blob: 12deab0128103c2f8c6ac7d0f5dd47b3914b1dfc [file] [log] [blame]
/*
* Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include <initguid.h> // Must come before the help_functions_ds.h include so
// that DEFINE_GUID() entries will be defined in this
// object file.
#include "modules/video_capture/windows/help_functions_ds.h"
#include <cguid.h>
namespace webrtc
{
namespace videocapturemodule
{
// This returns minimum :), which will give max frame rate...
LONGLONG GetMaxOfFrameArray(LONGLONG *maxFps, long size)
{
LONGLONG maxFPS = maxFps[0];
for (int i = 0; i < size; i++)
{
if (maxFPS > maxFps[i])
maxFPS = maxFps[i];
}
return maxFPS;
}
IPin* GetInputPin(IBaseFilter* filter)
{
HRESULT hr;
IPin* pin = NULL;
IEnumPins* pPinEnum = NULL;
filter->EnumPins(&pPinEnum);
if (pPinEnum == NULL)
{
return NULL;
}
// get first unconnected pin
hr = pPinEnum->Reset(); // set to first pin
while (S_OK == pPinEnum->Next(1, &pin, NULL))
{
PIN_DIRECTION pPinDir;
pin->QueryDirection(&pPinDir);
if (PINDIR_INPUT == pPinDir) // This is an input pin
{
IPin* tempPin = NULL;
if (S_OK != pin->ConnectedTo(&tempPin)) // The pint is not connected
{
pPinEnum->Release();
return pin;
}
}
pin->Release();
}
pPinEnum->Release();
return NULL;
}
IPin* GetOutputPin(IBaseFilter* filter, REFGUID Category)
{
HRESULT hr;
IPin* pin = NULL;
IEnumPins* pPinEnum = NULL;
filter->EnumPins(&pPinEnum);
if (pPinEnum == NULL)
{
return NULL;
}
// get first unconnected pin
hr = pPinEnum->Reset(); // set to first pin
while (S_OK == pPinEnum->Next(1, &pin, NULL))
{
PIN_DIRECTION pPinDir;
pin->QueryDirection(&pPinDir);
if (PINDIR_OUTPUT == pPinDir) // This is an output pin
{
if (Category == GUID_NULL || PinMatchesCategory(pin, Category))
{
pPinEnum->Release();
return pin;
}
}
pin->Release();
pin = NULL;
}
pPinEnum->Release();
return NULL;
}
BOOL PinMatchesCategory(IPin *pPin, REFGUID Category)
{
BOOL bFound = FALSE;
IKsPropertySet *pKs = NULL;
HRESULT hr = pPin->QueryInterface(IID_PPV_ARGS(&pKs));
if (SUCCEEDED(hr))
{
GUID PinCategory;
DWORD cbReturned;
hr = pKs->Get(AMPROPSETID_Pin, AMPROPERTY_PIN_CATEGORY, NULL, 0, &PinCategory,
sizeof(GUID), &cbReturned);
if (SUCCEEDED(hr) && (cbReturned == sizeof(GUID)))
{
bFound = (PinCategory == Category);
}
pKs->Release();
}
return bFound;
}
} // namespace videocapturemodule
} // namespace webrtc