patch_dct.cpp
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上传日期:2021-03-01
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- /**
- * @file patch_dct.cpp
- * @brief DCT patch.
- *
- * $LicenseInfo:firstyear=2000&license=viewergpl$
- *
- * Copyright (c) 2000-2010, Linden Research, Inc.
- *
- * Second Life Viewer Source Code
- * The source code in this file ("Source Code") is provided by Linden Lab
- * to you under the terms of the GNU General Public License, version 2.0
- * ("GPL"), unless you have obtained a separate licensing agreement
- * ("Other License"), formally executed by you and Linden Lab. Terms of
- * the GPL can be found in doc/GPL-license.txt in this distribution, or
- * online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
- *
- * There are special exceptions to the terms and conditions of the GPL as
- * it is applied to this Source Code. View the full text of the exception
- * in the file doc/FLOSS-exception.txt in this software distribution, or
- * online at
- * http://secondlifegrid.net/programs/open_source/licensing/flossexception
- *
- * By copying, modifying or distributing this software, you acknowledge
- * that you have read and understood your obligations described above,
- * and agree to abide by those obligations.
- *
- * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
- * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
- * COMPLETENESS OR PERFORMANCE.
- * $/LicenseInfo$
- */
- #include "linden_common.h"
- #include "llmath.h"
- //#include "vmath.h"
- #include "v3math.h"
- #include "patch_dct.h"
- typedef struct s_patch_compress_global_data
- {
- S32 patch_size;
- S32 patch_stride;
- U32 charptr;
- S32 layer_type;
- } PCGD;
- PCGD gPatchCompressGlobalData;
- void reset_patch_compressor(void)
- {
- PCGD *pcp = &gPatchCompressGlobalData;
- pcp->charptr = 0;
- }
- S32 gCurrentSize = 0;
- F32 gPatchQuantizeTable[LARGE_PATCH_SIZE*LARGE_PATCH_SIZE];
- void build_patch_quantize_table(S32 size)
- {
- S32 i, j;
- for (j = 0; j < size; j++)
- {
- for (i = 0; i < size; i++)
- {
- gPatchQuantizeTable[j*size + i] = 1.f/(1.f + 2.f*(i+j));
- }
- }
- }
- F32 gPatchCosines[LARGE_PATCH_SIZE*LARGE_PATCH_SIZE];
- void setup_patch_cosines(S32 size)
- {
- S32 n, u;
- F32 oosob = F_PI*0.5f/size;
- for (u = 0; u < size; u++)
- {
- for (n = 0; n < size; n++)
- {
- gPatchCosines[u*size+n] = cosf((2.f*n+1.f)*u*oosob);
- }
- }
- }
- S32 gCopyMatrix[LARGE_PATCH_SIZE*LARGE_PATCH_SIZE];
- void build_copy_matrix(S32 size)
- {
- S32 i, j, count;
- BOOL b_diag = FALSE;
- BOOL b_right = TRUE;
- i = 0;
- j = 0;
- count = 0;
- while ( (i < size)
- &&(j < size))
- {
- gCopyMatrix[j*size + i] = count;
- count++;
- if (!b_diag)
- {
- if (b_right)
- {
- if (i < size - 1)
- i++;
- else
- j++;
- b_right = FALSE;
