382 int stat[TS_MAX_PACKET_SIZE];
00383 int i;
00384 int x=0;
00385 int best_score=0;
00386
00387 memset(stat, 0, packet_size*sizeof(int));
00388
00389 for(x=i=0; i<size-3; i++){
00390 if(buf[i] == 0x47 && !(buf[i+1] & 0x80) && (buf[i+3] & 0x30)){
00391 stat[x]++;
00392 if(stat[x] > best_score){
00393 best_score= stat[x];
00394 if(index) *index= x;
00395 }
00396 }
00397
00398 x++;
00399 if(x == packet_size) x= 0;
00400 }
00401
00402 return best_score;
00403 }
00404
00405
00406 static int get_packet_size(const uint8_t *buf, int size)
00407 {
00408 int score, fec_score, dvhs_score;
00409
00410 if (size < (TS_FEC_PACKET_SIZE * 5 + 1))
00411 return -1;
00412
00413 score = analyze(buf, size, TS_PACKET_SIZE, NULL);
00414 dvhs_score = analyze(buf, size, TS_DVHS_PACKET_SIZE, NULL);
00415 fec_score= analyze(buf, size, TS_FEC_PACKET_SIZE, NULL);
00416
00417
00418 if (score > fec_score && score > dvhs_score) return TS_PACKET_SIZE;
00419 else if(dvhs_score > score && dvhs_score > fec_score) return TS_DVHS_PACKET_SIZE;
00420 else if(score < fec_score && dvhs_score < fec_score) return TS_FEC_PACKET_SIZE;
00421 else return -1;
00422 }
00423
00424 typedef struct SectionHeader {
00425 uint8_t tid;
00426 uint16_t id;
00427 uint8_t version;
00428 uint8_t sec_num;
00429 uint8_t last_sec_num;
00430 } SectionHeader;
00431
00432 static inline int get8(const uint8_t **pp, const uint8_t *p_end)
00433 {
00434 const uint8_t *p;
00435 int c;
00436
00437 p = *pp;
00438 if (p >= p_end)
00439 return -1;
00440 c = *p++;
00441 *pp = p;
00442 return c;
00443 }
00444
00445 static inline int get16(const uint8_t **pp, const uint8_t *p_end)
00446 {
00447 const uint8_t *p;
00448 int c;
00449
00450 p = *pp;
00451 if ((p + 1) >= p_end)
00452 return -1;
00453 c = AV_RB16(p);
00454 p += 2;
00455 *pp = p;
00456 return c;
00457 }
00458
00459
00460 static char *getstr8(const uint8_t **pp, const uint8_t *p_end)
00461 {
00462 int len;
00463 const uint8_t *p;
00464 char *str;
00465
00466 p = *pp;
00467 len = get8(&p, p_end);
00468 if (len < 0)
00469 return NULL;
00470 if ((p + len) > p_end)
00471 return NULL;
00472 str = av_malloc(len + 1);
00473 if (!str)
00474 return NULL;
00475 memcpy(str, p, len);
00476 str[len] = '\0';
00477 p += len;
00478 *pp = p;
00479 return str;
00480 }
00481
00482 static int parse_section_header(SectionHeader *h,
00483 const uint8_t **pp, const uint8_t *p_end)
00484 {
00485 int val;
00486
00487 val = get8(pp, p_end);
00488 if (val < 0)
00489 return -1;
00490 h->tid = val;
00491 *pp += 2;
00492 val = get16(pp, p_end);
00493 if (val < 0)
00494 return -1;
00495 h->id = val;
00496 val = get8(pp, p_end);
00497 if (val < 0)
00498 return -1;
00499 h->version = (val >> 1) & 0x1f;
00500 val = get8(pp, p_end);
00501 if (val < 0)
00502 return -1;
00503 h->sec_num = val;
00504 val = get8(pp, p_end);
00505 if (val < 0)
00506 return -1;
00507 h->last_sec_num = val;
00508 return 0;
00509 }
00510
00511 typedef struct {
00512 uint32_t stream_type;
00513 enum AVMediaType codec_type;
00514 enum CodecID codec_id;
00515 } StreamType;
00516
00517 static const StreamType ISO_types[] = {
00518 { 0x01, AVMEDIA_TYPE_VIDEO, CODEC_ID_MPEG2VIDEO },
00519 { 0x02, AVMEDIA_TYPE_VIDEO, CODEC_ID_MPEG2VIDEO },
00520 { 0x03, AVMEDIA_TYPE_AUDIO, CODEC_ID_MP3 },
00521 { 0x04, AVMEDIA_TYPE_AUDIO, CODEC_ID_MP3 },
00522 { 0x0f, AVMEDIA_TYPE_AUDIO, CODEC_ID_AAC },
00523 { 0x10, AVMEDIA_TYPE_VIDEO, CODEC_ID_MPEG4 },
00524 { 0x11, AVMEDIA_TYPE_AUDIO, CODEC_ID_AAC_LATM },
00525 { 0x1b, AVMEDIA_TYPE_VIDEO, CODEC_ID_H264 },
00526 { 0xd1, AVMEDIA_TYPE_VIDEO, CODEC_ID_DIRAC },
00527 { 0xea, AVMEDIA_TYPE_VIDEO, CODEC_ID_VC1 },
00528 { 0 },
00529 };
00530
00531 static const StreamType HDMV_types[] = {
00532 { 0x80, AVMEDIA_TYPE_AUDIO, CODEC_ID_PCM_BLURAY },
00533 { 0x81, AVMEDIA_TYPE_AUDIO, CODEC_ID_AC3 },
00534 { 0x82, AVMEDIA_TYPE_AUDIO, CODEC_ID_DTS },
00535 { 0x83, AVMEDIA_TYPE_AUDIO, CODEC_ID_TRUEHD },
00536 { 0x84, AVMEDIA_TYPE_AUDIO, CODEC_ID_EAC3 },
00537 { 0x90, AVMEDIA_TYPE_SUBTITLE, CODEC_ID_HDMV_PGS_SUBTITLE },
00538 { 0 },
00539 };
00540
00541
00542 static const StreamType MISC_types[] = {
00543 { 0x81, AVMEDIA_TYPE_AUDIO, CODEC_ID_AC3 },
00544 { 0x8a, AVMEDIA_TYPE_AUDIO, CODEC_ID_DTS },
00545 { 0 },
00546 };
00547
00548 static const StreamType REGD_types[] = {
00549 { MKTAG('d','r','a','c'), AVMEDIA_TYPE_VIDEO, CODEC_ID_DIRAC },
00550 { MKTAG('A','C','-','3'), AVMEDIA_TYPE_AUDIO, CODEC_ID_AC3 },
00551 { MKTAG('B','S','S','D'), AVMEDIA_TYPE_AUDIO, CODEC_ID_S302M },
00552 { 0 },
00553 };
00554
00555
00556 static const StreamType DESC_types[] = {
00557 { 0x6a, AVMEDIA_TYPE_AUDIO, CODEC_ID_AC3 },
00558 { 0x7a, AVMEDIA_TYPE_AUDIO, CODEC_ID_EAC3 },
00559 { 0x7b, AVMEDIA_TYPE_AUDIO, CODEC_ID_DTS },
00560 { 0x56, AVMEDIA_TYPE_SUBTITLE, CODEC_ID_DVB_TELETEXT },
00561 { 0x59, AVMEDIA_TYPE_SUBTITLE, CODEC_ID_DVB_SUBTITLE },
00562 { 0 },
00563 };
00564
00565 static void mpegts_find_stream_type(AVStream *st,
00566 uint32_t stream_type, const StreamType *types)
00567 {
00568 for (; types->stream_type; types++) {
00569 if (stream_type == types->stream_type) {
00570 st->codec->codec_type = types->codec_type;
00571 st->codec->codec_id = types->codec_id;
00572 return;
00573 }
00574 }
00575 }
00576
00577 static int mpegts_set_stream_info(AVStream *st, PESContext *pes,
00578 uint32_t stream_type, uint32_t prog_reg_desc)
00579 {
00580 avpriv_set_pts_info(st, 33, 1, 90000);
00581 st->priv_data = pes;
00582 st->codec->codec_type = AVMEDIA_TYPE_DATA;
00583 st->codec->codec_id = CODEC_ID_NONE;
00584 st->need_parsing = AVSTREAM_PARSE_FULL;
00585 pes->st = st;
00586 pes->stream_type = stream_type;
00587
00588 av_log(pes->stream, AV_LOG_DEBUG,
00589 "stream=%d stream_type=%x pid=%x prog_reg_desc=%.4s\n",
00590 st->index, pes->stream_type, pes->pid, (char*)&prog_reg_desc);
00591
00592 st->codec->codec_tag = pes->stream_type;
00593
00594 mpegts_find_stream_type(st, pes->stream_type, ISO_types);
00595 if (prog_reg_desc == AV_RL32("HDMV") &&
00596 st->codec->codec_id == CODEC_ID_NONE) {
00597 mpegts_find_stream_type(st, pes->stream_type, HDMV_types);
00598 if (pes->stream_type == 0x83) {
00599
00600
00601 AVStream *sub_st;
00602
00603 PESContext *sub_pes = av_malloc(sizeof(*sub_pes));
00604 if (!sub_pes)
00605 return AVERROR(ENOMEM);
00606 memcpy(sub_pes, pes, sizeof(*sub_pes));
00607
00608 sub_st = avformat_new_stream(pes->stream, NULL);
00609 if (!sub_st) {
00610 av_free(sub_pes);
00611 return AVERROR(ENOMEM);
00612 }
00613
00614 sub_st->id = pes->pid;
00615 avpriv_set_pts_info(sub_st, 33, 1, 90000);
00616 sub_st->priv_data = sub_pes;
00617 sub_st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
00618 sub_st->codec->codec_id = CODEC_ID_AC3;
00619 sub_st->need_parsing = AVSTREAM_PARSE_FULL;
