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00024 #include "avformat.h"
00025 #include "avio_internal.h"
00026 #include "internal.h"
00027 #include "libavcodec/internal.h"
00028 #include "libavcodec/bytestream.h"
00029 #include "libavutil/opt.h"
00030 #include "libavutil/dict.h"
00031 #include "libavutil/pixdesc.h"
00032 #include "metadata.h"
00033 #include "id3v2.h"
00034 #include "libavutil/avassert.h"
00035 #include "libavutil/avstring.h"
00036 #include "libavutil/mathematics.h"
00037 #include "libavutil/parseutils.h"
00038 #include "riff.h"
00039 #include "audiointerleave.h"
00040 #include "url.h"
00041 #include <sys/time.h>
00042 #include <time.h>
00043 #include <stdarg.h>
00044 #if CONFIG_NETWORK
00045 #include "network.h"
00046 #endif
00047
00048 #undef NDEBUG
00049 #include <assert.h>
00050
00056 unsigned avformat_version(void)
00057 {
00058 return LIBAVFORMAT_VERSION_INT;
00059 }
00060
00061 const char *avformat_configuration(void)
00062 {
00063 return LIBAV_CONFIGURATION;
00064 }
00065
00066 const char *avformat_license(void)
00067 {
00068 #define LICENSE_PREFIX "libavformat license: "
00069 return LICENSE_PREFIX LIBAV_LICENSE + sizeof(LICENSE_PREFIX) - 1;
00070 }
00071
00072
00073
00084 static void frac_init(AVFrac *f, int64_t val, int64_t num, int64_t den)
00085 {
00086 num += (den >> 1);
00087 if (num >= den) {
00088 val += num / den;
00089 num = num % den;
00090 }
00091 f->val = val;
00092 f->num = num;
00093 f->den = den;
00094 }
00095
00102 static void frac_add(AVFrac *f, int64_t incr)
00103 {
00104 int64_t num, den;
00105
00106 num = f->num + incr;
00107 den = f->den;
00108 if (num < 0) {
00109 f->val += num / den;
00110 num = num % den;
00111 if (num < 0) {
00112 num += den;
00113 f->val--;
00114 }
00115 } else if (num >= den) {
00116 f->val += num / den;
00117 num = num % den;
00118 }
00119 f->num = num;
00120 }
00121
00123 static AVInputFormat *first_iformat = NULL;
00125 static AVOutputFormat *first_oformat = NULL;
00126
00127 AVInputFormat *av_iformat_next(AVInputFormat *f)
00128 {
00129 if(f) return f->next;
00130 else return first_iformat;
00131 }
00132
00133 AVOutputFormat *av_oformat_next(AVOutputFormat *f)
00134 {
00135 if(f) return f->next;
00136 else return first_oformat;
00137 }
00138
00139 void av_register_input_format(AVInputFormat *format)
00140 {
00141 AVInputFormat **p;
00142 p = &first_iformat;
00143 while (*p != NULL) p = &(*p)->next;
00144 *p = format;
00145 format->next = NULL;
00146 }
00147
00148 void av_register_output_format(AVOutputFormat *format)
00149 {
00150 AVOutputFormat **p;
00151 p = &first_oformat;
00152 while (*p != NULL) p = &(*p)->next;
00153 *p = format;
00154 format->next = NULL;
00155 }
00156
00157 int av_match_ext(const char *filename, const char *extensions)
00158 {
00159 const char *ext, *p;
00160 char ext1[32], *q;
00161
00162 if(!filename)
00163 return 0;
00164
00165 ext = strrchr(filename, '.');
00166 if (ext) {
00167 ext++;
00168 p = extensions;
00169 for(;;) {
00170 q = ext1;
00171 while (*p != '\0' && *p != ',' && q-ext1<sizeof(ext1)-1)
00172 *q++ = *p++;
00173 *q = '\0';
00174 if (!av_strcasecmp(ext1, ext))
00175 return 1;
00176 if (*p == '\0')
00177 break;
00178 p++;
00179 }
00180 }
00181 return 0;
00182 }
00183
00184 static int match_format(const char *name, const char *names)
00185 {
00186 const char *p;
00187 int len, namelen;
00188
00189 if (!name || !names)
00190 return 0;
00191
00192 namelen = strlen(name);
00193 while ((p = strchr(names, ','))) {
00194 len = FFMAX(p - names, namelen);
00195 if (!av_strncasecmp(name, names, len))
00196 return 1;
00197 names = p+1;
00198 }
00199 return !av_strcasecmp(name, names);
00200 }
00201
00202 AVOutputFormat *av_guess_format(const char *short_name, const char *filename,
00203 const char *mime_type)
00204 {
00205 AVOutputFormat *fmt = NULL, *fmt_found;
00206 int score_max, score;
00207
00208
00209 #if CONFIG_IMAGE2_MUXER
00210 if (!short_name && filename &&
00211 av_filename_number_test(filename) &&
00212 ff_guess_image2_codec(filename) != CODEC_ID_NONE) {
00213 return av_guess_format("image2", NULL, NULL);
00214 }
00215 #endif
00216
00217 fmt_found = NULL;
00218 score_max = 0;
00219 while ((fmt = av_oformat_next(fmt))) {
00220 score = 0;
00221 if (fmt->name && short_name && !strcmp(fmt->name, short_name))
00222 score += 100;
00223 if (fmt->mime_type && mime_type && !strcmp(fmt->mime_type, mime_type))
00224 score += 10;
00225 if (filename && fmt->extensions &&
00226 av_match_ext(filename, fmt->extensions)) {
00227 score += 5;
00228 }
00229 if (score > score_max) {
00230 score_max = score;
00231 fmt_found = fmt;
00232 }
00233 }
00234 return fmt_found;
00235 }
00236
00237 enum CodecID av_guess_codec(AVOutputFormat *fmt, const char *short_name,
00238 const char *filename, const char *mime_type, enum AVMediaType type){
00239 if(type == AVMEDIA_TYPE_VIDEO){
00240 enum CodecID codec_id= CODEC_ID_NONE;
00241
00242 #if CONFIG_IMAGE2_MUXER
00243 if(!strcmp(fmt->name, "image2") || !strcmp(fmt->name, "image2pipe")){
00244 codec_id= ff_guess_image2_codec(filename);
00245 }
00246 #endif
00247 if(codec_id == CODEC_ID_NONE)
00248 codec_id= fmt->video_codec;
00249 return codec_id;
00250 }else if(type == AVMEDIA_TYPE_AUDIO)
00251 return fmt->audio_codec;
00252 else if (type == AVMEDIA_TYPE_SUBTITLE)
00253 return fmt->subtitle_codec;
00254 else
00255 return CODEC_ID_NONE;
00256 }
00257
00258 AVInputFormat *av_find_input_format(const char *short_name)
00259 {
00260 AVInputFormat *fmt = NULL;
00261 while ((fmt = av_iformat_next(fmt))) {
00262 if (match_format(short_name, fmt->name))
00263 return fmt;
00264 }
00265 return NULL;
00266 }
00267
00268
00269 int av_get_packet(AVIOContext *s, AVPacket *pkt, int size)
00270 {
00271 int ret= av_new_packet(pkt, size);
00272
00273 if(ret<0)
00274 return ret;
00275
00276 pkt->pos= avio_tell(s);
00277
00278 ret= avio_read(s, pkt->data, size);
00279 if(ret<=0)
00280 av_free_packet(pkt);
00281 else
00282 av_shrink_packet(pkt, ret);
00283
00284 return ret;
00285 }
00286
00287 int av_append_packet(AVIOContext *s, AVPacket *pkt, int size)
00288 {
00289 int ret;
00290 int old_size;
00291 if (!pkt->size)
00292 return av_get_packet(s, pkt, size);
00293 old_size = pkt->size;
00294 ret = av_grow_packet(pkt, size);
00295 if (ret < 0)
00296 return ret;
00297 ret = avio_read(s, pkt->data + old_size, size);
00298 av_shrink_packet(pkt, old_size + FFMAX(ret, 0));
00299 return ret;
00300 }
00301
00302
00303 int av_filename_number_test(const char *filename)
00304 {
00305 char buf[1024];
00306 return filename && (av_get_frame_filename(buf, sizeof(buf), filename, 1)>=0);
00307 }
00308
00309 AVInputFormat *av_probe_input_format2(AVProbeData *pd, int is_opened, int *score_max)
00310 {
00311 AVProbeData lpd = *pd;
00312 AVInputFormat *fmt1 = NULL, *fmt;
00313 int score, id3 = 0;
00314
00315 if (lpd.buf_size > 10 && ff_id3v2_match(lpd.buf, ID3v2_DEFAULT_MAGIC)) {
00316 int id3len = ff_id3v2_tag_len(lpd.buf);
00317 if (lpd.buf_size > id3len + 16) {
00318 lpd.buf += id3len;
00319 lpd.buf_size -= id3len;
00320 }
00321 id3 = 1;
00322 }
00323
00324 fmt = NULL;
00325 while ((fmt1 = av_iformat_next(fmt1))) {
00326 if (!is_opened == !(fmt1->flags & AVFMT_NOFILE))
00327 continue;
00328 score = 0;
00329 if (fmt1->read_probe) {
00330 score = fmt1->read_probe(&lpd);
00331 } else if (fmt1->extensions) {
00332 if (av_match_ext(lpd.filename, fmt1->extensions)) {
00333 score = 50;
00334 }
00335 }
00336 if (score > *score_max) {
00337 *score_max = score;
00338 fmt = fmt1;
00339 }else if (score == *score_max)
00340 fmt = NULL;
00341 }
00342
00343
00344 if (!fmt && is_opened && *score_max < AVPROBE_SCORE_MAX/4) {
00345 while ((fmt = av_iformat_next(fmt)))
00346 if (fmt->extensions && av_match_ext(lpd.filename, fmt->extensions)) {
00347 *score_max = AVPROBE_SCORE_MAX/4;
00348 break;
00349 }
00350 }
00351
00352 if (!fmt && id3 && *score_max < AVPROBE_SCORE_MAX/4-1) {
00353 while ((fmt = av_iformat_next(fmt)))
00354 if (fmt->extensions && av_match_ext("mp3", fmt->extensions)) {
00355 *score_max = AVPROBE_SCORE_MAX/4-1;
00356 break;
00357 }
00358 }
00359
00360 return fmt;
00361 }
00362
00363 AVInputFormat *av_probe_input_format(AVProbeData *pd, int is_opened){
00364 int score=0;
00365 return av_probe_input_format2(pd, is_opened, &score);
00366 }
00367
00368 static int set_codec_from_probe_data(AVFormatContext *s, AVStream *st, AVProbeData *pd, int score)
00369 {
00370 static const struct {
00371 const char *name; enum CodecID id; enum AVMediaType type;
00372 } fmt_id_type[] = {
00373 { "aac" , CODEC_ID_AAC , AVMEDIA_TYPE_AUDIO },
00374 { "ac3" , CODEC_ID_AC3 , AVMEDIA_TYPE_AUDIO },
00375 { "dts" , CODEC_ID_DTS , AVMEDIA_TYPE_AUDIO },
00376 { "eac3" , CODEC_ID_EAC3 , AVMEDIA_TYPE_AUDIO },
00377 { "h264" , CODEC_ID_H264 , AVMEDIA_TYPE_VIDEO },
00378 { "m4v" , CODEC_ID_MPEG4 , AVMEDIA_TYPE_VIDEO },
00379 { "mp3" , CODEC_ID_MP3 , AVMEDIA_TYPE_AUDIO },
00380 { "mpegvideo", CODEC_ID_MPEG2VIDEO, AVMEDIA_TYPE_VIDEO },
00381 { 0 }
00382 };
00383 AVInputFormat *fmt = av_probe_input_format2(pd, 1, &score);
00384
00385 if (fmt) {
00386 int i;
00387 av_log(s, AV_LOG_DEBUG, "Probe with size=%d, packets=%d detected %s with score=%d\n",
00388 pd->buf_size, MAX_PROBE_PACKETS - st->probe_packets, fmt->name, score);
00389 for (i = 0; fmt_id_type[i].name; i++) {
00390 if (!strcmp(fmt->name, fmt_id_type[i].name)) {
00391 st->codec->codec_id = fmt_id_type[i].id;
00392 st->codec->codec_type = fmt_id_type[i].type;
00393 break;
00394 }
00395 }
00396 }
00397 return !!fmt;
00398 }
00399
00400
00401
00402
00403 #if FF_API_FORMAT_PARAMETERS
00404 static AVDictionary *convert_format_parameters(AVFormatParameters *ap)
00405 {
00406 char buf[1024];
00407 AVDictionary *opts = NULL;
00408
00409 if (!ap)
00410 return NULL;
00411
00412 if (ap->time_base.num) {
00413 snprintf(buf, sizeof(buf), "%d/%d", ap->time_base.den, ap->time_base.num);
00414 av_dict_set(&opts, "framerate", buf, 0);
00415 }
00416 if (ap->sample_rate) {
00417 snprintf(buf, sizeof(buf), "%d", ap->sample_rate);
00418 av_dict_set(&opts, "sample_rate", buf, 0);
00419 }
00420 if (ap->channels) {
00421 snprintf(buf, sizeof(buf), "%d", ap->channels);
00422 av_dict_set(&opts, "channels", buf, 0);
00423 }
00424 if (ap->width || ap->height) {
00425 snprintf(buf, sizeof(buf), "%dx%d", ap->width, ap->height);
00426 av_dict_set(&opts, "video_size", buf, 0);
00427 }
00428 if (ap->pix_fmt != PIX_FMT_NONE) {
00429 av_dict_set(&opts, "pixel_format", av_get_pix_fmt_name(ap->pix_fmt), 0);
00430 }
00431 if (ap->channel) {
00432 snprintf(buf, sizeof(buf), "%d", ap->channel);
00433 av_dict_set(&opts, "channel", buf, 0);
00434 }
00435 if (ap->standard) {
00436 av_dict_set(&opts, "standard", ap->standard, 0);
00437 }
00438 if (ap->mpeg2ts_compute_pcr) {
00439 av_dict_set(&opts, "mpeg2ts_compute_pcr", "1", 0);
00440 }
00441 if (ap->initial_pause) {
00442 av_dict_set(&opts, "initial_pause", "1", 0);
00443 }
00444 return opts;
00445 }
00446
00450 int av_open_input_stream(AVFormatContext **ic_ptr,
00451 AVIOContext *pb, const char *filename,
00452 AVInputFormat *fmt, AVFormatParameters *ap)
00453 {
00454 int err;
00455 AVDictionary *opts;
00456 AVFormatContext *ic;
00457 AVFormatParameters default_ap;
00458
00459 if(!ap){
00460 ap=&default_ap;
00461 memset(ap, 0, sizeof(default_ap));
00462 }
00463 opts = convert_format_parameters(ap);
00464
00465 if(!ap->prealloced_context)
00466 ic = avformat_alloc_context();
00467 else
00468 ic = *ic_ptr;
00469 if (!ic) {
00470 err = AVERROR(ENOMEM);
00471 goto fail;
00472 }
00473 if (pb && fmt && fmt->flags & AVFMT_NOFILE)
00474 av_log(ic, AV_LOG_WARNING, "Custom AVIOContext makes no sense and "
00475 "will be ignored with AVFMT_NOFILE format.\n");
00476 else
00477 ic->pb = pb;
00478
00479 if ((err = avformat_open_input(&ic, filename, fmt, &opts)) < 0)
00480 goto fail;
00481 ic->pb = ic->pb ? ic->pb : pb;
00482
00483 fail:
00484 *ic_ptr = ic;
00485 av_dict_free(&opts);
00486 return err;
00487 }
00488 #endif
00489
00491 #define PROBE_BUF_MIN 2048
00492 #define PROBE_BUF_MAX (1<<20)
00493
00494 int av_probe_input_buffer(AVIOContext *pb, AVInputFormat **fmt,
00495 const char *filename, void *logctx,
00496 unsigned int offset, unsigned int max_probe_size)
00497 {
00498 AVProbeData pd = { filename ? filename : "", NULL, -offset };
00499 unsigned char *buf = NULL;
00500 int ret = 0, probe_size;
00501
00502 if (!max_probe_size) {
00503 max_probe_size = PROBE_BUF_MAX;
00504 } else if (max_probe_size > PROBE_BUF_MAX) {
00505 max_probe_size = PROBE_BUF_MAX;
00506 } else if (max_probe_size < PROBE_BUF_MIN) {
00507 return AVERROR(EINVAL);
00508 }
00509
00510 if (offset >= max_probe_size) {
00511 return AVERROR(EINVAL);
00512 }
00513
00514 for(probe_size= PROBE_BUF_MIN; probe_size<=max_probe_size && !*fmt;
00515 probe_size = FFMIN(probe_size<<1, FFMAX(max_probe_size, probe_size+1))) {
00516 int score = probe_size < max_probe_size ? AVPROBE_SCORE_MAX/4 : 0;
00517
00518 if (probe_size < offset) {
00519 continue;
00520 }
00521
00522
00523 buf = av_realloc(buf, probe_size + AVPROBE_PADDING_SIZE);
00524 if ((ret = avio_read(pb, buf + pd.buf_size, probe_size - pd.buf_size)) < 0) {
00525
00526 if (ret != AVERROR_EOF) {
00527 av_free(buf);
00528 return ret;
00529 }
00530 score = 0;
00531 ret = 0;
00532 }
00533 pd.buf_size += ret;
00534 pd.buf = &buf[offset];
00535
00536 memset(pd.buf + pd.buf_size, 0, AVPROBE_PADDING_SIZE);
00537
00538
00539 *fmt = av_probe_input_format2(&pd, 1, &score);
00540 if(*fmt){
00541 if(score <= AVPROBE_SCORE_MAX/4){
00542 av_log(logctx, AV_LOG_WARNING, "Format detected only with low score of %d, misdetection possible!\n", score);
00543 }else
00544 av_log(logctx, AV_LOG_DEBUG, "Probed with size=%d and score=%d\n", probe_size, score);
00545 }
00546 }
00547
00548 if (!*fmt) {
00549 av_free(buf);
00550 return AVERROR_INVALIDDATA;
00551 }
00552
00553
00554 if ((ret = ffio_rewind_with_probe_data(pb, buf, pd.buf_size)) < 0)
00555 av_free(buf);
00556
00557 return ret;
00558 }
00559
00560 #if FF_API_FORMAT_PARAMETERS
00561 int av_open_input_file(AVFormatContext **ic_ptr, const char *filename,
00562 AVInputFormat *fmt,
00563 int buf_size,
00564 AVFormatParameters *ap)
00565 {
00566 int err;
00567 AVDictionary *opts = convert_format_parameters(ap);
00568
00569 if (!ap || !ap->prealloced_context)
00570 *ic_ptr = NULL;
00571
00572 err = avformat_open_input(ic_ptr, filename, fmt, &opts);
00573
00574 av_dict_free(&opts);
00575 return err;
00576 }
00577 #endif
00578
00579
00580 static int init_input(AVFormatContext *s, const char *filename, AVDictionary **options)
00581 {
