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/*
* 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 <cguid.h>
#include "modules/video_capture/windows/help_functions_ds.h"
#include "rtc_base/logging.h"
namespace webrtc {
namespace videocapturemodule {
// This returns minimum :), which will give max frame rate...
LONGLONG GetMaxOfFrameArray(LONGLONG* maxFps, long size) {
if (!maxFps || size <= 0) {
return 0;
}
LONGLONG maxFPS = maxFps[0];
for (int i = 0; i < size; i++) {
if (maxFPS > maxFps[i])
maxFPS = maxFps[i];
}
return maxFPS;
}
IPin* GetInputPin(IBaseFilter* filter) {
IPin* pin = NULL;
IEnumPins* pPinEnum = NULL;
filter->EnumPins(&pPinEnum);
if (pPinEnum == NULL) {
return NULL;
}
// get first unconnected pin
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) {
IPin* pin = NULL;
IEnumPins* pPinEnum = NULL;
filter->EnumPins(&pPinEnum);
if (pPinEnum == NULL) {
return NULL;
}
// get first unconnected pin
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;
}
void ResetMediaType(AM_MEDIA_TYPE* media_type) {
if (!media_type)
return;
if (media_type->cbFormat != 0) {
CoTaskMemFree(media_type->pbFormat);
media_type->cbFormat = 0;
media_type->pbFormat = nullptr;
}
if (media_type->pUnk) {
media_type->pUnk->Release();
media_type->pUnk = nullptr;
}
}
void FreeMediaType(AM_MEDIA_TYPE* media_type) {
if (!media_type)
return;
ResetMediaType(media_type);
CoTaskMemFree(media_type);
}
HRESULT CopyMediaType(AM_MEDIA_TYPE* target, const AM_MEDIA_TYPE* source) {
RTC_DCHECK_NE(source, target);
*target = *source;
if (source->cbFormat != 0) {
RTC_DCHECK(source->pbFormat);
target->pbFormat =
reinterpret_cast<BYTE*>(CoTaskMemAlloc(source->cbFormat));
if (target->pbFormat == nullptr) {
target->cbFormat = 0;
return E_OUTOFMEMORY;
} else {
CopyMemory(target->pbFormat, source->pbFormat, target->cbFormat);
}
}
if (target->pUnk != nullptr)
target->pUnk->AddRef();
return S_OK;
}
wchar_t* DuplicateWideString(const wchar_t* str) {
size_t len = lstrlenW(str);
wchar_t* ret =
reinterpret_cast<LPWSTR>(CoTaskMemAlloc((len + 1) * sizeof(wchar_t)));
lstrcpyW(ret, str);
return ret;
}
} // namespace videocapturemodule
} // namespace webrtc