forked from KolibriOS/kolibrios
1729 lines
64 KiB
C
1729 lines
64 KiB
C
/*
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* JPEG 2000 image decoder
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* Copyright (c) 2007 Kamil Nowosad
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* Copyright (c) 2013 Nicolas Bertrand <nicoinattendu@gmail.com>
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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 image decoder
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*/
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#include "libavutil/avassert.h"
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#include "libavutil/common.h"
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#include "libavutil/opt.h"
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#include "libavutil/pixdesc.h"
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#include "avcodec.h"
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#include "bytestream.h"
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#include "internal.h"
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#include "thread.h"
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#include "jpeg2000.h"
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#define JP2_SIG_TYPE 0x6A502020
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#define JP2_SIG_VALUE 0x0D0A870A
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#define JP2_CODESTREAM 0x6A703263
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#define JP2_HEADER 0x6A703268
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#define HAD_COC 0x01
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#define HAD_QCC 0x02
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typedef struct Jpeg2000TilePart {
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uint8_t tile_index; // Tile index who refers the tile-part
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const uint8_t *tp_end;
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GetByteContext tpg; // bit stream in tile-part
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} Jpeg2000TilePart;
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/* RMK: For JPEG2000 DCINEMA 3 tile-parts in a tile
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* one per component, so tile_part elements have a size of 3 */
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typedef struct Jpeg2000Tile {
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Jpeg2000Component *comp;
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uint8_t properties[4];
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Jpeg2000CodingStyle codsty[4];
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Jpeg2000QuantStyle qntsty[4];
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Jpeg2000TilePart tile_part[4];
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uint16_t tp_idx; // Tile-part index
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} Jpeg2000Tile;
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typedef struct Jpeg2000DecoderContext {
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AVClass *class;
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AVCodecContext *avctx;
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GetByteContext g;
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int width, height;
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int image_offset_x, image_offset_y;
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int tile_offset_x, tile_offset_y;
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uint8_t cbps[4]; // bits per sample in particular components
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uint8_t sgnd[4]; // if a component is signed
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uint8_t properties[4];
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int cdx[4], cdy[4];
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int precision;
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int ncomponents;
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int colour_space;
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uint32_t palette[256];
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int8_t pal8;
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int cdef[4];
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int tile_width, tile_height;
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unsigned numXtiles, numYtiles;
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int maxtilelen;
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Jpeg2000CodingStyle codsty[4];
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Jpeg2000QuantStyle qntsty[4];
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int bit_index;
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int curtileno;
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Jpeg2000Tile *tile;
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/*options parameters*/
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int reduction_factor;
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} Jpeg2000DecoderContext;
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/* get_bits functions for JPEG2000 packet bitstream
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* It is a get_bit function with a bit-stuffing routine. If the value of the
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* byte is 0xFF, the next byte includes an extra zero bit stuffed into the MSB.
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* cf. ISO-15444-1:2002 / B.10.1 Bit-stuffing routine */
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static int get_bits(Jpeg2000DecoderContext *s, int n)
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{
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int res = 0;
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while (--n >= 0) {
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res <<= 1;
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if (s->bit_index == 0) {
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s->bit_index = 7 + (bytestream2_get_byte(&s->g) != 0xFFu);
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}
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s->bit_index--;
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res |= (bytestream2_peek_byte(&s->g) >> s->bit_index) & 1;
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}
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return res;
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}
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static void jpeg2000_flush(Jpeg2000DecoderContext *s)
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{
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if (bytestream2_get_byte(&s->g) == 0xff)
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bytestream2_skip(&s->g, 1);
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s->bit_index = 8;
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}
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/* decode the value stored in node */
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static int tag_tree_decode(Jpeg2000DecoderContext *s, Jpeg2000TgtNode *node,
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int threshold)
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{
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Jpeg2000TgtNode *stack[30];
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int sp = -1, curval = 0;
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if (!node)
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return AVERROR_INVALIDDATA;
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while (node && !node->vis) {
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stack[++sp] = node;
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node = node->parent;
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}
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if (node)
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curval = node->val;
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else
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curval = stack[sp]->val;
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while (curval < threshold && sp >= 0) {
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if (curval < stack[sp]->val)
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curval = stack[sp]->val;
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while (curval < threshold) {
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int ret;
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if ((ret = get_bits(s, 1)) > 0) {
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stack[sp]->vis++;
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break;
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} else if (!ret)
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curval++;
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else
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return ret;
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}
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stack[sp]->val = curval;
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sp--;
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}
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return curval;
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}
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static int pix_fmt_match(enum AVPixelFormat pix_fmt, int components,
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int bpc, uint32_t log2_chroma_wh, int pal8)
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{
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int match = 1;
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const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
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if (desc->nb_components != components) {
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return 0;
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}
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switch (components) {
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case 4:
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match = match && desc->comp[3].depth_minus1 + 1 >= bpc &&
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(log2_chroma_wh >> 14 & 3) == 0 &&
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(log2_chroma_wh >> 12 & 3) == 0;
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case 3:
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match = match && desc->comp[2].depth_minus1 + 1 >= bpc &&
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(log2_chroma_wh >> 10 & 3) == desc->log2_chroma_w &&
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(log2_chroma_wh >> 8 & 3) == desc->log2_chroma_h;
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case 2:
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match = match && desc->comp[1].depth_minus1 + 1 >= bpc &&
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(log2_chroma_wh >> 6 & 3) == desc->log2_chroma_w &&
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(log2_chroma_wh >> 4 & 3) == desc->log2_chroma_h;
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case 1:
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match = match && desc->comp[0].depth_minus1 + 1 >= bpc &&
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(log2_chroma_wh >> 2 & 3) == 0 &&
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(log2_chroma_wh & 3) == 0 &&
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(desc->flags & AV_PIX_FMT_FLAG_PAL) == pal8 * AV_PIX_FMT_FLAG_PAL;
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}
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return match;
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}
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// pix_fmts with lower bpp have to be listed before
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// similar pix_fmts with higher bpp.
