diff options
Diffstat (limited to 'libavcodec/j2k.c')
| -rw-r--r-- | libavcodec/j2k.c | 391 |
1 files changed, 391 insertions, 0 deletions
diff --git a/libavcodec/j2k.c b/libavcodec/j2k.c new file mode 100644 index 0000000000..606a3d8b8b --- /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){ + static const 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); +} |