aboutsummaryrefslogtreecommitdiff
path: root/libavcodec/j2k.c
diff options
context:
space:
mode:
Diffstat (limited to 'libavcodec/j2k.c')
-rw-r--r--libavcodec/j2k.c391
1 files changed, 391 insertions, 0 deletions
diff --git a/libavcodec/j2k.c b/libavcodec/j2k.c
new file mode 100644
index 0000000000..5a42814c0f
--- /dev/null
+++ b/libavcodec/j2k.c
@@ -0,0 +1,391 @@
+/*
+ * JPEG2000 encoder and decoder common functions
+ * 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 encoder and decoder common functions
+ * @file
+ * @author Kamil Nowosad
+ */
+
+
+#include "avcodec.h"
+#include "j2k.h"
+
+#define SHL(a, n) ((n)>=0 ? (a) << (n) : (a) >> -(n))
+
+#if 0
+void ff_j2k_printv(int *tab, int l)
+{
+ int i;
+ for (i = 0; i < l; i++)
+ printf("%.3d ", tab[i]);
+ printf("\n");
+}
+
+void ff_j2k_printu(uint8_t *tab, int l)
+{
+ int i;
+ for (i = 0; i < l; i++)
+ printf("%.3hd ", tab[i]);
+ printf("\n");
+}
+#endif
+
+/* tag tree routines */
+
+/** allocate the memory for tag tree */
+
+static int tag_tree_size(int w, int h)
+{
+ int res = 0;
+ while (w > 1 || h > 1){
+ res += w * h;
+ w = (w+1) >> 1;
+ h = (h+1) >> 1;
+ }
+ return res + 1;
+}
+
+J2kTgtNode *ff_j2k_tag_tree_init(int w, int h)
+{
+ int pw = w, ph = h;
+ J2kTgtNode *res, *t, *t2;
+
+ t = res = av_mallocz(tag_tree_size(w, h)*sizeof(J2kTgtNode));
+
+ if (res == NULL)
+ return NULL;
+
+ while (w > 1 || h > 1){
+ int i, j;
+ pw = w;
+ ph = h;
+
+ w = (w+1) >> 1;
+ h = (h+1) >> 1;
+ t2 = t + pw*ph;
+
+ for (i = 0; i < ph; i++)
+ for (j = 0; j < pw; j++){
+ t[i*pw + j].parent = &t2[(i>>1)*w + (j>>1)];
+ }
+ t = t2;
+ }
+ t[0].parent = NULL;
+ return res;
+}
+
+static void tag_tree_zero(J2kTgtNode *t, int w, int h)
+{
+ int i, siz = tag_tree_size(w, h);
+
+ for (i = 0; i < siz; i++){
+ t[i].val = 0;
+ t[i].vis = 0;
+ }
+}
+
+uint8_t ff_j2k_nbctxno_lut[256][4];
+
+static int getnbctxno(int flag, int bandno, int vert_causal_ctx_csty_symbol)
+{
+ int h, v, d;
+
+ h = ((flag & J2K_T1_SIG_E) ? 1:0)+
+ ((flag & J2K_T1_SIG_W) ? 1:0);
+ v = ((flag & J2K_T1_SIG_N) ? 1:0);
+ if (!vert_causal_ctx_csty_symbol)
+ v = v + ((flag & J2K_T1_SIG_S) ? 1:0);
+ d = ((flag & J2K_T1_SIG_NE) ? 1:0)+
+ ((flag & J2K_T1_SIG_NW) ? 1:0);
+ if (!vert_causal_ctx_csty_symbol)
+ d = d + ((flag & J2K_T1_SIG_SE) ? 1:0)+
+ ((flag & J2K_T1_SIG_SW) ? 1:0);
+ if (bandno < 3){
+ if (bandno == 1)
+ FFSWAP(int, h, v);
+ if (h == 2) return 8;
+ if (h == 1){
+ if (v >= 1) return 7;
+ if (d >= 1) return 6;
+ return 5;
+ }
+ if (v == 2) return 4;
+ if (v == 1) return 3;
+ if (d >= 2) return 2;
+ if (d == 1) return 1;
+ return 0;
+ } else{
+ if (d >= 3) return 8;
+ if (d == 2){
+ if (h+v >= 1) return 7;
+ return 6;
+ }
+ if (d == 1){
+ if (h+v >= 2) return 5;
+ if (h+v == 1) return 4;
+ return 3;
+ }
+ if (h+v >= 2) return 2;
+ if (h+v == 1) return 1;
+ return 0;
+ }
+}
+
+uint8_t ff_j2k_sgnctxno_lut[16][16], ff_j2k_xorbit_lut[16][16];