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#define RGB_PIXEL_FORMATS AV_PIX_FMT_PAL8,AV_PIX_FMT_RGB24,AV_PIX_FMT_RGBA,AV_PIX_FMT_RGB48,AV_PIX_FMT_RGBA64
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#define GRAY_PIXEL_FORMATS AV_PIX_FMT_GRAY8,AV_PIX_FMT_GRAY8A,AV_PIX_FMT_GRAY16
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#define YUV_PIXEL_FORMATS AV_PIX_FMT_YUV410P,AV_PIX_FMT_YUV411P,AV_PIX_FMT_YUVA420P, \
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AV_PIX_FMT_YUV420P,AV_PIX_FMT_YUV422P,AV_PIX_FMT_YUVA422P, \
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AV_PIX_FMT_YUV440P,AV_PIX_FMT_YUV444P,AV_PIX_FMT_YUVA444P, \
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AV_PIX_FMT_YUV420P9,AV_PIX_FMT_YUV422P9,AV_PIX_FMT_YUV444P9, \
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AV_PIX_FMT_YUVA420P9,AV_PIX_FMT_YUVA422P9,AV_PIX_FMT_YUVA444P9, \
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AV_PIX_FMT_YUV420P10,AV_PIX_FMT_YUV422P10,AV_PIX_FMT_YUV444P10, \
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AV_PIX_FMT_YUVA420P10,AV_PIX_FMT_YUVA422P10,AV_PIX_FMT_YUVA444P10, \
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AV_PIX_FMT_YUV420P12,AV_PIX_FMT_YUV422P12,AV_PIX_FMT_YUV444P12, \
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AV_PIX_FMT_YUV420P14,AV_PIX_FMT_YUV422P14,AV_PIX_FMT_YUV444P14, \
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AV_PIX_FMT_YUV420P16,AV_PIX_FMT_YUV422P16,AV_PIX_FMT_YUV444P16, \
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AV_PIX_FMT_YUVA420P16,AV_PIX_FMT_YUVA422P16,AV_PIX_FMT_YUVA444P16
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#define XYZ_PIXEL_FORMATS AV_PIX_FMT_XYZ12
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static const enum AVPixelFormat rgb_pix_fmts[] = {RGB_PIXEL_FORMATS};
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static const enum AVPixelFormat gray_pix_fmts[] = {GRAY_PIXEL_FORMATS};
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static const enum AVPixelFormat yuv_pix_fmts[] = {YUV_PIXEL_FORMATS};
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static const enum AVPixelFormat xyz_pix_fmts[] = {XYZ_PIXEL_FORMATS};
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static const enum AVPixelFormat all_pix_fmts[] = {RGB_PIXEL_FORMATS,
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GRAY_PIXEL_FORMATS,
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YUV_PIXEL_FORMATS,
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XYZ_PIXEL_FORMATS};
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/* marker segments */
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/* get sizes and offsets of image, tiles; number of components */
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static int get_siz(Jpeg2000DecoderContext *s)
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{
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int i;
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int ncomponents;
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uint32_t log2_chroma_wh = 0;
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const enum AVPixelFormat *possible_fmts = NULL;
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int possible_fmts_nb = 0;
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if (bytestream2_get_bytes_left(&s->g) < 36)
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return AVERROR_INVALIDDATA;
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s->avctx->profile = bytestream2_get_be16u(&s->g); // Rsiz
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s->width = bytestream2_get_be32u(&s->g); // Width
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s->height = bytestream2_get_be32u(&s->g); // Height
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s->image_offset_x = bytestream2_get_be32u(&s->g); // X0Siz
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s->image_offset_y = bytestream2_get_be32u(&s->g); // Y0Siz
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s->tile_width = bytestream2_get_be32u(&s->g); // XTSiz
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s->tile_height = bytestream2_get_be32u(&s->g); // YTSiz
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s->tile_offset_x = bytestream2_get_be32u(&s->g); // XT0Siz
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s->tile_offset_y = bytestream2_get_be32u(&s->g); // YT0Siz
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ncomponents = bytestream2_get_be16u(&s->g); // CSiz
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if (s->image_offset_x || s->image_offset_y) {
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avpriv_request_sample(s->avctx, "Support for image offsets");
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return AVERROR_PATCHWELCOME;
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}
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if (ncomponents <= 0) {
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av_log(s->avctx, AV_LOG_ERROR, "Invalid number of components: %d\n",
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s->ncomponents);
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return AVERROR_INVALIDDATA;
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}
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if (ncomponents > 4) {
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avpriv_request_sample(s->avctx, "Support for %d components",
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s->ncomponents);
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return AVERROR_PATCHWELCOME;
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}
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s->ncomponents = ncomponents;
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if (s->tile_width <= 0 || s->tile_height <= 0) {
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av_log(s->avctx, AV_LOG_ERROR, "Invalid tile dimension %dx%d.\n",
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s->tile_width, s->tile_height);
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return AVERROR_INVALIDDATA;
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}
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if (bytestream2_get_bytes_left(&s->g) < 3 * s->ncomponents)
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return AVERROR_INVALIDDATA;
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for (i = 0; i < s->ncomponents; i++) { // Ssiz_i XRsiz_i, YRsiz_i
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uint8_t x = bytestream2_get_byteu(&s->g);
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s->cbps[i] = (x & 0x7f) + 1;
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s->precision = FFMAX(s->cbps[i], s->precision);
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s->sgnd[i] = !!(x & 0x80);
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s->cdx[i] = bytestream2_get_byteu(&s->g);
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s->cdy[i] = bytestream2_get_byteu(&s->g);
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if ( !s->cdx[i] || s->cdx[i] == 3 || s->cdx[i] > 4
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|| !s->cdy[i] || s->cdy[i] == 3 || s->cdy[i] > 4) {
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av_log(s->avctx, AV_LOG_ERROR, "Invalid sample separation %d/%d\n", s->cdx[i], s->cdy[i]);
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return AVERROR_INVALIDDATA;
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}
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log2_chroma_wh |= s->cdy[i] >> 1 << i * 4 | s->cdx[i] >> 1 << i * 4 + 2;
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}
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s->numXtiles = ff_jpeg2000_ceildiv(s->width - s->tile_offset_x, s->tile_width);
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s->numYtiles = ff_jpeg2000_ceildiv(s->height - s->tile_offset_y, s->tile_height);
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if (s->numXtiles * (uint64_t)s->numYtiles > INT_MAX/sizeof(*s->tile)) {
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s->numXtiles = s->numYtiles = 0;
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return AVERROR(EINVAL);
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}
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s->tile = av_mallocz_array(s->numXtiles * s->numYtiles, sizeof(*s->tile));
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if (!s->tile) {
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s->numXtiles = s->numYtiles = 0;
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return AVERROR(ENOMEM);
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}
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for (i = 0; i < s->numXtiles * s->numYtiles; i++) {
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Jpeg2000Tile *tile = s->tile + i;
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tile->comp = av_mallocz(s->ncomponents * sizeof(*tile->comp));
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if (!tile->comp)
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return AVERROR(ENOMEM);
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}
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/* compute image size with reduction factor */
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s->avctx->width = ff_jpeg2000_ceildivpow2(s->width - s->image_offset_x,
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s->reduction_factor);
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s->avctx->height = ff_jpeg2000_ceildivpow2(s->height - s->image_offset_y,
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s->reduction_factor);
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if (s->avctx->profile == FF_PROFILE_JPEG2000_DCINEMA_2K ||
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s->avctx->profile == FF_PROFILE_JPEG2000_DCINEMA_4K) {
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possible_fmts = xyz_pix_fmts;
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possible_fmts_nb = FF_ARRAY_ELEMS(xyz_pix_fmts);
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} else {
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switch (s->colour_space) {
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case 16:
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possible_fmts = rgb_pix_fmts;
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possible_fmts_nb = FF_ARRAY_ELEMS(rgb_pix_fmts);
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break;
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case 17:
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possible_fmts = gray_pix_fmts;
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possible_fmts_nb = FF_ARRAY_ELEMS(gray_pix_fmts);
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break;
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case 18:
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possible_fmts = yuv_pix_fmts;
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possible_fmts_nb = FF_ARRAY_ELEMS(yuv_pix_fmts);
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break;
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default:
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possible_fmts = all_pix_fmts;
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possible_fmts_nb = FF_ARRAY_ELEMS(all_pix_fmts);
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break;
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}
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}
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for (i = 0; i < possible_fmts_nb; ++i) {
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if (pix_fmt_match(possible_fmts[i], ncomponents, s->precision, log2_chroma_wh, s->pal8)) {
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s->avctx->pix_fmt = possible_fmts[i];
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break;
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}
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}
