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  * 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 #include <sys/stat.h>
  38 #ifdef _WIN32
  39 #include <direct.h>
  40 #define mkdir(a, b) _mkdir(a)
  41 #endif
  42
  43 #include "cmdutils.h"
  44
  45 #include "libavformat/avformat.h"
  46 #include "libavutil/intreadwrite.h"
  47 #include "libavutil/mathematics.h"
  48
  49 static int usage(const char *argv0, int ret)
  50 {
  51     fprintf(stderr, "%s [-split] [-n basename] file1 [file2] ...\n", argv0);
  52     return ret;
  53 }
  54
  55 struct MoofOffset {
  56     int64_t time;
  57     int64_t offset;
  58     int duration;
  59 };
  60
  61 struct Track {
  62     const char *name;
  63     int64_t duration;
  64     int bitrate;
  65     int track_id;
  66     int is_audio, is_video;
  67     int width, height;
  68     int chunks;
  69     int sample_rate, channels;
  70     uint8_t *codec_private;
  71     int codec_private_size;
  72     struct MoofOffset *offsets;
  73     int timescale;
  74     const char *fourcc;
  75     int blocksize;
  76     int tag;
  77 };
  78
  79 struct Tracks {
  80     int nb_tracks;
  81     int64_t duration;
  82     struct Track **tracks;
  83     int video_track, audio_track;
  84     int nb_video_tracks, nb_audio_tracks;
  85 };
  86
  87 static int copy_tag(AVIOContext *in, AVIOContext *out, int32_t tag_name)
  88 {
  89     int32_t size, tag;
  90
  91     size = avio_rb32(in);
  92     tag  = avio_rb32(in);
  93     avio_wb32(out, size);
  94     avio_wb32(out, tag);
  95     if (tag != tag_name)
  96         return -1;
  97     size -= 8;
  98     while (size > 0) {
  99         char buf[1024];
 100         int len = FFMIN(sizeof(buf), size);
 101         if (avio_read(in, buf, len) != len)
 102             break;
 103         avio_write(out, buf, len);
 104         size -= len;
 105     }
 106     return 0;
 107 }
 108
 109 static int write_fragment(const char *filename, AVIOContext *in)
 110 {
 111     AVIOContext *out = NULL;
 112     int ret;
 113
 114     if ((ret = avio_open2(&out, filename, AVIO_FLAG_WRITE, NULL, NULL)) < 0)
 115         return ret;
 116     copy_tag(in, out, MKBETAG('m', 'o', 'o', 'f'));
 117     copy_tag(in, out, MKBETAG('m', 'd', 'a', 't'));
 118
 119     avio_flush(out);
 120     avio_close(out);
 121
 122     return ret;
 123 }
 124
 125 static int write_fragments(struct Tracks *tracks, int start_index,
 126                            AVIOContext *in)
 127 {
 128     char dirname[100], filename[500];
 129     int i, j;
 130
 131     for (i = start_index; i < tracks->nb_tracks; i++) {
 132         struct Track *track = tracks->tracks[i];
 133         const char *type    = track->is_video ? "video" : "audio";
 134         snprintf(dirname, sizeof(dirname), "QualityLevels(%d)", track->bitrate);
 135         if (mkdir(dirname, 0777) == -1)
 136             return AVERROR(errno);
 137         for (j = 0; j < track->chunks; j++) {
 138             snprintf(filename, sizeof(filename), "%s/Fragments(%s=%"PRId64")",
 139                      dirname, type, track->offsets[j].time);
 140             avio_seek(in, track->offsets[j].offset, SEEK_SET);
 141             write_fragment(filename, in);
 142         }
 143     }
 144     return 0;
 145 }
 146
 147 static int read_tfra(struct Tracks *tracks, int start_index, AVIOContext *f)
 148 {
 149     int ret = AVERROR_EOF, track_id;
 150     int version, fieldlength, i, j;
 151     int64_t pos   = avio_tell(f);
 152     uint32_t size = avio_rb32(f);
 153     struct Track *track = NULL;
 154
 155     if (avio_rb32(f) != MKBETAG('t', 'f', 'r', 'a'))
 156         goto fail;
 157     version = avio_r8(f);
 158     avio_rb24(f);
 159     track_id = avio_rb32(f); /* track id */
 160     for (i = start_index; i < tracks->nb_tracks && !track; i++)
