Function VTDecompressionSessionCreate

pub unsafe extern "C-unwind" fn VTDecompressionSessionCreate(
    allocator: Option<&CFAllocator>,
    video_format_description: &CMVideoFormatDescription,
    video_decoder_specification: Option<&CFDictionary>,
    destination_image_buffer_attributes: Option<&CFDictionary>,
    output_callback: *const VTDecompressionOutputCallbackRecord,
    decompression_session_out: NonNull<*mut VTDecompressionSession>,
) -> i32

Available on crate features VTErrors and objc2-core-media and objc2-core-video and VTDecompressionSession only.

Creates a session for decompressing video frames.

Decompressed frames will be emitted through calls to outputCallback.

Parameter allocator: An allocator for the session. Pass NULL to use the default allocator.

Parameter videoFormatDescription: Describes the source video frames.

Parameter videoDecoderSpecification: Specifies a particular video decoder that must be used. Pass NULL to let the video toolbox choose a decoder.

Parameter destinationImageBufferAttributes: Describes requirements for emitted pixel buffers. Pass NULL to set no requirements.

Parameter outputCallback: The callback to be called with decompressed frames. Pass NULL if and only if you will be calling VTDecompressionSessionDecodeFrameWithOutputHandler for decoding frames.

Parameter decompressionSessionOut: Points to a variable to receive the new decompression session.