+
+static int getsgnctxno(int flag, uint8_t *xorbit)
+{
+ int vcontrib, hcontrib;
+ static const int contribtab[3][3] = {{0, -1, 1}, {-1, -1, 0}, {1, 0, 1}};
+ static const int ctxlbltab[3][3] = {{13, 12, 11}, {10, 9, 10}, {11, 12, 13}};
+ static const int xorbittab[3][3] = {{1, 1, 1,}, {1, 0, 0}, {0, 0, 0}};
+
+ hcontrib = contribtab[flag & J2K_T1_SIG_E ? flag & J2K_T1_SGN_E ? 1:2:0]
+ [flag & J2K_T1_SIG_W ? flag & J2K_T1_SGN_W ? 1:2:0]+1;
+ vcontrib = contribtab[flag & J2K_T1_SIG_S ? flag & J2K_T1_SGN_S ? 1:2:0]
+ [flag & J2K_T1_SIG_N ? flag & J2K_T1_SGN_N ? 1:2:0]+1;
+ *xorbit = xorbittab[hcontrib][vcontrib];
+ return ctxlbltab[hcontrib][vcontrib];
+}
+
+void ff_j2k_init_tier1_luts(void)
+{
+ int i, j;
+ for (i = 0; i < 256; i++)
+ for (j = 0; j < 4; j++)
+ ff_j2k_nbctxno_lut[i][j] = getnbctxno(i, j, 0);
+ for (i = 0; i < 16; i++)
+ for (j = 0; j < 16; j++)
+ ff_j2k_sgnctxno_lut[i][j] = getsgnctxno(i + (j << 8), &ff_j2k_xorbit_lut[i][j]);
+}
+
+void ff_j2k_set_significant(J2kT1Context *t1, int x, int y, int negative)
+{
+ x++; y++;
+ t1->flags[y][x] |= J2K_T1_SIG;
+ if (negative){
+ t1->flags[y][x+1] |= J2K_T1_SIG_W | J2K_T1_SGN_W;
+ t1->flags[y][x-1] |= J2K_T1_SIG_E | J2K_T1_SGN_E;
+ t1->flags[y+1][x] |= J2K_T1_SIG_N | J2K_T1_SGN_N;
+ t1->flags[y-1][x] |= J2K_T1_SIG_S | J2K_T1_SGN_S;
+ } else{
+ t1->flags[y][x+1] |= J2K_T1_SIG_W;
+ t1->flags[y][x-1] |= J2K_T1_SIG_E;
+ t1->flags[y+1][x] |= J2K_T1_SIG_N;
+ t1->flags[y-1][x] |= J2K_T1_SIG_S;
+ }
+ t1->flags[y+1][x+1] |= J2K_T1_SIG_NW;
+ t1->flags[y+1][x-1] |= J2K_T1_SIG_NE;
+ t1->flags[y-1][x+1] |= J2K_T1_SIG_SW;
+ t1->flags[y-1][x-1] |= J2K_T1_SIG_SE;
+}
+
+int ff_j2k_init_component(J2kComponent *comp, J2kCodingStyle *codsty, J2kQuantStyle *qntsty, int cbps, int dx, int dy)
+{
+ int reslevelno, bandno, gbandno = 0, ret, i, j, csize = 1;
+
+ if (ret=ff_j2k_dwt_init(&comp->dwt, comp->coord, codsty->nreslevels-1, codsty->transform))
+ return ret;
+ for (i = 0; i < 2; i++)
+ csize *= comp->coord[i][1] - comp->coord[i][0];
+
+ comp->data = av_malloc(csize * sizeof(int));
+ if (!comp->data)
+ return AVERROR(ENOMEM);
+ comp->reslevel = av_malloc(codsty->nreslevels * sizeof(J2kResLevel));
+
+ if (!comp->reslevel)
+ return AVERROR(ENOMEM);
+ for (reslevelno = 0; reslevelno < codsty->nreslevels; reslevelno++){
+ int declvl = codsty->nreslevels - reslevelno;
+ J2kResLevel *reslevel = comp->reslevel + reslevelno;
+
+ for (i = 0; i < 2; i++)
+ for (j = 0; j < 2; j++)
+ reslevel->coord[i][j] =
+ ff_j2k_ceildivpow2(comp->coord[i][j], declvl - 1);
+
+ if (reslevelno == 0)
+ reslevel->nbands = 1;
+ else
+ reslevel->nbands = 3;
+
+ if (reslevel->coord[0][1] == reslevel->coord[0][0])
+ reslevel->num_precincts_x = 0;
+ else
+ reslevel->num_precincts_x = ff_j2k_ceildivpow2(reslevel->coord[0][1], codsty->log2_prec_width)
+ - (reslevel->coord[0][0] >> codsty->log2_prec_width);
+
