FFmpeg: libavformat/swfdec.c Source File

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libavformat

swfdec.c

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1 /*

2 * Flash Compatible Streaming Format demuxer

5 *

6 * This file is part of FFmpeg.

7 *

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

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

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

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

12 *

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

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

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

16 * Lesser General Public License for more details.

17 *

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

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

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

21 */

23 #include "config.h"

25 #if CONFIG_ZLIB

26 #include <zlib.h>

27 #endif

29 #include "libavutil/avassert.h"

30 #include "libavutil/channel_layout.h"

31 #include "libavutil/imgutils.h"

32 #include "libavutil/internal.h"

33 #include "libavutil/intreadwrite.h"

34 #include "libavcodec/get_bits.h"

35 #include "swf.h"

37 static const AVCodecTag swf_audio_codec_tags[] = {

38 { AV_CODEC_ID_PCM_S16LE, 0x00 },

39 { AV_CODEC_ID_ADPCM_SWF, 0x01 },

40 { AV_CODEC_ID_MP3, 0x02 },

41 { AV_CODEC_ID_PCM_S16LE, 0x03 },

42 // { AV_CODEC_ID_NELLYMOSER, 0x06 },

43 { AV_CODEC_ID_NONE, 0 },

44 };

46 static int get_swf_tag(AVIOContext *pb, int *len_ptr)

47 {

48 int tag, len;

50 if (avio_feof(pb))

51 return AVERROR_EOF;

53 tag = avio_rl16(pb);

54 len = tag & 0x3f;

55 tag = tag >> 6;

56 if (len == 0x3f) {

57 len = avio_rl32(pb);

58 }

59 *len_ptr = len;

60 return tag;

61 }

64 static int swf_probe(AVProbeData *p)

65 {

66 GetBitContext gb;

67 int len, xmin, xmax, ymin, ymax;

69 if(p->buf_size < 15)

70 return 0;

72 /* check file header */

73 if ( AV_RB24(p->buf) != AV_RB24("CWS")

74 && AV_RB24(p->buf) != AV_RB24("FWS"))

75 return 0;

77 if ( AV_RB24(p->buf) == AV_RB24("CWS")

78 && p->buf[3] <= 20)

79 return AVPROBE_SCORE_MAX / 4 + 1;

81 if (init_get_bits8(&gb, p->buf + 3, p->buf_size - 3) < 0)

82 return 0;

84 skip_bits(&gb, 40);

85 len = get_bits(&gb, 5);

86 if (!len)

87 return 0;

88 xmin = get_bits_long(&gb, len);

89 xmax = get_bits_long(&gb, len);

90 ymin = get_bits_long(&gb, len);

91 ymax = get_bits_long(&gb, len);

92 if (xmin || ymin || !xmax || !ymax)

93 return 0;

95 if (p->buf[3] >= 20 || xmax < 16 || ymax < 16)

96 return AVPROBE_SCORE_MAX / 4;

98 return AVPROBE_SCORE_EXTENSION + 1;

99 }

100

101 #if CONFIG_ZLIB

102 static int zlib_refill(void *opaque, uint8_t *buf, int buf_size)

103 {

104 AVFormatContext *s = opaque;

105 SWFContext *swf = s->priv_data;

106 z_stream *z = &swf->zstream;

107 int ret;

108

109 retry:

110 if (!z->avail_in) {

111 int n = avio_read(s->pb, swf->zbuf_in, ZBUF_SIZE);

112 if (n < 0)

113 return n;

114 z->next_in = swf->zbuf_in;

115 z->avail_in = n;

116 }

117

118 z->next_out = buf;

119 z->avail_out = buf_size;

120

121 ret = inflate(z, Z_NO_FLUSH);

122 if (ret == Z_STREAM_END)

123 return AVERROR_EOF;

124 if (ret != Z_OK)

125 return AVERROR(EINVAL);

126

127 if (buf_size - z->avail_out == 0)

128 goto retry;

129

130 return buf_size - z->avail_out;

