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Diffstat (limited to 'ffmpeg/libavcodec/j2kdec.c')
-rw-r--r--ffmpeg/libavcodec/j2kdec.c1093
1 files changed, 0 insertions, 1093 deletions
diff --git a/ffmpeg/libavcodec/j2kdec.c b/ffmpeg/libavcodec/j2kdec.c
deleted file mode 100644
index 6dcaf73..0000000
--- a/ffmpeg/libavcodec/j2kdec.c
+++ /dev/null
@@ -1,1093 +0,0 @@
-/*
- * JPEG2000 image decoder
- * Copyright (c) 2007 Kamil Nowosad
- *
- * This file is part of FFmpeg.
- *
- * FFmpeg is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * FFmpeg is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with FFmpeg; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-/**
- * JPEG2000 image decoder
- * @file
- * @author Kamil Nowosad
- */
-
-// #define DEBUG
-
-#include "avcodec.h"
-#include "bytestream.h"
-#include "internal.h"
-#include "j2k.h"
-#include "libavutil/common.h"
-
-#define JP2_SIG_TYPE 0x6A502020
-#define JP2_SIG_VALUE 0x0D0A870A
-#define JP2_CODESTREAM 0x6A703263
-
-#define HAD_COC 0x01
-#define HAD_QCC 0x02
-
-typedef struct {
- J2kComponent *comp;
- uint8_t properties[4];
- J2kCodingStyle codsty[4];
- J2kQuantStyle qntsty[4];
-} J2kTile;
-
-typedef struct {
- AVCodecContext *avctx;
- AVFrame *picture;
- GetByteContext g;
-
- int width, height; ///< image width and height
- int image_offset_x, image_offset_y;
- int tile_offset_x, tile_offset_y;
- uint8_t cbps[4]; ///< bits per sample in particular components
- uint8_t sgnd[4]; ///< if a component is signed
- uint8_t properties[4];
- int cdx[4], cdy[4];
- int precision;
- int ncomponents;
- int tile_width, tile_height; ///< tile size
- int numXtiles, numYtiles;
- int maxtilelen;
-
- J2kCodingStyle codsty[4];
- J2kQuantStyle qntsty[4];
-
- int bit_index;
-
- int curtileno;
-
- J2kTile *tile;
-} J2kDecoderContext;
-
-static int get_bits(J2kDecoderContext *s, int n)
-{
- int res = 0;
-
- while (--n >= 0){
- res <<= 1;
- if (s->bit_index == 0) {
- s->bit_index = 7 + (bytestream2_get_byte(&s->g) != 0xFFu);
- }
- s->bit_index--;
- res |= (bytestream2_peek_byte(&s->g) >> s->bit_index) & 1;
- }
- return res;
-}
-
-static void j2k_flush(J2kDecoderContext *s)
-{
- if (bytestream2_get_byte(&s->g) == 0xff)
- bytestream2_skip(&s->g, 1);
- s->bit_index = 8;
-}
-#if 0
-void printcomp(J2kComponent *comp)
-{
- int i;
- for (i = 0; i < comp->y1 - comp->y0; i++)
- ff_j2k_printv(comp->data + i * (comp->x1 - comp->x0), comp->x1 - comp->x0);
-}
-
-static void nspaces(FILE *fd, int n)
-{
- while(n--) putc(' ', fd);
-}
-
-static void dump(J2kDecoderContext *s, FILE *fd)
-{
- int tileno, compno, reslevelno, bandno, precno;
- fprintf(fd, "XSiz = %d, YSiz = %d, tile_width = %d, tile_height = %d\n"
- "numXtiles = %d, numYtiles = %d, ncomponents = %d\n"
- "tiles:\n",
- s->width, s->height, s->tile_width, s->tile_height,
- s->numXtiles, s->numYtiles, s->ncomponents);
- for (tileno = 0; tileno < s->numXtiles * s->numYtiles; tileno++){
- J2kTile *tile = s->tile + tileno;
- nspaces(fd, 2);
- fprintf(fd, "tile %d:\n", tileno);
- for(compno = 0; compno < s->ncomponents; compno++){
- J2kComponent *comp = tile->comp + compno;
- nspaces(fd, 4);
- fprintf(fd, "component %d:\n", compno);
- nspaces(fd, 4);
- fprintf(fd, "x0 = %d, x1 = %d, y0 = %d, y1 = %d\n",
- comp->x0, comp->x1, comp->y0, comp->y1);
