git.sesse.net Git - ffmpeg/blob - 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  * By adding -path-prefix path/, the produced foo.ism will refer to the
  29  * files foo.ismv as "path/foo.ismv" - the prefix for the generated ismc
  30  * file can be set with the -ismc-prefix option similarly.
  31  *
  32  * To pre-split files for serving as static files by a web server without
  33  * any extra server support, create the ismv file as above, and split it:
  34  * ismindex -split foo.ismv
  35  * This step creates a file Manifest and directories QualityLevel(...),
  36  * that can be read directly by a smooth streaming player.
  37  *
  38  * The -output dir option can be used to request that output files
  39  * (both .ism/.ismc, or Manifest/QualityLevels* when splitting)
  40  * should be written to this directory instead of in the current directory.
  41  * (The directory itself isn't created if it doesn't already exist.)
  42  */
  43
  44 #include <stdio.h>
  45 #include <string.h>
  46
  47 #include "cmdutils.h"
  48
  49 #include "libavformat/avformat.h"
  50 #include "libavformat/os_support.h"
  51 #include "libavutil/intreadwrite.h"
  52 #include "libavutil/mathematics.h"
  53
  54 static int usage(const char *argv0, int ret)
  55 {
  56     fprintf(stderr, "%s [-split] [-n basename] [-path-prefix prefix] "
  57                     "[-ismc-prefix prefix] [-output dir] file1 [file2] ...\n", argv0);
  58     return ret;
  59 }
  60
  61 struct MoofOffset {
  62     int64_t time;
  63     int64_t offset;
  64     int64_t duration;
  65 };
  66
  67 struct Track {
  68     const char *name;
  69     int64_t duration;
  70     int bitrate;
  71     int track_id;
  72     int is_audio, is_video;
  73     int width, height;
  74     int chunks;
  75     int sample_rate, channels;
  76     uint8_t *codec_private;
  77     int codec_private_size;
  78     struct MoofOffset *offsets;
  79     int timescale;
  80     const char *fourcc;
  81     int blocksize;
  82     int tag;
  83 };
  84
  85 struct Tracks {
  86     int nb_tracks;
  87     int64_t duration;
  88     struct Track **tracks;
  89     int video_track, audio_track;
  90     int nb_video_tracks, nb_audio_tracks;
  91 };
  92
  93 static int copy_tag(AVIOContext *in, AVIOContext *out, int32_t tag_name)
  94 {
  95     int32_t size, tag;
  96
  97     size = avio_rb32(in);
  98     tag  = avio_rb32(in);
  99     avio_wb32(out, size);
 100     avio_wb32(out, tag);
 101     if (tag != tag_name)
 102         return -1;
 103     size -= 8;
 104     while (size > 0) {
 105         char buf[1024];
 106         int len = FFMIN(sizeof(buf), size);
 107         if (avio_read(in, buf, len) != len)
 108             break;
 109         avio_write(out, buf, len);
 110         size -= len;
 111     }
 112     return 0;
 113 }
 114
 115 static int write_fragment(const char *filename, AVIOContext *in)
 116 {
 117     AVIOContext *out = NULL;
 118     int ret;
 119
 120     if ((ret = avio_open2(&out, filename, AVIO_FLAG_WRITE, NULL, NULL)) < 0)
 121         return ret;
 122     copy_tag(in, out, MKBETAG('m', 'o', 'o', 'f'));
 123     copy_tag(in, out, MKBETAG('m', 'd', 'a', 't'));
 124
 125     avio_flush(out);
 126     avio_close(out);
 127
 128     return ret;
 129 }
 130
 131 static int write_fragments(struct Tracks *tracks, int start_index,
 132                            AVIOContext *in, const char *output_prefix)
 133 {
 134     char dirname[2048], filename[2048];
 135     int i, j;
 136
 137     for (i = start_index; i < tracks->nb_tracks; i++) {
 138         struct Track *track = tracks->tracks[i];
 139         const char *type    = track->is_video ? "video" : "audio";
