v4l2

package module
v0.0.5 Latest Latest
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 Go to latest Published: Apr 2, 2020 License: MIT Imports: 1 Imported by: 0

README

V4L2

V4L2 definitions for Go.

Copyright (c) 2020 Peter Hagelund

This software is licensed under the MIT License

See LICENSE.txt

Installing

Please note: Work in progress, quite incomplete still.

Using

TODO

Documentation

Overview

Package v4l2 provides a pure Go interface for V4L2.

Index

Constants

View Source 
const (
	BufCapSupportsMMap uint32 = 1 << iota
	BufCapSupportsUserPtr
	BufCapSupportsDMABuf
	BufCapSupportsRequests
	BufCapSupportsOrphanedBufs
	BufCapSupportsM2MHoldCaptureBuf
)
View Source 
const (
	CapVideoCapture uint32 = 1 << iota
	CapVideoOutput
	CapVideoOverlay

	CapVBICapture
	CapVBIOutput
	CapSlicedVBICapture
	CapSlicedVBIOutput
	CapRDSCapture
	CapVideoOutputOverlay
	CapHwFreqSeek
	CapRDSOutput
	CapVideoCaptureMPlane
	CapVideoOutputMPlane
	CapVideoM2M
	CapVideoM2MMPlane
	CapTuner
	CapAudio
	CapRadio
	CapModulator
	CapSDRCapture
	CapExtPixFormat
	CapSDROutput
	CapMetaCapture

	CapAsyncIO
	CapStreaming
	CapMetaOutput
	CapTouch

	CapDeviceCaps
)

Device capability flags (https://www.linuxtv.org/downloads/v4l-dvb-apis-new/uapi/v4l/vidioc-querycap.html#device-capabilities).

