0,0 → 1,104 |
/* |
* Half-pel DSP functions. |
* Copyright (c) 2000, 2001, 2002 Fabrice Bellard |
* Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at> |
* |
* This file is part of FFmpeg. |
* |
* FFmpeg is free software; you can redistribute it and/or |
* modify it under the terms of the GNU Lesser General Public |
* License as published by the Free Software Foundation; either |
* version 2.1 of the License, or (at your option) any later version. |
* |
* FFmpeg is distributed in the hope that it will be useful, |
* but WITHOUT ANY WARRANTY; without even the implied warranty of |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
* Lesser General Public License for more details. |
* |
* You should have received a copy of the GNU Lesser General Public |
* License along with FFmpeg; if not, write to the Free Software |
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
*/ |
|
/** |
* @file |
* Half-pel DSP functions. |
*/ |
|
#ifndef AVCODEC_HPELDSP_H |
#define AVCODEC_HPELDSP_H |
|
#include <stdint.h> |
#include <stddef.h> |
|
/* add and put pixel (decoding) */ |
// blocksizes for hpel_pixels_func are 8x4,8x8 16x8 16x16 |
// h for hpel_pixels_func is limited to {width/2, width} but never larger |
// than 16 and never smaller than 4 |
typedef void (*op_pixels_func)(uint8_t *block /*align width (8 or 16)*/, |
const uint8_t *pixels /*align 1*/, |
ptrdiff_t line_size, int h); |
|
/** |
* Half-pel DSP context. |
*/ |
typedef struct HpelDSPContext { |
/** |
* Halfpel motion compensation with rounding (a+b+1)>>1. |
* this is an array[4][4] of motion compensation functions for 4 |
* horizontal blocksizes (8,16) and the 4 halfpel positions<br> |
* *pixels_tab[ 0->16xH 1->8xH ][ xhalfpel + 2*yhalfpel ] |
* @param block destination where the result is stored |
* @param pixels source |
* @param line_size number of bytes in a horizontal line of block |
* @param h height |
*/ |
op_pixels_func put_pixels_tab[4][4]; |
|
/** |
* Halfpel motion compensation with rounding (a+b+1)>>1. |
* This is an array[4][4] of motion compensation functions for 4 |
* horizontal blocksizes (8,16) and the 4 halfpel positions<br> |
* *pixels_tab[ 0->16xH 1->8xH ][ xhalfpel + 2*yhalfpel ] |
* @param block destination into which the result is averaged (a+b+1)>>1 |
* @param pixels source |
* @param line_size number of bytes in a horizontal line of block |
* @param h height |
*/ |
op_pixels_func avg_pixels_tab[4][4]; |
|
/** |
* Halfpel motion compensation with no rounding (a+b)>>1. |
* this is an array[4][4] of motion compensation functions for 2 |
* horizontal blocksizes (8,16) and the 4 halfpel positions<br> |
* *pixels_tab[ 0->16xH 1->8xH ][ xhalfpel + 2*yhalfpel ] |
* @param block destination where the result is stored |
* @param pixels source |
* @param line_size number of bytes in a horizontal line of block |
* @param h height |
*/ |
op_pixels_func put_no_rnd_pixels_tab[4][4]; |
|
/** |
* Halfpel motion compensation with no rounding (a+b)>>1. |
* this is an array[4] of motion compensation functions for 1 |
* horizontal blocksize (16) and the 4 halfpel positions<br> |
* *pixels_tab[0][ xhalfpel + 2*yhalfpel ] |
* @param block destination into which the result is averaged (a+b)>>1 |
* @param pixels source |
* @param line_size number of bytes in a horizontal line of block |
* @param h height |
*/ |
op_pixels_func avg_no_rnd_pixels_tab[4]; |
} HpelDSPContext; |
|
void ff_hpeldsp_init(HpelDSPContext *c, int flags); |
|
void ff_hpeldsp_init_alpha(HpelDSPContext *c, int flags); |
void ff_hpeldsp_init_arm(HpelDSPContext *c, int flags); |
void ff_hpeldsp_init_bfin(HpelDSPContext *c, int flags); |
void ff_hpeldsp_init_ppc(HpelDSPContext *c, int flags); |
void ff_hpeldsp_init_vis(HpelDSPContext *c, int flags); |
void ff_hpeldsp_init_x86(HpelDSPContext *c, int flags); |
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#endif /* AVCODEC_HPELDSP_H */ |