2 * JPEG 2000 decoding support via OpenJPEG
3 * Copyright (c) 2009 Jaikrishnan Menon <realityman@gmx.net>
5 * This file is part of FFmpeg.
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.
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.
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
24 * JPEG 2000 decoder using libopenjpeg
27 #include "libavutil/imgutils.h"
28 #include "libavutil/pixfmt.h"
30 #include "libavutil/intreadwrite.h"
35 #define JP2_SIG_TYPE 0x6A502020
36 #define JP2_SIG_VALUE 0x0D0A870A
39 opj_dparameters_t dec_params;
43 static enum PixelFormat check_image_attributes(AVCodecContext *avctx, opj_image_t *image)
45 opj_image_comp_t c0 = image->comps[0];
46 opj_image_comp_t c1 = image->comps[1];
47 opj_image_comp_t c2 = image->comps[2];
49 compRatio |= c0.dx << 15 | c0.dy << 12;
50 compRatio |= c1.dx << 9 | c1.dy << 6;
51 compRatio |= c2.dx << 3 | c2.dy;
54 case 0111111: goto libopenjpeg_yuv444_rgb;
55 case 0111212: return PIX_FMT_YUV440P;
56 case 0112121: goto libopenjpeg_yuv422;
57 case 0112222: goto libopenjpeg_yuv420;
58 default: goto libopenjpeg_rgb;
63 case 8: return PIX_FMT_YUV420P;
64 case 9: return PIX_FMT_YUV420P9;
65 case 10: return PIX_FMT_YUV420P10;
66 case 16: return PIX_FMT_YUV420P16;
71 case 8: return PIX_FMT_YUV422P;
72 case 9: return PIX_FMT_YUV422P9;
73 case 10: return PIX_FMT_YUV422P10;
74 case 16: return PIX_FMT_YUV422P16;
77 libopenjpeg_yuv444_rgb:
79 case 8: return PIX_FMT_RGB24;
80 case 9: return PIX_FMT_YUV444P9;
81 case 10: return PIX_FMT_YUV444P10;
82 case 16: return PIX_FMT_YUV444P16;
87 case 8: return PIX_FMT_RGB24;
88 default: return PIX_FMT_RGB48;
94 static int is_yuva420(opj_image_t *image)
96 return image->numcomps == 4 &&
97 image->comps[0].dx == 1 && image->comps[0].dy == 1 &&
98 image->comps[1].dx == 2 && image->comps[1].dy == 2 &&
99 image->comps[2].dx == 2 && image->comps[2].dy == 2 &&
100 image->comps[3].dx == 1 && image->comps[3].dy == 1;
103 static inline int libopenjpeg_ispacked(enum PixelFormat pix_fmt) {
104 int i, component_plane;
105 component_plane = av_pix_fmt_descriptors[pix_fmt].comp[0].plane;
106 for(i = 1; i < av_pix_fmt_descriptors[pix_fmt].nb_components; i++) {
107 if (component_plane != av_pix_fmt_descriptors[pix_fmt].comp[i].plane)
113 static inline void libopenjpeg_copy_to_packed8(AVFrame *picture, opj_image_t *image) {
116 for(y = 0; y < picture->height; y++) {
117 index = y*picture->width;
118 img_ptr = picture->data[0] + y*picture->linesize[0];
119 for(x = 0; x < picture->width; x++, index++) {
120 for(c = 0; c < image->numcomps; c++) {
121 *img_ptr++ = image->comps[c].data[index];
127 static inline void libopenjpeg_copy_to_packed16(AVFrame *picture, opj_image_t *image) {
131 for (x = 0; x < image->numcomps; x++) {
132 adjust[x] = FFMAX(FFMIN(16 - image->comps[x].prec, 8), 0);
134 for (y = 0; y < picture->height; y++) {
135 index = y*picture->width;
136 img_ptr = (uint16_t*) (picture->data[0] + y*picture->linesize[0]);
137 for (x = 0; x < picture->width; x++, index++) {
138 for (c = 0; c < image->numcomps; c++) {
139 *img_ptr++ = image->comps[c].data[index] << adjust[c];
145 static inline void libopenjpeg_copyto8(AVFrame *picture, opj_image_t *image) {
150 for(index = 0; index < image->numcomps; index++) {
151 comp_data = image->comps[index].data;
152 for(y = 0; y < image->comps[index].h; y++) {
153 img_ptr = picture->data[index] + y * picture->linesize[index];
154 for(x = 0; x < image->comps[index].w; x++) {
155 *img_ptr = (uint8_t) *comp_data;
163 static inline void libopenjpeg_copyto16(AVFrame *picture, opj_image_t *image) {
167 for(index = 0; index < image->numcomps; index++) {
168 comp_data = image->comps[index].data;
169 for(y = 0; y < image->comps[index].h; y++) {
170 img_ptr = (uint16_t*) (picture->data[index] + y * picture->linesize[index]);
171 for(x = 0; x < image->comps[index].w; x++) {
172 *img_ptr = *comp_data;
180 static av_cold int libopenjpeg_decode_init(AVCodecContext *avctx)
182 LibOpenJPEGContext *ctx = avctx->priv_data;
184 opj_set_default_decoder_parameters(&ctx->dec_params);
185 avcodec_get_frame_defaults(&ctx->image);
186 avctx->coded_frame = &ctx->image;
190 static av_cold int libopenjpeg_decode_init_thread_copy(AVCodecContext *avctx)
192 LibOpenJPEGContext *ctx = avctx->priv_data;
194 avctx->coded_frame = &ctx->image;
198 static int libopenjpeg_decode_frame(AVCodecContext *avctx,
199 void *data, int *data_size,
202 uint8_t *buf = avpkt->data;
203 int buf_size = avpkt->size;
204 LibOpenJPEGContext *ctx = avctx->priv_data;
205 AVFrame *picture = &ctx->image, *output = data;
209 int width, height, ret = -1;
215 // Check if input is a raw jpeg2k codestream or in jp2 wrapping
216 if((AV_RB32(buf) == 12) &&
217 (AV_RB32(buf + 4) == JP2_SIG_TYPE) &&
218 (AV_RB32(buf + 8) == JP2_SIG_VALUE)) {
219 dec = opj_create_decompress(CODEC_JP2);
221 // If the AVPacket contains a jp2c box, then skip to
222 // the starting byte of the codestream.
