tools/ismindex.c

   1 /*
   2  * Copyright (c) 2012 Martin Storsjo
   3  *
   4  * This file is part of FFmpeg.
   5  *
   6  * FFmpeg is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * FFmpeg is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with FFmpeg; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  19  */
  20
  21 /*
  22  * To create a simple file for smooth streaming:
  23  * ffmpeg <normal input/transcoding options> -movflags frag_keyframe foo.ismv
  24  * ismindex -n foo foo.ismv
  25  * This step creates foo.ism and foo.ismc that is required by IIS for
  26  * serving it.
  27  *
  28  * With -ismf, it also creates foo.ismf, which maps fragment names to
  29  * start-end offsets in the ismv, for use in your own streaming server.
  30  *
  31  * By adding -path-prefix path/, the produced foo.ism will refer to the
  32  * files foo.ismv as "path/foo.ismv" - the prefix for the generated ismc
  33  * file can be set with the -ismc-prefix option similarly.
  34  *
  35  * To pre-split files for serving as static files by a web server without
  36  * any extra server support, create the ismv file as above, and split it:
  37  * ismindex -split foo.ismv
  38  * This step creates a file Manifest and directories QualityLevel(...),
  39  * that can be read directly by a smooth streaming player.
  40  *
  41  * The -output dir option can be used to request that output files
  42  * (both .ism/.ismc, or Manifest/QualityLevels* when splitting)
  43  * should be written to this directory instead of in the current directory.
  44  * (The directory itself isn't created if it doesn't already exist.)
  45  */
  46
  47 #include <stdio.h>
  48 #include <string.h>
  49
  50 #include "cmdutils.h"
  51
  52 #include "libavformat/avformat.h"
  53 #include "libavformat/isom.h"
  54 #include "libavformat/os_support.h"
  55 #include "libavutil/intreadwrite.h"
  56 #include "libavutil/mathematics.h"
  57
  58 static int usage(const char *argv0, int ret)
  59 {
  60     fprintf(stderr, "%s [-split] [-ismf] [-n basename] [-path-prefix prefix] "
  61                     "[-ismc-prefix prefix] [-output dir] file1 [file2] ...\n", argv0);
  62     return ret;
  63 }
  64
  65 struct MoofOffset {
  66     int64_t time;
  67     int64_t offset;
  68     int64_t duration;
  69 };
  70
  71 struct Track {
  72     const char *name;
  73     int64_t duration;
  74     int bitrate;
  75     int track_id;
  76     int is_audio, is_video;
  77     int width, height;
  78     int chunks;
  79     int sample_rate, channels;
  80     uint8_t *codec_private;
  81     int codec_private_size;
  82     struct MoofOffset *offsets;
  83     int timescale;
  84     const char *fourcc;
  85     int blocksize;
  86     int tag;
  87 };
  88
  89 struct Tracks {
  90     int nb_tracks;
  91     int64_t duration;
  92     struct Track **tracks;
  93     int video_track, audio_track;
  94     int nb_video_tracks, nb_audio_tracks;
  95 };
  96
  97 static int expect_tag(int32_t got_tag, int32_t expected_tag) {
  98     if (got_tag != expected_tag) {
  99         char got_tag_str[4], expected_tag_str[4];
 100         AV_WB32(got_tag_str, got_tag);
 101         AV_WB32(expected_tag_str, expected_tag);
 102         fprintf(stderr, "wanted tag %.4s, got %.4s\n", expected_tag_str,
 103                 got_tag_str);
 104         return -1;
 105     }
 106     return 0;
 107 }
 108
 109 static int copy_tag(AVIOContext *in, AVIOContext *out, int32_t tag_name)
 110 {
 111     int32_t size, tag;
 112
 113     size = avio_rb32(in);
 114     tag  = avio_rb32(in);
 115     avio_wb32(out, size);
 116     avio_wb32(out, tag);
 117     if (expect_tag(tag, tag_name) != 0)
 118         return -1;
 119     size -= 8;
 120     while (size > 0) {
 121         char buf[1024];
 122         int len = FFMIN(sizeof(buf), size);
 123         int got;
 124         if ((got = avio_read(in, buf, len)) != len) {
 125             fprintf(stderr, "short read, wanted %d, got %d\n", len, got);
 126             break;
 127         }
 128         avio_write(out, buf, len);
 129         size -= len;
 130     }
 131     return 0;