00620 sub_pes->sub_st = pes->sub_st = sub_st;
00621 }
00622 }
00623 if (st->codec->codec_id == CODEC_ID_NONE)
00624 mpegts_find_stream_type(st, pes->stream_type, MISC_types);
00625
00626 return 0;
00627 }
00628
00629 static void new_pes_packet(PESContext *pes, AVPacket *pkt)
00630 {
00631 av_init_packet(pkt);
00632
00633 pkt->destruct = av_destruct_packet;
00634 pkt->data = pes->buffer;
00635 pkt->size = pes->data_index;
00636
00637 if(pes->total_size != MAX_PES_PAYLOAD &&
00638 pes->pes_header_size + pes->data_index != pes->total_size + PES_START_SIZE) {
00639 av_log(pes->stream, AV_LOG_WARNING, "PES packet size mismatch\n");
00640 pes->flags |= AV_PKT_FLAG_CORRUPT;
00641 }
00642 memset(pkt->data+pkt->size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
00643
00644
00645 if (pes->sub_st && pes->stream_type == 0x83 && pes->extended_stream_id == 0x76)
00646 pkt->stream_index = pes->sub_st->index;
00647 else
00648 pkt->stream_index = pes->st->index;
00649 pkt->pts = pes->pts;
00650 pkt->dts = pes->dts;
00651
00652 pkt->pos = pes->ts_packet_pos;
00653 pkt->flags = pes->flags;
00654
00655
00656 pes->pts = AV_NOPTS_VALUE;
00657 pes->dts = AV_NOPTS_VALUE;
00658 pes->buffer = NULL;
00659 pes->data_index = 0;
00660 pes->flags = 0;
00661 }
00662
00663 static uint64_t get_bits64(GetBitContext *gb, int bits)
00664 {
00665 uint64_t ret = 0;
00666 while (bits > 17) {
00667 ret <<= 17;
00668 ret |= get_bits(gb, 17);
00669 bits -= 17;
00670 }
00671 ret <<= bits;
00672 ret |= get_bits(gb, bits);
00673 return ret;
00674 }
00675
00676 static int read_sl_header(PESContext *pes, SLConfigDescr *sl, const uint8_t *buf, int buf_size)
00677 {
00678 GetBitContext gb;
00679 int au_start_flag = 0, au_end_flag = 0, ocr_flag = 0, idle_flag = 0;
00680 int padding_flag = 0, padding_bits = 0, inst_bitrate_flag = 0;
00681 int dts_flag = -1, cts_flag = -1;
00682 int64_t dts = AV_NOPTS_VALUE, cts = AV_NOPTS_VALUE;
00683 init_get_bits(&gb, buf, buf_size*8);
00684
00685 if (sl->use_au_start)
00686 au_start_flag = get_bits1(&gb);
00687 if (sl->use_au_end)
00688 au_end_flag = get_bits1(&gb);
00689 if (!sl->use_au_start && !sl->use_au_end)
00690 au_start_flag = au_end_flag = 1;
00691 if (sl->ocr_len > 0)
00692 ocr_flag = get_bits1(&gb);
00693 if (sl->use_idle)
00694 idle_flag = get_bits1(&gb);
00695 if (sl->use_padding)
00696 padding_flag = get_bits1(&gb);
00697 if (padding_flag)
00698 padding_bits = get_bits(&gb, 3);
00699
00700 if (!idle_flag && (!padding_flag || padding_bits != 0)) {
00701 if (sl->packet_seq_num_len)
00702 skip_bits_long(&gb, sl->packet_seq_num_len);
00703 if (sl->degr_prior_len)
00704 if (get_bits1(&gb))
00705 skip_bits(&gb, sl->degr_prior_len);
00706 if (ocr_flag)
00707 skip_bits_long(&gb, sl->ocr_len);
00708 if (au_start_flag) {
00709 if (sl->use_rand_acc_pt)
00710 get_bits1(&gb);
00711 if (sl->au_seq_num_len > 0)
00712 skip_bits_long(&gb, sl->au_seq_num_len);
00713 if (sl->use_timestamps) {
00714 dts_flag = get_bits1(&gb);
00715 cts_flag = get_bits1(&gb);
00716 }
00717 }
00718 if (sl->inst_bitrate_len)
00719 inst_bitrate_flag = get_bits1(&gb);
00720 if (dts_flag == 1)
00721 dts = get_bits64(&gb, sl->timestamp_len);
00722 if (cts_flag == 1)
00723 cts = get_bits64(&gb, sl->timestamp_len);
00724 if (sl->au_len > 0)
00725 skip_bits_long(&gb, sl->au_len);
00726 if (inst_bitrate_flag)
00727 skip_bits_long(&gb, sl->inst_bitrate_len);
00728 }
00729
00730 if (dts != AV_NOPTS_VALUE)
00731 pes->dts = dts;
00732 if (cts != AV_NOPTS_VALUE)
00733 pes->pts = cts;
00734
00735 if (sl->timestamp_len && sl->timestamp_res)
00736 avpriv_set_pts_info(pes->st, sl->timestamp_len, 1, sl->timestamp_res);
00737
00738 return (get_bits_count(&gb) + 7) >> 3;
00739 }
00740
00741
00742 static int mpegts_push_data(MpegTSFilter *filter,
00743 const uint8_t *buf, int buf_size, int is_start,
00744 int64_t pos)
00745 {
00746 PESContext *pes = filter->u.pes_filter.opaque;
00747 MpegTSContext *ts = pes->ts;
00748 const uint8_t *p;
00749 int len, code;
00750
00751 if(!ts->pkt)
00752 return 0;
00753
00754 if (is_start) {
00755 if (pes->state == MPEGTS_PAYLOAD && pes->data_index > 0) {
00756 new_pes_packet(pes, ts->pkt);
00757 ts->stop_parse = 1;
00758 }
00759 pes->state = MPEGTS_HEADER;
00760 pes->data_index = 0;
00761 pes->ts_packet_pos = pos;
00762 }
00763 p = buf;
00764 while (buf_size > 0) {
00765 switch(pes->state) {
00766 case MPEGTS_HEADER:
00767 len = PES_START_SIZE - pes->data_index;
00768 if (len > buf_size)
00769 len = buf_size;
00770 memcpy(pes->header + pes->data_index, p, len);
00771 pes->data_index += len;
00772 p += len;
00773 buf_size -= len;
00774 if (pes->data_index == PES_START_SIZE) {
00775
00776
00777 if (pes->header[0] == 0x00 && pes->header[1] == 0x00 &&
00778 pes->header[2] == 0x01) {
00779
00780 code = pes->header[3] | 0x100;
00781 av_dlog(pes->stream, "pid=%x pes_code=%#x\n", pes->pid, code);
00782
00783 if ((pes->st && pes->st->discard == AVDISCARD_ALL) ||
00784 code == 0x1be)
00785 goto skip;
00786
00787
00788 if (!pes->st) {
00789 pes->st = avformat_new_stream(ts->stream, NULL);
00790 if (!pes->st)
00791 return AVERROR(ENOMEM);
00792 pes->st->id = pes->pid;
00793 mpegts_set_stream_info(pes->st, pes, 0, 0);
00794 }
00795
00796 pes->total_size = AV_RB16(pes->header + 4);
00797
00798
00799 if (!pes->total_size)
00800 pes->total_size = MAX_PES_PAYLOAD;
00801
00802
00803 pes->buffer = av_malloc(pes->total_size+FF_INPUT_BUFFER_PADDING_SIZE);
00804 if (!pes->buffer)
00805 return AVERROR(ENOMEM);
00806
00807 if (code != 0x1bc && code != 0x1bf &&
00808 code != 0x1f0 && code != 0x1f1 &&
00809 code != 0x1ff && code != 0x1f2 &&
00810 code != 0x1f8) {
00811 pes->state = MPEGTS_PESHEADER;
00812 if (pes->st->codec->codec_id == CODEC_ID_NONE) {
00813 av_dlog(pes->stream, "pid=%x stream_type=%x probing\n",
00814 pes->pid, pes->stream_type);
00815 pes->st->codec->codec_id = CODEC_ID_PROBE;
00816 }
00817 } else {
00818 pes->state = MPEGTS_PAYLOAD;
00819 pes->data_index = 0;
00820 }
00821 } else {
00822
00823
00824 skip:
00825 pes->state = MPEGTS_SKIP;
00826 continue;
00827 }
00828 }
00829 break;
00830
00831
00832 case MPEGTS_PESHEADER:
00833 len = PES_HEADER_SIZE - pes->data_index;
00834 if (len < 0)
00835 return -1;
00836 if (len > buf_size)
00837 len = buf_size;
00838 memcpy(pes->header + pes->data_index, p, len);
00839 pes->data_index += len;
00840 p += len;
00841 buf_size -= len;
00842 if (pes->data_index == PES_HEADER_SIZE) {
00843 pes->pes_header_size = pes->header[8] + 9;
00844 pes->state = MPEGTS_PESHEADER_FILL;
00845 }
00846 break;
00847 case MPEGTS_PESHEADER_FILL:
00848 len = pes->pes_header_size - pes->data_index;
00849 if (len < 0)
00850 return -1;
00851 if (len > buf_size)
00852 len = buf_size;
00853 memcpy(pes->header + pes->data_index, p, len);
