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/*
* Copyright (C) 2012 Ronald S. Bultje
*
* 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
* Core video DSP helper functions
*/
#ifndef AVCODEC_VIDEODSP_H
#define AVCODEC_VIDEODSP_H
#include <stddef.h>
#include <stdint.h>
#define EMULATED_EDGE(depth) \
void ff_emulated_edge_mc_ ## depth(uint8_t *dst, const uint8_t *src, \
ptrdiff_t dst_stride, ptrdiff_t src_stride, \
int block_w, int block_h,\
int src_x, int src_y, int w, int h);
EMULATED_EDGE(8)
EMULATED_EDGE(16)
typedef struct VideoDSPContext {
/**
* Copy a rectangular area of samples to a temporary buffer and replicate
* the border samples.
*
* @param dst destination buffer
* @param dst_stride number of bytes between 2 vertically adjacent samples
* in destination buffer
* @param src source buffer
* @param dst_linesize number of bytes between 2 vertically adjacent
* samples in the destination buffer
* @param src_linesize number of bytes between 2 vertically adjacent
* samples in both the source buffer
* @param block_w width of block
* @param block_h height of block
* @param src_x x coordinate of the top left sample of the block in the
* source buffer
* @param src_y y coordinate of the top left sample of the block in the
* source buffer
* @param w width of the source buffer
* @param h height of the source buffer
*/
void (*emulated_edge_mc)(uint8_t *dst, const uint8_t *src,
ptrdiff_t dst_linesize,
ptrdiff_t src_linesize,
int block_w, int block_h,
int src_x, int src_y, int w, int h);
/**
* Prefetch memory into cache (if supported by hardware).
*
* @param buf pointer to buffer to prefetch memory from
* @param stride distance between two lines of buf (in bytes)
* @param h number of lines to prefetch
*/
void (*prefetch)(uint8_t *buf, ptrdiff_t stride, int h);
} VideoDSPContext;
void ff_videodsp_init(VideoDSPContext *ctx, int bpc);
/* for internal use only (i.e. called by ff_videodsp_init() */
void ff_videodsp_init_arm(VideoDSPContext *ctx, int bpc);
void ff_videodsp_init_ppc(VideoDSPContext *ctx, int bpc);
void ff_videodsp_init_x86(VideoDSPContext *ctx, int bpc);
#endif /* AVCODEC_VIDEODSP_H */
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