- for(reslevelno = 0; reslevelno < codsty->nreslevels; reslevelno++){
- J2kResLevel *reslevel = comp->reslevel + reslevelno;
- nspaces(fd, 6);
- fprintf(fd, "reslevel %d:\n", reslevelno);
- nspaces(fd, 6);
- fprintf(fd, "x0 = %d, x1 = %d, y0 = %d, y1 = %d, nbands = %d\n",
- reslevel->x0, reslevel->x1, reslevel->y0,
- reslevel->y1, reslevel->nbands);
- for(bandno = 0; bandno < reslevel->nbands; bandno++){
- J2kBand *band = reslevel->band + bandno;
- nspaces(fd, 8);
- fprintf(fd, "band %d:\n", bandno);
- nspaces(fd, 8);
- fprintf(fd, "x0 = %d, x1 = %d, y0 = %d, y1 = %d,"
- "codeblock_width = %d, codeblock_height = %d cblknx = %d cblkny = %d\n",
- band->x0, band->x1,
- band->y0, band->y1,
- band->codeblock_width, band->codeblock_height,
- band->cblknx, band->cblkny);
- for (precno = 0; precno < reslevel->num_precincts_x * reslevel->num_precincts_y; precno++){
- J2kPrec *prec = band->prec + precno;
- nspaces(fd, 10);
- fprintf(fd, "prec %d:\n", precno);
- nspaces(fd, 10);
- fprintf(fd, "xi0 = %d, xi1 = %d, yi0 = %d, yi1 = %d\n",
- prec->xi0, prec->xi1, prec->yi0, prec->yi1);
- }
- }
- }
- }
- }
-}
-#endif
-
-/** decode the value stored in node */
-static int tag_tree_decode(J2kDecoderContext *s, J2kTgtNode *node, int threshold)
-{
- J2kTgtNode *stack[30];
- int sp = -1, curval = 0;
-
- if(!node)
- return AVERROR(EINVAL);
-
- while(node && !node->vis){
- stack[++sp] = node;
- node = node->parent;
- }
-
- if (node)
- curval = node->val;
- else
- curval = stack[sp]->val;
-
- while(curval < threshold && sp >= 0){
- if (curval < stack[sp]->val)
- curval = stack[sp]->val;
- while (curval < threshold){
- int ret;
- if ((ret = get_bits(s, 1)) > 0){
- stack[sp]->vis++;
- break;
- } else if (!ret)
- curval++;
- else
- return ret;
- }
- stack[sp]->val = curval;
- sp--;
- }
- return curval;
-}
-
-/* marker segments */
-/** get sizes and offsets of image, tiles; number of components */
-static int get_siz(J2kDecoderContext *s)
-{
- int i, ret;
-
- if (bytestream2_get_bytes_left(&s->g) < 36)
- return AVERROR(EINVAL);
-
- bytestream2_get_be16u(&s->g); // Rsiz (skipped)
- s->width = bytestream2_get_be32u(&s->g); // width
- s->height = bytestream2_get_be32u(&s->g); // height
- s->image_offset_x = bytestream2_get_be32u(&s->g); // X0Siz
- s->image_offset_y = bytestream2_get_be32u(&s->g); // Y0Siz
-
- s->tile_width = bytestream2_get_be32u(&s->g); // XTSiz
- s->tile_height = bytestream2_get_be32u(&s->g); // YTSiz
- s->tile_offset_x = bytestream2_get_be32u(&s->g); // XT0Siz
- s->tile_offset_y = bytestream2_get_be32u(&s->g); // YT0Siz
- s->ncomponents = bytestream2_get_be16u(&s->g); // CSiz
-
- if(s->ncomponents <= 0 || s->ncomponents > 4) {
- av_log(s->avctx, AV_LOG_ERROR, "unsupported/invalid ncomponents: %d\n", s->ncomponents);
- return AVERROR(EINVAL);
- }
- if(s->tile_width<=0 || s->tile_height<=0)
- return AVERROR(EINVAL);
-
- if (bytestream2_get_bytes_left(&s->g) < 3 * s->ncomponents)
- return AVERROR(EINVAL);
-
- for (i = 0; i < s->ncomponents; i++){ // Ssiz_i XRsiz_i, YRsiz_i
- uint8_t x = bytestream2_get_byteu(&s->g);
- s->cbps[i] = (x & 0x7f) + 1;
- s->precision = FFMAX(s->cbps[i], s->precision);
- s->sgnd[i] = !!(x & 0x80);
- s->cdx[i] = bytestream2_get_byteu(&s->g);
- s->cdy[i] = bytestream2_get_byteu(&s->g);
- }
-
- s->numXtiles = ff_j2k_ceildiv(s->width - s->tile_offset_x, s->tile_width);
