FFmpeg: libavcodec/libopenjpegdec.c Source File

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libavcodec

libopenjpegdec.c

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1 /*

2 * JPEG 2000 decoding support via OpenJPEG

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 /**

23 * @file

24 * JPEG 2000 decoder using libopenjpeg

25 */

27 #define OPJ_STATIC

29 #include "libavutil/common.h"

30 #include "libavutil/imgutils.h"

31 #include "libavutil/intreadwrite.h"

32 #include "libavutil/opt.h"

33 #include "libavutil/pixfmt.h"

35 #include "avcodec.h"

36 #include "internal.h"

37 #include "thread.h"

39 #if HAVE_OPENJPEG_2_1_OPENJPEG_H

40 # include <openjpeg-2.1/openjpeg.h>

41 #elif HAVE_OPENJPEG_2_0_OPENJPEG_H

42 # include <openjpeg-2.0/openjpeg.h>

43 #elif HAVE_OPENJPEG_1_5_OPENJPEG_H

44 # include <openjpeg-1.5/openjpeg.h>

45 #else

46 # include <openjpeg.h>

47 #endif

49 #if HAVE_OPENJPEG_2_1_OPENJPEG_H || HAVE_OPENJPEG_2_0_OPENJPEG_H

50 # define OPENJPEG_MAJOR_VERSION 2

51 # define OPJ(x) OPJ_##x

52 #else

53 # define OPENJPEG_MAJOR_VERSION 1

54 # define OPJ(x) x

55 #endif

57 #define JP2_SIG_TYPE 0x6A502020

58 #define JP2_SIG_VALUE 0x0D0A870A

60 // pix_fmts with lower bpp have to be listed before

61 // similar pix_fmts with higher bpp.

62 #define RGB_PIXEL_FORMATS AV_PIX_FMT_RGB24, AV_PIX_FMT_RGBA, \

63 AV_PIX_FMT_RGB48, AV_PIX_FMT_RGBA64

65 #define GRAY_PIXEL_FORMATS AV_PIX_FMT_GRAY8, AV_PIX_FMT_YA8, \

66 AV_PIX_FMT_GRAY16, AV_PIX_FMT_YA16

68 #define YUV_PIXEL_FORMATS AV_PIX_FMT_YUV410P, AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUVA420P, \

69 AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUVA422P, \

70 AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUVA444P, \

71 AV_PIX_FMT_YUV420P9, AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV444P9, \

72 AV_PIX_FMT_YUVA420P9, AV_PIX_FMT_YUVA422P9, AV_PIX_FMT_YUVA444P9, \

73 AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV444P10, \

74 AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA444P10, \

75 AV_PIX_FMT_YUV420P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV444P12, \

76 AV_PIX_FMT_YUV420P14, AV_PIX_FMT_YUV422P14, AV_PIX_FMT_YUV444P14, \

77 AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16, \

78 AV_PIX_FMT_YUVA420P16, AV_PIX_FMT_YUVA422P16, AV_PIX_FMT_YUVA444P16

80 #define XYZ_PIXEL_FORMATS AV_PIX_FMT_XYZ12

82 static const enum AVPixelFormat libopenjpeg_rgb_pix_fmts[] = {

83 RGB_PIXEL_FORMATS

84 };

85 static const enum AVPixelFormat libopenjpeg_gray_pix_fmts[] = {

86 GRAY_PIXEL_FORMATS

87 };

88 static const enum AVPixelFormat libopenjpeg_yuv_pix_fmts[] = {

89 YUV_PIXEL_FORMATS

90 };

91 static const enum AVPixelFormat libopenjpeg_all_pix_fmts[] = {

92 RGB_PIXEL_FORMATS, GRAY_PIXEL_FORMATS, YUV_PIXEL_FORMATS, XYZ_PIXEL_FORMATS

93 };

95 typedef struct LibOpenJPEGContext {

96 AVClass *class;

97 opj_dparameters_t dec_params;

98 #if OPENJPEG_MAJOR_VERSION == 1

99 opj_event_mgr_t event_mgr;

100 #endif // OPENJPEG_MAJOR_VERSION == 1

101 int lowqual;

102 } LibOpenJPEGContext;

103

104 static void error_callback(const char *msg, void *data)

105 {

106 av_log(data, AV_LOG_ERROR, "%s", msg);

107 }

108

109 static void warning_callback(const char *msg, void *data)

110 {

111 av_log(data, AV_LOG_WARNING, "%s", msg);

112 }

113

114 static void info_callback(const char *msg, void *data)

115 {

116 av_log(data, AV_LOG_DEBUG, "%s", msg);