131 }

132 #endif

133

134 static int swf_read_header(AVFormatContext *s)

135 {

136 SWFContext *swf = s->priv_data;

137 AVIOContext *pb = s->pb;

138 int nbits, len, tag;

139

140 tag = avio_rb32(pb) & 0xffffff00;

141 avio_rl32(pb);

142

143 if (tag == MKBETAG('C', 'W', 'S', 0)) {

144 av_log(s, AV_LOG_INFO, "SWF compressed file detected\n");

145 #if CONFIG_ZLIB

146 swf->zbuf_in = av_malloc(ZBUF_SIZE);

147 swf->zbuf_out = av_malloc(ZBUF_SIZE);

148 swf->zpb = avio_alloc_context(swf->zbuf_out, ZBUF_SIZE, 0, s,

149 zlib_refill, NULL, NULL);

150 if (!swf->zbuf_in || !swf->zbuf_out || !swf->zpb)

151 return AVERROR(ENOMEM);

152 swf->zpb->seekable = 0;

153 if (inflateInit(&swf->zstream) != Z_OK) {

154 av_log(s, AV_LOG_ERROR, "Unable to init zlib context\n");

155 return AVERROR(EINVAL);

156 }

157 pb = swf->zpb;

158 #else

159 av_log(s, AV_LOG_ERROR, "zlib support is required to read SWF compressed files\n");

160 return AVERROR(EIO);

161 #endif

162 } else if (tag != MKBETAG('F', 'W', 'S', 0))

163 return AVERROR(EIO);

164 /* skip rectangle size */

165 nbits = avio_r8(pb) >> 3;

166 len = (4 * nbits - 3 + 7) / 8;

167 avio_skip(pb, len);

168 swf->frame_rate = avio_rl16(pb); /* 8.8 fixed */

169 avio_rl16(pb); /* frame count */

170

171 swf->samples_per_frame = 0;

172 s->ctx_flags |= AVFMTCTX_NOHEADER;

173 return 0;

174 }

175

176 static AVStream *create_new_audio_stream(AVFormatContext *s, int id, int info)

177 {

178 int sample_rate_code, sample_size_code;

179 AVStream *ast = avformat_new_stream(s, NULL);

180 if (!ast)

181 return NULL;

182 ast->id = id;

183 if (info & 1) {

184 ast->codecpar->channels = 2;

185 ast->codecpar->channel_layout = AV_CH_LAYOUT_STEREO;

186 } else {

187 ast->codecpar->channels = 1;

188 ast->codecpar->channel_layout = AV_CH_LAYOUT_MONO;

189 }

190 ast->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;

191 ast->codecpar->codec_id = ff_codec_get_id(swf_audio_codec_tags, info>>4 & 15);

192 ast->need_parsing = AVSTREAM_PARSE_FULL;

193 sample_rate_code = info>>2 & 3;

194 sample_size_code = info>>1 & 1;

195 if (!sample_size_code && ast->codecpar->codec_id == AV_CODEC_ID_PCM_S16LE)

196 ast->codecpar->codec_id = AV_CODEC_ID_PCM_U8;

197 ast->codecpar->sample_rate = 44100 >> (3 - sample_rate_code);

198 avpriv_set_pts_info(ast, 64, 1, ast->codecpar->sample_rate);

199 return ast;

200 }

201

202 static int swf_read_packet(AVFormatContext *s, AVPacket *pkt)

203 {

204 SWFContext *swf = s->priv_data;

205 AVIOContext *pb = s->pb;

206 AVStream *vst = NULL, *ast = NULL, *st = 0;

207 int tag, len, i, frame, v, res;

208

209 #if CONFIG_ZLIB

210 if (swf->zpb)

211 pb = swf->zpb;

212 #endif

213

214 for(;;) {

215 uint64_t pos = avio_tell(pb);

216 tag = get_swf_tag(pb, &len);

217 if (tag < 0)

218 return tag;