- s->numYtiles = ff_j2k_ceildiv(s->height - s->tile_offset_y, s->tile_height);
-
- if(s->numXtiles * (uint64_t)s->numYtiles > INT_MAX/sizeof(J2kTile))
- return AVERROR(EINVAL);
-
- s->tile = av_mallocz(s->numXtiles * s->numYtiles * sizeof(J2kTile));
- if (!s->tile)
- return AVERROR(ENOMEM);
-
- for (i = 0; i < s->numXtiles * s->numYtiles; i++){
- J2kTile *tile = s->tile + i;
-
- tile->comp = av_mallocz(s->ncomponents * sizeof(J2kComponent));
- if (!tile->comp)
- return AVERROR(ENOMEM);
- }
-
- s->avctx->width = s->width - s->image_offset_x;
- s->avctx->height = s->height - s->image_offset_y;
-
- switch(s->ncomponents){
- case 1:
- if (s->precision > 8) {
- s->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
- } else {
- s->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
- }
- break;
- case 3:
- if (s->precision > 8) {
- s->avctx->pix_fmt = AV_PIX_FMT_RGB48;
- } else {
- s->avctx->pix_fmt = AV_PIX_FMT_RGB24;
- }
- break;
- case 4:
- s->avctx->pix_fmt = AV_PIX_FMT_RGBA;
- break;
- }
-
-
- if ((ret = ff_get_buffer(s->avctx, s->picture, 0)) < 0)
- return ret;
-
- s->picture->pict_type = AV_PICTURE_TYPE_I;
- s->picture->key_frame = 1;
-
- return 0;
-}
-
-/** get common part for COD and COC segments */
-static int get_cox(J2kDecoderContext *s, J2kCodingStyle *c)
-{
- if (bytestream2_get_bytes_left(&s->g) < 5)
- return AVERROR(EINVAL);
- c->nreslevels = bytestream2_get_byteu(&s->g) + 1; // num of resolution levels - 1
- c->log2_cblk_width = bytestream2_get_byteu(&s->g) + 2; // cblk width
- c->log2_cblk_height = bytestream2_get_byteu(&s->g) + 2; // cblk height
-
- c->cblk_style = bytestream2_get_byteu(&s->g);
- if (c->cblk_style != 0){ // cblk style
- av_log(s->avctx, AV_LOG_WARNING, "extra cblk styles %X\n", c->cblk_style);
- }
- c->transform = bytestream2_get_byteu(&s->g); // transformation
- if (c->csty & J2K_CSTY_PREC) {
- int i;
-
- for (i = 0; i < c->nreslevels; i++)
- bytestream2_get_byte(&s->g);
- }
- return 0;
-}
-
-/** get coding parameters for a particular tile or whole image*/
-static int get_cod(J2kDecoderContext *s, J2kCodingStyle *c, uint8_t *properties)
-{
- J2kCodingStyle tmp;
- int compno;
-
- if (bytestream2_get_bytes_left(&s->g) < 5)
- return AVERROR(EINVAL);
-
- tmp.log2_prec_width =
- tmp.log2_prec_height = 15;
-
- tmp.csty = bytestream2_get_byteu(&s->g);
-
- if (bytestream2_get_byteu(&s->g)){ // progression level
- av_log(s->avctx, AV_LOG_ERROR, "only LRCP progression supported\n");
- return -1;
- }
-
- tmp.nlayers = bytestream2_get_be16u(&s->g);
- tmp.mct = bytestream2_get_byteu(&s->g); // multiple component transformation
-
- get_cox(s, &tmp);
- for (compno = 0; compno < s->ncomponents; compno++){
- if (!(properties[compno] & HAD_COC))
- memcpy(c + compno, &tmp, sizeof(J2kCodingStyle));
- }
- return 0;
-}
-
-/** get coding parameters for a component in the whole image on a particular tile */
-static int get_coc(J2kDecoderContext *s, J2kCodingStyle *c, uint8_t *properties)
-{
- int compno;
-
- if (bytestream2_get_bytes_left(&s->g) < 2)
- return AVERROR(EINVAL);
-
- compno = bytestream2_get_byteu(&s->g);
-
- c += compno;
- c->csty = bytestream2_get_byte(&s->g);
- get_cox(s, c);
-
- properties[compno] |= HAD_COC;
- return 0;
-}
-
-/** get common part for QCD and QCC segments */
