FFmpeg: libavformat/asfenc.c Source File

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libavformat

asfenc.c

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1 /*

2 * ASF muxer

4 *

5 * This file is part of FFmpeg.

6 *

7 * FFmpeg is free software; you can redistribute it and/or

8 * modify it under the terms of the GNU Lesser General Public

9 * License as published by the Free Software Foundation; either

10 * version 2.1 of the License, or (at your option) any later version.

11 *

12 * FFmpeg is distributed in the hope that it will be useful,

13 * but WITHOUT ANY WARRANTY; without even the implied warranty of

14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU

15 * Lesser General Public License for more details.

16 *

17 * You should have received a copy of the GNU Lesser General Public

18 * License along with FFmpeg; if not, write to the Free Software

19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

20 */

22 #include "libavutil/avassert.h"

23 #include "libavutil/dict.h"

24 #include "libavutil/mathematics.h"

25 #include "avformat.h"

26 #include "avio_internal.h"

27 #include "internal.h"

28 #include "riff.h"

29 #include "asf.h"

31 #define ASF_INDEXED_INTERVAL 10000000

32 #define ASF_INDEX_BLOCK (1<<9)

33 #define ASF_PAYLOADS_PER_PACKET 63

35 #define ASF_PACKET_ERROR_CORRECTION_DATA_SIZE 0x2

36 #define ASF_PACKET_ERROR_CORRECTION_FLAGS \

37 (ASF_PACKET_FLAG_ERROR_CORRECTION_PRESENT | \

38 ASF_PACKET_ERROR_CORRECTION_DATA_SIZE)

40 #if (ASF_PACKET_ERROR_CORRECTION_FLAGS != 0)

41 # define ASF_PACKET_ERROR_CORRECTION_FLAGS_FIELD_SIZE 1

42 #else

43 # define ASF_PACKET_ERROR_CORRECTION_FLAGS_FIELD_SIZE 0

44 #endif

46 #define ASF_PPI_PROPERTY_FLAGS \

47 (ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_BYTE | \

48 ASF_PL_FLAG_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_IS_DWORD | \

49 ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_BYTE | \

50 ASF_PL_FLAG_STREAM_NUMBER_LENGTH_FIELD_IS_BYTE)

52 #define ASF_PPI_LENGTH_TYPE_FLAGS 0

54 #define ASF_PAYLOAD_FLAGS ASF_PL_FLAG_PAYLOAD_LENGTH_FIELD_IS_WORD

56 #if (ASF_PPI_FLAG_SEQUENCE_FIELD_IS_BYTE == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_SEQUENCE_FIELD_SIZE))

57 # define ASF_PPI_SEQUENCE_FIELD_SIZE 1

58 #endif

59 #if (ASF_PPI_FLAG_SEQUENCE_FIELD_IS_WORD == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_SEQUENCE_FIELD_SIZE))

60 # define ASF_PPI_SEQUENCE_FIELD_SIZE 2

61 #endif

62 #if (ASF_PPI_FLAG_SEQUENCE_FIELD_IS_DWORD == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_SEQUENCE_FIELD_SIZE))

63 # define ASF_PPI_SEQUENCE_FIELD_SIZE 4

64 #endif

65 #ifndef ASF_PPI_SEQUENCE_FIELD_SIZE

66 # define ASF_PPI_SEQUENCE_FIELD_SIZE 0

67 #endif

69 #if (ASF_PPI_FLAG_PACKET_LENGTH_FIELD_IS_BYTE == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_PACKET_LENGTH_FIELD_SIZE))

70 # define ASF_PPI_PACKET_LENGTH_FIELD_SIZE 1

71 #endif

72 #if (ASF_PPI_FLAG_PACKET_LENGTH_FIELD_IS_WORD == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_PACKET_LENGTH_FIELD_SIZE))

73 # define ASF_PPI_PACKET_LENGTH_FIELD_SIZE 2

74 #endif

75 #if (ASF_PPI_FLAG_PACKET_LENGTH_FIELD_IS_DWORD == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_PACKET_LENGTH_FIELD_SIZE))

76 # define ASF_PPI_PACKET_LENGTH_FIELD_SIZE 4

77 #endif

78 #ifndef ASF_PPI_PACKET_LENGTH_FIELD_SIZE

79 # define ASF_PPI_PACKET_LENGTH_FIELD_SIZE 0

80 #endif

82 #if (ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_BYTE == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_PADDING_LENGTH_FIELD_SIZE))

83 # define ASF_PPI_PADDING_LENGTH_FIELD_SIZE 1

84 #endif

85 #if (ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_WORD == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_PADDING_LENGTH_FIELD_SIZE))

86 # define ASF_PPI_PADDING_LENGTH_FIELD_SIZE 2

87 #endif

88 #if (ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_DWORD == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_PADDING_LENGTH_FIELD_SIZE))

89 # define ASF_PPI_PADDING_LENGTH_FIELD_SIZE 4

90 #endif

91 #ifndef ASF_PPI_PADDING_LENGTH_FIELD_SIZE

92 # define ASF_PPI_PADDING_LENGTH_FIELD_SIZE 0

93 #endif

95 #if (ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_BYTE == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_REPLICATED_DATA_LENGTH_FIELD_SIZE))

96 # define ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE 1

97 #endif

98 #if (ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_WORD == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_REPLICATED_DATA_LENGTH_FIELD_SIZE))

99 # define ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE 2

100 #endif

101 #if (ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_DWORD == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_REPLICATED_DATA_LENGTH_FIELD_SIZE))

102 # define ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE 4

103 #endif

104 #ifndef ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE

105 # define ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE 0

106 #endif

107

108 #if (ASF_PL_FLAG_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_IS_BYTE == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_SIZE))