 140         snprintf(dirname, sizeof(dirname), "%sQualityLevels(%d)", output_prefix, track->bitrate);
 141         if (mkdir(dirname, 0777) == -1)
 142             return AVERROR(errno);
 143         for (j = 0; j < track->chunks; j++) {
 144             snprintf(filename, sizeof(filename), "%s/Fragments(%s=%"PRId64")",
 145                      dirname, type, track->offsets[j].time);
 146             avio_seek(in, track->offsets[j].offset, SEEK_SET);
 147             write_fragment(filename, in);
 148         }
 149     }
 150     return 0;
 151 }
 152
 153 static int read_tfra(struct Tracks *tracks, int start_index, AVIOContext *f)
 154 {
 155     int ret = AVERROR_EOF, track_id;
 156     int version, fieldlength, i, j;
 157     int64_t pos   = avio_tell(f);
 158     uint32_t size = avio_rb32(f);
 159     struct Track *track = NULL;
 160
 161     if (avio_rb32(f) != MKBETAG('t', 'f', 'r', 'a'))
 162         goto fail;
 163     version = avio_r8(f);
 164     avio_rb24(f);
 165     track_id = avio_rb32(f); /* track id */
 166     for (i = start_index; i < tracks->nb_tracks && !track; i++)
 167         if (tracks->tracks[i]->track_id == track_id)
 168             track = tracks->tracks[i];
 169     if (!track) {
 170         /* Ok, continue parsing the next atom */
 171         ret = 0;
 172         goto fail;
 173     }
 174     fieldlength = avio_rb32(f);
 175     track->chunks  = avio_rb32(f);
 176     track->offsets = av_mallocz_array(track->chunks, sizeof(*track->offsets));
 177     if (!track->offsets) {
 178         ret = AVERROR(ENOMEM);
 179         goto fail;
 180     }
 181     for (i = 0; i < track->chunks; i++) {
 182         if (version == 1) {
 183             track->offsets[i].time   = avio_rb64(f);
 184             track->offsets[i].offset = avio_rb64(f);
 185         } else {
 186             track->offsets[i].time   = avio_rb32(f);
 187             track->offsets[i].offset = avio_rb32(f);
 188         }
 189         for (j = 0; j < ((fieldlength >> 4) & 3) + 1; j++)
 190             avio_r8(f);
 191         for (j = 0; j < ((fieldlength >> 2) & 3) + 1; j++)
 192             avio_r8(f);
 193         for (j = 0; j < ((fieldlength >> 0) & 3) + 1; j++)
 194             avio_r8(f);
 195         if (i > 0)
 196             track->offsets[i - 1].duration = track->offsets[i].time -
 197                                              track->offsets[i - 1].time;
 198     }
 199     if (track->chunks > 0)
 200         track->offsets[track->chunks - 1].duration = track->duration -
 201                                                      track->offsets[track->chunks - 1].time;
 202     ret = 0;
 203
 204 fail:
 205     avio_seek(f, pos + size, SEEK_SET);
 206     return ret;
 207 }
 208
 209 static int read_mfra(struct Tracks *tracks, int start_index,
 210                      const char *file, int split, const char *output_prefix)
 211 {
 212     int err = 0;
 213     AVIOContext *f = NULL;
 214     int32_t mfra_size;
 215
 216     if ((err = avio_open2(&f, file, AVIO_FLAG_READ, NULL, NULL)) < 0)
 217         goto fail;
 218     avio_seek(f, avio_size(f) - 4, SEEK_SET);
 219     mfra_size = avio_rb32(f);
 220     avio_seek(f, -mfra_size, SEEK_CUR);
 221     if (avio_rb32(f) != mfra_size) {
 222         err = AVERROR_INVALIDDATA;
 223         goto fail;
 224     }
 225     if (avio_rb32(f) != MKBETAG('m', 'f', 'r', 'a')) {
 226         err = AVERROR_INVALIDDATA;
 227         goto fail;
 228     }
 229     while (!read_tfra(tracks, start_index, f)) {
 230         /* Empty */
 231     }
 232
 233     if (split)
 234         err = write_fragments(tracks, start_index, f, output_prefix);
 235
 236 fail:
 237     if (f)
 238         avio_close(f);
 239     if (err)