00854 pes->data_index += len;
00855 p += len;
00856 buf_size -= len;
00857 if (pes->data_index == pes->pes_header_size) {
00858 const uint8_t *r;
00859 unsigned int flags, pes_ext, skip;
00860
00861 flags = pes->header[7];
00862 r = pes->header + 9;
00863 pes->pts = AV_NOPTS_VALUE;
00864 pes->dts = AV_NOPTS_VALUE;
00865 if ((flags & 0xc0) == 0x80) {
00866 pes->dts = pes->pts = ff_parse_pes_pts(r);
00867 r += 5;
00868 } else if ((flags & 0xc0) == 0xc0) {
00869 pes->pts = ff_parse_pes_pts(r);
00870 r += 5;
00871 pes->dts = ff_parse_pes_pts(r);
00872 r += 5;
00873 }
00874 pes->extended_stream_id = -1;
00875 if (flags & 0x01) {
00876 pes_ext = *r++;
00877
00878 skip = (pes_ext >> 4) & 0xb;
00879 skip += skip & 0x9;
00880 r += skip;
00881 if ((pes_ext & 0x41) == 0x01 &&
00882 (r + 2) <= (pes->header + pes->pes_header_size)) {
00883
00884 if ((r[0] & 0x7f) > 0 && (r[1] & 0x80) == 0)
00885 pes->extended_stream_id = r[1];
00886 }
00887 }
00888
00889
00890 pes->state = MPEGTS_PAYLOAD;
00891 pes->data_index = 0;
00892 if (pes->stream_type == 0x12 && buf_size > 0) {
00893 int sl_header_bytes = read_sl_header(pes, &pes->sl, p, buf_size);
00894 pes->pes_header_size += sl_header_bytes;
00895 p += sl_header_bytes;
00896 buf_size -= sl_header_bytes;
00897 }
00898 }
00899 break;
00900 case MPEGTS_PAYLOAD:
00901 if (buf_size > 0 && pes->buffer) {
00902 if (pes->data_index > 0 && pes->data_index+buf_size > pes->total_size) {
00903 new_pes_packet(pes, ts->pkt);
00904 pes->total_size = MAX_PES_PAYLOAD;
00905 pes->buffer = av_malloc(pes->total_size+FF_INPUT_BUFFER_PADDING_SIZE);
00906 if (!pes->buffer)
00907 return AVERROR(ENOMEM);
00908 ts->stop_parse = 1;
00909 } else if (pes->data_index == 0 && buf_size > pes->total_size) {
00910
00911
00912 buf_size = pes->total_size;
00913 }
00914 memcpy(pes->buffer+pes->data_index, p, buf_size);
00915 pes->data_index += buf_size;
00916 }
00917 buf_size = 0;
00918
00919
00920
00921
00922
00923 if (!ts->stop_parse && pes->total_size < MAX_PES_PAYLOAD &&
00924 pes->pes_header_size + pes->data_index == pes->total_size + PES_START_SIZE) {
00925 ts->stop_parse = 1;
00926 new_pes_packet(pes, ts->pkt);
00927 }
00928 break;
00929 case MPEGTS_SKIP:
00930 buf_size = 0;
00931 break;
00932 }
00933 }
00934
00935 return 0;
00936 }
00937
00938 static PESContext *add_pes_stream(MpegTSContext *ts, int pid, int pcr_pid)
00939 {
00940 MpegTSFilter *tss;
00941 PESContext *pes;
00942
00943
00944 pes = av_mallocz(sizeof(PESContext));
00945 if (!pes)
00946 return 0;
00947 pes->ts = ts;
00948 pes->stream = ts->stream;
00949 pes->pid = pid;
00950 pes->pcr_pid = pcr_pid;
00951 pes->state = MPEGTS_SKIP;
00952 pes->pts = AV_NOPTS_VALUE;
00953 pes->dts = AV_NOPTS_VALUE;
00954 tss = mpegts_open_pes_filter(ts, pid, mpegts_push_data, pes);
00955 if (!tss) {
00956 av_free(pes);
00957 return 0;
00958 }
00959 return pes;
00960 }
00961
00962 #define MAX_LEVEL 4
00963 typedef struct {
00964 AVFormatContext *s;
00965 AVIOContext pb;
00966 Mp4Descr *descr;
00967 Mp4Descr *active_descr;
00968 int descr_count;
00969 int max_descr_count;
00970 int level;
00971 } MP4DescrParseContext;
00972
00973 static int init_MP4DescrParseContext(
00974 MP4DescrParseContext *d, AVFormatContext *s, const uint8_t *buf,
00975 unsigned size, Mp4Descr *descr, int max_descr_count)
00976 {
00977 int ret;
00978 if (size > (1<<30))
00979 return AVERROR_INVALIDDATA;
00980
00981 if ((ret = ffio_init_context(&d->pb, (unsigned char*)buf, size, 0,
00982 NULL, NULL, NULL, NULL)) < 0)
00983 return ret;
00984
00985 d->s = s;
00986 d->level = 0;
00987 d->descr_count = 0;
00988 d->descr = descr;
00989 d->active_descr = NULL;
00990 d->max_descr_count = max_descr_count;
00991
00992 return 0;
00993 }
00994
00995 static void update_offsets(AVIOContext *pb, int64_t *off, int *len) {
00996 int64_t new_off = avio_tell(pb);
00997 (*len) -= new_off - *off;
00998 *off = new_off;
00999 }
01000
01001 static int parse_mp4_descr(MP4DescrParseContext *d, int64_t off, int len,
01002 int target_tag);
01003
01004 static int parse_mp4_descr_arr(MP4DescrParseContext *d, int64_t off, int len)
01005 {
01006 while (len > 0) {
01007 if (parse_mp4_descr(d, off, len, 0) < 0)
01008 return -1;
01009 update_offsets(&d->pb, &off, &len);
01010 }
01011 return 0;
01012 }
01013
01014 static int parse_MP4IODescrTag(MP4DescrParseContext *d, int64_t off, int len)
01015 {
01016 avio_rb16(&d->pb);
01017 avio_r8(&d->pb);
01018 avio_r8(&d->pb);
01019 avio_r8(&d->pb);
01020 avio_r8(&d->pb);
01021 avio_r8(&d->pb);
01022 update_offsets(&d->pb, &off, &len);
01023 return parse_mp4_descr_arr(d, off, len);
01024 }
01025
01026 static int parse_MP4ODescrTag(MP4DescrParseContext *d, int64_t off, int len)
01027 {
01028 int id_flags;
01029 if (len < 2)
01030 return 0;
01031 id_flags = avio_rb16(&d->pb);
01032 if (!(id_flags & 0x0020)) {
01033 update_offsets(&d->pb, &off, &len);
01034 return parse_mp4_descr_arr(d, off, len);
01035 } else {
01036 return 0;
01037 }
01038 }
01039
01040 static int parse_MP4ESDescrTag(MP4DescrParseContext *d, int64_t off, int len)
01041 {
01042 int es_id = 0;
01043 if (d->descr_count >= d->max_descr_count)
01044 return -1;
01045 ff_mp4_parse_es_descr(&d->pb, &es_id);
01046 d->active_descr = d->descr + (d->descr_count++);
01047
01048 d->active_descr->es_id = es_id;
01049 update_offsets(&d->pb, &off, &len);
01050 parse_mp4_descr(d, off, len, MP4DecConfigDescrTag);
01051 update_offsets(&d->pb, &off, &len);
01052 if (len > 0)
01053 parse_mp4_descr(d, off, len, MP4SLDescrTag);
01054 d->active_descr = NULL;
01055 return 0;
01056 }
01057
01058 static int parse_MP4DecConfigDescrTag(MP4DescrParseContext *d, int64_t off, int len)
01059 {
01060 Mp4Descr *descr = d->active_descr;
01061 if (!descr)
01062 return -1;
01063 d->active_descr->dec_config_descr = av_malloc(len);
01064 if (!descr->dec_config_descr)
01065 return AVERROR(ENOMEM);
01066 descr->dec_config_descr_len = len;
01067 avio_read(&d->pb, descr->dec_config_descr, len);
01068 return 0;
01069 }
01070
01071 static int parse_MP4SLDescrTag(MP4DescrParseContext *d, int64_t off, int len)
01072 {
01073 Mp4Descr *descr = d->active_descr;
01074 int predefined;
01075 if (!descr)
01076 return -1;
01077
01078 predefined = avio_r8(&d->pb);
01079 if (!predefined) {
01080 int lengths;
01081 int flags = avio_r8(&d->pb);
01082 descr->sl.use_au_start = !!(flags & 0x80);
01083 descr->sl.use_au_end = !!(flags & 0x40);
01084 descr->sl.use_rand_acc_pt = !!(flags & 0x20);
01085 descr->sl.use_padding = !!(flags & 0x08);
01086 descr->sl.use_timestamps = !!(flags & 0x04);
01087 descr->sl.use_idle = !!(flags & 0x02);
01088 descr->sl.timestamp_res = avio_rb32(&d->pb);
01089 avio_rb32(&d->pb);
01090 descr->sl.timestamp_len = avio_r8(&d->pb);