+ if (reslevel->coord[1][1] == reslevel->coord[1][0])
+ reslevel->num_precincts_y = 0;
+ else
+ reslevel->num_precincts_y = ff_j2k_ceildivpow2(reslevel->coord[1][1], codsty->log2_prec_height)
+ - (reslevel->coord[1][0] >> codsty->log2_prec_height);
+
+ reslevel->band = av_malloc(reslevel->nbands * sizeof(J2kBand));
+ if (!reslevel->band)
+ return AVERROR(ENOMEM);
+ for (bandno = 0; bandno < reslevel->nbands; bandno++, gbandno++){
+ J2kBand *band = reslevel->band + bandno;
+ int cblkno, precx, precy, precno;
+ int x0, y0, x1, y1;
+ int xi0, yi0, xi1, yi1;
+ int cblkperprecw, cblkperprech;
+
+ if (qntsty->quantsty != J2K_QSTY_NONE){
+ const static uint8_t lut_gain[2][4] = {{0, 0, 0, 0}, {0, 1, 1, 2}};
+ int numbps;
+
+ numbps = cbps + lut_gain[codsty->transform][bandno + reslevelno>0];
+ band->stepsize = SHL(2048 + qntsty->mant[gbandno], 2 + numbps - qntsty->expn[gbandno]);
+ } else
+ band->stepsize = 1 << 13;
+
+ if (reslevelno == 0){ // the same everywhere
+ band->codeblock_width = 1 << FFMIN(codsty->log2_cblk_width, codsty->log2_prec_width-1);
+ band->codeblock_height = 1 << FFMIN(codsty->log2_cblk_height, codsty->log2_prec_height-1);
+ for (i = 0; i < 2; i++)
+ for (j = 0; j < 2; j++)
+ band->coord[i][j] = ff_j2k_ceildivpow2(comp->coord[i][j], declvl-1);
+ } else{
+ band->codeblock_width = 1 << FFMIN(codsty->log2_cblk_width, codsty->log2_prec_width);
+ band->codeblock_height = 1 << FFMIN(codsty->log2_cblk_height, codsty->log2_prec_height);
+
+ for (i = 0; i < 2; i++)
+ for (j = 0; j < 2; j++)
+ band->coord[i][j] = ff_j2k_ceildivpow2(comp->coord[i][j] - (((bandno+1>>i)&1) << declvl-1), declvl);
+ }
+ band->cblknx = ff_j2k_ceildiv(band->coord[0][1], band->codeblock_width) - band->coord[0][0] / band->codeblock_width;
+ band->cblkny = ff_j2k_ceildiv(band->coord[1][1], band->codeblock_height) - band->coord[1][0] / band->codeblock_height;
+
+ for (j = 0; j < 2; j++)
+ band->coord[0][j] = ff_j2k_ceildiv(band->coord[0][j], dx);
+ for (j = 0; j < 2; j++)
+ band->coord[1][j] = ff_j2k_ceildiv(band->coord[1][j], dy);
+
+ band->cblknx = ff_j2k_ceildiv(band->cblknx, dx);
+ band->cblkny = ff_j2k_ceildiv(band->cblkny, dy);
+
+ band->cblk = av_malloc(band->cblknx * band->cblkny * sizeof(J2kCblk));
+ if (!band->cblk)
+ return AVERROR(ENOMEM);
+ band->prec = av_malloc(reslevel->num_precincts_x * reslevel->num_precincts_y * sizeof(J2kPrec));
+ if (!band->prec)
+ return AVERROR(ENOMEM);
+
+ for (cblkno = 0; cblkno < band->cblknx * band->cblkny; cblkno++){
+ J2kCblk *cblk = band->cblk + cblkno;
+ cblk->zero = 0;
+ cblk->lblock = 3;
+ cblk->length = 0;
+ cblk->lengthinc = 0;
+ cblk->npasses = 0;
+ }
+
+ y0 = band->coord[1][0];
+ y1 = ((band->coord[1][0] + (1<<codsty->log2_prec_height)) & ~((1<<codsty->log2_prec_height)-1)) - y0;
+ yi0 = 0;
+ yi1 = ff_j2k_ceildivpow2(y1 - y0, codsty->log2_cblk_height) << codsty->log2_cblk_height;
+ yi1 = FFMIN(yi1, band->cblkny);