 240         fprintf(stderr, "Unable to read the MFRA atom in %s\n", file);
 241     return err;
 242 }
 243
 244 static int get_private_data(struct Track *track, AVCodecContext *codec)
 245 {
 246     track->codec_private_size = codec->extradata_size;
 247     track->codec_private      = av_mallocz(codec->extradata_size);
 248     if (!track->codec_private)
 249         return AVERROR(ENOMEM);
 250     memcpy(track->codec_private, codec->extradata, codec->extradata_size);
 251     return 0;
 252 }
 253
 254 static int get_video_private_data(struct Track *track, AVCodecContext *codec)
 255 {
 256     AVIOContext *io = NULL;
 257     uint16_t sps_size, pps_size;
 258     int err = AVERROR(EINVAL);
 259
 260     if (codec->codec_id == AV_CODEC_ID_VC1)
 261         return get_private_data(track, codec);
 262
 263     if (avio_open_dyn_buf(&io) < 0)  {
 264         err = AVERROR(ENOMEM);
 265         goto fail;
 266     }
 267     if (codec->extradata_size < 11 || codec->extradata[0] != 1)
 268         goto fail;
 269     sps_size = AV_RB16(&codec->extradata[6]);
 270     if (11 + sps_size > codec->extradata_size)
 271         goto fail;
 272     avio_wb32(io, 0x00000001);
 273     avio_write(io, &codec->extradata[8], sps_size);
 274     pps_size = AV_RB16(&codec->extradata[9 + sps_size]);
 275     if (11 + sps_size + pps_size > codec->extradata_size)
 276         goto fail;
 277     avio_wb32(io, 0x00000001);
 278     avio_write(io, &codec->extradata[11 + sps_size], pps_size);
 279     err = 0;
 280
 281 fail:
 282     track->codec_private_size = avio_close_dyn_buf(io, &track->codec_private);
 283     return err;
 284 }
 285
 286 static int handle_file(struct Tracks *tracks, const char *file, int split,
 287                        const char *output_prefix)
 288 {
 289     AVFormatContext *ctx = NULL;
 290     int err = 0, i, orig_tracks = tracks->nb_tracks;
 291     char errbuf[50], *ptr;
 292     struct Track *track;
 293
 294     err = avformat_open_input(&ctx, file, NULL, NULL);
 295     if (err < 0) {
 296         av_strerror(err, errbuf, sizeof(errbuf));
 297         fprintf(stderr, "Unable to open %s: %s\n", file, errbuf);
 298         return 1;
 299     }
 300
 301     err = avformat_find_stream_info(ctx, NULL);
 302     if (err < 0) {
 303         av_strerror(err, errbuf, sizeof(errbuf));
 304         fprintf(stderr, "Unable to identify %s: %s\n", file, errbuf);
 305         goto fail;
 306     }
 307
 308     if (ctx->nb_streams < 1) {
 309         fprintf(stderr, "No streams found in %s\n", file);
 310         goto fail;
 311     }
 312
 313     for (i = 0; i < ctx->nb_streams; i++) {
 314         struct Track **temp;
 315         AVStream *st = ctx->streams[i];
 316         track = av_mallocz(sizeof(*track));
 317         if (!track) {
 318             err = AVERROR(ENOMEM);
 319             goto fail;
 320         }
 321         temp = av_realloc(tracks->tracks,
 322                           sizeof(*tracks->tracks) * (tracks->nb_tracks + 1));
 323         if (!temp) {
 324             av_free(track);
 325             err = AVERROR(ENOMEM);
 326             goto fail;
 327         }
 328         tracks->tracks = temp;
 329         tracks->tracks[tracks->nb_tracks] = track;
 330
 331         track->name = file;
 332         if ((ptr = strrchr(file, '/')) != NULL)
 333             track->name = ptr + 1;
 334
 335         track->bitrate   = st->codec->bit_rate;
 336         track->track_id  = st->id;
 337         track->timescale = st->time_base.den;
 338         track->duration  = st->duration;
 339         track->is_audio  = st->codec->codec_type == AVMEDIA_TYPE_AUDIO;
 340         track->is_video  = st->codec->codec_type == AVMEDIA_TYPE_VIDEO;