 132 }
 133
 134 static int skip_tag(AVIOContext *in, int32_t tag_name)
 135 {
 136     int64_t pos = avio_tell(in);
 137     int32_t size, tag;
 138
 139     size = avio_rb32(in);
 140     tag  = avio_rb32(in);
 141     if (expect_tag(tag, tag_name) != 0)
 142         return -1;
 143     avio_seek(in, pos + size, SEEK_SET);
 144     return 0;
 145 }
 146
 147 static int write_fragment(const char *filename, AVIOContext *in)
 148 {
 149     AVIOContext *out = NULL;
 150     int ret;
 151
 152     if ((ret = avio_open2(&out, filename, AVIO_FLAG_WRITE, NULL, NULL)) < 0) {
 153         char errbuf[100];
 154         av_strerror(ret, errbuf, sizeof(errbuf));
 155         fprintf(stderr, "Unable to open %s: %s\n", filename, errbuf);
 156         return ret;
 157     }
 158     ret = copy_tag(in, out, MKBETAG('m', 'o', 'o', 'f'));
 159     if (!ret)
 160         ret = copy_tag(in, out, MKBETAG('m', 'd', 'a', 't'));
 161
 162     avio_flush(out);
 163     avio_close(out);
 164
 165     return ret;
 166 }
 167
 168 static int skip_fragment(AVIOContext *in)
 169 {
 170     int ret;
 171     ret = skip_tag(in, MKBETAG('m', 'o', 'o', 'f'));
 172     if (!ret)
 173         ret = skip_tag(in, MKBETAG('m', 'd', 'a', 't'));
 174     return ret;
 175 }
 176
 177 static int write_fragments(struct Tracks *tracks, int start_index,
 178                            AVIOContext *in, const char *basename,
 179                            int split, int ismf, const char* output_prefix)
 180 {
 181     char dirname[2048], filename[2048], idxname[2048];
 182     int i, j, ret = 0, fragment_ret;
 183     FILE* out = NULL;
 184
 185     if (ismf) {
 186         snprintf(idxname, sizeof(idxname), "%s%s.ismf", output_prefix, basename);
 187         out = fopen(idxname, "w");
 188         if (!out) {
 189             ret = AVERROR(errno);
 190             perror(idxname);
 191             goto fail;
 192         }
 193     }
 194     for (i = start_index; i < tracks->nb_tracks; i++) {
 195         struct Track *track = tracks->tracks[i];
 196         const char *type    = track->is_video ? "video" : "audio";
 197         snprintf(dirname, sizeof(dirname), "%sQualityLevels(%d)", output_prefix, track->bitrate);
 198         if (split) {
 199             if (mkdir(dirname, 0777) == -1 && errno != EEXIST) {
 200                 ret = AVERROR(errno);
 201                 perror(dirname);
 202                 goto fail;
 203             }
 204         }
 205         for (j = 0; j < track->chunks; j++) {
 206             snprintf(filename, sizeof(filename), "%s/Fragments(%s=%"PRId64")",
 207                      dirname, type, track->offsets[j].time);
 208             avio_seek(in, track->offsets[j].offset, SEEK_SET);
 209             if (ismf)
 210                 fprintf(out, "%s %"PRId64, filename, avio_tell(in));
 211             if (split)
 212                 fragment_ret = write_fragment(filename, in);
 213             else
 214                 fragment_ret = skip_fragment(in);
 215             if (ismf)
 216                 fprintf(out, " %"PRId64"\n", avio_tell(in));
 217             if (fragment_ret != 0) {
 218                 fprintf(stderr, "failed fragment %d in track %d (%s)\n", j,
 219                         track->track_id, track->name);
 220                 ret = fragment_ret;
 221             }
 222         }
 223     }
 224 fail:
 225     if (out)
 226         fclose(out);
 227     return ret;
 228 }
 229
 230 static int64_t read_trun_duration(AVIOContext *in, int default_duration,
 231                                   int64_t end)
 232 {
 233     int64_t dts = 0;
 234     int64_t pos;
 235     int flags, i;
 236     int entries;
 237     int64_t first_pts = 0;
 238     int64_t max_pts = 0;
 239     avio_r8(in); /* version */
 240     flags = avio_rb24(in);
 241     if (default_duration <= 0 && !(flags & MOV_TRUN_SAMPLE_DURATION)) {
 242         fprintf(stderr, "No sample duration in trun flags\n");
 243         return -1;
 244     }
 245     entries = avio_rb32(in);
 246
 247     if (flags & MOV_TRUN_DATA_OFFSET)        avio_rb32(in);
 248     if (flags & MOV_TRUN_FIRST_SAMPLE_FLAGS) avio_rb32(in);