219 if (len < 0) {

220 av_log(s, AV_LOG_ERROR, "invalid tag length: %d\n", len);

221 return AVERROR_INVALIDDATA;

222 }

223 if (tag == TAG_VIDEOSTREAM) {

224 int ch_id = avio_rl16(pb);

225 len -= 2;

226

227 for (i=0; i<s->nb_streams; i++) {

228 st = s->streams[i];

229 if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO && st->id == ch_id)

230 goto skip;

231 }

232

233 avio_rl16(pb);

234 avio_rl16(pb);

235 avio_rl16(pb);

236 avio_r8(pb);

237 /* Check for FLV1 */

238 vst = avformat_new_stream(s, NULL);

239 if (!vst)

240 return AVERROR(ENOMEM);

241 vst->id = ch_id;

242 vst->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;

243 vst->codecpar->codec_id = ff_codec_get_id(ff_swf_codec_tags, avio_r8(pb));

244 avpriv_set_pts_info(vst, 16, 256, swf->frame_rate);

245 len -= 8;

246 } else if (tag == TAG_STREAMHEAD || tag == TAG_STREAMHEAD2) {

247 /* streaming found */

248

249 for (i=0; i<s->nb_streams; i++) {

250 st = s->streams[i];

251 if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO && st->id == -1)

252 goto skip;

253 }

254

255 avio_r8(pb);

256 v = avio_r8(pb);

257 swf->samples_per_frame = avio_rl16(pb);

258 ast = create_new_audio_stream(s, -1, v); /* -1 to avoid clash with video stream ch_id */

259 if (!ast)

260 return AVERROR(ENOMEM);

261 len -= 4;

262 } else if (tag == TAG_DEFINESOUND) {

263 /* audio stream */

264 int ch_id = avio_rl16(pb);

265

266 for (i=0; i<s->nb_streams; i++) {

267 st = s->streams[i];

268 if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO && st->id == ch_id)

269 goto skip;

270 }

271

272 // FIXME: The entire audio stream is stored in a single chunk/tag. Normally,

273 // these are smaller audio streams in DEFINESOUND tags, but it's technically

274 // possible they could be huge. Break it up into multiple packets if it's big.

275 v = avio_r8(pb);

276 ast = create_new_audio_stream(s, ch_id, v);

277 if (!ast)

278 return AVERROR(ENOMEM);

279 ast->duration = avio_rl32(pb); // number of samples

280 if (((v>>4) & 15) == 2) { // MP3 sound data record

281 ast->skip_samples = avio_rl16(pb);

282 len -= 2;

283 }

284 len -= 7;

285 if ((res = av_get_packet(pb, pkt, len)) < 0)

286 return res;

287 pkt->pos = pos;

288 pkt->stream_index = ast->index;

289 return pkt->size;

290 } else if (tag == TAG_VIDEOFRAME) {

291 int ch_id = avio_rl16(pb);

292 len -= 2;

293 for(i=0; i<s->nb_streams; i++) {

294 st = s->streams[i];

295 if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO && st->id == ch_id) {

296 frame = avio_rl16(pb);

297 len -= 2;

298 if (len <= 0)

299 goto skip;

300 if ((res = av_get_packet(pb, pkt, len)) < 0)

301 return res;

302 pkt->pos = pos;

303 pkt->pts = frame;

304 pkt->stream_index = st->index;

305 return pkt->size;

306 }

307 }

308 } else if (tag == TAG_DEFINEBITSLOSSLESS || tag == TAG_DEFINEBITSLOSSLESS2) {

309 #if CONFIG_ZLIB

310 long out_len;

311 uint8_t *buf = NULL, *zbuf = NULL, *pal;

312 uint32_t colormap[AVPALETTE_COUNT] = {0};

313 const int alpha_bmp = tag == TAG_DEFINEBITSLOSSLESS2;

314 const int colormapbpp = 3 + alpha_bmp;

315 int linesize, colormapsize = 0;

316

317 const int ch_id = avio_rl16(pb);