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if (s->avctx->pix_fmt == AV_PIX_FMT_NONE) {
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av_log(s->avctx, AV_LOG_ERROR,
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"Unknown pix_fmt, profile: %d, colour_space: %d, "
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"components: %d, precision: %d, "
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"cdx[1]: %d, cdy[1]: %d, cdx[2]: %d, cdy[2]: %d\n",
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s->avctx->profile, s->colour_space, ncomponents, s->precision,
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ncomponents > 2 ? s->cdx[1] : 0,
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ncomponents > 2 ? s->cdy[1] : 0,
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ncomponents > 2 ? s->cdx[2] : 0,
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ncomponents > 2 ? s->cdy[2] : 0);
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}
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s->avctx->bits_per_raw_sample = s->precision;
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return 0;
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}
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/* get common part for COD and COC segments */
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static int get_cox(Jpeg2000DecoderContext *s, Jpeg2000CodingStyle *c)
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{
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uint8_t byte;
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if (bytestream2_get_bytes_left(&s->g) < 5)
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return AVERROR_INVALIDDATA;
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/* nreslevels = number of resolution levels
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= number of decomposition level +1 */
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c->nreslevels = bytestream2_get_byteu(&s->g) + 1;
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if (c->nreslevels >= JPEG2000_MAX_RESLEVELS) {
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av_log(s->avctx, AV_LOG_ERROR, "nreslevels %d is invalid\n", c->nreslevels);
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return AVERROR_INVALIDDATA;
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}
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if (c->nreslevels <= s->reduction_factor) {
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/* we are forced to update reduction_factor as its requested value is
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not compatible with this bitstream, and as we might have used it
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already in setup earlier we have to fail this frame until
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reinitialization is implemented */
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av_log(s->avctx, AV_LOG_ERROR, "reduction_factor too large for this bitstream, max is %d\n", c->nreslevels - 1);
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s->reduction_factor = c->nreslevels - 1;
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return AVERROR(EINVAL);
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}
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/* compute number of resolution levels to decode */
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c->nreslevels2decode = c->nreslevels - s->reduction_factor;
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c->log2_cblk_width = (bytestream2_get_byteu(&s->g) & 15) + 2; // cblk width
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c->log2_cblk_height = (bytestream2_get_byteu(&s->g) & 15) + 2; // cblk height
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if (c->log2_cblk_width > 10 || c->log2_cblk_height > 10 ||
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c->log2_cblk_width + c->log2_cblk_height > 12) {
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av_log(s->avctx, AV_LOG_ERROR, "cblk size invalid\n");
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return AVERROR_INVALIDDATA;
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}
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if (c->log2_cblk_width > 6 || c->log2_cblk_height > 6) {
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avpriv_request_sample(s->avctx, "cblk size > 64");
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return AVERROR_PATCHWELCOME;
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}
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c->cblk_style = bytestream2_get_byteu(&s->g);
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if (c->cblk_style != 0) { // cblk style
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av_log(s->avctx, AV_LOG_WARNING, "extra cblk styles %X\n", c->cblk_style);
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}
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c->transform = bytestream2_get_byteu(&s->g); // DWT transformation type
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/* set integer 9/7 DWT in case of BITEXACT flag */
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if ((s->avctx->flags & CODEC_FLAG_BITEXACT) && (c->transform == FF_DWT97))
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c->transform = FF_DWT97_INT;
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if (c->csty & JPEG2000_CSTY_PREC) {
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int i;
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for (i = 0; i < c->nreslevels; i++) {
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byte = bytestream2_get_byte(&s->g);
|
|
c->log2_prec_widths[i] = byte & 0x0F; // precinct PPx
|
|
c->log2_prec_heights[i] = (byte >> 4) & 0x0F; // precinct PPy
|
|
}
|
|
} else {
|
|
memset(c->log2_prec_widths , 15, sizeof(c->log2_prec_widths ));
|
|
memset(c->log2_prec_heights, 15, sizeof(c->log2_prec_heights));
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/* get coding parameters for a particular tile or whole image*/
|
|
static int get_cod(Jpeg2000DecoderContext *s, Jpeg2000CodingStyle *c,
|
|
uint8_t *properties)
|
|
{
|
|
Jpeg2000CodingStyle tmp;
|
|
int compno, ret;
|
|
|
|
if (bytestream2_get_bytes_left(&s->g) < 5)
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
tmp.csty = bytestream2_get_byteu(&s->g);
|
|
|
|
// get progression order
|
|
tmp.prog_order = bytestream2_get_byteu(&s->g);
|
|
|
|
tmp.nlayers = bytestream2_get_be16u(&s->g);
|
|
tmp.mct = bytestream2_get_byteu(&s->g); // multiple component transformation
|
|
|
|
if (tmp.mct && s->ncomponents < 3) {
|
|
av_log(s->avctx, AV_LOG_ERROR,
|
|
"MCT %d with too few components (%d)\n",
|
|
tmp.mct, s->ncomponents);
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
if ((ret = get_cox(s, &tmp)) < 0)
|
|
return ret;
|
|
|
|
for (compno = 0; compno < s->ncomponents; compno++)
|
|
if (!(properties[compno] & HAD_COC))
|
|
memcpy(c + compno, &tmp, sizeof(tmp));
|
|
return 0;
|
|
}
|
|
|
|
/* Get coding parameters for a component in the whole image or a
|
|
* particular tile. */
|
|
static int get_coc(Jpeg2000DecoderContext *s, Jpeg2000CodingStyle *c,
|
|
uint8_t *properties)
|
|
{
|
|
int compno, ret;
|
|
|
|
if (bytestream2_get_bytes_left(&s->g) < 2)
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
compno = bytestream2_get_byteu(&s->g);
|
|
|
|
if (compno >= s->ncomponents) {
|
|
av_log(s->avctx, AV_LOG_ERROR,
|
|
"Invalid compno %d. There are %d components in the image.\n",
|
|
compno, s->ncomponents);
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
c += compno;
|
|
c->csty = bytestream2_get_byteu(&s->g);
|
|
|
|
if ((ret = get_cox(s, c)) < 0)
|
|
return ret;
|
|
|
|
properties[compno] |= HAD_COC;
|
|
return 0;
|
|
}
|
|
|
|
/* Get common part for QCD and QCC segments. */
|
|
static int get_qcx(Jpeg2000DecoderContext *s, int n, Jpeg2000QuantStyle *q)
|
|
{
|
|
int i, x;
|
|
|
|
if (bytestream2_get_bytes_left(&s->g) < 1)
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
x = bytestream2_get_byteu(&s->g); // Sqcd
|
|
|
|
q->nguardbits = x >> 5;
|
|
q->quantsty = x & 0x1f;
|
|
|
|
if (q->quantsty == JPEG2000_QSTY_NONE) {
|
|
n -= 3;
|
|
if (bytestream2_get_bytes_left(&s->g) < n ||
|
|
n > JPEG2000_MAX_DECLEVELS*3)
|
|
return AVERROR_INVALIDDATA;
|
|
for (i = 0; i < n; i++)
|
|
q->expn[i] = bytestream2_get_byteu(&s->g) >> 3;
|
|
} else if (q->quantsty == JPEG2000_QSTY_SI) {
|
|
if (bytestream2_get_bytes_left(&s->g) < 2)
|
|
return AVERROR_INVALIDDATA;
|
|
x = bytestream2_get_be16u(&s->g);
|
|
q->expn[0] = x >> 11;
|
|
q->mant[0] = x & 0x7ff;
|
|
for (i = 1; i < JPEG2000_MAX_DECLEVELS * 3; i++) {
|
|
int curexpn = FFMAX(0, q->expn[0] - (i - 1) / 3);
|
|
q->expn[i] = curexpn;
|
|
q->mant[i] = q->mant[0];
|
|
}
|
|
} else {
|
|
n = (n - 3) >> 1;
|
|
if (bytestream2_get_bytes_left(&s->g) < 2 * n ||
|
|
n > JPEG2000_MAX_DECLEVELS*3)
|
|
return AVERROR_INVALIDDATA;
|
|
for (i = 0; i < n; i++) {
|
|
x = bytestream2_get_be16u(&s->g);
|
|
q->expn[i] = x >> 11;
|
|
q->mant[i] = x & 0x7ff;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/* Get quantization parameters for a particular tile or a whole image. */
|
|
static int get_qcd(Jpeg2000DecoderContext *s, int n, Jpeg2000QuantStyle *q,
|
|
uint8_t *properties)
|
|
{
|
|
Jpeg2000QuantStyle tmp;
|
|
int compno, ret;
|
|
|
|
if ((ret = get_qcx(s, n, &tmp)) < 0)
|
|
return ret;
|
|
for (compno = 0; compno < s->ncomponents; compno++)
|
|
if (!(properties[compno] & HAD_QCC))
|
|
memcpy(q + compno, &tmp, sizeof(tmp));
|
|
return 0;
|
|
}
|
|
|
|
/* Get quantization parameters for a component in the whole image
|
|
* on in a particular tile. */
|
|
static int get_qcc(Jpeg2000DecoderContext *s, int n, Jpeg2000QuantStyle *q,
|
|
uint8_t *properties)
|
|
{
|
|
int compno;
|
|
|
|
if (bytestream2_get_bytes_left(&s->g) < 1)
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
compno = bytestream2_get_byteu(&s->g);
|
|
|
|
if (compno >= s->ncomponents) {
|
|
av_log(s->avctx, AV_LOG_ERROR,
|
|
"Invalid compno %d. There are %d components in the image.\n",
|
|
compno, s->ncomponents);
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
properties[compno] |= HAD_QCC;
|
|
return get_qcx(s, n - 1, q + compno);
|
|
}
|
|
|
|
/* Get start of tile segment. */
|
|
static int get_sot(Jpeg2000DecoderContext *s, int n)
|
|
{
|
|
Jpeg2000TilePart *tp;
|
|
uint16_t Isot;
|
|
uint32_t Psot;
|
|
uint8_t TPsot;
|
|
|
|
if (bytestream2_get_bytes_left(&s->g) < 8)
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
s->curtileno = 0;
|
|
Isot = bytestream2_get_be16u(&s->g); // Isot
|
|
if (Isot >= s->numXtiles * s->numYtiles)
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
s->curtileno = Isot;
|
|
Psot = bytestream2_get_be32u(&s->g); // Psot
|
|
TPsot = bytestream2_get_byteu(&s->g); // TPsot
|
|
|
|
/* Read TNSot but not used */
|
|
bytestream2_get_byteu(&s->g); // TNsot
|
|
|
|
if (Psot > bytestream2_get_bytes_left(&s->g) + n + 2) {
|
|
av_log(s->avctx, AV_LOG_ERROR, "Psot %d too big\n", Psot);
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
if (TPsot >= FF_ARRAY_ELEMS(s->tile[Isot].tile_part)) {
|
|
avpriv_request_sample(s->avctx, "Support for %d components", TPsot);
|
|
return AVERROR_PATCHWELCOME;
|
|
}
|
|
|
|
s->tile[Isot].tp_idx = TPsot;
|
|
tp = s->tile[Isot].tile_part + TPsot;
|
|
tp->tile_index = Isot;
|
|
tp->tp_end = s->g.buffer + Psot - n - 2;
|
|
|
|
if (!TPsot) {
|
|
Jpeg2000Tile *tile = s->tile + s->curtileno;
|
|
|
|
/* copy defaults */
|
|
memcpy(tile->codsty, s->codsty, s->ncomponents * sizeof(Jpeg2000CodingStyle));
|
|
memcpy(tile->qntsty, s->qntsty, s->ncomponents * sizeof(Jpeg2000QuantStyle));
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Tile-part lengths: see ISO 15444-1:2002, section A.7.1
|
|
* Used to know the number of tile parts and lengths.
|
|
* There may be multiple TLMs in the header.
|
|
* TODO: The function is not used for tile-parts management, nor anywhere else.
|
|
* It can be useful to allocate memory for tile parts, before managing the SOT
|
|
* markers. Parsing the TLM header is needed to increment the input header
|
|
* buffer.
