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/*
* videodir.h: Functions to maintain a distributed video directory
*
* See the main source file 'vdr.c' for copyright information and
* how to reach the author.
*
* $Id: videodir.h 2.3 2012/09/30 11:01:15 kls Exp $
*/
#ifndef __VIDEODIR_H
#define __VIDEODIR_H
#include <stdlib.h>
#include "tools.h"
extern const char *VideoDirectory;
void SetVideoDirectory(const char *Directory);
cUnbufferedFile *OpenVideoFile(const char *FileName, int Flags);
int CloseVideoFile(cUnbufferedFile *File);
bool RenameVideoFile(const char *OldName, const char *NewName);
bool RemoveVideoFile(const char *FileName);
bool VideoFileSpaceAvailable(int SizeMB);
int VideoDiskSpace(int *FreeMB = NULL, int *UsedMB = NULL); // returns the used disk space in percent
cString PrefixVideoFileName(const char *FileName, char Prefix);
void RemoveEmptyVideoDirectories(const char *IgnoreFiles[] = NULL);
bool IsOnVideoDirectoryFileSystem(const char *FileName);
class cVideoDiskUsage {
private:
static int state;
static time_t lastChecked;
static int usedPercent;
static int freeMB;
static int freeMinutes;
public:
static bool HasChanged(int &State);
///< Returns true if the usage of the video disk space has changed since the last
///< call to this function with the given State variable. The caller should
///< initialize State to -1, and it will be set to the current internal state
///< value of the video disk usage checker upon return. Future calls with the same
///< State variable can then quickly check for changes.
static void ForceCheck(void) { lastChecked = 0; }
///< To avoid unnecessary load, the video disk usage is only actually checked
///< every DISKSPACECHEK seconds. Calling ForceCheck() makes sure that the next call
///< to HasChanged() will check the disk usage immediately. This is useful in case
///< some files have been deleted and the result shall be displayed instantly.
static cString String(void);
///< Returns a localized string of the form "Disk nn% - hh:mm free".
///< This function is mainly for use in skins that want to retain the display of the
///< free disk space in the menu title, as was the case until VDR version 1.7.27.
///< An implicit call to HasChanged() is done in this function, to make sure the
///< returned value is up to date.
static int UsedPercent(void) { return usedPercent; }
///< Returns the used space of the video disk in percent.
///< The caller should call HasChanged() first, to make sure the value is up to date.
static int FreeMB(void) { return freeMB; }
///< Returns the amount of free space on the video disk in MB.
///< The caller should call HasChanged() first, to make sure the value is up to date.
static int FreeMinutes(void) { return freeMinutes; }
///< Returns the number of minutes that can still be recorded on the video disk.
///< This is an estimate and depends on the data rate of the existing recordings.
///< There is no guarantee that this value will actually be met.
///< The caller should call HasChanged() first, to make sure the value is up to date.
};
#endif //__VIDEODIR_H
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