318 const int bmp_fmt = avio_r8(pb);

319 const int width = avio_rl16(pb);

320 const int height = avio_rl16(pb);

321 int pix_fmt;

322

323 len -= 2+1+2+2;

324

325 switch (bmp_fmt) {

326 case 3: // PAL-8

327 linesize = width;

328 colormapsize = avio_r8(pb) + 1;

329 len--;

330 break;

331 case 4: // RGB15

332 linesize = width * 2;

333 break;

334 case 5: // RGB24 (0RGB)

335 linesize = width * 4;

336 break;

337 default:

338 av_log(s, AV_LOG_ERROR, "invalid bitmap format %d, skipped\n", bmp_fmt);

339 goto bitmap_end_skip;

340 }

341

342 linesize = FFALIGN(linesize, 4);

343

344 if (av_image_check_size(width, height, 0, s) < 0 ||

345 linesize >= INT_MAX / height ||

346 linesize * height >= INT_MAX - colormapsize * colormapbpp) {

347 av_log(s, AV_LOG_ERROR, "invalid frame size %dx%d\n", width, height);

348 goto bitmap_end_skip;

349 }

350

351 out_len = colormapsize * colormapbpp + linesize * height;

352

353 ff_dlog(s, "bitmap: ch=%d fmt=%d %dx%d (linesize=%d) len=%d->%ld pal=%d\n",

354 ch_id, bmp_fmt, width, height, linesize, len, out_len, colormapsize);

355

356 zbuf = av_malloc(len);

357 buf = av_malloc(out_len);

358 if (!zbuf || !buf) {

359 res = AVERROR(ENOMEM);

360 goto bitmap_end;

361 }

362

363 len = avio_read(pb, zbuf, len);

364 if (len < 0 || (res = uncompress(buf, &out_len, zbuf, len)) != Z_OK) {

365 av_log(s, AV_LOG_WARNING, "Failed to uncompress one bitmap\n");

366 goto bitmap_end_skip;

367 }

368

369 for (i = 0; i < s->nb_streams; i++) {

370 st = s->streams[i];

371 if (st->codecpar->codec_id == AV_CODEC_ID_RAWVIDEO && st->id == -3)

372 break;

373 }

374 if (i == s->nb_streams) {

375 vst = avformat_new_stream(s, NULL);

376 if (!vst) {

377 res = AVERROR(ENOMEM);

378 goto bitmap_end;

379 }

380 vst->id = -3; /* -3 to avoid clash with video stream and audio stream */

381 vst->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;

382 vst->codecpar->codec_id = AV_CODEC_ID_RAWVIDEO;

383 avpriv_set_pts_info(vst, 64, 256, swf->frame_rate);

384 st = vst;

385 }

386

387 if ((res = av_new_packet(pkt, out_len - colormapsize * colormapbpp)) < 0)

388 goto bitmap_end;

389 if (!st->codecpar->width && !st->codecpar->height) {

390 st->codecpar->width = width;

391 st->codecpar->height = height;

392 } else {

393 ff_add_param_change(pkt, 0, 0, 0, width, height);

394 }

395 pkt->pos = pos;

396 pkt->stream_index = st->index;

397

398 if (linesize * height > pkt->size) {

399 res = AVERROR_INVALIDDATA;

400 av_packet_unref(pkt);

401 goto bitmap_end;

402 }

403

404 switch (bmp_fmt) {

405 case 3:

406 pix_fmt = AV_PIX_FMT_PAL8;

407 for (i = 0; i < colormapsize; i++)

408 if (alpha_bmp) colormap[i] = buf[3]<<24 | AV_RB24(buf + 4*i);

409 else colormap[i] = 0xffU <<24 | AV_RB24(buf + 3*i);

410 pal = av_packet_new_side_data(pkt, AV_PKT_DATA_PALETTE, AVPALETTE_SIZE);

411 if (!pal) {

412 res = AVERROR(ENOMEM);

413 goto bitmap_end;

