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