117 }

118

119 #if OPENJPEG_MAJOR_VERSION == 2

120 typedef struct BufferReader {

121 int pos;

122 int size;

123 const uint8_t *buffer;

124 } BufferReader;

125

126 static OPJ_SIZE_T stream_read(void *out_buffer, OPJ_SIZE_T nb_bytes, void *user_data)

127 {

128 BufferReader *reader = user_data;

129 if (reader->pos == reader->size) {

130 return (OPJ_SIZE_T)-1;

131 }

132 int remaining = reader->size - reader->pos;

133 if (nb_bytes > remaining) {

134 nb_bytes = remaining;

135 }

136 memcpy(out_buffer, reader->buffer + reader->pos, nb_bytes);

137 reader->pos += (int)nb_bytes;

138 return nb_bytes;

139 }

140

141 static OPJ_OFF_T stream_skip(OPJ_OFF_T nb_bytes, void *user_data)

142 {

143 BufferReader *reader = user_data;

144 if (nb_bytes < 0) {

145 if (reader->pos == 0) {

146 return (OPJ_SIZE_T)-1;

147 }

148 if (nb_bytes + reader->pos < 0) {

149 nb_bytes = -reader->pos;

150 }

151 } else {

152 if (reader->pos == reader->size) {

153 return (OPJ_SIZE_T)-1;

154 }

155 int remaining = reader->size - reader->pos;

156 if (nb_bytes > remaining) {

157 nb_bytes = remaining;

158 }

159 }

160 reader->pos += (int)nb_bytes;

161 return nb_bytes;

162 }

163

164 static OPJ_BOOL stream_seek(OPJ_OFF_T nb_bytes, void *user_data)

165 {

166 BufferReader *reader = user_data;

167 if (nb_bytes < 0 || nb_bytes > reader->size) {

168 return OPJ_FALSE;

169 }

170 reader->pos = (int)nb_bytes;

171 return OPJ_TRUE;

172 }

173 #endif // OPENJPEG_MAJOR_VERSION == 2

174

175 static inline int libopenjpeg_matches_pix_fmt(const opj_image_t *image, enum AVPixelFormat pix_fmt)

176 {

177 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);

178 int match = 1;

179

180 if (desc->nb_components != image->numcomps) {

181 return 0;

182 }

183

184 switch (desc->nb_components) {

185 case 4:

186 match = match &&

187 desc->comp[3].depth >= image->comps[3].prec &&

188 1 == image->comps[3].dx &&

189 1 == image->comps[3].dy;

190 case 3:

191 match = match &&

192 desc->comp[2].depth >= image->comps[2].prec &&

193 1 << desc->log2_chroma_w == image->comps[2].dx &&

194 1 << desc->log2_chroma_h == image->comps[2].dy;

195 case 2:

196 match = match &&

197 desc->comp[1].depth >= image->comps[1].prec &&

198 1 << desc->log2_chroma_w == image->comps[1].dx &&

199 1 << desc->log2_chroma_h == image->comps[1].dy;

200 case 1:

201 match = match &&

202 desc->comp[0].depth >= image->comps[0].prec &&

203 1 == image->comps[0].dx &&

204 1 == image->comps[0].dy;

205 default:

206 break;

207 }

208

209 return match;

210 }

211

212 static inline enum AVPixelFormat libopenjpeg_guess_pix_fmt(const opj_image_t *image) {

213 int index;

214 const enum AVPixelFormat *possible_fmts = NULL;

215 int possible_fmts_nb = 0;

216

217 switch (image->color_space) {

218 case OPJ(CLRSPC_SRGB):

219 possible_fmts = libopenjpeg_rgb_pix_fmts;

220 possible_fmts_nb = FF_ARRAY_ELEMS(libopenjpeg_rgb_pix_fmts);

221 break;

222 case OPJ(CLRSPC_GRAY):

223 possible_fmts = libopenjpeg_gray_pix_fmts;

224 possible_fmts_nb = FF_ARRAY_ELEMS(libopenjpeg_gray_pix_fmts);

225 break;

226 case OPJ(CLRSPC_SYCC):

227 possible_fmts = libopenjpeg_yuv_pix_fmts;

228 possible_fmts_nb = FF_ARRAY_ELEMS(libopenjpeg_yuv_pix_fmts);

229 break;

230 default:

231 possible_fmts = libopenjpeg_all_pix_fmts;

232 possible_fmts_nb = FF_ARRAY_ELEMS(libopenjpeg_all_pix_fmts);

233 break;

234 }

235

236 for (index = 0; index < possible_fmts_nb; ++index)

237 if (libopenjpeg_matches_pix_fmt(image, possible_fmts[index])) {

238 return possible_fmts[index];

