| /* |
| * Discrete wavelet transform |
| * 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 |
| * Discrete wavelet transform |
| */ |
| |
| #include "libavutil/avassert.h" |
| #include "libavutil/common.h" |
| #include "libavutil/mem.h" |
| #include "jpeg2000dwt.h" |
| #include "internal.h" |
| |
| /* Defines for 9/7 DWT lifting parameters. |
| * Parameters are in float. */ |
| #define F_LFTG_ALPHA 1.586134342059924f |
| #define F_LFTG_BETA 0.052980118572961f |
| #define F_LFTG_GAMMA 0.882911075530934f |
| #define F_LFTG_DELTA 0.443506852043971f |
| |
| /* Lifting parameters in integer format. |
| * Computed as param = (float param) * (1 << 16) */ |
| #define I_LFTG_ALPHA 103949ll |
| #define I_LFTG_BETA 3472ll |
| #define I_LFTG_GAMMA 57862ll |
| #define I_LFTG_DELTA 29066ll |
| #define I_LFTG_K 80621ll |
| #define I_LFTG_X 53274ll |
| #define I_PRESHIFT 8 |
| |
| static inline void extend53(int *p, int i0, int i1) |
| { |
| p[i0 - 1] = p[i0 + 1]; |
| p[i1] = p[i1 - 2]; |
| p[i0 - 2] = p[i0 + 2]; |
| p[i1 + 1] = p[i1 - 3]; |
| } |
| |
| static inline void extend97_float(float *p, int i0, int i1) |
| { |
| int i; |
| |
| for (i = 1; i <= 4; i++) { |
| p[i0 - i] = p[i0 + i]; |
| p[i1 + i - 1] = p[i1 - i - 1]; |
| } |
| } |
| |
| static inline void extend97_int(int32_t *p, int i0, int i1) |
| { |
| int i; |
| |
| for (i = 1; i <= 4; i++) { |
| p[i0 - i] = p[i0 + i]; |
| p[i1 + i - 1] = p[i1 - i - 1]; |
| } |
| } |
| |
| static void sd_1d53(int *p, int i0, int i1) |
| { |
| int i; |
| |
| if (i1 <= i0 + 1) { |
| if (i0 == 1) |
| p[1] <<= 1; |
| return; |
| } |
| |
| extend53(p, i0, i1); |
| |
| for (i = ((i0+1)>>1) - 1; i < (i1+1)>>1; i++) |
| p[2*i+1] -= (p[2*i] + p[2*i+2]) >> 1; |
| for (i = ((i0+1)>>1); i < (i1+1)>>1; i++) |
| p[2*i] += (p[2*i-1] + p[2*i+1] + 2) >> 2; |
| } |
| |
| static void dwt_encode53(DWTContext *s, int *t) |
| { |
| int lev, |
| w = s->linelen[s->ndeclevels-1][0]; |
| int *line = s->i_linebuf; |
| line += 3; |
| |
| for (lev = s->ndeclevels-1; lev >= 0; lev--){ |
| int lh = s->linelen[lev][0], |
| lv = s->linelen[lev][1], |
| mh = s->mod[lev][0], |
| mv = s->mod[lev][1], |
| lp; |
| int *l; |
| |
| // VER_SD |
| l = line + mv; |
| for (lp = 0; lp < lh; lp++) { |
| int i, j = 0; |
| |
| for (i = 0; i < lv; i++) |
| l[i] = t[w*i + lp]; |
| |
| sd_1d53(line, mv, mv + lv); |
| |
| // copy back and deinterleave |
| for (i = mv; i < lv; i+=2, j++) |
| t[w*j + lp] = l[i]; |
| for (i = 1-mv; i < lv; i+=2, j++) |
| t[w*j + lp] = l[i]; |
| } |
| |
| // HOR_SD |
| l = line + mh; |
| for (lp = 0; lp < lv; lp++){ |
| int i, j = 0; |
| |
| for (i = 0; i < lh; i++) |
| l[i] = t[w*lp + i]; |
| |
| sd_1d53(line, mh, mh + lh); |
| |
| // copy back and deinterleave |
| for (i = mh; i < lh; i+=2, j++) |
| t[w*lp + j] = l[i]; |
| for (i = 1-mh; i < lh; i+=2, j++) |
| t[w*lp + j] = l[i]; |
| } |
| } |
| } |