 161         if (tracks->tracks[i]->track_id == track_id)
 162             track = tracks->tracks[i];
 163     if (!track) {
 164         /* Ok, continue parsing the next atom */
 165         ret = 0;
 166         goto fail;
 167     }
 168     fieldlength = avio_rb32(f);
 169     track->chunks  = avio_rb32(f);
 170     track->offsets = av_mallocz(sizeof(*track->offsets) * track->chunks);
 171     if (!track->offsets) {
 172         ret = AVERROR(ENOMEM);
 173         goto fail;
 174     }
 175     for (i = 0; i < track->chunks; i++) {
 176         if (version == 1) {
 177             track->offsets[i].time   = avio_rb64(f);
 178             track->offsets[i].offset = avio_rb64(f);
 179         } else {
 180             track->offsets[i].time   = avio_rb32(f);
 181             track->offsets[i].offset = avio_rb32(f);
 182         }
 183         for (j = 0; j < ((fieldlength >> 4) & 3) + 1; j++)
 184             avio_r8(f);
 185         for (j = 0; j < ((fieldlength >> 2) & 3) + 1; j++)
 186             avio_r8(f);
 187         for (j = 0; j < ((fieldlength >> 0) & 3) + 1; j++)
 188             avio_r8(f);
 189         if (i > 0)
 190             track->offsets[i - 1].duration = track->offsets[i].time -
 191                                              track->offsets[i - 1].time;
 192     }
 193     if (track->chunks > 0)
 194         track->offsets[track->chunks - 1].duration = track->duration -
 195                                                      track->offsets[track->chunks - 1].time;
 196     ret = 0;
 197
 198 fail:
 199     avio_seek(f, pos + size, SEEK_SET);
 200     return ret;
 201 }
 202
 203 static int read_mfra(struct Tracks *tracks, int start_index,
 204                      const char *file, int split)
 205 {
 206     int err = 0;
 207     AVIOContext *f = NULL;
 208     int32_t mfra_size;
 209
 210     if ((err = avio_open2(&f, file, AVIO_FLAG_READ, NULL, NULL)) < 0)
 211         goto fail;
 212     avio_seek(f, avio_size(f) - 4, SEEK_SET);
 213     mfra_size = avio_rb32(f);
 214     avio_seek(f, -mfra_size, SEEK_CUR);
 215     if (avio_rb32(f) != mfra_size) {
 216         err = AVERROR_INVALIDDATA;
 217         goto fail;
 218     }
 219     if (avio_rb32(f) != MKBETAG('m', 'f', 'r', 'a')) {
 220         err = AVERROR_INVALIDDATA;
 221         goto fail;
 222     }
 223     while (!read_tfra(tracks, start_index, f)) {
 224         /* Empty */
 225     }
 226
 227     if (split)
 228         err = write_fragments(tracks, start_index, f);
 229
 230 fail:
 231     if (f)
 232         avio_close(f);
 233     if (err)
 234         fprintf(stderr, "Unable to read the MFRA atom in %s\n", file);
 235     return err;
 236 }
 237
 238 static int get_private_data(struct Track *track, AVCodecContext *codec)
 239 {
 240     track->codec_private_size = codec->extradata_size;
 241     track->codec_private      = av_mallocz(codec->extradata_size);
 242     if (!track->codec_private)
 243         return AVERROR(ENOMEM);
 244     memcpy(track->codec_private, codec->extradata, codec->extradata_size);
 245     return 0;
 246 }
 247
 248 static int get_video_private_data(struct Track *track, AVCodecContext *codec)
 249 {
 250     AVIOContext *io = NULL;
 251     uint16_t sps_size, pps_size;
 252     int err = AVERROR(EINVAL);
 253
 254     if (codec->codec_id == AV_CODEC_ID_VC1)
 255         return get_private_data(track, codec);
 256
 257     if (avio_open_dyn_buf(&io) < 0)  {
 258         err = AVERROR(ENOMEM);
 259         goto fail;
 260     }
 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 {
 282     AVFormatContext *ctx = NULL;
 283     int err = 0, i, orig_tracks = tracks->nb_tracks;
 284     char errbuf[50], *ptr;
 285     struct Track *track;
 286
 287     err = avformat_open_input(&ctx, file, NULL, NULL);
 288     if (err < 0) {
 289         av_strerror(err, errbuf, sizeof(errbuf));