109 # define ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE 1

110 #endif

111 #if (ASF_PL_FLAG_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_IS_WORD == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_SIZE))

112 # define ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE 2

113 #endif

114 #if (ASF_PL_FLAG_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_IS_DWORD == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_SIZE))

115 # define ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE 4

116 #endif

117 #ifndef ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE

118 # define ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE 0

119 #endif

120

121 #if (ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_BYTE == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_SIZE))

122 # define ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE 1

123 #endif

124 #if (ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_WORD == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_SIZE))

125 # define ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE 2

126 #endif

127 #if (ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_DWORD == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_SIZE))

128 # define ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE 4

129 #endif

130 #ifndef ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE

131 # define ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE 0

132 #endif

133

134 #if (ASF_PL_FLAG_PAYLOAD_LENGTH_FIELD_IS_BYTE == (ASF_PAYLOAD_FLAGS & ASF_PL_MASK_PAYLOAD_LENGTH_FIELD_SIZE))

135 # define ASF_PAYLOAD_LENGTH_FIELD_SIZE 1

136 #endif

137 #if (ASF_PL_FLAG_PAYLOAD_LENGTH_FIELD_IS_WORD == (ASF_PAYLOAD_FLAGS & ASF_PL_MASK_PAYLOAD_LENGTH_FIELD_SIZE))

138 # define ASF_PAYLOAD_LENGTH_FIELD_SIZE 2

139 #endif

140 #ifndef ASF_PAYLOAD_LENGTH_FIELD_SIZE

141 # define ASF_PAYLOAD_LENGTH_FIELD_SIZE 0

142 #endif

143

144 #define PACKET_HEADER_MIN_SIZE \

145 (ASF_PACKET_ERROR_CORRECTION_FLAGS_FIELD_SIZE + \

146 ASF_PACKET_ERROR_CORRECTION_DATA_SIZE + \

147 1 + /* Length Type Flags */ \

148 1 + /* Property Flags */ \

149 ASF_PPI_PACKET_LENGTH_FIELD_SIZE + \

150 ASF_PPI_SEQUENCE_FIELD_SIZE + \

151 ASF_PPI_PADDING_LENGTH_FIELD_SIZE + \

152 4 + /* Send Time Field */ \

153 2) /* Duration Field */

154

155 // Replicated Data shall be at least 8 bytes long.

156 #define ASF_PAYLOAD_REPLICATED_DATA_LENGTH 0x08

157

158 #define PAYLOAD_HEADER_SIZE_SINGLE_PAYLOAD \

159 (1 + /* Stream Number */ \

160 ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE + \

161 ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE + \

162 ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE + \

163 ASF_PAYLOAD_REPLICATED_DATA_LENGTH)

164

165 #define PAYLOAD_HEADER_SIZE_MULTIPLE_PAYLOADS \

166 (1 + /* Stream Number */ \

167 ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE + \

168 ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE + \

169 ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE + \

170 ASF_PAYLOAD_REPLICATED_DATA_LENGTH + \

171 ASF_PAYLOAD_LENGTH_FIELD_SIZE)

172

173 #define SINGLE_PAYLOAD_DATA_LENGTH \

174 (PACKET_SIZE - \

175 PACKET_HEADER_MIN_SIZE - \

176 PAYLOAD_HEADER_SIZE_SINGLE_PAYLOAD)

177

178 #define MULTI_PAYLOAD_CONSTANT \

179 (PACKET_SIZE - \

180 PACKET_HEADER_MIN_SIZE - \

181 1 - /* Payload Flags */ \

182 2 * PAYLOAD_HEADER_SIZE_MULTIPLE_PAYLOADS)

183

184 #define DATA_HEADER_SIZE 50

185

186 typedef struct ASFContext {

187 uint32_t seqno;

188 int is_streamed;

189 ASFStream streams[128]; ///< it's max number and it's not that big

190 /* non streamed additonnal info */

191 uint64_t nb_packets; ///< how many packets are there in the file, invalid if broadcasting

192 int64_t duration; ///< in 100ns units

193 /* packet filling */

194 unsigned char multi_payloads_present;

195 int packet_size_left;

196 int64_t packet_timestamp_start;

197 int64_t packet_timestamp_end;

198 unsigned int packet_nb_payloads;

199 uint8_t packet_buf[PACKET_SIZE];

200 AVIOContext pb;

201 /* only for reading */

202 uint64_t data_offset; ///< beginning of the first data packet

203

204 ASFIndex *index_ptr;

205 uint32_t nb_index_memory_alloc;

206 uint16_t maximum_packet;

207 uint32_t next_packet_number;

208 uint16_t next_packet_count;

209 uint64_t next_packet_offset;

210 int next_start_sec;

211 int end_sec;

212 } ASFContext;

213

214 static const AVCodecTag codec_asf_bmp_tags[] = {

215 { AV_CODEC_ID_MPEG4, MKTAG('M', '4', 'S', '2') },

216 { AV_CODEC_ID_MPEG4, MKTAG('M', 'P', '4', 'S') },

217 { AV_CODEC_ID_MSMPEG4V3, MKTAG('M', 'P', '4', '3') },

218 { AV_CODEC_ID_NONE, 0 },

219 };

220

221 #define PREROLL_TIME 3100

222

223 static void put_str16(AVIOContext *s, const char *tag)

224 {

225 int len;

226 uint8_t *pb;

227 AVIOContext *dyn_buf;

228 if (avio_open_dyn_buf(&dyn_buf) < 0)

229 return;

230

231 avio_put_str16le(dyn_buf, tag);