239 }

240

241 return AV_PIX_FMT_NONE;

242 }

243

244 static inline int libopenjpeg_ispacked(enum AVPixelFormat pix_fmt)

245 {

246 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);

247 int i, component_plane;

248

249 if (pix_fmt == AV_PIX_FMT_GRAY16)

250 return 0;

251

252 component_plane = desc->comp[0].plane;

253 for (i = 1; i < desc->nb_components; i++)

254 if (component_plane != desc->comp[i].plane)

255 return 0;

256 return 1;

257 }

258

259 static inline void libopenjpeg_copy_to_packed8(AVFrame *picture, opj_image_t *image) {

260 uint8_t *img_ptr;

261 int index, x, y, c;

262 for (y = 0; y < picture->height; y++) {

263 index = y * picture->width;

264 img_ptr = picture->data[0] + y * picture->linesize[0];

265 for (x = 0; x < picture->width; x++, index++)

266 for (c = 0; c < image->numcomps; c++)

267 *img_ptr++ = 0x80 * image->comps[c].sgnd + image->comps[c].data[index];

268 }

269 }

270

271 static inline void libopenjpeg_copy_to_packed16(AVFrame *picture, opj_image_t *image) {

272 uint16_t *img_ptr;

273 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(picture->format);

274 int index, x, y, c;

275 int adjust[4];

276 for (x = 0; x < image->numcomps; x++)

277 adjust[x] = FFMAX(FFMIN(desc->comp[x].depth - image->comps[x].prec, 8), 0) + desc->comp[x].shift;

278

279 for (y = 0; y < picture->height; y++) {

280 index = y * picture->width;

281 img_ptr = (uint16_t *) (picture->data[0] + y * picture->linesize[0]);

282 for (x = 0; x < picture->width; x++, index++)

283 for (c = 0; c < image->numcomps; c++)

284 *img_ptr++ = (1 << image->comps[c].prec - 1) * image->comps[c].sgnd +

285 (unsigned)image->comps[c].data[index] << adjust[c];

286 }

287 }

288

289 static inline void libopenjpeg_copyto8(AVFrame *picture, opj_image_t *image) {

290 int *comp_data;

291 uint8_t *img_ptr;

292 int index, x, y;

293

294 for (index = 0; index < image->numcomps; index++) {

295 comp_data = image->comps[index].data;

296 for (y = 0; y < image->comps[index].h; y++) {

297 img_ptr = picture->data[index] + y * picture->linesize[index];

298 for (x = 0; x < image->comps[index].w; x++) {

299 *img_ptr = 0x80 * image->comps[index].sgnd + *comp_data;

300 img_ptr++;

301 comp_data++;

302 }

303 }

304 }

305 }

306

307 static inline void libopenjpeg_copyto16(AVFrame *picture, opj_image_t *image) {

308 int *comp_data;

309 uint16_t *img_ptr;

310 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(picture->format);

311 int index, x, y;

312 int adjust[4];

313 for (x = 0; x < image->numcomps; x++)

314 adjust[x] = FFMAX(FFMIN(desc->comp[x].depth - image->comps[x].prec, 8), 0) + desc->comp[x].shift;

315

316 for (index = 0; index < image->numcomps; index++) {

317 comp_data = image->comps[index].data;

318 for (y = 0; y < image->comps[index].h; y++) {

319 img_ptr = (uint16_t *)(picture->data[index] + y * picture->linesize[index]);

320 for (x = 0; x < image->comps[index].w; x++) {

321 *img_ptr = (1 << image->comps[index].prec - 1) * image->comps[index].sgnd +

322 (unsigned)*comp_data << adjust[index];

323 img_ptr++;

324 comp_data++;

325 }

326 }

327 }

328 }

329

330 static av_cold int libopenjpeg_decode_init(AVCodecContext *avctx)

331 {

332 LibOpenJPEGContext *ctx = avctx->priv_data;

333

334 opj_set_default_decoder_parameters(&ctx->dec_params);

335 return 0;

336 }

337

338 static int libopenjpeg_decode_frame(AVCodecContext *avctx,

339 void *data, int *got_frame,

340 AVPacket *avpkt)

341 {

342 uint8_t *buf = avpkt->data;

343 int buf_size = avpkt->size;

344 LibOpenJPEGContext *ctx = avctx->priv_data;

345 ThreadFrame frame = { .f = data };

346 AVFrame *picture = data;

347 const AVPixFmtDescriptor *desc;

348 int width, height, ret;

349 int pixel_size = 0;

350 int ispacked = 0;

351 int i;

352 opj_image_t *image = NULL;

