add riscv64 platform for v4l2 package

pkg/v4l2/device/videodev2_riscv64.go

@@ -0,0 +1,148 @@
+const (
+	VIDIOC_QUERYCAP = 0x80685600
+	VIDIOC_ENUM_FMT = 0xc0405602
+	VIDIOC_G_FMT = 0xc0d05604
+	VIDIOC_S_FMT = 0xc0d05605
+	VIDIOC_REQBUFS = 0xc0145608
+	VIDIOC_QUERYBUF = 0xc0585609
+
+	VIDIOC_QBUF = 0xc058560f
+	VIDIOC_DQBUF = 0xc0585611
+	VIDIOC_STREAMON = 0x40045612
+	VIDIOC_STREAMOFF = 0x40045613
+	VIDIOC_G_PARM = 0xc0cc5615
+	VIDIOC_S_PARM = 0xc0cc5616
+
+	VIDIOC_ENUM_FRAMESIZES = 0xc02c564a
+	VIDIOC_ENUM_FRAMEINTERVALS = 0xc034564b
+)
+
+const (
+	V4L2_BUF_TYPE_VIDEO_CAPTURE = 1
+	V4L2_COLORSPACE_DEFAULT = 0
+	V4L2_FIELD_NONE = 1
+	V4L2_FRMIVAL_TYPE_DISCRETE = 1
+	V4L2_FRMSIZE_TYPE_DISCRETE = 1
+	V4L2_MEMORY_MMAP = 1
+)
+
+type v4l2_capability struct { // size 104
+	driver [16]byte // offset 0, size 16
+	card [32]byte // offset 16, size 32
+	bus_info [32]byte // offset 48, size 32
+	version uint32 // offset 80, size 4
+	capabilities uint32 // offset 84, size 4
+	device_caps uint32 // offset 88, size 4
+	reserved [3]uint32 // offset 92, size 12
+}
+
+type v4l2_format struct { // size 208
+	typ uint32 // offset 0, size 4
+	_ [4]byte // align
+	pix v4l2_pix_format // offset 8, size 48
+	_ [152]byte // filler
+}
+
+type v4l2_pix_format struct { // size 48
+	width uint32 // offset 0, size 4
+	height uint32 // offset 4, size 4
+	pixelformat uint32 // offset 8, size 4
+	field uint32 // offset 12, size 4
+	bytesperline uint32 // offset 16, size 4
+	sizeimage uint32 // offset 20, size 4
+	colorspace uint32 // offset 24, size 4
+	priv uint32 // offset 28, size 4
+	flags uint32 // offset 32, size 4
+	ycbcr_enc uint32 // offset 36, size 4
+	quantization uint32 // offset 40, size 4
+	xfer_func uint32 // offset 44, size 4
+}
+
+type v4l2_streamparm struct { // size 204
+	typ uint32 // offset 0, size 4
+	capture v4l2_captureparm // offset 4, size 40
+	_ [160]byte // filler
+}
+
+type v4l2_captureparm struct { // size 40
+	capability uint32 // offset 0, size 4
+	capturemode uint32 // offset 4, size 4
+	timeperframe v4l2_fract // offset 8, size 8
+	extendedmode uint32 // offset 16, size 4
+	readbuffers uint32 // offset 20, size 4
+	reserved [4]uint32 // offset 24, size 16
+}
+
+type v4l2_fract struct { // size 8
+	numerator uint32 // offset 0, size 4
+	denominator uint32 // offset 4, size 4
+}
+
+type v4l2_requestbuffers struct { // size 20
+	count uint32 // offset 0, size 4
+	typ uint32 // offset 4, size 4
+	memory uint32 // offset 8, size 4
+	capabilities uint32 // offset 12, size 4
+	flags uint8 // offset 16, size 1
+	reserved [3]uint8 // offset 17, size 3
+}
+
+type v4l2_buffer struct { // size 88
+	index uint32 // offset 0, size 4
+	typ uint32 // offset 4, size 4
+	bytesused uint32 // offset 8, size 4
+	flags uint32 // offset 12, size 4
+	field uint32 // offset 16, size 4
+	_ [20]byte // align
+	timecode v4l2_timecode // offset 40, size 16
+	sequence uint32 // offset 56, size 4
+	memory uint32 // offset 60, size 4
+	offset uint32 // offset 64, size 4
+	_ [4]byte // align
+	length uint32 // offset 72, size 4
+	_ [12]byte // filler
+}
+
+type v4l2_timecode struct { // size 16
+	typ uint32 // offset 0, size 4
+	flags uint32 // offset 4, size 4
+	frames uint8 // offset 8, size 1
+	seconds uint8 // offset 9, size 1
+	minutes uint8 // offset 10, size 1
+	hours uint8 // offset 11, size 1
+	userbits [4]uint8 // offset 12, size 4
+}
+
+type v4l2_fmtdesc struct { // size 64
+	index uint32 // offset 0, size 4
+	typ uint32 // offset 4, size 4
+	flags uint32 // offset 8, size 4
+	description [32]byte // offset 12, size 32
+	pixelformat uint32 // offset 44, size 4
+	mbus_code uint32 // offset 48, size 4
+	reserved [3]uint32 // offset 52, size 12
+}
+
+type v4l2_frmsizeenum struct { // size 44
+	index uint32 // offset 0, size 4
+	pixel_format uint32 // offset 4, size 4
+	typ uint32 // offset 8, size 4
+	discrete v4l2_frmsize_discrete // offset 12, size 8
+	_ [24]byte // filler
+}
+
+type v4l2_frmsize_discrete struct { // size 8
+	width uint32 // offset 0, size 4
+	height uint32 // offset 4, size 4
+}
+
+type v4l2_frmivalenum struct { // size 52
+	index uint32 // offset 0, size 4
+	pixel_format uint32 // offset 4, size 4
+	width uint32 // offset 8, size 4
+	height uint32 // offset 12, size 4
+	typ uint32 // offset 16, size 4
+	discrete v4l2_fract // offset 20, size 8
+	_ [24]byte // filler
+}
+