00582 int ret;
00583 AVProbeData pd = {filename, NULL, 0};
00584
00585 if (s->pb) {
00586 s->flags |= AVFMT_FLAG_CUSTOM_IO;
00587 if (!s->iformat)
00588 return av_probe_input_buffer(s->pb, &s->iformat, filename, s, 0, 0);
00589 else if (s->iformat->flags & AVFMT_NOFILE)
00590 return AVERROR(EINVAL);
00591 return 0;
00592 }
00593
00594 if ( (s->iformat && s->iformat->flags & AVFMT_NOFILE) ||
00595 (!s->iformat && (s->iformat = av_probe_input_format(&pd, 0))))
00596 return 0;
00597
00598 if ((ret = avio_open2(&s->pb, filename, AVIO_FLAG_READ,
00599 &s->interrupt_callback, options)) < 0)
00600 return ret;
00601 if (s->iformat)
00602 return 0;
00603 return av_probe_input_buffer(s->pb, &s->iformat, filename, s, 0, 0);
00604 }
00605
00606 int avformat_open_input(AVFormatContext **ps, const char *filename, AVInputFormat *fmt, AVDictionary **options)
00607 {
00608 AVFormatContext *s = *ps;
00609 int ret = 0;
00610 AVFormatParameters ap = { { 0 } };
00611 AVDictionary *tmp = NULL;
00612
00613 if (!s && !(s = avformat_alloc_context()))
00614 return AVERROR(ENOMEM);
00615 if (fmt)
00616 s->iformat = fmt;
00617
00618 if (options)
00619 av_dict_copy(&tmp, *options, 0);
00620
00621 if ((ret = av_opt_set_dict(s, &tmp)) < 0)
00622 goto fail;
00623
00624 if ((ret = init_input(s, filename, &tmp)) < 0)
00625 goto fail;
00626
00627
00628 if (s->iformat->flags & AVFMT_NEEDNUMBER) {
00629 if (!av_filename_number_test(filename)) {
00630 ret = AVERROR(EINVAL);
00631 goto fail;
00632 }
00633 }
00634
00635 s->duration = s->start_time = AV_NOPTS_VALUE;
00636 av_strlcpy(s->filename, filename ? filename : "", sizeof(s->filename));
00637
00638
00639 if (s->iformat->priv_data_size > 0) {
00640 if (!(s->priv_data = av_mallocz(s->iformat->priv_data_size))) {
00641 ret = AVERROR(ENOMEM);
00642 goto fail;
00643 }
00644 if (s->iformat->priv_class) {
00645 *(const AVClass**)s->priv_data = s->iformat->priv_class;
00646 av_opt_set_defaults(s->priv_data);
00647 if ((ret = av_opt_set_dict(s->priv_data, &tmp)) < 0)
00648 goto fail;
00649 }
00650 }
00651
00652
00653 if (s->pb)
00654 ff_id3v2_read(s, ID3v2_DEFAULT_MAGIC);
00655
00656 if (s->iformat->read_header)
00657 if ((ret = s->iformat->read_header(s, &ap)) < 0)
00658 goto fail;
00659
00660 if (s->pb && !s->data_offset)
00661 s->data_offset = avio_tell(s->pb);
00662
00663 s->raw_packet_buffer_remaining_size = RAW_PACKET_BUFFER_SIZE;
00664
00665 if (options) {
00666 av_dict_free(options);
00667 *options = tmp;
00668 }
00669 *ps = s;
00670 return 0;
00671
00672 fail:
00673 av_dict_free(&tmp);
00674 if (s->pb && !(s->flags & AVFMT_FLAG_CUSTOM_IO))
00675 avio_close(s->pb);
00676 avformat_free_context(s);
00677 *ps = NULL;
00678 return ret;
00679 }
00680
00681
00682
00683 static AVPacket *add_to_pktbuf(AVPacketList **packet_buffer, AVPacket *pkt,
00684 AVPacketList **plast_pktl){
00685 AVPacketList *pktl = av_mallocz(sizeof(AVPacketList));
00686 if (!pktl)
00687 return NULL;
00688
00689 if (*packet_buffer)
00690 (*plast_pktl)->next = pktl;
00691 else
00692 *packet_buffer = pktl;
00693
00694
00695 *plast_pktl = pktl;
00696 pktl->pkt= *pkt;
00697 return &pktl->pkt;
00698 }
00699
00700 int av_read_packet(AVFormatContext *s, AVPacket *pkt)
00701 {
00702 int ret, i;
00703 AVStream *st;
00704
00705 for(;;){
00706 AVPacketList *pktl = s->raw_packet_buffer;
00707
00708 if (pktl) {
00709 *pkt = pktl->pkt;
00710 if(s->streams[pkt->stream_index]->codec->codec_id != CODEC_ID_PROBE ||
00711 !s->streams[pkt->stream_index]->probe_packets ||
00712 s->raw_packet_buffer_remaining_size < pkt->size){
00713 AVProbeData *pd = &s->streams[pkt->stream_index]->probe_data;
00714 av_freep(&pd->buf);
00715 pd->buf_size = 0;
00716 s->raw_packet_buffer = pktl->next;
00717 s->raw_packet_buffer_remaining_size += pkt->size;
00718 av_free(pktl);
00719 return 0;
00720 }
00721 }
00722
00723 av_init_packet(pkt);
00724 ret= s->iformat->read_packet(s, pkt);
00725 if (ret < 0) {
00726 if (!pktl || ret == AVERROR(EAGAIN))
00727 return ret;
00728 for (i = 0; i < s->nb_streams; i++)
00729 s->streams[i]->probe_packets = 0;
00730 continue;
00731 }
00732
00733 if ((s->flags & AVFMT_FLAG_DISCARD_CORRUPT) &&
00734 (pkt->flags & AV_PKT_FLAG_CORRUPT)) {
00735 av_log(s, AV_LOG_WARNING,
00736 "Dropped corrupted packet (stream = %d)\n",
00737 pkt->stream_index);
00738 av_free_packet(pkt);
00739 continue;
00740 }
00741
00742 st= s->streams[pkt->stream_index];
00743
00744 switch(st->codec->codec_type){
00745 case AVMEDIA_TYPE_VIDEO:
00746 if(s->video_codec_id) st->codec->codec_id= s->video_codec_id;
00747 break;
00748 case AVMEDIA_TYPE_AUDIO:
00749 if(s->audio_codec_id) st->codec->codec_id= s->audio_codec_id;
00750 break;
00751 case AVMEDIA_TYPE_SUBTITLE:
00752 if(s->subtitle_codec_id)st->codec->codec_id= s->subtitle_codec_id;
00753 break;
00754 }
00755
00756 if(!pktl && (st->codec->codec_id != CODEC_ID_PROBE ||
00757 !st->probe_packets))
00758 return ret;
00759
00760 add_to_pktbuf(&s->raw_packet_buffer, pkt, &s->raw_packet_buffer_end);
00761 s->raw_packet_buffer_remaining_size -= pkt->size;
00762
00763 if(st->codec->codec_id == CODEC_ID_PROBE){
00764 AVProbeData *pd = &st->probe_data;
00765 av_log(s, AV_LOG_DEBUG, "probing stream %d\n", st->index);
00766 --st->probe_packets;
00767
00768 pd->buf = av_realloc(pd->buf, pd->buf_size+pkt->size+AVPROBE_PADDING_SIZE);
00769 memcpy(pd->buf+pd->buf_size, pkt->data, pkt->size);
00770 pd->buf_size += pkt->size;
00771 memset(pd->buf+pd->buf_size, 0, AVPROBE_PADDING_SIZE);
00772
00773 if(av_log2(pd->buf_size) != av_log2(pd->buf_size - pkt->size)){
00774
00775 set_codec_from_probe_data(s, st, pd, st->probe_packets > 0 ? AVPROBE_SCORE_MAX/4 : 0);
00776 if(st->codec->codec_id != CODEC_ID_PROBE){
00777 pd->buf_size=0;
00778 av_freep(&pd->buf);
00779 av_log(s, AV_LOG_DEBUG, "probed stream %d\n", st->index);
00780 }
00781 }
00782 }
00783 }
00784 }
00785
00786
00787
00791 static int get_audio_frame_size(AVCodecContext *enc, int size)
00792 {
00793 int frame_size;
00794
00795 if(enc->codec_id == CODEC_ID_VORBIS)
00796 return -1;
00797
00798 if (enc->frame_size <= 1) {
00799 int bits_per_sample = av_get_bits_per_sample(enc->codec_id);
00800
00801 if (bits_per_sample) {
00802 if (enc->channels == 0)
00803 return -1;
00804 frame_size = (size << 3) / (bits_per_sample * enc->channels);
00805 } else {
00806
00807 if (enc->bit_rate == 0)
00808 return -1;
00809 frame_size = ((int64_t)size * 8 * enc->sample_rate) / enc->bit_rate;
00810 }
00811 } else {
00812 frame_size = enc->frame_size;
00813 }
00814 return frame_size;
00815 }
00816
00817
00821 static void compute_frame_duration(int *pnum, int *pden, AVStream *st,
00822 AVCodecParserContext *pc, AVPacket *pkt)
00823 {
00824 int frame_size;
00825
00826 *pnum = 0;
00827 *pden = 0;
00828 switch(st->codec->codec_type) {
00829 case AVMEDIA_TYPE_VIDEO:
00830 if (st->r_frame_rate.num) {
00831 *pnum = st->r_frame_rate.den;
00832 *pden = st->r_frame_rate.num;
00833 } else if(st->time_base.num*1000LL > st->time_base.den) {
00834 *pnum = st->time_base.num;
00835 *pden = st->time_base.den;
00836 }else if(st->codec->time_base.num*1000LL > st->codec->time_base.den){
00837 *pnum = st->codec->time_base.num;
00838 *pden = st->codec->time_base.den;
00839 if (pc && pc->repeat_pict) {
00840 if (*pnum > INT_MAX / (1 + pc->repeat_pict))
00841 *pden /= 1 + pc->repeat_pict;
00842 else
00843 *pnum *= 1 + pc->repeat_pict;
00844 }
00845
00846
00847 if(st->codec->ticks_per_frame>1 && !pc){
00848 *pnum = *pden = 0;
00849 }
00850 }
00851 break;
00852 case AVMEDIA_TYPE_AUDIO:
00853 frame_size = get_audio_frame_size(st->codec, pkt->size);
00854 if (frame_size <= 0 || st->codec->sample_rate <= 0)
00855 break;
00856 *pnum = frame_size;
00857 *pden = st->codec->sample_rate;
00858 break;
00859 default:
00860 break;
00861 }
00862 }
00863
00864 static int is_intra_only(AVCodecContext *enc){
00865 if(enc->codec_type == AVMEDIA_TYPE_AUDIO){
00866 return 1;
00867 }else if(enc->codec_type == AVMEDIA_TYPE_VIDEO){
00868 switch(enc->codec_id){
00869 case CODEC_ID_MJPEG:
00870 case CODEC_ID_MJPEGB:
00871 case CODEC_ID_LJPEG:
00872 case CODEC_ID_PRORES:
00873 case CODEC_ID_RAWVIDEO:
00874 case CODEC_ID_DVVIDEO:
00875 case CODEC_ID_HUFFYUV:
00876 case CODEC_ID_FFVHUFF:
00877 case CODEC_ID_ASV1:
00878 case CODEC_ID_ASV2:
00879 case CODEC_ID_VCR1:
00880 case CODEC_ID_DNXHD:
00881 case CODEC_ID_JPEG2000:
00882 return 1;
00883 default: break;
00884 }
00885 }
00886 return 0;
00887 }
00888
00889 static void update_initial_timestamps(AVFormatContext *s, int stream_index,
00890 int64_t dts, int64_t pts)
00891 {
00892 AVStream *st= s->streams[stream_index];
00893 AVPacketList *pktl= s->packet_buffer;
00894
00895 if(st->first_dts != AV_NOPTS_VALUE || dts == AV_NOPTS_VALUE || st->cur_dts == AV_NOPTS_VALUE)
00896 return;
00897
00898 st->first_dts= dts - st->cur_dts;
00899 st->cur_dts= dts;
00900
00901 for(; pktl; pktl= pktl->next){
00902 if(pktl->pkt.stream_index != stream_index)
00903 continue;
00904
00905 if(pktl->pkt.pts != AV_NOPTS_VALUE && pktl->pkt.pts == pktl->pkt.dts)
00906 pktl->pkt.pts += st->first_dts;
00907
00908 if(pktl->pkt.dts != AV_NOPTS_VALUE)
00909 pktl->pkt.dts += st->first_dts;
00910
00911 if(st->start_time == AV_NOPTS_VALUE && pktl->pkt.pts != AV_NOPTS_VALUE)
00912 st->start_time= pktl->pkt.pts;
00913 }
00914 if (st->start_time == AV_NOPTS_VALUE)
00915 st->start_time = pts;
00916 }
00917
00918 static void update_initial_durations(AVFormatContext *s, AVStream *st, AVPacket *pkt)
00919 {
00920 AVPacketList *pktl= s->packet_buffer;
00921 int64_t cur_dts= 0;
00922
00923 if(st->first_dts != AV_NOPTS_VALUE){
00924 cur_dts= st->first_dts;
00925 for(; pktl; pktl= pktl->next){
00926 if(pktl->pkt.stream_index == pkt->stream_index){
00927 if(pktl->pkt.pts != pktl->pkt.dts || pktl->pkt.dts != AV_NOPTS_VALUE || pktl->pkt.duration)
00928 break;
00929 cur_dts -= pkt->duration;
00930 }
00931 }
00932 pktl= s->packet_buffer;
00933 st->first_dts = cur_dts;
00934 }else if(st->cur_dts)
00935 return;
00936
00937 for(; pktl; pktl= pktl->next){
00938 if(pktl->pkt.stream_index != pkt->stream_index)
00939 continue;
00940 if(pktl->pkt.pts == pktl->pkt.dts && pktl->pkt.dts == AV_NOPTS_VALUE
00941 && !pktl->pkt.duration){
00942 pktl->pkt.dts= cur_dts;
00943 if(!st->codec->has_b_frames)
00944 pktl->pkt.pts= cur_dts;
00945 cur_dts += pkt->duration;
00946 pktl->pkt.duration= pkt->duration;
00947 }else
00948 break;
00949 }
00950 if(st->first_dts == AV_NOPTS_VALUE)
00951 st->cur_dts= cur_dts;
00952 }
00953
00954 static void compute_pkt_fields(AVFormatContext *s, AVStream *st,
00955 AVCodecParserContext *pc, AVPacket *pkt)
00956 {
00957 int num, den, presentation_delayed, delay, i;
00958 int64_t offset;
00959
00960 if (s->flags & AVFMT_FLAG_NOFILLIN)
00961 return;
00962
00963 if((s->flags & AVFMT_FLAG_IGNDTS) && pkt->pts != AV_NOPTS_VALUE)
00964 pkt->dts= AV_NOPTS_VALUE;
00965
00966 if (st->codec->codec_id != CODEC_ID_H264 && pc && pc->pict_type == AV_PICTURE_TYPE_B)
00967
00968 st->codec->has_b_frames = 1;
00969
00970
00971 delay= st->codec->has_b_frames;
00972 presentation_delayed = 0;
00973
00974
00975
00976 if (delay &&
00977 pc && pc->pict_type != AV_PICTURE_TYPE_B)
00978 presentation_delayed = 1;
00979
00980 if(pkt->pts != AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE && pkt->dts > pkt->pts && st->pts_wrap_bits<63
00981 ){
00982 pkt->dts -= 1LL<<st->pts_wrap_bits;
00983 }
00984
00985
00986
00987
00988 if(delay==1 && pkt->dts == pkt->pts && pkt->dts != AV_NOPTS_VALUE && presentation_delayed){
00989 av_log(s, AV_LOG_DEBUG, "invalid dts/pts combination\n");
00990 pkt->dts= pkt->pts= AV_NOPTS_VALUE;
00991 }
00992
00993 if (pkt->duration == 0) {
00994 compute_frame_duration(&num, &den, st, pc, pkt);
00995 if (den && num) {
00996 pkt->duration = av_rescale_rnd(1, num * (int64_t)st->time_base.den, den * (int64_t)st->time_base.num, AV_ROUND_DOWN);
00997
00998 if(pkt->duration != 0 && s->packet_buffer)
00999 update_initial_durations(s, st, pkt);
01000 }
01001 }
01002
01003
01004
01005 if(pc && st->need_parsing == AVSTREAM_PARSE_TIMESTAMPS && pkt->size){
01006
01007 offset = av_rescale(pc->offset, pkt->duration, pkt->size);
01008 if(pkt->pts != AV_NOPTS_VALUE)
01009 pkt->pts += offset;
01010 if(pkt->dts != AV_NOPTS_VALUE)
01011 pkt->dts += offset;
01012 }
01013
01014 if (pc && pc->dts_sync_point >= 0) {
01015
01016 int64_t den = st->codec->time_base.den * (int64_t) st->time_base.num;
01017 if (den > 0) {
01018 int64_t num = st->codec->time_base.num * (int64_t) st->time_base.den;
01019 if (pkt->dts != AV_NOPTS_VALUE) {
01020
01021 st->reference_dts = pkt->dts - pc->dts_ref_dts_delta * num / den;
01022 pkt->pts = pkt->dts + pc->pts_dts_delta * num / den;
01023 } else if (st->reference_dts != AV_NOPTS_VALUE) {
01024
01025 pkt->dts = st->reference_dts + pc->dts_ref_dts_delta * num / den;
01026 pkt->pts = pkt->dts + pc->pts_dts_delta * num / den;
01027 }
01028 if (pc->dts_sync_point > 0)
01029 st->reference_dts = pkt->dts;
01030 }
01031 }
01032
01033
01034 if(pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts > pkt->dts)
01035 presentation_delayed = 1;
01036
01037
01038
01039
01040 if((delay==0 || (delay==1 && pc)) && st->codec->codec_id != CODEC_ID_H264){
01041 if (presentation_delayed) {
01042
01043
01044 if (pkt->dts == AV_NOPTS_VALUE)
01045 pkt->dts = st->last_IP_pts;
01046 update_initial_timestamps(s, pkt->stream_index, pkt->dts, pkt->pts);
01047 if (pkt->dts == AV_NOPTS_VALUE)
01048 pkt->dts = st->cur_dts;
01049
01050
01051
01052 if (st->last_IP_duration == 0)
01053 st->last_IP_duration = pkt->duration;
01054 if(pkt->dts != AV_NOPTS_VALUE)
01055 st->cur_dts = pkt->dts + st->last_IP_duration;
01056 st->last_IP_duration = pkt->duration;
01057 st->last_IP_pts= pkt->pts;
01058
01059
01060 } else if(pkt->pts != AV_NOPTS_VALUE || pkt->dts != AV_NOPTS_VALUE || pkt->duration){
01061 if(pkt->pts != AV_NOPTS_VALUE && pkt->duration){
01062 int64_t old_diff= FFABS(st->cur_dts - pkt->duration - pkt->pts);
01063 int64_t new_diff= FFABS(st->cur_dts - pkt->pts);
01064 if(old_diff < new_diff && old_diff < (pkt->duration>>3)){
01065 pkt->pts += pkt->duration;
01066
01067 }
01068 }
01069
01070
01071 if(pkt->pts == AV_NOPTS_VALUE)
01072 pkt->pts = pkt->dts;
01073 update_initial_timestamps(s, pkt->stream_index, pkt->pts, pkt->pts);
01074 if(pkt->pts == AV_NOPTS_VALUE)
01075 pkt->pts = st->cur_dts;
01076 pkt->dts = pkt->pts;
01077 if(pkt->pts != AV_NOPTS_VALUE)
01078 st->cur_dts = pkt->pts + pkt->duration;
01079 }
01080 }
01081
01082 if(pkt->pts != AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY){
01083 st->pts_buffer[0]= pkt->pts;