353 #if OPENJPEG_MAJOR_VERSION == 1

354 opj_dinfo_t *dec = NULL;

355 opj_cio_t *stream = NULL;

356 #else // OPENJPEG_MAJOR_VERSION == 2

357 BufferReader reader = {0, avpkt->size, avpkt->data};

358 opj_codec_t *dec = NULL;

359 opj_stream_t *stream = NULL;

360 #endif // OPENJPEG_MAJOR_VERSION == 1

361

362 *got_frame = 0;

363

364 // Check if input is a raw jpeg2k codestream or in jp2 wrapping

365 if ((AV_RB32(buf) == 12) &&

366 (AV_RB32(buf + 4) == JP2_SIG_TYPE) &&

367 (AV_RB32(buf + 8) == JP2_SIG_VALUE)) {

368 dec = opj_create_decompress(OPJ(CODEC_JP2));

369 } else {

370 /* If the AVPacket contains a jp2c box, then skip to

371 * the starting byte of the codestream. */

372 if (AV_RB32(buf + 4) == AV_RB32("jp2c"))

373 buf += 8;

374 dec = opj_create_decompress(OPJ(CODEC_J2K));

375 }

376

377 if (!dec) {

378 av_log(avctx, AV_LOG_ERROR, "Error initializing decoder.\n");

379 ret = AVERROR_EXTERNAL;

380 goto done;

381 }

382

383 #if OPENJPEG_MAJOR_VERSION == 1

384 memset(&ctx->event_mgr, 0, sizeof(ctx->event_mgr));

385 ctx->event_mgr.info_handler = info_callback;

386 ctx->event_mgr.error_handler = error_callback;

387 ctx->event_mgr.warning_handler = warning_callback;

388 opj_set_event_mgr((opj_common_ptr) dec, &ctx->event_mgr, avctx);

389 ctx->dec_params.cp_limit_decoding = LIMIT_TO_MAIN_HEADER;

390 ctx->dec_params.cp_layer = ctx->lowqual;

391 #else // OPENJPEG_MAJOR_VERSION == 2

392 if (!opj_set_error_handler(dec, error_callback, avctx) ||

393 !opj_set_warning_handler(dec, warning_callback, avctx) ||

394 !opj_set_info_handler(dec, info_callback, avctx)) {

395 av_log(avctx, AV_LOG_ERROR, "Error setting decoder handlers.\n");

396 ret = AVERROR_EXTERNAL;

397 goto done;

398 }

399

400 ctx->dec_params.cp_layer = ctx->lowqual;

401 ctx->dec_params.cp_reduce = avctx->lowres;

402 #endif // OPENJPEG_MAJOR_VERSION == 1

403

404 // Tie decoder with decoding parameters

405 opj_setup_decoder(dec, &ctx->dec_params);

406

407 #if OPENJPEG_MAJOR_VERSION == 1

408 stream = opj_cio_open((opj_common_ptr) dec, buf, buf_size);

409 #else // OPENJPEG_MAJOR_VERSION == 2

410 stream = opj_stream_default_create(OPJ_STREAM_READ);

411 #endif // OPENJPEG_MAJOR_VERSION == 1

412

413 if (!stream) {

414 av_log(avctx, AV_LOG_ERROR,

415 "Codestream could not be opened for reading.\n");

416 ret = AVERROR_EXTERNAL;

417 goto done;

418 }

419

420 #if OPENJPEG_MAJOR_VERSION == 1

421 // Decode the header only.

422 image = opj_decode_with_info(dec, stream, NULL);

423 opj_cio_close(stream);

424 stream = NULL;

425 ret = !image;

426 #else // OPENJPEG_MAJOR_VERSION == 2

427 opj_stream_set_read_function(stream, stream_read);

428 opj_stream_set_skip_function(stream, stream_skip);

429 opj_stream_set_seek_function(stream, stream_seek);

430 #if HAVE_OPENJPEG_2_1_OPENJPEG_H

431 opj_stream_set_user_data(stream, &reader, NULL);

432 #elif HAVE_OPENJPEG_2_0_OPENJPEG_H

433 opj_stream_set_user_data(stream, &reader);

434 #else

435 #error Missing call to opj_stream_set_user_data

436 #endif

437 opj_stream_set_user_data_length(stream, avpkt->size);

438 // Decode the header only.