View Source 
const (
	FrmSizeTypeDiscrete uint32 = iota + 1
	FrmSizeTypeContinuous
	FrmSizeTypeStepwise
)
View Source 
const (
	// InputTypeTuner designates the input as a tuner.
	InputTypeTuner uint32 = iota + 1
	// InputTypeCamera designates the input as a camera.
	InputTypeCamera
	// InputTypeTouch designates the input as a touch device.
	InputTypeTouch
)
View Source 
const (
	// VidIocQueryCap is VIDIOC_QUERYCAP (https://www.linuxtv.org/downloads/v4l-dvb-apis-new/uapi/v4l/vidioc-querycap.html).
	VidIocQueryCap uint32 = 0x80685600
	// VidIocReserved is VIDIOC_RESERVED.
	VidIocReserved = 0x00005601
	// VidIocEnumFmt is (https://www.linuxtv.org/downloads/v4l-dvb-apis-new/uapi/v4l/vidioc-enum-fmt.html).
	VidIocEnumFmt = 0xc0405602
	// VidIocGFmt is VIDIOC_G_FMT (https://www.linuxtv.org/downloads/v4l-dvb-apis-new/uapi/v4l/vidioc-g-fmt.html).
	VidIocGFmt = 0xc0d05604
	// VidIocSFmt is VIDIOC_S_FMT (https://www.linuxtv.org/downloads/v4l-dvb-apis-new/uapi/v4l/vidioc-g-fmt.html).
	VidIocSFmt = 0xc0cc5605
	// VidIocReqBufs is VIDIOC_REQBUFS (https://www.linuxtv.org/downloads/v4l-dvb-apis-new/uapi/v4l/vidioc-reqbufs.html).
	VidIocReqBufs = 0xc0145608
	// VidIocQueryBuf is VIDIOC_QUERYBUF (https://www.linuxtv.org/downloads/v4l-dvb-apis-new/uapi/v4l/vidioc-querybuf.html).
	VidIocQueryBuf = 0xc0445609
	// VidIocGFBuf is VIDIOC_G_FBUF (https://www.linuxtv.org/downloads/v4l-dvb-apis-new/uapi/v4l/vidioc-g-fbuf.html).
	VidIocGFBuf = 0x8030560a
	// VidIocSFBuf is VIDIOC_S_FBUF (https://www.linuxtv.org/downloads/v4l-dvb-apis-new/uapi/v4l/vidioc-g-fbuf.html).
	VidIocSFBuf = 0x4030560b
	// VidIocOverlay is VIDIOC_OVERLAY (https://www.linuxtv.org/downloads/v4l-dvb-apis-new/uapi/v4l/vidioc-overlay.html).
	VidIocOverlay = 0x4004560e
	// VidIocQBuf is VIDIOC_QBUF (https://www.linuxtv.org/downloads/v4l-dvb-apis-new/uapi/v4l/vidioc-qbuf.html).
	VidIocQBuf = 0xc044560f
	// VidIocExpBuf is VIDIOC_EXPBUF (https://www.linuxtv.org/downloads/v4l-dvb-apis-new/uapi/v4l/vidioc-expbuf.html).
	VidIocExpBuf = 0xc0405610
	// VidIocDQBuf is VIDIOC_DQBUF (https://www.linuxtv.org/downloads/v4l-dvb-apis-new/uapi/v4l/vidioc-qbuf.html).
	VidIocDQBuf = 0xc0445611
	// VidIocStreamOn is VIDIOC_STREAMON (https://www.linuxtv.org/downloads/v4l-dvb-apis-new/uapi/v4l/vidioc-streamon.html).
	VidIocStreamOn = 0x40045612
	// VidIocStreamOff is VIDIOC_STREAMOFF (https://www.linuxtv.org/downloads/v4l-dvb-apis-new/uapi/v4l/vidioc-streamon.html).
	VidIocStreamOff = 0x40045613
	// VidIocGParm is VIDIOC_G_PARM (https://www.linuxtv.org/downloads/v4l-dvb-apis-new/uapi/v4l/vidioc-g-parm.html).
	VidIocGParm = 0xc0cc5615
	// VidIocSParm is VIDIOC_S_PARM (https://www.linuxtv.org/downloads/v4l-dvb-apis-new/uapi/v4l/vidioc-g-parm.html).
	VidIocSParm = 0xc0cc5616
	// VidIocGStd is VIDIOC_G_STD (https://www.linuxtv.org/downloads/v4l-dvb-apis-new/uapi/v4l/vidioc-g-std.html).
	VidIocGStd = 0x80085617
	// VidIocSStd is VIDIOC_S_STD (https://www.linuxtv.org/downloads/v4l-dvb-apis-new/uapi/v4l/vidioc-g-std.html).
	VidIocSStd = 0x40085618
	// VidIocEnumStd is VIDIOC_ENUMSTD (https://www.linuxtv.org/downloads/v4l-dvb-apis-new/uapi/v4l/vidioc-enumstd.html).
	VidIocEnumStd = 0xc0485619
	// VidIocEnumInput is VIDIOC_ENUMINPUT (https://www.linuxtv.org/downloads/v4l-dvb-apis-new/uapi/v4l/vidioc-enuminput.html).