01084 for(i=0; i<delay && st->pts_buffer[i] > st->pts_buffer[i+1]; i++)
01085 FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i+1]);
01086 if(pkt->dts == AV_NOPTS_VALUE)
01087 pkt->dts= st->pts_buffer[0];
01088 if(st->codec->codec_id == CODEC_ID_H264){
01089 update_initial_timestamps(s, pkt->stream_index, pkt->dts, pkt->pts);
01090 }
01091 if(pkt->dts > st->cur_dts)
01092 st->cur_dts = pkt->dts;
01093 }
01094
01095
01096
01097
01098 if(is_intra_only(st->codec))
01099 pkt->flags |= AV_PKT_FLAG_KEY;
01100 else if (pc) {
01101 pkt->flags = 0;
01102
01103 if (pc->key_frame == 1)
01104 pkt->flags |= AV_PKT_FLAG_KEY;
01105 else if (pc->key_frame == -1 && pc->pict_type == AV_PICTURE_TYPE_I)
01106 pkt->flags |= AV_PKT_FLAG_KEY;
01107 }
01108 if (pc)
01109 pkt->convergence_duration = pc->convergence_duration;
01110 }
01111
01112
01113 static int read_frame_internal(AVFormatContext *s, AVPacket *pkt)
01114 {
01115 AVStream *st;
01116 int len, ret, i;
01117
01118 av_init_packet(pkt);
01119
01120 for(;;) {
01121
01122 st = s->cur_st;
01123 if (st) {
01124 if (!st->need_parsing || !st->parser) {
01125
01126
01127 *pkt = st->cur_pkt; st->cur_pkt.data= NULL;
01128 compute_pkt_fields(s, st, NULL, pkt);
01129 s->cur_st = NULL;
01130 if ((s->iformat->flags & AVFMT_GENERIC_INDEX) &&
01131 (pkt->flags & AV_PKT_FLAG_KEY) && pkt->dts != AV_NOPTS_VALUE) {
01132 ff_reduce_index(s, st->index);
01133 av_add_index_entry(st, pkt->pos, pkt->dts, 0, 0, AVINDEX_KEYFRAME);
01134 }
01135 break;
01136 } else if (st->cur_len > 0 && st->discard < AVDISCARD_ALL) {
01137 len = av_parser_parse2(st->parser, st->codec, &pkt->data, &pkt->size,
01138 st->cur_ptr, st->cur_len,
01139 st->cur_pkt.pts, st->cur_pkt.dts,
01140 st->cur_pkt.pos);
01141 st->cur_pkt.pts = AV_NOPTS_VALUE;
01142 st->cur_pkt.dts = AV_NOPTS_VALUE;
01143
01144 st->cur_ptr += len;
01145 st->cur_len -= len;
01146
01147
01148 if (pkt->size) {
01149 got_packet:
01150 pkt->duration = 0;
01151 pkt->stream_index = st->index;
01152 pkt->pts = st->parser->pts;
01153 pkt->dts = st->parser->dts;
01154 pkt->pos = st->parser->pos;
01155 if(pkt->data == st->cur_pkt.data && pkt->size == st->cur_pkt.size){
01156 s->cur_st = NULL;
01157 pkt->destruct= st->cur_pkt.destruct;
01158 st->cur_pkt.destruct= NULL;
01159 st->cur_pkt.data = NULL;
01160 assert(st->cur_len == 0);
01161 }else{
01162 pkt->destruct = NULL;
01163 }
01164 compute_pkt_fields(s, st, st->parser, pkt);
01165
01166 if((s->iformat->flags & AVFMT_GENERIC_INDEX) && pkt->flags & AV_PKT_FLAG_KEY){
01167 ff_reduce_index(s, st->index);
01168 av_add_index_entry(st, st->parser->frame_offset, pkt->dts,
01169 0, 0, AVINDEX_KEYFRAME);
01170 }
01171
01172 break;
01173 }
01174 } else {
01175
01176 av_free_packet(&st->cur_pkt);
01177 s->cur_st = NULL;
01178 }
01179 } else {
01180 AVPacket cur_pkt;
01181
01182 ret = av_read_packet(s, &cur_pkt);
01183 if (ret < 0) {
01184 if (ret == AVERROR(EAGAIN))
01185 return ret;
01186
01187 for(i = 0; i < s->nb_streams; i++) {
01188 st = s->streams[i];
01189 if (st->parser && st->need_parsing) {
01190 av_parser_parse2(st->parser, st->codec,
01191 &pkt->data, &pkt->size,
01192 NULL, 0,
01193 AV_NOPTS_VALUE, AV_NOPTS_VALUE,
01194 AV_NOPTS_VALUE);
01195 if (pkt->size)
01196 goto got_packet;
01197 }
01198 }
01199
01200 return ret;
01201 }
01202 st = s->streams[cur_pkt.stream_index];
01203 st->cur_pkt= cur_pkt;
01204
01205 if(st->cur_pkt.pts != AV_NOPTS_VALUE &&
01206 st->cur_pkt.dts != AV_NOPTS_VALUE &&
01207 st->cur_pkt.pts < st->cur_pkt.dts){
01208 av_log(s, AV_LOG_WARNING, "Invalid timestamps stream=%d, pts=%"PRId64", dts=%"PRId64", size=%d\n",
01209 st->cur_pkt.stream_index,
01210 st->cur_pkt.pts,
01211 st->cur_pkt.dts,
01212 st->cur_pkt.size);
01213
01214
01215 }
01216
01217 if(s->debug & FF_FDEBUG_TS)
01218 av_log(s, AV_LOG_DEBUG, "av_read_packet stream=%d, pts=%"PRId64", dts=%"PRId64", size=%d, duration=%d, flags=%d\n",
01219 st->cur_pkt.stream_index,
01220 st->cur_pkt.pts,
01221 st->cur_pkt.dts,
01222 st->cur_pkt.size,
01223 st->cur_pkt.duration,
01224 st->cur_pkt.flags);
01225
01226 s->cur_st = st;
01227 st->cur_ptr = st->cur_pkt.data;
01228 st->cur_len = st->cur_pkt.size;
01229 if (st->need_parsing && !st->parser && !(s->flags & AVFMT_FLAG_NOPARSE)) {
01230 st->parser = av_parser_init(st->codec->codec_id);
01231 if (!st->parser) {
01232
01233 st->need_parsing = AVSTREAM_PARSE_NONE;
01234 }else if(st->need_parsing == AVSTREAM_PARSE_HEADERS){
01235 st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;
01236 }else if(st->need_parsing == AVSTREAM_PARSE_FULL_ONCE){
01237 st->parser->flags |= PARSER_FLAG_ONCE;
01238 }
01239 }
01240 }
01241 }
01242 if(s->debug & FF_FDEBUG_TS)
01243 av_log(s, AV_LOG_DEBUG, "read_frame_internal stream=%d, pts=%"PRId64", dts=%"PRId64", size=%d, duration=%d, flags=%d\n",
01244 pkt->stream_index,
01245 pkt->pts,
01246 pkt->dts,
01247 pkt->size,
01248 pkt->duration,
01249 pkt->flags);
01250
01251 return 0;
01252 }
01253
01254 static int read_from_packet_buffer(AVFormatContext *s, AVPacket *pkt)
01255 {
01256 AVPacketList *pktl = s->packet_buffer;
01257 av_assert0(pktl);
01258 *pkt = pktl->pkt;
01259 s->packet_buffer = pktl->next;
01260 av_freep(&pktl);
01261 return 0;
01262 }
01263
01264 int av_read_frame(AVFormatContext *s, AVPacket *pkt)
01265 {
01266 const int genpts = s->flags & AVFMT_FLAG_GENPTS;
01267 int eof = 0;
01268
01269 if (!genpts)
01270 return s->packet_buffer ? read_from_packet_buffer(s, pkt) :
01271 read_frame_internal(s, pkt);
01272
01273 for (;;) {
01274 int ret;
01275 AVPacketList *pktl = s->packet_buffer;
01276
01277 if (pktl) {
01278 AVPacket *next_pkt = &pktl->pkt;
01279
01280 if (next_pkt->dts != AV_NOPTS_VALUE) {
01281 int wrap_bits = s->streams[next_pkt->stream_index]->pts_wrap_bits;
01282 while (pktl && next_pkt->pts == AV_NOPTS_VALUE) {
01283 if (pktl->pkt.stream_index == next_pkt->stream_index &&
01284 (av_compare_mod(next_pkt->dts, pktl->pkt.dts, 2LL << (wrap_bits - 1)) < 0) &&
01285 av_compare_mod(pktl->pkt.pts, pktl->pkt.dts, 2LL << (wrap_bits - 1))) {
01286 next_pkt->pts = pktl->pkt.dts;
01287 }
01288 pktl = pktl->next;
01289 }
01290 pktl = s->packet_buffer;
01291 }
01292
01293
01294 if (!(next_pkt->pts == AV_NOPTS_VALUE &&
01295 next_pkt->dts != AV_NOPTS_VALUE && !eof))
01296 return read_from_packet_buffer(s, pkt);
01297 }
01298
01299 ret = read_frame_internal(s, pkt);
01300 if (ret < 0) {
01301 if (pktl && ret != AVERROR(EAGAIN)) {
01302 eof = 1;
01303 continue;
01304 } else
01305 return ret;
01306 }
01307
01308 if (av_dup_packet(add_to_pktbuf(&s->packet_buffer, pkt,
01309 &s->packet_buffer_end)) < 0)
01310 return AVERROR(ENOMEM);
01311 }
01312 }
01313
01314
01315 static void flush_packet_queue(AVFormatContext *s)
01316 {
01317 AVPacketList *pktl;
01318
01319 for(;;) {
01320 pktl = s->packet_buffer;
01321 if (!pktl)
01322 break;
01323 s->packet_buffer = pktl->next;
01324 av_free_packet(&pktl->pkt);
01325 av_free(pktl);
01326 }
01327 while(s->raw_packet_buffer){
01328 pktl = s->raw_packet_buffer;
01329 s->raw_packet_buffer = pktl->next;
01330 av_free_packet(&pktl->pkt);
01331 av_free(pktl);
01332 }
01333 s->packet_buffer_end=
01334 s->raw_packet_buffer_end= NULL;
01335 s->raw_packet_buffer_remaining_size = RAW_PACKET_BUFFER_SIZE;
01336 }
01337
01338
01339
01340
01341 int av_find_default_stream_index(AVFormatContext *s)
01342 {
01343 int first_audio_index = -1;
01344 int i;
01345 AVStream *st;
01346
01347 if (s->nb_streams <= 0)
01348 return -1;
01349 for(i = 0; i < s->nb_streams; i++) {
01350 st = s->streams[i];
01351 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
01352 return i;
01353 }
01354 if (first_audio_index < 0 && st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
01355 first_audio_index = i;
01356 }
01357 return first_audio_index >= 0 ? first_audio_index : 0;
01358 }
01359
01363 void ff_read_frame_flush(AVFormatContext *s)
01364 {
01365 AVStream *st;
01366 int i, j;
01367
01368 flush_packet_queue(s);
01369
01370 s->cur_st = NULL;
01371
01372
01373 for(i = 0; i < s->nb_streams; i++) {
01374 st = s->streams[i];
01375
01376 if (st->parser) {
01377 av_parser_close(st->parser);
01378 st->parser = NULL;
01379 av_free_packet(&st->cur_pkt);
01380 }
01381 st->last_IP_pts = AV_NOPTS_VALUE;
01382 st->cur_dts = AV_NOPTS_VALUE;
01383 st->reference_dts = AV_NOPTS_VALUE;
01384
01385 st->cur_ptr = NULL;
01386 st->cur_len = 0;
01387
01388 st->probe_packets = MAX_PROBE_PACKETS;
01389
01390 for(j=0; j<MAX_REORDER_DELAY+1; j++)
01391 st->pts_buffer[j]= AV_NOPTS_VALUE;
01392 }
01393 }
01394
01395 #if FF_API_SEEK_PUBLIC
01396 void av_update_cur_dts(AVFormatContext *s, AVStream *ref_st, int64_t timestamp)
01397 {
01398 ff_update_cur_dts(s, ref_st, timestamp);
01399 }
01400 #endif
01401
01402 void ff_update_cur_dts(AVFormatContext *s, AVStream *ref_st, int64_t timestamp)
01403 {
01404 int i;
01405
01406 for(i = 0; i < s->nb_streams; i++) {
01407 AVStream *st = s->streams[i];
01408
01409 st->cur_dts = av_rescale(timestamp,
01410 st->time_base.den * (int64_t)ref_st->time_base.num,
01411 st->time_base.num * (int64_t)ref_st->time_base.den);
01412 }
01413 }
01414
01415 void ff_reduce_index(AVFormatContext *s, int stream_index)
01416 {
01417 AVStream *st= s->streams[stream_index];
01418 unsigned int max_entries= s->max_index_size / sizeof(AVIndexEntry);
01419
01420 if((unsigned)st->nb_index_entries >= max_entries){
01421 int i;
01422 for(i=0; 2*i<st->nb_index_entries; i++)
01423 st->index_entries[i]= st->index_entries[2*i];
01424 st->nb_index_entries= i;
01425 }
01426 }
01427
01428 int ff_add_index_entry(AVIndexEntry **index_entries,
01429 int *nb_index_entries,
01430 unsigned int *index_entries_allocated_size,
01431 int64_t pos, int64_t timestamp, int size, int distance, int flags)
01432 {
01433 AVIndexEntry *entries, *ie;
01434 int index;
01435
01436 if((unsigned)*nb_index_entries + 1 >= UINT_MAX / sizeof(AVIndexEntry))
01437 return -1;
01438
01439 entries = av_fast_realloc(*index_entries,
01440 index_entries_allocated_size,
01441 (*nb_index_entries + 1) *
01442 sizeof(AVIndexEntry));
01443 if(!entries)
01444 return -1;
01445
01446 *index_entries= entries;
01447
01448 index= ff_index_search_timestamp(*index_entries, *nb_index_entries, timestamp, AVSEEK_FLAG_ANY);
01449
01450 if(index<0){
01451 index= (*nb_index_entries)++;
01452 ie= &entries[index];
01453 assert(index==0 || ie[-1].timestamp < timestamp);
01454 }else{
01455 ie= &entries[index];
01456 if(ie->timestamp != timestamp){
01457 if(ie->timestamp <= timestamp)
01458 return -1;
01459 memmove(entries + index + 1, entries + index, sizeof(AVIndexEntry)*(*nb_index_entries - index));
01460 (*nb_index_entries)++;
01461 }else if(ie->pos == pos && distance < ie->min_distance)
01462 distance= ie->min_distance;
01463 }
01464
01465 ie->pos = pos;
01466 ie->timestamp = timestamp;
01467 ie->min_distance= distance;
01468 ie->size= size;
01469 ie->flags = flags;
01470
01471 return index;
01472 }
01473
01474 int av_add_index_entry(AVStream *st,
01475 int64_t pos, int64_t timestamp, int size, int distance, int flags)
01476 {
01477 return ff_add_index_entry(&st->index_entries, &st->nb_index_entries,
01478 &st->index_entries_allocated_size, pos,
01479 timestamp, size, distance, flags);
01480 }
01481
01482 int ff_index_search_timestamp(const AVIndexEntry *entries, int nb_entries,
01483 int64_t wanted_timestamp, int flags)
01484 {
01485 int a, b, m;
01486 int64_t timestamp;
01487
01488 a = - 1;
01489 b = nb_entries;
01490
01491
01492 if(b && entries[b-1].timestamp < wanted_timestamp)
01493 a= b-1;
01494
01495 while (b - a > 1) {
01496 m = (a + b) >> 1;
01497 timestamp = entries[m].timestamp;
01498 if(timestamp >= wanted_timestamp)
01499 b = m;
01500 if(timestamp <= wanted_timestamp)
01501 a = m;
01502 }
01503 m= (flags & AVSEEK_FLAG_BACKWARD) ? a : b;
01504
01505 if(!(flags & AVSEEK_FLAG_ANY)){
01506 while(m>=0 && m<nb_entries && !(entries[m].flags & AVINDEX_KEYFRAME)){
01507 m += (flags & AVSEEK_FLAG_BACKWARD) ? -1 : 1;
01508 }
01509 }
01510
01511 if(m == nb_entries)
01512 return -1;
01513 return m;
01514 }
01515
01516 int av_index_search_timestamp(AVStream *st, int64_t wanted_timestamp,
01517 int flags)
01518 {
01519 return ff_index_search_timestamp(st->index_entries, st->nb_index_entries,
01520 wanted_timestamp, flags);
01521 }
01522
01523 #if FF_API_SEEK_PUBLIC
01524 int av_seek_frame_binary(AVFormatContext *s, int stream_index, int64_t target_ts, int flags){
01525 return ff_seek_frame_binary(s, stream_index, target_ts, flags);
01526 }
01527 #endif
01528
01529 int ff_seek_frame_binary(AVFormatContext *s, int stream_index, int64_t target_ts, int flags)
01530 {
01531 AVInputFormat *avif= s->iformat;
01532 int64_t av_uninit(pos_min), av_uninit(pos_max), pos, pos_limit;
01533 int64_t ts_min, ts_max, ts;
01534 int index;
01535 int64_t ret;
01536 AVStream *st;
01537
01538 if (stream_index < 0)
01539 return -1;
01540
01541 av_dlog(s, "read_seek: %d %"PRId64"\n", stream_index, target_ts);
01542
01543 ts_max=
01544 ts_min= AV_NOPTS_VALUE;
01545 pos_limit= -1;
01546
01547 st= s->streams[stream_index];
01548 if(st->index_entries){
01549 AVIndexEntry *e;
01550
01551 index= av_index_search_timestamp(st, target_ts, flags | AVSEEK_FLAG_BACKWARD);
01552 index= FFMAX(index, 0);
01553 e= &st->index_entries[index];
01554
01555 if(e->timestamp <= target_ts || e->pos == e->min_distance){
01556 pos_min= e->pos;
01557 ts_min= e->timestamp;
01558 av_dlog(s, "using cached pos_min=0x%"PRIx64" dts_min=%"PRId64"\n",
01559 pos_min,ts_min);
01560 }else{
01561 assert(index==0);
01562 }
01563
01564 index= av_index_search_timestamp(st, target_ts, flags & ~AVSEEK_FLAG_BACKWARD);
01565 assert(index < st->nb_index_entries);
01566 if(index >= 0){
01567 e= &st->index_entries[index];
01568 assert(e->timestamp >= target_ts);
01569 pos_max= e->pos;
01570 ts_max= e->timestamp;
01571 pos_limit= pos_max - e->min_distance;
01572 av_dlog(s, "using cached pos_max=0x%"PRIx64" pos_limit=0x%"PRIx64" dts_max=%"PRId64"\n",
01573 pos_max,pos_limit, ts_max);
01574 }
01575 }
01576
01577 pos= ff_gen_search(s, stream_index, target_ts, pos_min, pos_max, pos_limit, ts_min, ts_max, flags, &ts, avif->read_timestamp);
01578 if(pos<0)
01579 return -1;
01580
01581
01582 if ((ret = avio_seek(s->pb, pos, SEEK_SET)) < 0)
01583 return ret;
01584
01585 ff_update_cur_dts(s, st, ts);
01586
01587 return 0;
01588 }
01589
01590 #if FF_API_SEEK_PUBLIC
01591 int64_t av_gen_search(AVFormatContext *s, int stream_index, int64_t target_ts,
01592 int64_t pos_min, int64_t pos_max, int64_t pos_limit,
01593 int64_t ts_min, int64_t ts_max, int flags, int64_t *ts_ret,
01594 int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t ))
