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  1. /*
  2.  * Copyright (c) 2001-2003 BERO <bero@geocities.co.jp>
  3.  * Copyright (c) 2011 Oskar Arvidsson
  4.  *
  5.  * This file is part of FFmpeg.
  6.  *
  7.  * FFmpeg is free software; you can redistribute it and/or
  8.  * modify it under the terms of the GNU Lesser General Public
  9.  * License as published by the Free Software Foundation; either
  10.  * version 2.1 of the License, or (at your option) any later version.
  11.  *
  12.  * FFmpeg is distributed in the hope that it will be useful,
  13.  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15.  * Lesser General Public License for more details.
  16.  *
  17.  * You should have received a copy of the GNU Lesser General Public
  18.  * License along with FFmpeg; if not, write to the Free Software
  19.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  20.  */
  21.  
  22. #ifndef AVCODEC_RND_AVG_H
  23. #define AVCODEC_RND_AVG_H
  24.  
  25. #include <stddef.h>
  26. #include <stdint.h>
  27.  
  28. #define CALL_2X_PIXELS(a, b, n)\
  29. static void a(uint8_t *block, const uint8_t *pixels, ptrdiff_t line_size, int h){\
  30.     b(block  , pixels  , line_size, h);\
  31.     b(block+n, pixels+n, line_size, h);\
  32. }
  33.  
  34. #define         BYTE_VEC32(c)   ((c)*0x01010101UL)
  35. #define         BYTE_VEC64(c)   ((c)*0x0001000100010001UL)
  36.  
  37. static inline uint32_t rnd_avg32(uint32_t a, uint32_t b)
  38. {
  39.     return (a | b) - (((a ^ b) & ~BYTE_VEC32(0x01)) >> 1);
  40. }
  41.  
  42. static inline uint32_t no_rnd_avg32(uint32_t a, uint32_t b)
  43. {
  44.     return (a & b) + (((a ^ b) & ~BYTE_VEC32(0x01)) >> 1);
  45. }
  46.  
  47. static inline uint64_t rnd_avg64(uint64_t a, uint64_t b)
  48. {
  49.     return (a | b) - (((a ^ b) & ~BYTE_VEC64(0x01)) >> 1);
  50. }
  51.  
  52. static inline uint64_t no_rnd_avg64(uint64_t a, uint64_t b)
  53. {
  54.     return (a & b) + (((a ^ b) & ~BYTE_VEC64(0x01)) >> 1);
  55. }
  56.  
  57. #endif /* AVCODEC_RND_AVG_H */
  58.