	VidIocEnumInput = 0xc050561a
	// VidIocGCtrl is VIDIOC_G_CTRL (https://www.linuxtv.org/downloads/v4l-dvb-apis-new/uapi/v4l/vidioc-g-ctrl.html).
	VidIocGCtrl = 0xc008561b
	// VidIocSCtrl is VIDIOC_S_CTRL (https://www.linuxtv.org/downloads/v4l-dvb-apis-new/uapi/v4l/vidioc-g-ctrl.html).
	VidIocSCtrl = 0xc008561c
	// VidIocGTuner is VIDIOC_G_TUNER (https://www.linuxtv.org/downloads/v4l-dvb-apis-new/uapi/v4l/vidioc-g-tuner.html).
	VidIocGTuner = 0xc054561d
	// VidIocSTuner is VIDIOC_S_TUNER (https://www.linuxtv.org/downloads/v4l-dvb-apis-new/uapi/v4l/vidioc-g-tuner.html).
	VidIocSTuner = 0x4054561e
	// VidIocGAudio is VIDIOC_G_AUDIO (https://www.linuxtv.org/downloads/v4l-dvb-apis-new/uapi/v4l/vidioc-g-audio.html).
	VidIocGAudio = 0x80345621
	// VidIocSAudio is VIDIOC_S_AUDIO (https://www.linuxtv.org/downloads/v4l-dvb-apis-new/uapi/v4l/vidioc-g-audio.html).
	VidIocSAudio = 0x40345622
	// VidIocQueryCtrl is VIDIOC_QUERYCTRL (https://www.linuxtv.org/downloads/v4l-dvb-apis-new/uapi/v4l/vidioc-queryctrl.html).
	VidIocQueryCtrl = 0xc0445624
	// VidIocQueryMenu is VIDIOC_QUERYMENU (https://www.linuxtv.org/downloads/v4l-dvb-apis-new/uapi/v4l/vidioc-queryctrl.html)
	VidIocQueryMenu = 0xc02c5625
	// VidIocGInput is VIDIOC_G_INPUT (https://www.linuxtv.org/downloads/v4l-dvb-apis-new/uapi/v4l/vidioc-g-input.html).
	VidIocGInput = 0x80045626
	// VidIocSInput is VIDIOC_S_INPUT (https://www.linuxtv.org/downloads/v4l-dvb-apis-new/uapi/v4l/vidioc-g-input.html).
	VidIocSInput = 0xc0045627
	// VidIocGEDID is VIDIOC_G_EDID (https://www.linuxtv.org/downloads/v4l-dvb-apis-new/uapi/v4l/vidioc-g-edid.html).
	VidIocGEDID = 0xc0285628
	// VidIocSEDID is VIDIOC_S_EDID (https://www.linuxtv.org/downloads/v4l-dvb-apis-new/uapi/v4l/vidioc-g-edid.html).
	VidIocSEDID = 0xc0285629
	// VidIocGOutput is VIDIOC_G_OUTPUT (https://www.linuxtv.org/downloads/v4l-dvb-apis-new/uapi/v4l/vidioc-g-output.html).
	VidIocGOutput = 0x8004562e
	// VidIocSOutput is VIDIOC_S_OUTPUT (https://www.linuxtv.org/downloads/v4l-dvb-apis-new/uapi/v4l/vidioc-g-output.html).
	VidIocSOutput = 0xc004562f
	// VidIocEnumOutput is VIDIOC_ENUMOUTPUT (https://www.linuxtv.org/downloads/v4l-dvb-apis-new/uapi/v4l/vidioc-enumoutput.html).
	VidIocEnumOutput = 0xc0485630
	// VidIocGAudOut is VIDIOC_G_AUDOUT (https://www.linuxtv.org/downloads/v4l-dvb-apis-new/uapi/v4l/vidioc-g-audioout.html).
	VidIocGAudOut = 0x80345631
	// VidIocSAudOut is VIDIOC_S_AUDOUT (https://www.linuxtv.org/downloads/v4l-dvb-apis-new/uapi/v4l/vidioc-g-audioout.html).
	VidIocSAudOut = 0x40345632
	// VidIocGModulator is VIDIOC_G_MODULATOR (https://www.linuxtv.org/downloads/v4l-dvb-apis-new/uapi/v4l/vidioc-g-modulator.html).
	VidIocGModulator = 0xc0445636
	// VidIocSModulator is VIDIOC_S_MODULATOR (https://www.linuxtv.org/downloads/v4l-dvb-apis-new/uapi/v4l/vidioc-g-modulator.html).
	VidIocSModulator = 0x40445637
	// VidIocGFrequency is VIDIOC_G_FREQUENCY (https://www.linuxtv.org/downloads/v4l-dvb-apis-new/uapi/v4l/vidioc-g-frequency.html).
	VidIocGFrequency = 0xc02c5638
	// VidIocSFrequency is VIDIOC_S_FREQUENCY (https://www.linuxtv.org/downloads/v4l-dvb-apis-new/uapi/v4l/vidioc-g-frequency.html).
	VidIocSFrequency = 0x402c5639
	// VidIocCropCap is VIDIOC_CROPCAP (https://www.linuxtv.org/downloads/v4l-dvb-apis-new/uapi/v4l/vidioc-cropcap.html).
