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511 lines
20 KiB
511 lines
20 KiB
/* |
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* JPEG 2000 encoder and decoder common functions |
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* Copyright (c) 2007 Kamil Nowosad |
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* Copyright (c) 2013 Nicolas Bertrand <nicoinattendu@gmail.com> |
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* |
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* This file is part of Libav. |
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* |
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* Libav is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* Libav is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with Libav; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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|
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/** |
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* @file |
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* JPEG 2000 image encoder and decoder common functions |
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*/ |
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|
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#include "libavutil/attributes.h" |
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#include "libavutil/common.h" |
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#include "libavutil/mem.h" |
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#include "avcodec.h" |
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#include "jpeg2000.h" |
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|
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#define SHL(a, n) ((n) >= 0 ? (a) << (n) : (a) >> -(n)) |
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|
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/* tag tree routines */ |
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|
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/* allocate the memory for tag tree */ |
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static int32_t tag_tree_size(uint16_t w, uint16_t h) |
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{ |
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uint32_t res = 0; |
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while (w > 1 || h > 1) { |
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res += w * h; |
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if (res + 1 >= INT32_MAX) |
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return -1; |
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w = (w + 1) >> 1; |
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h = (h + 1) >> 1; |
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} |
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return (int32_t)(res + 1); |
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} |
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static Jpeg2000TgtNode *ff_jpeg2000_tag_tree_init(int w, int h) |
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{ |
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int pw = w, ph = h; |
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Jpeg2000TgtNode *res, *t, *t2; |
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int32_t tt_size; |
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tt_size = tag_tree_size(w, h); |
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if (tt_size == -1) |
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return NULL; |
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t = res = av_mallocz_array(tt_size, sizeof(*t)); |
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if (!res) |
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return NULL; |
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while (w > 1 || h > 1) { |
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int i, j; |
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pw = w; |
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ph = h; |
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w = (w + 1) >> 1; |
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h = (h + 1) >> 1; |
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t2 = t + pw * ph; |
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for (i = 0; i < ph; i++) |
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for (j = 0; j < pw; j++) |
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t[i * pw + j].parent = &t2[(i >> 1) * w + (j >> 1)]; |
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t = t2; |
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} |
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t[0].parent = NULL; |
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return res; |
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} |
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uint8_t ff_jpeg2000_sigctxno_lut[256][4]; |
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|
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static int getsigctxno(int flag, int bandno) |
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{ |
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int h, v, d; |
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h = ((flag & JPEG2000_T1_SIG_E) ? 1 : 0) + |
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((flag & JPEG2000_T1_SIG_W) ? 1 : 0); |
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v = ((flag & JPEG2000_T1_SIG_N) ? 1 : 0) + |
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((flag & JPEG2000_T1_SIG_S) ? 1 : 0); |
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d = ((flag & JPEG2000_T1_SIG_NE) ? 1 : 0) + |
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((flag & JPEG2000_T1_SIG_NW) ? 1 : 0) + |
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((flag & JPEG2000_T1_SIG_SE) ? 1 : 0) + |
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((flag & JPEG2000_T1_SIG_SW) ? 1 : 0); |
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if (bandno < 3) { |
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if (bandno == 1) |
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FFSWAP(int, h, v); |
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if (h == 2) |
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return 8; |
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if (h == 1) { |
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if (v >= 1) |
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return 7; |
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if (d >= 1) |
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return 6; |
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return 5; |
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} |
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if (v == 2) |
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return 4; |
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if (v == 1) |
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return 3; |
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if (d >= 2) |
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return 2; |