 249
 250     pos = avio_tell(in);
 251     for (i = 0; i < entries && pos < end; i++) {
 252         int sample_duration = default_duration;
 253         int64_t pts = dts;
 254         if (flags & MOV_TRUN_SAMPLE_DURATION) sample_duration = avio_rb32(in);
 255         if (flags & MOV_TRUN_SAMPLE_SIZE)     avio_rb32(in);
 256         if (flags & MOV_TRUN_SAMPLE_FLAGS)    avio_rb32(in);
 257         if (flags & MOV_TRUN_SAMPLE_CTS)      pts += avio_rb32(in);
 258         if (sample_duration < 0) {
 259             fprintf(stderr, "Negative sample duration %d\n", sample_duration);
 260             return -1;
 261         }
 262         if (i == 0)
 263             first_pts = pts;
 264         max_pts = FFMAX(max_pts, pts + sample_duration);
 265         dts += sample_duration;
 266         pos = avio_tell(in);
 267     }
 268
 269     return max_pts - first_pts;
 270 }
 271
 272 static int64_t read_moof_duration(AVIOContext *in, int64_t offset)
 273 {
 274     int64_t ret = -1;
 275     int32_t moof_size, size, tag;
 276     int64_t pos = 0;
 277     int default_duration = 0;
 278
 279     avio_seek(in, offset, SEEK_SET);
 280     moof_size = avio_rb32(in);
 281     tag  = avio_rb32(in);
 282     if (expect_tag(tag, MKBETAG('m', 'o', 'o', 'f')) != 0)
 283         goto fail;
 284     while (pos < offset + moof_size) {
 285         pos = avio_tell(in);
 286         size = avio_rb32(in);
 287         tag  = avio_rb32(in);
 288         if (tag == MKBETAG('t', 'r', 'a', 'f')) {
 289             int64_t traf_pos = pos;
 290             int64_t traf_size = size;
 291             while (pos < traf_pos + traf_size) {
 292                 pos = avio_tell(in);
 293                 size = avio_rb32(in);
 294                 tag  = avio_rb32(in);
 295                 if (tag == MKBETAG('t', 'f', 'h', 'd')) {
 296                     int flags = 0;
 297                     avio_r8(in); /* version */
 298                     flags = avio_rb24(in);
 299                     avio_rb32(in); /* track_id */
 300                     if (flags & MOV_TFHD_BASE_DATA_OFFSET)
 301                         avio_rb64(in);
 302                     if (flags & MOV_TFHD_STSD_ID)
 303                         avio_rb32(in);
 304                     if (flags & MOV_TFHD_DEFAULT_DURATION)
 305                         default_duration = avio_rb32(in);
 306                 }
 307                 if (tag == MKBETAG('t', 'r', 'u', 'n')) {
 308                     return read_trun_duration(in, default_duration,
 309                                               pos + size);
 310                 }
 311                 avio_seek(in, pos + size, SEEK_SET);
 312             }
 313             fprintf(stderr, "Couldn't find trun\n");
 314             goto fail;
 315         }
 316         avio_seek(in, pos + size, SEEK_SET);
 317     }
 318     fprintf(stderr, "Couldn't find traf\n");
 319
 320 fail:
 321     return ret;
 322 }
 323
 324 static int read_tfra(struct Tracks *tracks, int start_index, AVIOContext *f)
 325 {
 326     int ret = AVERROR_EOF, track_id;
 327     int version, fieldlength, i, j;
 328     int64_t pos   = avio_tell(f);
 329     uint32_t size = avio_rb32(f);
 330     struct Track *track = NULL;
 331
 332     if (avio_rb32(f) != MKBETAG('t', 'f', 'r', 'a'))
 333         goto fail;
 334     version = avio_r8(f);
 335     avio_rb24(f);
 336     track_id = avio_rb32(f); /* track id */
 337     for (i = start_index; i < tracks->nb_tracks && !track; i++)
 338         if (tracks->tracks[i]->track_id == track_id)
 339             track = tracks->tracks[i];
 340     if (!track) {
 341         /* Ok, continue parsing the next atom */
 342         ret = 0;
 343         goto fail;
 344     }
 345     fieldlength = avio_rb32(f);
 346     track->chunks  = avio_rb32(f);
 347     track->offsets = av_mallocz_array(track->chunks, sizeof(*track->offsets));
 348     if (!track->offsets) {
 349         track->chunks = 0;
 350         ret = AVERROR(ENOMEM);
 351         goto fail;
 352     }
 353     // The duration here is always the difference between consecutive
 354     // start times.
