git.sesse.net Git - ffmpeg/blob - tools/ismindex.c

   1 /*
   2  * Copyright (c) 2012 Martin Storsjo
   3  *
   4  * This file is part of Libav.
   5  *
   6  * Libav 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  * Libav 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 Libav; 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  * avconv <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 "libavformat/avformat.h"
  48 #include "libavformat/os_support.h"
  49 #include "libavutil/intreadwrite.h"
  50 #include "libavutil/mathematics.h"
  51
  52 static int usage(const char *argv0, int ret)
  53 {
  54     fprintf(stderr, "%s [-split] [-n basename] [-path-prefix prefix] "
  55                     "[-ismc-prefix prefix] [-output dir] file1 [file2] ...\n", argv0);
  56     return ret;
  57 }
  58
  59 struct MoofOffset {
  60     int64_t time;
  61     int64_t offset;
  62     int64_t duration;
  63 };
  64
  65 struct Track {
  66     const char *name;
  67     int64_t duration;
  68     int bitrate;
  69     int track_id;
  70     int is_audio, is_video;
  71     int width, height;
  72     int chunks;
  73     int sample_rate, channels;
  74     uint8_t *codec_private;
  75     int codec_private_size;
  76     struct MoofOffset *offsets;
  77     int timescale;
  78     const char *fourcc;
  79     int blocksize;
  80     int tag;
  81 };
  82
  83 struct Tracks {
  84     int nb_tracks;
  85     int64_t duration;
  86     struct Track **tracks;
  87     int video_track, audio_track;
  88     int nb_video_tracks, nb_audio_tracks;
  89 };
  90
  91 static int copy_tag(AVIOContext *in, AVIOContext *out, int32_t tag_name)
  92 {
  93     int32_t size, tag;
  94
  95     size = avio_rb32(in);
  96     tag  = avio_rb32(in);
  97     avio_wb32(out, size);
  98     avio_wb32(out, tag);
  99     if (tag != tag_name)
 100         return -1;
 101     size -= 8;
 102     while (size > 0) {
 103         char buf[1024];
 104         int len = FFMIN(sizeof(buf), size);
 105         if (avio_read(in, buf, len) != len)
 106             break;
 107         avio_write(out, buf, len);
 108         size -= len;
 109     }
 110     return 0;
 111 }
 112
 113 static int write_fragment(const char *filename, AVIOContext *in)
 114 {
 115     AVIOContext *out = NULL;
 116     int ret;
 117
 118     if ((ret = avio_open2(&out, filename, AVIO_FLAG_WRITE, NULL, NULL)) < 0)
 119         return ret;
 120     copy_tag(in, out, MKBETAG('m', 'o', 'o', 'f'));
 121     copy_tag(in, out, MKBETAG('m', 'd', 'a', 't'));
 122
 123     avio_flush(out);
 124     avio_close(out);
 125
 126     return ret;
 127 }
 128
 129 static int write_fragments(struct Tracks *tracks, int start_index,
 130                            AVIOContext *in, const char *output_prefix)
 131 {
 132     char dirname[2048], filename[2048];
 133     int i, j;
 134
 135     for (i = start_index; i < tracks->nb_tracks; i++) {
 136         struct Track *track = tracks->tracks[i];
 137         const char *type    = track->is_video ? "video" : "audio";
 138         snprintf(dirname, sizeof(dirname), "%sQualityLevels(%d)", output_prefix, track->bitrate);
 139         mkdir(dirname, 0777);
 140         for (j = 0; j < track->chunks; j++) {
 141             snprintf(filename, sizeof(filename), "%s/Fragments(%s=%"PRId64")",
 142                      dirname, type, track->offsets[j].time);
 143             avio_seek(in, track->offsets[j].offset, SEEK_SET);
 144             write_fragment(filename, in);
 145         }
 146     }
 147     return 0;
 148 }
 149
 150 static int read_tfra(struct Tracks *tracks, int start_index, AVIOContext *f)
 151 {
 152     int ret = AVERROR_EOF, track_id;
 153     int version, fieldlength, i, j;
 154     int64_t pos   = avio_tell(f);
 155     uint32_t size = avio_rb32(f);
 156     struct Track *track = NULL;
 157
 158     if (avio_rb32(f) != MKBETAG('t', 'f', 'r', 'a'))
 159         goto fail;
 160     version = avio_r8(f);
 161     avio_rb24(f);
 162     track_id = avio_rb32(f); /* track id */
 163     for (i = start_index; i < tracks->nb_tracks && !track; i++)
 164         if (tracks->tracks[i]->track_id == track_id)
 165             track = tracks->tracks[i];
 166     if (!track) {
 167         /* Ok, continue parsing the next atom */
 168         ret = 0;
