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458446acfa
Allow supporting files for which the image stride is smaller than the maximum block size + number of subpel mc taps, e.g. a 64x64 VP9 file or a 16x16 VP8 file with -fflags +emu_edge.
76 lines
2.7 KiB
C
76 lines
2.7 KiB
C
/*
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* Copyright (C) 2012 Ronald S. Bultje
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*
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* This file is part of Libav.
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*
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* Libav is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* Libav is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with Libav; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file
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* Core video DSP helper functions
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*/
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#ifndef AVCODEC_VIDEODSP_H
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#define AVCODEC_VIDEODSP_H
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#include <stddef.h>
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#include <stdint.h>
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typedef struct VideoDSPContext {
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/**
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* Copy a rectangular area of samples to a temporary buffer and replicate
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* the border samples.
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*
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* @param buf destination buffer
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* @param src source buffer
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* @param buf_linesize number of bytes between 2 vertically adjacent
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* samples in the destination buffer
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* @param src_linesize number of bytes between 2 vertically adjacent
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* samples in both the source buffer
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* @param block_w width of block
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* @param block_h height of block
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* @param src_x x coordinate of the top left sample of the block in the
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* source buffer
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* @param src_y y coordinate of the top left sample of the block in the
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* source buffer
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* @param w width of the source buffer
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* @param h height of the source buffer
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*/
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void (*emulated_edge_mc)(uint8_t *buf, const uint8_t *src,
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ptrdiff_t buf_linesize,
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ptrdiff_t src_linesize,
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int block_w, int block_h,
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int src_x, int src_y, int w, int h);
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/**
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* Prefetch memory into cache (if supported by hardware).
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*
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* @param buf pointer to buffer to prefetch memory from
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* @param stride distance between two lines of buf (in bytes)
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* @param h number of lines to prefetch
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*/
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void (*prefetch)(uint8_t *buf, ptrdiff_t stride, int h);
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} VideoDSPContext;
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void ff_videodsp_init(VideoDSPContext *ctx, int bpc);
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/* for internal use only (i.e. called by ff_videodsp_init() */
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void ff_videodsp_init_arm(VideoDSPContext *ctx, int bpc);
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void ff_videodsp_init_ppc(VideoDSPContext *ctx, int bpc);
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void ff_videodsp_init_x86(VideoDSPContext *ctx, int bpc);
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#endif /* AVCODEC_VIDEODSP_H */
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