- b_diag = TRUE;
- }
- else
- {
- if (j < size - 1)
- j++;
- else
- i++;
- b_right = TRUE;
- b_diag = TRUE;
- }
- }
- else
- {
- if (b_right)
- {
- i++;
- j--;
- if ( (i == size - 1)
- ||(j == 0))
- {
- b_diag = FALSE;
- }
- }
- else
- {
- i--;
- j++;
- if ( (i == 0)
- ||(j == size - 1))
- {
- b_diag = FALSE;
- }
- }
- }
- }
- }
- void init_patch_compressor(S32 patch_size, S32 patch_stride, S32 layer_type)
- {
- PCGD *pcp = &gPatchCompressGlobalData;
- pcp->charptr = 0;
- pcp->patch_size = patch_size;
- pcp->patch_stride = patch_stride;
- pcp->layer_type = layer_type;
- if (patch_size != gCurrentSize)
- {
- gCurrentSize = patch_size;
- build_patch_quantize_table(patch_size);
- setup_patch_cosines(patch_size);
- build_copy_matrix(patch_size);
- }
- }
- void prescan_patch(F32 *patch, LLPatchHeader *php, F32 &zmax, F32 &zmin)
- {
- S32 i, j;
- PCGD *pcp = &gPatchCompressGlobalData;
- S32 stride = pcp->patch_stride;
- S32 size = pcp->patch_size;
- S32 jstride;
- zmax = -99999999.f;
- zmin = 99999999.f;
- for (j = 0; j < size; j++)
- {
- jstride = j*stride;
- for (i = 0; i < size; i++)
- {
- if (*(patch + jstride + i) > zmax)
- {
- zmax = *(patch + jstride + i);
- }
- if (*(patch + jstride + i) < zmin)
- {
- zmin = *(patch + jstride + i);
- }
- }
- }
- php->dc_offset = zmin;
- php->range = (U16) ((zmax - zmin) + 1.f);
- }
- void dct_line(F32 *linein, F32 *lineout, S32 line)
- {
- S32 u;
- F32 total;
- F32 *pcp = gPatchCosines;
- S32 line_size = line*NORMAL_PATCH_SIZE;
- #ifdef _PATCH_SIZE_16_AND_32_ONLY
- F32 *tlinein, *tpcp;
- tlinein = linein + line_size;
- total = *(tlinein++);
- total += *(tlinein++);
- total += *(tlinein++);
- total += *(tlinein++);
- total += *(tlinein++);
- total += *(tlinein++);
- total += *(tlinein++);
- total += *(tlinein++);
- total += *(tlinein++);
- total += *(tlinein++);
- total += *(tlinein++);
- total += *(tlinein++);
- total += *(tlinein++);
- total += *(tlinein++);
- total += *(tlinein++);
- total += *(tlinein);
- *(lineout + line_size) = OO_SQRT2*total;
- for (u = 1; u < NORMAL_PATCH_SIZE; u++)
- {
- tlinein = linein + line_size;
- tpcp = pcp + (u<<4);
- total = *(tlinein++)*(*(tpcp++));
- total += *(tlinein++)*(*(tpcp++));
- total += *(tlinein++)*(*(tpcp++));
- total += *(tlinein++)*(*(tpcp++));
- total += *(tlinein++)*(*(tpcp++));
- total += *(tlinein++)*(*(tpcp++));
- total += *(tlinein++)*(*(tpcp++));
- total += *(tlinein++)*(*(tpcp++));
- total += *(tlinein++)*(*(tpcp++));
- total += *(tlinein++)*(*(tpcp++));
- total += *(tlinein++)*(*(tpcp++));
- total += *(tlinein++)*(*(tpcp++));
- total += *(tlinein++)*(*(tpcp++));
- total += *(tlinein++)*(*(tpcp++));
- total += *(tlinein++)*(*(tpcp++));
- total += *(tlinein)*(*tpcp);
- *(lineout + line_size + u) = total;
- }
- #else
- S32 n;