|
|
* This marker is mandatory for DCI. */
|
|
static uint8_t get_tlm(Jpeg2000DecoderContext *s, int n)
|
|
{
|
|
uint8_t Stlm, ST, SP, tile_tlm, i;
|
|
bytestream2_get_byte(&s->g); /* Ztlm: skipped */
|
|
Stlm = bytestream2_get_byte(&s->g);
|
|
|
|
// too complex ? ST = ((Stlm >> 4) & 0x01) + ((Stlm >> 4) & 0x02);
|
|
ST = (Stlm >> 4) & 0x03;
|
|
// TODO: Manage case of ST = 0b11 --> raise error
|
|
SP = (Stlm >> 6) & 0x01;
|
|
tile_tlm = (n - 4) / ((SP + 1) * 2 + ST);
|
|
for (i = 0; i < tile_tlm; i++) {
|
|
switch (ST) {
|
|
case 0:
|
|
break;
|
|
case 1:
|
|
bytestream2_get_byte(&s->g);
|
|
break;
|
|
case 2:
|
|
bytestream2_get_be16(&s->g);
|
|
break;
|
|
case 3:
|
|
bytestream2_get_be32(&s->g);
|
|
break;
|
|
}
|
|
if (SP == 0) {
|
|
bytestream2_get_be16(&s->g);
|
|
} else {
|
|
bytestream2_get_be32(&s->g);
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int init_tile(Jpeg2000DecoderContext *s, int tileno)
|
|
{
|
|
int compno;
|
|
int tilex = tileno % s->numXtiles;
|
|
int tiley = tileno / s->numXtiles;
|
|
Jpeg2000Tile *tile = s->tile + tileno;
|
|
|
|
if (!tile->comp)
|
|
return AVERROR(ENOMEM);
|
|
|
|
for (compno = 0; compno < s->ncomponents; compno++) {
|
|
Jpeg2000Component *comp = tile->comp + compno;
|
|
Jpeg2000CodingStyle *codsty = tile->codsty + compno;
|
|
Jpeg2000QuantStyle *qntsty = tile->qntsty + compno;
|
|
int ret; // global bandno
|
|
|
|
comp->coord_o[0][0] = FFMAX(tilex * s->tile_width + s->tile_offset_x, s->image_offset_x);
|
|
comp->coord_o[0][1] = FFMIN((tilex + 1) * s->tile_width + s->tile_offset_x, s->width);
|
|
comp->coord_o[1][0] = FFMAX(tiley * s->tile_height + s->tile_offset_y, s->image_offset_y);
|
|
comp->coord_o[1][1] = FFMIN((tiley + 1) * s->tile_height + s->tile_offset_y, s->height);
|
|
|
|
comp->coord[0][0] = ff_jpeg2000_ceildivpow2(comp->coord_o[0][0], s->reduction_factor);
|
|
comp->coord[0][1] = ff_jpeg2000_ceildivpow2(comp->coord_o[0][1], s->reduction_factor);
|
|
comp->coord[1][0] = ff_jpeg2000_ceildivpow2(comp->coord_o[1][0], s->reduction_factor);
|
|
comp->coord[1][1] = ff_jpeg2000_ceildivpow2(comp->coord_o[1][1], s->reduction_factor);
|
|
|
|
if (ret = ff_jpeg2000_init_component(comp, codsty, qntsty,
|
|
s->cbps[compno], s->cdx[compno],
|
|
s->cdy[compno], s->avctx))
|
|
return ret;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/* Read the number of coding passes. */
|
|
static int getnpasses(Jpeg2000DecoderContext *s)
|
|
{
|
|
int num;
|
|
if (!get_bits(s, 1))
|
|
return 1;
|
|
if (!get_bits(s, 1))
|
|
return 2;
|
|
if ((num = get_bits(s, 2)) != 3)
|
|
return num < 0 ? num : 3 + num;
|
|
if ((num = get_bits(s, 5)) != 31)
|
|
return num < 0 ? num : 6 + num;
|
|
num = get_bits(s, 7);
|
|
return num < 0 ? num : 37 + num;
|
|
}
|
|
|
|
static int getlblockinc(Jpeg2000DecoderContext *s)
|
|
{
|
|
int res = 0, ret;
|
|
while (ret = get_bits(s, 1)) {
|
|
if (ret < 0)
|
|
return ret;
|
|
res++;
|
|
}
|
|
return res;
|
|
}
|
|
|
|
static int jpeg2000_decode_packet(Jpeg2000DecoderContext *s,
|
|
Jpeg2000CodingStyle *codsty,
|
|
Jpeg2000ResLevel *rlevel, int precno,
|
|
int layno, uint8_t *expn, int numgbits)
|
|
{
|
|
int bandno, cblkno, ret, nb_code_blocks;
|
|
|
|
if (!(ret = get_bits(s, 1))) {
|
|
jpeg2000_flush(s);
|
|
return 0;
|
|
} else if (ret < 0)
|
|
return ret;
|
|
|
|
for (bandno = 0; bandno < rlevel->nbands; bandno++) {
|
|
Jpeg2000Band *band = rlevel->band + bandno;
|
|
Jpeg2000Prec *prec = band->prec + precno;
|
|
|
|
if (band->coord[0][0] == band->coord[0][1] ||
|
|
band->coord[1][0] == band->coord[1][1])
|
|
continue;
|
|
nb_code_blocks = prec->nb_codeblocks_height *
|
|
prec->nb_codeblocks_width;
|
|
for (cblkno = 0; cblkno < nb_code_blocks; cblkno++) {
|
|
Jpeg2000Cblk *cblk = prec->cblk + cblkno;
|
|
int incl, newpasses, llen;
|
|
|
|
if (cblk->npasses)
|
|
incl = get_bits(s, 1);
|
|
else
|
|
incl = tag_tree_decode(s, prec->cblkincl + cblkno, layno + 1) == layno;
|
|
if (!incl)
|
|
continue;
|
|
else if (incl < 0)
|
|
return incl;
|
|
|
|
if (!cblk->npasses) {
|
|
int v = expn[bandno] + numgbits - 1 -
|
|
tag_tree_decode(s, prec->zerobits + cblkno, 100);
|
|
if (v < 0) {
|
|
av_log(s->avctx, AV_LOG_ERROR,
|
|
"nonzerobits %d invalid\n", v);
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
cblk->nonzerobits = v;
|
|
}
|
|
if ((newpasses = getnpasses(s)) < 0)
|
|
return newpasses;
|
|
if ((llen = getlblockinc(s)) < 0)
|
|
return llen;
|
|
cblk->lblock += llen;
|
|
if ((ret = get_bits(s, av_log2(newpasses) + cblk->lblock)) < 0)
|
|
return ret;
|
|
if (ret > sizeof(cblk->data)) {
|
|
avpriv_request_sample(s->avctx,
|
|
"Block with lengthinc greater than %zu",
|
|
sizeof(cblk->data));
|
|
return AVERROR_PATCHWELCOME;
|
|
}
|
|
cblk->lengthinc = ret;
|
|
cblk->npasses += newpasses;
|
|
}
|
|
}
|
|
jpeg2000_flush(s);
|
|
|
|
if (codsty->csty & JPEG2000_CSTY_EPH) {
|
|
if (bytestream2_peek_be16(&s->g) == JPEG2000_EPH)
|
|
bytestream2_skip(&s->g, 2);
|
|
else
|
|
av_log(s->avctx, AV_LOG_ERROR, "EPH marker not found.\n");
|
|
}
|
|
|
|
for (bandno = 0; bandno < rlevel->nbands; bandno++) {
|
|
Jpeg2000Band *band = rlevel->band + bandno;
|
|
Jpeg2000Prec *prec = band->prec + precno;
|
|
|
|
nb_code_blocks = prec->nb_codeblocks_height * prec->nb_codeblocks_width;
|
|
for (cblkno = 0; cblkno < nb_code_blocks; cblkno++) {
|
|
Jpeg2000Cblk *cblk = prec->cblk + cblkno;
|
|
if ( bytestream2_get_bytes_left(&s->g) < cblk->lengthinc
|
|
|| sizeof(cblk->data) < cblk->length + cblk->lengthinc + 2
|
|
) {
|
|
av_log(s->avctx, AV_LOG_ERROR,
|
|
"Block length %d or lengthinc %d is too large\n",
|
|
cblk->length, cblk->lengthinc);
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
bytestream2_get_bufferu(&s->g, cblk->data + cblk->length, cblk->lengthinc);
|
|
cblk->length += cblk->lengthinc;
|
|
cblk->lengthinc = 0;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int jpeg2000_decode_packets(Jpeg2000DecoderContext *s, Jpeg2000Tile *tile)
|
|
{
|
|
int ret = 0;
|
|
int layno, reslevelno, compno, precno, ok_reslevel;
|
|
int x, y;
|
|
|
|
s->bit_index = 8;
|
|
switch (tile->codsty[0].prog_order) {
|
|
case JPEG2000_PGOD_RLCP:
|
|
avpriv_request_sample(s->avctx, "Progression order RLCP");
|
|
|
|
case JPEG2000_PGOD_LRCP:
|
|
for (layno = 0; layno < tile->codsty[0].nlayers; layno++) {
|
|
ok_reslevel = 1;
|
|
for (reslevelno = 0; ok_reslevel; reslevelno++) {
|
|
ok_reslevel = 0;
|
|
for (compno = 0; compno < s->ncomponents; compno++) {
|
|
Jpeg2000CodingStyle *codsty = tile->codsty + compno;
|
|
Jpeg2000QuantStyle *qntsty = tile->qntsty + compno;
|
|
if (reslevelno < codsty->nreslevels) {
|
|
Jpeg2000ResLevel *rlevel = tile->comp[compno].reslevel +
|
|
reslevelno;
|
|
ok_reslevel = 1;
|
|
for (precno = 0; precno < rlevel->num_precincts_x * rlevel->num_precincts_y; precno++)
|
|
if ((ret = jpeg2000_decode_packet(s,
|
|
codsty, rlevel,
|
|
precno, layno,
|
|
qntsty->expn + (reslevelno ? 3 * (reslevelno - 1) + 1 : 0),
|
|
qntsty->nguardbits)) < 0)
|
|
return ret;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
|
|
case JPEG2000_PGOD_CPRL:
|
|
for (compno = 0; compno < s->ncomponents; compno++) {
|
|
Jpeg2000CodingStyle *codsty = tile->codsty + compno;
|
|
Jpeg2000QuantStyle *qntsty = tile->qntsty + compno;
|
|
|
|
/* Set bit stream buffer address according to tile-part.
|
|
* For DCinema one tile-part per component, so can be
|
|
* indexed by component. */
|
|
s->g = tile->tile_part[compno].tpg;
|
|
|
|
/* Position loop (y axis)
|
|
* TODO: Automate computing of step 256.
|
|
* Fixed here, but to be computed before entering here. */
|
|
for (y = 0; y < s->height; y += 256) {
|
|
/* Position loop (y axis)
|
|
* TODO: automate computing of step 256.
