From b227e26b829bd2670c91f670ce71d16c89e1fe58 Mon Sep 17 00:00:00 2001
From: Sascha Volkenandt <sascha (at) akv-soft (dot) de>
Date: Fri, 4 May 2007 19:39:38 +0000
Subject: - added intervals for min/max grabs

---
 grab.cpp | 22 +++++++++++++++++++++-
 1 file changed, 21 insertions(+), 1 deletion(-)

(limited to 'grab.cpp')

diff --git a/grab.cpp b/grab.cpp
index 9211b92..5d6b3f5 100644
--- a/grab.cpp
+++ b/grab.cpp
@@ -1,21 +1,31 @@
 #include <cstdlib>
 #include <vdr/device.h>
+#include <vdr/tools.h>
 #include "grab.h"
 
 namespace vdrlive {
 
 using namespace std;
 
+const unsigned int GrabMinIntervalMs = 500; 
+const unsigned int GrabPauseIntervalMs = GrabMinIntervalMs * 10;
+
 class GrabImageTask: public StickyTask
 {
 public:
 	explicit GrabImageTask( int quality = 80, int width = 320, int height = 240 )
-		: m_quality( quality )
+		: m_firstTime( 0 )
+		, m_lastTime( 0 )
+		, m_quality( quality )
 		, m_width( width )
 		, m_height( height )
 		{}
 
+	void Activate() { m_firstTime = 0; }
+
 private:
+	uint64_t m_firstTime;
+	uint64_t m_lastTime;
 	int m_quality;
 	int m_width;
 	int m_height;
@@ -25,6 +35,14 @@ private:
 
 void GrabImageTask::Action()
 {
+	uint64_t now = cTimeMs::Now();
+
+	if ( m_firstTime == 0 )
+		m_firstTime = now;
+
+	if ( now - m_lastTime < GrabMinIntervalMs || now - m_firstTime > GrabPauseIntervalMs )
+		return;
+
 	cDevice* device = cDevice::PrimaryDevice();
 	if ( device == 0 ) {
 		SetError( tr("Couldn't aquire primary device") );
@@ -39,6 +57,7 @@ void GrabImageTask::Action()
 	}
 
 	LiveGrabImageManager().PutImage( reinterpret_cast< char* >( image ), size );
+	m_lastTime = now;
 }
 
 GrabImageManager::GrabImageManager()
@@ -51,6 +70,7 @@ GrabImageManager::GrabImageManager()
 GrabImageInfo GrabImageManager::GetImage() const 
 {
 	cMutexLock lock( &LiveTaskManager() );
+	m_task->Activate();
 	return make_pair( m_image, m_size );
 }
 
-- 
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