videodsp.h 3.26 KB
Newer Older
1 2 3
/*
 * Copyright (C) 2012 Ronald S. Bultje
 *
4
 * This file is part of FFmpeg.
5
 *
6
 * FFmpeg is free software; you can redistribute it and/or
7 8 9 10
 * 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.
 *
11
 * FFmpeg is distributed in the hope that it will be useful,
12 13 14 15 16
 * 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
17
 * License along with FFmpeg; if not, write to the Free Software
18 19 20 21 22 23 24 25 26 27 28 29 30 31
 * 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>

32
#define EMULATED_EDGE(depth) \
33 34
void ff_emulated_edge_mc_ ## depth(uint8_t *dst, const uint8_t *src, \
                                   ptrdiff_t dst_stride, ptrdiff_t src_stride, \
35 36
                                   int block_w, int block_h,\
                                   int src_x, int src_y, int w, int h);
37 38 39 40

EMULATED_EDGE(8)
EMULATED_EDGE(16)

41 42 43 44 45
typedef struct VideoDSPContext {
    /**
     * Copy a rectangular area of samples to a temporary buffer and replicate
     * the border samples.
     *
46 47 48
     * @param dst destination buffer
     * @param dst_stride number of bytes between 2 vertically adjacent samples
     *                   in destination buffer
49
     * @param src source buffer
50
     * @param dst_linesize number of bytes between 2 vertically adjacent
51 52 53
     *                     samples in the destination buffer
     * @param src_linesize number of bytes between 2 vertically adjacent
     *                     samples in both the source buffer
54 55 56 57 58 59 60 61 62
     * @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
     */
63 64
    void (*emulated_edge_mc)(uint8_t *dst, const uint8_t *src,
                             ptrdiff_t dst_linesize,
65
                             ptrdiff_t src_linesize,
66
                             int block_w, int block_h,
67 68 69 70 71
                             int src_x, int src_y, int w, int h);

    /**
     * Prefetch memory into cache (if supported by hardware).
     *
72 73 74
     * @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
75 76 77 78 79 80 81
     */
    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() */
82
void ff_videodsp_init_aarch64(VideoDSPContext *ctx, int bpc);
83 84 85 86 87
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 */