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1353 lines
47 KiB
1353 lines
47 KiB
/* |
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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 Libav. |
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* |
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* Libav 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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* Libav 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 Libav; 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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/** |
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* @file |
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* JPEG 2000 image decoder |
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*/ |
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|
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#include "libavutil/common.h" |
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#include "libavutil/opt.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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|
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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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|
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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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uint16_t tp_idx; // Tile-part index |
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uint8_t tile_index; // Tile index who refers the tile-part |
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uint32_t tp_len; // Length of tile-part |
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const uint8_t *tp_start_bstrm; // Start address bit stream in tile-part |
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const uint8_t *tp_end_bstrm; // End address of the bit stream tile part |
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} Jpeg2000TilePart; |
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|
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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[3]; |
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} Jpeg2000Tile; |
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|
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typedef struct Jpeg2000DecoderContext { |
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AVClass *class; |
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AVCodecContext *avctx; |
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|
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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 tile_width, tile_height; |
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int 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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const uint8_t *buf_start; |
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const uint8_t *buf; |
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const uint8_t *buf_end; |
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int bit_index; |
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int16_t curtileno; |
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Jpeg2000Tile *tile; |
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|
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/*options parameters*/ |
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int16_t lowres; |
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int16_t reduction_factor; |
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} Jpeg2000DecoderContext; |
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|
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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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if (s->buf_end - s->buf < ((n - s->bit_index) >> 8)) |
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return AVERROR(EINVAL); |
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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 + (*s->buf != 0xff); |
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s->buf++; |
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} |
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s->bit_index--; |
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res |= (*s->buf >> s->bit_index) & 1; |
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} |
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return res; |
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} |
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|
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static void jpeg2000_flush(Jpeg2000DecoderContext *s) |
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{ |
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if (*s->buf == 0xff) |
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s->buf++; |
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s->bit_index = 8; |
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s->buf++; |
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} |
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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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|
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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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|
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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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|
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if (s->buf_end - s->buf < 36) |
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return AVERROR(EINVAL); |
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|
