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 #include <sys/stat.h>
  38 #ifdef _WIN32
  39 #include <direct.h>
  40 #define mkdir(a, b) _mkdir(a)
  41 #endif
  42
  43 #include "libavformat/avformat.h"
  44 #include "libavutil/intreadwrite.h"
  45 #include "libavutil/mathematics.h"
  46
  47 static int usage(const char *argv0, int ret)
  48 {
  49     fprintf(stderr, "%s [-split] [-n basename] file1 [file2] ...\n", argv0);
  50     return ret;
  51 }
  52
  53 struct MoofOffset {
  54     int64_t time;
  55     int64_t offset;
  56     int duration;
  57 };
  58
  59 struct Track {
  60     const char *name;
  61     int64_t duration;
  62     int bitrate;
  63     int track_id;
  64     int is_audio, is_video;
  65     int width, height;
  66     int chunks;
  67     int sample_rate, channels;
  68     uint8_t *codec_private;
  69     int codec_private_size;
  70     struct MoofOffset *offsets;
  71     int timescale;
  72     const char *fourcc;
  73     int blocksize;
  74     int tag;
  75 };
  76
  77 struct Tracks {
  78     int nb_tracks;
  79     int64_t duration;
  80     struct Track **tracks;
  81     int video_track, audio_track;
  82     int nb_video_tracks, nb_audio_tracks;
  83 };
  84
  85 static int copy_tag(AVIOContext *in, AVIOContext *out, int32_t tag_name)
  86 {
  87     int32_t size, tag;
  88
  89     size = avio_rb32(in);
  90     tag  = avio_rb32(in);
  91     avio_wb32(out, size);
  92     avio_wb32(out, tag);
  93     if (tag != tag_name)
  94         return -1;
  95     size -= 8;
  96     while (size > 0) {
  97         char buf[1024];
  98         int len = FFMIN(sizeof(buf), size);
  99         if (avio_read(in, buf, len) != len)
 100             break;
 101         avio_write(out, buf, len);
 102         size -= len;
 103     }
 104     return 0;
 105 }
 106
 107 static int write_fragment(const char *filename, AVIOContext *in)
 108 {
 109     AVIOContext *out = NULL;
 110     int ret;
 111
 112     if ((ret = avio_open2(&out, filename, AVIO_FLAG_WRITE, NULL, NULL)) < 0)
 113         return ret;
 114     copy_tag(in, out, MKBETAG('m', 'o', 'o', 'f'));
 115     copy_tag(in, out, MKBETAG('m', 'd', 'a', 't'));
 116
 117     avio_flush(out);
 118     avio_close(out);
 119
 120     return ret;
 121 }
 122
 123 static int write_fragments(struct Tracks *tracks, int start_index,
 124                            AVIOContext *in)
 125 {
 126     char dirname[100], filename[500];
 127     int i, j;
 128
 129     for (i = start_index; i < tracks->nb_tracks; i++) {
 130         struct Track *track = tracks->tracks[i];
 131         const char *type    = track->is_video ? "video" : "audio";
 132         snprintf(dirname, sizeof(dirname), "QualityLevels(%d)", track->bitrate);
 133         mkdir(dirname, 0777);
 134         for (j = 0; j < track->chunks; j++) {
 135             snprintf(filename, sizeof(filename), "%s/Fragments(%s=%"PRId64")",
 136                      dirname, type, track->offsets[j].time);
 137             avio_seek(in, track->offsets[j].offset, SEEK_SET);
 138             write_fragment(filename, in);
 139         }
 140     }
 141     return 0;
 142 }
 143
 144 static int read_tfra(struct Tracks *tracks, int start_index, AVIOContext *f)
 145 {
 146     int ret = AVERROR_EOF, track_id;
 147     int version, fieldlength, i, j;
 148     int64_t pos   = avio_tell(f);
 149     uint32_t size = avio_rb32(f);
 150     struct Track *track = NULL;
 151
 152     if (avio_rb32(f) != MKBETAG('t', 'f', 'r', 'a'))
 153         goto fail;
 154     version = avio_r8(f);
 155     avio_rb24(f);
 156     track_id = avio_rb32(f); /* track id */
 157     for (i = start_index; i < tracks->nb_tracks && !track; i++)
 158         if (tracks->tracks[i]->track_id == track_id)