439 ret = !opj_read_header(stream, dec, &image);

440 #endif // OPENJPEG_MAJOR_VERSION == 1

441

442 if (ret) {

443 av_log(avctx, AV_LOG_ERROR, "Error decoding codestream header.\n");

444 ret = AVERROR_EXTERNAL;

445 goto done;

446 }

447

448 width = image->x1 - image->x0;

449 height = image->y1 - image->y0;

450

451 ret = ff_set_dimensions(avctx, width, height);

452 if (ret < 0)

453 goto done;

454

455 if (avctx->pix_fmt != AV_PIX_FMT_NONE)

456 if (!libopenjpeg_matches_pix_fmt(image, avctx->pix_fmt))

457 avctx->pix_fmt = AV_PIX_FMT_NONE;

458

459 if (avctx->pix_fmt == AV_PIX_FMT_NONE)

460 avctx->pix_fmt = libopenjpeg_guess_pix_fmt(image);

461

462 if (avctx->pix_fmt == AV_PIX_FMT_NONE) {

463 av_log(avctx, AV_LOG_ERROR, "Unable to determine pixel format.\n");

464 ret = AVERROR_UNKNOWN;

465 goto done;

466 }

467 for (i = 0; i < image->numcomps; i++)

468 if (image->comps[i].prec > avctx->bits_per_raw_sample)

469 avctx->bits_per_raw_sample = image->comps[i].prec;

470

471 if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0)

472 goto done;

473

474 #if OPENJPEG_MAJOR_VERSION == 1

475 ctx->dec_params.cp_limit_decoding = NO_LIMITATION;

476 ctx->dec_params.cp_reduce = avctx->lowres;

477 // Tie decoder with decoding parameters.

478 opj_setup_decoder(dec, &ctx->dec_params);

479 stream = opj_cio_open((opj_common_ptr) dec, buf, buf_size);

480 if (!stream) {

481 av_log(avctx, AV_LOG_ERROR,

482 "Codestream could not be opened for reading.\n");

483 ret = AVERROR_EXTERNAL;

484 goto done;

485 }

486 opj_image_destroy(image);

487 // Decode the codestream

488 image = opj_decode_with_info(dec, stream, NULL);

489 ret = !image;

490 #else // OPENJPEG_MAJOR_VERSION == 2

491 ret = !opj_decode(dec, stream, image);

492 #endif // OPENJPEG_MAJOR_VERSION == 1

493

494 if (ret) {

495 av_log(avctx, AV_LOG_ERROR, "Error decoding codestream.\n");

496 ret = AVERROR_EXTERNAL;

497 goto done;

498 }

499

500 for (i = 0; i < image->numcomps; i++) {

501 if (!image->comps[i].data) {

502 av_log(avctx, AV_LOG_ERROR,

503 "Image component %d contains no data.\n", i);

504 ret = AVERROR_INVALIDDATA;

505 goto done;

506 }

507 }

508

509 desc = av_pix_fmt_desc_get(avctx->pix_fmt);

510 pixel_size = desc->comp[0].step;

511 ispacked = libopenjpeg_ispacked(avctx->pix_fmt);

512

513 switch (pixel_size) {

514 case 1:

515 if (ispacked) {

516 libopenjpeg_copy_to_packed8(picture, image);

517 } else {

518 libopenjpeg_copyto8(picture, image);

519 }

520 break;

521 case 2:

522 if (ispacked) {

523 libopenjpeg_copy_to_packed8(picture, image);

524 } else {

525 libopenjpeg_copyto16(picture, image);

526 }

527 break;

528 case 3:

529 case 4:

530 if (ispacked) {

531 libopenjpeg_copy_to_packed8(picture, image);

532 }

533 break;

534 case 6:

535 case 8:

536 if (ispacked) {

537 libopenjpeg_copy_to_packed16(picture, image);

538 }

539 break;

540 default:

541 av_log(avctx, AV_LOG_ERROR, "unsupported pixel size %d\n", pixel_size);

542 ret = AVERROR_PATCHWELCOME;

543 goto done;

544 }

545

546 *got_frame = 1;

547 ret = buf_size;

548

549 done:

550 opj_image_destroy(image);

551 #if OPENJPEG_MAJOR_VERSION == 2

552 opj_stream_destroy(stream);

553 opj_destroy_codec(dec);

554 #else

555 opj_cio_close(stream);

556 opj_destroy_decompress(dec);

557 #endif

558 return ret;

559 }

560

561 static av_cold void libopenjpeg_static_init(AVCodec *codec)

562 {

563 const char *version = opj_version();

564 int major, minor;

565

566 if (sscanf(version, "%d.%d", &major, &minor) == 2 && 1000*major + minor <= 1003)

567 codec->capabilities |= AV_CODEC_CAP_EXPERIMENTAL;

568 }

569

570 #define OFFSET(x) offsetof(LibOpenJPEGContext, x)

571 #define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM

572

573 static const AVOption options[] = {

574 { "lowqual", "Limit the number of layers used for decoding",

575 OFFSET(lowqual), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, VD },

576 { NULL },

577 };