| static void sd_1d97_float(float *p, int i0, int i1) |
| { |
| int i; |
| |
| if (i1 <= i0 + 1) { |
| if (i0 == 1) |
| p[1] *= F_LFTG_X * 2; |
| else |
| p[0] *= F_LFTG_K; |
| return; |
| } |
| |
| extend97_float(p, i0, i1); |
| i0++; i1++; |
| |
| for (i = (i0>>1) - 2; i < (i1>>1) + 1; i++) |
| p[2*i+1] -= 1.586134 * (p[2*i] + p[2*i+2]); |
| for (i = (i0>>1) - 1; i < (i1>>1) + 1; i++) |
| p[2*i] -= 0.052980 * (p[2*i-1] + p[2*i+1]); |
| for (i = (i0>>1) - 1; i < (i1>>1); i++) |
| p[2*i+1] += 0.882911 * (p[2*i] + p[2*i+2]); |
| for (i = (i0>>1); i < (i1>>1); i++) |
| p[2*i] += 0.443506 * (p[2*i-1] + p[2*i+1]); |
| } |
| |
| static void dwt_encode97_float(DWTContext *s, float *t) |
| { |
| int lev, |
| w = s->linelen[s->ndeclevels-1][0]; |
| float *line = s->f_linebuf; |
| line += 5; |
| |
| for (lev = s->ndeclevels-1; lev >= 0; lev--){ |
| int lh = s->linelen[lev][0], |
| lv = s->linelen[lev][1], |
| mh = s->mod[lev][0], |
| mv = s->mod[lev][1], |
| lp; |
| float *l; |
| |
| // HOR_SD |
| l = line + mh; |
| for (lp = 0; lp < lv; lp++){ |
| int i, j = 0; |
| |
| for (i = 0; i < lh; i++) |
| l[i] = t[w*lp + i]; |
| |
| sd_1d97_float(line, mh, mh + lh); |
| |
| // copy back and deinterleave |
| for (i = mh; i < lh; i+=2, j++) |
| t[w*lp + j] = l[i]; |
| for (i = 1-mh; i < lh; i+=2, j++) |
| t[w*lp + j] = l[i]; |
| } |
| |
| // VER_SD |
| l = line + mv; |
| for (lp = 0; lp < lh; lp++) { |
| int i, j = 0; |
| |
| for (i = 0; i < lv; i++) |
| l[i] = t[w*i + lp]; |
| |
| sd_1d97_float(line, mv, mv + lv); |
| |
| // copy back and deinterleave |
| for (i = mv; i < lv; i+=2, j++) |
| t[w*j + lp] = l[i]; |
| for (i = 1-mv; i < lv; i+=2, j++) |
| t[w*j + lp] = l[i]; |
| } |
| } |
| } |
| |
| static void sd_1d97_int(int *p, int i0, int i1) |
| { |
| int i; |
| |
| if (i1 <= i0 + 1) { |
| if (i0 == 1) |
| p[1] = (p[1] * I_LFTG_X + (1<<14)) >> 15; |
| else |
| p[0] = (p[0] * I_LFTG_K + (1<<15)) >> 16; |
| return; |
| } |
| |
| extend97_int(p, i0, i1); |
| i0++; i1++; |
| |
| for (i = (i0>>1) - 2; i < (i1>>1) + 1; i++) |
| p[2 * i + 1] -= (I_LFTG_ALPHA * (p[2 * i] + p[2 * i + 2]) + (1 << 15)) >> 16; |
| for (i = (i0>>1) - 1; i < (i1>>1) + 1; i++) |
| p[2 * i] -= (I_LFTG_BETA * (p[2 * i - 1] + p[2 * i + 1]) + (1 << 15)) >> 16; |
| for (i = (i0>>1) - 1; i < (i1>>1); i++) |
| p[2 * i + 1] += (I_LFTG_GAMMA * (p[2 * i] + p[2 * i + 2]) + (1 << 15)) >> 16; |
| for (i = (i0>>1); i < (i1>>1); i++) |
| p[2 * i] += (I_LFTG_DELTA * (p[2 * i - 1] + p[2 * i + 1]) + (1 << 15)) >> 16; |
| } |
| |
| static void dwt_encode97_int(DWTContext *s, int *t) |
| { |
| int lev; |
| int w = s->linelen[s->ndeclevels-1][0]; |
| int h = s->linelen[s->ndeclevels-1][1]; |
| int i; |
| int *line = s->i_linebuf; |
| line += 5; |
| |
| for (i = 0; i < w * h; i++) |
| t[i] <<= I_PRESHIFT; |
| |
| for (lev = s->ndeclevels-1; lev >= 0; lev--){ |
| int lh = s->linelen[lev][0], |
| lv = s->linelen[lev][1], |