 355     for (i = 0; i < track->chunks; i++) {
 356         if (version == 1) {
 357             track->offsets[i].time   = avio_rb64(f);
 358             track->offsets[i].offset = avio_rb64(f);
 359         } else {
 360             track->offsets[i].time   = avio_rb32(f);
 361             track->offsets[i].offset = avio_rb32(f);
 362         }
 363         for (j = 0; j < ((fieldlength >> 4) & 3) + 1; j++)
 364             avio_r8(f);
 365         for (j = 0; j < ((fieldlength >> 2) & 3) + 1; j++)
 366             avio_r8(f);
 367         for (j = 0; j < ((fieldlength >> 0) & 3) + 1; j++)
 368             avio_r8(f);
 369         if (i > 0)
 370             track->offsets[i - 1].duration = track->offsets[i].time -
 371                                              track->offsets[i - 1].time;
 372     }
 373     if (track->chunks > 0) {
 374         track->offsets[track->chunks - 1].duration = track->offsets[0].time +
 375                                                      track->duration -
 376                                                      track->offsets[track->chunks - 1].time;
 377     }
 378     // Now try to read the actual durations from the trun sample data.
 379     for (i = 0; i < track->chunks; i++) {
 380         int64_t duration = read_moof_duration(f, track->offsets[i].offset);
 381         if (duration > 0 && llabs(duration - track->offsets[i].duration) > 3) {
 382             // 3 allows for integer duration to drift a few units,
 383             // e.g., for 1/3 durations
 384             track->offsets[i].duration = duration;
 385         }
 386     }
 387     if (track->chunks > 0) {
 388         if (track->offsets[track->chunks - 1].duration <= 0) {
 389             fprintf(stderr, "Calculated last chunk duration for track %d "
 390                     "was non-positive (%"PRId64"), probably due to missing "
 391                     "fragments ", track->track_id,
 392                     track->offsets[track->chunks - 1].duration);
 393             if (track->chunks > 1) {
 394                 track->offsets[track->chunks - 1].duration =
 395                     track->offsets[track->chunks - 2].duration;
 396             } else {
 397                 track->offsets[track->chunks - 1].duration = 1;
 398             }
 399             fprintf(stderr, "corrected to %"PRId64"\n",
 400                     track->offsets[track->chunks - 1].duration);
 401             track->duration = track->offsets[track->chunks - 1].time +
 402                               track->offsets[track->chunks - 1].duration -
 403                               track->offsets[0].time;
 404             fprintf(stderr, "Track duration corrected to %"PRId64"\n",
 405                     track->duration);
 406         }
 407     }
 408     ret = 0;
 409
 410 fail:
 411     avio_seek(f, pos + size, SEEK_SET);
 412     return ret;
 413 }
 414
 415 static int read_mfra(struct Tracks *tracks, int start_index,
 416                      const char *file, int split, int ismf,
 417                      const char *basename, const char* output_prefix)
 418 {
 419     int err = 0;
 420     const char* err_str = "";
 421     AVIOContext *f = NULL;
 422     int32_t mfra_size;
 423
 424     if ((err = avio_open2(&f, file, AVIO_FLAG_READ, NULL, NULL)) < 0)
 425         goto fail;
 426     avio_seek(f, avio_size(f) - 4, SEEK_SET);
 427     mfra_size = avio_rb32(f);
 428     avio_seek(f, -mfra_size, SEEK_CUR);
 429     if (avio_rb32(f) != mfra_size) {
 430         err = AVERROR_INVALIDDATA;
 431         err_str = "mfra size mismatch";
 432         goto fail;
 433     }
 434     if (avio_rb32(f) != MKBETAG('m', 'f', 'r', 'a')) {
 435         err = AVERROR_INVALIDDATA;
 436         err_str = "mfra tag mismatch";
 437         goto fail;
 438     }
 439     while (!read_tfra(tracks, start_index, f)) {
 440         /* Empty */
 441     }
 442
 443     if (split || ismf)
 444         err = write_fragments(tracks, start_index, f, basename, split, ismf,
 445                               output_prefix);
 446     err_str = "error in write_fragments";
 447
 448 fail:
 449     if (f)
 450         avio_close(f);