01091 descr->sl.ocr_len = avio_r8(&d->pb);
01092 descr->sl.au_len = avio_r8(&d->pb);
01093 descr->sl.inst_bitrate_len = avio_r8(&d->pb);
01094 lengths = avio_rb16(&d->pb);
01095 descr->sl.degr_prior_len = lengths >> 12;
01096 descr->sl.au_seq_num_len = (lengths >> 7) & 0x1f;
01097 descr->sl.packet_seq_num_len = (lengths >> 2) & 0x1f;
01098 } else {
01099 av_log_missing_feature(d->s, "Predefined SLConfigDescriptor\n", 0);
01100 }
01101 return 0;
01102 }
01103
01104 static int parse_mp4_descr(MP4DescrParseContext *d, int64_t off, int len,
01105 int target_tag) {
01106 int tag;
01107 int len1 = ff_mp4_read_descr(d->s, &d->pb, &tag);
01108 update_offsets(&d->pb, &off, &len);
01109 if (len < 0 || len1 > len || len1 <= 0) {
01110 av_log(d->s, AV_LOG_ERROR, "Tag %x length violation new length %d bytes remaining %d\n", tag, len1, len);
01111 return -1;
01112 }
01113
01114 if (d->level++ >= MAX_LEVEL) {
01115 av_log(d->s, AV_LOG_ERROR, "Maximum MP4 descriptor level exceeded\n");
01116 goto done;
01117 }
01118
01119 if (target_tag && tag != target_tag) {
01120 av_log(d->s, AV_LOG_ERROR, "Found tag %x expected %x\n", tag, target_tag);
01121 goto done;
01122 }
01123
01124 switch (tag) {
01125 case MP4IODescrTag:
01126 parse_MP4IODescrTag(d, off, len1);
01127 break;
01128 case MP4ODescrTag:
01129 parse_MP4ODescrTag(d, off, len1);
01130 break;
01131 case MP4ESDescrTag:
01132 parse_MP4ESDescrTag(d, off, len1);
01133 break;
01134 case MP4DecConfigDescrTag:
01135 parse_MP4DecConfigDescrTag(d, off, len1);
01136 break;
01137 case MP4SLDescrTag:
01138 parse_MP4SLDescrTag(d, off, len1);
01139 break;
01140 }
01141
01142 done:
01143 d->level--;
01144 avio_seek(&d->pb, off + len1, SEEK_SET);
01145 return 0;
01146 }
01147
01148 static int mp4_read_iods(AVFormatContext *s, const uint8_t *buf, unsigned size,
01149 Mp4Descr *descr, int *descr_count, int max_descr_count)
01150 {
01151 MP4DescrParseContext d;
01152 if (init_MP4DescrParseContext(&d, s, buf, size, descr, max_descr_count) < 0)
01153 return -1;
01154
01155 parse_mp4_descr(&d, avio_tell(&d.pb), size, MP4IODescrTag);
01156
01157 *descr_count = d.descr_count;
01158 return 0;
01159 }
01160
01161 static int mp4_read_od(AVFormatContext *s, const uint8_t *buf, unsigned size,
01162 Mp4Descr *descr, int *descr_count, int max_descr_count)
01163 {
01164 MP4DescrParseContext d;
01165 if (init_MP4DescrParseContext(&d, s, buf, size, descr, max_descr_count) < 0)
01166 return -1;
01167
01168 parse_mp4_descr_arr(&d, avio_tell(&d.pb), size);
01169
01170 *descr_count = d.descr_count;
01171 return 0;
01172 }
01173
01174 static void m4sl_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
01175 {
01176 MpegTSContext *ts = filter->u.section_filter.opaque;
01177 SectionHeader h;
01178 const uint8_t *p, *p_end;
01179 AVIOContext pb;
01180 Mp4Descr mp4_descr[MAX_MP4_DESCR_COUNT] = {{ 0 }};
01181 int mp4_descr_count = 0;
01182 int i, pid;
01183 AVFormatContext *s = ts->stream;
01184
01185 p_end = section + section_len - 4;
01186 p = section;
01187 if (parse_section_header(&h, &p, p_end) < 0)
01188 return;
01189 if (h.tid != M4OD_TID)
01190 return;
01191
01192 mp4_read_od(s, p, (unsigned)(p_end - p), mp4_descr, &mp4_descr_count, MAX_MP4_DESCR_COUNT);
01193
01194 for (pid = 0; pid < NB_PID_MAX; pid++) {
01195 if (!ts->pids[pid])
01196 continue;
01197 for (i = 0; i < mp4_descr_count; i++) {
01198 PESContext *pes;
01199 AVStream *st;
01200 if (ts->pids[pid]->es_id != mp4_descr[i].es_id)
01201 continue;
01202 if (!(ts->pids[pid] && ts->pids[pid]->type == MPEGTS_PES)) {
01203 av_log(s, AV_LOG_ERROR, "pid %x is not PES\n", pid);
01204 continue;
01205 }
01206 pes = ts->pids[pid]->u.pes_filter.opaque;
01207 st = pes->st;
01208 if (!st) {
01209 continue;
01210 }
01211
01212 pes->sl = mp4_descr[i].sl;
01213
01214 ffio_init_context(&pb, mp4_descr[i].dec_config_descr,
01215 mp4_descr[i].dec_config_descr_len, 0, NULL, NULL, NULL, NULL);
01216 ff_mp4_read_dec_config_descr(s, st, &pb);
01217 if (st->codec->codec_id == CODEC_ID_AAC &&
01218 st->codec->extradata_size > 0)
01219 st->need_parsing = 0;
01220 if (st->codec->codec_id == CODEC_ID_H264 &&
01221 st->codec->extradata_size > 0)
01222 st->need_parsing = 0;
01223
01224 if (st->codec->codec_id <= CODEC_ID_NONE) {
01225 } else if (st->codec->codec_id < CODEC_ID_FIRST_AUDIO) {
01226 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
01227 } else if (st->codec->codec_id < CODEC_ID_FIRST_SUBTITLE) {
01228 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
01229 } else if (st->codec->codec_id < CODEC_ID_FIRST_UNKNOWN) {
01230 st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
01231 }
01232 }
01233 }
01234 for (i = 0; i < mp4_descr_count; i++)
01235 av_free(mp4_descr[i].dec_config_descr);
01236 }
01237
01238 int ff_parse_mpeg2_descriptor(AVFormatContext *fc, AVStream *st, int stream_type,
01239 const uint8_t **pp, const uint8_t *desc_list_end,
01240 Mp4Descr *mp4_descr, int mp4_descr_count, int pid,
01241 MpegTSContext *ts)
01242 {
01243 const uint8_t *desc_end;
01244 int desc_len, desc_tag, desc_es_id;
01245 char language[252];
01246 int i;
01247
01248 desc_tag = get8(pp, desc_list_end);
01249 if (desc_tag < 0)
01250 return -1;
01251 desc_len = get8(pp, desc_list_end);
01252 if (desc_len < 0)
01253 return -1;
01254 desc_end = *pp + desc_len;
01255 if (desc_end > desc_list_end)
01256 return -1;
01257
01258 av_dlog(fc, "tag: 0x%02x len=%d\n", desc_tag, desc_len);
01259
01260 if (st->codec->codec_id == CODEC_ID_NONE &&
01261 stream_type == STREAM_TYPE_PRIVATE_DATA)
01262 mpegts_find_stream_type(st, desc_tag, DESC_types);
01263
01264 switch(desc_tag) {
01265 case 0x1E:
01266 desc_es_id = get16(pp, desc_end);
01267 if (ts && ts->pids[pid])
01268 ts->pids[pid]->es_id = desc_es_id;
01269 for (i = 0; i < mp4_descr_count; i++)
01270 if (mp4_descr[i].dec_config_descr_len &&
01271 mp4_descr[i].es_id == desc_es_id) {
01272 AVIOContext pb;
01273 ffio_init_context(&pb, mp4_descr[i].dec_config_descr,
01274 mp4_descr[i].dec_config_descr_len, 0, NULL, NULL, NULL, NULL);
01275 ff_mp4_read_dec_config_descr(fc, st, &pb);
01276 if (st->codec->codec_id == CODEC_ID_AAC &&
01277 st->codec->extradata_size > 0)
01278 st->need_parsing = 0;
01279 if (st->codec->codec_id == CODEC_ID_MPEG4SYSTEMS)
01280 mpegts_open_section_filter(ts, pid, m4sl_cb, ts, 1);
01281 }
01282 break;
01283 case 0x1F:
01284 get16(pp, desc_end);
01285 if (mp4_descr_count > 0 && st->codec->codec_id == CODEC_ID_AAC_LATM &&
01286 mp4_descr->dec_config_descr_len && mp4_descr->es_id == pid) {
01287 AVIOContext pb;
01288 ffio_init_context(&pb, mp4_descr->dec_config_descr,
01289 mp4_descr->dec_config_descr_len, 0, NULL, NULL, NULL, NULL);
01290 ff_mp4_read_dec_config_descr(fc, st, &pb);
