| /* |
| * JPEG 2000 encoder and decoder common functions |
| * Copyright (c) 2007 Kamil Nowosad |
| * Copyright (c) 2013 Nicolas Bertrand <nicoinattendu@gmail.com> |
| * |
| * 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 |
| */ |
| |
| /** |
| * @file |
| * JPEG 2000 image encoder and decoder common functions |
| */ |
| |
| #include "libavutil/attributes.h" |
| #include "libavutil/avassert.h" |
| #include "libavutil/common.h" |
| #include "libavutil/imgutils.h" |
| #include "libavutil/mem.h" |
| #include "avcodec.h" |
| #include "internal.h" |
| #include "jpeg2000.h" |
| |
| #define SHL(a, n) ((n) >= 0 ? (a) << (n) : (a) >> -(n)) |
| |
| /* tag tree routines */ |
| |
| /* allocate the memory for tag tree */ |
| static int32_t tag_tree_size(int w, int h) |
| { |
| int64_t res = 0; |
| while (w > 1 || h > 1) { |
| res += w * (int64_t)h; |
| av_assert0(res + 1 < INT32_MAX); |
| w = (w + 1) >> 1; |
| h = (h + 1) >> 1; |
| } |
| return (int32_t)(res + 1); |
| } |
| |
| static Jpeg2000TgtNode *ff_jpeg2000_tag_tree_init(int w, int h) |
| { |
| int pw = w, ph = h; |
| Jpeg2000TgtNode *res, *t, *t2; |
| int32_t tt_size; |
| |
| tt_size = tag_tree_size(w, h); |
| |
| t = res = av_mallocz_array(tt_size, sizeof(*t)); |
| if (!res) |
| 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(Jpeg2000TgtNode *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_jpeg2000_sigctxno_lut[256][4]; |
| |
| static int getsigctxno(int flag, int bandno) |
| { |
| int h, v, d; |
| |
| h = ((flag & JPEG2000_T1_SIG_E) ? 1 : 0) + |
| ((flag & JPEG2000_T1_SIG_W) ? 1 : 0); |
| v = ((flag & JPEG2000_T1_SIG_N) ? 1 : 0) + |
| ((flag & JPEG2000_T1_SIG_S) ? 1 : 0); |
| d = ((flag & JPEG2000_T1_SIG_NE) ? 1 : 0) + |
| ((flag & JPEG2000_T1_SIG_NW) ? 1 : 0) + |
| ((flag & JPEG2000_T1_SIG_SE) ? 1 : 0) + |
| ((flag & JPEG2000_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; |
| } 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_jpeg2000_sgnctxno_lut[16][16], ff_jpeg2000_xorbit_lut[16][16]; |
| |
| 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 } }; |
| |
| static int getsgnctxno(int flag, uint8_t *xorbit) |
| { |
| int vcontrib, hcontrib; |
| |
| hcontrib = contribtab[flag & JPEG2000_T1_SIG_E ? flag & JPEG2000_T1_SGN_E ? 1 : 2 : 0] |
| [flag & JPEG2000_T1_SIG_W ? flag & JPEG2000_T1_SGN_W ? 1 : 2 : 0] + 1; |
| vcontrib = contribtab[flag & JPEG2000_T1_SIG_S ? flag & JPEG2000_T1_SGN_S ? 1 : 2 : 0] |
| [flag & JPEG2000_T1_SIG_N ? flag & JPEG2000_T1_SGN_N ? 1 : 2 : 0] + 1; |
| *xorbit = xorbittab[hcontrib][vcontrib]; |
| |
| return ctxlbltab[hcontrib][vcontrib]; |
| } |
| |
| void av_cold ff_jpeg2000_init_tier1_luts(void) |
| { |
| int i, j; |
| for (i = 0; i < 256; i++) |
| for (j = 0; j < 4; j++) |
| ff_jpeg2000_sigctxno_lut[i][j] = getsigctxno(i, j); |
| for (i = 0; i < 16; i++) |
| for (j = 0; j < 16; j++) |
| ff_jpeg2000_sgnctxno_lut[i][j] = |
| getsgnctxno(i + (j << 8), &ff_jpeg2000_xorbit_lut[i][j]); |
| } |
| |
| void ff_jpeg2000_set_significance(Jpeg2000T1Context *t1, int x, int y, |
| int negative) |
| { |
| x++; |
| y++; |
| t1->flags[(y) * t1->stride + x] |= JPEG2000_T1_SIG; |
