Subversion Repositories Kolibri OS

Rev

Go to most recent revision | Blame | Last modification | View Log | RSS feed

  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, ptrdiff_t dst_stride, \
  34.                                    const uint8_t *src, 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 src_stride number of bytes between 2 vertically adjacent samples
  51.      *                   in source buffer
  52.      * @param block_w width of block
  53.      * @param block_h height of block
  54.      * @param src_x x coordinate of the top left sample of the block in the
  55.      *                source buffer
  56.      * @param src_y y coordinate of the top left sample of the block in the
  57.      *                source buffer
  58.      * @param w width of the source buffer
  59.      * @param h height of the source buffer
  60.      */
  61.     void (*emulated_edge_mc)(uint8_t *dst, ptrdiff_t dst_stride,
  62.                              const uint8_t *src, ptrdiff_t src_stride,
  63.                              int block_w, int block_h,
  64.                              int src_x, int src_y, int w, int h);
  65.  
  66.     /**
  67.      * Prefetch memory into cache (if supported by hardware).
  68.      *
  69.      * @param buf    pointer to buffer to prefetch memory from
  70.      * @param stride distance between two lines of buf (in bytes)
  71.      * @param h      number of lines to prefetch
  72.      */
  73.     void (*prefetch)(uint8_t *buf, ptrdiff_t stride, int h);
  74. } VideoDSPContext;
  75.  
  76. void ff_videodsp_init(VideoDSPContext *ctx, int bpc);
  77.  
  78. /* for internal use only (i.e. called by ff_videodsp_init() */
  79. void ff_videodsp_init_arm(VideoDSPContext *ctx, int bpc);
  80. void ff_videodsp_init_ppc(VideoDSPContext *ctx, int bpc);
  81. void ff_videodsp_init_x86(VideoDSPContext *ctx, int bpc);
  82.  
  83. #endif /* AVCODEC_VIDEODSP_H */
  84.