 341
 342         if (!track->is_audio && !track->is_video) {
 343             fprintf(stderr,
 344                     "Track %d in %s is neither video nor audio, skipping\n",
 345                     track->track_id, file);
 346             av_freep(&tracks->tracks[tracks->nb_tracks]);
 347             continue;
 348         }
 349
 350         tracks->duration = FFMAX(tracks->duration,
 351                                  av_rescale_rnd(track->duration, AV_TIME_BASE,
 352                                                 track->timescale, AV_ROUND_UP));
 353
 354         if (track->is_audio) {
 355             if (tracks->audio_track < 0)
 356                 tracks->audio_track = tracks->nb_tracks;
 357             tracks->nb_audio_tracks++;
 358             track->channels    = st->codec->channels;
 359             track->sample_rate = st->codec->sample_rate;
 360             if (st->codec->codec_id == AV_CODEC_ID_AAC) {
 361                 track->fourcc    = "AACL";
 362                 track->tag       = 255;
 363                 track->blocksize = 4;
 364             } else if (st->codec->codec_id == AV_CODEC_ID_WMAPRO) {
 365                 track->fourcc    = "WMAP";
 366                 track->tag       = st->codec->codec_tag;
 367                 track->blocksize = st->codec->block_align;
 368             }
 369             get_private_data(track, st->codec);
 370         }
 371         if (track->is_video) {
 372             if (tracks->video_track < 0)
 373                 tracks->video_track = tracks->nb_tracks;
 374             tracks->nb_video_tracks++;
 375             track->width  = st->codec->width;
 376             track->height = st->codec->height;
 377             if (st->codec->codec_id == AV_CODEC_ID_H264)
 378                 track->fourcc = "H264";
 379             else if (st->codec->codec_id == AV_CODEC_ID_VC1)
 380                 track->fourcc = "WVC1";
 381             get_video_private_data(track, st->codec);
 382         }
 383
 384         tracks->nb_tracks++;
 385     }
 386
 387     avformat_close_input(&ctx);
 388
 389     err = read_mfra(tracks, orig_tracks, file, split, output_prefix);
 390
 391 fail:
 392     if (ctx)
 393         avformat_close_input(&ctx);
 394     return err;
 395 }
 396
 397 static void output_server_manifest(struct Tracks *tracks, const char *basename,
 398                                    const char *output_prefix,
 399                                    const char *path_prefix,
 400                                    const char *ismc_prefix)
 401 {
 402     char filename[1000];
 403     FILE *out;
 404     int i;
 405
 406     snprintf(filename, sizeof(filename), "%s%s.ism", output_prefix, basename);
 407     out = fopen(filename, "w");
 408     if (!out) {
 409         perror(filename);
 410         return;
 411     }
 412     fprintf(out, "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n");
 413     fprintf(out, "<smil xmlns=\"http://www.w3.org/2001/SMIL20/Language\">\n");
 414     fprintf(out, "\t<head>\n");
 415     fprintf(out, "\t\t<meta name=\"clientManifestRelativePath\" "
 416                  "content=\"%s%s.ismc\" />\n", ismc_prefix, basename);
 417     fprintf(out, "\t</head>\n");
 418     fprintf(out, "\t<body>\n");
 419     fprintf(out, "\t\t<switch>\n");
 420     for (i = 0; i < tracks->nb_tracks; i++) {
 421         struct Track *track = tracks->tracks[i];
 422         const char *type    = track->is_video ? "video" : "audio";
 423         fprintf(out, "\t\t\t<%s src=\"%s%s\" systemBitrate=\"%d\">\n",
 424                 type, path_prefix, track->name, track->bitrate);
 425         fprintf(out, "\t\t\t\t<param name=\"trackID\" value=\"%d\" "