	VidIocCropCap = 0xc02c563a
	// VidIocGCrop is VIDIOC_G_CROP (https://www.linuxtv.org/downloads/v4l-dvb-apis-new/uapi/v4l/vidioc-g-crop.html).
	VidIocGCrop = 0xc014563b
	// VidIocSCrop is VIDIOC_S_CROP (https://www.linuxtv.org/downloads/v4l-dvb-apis-new/uapi/v4l/vidioc-g-crop.html).
	VidIocSCrop = 0x4014563c
	// VidIocGJpegComp is VIDIOC_G_JPEGCOMP (https://www.linuxtv.org/downloads/v4l-dvb-apis-new/uapi/v4l/vidioc-g-jpegcomp.html).
	VidIocGJpegComp = 0x808c563d
	// VidIocSJpegComp is VIDIOC_S_JPEGCOMP (https://www.linuxtv.org/downloads/v4l-dvb-apis-new/uapi/v4l/vidioc-g-jpegcomp.html).
	VidIocSJpegComp = 0x408c563e
	// VidIocQueryStd is VIDIOC_QUERYSTD (https://www.linuxtv.org/downloads/v4l-dvb-apis-new/uapi/v4l/vidioc-querystd.html).
	VidIocQueryStd = 0x8008563f
	// VidIocTryFmt is VIDIOC_TRY_FMT (https://www.linuxtv.org/downloads/v4l-dvb-apis-new/uapi/v4l/vidioc-g-fmt.html).
	VidIocTryFmt = 0xc0d05640
	// VidIocEnumAudio is VIDIOC_ENUMAUDIO (https://www.linuxtv.org/downloads/v4l-dvb-apis-new/uapi/v4l/vidioc-enumaudio.html).
	VidIocEnumAudio = 0xc0345641
	// VidIocEnumAudOut is VIDIOC_ENUMAUDOUT (https://www.linuxtv.org/downloads/v4l-dvb-apis-new/uapi/v4l/vidioc-enumaudioout.html).
	VidIocEnumAudOut = 0xc0345642
	// VidIocGPriority is VIDIOC_G_PRIORITY (https://www.linuxtv.org/downloads/v4l-dvb-apis-new/uapi/v4l/vidioc-g-priority.html).
	VidIocGPriority = 0x80045643
	// VidIocSPriority is VIDIOC_S_PRIORITY (https://www.linuxtv.org/downloads/v4l-dvb-apis-new/uapi/v4l/vidioc-g-priority.html).
	VidIocSPriority = 0x40045644
	// VidIocGSlicedVBICap is VIDIOC_G_SLICED_VBI_CAP (https://www.linuxtv.org/downloads/v4l-dvb-apis-new/uapi/v4l/vidioc-g-sliced-vbi-cap.html).
	VidIocGSlicedVBICap = 0xc0745645
	// VidIocLogStatus is VIDIOC_LOG_STATUS (https://www.linuxtv.org/downloads/v4l-dvb-apis-new/uapi/v4l/vidioc-log-status.html).
	VidIocLogStatus = 0x00005646
	// VidIocGExtCtrls is VIDIOC_G_EXT_CTRLS (https://www.linuxtv.org/downloads/v4l-dvb-apis-new/uapi/v4l/vidioc-g-ext-ctrls.html).
	VidIocGExtCtrls = 0xc0205647
	// VidIocSExtCtrls is VIDIOC_S_EXT_CTRLS (https://www.linuxtv.org/downloads/v4l-dvb-apis-new/uapi/v4l/vidioc-g-ext-ctrls.html).
	VidIocSExtCtrls = 0xc0205648
	// VidIocTryExtCtrls is VIDIOC_TRY_EXT_CTRLS (https://www.linuxtv.org/downloads/v4l-dvb-apis-new/uapi/v4l/vidioc-g-ext-ctrls.html).
	VidIocTryExtCtrls = 0xc0205649
	// VidIocEnumFrameSizes is VIDIOC_ENUM_FRAMESIZES (https://www.linuxtv.org/downloads/v4l-dvb-apis-new/uapi/v4l/vidioc-enum-framesizes.html).
	VidIocEnumFrameSizes = 0xc02c564a
	// VidIocEnumFrameIntervals is VIDIOC_ENUM_FRAMEINTERVALS (https://www.linuxtv.org/downloads/v4l-dvb-apis-new/uapi/v4l/vidioc-enum-frameintervals.html).
	VidIocEnumFrameIntervals = 0xc034564b
	// VidIocGEncIndex is VIDIOC_G_ENC_INDEX (https://www.linuxtv.org/downloads/v4l-dvb-apis-new/uapi/v4l/vidioc-g-enc-index.html).
	VidIocGEncIndex = 0x8818564c
	// VidIocEncoderCmd is VIDIOC_ENCODER_CMD (https://www.linuxtv.org/downloads/v4l-dvb-apis-new/uapi/v4l/vidioc-encoder-cmd.html).
	VidIocEncoderCmd = 0xc028564d
	// VidIocTryEncoderCmd is VIDIOC_TRY_ENCODER_CMD (https://www.linuxtv.org/downloads/v4l-dvb-apis-new/uapi/v4l/vidioc-encoder-cmd.html).
	VidIocTryEncoderCmd = 0xc028564e
)
View Source 
const (
	AudModeAVL = 1 << iota
)

