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/src/FreeImage/Source/LibOpenJPEG/mct.c

https://bitbucket.org/cabalistic/ogredeps/
C | 190 lines | 124 code | 12 blank | 54 comment | 5 complexity | e33ad74d31e5e599631603b9f047cca4 MD5 | raw file
  1/*
  2 * Copyright (c) 2002-2007, Communications and Remote Sensing Laboratory, Universite catholique de Louvain (UCL), Belgium
  3 * Copyright (c) 2002-2007, Professor Benoit Macq
  4 * Copyright (c) 2001-2003, David Janssens
  5 * Copyright (c) 2002-2003, Yannick Verschueren
  6 * Copyright (c) 2003-2007, Francois-Olivier Devaux and Antonin Descampe
  7 * Copyright (c) 2005, Herve Drolon, FreeImage Team
  8 * All rights reserved.
  9 *
 10 * Redistribution and use in source and binary forms, with or without
 11 * modification, are permitted provided that the following conditions
 12 * are met:
 13 * 1. Redistributions of source code must retain the above copyright
 14 *    notice, this list of conditions and the following disclaimer.
 15 * 2. Redistributions in binary form must reproduce the above copyright
 16 *    notice, this list of conditions and the following disclaimer in the
 17 *    documentation and/or other materials provided with the distribution.
 18 *
 19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS `AS IS'
 20 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 22 * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 23 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 29 * POSSIBILITY OF SUCH DAMAGE.
 30 */
 31
 32#ifdef __SSE__
 33#include <xmmintrin.h>
 34#endif
 35
 36#include "opj_includes.h"
 37
 38/* <summary> */
 39/* This table contains the norms of the basis function of the reversible MCT. */
 40/* </summary> */
 41static const double mct_norms[3] = { 1.732, .8292, .8292 };
 42
 43/* <summary> */
 44/* This table contains the norms of the basis function of the irreversible MCT. */
 45/* </summary> */
 46static const double mct_norms_real[3] = { 1.732, 1.805, 1.573 };
 47
 48/* <summary> */
 49/* Foward reversible MCT. */
 50/* </summary> */
 51void mct_encode(
 52		int* restrict c0,
 53		int* restrict c1,
 54		int* restrict c2,
 55		int n)
 56{
 57	int i;
 58	for(i = 0; i < n; ++i) {
 59		int r = c0[i];
 60		int g = c1[i];
 61		int b = c2[i];
 62		int y = (r + (g * 2) + b) >> 2;
 63		int u = b - g;
 64		int v = r - g;
 65		c0[i] = y;
 66		c1[i] = u;
 67		c2[i] = v;
 68	}
 69}
 70
 71/* <summary> */
 72/* Inverse reversible MCT. */
 73/* </summary> */
 74void mct_decode(
 75		int* restrict c0,
 76		int* restrict c1, 
 77		int* restrict c2, 
 78		int n)
 79{
 80	int i;
 81	for (i = 0; i < n; ++i) {
 82		int y = c0[i];
 83		int u = c1[i];
 84		int v = c2[i];
 85		int g = y - ((u + v) >> 2);
 86		int r = v + g;
 87		int b = u + g;
 88		c0[i] = r;
 89		c1[i] = g;
 90		c2[i] = b;
 91	}
 92}
 93
 94/* <summary> */
 95/* Get norm of basis function of reversible MCT. */
 96/* </summary> */
 97double mct_getnorm(int compno) {
 98	return mct_norms[compno];
 99}
100
101/* <summary> */
102/* Foward irreversible MCT. */
103/* </summary> */
104void mct_encode_real(
105		int* restrict c0,
106		int* restrict c1,
107		int* restrict c2,
108		int n)
109{
110	int i;
111	for(i = 0; i < n; ++i) {
112		int r = c0[i];
113		int g = c1[i];
114		int b = c2[i];
115		int y =  fix_mul(r, 2449) + fix_mul(g, 4809) + fix_mul(b, 934);
116		int u = -fix_mul(r, 1382) - fix_mul(g, 2714) + fix_mul(b, 4096);
117		int v =  fix_mul(r, 4096) - fix_mul(g, 3430) - fix_mul(b, 666);
118		c0[i] = y;
119		c1[i] = u;
120		c2[i] = v;
121	}
122}
123
124/* <summary> */
125/* Inverse irreversible MCT. */
126/* </summary> */
127void mct_decode_real(
128		float* restrict c0,
129		float* restrict c1,
130		float* restrict c2,
131		int n)
132{
133	int i;
134#ifdef __SSE__
135	__m128 vrv, vgu, vgv, vbu;
136	vrv = _mm_set1_ps(1.402f);
137	vgu = _mm_set1_ps(0.34413f);
138	vgv = _mm_set1_ps(0.71414f);
139	vbu = _mm_set1_ps(1.772f);
140	for (i = 0; i < (n >> 3); ++i) {
141		__m128 vy, vu, vv;
142		__m128 vr, vg, vb;
143
144		vy = _mm_load_ps(c0);
145		vu = _mm_load_ps(c1);
146		vv = _mm_load_ps(c2);
147		vr = _mm_add_ps(vy, _mm_mul_ps(vv, vrv));
148		vg = _mm_sub_ps(_mm_sub_ps(vy, _mm_mul_ps(vu, vgu)), _mm_mul_ps(vv, vgv));
149		vb = _mm_add_ps(vy, _mm_mul_ps(vu, vbu));
150		_mm_store_ps(c0, vr);
151		_mm_store_ps(c1, vg);
152		_mm_store_ps(c2, vb);
153		c0 += 4;
154		c1 += 4;
155		c2 += 4;
156
157		vy = _mm_load_ps(c0);
158		vu = _mm_load_ps(c1);
159		vv = _mm_load_ps(c2);
160		vr = _mm_add_ps(vy, _mm_mul_ps(vv, vrv));
161		vg = _mm_sub_ps(_mm_sub_ps(vy, _mm_mul_ps(vu, vgu)), _mm_mul_ps(vv, vgv));
162		vb = _mm_add_ps(vy, _mm_mul_ps(vu, vbu));
163		_mm_store_ps(c0, vr);
164		_mm_store_ps(c1, vg);
165		_mm_store_ps(c2, vb);
166		c0 += 4;
167		c1 += 4;
168		c2 += 4;
169	}
170	n &= 7;
171#endif
172	for(i = 0; i < n; ++i) {
173		float y = c0[i];
174		float u = c1[i];
175		float v = c2[i];
176		float r = y + (v * 1.402f);
177		float g = y - (u * 0.34413f) - (v * (0.71414f));
178		float b = y + (u * 1.772f);
179		c0[i] = r;
180		c1[i] = g;
181		c2[i] = b;
182	}
183}
184
185/* <summary> */
186/* Get norm of basis function of irreversible MCT. */
187/* </summary> */
188double mct_getnorm_real(int compno) {
189	return mct_norms_real[compno];
190}