- S32 size = gPatchCompressGlobalData.patch_size;
- total = 0.f;
- for (n = 0; n < size; n++)
- {
- total += linein[line_size + n];
- }
- lineout[line_size] = OO_SQRT2*total;
- for (u = 1; u < size; u++)
- {
- total = 0.f;
- for (n = 0; n < size; n++)
- {
- total += linein[line_size + n]*pcp[u*size+n];
- }
- lineout[line_size + u] = total;
- }
- #endif
- }
- void dct_line_large(F32 *linein, F32 *lineout, S32 line)
- {
- S32 u;
- F32 total;
- F32 *pcp = gPatchCosines;
- S32 line_size = line*LARGE_PATCH_SIZE;
- F32 *tlinein, *tpcp;
- tlinein = linein + line_size;
- total = *(tlinein++);
- total += *(tlinein++);
- total += *(tlinein++);
- total += *(tlinein++);
- total += *(tlinein++);
- total += *(tlinein++);
- total += *(tlinein++);
- total += *(tlinein++);
- total += *(tlinein++);
- total += *(tlinein++);
- total += *(tlinein++);
- total += *(tlinein++);
- total += *(tlinein++);
- total += *(tlinein++);
- total += *(tlinein++);
- total += *(tlinein++);
- total += *(tlinein++);
- total += *(tlinein++);
- total += *(tlinein++);
- total += *(tlinein++);
- total += *(tlinein++);
- total += *(tlinein++);
- total += *(tlinein++);
- total += *(tlinein++);
- total += *(tlinein++);
- total += *(tlinein++);
- total += *(tlinein++);
- total += *(tlinein++);
- total += *(tlinein++);
- total += *(tlinein++);
- total += *(tlinein++);
- total += *(tlinein);
- *(lineout + line_size) = OO_SQRT2*total;
- for (u = 1; u < LARGE_PATCH_SIZE; u++)
- {
- tlinein = linein + line_size;
- tpcp = pcp + (u<<5);
- total = *(tlinein++)*(*(tpcp++));
- total += *(tlinein++)*(*(tpcp++));
- total += *(tlinein++)*(*(tpcp++));
- total += *(tlinein++)*(*(tpcp++));
- total += *(tlinein++)*(*(tpcp++));
- total += *(tlinein++)*(*(tpcp++));
- total += *(tlinein++)*(*(tpcp++));
- total += *(tlinein++)*(*(tpcp++));
- total += *(tlinein++)*(*(tpcp++));
- total += *(tlinein++)*(*(tpcp++));
- total += *(tlinein++)*(*(tpcp++));
- total += *(tlinein++)*(*(tpcp++));
- total += *(tlinein++)*(*(tpcp++));
- total += *(tlinein++)*(*(tpcp++));
- total += *(tlinein++)*(*(tpcp++));
- total += *(tlinein++)*(*(tpcp++));
- total += *(tlinein++)*(*(tpcp++));
- total += *(tlinein++)*(*(tpcp++));
- total += *(tlinein++)*(*(tpcp++));
- total += *(tlinein++)*(*(tpcp++));
- total += *(tlinein++)*(*(tpcp++));
- total += *(tlinein++)*(*(tpcp++));
- total += *(tlinein++)*(*(tpcp++));
- total += *(tlinein++)*(*(tpcp++));
- total += *(tlinein++)*(*(tpcp++));
- total += *(tlinein++)*(*(tpcp++));
- total += *(tlinein++)*(*(tpcp++));
- total += *(tlinein++)*(*(tpcp++));
- total += *(tlinein++)*(*(tpcp++));
- total += *(tlinein++)*(*(tpcp++));
- total += *(tlinein++)*(*(tpcp++));
- total += *(tlinein)*(*tpcp);
- *(lineout + line_size + u) = total;
- }
- }
- inline void dct_column(F32 *linein, S32 *lineout, S32 column)
- {