578

579 static const AVClass openjpeg_class = {

580 .class_name = "libopenjpeg",

581 .item_name = av_default_item_name,

582 .option = options,

583 .version = LIBAVUTIL_VERSION_INT,

584 };

585

586 AVCodec ff_libopenjpeg_decoder = {

587 .name = "libopenjpeg",

588 .long_name = NULL_IF_CONFIG_SMALL("OpenJPEG JPEG 2000"),

589 .type = AVMEDIA_TYPE_VIDEO,

590 .id = AV_CODEC_ID_JPEG2000,

591 .priv_data_size = sizeof(LibOpenJPEGContext),

592 .init = libopenjpeg_decode_init,

593 .decode = libopenjpeg_decode_frame,

594 .capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_FRAME_THREADS,

595 .max_lowres = 31,

596 .priv_class = &openjpeg_class,

597 .init_static_data = libopenjpeg_static_init,

598 };

libopenjpeg_copy_to_packed16

static void libopenjpeg_copy_to_packed16(AVFrame *picture, opj_image_t *image)

Definition: libopenjpegdec.c:271

AVComponentDescriptor::plane

int plane

Which of the 4 planes contains the component.

Definition: pixdesc.h:35

libopenjpeg_decode_frame

static int libopenjpeg_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)

Definition: libopenjpegdec.c:338

NULL

#define NULL

Definition: coverity.c:32

AVERROR_INVALIDDATA

#define AVERROR_INVALIDDATA

Invalid data found when processing input.

Definition: error.h:59

pix_fmt

static enum AVPixelFormat pix_fmt

Definition: demuxing_decoding.c:40

libopenjpeg_ispacked

static int libopenjpeg_ispacked(enum AVPixelFormat pix_fmt)

Definition: libopenjpegdec.c:244

av_pix_fmt_desc_get

const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)

Definition: pixdesc.c:2157

AVFrame

This structure describes decoded (raw) audio or video data.

Definition: frame.h:181

AV_PIX_FMT_NONE

Definition: pixfmt.h:62

AVOption

AVOption.

Definition: opt.h:245

data

ptrdiff_t const GLvoid * data

Definition: opengl_enc.c:101

ctx

AVFormatContext * ctx

Definition: movenc-test.c:48

imgutils.h

misc image utilities

AV_LOG_WARNING

#define AV_LOG_WARNING

Something somehow does not look correct.

Definition: log.h:182

LIBAVUTIL_VERSION_INT

#define LIBAVUTIL_VERSION_INT

Definition: version.h:70

ff_set_dimensions

int ff_set_dimensions(AVCodecContext *s, int width, int height)

Check that the provided frame dimensions are valid and set them on the codec context.

Definition: utils.c:209

init

static av_cold int init(AVCodecContext *avctx)

Definition: avrndec.c:35

AV_OPT_TYPE_INT

Definition: opt.h:223

AVPacket::size

int size

Definition: avcodec.h:1468

stream_seek

static void stream_seek(VideoState *is, int64_t pos, int64_t rel, int seek_by_bytes)

Definition: ffplay.c:1411

AVCodecContext::pix_fmt

enum AVPixelFormat pix_fmt

Pixel format, see AV_PIX_FMT_xxx.

Definition: avcodec.h:1752

AV_CODEC_CAP_EXPERIMENTAL

#define AV_CODEC_CAP_EXPERIMENTAL

Codec is experimental and is thus avoided in favor of non experimental encoders.

Definition: avcodec.h:911

version

int version

Definition: avisynth_c.h:629

openjpeg_class

static const AVClass openjpeg_class

Definition: libopenjpegdec.c:579

AVCodecContext::bits_per_raw_sample

int bits_per_raw_sample

Bits per sample/pixel of internal libavcodec pixel/sample format.

Definition: avcodec.h:2924

libopenjpeg_gray_pix_fmts

static enum AVPixelFormat libopenjpeg_gray_pix_fmts[]

Definition: libopenjpegdec.c:85

JP2_SIG_TYPE

#define JP2_SIG_TYPE

Definition: libopenjpegdec.c:57

AVCodec

AVCodec.

Definition: avcodec.h:3392

AVPixFmtDescriptor::log2_chroma_w

uint8_t log2_chroma_w

Amount to shift the luma width right to find the chroma width.

Definition: pixdesc.h:92

AVClass::class_name

const char * class_name

The name of the class; usually it is the same name as the context structure type to which the AVClass...

Definition: log.h:72

AVPixFmtDescriptor::comp

AVComponentDescriptor comp[4]

Parameters that describe how pixels are packed.

