libavcodec/libopenjpegdec.c
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00001 /*
00002  * JPEG 2000 decoding support via OpenJPEG
00003  * Copyright (c) 2009 Jaikrishnan Menon <realityman@gmx.net>
00004  *
00005  * This file is part of FFmpeg.
00006  *
00007  * FFmpeg is free software; you can redistribute it and/or
00008  * modify it under the terms of the GNU Lesser General Public
00009  * License as published by the Free Software Foundation; either
00010  * version 2.1 of the License, or (at your option) any later version.
00011  *
00012  * FFmpeg is distributed in the hope that it will be useful,
00013  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00014  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00015  * Lesser General Public License for more details.
00016  *
00017  * You should have received a copy of the GNU Lesser General Public
00018  * License along with FFmpeg; if not, write to the Free Software
00019  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
00020  */
00021 
00027 #include "libavutil/imgutils.h"
00028 #include "libavutil/pixfmt.h"
00029 #include "avcodec.h"
00030 #include "libavutil/intreadwrite.h"
00031 #include "thread.h"
00032 #define  OPJ_STATIC
00033 #include <openjpeg.h>
00034 
00035 #define JP2_SIG_TYPE    0x6A502020
00036 #define JP2_SIG_VALUE   0x0D0A870A
00037 
00038 typedef struct {
00039     opj_dparameters_t dec_params;
00040     AVFrame image;
00041 } LibOpenJPEGContext;
00042 
00043 static enum PixelFormat check_image_attributes(AVCodecContext *avctx, opj_image_t *image)
00044 {
00045     opj_image_comp_t c0 = image->comps[0];
00046     opj_image_comp_t c1 = image->comps[1];
00047     opj_image_comp_t c2 = image->comps[2];
00048     int compRatio = 0;
00049     compRatio |= c0.dx << 15 | c0.dy << 12;
00050     compRatio |= c1.dx << 9  | c1.dy << 6;
00051     compRatio |= c2.dx << 3  | c2.dy;
00052 
00053     switch (compRatio) {
00054     case 0111111: goto libopenjpeg_yuv444_rgb;
00055     case 0111212: return PIX_FMT_YUV440P;
00056     case 0112121: goto libopenjpeg_yuv422;
00057     case 0112222: goto libopenjpeg_yuv420;
00058     default: goto libopenjpeg_rgb;
00059     }
00060 
00061 libopenjpeg_yuv420:
00062     switch (c0.prec) {
00063     case 8:  return PIX_FMT_YUV420P;
00064     case 9:  return PIX_FMT_YUV420P9;
00065     case 10: return PIX_FMT_YUV420P10;
00066     case 16: return PIX_FMT_YUV420P16;
00067     }
00068 
00069 libopenjpeg_yuv422:
00070     switch (c0.prec) {
00071     case 8:  return PIX_FMT_YUV422P;
00072     case 9:  return PIX_FMT_YUV422P9;
00073     case 10: return PIX_FMT_YUV422P10;
00074     case 16: return PIX_FMT_YUV422P16;
00075     }
00076 
00077 libopenjpeg_yuv444_rgb:
00078     switch (c0.prec) {
00079     case 8:  return PIX_FMT_RGB24;
00080     case 9:  return PIX_FMT_YUV444P9;
00081     case 10: return PIX_FMT_YUV444P10;
00082     case 16: return PIX_FMT_YUV444P16;
00083     }
00084 
00085 libopenjpeg_rgb:
00086     switch (c0.prec) {
00087     case 8: return PIX_FMT_RGB24;
00088     default: return PIX_FMT_RGB48;
00089     }
00090 
00091     return PIX_FMT_RGB24;
00092 }
00093 
00094 static int is_yuva420(opj_image_t *image)
00095 {
00096     return image->numcomps == 4 &&
00097            image->comps[0].dx == 1 && image->comps[0].dy == 1 &&
00098            image->comps[1].dx == 2 && image->comps[1].dy == 2 &&
00099            image->comps[2].dx == 2 && image->comps[2].dy == 2 &&
00100            image->comps[3].dx == 1 && image->comps[3].dy == 1;
00101 }
00102 
00103 static inline int libopenjpeg_ispacked(enum PixelFormat pix_fmt) {
00104     int i, component_plane;
00105     component_plane = av_pix_fmt_descriptors[pix_fmt].comp[0].plane;
00106     for(i = 1; i < av_pix_fmt_descriptors[pix_fmt].nb_components; i++) {
00107         if (component_plane != av_pix_fmt_descriptors[pix_fmt].comp[i].plane)
00108             return 0;
00109     }
00110     return 1;
00111 }
00112 
00113 static inline void libopenjpeg_copy_to_packed8(AVFrame *picture, opj_image_t *image) {
00114     uint8_t *img_ptr;
00115     int index, x, y, c;