232 len = avio_close_dyn_buf(dyn_buf, &pb);

233 avio_wl16(s, len);

234 avio_write(s, pb, len);

235 av_freep(&pb);

236 }

237

238 static int64_t put_header(AVIOContext *pb, const ff_asf_guid *g)

239 {

240 int64_t pos;

241

242 pos = avio_tell(pb);

243 ff_put_guid(pb, g);

244 avio_wl64(pb, 24);

245 return pos;

246 }

247

248 /* update header size */

249 static void end_header(AVIOContext *pb, int64_t pos)

250 {

251 int64_t pos1;

252

253 pos1 = avio_tell(pb);

254 avio_seek(pb, pos + 16, SEEK_SET);

255 avio_wl64(pb, pos1 - pos);

256 avio_seek(pb, pos1, SEEK_SET);

257 }

258

259 /* write an asf chunk (only used in streaming case) */

260 static void put_chunk(AVFormatContext *s, int type,

261 int payload_length, int flags)

262 {

263 ASFContext *asf = s->priv_data;

264 AVIOContext *pb = s->pb;

265 int length;

266

267 length = payload_length + 8;

268 avio_wl16(pb, type);

269 avio_wl16(pb, length); // size

270 avio_wl32(pb, asf->seqno); // sequence number

271 avio_wl16(pb, flags); // unknown bytes

272 avio_wl16(pb, length); // size_confirm

273 asf->seqno++;

274 }

275

276 /* convert from unix to windows time */

277 static int64_t unix_to_file_time(int ti)

278 {

279 int64_t t;

280

281 t = ti * INT64_C(10000000);

282 t += INT64_C(116444736000000000);

283 return t;

284 }

285

286 static int32_t get_send_time(ASFContext *asf, int64_t pres_time, uint64_t *offset)

287 {

288 int i;

289 int32_t send_time = 0;

290 *offset = asf->data_offset + DATA_HEADER_SIZE;

291 for (i = 0; i < asf->next_start_sec; i++) {

292 if (pres_time <= asf->index_ptr[i].send_time)

293 break;

294 send_time = asf->index_ptr[i].send_time;

295 *offset = asf->index_ptr[i].offset;

296 }

297

298 return send_time / 10000;

299 }

300

301 static int asf_write_markers(AVFormatContext *s)

302 {

303 ASFContext *asf = s->priv_data;

304 AVIOContext *pb = s->pb;

305 int i;

306 AVRational scale = {1, 10000000};

307 int64_t hpos = put_header(pb, &ff_asf_marker_header);

308

309 ff_put_guid(pb, &ff_asf_reserved_4);// ASF spec mandates this reserved value

310 avio_wl32(pb, s->nb_chapters); // markers count

311 avio_wl16(pb, 0); // ASF spec mandates 0 for this

312 avio_wl16(pb, 0); // name length 0, no name given

313

314 for (i = 0; i < s->nb_chapters; i++) {

315 AVChapter *c = s->chapters[i];

316 AVDictionaryEntry *t = av_dict_get(c->metadata, "title", NULL, 0);

317 int64_t pres_time = av_rescale_q(c->start, c->time_base, scale);

318 uint64_t offset;

319 int32_t send_time = get_send_time(asf, pres_time, &offset);

320 int len = 0;

321 uint8_t *buf;

322 AVIOContext *dyn_buf;

323 if (t) {

324 if (avio_open_dyn_buf(&dyn_buf) < 0)

325 return AVERROR(ENOMEM);

326 avio_put_str16le(dyn_buf, t->value);

327 len = avio_close_dyn_buf(dyn_buf, &buf);

328 }

329 avio_wl64(pb, offset); // offset of the packet with send_time

330 avio_wl64(pb, pres_time + PREROLL_TIME * 10000); // presentation time

331 avio_wl16(pb, 12 + len); // entry length

332 avio_wl32(pb, send_time); // send time

333 avio_wl32(pb, 0); // flags, should be 0

334 avio_wl32(pb, len / 2); // marker desc length in WCHARS!

335 if (t) {

336 avio_write(pb, buf, len); // marker desc

337 av_freep(&buf);

338 }

339 }

340 end_header(pb, hpos);

341 return 0;

342 }

343

344 /* write the header (used two times if non streamed) */

345 static int asf_write_header1(AVFormatContext *s, int64_t file_size,

346 int64_t data_chunk_size)

347 {

348 ASFContext *asf = s->priv_data;

349 AVIOContext *pb = s->pb;

350 AVDictionaryEntry *tags[5];

351 int header_size, n, extra_size, extra_size2, wav_extra_size, file_time;

352 int has_title, has_aspect_ratio = 0;

353 int metadata_count;

354 AVCodecContext *enc;

355 int64_t header_offset, cur_pos, hpos;

356 int bit_rate;

357 int64_t duration;

358

359 ff_metadata_conv(&s->metadata, ff_asf_metadata_conv, NULL);

360

361 tags[0] = av_dict_get(s->metadata, "title", NULL, 0);

362 tags[1] = av_dict_get(s->metadata, "author", NULL, 0);

363 tags[2] = av_dict_get(s->metadata, "copyright", NULL, 0);

364 tags[3] = av_dict_get(s->metadata, "comment", NULL, 0);

365 tags[4] = av_dict_get(s->metadata, "rating", NULL, 0);

366

367 duration = asf->duration + PREROLL_TIME * 10000;

368 has_title = tags[0] || tags[1] || tags[2] || tags[3] || tags[4];

369 metadata_count = av_dict_count(s->metadata);

370

371 bit_rate = 0;

372 for (n = 0; n < s->nb_streams; n++) {

373 enc = s->streams[n]->codec;