 169         goto fail;
 170     }
 171     fieldlength = avio_rb32(f);
 172     track->chunks  = avio_rb32(f);
 173     track->offsets = av_mallocz(sizeof(*track->offsets) * track->chunks);
 174     if (!track->offsets) {
 175         ret = AVERROR(ENOMEM);
 176         goto fail;
 177     }
 178     for (i = 0; i < track->chunks; i++) {
 179         if (version == 1) {
 180             track->offsets[i].time   = avio_rb64(f);
 181             track->offsets[i].offset = avio_rb64(f);
 182         } else {
 183             track->offsets[i].time   = avio_rb32(f);
 184             track->offsets[i].offset = avio_rb32(f);
 185         }
 186         for (j = 0; j < ((fieldlength >> 4) & 3) + 1; j++)
 187             avio_r8(f);
 188         for (j = 0; j < ((fieldlength >> 2) & 3) + 1; j++)
 189             avio_r8(f);
 190         for (j = 0; j < ((fieldlength >> 0) & 3) + 1; j++)
 191             avio_r8(f);
 192         if (i > 0)
 193             track->offsets[i - 1].duration = track->offsets[i].time -
 194                                              track->offsets[i - 1].time;
 195     }
 196     if (track->chunks > 0)
 197         track->offsets[track->chunks - 1].duration = track->duration -
 198                                                      track->offsets[track->chunks - 1].time;
 199     ret = 0;
 200
 201 fail:
 202     avio_seek(f, pos + size, SEEK_SET);
 203     return ret;
 204 }
 205
 206 static int read_mfra(struct Tracks *tracks, int start_index,
 207                      const char *file, int split, const char *output_prefix)
 208 {
 209     int err = 0;
 210     AVIOContext *f = NULL;
 211     int32_t mfra_size;
 212
 213     if ((err = avio_open2(&f, file, AVIO_FLAG_READ, NULL, NULL)) < 0)
 214         goto fail;
 215     avio_seek(f, avio_size(f) - 4, SEEK_SET);
 216     mfra_size = avio_rb32(f);
 217     avio_seek(f, -mfra_size, SEEK_CUR);
 218     if (avio_rb32(f) != mfra_size) {
 219         err = AVERROR_INVALIDDATA;
 220         goto fail;
 221     }
 222     if (avio_rb32(f) != MKBETAG('m', 'f', 'r', 'a')) {
 223         err = AVERROR_INVALIDDATA;
 224         goto fail;
 225     }
 226     while (!read_tfra(tracks, start_index, f)) {
 227         /* Empty */
 228     }
 229
 230     if (split)
 231         write_fragments(tracks, start_index, f, output_prefix);
 232
 233 fail:
 234     if (f)
 235         avio_close(f);
 236     if (err)
 237         fprintf(stderr, "Unable to read the MFRA atom in %s\n", file);
 238     return err;
 239 }
 240
 241 static int get_private_data(struct Track *track, AVCodecContext *codec)
 242 {
 243     track->codec_private_size = codec->extradata_size;
 244     track->codec_private      = av_mallocz(codec->extradata_size);
 245     if (!track->codec_private)
 246         return AVERROR(ENOMEM);
 247     memcpy(track->codec_private, codec->extradata, codec->extradata_size);
 248     return 0;
 249 }
 250
 251 static int get_video_private_data(struct Track *track, AVCodecContext *codec)
 252 {
 253     AVIOContext *io = NULL;
 254     uint16_t sps_size, pps_size;
 255     int err = AVERROR(EINVAL);
 256
 257     if (codec->codec_id == AV_CODEC_ID_VC1)
 258         return get_private_data(track, codec);
 259
 260     avio_open_dyn_buf(&io);
 261     if (codec->extradata_size < 11 || codec->extradata[0] != 1)
 262         goto fail;
 263     sps_size = AV_RB16(&codec->extradata[6]);
 264     if (11 + sps_size > codec->extradata_size)
 265         goto fail;
 266     avio_wb32(io, 0x00000001);
 267     avio_write(io, &codec->extradata[8], sps_size);
 268     pps_size = AV_RB16(&codec->extradata[9 + sps_size]);
 269     if (11 + sps_size + pps_size > codec->extradata_size)
 270         goto fail;
 271     avio_wb32(io, 0x00000001);
 272     avio_write(io, &codec->extradata[11 + sps_size], pps_size);
 273     err = 0;
 274
 275 fail:
 276     track->codec_private_size = avio_close_dyn_buf(io, &track->codec_private);
 277     return err;
 278 }
 279
 280 static int handle_file(struct Tracks *tracks, const char *file, int split,
 281                        const char *output_prefix)
 282 {
 283     AVFormatContext *ctx = NULL;
 284     int err = 0, i, orig_tracks = tracks->nb_tracks;
 285     char errbuf[50], *ptr;
 286     struct Track *track;
 287