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if (d == 1) |
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return 1; |
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} else { |
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if (d >= 3) |
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return 8; |
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if (d == 2) { |
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if (h + v >= 1) |
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return 7; |
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return 6; |
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} |
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if (d == 1) { |
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if (h + v >= 2) |
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return 5; |
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if (h + v == 1) |
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return 4; |
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return 3; |
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} |
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if (h + v >= 2) |
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return 2; |
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if (h + v == 1) |
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return 1; |
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} |
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return 0; |
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} |
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uint8_t ff_jpeg2000_sgnctxno_lut[16][16], ff_jpeg2000_xorbit_lut[16][16]; |
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static const int contribtab[3][3] = { { 0, -1, 1 }, { -1, -1, 0 }, { 1, 0, 1 } }; |
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static const int ctxlbltab[3][3] = { { 13, 12, 11 }, { 10, 9, 10 }, { 11, 12, 13 } }; |
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static const int xorbittab[3][3] = { { 1, 1, 1 }, { 1, 0, 0 }, { 0, 0, 0 } }; |
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static int getsgnctxno(int flag, uint8_t *xorbit) |
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{ |
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int vcontrib, hcontrib; |
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hcontrib = contribtab[flag & JPEG2000_T1_SIG_E ? flag & JPEG2000_T1_SGN_E ? 1 : 2 : 0] |
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[flag & JPEG2000_T1_SIG_W ? flag & JPEG2000_T1_SGN_W ? 1 : 2 : 0] + 1; |
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vcontrib = contribtab[flag & JPEG2000_T1_SIG_S ? flag & JPEG2000_T1_SGN_S ? 1 : 2 : 0] |
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[flag & JPEG2000_T1_SIG_N ? flag & JPEG2000_T1_SGN_N ? 1 : 2 : 0] + 1; |
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*xorbit = xorbittab[hcontrib][vcontrib]; |
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return ctxlbltab[hcontrib][vcontrib]; |
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} |
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void av_cold ff_jpeg2000_init_tier1_luts(void) |
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{ |
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int i, j; |
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for (i = 0; i < 256; i++) |
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for (j = 0; j < 4; j++) |
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ff_jpeg2000_sigctxno_lut[i][j] = getsigctxno(i, j); |
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for (i = 0; i < 16; i++) |
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for (j = 0; j < 16; j++) |
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ff_jpeg2000_sgnctxno_lut[i][j] = |
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getsgnctxno(i + (j << 8), &ff_jpeg2000_xorbit_lut[i][j]); |
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} |
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void ff_jpeg2000_set_significance(Jpeg2000T1Context *t1, int x, int y, |
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int negative) |
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{ |
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x++; |
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y++; |
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t1->flags[y][x] |= JPEG2000_T1_SIG; |
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if (negative) { |
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t1->flags[y][x + 1] |= JPEG2000_T1_SIG_W | JPEG2000_T1_SGN_W; |
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t1->flags[y][x - 1] |= JPEG2000_T1_SIG_E | JPEG2000_T1_SGN_E; |
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t1->flags[y + 1][x] |= JPEG2000_T1_SIG_N | JPEG2000_T1_SGN_N; |
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t1->flags[y - 1][x] |= JPEG2000_T1_SIG_S | JPEG2000_T1_SGN_S; |
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} else { |
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t1->flags[y][x + 1] |= JPEG2000_T1_SIG_W; |
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t1->flags[y][x - 1] |= JPEG2000_T1_SIG_E; |
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t1->flags[y + 1][x] |= JPEG2000_T1_SIG_N; |
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t1->flags[y - 1][x] |= JPEG2000_T1_SIG_S; |
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} |
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t1->flags[y + 1][x + 1] |= JPEG2000_T1_SIG_NW; |
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t1->flags[y + 1][x - 1] |= JPEG2000_T1_SIG_NE; |
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t1->flags[y - 1][x + 1] |= JPEG2000_T1_SIG_SW; |
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t1->flags[y - 1][x - 1] |= JPEG2000_T1_SIG_SE; |
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} |
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static const uint8_t lut_gain[2][4] = { { 0, 0, 0, 0 }, { 0, 1, 1, 2 } }; |
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int ff_jpeg2000_init_component(Jpeg2000Component *comp, |
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Jpeg2000CodingStyle *codsty, |
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Jpeg2000QuantStyle *qntsty, |
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int cbps, int dx, int dy, |
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AVCodecContext *avctx) |
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{ |
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uint8_t log2_band_prec_width, log2_band_prec_height; |
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int reslevelno, bandno, gbandno = 0, ret, i, j; |
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uint32_t csize; |
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if (!codsty->nreslevels2decode) { |
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av_log(avctx, AV_LOG_ERROR, "nreslevels2decode uninitialized\n"); |
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return AVERROR_INVALIDDATA; |
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} |
