/* * 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); }