DRMVideoSync Class Reference

Video synchronization class employing /dev/drm0. More...

#include <vsync.h>

Inheritance diagram for DRMVideoSync:

List of all members.

Public Member Functions
	DRMVideoSync (VideoOutput *, int frame_interval, int refresh_interval, bool interlaced)
	~DRMVideoSync ()
QString	getName (void) const
	Returns name of instanciated VSync method.
bool	TryInit (void)
	Tries to initialize VSync method.
void	Start (void)
	Start VSync; must be called from main thread.
int	WaitForFrame (int sync_delay)
	Waits for next a frame or field.
Private Attributes
int	m_dri_fd
Static Private Attributes
static const char *	sm_dri_dev = "/dev/dri/card0"

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Detailed Description

Video synchronization class employing /dev/drm0.

Polls /dev/drm0 to wait for retrace. Phase-maintaining, meaning WaitForFrame should always return approximately the same time after a vertical retrace.

Definition at line 118 of file vsync.h.

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Constructor & Destructor Documentation

DRMVideoSync::DRMVideoSync	(	VideoOutput *	vo,
		int	frame_interval,
		int	refresh_interval,
		bool	interlaced
	)

Definition at line 243 of file vsync.cpp.

DRMVideoSync::~DRMVideoSync

(

)

Definition at line 249 of file vsync.cpp.

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Member Function Documentation

QString DRMVideoSync::getName

(

void

)

const [inline, virtual]

Returns name of instanciated VSync method.

Implements VideoSync.

Definition at line 125 of file vsync.h.

bool DRMVideoSync::TryInit

(

void

)

[virtual]

Tries to initialize VSync method.

Implements VideoSync.

Definition at line 256 of file vsync.cpp.

void DRMVideoSync::Start

(

void

)

[virtual]

Start VSync; must be called from main thread.

Start(void), WaitForFrame(void), and Stop(void) should always be called from same thread, to prevent bad interactions with threads.

Reimplemented from VideoSync.

Definition at line 282 of file vsync.cpp.

int DRMVideoSync::WaitForFrame

(

int

sync_delay

)

[virtual]

Waits for next a frame or field.

Returns delay to real frame timing in usec

Start(void), WaitForFrame(void), and Stop(void) should always be called from same thread, to prevent bad interactions with threads.

Parameters:

sync_delay

time until the desired frame or field

See also:

CalcDelay(void), KeepPhase(void)

Implements VideoSync.

Definition at line 292 of file vsync.cpp.

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Member Data Documentation

int DRMVideoSync::m_dri_fd [private]

Definition at line 131 of file vsync.h.

Referenced by DRMVideoSync(), Start(), TryInit(), WaitForFrame(), and ~DRMVideoSync().

const char * DRMVideoSync::sm_dri_dev = "/dev/dri/card0" [static, private]

Definition at line 132 of file vsync.h.

Referenced by TryInit().

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The documentation for this class was generated from the following files:

• vsync.h
• vsync.cpp