FFmpeg: tools/ismindex.c Source File

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ismindex.c

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1 /*

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 */

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 */

35 #include <stdio.h>

36 #include <string.h>

38 #include "cmdutils.h"

40 #include "libavformat/avformat.h"

41 #include "libavformat/os_support.h"

42 #include "libavutil/intreadwrite.h"

43 #include "libavutil/mathematics.h"

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 }

51 struct MoofOffset {

52 int64_t time;

53 int64_t offset;

54 int64_t duration;

55 };

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 };

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 };

83 static int copy_tag(AVIOContext *in, AVIOContext *out, int32_t tag_name)

84 {

85 int32_t size, tag;

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 }

Generated on Sun Mar 23 2014 23:50:16 for FFmpeg by doxygen 1.8.2