public unsafe CMSampleTimingInfo [] GetSampleTimingInfo(out OSStatus status)
{
nint count;
status = 0;
if (handle == IntPtr.Zero)
{
return(null);
}
if ((status = CMSampleBufferGetSampleTimingInfoArray(handle, 0, null, out count)) != 0)
{
return(null);
}
CMSampleTimingInfo [] pInfo = new CMSampleTimingInfo [count];
if (count == 0)
{
return(pInfo);
fixed(CMSampleTimingInfo *info = pInfo)
if ((status = CMSampleBufferGetSampleTimingInfoArray(handle, count, info, out count)) != 0)
{
return(null);
}
return(pInfo);
}
public unsafe CMSampleTimingInfo []? GetSampleTimingInfo(out OSStatus status)
{
nint count;
status = default(OSStatus);
if (Handle == IntPtr.Zero)
{
return(null);
}
status = CMSampleBufferGetSampleTimingInfoArray(Handle, 0, null, out count);
if (status != (OSStatus)0)
{
return(null);
}
CMSampleTimingInfo [] pInfo = new CMSampleTimingInfo [count];
if (count == 0)
{
return(pInfo);
fixed(CMSampleTimingInfo *info = pInfo)
{
status = CMSampleBufferGetSampleTimingInfoArray(Handle, count, info, out count);
if (status != (OSStatus)0)
{
return(null);
}
}
return(pInfo);
}
static extern /* OSStatus */ CMSampleBufferError CMSampleBufferCreateForImageBuffer(
/* CFAllocatorRef */ IntPtr allocator,
/* CVImageBufferRef */ IntPtr imageBuffer,
/* Boolean */ [MarshalAs(UnmanagedType.I1)] bool dataReady,
/* CMSampleBufferMakeDataReadyCallback */ IntPtr makeDataReadyCallback,
/* void* */ IntPtr makeDataReadyRefcon,
/* CMVideoFormatDescriptionRef */ IntPtr formatDescription,
/* const CMSampleTimingInfo* */ ref CMSampleTimingInfo sampleTiming,
/* CMSampleBufferRef* */ out IntPtr bufOut
);
public static CMSampleBuffer CreateReadyWithImageBuffer(CVImageBuffer imageBuffer,
CMFormatDescription formatDescription, ref CMSampleTimingInfo sampleTiming, out CMSampleBufferError error)
{
if (imageBuffer == null)
{
throw new ArgumentNullException(nameof(imageBuffer));
}
if (formatDescription == null)
{
throw new ArgumentNullException(nameof(formatDescription));
}
IntPtr buffer;
error = CMSampleBufferCreateReadyWithImageBuffer(IntPtr.Zero, imageBuffer.handle,
formatDescription.Handle, ref sampleTiming, out buffer);
if (error != CMSampleBufferError.None)
return(null); }
extern static /* OSStatus */ CMSampleBufferError CMSampleBufferCreateReadyWithImageBuffer(
/* CFAllocatorRef */ IntPtr allocator,
/* CVImageBufferRef */ IntPtr imageBuffer,
/* CMFormatDescriptionRef */ IntPtr formatDescription, // not null
/* const CMSampleTimingInfo * CM_NONNULL */ ref CMSampleTimingInfo sampleTiming,
/* CMSampleBufferRef* */ out IntPtr sBufOut);
public static CMSampleBuffer CreateForImageBuffer(CVImageBuffer imageBuffer, bool dataReady, CMVideoFormatDescription formatDescription, CMSampleTimingInfo sampleTiming, out CMSampleBufferError error)
{
if (imageBuffer == null)
{
throw new ArgumentNullException("imageBuffer");
}
if (formatDescription == null)
{
throw new ArgumentNullException("formatDescription");
}
IntPtr buffer;
error = CMSampleBufferCreateForImageBuffer(IntPtr.Zero,
imageBuffer.handle, dataReady,
IntPtr.Zero, IntPtr.Zero,
formatDescription.handle,
ref sampleTiming,
out buffer);
if (error != CMSampleBufferError.None)
{
return(null);
}
return(new CMSampleBuffer(buffer, true));
}
public static CMSampleBuffer?CreateForImageBuffer(CVImageBuffer imageBuffer, bool dataReady, CMVideoFormatDescription formatDescription, CMSampleTimingInfo sampleTiming, out CMSampleBufferError error)
{
if (imageBuffer is null)
{
ObjCRuntime.ThrowHelper.ThrowArgumentNullException(nameof(imageBuffer));
}
if (formatDescription is null)
{
ObjCRuntime.ThrowHelper.ThrowArgumentNullException(nameof(formatDescription));
}
IntPtr buffer;
error = CMSampleBufferCreateForImageBuffer(IntPtr.Zero,
imageBuffer.Handle, dataReady,
IntPtr.Zero, IntPtr.Zero,
formatDescription.Handle,
ref sampleTiming,
out buffer);
if (error != CMSampleBufferError.None)
{
return(null);
}
return(new CMSampleBuffer(buffer, true));
}
