/* * 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, ptrdiff_t dst_stride, \ const uint8_t *src, 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 src_stride number of bytes between 2 vertically adjacent samples * in 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, ptrdiff_t dst_stride, const uint8_t *src, ptrdiff_t src_stride, 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 */