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ffmpeg-4.2.2/libavcodec/bit_depth_template.c 2.86 KB
aac5773f   hucm   功能基本完成,接口待打磨
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  /*
   * 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
   */
  
  #include "mathops.h"
  #include "rnd_avg.h"
  #include "libavutil/intreadwrite.h"
  
  #ifndef BIT_DEPTH
  #define BIT_DEPTH 8
  #endif
  
  #ifdef AVCODEC_BIT_DEPTH_TEMPLATE_C
  #   undef pixel
  #   undef pixel2
  #   undef pixel4
  #   undef dctcoef
  #   undef idctin
  #   undef INIT_CLIP
  #   undef no_rnd_avg_pixel4
  #   undef rnd_avg_pixel4
  #   undef AV_RN2P
  #   undef AV_RN4P
  #   undef AV_RN4PA
  #   undef AV_WN2P
  #   undef AV_WN4P
  #   undef AV_WN4PA
  #   undef CLIP
  #   undef FUNC
  #   undef FUNCC
  #   undef av_clip_pixel
  #   undef PIXEL_SPLAT_X4
  #else
  #   define AVCODEC_BIT_DEPTH_TEMPLATE_C
  #endif
  
  #if BIT_DEPTH > 8
  #   define pixel  uint16_t
  #   define pixel2 uint32_t
  #   define pixel4 uint64_t
  #   define dctcoef int32_t
  
  #ifdef IN_IDCT_DEPTH
  #if IN_IDCT_DEPTH == 32
  #   define idctin int32_t
  #else
  #   define idctin int16_t
  #endif
  #else
  #   define idctin int16_t
  #endif
  
  #   define INIT_CLIP
  #   define no_rnd_avg_pixel4 no_rnd_avg64
  #   define    rnd_avg_pixel4    rnd_avg64
  #   define AV_RN2P  AV_RN32
  #   define AV_RN4P  AV_RN64
  #   define AV_RN4PA AV_RN64A
  #   define AV_WN2P  AV_WN32
  #   define AV_WN4P  AV_WN64
  #   define AV_WN4PA AV_WN64A
  #   define PIXEL_SPLAT_X4(x) ((x)*0x0001000100010001ULL)
  
  #   define av_clip_pixel(a) av_clip_uintp2(a, BIT_DEPTH)
  #   define CLIP(a)          av_clip_uintp2(a, BIT_DEPTH)
  #else
  #   define pixel  uint8_t
  #   define pixel2 uint16_t
  #   define pixel4 uint32_t
  #   define dctcoef int16_t
  #   define idctin  int16_t
  
  #   define INIT_CLIP
  #   define no_rnd_avg_pixel4 no_rnd_avg32
  #   define    rnd_avg_pixel4    rnd_avg32
  #   define AV_RN2P  AV_RN16
  #   define AV_RN4P  AV_RN32
  #   define AV_RN4PA AV_RN32A
  #   define AV_WN2P  AV_WN16
  #   define AV_WN4P  AV_WN32
  #   define AV_WN4PA AV_WN32A
  #   define PIXEL_SPLAT_X4(x) ((x)*0x01010101U)
  
  #   define av_clip_pixel(a) av_clip_uint8(a)
  #   define CLIP(a) av_clip_uint8(a)
  #endif
  
  #define FUNC3(a, b, c)  a ## _ ## b ##  c
  #define FUNC2(a, b, c)  FUNC3(a, b, c)
  #define FUNC(a)  FUNC2(a, BIT_DEPTH,)
  #define FUNCC(a) FUNC2(a, BIT_DEPTH, _c)
  #define FUNC4(a, b, c)  a ## _int ## b ## _ ## c ## bit
  #define FUNC5(a, b, c)  FUNC4(a, b, c)
  #define FUNC6(a)  FUNC5(a, IN_IDCT_DEPTH, BIT_DEPTH)