 159             track = tracks->tracks[i];
 160     if (!track) {
 161         /* Ok, continue parsing the next atom */
 162         ret = 0;
 163         goto fail;
 164     }
 165     fieldlength = avio_rb32(f);
 166     track->chunks  = avio_rb32(f);
 167     track->offsets = av_mallocz(sizeof(*track->offsets) * track->chunks);
 168     if (!track->offsets) {
 169         ret = AVERROR(ENOMEM);
 170         goto fail;
 171     }
 172     for (i = 0; i < track->chunks; i++) {
 173         if (version == 1) {
 174             track->offsets[i].time   = avio_rb64(f);
 175             track->offsets[i].offset = avio_rb64(f);
 176         } else {
 177             track->offsets[i].time   = avio_rb32(f);
 178             track->offsets[i].offset = avio_rb32(f);
 179         }
 180         for (j = 0; j < ((fieldlength >> 4) & 3) + 1; j++)
 181             avio_r8(f);
 182         for (j = 0; j < ((fieldlength >> 2) & 3) + 1; j++)
 183             avio_r8(f);
 184         for (j = 0; j < ((fieldlength >> 0) & 3) + 1; j++)
 185             avio_r8(f);
 186         if (i > 0)
 187             track->offsets[i - 1].duration = track->offsets[i].time -
 188                                              track->offsets[i - 1].time;
 189     }
 190     if (track->chunks > 0)
 191         track->offsets[track->chunks - 1].duration = track->duration -
 192                                                      track->offsets[track->chunks - 1].time;
 193     ret = 0;
 194
 195 fail:
 196     avio_seek(f, pos + size, SEEK_SET);
 197     return ret;
 198 }
 199
 200 static int read_mfra(struct Tracks *tracks, int start_index,
 201                      const char *file, int split)
 202 {
 203     int err = 0;
 204     AVIOContext *f = NULL;
 205     int32_t mfra_size;
 206
 207     if ((err = avio_open2(&f, file, AVIO_FLAG_READ, NULL, NULL)) < 0)
 208         goto fail;
 209     avio_seek(f, avio_size(f) - 4, SEEK_SET);
 210     mfra_size = avio_rb32(f);
 211     avio_seek(f, -mfra_size, SEEK_CUR);
 212     if (avio_rb32(f) != mfra_size) {
 213         err = AVERROR_INVALIDDATA;
 214         goto fail;
 215     }
 216     if (avio_rb32(f) != MKBETAG('m', 'f', 'r', 'a')) {
 217         err = AVERROR_INVALIDDATA;
 218         goto fail;
 219     }
 220     while (!read_tfra(tracks, start_index, f)) {
 221         /* Empty */
 222     }
 223
 224     if (split)
 225         write_fragments(tracks, start_index, f);
 226
 227 fail:
 228     if (f)
 229         avio_close(f);
 230     if (err)
 231         fprintf(stderr, "Unable to read the MFRA atom in %s\n", file);
 232     return err;
 233 }
 234
 235 static int get_private_data(struct Track *track, AVCodecContext *codec)
 236 {
 237     track->codec_private_size = codec->extradata_size;
 238     track->codec_private      = av_mallocz(codec->extradata_size);
 239     if (!track->codec_private)
 240         return AVERROR(ENOMEM);
 241     memcpy(track->codec_private, codec->extradata, codec->extradata_size);
 242     return 0;
 243 }
 244
 245 static int get_video_private_data(struct Track *track, AVCodecContext *codec)
 246 {
 247     AVIOContext *io = NULL;
 248     uint16_t sps_size, pps_size;
 249     int err = AVERROR(EINVAL);
 250
 251     if (codec->codec_id == AV_CODEC_ID_VC1)
 252         return get_private_data(track, codec);
 253
 254     avio_open_dyn_buf(&io);
 255     if (codec->extradata_size < 11 || codec->extradata[0] != 1)
 256         goto fail;
 257     sps_size = AV_RB16(&codec->extradata[6]);
 258     if (11 + sps_size > codec->extradata_size)
 259         goto fail;
 260     avio_wb32(io, 0x00000001);
 261     avio_write(io, &codec->extradata[8], sps_size);
 262     pps_size = AV_RB16(&codec->extradata[9 + sps_size]);
 263     if (11 + sps_size + pps_size > codec->extradata_size)