Audio mode flags (https://www.linuxtv.org/downloads/v4l-dvb-apis-new/uapi/v4l/vidioc-g-audio.html#audio-mode).

Variables

This section is empty.

Functions

func BytesToString 

func BytesToString(b []byte) string

BytesToString converts a low-level, null-terminated C-string to a string.

Types

type AudCap added in v0.0.5 

type AudCap uint32

AudCap is the audio capability type. 

const (
	AudCapStereo AudCap = 1 << iota
	AudCapAVL
)

Audio capability flags (https://www.linuxtv.org/downloads/v4l-dvb-apis-new/uapi/v4l/vidioc-g-audio.html#audio-capability).

type AudMode added in v0.0.5 

type AudMode uint32

AudMode is the audio mode type.

type Audio 

type Audio struct {
	Index      uint32
	Name       [32]byte
	Capability AudCap
	Mode       AudMode
	Reserved   [2]uint32
}

Audio is v4l2_audio (https://www.linuxtv.org/downloads/v4l-dvb-apis-new/uapi/v4l/vidioc-g-audio.html#c.v4l2_audio).

type BufFlag added in v0.0.5 

type BufFlag uint32

BufFlag is the buffer flag type. 

const (
	BufFlagMapped BufFlag = 1 << iota
	BufFlagQueued
	BufFlagDone
	BufFlagKeyFrame
	BufFlagPFrame
	BufFlagBFrame
	BufFlagError
	BufFlagInRequest
	BufFlagTimecode
	BufFlagM2MHoldCaptureBuf
	BufFlagPrepared
	BufFlagNoCacheInvalidate
	BufFlagNoCacheClean
	BufFlagTimestampMonotonic
	BufFlagTimestampCopy

	BufFlagTstampSOE
	BufFlagTstampSrcEOF  BufFlag = 0x00000000
	BufFlagTimestampMask BufFlag = 0x0000e000
	BufFlagTstampSrcMask BufFlag = 0x00070000
	BufFlagLast          BufFlag = 0x00100000
	BufFlagRequestFD     BufFlag = 0x00800000
)

Buffer flags (https://www.linuxtv.org/downloads/v4l-dvb-apis-new/uapi/v4l/buffer.html#buffer-flags).

type BufType added in v0.0.5 

type BufType uint32

BufType is the buffer type type. 

const (
	BufTypeVideoCapture BufType = iota + 1
	BufTypeVideoOutput
	BufTypeVideoOverlay
	BufTypeVBICapture
	BufTypeVBIOutput
	BufTypeSlicedVBICapture
	BufTypeSlicedVBIOutput
	BufTypeVideoOutputOverlay
	BufTypeVideCaptureMPlane
	BufTypeVideOutputMPlane
	BufTypeSDRCapture
	BufTypeSDROutput
	BufTypeMetaCapture
	BufTypeMetaOutput
)

Buffer types (https://www.linuxtv.org/downloads/v4l-dvb-apis-new/uapi/v4l/buffer.html#c.v4l2_buf_type).

type Buffer 

type Buffer struct {
	Index     uint32
	Type      BufType
	BytesUsed uint32
	Flags     BufFlag
	Field     Field
	Timestamp syscall.Timeval
	Timecode  Timecode
	Sequence  uint32
	Memory    Memory
	M         uint32 // Union - Note: might differ between 32-bit and 64-bit systems. Investigate.
	Length    uint32
	Reserved2 uint32
	RequestFD uint32
}

Buffer is v4l2_buffer (https://www.linuxtv.org/downloads/v4l-dvb-apis-new/uapi/v4l/buffer.html#c.v4l2_buffer).

type Cap added in v0.0.5 

type Cap uint32

Cap is the device capability type.

type Capability added in v0.0.5 

type Capability struct {
	Driver       [16]byte
	Card         [32]byte
	BusInfo      [32]byte
	Version      uint32
	Capabilities Cap
	DeviceCaps   Cap
	Reserved     [3]uint32
}

Capability is v4l2_capability (https://www.linuxtv.org/downloads/v4l-dvb-apis-new/uapi/v4l/vidioc-querycap.html#c.v4l2_capability).

type CtrlFwhtparams 

type CtrlFwhtparams struct {
	BackwardRefTS uint64
	Version       uint32
	Width         uint32
	Height        uint32
	Flags         uint32
	ColorSpace    uint32
	XferFunc      uint32
	YCbCrEnc      uint32
	Quantization  uint32
}

type CtrlH264DecodeParams 

type CtrlH264DecodeParams struct {
	DPD                 [16]H264DPDEntry
	NumSlices           uint16
	NALRefIDC           uint16
	TopFieldOrderCnt    uint32
	BottomFieldOrderCnt uint32
	Flags               uint32
}

type CtrlHevcPps 

type CtrlHevcPps struct {
	NumExtraSliceHeaderBits      uint8
	InitQpMinus26                int8
	DiffCuQpDeltaDepth           uint8
	PpsCbQpOffset                int8
	PpsCrQpOffset                int8
	NumTileColumnsMinus1         uint8
	NumTileRowsMinus1            uint8
	ColumnWidthMinus1            [20]uint8
	RowHeightMinus1              [22]uint8
	PpsBetaOffsetDiv2            int8
	PpsTcOffsetDiv2              int8
	Log2ParallelMergeLevelMinus2 uint8
	Padding                      [4]uint8
	Flags                        uint64
}