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if (ret = ff_jpeg2000_dwt_init(&comp->dwt, comp->coord, |
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codsty->nreslevels2decode - 1, |
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codsty->transform)) |
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return ret; |
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// component size comp->coord is uint16_t so ir cannot overflow |
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csize = (comp->coord[0][1] - comp->coord[0][0]) * |
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(comp->coord[1][1] - comp->coord[1][0]); |
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if (codsty->transform == FF_DWT97) { |
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comp->i_data = NULL; |
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comp->f_data = av_malloc_array(csize, sizeof(*comp->f_data)); |
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if (!comp->f_data) |
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return AVERROR(ENOMEM); |
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} else { |
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comp->f_data = NULL; |
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comp->i_data = av_malloc_array(csize, sizeof(*comp->i_data)); |
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if (!comp->i_data) |
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return AVERROR(ENOMEM); |
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} |
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comp->reslevel = av_malloc_array(codsty->nreslevels, sizeof(*comp->reslevel)); |
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if (!comp->reslevel) |
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return AVERROR(ENOMEM); |
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/* LOOP on resolution levels */ |
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for (reslevelno = 0; reslevelno < codsty->nreslevels; reslevelno++) { |
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int declvl = codsty->nreslevels - reslevelno; // N_L -r see ISO/IEC 15444-1:2002 B.5 |
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Jpeg2000ResLevel *reslevel = comp->reslevel + reslevelno; |
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/* Compute borders for each resolution level. |
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* Computation of trx_0, trx_1, try_0 and try_1. |
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* see ISO/IEC 15444-1:2002 eq. B.5 and B-14 */ |
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for (i = 0; i < 2; i++) |
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for (j = 0; j < 2; j++) |
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reslevel->coord[i][j] = |
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ff_jpeg2000_ceildivpow2(comp->coord_o[i][j], declvl - 1); |
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// update precincts size: 2^n value |
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reslevel->log2_prec_width = codsty->log2_prec_widths[reslevelno]; |
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reslevel->log2_prec_height = codsty->log2_prec_heights[reslevelno]; |
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/* Number of bands for each resolution level */ |
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if (reslevelno == 0) |
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reslevel->nbands = 1; |
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else |
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reslevel->nbands = 3; |
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/* Number of precincts wich span the tile for resolution level reslevelno |
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* see B.6 in ISO/IEC 15444-1:2002 eq. B-16 |
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* num_precincts_x = |- trx_1 / 2 ^ log2_prec_width) -| - (trx_0 / 2 ^ log2_prec_width) |
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* num_precincts_y = |- try_1 / 2 ^ log2_prec_width) -| - (try_0 / 2 ^ log2_prec_width) |
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* for Dcinema profiles in JPEG 2000 |
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* num_precincts_x = |- trx_1 / 2 ^ log2_prec_width) -| |
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* num_precincts_y = |- try_1 / 2 ^ log2_prec_width) -| */ |
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if (reslevel->coord[0][1] == reslevel->coord[0][0]) |
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reslevel->num_precincts_x = 0; |
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else |
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reslevel->num_precincts_x = |
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ff_jpeg2000_ceildivpow2(reslevel->coord[0][1], |
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reslevel->log2_prec_width) - |
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(reslevel->coord[0][0] >> reslevel->log2_prec_width); |
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if (reslevel->coord[1][1] == reslevel->coord[1][0]) |
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reslevel->num_precincts_y = 0; |
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else |
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reslevel->num_precincts_y = |
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ff_jpeg2000_ceildivpow2(reslevel->coord[1][1], |
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reslevel->log2_prec_height) - |
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(reslevel->coord[1][0] >> reslevel->log2_prec_height); |
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reslevel->band = av_malloc_array(reslevel->nbands, sizeof(*reslevel->band)); |
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if (!reslevel->band) |
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return AVERROR(ENOMEM); |
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for (bandno = 0; bandno < reslevel->nbands; bandno++, gbandno++) { |
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Jpeg2000Band *band = reslevel->band + bandno; |
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int cblkno, precno; |
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int nb_precincts; |
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/* TODO: Implementation of quantization step not finished, |
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* see ISO/IEC 15444-1:2002 E.1 and A.6.4. */ |
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switch (qntsty->quantsty) { |
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uint8_t gain; |
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int numbps; |
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case JPEG2000_QSTY_NONE: |
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/* TODO: to verify. No quantization in this case */ |
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band->f_stepsize = 1; |
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break; |
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case JPEG2000_QSTY_SI: |