Definition: pixdesc.h:117

uint8_t

Definition: audio_convert.c:194

av_cold

#define av_cold

Definition: attributes.h:82

opt.h

AVOptions.

XYZ_PIXEL_FORMATS

#define XYZ_PIXEL_FORMATS

Definition: libopenjpegdec.c:80

thread.h

Multithreading support functions.

warning_callback

static void warning_callback(const char *msg, void *data)

Definition: libopenjpegdec.c:109

libopenjpeg_decode_init

static av_cold int libopenjpeg_decode_init(AVCodecContext *avctx)

Definition: libopenjpegdec.c:330

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

init_static_data

static av_cold void init_static_data(void)

Definition: dsddec.c:82

frame

static AVFrame * frame

Definition: demuxing_decoding.c:53

AVPacket::data

uint8_t * data

Definition: avcodec.h:1467

AVCodecContext::lowres

int lowres

low resolution decoding, 1-> 1/2 size, 2->1/4 size

Definition: avcodec.h:2934

size

ptrdiff_t size

Definition: opengl_enc.c:101

libopenjpeg_copyto8

static void libopenjpeg_copyto8(AVFrame *picture, opj_image_t *image)

Definition: libopenjpegdec.c:289

YUV_PIXEL_FORMATS

#define YUV_PIXEL_FORMATS

Definition: libopenjpegdec.c:68

av_log

#define av_log(a,...)

Definition: tableprint_vlc.h:28

libopenjpeg_copyto16

static void libopenjpeg_copyto16(AVFrame *picture, opj_image_t *image)

Definition: libopenjpegdec.c:307

JP2_SIG_VALUE

#define JP2_SIG_VALUE

Definition: libopenjpegdec.c:58

AVFrame::width

int width

width and height of the video frame

Definition: frame.h:230

AV_LOG_ERROR

#define AV_LOG_ERROR

Something went wrong and cannot losslessly be recovered.

Definition: log.h:176

AVPixFmtDescriptor::log2_chroma_h

uint8_t log2_chroma_h

Amount to shift the luma height right to find the chroma height.

Definition: pixdesc.h:101

av_default_item_name

Definition: libopenh264enc.c:68

CODEC_J2K

#define CODEC_J2K

Definition: j2kenc.c:42

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:176

user_data

AVS_Value void * user_data

Definition: avisynth_c.h:562

AVCodec::capabilities

int capabilities

Codec capabilities.

Definition: avcodec.h:3411

libopenjpeg_all_pix_fmts

static enum AVPixelFormat libopenjpeg_all_pix_fmts[]

Definition: libopenjpegdec.c:91

AV_LOG_DEBUG

#define AV_LOG_DEBUG

Stuff which is only useful for libav* developers.

Definition: log.h:197

normalize.adjust

tuple adjust

Definition: normalize.py:25

AVCodec::name

const char * name

Name of the codec implementation.

Definition: avcodec.h:3399

FFMAX

#define FFMAX(a, b)

Definition: common.h:94

AV_CODEC_CAP_FRAME_THREADS

#define AV_CODEC_CAP_FRAME_THREADS

Codec supports frame-level multithreading.

Definition: avcodec.h:919

libopenjpeg_copy_to_packed8

static void libopenjpeg_copy_to_packed8(AVFrame *picture, opj_image_t *image)

Definition: libopenjpegdec.c:259

RGB_PIXEL_FORMATS

#define RGB_PIXEL_FORMATS

Definition: libopenjpegdec.c:62

AVPixFmtDescriptor::nb_components

uint8_t nb_components

The number of components each pixel has, (1-4)

Definition: pixdesc.h:83

AV_PIX_FMT_GRAY16

#define AV_PIX_FMT_GRAY16

Definition: pixfmt.h:314

FFMIN

#define FFMIN(a, b)

Definition: common.h:96

intreadwrite.h

libopenjpeg_yuv_pix_fmts

static enum AVPixelFormat libopenjpeg_yuv_pix_fmts[]

Definition: libopenjpegdec.c:88

CODEC_JP2

#define CODEC_JP2

Definition: j2kenc.c:41

ThreadFrame

Definition: thread.h:35

LibOpenJPEGContext

Definition: libopenjpegdec.c:95

FF_ARRAY_ELEMS

#define FF_ARRAY_ELEMS(a)

Definition: sinewin_tablegen_template.c:36

AVERROR_PATCHWELCOME

#define AVERROR_PATCHWELCOME

Not yet implemented in FFmpeg, patches welcome.

Definition: error.h:62

AVFrame::format

int format

format of the frame, -1 if unknown or unset Values correspond to enum AVPixelFormat for video frames...

