1 // Copyright 2013 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef MEDIA_BASE_MEDIA_FILE_CHECKER_H_ 6 #define MEDIA_BASE_MEDIA_FILE_CHECKER_H_ 7 8 #include "base/basictypes.h" 9 #include "base/files/scoped_platform_file_closer.h" 10 #include "base/platform_file.h" 11 #include "media/base/media_export.h" 12 13 namespace base { 14 class TimeDelta; 15 } 16 17 namespace media { 18 19 // This class tries to determine if a file is a valid media file. The entire 20 // file is not decoded so a positive result from this class does not make the 21 // file safe to use in the browser process. 22 class MEDIA_EXPORT MediaFileChecker { 23 public: 24 explicit MediaFileChecker(const base::PlatformFile& file); 25 ~MediaFileChecker(); 26 27 // After opening |file|, up to |check_time| amount of wall-clock time is spent 28 // decoding the file. The amount of audio/video data decoded will depend on 29 // the bitrate of the file and the speed of the CPU. 30 bool Start(base::TimeDelta check_time); 31 32 private: 33 base::PlatformFile file_; 34 base::ScopedPlatformFileCloser file_closer_; 35 36 DISALLOW_COPY_AND_ASSIGN(MediaFileChecker); 37 }; 38 39 } // namespace media 40 41 #endif // MEDIA_BASE_MEDIA_FILE_CHECKER_H_ 42