| if (negative) { |
| t1->flags[(y) * t1->stride + x + 1] |= JPEG2000_T1_SIG_W | JPEG2000_T1_SGN_W; |
| t1->flags[(y) * t1->stride + x - 1] |= JPEG2000_T1_SIG_E | JPEG2000_T1_SGN_E; |
| t1->flags[(y + 1) * t1->stride + x] |= JPEG2000_T1_SIG_N | JPEG2000_T1_SGN_N; |
| t1->flags[(y - 1) * t1->stride + x] |= JPEG2000_T1_SIG_S | JPEG2000_T1_SGN_S; |
| } else { |
| t1->flags[(y) * t1->stride + x + 1] |= JPEG2000_T1_SIG_W; |
| t1->flags[(y) * t1->stride + x - 1] |= JPEG2000_T1_SIG_E; |
| t1->flags[(y + 1) * t1->stride + x] |= JPEG2000_T1_SIG_N; |
| t1->flags[(y - 1) * t1->stride + x] |= JPEG2000_T1_SIG_S; |
| } |
| t1->flags[(y + 1) * t1->stride + x + 1] |= JPEG2000_T1_SIG_NW; |
| t1->flags[(y + 1) * t1->stride + x - 1] |= JPEG2000_T1_SIG_NE; |
| t1->flags[(y - 1) * t1->stride + x + 1] |= JPEG2000_T1_SIG_SW; |
| t1->flags[(y - 1) * t1->stride + x - 1] |= JPEG2000_T1_SIG_SE; |
| } |
| |
| // static const uint8_t lut_gain[2][4] = { { 0, 0, 0, 0 }, { 0, 1, 1, 2 } }; (unused) |
| |
| static void init_band_stepsize(AVCodecContext *avctx, |
| Jpeg2000Band *band, |
| Jpeg2000CodingStyle *codsty, |
| Jpeg2000QuantStyle *qntsty, |
| int bandno, int gbandno, int reslevelno, |
| int cbps) |
| { |
| /* TODO: Implementation of quantization step not finished, |
| * see ISO/IEC 15444-1:2002 E.1 and A.6.4. */ |
| switch (qntsty->quantsty) { |
| uint8_t gain; |
| case JPEG2000_QSTY_NONE: |
| /* TODO: to verify. No quantization in this case */ |
| band->f_stepsize = 1; |
| break; |
| case JPEG2000_QSTY_SI: |
| /*TODO: Compute formula to implement. */ |
| // numbps = cbps + |
| // lut_gain[codsty->transform == FF_DWT53][bandno + (reslevelno > 0)]; |
| // band->f_stepsize = SHL(2048 + qntsty->mant[gbandno], |
| // 2 + numbps - qntsty->expn[gbandno]); |
| // break; |
| case JPEG2000_QSTY_SE: |
| /* Exponent quantization step. |
| * Formula: |
| * delta_b = 2 ^ (R_b - expn_b) * (1 + (mant_b / 2 ^ 11)) |
| * R_b = R_I + log2 (gain_b ) |
| * see ISO/IEC 15444-1:2002 E.1.1 eqn. E-3 and E-4 */ |
| gain = cbps; |
| band->f_stepsize = ff_exp2fi(gain - qntsty->expn[gbandno]); |
| band->f_stepsize *= qntsty->mant[gbandno] / 2048.0 + 1.0; |
| break; |
| default: |
| band->f_stepsize = 0; |
| av_log(avctx, AV_LOG_ERROR, "Unknown quantization format\n"); |
| break; |
| } |
| if (codsty->transform != FF_DWT53) { |
| int lband = 0; |
| switch (bandno + (reslevelno > 0)) { |
| case 1: |
| case 2: |
| band->f_stepsize *= F_LFTG_X * 2; |
| lband = 1; |
| break; |
| case 3: |
| band->f_stepsize *= F_LFTG_X * F_LFTG_X * 4; |
| break; |
| } |
| if (codsty->transform == FF_DWT97) { |
| band->f_stepsize *= pow(F_LFTG_K, 2*(codsty->nreslevels2decode - reslevelno) + lband - 2); |
| } |
| } |
| |
| band->i_stepsize = band->f_stepsize * (1 << 15); |
| |
| /* FIXME: In openjepg code stespize = stepsize * 0.5. Why? |
| * If not set output of entropic decoder is not correct. */ |
| if (!av_codec_is_encoder(avctx->codec)) |
| band->f_stepsize *= 0.5; |
| } |
| |
| static int init_prec(Jpeg2000Band *band, |
| Jpeg2000ResLevel *reslevel, |
| Jpeg2000Component *comp, |