01291 if (st->codec->codec_id == CODEC_ID_AAC &&
01292 st->codec->extradata_size > 0)
01293 st->need_parsing = 0;
01294 }
01295 break;
01296 case 0x56:
01297 language[0] = get8(pp, desc_end);
01298 language[1] = get8(pp, desc_end);
01299 language[2] = get8(pp, desc_end);
01300 language[3] = 0;
01301 av_dict_set(&st->metadata, "language", language, 0);
01302 break;
01303 case 0x59:
01304 language[0] = get8(pp, desc_end);
01305 language[1] = get8(pp, desc_end);
01306 language[2] = get8(pp, desc_end);
01307 language[3] = 0;
01308
01309 switch(get8(pp, desc_end)) {
01310 case 0x20:
01311 case 0x21:
01312 case 0x22:
01313 case 0x23:
01314 case 0x24:
01315 case 0x25:
01316 st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED;
01317 break;
01318 }
01319 if (st->codec->extradata) {
01320 if (st->codec->extradata_size == 4 && memcmp(st->codec->extradata, *pp, 4))
01321 av_log_ask_for_sample(fc, "DVB sub with multiple IDs\n");
01322 } else {
01323 st->codec->extradata = av_malloc(4 + FF_INPUT_BUFFER_PADDING_SIZE);
01324 if (st->codec->extradata) {
01325 st->codec->extradata_size = 4;
01326 memcpy(st->codec->extradata, *pp, 4);
01327 }
01328 }
01329 *pp += 4;
01330 av_dict_set(&st->metadata, "language", language, 0);
01331 break;
01332 case 0x0a:
01333 for (i = 0; i + 4 <= desc_len; i += 4) {
01334 language[i + 0] = get8(pp, desc_end);
01335 language[i + 1] = get8(pp, desc_end);
01336 language[i + 2] = get8(pp, desc_end);
01337 language[i + 3] = ',';
01338 switch (get8(pp, desc_end)) {
01339 case 0x01: st->disposition |= AV_DISPOSITION_CLEAN_EFFECTS; break;
01340 case 0x02: st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED; break;
01341 case 0x03: st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED; break;
01342 }
01343 }
01344 if (i) {
01345 language[i - 1] = 0;
01346 av_dict_set(&st->metadata, "language", language, 0);
01347 }
01348 break;
01349 case 0x05:
01350 st->codec->codec_tag = bytestream_get_le32(pp);
01351 av_dlog(fc, "reg_desc=%.4s\n", (char*)&st->codec->codec_tag);
01352 if (st->codec->codec_id == CODEC_ID_NONE &&
01353 stream_type == STREAM_TYPE_PRIVATE_DATA)
01354 mpegts_find_stream_type(st, st->codec->codec_tag, REGD_types);
01355 break;
01356 default:
01357 break;
01358 }
01359 *pp = desc_end;
01360 return 0;
01361 }
01362
01363 static void pmt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
01364 {
01365 MpegTSContext *ts = filter->u.section_filter.opaque;
01366 SectionHeader h1, *h = &h1;
01367 PESContext *pes;
01368 AVStream *st;
01369 const uint8_t *p, *p_end, *desc_list_end;
01370 int program_info_length, pcr_pid, pid, stream_type;
01371 int desc_list_len;
01372 uint32_t prog_reg_desc = 0;
01373
01374 Mp4Descr mp4_descr[MAX_MP4_DESCR_COUNT] = {{ 0 }};
01375 int mp4_descr_count = 0;
01376 int i;
01377
01378 av_dlog(ts->stream, "PMT: len %i\n", section_len);
01379 hex_dump_debug(ts->stream, (uint8_t *)section, section_len);
01380
01381 p_end = section + section_len - 4;
01382 p = section;
01383 if (parse_section_header(h, &p, p_end) < 0)
01384 return;
01385
01386 av_dlog(ts->stream, "sid=0x%x sec_num=%d/%d\n",
01387 h->id, h->sec_num, h->last_sec_num);
01388
01389 if (h->tid != PMT_TID)
01390 return;
01391
01392 clear_program(ts, h->id);
01393 pcr_pid = get16(&p, p_end) & 0x1fff;
01394 if (pcr_pid < 0)
01395 return;
01396 add_pid_to_pmt(ts, h->id, pcr_pid);
01397
01398 av_dlog(ts->stream, "pcr_pid=0x%x\n", pcr_pid);
01399
01400 program_info_length = get16(&p, p_end) & 0xfff;
01401 if (program_info_length < 0)
01402 return;
01403 while(program_info_length >= 2) {
01404 uint8_t tag, len;
01405 tag = get8(&p, p_end);
01406 len = get8(&p, p_end);
01407
01408 av_dlog(ts->stream, "program tag: 0x%02x len=%d\n", tag, len);
01409
01410 if(len > program_info_length - 2)
01411
01412 break;
01413 program_info_length -= len + 2;
01414 if (tag == 0x1d) {
01415 get8(&p, p_end);
01416 get8(&p, p_end);
01417 len -= 2;
01418 mp4_read_iods(ts->stream, p, len, mp4_descr + mp4_descr_count,
01419 &mp4_descr_count, MAX_MP4_DESCR_COUNT);
01420 } else if (tag == 0x05 && len >= 4) {
01421 prog_reg_desc = bytestream_get_le32(&p);
01422 len -= 4;
01423 }
01424 p += len;
01425 }
01426 p += program_info_length;
01427 if (p >= p_end)
01428 goto out;
01429
01430
01431 if (!ts->stream->nb_streams)
01432 ts->stop_parse = 1;
01433
01434 for(;;) {
01435 st = 0;
01436 pes = NULL;
01437 stream_type = get8(&p, p_end);
01438 if (stream_type < 0)
01439 break;
01440 pid = get16(&p, p_end) & 0x1fff;
01441 if (pid < 0)
01442 break;
01443
01444
01445 if (ts->pids[pid] && ts->pids[pid]->type == MPEGTS_PES) {
01446 pes = ts->pids[pid]->u.pes_filter.opaque;
01447 if (!pes->st) {
01448 pes->st = avformat_new_stream(pes->stream, NULL);
01449 pes->st->id = pes->pid;
01450 }
01451 st = pes->st;
01452 } else if (stream_type != 0x13) {
01453 if (ts->pids[pid]) mpegts_close_filter(ts, ts->pids[pid]);
01454 pes = add_pes_stream(ts, pid, pcr_pid);
01455 if (pes) {
01456 st = avformat_new_stream(pes->stream, NULL);
01457 st->id = pes->pid;
01458 }
01459 } else {
01460 int idx = ff_find_stream_index(ts->stream, pid);
01461 if (idx >= 0) {
01462 st = ts->stream->streams[idx];
01463 } else {
01464 st = avformat_new_stream(ts->stream, NULL);
01465 st->id = pid;
01466 st->codec->codec_type = AVMEDIA_TYPE_DATA;
01467 }
01468 }
01469
01470 if (!st)
01471 goto out;
01472
01473 if (pes && !pes->stream_type)
01474 mpegts_set_stream_info(st, pes, stream_type, prog_reg_desc);
01475
01476 add_pid_to_pmt(ts, h->id, pid);
01477
01478 ff_program_add_stream_index(ts->stream, h->id, st->index);
01479
01480 desc_list_len = get16(&p, p_end) & 0xfff;
01481 if (desc_list_len < 0)
01482 break;
01483 desc_list_end = p + desc_list_len;
01484 if (desc_list_end > p_end)
01485 break;
01486 for(;;) {
01487 if (ff_parse_mpeg2_descriptor(ts->stream, st, stream_type, &p, desc_list_end,
01488 mp4_descr, mp4_descr_count, pid, ts) < 0)
01489 break;
01490
01491 if (pes && prog_reg_desc == AV_RL32("HDMV") && stream_type == 0x83 && pes->sub_st) {
01492 ff_program_add_stream_index(ts->stream, h->id, pes->sub_st->index);
01493 pes->sub_st->codec->codec_tag = st->codec->codec_tag;
01494 }
01495 }
01496 p = desc_list_end;
01497 }
01498
01499 out:
01500 for (i = 0; i < mp4_descr_count; i++)
01501 av_free(mp4_descr[i].dec_config_descr);
01502 }
01503
01504 static void pat_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
01505 {
01506 MpegTSContext *ts = filter->u.section_filter.opaque;
01507 SectionHeader h1, *h = &h1;
01508 const uint8_t *p, *p_end;
01509 int sid, pmt_pid;
01510
01511 av_dlog(ts->stream, "PAT:\n");
01512 hex_dump_debug(ts->stream, (uint8_t *)section, section_len);
01513
01514 p_end = section + section_len - 4;
01515 p = section;
01516 if (parse_section_header(h, &p, p_end) < 0)
