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