| /* |
| * JPEG 2000 decoding support via OpenJPEG |
| * Copyright (c) 2009 Jaikrishnan Menon <realityman@gmx.net> |
| * |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * FFmpeg is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with FFmpeg; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| /** |
| * @file |
| * JPEG 2000 decoder using libopenjpeg |
| */ |
| |
| #include "libavutil/imgutils.h" |
| #include "libavutil/pixfmt.h" |
| #include "avcodec.h" |
| #include "libavutil/intreadwrite.h" |
| #include "thread.h" |
| #define OPJ_STATIC |
| #include <openjpeg.h> |
| |
| #define JP2_SIG_TYPE 0x6A502020 |
| #define JP2_SIG_VALUE 0x0D0A870A |
| |
| typedef struct { |
| opj_dparameters_t dec_params; |
| AVFrame image; |
| } LibOpenJPEGContext; |
| |
| static enum PixelFormat check_image_attributes(AVCodecContext *avctx, opj_image_t *image) |
| { |
| opj_image_comp_t c0 = image->comps[0]; |
| opj_image_comp_t c1 = image->comps[1]; |
| opj_image_comp_t c2 = image->comps[2]; |
| int compRatio = 0; |
| compRatio |= c0.dx << 15 | c0.dy << 12; |
| compRatio |= c1.dx << 9 | c1.dy << 6; |
| compRatio |= c2.dx << 3 | c2.dy; |
| |
| switch (compRatio) { |
| case 0111111: goto libopenjpeg_yuv444_rgb; |
| case 0111212: return PIX_FMT_YUV440P; |
| case 0112121: goto libopenjpeg_yuv422; |
| case 0112222: goto libopenjpeg_yuv420; |
| default: goto libopenjpeg_rgb; |
| } |
| |
| libopenjpeg_yuv420: |
| switch (c0.prec) { |
| case 8: return PIX_FMT_YUV420P; |
| case 9: return PIX_FMT_YUV420P9; |
| case 10: return PIX_FMT_YUV420P10; |
| case 16: return PIX_FMT_YUV420P16; |
| } |
| |
| libopenjpeg_yuv422: |
| switch (c0.prec) { |
| case 8: return PIX_FMT_YUV422P; |
| case 9: return PIX_FMT_YUV422P9; |
| case 10: return PIX_FMT_YUV422P10; |
| case 16: return PIX_FMT_YUV422P16; |
| } |
| |
| libopenjpeg_yuv444_rgb: |
| switch (c0.prec) { |
| case 8: return PIX_FMT_RGB24; |
| case 9: return PIX_FMT_YUV444P9; |
| case 10: return PIX_FMT_YUV444P10; |
| case 16: return PIX_FMT_YUV444P16; |
| } |
| |
| libopenjpeg_rgb: |
| switch (c0.prec) { |
| case 8: return PIX_FMT_RGB24; |
| default: return PIX_FMT_RGB48; |
| } |
| |
| return PIX_FMT_RGB24; |
| } |
| |
| static int is_yuva420(opj_image_t *image) |
| { |
| return image->numcomps == 4 && |
| image->comps[0].dx == 1 && image->comps[0].dy == 1 && |
| image->comps[1].dx == 2 && image->comps[1].dy == 2 && |
| image->comps[2].dx == 2 && image->comps[2].dy == 2 && |
| image->comps[3].dx == 1 && image->comps[3].dy == 1; |
| } |
| |
| static inline int libopenjpeg_ispacked(enum PixelFormat pix_fmt) { |
| int i, component_plane; |
| component_plane = av_pix_fmt_descriptors[pix_fmt].comp[0].plane; |
| for(i = 1; i < av_pix_fmt_descriptors[pix_fmt].nb_components; i++) { |
| if (component_plane != av_pix_fmt_descriptors[pix_fmt].comp[i].plane) |
| return 0; |
| } |
| return 1; |
| } |
| |
| static inline void libopenjpeg_copy_to_packed8(AVFrame *picture, opj_image_t *image) { |
| uint8_t *img_ptr; |
| int index, x, y, c; |
| for(y = 0; y < picture->height; y++) { |
| index = y*picture->width; |
| img_ptr = picture->data[0] + y*picture->linesize[0]; |
| for(x = 0; x < picture->width; x++, index++) { |
| for(c = 0; c < image->numcomps; c++) { |
| *img_ptr++ = image->comps[c].data[index]; |
| } |
| } |
| } |
| } |
| |
| static inline void libopenjpeg_copy_to_packed16(AVFrame *picture, opj_image_t *image) { |