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s->avctx->profile = bytestream_get_be16(&s->buf); // Rsiz |
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s->width = bytestream_get_be32(&s->buf); // Width |
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s->height = bytestream_get_be32(&s->buf); // Height |
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s->image_offset_x = bytestream_get_be32(&s->buf); // X0Siz |
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s->image_offset_y = bytestream_get_be32(&s->buf); // Y0Siz |
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s->tile_width = bytestream_get_be32(&s->buf); // XTSiz |
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s->tile_height = bytestream_get_be32(&s->buf); // YTSiz |
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s->tile_offset_x = bytestream_get_be32(&s->buf); // XT0Siz |
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s->tile_offset_y = bytestream_get_be32(&s->buf); // YT0Siz |
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s->ncomponents = bytestream_get_be16(&s->buf); // CSiz |
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if (s->buf_end - s->buf < 2 * s->ncomponents) |
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return AVERROR(EINVAL); |
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for (i = 0; i < s->ncomponents; i++) { // Ssiz_i XRsiz_i, YRsiz_i |
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uint8_t x = bytestream_get_byte(&s->buf); |
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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) == 1; |
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s->cdx[i] = bytestream_get_byte(&s->buf); |
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s->cdy[i] = bytestream_get_byte(&s->buf); |
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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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s->tile = av_mallocz(s->numXtiles * s->numYtiles * sizeof(*s->tile)); |
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if (!s->tile) |
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return AVERROR(ENOMEM); |
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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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|
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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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|
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switch (s->avctx->profile) { |
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case FF_PROFILE_JPEG2000_DCINEMA_2K: |
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case FF_PROFILE_JPEG2000_DCINEMA_4K: |
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/* XYZ color-space for digital cinema profiles */ |
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s->avctx->pix_fmt = AV_PIX_FMT_XYZ12; |
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break; |
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default: |
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/* For other profiles selects color-space according number of |
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* components and bit depth precision. */ |
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switch (s->ncomponents) { |
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case 1: |
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if (s->precision > 8) |
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s->avctx->pix_fmt = AV_PIX_FMT_GRAY16; |
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else |
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s->avctx->pix_fmt = AV_PIX_FMT_GRAY8; |
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break; |
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case 3: |
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if (s->precision > 8) |
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s->avctx->pix_fmt = AV_PIX_FMT_RGB48; |
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else |
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s->avctx->pix_fmt = AV_PIX_FMT_RGB24; |
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break; |
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case 4: |
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s->avctx->pix_fmt = AV_PIX_FMT_BGRA; |
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break; |
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default: |
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/* pixel format can not be identified */ |
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s->avctx->pix_fmt = AV_PIX_FMT_NONE; |
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break; |
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} |
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break; |
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} |
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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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|
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if (s->buf_end - s->buf < 5) |
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return AVERROR(EINVAL); |
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c->nreslevels = bytestream_get_byte(&s->buf) + 1; // num of resolution levels - 1 |
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|
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/* compute number of resolution levels to decode */ |
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if (c->nreslevels < s->reduction_factor) |
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c->nreslevels2decode = 1; |
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else |
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c->nreslevels2decode = c->nreslevels - s->reduction_factor; |