 264         goto fail;
 265     avio_wb32(io, 0x00000001);
 266     avio_write(io, &codec->extradata[11 + sps_size], pps_size);
 267     err = 0;
 268
 269 fail:
 270     track->codec_private_size = avio_close_dyn_buf(io, &track->codec_private);
 271     return err;
 272 }
 273
 274 static int handle_file(struct Tracks *tracks, const char *file, int split)
 275 {
 276     AVFormatContext *ctx = NULL;
 277     int err = 0, i, orig_tracks = tracks->nb_tracks;
 278     char errbuf[50], *ptr;
 279     struct Track *track;
 280
 281     err = avformat_open_input(&ctx, file, NULL, NULL);
 282     if (err < 0) {
 283         av_strerror(err, errbuf, sizeof(errbuf));
 284         fprintf(stderr, "Unable to open %s: %s\n", file, errbuf);
 285         return 1;
 286     }
 287
 288     err = avformat_find_stream_info(ctx, NULL);
 289     if (err < 0) {
 290         av_strerror(err, errbuf, sizeof(errbuf));
 291         fprintf(stderr, "Unable to identify %s: %s\n", file, errbuf);
 292         goto fail;
 293     }
 294
 295     if (ctx->nb_streams < 1) {
 296         fprintf(stderr, "No streams found in %s\n", file);
 297         goto fail;
 298     }
 299     if (!tracks->duration)
 300         tracks->duration = ctx->duration;
 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  = av_rescale_rnd(ctx->duration, track->timescale,
 328                                           AV_TIME_BASE, AV_ROUND_UP);
 329         track->is_audio  = st->codec->codec_type == AVMEDIA_TYPE_AUDIO;
 330         track->is_video  = st->codec->codec_type == AVMEDIA_TYPE_VIDEO;
 331
 332         if (!track->is_audio && !track->is_video) {
 333             fprintf(stderr,
 334                     "Track %d in %s is neither video nor audio, skipping\n",
 335                     track->track_id, file);
 336             av_freep(&tracks->tracks[tracks->nb_tracks]);
 337             continue;
 338         }
 339
 340         if (track->is_audio) {
 341             if (tracks->audio_track < 0)
 342                 tracks->audio_track = tracks->nb_tracks;
 343             tracks->nb_audio_tracks++;
 344             track->channels    = st->codec->channels;
 345             track->sample_rate = st->codec->sample_rate;
 346             if (st->codec->codec_id == AV_CODEC_ID_AAC) {
 347                 track->fourcc    = "AACL";
 348                 track->tag       = 255;
 349                 track->blocksize = 4;
 350             } else if (st->codec->codec_id == AV_CODEC_ID_WMAPRO) {
 351                 track->fourcc    = "WMAP";
 352                 track->tag       = st->codec->codec_tag;
 353                 track->blocksize = st->codec->block_align;
 354             }
 355             get_private_data(track, st->codec);
 356         }
 357         if (track->is_video) {
 358             if (tracks->video_track < 0)
 359                 tracks->video_track = tracks->nb_tracks;
 360             tracks->nb_video_tracks++;
 361             track->width  = st->codec->width;
 362             track->height = st->codec->height;
 363             if (st->codec->codec_id == AV_CODEC_ID_H264)
 364                 track->fourcc = "H264";
 365             else if (st->codec->codec_id == AV_CODEC_ID_VC1)
 366                 track->fourcc = "WVC1";
 367             get_video_private_data(track, st->codec);
 368         }
 369
 370         tracks->nb_tracks++;
 371     }
 372
 373     avformat_close_input(&ctx);
 374
 375     err = read_mfra(tracks, orig_tracks, file, split);
 376
 377 fail:
 378     if (ctx)
 379         avformat_close_input(&ctx);
 380     return err;
 381 }
 382
 383 static void output_server_manifest(struct Tracks *tracks,
 384                                    const char *basename)
 385 {
 386     char filename[1000];