374

375 avpriv_set_pts_info(s->streams[n], 32, 1, 1000); /* 32 bit pts in ms */

376

377 bit_rate += enc->bit_rate;

378 if ( enc->codec_type == AVMEDIA_TYPE_VIDEO

379 && enc->sample_aspect_ratio.num > 0

380 && enc->sample_aspect_ratio.den > 0)

381 has_aspect_ratio++;

382 }

383

384 if (asf->is_streamed) {

385 put_chunk(s, 0x4824, 0, 0xc00); /* start of stream (length will be patched later) */

386 }

387

388 ff_put_guid(pb, &ff_asf_header);

389 avio_wl64(pb, -1); /* header length, will be patched after */

390 avio_wl32(pb, 3 + has_title + !!metadata_count + s->nb_streams); /* number of chunks in header */

391 avio_w8(pb, 1); /* ??? */

392 avio_w8(pb, 2); /* ??? */

393

394 /* file header */

395 header_offset = avio_tell(pb);

396 hpos = put_header(pb, &ff_asf_file_header);

397 ff_put_guid(pb, &ff_asf_my_guid);

398 avio_wl64(pb, file_size);

399 file_time = 0;

400 avio_wl64(pb, unix_to_file_time(file_time));

401 avio_wl64(pb, asf->nb_packets); /* number of packets */

402 avio_wl64(pb, duration); /* end time stamp (in 100ns units) */

403 avio_wl64(pb, asf->duration); /* duration (in 100ns units) */

404 avio_wl64(pb, PREROLL_TIME); /* start time stamp */

405 avio_wl32(pb, (asf->is_streamed || !pb->seekable) ? 3 : 2); /* ??? */

406 avio_wl32(pb, s->packet_size); /* packet size */

407 avio_wl32(pb, s->packet_size); /* packet size */

408 avio_wl32(pb, bit_rate ? bit_rate : -1); /* Maximum data rate in bps */

409 end_header(pb, hpos);

410

411 /* unknown headers */

412 hpos = put_header(pb, &ff_asf_head1_guid);

413 ff_put_guid(pb, &ff_asf_head2_guid);

414 avio_wl16(pb, 6);

415 if (has_aspect_ratio) {

416 int64_t hpos2;

417 avio_wl32(pb, 26 + has_aspect_ratio * 84);

418 hpos2 = put_header(pb, &ff_asf_metadata_header);

419 avio_wl16(pb, 2 * has_aspect_ratio);

420 for (n = 0; n < s->nb_streams; n++) {

421 enc = s->streams[n]->codec;

422 if ( enc->codec_type == AVMEDIA_TYPE_VIDEO

423 && enc->sample_aspect_ratio.num > 0

424 && enc->sample_aspect_ratio.den > 0) {

425 AVRational sar = enc->sample_aspect_ratio;

426 avio_wl16(pb, 0);

427 // the stream number is set like this below

428 avio_wl16(pb, n + 1);

429 avio_wl16(pb, 26); // name_len

430 avio_wl16(pb, 3); // value_type

431 avio_wl32(pb, 4); // value_len

432 avio_put_str16le(pb, "AspectRatioX");

433 avio_wl32(pb, sar.num);

434 avio_wl16(pb, 0);

435 // the stream number is set like this below

436 avio_wl16(pb, n + 1);

437 avio_wl16(pb, 26); // name_len

438 avio_wl16(pb, 3); // value_type

439 avio_wl32(pb, 4); // value_len

440 avio_put_str16le(pb, "AspectRatioY");

441 avio_wl32(pb, sar.den);

442 }

443 }

444 end_header(pb, hpos2);

445 } else {

446 avio_wl32(pb, 0);

447 }

448 end_header(pb, hpos);

449

450 /* title and other infos */

451 if (has_title) {

452 int len;

453 uint8_t *buf;

454 AVIOContext *dyn_buf;

455

456 if (avio_open_dyn_buf(&dyn_buf) < 0)

457 return AVERROR(ENOMEM);

458

459 hpos = put_header(pb, &ff_asf_comment_header);

460

461 for (n = 0; n < FF_ARRAY_ELEMS(tags); n++) {

462 len = tags[n] ? avio_put_str16le(dyn_buf, tags[n]->value) : 0;

463 avio_wl16(pb, len);

464 }

465 len = avio_close_dyn_buf(dyn_buf, &buf);

466 avio_write(pb, buf, len);

467 av_freep(&buf);

468 end_header(pb, hpos);

469 }

470 if (metadata_count) {

471 AVDictionaryEntry *tag = NULL;

472 hpos = put_header(pb, &ff_asf_extended_content_header);

473 avio_wl16(pb, metadata_count);

474 while ((tag = av_dict_get(s->metadata, "", tag, AV_DICT_IGNORE_SUFFIX))) {

475 put_str16(pb, tag->key);

476 avio_wl16(pb, 0);

477 put_str16(pb, tag->value);

478 }

479 end_header(pb, hpos);

480 }

481 /* chapters using ASF markers */

482 if (!asf->is_streamed && s->nb_chapters) {

483 int ret;

484 if ((ret = asf_write_markers(s)) < 0)

485 return ret;

486 }

487 /* stream headers */

488 for (n = 0; n < s->nb_streams; n++) {

489 int64_t es_pos;

490 // ASFStream *stream = &asf->streams[n];

491

492 enc = s->streams[n]->codec;

493 asf->streams[n].num = n + 1;

494 asf->streams[n].seq = 1;

495

496 switch (enc->codec_type) {

497 case AVMEDIA_TYPE_AUDIO:

498 wav_extra_size = 0;

499 extra_size = 18 + wav_extra_size;