- S32 u;
- F32 total;
- F32 oosob = 2.f/16.f;
- F32 *pcp = gPatchCosines;
- S32 *copy_matrix = gCopyMatrix;
- F32 *qt = gPatchQuantizeTable;
- #ifdef _PATCH_SIZE_16_AND_32_ONLY
- F32 *tlinein, *tpcp;
- S32 sizeu;
- tlinein = linein + column;
- total = *(tlinein);
- total += *(tlinein += NORMAL_PATCH_SIZE);
- total += *(tlinein += NORMAL_PATCH_SIZE);
- total += *(tlinein += NORMAL_PATCH_SIZE);
- total += *(tlinein += NORMAL_PATCH_SIZE);
- total += *(tlinein += NORMAL_PATCH_SIZE);
- total += *(tlinein += NORMAL_PATCH_SIZE);
- total += *(tlinein += NORMAL_PATCH_SIZE);
- total += *(tlinein += NORMAL_PATCH_SIZE);
- total += *(tlinein += NORMAL_PATCH_SIZE);
- total += *(tlinein += NORMAL_PATCH_SIZE);
- total += *(tlinein += NORMAL_PATCH_SIZE);
- total += *(tlinein += NORMAL_PATCH_SIZE);
- total += *(tlinein += NORMAL_PATCH_SIZE);
- total += *(tlinein += NORMAL_PATCH_SIZE);
- total += *(tlinein += NORMAL_PATCH_SIZE);
- *(lineout + *(copy_matrix + column)) = (S32)(OO_SQRT2*total*oosob*(*(qt + column)));
- for (u = 1; u < NORMAL_PATCH_SIZE; u++)
- {
- tlinein = linein + column;
- tpcp = pcp + (u<<4);
- total = *(tlinein)*(*(tpcp++));
- total += *(tlinein += NORMAL_PATCH_SIZE)*(*(tpcp++));
- total += *(tlinein += NORMAL_PATCH_SIZE)*(*(tpcp++));
- total += *(tlinein += NORMAL_PATCH_SIZE)*(*(tpcp++));
- total += *(tlinein += NORMAL_PATCH_SIZE)*(*(tpcp++));
- total += *(tlinein += NORMAL_PATCH_SIZE)*(*(tpcp++));
- total += *(tlinein += NORMAL_PATCH_SIZE)*(*(tpcp++));
- total += *(tlinein += NORMAL_PATCH_SIZE)*(*(tpcp++));
- total += *(tlinein += NORMAL_PATCH_SIZE)*(*(tpcp++));
- total += *(tlinein += NORMAL_PATCH_SIZE)*(*(tpcp++));
- total += *(tlinein += NORMAL_PATCH_SIZE)*(*(tpcp++));
- total += *(tlinein += NORMAL_PATCH_SIZE)*(*(tpcp++));
- total += *(tlinein += NORMAL_PATCH_SIZE)*(*(tpcp++));
- total += *(tlinein += NORMAL_PATCH_SIZE)*(*(tpcp++));
- total += *(tlinein += NORMAL_PATCH_SIZE)*(*(tpcp++));
- total += *(tlinein += NORMAL_PATCH_SIZE)*(*(tpcp));
- sizeu = NORMAL_PATCH_SIZE*u + column;
- *(lineout + *(copy_matrix + sizeu)) = (S32)(total*oosob*(*(qt+sizeu)));
- }
- #else
- S32 size = gPatchCompressGlobalData.patch_size;
- F32 oosob = 2.f/size;
- S32 n;
- total = 0.f;
- for (n = 0; n < size; n++)
- {
- total += linein[size*n + column];
- }
- lineout[copy_matrix[column]] = OO_SQRT2*total*oosob*qt[column];
- for (u = 1; u < size; u++)
- {
- total = 0.f;
- for (n = 0; n < size; n++)
- {
- total += linein[size*n + column]*pcp[u*size+n];
- }
- lineout[copy_matrix[size*u + column]] = total*oosob*qt[size*u + column];
- }
- #endif
- }
- inline void dct_column_large(F32 *linein, S32 *lineout, S32 column)
- {
- S32 u;
- F32 total;
- F32 oosob = 2.f/32.f;
- F32 *pcp = gPatchCosines;
- S32 *copy_matrix = gCopyMatrix;
- F32 *qt = gPatchQuantizeTable;