 387     FILE *out;
 388     int i;
 389
 390     snprintf(filename, sizeof(filename), "%s.ism", basename);
 391     out = fopen(filename, "w");
 392     if (!out) {
 393         perror(filename);
 394         return;
 395     }
 396     fprintf(out, "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n");
 397     fprintf(out, "<smil xmlns=\"http://www.w3.org/2001/SMIL20/Language\">\n");
 398     fprintf(out, "\t<head>\n");
 399     fprintf(out, "\t\t<meta name=\"clientManifestRelativePath\" "
 400                  "content=\"%s.ismc\" />\n", basename);
 401     fprintf(out, "\t</head>\n");
 402     fprintf(out, "\t<body>\n");
 403     fprintf(out, "\t\t<switch>\n");
 404     for (i = 0; i < tracks->nb_tracks; i++) {
 405         struct Track *track = tracks->tracks[i];
 406         const char *type    = track->is_video ? "video" : "audio";
 407         fprintf(out, "\t\t\t<%s src=\"%s\" systemBitrate=\"%d\">\n",
 408                 type, track->name, track->bitrate);
 409         fprintf(out, "\t\t\t\t<param name=\"trackID\" value=\"%d\" "
 410                      "valueType=\"data\" />\n", track->track_id);
 411         fprintf(out, "\t\t\t</%s>\n", type);
 412     }
 413     fprintf(out, "\t\t</switch>\n");
 414     fprintf(out, "\t</body>\n");
 415     fprintf(out, "</smil>\n");
 416     fclose(out);
 417 }
 418
 419 static void print_track_chunks(FILE *out, struct Tracks *tracks, int main,
 420                                const char *type)
 421 {
 422     int i, j;
 423     struct Track *track = tracks->tracks[main];
 424     for (i = 0; i < track->chunks; i++) {
 425         for (j = main + 1; j < tracks->nb_tracks; j++) {
 426             if (tracks->tracks[j]->is_audio == track->is_audio &&
 427                 track->offsets[i].duration != tracks->tracks[j]->offsets[i].duration)
 428                 fprintf(stderr, "Mismatched duration of %s chunk %d in %s and %s\n",
 429                         type, i, track->name, tracks->tracks[j]->name);
 430         }
 431         fprintf(out, "\t\t<c n=\"%d\" d=\"%d\" />\n",
 432                 i, track->offsets[i].duration);
 433     }
 434 }
 435
 436 static void output_client_manifest(struct Tracks *tracks,
 437                                    const char *basename, int split)
 438 {
 439     char filename[1000];
 440     FILE *out;
 441     int i, j;
 442
 443     if (split)
 444         snprintf(filename, sizeof(filename), "Manifest");
 445     else
 446         snprintf(filename, sizeof(filename), "%s.ismc", basename);
 447     out = fopen(filename, "w");
 448     if (!out) {
 449         perror(filename);
 450         return;
 451     }
 452     fprintf(out, "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n");
 453     fprintf(out, "<SmoothStreamingMedia MajorVersion=\"2\" MinorVersion=\"0\" "
 454                  "Duration=\"%"PRId64 "\">\n", tracks->duration * 10);
 455     if (tracks->video_track >= 0) {
 456         struct Track *track = tracks->tracks[tracks->video_track];
 457         struct Track *first_track = track;
 458         int index = 0;
 459         fprintf(out,
 460                 "\t<StreamIndex Type=\"video\" QualityLevels=\"%d\" "
 461                 "Chunks=\"%d\" "
 462                 "Url=\"QualityLevels({bitrate})/Fragments(video={start time})\">\n",
 463                 tracks->nb_video_tracks, track->chunks);
 464         for (i = 0; i < tracks->nb_tracks; i++) {
 465             track = tracks->tracks[i];
 466             if (!track->is_video)
 467                 continue;
 468             fprintf(out,
 469                     "\t\t<QualityLevel Index=\"%d\" Bitrate=\"%d\" "
 470                     "FourCC=\"%s\" MaxWidth=\"%d\" MaxHeight=\"%d\" "
 471                     "CodecPrivateData=\"",