|
|
* Fixed here, but to be computed before entering here. */
|
|
for (x = 0; x < s->width; x += 256) {
|
|
for (reslevelno = 0; reslevelno < codsty->nreslevels; reslevelno++) {
|
|
uint16_t prcx, prcy;
|
|
uint8_t reducedresno = codsty->nreslevels - 1 -reslevelno; // ==> N_L - r
|
|
Jpeg2000ResLevel *rlevel = tile->comp[compno].reslevel + reslevelno;
|
|
|
|
if (!((y % (1 << (rlevel->log2_prec_height + reducedresno)) == 0) ||
|
|
(y == 0))) // TODO: 2nd condition simplified as try0 always =0 for dcinema
|
|
continue;
|
|
|
|
if (!((x % (1 << (rlevel->log2_prec_width + reducedresno)) == 0) ||
|
|
(x == 0))) // TODO: 2nd condition simplified as try0 always =0 for dcinema
|
|
continue;
|
|
|
|
// check if a precinct exists
|
|
prcx = ff_jpeg2000_ceildivpow2(x, reducedresno) >> rlevel->log2_prec_width;
|
|
prcy = ff_jpeg2000_ceildivpow2(y, reducedresno) >> rlevel->log2_prec_height;
|
|
precno = prcx + rlevel->num_precincts_x * prcy;
|
|
for (layno = 0; layno < tile->codsty[0].nlayers; layno++) {
|
|
if ((ret = jpeg2000_decode_packet(s, codsty, rlevel,
|
|
precno, layno,
|
|
qntsty->expn + (reslevelno ? 3 * (reslevelno - 1) + 1 : 0),
|
|
qntsty->nguardbits)) < 0)
|
|
return ret;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
|
|
case JPEG2000_PGOD_RPCL:
|
|
avpriv_request_sample(s->avctx, "Progression order RPCL");
|
|
ret = AVERROR_PATCHWELCOME;
|
|
break;
|
|
|
|
case JPEG2000_PGOD_PCRL:
|
|
avpriv_request_sample(s->avctx, "Progression order PCRL");
|
|
ret = AVERROR_PATCHWELCOME;
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
/* EOC marker reached */
|
|
bytestream2_skip(&s->g, 2);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/* TIER-1 routines */
|
|
static void decode_sigpass(Jpeg2000T1Context *t1, int width, int height,
|
|
int bpno, int bandno, int bpass_csty_symbol,
|
|
int vert_causal_ctx_csty_symbol)
|
|
{
|
|
int mask = 3 << (bpno - 1), y0, x, y;
|
|
|
|
for (y0 = 0; y0 < height; y0 += 4)
|
|
for (x = 0; x < width; x++)
|
|
for (y = y0; y < height && y < y0 + 4; y++) {
|
|
if ((t1->flags[y+1][x+1] & JPEG2000_T1_SIG_NB)
|
|
&& !(t1->flags[y+1][x+1] & (JPEG2000_T1_SIG | JPEG2000_T1_VIS))) {
|
|
int flags_mask = -1;
|
|
if (vert_causal_ctx_csty_symbol && y == y0 + 3)
|
|
flags_mask &= ~(JPEG2000_T1_SIG_S | JPEG2000_T1_SIG_SW | JPEG2000_T1_SIG_SE);
|
|
if (ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + ff_jpeg2000_getsigctxno(t1->flags[y+1][x+1] & flags_mask, bandno))) {
|
|
int xorbit, ctxno = ff_jpeg2000_getsgnctxno(t1->flags[y+1][x+1], &xorbit);
|
|
if (bpass_csty_symbol)
|
|
t1->data[y][x] = ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + ctxno) ? -mask : mask;
|
|
else
|
|
t1->data[y][x] = (ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + ctxno) ^ xorbit) ?
|
|
-mask : mask;
|
|
|
|
ff_jpeg2000_set_significance(t1, x, y,
|
|
t1->data[y][x] < 0);
|
|
}
|
|
t1->flags[y + 1][x + 1] |= JPEG2000_T1_VIS;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void decode_refpass(Jpeg2000T1Context *t1, int width, int height,
|
|
int bpno)
|
|
{
|
|
int phalf, nhalf;
|
|
int y0, x, y;
|
|
|
|
phalf = 1 << (bpno - 1);
|
|
nhalf = -phalf;
|
|
|
|
for (y0 = 0; y0 < height; y0 += 4)
|
|
for (x = 0; x < width; x++)
|
|
for (y = y0; y < height && y < y0 + 4; y++)
|
|
if ((t1->flags[y + 1][x + 1] & (JPEG2000_T1_SIG | JPEG2000_T1_VIS)) == JPEG2000_T1_SIG) {
|
|
int ctxno = ff_jpeg2000_getrefctxno(t1->flags[y + 1][x + 1]);
|
|
int r = ff_mqc_decode(&t1->mqc,
|
|
t1->mqc.cx_states + ctxno)
|
|
? phalf : nhalf;
|
|
t1->data[y][x] += t1->data[y][x] < 0 ? -r : r;
|
|
t1->flags[y + 1][x + 1] |= JPEG2000_T1_REF;
|
|
}
|
|
}
|
|
|
|
static void decode_clnpass(Jpeg2000DecoderContext *s, Jpeg2000T1Context *t1,
|
|
int width, int height, int bpno, int bandno,
|
|
int seg_symbols, int vert_causal_ctx_csty_symbol)
|
|
{
|
|
int mask = 3 << (bpno - 1), y0, x, y, runlen, dec;
|
|
|
|
for (y0 = 0; y0 < height; y0 += 4) {
|
|
for (x = 0; x < width; x++) {
|
|
if (y0 + 3 < height &&
|
|
!((t1->flags[y0 + 1][x + 1] & (JPEG2000_T1_SIG_NB | JPEG2000_T1_VIS | JPEG2000_T1_SIG)) ||
|
|
(t1->flags[y0 + 2][x + 1] & (JPEG2000_T1_SIG_NB | JPEG2000_T1_VIS | JPEG2000_T1_SIG)) ||
|
|
(t1->flags[y0 + 3][x + 1] & (JPEG2000_T1_SIG_NB | JPEG2000_T1_VIS | JPEG2000_T1_SIG)) ||
|
|
(t1->flags[y0 + 4][x + 1] & (JPEG2000_T1_SIG_NB | JPEG2000_T1_VIS | JPEG2000_T1_SIG)))) {
|
|
if (!ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + MQC_CX_RL))
|
|
continue;
|
|
runlen = ff_mqc_decode(&t1->mqc,
|
|
t1->mqc.cx_states + MQC_CX_UNI);
|
|
runlen = (runlen << 1) | ff_mqc_decode(&t1->mqc,
|
|
t1->mqc.cx_states +
|
|
MQC_CX_UNI);
|
|
dec = 1;
|
|
} else {
|
|
runlen = 0;
|
|
dec = 0;
|
|
}
|
|
|
|
for (y = y0 + runlen; y < y0 + 4 && y < height; y++) {
|
|
if (!dec) {
|
|
if (!(t1->flags[y+1][x+1] & (JPEG2000_T1_SIG | JPEG2000_T1_VIS))) {
|
|
int flags_mask = -1;
|
|
if (vert_causal_ctx_csty_symbol && y == y0 + 3)
|
|
flags_mask &= ~(JPEG2000_T1_SIG_S | JPEG2000_T1_SIG_SW | JPEG2000_T1_SIG_SE);
|
|
dec = ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + ff_jpeg2000_getsigctxno(t1->flags[y+1][x+1] & flags_mask,
|
|
bandno));
|
|
}
|
|
}
|
|
if (dec) {
|
|
int xorbit;
|
|
int ctxno = ff_jpeg2000_getsgnctxno(t1->flags[y + 1][x + 1],
|
|
&xorbit);
|
|
t1->data[y][x] = (ff_mqc_decode(&t1->mqc,
|
|
t1->mqc.cx_states + ctxno) ^
|
|
xorbit)
|
|
? -mask : mask;
|
|
ff_jpeg2000_set_significance(t1, x, y, t1->data[y][x] < 0);
|
|
}
|
|
dec = 0;
|
|
t1->flags[y + 1][x + 1] &= ~JPEG2000_T1_VIS;
|
|
}
|
|
}
|
|
}
|
|
if (seg_symbols) {
|
|
int val;
|
|
val = ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + MQC_CX_UNI);
|
|
val = (val << 1) + ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + MQC_CX_UNI);
|
|
val = (val << 1) + ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + MQC_CX_UNI);
|
|
val = (val << 1) + ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + MQC_CX_UNI);
|
|
if (val != 0xa)
|
|
av_log(s->avctx, AV_LOG_ERROR,
|
|
"Segmentation symbol value incorrect\n");
|
|
}
|
|
}
|
|
|
|
static int decode_cblk(Jpeg2000DecoderContext *s, Jpeg2000CodingStyle *codsty,
|
|
Jpeg2000T1Context *t1, Jpeg2000Cblk *cblk,
|
|
int width, int height, int bandpos)
|
|
{
|
|
int passno = cblk->npasses, pass_t = 2, bpno = cblk->nonzerobits - 1, y;
|
|
int clnpass_cnt = 0;
|
|
int bpass_csty_symbol = codsty->cblk_style & JPEG2000_CBLK_BYPASS;
|
|
int vert_causal_ctx_csty_symbol = codsty->cblk_style & JPEG2000_CBLK_VSC;
|
|
|
|
av_assert0(width <= JPEG2000_MAX_CBLKW);
|
|
av_assert0(height <= JPEG2000_MAX_CBLKH);
|
|
|
|
for (y = 0; y < height; y++)
|
|
memset(t1->data[y], 0, width * sizeof(**t1->data));
|
|
|
|
/* If code-block contains no compressed data: nothing to do. */
|
|
if (!cblk->length)
|
|
return 0;
|
|
|
|
for (y = 0; y < height + 2; y++)
|
|
memset(t1->flags[y], 0, (width + 2) * sizeof(**t1->flags));
|
|
|
|
cblk->data[cblk->length] = 0xff;
|
|
cblk->data[cblk->length+1] = 0xff;
|
|
ff_mqc_initdec(&t1->mqc, cblk->data);
|
|
|
|
while (passno--) {
|
|
switch(pass_t) {
|
|
case 0:
|
|
decode_sigpass(t1, width, height, bpno + 1, bandpos,
|
|
bpass_csty_symbol && (clnpass_cnt >= 4),
|
|
vert_causal_ctx_csty_symbol);
|
|
break;
|
|
case 1:
|
|
decode_refpass(t1, width, height, bpno + 1);
|
|
if (bpass_csty_symbol && clnpass_cnt >= 4)
|
|
ff_mqc_initdec(&t1->mqc, cblk->data);
|
|
break;
|
|
case 2:
|
|
decode_clnpass(s, t1, width, height, bpno + 1, bandpos,
|
|
codsty->cblk_style & JPEG2000_CBLK_SEGSYM,
|
|
vert_causal_ctx_csty_symbol);
|
|
clnpass_cnt = clnpass_cnt + 1;
|
|
if (bpass_csty_symbol && clnpass_cnt >= 4)
|
|
ff_mqc_initdec(&t1->mqc, cblk->data);
|
|
break;
|
|
}
|
|
|
|
pass_t++;
|
|
if (pass_t == 3) {
|
|
bpno--;
|
|
pass_t = 0;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/* TODO: Verify dequantization for lossless case
|
|
* comp->data can be float or int
|
|
* band->stepsize can be float or int
|
|
* depending on the type of DWT transformation.
