D3D12DDI_VIDEO_ENCODER_RATE_CONTROL_FLAGS_0080 - NtDoc
Native API online documentation, based on the System Informer
(formerly Process Hacker) phnt
headers
// d3d12umddi.h
typedef enum D3D12DDI_VIDEO_ENCODER_RATE_CONTROL_FLAGS_0080 {
D3D12DDI_VIDEO_ENCODER_RATE_CONTROL_FLAG_0080_NONE = 0x0,
D3D12DDI_VIDEO_ENCODER_RATE_CONTROL_FLAG_0080_ENABLE_DELTA_QP = 0x1,
D3D12DDI_VIDEO_ENCODER_RATE_CONTROL_FLAG_0080_ENABLE_FRAME_ANALYSIS = 0x2,
D3D12DDI_VIDEO_ENCODER_RATE_CONTROL_FLAG_0080_ENABLE_QP_RANGE = 0x4,
D3D12DDI_VIDEO_ENCODER_RATE_CONTROL_FLAG_0080_ENABLE_INITIAL_QP = 0x8,
D3D12DDI_VIDEO_ENCODER_RATE_CONTROL_FLAG_0080_ENABLE_MAX_FRAME_SIZE = 0x10,
D3D12DDI_VIDEO_ENCODER_RATE_CONTROL_FLAG_0080_1_ENABLE_VBV_SIZES = 0x20,
D3D12DDI_VIDEO_ENCODER_RATE_CONTROL_FLAG_0096_ENABLE_EXTENSION1_SUPPORT = 0x40,
D3D12DDI_VIDEO_ENCODER_RATE_CONTROL_FLAG_0096_ENABLE_QUALITY_VS_SPEED = 0x80
} ;
View the official Windows Driver Kit DDI referenceNo description available.
The D3D12DDI_VIDEO_ENCODER_RATE_CONTROL_FLAGS_0080 enumeration specifies the flags for rate control.
D3D12DDI_VIDEO_ENCODER_RATE_CONTROL_FLAG_0080_NONE:0x0No rate control flags.
D3D12DDI_VIDEO_ENCODER_RATE_CONTROL_FLAG_0080_ENABLE_DELTA_QP:0x1If the selected rate control mode is D3D12DDI_VIDEO_ENCODER_RATE_CONTROL_MODE_ABSOLUTE_QP_MAP, this flag has no effect since the QP values in pRateControlQPMap field are used as absolute QP values.
For the other rate control modes, this flag enables pRateControlQPMap to be interpreted as a delta QP map to be used for the current frame encode operation. The values provided in the map are incremented/decremented on top of the QP values decided by the rate control algorithm or the baseline QP constant set in CQP mode.
Using delta QP adjustment along with some active rate control modes might violate bitrate constraints as it explicitly alters the QP values that were selected by the rate control budgeting algorithm.
D3D12DDI_VIDEO_ENCODER_RATE_CONTROL_FLAG_0080_ENABLE_FRAME_ANALYSIS:0x2If support is indicated in D3D12DDI_VIDEO_ENCODER_SUPPORT_FLAGS, this flag enables the rate control algorithm to optimize bitrate usage by selecting QP values based on statistics collected by doing frame analysis on a first pass.
D3D12DDI_VIDEO_ENCODER_RATE_CONTROL_FLAG_0080_ENABLE_QP_RANGE:0x4When set, use the MinQp and MaxQp values as a range for the rate control algorithm.
D3D12DDI_VIDEO_ENCODER_RATE_CONTROL_FLAG_0080_ENABLE_INITIAL_QP:0x8When set, use the InitialQP values as a range for the rate control algorithm.
D3D12DDI_VIDEO_ENCODER_RATE_CONTROL_FLAG_0080_ENABLE_MAX_FRAME_SIZE:0x10When D3D12DDI_VIDEO_ENCODER_SUPPORT_FLAG_0083_0_RATE_CONTROL_MAX_FRAME_SIZE_AVAILABLE is supported, the rate control algorithm should limit the maximum size per frame to the specified parameter in the rate control configuration.
D3D12DDI_VIDEO_ENCODER_RATE_CONTROL_FLAG_0080_1_ENABLE_VBV_SIZES:0x20When set, enable the usage of VBVCapacity and InitialVBVFullness.
D3D12DDI_VIDEO_ENCODER_RATE_CONTROL_FLAG_0096_ENABLE_EXTENSION1_SUPPORT:0x40Requires D3D12DDI_VIDEO_ENCODER_SUPPORT_FLAG_RATE_CONTROL_EXTENSION1_SUPPORT to be set. See Remarks.