01517 return;
01518 if (h->tid != PAT_TID)
01519 return;
01520
01521 clear_programs(ts);
01522 for(;;) {
01523 sid = get16(&p, p_end);
01524 if (sid < 0)
01525 break;
01526 pmt_pid = get16(&p, p_end) & 0x1fff;
01527 if (pmt_pid < 0)
01528 break;
01529
01530 av_dlog(ts->stream, "sid=0x%x pid=0x%x\n", sid, pmt_pid);
01531
01532 if (sid == 0x0000) {
01533
01534 } else {
01535 av_new_program(ts->stream, sid);
01536 if (ts->pids[pmt_pid])
01537 mpegts_close_filter(ts, ts->pids[pmt_pid]);
01538 mpegts_open_section_filter(ts, pmt_pid, pmt_cb, ts, 1);
01539 add_pat_entry(ts, sid);
01540 add_pid_to_pmt(ts, sid, 0);
01541 add_pid_to_pmt(ts, sid, pmt_pid);
01542 }
01543 }
01544 }
01545
01546 static void sdt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
01547 {
01548 MpegTSContext *ts = filter->u.section_filter.opaque;
01549 SectionHeader h1, *h = &h1;
01550 const uint8_t *p, *p_end, *desc_list_end, *desc_end;
01551 int onid, val, sid, desc_list_len, desc_tag, desc_len, service_type;
01552 char *name, *provider_name;
01553
01554 av_dlog(ts->stream, "SDT:\n");
01555 hex_dump_debug(ts->stream, (uint8_t *)section, section_len);
01556
01557 p_end = section + section_len - 4;
01558 p = section;
01559 if (parse_section_header(h, &p, p_end) < 0)
01560 return;
01561 if (h->tid != SDT_TID)
01562 return;
01563 onid = get16(&p, p_end);
01564 if (onid < 0)
01565 return;
01566 val = get8(&p, p_end);
01567 if (val < 0)
01568 return;
01569 for(;;) {
01570 sid = get16(&p, p_end);
01571 if (sid < 0)
01572 break;
01573 val = get8(&p, p_end);
01574 if (val < 0)
01575 break;
01576 desc_list_len = get16(&p, p_end) & 0xfff;
01577 if (desc_list_len < 0)
01578 break;
01579 desc_list_end = p + desc_list_len;
01580 if (desc_list_end > p_end)
01581 break;
01582 for(;;) {
01583 desc_tag = get8(&p, desc_list_end);
01584 if (desc_tag < 0)
01585 break;
01586 desc_len = get8(&p, desc_list_end);
01587 desc_end = p + desc_len;
01588 if (desc_end > desc_list_end)
01589 break;
01590
01591 av_dlog(ts->stream, "tag: 0x%02x len=%d\n",
01592 desc_tag, desc_len);
01593
01594 switch(desc_tag) {
01595 case 0x48:
01596 service_type = get8(&p, p_end);
01597 if (service_type < 0)
01598 break;
01599 provider_name = getstr8(&p, p_end);
01600 if (!provider_name)
01601 break;
01602 name = getstr8(&p, p_end);
01603 if (name) {
01604 AVProgram *program = av_new_program(ts->stream, sid);
01605 if(program) {
01606 av_dict_set(&program->metadata, "service_name", name, 0);
01607 av_dict_set(&program->metadata, "service_provider", provider_name, 0);
01608 }
01609 }
01610 av_free(name);
01611 av_free(provider_name);
01612 break;
01613 default:
01614 break;
01615 }
01616 p = desc_end;
01617 }
01618 p = desc_list_end;
01619 }
01620 }
01621
01622
01623 static int handle_packet(MpegTSContext *ts, const uint8_t *packet)
01624 {
01625 AVFormatContext *s = ts->stream;
01626 MpegTSFilter *tss;
01627 int len, pid, cc, expected_cc, cc_ok, afc, is_start, is_discontinuity,
01628 has_adaptation, has_payload;
01629 const uint8_t *p, *p_end;
01630 int64_t pos;
01631
01632 pid = AV_RB16(packet + 1) & 0x1fff;
01633 if(pid && discard_pid(ts, pid))
01634 return 0;
01635 is_start = packet[1] & 0x40;
01636 tss = ts->pids[pid];
01637 if (ts->auto_guess && tss == NULL && is_start) {
01638 add_pes_stream(ts, pid, -1);
01639 tss = ts->pids[pid];
01640 }
01641 if (!tss)
01642 return 0;
01643
01644 afc = (packet[3] >> 4) & 3;
01645 if (afc == 0)
01646 return 0;
01647 has_adaptation = afc & 2;
01648 has_payload = afc & 1;
01649 is_discontinuity = has_adaptation
01650 && packet[4] != 0
01651 && (packet[5] & 0x80);
01652
01653
01654 cc = (packet[3] & 0xf);
01655 expected_cc = has_payload ? (tss->last_cc + 1) & 0x0f : tss->last_cc;
01656 cc_ok = pid == 0x1FFF
01657 || is_discontinuity
01658 || tss->last_cc < 0
01659 || expected_cc == cc;
01660
01661 tss->last_cc = cc;
01662 if (!cc_ok) {
01663 av_log(ts->stream, AV_LOG_WARNING,
01664 "Continuity check failed for pid %d expected %d got %d\n",
01665 pid, expected_cc, cc);
01666 if(tss->type == MPEGTS_PES) {
01667 PESContext *pc = tss->u.pes_filter.opaque;
01668 pc->flags |= AV_PKT_FLAG_CORRUPT;
01669 }
01670 }
01671
01672 if (!has_payload)
01673 return 0;
01674 p = packet + 4;
01675 if (has_adaptation) {
01676
01677 p += p[0] + 1;
01678 }
01679
01680 p_end = packet + TS_PACKET_SIZE;
01681 if (p >= p_end)
01682 return 0;
01683
01684 pos = avio_tell(ts->stream->pb);
01685 ts->pos47= pos % ts->raw_packet_size;
01686
01687 if (tss->type == MPEGTS_SECTION) {
01688 if (is_start) {
01689
01690 len = *p++;
01691 if (p + len > p_end)
01692 return 0;
01693 if (len && cc_ok) {
01694
01695 write_section_data(s, tss,
01696 p, len, 0);
01697
01698 if (!ts->pids[pid])
01699 return 0;
01700 }
01701 p += len;
01702 if (p < p_end) {
01703 write_section_data(s, tss,
01704 p, p_end - p, 1);
01705 }
01706 } else {
01707 if (cc_ok) {
01708 write_section_data(s, tss,
01709 p, p_end - p, 0);
01710 }
01711 }
01712 } else {
01713 int ret;
01714
01715 if ((ret = tss->u.pes_filter.pes_cb(tss, p, p_end - p, is_start,
01716 pos - ts->raw_packet_size)) < 0)
01717 return ret;
01718 }
01719
01720 return 0;
01721 }
01722
01723
01724
01725 static int mpegts_resync(AVFormatContext *s)
01726 {
01727 AVIOContext *pb = s->pb;
01728 int c, i;
01729
01730 for(i = 0;i < MAX_RESYNC_SIZE; i++) {
01731 c = avio_r8(pb);
01732 if (pb->eof_reached)
01733 return -1;
01734 if (c == 0x47) {
01735 avio_seek(pb, -1, SEEK_CUR);
01736 return 0;
01737 }
01738 }
01739 av_log(s, AV_LOG_ERROR, "max resync size reached, could not find sync byte\n");
01740
01741 return -1;
01742 }
01743
01744
01745 static int read_packet(AVFormatContext *s, uint8_t *buf, int raw_packet_size)
01746 {
01747 AVIOContext *pb = s->pb;
01748 int skip, len;
01749
01750 for(;;) {
01751 len = avio_read(pb, buf, TS_PACKET_SIZE);
01752 if (len != TS_PACKET_SIZE)
01753 return len < 0 ? len : AVERROR_EOF;
01754
01755 if (buf[0] != 0x47) {
01756
01757 avio_seek(pb, -TS_PACKET_SIZE, SEEK_CUR);
01758 if (mpegts_resync(s) < 0)
01759 return AVERROR(EAGAIN);
01760 else
01761 continue;
01762 } else {
01763 skip = raw_packet_size - TS_PACKET_SIZE;
01764 if (skip > 0)
01765 avio_skip(pb, skip);
01766 break;
01767 }
01768 }
01769 return 0;
01770 }
01771
01772 static int handle_packets(MpegTSContext *ts, int nb_packets)
01773 {
01774 AVFormatContext *s = ts->stream;
01775 uint8_t packet[TS_PACKET_SIZE+FF_INPUT_BUFFER_PADDING_SIZE];
01776 int packet_num, ret = 0;
01777
01778 if (avio_tell(s->pb) != ts->last_pos) {
01779 int i;
01780 av_dlog(ts->stream, "Skipping after seek\n");
01781
01782 for (i = 0; i < NB_PID_MAX; i++) {
01783 if (ts->pids[i]) {
01784 if (ts->pids[i]->type == MPEGTS_PES) {
01785 PESContext *pes = ts->pids[i]->u.pes_filter.opaque;