| mh = s->mod[lev][0], |
| mv = s->mod[lev][1], |
| lp; |
| int *l; |
| |
| // VER_SD |
| l = line + mv; |
| for (lp = 0; lp < lh; lp++) { |
| int i, j = 0; |
| |
| for (i = 0; i < lv; i++) |
| l[i] = t[w*i + lp]; |
| |
| sd_1d97_int(line, mv, mv + lv); |
| |
| // copy back and deinterleave |
| for (i = mv; i < lv; i+=2, j++) |
| t[w*j + lp] = ((l[i] * I_LFTG_X) + (1 << 15)) >> 16; |
| for (i = 1-mv; i < lv; i+=2, j++) |
| t[w*j + lp] = l[i]; |
| } |
| |
| // HOR_SD |
| l = line + mh; |
| for (lp = 0; lp < lv; lp++){ |
| int i, j = 0; |
| |
| for (i = 0; i < lh; i++) |
| l[i] = t[w*lp + i]; |
| |
| sd_1d97_int(line, mh, mh + lh); |
| |
| // copy back and deinterleave |
| for (i = mh; i < lh; i+=2, j++) |
| t[w*lp + j] = ((l[i] * I_LFTG_X) + (1 << 15)) >> 16; |
| for (i = 1-mh; i < lh; i+=2, j++) |
| t[w*lp + j] = l[i]; |
| } |
| |
| } |
| |
| for (i = 0; i < w * h; i++) |
| t[i] = (t[i] + ((1<<I_PRESHIFT)>>1)) >> I_PRESHIFT; |
| } |
| |
| static void sr_1d53(unsigned *p, int i0, int i1) |
| { |
| int i; |
| |
| if (i1 <= i0 + 1) { |
| if (i0 == 1) |
| p[1] = (int)p[1] >> 1; |
| return; |
| } |
| |
| extend53(p, i0, i1); |
| |
| for (i = (i0 >> 1); i < (i1 >> 1) + 1; i++) |
| p[2 * i] -= (int)(p[2 * i - 1] + p[2 * i + 1] + 2) >> 2; |
| for (i = (i0 >> 1); i < (i1 >> 1); i++) |
| p[2 * i + 1] += (int)(p[2 * i] + p[2 * i + 2]) >> 1; |
| } |
| |
| static void dwt_decode53(DWTContext *s, int *t) |
| { |
| int lev; |
| int w = s->linelen[s->ndeclevels - 1][0]; |
| int32_t *line = s->i_linebuf; |
| line += 3; |
| |
| for (lev = 0; lev < s->ndeclevels; lev++) { |
| int lh = s->linelen[lev][0], |
| lv = s->linelen[lev][1], |
| mh = s->mod[lev][0], |
| mv = s->mod[lev][1], |
| lp; |
| int *l; |
| |
| // HOR_SD |
| l = line + mh; |
| for (lp = 0; lp < lv; lp++) { |
| int i, j = 0; |
| // copy with interleaving |
| for (i = mh; i < lh; i += 2, j++) |
| l[i] = t[w * lp + j]; |
| for (i = 1 - mh; i < lh; i += 2, j++) |
| l[i] = t[w * lp + j]; |
| |
| sr_1d53(line, mh, mh + lh); |
| |
| for (i = 0; i < lh; i++) |
| t[w * lp + i] = l[i]; |
| } |
| |
| // VER_SD |
| l = line + mv; |
| for (lp = 0; lp < lh; lp++) { |
| int i, j = 0; |
| // copy with interleaving |
| for (i = mv; i < lv; i += 2, j++) |
| l[i] = t[w * j + lp]; |
| for (i = 1 - mv; i < lv; i += 2, j++) |
| l[i] = t[w * j + lp]; |
| |
| sr_1d53(line, mv, mv + lv); |
| |
| for (i = 0; i < lv; i++) |
| t[w * i + lp] = l[i]; |
| } |
| } |
| } |
| |
| static void sr_1d97_float(float *p, int i0, int i1) |
| { |
| int i; |
| |
| if (i1 <= i0 + 1) { |
| if (i0 == 1) |
| p[1] *= F_LFTG_K/2; |
| else |
| p[0] *= F_LFTG_X; |
| return; |
| } |
| |
| extend97_float(p, i0, i1); |
| |
| for (i = (i0 >> 1) - 1; i < (i1 >> 1) + 2; i++) |
| p[2 * i] -= F_LFTG_DELTA * (p[2 * i - 1] + p[2 * i + 1]); |
| /* step 4 */ |
| for (i = (i0 >> 1) - 1; i < (i1 >> 1) + 1; i++) |
| p[2 * i + 1] -= F_LFTG_GAMMA * (p[2 * i] + p[2 * i + 2]); |
