1 /* 2 * Copyright (C) 2012 Ronald S. Bultje 3 * 4 * This file is part of FFmpeg. 5 * 6 * FFmpeg is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU Lesser General Public 8 * License as published by the Free Software Foundation; either 9 * version 2.1 of the License, or (at your option) any later version. 10 * 11 * FFmpeg is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 * Lesser General Public License for more details. 15 * 16 * 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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 19 */ 20 21 /** 22 * @file 23 * Core video DSP helper functions 24 */ 25 26 #ifndef AVCODEC_VIDEODSP_H 27 #define AVCODEC_VIDEODSP_H 28 29 #include <stddef.h> 30 #include <stdint.h> 31 32 #define EMULATED_EDGE(depth) \ 33 void ff_emulated_edge_mc_ ## depth(uint8_t *dst, const uint8_t *src, \ 34 ptrdiff_t dst_stride, ptrdiff_t src_stride, \ 35 int block_w, int block_h,\ 36 int src_x, int src_y, int w, int h); 37 38 EMULATED_EDGE(8) 39 EMULATED_EDGE(16) 40 41 typedef struct VideoDSPContext { 42 /** 43 * Copy a rectangular area of samples to a temporary buffer and replicate 44 * the border samples. 45 * 46 * @param dst destination buffer 47 * @param dst_stride number of bytes between 2 vertically adjacent samples 48 * in destination buffer 49 * @param src source buffer 50 * @param dst_linesize number of bytes between 2 vertically adjacent 51 * samples in the destination buffer 52 * @param src_linesize number of bytes between 2 vertically adjacent 53 * samples in both the source buffer 54 * @param block_w width of block 55 * @param block_h height of block 56 * @param src_x x coordinate of the top left sample of the block in the 57 * source buffer 58 * @param src_y y coordinate of the top left sample of the block in the 59 * source buffer 60 * @param w width of the source buffer 61 * @param h height of the source buffer 62 */ 63 void (*emulated_edge_mc)(uint8_t *dst, const uint8_t *src, 64 ptrdiff_t dst_linesize, 65 ptrdiff_t src_linesize, 66 int block_w, int block_h, 67 int src_x, int src_y, int w, int h); 68 69 /** 70 * Prefetch memory into cache (if supported by hardware). 71 * 72 * @param buf pointer to buffer to prefetch memory from 73 * @param stride distance between two lines of buf (in bytes) 74 * @param h number of lines to prefetch 75 */ 76 void (*prefetch)(uint8_t *buf, ptrdiff_t stride, int h); 77 } VideoDSPContext; 78 79 void ff_videodsp_init(VideoDSPContext *ctx, int bpc); 80 81 /* for internal use only (i.e. called by ff_videodsp_init() */ 82 void ff_videodsp_init_aarch64(VideoDSPContext *ctx, int bpc); 83 void ff_videodsp_init_arm(VideoDSPContext *ctx, int bpc); 84 void ff_videodsp_init_ppc(VideoDSPContext *ctx, int bpc); 85 void ff_videodsp_init_x86(VideoDSPContext *ctx, int bpc); 86 void ff_videodsp_init_mips(VideoDSPContext *ctx, int bpc); 87 88 #endif /* AVCODEC_VIDEODSP_H */ 89