01595 {
01596 return ff_gen_search(s, stream_index, target_ts, pos_min, pos_max,
01597 pos_limit, ts_min, ts_max, flags, ts_ret,
01598 read_timestamp);
01599 }
01600 #endif
01601
01602 int64_t ff_gen_search(AVFormatContext *s, int stream_index, int64_t target_ts,
01603 int64_t pos_min, int64_t pos_max, int64_t pos_limit,
01604 int64_t ts_min, int64_t ts_max, int flags, int64_t *ts_ret,
01605 int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t ))
01606 {
01607 int64_t pos, ts;
01608 int64_t start_pos, filesize;
01609 int no_change;
01610
01611 av_dlog(s, "gen_seek: %d %"PRId64"\n", stream_index, target_ts);
01612
01613 if(ts_min == AV_NOPTS_VALUE){
01614 pos_min = s->data_offset;
01615 ts_min = read_timestamp(s, stream_index, &pos_min, INT64_MAX);
01616 if (ts_min == AV_NOPTS_VALUE)
01617 return -1;
01618 }
01619
01620 if(ts_max == AV_NOPTS_VALUE){
01621 int step= 1024;
01622 filesize = avio_size(s->pb);
01623 pos_max = filesize - 1;
01624 do{
01625 pos_max -= step;
01626 ts_max = read_timestamp(s, stream_index, &pos_max, pos_max + step);
01627 step += step;
01628 }while(ts_max == AV_NOPTS_VALUE && pos_max >= step);
01629 if (ts_max == AV_NOPTS_VALUE)
01630 return -1;
01631
01632 for(;;){
01633 int64_t tmp_pos= pos_max + 1;
01634 int64_t tmp_ts= read_timestamp(s, stream_index, &tmp_pos, INT64_MAX);
01635 if(tmp_ts == AV_NOPTS_VALUE)
01636 break;
01637 ts_max= tmp_ts;
01638 pos_max= tmp_pos;
01639 if(tmp_pos >= filesize)
01640 break;
01641 }
01642 pos_limit= pos_max;
01643 }
01644
01645 if(ts_min > ts_max){
01646 return -1;
01647 }else if(ts_min == ts_max){
01648 pos_limit= pos_min;
01649 }
01650
01651 no_change=0;
01652 while (pos_min < pos_limit) {
01653 av_dlog(s, "pos_min=0x%"PRIx64" pos_max=0x%"PRIx64" dts_min=%"PRId64" dts_max=%"PRId64"\n",
01654 pos_min, pos_max, ts_min, ts_max);
01655 assert(pos_limit <= pos_max);
01656
01657 if(no_change==0){
01658 int64_t approximate_keyframe_distance= pos_max - pos_limit;
01659
01660 pos = av_rescale(target_ts - ts_min, pos_max - pos_min, ts_max - ts_min)
01661 + pos_min - approximate_keyframe_distance;
01662 }else if(no_change==1){
01663
01664 pos = (pos_min + pos_limit)>>1;
01665 }else{
01666
01667
01668 pos=pos_min;
01669 }
01670 if(pos <= pos_min)
01671 pos= pos_min + 1;
01672 else if(pos > pos_limit)
01673 pos= pos_limit;
01674 start_pos= pos;
01675
01676 ts = read_timestamp(s, stream_index, &pos, INT64_MAX);
01677 if(pos == pos_max)
01678 no_change++;
01679 else
01680 no_change=0;
01681 av_dlog(s, "%"PRId64" %"PRId64" %"PRId64" / %"PRId64" %"PRId64" %"PRId64" target:%"PRId64" limit:%"PRId64" start:%"PRId64" noc:%d\n",
01682 pos_min, pos, pos_max, ts_min, ts, ts_max, target_ts,
01683 pos_limit, start_pos, no_change);
01684 if(ts == AV_NOPTS_VALUE){
01685 av_log(s, AV_LOG_ERROR, "read_timestamp() failed in the middle\n");
01686 return -1;
01687 }
01688 assert(ts != AV_NOPTS_VALUE);
01689 if (target_ts <= ts) {
01690 pos_limit = start_pos - 1;
01691 pos_max = pos;
01692 ts_max = ts;
01693 }
01694 if (target_ts >= ts) {
01695 pos_min = pos;
01696 ts_min = ts;
01697 }
01698 }
01699
01700 pos = (flags & AVSEEK_FLAG_BACKWARD) ? pos_min : pos_max;
01701 ts = (flags & AVSEEK_FLAG_BACKWARD) ? ts_min : ts_max;
01702 pos_min = pos;
01703 ts_min = read_timestamp(s, stream_index, &pos_min, INT64_MAX);
01704 pos_min++;
01705 ts_max = read_timestamp(s, stream_index, &pos_min, INT64_MAX);
01706 av_dlog(s, "pos=0x%"PRIx64" %"PRId64"<=%"PRId64"<=%"PRId64"\n",
01707 pos, ts_min, target_ts, ts_max);
01708 *ts_ret= ts;
01709 return pos;
01710 }
01711
01712 static int seek_frame_byte(AVFormatContext *s, int stream_index, int64_t pos, int flags){
01713 int64_t pos_min, pos_max;
01714 #if 0
01715 AVStream *st;
01716
01717 if (stream_index < 0)
01718 return -1;
01719
01720 st= s->streams[stream_index];
01721 #endif
01722
01723 pos_min = s->data_offset;
01724 pos_max = avio_size(s->pb) - 1;
01725
01726 if (pos < pos_min) pos= pos_min;
01727 else if(pos > pos_max) pos= pos_max;
01728
01729 avio_seek(s->pb, pos, SEEK_SET);
01730
01731 #if 0
01732 av_update_cur_dts(s, st, ts);
01733 #endif
01734 return 0;
01735 }
01736
01737 static int seek_frame_generic(AVFormatContext *s,
01738 int stream_index, int64_t timestamp, int flags)
01739 {
01740 int index;
01741 int64_t ret;
01742 AVStream *st;
01743 AVIndexEntry *ie;
01744
01745 st = s->streams[stream_index];
01746
01747 index = av_index_search_timestamp(st, timestamp, flags);
01748
01749 if(index < 0 && st->nb_index_entries && timestamp < st->index_entries[0].timestamp)
01750 return -1;
01751
01752 if(index < 0 || index==st->nb_index_entries-1){
01753 AVPacket pkt;
01754
01755 if(st->nb_index_entries){
01756 assert(st->index_entries);
01757 ie= &st->index_entries[st->nb_index_entries-1];
01758 if ((ret = avio_seek(s->pb, ie->pos, SEEK_SET)) < 0)
01759 return ret;
01760 ff_update_cur_dts(s, st, ie->timestamp);
01761 }else{
01762 if ((ret = avio_seek(s->pb, s->data_offset, SEEK_SET)) < 0)
01763 return ret;
01764 }
01765 for (;;) {
01766 int read_status;
01767 do{
01768 read_status = av_read_frame(s, &pkt);
01769 } while (read_status == AVERROR(EAGAIN));
01770 if (read_status < 0)
01771 break;
01772 av_free_packet(&pkt);
01773 if(stream_index == pkt.stream_index){
01774 if((pkt.flags & AV_PKT_FLAG_KEY) && pkt.dts > timestamp)
01775 break;
01776 }
01777 }
01778 index = av_index_search_timestamp(st, timestamp, flags);
01779 }
01780 if (index < 0)
01781 return -1;
01782
01783 ff_read_frame_flush(s);
01784 if (s->iformat->read_seek){
01785 if(s->iformat->read_seek(s, stream_index, timestamp, flags) >= 0)
01786 return 0;
01787 }
01788 ie = &st->index_entries[index];
01789 if ((ret = avio_seek(s->pb, ie->pos, SEEK_SET)) < 0)
01790 return ret;
01791 ff_update_cur_dts(s, st, ie->timestamp);
01792
01793 return 0;
01794 }
01795
01796 int av_seek_frame(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
01797 {
01798 int ret;
01799 AVStream *st;
01800
01801 if (flags & AVSEEK_FLAG_BYTE) {
01802 if (s->iformat->flags & AVFMT_NO_BYTE_SEEK)
01803 return -1;
01804 ff_read_frame_flush(s);
01805 return seek_frame_byte(s, stream_index, timestamp, flags);
01806 }
01807
01808 if(stream_index < 0){
01809 stream_index= av_find_default_stream_index(s);
01810 if(stream_index < 0)
01811 return -1;
01812
01813 st= s->streams[stream_index];
01814
01815 timestamp = av_rescale(timestamp, st->time_base.den, AV_TIME_BASE * (int64_t)st->time_base.num);
01816 }
01817
01818
01819 if (s->iformat->read_seek) {
01820 ff_read_frame_flush(s);
01821 ret = s->iformat->read_seek(s, stream_index, timestamp, flags);
01822 } else
01823 ret = -1;
01824 if (ret >= 0) {
01825 return 0;
01826 }
01827
01828 if (s->iformat->read_timestamp && !(s->iformat->flags & AVFMT_NOBINSEARCH)) {
01829 ff_read_frame_flush(s);
01830 return ff_seek_frame_binary(s, stream_index, timestamp, flags);
01831 } else if (!(s->iformat->flags & AVFMT_NOGENSEARCH)) {
01832 ff_read_frame_flush(s);
01833 return seek_frame_generic(s, stream_index, timestamp, flags);
01834 }
01835 else
01836 return -1;
01837 }
01838
01839 int avformat_seek_file(AVFormatContext *s, int stream_index, int64_t min_ts, int64_t ts, int64_t max_ts, int flags)
01840 {
01841 if(min_ts > ts || max_ts < ts)
01842 return -1;
01843
01844 if (s->iformat->read_seek2) {
01845 ff_read_frame_flush(s);
01846 return s->iformat->read_seek2(s, stream_index, min_ts, ts, max_ts, flags);
01847 }
01848
01849 if(s->iformat->read_timestamp){
01850
01851 }
01852
01853
01854
01855 if(s->iformat->read_seek || 1)
01856 return av_seek_frame(s, stream_index, ts, flags | ((uint64_t)ts - min_ts > (uint64_t)max_ts - ts ? AVSEEK_FLAG_BACKWARD : 0));
01857
01858
01859 }
01860
01861
01862
01868 static int has_duration(AVFormatContext *ic)
01869 {
01870 int i;
01871 AVStream *st;
01872
01873 for(i = 0;i < ic->nb_streams; i++) {
01874 st = ic->streams[i];
01875 if (st->duration != AV_NOPTS_VALUE)
01876 return 1;
01877 }
01878 return 0;
01879 }
01880
01886 static void update_stream_timings(AVFormatContext *ic)
01887 {
01888 int64_t start_time, start_time1, end_time, end_time1;
01889 int64_t duration, duration1, filesize;
01890 int i;
01891 AVStream *st;
01892
01893 start_time = INT64_MAX;
01894 end_time = INT64_MIN;
01895 duration = INT64_MIN;
01896 for(i = 0;i < ic->nb_streams; i++) {
01897 st = ic->streams[i];
01898 if (st->start_time != AV_NOPTS_VALUE && st->time_base.den) {
01899 start_time1= av_rescale_q(st->start_time, st->time_base, AV_TIME_BASE_Q);
01900 start_time = FFMIN(start_time, start_time1);
01901 if (st->duration != AV_NOPTS_VALUE) {
01902 end_time1 = start_time1
01903 + av_rescale_q(st->duration, st->time_base, AV_TIME_BASE_Q);
01904 end_time = FFMAX(end_time, end_time1);
01905 }
01906 }
01907 if (st->duration != AV_NOPTS_VALUE) {
01908 duration1 = av_rescale_q(st->duration, st->time_base, AV_TIME_BASE_Q);
01909 duration = FFMAX(duration, duration1);
01910 }
01911 }
01912 if (start_time != INT64_MAX) {
01913 ic->start_time = start_time;
01914 if (end_time != INT64_MIN)
01915 duration = FFMAX(duration, end_time - start_time);
01916 }
01917 if (duration != INT64_MIN) {
01918 ic->duration = duration;
01919 if (ic->pb && (filesize = avio_size(ic->pb)) > 0) {
01920
01921 ic->bit_rate = (double)filesize * 8.0 * AV_TIME_BASE /
01922 (double)ic->duration;
01923 }
01924 }
01925 }
01926
01927 static void fill_all_stream_timings(AVFormatContext *ic)
01928 {
01929 int i;
01930 AVStream *st;
01931
01932 update_stream_timings(ic);
01933 for(i = 0;i < ic->nb_streams; i++) {
01934 st = ic->streams[i];
01935 if (st->start_time == AV_NOPTS_VALUE) {
01936 if(ic->start_time != AV_NOPTS_VALUE)
01937 st->start_time = av_rescale_q(ic->start_time, AV_TIME_BASE_Q, st->time_base);
01938 if(ic->duration != AV_NOPTS_VALUE)
01939 st->duration = av_rescale_q(ic->duration, AV_TIME_BASE_Q, st->time_base);
01940 }
01941 }
01942 }
01943
01944 static void estimate_timings_from_bit_rate(AVFormatContext *ic)
01945 {
01946 int64_t filesize, duration;
01947 int bit_rate, i;
01948 AVStream *st;
01949
01950
01951 if (ic->bit_rate <= 0) {
01952 bit_rate = 0;
01953 for(i=0;i<ic->nb_streams;i++) {
01954 st = ic->streams[i];
01955 if (st->codec->bit_rate > 0) {
01956 if (INT_MAX - st->codec->bit_rate < bit_rate) {
01957 bit_rate = 0;
01958 break;
01959 }
01960 bit_rate += st->codec->bit_rate;
01961 }
01962 }
01963 ic->bit_rate = bit_rate;
01964 }
01965
01966
01967 if (ic->duration == AV_NOPTS_VALUE &&
01968 ic->bit_rate != 0) {
01969 filesize = ic->pb ? avio_size(ic->pb) : 0;
01970 if (filesize > 0) {
01971 for(i = 0; i < ic->nb_streams; i++) {
01972 st = ic->streams[i];
01973 duration= av_rescale(8*filesize, st->time_base.den, ic->bit_rate*(int64_t)st->time_base.num);
01974 if (st->duration == AV_NOPTS_VALUE)
01975 st->duration = duration;
01976 }
01977 }
01978 }
01979 }
01980
01981 #define DURATION_MAX_READ_SIZE 250000
01982 #define DURATION_MAX_RETRY 3
01983
01984
01985 static void estimate_timings_from_pts(AVFormatContext *ic, int64_t old_offset)
01986 {
01987 AVPacket pkt1, *pkt = &pkt1;
01988 AVStream *st;
01989 int read_size, i, ret;
01990 int64_t end_time;
01991 int64_t filesize, offset, duration;
01992 int retry=0;
01993
01994 ic->cur_st = NULL;
01995
01996
01997 flush_packet_queue(ic);
01998
01999 for (i=0; i<ic->nb_streams; i++) {
02000 st = ic->streams[i];
02001 if (st->start_time == AV_NOPTS_VALUE && st->first_dts == AV_NOPTS_VALUE)
02002 av_log(st->codec, AV_LOG_WARNING, "start time is not set in estimate_timings_from_pts\n");
02003
02004 if (st->parser) {
02005 av_parser_close(st->parser);
02006 st->parser= NULL;
02007 av_free_packet(&st->cur_pkt);
02008 }
02009 }
02010
02011
02012
02013 filesize = ic->pb ? avio_size(ic->pb) : 0;
02014 end_time = AV_NOPTS_VALUE;
02015 do{
02016 offset = filesize - (DURATION_MAX_READ_SIZE<<retry);
02017 if (offset < 0)
02018 offset = 0;
02019
02020 avio_seek(ic->pb, offset, SEEK_SET);
02021 read_size = 0;
02022 for(;;) {
02023 if (read_size >= DURATION_MAX_READ_SIZE<<(FFMAX(retry-1,0)))
02024 break;
02025
02026 do {
02027 ret = av_read_packet(ic, pkt);
02028 } while(ret == AVERROR(EAGAIN));
02029 if (ret != 0)
02030 break;
02031 read_size += pkt->size;
02032 st = ic->streams[pkt->stream_index];
02033 if (pkt->pts != AV_NOPTS_VALUE &&
02034 (st->start_time != AV_NOPTS_VALUE ||
02035 st->first_dts != AV_NOPTS_VALUE)) {
02036 duration = end_time = pkt->pts;
02037 if (st->start_time != AV_NOPTS_VALUE)
02038 duration -= st->start_time;
02039 else
02040 duration -= st->first_dts;
02041 if (duration < 0)
02042 duration += 1LL<<st->pts_wrap_bits;
02043 if (duration > 0) {
02044 if (st->duration == AV_NOPTS_VALUE || st->duration < duration)
02045 st->duration = duration;
02046 }
02047 }
02048 av_free_packet(pkt);
02049 }
02050 }while( end_time==AV_NOPTS_VALUE
02051 && filesize > (DURATION_MAX_READ_SIZE<<retry)
02052 && ++retry <= DURATION_MAX_RETRY);
02053
02054 fill_all_stream_timings(ic);
02055
02056 avio_seek(ic->pb, old_offset, SEEK_SET);
02057 for (i=0; i<ic->nb_streams; i++) {
02058 st= ic->streams[i];
02059 st->cur_dts= st->first_dts;
02060 st->last_IP_pts = AV_NOPTS_VALUE;
02061 st->reference_dts = AV_NOPTS_VALUE;
02062 }
02063 }
02064
02065 static void estimate_timings(AVFormatContext *ic, int64_t old_offset)
02066 {
02067 int64_t file_size;
02068
02069
02070 if (ic->iformat->flags & AVFMT_NOFILE) {
02071 file_size = 0;
02072 } else {
02073 file_size = avio_size(ic->pb);
02074 file_size = FFMAX(0, file_size);
02075 }
02076
02077 if ((!strcmp(ic->iformat->name, "mpeg") ||
02078 !strcmp(ic->iformat->name, "mpegts")) &&
02079 file_size && ic->pb->seekable) {
02080
02081 estimate_timings_from_pts(ic, old_offset);
02082 } else if (has_duration(ic)) {
02083
02084
02085 fill_all_stream_timings(ic);
02086 } else {
02087 av_log(ic, AV_LOG_WARNING, "Estimating duration from bitrate, this may be inaccurate\n");
02088
02089 estimate_timings_from_bit_rate(ic);
02090 }
02091 update_stream_timings(ic);
02092
02093 {
02094 int i;
02095 AVStream av_unused *st;
02096 for(i = 0;i < ic->nb_streams; i++) {
02097 st = ic->streams[i];
02098 av_dlog(ic, "%d: start_time: %0.3f duration: %0.3f\n", i,
02099 (double) st->start_time / AV_TIME_BASE,
02100 (double) st->duration / AV_TIME_BASE);
02101 }
02102 av_dlog(ic, "stream: start_time: %0.3f duration: %0.3f bitrate=%d kb/s\n",
02103 (double) ic->start_time / AV_TIME_BASE,
02104 (double) ic->duration / AV_TIME_BASE,
02105 ic->bit_rate / 1000);
02106 }
02107 }
02108
02109 static int has_codec_parameters(AVCodecContext *avctx)
02110 {
02111 int val;
02112 switch (avctx->codec_type) {
02113 case AVMEDIA_TYPE_AUDIO:
02114 val = avctx->sample_rate && avctx->channels && avctx->sample_fmt != AV_SAMPLE_FMT_NONE;
02115 if (!avctx->frame_size &&
02116 (avctx->codec_id == CODEC_ID_VORBIS ||
02117 avctx->codec_id == CODEC_ID_AAC ||
02118 avctx->codec_id == CODEC_ID_MP1 ||
02119 avctx->codec_id == CODEC_ID_MP2 ||
02120 avctx->codec_id == CODEC_ID_MP3 ||
02121 avctx->codec_id == CODEC_ID_CELT))
02122 return 0;
02123 break;
02124 case AVMEDIA_TYPE_VIDEO:
02125 val = avctx->width && avctx->pix_fmt != PIX_FMT_NONE;
02126 break;
02127 default:
02128 val = 1;
02129 break;
02130 }
02131 return avctx->codec_id != CODEC_ID_NONE && val != 0;
02132 }
02133
02134 static int has_decode_delay_been_guessed(AVStream *st)
02135 {
02136 return st->codec->codec_id != CODEC_ID_H264 ||
02137 st->info->nb_decoded_frames >= 6;
02138 }
02139
02140
02141 static int try_decode_frame(AVStream *st, AVPacket *avpkt, AVDictionary **options)
02142 {
02143 AVCodec *codec;
02144 int got_picture = 1, ret = 0;
02145 AVFrame picture;
02146 AVPacket pkt = *avpkt;
02147
02148 if (!avcodec_is_open(st->codec)) {
02149 AVDictionary *thread_opt = NULL;
02150
02151 codec = st->codec->codec ? st->codec->codec :
02152 avcodec_find_decoder(st->codec->codec_id);
02153
02154 if (!codec)
02155 return -1;
02156
02157
02158
02159 av_dict_set(options ? options : &thread_opt, "threads", "1", 0);
02160 ret = avcodec_open2(st->codec, codec, options ? options : &thread_opt);
02161 if (!options)
02162 av_dict_free(&thread_opt);
02163 if (ret < 0)
02164 return ret;
02165 }
02166
02167 while ((pkt.size > 0 || (!pkt.data && got_picture)) &&
02168 ret >= 0 &&
02169 (!has_codec_parameters(st->codec) ||
02170 !has_decode_delay_been_guessed(st) ||
02171 (!st->codec_info_nb_frames && st->codec->codec->capabilities & CODEC_CAP_CHANNEL_CONF))) {
02172 got_picture = 0;
02173 avcodec_get_frame_defaults(&picture);
02174 switch(st->codec->codec_type) {
02175 case AVMEDIA_TYPE_VIDEO:
02176 ret = avcodec_decode_video2(st->codec, &picture,
02177 &got_picture, &pkt);
02178 break;
02179 case AVMEDIA_TYPE_AUDIO:
02180 ret = avcodec_decode_audio4(st->codec, &picture, &got_picture, &pkt);
02181 break;
02182 default:
02183 break;
02184 }
02185 if (ret >= 0) {
02186 if (got_picture)
02187 st->info->nb_decoded_frames++;
02188 pkt.data += ret;
02189 pkt.size -= ret;
02190 ret = got_picture;
02191 }
02192 }
02193 return ret;
02194 }
02195
02196 unsigned int ff_codec_get_tag(const AVCodecTag *tags, enum CodecID id)
02197 {
02198 while (tags->id != CODEC_ID_NONE) {
02199 if (tags->id == id)
02200 return tags->tag;
02201 tags++;
02202 }
02203 return 0;
02204 }
02205
02206 enum CodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
02207 {
02208 int i;
02209 for(i=0; tags[i].id != CODEC_ID_NONE;i++) {
02210 if(tag == tags[i].tag)
02211 return tags[i].id;
02212 }
02213 for(i=0; tags[i].id != CODEC_ID_NONE; i++) {
02214 if (avpriv_toupper4(tag) == avpriv_toupper4(tags[i].tag))
02215 return tags[i].id;
02216 }
02217 return CODEC_ID_NONE;
02218 }
02219
02220 unsigned int av_codec_get_tag(const AVCodecTag * const *tags, enum CodecID id)
02221 {
02222 int i;
02223 for(i=0; tags && tags[i]; i++){
02224 int tag= ff_codec_get_tag(tags[i], id);
02225 if(tag) return tag;
02226 }
02227 return 0;
02228 }
02229
02230 enum CodecID av_codec_get_id(const AVCodecTag * const *tags, unsigned int tag)
02231 {
02232 int i;
02233 for(i=0; tags && tags[i]; i++){
02234 enum CodecID id= ff_codec_get_id(tags[i], tag);
02235 if(id!=CODEC_ID_NONE) return id;
02236 }
02237 return CODEC_ID_NONE;
02238 }
02239
02240 static void compute_chapters_end(AVFormatContext *s)
02241 {
02242 unsigned int i, j;
02243 int64_t max_time = s->duration + ((s->start_time == AV_NOPTS_VALUE) ? 0 : s->start_time);
02244
02245 for (i = 0; i < s->nb_chapters; i++)
02246 if (s->chapters[i]->end == AV_NOPTS_VALUE) {
02247 AVChapter *ch = s->chapters[i];
02248 int64_t end = max_time ? av_rescale_q(max_time, AV_TIME_BASE_Q, ch->time_base)
02249 : INT64_MAX;
02250
02251 for (j = 0; j < s->nb_chapters; j++) {
02252 AVChapter *ch1 = s->chapters[j];
02253 int64_t next_start = av_rescale_q(ch1->start, ch1->time_base, ch->time_base);
02254 if (j != i && next_start > ch->start && next_start < end)
02255 end = next_start;
02256 }
02257 ch->end = (end == INT64_MAX) ? ch->start : end;
02258 }
02259 }
02260
02261 static int get_std_framerate(int i){
02262 if(i<60*12) return i*1001;
02263 else return ((const int[]){24,30,60,12,15})[i-60*12]*1000*12;
02264 }
02265
02266
02267
02268
02269
02270
02271
02272
02273
02274 static int tb_unreliable(AVCodecContext *c){
02275 if( c->time_base.den >= 101L*c->time_base.num
02276 || c->time_base.den < 5L*c->time_base.num
02277
02278
02279 || c->codec_id == CODEC_ID_MPEG2VIDEO
02280 || c->codec_id == CODEC_ID_H264
02281 )
02282 return 1;
02283 return 0;
02284 }
02285
02286 #if FF_API_FORMAT_PARAMETERS
02287 int av_find_stream_info(AVFormatContext *ic)
02288 {
02289 return avformat_find_stream_info(ic, NULL);
02290 }
02291 #endif
02292
02293 int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options)
02294 {
02295 int i, count, ret, read_size, j;
02296 AVStream *st;
02297 AVPacket pkt1, *pkt;
02298 int64_t old_offset = avio_tell(ic->pb);
02299 int orig_nb_streams = ic->nb_streams;
02300
02301 for(i=0;i<ic->nb_streams;i++) {
02302 AVCodec *codec;
02303 AVDictionary *thread_opt = NULL;
02304 st = ic->streams[i];
02305
02306 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO ||
02307 st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE) {
02308
02309
02310 if(!st->codec->time_base.num)
02311 st->codec->time_base= st->time_base;
02312 }
02313
02314 if (!st->parser && !(ic->flags & AVFMT_FLAG_NOPARSE)) {
02315 st->parser = av_parser_init(st->codec->codec_id);
02316 if(st->need_parsing == AVSTREAM_PARSE_HEADERS && st->parser){
02317 st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;
02318 }
02319 }
02320 codec = st->codec->codec ? st->codec->codec :
02321 avcodec_find_decoder(st->codec->codec_id);
02322
02323
02324
02325 av_dict_set(options ? &options[i] : &thread_opt, "threads", "1", 0);
02326
02327
02328 if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE
02329 && codec && !st->codec->codec)
02330 avcodec_open2(st->codec, codec, options ? &options[i]
02331 : &thread_opt);
02332
02333
02334 if(!has_codec_parameters(st->codec)){
02335 if (codec && !st->codec->codec)
02336 avcodec_open2(st->codec, codec, options ? &options[i]
02337 : &thread_opt);
02338 }
02339 if (!options)
02340 av_dict_free(&thread_opt);
02341 }
02342
02343 for (i=0; i<ic->nb_streams; i++) {
02344 ic->streams[i]->info->last_dts = AV_NOPTS_VALUE;
02345 }
02346
02347 count = 0;
02348 read_size = 0;
02349 for(;;) {
02350 if (ff_check_interrupt(&ic->interrupt_callback)){
02351 ret= AVERROR_EXIT;
02352 av_log(ic, AV_LOG_DEBUG, "interrupted\n");
02353 break;
02354 }
02355
02356
02357 for(i=0;i<ic->nb_streams;i++) {
02358 int fps_analyze_framecount = 20;
02359
02360 st = ic->streams[i];
02361 if (!has_codec_parameters(st->codec))
02362 break;
02363
02364
02365
02366 if (av_q2d(st->time_base) > 0.0005)
02367 fps_analyze_framecount *= 2;
02368 if (ic->fps_probe_size >= 0)
02369 fps_analyze_framecount = ic->fps_probe_size;
02370
02371 if( tb_unreliable(st->codec) && !(st->r_frame_rate.num && st->avg_frame_rate.num)
02372 && st->info->duration_count < fps_analyze_framecount
02373 && st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
02374 break;
02375 if(st->parser && st->parser->parser->split && !st->codec->extradata)
02376 break;
02377 if(st->first_dts == AV_NOPTS_VALUE)
02378 break;
02379 }
02380 if (i == ic->nb_streams) {
02381
02382
02383
02384 if (!(ic->ctx_flags & AVFMTCTX_NOHEADER)) {
02385
02386 ret = count;
02387 av_log(ic, AV_LOG_DEBUG, "All info found\n");
02388 break;
02389 }
02390 }
02391
02392 if (read_size >= ic->probesize) {
02393 ret = count;
02394 av_log(ic, AV_LOG_DEBUG, "Probe buffer size limit %d reached\n", ic->probesize);
02395 break;
02396 }
02397
02398
02399
02400 ret = read_frame_internal(ic, &pkt1);
02401 if (ret == AVERROR(EAGAIN))
02402 continue;
02403
02404 if (ret < 0) {
02405
02406 AVPacket empty_pkt = { 0 };
02407 int err;
02408 av_init_packet(&empty_pkt);
02409
02410 ret = -1;
02411 for(i=0;i<ic->nb_streams;i++) {
02412 st = ic->streams[i];
02413
02414
02415 do {
02416 err = try_decode_frame(st, &empty_pkt,
02417 (options && i < orig_nb_streams) ?
02418 &options[i] : NULL);
02419 } while (err > 0 && !has_codec_parameters(st->codec));
02420
02421 if (err < 0) {
02422 av_log(ic, AV_LOG_WARNING,
02423 "decoding for stream %d failed\n", st->index);
02424 } else if (!has_codec_parameters(st->codec)){
02425 char buf[256];
02426 avcodec_string(buf, sizeof(buf), st->codec, 0);
02427 av_log(ic, AV_LOG_WARNING,
02428 "Could not find codec parameters (%s)\n", buf);
02429 } else {
02430 ret = 0;
02431 }
02432 }
02433 break;
02434 }
02435
02436 pkt= add_to_pktbuf(&ic->packet_buffer, &pkt1, &ic->packet_buffer_end);
02437 if ((ret = av_dup_packet(pkt)) < 0)
02438 goto find_stream_info_err;
02439
02440 read_size += pkt->size;
02441
02442 st = ic->streams[pkt->stream_index];
02443 if (st->codec_info_nb_frames>1) {
02444 if (st->time_base.den > 0 && av_rescale_q(st->info->codec_info_duration, st->time_base, AV_TIME_BASE_Q) >= ic->max_analyze_duration) {
02445 av_log(ic, AV_LOG_WARNING, "max_analyze_duration reached\n");
02446 break;
02447 }
02448 st->info->codec_info_duration += pkt->duration;
02449 }
02450 {
02451 int64_t last = st->info->last_dts;
02452
02453 if(pkt->dts != AV_NOPTS_VALUE && last != AV_NOPTS_VALUE && pkt->dts > last){
02454 int64_t duration= pkt->dts - last;
02455 double dur= duration * av_q2d(st->time_base);
02456
02457
02458
02459 if (st->info->duration_count < 2)
02460 memset(st->info->duration_error, 0, sizeof(st->info->duration_error));
02461 for (i=1; i<FF_ARRAY_ELEMS(st->info->duration_error); i++) {
02462 int framerate= get_std_framerate(i);
02463 int ticks= lrintf(dur*framerate/(1001*12));
02464 double error = dur - (double)ticks*1001*12 / framerate;
02465 st->info->duration_error[i] += error*error;
02466 }
02467 st->info->duration_count++;
02468
02469 if (st->info->duration_count > 3)
02470 st->info->duration_gcd = av_gcd(st->info->duration_gcd, duration);
02471 }
02472 if (last == AV_NOPTS_VALUE || st->info->duration_count <= 1)
02473 st->info->last_dts = pkt->dts;
02474 }
02475 if(st->parser && st->parser->parser->split && !st->codec->extradata){
02476 int i= st->parser->parser->split(st->codec, pkt->data, pkt->size);
02477 if (i > 0 && i < FF_MAX_EXTRADATA_SIZE) {
02478 st->codec->extradata_size= i;
02479 st->codec->extradata= av_malloc(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
02480 if (!st->codec->extradata)
02481 return AVERROR(ENOMEM);
02482 memcpy(st->codec->extradata, pkt->data, st->codec->extradata_size);
02483 memset(st->codec->extradata + i, 0, FF_INPUT_BUFFER_PADDING_SIZE);
02484 }
02485 }
02486
02487
02488
02489
02490
02491
02492
02493
02494
02495
02496 try_decode_frame(st, pkt, (options && i < orig_nb_streams ) ? &options[i] : NULL);
02497
02498 st->codec_info_nb_frames++;
02499 count++;
02500 }
02501
02502
02503 for(i=0;i<ic->nb_streams;i++) {
02504 st = ic->streams[i];
02505 avcodec_close(st->codec);
02506 }
02507 for(i=0;i<ic->nb_streams;i++) {
02508 st = ic->streams[i];
02509 if (st->codec_info_nb_frames>2 && !st->avg_frame_rate.num && st->info->codec_info_duration)
02510 av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
02511 (st->codec_info_nb_frames-2)*(int64_t)st->time_base.den,
02512 st->info->codec_info_duration*(int64_t)st->time_base.num, 60000);
02513 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
02514
02515
02516
02517 if (tb_unreliable(st->codec) && st->info->duration_count > 15 && st->info->duration_gcd > 1 && !st->r_frame_rate.num)
02518 av_reduce(&st->r_frame_rate.num, &st->r_frame_rate.den, st->time_base.den, st->time_base.num * st->info->duration_gcd, INT_MAX);
02519 if (st->info->duration_count && !st->r_frame_rate.num
02520 && tb_unreliable(st->codec)
02521
02522 ){
02523 int num = 0;
02524 double best_error= 2*av_q2d(st->time_base);
02525 best_error = best_error*best_error*st->info->duration_count*1000*12*30;
02526
02527 for (j=1; j<FF_ARRAY_ELEMS(st->info->duration_error); j++) {
02528 double error = st->info->duration_error[j] * get_std_framerate(j);
02529
02530
02531 if(error < best_error){
02532 best_error= error;
02533 num = get_std_framerate(j);
02534 }
02535 }
02536
02537 if (num && (!st->r_frame_rate.num || (double)num/(12*1001) < 1.01 * av_q2d(st->r_frame_rate)))
02538 av_reduce(&st->r_frame_rate.num, &st->r_frame_rate.den, num, 12*1001, INT_MAX);
02539 }
02540
02541 if (!st->r_frame_rate.num){
02542 if( st->codec->time_base.den * (int64_t)st->time_base.num
02543 <= st->codec->time_base.num * st->codec->ticks_per_frame * (int64_t)st->time_base.den){
02544 st->r_frame_rate.num = st->codec->time_base.den;
02545 st->r_frame_rate.den = st->codec->time_base.num * st->codec->ticks_per_frame;
02546 }else{
02547 st->r_frame_rate.num = st->time_base.den;
02548 st->r_frame_rate.den = st->time_base.num;
02549 }
02550 }
02551 }else if(st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
02552 if(!st->codec->bits_per_coded_sample)
02553 st->codec->bits_per_coded_sample= av_get_bits_per_sample(st->codec->codec_id);
02554
02555 switch (st->codec->audio_service_type) {
02556 case AV_AUDIO_SERVICE_TYPE_EFFECTS:
02557 st->disposition = AV_DISPOSITION_CLEAN_EFFECTS; break;
02558 case AV_AUDIO_SERVICE_TYPE_VISUALLY_IMPAIRED:
02559 st->disposition = AV_DISPOSITION_VISUAL_IMPAIRED; break;
02560 case AV_AUDIO_SERVICE_TYPE_HEARING_IMPAIRED:
02561 st->disposition = AV_DISPOSITION_HEARING_IMPAIRED; break;
02562 case AV_AUDIO_SERVICE_TYPE_COMMENTARY:
02563 st->disposition = AV_DISPOSITION_COMMENT; break;
02564 case AV_AUDIO_SERVICE_TYPE_KARAOKE:
02565 st->disposition = AV_DISPOSITION_KARAOKE; break;
02566 }
02567 }
02568 }
02569
02570 estimate_timings(ic, old_offset);
02571
02572 compute_chapters_end(ic);
02573
02574 #if 0
02575
02576 for(i=0;i<ic->nb_streams;i++) {
02577 st = ic->streams[i];
02578 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
02579 if(b-frames){
02580 ppktl = &ic->packet_buffer;
02581 while(ppkt1){
02582 if(ppkt1->stream_index != i)
02583 continue;
02584 if(ppkt1->pkt->dts < 0)
02585 break;
02586 if(ppkt1->pkt->pts != AV_NOPTS_VALUE)
02587 break;
02588 ppkt1->pkt->dts -= delta;
02589 ppkt1= ppkt1->next;
02590 }
02591 if(ppkt1)
02592 continue;
02593 st->cur_dts -= delta;
02594 }
02595 }
02596 }
02597 #endif
02598
02599 find_stream_info_err:
02600 for (i=0; i < ic->nb_streams; i++) {
02601 if (ic->streams[i]->codec)
02602 ic->streams[i]->codec->thread_count = 0;
02603 av_freep(&ic->streams[i]->info);
02604 }
02605 return ret;
02606 }
02607
02608 static AVProgram *find_program_from_stream(AVFormatContext *ic, int s)
02609 {
02610 int i, j;
02611
02612 for (i = 0; i < ic->nb_programs; i++)
02613 for (j = 0; j < ic->programs[i]->nb_stream_indexes; j++)
02614 if (ic->programs[i]->stream_index[j] == s)
02615 return ic->programs[i];
02616 return NULL;
02617 }
02618
02619 int av_find_best_stream(AVFormatContext *ic,
02620 enum AVMediaType type,
02621 int wanted_stream_nb,
02622 int related_stream,
02623 AVCodec **decoder_ret,
02624 int flags)
02625 {
02626 int i, nb_streams = ic->nb_streams;
02627 int ret = AVERROR_STREAM_NOT_FOUND, best_count = -1;
02628 unsigned *program = NULL;
02629 AVCodec *decoder = NULL, *best_decoder = NULL;
02630
02631 if (related_stream >= 0 && wanted_stream_nb < 0) {
02632 AVProgram *p = find_program_from_stream(ic, related_stream);
02633 if (p) {
02634 program = p->stream_index;
02635 nb_streams = p->nb_stream_indexes;
02636 }
02637 }
02638 for (i = 0; i < nb_streams; i++) {
02639 int real_stream_index = program ? program[i] : i;
02640 AVStream *st = ic->streams[real_stream_index];
02641 AVCodecContext *avctx = st->codec;
02642 if (avctx->codec_type != type)
02643 continue;
02644 if (wanted_stream_nb >= 0 && real_stream_index != wanted_stream_nb)
02645 continue;
02646 if (st->disposition & (AV_DISPOSITION_HEARING_IMPAIRED|AV_DISPOSITION_VISUAL_IMPAIRED))
02647 continue;
02648 if (decoder_ret) {
02649 decoder = avcodec_find_decoder(st->codec->codec_id);
02650 if (!decoder) {
02651 if (ret < 0)
02652 ret = AVERROR_DECODER_NOT_FOUND;
02653 continue;
02654 }
02655 }
02656 if (best_count >= st->codec_info_nb_frames)
02657 continue;
02658 best_count = st->codec_info_nb_frames;
02659 ret = real_stream_index;
02660 best_decoder = decoder;
02661 if (program && i == nb_streams - 1 && ret < 0) {
02662 program = NULL;
02663 nb_streams = ic->nb_streams;
02664 i = 0;
02665 }
02666 }
02667 if (decoder_ret)
02668 *decoder_ret = best_decoder;
02669 return ret;
02670 }
02671
02672
02673
02674 int av_read_play(AVFormatContext *s)
02675 {
02676 if (s->iformat->read_play)
02677 return s->iformat->read_play(s);
02678 if (s->pb)
02679 return avio_pause(s->pb, 0);
02680 return AVERROR(ENOSYS);
02681 }
02682
02683 int av_read_pause(AVFormatContext *s)
02684 {
02685 if (s->iformat->read_pause)
02686 return s->iformat->read_pause(s);
02687 if (s->pb)
02688 return avio_pause(s->pb, 1);
02689 return AVERROR(ENOSYS);
02690 }
02691
02692 #if FF_API_FORMAT_PARAMETERS
02693 void av_close_input_stream(AVFormatContext *s)
02694 {
02695 flush_packet_queue(s);
02696 if (s->iformat->read_close)
02697 s->iformat->read_close(s);
02698 avformat_free_context(s);
02699 }
02700 #endif
02701
02702 void avformat_free_context(AVFormatContext *s)
02703 {
02704 int i;
02705 AVStream *st;
02706
02707 av_opt_free(s);
02708 if (s->iformat && s->iformat->priv_class && s->priv_data)
02709 av_opt_free(s->priv_data);
02710
02711 for(i=0;i<s->nb_streams;i++) {
02712
02713 st = s->streams[i];
02714 if (st->parser) {
02715 av_parser_close(st->parser);
02716 av_free_packet(&st->cur_pkt);
02717 }
02718 av_dict_free(&st->metadata);
02719 av_freep(&st->probe_data.buf);
02720 av_free(st->index_entries);
02721 av_free(st->codec->extradata);
02722 av_free(st->codec->subtitle_header);
02723 av_free(st->codec);
02724 av_free(st->priv_data);
02725 av_free(st->info);
02726 av_free(st);
02727 }
02728 for(i=s->nb_programs-1; i>=0; i--) {
02729 av_dict_free(&s->programs[i]->metadata);
02730 av_freep(&s->programs[i]->stream_index);
02731 av_freep(&s->programs[i]);
02732 }
02733 av_freep(&s->programs);
02734 av_freep(&s->priv_data);
02735 while(s->nb_chapters--) {
02736 av_dict_free(&s->chapters[s->nb_chapters]->metadata);
02737 av_free(s->chapters[s->nb_chapters]);
02738 }
02739 av_freep(&s->chapters);
02740 av_dict_free(&s->metadata);
02741 av_freep(&s->streams);
02742 av_free(s);
02743 }
02744
02745 #if FF_API_CLOSE_INPUT_FILE
02746 void av_close_input_file(AVFormatContext *s)
02747 {
02748 avformat_close_input(&s);
02749 }
02750 #endif
02751
02752 void avformat_close_input(AVFormatContext **ps)
02753 {
02754 AVFormatContext *s = *ps;
02755 AVIOContext *pb = (s->iformat->flags & AVFMT_NOFILE) || (s->flags & AVFMT_FLAG_CUSTOM_IO) ?
02756 NULL : s->pb;
02757 flush_packet_queue(s);
02758 if (s->iformat->read_close)
02759 s->iformat->read_close(s);
02760 avformat_free_context(s);
02761 *ps = NULL;
02762 if (pb)
02763 avio_close(pb);
02764 }
02765
02766 #if FF_API_NEW_STREAM
02767 AVStream *av_new_stream(AVFormatContext *s, int id)
02768 {
02769 AVStream *st = avformat_new_stream(s, NULL);
02770 if (st)
02771 st->id = id;
02772 return st;
02773 }
02774 #endif
02775
02776 AVStream *avformat_new_stream(AVFormatContext *s, AVCodec *c)
02777 {
02778 AVStream *st;
02779 int i;
02780 AVStream **streams;
02781
02782 if (s->nb_streams >= INT_MAX/sizeof(*streams))
02783 return NULL;
02784 streams = av_realloc(s->streams, (s->nb_streams + 1) * sizeof(*streams));
02785 if (!streams)
02786 return NULL;
02787 s->streams = streams;
02788
02789 st = av_mallocz(sizeof(AVStream));
02790 if (!st)
02791 return NULL;
02792 if (!(st->info = av_mallocz(sizeof(*st->info)))) {
02793 av_free(st);
02794 return NULL;
02795 }
02796
02797 st->codec = avcodec_alloc_context3(c);
02798 if (s->iformat) {
02799
02800 st->codec->bit_rate = 0;
02801 }
02802 st->index = s->nb_streams;
02803 st->start_time = AV_NOPTS_VALUE;
02804 st->duration = AV_NOPTS_VALUE;
02805
02806
02807
02808
02809 st->cur_dts = 0;
02810 st->first_dts = AV_NOPTS_VALUE;
02811 st->probe_packets = MAX_PROBE_PACKETS;
02812
02813
02814 avpriv_set_pts_info(st, 33, 1, 90000);
02815 st->last_IP_pts = AV_NOPTS_VALUE;
02816 for(i=0; i<MAX_REORDER_DELAY+1; i++)
02817 st->pts_buffer[i]= AV_NOPTS_VALUE;
02818 st->reference_dts = AV_NOPTS_VALUE;
02819
02820 st->sample_aspect_ratio = (AVRational){0,1};
02821
02822 s->streams[s->nb_streams++] = st;
02823 return st;
02824 }
02825
02826 AVProgram *av_new_program(AVFormatContext *ac, int id)
02827 {
02828 AVProgram *program=NULL;
02829 int i;
02830
02831 av_dlog(ac, "new_program: id=0x%04x\n", id);
02832
02833 for(i=0; i<ac->nb_programs; i++)
02834 if(ac->programs[i]->id == id)
02835 program = ac->programs[i];
02836
02837 if(!program){
02838 program = av_mallocz(sizeof(AVProgram));
02839 if (!program)
02840 return NULL;
02841 dynarray_add(&ac->programs, &ac->nb_programs, program);
02842 program->discard = AVDISCARD_NONE;
02843 }
02844 program->id = id;
02845
02846 return program;
02847 }
02848
02849 AVChapter *avpriv_new_chapter(AVFormatContext *s, int id, AVRational time_base, int64_t start, int64_t end, const char *title)
02850 {
02851 AVChapter *chapter = NULL;
02852 int i;
02853
02854 for(i=0; i<s->nb_chapters; i++)
02855 if(s->chapters[i]->id == id)
02856 chapter = s->chapters[i];
02857
02858 if(!chapter){
02859 chapter= av_mallocz(sizeof(AVChapter));
02860 if(!chapter)
02861 return NULL;
02862 dynarray_add(&s->chapters, &s->nb_chapters, chapter);
02863 }
02864 av_dict_set(&chapter->metadata, "title", title, 0);
02865 chapter->id = id;
02866 chapter->time_base= time_base;
02867 chapter->start = start;
02868 chapter->end = end;
02869
02870 return chapter;
02871 }
02872
02873
02874
02875
02876 #if FF_API_FORMAT_PARAMETERS
02877 int av_set_parameters(AVFormatContext *s, AVFormatParameters *ap)
02878 {
02879 int ret;
02880
02881 if (s->oformat->priv_data_size > 0) {
02882 s->priv_data = av_mallocz(s->oformat->priv_data_size);
02883 if (!s->priv_data)
02884 return AVERROR(ENOMEM);
02885 if (s->oformat->priv_class) {
02886 *(const AVClass**)s->priv_data= s->oformat->priv_class;
02887 av_opt_set_defaults(s->priv_data);
02888 }
02889 } else
02890 s->priv_data = NULL;
02891
02892 if (s->oformat->set_parameters) {
02893 ret = s->oformat->set_parameters(s, ap);
02894 if (ret < 0)
02895 return ret;
02896 }
02897 return 0;
02898 }
02899 #endif
02900
02901 static int validate_codec_tag(AVFormatContext *s, AVStream *st)
02902 {
02903 const AVCodecTag *avctag;
02904 int n;
02905 enum CodecID id = CODEC_ID_NONE;
02906 unsigned int tag = 0;
02907
02914 for (n = 0; s->oformat->codec_tag[n]; n++) {
02915 avctag = s->oformat->codec_tag[n];
02916 while (avctag->id != CODEC_ID_NONE) {
02917 if (avpriv_toupper4(avctag->tag) == avpriv_toupper4(st->codec->codec_tag)) {
02918 id = avctag->id;
02919 if (id == st->codec->codec_id)
02920 return 1;
02921 }
02922 if (avctag->id == st->codec->codec_id)
02923 tag = avctag->tag;
02924 avctag++;
02925 }
02926 }
02927 if (id != CODEC_ID_NONE)
02928 return 0;
02929 if (tag && (st->codec->strict_std_compliance >= FF_COMPLIANCE_NORMAL))
02930 return 0;
02931 return 1;
02932 }
02933
02934 #if FF_API_FORMAT_PARAMETERS
02935 int av_write_header(AVFormatContext *s)
02936 {
02937 return avformat_write_header(s, NULL);
02938 }
02939 #endif
02940
02941 int avformat_write_header(AVFormatContext *s, AVDictionary **options)
02942 {
02943 int ret = 0, i;
02944 AVStream *st;
02945 AVDictionary *tmp = NULL;
02946
02947 if (options)
02948 av_dict_copy(&tmp, *options, 0);
02949 if ((ret = av_opt_set_dict(s, &tmp)) < 0)
02950 goto fail;
02951
02952
02953 if (s->nb_streams == 0 && !(s->oformat->flags & AVFMT_NOSTREAMS)) {
02954 av_log(s, AV_LOG_ERROR, "no streams\n");
02955 ret = AVERROR(EINVAL);
02956 goto fail;
02957 }
02958
02959 for(i=0;i<s->nb_streams;i++) {
02960 st = s->streams[i];
02961
02962 switch (st->codec->codec_type) {
02963 case AVMEDIA_TYPE_AUDIO:
02964 if(st->codec->sample_rate<=0){
02965 av_log(s, AV_LOG_ERROR, "sample rate not set\n");
02966 ret = AVERROR(EINVAL);
02967 goto fail;
02968 }
02969 if(!st->codec->block_align)
02970 st->codec->block_align = st->codec->channels *
02971 av_get_bits_per_sample(st->codec->codec_id) >> 3;
02972 break;
02973 case AVMEDIA_TYPE_VIDEO:
02974 if(st->codec->time_base.num<=0 || st->codec->time_base.den<=0){
02975 av_log(s, AV_LOG_ERROR, "time base not set\n");
02976 ret = AVERROR(EINVAL);
02977 goto fail;
02978 }
02979 if((st->codec->width<=0 || st->codec->height<=0) && !(s->oformat->flags & AVFMT_NODIMENSIONS)){
02980 av_log(s, AV_LOG_ERROR, "dimensions not set\n");
02981 ret = AVERROR(EINVAL);
02982 goto fail;
02983 }
02984 if(av_cmp_q(st->sample_aspect_ratio, st->codec->sample_aspect_ratio)){
02985 av_log(s, AV_LOG_ERROR, "Aspect ratio mismatch between encoder and muxer layer\n");
02986 ret = AVERROR(EINVAL);
02987 goto fail;
02988 }
02989 break;
02990 }
02991
02992 if(s->oformat->codec_tag){
02993 if(st->codec->codec_tag && st->codec->codec_id == CODEC_ID_RAWVIDEO && av_codec_get_tag(s->oformat->codec_tag, st->codec->codec_id) == 0 && !validate_codec_tag(s, st)){
02994
02995 st->codec->codec_tag= 0;
02996 }
02997 if(st->codec->codec_tag){
02998 if (!validate_codec_tag(s, st)) {
02999 char tagbuf[32];
03000 av_get_codec_tag_string(tagbuf, sizeof(tagbuf), st->codec->codec_tag);
03001 av_log(s, AV_LOG_ERROR,
03002 "Tag %s/0x%08x incompatible with output codec id '%d'\n",
03003 tagbuf, st->codec->codec_tag, st->codec->codec_id);
03004 ret = AVERROR_INVALIDDATA;
03005 goto fail;
03006 }
03007 }else
03008 st->codec->codec_tag= av_codec_get_tag(s->oformat->codec_tag, st->codec->codec_id);
03009 }
03010
03011 if(s->oformat->flags & AVFMT_GLOBALHEADER &&
03012 !(st->codec->flags & CODEC_FLAG_GLOBAL_HEADER))
03013 av_log(s, AV_LOG_WARNING, "Codec for stream %d does not use global headers but container format requires global headers\n", i);
03014 }
03015
03016 if (!s->priv_data && s->oformat->priv_data_size > 0) {
03017 s->priv_data = av_mallocz(s->oformat->priv_data_size);
03018 if (!s->priv_data) {
03019 ret = AVERROR(ENOMEM);
03020 goto fail;
03021 }
03022 if (s->oformat->priv_class) {
03023 *(const AVClass**)s->priv_data= s->oformat->priv_class;
03024 av_opt_set_defaults(s->priv_data);
03025 if ((ret = av_opt_set_dict(s->priv_data, &tmp)) < 0)
03026 goto fail;
03027 }
03028 }
03029
03030
03031 if (s->nb_streams && !(s->streams[0]->codec->flags & CODEC_FLAG_BITEXACT)) {
03032 av_dict_set(&s->metadata, "encoder", LIBAVFORMAT_IDENT, 0);
03033 }
03034
03035 if(s->oformat->write_header){
03036 ret = s->oformat->write_header(s);
03037 if (ret < 0)
03038 goto fail;
03039 }
03040
03041
03042 for(i=0;i<s->nb_streams;i++) {
03043 int64_t den = AV_NOPTS_VALUE;
03044 st = s->streams[i];
03045
03046 switch (st->codec->codec_type) {
03047 case AVMEDIA_TYPE_AUDIO:
03048 den = (int64_t)st->time_base.num * st->codec->sample_rate;
03049 break;
03050 case AVMEDIA_TYPE_VIDEO:
03051 den = (int64_t)st->time_base.num * st->codec->time_base.den;
03052 break;
03053 default:
03054 break;
03055 }
03056 if (den != AV_NOPTS_VALUE) {
03057 if (den <= 0) {
03058 ret = AVERROR_INVALIDDATA;
03059 goto fail;
03060 }
03061 frac_init(&st->pts, 0, 0, den);
03062 }
03063 }
03064
03065 if (options) {
03066 av_dict_free(options);
03067 *options = tmp;
03068 }
03069 return 0;
03070 fail:
03071 av_dict_free(&tmp);
03072 return ret;
03073 }
03074
03075
03076 static int compute_pkt_fields2(AVFormatContext *s, AVStream *st, AVPacket *pkt){
03077 int delay = FFMAX(st->codec->has_b_frames, !!st->codec->max_b_frames);
03078 int num, den, frame_size, i;
03079
03080 av_dlog(s, "compute_pkt_fields2: pts:%"PRId64" dts:%"PRId64" cur_dts:%"PRId64" b:%d size:%d st:%d\n",
03081 pkt->pts, pkt->dts, st->cur_dts, delay, pkt->size, pkt->stream_index);
03082
03083
03084
03085
03086
03087 if (pkt->duration == 0) {
03088 compute_frame_duration(&num, &den, st, NULL, pkt);
03089 if (den && num) {
03090 pkt->duration = av_rescale(1, num * (int64_t)st->time_base.den * st->codec->ticks_per_frame, den * (int64_t)st->time_base.num);
03091 }
03092 }
03093
03094 if(pkt->pts == AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE && delay==0)
03095 pkt->pts= pkt->dts;
03096
03097
03098 if((pkt->pts == 0 || pkt->pts == AV_NOPTS_VALUE) && pkt->dts == AV_NOPTS_VALUE && !delay){
03099 pkt->dts=
03100
03101 pkt->pts= st->pts.val;
03102 }
03103
03104
03105 if(pkt->pts != AV_NOPTS_VALUE && pkt->dts == AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY){
03106 st->pts_buffer[0]= pkt->pts;
03107 for(i=1; i<delay+1 && st->pts_buffer[i] == AV_NOPTS_VALUE; i++)
03108 st->pts_buffer[i]= pkt->pts + (i-delay-1) * pkt->duration;
03109 for(i=0; i<delay && st->pts_buffer[i] > st->pts_buffer[i+1]; i++)
03110 FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i+1]);
03111
03112 pkt->dts= st->pts_buffer[0];
03113 }
03114
03115 if(st->cur_dts && st->cur_dts != AV_NOPTS_VALUE && st->cur_dts >= pkt->dts){
