305 lines
7.3 KiB
C
305 lines
7.3 KiB
C
/*
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* Copyright (c) 2002-2007, Communications and Remote Sensing Laboratory, Universite catholique de Louvain (UCL), Belgium
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* Copyright (c) 2002-2007, Professor Benoit Macq
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* Copyright (c) 2001-2003, David Janssens
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* Copyright (c) 2002-2003, Yannick Verschueren
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* Copyright (c) 2003-2007, Francois-Olivier Devaux and Antonin Descampe
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* Copyright (c) 2005, Herve Drolon, FreeImage Team
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* Copyright (c) 2008, Jerome Fimes, Communications & Systemes <jerome.fimes@c-s.fr>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS `AS IS'
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "mct.h"
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#include "fix.h"
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#include "opj_malloc.h"
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/* <summary> */
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/* This table contains the norms of the basis function of the reversible MCT. */
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/* </summary> */
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static const OPJ_FLOAT64 mct_norms[3] = { 1.732, .8292, .8292 };
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/* <summary> */
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/* This table contains the norms of the basis function of the irreversible MCT. */
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/* </summary> */
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static const OPJ_FLOAT64 mct_norms_real[3] = { 1.732, 1.805, 1.573 };
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const OPJ_FLOAT64 * get_mct_norms ()
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{
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return mct_norms;
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}
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const OPJ_FLOAT64 * get_mct_norms_real ()
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{
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return mct_norms_real;
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}
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/* <summary> */
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/* Foward reversible MCT. */
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/* </summary> */
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void mct_encode(
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OPJ_INT32* restrict c0,
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OPJ_INT32* restrict c1,
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OPJ_INT32* restrict c2,
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OPJ_UINT32 n)
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{
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OPJ_UINT32 i;
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for(i = 0; i < n; ++i) {
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OPJ_INT32 r = c0[i];
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OPJ_INT32 g = c1[i];
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OPJ_INT32 b = c2[i];
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OPJ_INT32 y = (r + (g * 2) + b) >> 2;
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OPJ_INT32 u = b - g;
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OPJ_INT32 v = r - g;
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c0[i] = y;
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c1[i] = u;
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c2[i] = v;
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}
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}
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/* <summary> */
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/* Inverse reversible MCT. */
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/* </summary> */
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void mct_decode(
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OPJ_INT32* restrict c0,
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OPJ_INT32* restrict c1,
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OPJ_INT32* restrict c2,
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OPJ_UINT32 n)
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{
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OPJ_UINT32 i;
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for (i = 0; i < n; ++i) {
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OPJ_INT32 y = c0[i];
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OPJ_INT32 u = c1[i];
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OPJ_INT32 v = c2[i];
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OPJ_INT32 g = y - ((u + v) >> 2);
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OPJ_INT32 r = v + g;
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OPJ_INT32 b = u + g;
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c0[i] = r;
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c1[i] = g;
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c2[i] = b;
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}
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}
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/* <summary> */
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/* Get norm of basis function of reversible MCT. */
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/* </summary> */
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OPJ_FLOAT64 mct_getnorm(OPJ_UINT32 compno) {
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return mct_norms[compno];
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}
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/* <summary> */
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/* Foward irreversible MCT. */
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/* </summary> */
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void mct_encode_real(
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OPJ_INT32* restrict c0,
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OPJ_INT32* restrict c1,
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OPJ_INT32* restrict c2,
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OPJ_UINT32 n)
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{
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OPJ_UINT32 i;
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for(i = 0; i < n; ++i) {
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OPJ_INT32 r = c0[i];
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OPJ_INT32 g = c1[i];
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OPJ_INT32 b = c2[i];
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OPJ_INT32 y = fix_mul(r, 2449) + fix_mul(g, 4809) + fix_mul(b, 934);
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OPJ_INT32 u = -fix_mul(r, 1382) - fix_mul(g, 2714) + fix_mul(b, 4096);
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OPJ_INT32 v = fix_mul(r, 4096) - fix_mul(g, 3430) - fix_mul(b, 666);
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c0[i] = y;
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c1[i] = u;
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c2[i] = v;
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}
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}
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/* <summary> */
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/* Inverse irreversible MCT. */
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/* </summary> */
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void mct_decode_real(
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OPJ_FLOAT32* restrict c0,
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OPJ_FLOAT32* restrict c1,
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OPJ_FLOAT32* restrict c2,
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OPJ_UINT32 n)
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{
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OPJ_UINT32 i;
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for(i = 0; i < n; ++i) {
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OPJ_FLOAT32 y = c0[i];
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OPJ_FLOAT32 u = c1[i];
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OPJ_FLOAT32 v = c2[i];
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OPJ_FLOAT32 r = y + (v * 1.402f);
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OPJ_FLOAT32 g = y - (u * 0.34413f) - (v * (0.71414f));
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OPJ_FLOAT32 b = y + (u * 1.772f);
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c0[i] = r;
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c1[i] = g;
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c2[i] = b;
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}
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}
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/* <summary> */
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/* Get norm of basis function of irreversible MCT. */
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/* </summary> */
