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Diffstat (limited to 'media/libstagefright/codecs/m4v_h263/dec/src/idct.h')
| -rw-r--r-- | media/libstagefright/codecs/m4v_h263/dec/src/idct.h | 118 |
1 files changed, 118 insertions, 0 deletions
diff --git a/media/libstagefright/codecs/m4v_h263/dec/src/idct.h b/media/libstagefright/codecs/m4v_h263/dec/src/idct.h new file mode 100644 index 0000000..8edb654 --- /dev/null +++ b/media/libstagefright/codecs/m4v_h263/dec/src/idct.h @@ -0,0 +1,118 @@ +/* ------------------------------------------------------------------ + * Copyright (C) 1998-2009 PacketVideo + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either + * express or implied. + * See the License for the specific language governing permissions + * and limitations under the License. + * ------------------------------------------------------------------- + */ +#ifndef idct_h +#define idct_h + +/*---------------------------------------------------------------------------- +; INCLUDES +----------------------------------------------------------------------------*/ +#include "mp4dec_lib.h" + +/*---------------------------------------------------------------------------- +; MACROS +; Define module specific macros here +----------------------------------------------------------------------------*/ + +/*---------------------------------------------------------------------------- +; DEFINES +; Include all pre-processor statements here. +----------------------------------------------------------------------------*/ +#define INTEGER_IDCT + +#ifdef FAST_IDCT +#ifndef INTEGER_IDCT +#define INTEGER_IDCT +#endif +#endif + +#ifdef FAST_IDCT +#ifdef __cplusplus +extern "C" +{ +#endif + void idctrow0(int16 *blk, uint8 *pred, uint8 *dst, int width); + void idctrow1(int16 *blk, uint8 *pred, uint8 *dst, int width); + void idctrow2(int16 *blk, uint8 *pred, uint8 *dst, int width); + void idctrow3(int16 *blk, uint8 *pred, uint8 *dst, int width); + void idctrow4(int16 *blk, uint8 *pred, uint8 *dst, int width); + void idctcol0(int16 *blk); + void idctcol1(int16 *blk); + void idctcol2(int16 *blk); + void idctcol3(int16 *blk); + void idctcol4(int16 *blk); + + void idctrow0_intra(int16 *blk, PIXEL *comp, int width); + void idctrow1_intra(int16 *blk, PIXEL *comp, int width); + void idctrow2_intra(int16 *blk, PIXEL *comp, int width); + void idctrow3_intra(int16 *blk, PIXEL *comp, int width); + void idctrow4_intra(int16 *blk, PIXEL *comp, int width); +#ifdef __cplusplus +} +#endif +#endif + +/* this code assumes ">>" to be a two's-complement arithmetic */ +/* right shift: (-2)>>1 == -1 , (-3)>>1 == -2 */ + +/* a positive real constant is converted to an integer scaled by 2048 */ +/* or equivalent to left shift by 11 */ + +#define W1 2841 /* 2048*sqrt(2)*cos(1*pi/16) */ +#define W2 2676 /* 2048*sqrt(2)*cos(2*pi/16) */ +#define W3 2408 /* 2048*sqrt(2)*cos(3*pi/16) */ +#define W5 1609 /* 2048*sqrt(2)*cos(5*pi/16) */ +#define W6 1108 /* 2048*sqrt(2)*cos(6*pi/16) */ +#define W7 565 /* 2048*sqrt(2)*cos(7*pi/16) */ +#define W1mW7 2276 +#define W1pW7 3406 +#define W5mW3 -799 +#define mW3mW5 -4017 +#define mW2mW6 -3784 +#define W2mW6 1568 + +/* left shift by 11 is to maintain the accuracy of the decimal point */ +/* for the transform coefficients (W1,...W7) */ + +/*---------------------------------------------------------------------------- +; EXTERNAL VARIABLES REFERENCES +; Declare variables used in this module but defined elsewhere +----------------------------------------------------------------------------*/ + +/*---------------------------------------------------------------------------- +; SIMPLE TYPEDEF'S +----------------------------------------------------------------------------*/ + +/*---------------------------------------------------------------------------- +; ENUMERATED TYPEDEF'S +----------------------------------------------------------------------------*/ + +/*---------------------------------------------------------------------------- +; STRUCTURES TYPEDEF'S +----------------------------------------------------------------------------*/ + +/*---------------------------------------------------------------------------- +; GLOBAL FUNCTION DEFINITIONS +; Function Prototype declaration +----------------------------------------------------------------------------*/ + +/*---------------------------------------------------------------------------- +; END +----------------------------------------------------------------------------*/ +#endif + + |