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c->log2_cblk_width = bytestream_get_byte(&s->buf) + 2; // cblk width |
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c->log2_cblk_height = bytestream_get_byte(&s->buf) + 2; // cblk height |
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c->cblk_style = bytestream_get_byte(&s->buf); |
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if (c->cblk_style != 0) { // cblk style |
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av_log(s->avctx, AV_LOG_ERROR, "no extra cblk styles supported\n"); |
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return -1; |
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} |
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c->transform = bytestream_get_byte(&s->buf); // 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 = bytestream_get_byte(&s->buf); |
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c->log2_prec_widths[i] = byte & 0x0F; // precinct PPx |
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c->log2_prec_heights[i] = (byte >> 4) & 0x0F; // precinct PPy |
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} |
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} |
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return 0; |
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} |
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/* get coding parameters for a particular tile or whole image*/ |
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static int get_cod(Jpeg2000DecoderContext *s, Jpeg2000CodingStyle *c, |
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uint8_t *properties) |
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{ |
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Jpeg2000CodingStyle tmp; |
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int compno; |
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|
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if (s->buf_end - s->buf < 5) |
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return AVERROR(EINVAL); |
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tmp.log2_prec_width = |
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tmp.log2_prec_height = 15; |
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tmp.csty = bytestream_get_byte(&s->buf); |
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// get progression order |
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tmp.prog_order = bytestream_get_byte(&s->buf); |
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tmp.nlayers = bytestream_get_be16(&s->buf); |
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tmp.mct = bytestream_get_byte(&s->buf); // multiple component transformation |
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get_cox(s, &tmp); |
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for (compno = 0; compno < s->ncomponents; compno++) |
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if (!(properties[compno] & HAD_COC)) |
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memcpy(c + compno, &tmp, sizeof(tmp)); |
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return 0; |
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} |
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|
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/* Get coding parameters for a component in the whole image or a |
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* particular tile. */ |
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static int get_coc(Jpeg2000DecoderContext *s, Jpeg2000CodingStyle *c, |
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uint8_t *properties) |
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{ |
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int compno; |
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|
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if (s->buf_end - s->buf < 2) |
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return AVERROR(EINVAL); |
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compno = bytestream_get_byte(&s->buf); |
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c += compno; |
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c->csty = bytestream_get_byte(&s->buf); |
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get_cox(s, c); |
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properties[compno] |= HAD_COC; |
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return 0; |
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} |
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/* Get common part for QCD and QCC segments. */ |
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static int get_qcx(Jpeg2000DecoderContext *s, int n, Jpeg2000QuantStyle *q) |
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{ |
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int i, x; |
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|
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if (s->buf_end - s->buf < 1) |
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return AVERROR(EINVAL); |
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|
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x = bytestream_get_byte(&s->buf); // Sqcd |
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|
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q->nguardbits = x >> 5; |
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q->quantsty = x & 0x1f; |
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|
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if (q->quantsty == JPEG2000_QSTY_NONE) { |
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n -= 3; |
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if (s->buf_end - s->buf < n) |
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return AVERROR(EINVAL); |
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for (i = 0; i < n; i++) |
