Add libva specific CodecParam

pkg/codec/vaapi/params.go

@@ -0,0 +1,54 @@
+package vaapi
+
+// ParamVP8 stores VP8 encoding parameters.
+type ParamVP8 struct {
+	Sequence        SequenceParamVP8
+	RateControlMode RateControlMode
+	RateControl     RateControlParam
+}
+
+// SequenceParamVP8 represents VAEncSequenceParameterBufferVP8 and other parameter buffers.
+type SequenceParamVP8 struct {
+	ErrorResilient  bool
+	ClampQindexHigh uint
+	ClampQindexLow  uint
+}
+
+// ParamVP9 represents VAEncSequenceParameterBufferVP9 and other parameter buffers.
+type ParamVP9 struct {
+	RateControlMode RateControlMode
+	RateControl     RateControlParam
+}
+
+// RateControlParam represents VAEncMiscParameterRateControl.
+type RateControlParam struct {
+	// BitsPerSecond is a maximum bit-rate.
+	// This parameter overwrites prop.Codec.BitRate.
+	BitsPerSecond uint
+	// TargetPercentage is a target bit-rate relative to BitsPerSecond.
+	TargetPercentage uint
+	// WindowSize is a rate control window size in milliseconds.
+	WindowSize uint
+	InitialQP  uint
+	MinQP      uint
+	MaxQP      uint
+}
+
+// RateControlMode represents rate control mode.
+// Note that supported mode depends on the codec and acceleration hardware.
+type RateControlMode uint
+
+// List of the RateControlMode.
+const (
+	RateControlCBR            RateControlMode = 0x00000002
+	RateControlVBR            RateControlMode = 0x00000004
+	RateControlVCM            RateControlMode = 0x00000008
+	RateControlCQP            RateControlMode = 0x00000010
+	RateControlVBRConstrained RateControlMode = 0x00000020
+	RateControlICQ            RateControlMode = 0x00000040
+	RateControlMB             RateControlMode = 0x00000080
+	RateControlCFS            RateControlMode = 0x00000100
+	RateControlParallel       RateControlMode = 0x00000200
+	RateControlQVBR           RateControlMode = 0x00000400
+	RateControlAVBR           RateControlMode = 0x00000800
+)