public static void MFGetAttribute2UINT32asUINT64(IMFAttributes pAttributes, Guid g, out int nNumerator, out int nDenominator)
{
long ul;
HResult hr;
hr = pAttributes.GetUINT64(g, out ul);
MFError.ThrowExceptionForHR(hr);
nDenominator = (int)ul;
nNumerator = (int)(ul >> 32);
}
public static long GetInt64(this IMFAttributes obj, Guid key, long defaultValue = 0)
{
if (obj == null)
{
throw new ArgumentNullException(nameof(obj));
}
if (obj.GetUINT64(key, out var value).IsError)
{
return(defaultValue);
}
return((long)value);
}
public static ulong GetUInt64(this IMFAttributes input, Guid key, ulong defaultValue = 0)
{
if (input == null)
{
throw new ArgumentNullException(nameof(input));
}
if (input.GetUINT64(key, out var value).IsError)
{
return(defaultValue);
}
return(value);
}
/// <summary>
/// Retrieves an address location value associated with a key.
/// </summary>
/// <param name="attributes">A valid IMFAttributes instance.</param>
/// <param name="guidKey">Guid that identifies which value to retrieve.</param>
/// <param name="value">Receives the requested value as an IntPtr.</param>
/// <returns>If this function succeeds, it returns the S_OK member. Otherwise, it returns another HResult's member that describe the error.</returns>
/// <remarks>Media Foundation attributes don't natively support pointer values. This method get them as a 64-bits unsigned integer and convert that value as a IntPtr.</remarks>
public static HResult GetPointer(this IMFAttributes attributes, Guid guidKey, out IntPtr value)
{
if (attributes == null)
{
throw new ArgumentNullException("attributes");
}
long result = 0;
HResult hr = attributes.GetUINT64(guidKey, out result);
value = new IntPtr(result);
return(hr);
}
/// <summary>
/// Retrieves a UInt64 value associated with a key.
/// </summary>
/// <param name="attributes">A valid IMFAttributes instance.</param>
/// <param name="guidKey">Guid that identifies which value to retrieve.</param>
/// <param name="value">Receives the requested value.</param>
/// <returns>If this function succeeds, it returns the S_OK member. Otherwise, it returns another HResult's member that describe the error.</returns>
public static HResult GetUINT64(this IMFAttributes attributes, Guid guidKey, out ulong value)
{
if (attributes == null)
{
throw new ArgumentNullException("attributes");
}
long result = 0;
HResult hr = attributes.GetUINT64(guidKey, out result);
value = (ulong)result;
return(hr);
}
public static HResult MFGetAttribute2UINT32asUINT64(IMFAttributes pAttributes, Guid guidKey, out int punHigh32, out int punLow32)
{
long unPacked;
HResult hr;
hr = pAttributes.GetUINT64(guidKey, out unPacked);
if (hr < 0)
{
punHigh32 = punLow32 = 0;
return(hr);
}
Unpack2UINT32AsUINT64(unPacked, out punHigh32, out punLow32);
return(hr);
}
/// <summary>
/// Retrieves a size value (width and height) associated with a key.
/// </summary>
/// <param name="attributes">A valid IMFAttributes instance.</param>
/// <param name="guidKey">Guid that identifies which value to retrieve.</param>
/// <param name="width">The width part of the size.</param>
/// <param name="height">The height part of the size.</param>
/// <returns>If this function succeeds, it returns the S_OK member. Otherwise, it returns another HResult's member that describe the error.</returns>
/// <remarks>Width and height values are stored packed as 64-bits value.</remarks>
public static HResult GetSize(this IMFAttributes attributes, Guid guidKey, out uint width, out uint height)
{
if (attributes == null)
{
throw new ArgumentNullException("attributes");
}
width = 0;
height = 0;
ulong value;
HResult hr = attributes.GetUINT64(guidKey, out value);
if (hr.Succeeded())
{
width = (uint)(value >> 32);
height = (uint)(value & 0xffffffff);
}
return(hr);
}
/// <summary>
/// Retrieves a ratio value (numerator and denominator) associated with a key.
/// </summary>
/// <param name="attributes">A valid IMFAttributes instance.</param>
/// <param name="guidKey">Guid that identifies which value to retrieve.</param>
/// <param name="numerator">The numerator part of the ratio.</param>
/// <param name="denominator">The denominator part of the ratio.</param>
/// <returns>If this function succeeds, it returns the S_OK member. Otherwise, it returns another HResult's member that describe the error.</returns>
/// <remarks>Numerator and denominator values are stored packed as 64-bits value.</remarks>
public static HResult GetRatio(this IMFAttributes attributes, Guid guidKey, out uint numerator, out uint denominator)
{
if (attributes == null)
{
throw new ArgumentNullException("attributes");
}
numerator = 0;
denominator = 0;
ulong value;
HResult hr = attributes.GetUINT64(guidKey, out value);
if (hr.Succeeded())
{
numerator = (uint)(value >> 32);
denominator = (uint)(value & 0xffffffff);
}
return(hr);
}
public static void MFGetAttribute2UINT32asUINT64(IMFAttributes pAttributes, Guid g, out int nNumerator, out int nDenominator)
{
long ul;
int hr;
hr = pAttributes.GetUINT64(g, out ul);
MFError.ThrowExceptionForHR(hr);
nDenominator = (int)ul;
nNumerator = (int)(ul >> 32);
}
public HResult GetUINT64(Guid guidKey, out long punValue)
{
return(m_Attribs.GetUINT64(guidKey, out punValue));
}