 426                      "valueType=\"data\" />\n", track->track_id);
 427         fprintf(out, "\t\t\t</%s>\n", type);
 428     }
 429     fprintf(out, "\t\t</switch>\n");
 430     fprintf(out, "\t</body>\n");
 431     fprintf(out, "</smil>\n");
 432     fclose(out);
 433 }
 434
 435 static void print_track_chunks(FILE *out, struct Tracks *tracks, int main,
 436                                const char *type)
 437 {
 438     int i, j;
 439     struct Track *track = tracks->tracks[main];
 440     for (i = 0; i < track->chunks; i++) {
 441         for (j = main + 1; j < tracks->nb_tracks; j++) {
 442             if (tracks->tracks[j]->is_audio == track->is_audio &&
 443                 track->offsets[i].duration != tracks->tracks[j]->offsets[i].duration)
 444                 fprintf(stderr, "Mismatched duration of %s chunk %d in %s and %s\n",
 445                         type, i, track->name, tracks->tracks[j]->name);
 446         }
 447         fprintf(out, "\t\t<c n=\"%d\" d=\"%"PRId64"\" />\n",
 448                 i, track->offsets[i].duration);
 449     }
 450 }
 451
 452 static void output_client_manifest(struct Tracks *tracks, const char *basename,
 453                                    const char *output_prefix, int split)
 454 {
 455     char filename[1000];
 456     FILE *out;
 457     int i, j;
 458
 459     if (split)
 460         snprintf(filename, sizeof(filename), "%sManifest", output_prefix);
 461     else
 462         snprintf(filename, sizeof(filename), "%s%s.ismc", output_prefix, basename);
 463     out = fopen(filename, "w");
 464     if (!out) {
 465         perror(filename);
 466         return;
 467     }
 468     fprintf(out, "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n");
 469     fprintf(out, "<SmoothStreamingMedia MajorVersion=\"2\" MinorVersion=\"0\" "
 470                  "Duration=\"%"PRId64 "\">\n", tracks->duration * 10);
 471     if (tracks->video_track >= 0) {
 472         struct Track *track = tracks->tracks[tracks->video_track];
 473         struct Track *first_track = track;
 474         int index = 0;
 475         fprintf(out,
 476                 "\t<StreamIndex Type=\"video\" QualityLevels=\"%d\" "
 477                 "Chunks=\"%d\" "
 478                 "Url=\"QualityLevels({bitrate})/Fragments(video={start time})\">\n",
 479                 tracks->nb_video_tracks, track->chunks);
 480         for (i = 0; i < tracks->nb_tracks; i++) {
 481             track = tracks->tracks[i];
 482             if (!track->is_video)
 483                 continue;
 484             fprintf(out,
 485                     "\t\t<QualityLevel Index=\"%d\" Bitrate=\"%d\" "
 486                     "FourCC=\"%s\" MaxWidth=\"%d\" MaxHeight=\"%d\" "
 487                     "CodecPrivateData=\"",
 488                     index, track->bitrate, track->fourcc, track->width, track->height);
 489             for (j = 0; j < track->codec_private_size; j++)
 490                 fprintf(out, "%02X", track->codec_private[j]);
 491             fprintf(out, "\" />\n");
 492             index++;
 493             if (track->chunks != first_track->chunks)
 494                 fprintf(stderr, "Mismatched number of video chunks in %s and %s\n",
 495                         track->name, first_track->name);
 496         }
 497         print_track_chunks(out, tracks, tracks->video_track, "video");
 498         fprintf(out, "\t</StreamIndex>\n");
 499     }
 500     if (tracks->audio_track >= 0) {
 501         struct Track *track = tracks->tracks[tracks->audio_track];
 502         struct Track *first_track = track;
 503         int index = 0;
 504         fprintf(out,
 505                 "\t<StreamIndex Type=\"audio\" QualityLevels=\"%d\" "
