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/* Copyright (C) 2011-2013 Doubango Telecom <http://www.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 "internals/DSFrameRateFilter.h"
#include <iostream>
#include <string>
using namespace std;
#define FPS_INPUT 30
#define FPS_OUTPUT 5
// {7F9F08CF-139F-40b2-A283-01C4EC26A452}
TDSHOW_DEFINE_GUID(CLSID_DSFrameRateFilter,
0x7f9f08cf, 0x139f, 0x40b2, 0xa2, 0x83, 0x1, 0xc4, 0xec, 0x26, 0xa4, 0x52);
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;
}
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