- F32 *tlinein, *tpcp;
- S32 sizeu;
- tlinein = linein + column;
- total = *(tlinein);
- total += *(tlinein += LARGE_PATCH_SIZE);
- total += *(tlinein += LARGE_PATCH_SIZE);
- total += *(tlinein += LARGE_PATCH_SIZE);
- total += *(tlinein += LARGE_PATCH_SIZE);
- total += *(tlinein += LARGE_PATCH_SIZE);
- total += *(tlinein += LARGE_PATCH_SIZE);
- total += *(tlinein += LARGE_PATCH_SIZE);
- total += *(tlinein += LARGE_PATCH_SIZE);
- total += *(tlinein += LARGE_PATCH_SIZE);
- total += *(tlinein += LARGE_PATCH_SIZE);
- total += *(tlinein += LARGE_PATCH_SIZE);
- total += *(tlinein += LARGE_PATCH_SIZE);
- total += *(tlinein += LARGE_PATCH_SIZE);
- total += *(tlinein += LARGE_PATCH_SIZE);
- total += *(tlinein += LARGE_PATCH_SIZE);
- total += *(tlinein += LARGE_PATCH_SIZE);
- total += *(tlinein += LARGE_PATCH_SIZE);
- total += *(tlinein += LARGE_PATCH_SIZE);
- total += *(tlinein += LARGE_PATCH_SIZE);
- total += *(tlinein += LARGE_PATCH_SIZE);
- total += *(tlinein += LARGE_PATCH_SIZE);
- total += *(tlinein += LARGE_PATCH_SIZE);
- total += *(tlinein += LARGE_PATCH_SIZE);
- total += *(tlinein += LARGE_PATCH_SIZE);
- total += *(tlinein += LARGE_PATCH_SIZE);
- total += *(tlinein += LARGE_PATCH_SIZE);
- total += *(tlinein += LARGE_PATCH_SIZE);
- total += *(tlinein += LARGE_PATCH_SIZE);
- total += *(tlinein += LARGE_PATCH_SIZE);
- total += *(tlinein += LARGE_PATCH_SIZE);
- total += *(tlinein += LARGE_PATCH_SIZE);
- *(lineout + *(copy_matrix + column)) = (S32)(OO_SQRT2*total*oosob*(*(qt + column)));
- for (u = 1; u < LARGE_PATCH_SIZE; u++)
- {
- tlinein = linein + column;
- tpcp = pcp + (u<<5);
- total = *(tlinein)*(*(tpcp++));
- total += *(tlinein += LARGE_PATCH_SIZE)*(*(tpcp++));
- total += *(tlinein += LARGE_PATCH_SIZE)*(*(tpcp++));
- total += *(tlinein += LARGE_PATCH_SIZE)*(*(tpcp++));
- total += *(tlinein += LARGE_PATCH_SIZE)*(*(tpcp++));
- total += *(tlinein += LARGE_PATCH_SIZE)*(*(tpcp++));
- total += *(tlinein += LARGE_PATCH_SIZE)*(*(tpcp++));
- total += *(tlinein += LARGE_PATCH_SIZE)*(*(tpcp++));
- total += *(tlinein += LARGE_PATCH_SIZE)*(*(tpcp++));
- total += *(tlinein += LARGE_PATCH_SIZE)*(*(tpcp++));
- total += *(tlinein += LARGE_PATCH_SIZE)*(*(tpcp++));
- total += *(tlinein += LARGE_PATCH_SIZE)*(*(tpcp++));
- total += *(tlinein += LARGE_PATCH_SIZE)*(*(tpcp++));
- total += *(tlinein += LARGE_PATCH_SIZE)*(*(tpcp++));
- total += *(tlinein += LARGE_PATCH_SIZE)*(*(tpcp++));
- total += *(tlinein += LARGE_PATCH_SIZE)*(*(tpcp++));
- total += *(tlinein += LARGE_PATCH_SIZE)*(*(tpcp++));
- total += *(tlinein += LARGE_PATCH_SIZE)*(*(tpcp++));
- total += *(tlinein += LARGE_PATCH_SIZE)*(*(tpcp++));
- total += *(tlinein += LARGE_PATCH_SIZE)*(*(tpcp++));
- total += *(tlinein += LARGE_PATCH_SIZE)*(*(tpcp++));
- total += *(tlinein += LARGE_PATCH_SIZE)*(*(tpcp++));
