vaapi

Documentation

Overview

Package vaapi implements hardware accelerated codecs. This package requires libva headers and libraries to be built. libva requires supported graphic card and its driver.

Index

• type ParamsVP8
  • func NewVP8Params() (ParamsVP8, error)
  • func (p *ParamsVP8) BuildVideoEncoder(r video.Reader, property prop.Media) (codec.ReadCloser, error)
  • func (p *ParamsVP8) RTPCodec() *codec.RTPCodec
• type ParamsVP9
  • func NewVP9Params() (ParamsVP9, error)
  • func (p *ParamsVP9) BuildVideoEncoder(r video.Reader, property prop.Media) (codec.ReadCloser, error)
  • func (p *ParamsVP9) RTPCodec() *codec.RTPCodec
• type RateControlMode
• type RateControlParam
• type SequenceParamVP8

Types

type ParamsVP8

type ParamsVP8 struct {
	codec.BaseParams
	Sequence        SequenceParamVP8
	RateControlMode RateControlMode
	RateControl     RateControlParam
}

ParamsVP8 stores VP8 encoding parameters.

func NewVP8Params

func NewVP8Params() (ParamsVP8, error)

NewVP8Params returns default parameters of VP8 codec.

func (*ParamsVP8) BuildVideoEncoder

func (p *ParamsVP8) BuildVideoEncoder(r video.Reader, property prop.Media) (codec.ReadCloser, error)

BuildVideoEncoder builds VP8 encoder with given params

func (*ParamsVP8) RTPCodec

func (p *ParamsVP8) RTPCodec() *codec.RTPCodec

RTPCodec represents the codec metadata

type ParamsVP9

type ParamsVP9 struct {
	codec.BaseParams
	RateControlMode RateControlMode
	RateControl     RateControlParam
}

ParamsVP9 represents VAEncSequenceParameterBufferVP9 and other parameter buffers.

func NewVP9Params

func NewVP9Params() (ParamsVP9, error)

NewVP9Params returns default parameters of VP9 codec.

func (*ParamsVP9) BuildVideoEncoder

func (p *ParamsVP9) BuildVideoEncoder(r video.Reader, property prop.Media) (codec.ReadCloser, error)

BuildVideoEncoder builds VP9 encoder with given params

func (*ParamsVP9) RTPCodec

func (p *ParamsVP9) RTPCodec() *codec.RTPCodec

RTPCodec represents the codec metadata

type RateControlMode

type RateControlMode uint

RateControlMode represents rate control mode. Note that supported mode depends on the codec and acceleration hardware.

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
)

List of the RateControlMode.

type RateControlParam

type RateControlParam struct {

	// TargetPercentage is a target bit-rate relative to the maximum bit-rate.
	// BaseParams.BitRate / (TargetPercentage * 0.01) will be the maximum bit-rate.
	TargetPercentage uint
	// WindowSize is a rate control window size in milliseconds.
	WindowSize uint
	InitialQP  uint
	MinQP      uint
	MaxQP      uint
	// contains filtered or unexported fields
}

RateControlParam represents VAEncMiscParameterRateControl.

type SequenceParamVP8

type SequenceParamVP8 struct {
	ErrorResilient  bool
	ClampQindexHigh uint
	ClampQindexLow  uint
}

SequenceParamVP8 represents VAEncSequenceParameterBufferVP8 and other parameter buffers.