500 extra_size2 = 8;

501 break;

502 default:

503 case AVMEDIA_TYPE_VIDEO:

504 wav_extra_size = enc->extradata_size;

505 extra_size = 0x33 + wav_extra_size;

506 extra_size2 = 0;

507 break;

508 }

509

510 hpos = put_header(pb, &ff_asf_stream_header);

511 if (enc->codec_type == AVMEDIA_TYPE_AUDIO) {

512 ff_put_guid(pb, &ff_asf_audio_stream);

513 ff_put_guid(pb, &ff_asf_audio_conceal_spread);

514 } else {

515 ff_put_guid(pb, &ff_asf_video_stream);

516 ff_put_guid(pb, &ff_asf_video_conceal_none);

517 }

518 avio_wl64(pb, 0); /* ??? */

519 es_pos = avio_tell(pb);

520 avio_wl32(pb, extra_size); /* wav header len */

521 avio_wl32(pb, extra_size2); /* additional data len */

522 avio_wl16(pb, n + 1); /* stream number */

523 avio_wl32(pb, 0); /* ??? */

524

525 if (enc->codec_type == AVMEDIA_TYPE_AUDIO) {

526 /* WAVEFORMATEX header */

527 int wavsize = ff_put_wav_header(pb, enc, FF_PUT_WAV_HEADER_FORCE_WAVEFORMATEX);

528

529 if (wavsize < 0)

530 return -1;

531 if (wavsize != extra_size) {

532 cur_pos = avio_tell(pb);

533 avio_seek(pb, es_pos, SEEK_SET);

534 avio_wl32(pb, wavsize); /* wav header len */

535 avio_seek(pb, cur_pos, SEEK_SET);

536 }

537 /* ERROR Correction */

538 avio_w8(pb, 0x01);

539 if (enc->codec_id == AV_CODEC_ID_ADPCM_G726 || !enc->block_align) {

540 avio_wl16(pb, 0x0190);

541 avio_wl16(pb, 0x0190);

542 } else {

543 avio_wl16(pb, enc->block_align);

544 avio_wl16(pb, enc->block_align);

545 }

546 avio_wl16(pb, 0x01);

547 avio_w8(pb, 0x00);

548 } else {

549 avio_wl32(pb, enc->width);

550 avio_wl32(pb, enc->height);

551 avio_w8(pb, 2); /* ??? */

552 avio_wl16(pb, 40 + enc->extradata_size); /* size */

553

554 /* BITMAPINFOHEADER header */

555 ff_put_bmp_header(pb, enc, ff_codec_bmp_tags, 1, 0);

556 }

557 end_header(pb, hpos);

558 }

559

560 /* media comments */

561

562 hpos = put_header(pb, &ff_asf_codec_comment_header);

563 ff_put_guid(pb, &ff_asf_codec_comment1_header);

564 avio_wl32(pb, s->nb_streams);

565 for (n = 0; n < s->nb_streams; n++) {

566 const AVCodecDescriptor *codec_desc;

567 const char *desc;

568

569 enc = s->streams[n]->codec;

570 codec_desc = avcodec_descriptor_get(enc->codec_id);

571

572 if (enc->codec_type == AVMEDIA_TYPE_AUDIO)

573 avio_wl16(pb, 2);

574 else if (enc->codec_type == AVMEDIA_TYPE_VIDEO)

575 avio_wl16(pb, 1);

576 else

577 avio_wl16(pb, -1);

578

579 if (enc->codec_id == AV_CODEC_ID_WMAV2)

580 desc = "Windows Media Audio V8";

581 else

582 desc = codec_desc ? codec_desc->name : NULL;

583

584 if (desc) {

585 AVIOContext *dyn_buf;

586 uint8_t *buf;

587 int len;

588

589 if (avio_open_dyn_buf(&dyn_buf) < 0)

590 return AVERROR(ENOMEM);

591

592 avio_put_str16le(dyn_buf, desc);

593 len = avio_close_dyn_buf(dyn_buf, &buf);

594 avio_wl16(pb, len / 2); // "number of characters" = length in bytes / 2

595

596 avio_write(pb, buf, len);

597 av_freep(&buf);

598 } else

599 avio_wl16(pb, 0);

600

601 avio_wl16(pb, 0); /* no parameters */

602

603 /* id */

604 if (enc->codec_type == AVMEDIA_TYPE_AUDIO) {

605 avio_wl16(pb, 2);

606 avio_wl16(pb, enc->codec_tag);

607 } else {

608 avio_wl16(pb, 4);

609 avio_wl32(pb, enc->codec_tag);

610 }

611 if (!enc->codec_tag)

612 return -1;

613 }

614 end_header(pb, hpos);

615

616 /* patch the header size fields */

617

618 cur_pos = avio_tell(pb);

619 header_size = cur_pos - header_offset;

620 if (asf->is_streamed) {

621 header_size += 8 + 30 + DATA_HEADER_SIZE;

622

623 avio_seek(pb, header_offset - 10 - 30, SEEK_SET);

624 avio_wl16(pb, header_size);

625 avio_seek(pb, header_offset - 2 - 30, SEEK_SET);

626 avio_wl16(pb, header_size);

627

628 header_size -= 8 + 30 + DATA_HEADER_SIZE;

629 }

630 header_size += 24 + 6;

631 avio_seek(pb, header_offset - 14, SEEK_SET);

632 avio_wl64(pb, header_size);

633 avio_seek(pb, cur_pos, SEEK_SET);

634

635 /* movie chunk, followed by packets of packet_size */

636 asf->data_offset = cur_pos;

637 ff_put_guid(pb, &ff_asf_data_header);