414 }

415 memcpy(pal, colormap, AVPALETTE_SIZE);

416 break;

417 case 4:

418 pix_fmt = AV_PIX_FMT_RGB555;

419 break;

420 case 5:

421 pix_fmt = alpha_bmp ? AV_PIX_FMT_ARGB : AV_PIX_FMT_0RGB;

422 break;

423 default:

424 av_assert0(0);

425 }

426 if (st->codecpar->format != AV_PIX_FMT_NONE && st->codecpar->format != pix_fmt) {

427 av_log(s, AV_LOG_ERROR, "pixel format change unsupported\n");

428 } else

429 st->codecpar->format = pix_fmt;

430

431 memcpy(pkt->data, buf + colormapsize*colormapbpp, linesize * height);

432

433 res = pkt->size;

434

435 bitmap_end:

436 av_freep(&zbuf);

437 av_freep(&buf);

438 return res;

439 bitmap_end_skip:

440 av_freep(&zbuf);

441 av_freep(&buf);

442 #else

443 av_log(s, AV_LOG_ERROR, "this file requires zlib support compiled in\n");

444 #endif

445 } else if (tag == TAG_STREAMBLOCK) {

446 for (i = 0; i < s->nb_streams; i++) {

447 st = s->streams[i];

448 if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO && st->id == -1) {

449 if (st->codecpar->codec_id == AV_CODEC_ID_MP3) {

450 avio_skip(pb, 4);

451 len -= 4;

452 if (len <= 0)

453 goto skip;

454 if ((res = av_get_packet(pb, pkt, len)) < 0)

455 return res;

456 } else { // ADPCM, PCM

457 if (len <= 0)

458 goto skip;

459 if ((res = av_get_packet(pb, pkt, len)) < 0)

460 return res;

461 }

462 pkt->pos = pos;

463 pkt->stream_index = st->index;

464 return pkt->size;

465 }

466 }

467 } else if (tag == TAG_JPEG2) {

468 for (i=0; i<s->nb_streams; i++) {

469 st = s->streams[i];

470 if (st->codecpar->codec_id == AV_CODEC_ID_MJPEG && st->id == -2)

471 break;

472 }

473 if (i == s->nb_streams) {

474 vst = avformat_new_stream(s, NULL);

475 if (!vst)

476 return AVERROR(ENOMEM);

477 vst->id = -2; /* -2 to avoid clash with video stream and audio stream */

478 vst->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;

479 vst->codecpar->codec_id = AV_CODEC_ID_MJPEG;

480 avpriv_set_pts_info(vst, 64, 256, swf->frame_rate);

481 st = vst;

482 }

483 avio_rl16(pb); /* BITMAP_ID */

484 len -= 2;

485 if (len < 4)

486 goto skip;

487 if ((res = av_new_packet(pkt, len)) < 0)

488 return res;

489 if (avio_read(pb, pkt->data, 4) != 4) {

490 av_packet_unref(pkt);

491 return AVERROR_INVALIDDATA;

492 }

493 if (AV_RB32(pkt->data) == 0xffd8ffd9 ||

494 AV_RB32(pkt->data) == 0xffd9ffd8) {

495 /* old SWF files containing SOI/EOI as data start */

496 /* files created by swink have reversed tag */

497 pkt->size -= 4;

498 memset(pkt->data+pkt->size, 0, 4);

499 res = avio_read(pb, pkt->data, pkt->size);

500 } else {

501 res = avio_read(pb, pkt->data + 4, pkt->size - 4);

502 if (res >= 0)

503 res += 4;

504 }

505 if (res != pkt->size) {

506 if (res < 0) {

507 av_packet_unref(pkt);

508 return res;

509 }

510 av_shrink_packet(pkt, res);

511 }

512

513 pkt->pos = pos;

514 pkt->stream_index = st->index;

515 return pkt->size;

516 } else {

517 av_log(s, AV_LOG_DEBUG, "Unknown tag: %d\n", tag);

518 }

519 skip:

520 if(len<0)

