diff options
author | Ronald S. Bultje <rsbultje@gmail.com> | 2012-12-15 09:46:02 -0800 |
---|---|---|
committer | Luca Barbato <lu_zero@gentoo.org> | 2012-12-20 13:40:45 +0100 |
commit | 8c53d39e7f0604127bfc96fa1182c8abe3847ac6 (patch) | |
tree | 18495cabf7f0e6d365871d3407f2534f2b80b653 /libavcodec/videodsp.h | |
parent | a925f723a915bc0255e2673f8817af5212131763 (diff) | |
download | ffmpeg-8c53d39e7f0604127bfc96fa1182c8abe3847ac6.tar.gz |
lavc: introduce VideoDSPContext
Move some functions from dsputil. The idea is that videodsp contains
functions that are useful for a large and varied set of video decoders.
Currently, it contains emulated_edge_mc() and prefetch().
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>
Diffstat (limited to 'libavcodec/videodsp.h')
-rw-r--r-- | libavcodec/videodsp.h | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/libavcodec/videodsp.h b/libavcodec/videodsp.h new file mode 100644 index 0000000000..7d785939f3 --- /dev/null +++ b/libavcodec/videodsp.h @@ -0,0 +1,71 @@ +/* + * Copyright (C) 2012 Ronald S. Bultje + * + * This file is part of Libav. + * + * Libav 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. + * + * Libav 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 Libav; 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> + +typedef struct VideoDSPContext { + /** + * Copy a rectangular area of samples to a temporary buffer and replicate + * the border samples. + * + * @param buf destination buffer + * @param src source buffer + * @param linesize number of bytes between 2 vertically adjacent samples + * in both the source and destination buffers + * @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 *buf, const uint8_t *src, + ptrdiff_t 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). + * + * @buf pointer to buffer to prefetch memory from + * @stride distance between two lines of buf (in bytes) + * @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 */ |