-static int get_qcx(J2kDecoderContext *s, int n, J2kQuantStyle *q)
-{
- int i, x;
-
- if (bytestream2_get_bytes_left(&s->g) < 1)
- return AVERROR(EINVAL);
-
- x = bytestream2_get_byteu(&s->g); // Sqcd
-
- q->nguardbits = x >> 5;
- q->quantsty = x & 0x1f;
-
- if (q->quantsty == J2K_QSTY_NONE){
- n -= 3;
- if (bytestream2_get_bytes_left(&s->g) < n || 32*3 < n)
- return AVERROR(EINVAL);
- for (i = 0; i < n; i++)
- q->expn[i] = bytestream2_get_byteu(&s->g) >> 3;
- } else if (q->quantsty == J2K_QSTY_SI){
- if (bytestream2_get_bytes_left(&s->g) < 2)
- return AVERROR(EINVAL);
- x = bytestream2_get_be16u(&s->g);
- q->expn[0] = x >> 11;
- q->mant[0] = x & 0x7ff;
- for (i = 1; i < 32 * 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 || 32*3 < n)
- return AVERROR(EINVAL);
- 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(J2kDecoderContext *s, int n, J2kQuantStyle *q, uint8_t *properties)
-{
- J2kQuantStyle tmp;
- int compno;
-
- if (get_qcx(s, n, &tmp))
- return -1;
- for (compno = 0; compno < s->ncomponents; compno++)
- if (!(properties[compno] & HAD_QCC))
- memcpy(q + compno, &tmp, sizeof(J2kQuantStyle));
- return 0;
-}
-
-/** get quantization parameters for a component in the whole image on in a particular tile */
-static int get_qcc(J2kDecoderContext *s, int n, J2kQuantStyle *q, uint8_t *properties)
-{
- int compno;
-
- if (bytestream2_get_bytes_left(&s->g) < 1)
- return AVERROR(EINVAL);
-
- compno = bytestream2_get_byteu(&s->g);
- properties[compno] |= HAD_QCC;
- return get_qcx(s, n-1, q+compno);
-}
-
-/** get start of tile segment */
-static uint8_t get_sot(J2kDecoderContext *s)
-{
- if (bytestream2_get_bytes_left(&s->g) < 8)
- return AVERROR(EINVAL);
-
- s->curtileno = bytestream2_get_be16u(&s->g); ///< Isot
- if((unsigned)s->curtileno >= s->numXtiles * s->numYtiles){
- s->curtileno=0;
- return AVERROR(EINVAL);
- }
-
- bytestream2_skipu(&s->g, 4); ///< Psot (ignored)
-
- if (!bytestream2_get_byteu(&s->g)){ ///< TPsot
- J2kTile *tile = s->tile + s->curtileno;
-
- /* copy defaults */
- memcpy(tile->codsty, s->codsty, s->ncomponents * sizeof(J2kCodingStyle));
- memcpy(tile->qntsty, s->qntsty, s->ncomponents * sizeof(J2kQuantStyle));
- }
- bytestream2_get_byteu(&s->g); ///< TNsot
-
- return 0;
-}
-
-static int init_tile(J2kDecoderContext *s, int tileno)
-{
- int compno,
- tilex = tileno % s->numXtiles,
- tiley = tileno / s->numXtiles;
- J2kTile *tile = s->tile + tileno;
-
- if (!tile->comp)
- return AVERROR(ENOMEM);
- for (compno = 0; compno < s->ncomponents; compno++){
- J2kComponent *comp = tile->comp + compno;
- J2kCodingStyle *codsty = tile->codsty + compno;
- J2kQuantStyle *qntsty = tile->qntsty + compno;
- int ret; // global bandno
-
- comp->coord[0][0] = FFMAX(tilex * s->tile_width + s->tile_offset_x, s->image_offset_x);
- comp->coord[0][1] = FFMIN((tilex+1)*s->tile_width + s->tile_offset_x, s->width);
- comp->coord[1][0] = FFMAX(tiley * s->tile_height + s->tile_offset_y, s->image_offset_y);
- comp->coord[1][1] = FFMIN((tiley+1)*s->tile_height + s->tile_offset_y, s->height);
-
- if (ret = ff_j2k_init_component(comp, codsty, qntsty, s->cbps[compno], s->cdx[compno], s->cdy[compno]))
- return ret;
- }
- return 0;
-}
-
-/** read the number of coding passes */
-static int getnpasses(J2kDecoderContext *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(J2kDecoderContext *s)