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/*TODO: Compute formula to implement. */ |
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numbps = cbps + |
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lut_gain[codsty->transform == FF_DWT53][bandno + (reslevelno > 0)]; |
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band->f_stepsize = SHL(2048 + qntsty->mant[gbandno], |
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2 + numbps - qntsty->expn[gbandno]); |
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break; |
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case JPEG2000_QSTY_SE: |
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/* Exponent quantization step. |
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* Formula: |
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* delta_b = 2 ^ (R_b - expn_b) * (1 + (mant_b / 2 ^ 11)) |
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* R_b = R_I + log2 (gain_b ) |
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* see ISO/IEC 15444-1:2002 E.1.1 eqn. E-3 and E-4 */ |
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/* TODO/WARN: value of log2 (gain_b ) not taken into account |
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* but it works (compared to OpenJPEG). Why? |
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* Further investigation needed. */ |
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gain = cbps; |
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band->f_stepsize = pow(2.0, gain - qntsty->expn[gbandno]); |
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band->f_stepsize *= qntsty->mant[gbandno] / 2048.0 + 1.0; |
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break; |
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default: |
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band->f_stepsize = 0; |
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av_log(avctx, AV_LOG_ERROR, "Unknown quantization format\n"); |
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break; |
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} |
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/* FIXME: In openjepg code stespize = stepsize * 0.5. Why? |
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* If not set output of entropic decoder is not correct. */ |
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if (!av_codec_is_encoder(avctx->codec)) |
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band->f_stepsize *= 0.5; |
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band->i_stepsize = band->f_stepsize * (1 << 16); |
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|
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/* computation of tbx_0, tbx_1, tby_0, tby_1 |
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* see ISO/IEC 15444-1:2002 B.5 eq. B-15 and tbl B.1 |
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* codeblock width and height is computed for |
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* DCI JPEG 2000 codeblock_width = codeblock_width = 32 = 2 ^ 5 */ |
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if (reslevelno == 0) { |
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/* for reslevelno = 0, only one band, x0_b = y0_b = 0 */ |
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for (i = 0; i < 2; i++) |
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for (j = 0; j < 2; j++) |
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band->coord[i][j] = |
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ff_jpeg2000_ceildivpow2(comp->coord_o[i][j] - comp->coord_o[i][0], |
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declvl - 1); |
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log2_band_prec_width = reslevel->log2_prec_width; |
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log2_band_prec_height = reslevel->log2_prec_height; |
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/* see ISO/IEC 15444-1:2002 eq. B-17 and eq. B-15 */ |
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band->log2_cblk_width = FFMIN(codsty->log2_cblk_width, |
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reslevel->log2_prec_width); |
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band->log2_cblk_height = FFMIN(codsty->log2_cblk_height, |
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reslevel->log2_prec_height); |
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} else { |
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/* 3 bands x0_b = 1 y0_b = 0; x0_b = 0 y0_b = 1; x0_b = y0_b = 1 */ |
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/* x0_b and y0_b are computed with ((bandno + 1 >> i) & 1) */ |
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for (i = 0; i < 2; i++) |
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for (j = 0; j < 2; j++) |
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/* Formula example for tbx_0 = ceildiv((tcx_0 - 2 ^ (declvl - 1) * x0_b) / declvl) */ |
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band->coord[i][j] = |
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ff_jpeg2000_ceildivpow2(comp->coord_o[i][j] - comp->coord_o[i][0] - |
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(((bandno + 1 >> i) & 1) << declvl - 1), |
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declvl); |
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/* TODO: Manage case of 3 band offsets here or |
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* in coding/decoding function? */ |
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|
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/* see ISO/IEC 15444-1:2002 eq. B-17 and eq. B-15 */ |
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band->log2_cblk_width = FFMIN(codsty->log2_cblk_width, |
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reslevel->log2_prec_width - 1); |
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band->log2_cblk_height = FFMIN(codsty->log2_cblk_height, |
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reslevel->log2_prec_height - 1); |
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|
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log2_band_prec_width = reslevel->log2_prec_width - 1; |
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log2_band_prec_height = reslevel->log2_prec_height - 1; |
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} |
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|
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for (j = 0; j < 2; j++) |
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band->coord[0][j] = ff_jpeg2000_ceildiv(band->coord[0][j], dx); |
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for (j = 0; j < 2; j++) |
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band->coord[1][j] = ff_jpeg2000_ceildiv(band->coord[1][j], dy); |
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|
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band->prec = av_malloc_array(reslevel->num_precincts_x * |
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reslevel->num_precincts_y, |
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sizeof(*band->prec)); |
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if (!band->prec) |