638 avio_wl64(pb, data_chunk_size);

639 ff_put_guid(pb, &ff_asf_my_guid);

640 avio_wl64(pb, asf->nb_packets); /* nb packets */

641 avio_w8(pb, 1); /* ??? */

642 avio_w8(pb, 1); /* ??? */

643 return 0;

644 }

645

646 static int asf_write_header(AVFormatContext *s)

647 {

648 ASFContext *asf = s->priv_data;

649

650 s->packet_size = PACKET_SIZE;

651 s->max_interleave_delta = 0;

652 asf->nb_packets = 0;

653

654 asf->index_ptr = av_malloc(sizeof(ASFIndex) * ASF_INDEX_BLOCK);

655 asf->nb_index_memory_alloc = ASF_INDEX_BLOCK;

656 asf->maximum_packet = 0;

657

658 /* the data-chunk-size has to be 50 (DATA_HEADER_SIZE), which is

659 * data_size - asf->data_offset at the moment this function is done.

660 * It is needed to use asf as a streamable format. */

661 if (asf_write_header1(s, 0, DATA_HEADER_SIZE) < 0) {

662 //av_free(asf);

663 return -1;

664 }

665

666 avio_flush(s->pb);

667

668 asf->packet_nb_payloads = 0;

669 asf->packet_timestamp_start = -1;

670 asf->packet_timestamp_end = -1;

671 ffio_init_context(&asf->pb, asf->packet_buf, s->packet_size, 1,

672 NULL, NULL, NULL, NULL);

673

674 if (s->avoid_negative_ts < 0)

675 s->avoid_negative_ts = 1;

676

677 return 0;

678 }

679

680 static int asf_write_stream_header(AVFormatContext *s)

681 {

682 ASFContext *asf = s->priv_data;

683

684 asf->is_streamed = 1;

685

686 return asf_write_header(s);

687 }

688

689 static int put_payload_parsing_info(AVFormatContext *s,

690 unsigned sendtime, unsigned duration,

691 int nb_payloads, int padsize)

692 {

693 ASFContext *asf = s->priv_data;

694 AVIOContext *pb = s->pb;

695 int ppi_size, i;

696 int64_t start = avio_tell(pb);

697

698 int iLengthTypeFlags = ASF_PPI_LENGTH_TYPE_FLAGS;

699

700 padsize -= PACKET_HEADER_MIN_SIZE;

701 if (asf->multi_payloads_present)

702 padsize--;

703 av_assert0(padsize >= 0);

704

705 avio_w8(pb, ASF_PACKET_ERROR_CORRECTION_FLAGS);

706 for (i = 0; i < ASF_PACKET_ERROR_CORRECTION_DATA_SIZE; i++)

707 avio_w8(pb, 0x0);

708

709 if (asf->multi_payloads_present)

710 iLengthTypeFlags |= ASF_PPI_FLAG_MULTIPLE_PAYLOADS_PRESENT;

711

712 if (padsize > 0) {

713 if (padsize < 256)

714 iLengthTypeFlags |= ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_BYTE;

715 else

716 iLengthTypeFlags |= ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_WORD;

717 }

718 avio_w8(pb, iLengthTypeFlags);

719

720 avio_w8(pb, ASF_PPI_PROPERTY_FLAGS);

721

722 if (iLengthTypeFlags & ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_WORD)

723 avio_wl16(pb, padsize - 2);

724 if (iLengthTypeFlags & ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_BYTE)

725 avio_w8(pb, padsize - 1);

726

727 avio_wl32(pb, sendtime);

728 avio_wl16(pb, duration);

729 if (asf->multi_payloads_present)

730 avio_w8(pb, nb_payloads | ASF_PAYLOAD_FLAGS);

731

732 ppi_size = avio_tell(pb) - start;

733

734 return ppi_size;

735 }

736

737 static void flush_packet(AVFormatContext *s)

738 {

739 ASFContext *asf = s->priv_data;

740 int packet_hdr_size, packet_filled_size;

741

742 av_assert0(asf->packet_timestamp_end >= asf->packet_timestamp_start);

743

744 if (asf->is_streamed)

745 put_chunk(s, 0x4424, s->packet_size, 0);

746

747 packet_hdr_size = put_payload_parsing_info(s,

748 asf->packet_timestamp_start,

749 asf->packet_timestamp_end - asf->packet_timestamp_start,

750 asf->packet_nb_payloads,

751 asf->packet_size_left);

752

753 packet_filled_size = PACKET_SIZE - asf->packet_size_left;

754 av_assert0(packet_hdr_size <= asf->packet_size_left);

755 memset(asf->packet_buf + packet_filled_size, 0, asf->packet_size_left);

756

757 avio_write(s->pb, asf->packet_buf, s->packet_size - packet_hdr_size);

758

759 avio_flush(s->pb);

760 asf->nb_packets++;

761 asf->packet_nb_payloads = 0;

762 asf->packet_timestamp_start = -1;

763 asf->packet_timestamp_end = -1;

764 ffio_init_context(&asf->pb, asf->packet_buf, s->packet_size, 1,

765 NULL, NULL, NULL, NULL);

766 }

767

768 static void put_payload_header(AVFormatContext *s, ASFStream *stream,

769 int64_t presentation_time, int m_obj_size,

770 int m_obj_offset, int payload_len, int flags)

771 {

772 ASFContext *asf = s->priv_data;

773 AVIOContext *pb = &asf->pb;

774 int val;

775

776 val = stream->num;

777 if (flags & AV_PKT_FLAG_KEY)

778 val |= ASF_PL_FLAG_KEY_FRAME;

779 avio_w8(pb, val);

780

781 avio_w8(pb, stream->seq); // Media object number

782 avio_wl32(pb, m_obj_offset); // Offset Into Media Object

783

784 // Replicated Data shall be at least 8 bytes long.