|
|
* see ISO/IEC 15444-1:2002 A.6.1 */
|
|
|
|
/* Float dequantization of a codeblock.*/
|
|
static void dequantization_float(int x, int y, Jpeg2000Cblk *cblk,
|
|
Jpeg2000Component *comp,
|
|
Jpeg2000T1Context *t1, Jpeg2000Band *band)
|
|
{
|
|
int i, j;
|
|
int w = cblk->coord[0][1] - cblk->coord[0][0];
|
|
for (j = 0; j < (cblk->coord[1][1] - cblk->coord[1][0]); ++j) {
|
|
float *datap = &comp->f_data[(comp->coord[0][1] - comp->coord[0][0]) * (y + j) + x];
|
|
int *src = t1->data[j];
|
|
for (i = 0; i < w; ++i)
|
|
datap[i] = src[i] * band->f_stepsize;
|
|
}
|
|
}
|
|
|
|
/* Integer dequantization of a codeblock.*/
|
|
static void dequantization_int(int x, int y, Jpeg2000Cblk *cblk,
|
|
Jpeg2000Component *comp,
|
|
Jpeg2000T1Context *t1, Jpeg2000Band *band)
|
|
{
|
|
int i, j;
|
|
int w = cblk->coord[0][1] - cblk->coord[0][0];
|
|
for (j = 0; j < (cblk->coord[1][1] - cblk->coord[1][0]); ++j) {
|
|
int32_t *datap = &comp->i_data[(comp->coord[0][1] - comp->coord[0][0]) * (y + j) + x];
|
|
int *src = t1->data[j];
|
|
for (i = 0; i < w; ++i)
|
|
datap[i] = (src[i] * band->i_stepsize + (1 << 14)) >> 15;
|
|
}
|
|
}
|
|
|
|
/* Inverse ICT parameters in float and integer.
|
|
* int value = (float value) * (1<<16) */
|
|
static const float f_ict_params[4] = {
|
|
1.402f,
|
|
0.34413f,
|
|
0.71414f,
|
|
1.772f
|
|
};
|
|
static const int i_ict_params[4] = {
|
|
91881,
|
|
22553,
|
|
46802,
|
|
116130
|
|
};
|
|
|
|
static void mct_decode(Jpeg2000DecoderContext *s, Jpeg2000Tile *tile)
|
|
{
|
|
int i, csize = 1;
|
|
int32_t *src[3], i0, i1, i2;
|
|
float *srcf[3], i0f, i1f, i2f;
|
|
|
|
for (i = 1; i < 3; i++)
|
|
if (tile->codsty[0].transform != tile->codsty[i].transform) {
|
|
av_log(s->avctx, AV_LOG_ERROR, "Transforms mismatch, MCT not supported\n");
|
|
return;
|
|
}
|
|
|
|
for (i = 0; i < 3; i++)
|
|
if (tile->codsty[0].transform == FF_DWT97)
|
|
srcf[i] = tile->comp[i].f_data;
|
|
else
|
|
src [i] = tile->comp[i].i_data;
|
|
|
|
for (i = 0; i < 2; i++)
|
|
csize *= tile->comp[0].coord[i][1] - tile->comp[0].coord[i][0];
|
|
|
|
switch (tile->codsty[0].transform) {
|
|
case FF_DWT97:
|
|
for (i = 0; i < csize; i++) {
|
|
i0f = *srcf[0] + (f_ict_params[0] * *srcf[2]);
|
|
i1f = *srcf[0] - (f_ict_params[1] * *srcf[1])
|
|
- (f_ict_params[2] * *srcf[2]);
|
|
i2f = *srcf[0] + (f_ict_params[3] * *srcf[1]);
|
|
*srcf[0]++ = i0f;
|
|
*srcf[1]++ = i1f;
|
|
*srcf[2]++ = i2f;
|
|
}
|
|
break;
|
|
case FF_DWT97_INT:
|
|
for (i = 0; i < csize; i++) {
|
|
i0 = *src[0] + (((i_ict_params[0] * *src[2]) + (1 << 15)) >> 16);
|
|
i1 = *src[0] - (((i_ict_params[1] * *src[1]) + (1 << 15)) >> 16)
|
|
- (((i_ict_params[2] * *src[2]) + (1 << 15)) >> 16);
|
|
i2 = *src[0] + (((i_ict_params[3] * *src[1]) + (1 << 15)) >> 16);
|
|
*src[0]++ = i0;
|
|
*src[1]++ = i1;
|
|
*src[2]++ = i2;
|
|
}
|
|
break;
|
|
case FF_DWT53:
|
|
for (i = 0; i < csize; i++) {
|
|
i1 = *src[0] - (*src[2] + *src[1] >> 2);
|
|
i0 = i1 + *src[2];
|
|
i2 = i1 + *src[1];
|
|
*src[0]++ = i0;
|
|
*src[1]++ = i1;
|
|
*src[2]++ = i2;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
static int jpeg2000_decode_tile(Jpeg2000DecoderContext *s, Jpeg2000Tile *tile,
|
|
AVFrame *picture)
|
|
{
|
|
int compno, reslevelno, bandno;
|
|
int x, y;
|
|
|
|
uint8_t *line;
|
|
Jpeg2000T1Context t1;
|
|
|
|
/* Loop on tile components */
|
|
for (compno = 0; compno < s->ncomponents; compno++) {
|
|
Jpeg2000Component *comp = tile->comp + compno;
|
|
Jpeg2000CodingStyle *codsty = tile->codsty + compno;
|
|
|
|
/* Loop on resolution levels */
|
|
for (reslevelno = 0; reslevelno < codsty->nreslevels2decode; reslevelno++) {
|
|
Jpeg2000ResLevel *rlevel = comp->reslevel + reslevelno;
|
|
/* Loop on bands */
|
|
for (bandno = 0; bandno < rlevel->nbands; bandno++) {
|
|
int nb_precincts, precno;
|
|
Jpeg2000Band *band = rlevel->band + bandno;
|
|
int cblkno = 0, bandpos;
|
|
|
|
bandpos = bandno + (reslevelno > 0);
|
|
|
|
if (band->coord[0][0] == band->coord[0][1] ||
|
|
band->coord[1][0] == band->coord[1][1])
|
|
continue;
|
|
|
|
nb_precincts = rlevel->num_precincts_x * rlevel->num_precincts_y;
|
|
/* Loop on precincts */
|
|
for (precno = 0; precno < nb_precincts; precno++) {
|
|
Jpeg2000Prec *prec = band->prec + precno;
|
|
|
|
/* Loop on codeblocks */
|
|
for (cblkno = 0; cblkno < prec->nb_codeblocks_width * prec->nb_codeblocks_height; cblkno++) {
|
|
int x, y;
|
|
Jpeg2000Cblk *cblk = prec->cblk + cblkno;
|
|
decode_cblk(s, codsty, &t1, cblk,
|
|
cblk->coord[0][1] - cblk->coord[0][0],
|
|
cblk->coord[1][1] - cblk->coord[1][0],
|
|
bandpos);
|
|
|
|
x = cblk->coord[0][0];
|
|
y = cblk->coord[1][0];
|
|
|
|
if (codsty->transform == FF_DWT97)
|
|
dequantization_float(x, y, cblk, comp, &t1, band);
|
|
else
|
|
dequantization_int(x, y, cblk, comp, &t1, band);
|
|
} /* end cblk */
|
|
} /*end prec */
|
|
} /* end band */
|
|
} /* end reslevel */
|
|
|
|
/* inverse DWT */
|
|
ff_dwt_decode(&comp->dwt, codsty->transform == FF_DWT97 ? (void*)comp->f_data : (void*)comp->i_data);
|
|
} /*end comp */
|
|
|
|
/* inverse MCT transformation */
|
|
if (tile->codsty[0].mct)
|
|
mct_decode(s, tile);
|
|
|
|
if (s->cdef[0] < 0) {
|
|
for (x = 0; x < s->ncomponents; x++)
|
|
s->cdef[x] = x + 1;
|
|
if ((s->ncomponents & 1) == 0)
|
|
s->cdef[s->ncomponents-1] = 0;
|
|
}
|
|
|
|
if (s->precision <= 8) {
|
|
for (compno = 0; compno < s->ncomponents; compno++) {
|
|
Jpeg2000Component *comp = tile->comp + compno;
|
|
Jpeg2000CodingStyle *codsty = tile->codsty + compno;
|
|
float *datap = comp->f_data;
|
|
int32_t *i_datap = comp->i_data;
|
|
int cbps = s->cbps[compno];
|
|
int w = tile->comp[compno].coord[0][1] - s->image_offset_x;
|
|
int planar = !!picture->data[2];
|
|
int pixelsize = planar ? 1 : s->ncomponents;
|
|
int plane = 0;
|
|
|
|
if (planar)
|
|
plane = s->cdef[compno] ? s->cdef[compno]-1 : (s->ncomponents-1);
|
|
|
|
|
|
y = tile->comp[compno].coord[1][0] - s->image_offset_y;
|
|
line = picture->data[plane] + y / s->cdy[compno] * picture->linesize[plane];
|
|
for (; y < tile->comp[compno].coord[1][1] - s->image_offset_y; y += s->cdy[compno]) {
|
|
uint8_t *dst;
|
|
|
|
x = tile->comp[compno].coord[0][0] - s->image_offset_x;
|
|
dst = line + x / s->cdx[compno] * pixelsize + compno*!planar;
|
|
|
|
if (codsty->transform == FF_DWT97) {
|
|
for (; x < w; x += s->cdx[compno]) {
|
|
int val = lrintf(*datap) + (1 << (cbps - 1));
|
|
/* DC level shift and clip see ISO 15444-1:2002 G.1.2 */
|
|
val = av_clip(val, 0, (1 << cbps) - 1);
|
|
*dst = val << (8 - cbps);
|
|
datap++;