-{
- int res = 0, ret;
- while (ret = get_bits(s, 1)){
- if (ret < 0)
- return ret;
- res++;
- }
- return res;
-}
-
-static int decode_packet(J2kDecoderContext *s, J2kCodingStyle *codsty, J2kResLevel *rlevel, int precno,
- int layno, uint8_t *expn, int numgbits)
-{
- int bandno, cblkny, cblknx, cblkno, ret;
-
- if (!(ret = get_bits(s, 1))){
- j2k_flush(s);
- return 0;
- } else if (ret < 0)
- return ret;
-
- for (bandno = 0; bandno < rlevel->nbands; bandno++){
- J2kBand *band = rlevel->band + bandno;
- J2kPrec *prec = band->prec + precno;
- int pos = 0;
-
- if (band->coord[0][0] == band->coord[0][1]
- || band->coord[1][0] == band->coord[1][1])
- continue;
-
- for (cblkny = prec->yi0; cblkny < prec->yi1; cblkny++)
- for(cblknx = prec->xi0, cblkno = cblkny * band->cblknx + cblknx; cblknx < prec->xi1; cblknx++, cblkno++, pos++){
- J2kCblk *cblk = band->cblk + cblkno;
- int incl, newpasses, llen;
-
- if (cblk->npasses)
- incl = get_bits(s, 1);
- else
- incl = tag_tree_decode(s, prec->cblkincl + pos, 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 + pos, 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;
- }
- }
- j2k_flush(s);
-
- if (codsty->csty & J2K_CSTY_EPH) {
- if (bytestream2_peek_be16(&s->g) == J2K_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++){
- J2kBand *band = rlevel->band + bandno;
- int yi, cblknw = band->prec[precno].xi1 - band->prec[precno].xi0;
- for (yi = band->prec[precno].yi0; yi < band->prec[precno].yi1; yi++){
- int xi;
- for (xi = band->prec[precno].xi0; xi < band->prec[precno].xi1; xi++){
- J2kCblk *cblk = band->cblk + yi * cblknw + xi;
- if (bytestream2_get_bytes_left(&s->g) < cblk->lengthinc)
- return AVERROR(EINVAL);
- bytestream2_get_bufferu(&s->g, cblk->data, cblk->lengthinc);
- cblk->length += cblk->lengthinc;
- cblk->lengthinc = 0;
- }
- }
- }
- return 0;
-}
-
-static int decode_packets(J2kDecoderContext *s, J2kTile *tile)
-{
- int layno, reslevelno, compno, precno, ok_reslevel;
- s->bit_index = 8;
- 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++){
- J2kCodingStyle *codsty = tile->codsty + compno;
- J2kQuantStyle *qntsty = tile->qntsty + compno;
- if (reslevelno < codsty->nreslevels){
- J2kResLevel *rlevel = tile->comp[compno].reslevel + reslevelno;
- ok_reslevel = 1;
- for (precno = 0; precno < rlevel->num_precincts_x * rlevel->num_precincts_y; precno++){
- if (decode_packet(s, codsty, rlevel, precno, layno, qntsty->expn +
- (reslevelno ? 3*(reslevelno-1)+1 : 0), qntsty->nguardbits))
- return -1;
- }
- }
- }
- }
- }
- return 0;
-}
-
-/* TIER-1 routines */
-static void decode_sigpass(J2kT1Context *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] & J2K_T1_SIG_NB)
- && !(t1->flags[y+1][x+1] & (J2K_T1_SIG | J2K_T1_VIS))){
- int vert_causal_ctx_csty_loc_symbol = vert_causal_ctx_csty_symbol && (x == 3 && y == 3);
- if (ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + ff_j2k_getnbctxno(t1->flags[y+1][x+1], bandno,
- vert_causal_ctx_csty_loc_symbol))){
- int xorbit, ctxno = ff_j2k_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_j2k_set_significant(t1, x, y, t1->data[y][x] < 0);
- }
- t1->flags[y+1][x+1] |= J2K_T1_VIS;
- }
- }
-}
-
-static void decode_refpass(J2kT1Context *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] & (J2K_T1_SIG | J2K_T1_VIS)) == J2K_T1_SIG){