223 if (AV_RB32(buf + 4) == AV_RB32("jp2c"))
225 dec = opj_create_decompress(CODEC_J2K);
229 av_log(avctx, AV_LOG_ERROR, "Error initializing decoder.\n");
232 opj_set_event_mgr((opj_common_ptr)dec, NULL, NULL);
234 ctx->dec_params.cp_limit_decoding = LIMIT_TO_MAIN_HEADER;
235 // Tie decoder with decoding parameters
236 opj_setup_decoder(dec, &ctx->dec_params);
237 stream = opj_cio_open((opj_common_ptr)dec, buf, buf_size);
239 av_log(avctx, AV_LOG_ERROR, "Codestream could not be opened for reading.\n");
240 opj_destroy_decompress(dec);
244 // Decode the header only
245 image = opj_decode_with_info(dec, stream, NULL);
246 opj_cio_close(stream);
248 av_log(avctx, AV_LOG_ERROR, "Error decoding codestream.\n");
249 opj_destroy_decompress(dec);
252 width = image->x1 - image->x0;
253 height = image->y1 - image->y0;
254 if(av_image_check_size(width, height, 0, avctx) < 0) {
255 av_log(avctx, AV_LOG_ERROR, "%dx%d dimension invalid.\n", width, height);
258 avcodec_set_dimensions(avctx, width, height);
260 switch (image->numcomps) {
261 case 1: avctx->pix_fmt = PIX_FMT_GRAY8;
263 case 3: avctx->pix_fmt = check_image_attributes(avctx, image);
265 case 4: avctx->pix_fmt = is_yuva420(image) ? PIX_FMT_YUVA420P : PIX_FMT_RGBA;
267 default: av_log(avctx, AV_LOG_ERROR, "%d components unsupported.\n", image->numcomps);
272 ff_thread_release_buffer(avctx, picture);
274 if(ff_thread_get_buffer(avctx, picture) < 0){
275 av_log(avctx, AV_LOG_ERROR, "ff_thread_get_buffer() failed\n");
279 ctx->dec_params.cp_limit_decoding = NO_LIMITATION;
280 ctx->dec_params.cp_reduce = avctx->lowres;
281 // Tie decoder with decoding parameters
282 opj_setup_decoder(dec, &ctx->dec_params);
283 stream = opj_cio_open((opj_common_ptr)dec, buf, buf_size);
285 av_log(avctx, AV_LOG_ERROR, "Codestream could not be opened for reading.\n");
286 opj_destroy_decompress(dec);
290 // Decode the codestream
291 image = opj_decode_with_info(dec, stream, NULL);
292 opj_cio_close(stream);
294 pixel_size = av_pix_fmt_descriptors[avctx->pix_fmt].comp[0].step_minus1 + 1;
295 ispacked = libopenjpeg_ispacked(avctx->pix_fmt);
297 switch (pixel_size) {
300 libopenjpeg_copy_to_packed8(picture, image);
302 libopenjpeg_copyto8(picture, image);
306 libopenjpeg_copyto16(picture, image);
311 libopenjpeg_copy_to_packed8(picture, image);
316 libopenjpeg_copy_to_packed16(picture, image);
320 av_log(avctx, AV_LOG_ERROR, "unsupported pixel size %d\n", pixel_size);
324 *output = ctx->image;
325 *data_size = sizeof(AVPicture);
329 opj_image_destroy(image);
330 opj_destroy_decompress(dec);
334 static av_cold int libopenjpeg_decode_close(AVCodecContext *avctx)
336 LibOpenJPEGContext *ctx = avctx->priv_data;
338 if(ctx->image.data[0])
339 ff_thread_release_buffer(avctx, &ctx->image);
344 AVCodec ff_libopenjpeg_decoder = {
345 .name = "libopenjpeg",
346 .type = AVMEDIA_TYPE_VIDEO,
347 .id = CODEC_ID_JPEG2000,
348 .priv_data_size = sizeof(LibOpenJPEGContext),
349 .init = libopenjpeg_decode_init,
350 .close = libopenjpeg_decode_close,
351 .decode = libopenjpeg_decode_frame,
352 .capabilities = CODEC_CAP_DR1 | CODEC_CAP_FRAME_THREADS,
354 .long_name = NULL_IF_CONFIG_SMALL("OpenJPEG based JPEG 2000 decoder"),
355 .init_thread_copy = ONLY_IF_THREADS_ENABLED(libopenjpeg_decode_init_thread_copy)