 451     if (err)
 452         fprintf(stderr, "Unable to read the MFRA atom in %s (%s)\n", file, err_str);
 453     return err;
 454 }
 455
 456 static int get_private_data(struct Track *track, AVCodecParameters *codecpar)
 457 {
 458     track->codec_private_size = 0;
 459     track->codec_private      = av_mallocz(codecpar->extradata_size);
 460     if (!track->codec_private)
 461         return AVERROR(ENOMEM);
 462     track->codec_private_size = codecpar->extradata_size;
 463     memcpy(track->codec_private, codecpar->extradata, codecpar->extradata_size);
 464     return 0;
 465 }
 466
 467 static int get_video_private_data(struct Track *track, AVCodecParameters *codecpar)
 468 {
 469     AVIOContext *io = NULL;
 470     uint16_t sps_size, pps_size;
 471     int err;
 472
 473     if (codecpar->codec_id == AV_CODEC_ID_VC1)
 474         return get_private_data(track, codecpar);
 475
 476     if ((err = avio_open_dyn_buf(&io)) < 0)
 477         goto fail;
 478     err = AVERROR(EINVAL);
 479     if (codecpar->extradata_size < 11 || codecpar->extradata[0] != 1)
 480         goto fail;
 481     sps_size = AV_RB16(&codecpar->extradata[6]);
 482     if (11 + sps_size > codecpar->extradata_size)
 483         goto fail;
 484     avio_wb32(io, 0x00000001);
 485     avio_write(io, &codecpar->extradata[8], sps_size);
 486     pps_size = AV_RB16(&codecpar->extradata[9 + sps_size]);
 487     if (11 + sps_size + pps_size > codecpar->extradata_size)
 488         goto fail;
 489     avio_wb32(io, 0x00000001);
 490     avio_write(io, &codecpar->extradata[11 + sps_size], pps_size);
 491     err = 0;
 492
 493 fail:
 494     track->codec_private_size = avio_close_dyn_buf(io, &track->codec_private);
 495     return err;
 496 }
 497
 498 static int handle_file(struct Tracks *tracks, const char *file, int split,
 499                        int ismf, const char *basename,
 500                        const char* output_prefix)
 501 {
 502     AVFormatContext *ctx = NULL;
 503     int err = 0, i, orig_tracks = tracks->nb_tracks;
 504     char errbuf[50], *ptr;
 505     struct Track *track;
 506
 507     err = avformat_open_input(&ctx, file, NULL, NULL);
 508     if (err < 0) {
 509         av_strerror(err, errbuf, sizeof(errbuf));
 510         fprintf(stderr, "Unable to open %s: %s\n", file, errbuf);
 511         return 1;
 512     }
 513
 514     err = avformat_find_stream_info(ctx, NULL);
 515     if (err < 0) {
 516         av_strerror(err, errbuf, sizeof(errbuf));
 517         fprintf(stderr, "Unable to identify %s: %s\n", file, errbuf);
 518         goto fail;
 519     }
 520
 521     if (ctx->nb_streams < 1) {
 522         fprintf(stderr, "No streams found in %s\n", file);
 523         goto fail;
 524     }
 525
 526     for (i = 0; i < ctx->nb_streams; i++) {
 527         struct Track **temp;
 528         AVStream *st = ctx->streams[i];
 529
 530         if (st->codecpar->bit_rate == 0) {
 531             fprintf(stderr, "Skipping track %d in %s as it has zero bitrate\n",
 532                     st->id, file);
 533             continue;
 534         }
 535
 536         track = av_mallocz(sizeof(*track));
 537         if (!track) {
 538             err = AVERROR(ENOMEM);
 539             goto fail;
 540         }
 541         temp = av_realloc_array(tracks->tracks,
 542                                 tracks->nb_tracks + 1,
 543                                 sizeof(*tracks->tracks));
 544         if (!temp) {
 545             av_free(track);
 546             err = AVERROR(ENOMEM);
 547             goto fail;
 548         }
 549         tracks->tracks = temp;
 550         tracks->tracks[tracks->nb_tracks] = track;
 551
 552         track->name = file;
 553         if ((ptr = strrchr(file, '/')))
 554             track->name = ptr + 1;
 555
 556         track->bitrate   = st->codecpar->bit_rate;
 557         track->track_id  = st->id;
 558         track->timescale = st->time_base.den;
 559         track->duration  = st->duration;
 560         track->is_audio  = st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO;
 561         track->is_video  = st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO;
