107 lines
4.0 KiB
C
Executable File
107 lines
4.0 KiB
C
Executable File
/*
|
|
* 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
|
|
* @note The size is kept at [4][4] to match the above pixel_tabs and avoid
|
|
* out of bounds reads in the motion estimation code.
|
|
*/
|
|
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_aarch64(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_ppc(HpelDSPContext *c, int flags);
|
|
void ff_hpeldsp_init_x86(HpelDSPContext *c, int flags);
|
|
void ff_hpeldsp_init_mips(HpelDSPContext *c, int flags);
|
|
|
|
#endif /* AVCODEC_HPELDSP_H */
|