521 av_log(s, AV_LOG_WARNING, "Clipping len %d\n", len);

522 len = FFMAX(0, len);

523 avio_skip(pb, len);

524 }

525 }

526

527 #if CONFIG_ZLIB

528 static av_cold int swf_read_close(AVFormatContext *avctx)

529 {

530 SWFContext *s = avctx->priv_data;

531 inflateEnd(&s->zstream);

532 av_freep(&s->zbuf_in);

533 av_freep(&s->zbuf_out);

534 avio_context_free(&s->zpb);

535 return 0;

536 }

537 #endif

538

539 AVInputFormat ff_swf_demuxer = {

540 .name = "swf",

541 .long_name = NULL_IF_CONFIG_SMALL("SWF (ShockWave Flash)"),

542 .priv_data_size = sizeof(SWFContext),

543 .read_probe = swf_probe,

544 .read_header = swf_read_header,

545 .read_packet = swf_read_packet,

546 #if CONFIG_ZLIB

547 .read_close = swf_read_close,

548 #endif

549 };

ff_swf_codec_tags

const AVCodecTag ff_swf_codec_tags[]

Definition: swf.c:25

swf_probe

static int swf_probe(AVProbeData *p)

Definition: swfdec.c:64

NULL

#define NULL

Definition: coverity.c:32

const char * s

Definition: avisynth_c.h:768

AVIOContext

Bytestream IO Context.

Definition: avio.h:161

AVERROR_INVALIDDATA

#define AVERROR_INVALIDDATA

Invalid data found when processing input.

Definition: error.h:59

AV_CODEC_ID_NONE

Definition: avcodec.h:216

pix_fmt

static enum AVPixelFormat pix_fmt

Definition: demuxing_decoding.c:40

SWFContext

Definition: swf.h:123

get_swf_tag

static int get_swf_tag(AVIOContext *pb, int *len_ptr)

Definition: swfdec.c:46

AV_PIX_FMT_NONE

Definition: pixfmt.h:61

ff_codec_get_id

enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)

Definition: utils.c:3117

imgutils.h

misc image utilities

get_bits

static unsigned int get_bits(GetBitContext *s, int n)

Read 1-25 bits.

Definition: get_bits.h:269

AV_LOG_WARNING

#define AV_LOG_WARNING

Something somehow does not look correct.

Definition: log.h:182

AVPacket::pos

int64_t pos

byte position in stream, -1 if unknown

Definition: avcodec.h:1450

av_shrink_packet

void av_shrink_packet(AVPacket *pkt, int size)

Reduce packet size, correctly zeroing padding.

Definition: avpacket.c:101

TAG_STREAMHEAD

Definition: swf.h:59

avpriv_set_pts_info

void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits, unsigned int pts_num, unsigned int pts_den)

Set the time base and wrapping info for a given stream.

Definition: utils.c:4820

AVCodecParameters::codec_id

enum AVCodecID codec_id

Specific type of the encoded data (the codec used).

Definition: avcodec.h:3884

AVPacket::size

int size

Definition: avcodec.h:1431

avio_skip

int64_t avio_skip(AVIOContext *s, int64_t offset)

Skip given number of bytes forward.

Definition: aviobuf.c:331

AVInputFormat

Definition: avformat.h:642

pkt

static AVPacket pkt

Definition: demuxing_decoding.c:54

AV_CH_LAYOUT_STEREO

#define AV_CH_LAYOUT_STEREO

Definition: channel_layout.h:86

AVFormatContext::ctx_flags

int ctx_flags

Flags signalling stream properties.

Definition: avformat.h:1391

TAG_JPEG2

Definition: swf.h:62

AVFormatContext

Format I/O context.

Definition: avformat.h:1342

av_assert0

#define av_assert0(cond)

assert() equivalent, that is always enabled.

