FFmpeg: libavcodec/libopenjpegdec.c Source File

FFmpeg

[フレーム]

libavcodec

libopenjpegdec.c

Go to the documentation of this file.

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/intreadwrite.h"

31 #include "libavutil/imgutils.h"

32 #include "libavutil/pixfmt.h"

33 #include "libavutil/opt.h"

34 #include "avcodec.h"

35 #include "thread.h"

37 #if HAVE_OPENJPEG_1_5_OPENJPEG_H

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

39 #else

40 # include <openjpeg.h>

41 #endif

43 #define JP2_SIG_TYPE 0x6A502020

44 #define JP2_SIG_VALUE 0x0D0A870A

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

47 // similar pix_fmts with higher bpp.

48 #define RGB_PIXEL_FORMATS AV_PIX_FMT_RGB24,AV_PIX_FMT_RGBA,AV_PIX_FMT_RGB48,AV_PIX_FMT_RGBA64

49 #define GRAY_PIXEL_FORMATS AV_PIX_FMT_GRAY8,AV_PIX_FMT_GRAY8A,AV_PIX_FMT_GRAY16

50 #define YUV_PIXEL_FORMATS AV_PIX_FMT_YUV410P,AV_PIX_FMT_YUV411P,AV_PIX_FMT_YUVA420P, \

51 AV_PIX_FMT_YUV420P,AV_PIX_FMT_YUV422P,AV_PIX_FMT_YUVA422P, \

52 AV_PIX_FMT_YUV440P,AV_PIX_FMT_YUV444P,AV_PIX_FMT_YUVA444P, \

53 AV_PIX_FMT_YUV420P9,AV_PIX_FMT_YUV422P9,AV_PIX_FMT_YUV444P9, \

54 AV_PIX_FMT_YUVA420P9,AV_PIX_FMT_YUVA422P9,AV_PIX_FMT_YUVA444P9, \

55 AV_PIX_FMT_YUV420P10,AV_PIX_FMT_YUV422P10,AV_PIX_FMT_YUV444P10, \

56 AV_PIX_FMT_YUVA420P10,AV_PIX_FMT_YUVA422P10,AV_PIX_FMT_YUVA444P10, \

57 AV_PIX_FMT_YUV420P12,AV_PIX_FMT_YUV422P12,AV_PIX_FMT_YUV444P12, \

58 AV_PIX_FMT_YUV420P14,AV_PIX_FMT_YUV422P14,AV_PIX_FMT_YUV444P14, \

59 AV_PIX_FMT_YUV420P16,AV_PIX_FMT_YUV422P16,AV_PIX_FMT_YUV444P16, \

60 AV_PIX_FMT_YUVA420P16,AV_PIX_FMT_YUVA422P16,AV_PIX_FMT_YUVA444P16

62 static const enum AVPixelFormat libopenjpeg_rgb_pix_fmts[] = {RGB_PIXEL_FORMATS};

63 static const enum AVPixelFormat libopenjpeg_gray_pix_fmts[] = {GRAY_PIXEL_FORMATS};

64 static const enum AVPixelFormat libopenjpeg_yuv_pix_fmts[] = {YUV_PIXEL_FORMATS};

65 static const enum AVPixelFormat libopenjpeg_all_pix_fmts[] = {RGB_PIXEL_FORMATS,GRAY_PIXEL_FORMATS,YUV_PIXEL_FORMATS};

67 typedef struct {

68 AVClass *class;

69 opj_dparameters_t dec_params;

70 AVFrame image;

71 int lowqual;

72 } LibOpenJPEGContext;

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

75 {

76 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);

77 int match = 1;

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

80 return 0;

81 }

83 switch (desc->nb_components) {

84 case 4: match = match && desc->comp[3].depth_minus1 + 1 >= image->comps[3].prec &&

85 1 == image->comps[3].dx &&

86 1 == image->comps[3].dy;

87 case 3: match = match && desc->comp[2].depth_minus1 + 1 >= image->comps[2].prec &&

88 1 << desc->log2_chroma_w == image->comps[2].dx &&

89 1 << desc->log2_chroma_h == image->comps[2].dy;

90 case 2: match = match && desc->comp[1].depth_minus1 + 1 >= image->comps[1].prec &&

91 1 << desc->log2_chroma_w == image->comps[1].dx &&

92 1 << desc->log2_chroma_h == image->comps[1].dy;

93 case 1: match = match && desc->comp[0].depth_minus1 + 1 >= image->comps[0].prec &&

94 1 == image->comps[0].dx &&

95 1 == image->comps[0].dy;

96 default:

97 break;

98 }

100 return match;

