extern static VTStatus VTCompressionSessionCreate(
/* CFAllocatorRef */ IntPtr allocator, /* can be null */
/* int32_t */ int width,
/* int32_t */ int height,
/* CMVideoCodecType */ CMVideoCodecType codecType,
/* CFDictionaryRef */ IntPtr dictionaryEncoderSpecification, /* can be null */
/* CFDictionaryRef */ IntPtr dictionarySourceImageBufferAttributes, /* can be null */
/* CFDictionaryRef */ IntPtr compressedDataAllocator, /* can be null */
/* VTCompressionOutputCallback */ CompressionOutputCallback outputCallback,
/* void* */ IntPtr outputCallbackClosure,
/* VTCompressionSessionRef* */ out IntPtr compressionSessionOut);
static VTCompressionSession Create(int width, int height, CMVideoCodecType codecType,
VTCompressionOutputCallback compressionOutputCallback,
VTVideoEncoderSpecification encoderSpecification, // hardware acceleration is default behavior on iOS. no opt-in required.
NSDictionary sourceImageBufferAttributes, CompressionOutputCallback staticCback) // Undocumented options, probably always null
{
var callbackHandle = default(GCHandle);
if (compressionOutputCallback != null)
{
callbackHandle = GCHandle.Alloc(compressionOutputCallback);
}
IntPtr ret;
var result = VTCompressionSessionCreate(IntPtr.Zero, width, height, codecType,
encoderSpecification != null ? encoderSpecification.Dictionary.Handle : IntPtr.Zero,
sourceImageBufferAttributes != null ? sourceImageBufferAttributes.Handle : IntPtr.Zero,
IntPtr.Zero,
callbackHandle.IsAllocated ? (staticCback) : null,
GCHandle.ToIntPtr(callbackHandle),
out ret);
if (result == VTStatus.Ok && ret != IntPtr.Zero)
{
return new VTCompressionSession(ret, true)
{
callbackHandle = callbackHandle
}
}
;
if (callbackHandle.IsAllocated)
{
callbackHandle.Free();
}
return(null);
}
static VTCompressionSession Create (int width, int height, CMVideoCodecType codecType,
VTCompressionOutputCallback compressionOutputCallback,
VTVideoEncoderSpecification encoderSpecification, // hardware acceleration is default behavior on iOS. no opt-in required.
NSDictionary sourceImageBufferAttributes, CompressionOutputCallback staticCback) // Undocumented options, probably always null
{
var callbackHandle = default (GCHandle);
if (compressionOutputCallback != null)
callbackHandle = GCHandle.Alloc (compressionOutputCallback);
IntPtr ret;
var result = VTCompressionSessionCreate (IntPtr.Zero, width, height, codecType,
encoderSpecification != null ? encoderSpecification.Dictionary.Handle : IntPtr.Zero,
sourceImageBufferAttributes != null ? sourceImageBufferAttributes.Handle : IntPtr.Zero,
IntPtr.Zero,
callbackHandle.IsAllocated ? (staticCback) : null,
GCHandle.ToIntPtr (callbackHandle),
out ret);
if (result == VTStatus.Ok && ret != IntPtr.Zero)
return new VTCompressionSession (ret, true) {
callbackHandle = callbackHandle
};
if (callbackHandle.IsAllocated)
callbackHandle.Free ();
return null;
}
extern static VTStatus VTCompressionSessionCreate ( /* CFAllocatorRef */ IntPtr allocator, /* can be null */ /* int32_t */ int width, /* int32_t */ int height, /* CMVideoCodecType */ CMVideoCodecType codecType, /* CFDictionaryRef */ IntPtr dictionaryEncoderSpecification, /* can be null */ /* CFDictionaryRef */ IntPtr dictionarySourceImageBufferAttributes, /* can be null */ /* CFDictionaryRef */ IntPtr compressedDataAllocator, /* can be null */ /* VTCompressionOutputCallback */ CompressionOutputCallback outputCallback, /* void* */ IntPtr outputCallbackClosure, /* VTCompressionSessionRef* */ out IntPtr compressionSessionOut);