03116 av_log(s, AV_LOG_ERROR,
03117 "Application provided invalid, non monotonically increasing dts to muxer in stream %d: %"PRId64" >= %"PRId64"\n",
03118 st->index, st->cur_dts, pkt->dts);
03119 return AVERROR(EINVAL);
03120 }
03121 if(pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts < pkt->dts){
03122 av_log(s, AV_LOG_ERROR, "pts < dts in stream %d\n", st->index);
03123 return AVERROR(EINVAL);
03124 }
03125
03126
03127 st->cur_dts= pkt->dts;
03128 st->pts.val= pkt->dts;
03129
03130
03131 switch (st->codec->codec_type) {
03132 case AVMEDIA_TYPE_AUDIO:
03133 frame_size = get_audio_frame_size(st->codec, pkt->size);
03134
03135
03136
03137
03138 if (frame_size >= 0 && (pkt->size || st->pts.num!=st->pts.den>>1 || st->pts.val)) {
03139 frac_add(&st->pts, (int64_t)st->time_base.den * frame_size);
03140 }
03141 break;
03142 case AVMEDIA_TYPE_VIDEO:
03143 frac_add(&st->pts, (int64_t)st->time_base.den * st->codec->time_base.num);
03144 break;
03145 default:
03146 break;
03147 }
03148 return 0;
03149 }
03150
03151 int av_write_frame(AVFormatContext *s, AVPacket *pkt)
03152 {
03153 int ret = compute_pkt_fields2(s, s->streams[pkt->stream_index], pkt);
03154
03155 if(ret<0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
03156 return ret;
03157
03158 ret= s->oformat->write_packet(s, pkt);
03159
03160 if (ret >= 0)
03161 s->streams[pkt->stream_index]->nb_frames++;
03162 return ret;
03163 }
03164
03165 void ff_interleave_add_packet(AVFormatContext *s, AVPacket *pkt,
03166 int (*compare)(AVFormatContext *, AVPacket *, AVPacket *))
03167 {
03168 AVPacketList **next_point, *this_pktl;
03169
03170 this_pktl = av_mallocz(sizeof(AVPacketList));
03171 this_pktl->pkt= *pkt;
03172 pkt->destruct= NULL;
03173 av_dup_packet(&this_pktl->pkt);
03174
03175 if(s->streams[pkt->stream_index]->last_in_packet_buffer){
03176 next_point = &(s->streams[pkt->stream_index]->last_in_packet_buffer->next);
03177 }else
03178 next_point = &s->packet_buffer;
03179
03180 if(*next_point){
03181 if(compare(s, &s->packet_buffer_end->pkt, pkt)){
03182 while(!compare(s, &(*next_point)->pkt, pkt)){
03183 next_point= &(*next_point)->next;
03184 }
03185 goto next_non_null;
03186 }else{
03187 next_point = &(s->packet_buffer_end->next);
03188 }
03189 }
03190 assert(!*next_point);
03191
03192 s->packet_buffer_end= this_pktl;
03193 next_non_null:
03194
03195 this_pktl->next= *next_point;
03196
03197 s->streams[pkt->stream_index]->last_in_packet_buffer=
03198 *next_point= this_pktl;
03199 }
03200
03201 static int ff_interleave_compare_dts(AVFormatContext *s, AVPacket *next, AVPacket *pkt)
03202 {
03203 AVStream *st = s->streams[ pkt ->stream_index];
03204 AVStream *st2= s->streams[ next->stream_index];
03205 int comp = av_compare_ts(next->dts, st2->time_base, pkt->dts,
03206 st->time_base);
03207
03208 if (comp == 0)
03209 return pkt->stream_index < next->stream_index;
03210 return comp > 0;
03211 }
03212
03213 int av_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush){
03214 AVPacketList *pktl;
03215 int stream_count=0;
03216 int i;
03217
03218 if(pkt){
03219 ff_interleave_add_packet(s, pkt, ff_interleave_compare_dts);
03220 }
03221
03222 for(i=0; i < s->nb_streams; i++)
03223 stream_count+= !!s->streams[i]->last_in_packet_buffer;
03224
03225 if(stream_count && (s->nb_streams == stream_count || flush)){
03226 pktl= s->packet_buffer;
03227 *out= pktl->pkt;
03228
03229 s->packet_buffer= pktl->next;
03230 if(!s->packet_buffer)
03231 s->packet_buffer_end= NULL;
03232
03233 if(s->streams[out->stream_index]->last_in_packet_buffer == pktl)
03234 s->streams[out->stream_index]->last_in_packet_buffer= NULL;
03235 av_freep(&pktl);
03236 return 1;
03237 }else{
03238 av_init_packet(out);
03239 return 0;
03240 }
03241 }
03242
03252 static int interleave_packet(AVFormatContext *s, AVPacket *out, AVPacket *in, int flush){
03253 if (s->oformat->interleave_packet) {
03254 int ret = s->oformat->interleave_packet(s, out, in, flush);
03255 if (in)
03256 av_free_packet(in);
03257 return ret;
03258 } else
03259 return av_interleave_packet_per_dts(s, out, in, flush);
03260 }
03261
03262 int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt){
03263 AVStream *st= s->streams[ pkt->stream_index];
03264 int ret;
03265
03266
03267 if(st->codec->codec_type == AVMEDIA_TYPE_AUDIO && pkt->size==0)
03268 return 0;
03269
03270 av_dlog(s, "av_interleaved_write_frame size:%d dts:%"PRId64" pts:%"PRId64"\n",
03271 pkt->size, pkt->dts, pkt->pts);
03272 if((ret = compute_pkt_fields2(s, st, pkt)) < 0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
03273 return ret;
03274
03275 if(pkt->dts == AV_NOPTS_VALUE && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
03276 return AVERROR(EINVAL);
03277
03278 for(;;){
03279 AVPacket opkt;
03280 int ret= interleave_packet(s, &opkt, pkt, 0);
03281 if(ret<=0)
03282 return ret;
03283
03284 ret= s->oformat->write_packet(s, &opkt);
03285 if (ret >= 0)
03286 s->streams[opkt.stream_index]->nb_frames++;
03287
03288 av_free_packet(&opkt);
03289 pkt= NULL;
03290
03291 if(ret<0)
03292 return ret;
03293 }
03294 }
03295
03296 int av_write_trailer(AVFormatContext *s)
03297 {
03298 int ret, i;
03299
03300 for(;;){
03301 AVPacket pkt;
03302 ret= interleave_packet(s, &pkt, NULL, 1);
03303 if(ret<0)
03304 goto fail;
03305 if(!ret)
03306 break;
03307
03308 ret= s->oformat->write_packet(s, &pkt);
03309 if (ret >= 0)
03310 s->streams[pkt.stream_index]->nb_frames++;
03311
03312 av_free_packet(&pkt);
03313
03314 if(ret<0)
03315 goto fail;
03316 }
03317
03318 if(s->oformat->write_trailer)
03319 ret = s->oformat->write_trailer(s);
03320 fail:
03321 for(i=0;i<s->nb_streams;i++) {
03322 av_freep(&s->streams[i]->priv_data);
03323 av_freep(&s->streams[i]->index_entries);
03324 }
03325 if (s->oformat->priv_class)
03326 av_opt_free(s->priv_data);
03327 av_freep(&s->priv_data);
03328 return ret;
03329 }
03330
03331 void ff_program_add_stream_index(AVFormatContext *ac, int progid, unsigned int idx)
03332 {
03333 int i, j;
03334 AVProgram *program=NULL;
03335 void *tmp;
03336
03337 if (idx >= ac->nb_streams) {
03338 av_log(ac, AV_LOG_ERROR, "stream index %d is not valid\n", idx);
03339 return;
03340 }
03341
03342 for(i=0; i<ac->nb_programs; i++){
03343 if(ac->programs[i]->id != progid)
03344 continue;
03345 program = ac->programs[i];
03346 for(j=0; j<program->nb_stream_indexes; j++)
03347 if(program->stream_index[j] == idx)
03348 return;
03349
03350 tmp = av_realloc(program->stream_index, sizeof(unsigned int)*(program->nb_stream_indexes+1));
03351 if(!tmp)
03352 return;
03353 program->stream_index = tmp;
03354 program->stream_index[program->nb_stream_indexes++] = idx;
03355 return;
03356 }
03357 }
03358
03359 static void print_fps(double d, const char *postfix){
03360 uint64_t v= lrintf(d*100);
03361 if (v% 100 ) av_log(NULL, AV_LOG_INFO, ", %3.2f %s", d, postfix);
03362 else if(v%(100*1000)) av_log(NULL, AV_LOG_INFO, ", %1.0f %s", d, postfix);
03363 else av_log(NULL, AV_LOG_INFO, ", %1.0fk %s", d/1000, postfix);
03364 }
03365
03366 static void dump_metadata(void *ctx, AVDictionary *m, const char *indent)
03367 {
03368 if(m && !(m->count == 1 && av_dict_get(m, "language", NULL, 0))){
03369 AVDictionaryEntry *tag=NULL;
03370
03371 av_log(ctx, AV_LOG_INFO, "%sMetadata:\n", indent);
03372 while((tag=av_dict_get(m, "", tag, AV_DICT_IGNORE_SUFFIX))) {
03373 if(strcmp("language", tag->key))
03374 av_log(ctx, AV_LOG_INFO, "%s %-16s: %s\n", indent, tag->key, tag->value);
03375 }
03376 }
03377 }
03378
03379
03380 static void dump_stream_format(AVFormatContext *ic, int i, int index, int is_output)
03381 {
03382 char buf[256];
03383 int flags = (is_output ? ic->oformat->flags : ic->iformat->flags);
03384 AVStream *st = ic->streams[i];
03385 int g = av_gcd(st->time_base.num, st->time_base.den);
03386 AVDictionaryEntry *lang = av_dict_get(st->metadata, "language", NULL, 0);
03387 avcodec_string(buf, sizeof(buf), st->codec, is_output);
03388 av_log(NULL, AV_LOG_INFO, " Stream #%d.%d", index, i);
03389
03390
03391 if (flags & AVFMT_SHOW_IDS)
03392 av_log(NULL, AV_LOG_INFO, "[0x%x]", st->id);
03393 if (lang)
03394 av_log(NULL, AV_LOG_INFO, "(%s)", lang->value);
03395 av_log(NULL, AV_LOG_DEBUG, ", %d, %d/%d", st->codec_info_nb_frames, st->time_base.num/g, st->time_base.den/g);
03396 av_log(NULL, AV_LOG_INFO, ": %s", buf);
03397 if (st->sample_aspect_ratio.num &&
03398 av_cmp_q(st->sample_aspect_ratio, st->codec->sample_aspect_ratio)) {
03399 AVRational display_aspect_ratio;
03400 av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
03401 st->codec->width*st->sample_aspect_ratio.num,
03402 st->codec->height*st->sample_aspect_ratio.den,
03403 1024*1024);
03404 av_log(NULL, AV_LOG_INFO, ", PAR %d:%d DAR %d:%d",
03405 st->sample_aspect_ratio.num, st->sample_aspect_ratio.den,
03406 display_aspect_ratio.num, display_aspect_ratio.den);
03407 }
03408 if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO){
03409 if(st->avg_frame_rate.den && st->avg_frame_rate.num)
03410 print_fps(av_q2d(st->avg_frame_rate), "fps");
03411 if(st->r_frame_rate.den && st->r_frame_rate.num)
03412 print_fps(av_q2d(st->r_frame_rate), "tbr");
03413 if(st->time_base.den && st->time_base.num)
03414 print_fps(1/av_q2d(st->time_base), "tbn");
03415 if(st->codec->time_base.den && st->codec->time_base.num)
03416 print_fps(1/av_q2d(st->codec->time_base), "tbc");
03417 }
03418 if (st->disposition & AV_DISPOSITION_DEFAULT)
03419 av_log(NULL, AV_LOG_INFO, " (default)");
03420 if (st->disposition & AV_DISPOSITION_DUB)
03421 av_log(NULL, AV_LOG_INFO, " (dub)");
03422 if (st->disposition & AV_DISPOSITION_ORIGINAL)
03423 av_log(NULL, AV_LOG_INFO, " (original)");
03424 if (st->disposition & AV_DISPOSITION_COMMENT)
03425 av_log(NULL, AV_LOG_INFO, " (comment)");
03426 if (st->disposition & AV_DISPOSITION_LYRICS)
03427 av_log(NULL, AV_LOG_INFO, " (lyrics)");
03428 if (st->disposition & AV_DISPOSITION_KARAOKE)
03429 av_log(NULL, AV_LOG_INFO, " (karaoke)");
03430 if (st->disposition & AV_DISPOSITION_FORCED)
03431 av_log(NULL, AV_LOG_INFO, " (forced)");
03432 if (st->disposition & AV_DISPOSITION_HEARING_IMPAIRED)
03433 av_log(NULL, AV_LOG_INFO, " (hearing impaired)");
03434 if (st->disposition & AV_DISPOSITION_VISUAL_IMPAIRED)
03435 av_log(NULL, AV_LOG_INFO, " (visual impaired)");
03436 if (st->disposition & AV_DISPOSITION_CLEAN_EFFECTS)
03437 av_log(NULL, AV_LOG_INFO, " (clean effects)");
03438 av_log(NULL, AV_LOG_INFO, "\n");
03439 dump_metadata(NULL, st->metadata, " ");
03440 }
03441
03442 #if FF_API_DUMP_FORMAT
03443 void dump_format(AVFormatContext *ic,
03444 int index,
03445 const char *url,
03446 int is_output)
03447 {
03448 av_dump_format(ic, index, url, is_output);
03449 }
03450 #endif
03451
03452 void av_dump_format(AVFormatContext *ic,
03453 int index,
03454 const char *url,
03455 int is_output)
03456 {
03457 int i;
03458 uint8_t *printed = ic->nb_streams ? av_mallocz(ic->nb_streams) : NULL;
03459 if (ic->nb_streams && !printed)
03460 return;
03461
03462 av_log(NULL, AV_LOG_INFO, "%s #%d, %s, %s '%s':\n",
03463 is_output ? "Output" : "Input",
03464 index,
03465 is_output ? ic->oformat->name : ic->iformat->name,
03466 is_output ? "to" : "from", url);
03467 dump_metadata(NULL, ic->metadata, " ");
03468 if (!is_output) {
03469 av_log(NULL, AV_LOG_INFO, " Duration: ");
03470 if (ic->duration != AV_NOPTS_VALUE) {
03471 int hours, mins, secs, us;
03472 secs = ic->duration / AV_TIME_BASE;
03473 us = ic->duration % AV_TIME_BASE;
03474 mins = secs / 60;
03475 secs %= 60;
03476 hours = mins / 60;
03477 mins %= 60;
03478 av_log(NULL, AV_LOG_INFO, "%02d:%02d:%02d.%02d", hours, mins, secs,
03479 (100 * us) / AV_TIME_BASE);
03480 } else {
03481 av_log(NULL, AV_LOG_INFO, "N/A");
03482 }
03483 if (ic->start_time != AV_NOPTS_VALUE) {
03484 int secs, us;
03485 av_log(NULL, AV_LOG_INFO, ", start: ");
03486 secs = ic->start_time / AV_TIME_BASE;
03487 us = abs(ic->start_time % AV_TIME_BASE);
03488 av_log(NULL, AV_LOG_INFO, "%d.%06d",
03489 secs, (int)av_rescale(us, 1000000, AV_TIME_BASE));
03490 }
03491 av_log(NULL, AV_LOG_INFO, ", bitrate: ");
03492 if (ic->bit_rate) {
03493 av_log(NULL, AV_LOG_INFO,"%d kb/s", ic->bit_rate / 1000);
03494 } else {
03495 av_log(NULL, AV_LOG_INFO, "N/A");
03496 }
03497 av_log(NULL, AV_LOG_INFO, "\n");
03498 }
03499 for (i = 0; i < ic->nb_chapters; i++) {
03500 AVChapter *ch = ic->chapters[i];
03501 av_log(NULL, AV_LOG_INFO, " Chapter #%d.%d: ", index, i);
03502 av_log(NULL, AV_LOG_INFO, "start %f, ", ch->start * av_q2d(ch->time_base));
03503 av_log(NULL, AV_LOG_INFO, "end %f\n", ch->end * av_q2d(ch->time_base));
03504
03505 dump_metadata(NULL, ch->metadata, " ");
03506 }
03507 if(ic->nb_programs) {
03508 int j, k, total = 0;
03509 for(j=0; j<ic->nb_programs; j++) {
03510 AVDictionaryEntry *name = av_dict_get(ic->programs[j]->metadata,
03511 "name", NULL, 0);
03512 av_log(NULL, AV_LOG_INFO, " Program %d %s\n", ic->programs[j]->id,
03513 name ? name->value : "");
03514 dump_metadata(NULL, ic->programs[j]->metadata, " ");
03515 for(k=0; k<ic->programs[j]->nb_stream_indexes; k++) {
03516 dump_stream_format(ic, ic->programs[j]->stream_index[k], index, is_output);
03517 printed[ic->programs[j]->stream_index[k]] = 1;
03518 }
03519 total += ic->programs[j]->nb_stream_indexes;
03520 }
03521 if (total < ic->nb_streams)
03522 av_log(NULL, AV_LOG_INFO, " No Program\n");
03523 }
03524 for(i=0;i<ic->nb_streams;i++)
03525 if (!printed[i])
03526 dump_stream_format(ic, i, index, is_output);
03527
03528 av_free(printed);
03529 }
03530
03531 int64_t av_gettime(void)
03532 {
03533 struct timeval tv;
03534 gettimeofday(&tv,NULL);
03535 return (int64_t)tv.tv_sec * 1000000 + tv.tv_usec;
03536 }
03537
03538 uint64_t ff_ntp_time(void)
03539 {
03540 return (av_gettime() / 1000) * 1000 + NTP_OFFSET_US;
03541 }
03542
03543 #if FF_API_PARSE_DATE
03544 #include "libavutil/parseutils.h"
03545
03546 int64_t parse_date(const char *timestr, int duration)
03547 {
03548 int64_t timeval;
03549 av_parse_time(&timeval, timestr, duration);
03550 return timeval;
03551 }
03552 #endif
03553
03554 #if FF_API_FIND_INFO_TAG
03555 #include "libavutil/parseutils.h"
03556
03557 int find_info_tag(char *arg, int arg_size, const char *tag1, const char *info)
03558 {
03559 return av_find_info_tag(arg, arg_size, tag1, info);
03560 }
03561 #endif
03562
03563 int av_get_frame_filename(char *buf, int buf_size,
03564 const char *path, int number)
03565 {
03566 const char *p;
03567 char *q, buf1[20], c;
03568 int nd, len, percentd_found;
03569
03570 q = buf;
03571 p = path;
03572 percentd_found = 0;
03573 for(;;) {
03574 c = *p++;