101 }

102

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

104 int index;

105 const enum AVPixelFormat *possible_fmts = NULL;

106 int possible_fmts_nb = 0;

107

108 switch (image->color_space) {

109 case CLRSPC_SRGB:

110 possible_fmts = libopenjpeg_rgb_pix_fmts;

111 possible_fmts_nb = FF_ARRAY_ELEMS(libopenjpeg_rgb_pix_fmts);

112 break;

113 case CLRSPC_GRAY:

114 possible_fmts = libopenjpeg_gray_pix_fmts;

115 possible_fmts_nb = FF_ARRAY_ELEMS(libopenjpeg_gray_pix_fmts);

116 break;

117 case CLRSPC_SYCC:

118 possible_fmts = libopenjpeg_yuv_pix_fmts;

119 possible_fmts_nb = FF_ARRAY_ELEMS(libopenjpeg_yuv_pix_fmts);

120 break;

121 default:

122 possible_fmts = libopenjpeg_all_pix_fmts;

123 possible_fmts_nb = FF_ARRAY_ELEMS(libopenjpeg_all_pix_fmts);

124 break;

125 }

126

127 for (index = 0; index < possible_fmts_nb; ++index) {

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

129 return possible_fmts[index];

130 }

131 }

132

133 return AV_PIX_FMT_NONE;

134 }

135

136 static inline int libopenjpeg_ispacked(enum AVPixelFormat pix_fmt)

137 {

138 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);

139 int i, component_plane;

140

141 if (pix_fmt == AV_PIX_FMT_GRAY16)

142 return 0;

143

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

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

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

147 return 0;

148 }

149 return 1;

150 }

151

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

153 uint8_t *img_ptr;

154 int index, x, y, c;

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

156 index = y*picture->width;

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

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

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

160 *img_ptr++ = image->comps[c].data[index];

161 }

162 }

163 }

164 }

165

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

167 uint16_t *img_ptr;

168 int index, x, y, c;

169 int adjust[4];

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

171 adjust[x] = FFMAX(FFMIN(16 - image->comps[x].prec, 8), 0);

172

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

174 index = y*picture->width;

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

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

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

178 *img_ptr++ = image->comps[c].data[index] << adjust[c];

179 }

180 }

181 }

182 }

183

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

185 int *comp_data;

186 uint8_t *img_ptr;

187 int index, x, y;

188

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

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

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

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

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

194 *img_ptr = (uint8_t) *comp_data;

195 img_ptr++;

196 comp_data++;

197 }

198 }

199 }

200 }

201

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

203 int *comp_data;

204 uint16_t *img_ptr;

205 int index, x, y;

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

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

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

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

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

211 *img_ptr = *comp_data;

212 img_ptr++;

213 comp_data++;

214 }

215 }

216 }

217 }

218

219 static av_cold int libopenjpeg_decode_init(AVCodecContext *avctx)

220 {

221 LibOpenJPEGContext *ctx = avctx->priv_data;

222

223 opj_set_default_decoder_parameters(&ctx->dec_params);

224 avcodec_get_frame_defaults(&ctx->image);

225 avctx->coded_frame = &ctx->image;

226 return 0;

227 }

228

229 static av_cold int libopenjpeg_decode_init_thread_copy(AVCodecContext *avctx)

230 {

231 LibOpenJPEGContext *ctx = avctx->priv_data;

232

233 avctx->coded_frame = &ctx->image;

234 return 0;

235 }

236

237 static int libopenjpeg_decode_frame(AVCodecContext *avctx,

238 void *data, int *got_frame,

239 AVPacket *avpkt)

240 {

241 uint8_t *buf = avpkt->data;

242 int buf_size = avpkt->size;

243 LibOpenJPEGContext *ctx = avctx->priv_data;

244 AVFrame *picture = &ctx->image, *output = data;

245 const AVPixFmtDescriptor *desc;

246 opj_dinfo_t *dec;

247 opj_cio_t *stream;

248 opj_image_t *image;

249 int width, height, ret = -1;

250 int pixel_size = 0;

251 int ispacked = 0;

252 int i;

253

254 *got_frame = 0;

255

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

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

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

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

260 dec = opj_create_decompress(CODEC_JP2);

261 } else {

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

263 * the starting byte of the codestream. */

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

265 buf += 8;

266 dec = opj_create_decompress(CODEC_J2K);

267 }

268

269 if (!dec) {

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

271 return -1;

272 }

273 opj_set_event_mgr((opj_common_ptr)dec, NULL, NULL);

274 ctx->dec_params.cp_limit_decoding = LIMIT_TO_MAIN_HEADER;

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

276 // Tie decoder with decoding parameters

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

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

279

280 if (!stream) {

281 av_log(avctx, AV_LOG_ERROR,

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

283 opj_destroy_decompress(dec);

284 return -1;

285 }

286

287 // Decode the header only.