|
|
dst += pixelsize;
|
|
}
|
|
} else {
|
|
for (; x < w; x += s->cdx[compno]) {
|
|
int val = *i_datap + (1 << (cbps - 1));
|
|
/* DC level shift and clip see ISO 15444-1:2002 G.1.2 */
|
|
val = av_clip(val, 0, (1 << cbps) - 1);
|
|
*dst = val << (8 - cbps);
|
|
i_datap++;
|
|
dst += pixelsize;
|
|
}
|
|
}
|
|
line += picture->linesize[plane];
|
|
}
|
|
}
|
|
} else {
|
|
for (compno = 0; compno < s->ncomponents; compno++) {
|
|
Jpeg2000Component *comp = tile->comp + compno;
|
|
Jpeg2000CodingStyle *codsty = tile->codsty + compno;
|
|
float *datap = comp->f_data;
|
|
int32_t *i_datap = comp->i_data;
|
|
uint16_t *linel;
|
|
int cbps = s->cbps[compno];
|
|
int w = tile->comp[compno].coord[0][1] - s->image_offset_x;
|
|
int planar = !!picture->data[2];
|
|
int pixelsize = planar ? 1 : s->ncomponents;
|
|
int plane = 0;
|
|
|
|
if (planar)
|
|
plane = s->cdef[compno] ? s->cdef[compno]-1 : (s->ncomponents-1);
|
|
|
|
y = tile->comp[compno].coord[1][0] - s->image_offset_y;
|
|
linel = (uint16_t *)picture->data[plane] + y / s->cdy[compno] * (picture->linesize[plane] >> 1);
|
|
for (; y < tile->comp[compno].coord[1][1] - s->image_offset_y; y += s->cdy[compno]) {
|
|
uint16_t *dst;
|
|
|
|
x = tile->comp[compno].coord[0][0] - s->image_offset_x;
|
|
dst = linel + (x / s->cdx[compno] * pixelsize + compno*!planar);
|
|
if (codsty->transform == FF_DWT97) {
|
|
for (; x < w; x += s-> cdx[compno]) {
|
|
int val = lrintf(*datap) + (1 << (cbps - 1));
|
|
/* DC level shift and clip see ISO 15444-1:2002 G.1.2 */
|
|
val = av_clip(val, 0, (1 << cbps) - 1);
|
|
/* align 12 bit values in little-endian mode */
|
|
*dst = val << (16 - cbps);
|
|
datap++;
|
|
dst += pixelsize;
|
|
}
|
|
} else {
|
|
for (; x < w; x += s-> cdx[compno]) {
|
|
int val = *i_datap + (1 << (cbps - 1));
|
|
/* DC level shift and clip see ISO 15444-1:2002 G.1.2 */
|
|
val = av_clip(val, 0, (1 << cbps) - 1);
|
|
/* align 12 bit values in little-endian mode */
|
|
*dst = val << (16 - cbps);
|
|
i_datap++;
|
|
dst += pixelsize;
|
|
}
|
|
}
|
|
linel += picture->linesize[plane] >> 1;
|
|
}
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void jpeg2000_dec_cleanup(Jpeg2000DecoderContext *s)
|
|
{
|
|
int tileno, compno;
|
|
for (tileno = 0; tileno < s->numXtiles * s->numYtiles; tileno++) {
|
|
if (s->tile[tileno].comp) {
|
|
for (compno = 0; compno < s->ncomponents; compno++) {
|
|
Jpeg2000Component *comp = s->tile[tileno].comp + compno;
|
|
Jpeg2000CodingStyle *codsty = s->tile[tileno].codsty + compno;
|
|
|
|
ff_jpeg2000_cleanup(comp, codsty);
|
|
}
|
|
av_freep(&s->tile[tileno].comp);
|
|
}
|
|
}
|
|
av_freep(&s->tile);
|
|
memset(s->codsty, 0, sizeof(s->codsty));
|
|
memset(s->qntsty, 0, sizeof(s->qntsty));
|
|
s->numXtiles = s->numYtiles = 0;
|
|
}
|
|
|
|
static int jpeg2000_read_main_headers(Jpeg2000DecoderContext *s)
|
|
{
|
|
Jpeg2000CodingStyle *codsty = s->codsty;
|
|
Jpeg2000QuantStyle *qntsty = s->qntsty;
|
|
uint8_t *properties = s->properties;
|
|
|
|
for (;;) {
|
|
int len, ret = 0;
|
|
uint16_t marker;
|
|
int oldpos;
|
|
|
|
if (bytestream2_get_bytes_left(&s->g) < 2) {
|
|
av_log(s->avctx, AV_LOG_ERROR, "Missing EOC\n");
|
|
break;
|
|
}
|
|
|
|
marker = bytestream2_get_be16u(&s->g);
|
|
oldpos = bytestream2_tell(&s->g);
|
|
|
|
if (marker == JPEG2000_SOD) {
|
|
Jpeg2000Tile *tile;
|
|
Jpeg2000TilePart *tp;
|
|
|
|
if (!s->tile) {
|
|
av_log(s->avctx, AV_LOG_ERROR, "Missing SIZ\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
if (s->curtileno < 0) {
|
|
av_log(s->avctx, AV_LOG_ERROR, "Missing SOT\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
tile = s->tile + s->curtileno;
|
|
tp = tile->tile_part + tile->tp_idx;
|
|
if (tp->tp_end < s->g.buffer) {
|
|
av_log(s->avctx, AV_LOG_ERROR, "Invalid tpend\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
bytestream2_init(&tp->tpg, s->g.buffer, tp->tp_end - s->g.buffer);
|
|
bytestream2_skip(&s->g, tp->tp_end - s->g.buffer);
|
|
|
|
continue;
|
|
}
|
|
if (marker == JPEG2000_EOC)
|
|
break;
|
|
|
|
len = bytestream2_get_be16(&s->g);
|
|
if (len < 2 || bytestream2_get_bytes_left(&s->g) < len - 2)
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
switch (marker) {
|
|
case JPEG2000_SIZ:
|
|
ret = get_siz(s);
|
|
if (!s->tile)
|
|
s->numXtiles = s->numYtiles = 0;
|
|
break;
|
|
case JPEG2000_COC:
|
|
ret = get_coc(s, codsty, properties);
|
|
break;
|
|
case JPEG2000_COD:
|
|
ret = get_cod(s, codsty, properties);
|
|
break;
|
|
case JPEG2000_QCC:
|
|
ret = get_qcc(s, len, qntsty, properties);
|
|
break;
|
|
case JPEG2000_QCD:
|
|
ret = get_qcd(s, len, qntsty, properties);
|
|
break;
|
|
case JPEG2000_SOT:
|
|
if (!(ret = get_sot(s, len))) {
|
|
av_assert1(s->curtileno >= 0);
|
|
codsty = s->tile[s->curtileno].codsty;
|
|
qntsty = s->tile[s->curtileno].qntsty;
|
|
properties = s->tile[s->curtileno].properties;
|
|
}
|
|
break;
|
|
case JPEG2000_COM:
|
|
// the comment is ignored
|
|
bytestream2_skip(&s->g, len - 2);
|
|
break;
|
|
case JPEG2000_TLM:
|
|
// Tile-part lengths
|
|
ret = get_tlm(s, len);
|
|
break;
|
|
default:
|
|
av_log(s->avctx, AV_LOG_ERROR,
|
|
"unsupported marker 0x%.4X at pos 0x%X\n",
|
|
marker, bytestream2_tell(&s->g) - 4);
|
|
bytestream2_skip(&s->g, len - 2);
|
|
break;
|
|
}
|
|
if (bytestream2_tell(&s->g) - oldpos != len || ret) {
|
|
av_log(s->avctx, AV_LOG_ERROR,
|
|
"error during processing marker segment %.4x\n", marker);
|
|
return ret ? ret : -1;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/* Read bit stream packets --> T2 operation. */
|
|
static int jpeg2000_read_bitstream_packets(Jpeg2000DecoderContext *s)
|
|
{
|
|
int ret = 0;
|
|
int tileno;
|
|
|
|
for (tileno = 0; tileno < s->numXtiles * s->numYtiles; tileno++) {
|
|
Jpeg2000Tile *tile = s->tile + tileno;
|
|
|
|
if (ret = init_tile(s, tileno))
|
|
return ret;
|
|
|
|
s->g = tile->tile_part[0].tpg;
|
|
if (ret = jpeg2000_decode_packets(s, tile))
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int jp2_find_codestream(Jpeg2000DecoderContext *s)
|
|
{
|
|
uint32_t atom_size, atom, atom_end;
|
|
int search_range = 10;
|
|
|
|
while (search_range
|
|
&&
|
|
bytestream2_get_bytes_left(&s->g) >= 8) {
|
|
atom_size = bytestream2_get_be32u(&s->g);
|
|
atom = bytestream2_get_be32u(&s->g);
|
|
atom_end = bytestream2_tell(&s->g) + atom_size - 8;
|
|
|
|
if (atom == JP2_CODESTREAM)
|
|
return 1;
|
|
|
|
if (bytestream2_get_bytes_left(&s->g) < atom_size || atom_end < atom_size)
|
|
return 0;
|
|
|
|
if (atom == JP2_HEADER &&
|
|
atom_size >= 16) {
|
|
