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ffmpeg-4.2.2/libavutil/wchar_filename.h 1.43 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
   */
  
  #ifndef AVUTIL_WCHAR_FILENAME_H
  #define AVUTIL_WCHAR_FILENAME_H
  
  #ifdef _WIN32
  #include <windows.h>
  #include "mem.h"
  
  av_warn_unused_result
  static inline int utf8towchar(const char *filename_utf8, wchar_t **filename_w)
  {
      int num_chars;
      num_chars = MultiByteToWideChar(CP_UTF8, MB_ERR_INVALID_CHARS, filename_utf8, -1, NULL, 0);
      if (num_chars <= 0) {
          *filename_w = NULL;
          return 0;
      }
      *filename_w = (wchar_t *)av_mallocz_array(num_chars, sizeof(wchar_t));
      if (!*filename_w) {
          errno = ENOMEM;
          return -1;
      }
      MultiByteToWideChar(CP_UTF8, 0, filename_utf8, -1, *filename_w, num_chars);
      return 0;
  }
  #endif
  
  #endif /* AVUTIL_WCHAR_FILENAME_H */