 562
 563         if (!track->is_audio && !track->is_video) {
 564             fprintf(stderr,
 565                     "Track %d in %s is neither video nor audio, skipping\n",
 566                     track->track_id, file);
 567             av_freep(&tracks->tracks[tracks->nb_tracks]);
 568             continue;
 569         }
 570
 571         tracks->duration = FFMAX(tracks->duration,
 572                                  av_rescale_rnd(track->duration, AV_TIME_BASE,
 573                                                 track->timescale, AV_ROUND_UP));
 574
 575         if (track->is_audio) {
 576             if (tracks->audio_track < 0)
 577                 tracks->audio_track = tracks->nb_tracks;
 578             tracks->nb_audio_tracks++;
 579             track->channels    = st->codecpar->channels;
 580             track->sample_rate = st->codecpar->sample_rate;
 581             if (st->codecpar->codec_id == AV_CODEC_ID_AAC) {
 582                 track->fourcc    = "AACL";
 583                 track->tag       = 255;
 584                 track->blocksize = 4;
 585             } else if (st->codecpar->codec_id == AV_CODEC_ID_WMAPRO) {
 586                 track->fourcc    = "WMAP";
 587                 track->tag       = st->codecpar->codec_tag;
 588                 track->blocksize = st->codecpar->block_align;
 589             }
 590             get_private_data(track, st->codecpar);
 591         }
 592         if (track->is_video) {
 593             if (tracks->video_track < 0)
 594                 tracks->video_track = tracks->nb_tracks;
 595             tracks->nb_video_tracks++;
 596             track->width  = st->codecpar->width;
 597             track->height = st->codecpar->height;
 598             if (st->codecpar->codec_id == AV_CODEC_ID_H264)
 599                 track->fourcc = "H264";
 600             else if (st->codecpar->codec_id == AV_CODEC_ID_VC1)
 601                 track->fourcc = "WVC1";
 602             get_video_private_data(track, st->codecpar);
 603         }
 604
 605         tracks->nb_tracks++;
 606     }
 607
 608     avformat_close_input(&ctx);
 609
 610     err = read_mfra(tracks, orig_tracks, file, split, ismf, basename,
 611                     output_prefix);
 612
 613 fail:
 614     if (ctx)
 615         avformat_close_input(&ctx);
 616     return err;
 617 }
 618
 619 static void output_server_manifest(struct Tracks *tracks, const char *basename,
 620                                    const char *output_prefix,
 621                                    const char *path_prefix,
 622                                    const char *ismc_prefix)
 623 {
 624     char filename[1000];
 625     FILE *out;
 626     int i;
 627
 628     snprintf(filename, sizeof(filename), "%s%s.ism", output_prefix, basename);
 629     out = fopen(filename, "w");
 630     if (!out) {
 631         perror(filename);
 632         return;
 633     }
 634     fprintf(out, "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n");
 635     fprintf(out, "<smil xmlns=\"http://www.w3.org/2001/SMIL20/Language\">\n");
 636     fprintf(out, "\t<head>\n");
 637     fprintf(out, "\t\t<meta name=\"clientManifestRelativePath\" "
 638                  "content=\"%s%s.ismc\" />\n", ismc_prefix, basename);
 639     fprintf(out, "\t</head>\n");
 640     fprintf(out, "\t<body>\n");
 641     fprintf(out, "\t\t<switch>\n");
 642     for (i = 0; i < tracks->nb_tracks; i++) {
 643         struct Track *track = tracks->tracks[i];
 644         const char *type    = track->is_video ? "video" : "audio";
 645         fprintf(out, "\t\t\t<%s src=\"%s%s\" systemBitrate=\"%d\">\n",
 646                 type, path_prefix, track->name, track->bitrate);
 647         fprintf(out, "\t\t\t\t<param name=\"trackID\" value=\"%d\" "
 648                      "valueType=\"data\" />\n", track->track_id);
 649         fprintf(out, "\t\t\t</%s>\n", type);
 650     }
 651     fprintf(out, "\t\t</switch>\n");
 652     fprintf(out, "\t</body>\n");
 653     fprintf(out, "</smil>\n");
 654     fclose(out);
 655 }
 656
 657 static void print_track_chunks(FILE *out, struct Tracks *tracks, int main,