uint32_t atom2_size, atom2, atom2_end;
|
|
do {
|
|
atom2_size = bytestream2_get_be32u(&s->g);
|
|
atom2 = bytestream2_get_be32u(&s->g);
|
|
atom2_end = bytestream2_tell(&s->g) + atom2_size - 8;
|
|
if (atom2_size < 8 || atom2_end > atom_end || atom2_end < atom2_size)
|
|
break;
|
|
if (atom2 == JP2_CODESTREAM) {
|
|
return 1;
|
|
} else if (atom2 == MKBETAG('c','o','l','r') && atom2_size >= 7) {
|
|
int method = bytestream2_get_byteu(&s->g);
|
|
bytestream2_skipu(&s->g, 2);
|
|
if (method == 1) {
|
|
s->colour_space = bytestream2_get_be32u(&s->g);
|
|
}
|
|
} else if (atom2 == MKBETAG('p','c','l','r') && atom2_size >= 6) {
|
|
int i, size, colour_count, colour_channels, colour_depth[3];
|
|
uint32_t r, g, b;
|
|
colour_count = bytestream2_get_be16u(&s->g);
|
|
colour_channels = bytestream2_get_byteu(&s->g);
|
|
// FIXME: Do not ignore channel_sign
|
|
colour_depth[0] = (bytestream2_get_byteu(&s->g) & 0x7f) + 1;
|
|
colour_depth[1] = (bytestream2_get_byteu(&s->g) & 0x7f) + 1;
|
|
colour_depth[2] = (bytestream2_get_byteu(&s->g) & 0x7f) + 1;
|
|
size = (colour_depth[0] + 7 >> 3) * colour_count +
|
|
(colour_depth[1] + 7 >> 3) * colour_count +
|
|
(colour_depth[2] + 7 >> 3) * colour_count;
|
|
if (colour_count > 256 ||
|
|
colour_channels != 3 ||
|
|
colour_depth[0] > 16 ||
|
|
colour_depth[1] > 16 ||
|
|
colour_depth[2] > 16 ||
|
|
atom2_size < size) {
|
|
avpriv_request_sample(s->avctx, "Unknown palette");
|
|
bytestream2_seek(&s->g, atom2_end, SEEK_SET);
|
|
continue;
|
|
}
|
|
s->pal8 = 1;
|
|
for (i = 0; i < colour_count; i++) {
|
|
if (colour_depth[0] <= 8) {
|
|
r = bytestream2_get_byteu(&s->g) << 8 - colour_depth[0];
|
|
r |= r >> colour_depth[0];
|
|
} else {
|
|
r = bytestream2_get_be16u(&s->g) >> colour_depth[0] - 8;
|
|
}
|
|
if (colour_depth[1] <= 8) {
|
|
g = bytestream2_get_byteu(&s->g) << 8 - colour_depth[1];
|
|
r |= r >> colour_depth[1];
|
|
} else {
|
|
g = bytestream2_get_be16u(&s->g) >> colour_depth[1] - 8;
|
|
}
|
|
if (colour_depth[2] <= 8) {
|
|
b = bytestream2_get_byteu(&s->g) << 8 - colour_depth[2];
|
|
r |= r >> colour_depth[2];
|
|
} else {
|
|
b = bytestream2_get_be16u(&s->g) >> colour_depth[2] - 8;
|
|
}
|
|
s->palette[i] = 0xffu << 24 | r << 16 | g << 8 | b;
|
|
}
|
|
} else if (atom2 == MKBETAG('c','d','e','f') && atom2_size >= 2) {
|
|
int n = bytestream2_get_be16u(&s->g);
|
|
for (; n>0; n--) {
|
|
int cn = bytestream2_get_be16(&s->g);
|
|
int av_unused typ = bytestream2_get_be16(&s->g);
|
|
int asoc = bytestream2_get_be16(&s->g);
|
|
if (cn < 4 || asoc < 4)
|
|
s->cdef[cn] = asoc;
|
|
}
|
|
}
|
|
bytestream2_seek(&s->g, atom2_end, SEEK_SET);
|
|
} while (atom_end - atom2_end >= 8);
|
|
} else {
|
|
search_range--;
|
|
}
|
|
bytestream2_seek(&s->g, atom_end, SEEK_SET);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int jpeg2000_decode_frame(AVCodecContext *avctx, void *data,
|
|
int *got_frame, AVPacket *avpkt)
|
|
{
|
|
Jpeg2000DecoderContext *s = avctx->priv_data;
|
|
ThreadFrame frame = { .f = data };
|
|
AVFrame *picture = data;
|
|
int tileno, ret;
|
|
|
|
s->avctx = avctx;
|
|
bytestream2_init(&s->g, avpkt->data, avpkt->size);
|
|
s->curtileno = -1;
|
|
memset(s->cdef, -1, sizeof(s->cdef));
|
|
|
|
if (bytestream2_get_bytes_left(&s->g) < 2) {
|
|
ret = AVERROR_INVALIDDATA;
|
|
goto end;
|
|
}
|
|
|
|
// check if the image is in jp2 format
|
|
if (bytestream2_get_bytes_left(&s->g) >= 12 &&
|
|
(bytestream2_get_be32u(&s->g) == 12) &&
|
|
(bytestream2_get_be32u(&s->g) == JP2_SIG_TYPE) &&
|
|
(bytestream2_get_be32u(&s->g) == JP2_SIG_VALUE)) {
|
|
if (!jp2_find_codestream(s)) {
|
|
av_log(avctx, AV_LOG_ERROR,
|
|
"Could not find Jpeg2000 codestream atom.\n");
|
|
ret = AVERROR_INVALIDDATA;
|
|
goto end;
|
|
}
|
|
} else {
|
|
bytestream2_seek(&s->g, 0, SEEK_SET);
|
|
}
|
|
|
|
while (bytestream2_get_bytes_left(&s->g) >= 3 && bytestream2_peek_be16(&s->g) != JPEG2000_SOC)
|
|
bytestream2_skip(&s->g, 1);
|
|
|
|
if (bytestream2_get_be16u(&s->g) != JPEG2000_SOC) {
|
|
av_log(avctx, AV_LOG_ERROR, "SOC marker not present\n");
|
|
ret = AVERROR_INVALIDDATA;
|
|
goto end;
|
|
}
|
|
if (ret = jpeg2000_read_main_headers(s))
|
|
goto end;
|
|
|
|
/* get picture buffer */
|
|
if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0)
|
|
goto end;
|
|
picture->pict_type = AV_PICTURE_TYPE_I;
|
|
picture->key_frame = 1;
|
|
|
|
if (ret = jpeg2000_read_bitstream_packets(s))
|
|
goto end;
|
|
|
|
for (tileno = 0; tileno < s->numXtiles * s->numYtiles; tileno++)
|
|
if (ret = jpeg2000_decode_tile(s, s->tile + tileno, picture))
|
|
goto end;
|
|
|
|
jpeg2000_dec_cleanup(s);
|
|
|
|
*got_frame = 1;
|
|
|
|
if (s->avctx->pix_fmt == AV_PIX_FMT_PAL8)
|
|
memcpy(picture->data[1], s->palette, 256 * sizeof(uint32_t));
|
|
|
|
return bytestream2_tell(&s->g);
|
|
|
|
end:
|
|
jpeg2000_dec_cleanup(s);
|
|
return ret;
|
|
}
|
|
|
|
static void jpeg2000_init_static_data(AVCodec *codec)
|
|
{
|
|
ff_jpeg2000_init_tier1_luts();
|
|
ff_mqc_init_context_tables();
|
|
}
|
|
|
|
#define OFFSET(x) offsetof(Jpeg2000DecoderContext, x)
|
|
#define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
|
|
|
|
static const AVOption options[] = {
|
|
{ "lowres", "Lower the decoding resolution by a power of two",
|
|
OFFSET(reduction_factor), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, JPEG2000_MAX_RESLEVELS - 1, VD },
|
|
{ NULL },
|
|
};
|
|
|
|
static const AVProfile profiles[] = {
|
|
{ FF_PROFILE_JPEG2000_CSTREAM_RESTRICTION_0, "JPEG 2000 codestream restriction 0" },
|
|
{ FF_PROFILE_JPEG2000_CSTREAM_RESTRICTION_1, "JPEG 2000 codestream restriction 1" },
|
|
{ FF_PROFILE_JPEG2000_CSTREAM_NO_RESTRICTION, "JPEG 2000 no codestream restrictions" },
|
|
{ FF_PROFILE_JPEG2000_DCINEMA_2K, "JPEG 2000 digital cinema 2K" },
|
|
{ FF_PROFILE_JPEG2000_DCINEMA_4K, "JPEG 2000 digital cinema 4K" },
|
|
{ FF_PROFILE_UNKNOWN },
|
|
};
|
|
|
|
static const AVClass jpeg2000_class = {
|
|
.class_name = "jpeg2000",
|
|
.item_name = av_default_item_name,
|
|
.option = options,
|
|
.version = LIBAVUTIL_VERSION_INT,
|
|
};
|
|
|
|
AVCodec ff_jpeg2000_decoder = {
|
|
.name = "jpeg2000",
|
|
.long_name = NULL_IF_CONFIG_SMALL("JPEG 2000"),
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.id = AV_CODEC_ID_JPEG2000,
|
|
.capabilities = CODEC_CAP_FRAME_THREADS,
|
|
.priv_data_size = sizeof(Jpeg2000DecoderContext),
|
|
.init_static_data = jpeg2000_init_static_data,
|
|
.decode = jpeg2000_decode_frame,
|
|
.priv_class = &jpeg2000_class,
|
|
.max_lowres = 5,
|
|
.profiles = NULL_IF_CONFIG_SMALL(profiles)
|
|
};
|