 506                 "Chunks=\"%d\" "
 507                 "Url=\"QualityLevels({bitrate})/Fragments(audio={start time})\">\n",
 508                 tracks->nb_audio_tracks, track->chunks);
 509         for (i = 0; i < tracks->nb_tracks; i++) {
 510             track = tracks->tracks[i];
 511             if (!track->is_audio)
 512                 continue;
 513             fprintf(out,
 514                     "\t\t<QualityLevel Index=\"%d\" Bitrate=\"%d\" "
 515                     "FourCC=\"%s\" SamplingRate=\"%d\" Channels=\"%d\" "
 516                     "BitsPerSample=\"16\" PacketSize=\"%d\" "
 517                     "AudioTag=\"%d\" CodecPrivateData=\"",
 518                     index, track->bitrate, track->fourcc, track->sample_rate,
 519                     track->channels, track->blocksize, track->tag);
 520             for (j = 0; j < track->codec_private_size; j++)
 521                 fprintf(out, "%02X", track->codec_private[j]);
 522             fprintf(out, "\" />\n");
 523             index++;
 524             if (track->chunks != first_track->chunks)
 525                 fprintf(stderr, "Mismatched number of audio chunks in %s and %s\n",
 526                         track->name, first_track->name);
 527         }
 528         print_track_chunks(out, tracks, tracks->audio_track, "audio");
 529         fprintf(out, "\t</StreamIndex>\n");
 530     }
 531     fprintf(out, "</SmoothStreamingMedia>\n");
 532     fclose(out);
 533 }
 534
 535 static void clean_tracks(struct Tracks *tracks)
 536 {
 537     int i;
 538     for (i = 0; i < tracks->nb_tracks; i++) {
 539         av_freep(&tracks->tracks[i]->codec_private);
 540         av_freep(&tracks->tracks[i]->offsets);
 541         av_freep(&tracks->tracks[i]);
 542     }
 543     av_freep(&tracks->tracks);
 544     tracks->nb_tracks = 0;
 545 }
 546
 547 int main(int argc, char **argv)
 548 {
 549     const char *basename = NULL;
 550     const char *path_prefix = "", *ismc_prefix = "";
 551     const char *output_prefix = "";
 552     char output_prefix_buf[2048];
 553     int split = 0, i;
 554     struct Tracks tracks = { 0, .video_track = -1, .audio_track = -1 };
 555
 556     av_register_all();
 557
 558     for (i = 1; i < argc; i++) {
 559         if (!strcmp(argv[i], "-n")) {
 560             basename = argv[i + 1];
 561             i++;
 562         } else if (!strcmp(argv[i], "-path-prefix")) {
 563             path_prefix = argv[i + 1];
 564             i++;
 565         } else if (!strcmp(argv[i], "-ismc-prefix")) {
 566             ismc_prefix = argv[i + 1];
 567             i++;
 568         } else if (!strcmp(argv[i], "-output")) {
 569             output_prefix = argv[i + 1];
 570             i++;
 571             if (output_prefix[strlen(output_prefix) - 1] != '/') {
 572                 snprintf(output_prefix_buf, sizeof(output_prefix_buf),
 573                          "%s/", output_prefix);
 574                 output_prefix = output_prefix_buf;
 575             }
 576         } else if (!strcmp(argv[i], "-split")) {
 577             split = 1;
 578         } else if (argv[i][0] == '-') {
 579             return usage(argv[0], 1);
 580         } else {
 581             if (handle_file(&tracks, argv[i], split, output_prefix))
 582                 return 1;
 583         }
 584     }
 585     if (!tracks.nb_tracks || (!basename && !split))
 586         return usage(argv[0], 1);
 587
 588     if (!split)
 589         output_server_manifest(&tracks, basename, output_prefix,
 590                                path_prefix, ismc_prefix);
 591     output_client_manifest(&tracks, basename, output_prefix, split);
 592
 593     clean_tracks(&tracks);
 594
 595     return 0;
 596 }