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Merge pull request #28 from vladimirvivien/extended-controls
Adding support for extended control codes
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,52 @@ | ||
| package main | ||
|
|
||
| import ( | ||
| "flag" | ||
| "fmt" | ||
| "log" | ||
| "os" | ||
|
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| dev "github.com/vladimirvivien/go4vl/device" | ||
| "github.com/vladimirvivien/go4vl/v4l2" | ||
| ) | ||
|
|
||
| func main() { | ||
| devName := "/dev/video0" | ||
| flag.StringVar(&devName, "d", devName, "device name (path)") | ||
| flag.Parse() | ||
|
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| device, err := dev.Open(devName) | ||
| if err != nil { | ||
| log.Fatalf("failed to open device: %s", err) | ||
| } | ||
| defer device.Close() | ||
|
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| ctrls, err := v4l2.QueryAllExtControls(device.Fd()) | ||
| if err != nil { | ||
| log.Fatalf("failed to get ext controls: %s", err) | ||
| } | ||
| if len(ctrls) == 0 { | ||
| log.Println("Device does not have extended controls") | ||
| os.Exit(0) | ||
| } | ||
| for _, ctrl := range ctrls { | ||
| printControl(ctrl) | ||
| } | ||
| } | ||
|
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| func printControl(ctrl v4l2.Control) { | ||
| fmt.Printf("Control id (%d) name: %s\t[min: %d; max: %d; step: %d; default: %d current_val: %d]\n", | ||
| ctrl.ID, ctrl.Name, ctrl.Minimum, ctrl.Maximum, ctrl.Step, ctrl.Default, ctrl.Value) | ||
|
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| if ctrl.IsMenu() { | ||
| menus, err := ctrl.GetMenuItems() | ||
| if err != nil { | ||
| return | ||
| } | ||
|
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| for _, m := range menus { | ||
| fmt.Printf("\t(%d) Menu %s: [%d]\n", m.Index, m.Name, m.Value) | ||
| } | ||
| } | ||
|
|
||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,85 @@ | ||
| package v4l2 | ||
|
|
||
| /* | ||
| #cgo linux CFLAGS: -I ${SRCDIR}/../include/ | ||
| #include <linux/videodev2.h> | ||
| #include <linux/v4l2-controls.h> | ||
| */ | ||
| import "C" | ||
|
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| // MPEGStreamType represents v4l2_mpeg_stream_type | ||
| // See https://elixir.bootlin.com/linux/latest/source/include/uapi/linux/v4l2-controls.h#L237 | ||
| type MPEGStreamType = uint32 | ||
|
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| const ( | ||
| MPEGStreamTypeMPEG2ProgramStream MPEGStreamType = C.V4L2_MPEG_STREAM_TYPE_MPEG2_PS | ||
| MPEGStreamTypeMPEG2TransportStream MPEGStreamType = C.V4L2_MPEG_STREAM_TYPE_MPEG2_TS | ||
| MPEGStreamTypeMPEG1SystemStream MPEGStreamType = C.V4L2_MPEG_STREAM_TYPE_MPEG1_SS | ||
| MPEGStreamTypeMPEG2DVD MPEGStreamType = C.V4L2_MPEG_STREAM_TYPE_MPEG2_DVD | ||
| MPEGStreamTypeMPEG1VCD MPEGStreamType = C.V4L2_MPEG_STREAM_TYPE_MPEG1_VCD | ||
| MPEGStreamTypeMPEG2SVCD MPEGStreamType = C.V4L2_MPEG_STREAM_TYPE_MPEG2_SVCD | ||
| ) | ||
|
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| type MPEGVideoEncoding = uint32 | ||
|
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| const ( | ||
| MPEGVideoEncodingMPEG1 MPEGVideoEncoding = C.V4L2_MPEG_VIDEO_ENCODING_MPEG_1 | ||
| MPEGVideoEncodingMPEG2 MPEGVideoEncoding = C.V4L2_MPEG_VIDEO_ENCODING_MPEG_2 | ||
| MPEGVideoEncodingMPEG4AVC MPEGVideoEncoding = C.V4L2_MPEG_VIDEO_ENCODING_MPEG_4_AVC | ||
| ) | ||
|
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||
| type MPEGVideoAspect = uint32 | ||
|
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||