785 // The first 4 bytes of data shall contain the

786 // Size of the Media Object that the payload belongs to.

787 // The next 4 bytes of data shall contain the

788 // Presentation Time for the media object that the payload belongs to.

789 avio_w8(pb, ASF_PAYLOAD_REPLICATED_DATA_LENGTH);

790

791 avio_wl32(pb, m_obj_size); // Replicated Data - Media Object Size

792 avio_wl32(pb, (uint32_t) presentation_time); // Replicated Data - Presentation Time

793

794 if (asf->multi_payloads_present) {

795 avio_wl16(pb, payload_len); // payload length

796 }

797 }

798

799 static void put_frame(AVFormatContext *s, ASFStream *stream, AVStream *avst,

800 int64_t timestamp, const uint8_t *buf,

801 int m_obj_size, int flags)

802 {

803 ASFContext *asf = s->priv_data;

804 int m_obj_offset, payload_len, frag_len1;

805

806 m_obj_offset = 0;

807 while (m_obj_offset < m_obj_size) {

808 payload_len = m_obj_size - m_obj_offset;

809 if (asf->packet_timestamp_start == -1) {

810 asf->multi_payloads_present = (payload_len < MULTI_PAYLOAD_CONSTANT);

811

812 asf->packet_size_left = PACKET_SIZE;

813 if (asf->multi_payloads_present) {

814 frag_len1 = MULTI_PAYLOAD_CONSTANT - 1;

815 } else {

816 frag_len1 = SINGLE_PAYLOAD_DATA_LENGTH;

817 }

818 asf->packet_timestamp_start = timestamp;

819 } else {

820 // multi payloads

821 frag_len1 = asf->packet_size_left -

822 PAYLOAD_HEADER_SIZE_MULTIPLE_PAYLOADS -

823 PACKET_HEADER_MIN_SIZE - 1;

824

825 if (frag_len1 < payload_len &&

826 avst->codec->codec_type == AVMEDIA_TYPE_AUDIO) {

827 flush_packet(s);

828 continue;

829 }

830 }

831 if (frag_len1 > 0) {

832 if (payload_len > frag_len1)

833 payload_len = frag_len1;

834 else if (payload_len == (frag_len1 - 1))

835 payload_len = frag_len1 - 2; // additional byte need to put padding length

836

837 put_payload_header(s, stream, timestamp + PREROLL_TIME,

838 m_obj_size, m_obj_offset, payload_len, flags);

839 avio_write(&asf->pb, buf, payload_len);

840

841 if (asf->multi_payloads_present)

842 asf->packet_size_left -= (payload_len + PAYLOAD_HEADER_SIZE_MULTIPLE_PAYLOADS);

843 else

844 asf->packet_size_left -= (payload_len + PAYLOAD_HEADER_SIZE_SINGLE_PAYLOAD);

845 asf->packet_timestamp_end = timestamp;

846

847 asf->packet_nb_payloads++;

848 } else {

849 payload_len = 0;

850 }

851 m_obj_offset += payload_len;

852 buf += payload_len;

853

854 if (!asf->multi_payloads_present)

855 flush_packet(s);

856 else if (asf->packet_size_left <= (PAYLOAD_HEADER_SIZE_MULTIPLE_PAYLOADS + PACKET_HEADER_MIN_SIZE + 1))

857 flush_packet(s);

858 else if (asf->packet_nb_payloads == ASF_PAYLOADS_PER_PACKET)

859 flush_packet(s);

860 }

861 stream->seq++;

862 }

863

864 static int update_index(AVFormatContext *s, int start_sec,

865 uint32_t packet_number, uint16_t packet_count,

866 uint64_t packet_offset)

867 {

868 ASFContext *asf = s->priv_data;

869

870 if (start_sec > asf->next_start_sec) {

871 int i;

872

873 if (!asf->next_start_sec) {

874 asf->next_packet_number = packet_number;

875 asf->next_packet_count = packet_count;

876 asf->next_packet_offset = packet_offset;

877 }

878

879 if (start_sec > asf->nb_index_memory_alloc) {

880 int err;

881 asf->nb_index_memory_alloc = (start_sec + ASF_INDEX_BLOCK) & ~(ASF_INDEX_BLOCK - 1);

882 if ((err = av_reallocp_array(&asf->index_ptr,

883 asf->nb_index_memory_alloc,

884 sizeof(*asf->index_ptr))) < 0) {

885 asf->nb_index_memory_alloc = 0;

886 return err;

887 }

888 }

889 for (i = asf->next_start_sec; i < start_sec; i++) {

890 asf->index_ptr[i].packet_number = asf->next_packet_number;

891 asf->index_ptr[i].packet_count = asf->next_packet_count;

892 asf->index_ptr[i].send_time = asf->next_start_sec * INT64_C(10000000);

893 asf->index_ptr[i].offset = asf->next_packet_offset;

894

895 }

896 }

897 asf->maximum_packet = FFMAX(asf->maximum_packet, packet_count);

898 asf->next_packet_number = packet_number;

899 asf->next_packet_count = packet_count;

900 asf->next_packet_offset = packet_offset;

901 asf->next_start_sec = start_sec;

902

903 return 0;

904 }

905

906 static int asf_write_packet(AVFormatContext *s, AVPacket *pkt)

907 {

908 ASFContext *asf = s->priv_data;

909 AVIOContext *pb = s->pb;

910 ASFStream *stream;

911 AVCodecContext *codec;

912 uint32_t packet_number;