 288     err = avformat_open_input(&ctx, file, NULL, NULL);
 289     if (err < 0) {
 290         av_strerror(err, errbuf, sizeof(errbuf));
 291         fprintf(stderr, "Unable to open %s: %s\n", file, errbuf);
 292         return 1;
 293     }
 294
 295     err = avformat_find_stream_info(ctx, NULL);
 296     if (err < 0) {
 297         av_strerror(err, errbuf, sizeof(errbuf));
 298         fprintf(stderr, "Unable to identify %s: %s\n", file, errbuf);
 299         goto fail;
 300     }
 301
 302     if (ctx->nb_streams < 1) {
 303         fprintf(stderr, "No streams found in %s\n", file);
 304         goto fail;
 305     }
 306
 307     for (i = 0; i < ctx->nb_streams; i++) {
 308         struct Track **temp;
 309         AVStream *st = ctx->streams[i];
 310         track = av_mallocz(sizeof(*track));
 311         if (!track) {
 312             err = AVERROR(ENOMEM);
 313             goto fail;
 314         }
 315         temp = av_realloc(tracks->tracks,
 316                           sizeof(*tracks->tracks) * (tracks->nb_tracks + 1));
 317         if (!temp) {
 318             av_free(track);
 319             err = AVERROR(ENOMEM);
 320             goto fail;
 321         }
 322         tracks->tracks = temp;
 323         tracks->tracks[tracks->nb_tracks] = track;
 324
 325         track->name = file;
 326         if ((ptr = strrchr(file, '/')) != NULL)
 327             track->name = ptr + 1;
 328
 329         track->bitrate   = st->codec->bit_rate;
 330         track->track_id  = st->id;
 331         track->timescale = st->time_base.den;
 332         track->duration  = st->duration;
 333         track->is_audio  = st->codec->codec_type == AVMEDIA_TYPE_AUDIO;
 334         track->is_video  = st->codec->codec_type == AVMEDIA_TYPE_VIDEO;
 335
 336         if (!track->is_audio && !track->is_video) {
 337             fprintf(stderr,
 338                     "Track %d in %s is neither video nor audio, skipping\n",
 339                     track->track_id, file);
 340             av_freep(&tracks->tracks[tracks->nb_tracks]);
 341             continue;
 342         }
 343
 344         tracks->duration = FFMAX(tracks->duration,
 345                                  av_rescale_rnd(track->duration, AV_TIME_BASE,
 346                                                 track->timescale, AV_ROUND_UP));
 347
 348         if (track->is_audio) {
 349             if (tracks->audio_track < 0)
 350                 tracks->audio_track = tracks->nb_tracks;
 351             tracks->nb_audio_tracks++;
 352             track->channels    = st->codec->channels;
 353             track->sample_rate = st->codec->sample_rate;
 354             if (st->codec->codec_id == AV_CODEC_ID_AAC) {
 355                 track->fourcc    = "AACL";
 356                 track->tag       = 255;
 357                 track->blocksize = 4;
 358             } else if (st->codec->codec_id == AV_CODEC_ID_WMAPRO) {
 359                 track->fourcc    = "WMAP";
 360                 track->tag       = st->codec->codec_tag;
 361                 track->blocksize = st->codec->block_align;
 362             }
 363             get_private_data(track, st->codec);
 364         }
 365         if (track->is_video) {
 366             if (tracks->video_track < 0)
 367                 tracks->video_track = tracks->nb_tracks;
 368             tracks->nb_video_tracks++;
 369             track->width  = st->codec->width;
 370             track->height = st->codec->height;
 371             if (st->codec->codec_id == AV_CODEC_ID_H264)
 372                 track->fourcc = "H264";
 373             else if (st->codec->codec_id == AV_CODEC_ID_VC1)
 374                 track->fourcc = "WVC1";
 375             get_video_private_data(track, st->codec);
 376         }
 377
 378         tracks->nb_tracks++;
 379     }
 380
 381     avformat_close_input(&ctx);
 382
 383     err = read_mfra(tracks, orig_tracks, file, split, output_prefix);
 384
 385 fail:
 386     if (ctx)
 387         avformat_close_input(&ctx);
 388     return err;
 389 }
 390
 391 static void output_server_manifest(struct Tracks *tracks, const char *basename,
 392                                    const char *output_prefix,
 393                                    const char *path_prefix,
 394                                    const char *ismc_prefix)