type CtrlHevcSps 

type CtrlHevcSps struct {
	PicWidthInLumaSamples                uint16
	PicHeightInLumaSamples               uint16
	BitDepthLumaMinus8                   uint8
	BitDepthChromaMinus8                 uint8
	Log2MaxPicOrderCntLSBMinus4          uint8
	SpsMaxDecPicBufferingMinus1          uint8
	SpsMaxNumReorderPics                 uint8
	SpsMaxLatencyIncreasePlus1           uint8
	Log2MinLumaCodingBlockSizeMinus3     uint8
	Log2DiffMaxMinLumaCodingBlockSize    uint8
	Log2MinLumaTransformBlockSizeMinus2  uint8
	Log2DiffMaxMinLumaTransformBlockSize uint8
	MaxTransformHierarchyDepthInter      uint8
	MaxTransformHierarchyDepthIntra      uint8
	PCMSampleBitDepthLumaMinus1          uint8
	PCMSampleBitDepthChromaMinus1        uint8
	Log2MinPCMLumaCodingBlockSizeMinus3  uint8
	Log2DiffMaxMinPCMLumaCodingBlockSize uint8
	NumShortTermRefPicSets               uint8
	NumLongTermRefPicsSps                uint8
	ChromaFormatIDC                      uint8
	Flags                                uint64
}

type CtrlMpeg2Quantization 

type CtrlMpeg2Quantization struct {
	LoadIntraQuantiserMatrix          uint8
	LoadNonIntraQuantiserMatrix       uint8
	LoadChromaIntraQuantiserMatrix    uint8
	LoadChromaNonIntraQuantiserMatrix uint8
	IntraQuantiserMatrix              [64]uint8
	NonIntraQuantiserMatrix           [64]uint8
	ChromaIntraQuantiserMatrix        [64]uint8
	ChromaNonIntraQuantiserMatrix     [64]uint8
}

type CtrlMpeg2SliceParams 

type CtrlMpeg2SliceParams struct {
	BitSize            uint32
	DataBitOffset      uint32
	Sequence           Mpeg2Sequence
	Picture            Mpeg2Picture
	ForwardRefTS       uint64
	QuantiserScaleCode uint32
}

type CtrlVP8FrameHeader 

type CtrlVP8FrameHeader struct {
	SegmentHeader         VP8SegmentHeader
	LoopfilterHeader      VP8LoopfilterHeader
	QuantHeader           VP8QuantizationHeader
	EntropyHeader         VP8EntropyHeader
	CoderState            VP8EntropyCoderState
	Width                 uint16
	Height                uint16
	HorizontalScale       uint8
	VerticalScalingFactor uint8
	Version               uint8
	PropSkipFalse         uint8
	PropIntra             uint8
	PropLast              uint8
	PropGF                uint8
	NumDCTParts           uint8
	FirstPartSize         uint32
	FirstPartHeaderBits   uint32
	DCTPartSize           [8]uint32
	LastFrameTS           uint64
	GoldenFrameTS         uint64
	AltFrameTS            uint64
	Flags                 uint64
}

type Field added in v0.0.5 

type Field uint32

Field is the field type. 

const (
	FieldAny Field = iota
	FieldNone
	FieldTop
	FieldBottom
	FieldInterlaced
	FieldSeqTB
	FieldSeqBT
	FieldAlternate
	FieldInterlacedTB
	FieldInterlacedBT
)

Field types (https://www.linuxtv.org/downloads/v4l-dvb-apis-new/uapi/v4l/field-order.html#c.v4l2_field).

type FmtDesc 

type FmtDesc struct {
	Index       uint32
	Type        BufType
	Flags       FmtFlag
	Description [32]byte
	PixFormat   PixFmt
	Reserved    [4]uint32
}

FmtDesc is v4l2_fmtdesc (https://www.linuxtv.org/downloads/v4l-dvb-apis-new/uapi/v4l/vidioc-enum-fmt.html#c.v4l2_fmtdesc).

type FmtFlag added in v0.0.5 

type FmtFlag uint32

FmtFlag is the format flag type. 

const (
	FmtFlagCompressed FmtFlag = 1 << iota
	FmtFlagEmulated
	FmtFlagContinuousByteStream
	FmtFlagDynResolution
)

Format flags (https://www.linuxtv.org/downloads/v4l-dvb-apis-new/uapi/v4l/vidioc-enum-fmt.html#fmtdesc-flags).

type Format 

type Format struct {
	Type    uint32
	RawData [256]byte
}

Format is an encapsulation of the various formats.

type FrameSizeDiscrete 

type FrameSizeDiscrete struct {
	Width  uint32
	Height uint32
}

FrameSizeDiscrete is an encapsulation of a discrete frame size.

type FrameSizeEnum 

type FrameSizeEnum struct {
	Index     uint32
	PixFormat PixFmt
	Type      uint32
	Stepwise  FrameSizeStepwise // Union with FrameSizeDiscrete
	Reserved  [2]uint32
}

FrameSizeEnum is an encapsulation of frame size information.

type FrameSizeStepwise 

type FrameSizeStepwise struct {
	MinWidth   uint32
	MaxWidth   uint32
	StepWidth  uint32
	MinHeight  uint32
	MaxHeight  uint32
	StepHeight uint32
}