| /*step 5*/ |
| for (i = (i0 >> 1); i < (i1 >> 1) + 1; i++) |
| p[2 * i] += F_LFTG_BETA * (p[2 * i - 1] + p[2 * i + 1]); |
| /* step 6 */ |
| for (i = (i0 >> 1); i < (i1 >> 1); i++) |
| p[2 * i + 1] += F_LFTG_ALPHA * (p[2 * i] + p[2 * i + 2]); |
| } |
| |
| static void dwt_decode97_float(DWTContext *s, float *t) |
| { |
| int lev; |
| int w = s->linelen[s->ndeclevels - 1][0]; |
| float *line = s->f_linebuf; |
| float *data = t; |
| /* position at index O of line range [0-5,w+5] cf. extend function */ |
| line += 5; |
| |
| for (lev = 0; lev < s->ndeclevels; lev++) { |
| int lh = s->linelen[lev][0], |
| lv = s->linelen[lev][1], |
| mh = s->mod[lev][0], |
| mv = s->mod[lev][1], |
| lp; |
| float *l; |
| // HOR_SD |
| l = line + mh; |
| for (lp = 0; lp < lv; lp++) { |
| int i, j = 0; |
| // copy with interleaving |
| for (i = mh; i < lh; i += 2, j++) |
| l[i] = data[w * lp + j]; |
| for (i = 1 - mh; i < lh; i += 2, j++) |
| l[i] = data[w * lp + j]; |
| |
| sr_1d97_float(line, mh, mh + lh); |
| |
| for (i = 0; i < lh; i++) |
| data[w * lp + i] = l[i]; |
| } |
| |
| // VER_SD |
| l = line + mv; |
| for (lp = 0; lp < lh; lp++) { |
| int i, j = 0; |
| // copy with interleaving |
| for (i = mv; i < lv; i += 2, j++) |
| l[i] = data[w * j + lp]; |
| for (i = 1 - mv; i < lv; i += 2, j++) |
| l[i] = data[w * j + lp]; |
| |
| sr_1d97_float(line, mv, mv + lv); |
| |
| for (i = 0; i < lv; i++) |
| data[w * i + lp] = l[i]; |
| } |
| } |
| } |
| |
| static void sr_1d97_int(int32_t *p, int i0, int i1) |
| { |
| int i; |
| |
| if (i1 <= i0 + 1) { |
| if (i0 == 1) |
| p[1] = (p[1] * I_LFTG_K + (1<<16)) >> 17; |
| else |
| p[0] = (p[0] * I_LFTG_X + (1<<15)) >> 16; |
| return; |
| } |
| |
| extend97_int(p, i0, i1); |
| |
| for (i = (i0 >> 1) - 1; i < (i1 >> 1) + 2; i++) |
| p[2 * i] -= (I_LFTG_DELTA * (p[2 * i - 1] + (int64_t)p[2 * i + 1]) + (1 << 15)) >> 16; |
| /* step 4 */ |
| for (i = (i0 >> 1) - 1; i < (i1 >> 1) + 1; i++) |
| p[2 * i + 1] -= (I_LFTG_GAMMA * (p[2 * i] + (int64_t)p[2 * i + 2]) + (1 << 15)) >> 16; |
| /*step 5*/ |
| for (i = (i0 >> 1); i < (i1 >> 1) + 1; i++) |
| p[2 * i] += (I_LFTG_BETA * (p[2 * i - 1] + (int64_t)p[2 * i + 1]) + (1 << 15)) >> 16; |
| /* step 6 */ |
| for (i = (i0 >> 1); i < (i1 >> 1); i++) |
| p[2 * i + 1] += (I_LFTG_ALPHA * (p[2 * i] + (int64_t)p[2 * i + 2]) + (1 << 15)) >> 16; |
| } |
| |
| static void dwt_decode97_int(DWTContext *s, int32_t *t) |
| { |
| int lev; |
| int w = s->linelen[s->ndeclevels - 1][0]; |
| int h = s->linelen[s->ndeclevels - 1][1]; |
| int i; |
| int32_t *line = s->i_linebuf; |
| int32_t *data = t; |
| /* position at index O of line range [0-5,w+5] cf. extend function */ |
| line += 5; |
| |
| for (i = 0; i < w * h; i++) |
| data[i] *= 1LL << I_PRESHIFT; |
| |
| for (lev = 0; lev < s->ndeclevels; lev++) { |
| int lh = s->linelen[lev][0], |
| lv = s->linelen[lev][1], |
| mh = s->mod[lev][0], |
