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68 lines
3.1 KiB
C++
68 lines
3.1 KiB
C++
/*
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* videodir.h: Functions to maintain a distributed video directory
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*
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* See the main source file 'vdr.c' for copyright information and
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* how to reach the author.
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*
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* $Id: videodir.h 2.2 2012/09/01 10:57:07 kls Exp $
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*/
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#ifndef __VIDEODIR_H
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#define __VIDEODIR_H
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#include <stdlib.h>
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#include "tools.h"
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extern const char *VideoDirectory;
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void SetVideoDirectory(const char *Directory);
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cUnbufferedFile *OpenVideoFile(const char *FileName, int Flags);
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int CloseVideoFile(cUnbufferedFile *File);
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bool RenameVideoFile(const char *OldName, const char *NewName);
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bool RemoveVideoFile(const char *FileName);
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bool VideoFileSpaceAvailable(int SizeMB);
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int VideoDiskSpace(int *FreeMB = NULL, int *UsedMB = NULL); // returns the used disk space in percent
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cString PrefixVideoFileName(const char *FileName, char Prefix);
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void RemoveEmptyVideoDirectories(void);
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bool IsOnVideoDirectoryFileSystem(const char *FileName);
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class cVideoDiskUsage {
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private:
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static int state;
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static time_t lastChecked;
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static int usedPercent;
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static int freeMB;
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static int freeMinutes;
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public:
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static bool HasChanged(int &State);
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///< Returns true if the usage of the video disk space has changed since the last
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///< call to this function with the given State variable. The caller should
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///< initialize State to -1, and it will be set to the current internal state
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///< value of the video disk usage checker upon return. Future calls with the same
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///< State variable can then quickly check for changes.
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static void ForceCheck(void) { lastChecked = 0; }
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///< To avoid unnecessary load, the video disk usage is only actually checked
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///< every DISKSPACECHEK seconds. Calling ForceCheck() makes sure that the next call
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///< to HasChanged() will check the disk usage immediately. This is useful in case
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///< some files have been deleted and the result shall be displayed instantly.
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static cString String(void);
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///< Returns a localized string of the form "Disk nn% - hh:mm free".
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///< This function is mainly for use in skins that want to retain the display of the
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///< free disk space in the menu title, as was the case until VDR version 1.7.27.
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///< An implicit call to HasChanged() is done in this function, to make sure the
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///< returned value is up to date.
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static int UsedPercent(void) { return usedPercent; }
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///< Returns the used space of the video disk in percent.
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///< The caller should call HasChanged() first, to make sure the value is up to date.
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static int FreeMB(void) { return freeMB; }
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///< Returns the amount of free space on the video disk in MB.
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///< The caller should call HasChanged() first, to make sure the value is up to date.
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static int FreeMinutes(void) { return freeMinutes; }
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///< Returns the number of minutes that can still be recorded on the video disk.
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///< This is an estimate and depends on the data rate of the existing recordings.
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///< There is no guarantee that this value will actually be met.
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///< The caller should call HasChanged() first, to make sure the value is up to date.
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};
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#endif //__VIDEODIR_H
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