 395 {
 396     char filename[1000];
 397     FILE *out;
 398     int i;
 399
 400     snprintf(filename, sizeof(filename), "%s%s.ism", output_prefix, basename);
 401     out = fopen(filename, "w");
 402     if (!out) {
 403         perror(filename);
 404         return;
 405     }
 406     fprintf(out, "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n");
 407     fprintf(out, "<smil xmlns=\"http://www.w3.org/2001/SMIL20/Language\">\n");
 408     fprintf(out, "\t<head>\n");
 409     fprintf(out, "\t\t<meta name=\"clientManifestRelativePath\" "
 410                  "content=\"%s%s.ismc\" />\n", ismc_prefix, basename);
 411     fprintf(out, "\t</head>\n");
 412     fprintf(out, "\t<body>\n");
 413     fprintf(out, "\t\t<switch>\n");
 414     for (i = 0; i < tracks->nb_tracks; i++) {
 415         struct Track *track = tracks->tracks[i];
 416         const char *type    = track->is_video ? "video" : "audio";
 417         fprintf(out, "\t\t\t<%s src=\"%s%s\" systemBitrate=\"%d\">\n",
 418                 type, path_prefix, track->name, track->bitrate);
 419         fprintf(out, "\t\t\t\t<param name=\"trackID\" value=\"%d\" "
 420                      "valueType=\"data\" />\n", track->track_id);
 421         fprintf(out, "\t\t\t</%s>\n", type);
 422     }
 423     fprintf(out, "\t\t</switch>\n");
 424     fprintf(out, "\t</body>\n");
 425     fprintf(out, "</smil>\n");
 426     fclose(out);
 427 }
 428
 429 static void print_track_chunks(FILE *out, struct Tracks *tracks, int main,
 430                                const char *type)
 431 {
 432     int i, j;
 433     struct Track *track = tracks->tracks[main];
 434     for (i = 0; i < track->chunks; i++) {
 435         for (j = main + 1; j < tracks->nb_tracks; j++) {
 436             if (tracks->tracks[j]->is_audio == track->is_audio &&
 437                 track->offsets[i].duration != tracks->tracks[j]->offsets[i].duration)
 438                 fprintf(stderr, "Mismatched duration of %s chunk %d in %s and %s\n",
 439                         type, i, track->name, tracks->tracks[j]->name);
 440         }
 441         fprintf(out, "\t\t<c n=\"%d\" d=\"%"PRId64"\" />\n",
 442                 i, track->offsets[i].duration);
 443     }
 444 }
 445
 446 static void output_client_manifest(struct Tracks *tracks, const char *basename,
 447                                    const char *output_prefix, int split)
 448 {
 449     char filename[1000];
 450     FILE *out;
 451     int i, j;
 452
 453     if (split)
 454         snprintf(filename, sizeof(filename), "%sManifest", output_prefix);
 455     else
 456         snprintf(filename, sizeof(filename), "%s%s.ismc", output_prefix, basename);
 457     out = fopen(filename, "w");
 458     if (!out) {
 459         perror(filename);
 460         return;
 461     }
 462     fprintf(out, "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n");
 463     fprintf(out, "<SmoothStreamingMedia MajorVersion=\"2\" MinorVersion=\"0\" "
 464                  "Duration=\"%"PRId64 "\">\n", tracks->duration * 10);
 465     if (tracks->video_track >= 0) {
 466         struct Track *track = tracks->tracks[tracks->video_track];
 467         struct Track *first_track = track;
 468         int index = 0;
 469         fprintf(out,
 470                 "\t<StreamIndex Type=\"video\" QualityLevels=\"%d\" "
 471                 "Chunks=\"%d\" "
 472                 "Url=\"QualityLevels({bitrate})/Fragments(video={start time})\">\n",
 473                 tracks->nb_video_tracks, track->chunks);
 474         for (i = 0; i < tracks->nb_tracks; i++) {
 475             track = tracks->tracks[i];
 476             if (!track->is_video)
 477                 continue;
 478             fprintf(out,
 479                     "\t\t<QualityLevel Index=\"%d\" Bitrate=\"%d\" "
 480                     "FourCC=\"%s\" MaxWidth=\"%d\" MaxHeight=\"%d\" "
 481                     "CodecPrivateData=\"",
 482                     index, track->bitrate, track->fourcc, track->width, track->height);
 483             for (j = 0; j < track->codec_private_size; j++)
 484                 fprintf(out, "%02X", track->codec_private[j]);
 485             fprintf(out, "\" />\n");
 486             index++;
 487             if (track->chunks != first_track->chunks)