| int precno, int bandno, int reslevelno, |
| int log2_band_prec_width, |
| int log2_band_prec_height) |
| { |
| Jpeg2000Prec *prec = band->prec + precno; |
| int nb_codeblocks, cblkno; |
| |
| prec->decoded_layers = 0; |
| |
| /* TODO: Explain formula for JPEG200 DCINEMA. */ |
| /* TODO: Verify with previous count of codeblocks per band */ |
| |
| /* Compute P_x0 */ |
| prec->coord[0][0] = ((band->coord[0][0] >> log2_band_prec_width) + precno % reslevel->num_precincts_x) * |
| (1 << log2_band_prec_width); |
| |
| /* Compute P_y0 */ |
| prec->coord[1][0] = ((band->coord[1][0] >> log2_band_prec_height) + precno / reslevel->num_precincts_x) * |
| (1 << log2_band_prec_height); |
| |
| /* Compute P_x1 */ |
| prec->coord[0][1] = prec->coord[0][0] + |
| (1 << log2_band_prec_width); |
| prec->coord[0][0] = FFMAX(prec->coord[0][0], band->coord[0][0]); |
| prec->coord[0][1] = FFMIN(prec->coord[0][1], band->coord[0][1]); |
| |
| /* Compute P_y1 */ |
| prec->coord[1][1] = prec->coord[1][0] + |
| (1 << log2_band_prec_height); |
| prec->coord[1][0] = FFMAX(prec->coord[1][0], band->coord[1][0]); |
| prec->coord[1][1] = FFMIN(prec->coord[1][1], band->coord[1][1]); |
| |
| prec->nb_codeblocks_width = |
| ff_jpeg2000_ceildivpow2(prec->coord[0][1], |
| band->log2_cblk_width) |
| - (prec->coord[0][0] >> band->log2_cblk_width); |
| prec->nb_codeblocks_height = |
| ff_jpeg2000_ceildivpow2(prec->coord[1][1], |
| band->log2_cblk_height) |
| - (prec->coord[1][0] >> band->log2_cblk_height); |
| |
| |
| /* Tag trees initialization */ |
| prec->cblkincl = |
| ff_jpeg2000_tag_tree_init(prec->nb_codeblocks_width, |
| prec->nb_codeblocks_height); |
| if (!prec->cblkincl) |
| return AVERROR(ENOMEM); |
| |
| prec->zerobits = |
| ff_jpeg2000_tag_tree_init(prec->nb_codeblocks_width, |
| prec->nb_codeblocks_height); |
| if (!prec->zerobits) |
| return AVERROR(ENOMEM); |
| |
| if (prec->nb_codeblocks_width * (uint64_t)prec->nb_codeblocks_height > INT_MAX) { |
| prec->cblk = NULL; |
| return AVERROR(ENOMEM); |
| } |
| nb_codeblocks = prec->nb_codeblocks_width * prec->nb_codeblocks_height; |
| prec->cblk = av_mallocz_array(nb_codeblocks, sizeof(*prec->cblk)); |
| if (!prec->cblk) |
| return AVERROR(ENOMEM); |
| for (cblkno = 0; cblkno < nb_codeblocks; cblkno++) { |
| Jpeg2000Cblk *cblk = prec->cblk + cblkno; |
| int Cx0, Cy0; |
| |
| /* Compute coordinates of codeblocks */ |
| /* Compute Cx0*/ |
| Cx0 = ((prec->coord[0][0]) >> band->log2_cblk_width) << band->log2_cblk_width; |
| Cx0 = Cx0 + ((cblkno % prec->nb_codeblocks_width) << band->log2_cblk_width); |
| cblk->coord[0][0] = FFMAX(Cx0, prec->coord[0][0]); |
| |
| /* Compute Cy0*/ |
| Cy0 = ((prec->coord[1][0]) >> band->log2_cblk_height) << band->log2_cblk_height; |
| Cy0 = Cy0 + ((cblkno / prec->nb_codeblocks_width) << band->log2_cblk_height); |
| cblk->coord[1][0] = FFMAX(Cy0, prec->coord[1][0]); |
| |
| /* Compute Cx1 */ |
| cblk->coord[0][1] = FFMIN(Cx0 + (1 << band->log2_cblk_width), |
| prec->coord[0][1]); |
| |
| /* Compute Cy1 */ |
| cblk->coord[1][1] = FFMIN(Cy0 + (1 << band->log2_cblk_height), |
| prec->coord[1][1]); |
