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ffmpeg-4.2.2/libavcodec/blockdsp.c 2.02 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 <stdint.h>
  #include <string.h>
  
  #include "config.h"
  #include "libavutil/attributes.h"
  #include "avcodec.h"
  #include "blockdsp.h"
  #include "version.h"
  
  static void clear_block_c(int16_t *block)
  {
      memset(block, 0, sizeof(int16_t) * 64);
  }
  
  static void clear_blocks_c(int16_t *blocks)
  {
      memset(blocks, 0, sizeof(int16_t) * 6 * 64);
  }
  
  static void fill_block16_c(uint8_t *block, uint8_t value, ptrdiff_t line_size,
                             int h)
  {
      int i;
  
      for (i = 0; i < h; i++) {
          memset(block, value, 16);
          block += line_size;
      }
  }
  
  static void fill_block8_c(uint8_t *block, uint8_t value, ptrdiff_t line_size,
                            int h)
  {
      int i;
  
      for (i = 0; i < h; i++) {
          memset(block, value, 8);
          block += line_size;
      }
  }
  
  av_cold void ff_blockdsp_init(BlockDSPContext *c, AVCodecContext *avctx)
  {
      c->clear_block  = clear_block_c;
      c->clear_blocks = clear_blocks_c;
  
      c->fill_block_tab[0] = fill_block16_c;
      c->fill_block_tab[1] = fill_block8_c;
  
      if (ARCH_ALPHA)
          ff_blockdsp_init_alpha(c);
      if (ARCH_ARM)
          ff_blockdsp_init_arm(c);
      if (ARCH_PPC)
          ff_blockdsp_init_ppc(c);
      if (ARCH_X86)
          ff_blockdsp_init_x86(c, avctx);
      if (ARCH_MIPS)
          ff_blockdsp_init_mips(c);
  }