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ffmpeg-4.2.2/libavcodec/alpha/blockdsp_alpha.c 1.37 KB
aac5773f   hucm   功能基本完成,接口待打磨
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  /*
   * Alpha optimised block operations
   * Copyright (c) 2002 Falk Hueffner <falk@debian.org>
   *
   * 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 <stdint.h>
  
  #include "libavutil/attributes.h"
  #include "libavcodec/blockdsp.h"
  #include "asm.h"
  
  static void clear_blocks_axp(int16_t *blocks) {
      uint64_t *p = (uint64_t *) blocks;
      int n = sizeof(int16_t) * 6 * 64;
  
      do {
          p[0] = 0;
          p[1] = 0;
          p[2] = 0;
          p[3] = 0;
          p[4] = 0;
          p[5] = 0;
          p[6] = 0;
          p[7] = 0;
          p += 8;
          n -= 8 * 8;
      } while (n);
  }
  
  av_cold void ff_blockdsp_init_alpha(BlockDSPContext *c)
  {
      c->clear_blocks = clear_blocks_axp;
  }