| mv = s->mod[lev][1], |
| lp; |
| int32_t *l; |
| // HOR_SD |
| l = line + mh; |
| for (lp = 0; lp < lv; lp++) { |
| int i, j = 0; |
| // rescale with interleaving |
| for (i = mh; i < lh; i += 2, j++) |
| l[i] = ((data[w * lp + j] * I_LFTG_K) + (1 << 15)) >> 16; |
| for (i = 1 - mh; i < lh; i += 2, j++) |
| l[i] = data[w * lp + j]; |
| |
| sr_1d97_int(line, mh, mh + lh); |
| |
| for (i = 0; i < lh; i++) |
| data[w * lp + i] = l[i]; |
| } |
| |
| // VER_SD |
| l = line + mv; |
| for (lp = 0; lp < lh; lp++) { |
| int i, j = 0; |
| // rescale with interleaving |
| for (i = mv; i < lv; i += 2, j++) |
| l[i] = ((data[w * j + lp] * I_LFTG_K) + (1 << 15)) >> 16; |
| for (i = 1 - mv; i < lv; i += 2, j++) |
| l[i] = data[w * j + lp]; |
| |
| sr_1d97_int(line, mv, mv + lv); |
| |
| for (i = 0; i < lv; i++) |
| data[w * i + lp] = l[i]; |
| } |
| } |
| |
| for (i = 0; i < w * h; i++) |
| data[i] = (data[i] + ((1<<I_PRESHIFT)>>1)) >> I_PRESHIFT; |
| } |
| |
| int ff_jpeg2000_dwt_init(DWTContext *s, int border[2][2], |
| int decomp_levels, int type) |
| { |
| int i, j, lev = decomp_levels, maxlen, |
| b[2][2]; |
| |
| s->ndeclevels = decomp_levels; |
| s->type = type; |
| |
| for (i = 0; i < 2; i++) |
| for (j = 0; j < 2; j++) |
| b[i][j] = border[i][j]; |
| |
| maxlen = FFMAX(b[0][1] - b[0][0], |
| b[1][1] - b[1][0]); |
| while (--lev >= 0) |
| for (i = 0; i < 2; i++) { |
| s->linelen[lev][i] = b[i][1] - b[i][0]; |
| s->mod[lev][i] = b[i][0] & 1; |
| for (j = 0; j < 2; j++) |
| b[i][j] = (b[i][j] + 1) >> 1; |
| } |
| switch (type) { |
| case FF_DWT97: |
| s->f_linebuf = av_malloc_array((maxlen + 12), sizeof(*s->f_linebuf)); |
| if (!s->f_linebuf) |
| return AVERROR(ENOMEM); |
| break; |
| case FF_DWT97_INT: |
| s->i_linebuf = av_malloc_array((maxlen + 12), sizeof(*s->i_linebuf)); |
| if (!s->i_linebuf) |
| return AVERROR(ENOMEM); |
| break; |
| case FF_DWT53: |
| s->i_linebuf = av_malloc_array((maxlen + 6), sizeof(*s->i_linebuf)); |
| if (!s->i_linebuf) |
| return AVERROR(ENOMEM); |
| break; |
| default: |
| return -1; |
| } |
| return 0; |
| } |
| |
| int ff_dwt_encode(DWTContext *s, void *t) |
| { |
| if (s->ndeclevels == 0) |
| return 0; |
| |
| switch(s->type){ |
| case FF_DWT97: |
| dwt_encode97_float(s, t); break; |
| case FF_DWT97_INT: |
| dwt_encode97_int(s, t); break; |
| case FF_DWT53: |
| dwt_encode53(s, t); break; |
| default: |
| return -1; |
| } |
| return 0; |
| } |
| |
| int ff_dwt_decode(DWTContext *s, void *t) |
| { |
| if (s->ndeclevels == 0) |
| return 0; |
| |
| switch (s->type) { |
| case FF_DWT97: |
| dwt_decode97_float(s, t); |
| break; |
| case FF_DWT97_INT: |
| dwt_decode97_int(s, t); |
| break; |
| case FF_DWT53: |
| dwt_decode53(s, t); |
| break; |
| default: |
| return -1; |
| } |
| return 0; |
| } |
| |
| void ff_dwt_destroy(DWTContext *s) |
| { |
| av_freep(&s->f_linebuf); |
| av_freep(&s->i_linebuf); |
| } |