+ cblkperprech = 1<<(codsty->log2_prec_height - codsty->log2_cblk_height);
+ for (precy = 0, precno = 0; precy < reslevel->num_precincts_y; precy++){
+ for (precx = 0; precx < reslevel->num_precincts_x; precx++, precno++){
+ band->prec[precno].yi0 = yi0;
+ band->prec[precno].yi1 = yi1;
+ }
+ yi1 += cblkperprech;
+ yi0 = yi1 - cblkperprech;
+ yi1 = FFMIN(yi1, band->cblkny);
+ }
+ x0 = band->coord[0][0];
+ x1 = ((band->coord[0][0] + (1<<codsty->log2_prec_width)) & ~((1<<codsty->log2_prec_width)-1)) - x0;
+ xi0 = 0;
+ xi1 = ff_j2k_ceildivpow2(x1 - x0, codsty->log2_cblk_width) << codsty->log2_cblk_width;
+ xi1 = FFMIN(xi1, band->cblknx);
+
+ cblkperprecw = 1<<(codsty->log2_prec_width - codsty->log2_cblk_width);
+ for (precx = 0, precno = 0; precx < reslevel->num_precincts_x; precx++){
+ for (precy = 0; precy < reslevel->num_precincts_y; precy++, precno = 0){
+ J2kPrec *prec = band->prec + precno;
+ prec->xi0 = xi0;
+ prec->xi1 = xi1;
+ prec->cblkincl = ff_j2k_tag_tree_init(prec->xi1 - prec->xi0,
+ prec->yi1 - prec->yi0);
+ prec->zerobits = ff_j2k_tag_tree_init(prec->xi1 - prec->xi0,
+ prec->yi1 - prec->yi0);
+ if (!prec->cblkincl || !prec->zerobits)
+ return AVERROR(ENOMEM);
+
+ }
+ xi1 += cblkperprecw;
+ xi0 = xi1 - cblkperprecw;
+ xi1 = FFMIN(xi1, band->cblknx);
+ }
+ }
+ }
+ return 0;
+}
+
+void ff_j2k_reinit(J2kComponent *comp, J2kCodingStyle *codsty)
+{
+ int reslevelno, bandno, cblkno, precno;
+ for (reslevelno = 0; reslevelno < codsty->nreslevels; reslevelno++){
+ J2kResLevel *rlevel = comp->reslevel + reslevelno;
+ for (bandno = 0; bandno < rlevel->nbands; bandno++){
+ J2kBand *band = rlevel->band + bandno;
+ for(precno = 0; precno < rlevel->num_precincts_x * rlevel->num_precincts_y; precno++){
+ J2kPrec *prec = band->prec + precno;
+ tag_tree_zero(prec->zerobits, prec->xi1 - prec->xi0, prec->yi1 - prec->yi0);
+ tag_tree_zero(prec->cblkincl, prec->xi1 - prec->xi0, prec->yi1 - prec->yi0);
+ }
+ for (cblkno = 0; cblkno < band->cblknx * band->cblkny; cblkno++){
+ J2kCblk *cblk = band->cblk + cblkno;
+ cblk->length = 0;
+ cblk->lblock = 3;
+ }
+ }
+ }
+}
+
+void ff_j2k_cleanup(J2kComponent *comp, J2kCodingStyle *codsty)
+{
+ int reslevelno, bandno, precno;
+ for (reslevelno = 0; reslevelno < codsty->nreslevels; reslevelno++){
+ J2kResLevel *reslevel = comp->reslevel + reslevelno;
+
+ for (bandno = 0; bandno < reslevel->nbands ; bandno++){
+ J2kBand *band = reslevel->band + bandno;
+ for (precno = 0; precno < reslevel->num_precincts_x * reslevel->num_precincts_y; precno++){
+ J2kPrec *prec = band->prec + precno;
+ av_freep(&prec->zerobits);
+ av_freep(&prec->cblkincl);
+ }
+ av_freep(&band->cblk);
+ av_freep(&band->prec);
+ }
+ av_freep(&reslevel->band);
+ }
+
+ ff_j2k_dwt_destroy(&comp->dwt);
+ av_freep(&comp->reslevel);
+ av_freep(&comp->data);
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-10 13:16:54 +0000