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ffmpeg-4.2.2/libavutil/tests/file.c 1023 Bytes
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 "libavutil/file.c"
  
  #undef printf
  
  int main(void)
  {
      uint8_t *buf;
      size_t size;
      if (av_file_map("file.c", &buf, &size, 0, NULL) < 0)
          return 1;
  
      buf[0] = 's';
      printf("%s", buf);
      av_file_unmap(buf, size);
      return 0;
  }