- int ctxno = ff_j2k_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] |= J2K_T1_REF;
- }
- }
-}
-
-static void decode_clnpass(J2kDecoderContext *s, J2kT1Context *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] & (J2K_T1_SIG_NB | J2K_T1_VIS | J2K_T1_SIG)) ||
- (t1->flags[y0+2][x+1] & (J2K_T1_SIG_NB | J2K_T1_VIS | J2K_T1_SIG)) ||
- (t1->flags[y0+3][x+1] & (J2K_T1_SIG_NB | J2K_T1_VIS | J2K_T1_SIG)) ||
- (t1->flags[y0+4][x+1] & (J2K_T1_SIG_NB | J2K_T1_VIS | J2K_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] & (J2K_T1_SIG | J2K_T1_VIS)))
- dec = ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + ff_j2k_getnbctxno(t1->flags[y+1][x+1],
- bandno, 0));
- }
- if (dec){
- int xorbit, ctxno = ff_j2k_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_j2k_set_significant(t1, x, y, t1->data[y][x] < 0);
- }
- dec = 0;
- t1->flags[y+1][x+1] &= ~J2K_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(J2kDecoderContext *s, J2kCodingStyle *codsty, J2kT1Context *t1, J2kCblk *cblk,
- int width, int height, int bandpos)
-{
- int passno = cblk->npasses, pass_t = 2, bpno = cblk->nonzerobits - 1, y, clnpass_cnt = 0;
- int bpass_csty_symbol = J2K_CBLK_BYPASS & codsty->cblk_style;
- int vert_causal_ctx_csty_symbol = J2K_CBLK_VSC & codsty->cblk_style;
-
- for (y = 0; y < height+2; y++)
- memset(t1->flags[y], 0, (width+2)*sizeof(int));
-
- for (y = 0; y < height; y++)
- memset(t1->data[y], 0, width*sizeof(int));
-
- 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 & J2K_CBLK_SEGSYM);
- 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;
-}
-
-static void mct_decode(J2kDecoderContext *s, J2kTile *tile)
-{
- int i, *src[3], i0, i1, i2, csize = 1;
-
- for (i = 0; i < 3; i++)
- src[i] = tile->comp[i].data;
-
- for (i = 0; i < 2; i++)
- csize *= tile->comp[0].coord[i][1] - tile->comp[0].coord[i][0];
-
- if (tile->codsty[0].transform == FF_DWT97){
- for (i = 0; i < csize; i++){
- i0 = *src[0] + (*src[2] * 46802 >> 16);
- i1 = *src[0] - (*src[1] * 22553 + *src[2] * 46802 >> 16);
- i2 = *src[0] + (116130 * *src[1] >> 16);
- *src[0]++ = i0;
- *src[1]++ = i1;
- *src[2]++ = i2;
- }
- } else{
- 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;
- }
- }
-}
-
-static int decode_tile(J2kDecoderContext *s, J2kTile *tile)
-{
- int compno, reslevelno, bandno;
- int x, y, *src[4];
- uint8_t *line;
- J2kT1Context t1;
-
- for (compno = 0; compno < s->ncomponents; compno++){
- J2kComponent *comp = tile->comp + compno;
- J2kCodingStyle *codsty = tile->codsty + compno;
-
- for (reslevelno = 0; reslevelno < codsty->nreslevels; reslevelno++){
- J2kResLevel *rlevel = comp->reslevel + reslevelno;
- for (bandno = 0; bandno < rlevel->nbands; bandno++){
- J2kBand *band = rlevel->band + bandno;
- int cblkx, cblky, cblkno=0, xx0, x0, xx1, y0, yy0, yy1, bandpos;
-
- bandpos = bandno + (reslevelno > 0);
-
- yy0 = bandno == 0 ? 0 : comp->reslevel[reslevelno-1].coord[1][1] - comp->reslevel[reslevelno-1].coord[1][0];
- y0 = yy0;
- yy1 = FFMIN(ff_j2k_ceildiv(band->coord[1][0] + 1, band->codeblock_height) * band->codeblock_height,
- band->coord[1][1]) - band->coord[1][0] + yy0;
-
- if (band->coord[0][0] == band->coord[0][1] || band->coord[1][0] == band->coord[1][1])
- continue;
-
- for (cblky = 0; cblky < band->cblkny; cblky++){