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

289 opj_cio_close(stream);

290

291 if (!image) {

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

293 opj_destroy_decompress(dec);

294 return -1;

295 }

296

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

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

299

300 if (av_image_check_size(width, height, 0, avctx) < 0) {

301 av_log(avctx, AV_LOG_ERROR,

302 "%dx%d dimension invalid.\n", width, height);

303 goto done;

304 }

305

306 avcodec_set_dimensions(avctx, width, height);

307

308 if (avctx->pix_fmt != AV_PIX_FMT_NONE)

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

310 avctx->pix_fmt = AV_PIX_FMT_NONE;

311

312 if (avctx->pix_fmt == AV_PIX_FMT_NONE)

313 avctx->pix_fmt = libopenjpeg_guess_pix_fmt(image);

314

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

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

317 goto done;

318 }

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

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

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

322

323 if (picture->data[0])

324 ff_thread_release_buffer(avctx, picture);

325

326 if (ff_thread_get_buffer(avctx, picture) < 0) {

327 av_log(avctx, AV_LOG_ERROR, "ff_thread_get_buffer() failed\n");

328 goto done;

329 }

330

331 ctx->dec_params.cp_limit_decoding = NO_LIMITATION;

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

333 // Tie decoder with decoding parameters.

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

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

336 if (!stream) {

337 av_log(avctx, AV_LOG_ERROR,

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

339 goto done;

340 }

341

342 opj_image_destroy(image);

343 // Decode the codestream

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

345 opj_cio_close(stream);

346

347 if (!image) {

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

349 goto done;

350 }

351

352 desc = av_pix_fmt_desc_get(avctx->pix_fmt);

353 pixel_size = desc->comp[0].step_minus1 + 1;

354 ispacked = libopenjpeg_ispacked(avctx->pix_fmt);

355

356 switch (pixel_size) {

357 case 1:

358 if (ispacked) {

359 libopenjpeg_copy_to_packed8(picture, image);

360 } else {

361 libopenjpeg_copyto8(picture, image);

362 }

363 break;

364 case 2:

365 if (ispacked) {

366 libopenjpeg_copy_to_packed8(picture, image);

367 } else {

368 libopenjpeg_copyto16(picture, image);

369 }

370 break;

371 case 3:

372 case 4:

373 if (ispacked) {

374 libopenjpeg_copy_to_packed8(picture, image);

375 }

376 break;

377 case 6:

378 case 8:

379 if (ispacked) {

380 libopenjpeg_copy_to_packed16(picture, image);

381 }

382 break;

383 default:

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

385 goto done;

386 }

387

388 *output = ctx->image;

389 *got_frame = 1;

390 ret = buf_size;

391

392 done:

393 opj_image_destroy(image);

394 opj_destroy_decompress(dec);

395 return ret;

396 }

397

398 static av_cold int libopenjpeg_decode_close(AVCodecContext *avctx)

399 {

400 LibOpenJPEGContext *ctx = avctx->priv_data;

401

402 if (ctx->image.data[0])

403 ff_thread_release_buffer(avctx, &ctx->image);

404 return 0;

405 }

406

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

408 #define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM

409

410 static const AVOption options[] = {

411 { "lowqual", "Limit the number of layers used for decoding", OFFSET(lowqual), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, VD },

412 { NULL },

413 };

414

415 static const AVClass class = {

416 .class_name = "libopenjpeg",

417 .item_name = av_default_item_name,

418 .option = options,

419 .version = LIBAVUTIL_VERSION_INT,

420 };

421

422 AVCodec ff_libopenjpeg_decoder = {

423 .name = "libopenjpeg",

424 .type = AVMEDIA_TYPE_VIDEO,

425 .id = AV_CODEC_ID_JPEG2000,

426 .priv_data_size = sizeof(LibOpenJPEGContext),

427 .init = libopenjpeg_decode_init,

428 .close = libopenjpeg_decode_close,

429 .decode = libopenjpeg_decode_frame,

430 .capabilities = CODEC_CAP_DR1 | CODEC_CAP_FRAME_THREADS,

431 .max_lowres = 31,

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

433 .priv_class = &class,

434 .init_thread_copy = ONLY_IF_THREADS_ENABLED(libopenjpeg_decode_init_thread_copy),

435 };

Generated on Sat May 25 2013 03:58:36 for FFmpeg by doxygen 1.8.2