int ff_j2k_init_component(Jpeg2000Component *comp, Jpeg2000CodingStyle *codsty, Jpeg2000QuantStyle *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(Jpeg2000ResLevel)); if (!comp->reslevel) return AVERROR(ENOMEM); for (reslevelno = 0; reslevelno < codsty->nreslevels; reslevelno++) { int declvl = codsty->nreslevels - reslevelno; Jpeg2000ResLevel *reslevel = comp->reslevel + reslevelno; for (i = 0; i < 2; i++) for (j = 0; j < 2; j++) reslevel->coord[i][j] = ff_jpeg2000_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_jpeg2000_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_jpeg2000_ceildivpow2(reslevel->coord[1][1], codsty->log2_prec_height) - (reslevel->coord[1][0] >> codsty->log2_prec_height); reslevel->band = av_malloc(reslevel->nbands * sizeof(Jpeg2000Band)); if (!reslevel->band) return AVERROR(ENOMEM); for (bandno = 0; bandno < reslevel->nbands; bandno++, gbandno++) { Jpeg2000Band *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 != JPEG2000_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_jpeg2000_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_jpeg2000_ceildivpow2(comp->coord[i][j] - (((bandno+1>>i)&1) << declvl-1), declvl); } band->cblknx = ff_jpeg2000_ceildiv(band->coord[0][1], band->codeblock_width) - band->coord[0][0] / band->codeblock_width; band->cblkny = ff_jpeg2000_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_jpeg2000_ceildiv(band->coord[0][j], dx); for (j = 0; j < 2; j++) band->coord[1][j] = ff_jpeg2000_ceildiv(band->coord[1][j], dy); band->cblknx = ff_jpeg2000_ceildiv(band->cblknx, dx); band->cblkny = ff_jpeg2000_ceildiv(band->cblkny, dy); band->cblk = av_malloc(sizeof(Jpeg2000Cblk) * band->cblknx * band->cblkny); if (!band->cblk) return AVERROR(ENOMEM); band->prec = av_malloc(sizeof(Jpeg2000Cblk) * reslevel->num_precincts_x * reslevel->num_precincts_y); if (!band->prec) return AVERROR(ENOMEM); for (cblkno = 0; cblkno < band->cblknx * band->cblkny; cblkno++) { Jpeg2000Cblk *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_jpeg2000_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_jpeg2000_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) { Jpeg2000Prec *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; }