03575 if (c == '\0')
03576 break;
03577 if (c == '%') {
03578 do {
03579 nd = 0;
03580 while (isdigit(*p)) {
03581 nd = nd * 10 + *p++ - '0';
03582 }
03583 c = *p++;
03584 } while (isdigit(c));
03585
03586 switch(c) {
03587 case '%':
03588 goto addchar;
03589 case 'd':
03590 if (percentd_found)
03591 goto fail;
03592 percentd_found = 1;
03593 snprintf(buf1, sizeof(buf1), "%0*d", nd, number);
03594 len = strlen(buf1);
03595 if ((q - buf + len) > buf_size - 1)
03596 goto fail;
03597 memcpy(q, buf1, len);
03598 q += len;
03599 break;
03600 default:
03601 goto fail;
03602 }
03603 } else {
03604 addchar:
03605 if ((q - buf) < buf_size - 1)
03606 *q++ = c;
03607 }
03608 }
03609 if (!percentd_found)
03610 goto fail;
03611 *q = '\0';
03612 return 0;
03613 fail:
03614 *q = '\0';
03615 return -1;
03616 }
03617
03618 static void hex_dump_internal(void *avcl, FILE *f, int level, uint8_t *buf, int size)
03619 {
03620 int len, i, j, c;
03621 #undef fprintf
03622 #define PRINT(...) do { if (!f) av_log(avcl, level, __VA_ARGS__); else fprintf(f, __VA_ARGS__); } while(0)
03623
03624 for(i=0;i<size;i+=16) {
03625 len = size - i;
03626 if (len > 16)
03627 len = 16;
03628 PRINT("%08x ", i);
03629 for(j=0;j<16;j++) {
03630 if (j < len)
03631 PRINT(" %02x", buf[i+j]);
03632 else
03633 PRINT(" ");
03634 }
03635 PRINT(" ");
03636 for(j=0;j<len;j++) {
03637 c = buf[i+j];
03638 if (c < ' ' || c > '~')
03639 c = '.';
03640 PRINT("%c", c);
03641 }
03642 PRINT("\n");
03643 }
03644 #undef PRINT
03645 }
03646
03647 void av_hex_dump(FILE *f, uint8_t *buf, int size)
03648 {
03649 hex_dump_internal(NULL, f, 0, buf, size);
03650 }
03651
03652 void av_hex_dump_log(void *avcl, int level, uint8_t *buf, int size)
03653 {
03654 hex_dump_internal(avcl, NULL, level, buf, size);
03655 }
03656
03657 static void pkt_dump_internal(void *avcl, FILE *f, int level, AVPacket *pkt, int dump_payload, AVRational time_base)
03658 {
03659 #undef fprintf
03660 #define PRINT(...) do { if (!f) av_log(avcl, level, __VA_ARGS__); else fprintf(f, __VA_ARGS__); } while(0)
03661 PRINT("stream #%d:\n", pkt->stream_index);
03662 PRINT(" keyframe=%d\n", ((pkt->flags & AV_PKT_FLAG_KEY) != 0));
03663 PRINT(" duration=%0.3f\n", pkt->duration * av_q2d(time_base));
03664
03665 PRINT(" dts=");
03666 if (pkt->dts == AV_NOPTS_VALUE)
03667 PRINT("N/A");
03668 else
03669 PRINT("%0.3f", pkt->dts * av_q2d(time_base));
03670
03671 PRINT(" pts=");
03672 if (pkt->pts == AV_NOPTS_VALUE)
03673 PRINT("N/A");
03674 else
03675 PRINT("%0.3f", pkt->pts * av_q2d(time_base));
03676 PRINT("\n");
03677 PRINT(" size=%d\n", pkt->size);
03678 #undef PRINT
03679 if (dump_payload)
03680 av_hex_dump(f, pkt->data, pkt->size);
03681 }
03682
03683 #if FF_API_PKT_DUMP
03684 void av_pkt_dump(FILE *f, AVPacket *pkt, int dump_payload)
03685 {
03686 AVRational tb = { 1, AV_TIME_BASE };
03687 pkt_dump_internal(NULL, f, 0, pkt, dump_payload, tb);
03688 }
03689 #endif
03690
03691 void av_pkt_dump2(FILE *f, AVPacket *pkt, int dump_payload, AVStream *st)
03692 {
03693 pkt_dump_internal(NULL, f, 0, pkt, dump_payload, st->time_base);
03694 }
03695
03696 #if FF_API_PKT_DUMP
03697 void av_pkt_dump_log(void *avcl, int level, AVPacket *pkt, int dump_payload)
03698 {
03699 AVRational tb = { 1, AV_TIME_BASE };
03700 pkt_dump_internal(avcl, NULL, level, pkt, dump_payload, tb);
03701 }
03702 #endif
03703
03704 void av_pkt_dump_log2(void *avcl, int level, AVPacket *pkt, int dump_payload,
03705 AVStream *st)
03706 {
03707 pkt_dump_internal(avcl, NULL, level, pkt, dump_payload, st->time_base);
03708 }
03709
03710 void av_url_split(char *proto, int proto_size,
03711 char *authorization, int authorization_size,
03712 char *hostname, int hostname_size,
03713 int *port_ptr,
03714 char *path, int path_size,
03715 const char *url)
03716 {
03717 const char *p, *ls, *at, *col, *brk;
03718
03719 if (port_ptr) *port_ptr = -1;
03720 if (proto_size > 0) proto[0] = 0;
03721 if (authorization_size > 0) authorization[0] = 0;
03722 if (hostname_size > 0) hostname[0] = 0;
03723 if (path_size > 0) path[0] = 0;
03724
03725
03726 if ((p = strchr(url, ':'))) {
03727 av_strlcpy(proto, url, FFMIN(proto_size, p + 1 - url));
03728 p++;
03729 if (*p == '/') p++;
03730 if (*p == '/') p++;
03731 } else {
03732
03733 av_strlcpy(path, url, path_size);
03734 return;
03735 }
03736
03737
03738 ls = strchr(p, '/');
03739 if(!ls)
03740 ls = strchr(p, '?');
03741 if(ls)
03742 av_strlcpy(path, ls, path_size);
03743 else
03744 ls = &p[strlen(p)];
03745
03746
03747 if (ls != p) {
03748
03749 if ((at = strchr(p, '@')) && at < ls) {
03750 av_strlcpy(authorization, p,
03751 FFMIN(authorization_size, at + 1 - p));
03752 p = at + 1;
03753 }
03754
03755 if (*p == '[' && (brk = strchr(p, ']')) && brk < ls) {
03756
03757 av_strlcpy(hostname, p + 1,
03758 FFMIN(hostname_size, brk - p));
03759 if (brk[1] == ':' && port_ptr)
03760 *port_ptr = atoi(brk + 2);
03761 } else if ((col = strchr(p, ':')) && col < ls) {
03762 av_strlcpy(hostname, p,
03763 FFMIN(col + 1 - p, hostname_size));
03764 if (port_ptr) *port_ptr = atoi(col + 1);
03765 } else
03766 av_strlcpy(hostname, p,
03767 FFMIN(ls + 1 - p, hostname_size));
03768 }
03769 }
03770
03771 char *ff_data_to_hex(char *buff, const uint8_t *src, int s, int lowercase)
03772 {
03773 int i;
03774 static const char hex_table_uc[16] = { '0', '1', '2', '3',
03775 '4', '5', '6', '7',
03776 '8', '9', 'A', 'B',
03777 'C', 'D', 'E', 'F' };
03778 static const char hex_table_lc[16] = { '0', '1', '2', '3',
03779 '4', '5', '6', '7',
03780 '8', '9', 'a', 'b',
03781 'c', 'd', 'e', 'f' };
03782 const char *hex_table = lowercase ? hex_table_lc : hex_table_uc;
03783
03784 for(i = 0; i < s; i++) {
03785 buff[i * 2] = hex_table[src[i] >> 4];
03786 buff[i * 2 + 1] = hex_table[src[i] & 0xF];
03787 }
03788
03789 return buff;
03790 }
03791
03792 int ff_hex_to_data(uint8_t *data, const char *p)
03793 {
03794 int c, len, v;
03795
03796 len = 0;
03797 v = 1;
03798 for (;;) {
03799 p += strspn(p, SPACE_CHARS);
03800 if (*p == '\0')
03801 break;
03802 c = toupper((unsigned char) *p++);
03803 if (c >= '0' && c <= '9')
03804 c = c - '0';
03805 else if (c >= 'A' && c <= 'F')
03806 c = c - 'A' + 10;
03807 else
03808 break;
03809 v = (v << 4) | c;
03810 if (v & 0x100) {
03811 if (data)
03812 data[len] = v;
03813 len++;
03814 v = 1;
03815 }
03816 }
03817 return len;
03818 }
03819
03820 #if FF_API_SET_PTS_INFO
03821 void av_set_pts_info(AVStream *s, int pts_wrap_bits,
03822 unsigned int pts_num, unsigned int pts_den)
03823 {
03824 avpriv_set_pts_info(s, pts_wrap_bits, pts_num, pts_den);
03825 }
03826 #endif
03827
03828 void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits,
03829 unsigned int pts_num, unsigned int pts_den)
03830 {
03831 AVRational new_tb;
03832 if(av_reduce(&new_tb.num, &new_tb.den, pts_num, pts_den, INT_MAX)){
03833 if(new_tb.num != pts_num)
03834 av_log(NULL, AV_LOG_DEBUG, "st:%d removing common factor %d from timebase\n", s->index, pts_num/new_tb.num);
03835 }else
03836 av_log(NULL, AV_LOG_WARNING, "st:%d has too large timebase, reducing\n", s->index);
03837
03838 if(new_tb.num <= 0 || new_tb.den <= 0) {
03839 av_log(NULL, AV_LOG_ERROR, "Ignoring attempt to set invalid timebase for st:%d\n", s->index);
03840 return;
03841 }
03842 s->time_base = new_tb;
03843 s->pts_wrap_bits = pts_wrap_bits;
03844 }
03845
03846 int ff_url_join(char *str, int size, const char *proto,
03847 const char *authorization, const char *hostname,
03848 int port, const char *fmt, ...)
03849 {
03850 #if CONFIG_NETWORK
03851 struct addrinfo hints, *ai;
03852 #endif
03853
03854 str[0] = '\0';
03855 if (proto)
03856 av_strlcatf(str, size, "%s://", proto);
03857 if (authorization && authorization[0])
03858 av_strlcatf(str, size, "%s@", authorization);
03859 #if CONFIG_NETWORK && defined(AF_INET6)
03860
03861
03862 memset(&hints, 0, sizeof(hints));
03863 hints.ai_flags = AI_NUMERICHOST;
03864 if (!getaddrinfo(hostname, NULL, &hints, &ai)) {
03865 if (ai->ai_family == AF_INET6) {
03866 av_strlcat(str, "[", size);
03867 av_strlcat(str, hostname, size);
03868 av_strlcat(str, "]", size);
03869 } else {
03870 av_strlcat(str, hostname, size);
03871 }
03872 freeaddrinfo(ai);
03873 } else
03874 #endif
03875
03876 av_strlcat(str, hostname, size);
03877
03878 if (port >= 0)
03879 av_strlcatf(str, size, ":%d", port);
03880 if (fmt) {
03881 va_list vl;
03882 int len = strlen(str);
03883
03884 va_start(vl, fmt);
03885 vsnprintf(str + len, size > len ? size - len : 0, fmt, vl);
03886 va_end(vl);
03887 }
03888 return strlen(str);
03889 }
03890
03891 int ff_write_chained(AVFormatContext *dst, int dst_stream, AVPacket *pkt,
03892 AVFormatContext *src)
03893 {
03894 AVPacket local_pkt;
03895
03896 local_pkt = *pkt;
03897 local_pkt.stream_index = dst_stream;
03898 if (pkt->pts != AV_NOPTS_VALUE)
03899 local_pkt.pts = av_rescale_q(pkt->pts,
03900 src->streams[pkt->stream_index]->time_base,
03901 dst->streams[dst_stream]->time_base);
03902 if (pkt->dts != AV_NOPTS_VALUE)
03903 local_pkt.dts = av_rescale_q(pkt->dts,
03904 src->streams[pkt->stream_index]->time_base,
03905 dst->streams[dst_stream]->time_base);
03906 return av_write_frame(dst, &local_pkt);
03907 }
03908
03909 void ff_parse_key_value(const char *str, ff_parse_key_val_cb callback_get_buf,
03910 void *context)
03911 {
03912 const char *ptr = str;
03913
03914
03915 for (;;) {
03916 const char *key;
03917 char *dest = NULL, *dest_end;
03918 int key_len, dest_len = 0;
03919
03920
03921 while (*ptr && (isspace(*ptr) || *ptr == ','))
03922 ptr++;
03923 if (!*ptr)
03924 break;
03925
03926 key = ptr;
03927
03928 if (!(ptr = strchr(key, '=')))
03929 break;
03930 ptr++;
03931 key_len = ptr - key;
03932
03933 callback_get_buf(context, key, key_len, &dest, &dest_len);
03934 dest_end = dest + dest_len - 1;
03935
03936 if (*ptr == '\"') {
03937 ptr++;
03938 while (*ptr && *ptr != '\"') {
03939 if (*ptr == '\\') {
03940 if (!ptr[1])
03941 break;
03942 if (dest && dest < dest_end)
03943 *dest++ = ptr[1];
03944 ptr += 2;
03945 } else {
03946 if (dest && dest < dest_end)
03947 *dest++ = *ptr;
03948 ptr++;
03949 }
03950 }
03951 if (*ptr == '\"')
03952 ptr++;
03953 } else {
03954 for (; *ptr && !(isspace(*ptr) || *ptr == ','); ptr++)
03955 if (dest && dest < dest_end)
03956 *dest++ = *ptr;
03957 }
03958 if (dest)
03959 *dest = 0;
03960 }
03961 }
03962
03963 int ff_find_stream_index(AVFormatContext *s, int id)
03964 {
03965 int i;
03966 for (i = 0; i < s->nb_streams; i++) {
03967 if (s->streams[i]->id == id)
03968 return i;
03969 }
03970 return -1;
03971 }
03972
03973 void ff_make_absolute_url(char *buf, int size, const char *base,
03974 const char *rel)
03975 {
03976 char *sep;
03977
03978 if (base && strstr(base, "://") && rel[0] == '/') {
03979 if (base != buf)
03980 av_strlcpy(buf, base, size);
03981 sep = strstr(buf, "://");
03982 if (sep) {
03983 sep += 3;
03984 sep = strchr(sep, '/');
03985 if (sep)
03986 *sep = '\0';
03987 }
03988 av_strlcat(buf, rel, size);
03989 return;
03990 }
03991
03992 if (!base || strstr(rel, "://") || rel[0] == '/') {
03993 av_strlcpy(buf, rel, size);
03994 return;
03995 }
03996 if (base != buf)
03997 av_strlcpy(buf, base, size);
03998
03999 sep = strrchr(buf, '/');
04000 if (sep)
04001 sep[1] = '\0';
04002 else
04003 buf[0] = '\0';
04004 while (av_strstart(rel, "../", NULL) && sep) {
04005
04006 sep[0] = '\0';
04007 sep = strrchr(buf, '/');
04008
04009 if (!strcmp(sep ? &sep[1] : buf, "..")) {
04010
04011 av_strlcat(buf, "/", size);
04012 break;
04013 }
04014
04015 if (sep)
04016 sep[1] = '\0';
04017 else
04018 buf[0] = '\0';
04019 rel += 3;
04020 }
04021 av_strlcat(buf, rel, size);
04022 }
04023
04024 int64_t ff_iso8601_to_unix_time(const char *datestr)
04025 {
04026 #if HAVE_STRPTIME
04027 struct tm time1 = {0}, time2 = {0};
04028 char *ret1, *ret2;
04029 ret1 = strptime(datestr, "%Y - %m - %d %T", &time1);
04030 ret2 = strptime(datestr, "%Y - %m - %dT%T", &time2);
04031 if (ret2 && !ret1)
04032 return av_timegm(&time2);
04033 else
04034 return av_timegm(&time1);
04035 #else
04036 av_log(NULL, AV_LOG_WARNING, "strptime() unavailable on this system, cannot convert "
04037 "the date string.\n");
04038 return 0;
04039 #endif
04040 }
04041
04042 int avformat_query_codec(AVOutputFormat *ofmt, enum CodecID codec_id, int std_compliance)
04043 {
04044 if (ofmt) {
04045 if (ofmt->query_codec)
04046 return ofmt->query_codec(codec_id, std_compliance);
04047 else if (ofmt->codec_tag)
04048 return !!av_codec_get_tag(ofmt->codec_tag, codec_id);
04049 else if (codec_id == ofmt->video_codec || codec_id == ofmt->audio_codec ||
04050 codec_id == ofmt->subtitle_codec)
04051 return 1;
04052 }
04053 return AVERROR_PATCHWELCOME;
04054 }
04055
04056 int avformat_network_init(void)
04057 {
04058 #if CONFIG_NETWORK
04059 int ret;
04060 ff_network_inited_globally = 1;
04061 if ((ret = ff_network_init()) < 0)
04062 return ret;
04063 ff_tls_init();
04064 #endif
04065 return 0;
04066 }
04067
04068 int avformat_network_deinit(void)
04069 {
04070 #if CONFIG_NETWORK
04071 ff_network_close();
04072 ff_tls_deinit();
04073 #endif
04074 return 0;
04075 }
04076
04077 int ff_add_param_change(AVPacket *pkt, int32_t channels,
04078 uint64_t channel_layout, int32_t sample_rate,
04079 int32_t width, int32_t height)
04080 {
04081 uint32_t flags = 0;
04082 int size = 4;
04083 uint8_t *data;
04084 if (!pkt)
04085 return AVERROR(EINVAL);
04086 if (channels) {
04087 size += 4;
04088 flags |= AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT;
04089 }
04090 if (channel_layout) {
04091 size += 8;
04092 flags |= AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_LAYOUT;
04093 }
04094 if (sample_rate) {
04095 size += 4;
04096 flags |= AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE;
04097 }
04098 if (width || height) {
04099 size += 8;
04100 flags |= AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS;
04101 }
04102 data = av_packet_new_side_data(pkt, AV_PKT_DATA_PARAM_CHANGE, size);
04103 if (!data)
04104 return AVERROR(ENOMEM);
04105 bytestream_put_le32(&data, flags);
04106 if (channels)
04107 bytestream_put_le32(&data, channels);
04108 if (channel_layout)
04109 bytestream_put_le64(&data, channel_layout);
04110 if (sample_rate)
04111 bytestream_put_le32(&data, sample_rate);
04112 if (width || height) {
04113 bytestream_put_le32(&data, width);
04114 bytestream_put_le32(&data, height);
04115 }
04116 return 0;
04117 }
04118
04119 const struct AVCodecTag *avformat_get_riff_video_tags(void)
04120 {
04121 return ff_codec_bmp_tags;
04122 }
04123 const struct AVCodecTag *avformat_get_riff_audio_tags(void)
04124 {
04125 return ff_codec_wav_tags;
04126 }