FrameSizeStepwise is an encapsulation of valid frame sizes in steps from min to max.

type Frequency 

type Frequency struct {
	Tuner     uint32
	Type      uint32
	Frequency uint32
	Reserved  [4]uint32
}

Frequency is an encapsulation of a set of frquency attributes.

type H264DPDEntry 

type H264DPDEntry struct {
	ReferenceTS         uint64
	FrameNum            uint16
	PicNum              uint16
	TopFieldOrderCnt    int32
	BottomFieldOrderCnt int32
	Flags               uint32
}

type H264PredWeightTable 

type H264PredWeightTable struct {
	LumaLog2WeightDenom   uint16
	ChromaLog2WeightDenom uint16
	Weightfactors         [2]H264WeightFactors
}

type H264WeightFactors 

type H264WeightFactors struct {
	LumaWeight   [32]int16
	LumaOffset   [32]int16
	ChromaWeight [32]int16
	ChromaOffset [32]int16
}

type Input 

type Input struct {
	Index        uint32
	Name         [32]byte
	Type         uint32
	AudioSet     uint32
	Tuner        uint32
	Standard     StdID
	Status       uint32
	Capabilities uint32
	Reserved     [3]uint32
}

Input is an encapsulation of a set of input attributes.

type Memory added in v0.0.5 

type Memory uint32

Memory is the memory type. 

const (
	MemoryMMap Memory = iota + 1
	MemoryUserPtr
	MemoryOverlay
	MemoryDMABuf
)

Memory types (https://www.linuxtv.org/downloads/v4l-dvb-apis-new/uapi/v4l/buffer.html#c.v4l2_memory).

type Modulator 

type Modulator struct {
	Index      uint32
	Name       [32]byte
	Capability uint32
	RangeLow   uint32
	RangeHigh  uint32
	TXSubChans uint32
	Type       uint32
	Reserved   [3]uint32
}

Modulator is an encapsulation of a set of modulator attributes.

type Mpeg2Picture 

type Mpeg2Picture struct {
	PictureCodingType        uint8
	FCode                    [2][2]uint8
	IntraDCPrecision         uint8
	PictureStructure         uint8
	TopFieldFirst            uint8
	FramePredFrameDCT        uint8
	ConcealmentMotionVectors uint8
	QScaleType               uint8
	IntraVLCFormat           uint8
	AlternateScan            uint8
	RepeatFirstField         uint8
	ProgressiveFrame         uint16
}

type Mpeg2Sequence 

type Mpeg2Sequence struct {
	HorizontalSize            uint16
	VerticalSize              uint16
	VBVBufferSize             uint32
	ProfileAndLevelIndication uint16
	ProgressiveSequence       uint8
	ChromaFormat              uint8
}

type Output 

type Output struct {
	Index        uint32
	Name         [32]byte
	Type         uint32
	AudioSet     uint32
	Modulator    uint32
	Standard     StdID
	Capabilities uint32
	Reserved     [3]uint32
}

Output is an encapsulation of a set of output attributes.

type PixFmt added in v0.0.5 

type PixFmt uint32

PixFmt is the pixel format type. 

const (
	PixFmtRGB332 PixFmt = 'R'<<24 | 'G'<<16 | 'B'<<8 | '1'

	PixFmtGrey PixFmt = 'G'<<24 | 'R'<<16 | 'E'<<8 | 'Y'

	PxFmtDV PixFmt = 'd'<<24 | 'v'<<16 | 's'<<8 | 'd'
)

Pixel formats (https://www.linuxtv.org/downloads/v4l-dvb-apis-new/uapi/v4l/pixfmt-rgb.html#pixfmt-rgb https://www.linuxtv.org/downloads/v4l-dvb-apis-new/uapi/v4l/yuv-formats.html#yuv-formats https://www.linuxtv.org/downloads/v4l-dvb-apis-new/uapi/v4l/pixfmt-reserved.html#reserved-formats).

type PixFormat 

type PixFormat struct {
	Width        uint32
	Height       uint32
	PixFormat    PixFmt
	Field        uint32
	BytesPerLine uint32
	SizeImage    uint32
	ColorSpace   uint32
	Priv         uint32
	Flags        uint32
	Enc          uint32 // Anonymous union of YCbCr and HSV
	Quantization uint32
	XferFunc     uint32
}

PixFormat is an encapsulation of a single-planar format.

type PixFormatMPlane 

type PixFormatMPlane struct {
	Width        uint32
	Height       uint32
	PixFormat    PixFmt
	Field        uint32
	ColorSpace   uint32
	PlaneFmt     [8]PlanePixFormat
	NumPlanes    uint8
	Flags        uint8
	Enc          uint8 // Anonymous union of YCbCr and HSV
	Quantization uint8
	XferFunc     uint8
	Reserved     [7]uint8
}

