mirror of
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122 lines
7.3 KiB
C++
122 lines
7.3 KiB
C++
/*
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* status.h: Status monitoring
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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: status.h 4.3 2017/06/23 09:08:24 kls Exp $
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*/
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#ifndef __STATUS_H
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#define __STATUS_H
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#include "config.h"
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#include "device.h"
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#include "player.h"
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#include "tools.h"
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// Several member functions of the following classes are called with a pointer to
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// an object from a global list (cTimer, cChannel, cRecording or cEvent). In these
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// cases the core VDR code holds a lock on the respective list. While in general a
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// plugin should only work with the objects and data that is explicitly given to it
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// in the function call, the called function may itself set a read lock (not a write
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// lock!) on this list, because read locks can be nested. It may also set read locks
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// (not write locks!) on higher order lists.
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// For instance, a function that is called with a cChannel may lock cRecordings and/or
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// cSchedules (which contains cEvent objects), but not cTimers. If a plugin needs to
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// set locks of its own (on mutexes defined inside the plugin code), it shall do so
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// after setting any locks on VDR's global lists, and it shall always set these
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// locks in the same sequence, to avoid deadlocks.
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enum eTimerChange { tcMod, tcAdd, tcDel }; // tcMod is obsolete and no longer used!
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class cTimer;
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class cStatus : public cListObject {
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private:
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static cList<cStatus> statusMonitors;
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protected:
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// These functions can be implemented by derived classes to receive status information:
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virtual void ChannelChange(const cChannel *Channel) {}
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// Indicates a change in the parameters of the given Channel that may
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// require a retune.
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virtual void TimerChange(const cTimer *Timer, eTimerChange Change) {}
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// Indicates a change in the timer settings.
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// Timer points to the timer that has been added or will be deleted, respectively.
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virtual void ChannelSwitch(const cDevice *Device, int ChannelNumber, bool LiveView) {}
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// Indicates a channel switch on the given DVB device.
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// If ChannelNumber is 0, this is before the channel is being switched,
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// otherwise ChannelNumber is the number of the channel that has been switched to.
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// LiveView tells whether this channel switch is for live viewing.
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virtual void Recording(const cDevice *Device, const char *Name, const char *FileName, bool On) {}
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// The given DVB device has started (On = true) or stopped (On = false) recording Name.
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// Name is the name of the recording, without any directory path. The full file name
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// of the recording is given in FileName, which may be NULL in case there is no
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// actual file involved. If On is false, Name may be NULL.
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virtual void Replaying(const cControl *Control, const char *Name, const char *FileName, bool On) {}
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// The given player control has started (On = true) or stopped (On = false) replaying Name.
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// Name is the name of the recording, without any directory path. In case of a player that can't provide
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// a name, Name can be a string that identifies the player type (like, e.g., "DVD").
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// The full file name of the recording is given in FileName, which may be NULL in case there is no
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// actual file involved. If On is false, Name may be NULL.
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virtual void SetVolume(int Volume, bool Absolute) {}
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// The volume has been set to the given value, either
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// absolutely or relative to the current volume.
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virtual void SetAudioTrack(int Index, const char * const *Tracks) {}
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// The audio track has been set to the one given by Index, which
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// points into the Tracks array of strings. Tracks is NULL terminated.
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virtual void SetAudioChannel(int AudioChannel) {}
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// The audio channel has been set to the given value.
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// 0=stereo, 1=left, 2=right, -1=no information available.
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virtual void SetSubtitleTrack(int Index, const char * const *Tracks) {}
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// The subtitle track has been set to the one given by Index, which
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// points into the Tracks array of strings. Tracks is NULL terminated.
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virtual void OsdClear(void) {}
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// The OSD has been cleared.
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virtual void OsdTitle(const char *Title) {}
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// Title has been displayed in the title line of the menu.
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virtual void OsdStatusMessage(const char *Message) {}
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// Message has been displayed in the status line of the menu.
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// If Message is NULL, the status line has been cleared.
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virtual void OsdHelpKeys(const char *Red, const char *Green, const char *Yellow, const char *Blue) {}
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// The help keys have been set to the given values (may be NULL).
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virtual void OsdItem(const char *Text, int Index) {}
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// The OSD displays the given single line Text as menu item at Index.
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virtual void OsdCurrentItem(const char *Text) {}
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// The OSD displays the given single line Text as the current menu item.
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virtual void OsdTextItem(const char *Text, bool Scroll) {}
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// The OSD displays the given multi line text. If Text points to an
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// actual string, that text shall be displayed and Scroll has no
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// meaning. If Text is NULL, Scroll defines whether the previously
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// received text shall be scrolled up (true) or down (false) and
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// the text shall be redisplayed with the new offset.
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virtual void OsdChannel(const char *Text) {}
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// The OSD displays the single line Text with the current channel information.
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virtual void OsdProgramme(time_t PresentTime, const char *PresentTitle, const char *PresentSubtitle, time_t FollowingTime, const char *FollowingTitle, const char *FollowingSubtitle) {}
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// The OSD displays the given programme information.
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public:
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cStatus(void);
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virtual ~cStatus();
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// These functions are called whenever the related status information changes:
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static void MsgChannelChange(const cChannel *Channel);
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static void MsgTimerChange(const cTimer *Timer, eTimerChange Change);
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static void MsgChannelSwitch(const cDevice *Device, int ChannelNumber, bool LiveView);
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static void MsgRecording(const cDevice *Device, const char *Name, const char *FileName, bool On);
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static void MsgReplaying(const cControl *Control, const char *Name, const char *FileName, bool On);
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static void MsgSetVolume(int Volume, bool Absolute);
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static void MsgSetAudioTrack(int Index, const char * const *Tracks);
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static void MsgSetAudioChannel(int AudioChannel);
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static void MsgSetSubtitleTrack(int Index, const char * const *Tracks);
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static void MsgOsdClear(void);
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static void MsgOsdTitle(const char *Title);
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static void MsgOsdStatusMessage(const char *Message);
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static void MsgOsdHelpKeys(const char *Red, const char *Green, const char *Yellow, const char *Blue);
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static void MsgOsdItem(const char *Text, int Index);
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static void MsgOsdCurrentItem(const char *Text);
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static void MsgOsdTextItem(const char *Text, bool Scroll = false);
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static void MsgOsdChannel(const char *Text);
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static void MsgOsdProgramme(time_t PresentTime, const char *PresentTitle, const char *PresentSubtitle, time_t FollowingTime, const char *FollowingTitle, const char *FollowingSubtitle);
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};
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#endif //__STATUS_H
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