 290         fprintf(stderr, "Unable to open %s: %s\n", file, errbuf);
 291         return 1;
 292     }
 293
 294     err = avformat_find_stream_info(ctx, NULL);
 295     if (err < 0) {
 296         av_strerror(err, errbuf, sizeof(errbuf));
 297         fprintf(stderr, "Unable to identify %s: %s\n", file, errbuf);
 298         goto fail;
 299     }
 300
 301     if (ctx->nb_streams < 1) {
 302         fprintf(stderr, "No streams found in %s\n", file);
 303         goto fail;
 304     }
 305     if (!tracks->duration)
 306         tracks->duration = ctx->duration;
 307
 308     for (i = 0; i < ctx->nb_streams; i++) {
 309         struct Track **temp;
 310         AVStream *st = ctx->streams[i];
 311         track = av_mallocz(sizeof(*track));
 312         if (!track) {
 313             err = AVERROR(ENOMEM);
 314             goto fail;
 315         }
 316         temp = av_realloc(tracks->tracks,
 317                           sizeof(*tracks->tracks) * (tracks->nb_tracks + 1));
 318         if (!temp) {
 319             av_free(track);
 320             err = AVERROR(ENOMEM);
 321             goto fail;
 322         }
 323         tracks->tracks = temp;
 324         tracks->tracks[tracks->nb_tracks] = track;
 325
 326         track->name = file;
 327         if ((ptr = strrchr(file, '/')) != NULL)
 328             track->name = ptr + 1;
 329
 330         track->bitrate   = st->codec->bit_rate;
 331         track->track_id  = st->id;
 332         track->timescale = st->time_base.den;
 333         track->duration  = av_rescale_rnd(ctx->duration, track->timescale,
 334                                           AV_TIME_BASE, AV_ROUND_UP);
 335         track->is_audio  = st->codec->codec_type == AVMEDIA_TYPE_AUDIO;
 336         track->is_video  = st->codec->codec_type == AVMEDIA_TYPE_VIDEO;
 337
 338         if (!track->is_audio && !track->is_video) {
 339             fprintf(stderr,
 340                     "Track %d in %s is neither video nor audio, skipping\n",
 341                     track->track_id, file);
 342             av_freep(&tracks->tracks[tracks->nb_tracks]);
 343             continue;
 344         }
 345
 346         if (track->is_audio) {
 347             if (tracks->audio_track < 0)
 348                 tracks->audio_track = tracks->nb_tracks;
 349             tracks->nb_audio_tracks++;
 350             track->channels    = st->codec->channels;
 351             track->sample_rate = st->codec->sample_rate;
 352             if (st->codec->codec_id == AV_CODEC_ID_AAC) {
 353                 track->fourcc    = "AACL";
 354                 track->tag       = 255;
 355                 track->blocksize = 4;
 356             } else if (st->codec->codec_id == AV_CODEC_ID_WMAPRO) {
 357                 track->fourcc    = "WMAP";
 358                 track->tag       = st->codec->codec_tag;
 359                 track->blocksize = st->codec->block_align;
 360             }
 361             get_private_data(track, st->codec);
 362         }
 363         if (track->is_video) {
 364             if (tracks->video_track < 0)
 365                 tracks->video_track = tracks->nb_tracks;
 366             tracks->nb_video_tracks++;
 367             track->width  = st->codec->width;
 368             track->height = st->codec->height;
 369             if (st->codec->codec_id == AV_CODEC_ID_H264)
 370                 track->fourcc = "H264";
 371             else if (st->codec->codec_id == AV_CODEC_ID_VC1)
 372                 track->fourcc = "WVC1";
 373             get_video_private_data(track, st->codec);
 374         }
 375
 376         tracks->nb_tracks++;
 377     }
 378
 379     avformat_close_input(&ctx);
 380
 381     err = read_mfra(tracks, orig_tracks, file, split);
 382
 383 fail:
 384     if (ctx)
 385         avformat_close_input(&ctx);
 386     return err;
 387 }
 388