Definition: avassert.h:37

TAG_STREAMHEAD2

Definition: swf.h:76

SWFContext::frame_rate

int frame_rate

Definition: swf.h:131

config.h

uint8_t

Definition: audio_convert.c:194

av_cold

#define av_cold

Definition: attributes.h:82

av_malloc

#define av_malloc(s)

Definition: tableprint_vlc.h:31

AVCodecParameters::width

int width

Video only.

Definition: avcodec.h:3950

AVFMTCTX_NOHEADER

#define AVFMTCTX_NOHEADER

signal that no header is present (streams are added dynamically)

Definition: avformat.h:1286

AV_PIX_FMT_PAL8

8 bits with AV_PIX_FMT_RGB32 palette

Definition: pixfmt.h:73

avio_rb32

unsigned int avio_rb32(AVIOContext *s)

Definition: aviobuf.c:801

AVPALETTE_SIZE

#define AVPALETTE_SIZE

Definition: pixfmt.h:32

AVStream::need_parsing

enum AVStreamParseType need_parsing

Definition: avformat.h:1091

AVStream::id

int id

Format-specific stream ID.

Definition: avformat.h:880

TAG_STREAMBLOCK

Definition: swf.h:60

avformat_new_stream

AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)

Add a new stream to a media file.

Definition: utils.c:4450

AV_RB32

uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL AV_RB32

Definition: bytestream.h:87

AVFormatContext::streams

AVStream ** streams

A list of all streams in the file.

Definition: avformat.h:1410

AVCodecTag

Definition: internal.h:44

frame

static AVFrame * frame

Definition: demuxing_decoding.c:53

height

#define height

AVPacket::data

uint8_t * data

Definition: avcodec.h:1430

inflate

static void inflate(uint8_t *dst, const uint8_t *p1, int width, int threshold, const uint8_t *coordinates[], int coord)

Definition: vf_neighbor.c:129

tag

uint32_t tag

Definition: movenc.c:1455

ff_dlog

#define ff_dlog(a,...)

Definition: tableprint_vlc.h:29

AVERROR_EOF

#define AVERROR_EOF

End of file.

Definition: error.h:55

get_bits.h

bitstream reader API header.

read_close

static av_cold int read_close(AVFormatContext *ctx)

Definition: libcdio.c:145

av_get_packet

int av_get_packet(AVIOContext *s, AVPacket *pkt, int size)

Allocate and read the payload of a packet and initialize its fields with default values.

Definition: utils.c:310

avio_tell

static av_always_inline int64_t avio_tell(AVIOContext *s)

ftell() equivalent for AVIOContext.

Definition: avio.h:557

AV_CODEC_ID_MJPEG

Definition: avcodec.h:225

FFALIGN

#define FFALIGN(x, a)

Definition: macros.h:48

AVCodecParameters::channel_layout

uint64_t channel_layout

Audio only.

Definition: avcodec.h:3986

av_log

#define av_log(a,...)

Definition: tableprint_vlc.h:28

avio_read

int avio_read(AVIOContext *s, unsigned char *buf, int size)

Read size bytes from AVIOContext into buf.

Definition: aviobuf.c:648

#define U(x)

Definition: vp56_arith.h:37

av_new_packet

int av_new_packet(AVPacket *pkt, int size)

Allocate the payload of a packet and initialize its fields with default values.

Definition: avpacket.c:86

avio_alloc_context

AVIOContext * avio_alloc_context(unsigned char *buffer, int buffer_size, int write_flag, void *opaque, int(*read_packet)(void *opaque, uint8_t *buf, int buf_size), int(*write_packet)(void *opaque, uint8_t *buf, int buf_size), int64_t(*seek)(void *opaque, int64_t offset, int whence))

Allocate and initialize an AVIOContext for buffered I/O.

Definition: aviobuf.c:131

AV_LOG_ERROR

#define AV_LOG_ERROR

Something went wrong and cannot losslessly be recovered.

Definition: log.h:176

ff_swf_demuxer

AVInputFormat ff_swf_demuxer

Definition: swfdec.c:539

AV_PKT_DATA_PALETTE

An AV_PKT_DATA_PALETTE side data packet contains exactly AVPALETTE_SIZE bytes worth of palette...