PixFormatMPlane is an encapsulation of a multi-planar format.

type Plane 

type Plane struct {
	BytesUsed  uint32
	Length     uint32
	M          uint32 // Union
	DataOffset uint32
	Reserved   [11]uint32
}

Plane is an encapsulation of a single plane.

type PlanePixFormat 

type PlanePixFormat struct {
	SizeImage    uint32
	BytesPerLine uint32
	Reserved     [6]uint16
}

PlanePixFormat is an encapsulation of a plane format.

type QueryCtrl 

type QueryCtrl struct {
	ID           uint32
	Type         uint32
	Name         [32]byte
	Minimum      int32
	Maximum      int32
	Step         int32
	DefaultValue int32
	Flags        uint32
	Rserved      [2]uint32
}

QueryCtrl is an encapsulation of a control.

type QueryExtCtrl 

type QueryExtCtrl struct {
	ID           uint32
	Type         uint32
	Name         [32]byte
	Minimum      int32
	Maximum      int32
	Step         int32
	DefaultValue int32
	Flags        uint32
	ElemSize     uint32
	Elems        uint32
	NrOfDims     uint32
	Dims         [4]uint32
	Rserved      [32]uint32
}

QueryExtCtrl is an encapsulation of an extended control.

type QueryMenu 

type QueryMenu struct {
	ID    uint32
	Index uint32
	Name  [32]byte
	// Value int64 unioned with Name
	Reserved uint32
}

QueryMenu is an encapsulation of a menu.

type RequestBuffers 

type RequestBuffers struct {
	Count        uint32
	Type         uint32
	Memory       uint32
	Capabilities uint32
	Reserved     [1]uint32
}

RequestBuffers is an encapsulates a buffer request.

type StdID 

type StdID uint64

StdID is the standard ID type.

type TcFlag added in v0.0.5 

type TcFlag uint32

TcFlag is the timecode flag type. 

const (
	TcFlagUserDefined TcFlag = 1 << iota
	TcFlagDropFrame

	TcUserBits8BitChars
	TcUserBitsField       TcFlag = 0x0000000C
	TcUserBitsUserDefined TcFlag = 0x00000000
)

Timecode flags (https://www.linuxtv.org/downloads/v4l-dvb-apis-new/uapi/v4l/buffer.html#timecode-flags).

type TcType added in v0.0.5 

type TcType uint32

TcType is the timecode type type. 

const (
	TcType24Fps TcType = iota + 1
	TcType25Fps
	TcType30Fps
	TcType50Fps
	TcType60Fps
)

Timecode types (https://www.linuxtv.org/downloads/v4l-dvb-apis-new/uapi/v4l/buffer.html#timecode-type).

type Timecode 

type Timecode struct {
	Type     TcType
	Flags    TcFlag
	Frames   uint8
	Seconds  uint8
	Minutes  uint8
	Hours    uint8
	UserBits [4]uint8
}

Timecode is v4l2_timecode (https://www.linuxtv.org/downloads/v4l-dvb-apis-new/uapi/v4l/buffer.html#c.v4l2_timecode).

type Tuner 

type Tuner struct {
	Index      uint32
	Name       [32]byte
	Type       uint32
	Capability uint32
	RangeLow   uint32
	RangeHigh  uint32
	RXSubChans uint32
	AudMode    uint32
	Signal     uint32
	AFC        int32
	Reserved   [4]uint32
}

Tuner is an encapsulation of a set of tuner attributes.

type VP8EntropyCoderState 

type VP8EntropyCoderState struct {
	Range    uint8
	Value    uint8
	BitCount uint8
	Padding  uint8
}

type VP8EntropyHeader 

type VP8EntropyHeader struct {
	CoeffProbs  [4][8][3][11]uint8
	YModeProbs  [4]uint8
	UVModeProbs [4]uint8
	MVProb      [2][19]uint8
	Padding     [3]uint8
}

type VP8LoopfilterHeader 

type VP8LoopfilterHeader struct {
	RefFrmDelta    [4]int8
	MBModeDelta    [4]int8
	SharpnessLevel uint8
	Padding        uint16
	Flags          uint32
}

type VP8QuantizationHeader 

type VP8QuantizationHeader struct {
	YACQi     uint8
	YDCDelta  int8
	Y2DCDelta int8
	Y2ACDelta int8
	UVDCDelta int8
	UVACDelta int8
	Padding   uint16
}

type VP8SegmentHeader 

type VP8SegmentHeader struct {
	QuantUpdate  [4]int8
	LFUpdate     [4]int8
	SegmentProbs [3]uint8
	Padding      uint8
	Flags        uint32
}

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