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return AVERROR(ENOMEM); |
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|
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nb_precincts = reslevel->num_precincts_x * reslevel->num_precincts_y; |
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|
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for (precno = 0; precno < nb_precincts; precno++) { |
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Jpeg2000Prec *prec = band->prec + precno; |
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|
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/* TODO: Explain formula for JPEG200 DCINEMA. */ |
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/* TODO: Verify with previous count of codeblocks per band */ |
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|
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/* Compute P_x0 */ |
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prec->coord[0][0] = (precno % reslevel->num_precincts_x) * |
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(1 << log2_band_prec_width); |
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prec->coord[0][0] = FFMAX(prec->coord[0][0], band->coord[0][0]); |
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|
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/* Compute P_y0 */ |
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prec->coord[1][0] = (precno / reslevel->num_precincts_x) * |
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(1 << log2_band_prec_height); |
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prec->coord[1][0] = FFMAX(prec->coord[1][0], band->coord[1][0]); |
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|
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/* Compute P_x1 */ |
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prec->coord[0][1] = prec->coord[0][0] + |
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(1 << log2_band_prec_width); |
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prec->coord[0][1] = FFMIN(prec->coord[0][1], band->coord[0][1]); |
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|
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/* Compute P_y1 */ |
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prec->coord[1][1] = prec->coord[1][0] + |
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(1 << log2_band_prec_height); |
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prec->coord[1][1] = FFMIN(prec->coord[1][1], band->coord[1][1]); |
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|
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prec->nb_codeblocks_width = |
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ff_jpeg2000_ceildivpow2(prec->coord[0][1] - |
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prec->coord[0][0], |
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band->log2_cblk_width); |
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prec->nb_codeblocks_height = |
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ff_jpeg2000_ceildivpow2(prec->coord[1][1] - |
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prec->coord[1][0], |
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band->log2_cblk_height); |
|
|
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/* Tag trees initialization */ |
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prec->cblkincl = |
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ff_jpeg2000_tag_tree_init(prec->nb_codeblocks_width, |
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prec->nb_codeblocks_height); |
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if (!prec->cblkincl) |
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return AVERROR(ENOMEM); |
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|
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prec->zerobits = |
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ff_jpeg2000_tag_tree_init(prec->nb_codeblocks_width, |
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prec->nb_codeblocks_height); |
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if (!prec->zerobits) |
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return AVERROR(ENOMEM); |
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|
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prec->cblk = av_mallocz_array(prec->nb_codeblocks_width * |
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prec->nb_codeblocks_height, |
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sizeof(*prec->cblk)); |
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if (!prec->cblk) |
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return AVERROR(ENOMEM); |
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for (cblkno = 0; cblkno < prec->nb_codeblocks_width * prec->nb_codeblocks_height; cblkno++) { |
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Jpeg2000Cblk *cblk = prec->cblk + cblkno; |
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uint16_t Cx0, Cy0; |
|
|
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/* Compute coordinates of codeblocks */ |
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/* Compute Cx0*/ |
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Cx0 = (prec->coord[0][0] >> band->log2_cblk_width) << band->log2_cblk_width; |
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Cx0 = Cx0 + ((cblkno % prec->nb_codeblocks_width) << band->log2_cblk_width); |
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cblk->coord[0][0] = FFMAX(Cx0, prec->coord[0][0]); |
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|
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/* Compute Cy0*/ |
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Cy0 = (prec->coord[1][0] >> band->log2_cblk_height) << band->log2_cblk_height; |
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Cy0 = Cy0 + ((cblkno / prec->nb_codeblocks_width) << band->log2_cblk_height); |
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cblk->coord[1][0] = FFMAX(Cy0, prec->coord[1][0]); |
|
|
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/* Compute Cx1 */ |
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cblk->coord[0][1] = FFMIN(Cx0 + (1 << band->log2_cblk_width), |
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prec->coord[0][1]); |
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|
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/* Compute Cy1 */ |
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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; |
|
cblk->lengthinc = 0; |
|
cblk->npasses = 0; |
|
} |
|
} |
|
} |
|
} |
|
return 0; |
|
} |
|
|
|
void ff_jpeg2000_cleanup(Jpeg2000Component *comp, Jpeg2000CodingStyle *codsty) |
|
{ |
|
int reslevelno, bandno, precno; |
|
for (reslevelno = 0; |
|
comp->reslevel && reslevelno < codsty->nreslevels; |
|
reslevelno++) { |
|
Jpeg2000ResLevel *reslevel = comp->reslevel + reslevelno; |
|
|
|
for (bandno = 0; bandno < reslevel->nbands; bandno++) { |
|
Jpeg2000Band *band = reslevel->band + bandno; |
|
for (precno = 0; precno < reslevel->num_precincts_x * reslevel->num_precincts_y; precno++) { |
|
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); |
|
}
|
|
|