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Index ¶
Constants ¶
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const ( V4L2_BUF_TYPE_VIDEO_CAPTURE = 1 V4L2_FIELD_ANY = 0 V4L2_FIELD_NONE = 1 V4L2_PIX_FMT_JPEG = 'J' | 'P'<<8 | 'E'<<16 | 'G'<<24 V4L2_PIX_FMT_H264 = 'H' | '2'<<8 | '6'<<16 | '4'<<24 V4L2_PIX_FMT_AVC1 = 'A' | 'V'<<8 | 'C'<<16 | '1'<<24 V4L2_PIX_FMT_VP8 = 'V' | 'P'<<8 | '8'<<16 | '0'<<24 V4L2_MEMORY_MMAP = 1 VIDIOC_DQBUF = 0xc0445611 VIDIOC_QBUF = 0xc044560f VIDIOC_QUERYBUF = 0xc0445609 VIDIOC_QUERYCAP = 0x80685600 VIDIOC_REQBUFS = 0xc0145608 VIDIOC_G_EXT_CTRLS = 0xc0185647 VIDIOC_S_EXT_CTRLS = 0xc0185648 VIDIOC_S_FMT = 0xc0cc5605 VIDIOC_STREAMON = 0x40045612 VIDIOC_STREAMOFF = 0x40045613 VIDIOC_S_CTRL = 0xc008561c )
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const ( // Control classes V4L2_CTRL_CLASS_USER = 0x00980000 V4L2_CTRL_CLASS_MPEG = 0x00990000 V4L2_CTRL_CLASS_CAMERA = 0x009a0000 V4L2_CTRL_CLASS_DV = 0x00a00000 // User-class control IDs V4L2_CID_BASE = V4L2_CTRL_CLASS_USER | 0x900 V4L2_CID_USER_BASE = V4L2_CID_BASE V4L2_CID_USER_CLASS = V4L2_CTRL_CLASS_USER | 1 V4L2_CID_BRIGHTNESS = V4L2_CID_BASE + 0 V4L2_CID_CONTRAST = V4L2_CID_BASE + 1 V4L2_CID_SATURATION = V4L2_CID_BASE + 2 V4L2_CID_HUE = V4L2_CID_BASE + 3 V4L2_CID_AUTO_WHITE_BALANCE = V4L2_CID_BASE + 12 V4L2_CID_DO_WHITE_BALANCE = V4L2_CID_BASE + 13 V4L2_CID_RED_BALANCE = V4L2_CID_BASE + 14 V4L2_CID_BLUE_BALANCE = V4L2_CID_BASE + 15 V4L2_CID_GAMMA = V4L2_CID_BASE + 16 V4L2_CID_EXPOSURE = V4L2_CID_BASE + 17 V4L2_CID_AUTOGAIN = V4L2_CID_BASE + 18 V4L2_CID_GAIN = V4L2_CID_BASE + 19 V4L2_CID_HFLIP = V4L2_CID_BASE + 20 V4L2_CID_VFLIP = V4L2_CID_BASE + 21 // MPEG-class control IDs V4L2_CID_MPEG_BASE = V4L2_CTRL_CLASS_MPEG | 0x900 V4L2_CID_MPEG_CLASS = V4L2_CTRL_CLASS_MPEG | 1 V4L2_CID_MPEG_VIDEO_B_FRAMES = V4L2_CID_MPEG_BASE + 202 V4L2_CID_MPEG_VIDEO_GOP_SIZE = V4L2_CID_MPEG_BASE + 203 V4L2_CID_MPEG_VIDEO_BITRATE = V4L2_CID_MPEG_BASE + 207 V4L2_CID_MPEG_VIDEO_REPEAT_SEQ_HEADER = V4L2_CID_MPEG_BASE + 226 V4L2_CID_MPEG_VIDEO_H264_I_PERIOD = V4L2_CID_MPEG_BASE + 358 V4L2_CID_MPEG_VIDEO_H264_LEVEL = V4L2_CID_MPEG_BASE + 359 V4L2_CID_MPEG_VIDEO_H264_PROFILE = V4L2_CID_MPEG_BASE + 363 // H.264 Levels V4L2_MPEG_VIDEO_H264_LEVEL_1_0 = 0 V4L2_MPEG_VIDEO_H264_LEVEL_1B = 1 V4L2_MPEG_VIDEO_H264_LEVEL_1_1 = 2 V4L2_MPEG_VIDEO_H264_LEVEL_1_2 = 3 V4L2_MPEG_VIDEO_H264_LEVEL_1_3 = 4 V4L2_MPEG_VIDEO_H264_LEVEL_2_0 = 5 V4L2_MPEG_VIDEO_H264_LEVEL_2_1 = 6 V4L2_MPEG_VIDEO_H264_LEVEL_2_2 = 7 V4L2_MPEG_VIDEO_H264_LEVEL_3_0 = 8 V4L2_MPEG_VIDEO_H264_LEVEL_3_1 = 9 V4L2_MPEG_VIDEO_H264_LEVEL_3_2 = 10 V4L2_MPEG_VIDEO_H264_LEVEL_4_0 = 11 V4L2_MPEG_VIDEO_H264_LEVEL_4_1 = 12 V4L2_MPEG_VIDEO_H264_LEVEL_4_2 = 13 V4L2_MPEG_VIDEO_H264_LEVEL_5_0 = 14 V4L2_MPEG_VIDEO_H264_LEVEL_5_1 = 15 // H.264 Profiles V4L2_MPEG_VIDEO_H264_PROFILE_BASELINE = 0 V4L2_MPEG_VIDEO_H264_PROFILE_CONSTRAINED_BASELINE = 1 V4L2_MPEG_VIDEO_H264_PROFILE_MAIN = 2 V4L2_MPEG_VIDEO_H264_PROFILE_EXTENDED = 3 V4L2_MPEG_VIDEO_H264_PROFILE_HIGH = 4 V4L2_MPEG_VIDEO_H264_PROFILE_HIGH_10 = 5 V4L2_MPEG_VIDEO_H264_PROFILE_HIGH_422 = 6 V4L2_MPEG_VIDEO_H264_PROFILE_HIGH_444_PREDICTIVE = 7 V4L2_MPEG_VIDEO_H264_PROFILE_HIGH_10_INTRA = 8 V4L2_MPEG_VIDEO_H264_PROFILE_HIGH_422_INTRA = 9 V4L2_MPEG_VIDEO_H264_PROFILE_HIGH_444_INTRA = 10 V4L2_MPEG_VIDEO_H264_PROFILE_CAVLC_444_INTRA = 11 V4L2_MPEG_VIDEO_H264_PROFILE_SCALABLE_BASELINE = 12 V4L2_MPEG_VIDEO_H264_PROFILE_SCALABLE_HIGH = 13 V4L2_MPEG_VIDEO_H264_PROFILE_SCALABLE_HIGH_INTRA = 14 )
Controls (from linux/v4l2-controls.h)
Variables ¶
This section is empty.
Functions ¶
func Open ¶
func Open(devpath string, cfg Config) (media.VideoSource, error)
Open a V4L2 video device (usually /dev/video0).
func OpenDevice ¶
Types ¶
type Config ¶
type Config struct {
Format int // Video format (e.g. H264)
Width int // Video width in pixels
Height int // Video height in pixels
Bitrate int
// Repeat sequence headers (i.e. sequence/picture parameter sets) for
// H.264 pixel format. This is useful for resynchronization in cases
// where the parameter sets are lost.
RepeatSequenceHeader bool
}
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