1 files changed, 126 insertions, 0 deletions
diff --git a/tinyDSHOW/src/DSFrameRateFilter.cxx b/tinyDSHOW/src/DSFrameRateFilter.cxx
new file mode 100644
index 0000000..ba474ae
--- /dev/null
+++ b/tinyDSHOW/src/DSFrameRateFilter.cxx
@@ -0,0 +1,126 @@
+/*
+* Copyright (C) 2009-2010 Mamadou Diop.
+*
+* Contact: Mamadou Diop <diopmamadou(at)doubango.org>
+*	
+* This file is part of Open Source Doubango Framework.
+*
+* DOUBANGO is free software: you can redistribute it and/or modify
+* it under the terms of the GNU General Public License as published by
+* the Free Software Foundation, either version 3 of the License, or
+* (at your option) any later version.
+*	
+* DOUBANGO is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+* GNU General Public License for more details.
+*	
+* You should have received a copy of the GNU General Public License
+* along with DOUBANGO.
+*
+*/
+#include <tinydshow/DSFrameRateFilter.h>
+
+#include <iostream>
+#include <string>
+
+using namespace std;
+
+#define FPS_INPUT  30
+#define FPS_OUTPUT 5
+
+DSFrameRateFilter::DSFrameRateFilter(TCHAR *tszName, LPUNKNOWN punk, HRESULT *phr)
+:CTransInPlaceFilter (tszName, punk, CLSID_DSFrameRateFilter, phr)
+{
+	this->m_rtFrameLength = (10000000)/FPS_OUTPUT;
+
+	this->m_inputFps = FPS_INPUT;
+	this->m_outputFps = FPS_OUTPUT;
+
+	this->m_iFrameNumber = 0;
+	this->m_progress = 0;
+	this->m_bProcessFrame = true;
+}
+
+DSFrameRateFilter::~DSFrameRateFilter()
+{
+}
+
+HRESULT DSFrameRateFilter::SetFps(int inputFps, int outputFps)
+{
+	if(inputFps <= 0 || outputFps <= 0)
+	{
+		return E_FAIL;
+	}
+
+	// Stop prcessing
+	this->m_bProcessFrame = false;
+
+	if(inputFps < outputFps) 
+	{
+		this->m_inputFps = this->m_outputFps = inputFps;
+	}
+	else
+	{
+		this->m_outputFps = outputFps;
+		this->m_inputFps = inputFps;
+	}
+
+	// Restart processing
+	this->m_iFrameNumber = 0;
+	this->m_progress = 0;
+	this->m_bProcessFrame = true;
+
+	return S_OK;
+}
+
+HRESULT DSFrameRateFilter::Transform(IMediaSample *pSample)
+{	
+	if(!this->m_bProcessFrame) return S_FALSE;
+
+	CheckPointer(pSample, E_POINTER);
+
+	HRESULT hr = S_OK;
+	HRESULT ret = S_FALSE;
+
+	pSample->SetTime(NULL, NULL);
+
+	// Drop frame?
+	if(this->m_iFrameNumber == 0)
+	{
+		ret = S_OK;
+	}
+	else if(this->m_progress >= this->m_inputFps)
+	{
+		this->m_progress -= this->m_inputFps;
+		ret = S_OK;
+	}
+
+	// Mark frame as accepted
+	if (ret == S_OK)
+	{
+		// Set TRUE on every sample for uncompressed frames
+		pSample->SetSyncPoint(TRUE);
+	}
+
+	this->m_progress += this->m_outputFps;
+	this->m_iFrameNumber++;
+
+	return ret;
+}
+
+HRESULT DSFrameRateFilter::CheckInputType(const CMediaType* mtIn)
+{ 
+	return S_OK;
+}
+
+//Implement CreateInstance for your filter object. Typically, CreateInstance calls the constructor of your filter clas
+CUnknown * WINAPI DSFrameRateFilter::CreateInstance(LPUNKNOWN punk, HRESULT *phr)
+{
+	DSFrameRateFilter *pNewObject = new DSFrameRateFilter(_T("Tdshow DirectShow Framerate Limiter Filter."), punk, phr );
+	if (pNewObject == NULL) 
+	{
+		*phr = E_OUTOFMEMORY;
+	}
+	return pNewObject;
+}