patch_idct.cpp File Reference

IDCT patch. More...

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

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Functions
void	set_group_of_patch_header (LLGroupHeader *gopp)
void	build_patch_dequantize_table (S32 size)
void	setup_patch_icosines (S32 size)
void	build_decopy_matrix (S32 size)
void	init_patch_decompressor (S32 size)
void	idct_line (F32 *linein, F32 *lineout, S32 line)
void	idct_line_large_slow (F32 *linein, F32 *lineout, S32 line)
void	idct_line_large (F32 *linein, F32 *lineout, S32 line)
void	idct_column (F32 *linein, F32 *lineout, S32 column)
void	idct_column_large_slow (F32 *linein, F32 *lineout, S32 column)
void	idct_column_large (F32 *linein, F32 *lineout, S32 column)
void	idct_patch (F32 *block)
void	idct_patch_large (F32 *block)
void	decompress_patch (F32 *patch, S32 *cpatch, LLPatchHeader *ph)
void	decompress_patchv (LLVector3 *v, S32 *cpatch, LLPatchHeader *ph)
Variables
LLGroupHeader *	gGOPP
F32	gPatchDequantizeTable [LARGE_PATCH_SIZE *LARGE_PATCH_SIZE]
S32	gCurrentDeSize = 0
F32	gPatchICosines [LARGE_PATCH_SIZE *LARGE_PATCH_SIZE]
S32	gDeCopyMatrix [LARGE_PATCH_SIZE *LARGE_PATCH_SIZE]
S32	gDitherNoise = 128

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Detailed Description

IDCT 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_idct.cpp.

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Function Documentation

void build_decopy_matrix

(

S32

size

)

Definition at line 79 of file patch_idct.cpp.

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

Referenced by init_patch_decompressor().

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void build_patch_dequantize_table

(

S32

size

)

Definition at line 47 of file patch_idct.cpp.

References gPatchDequantizeTable, i, j, and S32.

Referenced by init_patch_decompressor().

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void decompress_patch	(	F32 *	patch,
		S32 *	cpatch,
		LLPatchHeader *	ph
	)

Definition at line 596 of file patch_idct.cpp.

References LLPatchHeader::dc_offset, gDeCopyMatrix, gPatchDequantizeTable, i, idct_patch(), idct_patch_large(), j, LARGE_PATCH_SIZE, LLGroupHeader::patch_size, LLPatchHeader::quant_wbits, LLPatchHeader::range, S32, and LLGroupHeader::stride.

Referenced by LLWind::decompress(), LLCloudLayer::decompress(), and LLSurface::decompressDCTPatch().

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void decompress_patchv	(	LLVector3 *	v,
		S32 *	cpatch,
		LLPatchHeader *	ph
	)

Definition at line 644 of file patch_idct.cpp.

References LLPatchHeader::dc_offset, gDeCopyMatrix, gPatchDequantizeTable, i, idct_patch(), idct_patch_large(), j, LARGE_PATCH_SIZE, LLGroupHeader::patch_size, LLPatchHeader::quant_wbits, LLPatchHeader::range, S32, LLGroupHeader::stride, and VZ.

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

Definition at line 314 of file patch_idct.cpp.

References gPatchICosines, n, NORMAL_PATCH_SIZE, OO_SQRT2, LLGroupHeader::patch_size, and S32.

Referenced by idct_patch().

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void idct_column_large	(	F32 *	linein,
		F32 *	lineout,
		S32	column
	)

Definition at line 428 of file patch_idct.cpp.

References gPatchICosines, LARGE_PATCH_SIZE, n, NORMAL_PATCH_SIZE, OO_SQRT2, and S32.

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

Definition at line 369 of file patch_idct.cpp.

References gPatchICosines, LARGE_PATCH_SIZE, n, OO_SQRT2, and S32.

Referenced by idct_patch_large().

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void idct_line	(	F32 *	linein,
		F32 *	lineout,
		S32	line
	)			[inline]

Definition at line 154 of file patch_idct.cpp.

References gPatchICosines, n, NORMAL_PATCH_SIZE, OO_SQRT2, LLGroupHeader::patch_size, and S32.

Referenced by idct_patch().

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

Definition at line 272 of file patch_idct.cpp.

References gPatchICosines, LARGE_PATCH_SIZE, n, OO_SQRT2, and S32.

void idct_line_large_slow	(	F32 *	linein,
		F32 *	lineout,
		S32	line
	)			[inline]

Definition at line 210 of file patch_idct.cpp.

References gPatchICosines, LARGE_PATCH_SIZE, n, OO_SQRT2, and S32.

Referenced by idct_patch_large().

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void idct_patch

(

F32 *

block

)

[inline]

Definition at line 451 of file patch_idct.cpp.

References i, idct_column(), idct_line(), LARGE_PATCH_SIZE, LLGroupHeader::patch_size, and S32.

Referenced by decompress_patch(), and decompress_patchv().

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void idct_patch_large

(

F32 *

block

)

[inline]

Definition at line 509 of file patch_idct.cpp.

References idct_column_large_slow(), idct_line_large_slow(), and LARGE_PATCH_SIZE.

Referenced by decompress_patch(), and decompress_patchv().

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void init_patch_decompressor

(

S32

size

)

Definition at line 143 of file patch_idct.cpp.

References build_decopy_matrix(), build_patch_dequantize_table(), gCurrentDeSize, and setup_patch_icosines().

Referenced by LLWind::decompress(), LLCloudLayer::decompress(), and LLSurface::decompressDCTPatch().

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void set_group_of_patch_header

(

LLGroupHeader *

gopp

)

Definition at line 41 of file patch_idct.cpp.

Referenced by LLWind::decompress(), LLCloudLayer::decompress(), and LLSurface::decompressDCTPatch().

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void setup_patch_icosines

(

S32

size

)

Definition at line 63 of file patch_idct.cpp.

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

Referenced by init_patch_decompressor().

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Variable Documentation

S32 gCurrentDeSize = 0

Definition at line 59 of file patch_idct.cpp.

Referenced by init_patch_decompressor().

S32 gDeCopyMatrix[LARGE_PATCH_SIZE *LARGE_PATCH_SIZE]

Definition at line 77 of file patch_idct.cpp.

Referenced by build_decopy_matrix(), decompress_patch(), and decompress_patchv().

S32 gDitherNoise = 128

Definition at line 594 of file patch_idct.cpp.

LLGroupHeader* gGOPP

Definition at line 39 of file patch_idct.cpp.

F32 gPatchDequantizeTable[LARGE_PATCH_SIZE *LARGE_PATCH_SIZE]

Definition at line 46 of file patch_idct.cpp.

Referenced by build_patch_dequantize_table(), decompress_patch(), and decompress_patchv().

F32 gPatchICosines[LARGE_PATCH_SIZE *LARGE_PATCH_SIZE]

Definition at line 61 of file patch_idct.cpp.

Referenced by idct_column(), idct_column_large(), idct_column_large_slow(), idct_line(), idct_line_large(), idct_line_large_slow(), and setup_patch_icosines().