 389 static void output_server_manifest(struct Tracks *tracks,
 390                                    const char *basename)
 391 {
 392     char filename[1000];
 393     FILE *out;
 394     int i;
 395
 396     snprintf(filename, sizeof(filename), "%s.ism", basename);
 397     out = fopen(filename, "w");
 398     if (!out) {
 399         perror(filename);
 400         return;
 401     }
 402     fprintf(out, "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n");
 403     fprintf(out, "<smil xmlns=\"http://www.w3.org/2001/SMIL20/Language\">\n");
 404     fprintf(out, "\t<head>\n");
 405     fprintf(out, "\t\t<meta name=\"clientManifestRelativePath\" "
 406                  "content=\"%s.ismc\" />\n", basename);
 407     fprintf(out, "\t</head>\n");
 408     fprintf(out, "\t<body>\n");
 409     fprintf(out, "\t\t<switch>\n");
 410     for (i = 0; i < tracks->nb_tracks; i++) {
 411         struct Track *track = tracks->tracks[i];
 412         const char *type    = track->is_video ? "video" : "audio";
 413         fprintf(out, "\t\t\t<%s src=\"%s\" systemBitrate=\"%d\">\n",
 414                 type, track->name, track->bitrate);
 415         fprintf(out, "\t\t\t\t<param name=\"trackID\" value=\"%d\" "
 416                      "valueType=\"data\" />\n", track->track_id);
 417         fprintf(out, "\t\t\t</%s>\n", type);
 418     }
 419     fprintf(out, "\t\t</switch>\n");
 420     fprintf(out, "\t</body>\n");
 421     fprintf(out, "</smil>\n");
 422     fclose(out);
 423 }
 424
 425 static void print_track_chunks(FILE *out, struct Tracks *tracks, int main,
 426                                const char *type)
 427 {
 428     int i, j;
 429     struct Track *track = tracks->tracks[main];
 430     for (i = 0; i < track->chunks; i++) {
 431         for (j = main + 1; j < tracks->nb_tracks; j++) {
 432             if (tracks->tracks[j]->is_audio == track->is_audio &&
 433                 track->offsets[i].duration != tracks->tracks[j]->offsets[i].duration)
 434                 fprintf(stderr, "Mismatched duration of %s chunk %d in %s and %s\n",
 435                         type, i, track->name, tracks->tracks[j]->name);
 436         }
 437         fprintf(out, "\t\t<c n=\"%d\" d=\"%d\" />\n",
 438                 i, track->offsets[i].duration);
 439     }
 440 }
 441
 442 static void output_client_manifest(struct Tracks *tracks,
 443                                    const char *basename, int split)
 444 {
 445     char filename[1000];
 446     FILE *out;
 447     int i, j;
 448
 449     if (split)
 450         snprintf(filename, sizeof(filename), "Manifest");
 451     else
 452         snprintf(filename, sizeof(filename), "%s.ismc", basename);
 453     out = fopen(filename, "w");
 454     if (!out) {
 455         perror(filename);
 456         return;
 457     }
 458     fprintf(out, "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n");
 459     fprintf(out, "<SmoothStreamingMedia MajorVersion=\"2\" MinorVersion=\"0\" "
 460                  "Duration=\"%"PRId64 "\">\n", tracks->duration * 10);
 461     if (tracks->video_track >= 0) {
 462         struct Track *track = tracks->tracks[tracks->video_track];
 463         struct Track *first_track = track;
 464         int index = 0;
 465         fprintf(out,
 466                 "\t<StreamIndex Type=\"video\" QualityLevels=\"%d\" "
 467                 "Chunks=\"%d\" "
 468                 "Url=\"QualityLevels({bitrate})/Fragments(video={start time})\">\n",
 469                 tracks->nb_video_tracks, track->chunks);
 470         for (i = 0; i < tracks->nb_tracks; i++) {
 471             track = tracks->tracks[i];
 472             if (!track->is_video)
 473                 continue;
 474             fprintf(out,
 475                     "\t\t<QualityLevel Index=\"%d\" Bitrate=\"%d\" "
 476                     "FourCC=\"%s\" MaxWidth=\"%d\" MaxHeight=\"%d\" "
