patch_dct.cpp File Reference

DCT patch. More...

#include "linden_common.h"
#include "llmath.h"
#include "v3math.h"
#include "patch_dct.h"

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Classes
struct	s_patch_compress_global_data
Typedefs
typedef struct s_patch_compress_global_data	PCGD
Functions
void	reset_patch_compressor (void)
void	build_patch_quantize_table (S32 size)
void	setup_patch_cosines (S32 size)
void	build_copy_matrix (S32 size)
void	init_patch_compressor (S32 patch_size, S32 patch_stride, S32 layer_type)
void	prescan_patch (F32 *patch, LLPatchHeader *php, F32 &zmax, F32 &zmin)
void	dct_line (F32 *linein, F32 *lineout, S32 line)
void	dct_line_large (F32 *linein, F32 *lineout, S32 line)
void	dct_column (F32 *linein, S32 *lineout, S32 column)
void	dct_column_large (F32 *linein, S32 *lineout, S32 column)
void	dct_patch (F32 *block, S32 *cpatch)
void	dct_patch_large (F32 *block, S32 *cpatch)
void	compress_patch (F32 *patch, S32 *cpatch, LLPatchHeader *php, S32 prequant)
void	get_patch_group_header (LLGroupHeader *gopp)
Variables
PCGD	gPatchCompressGlobalData
S32	gCurrentSize = 0
F32	gPatchQuantizeTable [LARGE_PATCH_SIZE *LARGE_PATCH_SIZE]
F32	gPatchCosines [LARGE_PATCH_SIZE *LARGE_PATCH_SIZE]
S32	gCopyMatrix [LARGE_PATCH_SIZE *LARGE_PATCH_SIZE]

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Detailed Description

DCT patch.

LicenseInfo

firstyear=2000&license=viewergpl

Copyright (c) 2000-2008, 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. $/LicenseInfo$

Definition in file patch_dct.cpp.

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Typedef Documentation

typedef struct s_patch_compress_global_data PCGD

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Function Documentation

void build_copy_matrix

(

S32

size

)

Definition at line 90 of file patch_dct.cpp.

References FALSE, gCopyMatrix, i, j, S32, and TRUE.

Referenced by init_patch_compressor().

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void build_patch_quantize_table

(

S32

size

)

Definition at line 60 of file patch_dct.cpp.

References gPatchQuantizeTable, i, j, and S32.

Referenced by init_patch_compressor().

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void compress_patch	(	F32 *	patch,
		S32 *	cpatch,
		LLPatchHeader *	php,
		S32	prequant
	)

Definition at line 729 of file patch_dct.cpp.

References LLPatchHeader::dc_offset, dct_patch(), dct_patch_large(), i, j, LARGE_PATCH_SIZE, s_patch_compress_global_data::patch_size, s_patch_compress_global_data::patch_stride, LLPatchHeader::quant_wbits, LLPatchHeader::range, and S32.

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void dct_column	(	F32 *	linein,
		S32 *	lineout,
		S32	column
	)			[inline]

Definition at line 390 of file patch_dct.cpp.

References gCopyMatrix, gPatchCosines, gPatchQuantizeTable, n, NORMAL_PATCH_SIZE, OO_SQRT2, s_patch_compress_global_data::patch_size, and S32.

Referenced by dct_patch().

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void dct_column_large	(	F32 *	linein,
		S32 *	lineout,
		S32	column
	)			[inline]

Definition at line 479 of file patch_dct.cpp.

References gCopyMatrix, gPatchCosines, gPatchQuantizeTable, LARGE_PATCH_SIZE, OO_SQRT2, and S32.

Referenced by dct_patch_large().

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void dct_line	(	F32 *	linein,
		F32 *	lineout,
		S32	line
	)

Definition at line 205 of file patch_dct.cpp.

References gPatchCosines, n, NORMAL_PATCH_SIZE, OO_SQRT2, s_patch_compress_global_data::patch_size, and S32.

Referenced by dct_patch().

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void dct_line_large	(	F32 *	linein,
		F32 *	lineout,
		S32	line
	)

Definition at line 288 of file patch_dct.cpp.

References gPatchCosines, LARGE_PATCH_SIZE, OO_SQRT2, and S32.

Referenced by dct_patch_large().

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void dct_patch	(	F32 *	block,
		S32 *	cpatch
	)			[inline]

Definition at line 586 of file patch_dct.cpp.

References dct_column(), dct_line(), i, NORMAL_PATCH_SIZE, s_patch_compress_global_data::patch_size, and S32.

Referenced by compress_patch().

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void dct_patch_large	(	F32 *	block,
		S32 *	cpatch
	)			[inline]

Definition at line 644 of file patch_dct.cpp.

References dct_column_large(), dct_line_large(), and LARGE_PATCH_SIZE.

Referenced by compress_patch().

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void get_patch_group_header

(

LLGroupHeader *

gopp

)

Definition at line 768 of file patch_dct.cpp.

References s_patch_compress_global_data::layer_type, LLGroupHeader::layer_type, s_patch_compress_global_data::patch_size, LLGroupHeader::patch_size, s_patch_compress_global_data::patch_stride, and LLGroupHeader::stride.

void init_patch_compressor	(	S32	patch_size,
		S32	patch_stride,
		S32	layer_type
	)

Definition at line 155 of file patch_dct.cpp.

References build_copy_matrix(), build_patch_quantize_table(), s_patch_compress_global_data::charptr, gCurrentSize, s_patch_compress_global_data::layer_type, s_patch_compress_global_data::patch_size, s_patch_compress_global_data::patch_stride, and setup_patch_cosines().

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void prescan_patch	(	F32 *	patch,
		LLPatchHeader *	php,
		F32 &	zmax,
		F32 &	zmin
	)

Definition at line 174 of file patch_dct.cpp.

References LLPatchHeader::dc_offset, i, j, s_patch_compress_global_data::patch_size, s_patch_compress_global_data::patch_stride, LLPatchHeader::range, and S32.

void reset_patch_compressor

(

void

)

Definition at line 49 of file patch_dct.cpp.

References s_patch_compress_global_data::charptr.

void setup_patch_cosines

(

S32

size

)

Definition at line 74 of file patch_dct.cpp.

References cosf, F_PI, gPatchCosines, n, and S32.

Referenced by init_patch_compressor().

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Variable Documentation

S32 gCopyMatrix[LARGE_PATCH_SIZE *LARGE_PATCH_SIZE]

Definition at line 88 of file patch_dct.cpp.

Referenced by build_copy_matrix(), dct_column(), and dct_column_large().

S32 gCurrentSize = 0

Definition at line 56 of file patch_dct.cpp.

Referenced by init_patch_compressor().

PCGD gPatchCompressGlobalData

Definition at line 47 of file patch_dct.cpp.

F32 gPatchCosines[LARGE_PATCH_SIZE *LARGE_PATCH_SIZE]

Definition at line 72 of file patch_dct.cpp.

Referenced by dct_column(), dct_column_large(), dct_line(), dct_line_large(), and setup_patch_cosines().

F32 gPatchQuantizeTable[LARGE_PATCH_SIZE *LARGE_PATCH_SIZE]

Definition at line 58 of file patch_dct.cpp.

Referenced by build_patch_quantize_table(), dct_column(), and dct_column_large().