D3D12DDI_VIDEO_ENCODER_RATE_CONTROL_FLAG_0096_ENABLE_QUALITY_VS_SPEED:0x80Requires D3D12DDI_VIDEO_ENCODER_SUPPORT_FLAG_RATE_CONTROL_EXTENSION1_SUPPORT and D3D12DDI_VIDEO_ENCODER_SUPPORT_FLAG_RATE_CONTROL_QUALITY_VS_SPEED_AVAILABLE. When enabled, indicates the use of QualityVsSpeed in the rate control structure.
When D3D12DDI_VIDEO_ENCODER_RATE_CONTROL_FLAG_0096_ENABLE_EXTENSION1_SUPPORT is enabled, this indicates that the rate control structures extended for AV1 encoding will be used in D3D12DDI_VIDEO_ENCODER_RATE_CONTROL_CONFIGURATION_PARAMS.pConfiguration_*Xxx*, as per the following table.
| Rate control mode when flag is enabled | D3D12DDI_VIDEO_ENCODER_RATE_CONTROL_CONFIGURATION_PARAMS type | D3D12DDI_VIDEO_ENCODER_RATE_CONTROL_CONFIGURATION_PARAMS DataSize |
|---|---|---|
| D3D12DDI_VIDEO_ENCODER_RATE_CONTROL_MODE_ABSOLUTE_QP_MAP | D3D12DDI_VIDEO_ENCODER_RATE_CONTROL_ABSOLUTE_QP_MAP | sizeof(D3D12DDI_VIDEO_ENCODER_RATE_CONTROL_ABSOLUTE_QP_MAP) |
| D3D12DDI_VIDEO_ENCODER_RATE_CONTROL_MODE_CQP | D3D12DDI_VIDEO_ENCODER_RATE_CONTROL_CQP1 | sizeof(D3D12DDI_VIDEO_ENCODER_RATE_CONTROL_CQP1) |
| D3D12DDI_VIDEO_ENCODER_RATE_CONTROL_MODE_CBR | D3D12DDI_VIDEO_ENCODER_RATE_CONTROL_CBR1 | sizeof(D3D12DDI_VIDEO_ENCODER_RATE_CONTROL_CBR1) |
| D3D12DDI_VIDEO_ENCODER_RATE_CONTROL_MODE_VBR | D3D12DDI_VIDEO_ENCODER_RATE_CONTROL_VBR1 | sizeof(D3D12DDI_VIDEO_ENCODER_RATE_CONTROL_VBR1) |
| D3D12DDI_VIDEO_ENCODER_RATE_CONTROL_MODE_QVBR | D3D12DDI_VIDEO_ENCODER_RATE_CONTROL_QVBR1 | sizeof(D3D12DDI_VIDEO_ENCODER_RATE_CONTROL_QVBR1) |
Otherwise, the legacy structures will be used when disabled, as per the following table.
| Rate control mode when flag is disabled | D3D12DDI_VIDEO_ENCODER_RATE_CONTROL_CONFIGURATION_PARAMS type | D3D12DDI_VIDEO_ENCODER_RATE_CONTROL_CONFIGURATION_PARAMS DataSize |
|---|---|---|
| D3D12DDI_VIDEO_ENCODER_RATE_CONTROL_MODE_ABSOLUTE_QP_MAP | NULL | 0 |
| D3D12DDI_VIDEO_ENCODER_RATE_CONTROL_MODE_CQP | D3D12DDI_VIDEO_ENCODER_RATE_CONTROL_CQP | sizeof(D3D12DDI_VIDEO_ENCODER_RATE_CONTROL_CQP) |
| D3D12DDI_VIDEO_ENCODER_RATE_CONTROL_MODE_CBR | D3D12DDI_VIDEO_ENCODER_RATE_CONTROL_CBR | sizeof(D3D12DDI_VIDEO_ENCODER_RATE_CONTROL_CBR) |
| D3D12DDI_VIDEO_ENCODER_RATE_CONTROL_MODE_VBR | D3D12DDI_VIDEO_ENCODER_RATE_CONTROL_VBR | sizeof(D3D12DDI_VIDEO_ENCODER_RATE_CONTROL_VBR) |
| D3D12DDI_VIDEO_ENCODER_RATE_CONTROL_MODE_QVBR | D3D12DDI_VIDEO_ENCODER_RATE_CONTROL_QVBR | sizeof(D3D12DDI_VIDEO_ENCODER_RATE_CONTROL_QVBR) |
See D3D12 video encoding for general information.
D3D12DDI_VIDEO_ENCODER_RATE_CONTROL_0080_2
D3D12DDI_VIDEO_ENCODER_RATE_CONTROL_CBR_0080
D3D12DDI_VIDEO_ENCODER_RATE_CONTROL_QVBR_0080_2
D3D12DDI_VIDEO_ENCODER_RATE_CONTROL_VBR_0080
D3D12DDI_VIDEO_ENCODER_SUPPORT_FLAGS_0083_0
PFND3D12DDI_VIDEO_ENCODE_FRAME_0082_0