- total += *(tlinein += LARGE_PATCH_SIZE)*(*(tpcp++));
- total += *(tlinein += LARGE_PATCH_SIZE)*(*(tpcp++));
- total += *(tlinein += LARGE_PATCH_SIZE)*(*(tpcp++));
- total += *(tlinein += LARGE_PATCH_SIZE)*(*(tpcp++));
- total += *(tlinein += LARGE_PATCH_SIZE)*(*(tpcp++));
- total += *(tlinein += LARGE_PATCH_SIZE)*(*(tpcp++));
- total += *(tlinein += LARGE_PATCH_SIZE)*(*(tpcp++));
- total += *(tlinein += LARGE_PATCH_SIZE)*(*(tpcp++));
- total += *(tlinein += LARGE_PATCH_SIZE)*(*(tpcp++));
- total += *(tlinein += LARGE_PATCH_SIZE)*(*(tpcp));
- sizeu = LARGE_PATCH_SIZE*u + column;
- *(lineout + *(copy_matrix + sizeu)) = (S32)(total*oosob*(*(qt+sizeu)));
- }
- }
- inline void dct_patch(F32 *block, S32 *cpatch)
- {
- F32 temp[NORMAL_PATCH_SIZE*NORMAL_PATCH_SIZE];
- #ifdef _PATCH_SIZE_16_AND_32_ONLY
- dct_line(block, temp, 0);
- dct_line(block, temp, 1);
- dct_line(block, temp, 2);
- dct_line(block, temp, 3);
- dct_line(block, temp, 4);
- dct_line(block, temp, 5);
- dct_line(block, temp, 6);
- dct_line(block, temp, 7);
- dct_line(block, temp, 8);
- dct_line(block, temp, 9);
- dct_line(block, temp, 10);
- dct_line(block, temp, 11);
- dct_line(block, temp, 12);
- dct_line(block, temp, 13);
- dct_line(block, temp, 14);
- dct_line(block, temp, 15);
- dct_column(temp, cpatch, 0);
- dct_column(temp, cpatch, 1);
- dct_column(temp, cpatch, 2);
- dct_column(temp, cpatch, 3);
- dct_column(temp, cpatch, 4);
- dct_column(temp, cpatch, 5);
- dct_column(temp, cpatch, 6);
- dct_column(temp, cpatch, 7);
- dct_column(temp, cpatch, 8);
- dct_column(temp, cpatch, 9);
- dct_column(temp, cpatch, 10);
- dct_column(temp, cpatch, 11);
- dct_column(temp, cpatch, 12);
- dct_column(temp, cpatch, 13);
- dct_column(temp, cpatch, 14);
- dct_column(temp, cpatch, 15);
- #else
- S32 i;
- S32 size = gPatchCompressGlobalData.patch_size;
- for (i = 0; i < size; i++)
- {
- dct_line(block, temp, i);
- }
- for (i = 0; i < size; i++)
- {
- dct_column(temp, cpatch, i);
- }
- #endif
- }
- inline void dct_patch_large(F32 *block, S32 *cpatch)
- {
- F32 temp[LARGE_PATCH_SIZE*LARGE_PATCH_SIZE];
- dct_line_large(block, temp, 0);
- dct_line_large(block, temp, 1);
- dct_line_large(block, temp, 2);
- dct_line_large(block, temp, 3);
- dct_line_large(block, temp, 4);
- dct_line_large(block, temp, 5);
- dct_line_large(block, temp, 6);
- dct_line_large(block, temp, 7);
- dct_line_large(block, temp, 8);
- dct_line_large(block, temp, 9);
- dct_line_large(block, temp, 10);
- dct_line_large(block, temp, 11);
- dct_line_large(block, temp, 12);
- dct_line_large(block, temp, 13);
- dct_line_large(block, temp, 14);
- dct_line_large(block, temp, 15);
- dct_line_large(block, temp, 16);
- dct_line_large(block, temp, 17);
- dct_line_large(block, temp, 18);
- dct_line_large(block, temp, 19);