| uint16_t *img_ptr; |
| int index, x, y, c; |
| int adjust[4]; |
| for (x = 0; x < image->numcomps; x++) { |
| adjust[x] = FFMAX(FFMIN(16 - image->comps[x].prec, 8), 0); |
| } |
| for (y = 0; y < picture->height; y++) { |
| index = y*picture->width; |
| img_ptr = (uint16_t*) (picture->data[0] + y*picture->linesize[0]); |
| for (x = 0; x < picture->width; x++, index++) { |
| for (c = 0; c < image->numcomps; c++) { |
| *img_ptr++ = image->comps[c].data[index] << adjust[c]; |
| } |
| } |
| } |
| } |
| |
| static inline void libopenjpeg_copyto8(AVFrame *picture, opj_image_t *image) { |
| int *comp_data; |
| uint8_t *img_ptr; |
| int index, x, y; |
| |
| for(index = 0; index < image->numcomps; index++) { |
| comp_data = image->comps[index].data; |
| for(y = 0; y < image->comps[index].h; y++) { |
| img_ptr = picture->data[index] + y * picture->linesize[index]; |
| for(x = 0; x < image->comps[index].w; x++) { |
| *img_ptr = (uint8_t) *comp_data; |
| img_ptr++; |
| comp_data++; |
| } |
| } |
| } |
| } |
| |
| static inline void libopenjpeg_copyto16(AVFrame *picture, opj_image_t *image) { |
| int *comp_data; |
| uint16_t *img_ptr; |
| int index, x, y; |
| for(index = 0; index < image->numcomps; index++) { |
| comp_data = image->comps[index].data; |
| for(y = 0; y < image->comps[index].h; y++) { |
| img_ptr = (uint16_t*) (picture->data[index] + y * picture->linesize[index]); |
| for(x = 0; x < image->comps[index].w; x++) { |
| *img_ptr = *comp_data; |
| img_ptr++; |
| comp_data++; |
| } |
| } |
| } |
| } |
| |
| static av_cold int libopenjpeg_decode_init(AVCodecContext *avctx) |
| { |
| LibOpenJPEGContext *ctx = avctx->priv_data; |
| |
| opj_set_default_decoder_parameters(&ctx->dec_params); |
| avcodec_get_frame_defaults(&ctx->image); |
| avctx->coded_frame = &ctx->image; |
| return 0; |
| } |
| |
| static av_cold int libopenjpeg_decode_init_thread_copy(AVCodecContext *avctx) |
| { |
| LibOpenJPEGContext *ctx = avctx->priv_data; |
| |
| avctx->coded_frame = &ctx->image; |
| return 0; |
| } |
| |
| static int libopenjpeg_decode_frame(AVCodecContext *avctx, |
| void *data, int *data_size, |
| AVPacket *avpkt) |
| { |
| uint8_t *buf = avpkt->data; |
| int buf_size = avpkt->size; |
| LibOpenJPEGContext *ctx = avctx->priv_data; |
| AVFrame *picture = &ctx->image, *output = data; |
| opj_dinfo_t *dec; |
| opj_cio_t *stream; |
| opj_image_t *image; |
| int width, height, ret = -1; |
| int pixel_size = 0; |
| int ispacked = 0; |
| |
| *data_size = 0; |
| |
| // Check if input is a raw jpeg2k codestream or in jp2 wrapping |
| if((AV_RB32(buf) == 12) && |
| (AV_RB32(buf + 4) == JP2_SIG_TYPE) && |
| (AV_RB32(buf + 8) == JP2_SIG_VALUE)) { |
| dec = opj_create_decompress(CODEC_JP2); |
| } else { |
| // If the AVPacket contains a jp2c box, then skip to |
| // the starting byte of the codestream. |
| if (AV_RB32(buf + 4) == AV_RB32("jp2c")) |
| buf += 8; |
| dec = opj_create_decompress(CODEC_J2K); |
| } |
| |
| if(!dec) { |
| av_log(avctx, AV_LOG_ERROR, "Error initializing decoder.\n"); |
| return -1; |
| } |
| opj_set_event_mgr((opj_common_ptr)dec, NULL, NULL); |
| |
| ctx->dec_params.cp_limit_decoding = LIMIT_TO_MAIN_HEADER; |
| // Tie decoder with decoding parameters |
| opj_setup_decoder(dec, &ctx->dec_params); |
| stream = opj_cio_open((opj_common_ptr)dec, buf, buf_size); |
| if(!stream) { |
| av_log(avctx, AV_LOG_ERROR, "Codestream could not be opened for reading.\n"); |