| const ( | ||
| MPEGVideoAspect1x1 MPEGVideoAspect = C.V4L2_MPEG_VIDEO_ASPECT_1x1 | ||
| MPEGVideoAspect4x3 MPEGVideoAspect = C.V4L2_MPEG_VIDEO_ASPECT_4x3 | ||
| MPEGVideoAspect16x9 MPEGVideoAspect = C.V4L2_MPEG_VIDEO_ASPECT_16x9 | ||
| MPEGVideoAspect221x100 MPEGVideoAspect = C.V4L2_MPEG_VIDEO_ASPECT_221x100 | ||
| ) | ||
|
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| type MPEGVideoBitrateMode = uint32 | ||
|
|
||
| const ( | ||
| MPEGVideoBitrateModeVBR = C.V4L2_MPEG_VIDEO_BITRATE_MODE_VBR | ||
| MPEGVideoBitrateModeCBR = C.V4L2_MPEG_VIDEO_BITRATE_MODE_CBR | ||
| MPEGVideoBitrateModeCQ = C.V4L2_MPEG_VIDEO_BITRATE_MODE_CQ | ||
| ) | ||
|
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| // Codec control values | ||
| // See https://www.kernel.org/doc/html/latest/userspace-api/media/v4l/ext-ctrls-codec.html | ||
| // See https://elixir.bootlin.com/linux/latest/source/include/uapi/linux/v4l2-controls.h#L228 | ||
| const ( | ||
| CtrlCodecClass CtrlID = C.V4L2_CID_CODEC_CLASS | ||
| CtrlMPEGStreamType MPEGStreamType = C.V4L2_CID_MPEG_STREAM_TYPE | ||
| CtrlMPEGStreamPIDPMT CtrlID = C.V4L2_CID_MPEG_STREAM_PID_PMT | ||
| CtrlMPEGStreamPIDAudio CtrlID = C.V4L2_CID_MPEG_STREAM_PID_AUDIO | ||
| CtrlMPEGStreamPIDVideo CtrlID = C.V4L2_CID_MPEG_STREAM_PID_VIDEO | ||
| CtrlMPEGStreamPIDPCR CtrlID = C.V4L2_CID_MPEG_STREAM_PID_PCR | ||
| CtrlMPEGStreamPIDPESAudio CtrlID = C.V4L2_CID_MPEG_STREAM_PES_ID_AUDIO | ||
| CtrlMPEGStreamPESVideo CtrlID = C.V4L2_CID_MPEG_STREAM_PES_ID_VIDEO | ||
| CtrlMEPGStreamVBIFormat CtrlID = C.V4L2_CID_MPEG_STREAM_VBI_FMT | ||
| CtrlMPEGVideoEncoding MPEGVideoEncoding = C.V4L2_CID_MPEG_VIDEO_ENCODING | ||
| CtrlMPEGVideoAspect MPEGVideoAspect = C.V4L2_CID_MPEG_VIDEO_ASPECT | ||
| CtrlMPEGVideoBFrames CtrlID = C.V4L2_CID_MPEG_VIDEO_B_FRAMES | ||
| CtrlMPEGVideoGOPSize CtrlID = C.V4L2_CID_MPEG_VIDEO_GOP_SIZE | ||
| CtrlMPEGVideoGOPClosure CtrlID = C.V4L2_CID_MPEG_VIDEO_GOP_CLOSURE | ||
| CtrlMPEGVideoPulldown CtrlID = C.V4L2_CID_MPEG_VIDEO_PULLDOWN | ||
| CtrlMPEGVideoBitrateMode MPEGVideoBitrateMode = C.V4L2_CID_MPEG_VIDEO_BITRATE_MODE | ||
| CtrlMPEGVideoBitrate CtrlID = C.V4L2_CID_MPEG_VIDEO_BITRATE | ||
| CtrlMPEGVideoBitratePeak CtrlID = C.V4L2_CID_MPEG_VIDEO_BITRATE_PEAK | ||
| CtrlMPEGVideoTemporalDecimation CtrlID = C.V4L2_CID_MPEG_VIDEO_TEMPORAL_DECIMATION | ||
| CtrlMPEGVideoMute CtrlID = C.V4L2_CID_MPEG_VIDEO_MUTE | ||
| CtrlMPEGVideoMutYUV CtrlID = C.V4L2_CID_MPEG_VIDEO_MUTE_YUV | ||
| CtrlMPEGVideoDecoderSliceInterface CtrlID = C.V4L2_CID_MPEG_VIDEO_DECODER_SLICE_INTERFACE | ||
| CtrlMPEGVideoDecoderMPEG4DeblockFilter CtrlID = C.V4L2_CID_MPEG_VIDEO_DECODER_MPEG4_DEBLOCK_FILTER | ||
| CtrlMPEGVideoCyclicIntraRefreshMB CtrlID = C.V4L2_CID_MPEG_VIDEO_CYCLIC_INTRA_REFRESH_MB | ||
| CtrlMPEGVideoFrameRCEnable CtrlID = C.V4L2_CID_MPEG_VIDEO_FRAME_RC_ENABLE | ||
| CtrlMPEGVideoHeaderMode CtrlID = C.V4L2_CID_MPEG_VIDEO_HEADER_MODE | ||
| CtrlMPEGVideoMaxRefPic CtrlID = C.V4L2_CID_MPEG_VIDEO_MAX_REF_PIC | ||
| CtrlMPEGVideoMBRCEnable CtrlID = C.V4L2_CID_MPEG_VIDEO_MB_RC_ENABLE | ||
| CtrlMPEGVideoMultiSliceMaxBytes CtrlID = C.V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MAX_BYTES | ||
| CtrlMPEGVideoMultiSliceMaxMB CtrlID = C.V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MAX_MB | ||
| CtrlMPEGVideoMultiSliceMode CtrlID = C.V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MODE | ||
|
|
||
| // TODO (vladimir) add remainder codec, there are a lot more! | ||
| ) |
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