Definition: frame.h:242

avcodec.h

Libavcodec external API header.

AVFrame::linesize

int linesize[AV_NUM_DATA_POINTERS]

For video, size in bytes of each picture line.

Definition: frame.h:209

AVPixFmtDescriptor

Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...

Definition: pixdesc.h:81

ff_thread_get_buffer

int ff_thread_get_buffer(AVCodecContext *avctx, ThreadFrame *f, int flags)

Wrapper around get_buffer() for frame-multithreaded codecs.

Definition: pthread_frame.c:843

AVCodecContext

main external API structure.

Definition: avcodec.h:1532

buf

void * buf

Definition: avisynth_c.h:553

height

BYTE int const BYTE int int int height

Definition: avisynth_c.h:676

AVClass

Describe the class of an AVClass context structure.

Definition: log.h:67

libopenjpeg_guess_pix_fmt

static enum AVPixelFormat libopenjpeg_guess_pix_fmt(const opj_image_t *image)

Definition: libopenjpegdec.c:212

LibOpenJPEGContext::event_mgr

opj_event_mgr_t event_mgr

Definition: libopenjpegdec.c:99

index

int index

Definition: gxfenc.c:89

libopenjpeg_rgb_pix_fmts

static enum AVPixelFormat libopenjpeg_rgb_pix_fmts[]

Definition: libopenjpegdec.c:82

#define VD

Definition: libopenjpegdec.c:571

OPJ

#define OPJ(x)

Definition: libopenjpegdec.c:54

AVComponentDescriptor::shift

int shift

Number of least significant bits that must be shifted away to get the value.

Definition: pixdesc.h:53

libopenjpeg_static_init

static av_cold void libopenjpeg_static_init(AVCodec *codec)

Definition: libopenjpegdec.c:561

info_callback

static void info_callback(const char *msg, void *data)

Definition: libopenjpegdec.c:114

AV_CODEC_ID_JPEG2000

Definition: avcodec.h:195

AVFrame::data

uint8_t * data[AV_NUM_DATA_POINTERS]

pointer to the picture/channel planes.

Definition: frame.h:192

decode

static int decode(AVCodecContext *avctx, void *data, int *got_sub, AVPacket *avpkt)

Definition: ccaption_dec.c:572

internal.h

common internal api header.

common.h

common internal and external API header

libopenjpeg_matches_pix_fmt

static int libopenjpeg_matches_pix_fmt(const opj_image_t *image, enum AVPixelFormat pix_fmt)

Definition: libopenjpegdec.c:175

static double c[64]

Definition: vsrc_mptestsrc.c:87

AVERROR_UNKNOWN

#define AVERROR_UNKNOWN

Unknown error, typically from an external library.

Definition: error.h:71

AVCodecContext::priv_data

void * priv_data

Definition: avcodec.h:1574

LibOpenJPEGContext::lowqual

int lowqual

Definition: libopenjpegdec.c:101

pixfmt.h

pixel format definitions

options

static const AVOption options[]

Definition: libopenjpegdec.c:573

error_callback

static void error_callback(const char *msg, void *data)

Definition: libopenjpegdec.c:104

LibOpenJPEGContext::dec_params

opj_dparameters_t dec_params

Definition: libopenjpegdec.c:97

AVFrame::height

int height

Definition: frame.h:230

AVMEDIA_TYPE_VIDEO

Definition: avutil.h:193

ff_libopenjpeg_decoder

AVCodec ff_libopenjpeg_decoder

Definition: libopenjpegdec.c:586

OFFSET

#define OFFSET(x)

Definition: libopenjpegdec.c:570

AVComponentDescriptor::depth

int depth

Number of bits in the component.

Definition: pixdesc.h:58

AVERROR_EXTERNAL

#define AVERROR_EXTERNAL

Generic error in an external library.

Definition: error.h:57

AVPixelFormat

Pixel format.

Definition: pixfmt.h:61

AVPacket

This structure stores compressed data.

Definition: avcodec.h:1444

AV_CODEC_CAP_DR1

#define AV_CODEC_CAP_DR1

Codec uses get_buffer() for allocating buffers and supports custom allocators.

Definition: avcodec.h:856

buffer

GLuint buffer

Definition: opengl_enc.c:102

AVComponentDescriptor::step

int step

Number of elements between 2 horizontally consecutive pixels.

Definition: pixdesc.h:41

GRAY_PIXEL_FORMATS

#define GRAY_PIXEL_FORMATS

Definition: libopenjpegdec.c:65

width

static int width

Definition: demuxing_decoding.c:39

Generated on Mon Feb 15 2016 15:20:39 for FFmpeg by doxygen 1.8.6