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q->expn[i] = bytestream_get_byte(&s->buf) >> 3; |
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} else if (q->quantsty == JPEG2000_QSTY_SI) { |
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if (s->buf_end - s->buf < 2) |
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return AVERROR(EINVAL); |
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x = bytestream_get_be16(&s->buf); |
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q->expn[0] = x >> 11; |
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q->mant[0] = x & 0x7ff; |
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for (i = 1; i < 32 * 3; i++) { |
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int curexpn = FFMAX(0, q->expn[0] - (i - 1) / 3); |
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q->expn[i] = curexpn; |
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q->mant[i] = q->mant[0]; |
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} |
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} else { |
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n = (n - 3) >> 1; |
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if (s->buf_end - s->buf < n) |
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return AVERROR(EINVAL); |
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for (i = 0; i < n; i++) { |
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x = bytestream_get_be16(&s->buf); |
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q->expn[i] = x >> 11; |
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q->mant[i] = x & 0x7ff; |
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} |
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} |
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return 0; |
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} |
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|
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/* Get quantization parameters for a particular tile or a whole image. */ |
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static int get_qcd(Jpeg2000DecoderContext *s, int n, Jpeg2000QuantStyle *q, |
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uint8_t *properties) |
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{ |
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Jpeg2000QuantStyle tmp; |
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int compno; |
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|
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if (get_qcx(s, n, &tmp)) |
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return -1; |
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for (compno = 0; compno < s->ncomponents; compno++) |
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if (!(properties[compno] & HAD_QCC)) |
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memcpy(q + compno, &tmp, sizeof(tmp)); |
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return 0; |
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} |
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|
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/* Get quantization parameters for a component in the whole image |
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* on in a particular tile. */ |
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static int get_qcc(Jpeg2000DecoderContext *s, int n, Jpeg2000QuantStyle *q, |
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uint8_t *properties) |
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{ |
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int compno; |
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|
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if (s->buf_end - s->buf < 1) |
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return AVERROR(EINVAL); |
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|
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compno = bytestream_get_byte(&s->buf); |
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properties[compno] |= HAD_QCC; |
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return get_qcx(s, n - 1, q + compno); |
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} |
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|
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/* Get start of tile segment. */ |
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static uint8_t get_sot(Jpeg2000DecoderContext *s, int n) |
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{ |
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Jpeg2000TilePart *tp; |
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uint16_t Isot; |
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uint32_t Psot; |
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uint8_t TPsot; |
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|
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if (s->buf_end - s->buf < 4) |
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return AVERROR(EINVAL); |
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|
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Isot = bytestream_get_be16(&s->buf); // Isot |
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if (Isot) { |
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av_log(s->avctx, AV_LOG_ERROR, |
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"Not a DCINEMA JP2K file: more than one tile\n"); |
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return -1; |
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} |
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Psot = bytestream_get_be32(&s->buf); // Psot |
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TPsot = bytestream_get_byte(&s->buf); // TPsot |
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|
