diff options
Diffstat (limited to 'libavcodec/libopenjpeg.c')
-rw-r--r-- | libavcodec/libopenjpeg.c | 225 |
1 files changed, 0 insertions, 225 deletions
diff --git a/libavcodec/libopenjpeg.c b/libavcodec/libopenjpeg.c deleted file mode 100644 index 1facd21..0000000 --- a/libavcodec/libopenjpeg.c +++ /dev/null @@ -1,225 +0,0 @@ -/* - * JPEG 2000 decoding support via OpenJPEG - * Copyright (c) 2009 Jaikrishnan Menon <realityman@gmx.net> - * - * This file is part of Libav. - * - * Libav 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. - * - * Libav 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 Libav; 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 "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 int check_image_attributes(opj_image_t *image) -{ - return image->comps[0].dx == image->comps[1].dx && - image->comps[1].dx == image->comps[2].dx && - image->comps[0].dy == image->comps[1].dy && - image->comps[1].dy == image->comps[2].dy && - image->comps[0].prec == image->comps[1].prec && - image->comps[1].prec == image->comps[2].prec; -} - -static av_cold int libopenjpeg_decode_init(AVCodecContext *avctx) -{ - LibOpenJPEGContext *ctx = avctx->priv_data; - - opj_set_default_decoder_parameters(&ctx->dec_params); - 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, has_alpha = 0, ret = -1; - int x, y, index; - uint8_t *img_ptr; - int adjust[4]; - - *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: if(check_image_attributes(image)) { - avctx->pix_fmt = PIX_FMT_RGB24; - } else { - avctx->pix_fmt = PIX_FMT_GRAY8; - av_log(avctx, AV_LOG_ERROR, "Only first component will be used.\n"); - } - break; - case 4: has_alpha = 1; - avctx->pix_fmt = 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; - } - - ff_thread_finish_setup(avctx); - - 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); - - for(x = 0; x < image->numcomps; x++) { - adjust[x] = FFMAX(image->comps[x].prec - 8, 0); - } - - for(y = 0; y < avctx->height; y++) { - index = y*avctx->width; - img_ptr = picture->data[0] + y*picture->linesize[0]; - for(x = 0; x < avctx->width; x++, index++) { - *img_ptr++ = image->comps[0].data[index] >> adjust[0]; - if(image->numcomps > 2 && check_image_attributes(image)) { - *img_ptr++ = image->comps[1].data[index] >> adjust[1]; - *img_ptr++ = image->comps[2].data[index] >> adjust[2]; - if(has_alpha) - *img_ptr++ = image->comps[3].data[index] >> adjust[3]; - } - } - } - - *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) -}; |