| opj_destroy_decompress(dec); |
| return -1; |
| } |
| |
| // Decode the header only |
| image = opj_decode_with_info(dec, stream, NULL); |
| opj_cio_close(stream); |
| if(!image) { |
| av_log(avctx, AV_LOG_ERROR, "Error decoding codestream.\n"); |
| opj_destroy_decompress(dec); |
| return -1; |
| } |
| width = image->x1 - image->x0; |
| height = image->y1 - image->y0; |
| if(av_image_check_size(width, height, 0, avctx) < 0) { |
| av_log(avctx, AV_LOG_ERROR, "%dx%d dimension invalid.\n", width, height); |
| goto done; |
| } |
| avcodec_set_dimensions(avctx, width, height); |
| |
| switch (image->numcomps) { |
| case 1: avctx->pix_fmt = PIX_FMT_GRAY8; |
| break; |
| case 3: avctx->pix_fmt = check_image_attributes(avctx, image); |
| break; |
| case 4: avctx->pix_fmt = is_yuva420(image) ? PIX_FMT_YUVA420P : PIX_FMT_RGBA; |
| break; |
| default: av_log(avctx, AV_LOG_ERROR, "%d components unsupported.\n", image->numcomps); |
| goto done; |
| } |
| |
| if(picture->data[0]) |
| ff_thread_release_buffer(avctx, picture); |
| |
| if(ff_thread_get_buffer(avctx, picture) < 0){ |
| av_log(avctx, AV_LOG_ERROR, "ff_thread_get_buffer() failed\n"); |
| return -1; |
| } |
| |
| ctx->dec_params.cp_limit_decoding = NO_LIMITATION; |
| ctx->dec_params.cp_reduce = avctx->lowres; |
| // Tie decoder with decoding parameters |
| opj_setup_decoder(dec, &ctx->dec_params); |
| stream = opj_cio_open((opj_common_ptr)dec, buf, buf_size); |
| if(!stream) { |
| av_log(avctx, AV_LOG_ERROR, "Codestream could not be opened for reading.\n"); |
| opj_destroy_decompress(dec); |
| return -1; |
| } |
| |
| // Decode the codestream |
| image = opj_decode_with_info(dec, stream, NULL); |
| opj_cio_close(stream); |
| |
| pixel_size = av_pix_fmt_descriptors[avctx->pix_fmt].comp[0].step_minus1 + 1; |
| ispacked = libopenjpeg_ispacked(avctx->pix_fmt); |
| |
| switch (pixel_size) { |
| case 1: |
| if (ispacked) { |
| libopenjpeg_copy_to_packed8(picture, image); |
| } else { |
| libopenjpeg_copyto8(picture, image); |
| } |
| break; |
| case 2: |
| libopenjpeg_copyto16(picture, image); |
| break; |
| case 3: |
| case 4: |
| if (ispacked) { |
| libopenjpeg_copy_to_packed8(picture, image); |
| } |
| break; |
| case 6: |
| if (ispacked) { |
| libopenjpeg_copy_to_packed16(picture, image); |
| } |
| break; |
| default: |
| av_log(avctx, AV_LOG_ERROR, "unsupported pixel size %d\n", pixel_size); |
| goto done; |
| } |
| |
| *output = ctx->image; |
| *data_size = sizeof(AVPicture); |
| ret = buf_size; |
| |
| done: |
| opj_image_destroy(image); |
| opj_destroy_decompress(dec); |
| return ret; |
| } |
| |
| static av_cold int libopenjpeg_decode_close(AVCodecContext *avctx) |
| { |
| LibOpenJPEGContext *ctx = avctx->priv_data; |
| |
| if(ctx->image.data[0]) |
| ff_thread_release_buffer(avctx, &ctx->image); |
| return 0 ; |
| } |
| |
| |
| AVCodec ff_libopenjpeg_decoder = { |
| .name = "libopenjpeg", |
| .type = AVMEDIA_TYPE_VIDEO, |
| .id = CODEC_ID_JPEG2000, |
| .priv_data_size = sizeof(LibOpenJPEGContext), |
| .init = libopenjpeg_decode_init, |
| .close = libopenjpeg_decode_close, |
| .decode = libopenjpeg_decode_frame, |
| .capabilities = CODEC_CAP_DR1 | CODEC_CAP_FRAME_THREADS, |
| .max_lowres = 5, |
| .long_name = NULL_IF_CONFIG_SMALL("OpenJPEG based JPEG 2000 decoder"), |
| .init_thread_copy = ONLY_IF_THREADS_ENABLED(libopenjpeg_decode_init_thread_copy) |
| }; |