913 int64_t pts;

914 int start_sec;

915 int flags = pkt->flags;

916 int ret;

917 uint64_t offset = avio_tell(pb);

918

919 codec = s->streams[pkt->stream_index]->codec;

920 stream = &asf->streams[pkt->stream_index];

921

922 if (codec->codec_type == AVMEDIA_TYPE_AUDIO)

923 flags &= ~AV_PKT_FLAG_KEY;

924

925 pts = (pkt->pts != AV_NOPTS_VALUE) ? pkt->pts : pkt->dts;

926 av_assert0(pts != AV_NOPTS_VALUE);

927 pts *= 10000;

928 asf->duration = FFMAX(asf->duration, pts + pkt->duration * 10000);

929

930 packet_number = asf->nb_packets;

931 put_frame(s, stream, s->streams[pkt->stream_index],

932 pkt->dts, pkt->data, pkt->size, flags);

933

934 start_sec = (int)((PREROLL_TIME * 10000 + pts + ASF_INDEXED_INTERVAL - 1)

935 / ASF_INDEXED_INTERVAL);

936

937 /* check index */

938 if ((!asf->is_streamed) && (flags & AV_PKT_FLAG_KEY)) {

939 uint16_t packet_count = asf->nb_packets - packet_number;

940 ret = update_index(s, start_sec, packet_number, packet_count, offset);

941 if (ret < 0)

942 return ret;

943 }

944 asf->end_sec = start_sec;

945

946 return 0;

947 }

948

949 static int asf_write_index(AVFormatContext *s, const ASFIndex *index,

950 uint16_t max, uint32_t count)

951 {

952 AVIOContext *pb = s->pb;

953 int i;

954

955 ff_put_guid(pb, &ff_asf_simple_index_header);

956 avio_wl64(pb, 24 + 16 + 8 + 4 + 4 + (4 + 2) * count);

957 ff_put_guid(pb, &ff_asf_my_guid);

958 avio_wl64(pb, ASF_INDEXED_INTERVAL);

959 avio_wl32(pb, max);

960 avio_wl32(pb, count);

961 for (i = 0; i < count; i++) {

962 avio_wl32(pb, index[i].packet_number);

963 avio_wl16(pb, index[i].packet_count);

964 }

965

966 return 0;

967 }

968

969 static int asf_write_trailer(AVFormatContext *s)

970 {

971 ASFContext *asf = s->priv_data;

972 int64_t file_size, data_size;

973 int ret;

974

975 /* flush the current packet */

976 if (asf->pb.buf_ptr > asf->pb.buffer)

977 flush_packet(s);

978

979 /* write index */

980 data_size = avio_tell(s->pb);

981 if (!asf->is_streamed && asf->next_start_sec) {

982 if ((ret = update_index(s, asf->end_sec + 1, 0, 0, 0)) < 0)

983 return ret;

984 asf_write_index(s, asf->index_ptr, asf->maximum_packet, asf->next_start_sec);

985 }

986 avio_flush(s->pb);

987

988 if (asf->is_streamed || !s->pb->seekable) {

989 put_chunk(s, 0x4524, 0, 0); /* end of stream */

990 } else {

991 /* rewrite an updated header */

992 file_size = avio_tell(s->pb);

993 avio_seek(s->pb, 0, SEEK_SET);

994 asf_write_header1(s, file_size, data_size - asf->data_offset);

995 }

996

997 av_freep(&asf->index_ptr);

998 return 0;

999 }

1000

1001 #if CONFIG_ASF_MUXER

1002 AVOutputFormat ff_asf_muxer = {

1003 .name = "asf",

1004 .long_name = NULL_IF_CONFIG_SMALL("ASF (Advanced / Active Streaming Format)"),

1005 .mime_type = "video/x-ms-asf",

1006 .extensions = "asf,wmv,wma",

1007 .priv_data_size = sizeof(ASFContext),

1008 .audio_codec = AV_CODEC_ID_WMAV2,

1009 .video_codec = AV_CODEC_ID_MSMPEG4V3,

1010 .write_header = asf_write_header,

1011 .write_packet = asf_write_packet,

1012 .write_trailer = asf_write_trailer,

1013 .flags = AVFMT_GLOBALHEADER,

1014 .codec_tag = (const AVCodecTag * const []) {

1015 codec_asf_bmp_tags, ff_codec_bmp_tags, ff_codec_wav_tags, 0

1016 },

1017 };

1018 #endif /* CONFIG_ASF_MUXER */

1019

1020 #if CONFIG_ASF_STREAM_MUXER

1021 AVOutputFormat ff_asf_stream_muxer = {

1022 .name = "asf_stream",

1023 .long_name = NULL_IF_CONFIG_SMALL("ASF (Advanced / Active Streaming Format)"),

1024 .mime_type = "video/x-ms-asf",

1025 .extensions = "asf,wmv,wma",

1026 .priv_data_size = sizeof(ASFContext),

1027 .audio_codec = AV_CODEC_ID_WMAV2,

1028 .video_codec = AV_CODEC_ID_MSMPEG4V3,

1029 .write_header = asf_write_stream_header,

1030 .write_packet = asf_write_packet,

1031 .write_trailer = asf_write_trailer,

1032 .flags = AVFMT_GLOBALHEADER,

1033 .codec_tag = (const AVCodecTag * const []) {

1034 codec_asf_bmp_tags, ff_codec_bmp_tags, ff_codec_wav_tags, 0

1035 },

1036 };

1037 #endif /* CONFIG_ASF_STREAM_MUXER */

Generated on Sun Mar 8 2015 02:35:08 for FFmpeg by doxygen 1.8.2