01786 av_freep(&pes->buffer);
01787 pes->data_index = 0;
01788 pes->state = MPEGTS_SKIP;
01789 }
01790 ts->pids[i]->last_cc = -1;
01791 }
01792 }
01793 }
01794
01795 ts->stop_parse = 0;
01796 packet_num = 0;
01797 memset(packet + TS_PACKET_SIZE, 0, FF_INPUT_BUFFER_PADDING_SIZE);
01798 for(;;) {
01799 if (ts->stop_parse>0)
01800 break;
01801 packet_num++;
01802 if (nb_packets != 0 && packet_num >= nb_packets)
01803 break;
01804 ret = read_packet(s, packet, ts->raw_packet_size);
01805 if (ret != 0)
01806 break;
01807 ret = handle_packet(ts, packet);
01808 if (ret != 0)
01809 break;
01810 }
01811 ts->last_pos = avio_tell(s->pb);
01812 return ret;
01813 }
01814
01815 static int mpegts_probe(AVProbeData *p)
01816 {
01817 #if 1
01818 const int size= p->buf_size;
01819 int score, fec_score, dvhs_score;
01820 int check_count= size / TS_FEC_PACKET_SIZE;
01821 #define CHECK_COUNT 10
01822
01823 if (check_count < CHECK_COUNT)
01824 return -1;
01825
01826 score = analyze(p->buf, TS_PACKET_SIZE *check_count, TS_PACKET_SIZE , NULL)*CHECK_COUNT/check_count;
01827 dvhs_score= analyze(p->buf, TS_DVHS_PACKET_SIZE*check_count, TS_DVHS_PACKET_SIZE, NULL)*CHECK_COUNT/check_count;
01828 fec_score = analyze(p->buf, TS_FEC_PACKET_SIZE *check_count, TS_FEC_PACKET_SIZE , NULL)*CHECK_COUNT/check_count;
01829
01830
01831
01832 if (score > fec_score && score > dvhs_score && score > 6) return AVPROBE_SCORE_MAX + score - CHECK_COUNT;
01833 else if(dvhs_score > score && dvhs_score > fec_score && dvhs_score > 6) return AVPROBE_SCORE_MAX + dvhs_score - CHECK_COUNT;
01834 else if( fec_score > 6) return AVPROBE_SCORE_MAX + fec_score - CHECK_COUNT;
01835 else return -1;
01836 #else
01837
01838 if (av_match_ext(p->filename, "ts"))
01839 return AVPROBE_SCORE_MAX;
01840 else
01841 return 0;
01842 #endif
01843 }
01844
01845
01846
01847 static int parse_pcr(int64_t *ppcr_high, int *ppcr_low,
01848 const uint8_t *packet)
01849 {
01850 int afc, len, flags;
01851 const uint8_t *p;
01852 unsigned int v;
01853
01854 afc = (packet[3] >> 4) & 3;
01855 if (afc <= 1)
01856 return -1;
01857 p = packet + 4;
01858 len = p[0];
01859 p++;
01860 if (len == 0)
01861 return -1;
01862 flags = *p++;
01863 len--;
01864 if (!(flags & 0x10))
01865 return -1;
01866 if (len < 6)
01867 return -1;
01868 v = AV_RB32(p);
01869 *ppcr_high = ((int64_t)v << 1) | (p[4] >> 7);
01870 *ppcr_low = ((p[4] & 1) << 8) | p[5];
01871 return 0;
01872 }
01873
01874 static int mpegts_read_header(AVFormatContext *s,
01875 AVFormatParameters *ap)
01876 {
01877 MpegTSContext *ts = s->priv_data;
01878 AVIOContext *pb = s->pb;
01879 uint8_t buf[5*1024];
01880 int len;
01881 int64_t pos;
01882
01883
01884 pos = avio_tell(pb);
01885 len = avio_read(pb, buf, sizeof(buf));
01886 if (len != sizeof(buf))
01887 goto fail;
01888 ts->raw_packet_size = get_packet_size(buf, sizeof(buf));
01889 if (ts->raw_packet_size <= 0)
01890 goto fail;
01891 ts->stream = s;
01892 ts->auto_guess = 0;
01893
01894 if (s->iformat == &ff_mpegts_demuxer) {
01895
01896
01897
01898 if (pb->seekable && avio_seek(pb, pos, SEEK_SET) < 0)
01899 av_log(s, AV_LOG_ERROR, "Unable to seek back to the start\n");
01900
01901 mpegts_open_section_filter(ts, SDT_PID, sdt_cb, ts, 1);
01902
01903 mpegts_open_section_filter(ts, PAT_PID, pat_cb, ts, 1);
01904
01905 handle_packets(ts, s->probesize / ts->raw_packet_size);
01906
01907
01908 ts->auto_guess = 1;
01909
01910 av_dlog(ts->stream, "tuning done\n");
01911
01912 s->ctx_flags |= AVFMTCTX_NOHEADER;
01913 } else {
01914 AVStream *st;
01915 int pcr_pid, pid, nb_packets, nb_pcrs, ret, pcr_l;
01916 int64_t pcrs[2], pcr_h;
01917 int packet_count[2];
01918 uint8_t packet[TS_PACKET_SIZE];
01919
01920
01921
01922 st = avformat_new_stream(s, NULL);
01923 if (!st)
01924 goto fail;
01925 avpriv_set_pts_info(st, 60, 1, 27000000);
01926 st->codec->codec_type = AVMEDIA_TYPE_DATA;
01927 st->codec->codec_id = CODEC_ID_MPEG2TS;
01928
01929
01930 pcr_pid = -1;
01931 nb_pcrs = 0;
01932 nb_packets = 0;
01933 for(;;) {
01934 ret = read_packet(s, packet, ts->raw_packet_size);
01935 if (ret < 0)
01936 return -1;
01937 pid = AV_RB16(packet + 1) & 0x1fff;
01938 if ((pcr_pid == -1 || pcr_pid == pid) &&
01939 parse_pcr(&pcr_h, &pcr_l, packet) == 0) {
01940 pcr_pid = pid;
01941 packet_count[nb_pcrs] = nb_packets;
01942 pcrs[nb_pcrs] = pcr_h * 300 + pcr_l;
01943 nb_pcrs++;
01944 if (nb_pcrs >= 2)
01945 break;
01946 }
01947 nb_packets++;
01948 }
01949
01950
01951
01952 ts->pcr_incr = (pcrs[1] - pcrs[0]) / (packet_count[1] - packet_count[0]);
01953 ts->cur_pcr = pcrs[0] - ts->pcr_incr * packet_count[0];
01954 s->bit_rate = (TS_PACKET_SIZE * 8) * 27e6 / ts->pcr_incr;
01955 st->codec->bit_rate = s->bit_rate;
01956 st->start_time = ts->cur_pcr;
01957 av_dlog(ts->stream, "start=%0.3f pcr=%0.3f incr=%d\n",
01958 st->start_time / 1000000.0, pcrs[0] / 27e6, ts->pcr_incr);
01959 }
01960
01961 avio_seek(pb, pos, SEEK_SET);
01962 return 0;
01963 fail:
01964 return -1;
01965 }
01966
01967 #define MAX_PACKET_READAHEAD ((128 * 1024) / 188)
01968
01969 static int mpegts_raw_read_packet(AVFormatContext *s,
01970 AVPacket *pkt)
01971 {
01972 MpegTSContext *ts = s->priv_data;
01973 int ret, i;
01974 int64_t pcr_h, next_pcr_h, pos;
01975 int pcr_l, next_pcr_l;
01976 uint8_t pcr_buf[12];
01977
01978 if (av_new_packet(pkt, TS_PACKET_SIZE) < 0)
01979 return AVERROR(ENOMEM);
01980 pkt->pos= avio_tell(s->pb);
01981 ret = read_packet(s, pkt->data, ts->raw_packet_size);
01982 if (ret < 0) {
01983 av_free_packet(pkt);
01984 return ret;
01985 }
01986 if (ts->mpeg2ts_compute_pcr) {
01987
01988 if (parse_pcr(&pcr_h, &pcr_l, pkt->data) == 0) {
01989
01990 pos = avio_tell(s->pb);
01991 for(i = 0; i < MAX_PACKET_READAHEAD; i++) {
01992 avio_seek(s->pb, pos + i * ts->raw_packet_size, SEEK_SET);
01993 avio_read(s->pb, pcr_buf, 12);
01994 if (parse_pcr(&next_pcr_h, &next_pcr_l, pcr_buf) == 0) {
01995
01996 ts->pcr_incr = ((next_pcr_h - pcr_h) * 300 + (next_pcr_l - pcr_l)) /
01997 (i + 1);
01998 break;
01999 }
02000 }
02001 avio_seek(s->pb, pos, SEEK_SET);
02002
02003 ts->cur_pcr = pcr_h * 300 + pcr_l;
02004 }
02005 pkt->pts = ts->cur_pcr;
02006 pkt->duration = ts->pcr_incr;
02007 ts->cur_pcr += ts->pcr_incr;
02008 }
02009 pkt->stream_index = 0;
02010 return 0;
02011 }
02012
02013 static int mpegts_read_packet(AVFormatContext *s,
02014 AVPacket *pkt)
02015 {
02016 MpegTSContext *ts = s->priv_data;
02017 int ret, i;
02018
02019 ts->pkt = pkt;
02020 ret = handle_packets(ts, 0);
02021 if (ret < 0) {
02022
02023 for (i = 0; i < NB_PID_MAX; i++) {
02024 if (ts->pids[i] && ts->pids[i]->type == MPEGTS_PES) {
02025 PESContext *pes = ts->pids[i]->u.pes_filter.opaque;
02026 if (pes->state == MPEGTS_PAYLOAD && pes->data_index > 0) {
02027 new_pes_packet(pes, pkt);
