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