- dct_line_large(block, temp, 20);
- dct_line_large(block, temp, 21);
- dct_line_large(block, temp, 22);
- dct_line_large(block, temp, 23);
- dct_line_large(block, temp, 24);
- dct_line_large(block, temp, 25);
- dct_line_large(block, temp, 26);
- dct_line_large(block, temp, 27);
- dct_line_large(block, temp, 28);
- dct_line_large(block, temp, 29);
- dct_line_large(block, temp, 30);
- dct_line_large(block, temp, 31);
- dct_column_large(temp, cpatch, 0);
- dct_column_large(temp, cpatch, 1);
- dct_column_large(temp, cpatch, 2);
- dct_column_large(temp, cpatch, 3);
- dct_column_large(temp, cpatch, 4);
- dct_column_large(temp, cpatch, 5);
- dct_column_large(temp, cpatch, 6);
- dct_column_large(temp, cpatch, 7);
- dct_column_large(temp, cpatch, 8);
- dct_column_large(temp, cpatch, 9);
- dct_column_large(temp, cpatch, 10);
- dct_column_large(temp, cpatch, 11);
- dct_column_large(temp, cpatch, 12);
- dct_column_large(temp, cpatch, 13);
- dct_column_large(temp, cpatch, 14);
- dct_column_large(temp, cpatch, 15);
- dct_column_large(temp, cpatch, 16);
- dct_column_large(temp, cpatch, 17);
- dct_column_large(temp, cpatch, 18);
- dct_column_large(temp, cpatch, 19);
- dct_column_large(temp, cpatch, 20);
- dct_column_large(temp, cpatch, 21);
- dct_column_large(temp, cpatch, 22);
- dct_column_large(temp, cpatch, 23);
- dct_column_large(temp, cpatch, 24);
- dct_column_large(temp, cpatch, 25);
- dct_column_large(temp, cpatch, 26);
- dct_column_large(temp, cpatch, 27);
- dct_column_large(temp, cpatch, 28);
- dct_column_large(temp, cpatch, 29);
- dct_column_large(temp, cpatch, 30);
- dct_column_large(temp, cpatch, 31);
- }
- void compress_patch(F32 *patch, S32 *cpatch, LLPatchHeader *php, S32 prequant)
- {
- S32 i, j;
- PCGD *pcp = &gPatchCompressGlobalData;
- S32 stride = pcp->patch_stride;
- S32 size = pcp->patch_size;
- F32 block[LARGE_PATCH_SIZE*LARGE_PATCH_SIZE], *tblock;
- F32 *tpatch;
- S32 wordsize = prequant;
- F32 oozrange = 1.f/php->range;
- F32 dc = php->dc_offset;
- S32 range = (1<<prequant);
- F32 premult = oozrange*range;
- // F32 sub = (F32)(1<<(prequant - 1));
- F32 sub = (F32)(1<<(prequant - 1)) + dc*premult;
- php->quant_wbits = wordsize - 2;
- php->quant_wbits |= (prequant - 2)<<4;
- for (j = 0; j < size; j++)
- {
- tblock = block + j*size;
- tpatch = patch + j*stride;
- for (i = 0; i < size; i++)
- {
- // block[j*size + i] = (patch[j*stride + i] - dc)*premult - sub;
- *(tblock++) = *(tpatch++)*premult - sub;
- }
- }
- if (size == 16)
- dct_patch(block, cpatch);
- else
- dct_patch_large(block, cpatch);
- }
- void get_patch_group_header(LLGroupHeader *gopp)
- {
- PCGD *pcp = &gPatchCompressGlobalData;
- gopp->stride = pcp->patch_stride;
- gopp->patch_size = pcp->patch_size;
- gopp->layer_type = pcp->layer_type;
- }