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OPJ_FLOAT64 mct_getnorm_real(OPJ_UINT32 compno) {
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return mct_norms_real[compno];
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}
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bool mct_encode_custom(
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// MCT data
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OPJ_BYTE * pCodingdata,
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// size of components
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OPJ_UINT32 n,
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// components
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OPJ_BYTE ** pData,
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// nb of components (i.e. size of pData)
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OPJ_UINT32 pNbComp,
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// tells if the data is signed
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OPJ_UINT32 isSigned)
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{
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OPJ_FLOAT32 * lMct = (OPJ_FLOAT32 *) pCodingdata;
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OPJ_UINT32 i;
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OPJ_UINT32 j;
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OPJ_UINT32 k;
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OPJ_UINT32 lNbMatCoeff = pNbComp * pNbComp;
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OPJ_INT32 * lCurrentData = 00;
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OPJ_INT32 * lCurrentMatrix = 00;
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OPJ_INT32 ** lData = (OPJ_INT32 **) pData;
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OPJ_UINT32 lMultiplicator = 1 << 13;
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OPJ_INT32 * lMctPtr;
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lCurrentData = (OPJ_INT32 *) opj_malloc((pNbComp + lNbMatCoeff) * sizeof(OPJ_INT32));
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if
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(! lCurrentData)
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{
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return false;
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}
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lCurrentMatrix = lCurrentData + pNbComp;
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for
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(i =0;i<lNbMatCoeff;++i)
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{
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lCurrentMatrix[i] = (OPJ_INT32) (*(lMct++) * lMultiplicator);
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}
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for
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(i = 0; i < n; ++i)
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{
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lMctPtr = lCurrentMatrix;
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for
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(j=0;j<pNbComp;++j)
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{
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lCurrentData[j] = (*(lData[j]));
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}
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for
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(j=0;j<pNbComp;++j)
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{
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*(lData[j]) = 0;
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for
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(k=0;k<pNbComp;++k)
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{
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*(lData[j]) += fix_mul(*lMctPtr, lCurrentData[k]);
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++lMctPtr;
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}
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++lData[j];
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}
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}
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opj_free(lCurrentData);
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return true;
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}
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bool mct_decode_custom(
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// MCT data
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OPJ_BYTE * pDecodingData,
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// size of components
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OPJ_UINT32 n,
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// components
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OPJ_BYTE ** pData,
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// nb of components (i.e. size of pData)
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OPJ_UINT32 pNbComp,
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// tells if the data is signed
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OPJ_UINT32 isSigned)
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{
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OPJ_FLOAT32 * lMct;
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OPJ_UINT32 i;
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OPJ_UINT32 j;
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OPJ_UINT32 k;
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OPJ_FLOAT32 * lCurrentData = 00;
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OPJ_FLOAT32 * lCurrentResult = 00;
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OPJ_FLOAT32 ** lData = (OPJ_FLOAT32 **) pData;
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lCurrentData = (OPJ_FLOAT32 *) opj_malloc (2 * pNbComp * sizeof(OPJ_FLOAT32));
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if
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(! lCurrentData)
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{
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return false;
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}
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lCurrentResult = lCurrentData + pNbComp;
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for
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(i = 0; i < n; ++i)
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{
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lMct = (OPJ_FLOAT32 *) pDecodingData;
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for
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(j=0;j<pNbComp;++j)
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{
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lCurrentData[j] = (OPJ_FLOAT32) (*(lData[j]));
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}
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for
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(j=0;j<pNbComp;++j)
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{
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lCurrentResult[j] = 0;
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for
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(k=0;k<pNbComp;++k)
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{
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lCurrentResult[j] += *(lMct++) * lCurrentData[k];
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}
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*(lData[j]++) = (OPJ_FLOAT32) (lCurrentResult[j]);
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}
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}
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opj_free(lCurrentData);
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return true;
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}
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void opj_calculate_norms(OPJ_FLOAT64 * pNorms,OPJ_UINT32 pNbComps,OPJ_FLOAT32 * pMatrix)
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{
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OPJ_UINT32 i,j,lIndex;
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OPJ_FLOAT32 lCurrentValue;
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OPJ_FLOAT64 * lNorms = (OPJ_FLOAT64 *) pNorms;
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OPJ_FLOAT32 * lMatrix = (OPJ_FLOAT32 *) pMatrix;
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for
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(i=0;i<pNbComps;++i)
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{
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lNorms[i] = 0;
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lIndex = i;
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for
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(j=0;j<pNbComps;++j)
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{
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lCurrentValue = lMatrix[lIndex];
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lIndex += pNbComps;
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lNorms[i] += lCurrentValue * lCurrentValue;
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}
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lNorms[i] = sqrt(lNorms[i]);
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}
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}
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