public int RequestAllocator(IntPtr pPreferred, AllocatorProperties pProps, out IntPtr ppActual)
{
ppActual = IntPtr.Zero;
if (m_pUnknown == IntPtr.Zero) return E_NOINTERFACE;
RequestAllocatorProc _Proc = GetProcDelegate<RequestAllocatorProc>(3);
if (_Proc == null) return E_UNEXPECTED;
return (HRESULT)_Proc(
m_pUnknown,
pPreferred, pProps, out ppActual
);
}
public int SetProperties(AllocatorProperties pRequest, AllocatorProperties pActual)
{
if (m_pUnknown == IntPtr.Zero) return E_NOINTERFACE;
SetPropertiesProc _Proc = GetProcDelegate<SetPropertiesProc>(3);
if (_Proc == null) return E_UNEXPECTED;
return (HRESULT)_Proc(
m_pUnknown,
pRequest, pActual
);
}
public int GetProperties(AllocatorProperties pProps)
{
if (m_pUnknown == IntPtr.Zero) return E_NOINTERFACE;
GetPropertiesProc _Proc = GetProcDelegate<GetPropertiesProc>(4);
if (_Proc == null) return E_UNEXPECTED;
return (HRESULT)_Proc(
m_pUnknown,
pProps
);
}
/// <summary>
/// Requests an allocator during the pin connection.
/// </summary>
/// <param name="pPreferred">Pointer to the <see cref="IMemAllocator"/> interface on the input pin's preferred allocator, or NULL.</param>
/// <param name="pProps">An <see cref="AllocatorProperties"/> structure, allocated by the caller. The caller should fill in any allocator properties that the input pin requires, and set the remaining members to zero.</param>
/// <param name="ppActual">Pointer that receives an <see cref="IMemAllocator"/>.</param>
/// <returns></returns>
public int RequestAllocator(IntPtr pPreferred, AllocatorProperties pProps, out IntPtr ppActual)
{
lock (m_Lock)
{
// We are not working with Allocators, set the outgoing pointer to 0
ppActual = IntPtr.Zero;
return S_OK;
}
}
public override int DecideBufferSize(ref IMemAllocatorImpl pAlloc, ref AllocatorProperties prop)
{
Console.WriteLine("DecideBufferSize");
if (!Output.IsConnected) return VFW_E_NOT_CONNECTED;
if (Output.CurrentMediaType.majorType != MediaType.Video) return VFW_E_INVALIDMEDIATYPE;
AllocatorProperties _actual = new AllocatorProperties();
BitmapInfoHeader _bmi = (BitmapInfoHeader)Output.CurrentMediaType;
if (_bmi == null) return VFW_E_INVALIDMEDIATYPE;
prop.cbBuffer = _bmi.GetBitmapSize();
if (prop.cbBuffer < _bmi.ImageSize)
{
prop.cbBuffer = _bmi.ImageSize;
}
prop.cBuffers = 1;
int hr = pAlloc.SetProperties(prop, _actual);
return hr;
}
public int SuggestAllocatorProperties(AllocatorProperties pprop)
{
if (IsConnected) return VFW_E_ALREADY_CONNECTED;
var hr = (HRESULT)CamFilter.SuggestAllocatorProperties(pprop);
if (FAILED(hr))
{
_properties = null;
return hr;
}
if (_properties == null)
{
_properties = new AllocatorProperties();
CamFilter.GetAllocatorProperties(_properties);
}
if (pprop.cbBuffer != -1) _properties.cbBuffer = pprop.cbBuffer;
if (pprop.cbAlign != -1) _properties.cbAlign = pprop.cbAlign;
if (pprop.cbPrefix != -1) _properties.cbPrefix = pprop.cbPrefix;
if (pprop.cBuffers != -1) _properties.cBuffers = pprop.cBuffers;
return NOERROR;
}
public override int DecideBufferSize(ref IMemAllocatorImpl pAlloc, ref AllocatorProperties pProperties)
{
if (!IsConnected) return VFW_E_NOT_CONNECTED;
var actual = new AllocatorProperties();
var hr = (HRESULT)GetAllocatorProperties(actual);
if (SUCCEEDED(hr) && actual.cBuffers <= pProperties.cBuffers && actual.cbBuffer <= pProperties.cbBuffer && actual.cbAlign == pProperties.cbAlign)
{
actual = new AllocatorProperties();
hr = (HRESULT)pAlloc.SetProperties(pProperties, actual);
if (SUCCEEDED(hr))
{
pProperties.cbAlign = actual.cbAlign;
pProperties.cbBuffer = actual.cbBuffer;
pProperties.cbPrefix = actual.cbPrefix;
pProperties.cBuffers = actual.cBuffers;
}
}
return CamFilter.DecideBufferSize(ref pAlloc, ref pProperties);
}
public override int DecideBufferSize(ref IMemAllocatorImpl pAlloc, ref AllocatorProperties pProperties)
{