 658                                const char *type)
 659 {
 660     int i, j;
 661     int64_t pos = 0;
 662     struct Track *track = tracks->tracks[main];
 663     int should_print_time_mismatch = 1;
 664
 665     for (i = 0; i < track->chunks; i++) {
 666         for (j = main + 1; j < tracks->nb_tracks; j++) {
 667             if (tracks->tracks[j]->is_audio == track->is_audio) {
 668                 if (track->offsets[i].duration != tracks->tracks[j]->offsets[i].duration) {
 669                     fprintf(stderr, "Mismatched duration of %s chunk %d in %s (%d) and %s (%d)\n",
 670                             type, i, track->name, main, tracks->tracks[j]->name, j);
 671                     should_print_time_mismatch = 1;
 672                 }
 673                 if (track->offsets[i].time != tracks->tracks[j]->offsets[i].time) {
 674                     if (should_print_time_mismatch)
 675                         fprintf(stderr, "Mismatched (start) time of %s chunk %d in %s (%d) and %s (%d)\n",
 676                                 type, i, track->name, main, tracks->tracks[j]->name, j);
 677                     should_print_time_mismatch = 0;
 678                 }
 679             }
 680         }
 681         fprintf(out, "\t\t<c n=\"%d\" d=\"%"PRId64"\" ",
 682                 i, track->offsets[i].duration);
 683         if (pos != track->offsets[i].time) {
 684             fprintf(out, "t=\"%"PRId64"\" ", track->offsets[i].time);
 685             pos = track->offsets[i].time;
 686         }
 687         pos += track->offsets[i].duration;
 688         fprintf(out, "/>\n");
 689     }
 690 }
 691
 692 static void output_client_manifest(struct Tracks *tracks, const char *basename,
 693                                    const char *output_prefix, int split)
 694 {
 695     char filename[1000];
 696     FILE *out;
 697     int i, j;
 698
 699     if (split)
 700         snprintf(filename, sizeof(filename), "%sManifest", output_prefix);
 701     else
 702         snprintf(filename, sizeof(filename), "%s%s.ismc", output_prefix, basename);
 703     out = fopen(filename, "w");
 704     if (!out) {
 705         perror(filename);
 706         return;
 707     }
 708     fprintf(out, "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n");
 709     fprintf(out, "<SmoothStreamingMedia MajorVersion=\"2\" MinorVersion=\"0\" "
 710                  "Duration=\"%"PRId64 "\">\n", tracks->duration * 10);
 711     if (tracks->video_track >= 0) {
 712         struct Track *track = tracks->tracks[tracks->video_track];
 713         struct Track *first_track = track;
 714         int index = 0;
 715         fprintf(out,
 716                 "\t<StreamIndex Type=\"video\" QualityLevels=\"%d\" "
 717                 "Chunks=\"%d\" "
 718                 "Url=\"QualityLevels({bitrate})/Fragments(video={start time})\">\n",
 719                 tracks->nb_video_tracks, track->chunks);
 720         for (i = 0; i < tracks->nb_tracks; i++) {
 721             track = tracks->tracks[i];
 722             if (!track->is_video)
 723                 continue;
 724             fprintf(out,
 725                     "\t\t<QualityLevel Index=\"%d\" Bitrate=\"%d\" "
 726                     "FourCC=\"%s\" MaxWidth=\"%d\" MaxHeight=\"%d\" "
 727                     "CodecPrivateData=\"",
 728                     index, track->bitrate, track->fourcc, track->width, track->height);
 729             for (j = 0; j < track->codec_private_size; j++)
 730                 fprintf(out, "%02X", track->codec_private[j]);
 731             fprintf(out, "\" />\n");
 732             index++;
 733             if (track->chunks != first_track->chunks)
 734                 fprintf(stderr, "Mismatched number of video chunks in %s (id: %d, chunks %d) and %s (id: %d, chunks %d)\n",
 735                         track->name, track->track_id, track->chunks, first_track->name, first_track->track_id, first_track->chunks);
 736         }
 737         print_track_chunks(out, tracks, tracks->video_track, "video");
 738         fprintf(out, "\t</StreamIndex>\n");
 739     }
 740     if (tracks->audio_track >= 0) {