| /* Update code-blocks coordinates according sub-band position */ |
| if ((bandno + !!reslevelno) & 1) { |
| cblk->coord[0][0] += comp->reslevel[reslevelno-1].coord[0][1] - |
| comp->reslevel[reslevelno-1].coord[0][0]; |
| cblk->coord[0][1] += comp->reslevel[reslevelno-1].coord[0][1] - |
| comp->reslevel[reslevelno-1].coord[0][0]; |
| } |
| if ((bandno + !!reslevelno) & 2) { |
| cblk->coord[1][0] += comp->reslevel[reslevelno-1].coord[1][1] - |
| comp->reslevel[reslevelno-1].coord[1][0]; |
| cblk->coord[1][1] += comp->reslevel[reslevelno-1].coord[1][1] - |
| comp->reslevel[reslevelno-1].coord[1][0]; |
| } |
| |
| cblk->zero = 0; |
| cblk->lblock = 3; |
| cblk->length = 0; |
| memset(cblk->lengthinc, 0, sizeof(cblk->lengthinc)); |
| cblk->npasses = 0; |
| } |
| |
| return 0; |
| } |
| |
| static int init_band(AVCodecContext *avctx, |
| Jpeg2000ResLevel *reslevel, |
| Jpeg2000Component *comp, |
| Jpeg2000CodingStyle *codsty, |
| Jpeg2000QuantStyle *qntsty, |
| int bandno, int gbandno, int reslevelno, |
| int cbps, int dx, int dy) |
| { |
| Jpeg2000Band *band = reslevel->band + bandno; |
| uint8_t log2_band_prec_width, log2_band_prec_height; |
| int declvl = codsty->nreslevels - reslevelno; // N_L -r see ISO/IEC 15444-1:2002 B.5 |
| int precno; |
| int nb_precincts; |
| int i, j, ret; |
| |
| init_band_stepsize(avctx, band, codsty, qntsty, bandno, gbandno, reslevelno, cbps); |
| |
| /* computation of tbx_0, tbx_1, tby_0, tby_1 |
| * see ISO/IEC 15444-1:2002 B.5 eq. B-15 and tbl B.1 |
| * codeblock width and height is computed for |
| * DCI JPEG 2000 codeblock_width = codeblock_width = 32 = 2 ^ 5 */ |
| if (reslevelno == 0) { |
| /* for reslevelno = 0, only one band, x0_b = y0_b = 0 */ |
| for (i = 0; i < 2; i++) |
| for (j = 0; j < 2; j++) |
| band->coord[i][j] = |
| ff_jpeg2000_ceildivpow2(comp->coord_o[i][j], |
| declvl - 1); |
| log2_band_prec_width = reslevel->log2_prec_width; |
| log2_band_prec_height = reslevel->log2_prec_height; |
| /* see ISO/IEC 15444-1:2002 eq. B-17 and eq. B-15 */ |
| band->log2_cblk_width = FFMIN(codsty->log2_cblk_width, |
| reslevel->log2_prec_width); |
| band->log2_cblk_height = FFMIN(codsty->log2_cblk_height, |
| reslevel->log2_prec_height); |
| } else { |
| /* 3 bands x0_b = 1 y0_b = 0; x0_b = 0 y0_b = 1; x0_b = y0_b = 1 */ |
| /* x0_b and y0_b are computed with ((bandno + 1 >> i) & 1) */ |
| for (i = 0; i < 2; i++) |
| for (j = 0; j < 2; j++) |
| /* Formula example for tbx_0 = ceildiv((tcx_0 - 2 ^ (declvl - 1) * x0_b) / declvl) */ |
| band->coord[i][j] = |
| ff_jpeg2000_ceildivpow2(comp->coord_o[i][j] - |
| (((bandno + 1 >> i) & 1LL) << declvl - 1), |
| declvl); |
| /* TODO: Manage case of 3 band offsets here or |
| * in coding/decoding function? */ |
| |
| /* see ISO/IEC 15444-1:2002 eq. B-17 and eq. B-15 */ |
| band->log2_cblk_width = FFMIN(codsty->log2_cblk_width, |
| reslevel->log2_prec_width - 1); |
| band->log2_cblk_height = FFMIN(codsty->log2_cblk_height, |
| reslevel->log2_prec_height - 1); |
| |
| log2_band_prec_width = reslevel->log2_prec_width - 1; |
| log2_band_prec_height = reslevel->log2_prec_height - 1; |
| } |
| |