- if (reslevelno == 0 || bandno == 1)
- xx0 = 0;
- else
- xx0 = comp->reslevel[reslevelno-1].coord[0][1] - comp->reslevel[reslevelno-1].coord[0][0];
- x0 = xx0;
- xx1 = FFMIN(ff_j2k_ceildiv(band->coord[0][0] + 1, band->codeblock_width) * band->codeblock_width,
- band->coord[0][1]) - band->coord[0][0] + xx0;
-
- for (cblkx = 0; cblkx < band->cblknx; cblkx++, cblkno++){
- int y, x;
- decode_cblk(s, codsty, &t1, band->cblk + cblkno, xx1 - xx0, yy1 - yy0, bandpos);
- if (codsty->transform == FF_DWT53){
- for (y = yy0; y < yy1; y+=s->cdy[compno]){
- int *ptr = t1.data[y-yy0];
- for (x = xx0; x < xx1; x+=s->cdx[compno]){
- comp->data[(comp->coord[0][1] - comp->coord[0][0]) * y + x] = *ptr++ >> 1;
- }
- }
- } else{
- for (y = yy0; y < yy1; y+=s->cdy[compno]){
- int *ptr = t1.data[y-yy0];
- for (x = xx0; x < xx1; x+=s->cdx[compno]){
- int tmp = ((int64_t)*ptr++) * ((int64_t)band->stepsize) >> 13, tmp2;
- tmp2 = FFABS(tmp>>1) + (tmp&1);
- comp->data[(comp->coord[0][1] - comp->coord[0][0]) * y + x] = tmp < 0 ? -tmp2 : tmp2;
- }
- }
- }
- xx0 = xx1;
- xx1 = FFMIN(xx1 + band->codeblock_width, band->coord[0][1] - band->coord[0][0] + x0);
- }
- yy0 = yy1;
- yy1 = FFMIN(yy1 + band->codeblock_height, band->coord[1][1] - band->coord[1][0] + y0);
- }
- }
- }
- ff_j2k_dwt_decode(&comp->dwt, comp->data);
- src[compno] = comp->data;
- }
- if (tile->codsty[0].mct)
- mct_decode(s, tile);
-
- if (s->precision <= 8) {
- for (compno = 0; compno < s->ncomponents; compno++){
- y = tile->comp[compno].coord[1][0] - s->image_offset_y;
- line = s->picture->data[0] + y * s->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]) {
- *src[compno] += 1 << (s->cbps[compno]-1);
- if (*src[compno] < 0)
- *src[compno] = 0;
- else if (*src[compno] >= (1 << s->cbps[compno]))
- *src[compno] = (1 << s->cbps[compno]) - 1;
- *dst = *src[compno]++;
- dst += s->ncomponents;
- }
- line += s->picture->linesize[0];
- }
- }
- } else {
- for (compno = 0; compno < s->ncomponents; compno++) {
- y = tile->comp[compno].coord[1][0] - s->image_offset_y;
- line = s->picture->data[0] + y * s->picture->linesize[0];
- 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 = (uint16_t *)(line + (x * s->ncomponents + compno) * 2);
- for (; x < tile->comp[compno].coord[0][1] - s->image_offset_x; x += s-> cdx[compno]) {
- int32_t val;
-
- val = *src[compno]++ << (16 - s->cbps[compno]);
- val += 1 << 15;
- val = av_clip(val, 0, (1 << 16) - 1);
- *dst = val;
- dst += s->ncomponents;
- }
- line += s->picture->linesize[0];
- }
- }
- }
- return 0;
-}
-
-static void cleanup(J2kDecoderContext *s)
-{
- int tileno, compno;
- for (tileno = 0; tileno < s->numXtiles * s->numYtiles; tileno++){
- for (compno = 0; compno < s->ncomponents; compno++){
- J2kComponent *comp = s->tile[tileno].comp + compno;
- J2kCodingStyle *codsty = s->tile[tileno].codsty + compno;
-
- ff_j2k_cleanup(comp, codsty);
- }
- av_freep(&s->tile[tileno].comp);
- }
- av_freep(&s->tile);
-}
-
-static int decode_codestream(J2kDecoderContext *s)
-{
- J2kCodingStyle *codsty = s->codsty;
- J2kQuantStyle *qntsty = s->qntsty;
- uint8_t *properties = s->properties;
-
- for (;;){
- int oldpos, marker, len, ret = 0;
-
- 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);
- av_dlog(s->avctx, "marker 0x%.4X at pos 0x%x\n", marker, bytestream2_tell(&s->g) - 4);
