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AMF VQ Enhancer is a technique for reconstructing high-quality videos from low-quality compressed videos. This document provides a complete description of the AMD Advanced Media Framework (AMF) Video Enhancer Component. This component performs the following functions:
- Removing/reducing the blocking artifacts introduced by AVC/HEVC compression with low bit rate.
- Preserving details.
Video VQ Enhancer accepts input frames stored in AMFSurface objects wrapping DirectX 11/12 textures, Vulkan surfaces, OpenCL surfaces. The output is placed in AMFSurface objects wrapping DirectX 11/12 textures, OpenCL surfaces, Vulkan surfaces, depending on the component configuration.
Include public/include/components/VQEnhancer.h
The AMF VQ Enhancer component should be initialized using the following sequence:
- Create an AMF Context and initialize it for one of the following:
- DirectX 11
- DirectX 12
- Vulkan
- OpenCL
- Configure the VQ Enhancer component by setting the necessary properties using the
AMFPropertyStorage::SetPropertymethod on the VQ Enhancer object. - Call the
VideoEnhancer::Initmethod of the video HQ Scaler object.
The details on compoment setup can be found from the document AMF_API_Reference.pdf
VQ enhancer supports the following input and output formats:
- BRGA
- NV12
- RGBA
- R10G10B10A2
- RGBA_F16
- P010
The output format must be same as the input and the format conversion is not supported. The parameters of the output stream are set using the following properties:
| Name (prefix "AMF_VIDEO_ENHANCER" / "AMF_VE_FCR_") | Type |
|---|---|
| ENGINE_TYPE | AMF_MEMORY_TYPE |
| OUTPUT_SIZE | AMFSize |
| ATTENUATION | Float |
| RADIUS 1 | amf_int64 |
| SPLIT_VIEW | amf_int64 |
Table 1. AMF VQ Enhancer properties of the output stream
Name:
AMF_VIDEO_ENHANCER_ENGINE_TYPE
Values:
AMF_MEMORY_DX11, AMF_MEMORY_DX12, AMF_MEMORY_VULKAN,AMF_MEMORY_OPENCL
Default Value:
AMF_MEMORY_DX11
Description: Specifies the memory type of output surfaces (surfaces are allocated internally by the VQ Enhancer component). The ouput surface type can be different from input surface and this enables sharing a resource with another API using interop. For example, DX11 output can be interoped to OCL, processed in OCL and output will be DX11.
Name:
AMF_VIDEO_ENHANCER_OUTPUT_SIZE
Values: A valid size
Default Value:
N\A
Description: Output image resolution. VQ enhancer will be performed when this property is set.
Name:
AMF_VE_FCR_ATTENUATION
Values:
Float in the range of [0.02, 0.4]
Default Value:
0.1
Description: Control VQEnhancer strength.
Name:
AMF_VE_FCR_RADIUS
Values:
Int in the range of [1, 4]
Default Value:
4
Description: Deprecated. Setting this property has no effect.
Name:
AMF_VE_FCR_SPLIT_VIEW
Values:
0 / 1 (OFF / ON)
Default Value:
0
Description: Experimental. When set, enables a side by side view with processing enabled on one side and disabled on the other side.
Once the VQ enhancer component is successfully initialized, you may start submitting input samples to it. Input samples must be submitted as AMFSurface objects.
At the same time poll for output by calling AMFComponent::QueryOutput on the VQ enhancer object. Polling for output samples can be done either from the same thread or from another thread.
Suspend submission of input samples briefly when AMFComponent::SubmitInput returns AMF_INPUT_FULL. Continue to poll for output samples and process them as they become available.
To terminate the VQ Enhancer component, call the Terminate method, or simply destroy the object. Ensure that the context used to create the VQ Enhancer component still exists during termination.
Footnotes
-
Deprecated. ↩