 741         struct Track *track = tracks->tracks[tracks->audio_track];
 742         struct Track *first_track = track;
 743         int index = 0;
 744         fprintf(out,
 745                 "\t<StreamIndex Type=\"audio\" QualityLevels=\"%d\" "
 746                 "Chunks=\"%d\" "
 747                 "Url=\"QualityLevels({bitrate})/Fragments(audio={start time})\">\n",
 748                 tracks->nb_audio_tracks, track->chunks);
 749         for (i = 0; i < tracks->nb_tracks; i++) {
 750             track = tracks->tracks[i];
 751             if (!track->is_audio)
 752                 continue;
 753             fprintf(out,
 754                     "\t\t<QualityLevel Index=\"%d\" Bitrate=\"%d\" "
 755                     "FourCC=\"%s\" SamplingRate=\"%d\" Channels=\"%d\" "
 756                     "BitsPerSample=\"16\" PacketSize=\"%d\" "
 757                     "AudioTag=\"%d\" CodecPrivateData=\"",
 758                     index, track->bitrate, track->fourcc, track->sample_rate,
 759                     track->channels, track->blocksize, track->tag);
 760             for (j = 0; j < track->codec_private_size; j++)
 761                 fprintf(out, "%02X", track->codec_private[j]);
 762             fprintf(out, "\" />\n");
 763             index++;
 764             if (track->chunks != first_track->chunks)
 765                 fprintf(stderr, "Mismatched number of audio chunks in %s and %s\n",
 766                         track->name, first_track->name);
 767         }
 768         print_track_chunks(out, tracks, tracks->audio_track, "audio");
 769         fprintf(out, "\t</StreamIndex>\n");
 770     }
 771     fprintf(out, "</SmoothStreamingMedia>\n");
 772     fclose(out);
 773 }
 774
 775 static void clean_tracks(struct Tracks *tracks)
 776 {
 777     int i;
 778     for (i = 0; i < tracks->nb_tracks; i++) {
 779         av_freep(&tracks->tracks[i]->codec_private);
 780         av_freep(&tracks->tracks[i]->offsets);
 781         av_freep(&tracks->tracks[i]);
 782     }
 783     av_freep(&tracks->tracks);
 784     tracks->nb_tracks = 0;
 785 }
 786
 787 int main(int argc, char **argv)
 788 {
 789     const char *basename = NULL;
 790     const char *path_prefix = "", *ismc_prefix = "";
 791     const char *output_prefix = "";
 792     char output_prefix_buf[2048];
 793     int split = 0, ismf = 0, i;
 794     struct Tracks tracks = { 0, .video_track = -1, .audio_track = -1 };
 795
 796     av_register_all();
 797
 798     for (i = 1; i < argc; i++) {
 799         if (!strcmp(argv[i], "-n")) {
 800             basename = argv[i + 1];
 801             i++;
 802         } else if (!strcmp(argv[i], "-path-prefix")) {
 803             path_prefix = argv[i + 1];
 804             i++;
 805         } else if (!strcmp(argv[i], "-ismc-prefix")) {
 806             ismc_prefix = argv[i + 1];
 807             i++;
 808         } else if (!strcmp(argv[i], "-output")) {
 809             output_prefix = argv[i + 1];
 810             i++;
 811             if (output_prefix[strlen(output_prefix) - 1] != '/') {
 812                 snprintf(output_prefix_buf, sizeof(output_prefix_buf),
 813                          "%s/", output_prefix);
 814                 output_prefix = output_prefix_buf;
 815             }
 816         } else if (!strcmp(argv[i], "-split")) {
 817             split = 1;
 818         } else if (!strcmp(argv[i], "-ismf")) {
 819             ismf = 1;
 820         } else if (argv[i][0] == '-') {
 821             return usage(argv[0], 1);
 822         } else {
 823             if (!basename)
 824                 ismf = 0;
 825             if (handle_file(&tracks, argv[i], split, ismf,
 826                             basename, output_prefix))
 827                 return 1;
 828         }
 829     }
 830     if (!tracks.nb_tracks || (!basename && !split))
 831         return usage(argv[0], 1);
 832
 833     if (!split)
 834         output_server_manifest(&tracks, basename, output_prefix,
 835                                path_prefix, ismc_prefix);
 836     output_client_manifest(&tracks, basename, output_prefix, split);
 837
 838     clean_tracks(&tracks);
 839
 840     return 0;
 841 }