Definition: avcodec.h:1149

avio_rl32

unsigned int avio_rl32(AVIOContext *s)

Definition: aviobuf.c:770

AVERROR

#define AVERROR(e)

Definition: error.h:43

NULL_IF_CONFIG_SMALL

#define NULL_IF_CONFIG_SMALL(x)

Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...

Definition: internal.h:186

AV_LOG_DEBUG

#define AV_LOG_DEBUG

Stuff which is only useful for libav* developers.

Definition: log.h:197

AV_CODEC_ID_MP3

preferred ID for decoding MPEG audio layer 1, 2 or 3

Definition: avcodec.h:552

AVCodecParameters::codec_type

enum AVMediaType codec_type

General type of the encoded data.

Definition: avcodec.h:3880

ff_add_param_change

int ff_add_param_change(AVPacket *pkt, int32_t channels, uint64_t channel_layout, int32_t sample_rate, int32_t width, int32_t height)

Add side data to a packet for changing parameters to the given values.

Definition: utils.c:4952

AVMEDIA_TYPE_AUDIO

Definition: avutil.h:202

width

uint16_t width

Definition: gdv.c:47

avassert.h

simple assert() macros that are a bit more flexible than ISO C assert().

FFMAX

#define FFMAX(a, b)

Definition: common.h:94

AV_PIX_FMT_ARGB

packed ARGB 8:8:8:8, 32bpp, ARGBARGB...

Definition: pixfmt.h:88

avio_r8

int avio_r8(AVIOContext *s)

Definition: aviobuf.c:639

AVProbeData::buf_size

int buf_size

Size of buf except extra allocated bytes.

Definition: avformat.h:451

AVProbeData::buf

unsigned char * buf

Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.

Definition: avformat.h:450

internal.h

common internal API header

AVFormatContext::nb_streams

unsigned int nb_streams

Number of elements in AVFormatContext.streams.

Definition: avformat.h:1398

SWFContext::samples_per_frame

int samples_per_frame

Definition: swf.h:127

av_image_check_size

int av_image_check_size(unsigned int w, unsigned int h, int log_offset, void *log_ctx)

Check if the given dimension of an image is valid, meaning that all bytes of the image can be address...

Definition: imgutils.c:282

channel_layout.h

audio channel layout utility functions

swf_audio_codec_tags

static const AVCodecTag swf_audio_codec_tags[]

Definition: swfdec.c:37

read_probe

static int read_probe(AVProbeData *pd)

Definition: jvdec.c:55

intreadwrite.h

swf.h

TAG_DEFINEBITSLOSSLESS2

Definition: swf.h:72

int n

Definition: avisynth_c.h:684

create_new_audio_stream

static AVStream * create_new_audio_stream(AVFormatContext *s, int id, int info)

Definition: swfdec.c:176

swf_read_header

static int swf_read_header(AVFormatContext *s)

Definition: swfdec.c:134

TAG_DEFINESOUND

Definition: swf.h:56

read_header

static int read_header(FFV1Context *f)

Definition: ffv1dec.c:530

AVStream

Stream structure.

Definition: avformat.h:873

AV_CODEC_ID_PCM_U8

Definition: avcodec.h:457

read_packet

static int read_packet(void *opaque, uint8_t *buf, int buf_size)

Definition: avio_reading.c:42

AV_LOG_INFO

#define AV_LOG_INFO

Standard information.

Definition: log.h:187

AV_RB24

uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL AV_WB32 unsigned int_TMPL AV_RB24

Definition: bytestream.h:87

AVFormatContext::pb

AVIOContext * pb

I/O context.

Definition: avformat.h:1384

init_get_bits8

static int init_get_bits8(GetBitContext *s, const uint8_t *buffer, int byte_size)

Initialize GetBitContext.

Definition: get_bits.h:464

av_packet_unref

void av_packet_unref(AVPacket *pkt)

Wipe the packet.