if (!IsConnected) return VFW_E_NOT_CONNECTED;
AllocatorProperties _actual = new AllocatorProperties();
HRESULT hr = (HRESULT)GetAllocatorProperties(_actual);
if (SUCCEEDED(hr) && _actual.cBuffers <= pProperties.cBuffers && _actual.cbBuffer <= pProperties.cbBuffer && _actual.cbAlign == pProperties.cbAlign)
{
AllocatorProperties Actual = new AllocatorProperties();
hr = (HRESULT)pAlloc.SetProperties(pProperties, Actual);
if (SUCCEEDED(hr))
{
pProperties.cbAlign = Actual.cbAlign;
pProperties.cbBuffer = Actual.cbBuffer;
pProperties.cbPrefix = Actual.cbPrefix;
pProperties.cBuffers = Actual.cBuffers;
}
}
return (m_Filter as VirtualCamFilter).DecideBufferSize(ref pAlloc, ref pProperties);
}
public int GetAllocatorProperties(AllocatorProperties pprop)
{
if (pprop == null) return E_POINTER;
if (_properties != null)
{
pprop.cbAlign = _properties.cbAlign;
pprop.cbBuffer = _properties.cbBuffer;
pprop.cbPrefix = _properties.cbPrefix;
pprop.cBuffers = _properties.cBuffers;
return NOERROR;
}
if (IsConnected)
{
var hr = (HRESULT)Allocator.GetProperties(pprop);
if (SUCCEEDED(hr) && pprop.cBuffers > 0 && pprop.cbBuffer > 0) return hr;
}
return CamFilter.GetAllocatorProperties(pprop);
}
public int SuggestAllocatorProperties(AllocatorProperties pprop)
{
AllocatorProperties _properties = new AllocatorProperties();
HRESULT hr = (HRESULT)GetAllocatorProperties(_properties);
if (FAILED(hr)) return hr;
if (pprop.cbBuffer != -1)
{
if (pprop.cbBuffer < _properties.cbBuffer) return E_FAIL;
}
if (pprop.cbAlign != -1 && pprop.cbAlign != _properties.cbAlign) return E_FAIL;
if (pprop.cbPrefix != -1 && pprop.cbPrefix != _properties.cbPrefix) return E_FAIL;
if (pprop.cBuffers != -1 && pprop.cBuffers < 1) return E_FAIL;
return NOERROR;
}
public int GetAllocatorProperties(AllocatorProperties pprop)
{
AMMediaType mt = Pins[0].CurrentMediaType;
if (mt.majorType == MediaType.Video)
{
int lSize = mt.sampleSize;
BitmapInfoHeader _bmi = mt;
if (_bmi != null)
{
if (lSize < _bmi.GetBitmapSize())
{
lSize = _bmi.GetBitmapSize();
}
if (lSize < _bmi.ImageSize)
{
lSize = _bmi.ImageSize;
}
}
pprop.cbBuffer = lSize;
pprop.cBuffers = 1;
pprop.cbAlign = 1;
pprop.cbPrefix = 0;
}
return NOERROR;
}
public int DecideBufferSize(ref IMemAllocatorImpl pAlloc, ref AllocatorProperties prop)
{
AllocatorProperties _actual = new AllocatorProperties();
BitmapInfoHeader _bmi = (BitmapInfoHeader)Pins[0].CurrentMediaType;
prop.cbBuffer = _bmi.GetBitmapSize();
if (prop.cbBuffer < _bmi.ImageSize)
{
prop.cbBuffer = _bmi.ImageSize;
}
if (prop.cbBuffer < m_bmi.bmiHeader.ImageSize)
{
prop.cbBuffer = m_bmi.bmiHeader.ImageSize;
}
prop.cBuffers = 1;
prop.cbAlign = 1;
prop.cbPrefix = 0;
int hr = pAlloc.SetProperties(prop, _actual);
return hr;
}
public int SuggestAllocatorProperties(AllocatorProperties pprop)
{
if (IsConnected) return VFW_E_ALREADY_CONNECTED;
HRESULT hr = (HRESULT)(m_Filter as VirtualCamFilter).SuggestAllocatorProperties(pprop);
if (FAILED(hr))
{
m_pProperties = null;
return hr;
}
if (m_pProperties == null)
{
m_pProperties = new AllocatorProperties();
(m_Filter as VirtualCamFilter).GetAllocatorProperties(m_pProperties);
}
if (pprop.cbBuffer != -1) m_pProperties.cbBuffer = pprop.cbBuffer;
if (pprop.cbAlign != -1) m_pProperties.cbAlign = pprop.cbAlign;
if (pprop.cbPrefix != -1) m_pProperties.cbPrefix = pprop.cbPrefix;
if (pprop.cBuffers != -1) m_pProperties.cBuffers = pprop.cBuffers;
return NOERROR;
}
public int GetAllocatorProperties(AllocatorProperties pprop)
{
var mt = Pins[0].CurrentMediaType;
if (mt.majorType != MediaType.Video) return NOERROR;
var lSize = mt.sampleSize;
BitmapInfoHeader bmi = mt;
if (lSize < bmi.GetBitmapSize())
{
lSize = bmi.GetBitmapSize();
}
if (lSize < bmi.ImageSize)
{
lSize = bmi.ImageSize;
}
pprop.cbBuffer = lSize;
pprop.cBuffers = 1;
pprop.cbAlign = 1;
pprop.cbPrefix = 0;
return NOERROR;
}
