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D3D12_VIDEO_PROCESS_INPUT_STREAM_RATE structure (d3d12video.h)

  • Article

Provides information about the stream rate.

Syntax

typedef struct D3D12_VIDEO_PROCESS_INPUT_STREAM_RATE {
  UINT OutputIndex;
  UINT InputFrameOrField;
} D3D12_VIDEO_PROCESS_INPUT_STREAM_RATE;

Members

OutputIndex

The zero-based index number of the output frame. The OutputIndex member is a zero-based cyclic number that indicates the frame index number of the output. The driver uses this output-index information to perform the video processing in a certain pattern or cycle, especially when the driver performs deinterlacing or frame-rate conversion. For example, with the following output-index pattern, the driver performs the indicated video processing:

  • Progressive format at normal and half rate:
  • OutputInde = 0, 0,...
  • Progressive format at 2/1 custom rate (double frame-rate conversion, OutputFrames=2):
  • OutputInde = 0, 1, 0, 1,...
  • Interlaced format at normal rate:
  • OutputInde = 0, 1, 0, 1,... (0: first field, 1: second field)
  • Interlaced format at half rate:
  • OutputInde = 0, 0,... (for example, first and second fields are blended to one frame)
  • Interlaced at 4/5 custom rate (3:2 inverse telecine, OutputFrames=4):
  • OutputInde = 0, 1, 2, 3, 0, 1, 2, 3,... (0:A, 1:B, 2:C, 3:D film frame)

InputFrameOrField

The zero-based index number of the input frame or field. The InputFrameOrField member is a zero-based number that indicates the frame or the field number of the input surface. For example, with the following input-frame-or-field number, the driver can perform the indicated video processing:

  • Progressive format and interlaced format at normal rate:
    • InputFrameOrField = 0, 1, 2,...
  • Progressive format and interlaced format at half rate:
    • InputFrameOrField = 0, 2, 4,...
  • Interlaced format at 4/5 custom rate (3:2 inverse telecine, OutputFrames=4 and InputFrameOrField=10):
    • InputFrameOrField = 0, 0, 0, 0, 10, 10, 10, 10, 20, 20, 20, 20,...
  • Interlaced format at 4/15 custom rate (8:7 inverse telecine, OutputFrames=2 and InputFrameOrField=15):
    • InputFrameOrField = 0, 0, 15, 15, 30, 30,...

Requirements

Requirement Value
Header d3d12video.h