 472                     index, track->bitrate, track->fourcc, track->width, track->height);
 473             for (j = 0; j < track->codec_private_size; j++)
 474                 fprintf(out, "%02X", track->codec_private[j]);
 475             fprintf(out, "\" />\n");
 476             index++;
 477             if (track->chunks != first_track->chunks)
 478                 fprintf(stderr, "Mismatched number of video chunks in %s and %s\n",
 479                         track->name, first_track->name);
 480         }
 481         print_track_chunks(out, tracks, tracks->video_track, "video");
 482         fprintf(out, "\t</StreamIndex>\n");
 483     }
 484     if (tracks->audio_track >= 0) {
 485         struct Track *track = tracks->tracks[tracks->audio_track];
 486         struct Track *first_track = track;
 487         int index = 0;
 488         fprintf(out,
 489                 "\t<StreamIndex Type=\"audio\" QualityLevels=\"%d\" "
 490                 "Chunks=\"%d\" "
 491                 "Url=\"QualityLevels({bitrate})/Fragments(audio={start time})\">\n",
 492                 tracks->nb_audio_tracks, track->chunks);
 493         for (i = 0; i < tracks->nb_tracks; i++) {
 494             track = tracks->tracks[i];
 495             if (!track->is_audio)
 496                 continue;
 497             fprintf(out,
 498                     "\t\t<QualityLevel Index=\"%d\" Bitrate=\"%d\" "
 499                     "FourCC=\"%s\" SamplingRate=\"%d\" Channels=\"%d\" "
 500                     "BitsPerSample=\"16\" PacketSize=\"%d\" "
 501                     "AudioTag=\"%d\" CodecPrivateData=\"",
 502                     index, track->bitrate, track->fourcc, track->sample_rate,
 503                     track->channels, track->blocksize, track->tag);
 504             for (j = 0; j < track->codec_private_size; j++)
 505                 fprintf(out, "%02X", track->codec_private[j]);
 506             fprintf(out, "\" />\n");
 507             index++;
 508             if (track->chunks != first_track->chunks)
 509                 fprintf(stderr, "Mismatched number of audio chunks in %s and %s\n",
 510                         track->name, first_track->name);
 511         }
 512         print_track_chunks(out, tracks, tracks->audio_track, "audio");
 513         fprintf(out, "\t</StreamIndex>\n");
 514     }
 515     fprintf(out, "</SmoothStreamingMedia>\n");
 516     fclose(out);
 517 }
 518
 519 static void clean_tracks(struct Tracks *tracks)
 520 {
 521     int i;
 522     for (i = 0; i < tracks->nb_tracks; i++) {
 523         av_freep(&tracks->tracks[i]->codec_private);
 524         av_freep(&tracks->tracks[i]->offsets);
 525         av_freep(&tracks->tracks[i]);
 526     }
 527     av_freep(&tracks->tracks);
 528     tracks->nb_tracks = 0;
 529 }
 530
 531 int main(int argc, char **argv)
 532 {
 533     const char *basename = NULL;
 534     int split = 0, i;
 535     struct Tracks tracks = { 0, .video_track = -1, .audio_track = -1 };
 536
 537     av_register_all();
 538
 539     for (i = 1; i < argc; i++) {
 540         if (!strcmp(argv[i], "-n")) {
 541             basename = argv[i + 1];
 542             i++;
 543         } else if (!strcmp(argv[i], "-split")) {
 544             split = 1;
 545         } else if (argv[i][0] == '-') {
 546             return usage(argv[0], 1);
 547         } else {
 548             if (handle_file(&tracks, argv[i], split))
 549                 return 1;
 550         }
 551     }
 552     if (!tracks.nb_tracks || (!basename && !split))
 553         return usage(argv[0], 1);
 554
 555     if (!split)
 556         output_server_manifest(&tracks, basename);
 557     output_client_manifest(&tracks, basename, split);
 558
 559     clean_tracks(&tracks);
 560
 561     return 0;
 562 }