 488                 fprintf(stderr, "Mismatched number of video chunks in %s and %s\n",
 489                         track->name, first_track->name);
 490         }
 491         print_track_chunks(out, tracks, tracks->video_track, "video");
 492         fprintf(out, "\t</StreamIndex>\n");
 493     }
 494     if (tracks->audio_track >= 0) {
 495         struct Track *track = tracks->tracks[tracks->audio_track];
 496         struct Track *first_track = track;
 497         int index = 0;
 498         fprintf(out,
 499                 "\t<StreamIndex Type=\"audio\" QualityLevels=\"%d\" "
 500                 "Chunks=\"%d\" "
 501                 "Url=\"QualityLevels({bitrate})/Fragments(audio={start time})\">\n",
 502                 tracks->nb_audio_tracks, track->chunks);
 503         for (i = 0; i < tracks->nb_tracks; i++) {
 504             track = tracks->tracks[i];
 505             if (!track->is_audio)
 506                 continue;
 507             fprintf(out,
 508                     "\t\t<QualityLevel Index=\"%d\" Bitrate=\"%d\" "
 509                     "FourCC=\"%s\" SamplingRate=\"%d\" Channels=\"%d\" "
 510                     "BitsPerSample=\"16\" PacketSize=\"%d\" "
 511                     "AudioTag=\"%d\" CodecPrivateData=\"",
 512                     index, track->bitrate, track->fourcc, track->sample_rate,
 513                     track->channels, track->blocksize, track->tag);
 514             for (j = 0; j < track->codec_private_size; j++)
 515                 fprintf(out, "%02X", track->codec_private[j]);
 516             fprintf(out, "\" />\n");
 517             index++;
 518             if (track->chunks != first_track->chunks)
 519                 fprintf(stderr, "Mismatched number of audio chunks in %s and %s\n",
 520                         track->name, first_track->name);
 521         }
 522         print_track_chunks(out, tracks, tracks->audio_track, "audio");
 523         fprintf(out, "\t</StreamIndex>\n");
 524     }
 525     fprintf(out, "</SmoothStreamingMedia>\n");
 526     fclose(out);
 527 }
 528
 529 static void clean_tracks(struct Tracks *tracks)
 530 {
 531     int i;
 532     for (i = 0; i < tracks->nb_tracks; i++) {
 533         av_freep(&tracks->tracks[i]->codec_private);
 534         av_freep(&tracks->tracks[i]->offsets);
 535         av_freep(&tracks->tracks[i]);
 536     }
 537     av_freep(&tracks->tracks);
 538     tracks->nb_tracks = 0;
 539 }
 540
 541 int main(int argc, char **argv)
 542 {
 543     const char *basename = NULL;
 544     const char *path_prefix = "", *ismc_prefix = "";
 545     const char *output_prefix = "";
 546     char output_prefix_buf[2048];
 547     int split = 0, i;
 548     struct Tracks tracks = { 0, .video_track = -1, .audio_track = -1 };
 549
 550     av_register_all();
 551
 552     for (i = 1; i < argc; i++) {
 553         if (!strcmp(argv[i], "-n")) {
 554             basename = argv[i + 1];
 555             i++;
 556         } else if (!strcmp(argv[i], "-path-prefix")) {
 557             path_prefix = argv[i + 1];
 558             i++;
 559         } else if (!strcmp(argv[i], "-ismc-prefix")) {
 560             ismc_prefix = argv[i + 1];
 561             i++;
 562         } else if (!strcmp(argv[i], "-output")) {
 563             output_prefix = argv[i + 1];
 564             i++;
 565             if (output_prefix[strlen(output_prefix) - 1] != '/') {
 566                 snprintf(output_prefix_buf, sizeof(output_prefix_buf),
 567                          "%s/", output_prefix);
 568                 output_prefix = output_prefix_buf;
 569             }
 570         } else if (!strcmp(argv[i], "-split")) {
 571             split = 1;
 572         } else if (argv[i][0] == '-') {
 573             return usage(argv[0], 1);
 574         } else {
 575             if (handle_file(&tracks, argv[i], split, output_prefix))
 576                 return 1;
 577         }
 578     }
 579     if (!tracks.nb_tracks || (!basename && !split))
 580         return usage(argv[0], 1);
 581
 582     if (!split)
 583         output_server_manifest(&tracks, basename, output_prefix,
 584                                path_prefix, ismc_prefix);
 585     output_client_manifest(&tracks, basename, output_prefix, split);
 586
 587     clean_tracks(&tracks);
 588
 589     return 0;
 590 }