00116     for(y = 0; y < picture->height; y++) {
00117         index = y*picture->width;
00118         img_ptr = picture->data[0] + y*picture->linesize[0];
00119         for(x = 0; x < picture->width; x++, index++) {
00120             for(c = 0; c < image->numcomps; c++) {
00121                 *img_ptr++ = image->comps[c].data[index];
00122             }
00123         }
00124     }
00125 }
00126 
00127 static inline void libopenjpeg_copy_to_packed16(AVFrame *picture, opj_image_t *image) {
00128     uint16_t *img_ptr;
00129     int index, x, y, c;
00130     int adjust[4];
00131     for (x = 0; x < image->numcomps; x++) {
00132         adjust[x] = FFMAX(FFMIN(16 - image->comps[x].prec, 8), 0);
00133     }
00134     for (y = 0; y < picture->height; y++) {
00135         index = y*picture->width;
00136         img_ptr = (uint16_t*) (picture->data[0] + y*picture->linesize[0]);
00137         for (x = 0; x < picture->width; x++, index++) {
00138             for (c = 0; c < image->numcomps; c++) {
00139                 *img_ptr++ = image->comps[c].data[index] << adjust[c];
00140             }
00141         }
00142     }
00143 }
00144 
00145 static inline void libopenjpeg_copyto8(AVFrame *picture, opj_image_t *image) {
00146     int *comp_data;
00147     uint8_t *img_ptr;
00148     int index, x, y;
00149 
00150     for(index = 0; index < image->numcomps; index++) {
00151         comp_data = image->comps[index].data;
00152         for(y = 0; y < image->comps[index].h; y++) {
00153             img_ptr = picture->data[index] + y * picture->linesize[index];
00154             for(x = 0; x < image->comps[index].w; x++) {
00155                 *img_ptr = (uint8_t) *comp_data;
00156                 img_ptr++;
00157                 comp_data++;
00158             }
00159         }
00160     }
00161 }
00162 
00163 static inline void libopenjpeg_copyto16(AVFrame *picture, opj_image_t *image) {
00164     int *comp_data;
00165     uint16_t *img_ptr;
00166     int index, x, y;
00167     for(index = 0; index < image->numcomps; index++) {
00168         comp_data = image->comps[index].data;
00169         for(y = 0; y < image->comps[index].h; y++) {
00170             img_ptr = (uint16_t*) (picture->data[index] + y * picture->linesize[index]);
00171             for(x = 0; x < image->comps[index].w; x++) {
00172                 *img_ptr = *comp_data;
00173                 img_ptr++;
00174                 comp_data++;
00175             }
00176         }
00177     }
00178 }
00179 
00180 static av_cold int libopenjpeg_decode_init(AVCodecContext *avctx)
00181 {
00182     LibOpenJPEGContext *ctx = avctx->priv_data;
00183 
00184     opj_set_default_decoder_parameters(&ctx->dec_params);
00185     avcodec_get_frame_defaults(&ctx->image);
00186     avctx->coded_frame = &ctx->image;
00187     return 0;
00188 }
00189 
00190 static av_cold int libopenjpeg_decode_init_thread_copy(AVCodecContext *avctx)
00191 {
00192     LibOpenJPEGContext *ctx = avctx->priv_data;
00193 
00194     avctx->coded_frame = &ctx->image;
00195     return 0;
00196 }
00197 
00198 static int libopenjpeg_decode_frame(AVCodecContext *avctx,
00199                                     void *data, int *data_size,
00200                                     AVPacket *avpkt)
00201 {
00202     uint8_t *buf = avpkt->data;
00203     int buf_size = avpkt->size;
00204     LibOpenJPEGContext *ctx = avctx->priv_data;
00205     AVFrame *picture = &ctx->image, *output = data;
00206     opj_dinfo_t *dec;
00207     opj_cio_t *stream;
00208     opj_image_t *image;
00209     int width, height, ret = -1;
00210     int pixel_size = 0;
00211     int ispacked = 0;
00212 
00213     *data_size = 0;
00214 
00215     // Check if input is a raw jpeg2k codestream or in jp2 wrapping
00216     if((AV_RB32(buf) == 12) &&
00217        (AV_RB32(buf + 4) == JP2_SIG_TYPE) &&
00218        (AV_RB32(buf + 8) == JP2_SIG_VALUE)) {
00219         dec = opj_create_decompress(CODEC_JP2);
00220     } else {
00221         // If the AVPacket contains a jp2c box, then skip to
00222         // the starting byte of the codestream.