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/* Read TNSot but not used */ |
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bytestream_get_byte(&s->buf); // TNsot |
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|
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tp = s->tile[s->curtileno].tile_part + TPsot; |
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tp->tile_index = Isot; |
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tp->tp_len = Psot; |
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tp->tp_idx = TPsot; |
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|
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/* Start of bit stream. Pointer to SOD marker |
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* Check SOD marker is present. */ |
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if (JPEG2000_SOD == bytestream_get_be16(&s->buf)) |
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tp->tp_start_bstrm = s->buf; |
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else { |
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av_log(s->avctx, AV_LOG_ERROR, "SOD marker not found \n"); |
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return -1; |
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} |
|
|
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/* End address of bit stream = |
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* start address + (Psot - size of SOT HEADER(n) |
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* - size of SOT MARKER(2) - size of SOD marker(2) */ |
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tp->tp_end_bstrm = s->buf + (tp->tp_len - n - 4); |
|
|
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// set buffer pointer to end of tile part header |
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s->buf = tp->tp_end_bstrm; |
|
|
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return 0; |
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} |
|
|
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/* Tile-part lengths: see ISO 15444-1:2002, section A.7.1 |
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* Used to know the number of tile parts and lengths. |
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* There may be multiple TLMs in the header. |
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* 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 |
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* markers. Parsing the TLM header is needed to increment the input header |
|
* buffer. |
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* This marker is mandatory for DCI. */ |
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static uint8_t get_tlm(Jpeg2000DecoderContext *s, int n) |
|
{ |
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uint8_t Stlm, ST, SP, tile_tlm, i; |
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bytestream_get_byte(&s->buf); /* Ztlm: skipped */ |
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Stlm = bytestream_get_byte(&s->buf); |
|
|
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// too complex ? ST = ((Stlm >> 4) & 0x01) + ((Stlm >> 4) & 0x02); |
|
ST = (Stlm >> 4) & 0x03; |
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// TODO: Manage case of ST = 0b11 --> raise error |
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SP = (Stlm >> 6) & 0x01; |
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tile_tlm = (n - 4) / ((SP + 1) * 2 + ST); |
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for (i = 0; i < tile_tlm; i++) { |
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switch (ST) { |
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case 0: |
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break; |
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case 1: |
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bytestream_get_byte(&s->buf); |
|
break; |
|
case 2: |
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bytestream_get_be16(&s->buf); |
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break; |
|
case 3: |
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bytestream_get_be32(&s->buf); |
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break; |
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} |
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if (SP == 0) { |
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bytestream_get_be16(&s->buf); |
|
} else { |
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bytestream_get_be32(&s->buf); |
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} |
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} |
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return 0; |
|
} |
|
|
|
static int init_tile(Jpeg2000DecoderContext *s, int tileno) |
|
{ |
|
int compno; |
|
int tilex = tileno % s->numXtiles; |
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int tiley = tileno / s->numXtiles; |
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Jpeg2000Tile *tile = s->tile + tileno; |
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Jpeg2000CodingStyle *codsty; |
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Jpeg2000QuantStyle *qntsty; |
|
|
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if (!tile->comp) |
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return AVERROR(ENOMEM); |
|
|
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/* copy codsty, qnsty to tile. TODO: Is it the best way? |
|
* codsty, qnsty is an array of 4 structs Jpeg2000CodingStyle |
|
* and Jpeg2000QuantStyle */ |
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memcpy(tile->codsty, s->codsty, s->ncomponents * sizeof(*codsty)); |
|
memcpy(tile->qntsty, s->qntsty, s->ncomponents * sizeof(*qntsty)); |
|
|
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for (compno = 0; compno < s->ncomponents; compno++) { |
|
Jpeg2000Component *comp = tile->comp + compno; |