 477                     "CodecPrivateData=\"",
 478                     index, track->bitrate, track->fourcc, track->width, track->height);
 479             for (j = 0; j < track->codec_private_size; j++)
 480                 fprintf(out, "%02X", track->codec_private[j]);
 481             fprintf(out, "\" />\n");
 482             index++;
 483             if (track->chunks != first_track->chunks)
 484                 fprintf(stderr, "Mismatched number of video chunks in %s and %s\n",
 485                         track->name, first_track->name);
 486         }
 487         print_track_chunks(out, tracks, tracks->video_track, "video");
 488         fprintf(out, "\t</StreamIndex>\n");
 489     }
 490     if (tracks->audio_track >= 0) {
 491         struct Track *track = tracks->tracks[tracks->audio_track];
 492         struct Track *first_track = track;
 493         int index = 0;
 494         fprintf(out,
 495                 "\t<StreamIndex Type=\"audio\" QualityLevels=\"%d\" "
 496                 "Chunks=\"%d\" "
 497                 "Url=\"QualityLevels({bitrate})/Fragments(audio={start time})\">\n",
 498                 tracks->nb_audio_tracks, track->chunks);
 499         for (i = 0; i < tracks->nb_tracks; i++) {
 500             track = tracks->tracks[i];
 501             if (!track->is_audio)
 502                 continue;
 503             fprintf(out,
 504                     "\t\t<QualityLevel Index=\"%d\" Bitrate=\"%d\" "
 505                     "FourCC=\"%s\" SamplingRate=\"%d\" Channels=\"%d\" "
 506                     "BitsPerSample=\"16\" PacketSize=\"%d\" "
 507                     "AudioTag=\"%d\" CodecPrivateData=\"",
 508                     index, track->bitrate, track->fourcc, track->sample_rate,
 509                     track->channels, track->blocksize, track->tag);
 510             for (j = 0; j < track->codec_private_size; j++)
 511                 fprintf(out, "%02X", track->codec_private[j]);
 512             fprintf(out, "\" />\n");
 513             index++;
 514             if (track->chunks != first_track->chunks)
 515                 fprintf(stderr, "Mismatched number of audio chunks in %s and %s\n",
 516                         track->name, first_track->name);
 517         }
 518         print_track_chunks(out, tracks, tracks->audio_track, "audio");
 519         fprintf(out, "\t</StreamIndex>\n");
 520     }
 521     fprintf(out, "</SmoothStreamingMedia>\n");
 522     fclose(out);
 523 }
 524
 525 static void clean_tracks(struct Tracks *tracks)
 526 {
 527     int i;
 528     for (i = 0; i < tracks->nb_tracks; i++) {
 529         av_freep(&tracks->tracks[i]->codec_private);
 530         av_freep(&tracks->tracks[i]->offsets);
 531         av_freep(&tracks->tracks[i]);
 532     }
 533     av_freep(&tracks->tracks);
 534     tracks->nb_tracks = 0;
 535 }
 536
 537 int main(int argc, char **argv)
 538 {
 539     const char *basename = NULL;
 540     int split = 0, i;
 541     struct Tracks tracks = { 0, .video_track = -1, .audio_track = -1 };
 542
 543     av_register_all();
 544
 545     for (i = 1; i < argc; i++) {
 546         if (!strcmp(argv[i], "-n")) {
 547             basename = argv[i + 1];
 548             i++;
 549         } else if (!strcmp(argv[i], "-split")) {
 550             split = 1;
 551         } else if (argv[i][0] == '-') {
 552             return usage(argv[0], 1);
 553         } else {
 554             if (handle_file(&tracks, argv[i], split))
 555                 return 1;
 556         }
 557     }
 558     if (!tracks.nb_tracks || (!basename && !split))
 559         return usage(argv[0], 1);
 560
 561     if (!split)
 562         output_server_manifest(&tracks, basename);
 563     output_client_manifest(&tracks, basename, split);
 564
 565     clean_tracks(&tracks);
 566
 567     return 0;
 568 }