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ffmpeg-4.2.2/libavutil/mem_internal.h 1.41 KB
aac5773f   hucm   功能基本完成,接口待打磨
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  /*
   * Copyright (c) 2002 Fabrice Bellard
   *
   * 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
   */
  
  #ifndef AVUTIL_MEM_INTERNAL_H
  #define AVUTIL_MEM_INTERNAL_H
  
  #include "avassert.h"
  #include "mem.h"
  
  static inline int ff_fast_malloc(void *ptr, unsigned int *size, size_t min_size, int zero_realloc)
  {
      void *val;
  
      memcpy(&val, ptr, sizeof(val));
      if (min_size <= *size) {
          av_assert0(val || !min_size);
          return 0;
      }
      min_size = FFMAX(min_size + min_size / 16 + 32, min_size);
      av_freep(ptr);
      val = zero_realloc ? av_mallocz(min_size) : av_malloc(min_size);
      memcpy(ptr, &val, sizeof(val));
      if (!val)
          min_size = 0;
      *size = min_size;
      return 1;
  }
  #endif /* AVUTIL_MEM_INTERNAL_H */