|
int ret; // global bandno |
|
codsty = tile->codsty + compno; |
|
qntsty = tile->qntsty + compno; |
|
|
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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); |
|
|
|
// FIXME: add a dcinema profile check ? |
|
// value is guaranteed by profile (orig=0, 1 tile) |
|
comp->coord[0][0] = 0; |
|
comp->coord[0][1] = s->avctx->width; |
|
comp->coord[1][0] = 0; |
|
comp->coord[1][1] = s->avctx->height; |
|
|
|
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; |
|
prec->yi0 = 0; |
|
prec->xi0 = 0; |
|
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) |
|
cblk->nonzerobits = expn[bandno] + numgbits - 1 - |
|
tag_tree_decode(s, prec->zerobits + cblkno, |
|
100); |
|
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; |
|
cblk->lengthinc = ret; |
|
cblk->npasses += newpasses; |
|
} |
|
} |
|
jpeg2000_flush(s); |
|
|
|
if (codsty->csty & JPEG2000_CSTY_EPH) { |
|
if (AV_RB16(s->buf) == JPEG2000_EPH) |
|
s->buf += 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 (s->buf_end - s->buf < cblk->lengthinc) |
|
return AVERROR(EINVAL); |
|
/* Code-block data can be empty. In that case initialize data |
|
* with 0xFFFF. */ |
|
if (cblk->lengthinc > 0) { |
|
bytestream_get_buffer(&s->buf, cblk->data, cblk->lengthinc); |
|
} else { |
|
cblk->data[0] = 0xFF; |
|
cblk->data[1] = 0xFF; |
|
} |
|
cblk->length += cblk->lengthinc; |
|
cblk->lengthinc = 0; |
|
} |
|
} |
|
return 0; |
|
} |
|
|
|
static int jpeg2000_decode_packets(Jpeg2000DecoderContext *s, Jpeg2000Tile *tile) |
|
{ |
|
int layno, reslevelno, compno, precno, ok_reslevel; |
|
uint8_t prog_order = tile->codsty[0].prog_order; |
|
uint16_t x; |
|
uint16_t y; |
|
|
|
s->bit_index = 8; |
|
switch (prog_order) { |
|
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 (jpeg2000_decode_packet(s, |
|
codsty, rlevel, |
|
precno, layno, |
|
qntsty->expn + (reslevelno ? 3 * (reslevelno - 1) + 1 : 0), |
|
qntsty->nguardbits)) |
|
return -1; |
|
} |
|
} |
|
} |
|
} |
|
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->buf = tile->tile_part[compno].tp_start_bstrm; |
|
|
|
/* 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 (jpeg2000_decode_packet(s, codsty, rlevel, |
|
precno, layno, |
|
qntsty->expn + (reslevelno ? 3 * (reslevelno - 1) + 1 : 0), |
|
qntsty->nguardbits)) |
|
return -1; |
|
} |
|
} |
|
} |
|
} |
|
} |
|
break; |
|
|
|
default: |
|
break; |
|
} |
|
|
|
/* EOC marker reached */ |
|
s->buf += 2; |
|
|
|
return 0; |
|
} |
|
|
|
/* TIER-1 routines */ |
|
static void decode_sigpass(Jpeg2000T1Context *t1, int width, int height, |
|
int bpno, int bandno) |
|
{ |
|
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))) { |
|
if (ff_mqc_decode(&t1->mqc, |
|
t1->mqc.cx_states + |
|
ff_jpeg2000_getsigctxno(t1->flags[y + 1][x + 1], |
|
bandno))) { |
|
int xorbit, 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); |
|
} |
|
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 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))) |
|
dec = ff_mqc_decode(&t1->mqc, |
|
t1->mqc.cx_states + |
|
ff_jpeg2000_getsigctxno(t1->flags[y + 1][x + 1], |
|
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; |
|
|
|
for (y = 0; y < height; y++) |
|
memset(t1->data[y], 0, width * sizeof(width)); |
|
/* 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(width)); |
|
|
|
ff_mqc_initdec(&t1->mqc, cblk->data); |
|
cblk->data[cblk->length] = 0xff; |
|
cblk->data[cblk->length + 1] = 0xff; |
|
|
|
while (passno--) { |
|
switch (pass_t) { |
|
case 0: |
|
decode_sigpass(t1, width, height, bpno + 1, bandpos); |
|
break; |
|
case 1: |
|
decode_refpass(t1, width, height, bpno + 1); |
|
break; |
|
case 2: |
|
decode_clnpass(s, t1, width, height, bpno + 1, bandpos, |
|
codsty->cblk_style & JPEG2000_CBLK_SEGSYM); |
|
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, idx; |
|
float *datap = &comp->data[(comp->coord[0][1] - comp->coord[0][0]) * y + x]; |
|
for (j = 0; j < (cblk->coord[1][1] - cblk->coord[1][0]); ++j) |
|
for (i = 0; i < (cblk->coord[0][1] - cblk->coord[0][0]); ++i) { |
|
idx = (comp->coord[0][1] - comp->coord[0][0]) * j + i; |
|
datap[idx] = (float)(t1->data[j][i]) * ((float)band->stepsize); |
|
} |
|
return; |
|
} |
|
|
|
/* Integer dequantization of a codeblock.*/ |
|
static void dequantization_int(int x, int y, Jpeg2000Cblk *cblk, |
|
Jpeg2000Component *comp, |
|
Jpeg2000T1Context *t1, Jpeg2000Band *band) |
|
{ |
|
int i, j, idx; |
|
int32_t *datap = |
|
(int32_t *) &comp->data[(comp->coord[0][1] - comp->coord[0][0]) * y + x]; |
|
for (j = 0; j < (cblk->coord[1][1] - cblk->coord[1][0]); ++j) |
|
for (i = 0; i < (cblk->coord[0][1] - cblk->coord[0][0]); ++i) { |
|
idx = (comp->coord[0][1] - comp->coord[0][0]) * j + i; |
|
datap[idx] = |
|
((int32_t)(t1->data[j][i]) * ((int32_t)band->stepsize) + (1 << 15)) >> 16; |
|
} |
|
return; |
|
} |
|
|
|
/* 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 int mct_decode(Jpeg2000DecoderContext *s, Jpeg2000Tile *tile) |
|
{ |
|
int i, csize = 1; |
|
int ret = 0; |
|
int32_t *src[3], i0, i1, i2; |
|
float *srcf[3], i0f, i1f, i2f; |
|
|
|
for (i = 0; i < 3; i++) |
|
if (tile->codsty[0].transform == FF_DWT97) |
|
srcf[i] = tile->comp[i].data; |
|
else |
|
src[i] = (int32_t *)tile->comp[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; |
|
} |
|
return ret; |
|
} |
|
|
|
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++) { |
|
uint16_t nb_precincts, precno; |
|
Jpeg2000Band *band = rlevel->band + bandno; |
|
int cblkno = 0, bandpos; |
|
bandpos = bandno + (reslevelno > 0); |
|
|
|
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); |
|
|
|
/* Manage band offsets */ |
|
x = cblk->coord[0][0]; |
|
y = cblk->coord[1][0]; |
|
if ((reslevelno > 0) && ((bandno + 1) & 1)) { |
|
Jpeg2000ResLevel *pres = comp->reslevel + (reslevelno - 1); |
|
x += pres->coord[0][1] - pres->coord[0][0]; |
|
} |
|
if ((reslevelno > 0) && ((bandno + 1) & 2)) { |
|
Jpeg2000ResLevel *pres = comp->reslevel + (reslevelno - 1); |