02028 pes->state = MPEGTS_SKIP;
02029 ret = 0;
02030 break;
02031 }
02032 }
02033 }
02034 }
02035
02036 return ret;
02037 }
02038
02039 static int mpegts_read_close(AVFormatContext *s)
02040 {
02041 MpegTSContext *ts = s->priv_data;
02042 int i;
02043
02044 clear_programs(ts);
02045
02046 for(i=0;i<NB_PID_MAX;i++)
02047 if (ts->pids[i]) mpegts_close_filter(ts, ts->pids[i]);
02048
02049 return 0;
02050 }
02051
02052 static int64_t mpegts_get_pcr(AVFormatContext *s, int stream_index,
02053 int64_t *ppos, int64_t pos_limit)
02054 {
02055 MpegTSContext *ts = s->priv_data;
02056 int64_t pos, timestamp;
02057 uint8_t buf[TS_PACKET_SIZE];
02058 int pcr_l, pcr_pid = ((PESContext*)s->streams[stream_index]->priv_data)->pcr_pid;
02059 const int find_next= 1;
02060 pos = ((*ppos + ts->raw_packet_size - 1 - ts->pos47) / ts->raw_packet_size) * ts->raw_packet_size + ts->pos47;
02061 if (find_next) {
02062 for(;;) {
02063 avio_seek(s->pb, pos, SEEK_SET);
02064 if (avio_read(s->pb, buf, TS_PACKET_SIZE) != TS_PACKET_SIZE)
02065 return AV_NOPTS_VALUE;
02066 if ((pcr_pid < 0 || (AV_RB16(buf + 1) & 0x1fff) == pcr_pid) &&
02067 parse_pcr(×tamp, &pcr_l, buf) == 0) {
02068 break;
02069 }
02070 pos += ts->raw_packet_size;
02071 }
02072 } else {
02073 for(;;) {
02074 pos -= ts->raw_packet_size;
02075 if (pos < 0)
02076 return AV_NOPTS_VALUE;
02077 avio_seek(s->pb, pos, SEEK_SET);
02078 if (avio_read(s->pb, buf, TS_PACKET_SIZE) != TS_PACKET_SIZE)
02079 return AV_NOPTS_VALUE;
02080 if ((pcr_pid < 0 || (AV_RB16(buf + 1) & 0x1fff) == pcr_pid) &&
02081 parse_pcr(×tamp, &pcr_l, buf) == 0) {
02082 break;
02083 }
02084 }
02085 }
02086 *ppos = pos;
02087
02088 return timestamp;
02089 }
02090
02091 #ifdef USE_SYNCPOINT_SEARCH
02092
02093 static int read_seek2(AVFormatContext *s,
02094 int stream_index,
02095 int64_t min_ts,
02096 int64_t target_ts,
02097 int64_t max_ts,
02098 int flags)
02099 {
02100 int64_t pos;
02101
02102 int64_t ts_ret, ts_adj;
02103 int stream_index_gen_search;
02104 AVStream *st;
02105 AVParserState *backup;
02106
02107 backup = ff_store_parser_state(s);
02108
02109
02110 flags |= (target_ts - min_ts > (uint64_t)(max_ts - target_ts)) ?
02111 AVSEEK_FLAG_BACKWARD : 0;
02112
02113 if (flags & AVSEEK_FLAG_BYTE) {
02114
02115 pos = target_ts;
02116 } else {
02117
02118 if (stream_index < 0) {
02119 stream_index_gen_search = av_find_default_stream_index(s);
02120 if (stream_index_gen_search < 0) {
02121 ff_restore_parser_state(s, backup);
02122 return -1;
02123 }
02124
02125 st = s->streams[stream_index_gen_search];
02126
02127 ts_adj = av_rescale(target_ts,
02128 st->time_base.den,
02129 AV_TIME_BASE * (int64_t)st->time_base.num);
02130 } else {
02131 ts_adj = target_ts;
02132 stream_index_gen_search = stream_index;
02133 }
02134 pos = ff_gen_search(s, stream_index_gen_search, ts_adj,
02135 0, INT64_MAX, -1,
02136 AV_NOPTS_VALUE,
02137 AV_NOPTS_VALUE,
02138 flags, &ts_ret, mpegts_get_pcr);
02139 if (pos < 0) {
02140 ff_restore_parser_state(s, backup);
02141 return -1;
02142 }
02143 }
02144
02145
02146 if (ff_gen_syncpoint_search(s, stream_index, pos,
02147 min_ts, target_ts, max_ts,
02148 flags) < 0) {
02149 ff_restore_parser_state(s, backup);
02150 return -1;
02151 }
02152
02153 ff_free_parser_state(s, backup);
02154 return 0;
02155 }
02156
02157 static int read_seek(AVFormatContext *s, int stream_index, int64_t target_ts, int flags)
02158 {
02159 int ret;
02160 if (flags & AVSEEK_FLAG_BACKWARD) {
02161 flags &= ~AVSEEK_FLAG_BACKWARD;
02162 ret = read_seek2(s, stream_index, INT64_MIN, target_ts, target_ts, flags);
02163 if (ret < 0)
02164
02165 ret = read_seek2(s, stream_index, INT64_MIN, target_ts, INT64_MAX, flags);
02166 } else {
02167 ret = read_seek2(s, stream_index, target_ts, target_ts, INT64_MAX, flags);
02168 if (ret < 0)
02169
02170 ret = read_seek2(s, stream_index, INT64_MIN, target_ts, INT64_MAX, flags);
02171 }
02172 return ret;
02173 }
02174
02175 #else
02176
02177 static int read_seek(AVFormatContext *s, int stream_index, int64_t target_ts, int flags){
02178 MpegTSContext *ts = s->priv_data;
02179 uint8_t buf[TS_PACKET_SIZE];
02180 int64_t pos;
02181
02182 if (ff_seek_frame_binary(s, stream_index, target_ts, flags) < 0)
02183 return -1;
02184
02185 pos= avio_tell(s->pb);
02186
02187 for(;;) {
02188 avio_seek(s->pb, pos, SEEK_SET);
02189 if (avio_read(s->pb, buf, TS_PACKET_SIZE) != TS_PACKET_SIZE)
02190 return -1;
02191
02192 if(buf[1] & 0x40) break;
02193 pos += ts->raw_packet_size;
02194 }
02195 avio_seek(s->pb, pos, SEEK_SET);
02196
02197 return 0;
02198 }
02199
02200 #endif
02201
02202
02203
02204
02205 MpegTSContext *ff_mpegts_parse_open(AVFormatContext *s)
02206 {
02207 MpegTSContext *ts;
02208
02209 ts = av_mallocz(sizeof(MpegTSContext));
02210 if (!ts)
02211 return NULL;
02212
02213 ts->raw_packet_size = TS_PACKET_SIZE;
02214 ts->stream = s;
02215 ts->auto_guess = 1;
02216 return ts;
02217 }
02218
02219
02220
02221 int ff_mpegts_parse_packet(MpegTSContext *ts, AVPacket *pkt,
02222 const uint8_t *buf, int len)
02223 {
02224 int len1;
02225
02226 len1 = len;
02227 ts->pkt = pkt;
02228 ts->stop_parse = 0;
02229 for(;;) {
02230 if (ts->stop_parse>0)
02231 break;
02232 if (len < TS_PACKET_SIZE)
02233 return -1;
02234 if (buf[0] != 0x47) {
02235 buf++;
02236 len--;
02237 } else {
02238 handle_packet(ts, buf);
02239 buf += TS_PACKET_SIZE;
02240 len -= TS_PACKET_SIZE;
02241 }
02242 }
02243 return len1 - len;
02244 }
02245
02246 void ff_mpegts_parse_close(MpegTSContext *ts)
02247 {
02248 int i;
02249
02250 for(i=0;i<NB_PID_MAX;i++)
02251 av_free(ts->pids[i]);
02252 av_free(ts);
02253 }
02254
02255 AVInputFormat ff_mpegts_demuxer = {
02256 .name = "mpegts",
02257 .long_name = NULL_IF_CONFIG_SMALL("MPEG-2 transport stream format"),
02258 .priv_data_size = sizeof(MpegTSContext),
02259 .read_probe = mpegts_probe,
02260 .read_header = mpegts_read_header,
02261 .read_packet = mpegts_read_packet,
02262 .read_close = mpegts_read_close,
02263 .read_seek = read_seek,
02264 .read_timestamp = mpegts_get_pcr,
02265 .flags = AVFMT_SHOW_IDS|AVFMT_TS_DISCONT,
02266 #ifdef USE_SYNCPOINT_SEARCH
02267 .read_seek2 = read_seek2,
02268 #endif
02269 };
02270
02271 AVInputFormat ff_mpegtsraw_demuxer = {
02272 .name = "mpegtsraw",
02273 .long_name = NULL_IF_CONFIG_SMALL("MPEG-2 raw transport stream format"),
02274 .priv_data_size = sizeof(MpegTSContext),
02275 .read_header = mpegts_read_header,
02276 .read_packet = mpegts_raw_read_packet,
02277 .read_close = mpegts_read_close,
02278 .read_seek = read_seek,
02279 .read_timestamp = mpegts_get_pcr,
02280 .flags = AVFMT_SHOW_IDS|AVFMT_TS_DISCONT,
02281 #ifdef USE_SYNCPOINT_SEARCH
02282 .read_seek2 = read_seek2,
02283 #endif
02284 .priv_class = &mpegtsraw_class,
02285 };