- oldpos = bytestream2_tell(&s->g);
-
- if (marker == J2K_SOD){
- J2kTile *tile = s->tile + s->curtileno;
- if (ret = init_tile(s, s->curtileno)) {
- av_log(s->avctx, AV_LOG_ERROR, "tile initialization failed\n");
- return ret;
- }
- if (ret = decode_packets(s, tile)) {
- av_log(s->avctx, AV_LOG_ERROR, "packets decoding failed\n");
- return ret;
- }
- continue;
- }
- if (marker == J2K_EOC)
- break;
-
- if (bytestream2_get_bytes_left(&s->g) < 2)
- return AVERROR(EINVAL);
- len = bytestream2_get_be16u(&s->g);
- switch (marker){
- case J2K_SIZ:
- ret = get_siz(s);
- break;
- case J2K_COC:
- ret = get_coc(s, codsty, properties);
- break;
- case J2K_COD:
- ret = get_cod(s, codsty, properties);
- break;
- case J2K_QCC:
- ret = get_qcc(s, len, qntsty, properties);
- break;
- case J2K_QCD:
- ret = get_qcd(s, len, qntsty, properties);
- break;
- case J2K_SOT:
- if (!(ret = get_sot(s))){
- codsty = s->tile[s->curtileno].codsty;
- qntsty = s->tile[s->curtileno].qntsty;
- properties = s->tile[s->curtileno].properties;
- }
- break;
- case J2K_COM:
- // the comment is ignored
- bytestream2_skip(&s->g, len - 2);
- 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;
-}
-
-static int jp2_find_codestream(J2kDecoderContext *s)
-{
- uint32_t atom_size, atom;
- int found_codestream = 0, search_range = 10;
-
- while(!found_codestream && search_range && bytestream2_get_bytes_left(&s->g) >= 8) {
- atom_size = bytestream2_get_be32u(&s->g);
- atom = bytestream2_get_be32u(&s->g);
- if (atom == JP2_CODESTREAM) {
- found_codestream = 1;
- } else {
- if (bytestream2_get_bytes_left(&s->g) < atom_size - 8)
- return 0;
- bytestream2_skipu(&s->g, atom_size - 8);
- search_range--;
- }
- }
-
- if (found_codestream)
- return 1;
- return 0;
-}
-
-static int decode_frame(AVCodecContext *avctx,
- void *data, int *got_frame,
- AVPacket *avpkt)
-{
- J2kDecoderContext *s = avctx->priv_data;
- AVFrame *picture = data;
- int tileno, ret;
-
- s->picture = picture;
-
- bytestream2_init(&s->g, avpkt->data, avpkt->size);
- s->curtileno = -1;
-
- if (bytestream2_get_bytes_left(&s->g) < 2) {
- ret = AVERROR(EINVAL);
- goto err_out;
- }
-
- // 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, "couldn't find jpeg2k codestream atom\n");
- ret = -1;
- goto err_out;
- }
- } else {
- bytestream2_seek(&s->g, 0, SEEK_SET);
- }
-
- if (bytestream2_get_be16u(&s->g) != J2K_SOC){
- av_log(avctx, AV_LOG_ERROR, "SOC marker not present\n");
- ret = -1;
- goto err_out;
- }
- if (ret = decode_codestream(s))
- goto err_out;
-
- for (tileno = 0; tileno < s->numXtiles * s->numYtiles; tileno++)
- if (ret = decode_tile(s, s->tile + tileno))
- goto err_out;
-
- cleanup(s);
-
- *got_frame = 1;
-
- return bytestream2_tell(&s->g);
-
-err_out:
- cleanup(s);
- return ret;
-}
-
-static av_cold int j2kdec_init(AVCodecContext *avctx)
-{
- J2kDecoderContext *s = avctx->priv_data;
-
- s->avctx = avctx;
-
- ff_j2k_init_tier1_luts();
-
- return 0;
-}
-
-AVCodec ff_jpeg2000_decoder = {
- .name = "j2k",
- .type = AVMEDIA_TYPE_VIDEO,
- .id = AV_CODEC_ID_JPEG2000,
- .priv_data_size = sizeof(J2kDecoderContext),
- .init = j2kdec_init,
- .decode = decode_frame,
- .capabilities = CODEC_CAP_EXPERIMENTAL,
- .long_name = NULL_IF_CONFIG_SMALL("JPEG 2000"),
-};
generated by cgit v1.2.3 (git 2.39.1) at 2025-12-06 16:08:01 +0000