|
y += pres->coord[1][1] - pres->coord[1][0]; |
|
} |
|
|
|
if (s->avctx->flags & CODEC_FLAG_BITEXACT) |
|
dequantization_int(x, y, cblk, comp, &t1, band); |
|
else |
|
dequantization_float(x, y, cblk, comp, &t1, band); |
|
} /* end cblk */ |
|
} /*end prec */ |
|
} /* end band */ |
|
} /* end reslevel */ |
|
|
|
/* inverse DWT */ |
|
ff_dwt_decode(&comp->dwt, comp->data); |
|
} /*end comp */ |
|
|
|
/* inverse MCT transformation */ |
|
if (tile->codsty[0].mct) |
|
mct_decode(s, tile); |
|
|
|
if (s->avctx->pix_fmt == PIX_FMT_BGRA) // RGBA -> BGRA |
|
FFSWAP(float *, tile->comp[0].data, tile->comp[2].data); |
|
|
|
if (s->precision <= 8) { |
|
for (compno = 0; compno < s->ncomponents; compno++) { |
|
Jpeg2000Component *comp = tile->comp + compno; |
|
int32_t *datap = (int32_t *)comp->data; |
|
y = tile->comp[compno].coord[1][0] - s->image_offset_y; |
|
line = picture->data[0] + y * picture->linesize[0]; |
|
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->ncomponents + compno; |
|
|
|
for (; x < tile->comp[compno].coord[0][1] - s->image_offset_x; x += s->cdx[compno]) { |
|
*datap += 1 << (s->cbps[compno] - 1); |
|
if (*datap < 0) |
|
*datap = 0; |
|
else if (*datap >= (1 << s->cbps[compno])) |
|
*datap = (1 << s->cbps[compno]) - 1; |
|
*dst = *datap++; |
|
dst += s->ncomponents; |
|
} |
|
line += picture->linesize[0]; |
|
} |
|
} |
|
} else { |
|
for (compno = 0; compno < s->ncomponents; compno++) { |
|
Jpeg2000Component *comp = tile->comp + compno; |
|
float *datap = comp->data; |
|
int32_t *i_datap = (int32_t *) comp->data; |
|
uint16_t *linel; |
|
|
|
y = tile->comp[compno].coord[1][0] - s->image_offset_y; |
|
linel = (uint16_t *)picture->data[0] + y * (picture->linesize[0] >> 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->ncomponents + compno); |
|
for (; x < s->avctx->width; x += s->cdx[compno]) { |
|
int16_t val; |
|
/* DC level shift and clip see ISO 15444-1:2002 G.1.2 */ |
|
if (s->avctx->flags & CODEC_FLAG_BITEXACT) |
|
val = *i_datap + (1 << (s->cbps[compno] - 1)); |
|
else |
|
val = lrintf(*datap) + (1 << (s->cbps[compno] - 1)); |
|
val = av_clip(val, 0, (1 << s->cbps[compno]) - 1); |
|
/* align 12 bit values in little-endian mode */ |
|
*dst = val << 4; |
|
datap++; |
|
i_datap++; |
|
dst += s->ncomponents; |
|
} |
|
linel += picture->linesize[0] >> 1; |
|
} |
|
} |
|
} |
|
return 0; |
|
} |
|
|
|
static void jpeg2000_dec_cleanup(Jpeg2000DecoderContext *s) |
|
{ |
|
int tileno, compno; |
|
for (tileno = 0; tileno < s->numXtiles * s->numYtiles; tileno++) { |
|
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); |
|
} |
|
|
|
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; |
|
const uint8_t *oldbuf; |
|
|
|
if (s->buf_end - s->buf < 2) { |
|
av_log(s->avctx, AV_LOG_ERROR, "Missing EOC\n"); |
|
break; |
|
} |
|
|
|
marker = bytestream_get_be16(&s->buf); |
|
oldbuf = s->buf; |
|
|
|
if (marker == JPEG2000_EOC) |
|
break; |
|
|
|
if (s->buf_end - s->buf < 2) |
|
return AVERROR(EINVAL); |
|
len = bytestream_get_be16(&s->buf); |
|
switch (marker) { |
|
case JPEG2000_SIZ: |
|
ret = get_siz(s); |
|
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: |
|
ret = get_sot(s, len); |
|
break; |
|
case JPEG2000_COM: |
|
// the comment is ignored |
|
s->buf += 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%lX\n", |
|
marker, (uint64_t)(s->buf - s->buf_start - 4)); |
|
s->buf += len - 2; |
|
break; |
|
} |
|
if (((s->buf - oldbuf != len) && (marker != JPEG2000_SOT)) || 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; |
|
Jpeg2000Tile *tile = s->tile + s->curtileno; |
|
|
|
if (ret = init_tile(s, s->curtileno)) |
|
return ret; |
|
if (ret = jpeg2000_decode_packets(s, tile)) |
|
return ret; |
|
|
|
return 0; |
|
} |
|
|
|
static int jp2_find_codestream(Jpeg2000DecoderContext *s) |
|
{ |
|
int32_t atom_size; |
|
int found_codestream = 0, search_range = 10; |
|
|
|
// Skip JPEG 2000 signature atom. |
|
s->buf += 12; |
|
|
|
while (!found_codestream && search_range) { |
|
atom_size = AV_RB32(s->buf); |
|
if (AV_RB32(s->buf + 4) == JP2_CODESTREAM) { |
|
found_codestream = 1; |
|
s->buf += 8; |
|
} else { |
|
s->buf += atom_size; |
|
search_range--; |
|
} |
|
} |
|
|
|
if (found_codestream) |
|
return 1; |
|
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; |
|
s->buf = s->buf_start = avpkt->data; |
|
s->buf_end = s->buf_start + avpkt->size; |
|
s->curtileno = 0; // TODO: only one tile in DCI JP2K. to implement for more tiles |
|
|
|
// reduction factor, i.e number of resolution levels to skip |
|
s->reduction_factor = s->lowres; |
|
|
|
if (s->buf_end - s->buf < 2) |
|
return AVERROR(EINVAL); |
|
|
|
// check if the image is in jp2 format |
|
if ((AV_RB32(s->buf) == 12) && |
|
(AV_RB32(s->buf + 4) == JP2_SIG_TYPE) && |
|
(AV_RB32(s->buf + 8) == JP2_SIG_VALUE)) { |
|
if (!jp2_find_codestream(s)) { |
|
av_log(avctx, AV_LOG_ERROR, |
|
"couldn't find jpeg2k codestream atom\n"); |
|
return -1; |
|
} |
|
} |
|
|
|
if (bytestream_get_be16(&s->buf) != JPEG2000_SOC) { |
|
av_log(avctx, AV_LOG_ERROR, "SOC marker not present\n"); |
|
return -1; |
|
} |
|
if (ret = jpeg2000_read_main_headers(s)) |
|
goto end; |
|
|
|
/* get picture buffer */ |
|
if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0) { |
|
av_log(avctx, AV_LOG_ERROR, "ff_thread_get_buffer() failed.\n"); |
|
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; |
|
|
|
*got_frame = 1; |
|
|
|
end: |
|
jpeg2000_dec_cleanup(s); |
|
return ret ? ret : s->buf - s->buf_start; |
|
} |
|
|
|
static void jpeg2000_init_static_data(AVCodec *codec) |
|
{ |
|
ff_jpeg2000_init_tier1_luts(); |
|
} |
|
|
|
#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(lowres), 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 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 = &class, |
|
.pix_fmts = (enum PixelFormat[]) { AV_PIX_FMT_XYZ12, |
|
AV_PIX_FMT_GRAY8, |
|
-1 }, |
|
.profiles = NULL_IF_CONFIG_SMALL(profiles) |
|
};
|
|
|