D3D12_VIDEO_ENCODER_FRAME_TYPE_HEVC enumeration (d3d12video.h)

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Specifies the type of an HEVC video frame.

Syntax

typedef enum D3D12_VIDEO_ENCODER_FRAME_TYPE_HEVC {
  D3D12_VIDEO_ENCODER_FRAME_TYPE_HEVC_I_FRAME,
  D3D12_VIDEO_ENCODER_FRAME_TYPE_HEVC_P_FRAME,
  D3D12_VIDEO_ENCODER_FRAME_TYPE_HEVC_B_FRAME,
  D3D12_VIDEO_ENCODER_FRAME_TYPE_HEVC_IDR_FRAME
} ;

Constants

 
D3D12_VIDEO_ENCODER_FRAME_TYPE_HEVC_I_FRAME
I-Frame. Completely intra-coded frame.
D3D12_VIDEO_ENCODER_FRAME_TYPE_HEVC_P_FRAME
P-Frame. Allows references to past frames.
D3D12_VIDEO_ENCODER_FRAME_TYPE_HEVC_B_FRAME
B-Frame. Allows references to both past and future (in display order) frames.
D3D12_VIDEO_ENCODER_FRAME_TYPE_HEVC_IDR_FRAME
Instantaneous decode refresh frame. A special type of I-frame where no frame after it can reference any frame before it.

Remarks

The following table lists the expected HEVC header frame type for each HEVC frame type value.

Syntax element Expected default value
D3D12_VIDEO_ENCODER_FRAME_TYPE_HEVC_I_FRAME nal_unit_type = CRA_NUT
D3D12_VIDEO_ENCODER_FRAME_TYPE_HEVC_P_FRAME nal_unit_type = TRAIL_R
D3D12_VIDEO_ENCODER_FRAME_TYPE_HEVC_B_FRAME nal_unit_type = TRAIL_R
D3D12_VIDEO_ENCODER_FRAME_TYPE_HEVC_IDR_FRAME nal_unit_type = IDR_W_RADL

If D3D12_VIDEO_ENCODER_CODEC_CONFIGURATION_SUPPORT_HEVC_FLAG_P_FRAMES_IMPLEMENTED_AS_LOW_DELAY_B_FRAMES is set, it informs the caller that when encoding frames with type D3D12_VIDEO_ENCODER_FRAME_TYPE_HEVC_P_FRAME, they will be written as low delay B-Frames in the compressed bitstream. If bit is not set, it informs the caller P frames will be written in the compressed bitstream. Note that When operating under this mode, is the caller's responsibility to code the correct frame type in AUD_NUT and other parts of the HEVC bitstream, taking into account that P frames will be treated as generalized B frames with only references to past frames in POC order.

Requirements

Requirement Value
Minimum supported client Windows Build 22000
Minimum supported server Windows Build 22000
Header d3d12video.h