| /* |
| * 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; |
| } |
| assert(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); |
| } |