| if (reslevel->num_precincts_x * (uint64_t)reslevel->num_precincts_y > INT_MAX) { |
| band->prec = NULL; |
| return AVERROR(ENOMEM); |
| } |
| nb_precincts = reslevel->num_precincts_x * reslevel->num_precincts_y; |
| band->prec = av_mallocz_array(nb_precincts, sizeof(*band->prec)); |
| if (!band->prec) |
| return AVERROR(ENOMEM); |
| |
| for (precno = 0; precno < nb_precincts; precno++) { |
| ret = init_prec(band, reslevel, comp, |
| precno, bandno, reslevelno, |
| log2_band_prec_width, log2_band_prec_height); |
| if (ret < 0) |
| return ret; |
| } |
| |
| return 0; |
| } |
| |
| int ff_jpeg2000_init_component(Jpeg2000Component *comp, |
| Jpeg2000CodingStyle *codsty, |
| Jpeg2000QuantStyle *qntsty, |
| int cbps, int dx, int dy, |
| AVCodecContext *avctx) |
| { |
| int reslevelno, bandno, gbandno = 0, ret, i, j; |
| uint32_t csize; |
| |
| if (codsty->nreslevels2decode <= 0) { |
| av_log(avctx, AV_LOG_ERROR, "nreslevels2decode %d invalid or uninitialized\n", codsty->nreslevels2decode); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| if (ret = ff_jpeg2000_dwt_init(&comp->dwt, comp->coord, |
| codsty->nreslevels2decode - 1, |
| codsty->transform)) |
| return ret; |
| |
| if (av_image_check_size(comp->coord[0][1] - comp->coord[0][0], |
| comp->coord[1][1] - comp->coord[1][0], 0, avctx)) |
| return AVERROR_INVALIDDATA; |
| csize = (comp->coord[0][1] - comp->coord[0][0]) * |
| (comp->coord[1][1] - comp->coord[1][0]); |
| if (comp->coord[0][1] - comp->coord[0][0] > 32768 || |
| comp->coord[1][1] - comp->coord[1][0] > 32768) { |
| av_log(avctx, AV_LOG_ERROR, "component size too large\n"); |
| return AVERROR_PATCHWELCOME; |
| } |
| |
| if (codsty->transform == FF_DWT97) { |
| csize += AV_INPUT_BUFFER_PADDING_SIZE / sizeof(*comp->f_data); |
| comp->i_data = NULL; |
| comp->f_data = av_mallocz_array(csize, sizeof(*comp->f_data)); |
| if (!comp->f_data) |
| return AVERROR(ENOMEM); |
| } else { |
| csize += AV_INPUT_BUFFER_PADDING_SIZE / sizeof(*comp->i_data); |
| comp->f_data = NULL; |
| comp->i_data = av_mallocz_array(csize, sizeof(*comp->i_data)); |
| if (!comp->i_data) |
| return AVERROR(ENOMEM); |
| } |
| comp->reslevel = av_mallocz_array(codsty->nreslevels, sizeof(*comp->reslevel)); |
| if (!comp->reslevel) |
| return AVERROR(ENOMEM); |
| /* LOOP on resolution levels */ |
| for (reslevelno = 0; reslevelno < codsty->nreslevels; reslevelno++) { |
| int declvl = codsty->nreslevels - reslevelno; // N_L -r see ISO/IEC 15444-1:2002 B.5 |
| Jpeg2000ResLevel *reslevel = comp->reslevel + reslevelno; |
| |
| /* Compute borders for each resolution level. |
| * Computation of trx_0, trx_1, try_0 and try_1. |
| * see ISO/IEC 15444-1:2002 eq. B.5 and B-14 */ |
| for (i = 0; i < 2; i++) |
| for (j = 0; j < 2; j++) |
| reslevel->coord[i][j] = |
| ff_jpeg2000_ceildivpow2(comp->coord_o[i][j], declvl - 1); |
| // update precincts size: 2^n value |
| reslevel->log2_prec_width = codsty->log2_prec_widths[reslevelno]; |
| reslevel->log2_prec_height = codsty->log2_prec_heights[reslevelno]; |
| |
| /* Number of bands for each resolution level */ |
| if (reslevelno == 0) |