00223         if (AV_RB32(buf + 4) == AV_RB32("jp2c"))
00224             buf += 8;
00225         dec = opj_create_decompress(CODEC_J2K);
00226     }
00227 
00228     if(!dec) {
00229         av_log(avctx, AV_LOG_ERROR, "Error initializing decoder.\n");
00230         return -1;
00231     }
00232     opj_set_event_mgr((opj_common_ptr)dec, NULL, NULL);
00233 
00234     ctx->dec_params.cp_limit_decoding = LIMIT_TO_MAIN_HEADER;
00235     // Tie decoder with decoding parameters
00236     opj_setup_decoder(dec, &ctx->dec_params);
00237     stream = opj_cio_open((opj_common_ptr)dec, buf, buf_size);
00238     if(!stream) {
00239         av_log(avctx, AV_LOG_ERROR, "Codestream could not be opened for reading.\n");
00240         opj_destroy_decompress(dec);
00241         return -1;
00242     }
00243 
00244     // Decode the header only
00245     image = opj_decode_with_info(dec, stream, NULL);
00246     opj_cio_close(stream);
00247     if(!image) {
00248         av_log(avctx, AV_LOG_ERROR, "Error decoding codestream.\n");
00249         opj_destroy_decompress(dec);
00250         return -1;
00251     }
00252     width  = image->x1 - image->x0;
00253     height = image->y1 - image->y0;
00254     if(av_image_check_size(width, height, 0, avctx) < 0) {
00255         av_log(avctx, AV_LOG_ERROR, "%dx%d dimension invalid.\n", width, height);
00256         goto done;
00257     }
00258     avcodec_set_dimensions(avctx, width, height);
00259 
00260     switch (image->numcomps) {
00261     case 1:  avctx->pix_fmt = PIX_FMT_GRAY8;
00262              break;
00263     case 3:  avctx->pix_fmt = check_image_attributes(avctx, image);
00264              break;
00265     case 4:  avctx->pix_fmt = is_yuva420(image) ? PIX_FMT_YUVA420P : PIX_FMT_RGBA;
00266              break;
00267     default: av_log(avctx, AV_LOG_ERROR, "%d components unsupported.\n", image->numcomps);
00268              goto done;
00269     }
00270 
00271     if(picture->data[0])
00272         ff_thread_release_buffer(avctx, picture);
00273 
00274     if(ff_thread_get_buffer(avctx, picture) < 0){
00275         av_log(avctx, AV_LOG_ERROR, "ff_thread_get_buffer() failed\n");
00276         return -1;
00277     }
00278 
00279     ctx->dec_params.cp_limit_decoding = NO_LIMITATION;
00280     ctx->dec_params.cp_reduce = avctx->lowres;
00281     // Tie decoder with decoding parameters
00282     opj_setup_decoder(dec, &ctx->dec_params);
00283     stream = opj_cio_open((opj_common_ptr)dec, buf, buf_size);
00284     if(!stream) {
00285         av_log(avctx, AV_LOG_ERROR, "Codestream could not be opened for reading.\n");
00286         opj_destroy_decompress(dec);
00287         return -1;
00288     }
00289 
00290     // Decode the codestream
00291     image = opj_decode_with_info(dec, stream, NULL);
00292     opj_cio_close(stream);
00293 
00294     pixel_size = av_pix_fmt_descriptors[avctx->pix_fmt].comp[0].step_minus1 + 1;
00295     ispacked = libopenjpeg_ispacked(avctx->pix_fmt);
00296 
00297     switch (pixel_size) {
00298     case 1:
00299         if (ispacked) {
00300             libopenjpeg_copy_to_packed8(picture, image);
00301         } else {
00302             libopenjpeg_copyto8(picture, image);
00303         }
00304         break;
00305     case 2:
00306         libopenjpeg_copyto16(picture, image);
00307         break;
00308     case 3:
00309     case 4:
00310         if (ispacked) {
00311             libopenjpeg_copy_to_packed8(picture, image);
00312         }
00313         break;
00314     case 6:
00315         if (ispacked) {
00316             libopenjpeg_copy_to_packed16(picture, image);
00317         }
00318         break;
00319     default:
00320         av_log(avctx, AV_LOG_ERROR, "unsupported pixel size %d\n", pixel_size);
00321         goto done;
00322     }
00323 
00324     *output    = ctx->image;
00325     *data_size = sizeof(AVPicture);
00326     ret = buf_size;
00327 
00328 done:
00329     opj_image_destroy(image);
00330     opj_destroy_decompress(dec);
00331     return ret;
00332 }
00333 
00334 static av_cold int libopenjpeg_decode_close(AVCodecContext *avctx)
00335 {
00336     LibOpenJPEGContext *ctx = avctx->priv_data;
00337 
00338     if(ctx->image.data[0])
00339         ff_thread_release_buffer(avctx, &ctx->image);
00340     return 0 ;
00341 }
00342 
00343 
00344 AVCodec ff_libopenjpeg_decoder = {
00345     .name           = "libopenjpeg",
00346     .type           = AVMEDIA_TYPE_VIDEO,
00347     .id             = CODEC_ID_JPEG2000,
00348     .priv_data_size = sizeof(LibOpenJPEGContext),
00349     .init           = libopenjpeg_decode_init,
00350     .close          = libopenjpeg_decode_close,
00351     .decode         = libopenjpeg_decode_frame,
00352     .capabilities   = CODEC_CAP_DR1 | CODEC_CAP_FRAME_THREADS,
00353     .max_lowres     = 5,
00354     .long_name      = NULL_IF_CONFIG_SMALL("OpenJPEG based JPEG 2000 decoder"),
00355     .init_thread_copy = ONLY_IF_THREADS_ENABLED(libopenjpeg_decode_init_thread_copy)
00356 };