| reslevel->nbands = 1; |
| else |
| reslevel->nbands = 3; |
| |
| /* Number of precincts which span the tile for resolution level reslevelno |
| * see B.6 in ISO/IEC 15444-1:2002 eq. B-16 |
| * num_precincts_x = |- trx_1 / 2 ^ log2_prec_width) -| - (trx_0 / 2 ^ log2_prec_width) |
| * num_precincts_y = |- try_1 / 2 ^ log2_prec_width) -| - (try_0 / 2 ^ log2_prec_width) |
| * for Dcinema profiles in JPEG 2000 |
| * num_precincts_x = |- trx_1 / 2 ^ log2_prec_width) -| |
| * num_precincts_y = |- try_1 / 2 ^ log2_prec_width) -| */ |
| 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], |
| reslevel->log2_prec_width) - |
| (reslevel->coord[0][0] >> reslevel->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], |
| reslevel->log2_prec_height) - |
| (reslevel->coord[1][0] >> reslevel->log2_prec_height); |
| |
| reslevel->band = av_mallocz_array(reslevel->nbands, sizeof(*reslevel->band)); |
| if (!reslevel->band) |
| return AVERROR(ENOMEM); |
| |
| for (bandno = 0; bandno < reslevel->nbands; bandno++, gbandno++) { |
| ret = init_band(avctx, reslevel, |
| comp, codsty, qntsty, |
| bandno, gbandno, reslevelno, |
| cbps, dx, dy); |
| if (ret < 0) |
| return ret; |
| } |
| } |
| return 0; |
| } |
| |
| void ff_jpeg2000_reinit(Jpeg2000Component *comp, Jpeg2000CodingStyle *codsty) |
| { |
| int reslevelno, bandno, cblkno, precno; |
| for (reslevelno = 0; reslevelno < codsty->nreslevels; reslevelno++) { |
| Jpeg2000ResLevel *rlevel = comp->reslevel + reslevelno; |
| for (bandno = 0; bandno < rlevel->nbands; bandno++) { |
| Jpeg2000Band *band = rlevel->band + bandno; |
| for(precno = 0; precno < rlevel->num_precincts_x * rlevel->num_precincts_y; precno++) { |
| Jpeg2000Prec *prec = band->prec + precno; |
| tag_tree_zero(prec->zerobits, prec->nb_codeblocks_width, prec->nb_codeblocks_height); |
| tag_tree_zero(prec->cblkincl, prec->nb_codeblocks_width, prec->nb_codeblocks_height); |
| for (cblkno = 0; cblkno < prec->nb_codeblocks_width * prec->nb_codeblocks_height; cblkno++) { |
| Jpeg2000Cblk *cblk = prec->cblk + cblkno; |
| cblk->length = 0; |
| cblk->lblock = 3; |
| } |
| } |
| } |
| } |
| } |
| |
| void ff_jpeg2000_cleanup(Jpeg2000Component *comp, Jpeg2000CodingStyle *codsty) |
| { |
| int reslevelno, bandno, precno; |
| for (reslevelno = 0; |
| comp->reslevel && reslevelno < codsty->nreslevels; |
| reslevelno++) { |
| Jpeg2000ResLevel *reslevel; |
| |
| if (!comp->reslevel) |
| continue; |
| |
| reslevel = comp->reslevel + reslevelno; |
| for (bandno = 0; bandno < reslevel->nbands; bandno++) { |
| Jpeg2000Band *band; |
| |
| if (!reslevel->band) |
| continue; |
| |
| band = reslevel->band + bandno; |
| for (precno = 0; precno < reslevel->num_precincts_x * reslevel->num_precincts_y; precno++) { |
| if (band->prec) { |
| Jpeg2000Prec *prec = band->prec + precno; |
| av_freep(&prec->zerobits); |
| av_freep(&prec->cblkincl); |
| av_freep(&prec->cblk); |
| } |
| } |
| |
| av_freep(&band->prec); |
| } |
| av_freep(&reslevel->band); |
| } |
| |
| ff_dwt_destroy(&comp->dwt); |
| av_freep(&comp->reslevel); |
| av_freep(&comp->i_data); |
| av_freep(&comp->f_data); |
| } |
