| 1 | #ifndef MARS_MVideo
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| 2 | #define MARS_MVideo
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| 3 |
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| 4 | #ifndef MAGIC_MAGIC
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| 5 | #include "MAGIC.h"
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| 6 | #endif
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| 7 |
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| 8 | #ifndef __CINT__
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| 9 | #ifndef __LINUX_VIDEODEV_H
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| 10 | #include <linux/videodev.h> // video4linux
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| 11 | #endif
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| 12 | #ifndef __LINUX_VIDEODEV2_H
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| 13 | #include <linux/videodev2.h> // video4linux2
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| 14 | #endif
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| 15 | #endif
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| 16 |
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| 17 | struct v4l2_queryctrl;
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| 18 | class TEnv;
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| 19 |
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| 20 | class MVideoCtrl : public TObject
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| 21 | {
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| 22 | friend class MVideo;
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| 23 | private:
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| 24 | UInt_t fId;
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| 25 | //enum v4l2_ctrl_type type;
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| 26 | TString fName;
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| 27 | Int_t fMinimum;
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| 28 | Int_t fMaximum;
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| 29 | Int_t fStep;
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| 30 | Int_t fDefault;
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| 31 | UInt_t fFlags;
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| 32 |
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| 33 | UInt_t fValue;
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| 34 |
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| 35 | public:
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| 36 | MVideoCtrl(const v4l2_queryctrl &ctrl);
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| 37 | const char *GetName() const { return fName; }
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| 38 | const char *GetTitle() const { return Form("Range=[%d;%d] Step=%d Def=%d", fMinimum, fMaximum, fStep, fDefault); }
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| 39 |
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| 40 | //ClassDef(MVideoCtrl, 0) // Helper class to enumare device controls
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| 41 | };
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| 42 |
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| 43 | class MVideo
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| 44 | {
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| 45 | private:
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| 46 | TString fPath; // Device path
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| 47 |
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| 48 | int fFileDesc; // File descriptor
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| 49 |
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| 50 | unsigned char *fMapBuffer;
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| 51 |
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| 52 | protected:
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| 53 | struct video_capability fCaps; // Device capabilities
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| 54 | struct video_channel fChannel; // Channel information
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| 55 | struct video_mbuf fBuffer; // Buffer information
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| 56 | struct video_picture fProp; // Picture properties
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| 57 | struct video_tuner fAbil; // Tuner abilities
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| 58 |
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| 59 | ULong64_t fVideoStandard;
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| 60 |
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| 61 | TList fControls;
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| 62 |
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| 63 | private:
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| 64 | int Ioctl(int req, void *opt, bool allowirq=true, bool force=false) const;
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| 65 |
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| 66 | void Reset();
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| 67 |
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| 68 | Bool_t EnumerateControls(UInt_t id);
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| 69 | Bool_t EnumerateControls();
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| 70 | Bool_t GetCapabilities();
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| 71 | Bool_t GetProperties();
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| 72 | Bool_t GetTunerAbilities();
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| 73 | Bool_t GetVideoStandard();
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| 74 | Bool_t Init(Int_t channel);
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| 75 |
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| 76 | // Conversion functions
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| 77 | TString GetDevType(int type) const;
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| 78 | TString GetChannelFlags(Int_t flags) const;
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| 79 | TString GetChannelType(Int_t type) const;
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| 80 | TString GetTunerFlags(Int_t type) const;
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| 81 | TString GetTunerMode(Int_t type) const;
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| 82 | TString GetPalette(Int_t pal) const;
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| 83 |
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| 84 | public:
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| 85 | MVideo(const char *path="/dev/video");
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| 86 | virtual ~MVideo() { Close(); }
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| 87 |
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| 88 | // Getter
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| 89 | Bool_t IsOpen() const { return fFileDesc>0 && fMapBuffer; }
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| 90 | Bool_t CanCapture() const;
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| 91 | Bool_t HasTuner() const;
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| 92 | Int_t GetNumBuffers() const;
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| 93 |
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| 94 | Int_t GetWidth() const;
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| 95 | Int_t GetHeight() const;
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| 96 |
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| 97 | // Control
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| 98 | Bool_t Open(Int_t channel=0);
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| 99 | Int_t Close();
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| 100 |
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| 101 | Int_t SetChannel(Int_t chan);
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| 102 | Bool_t ReadControl(MVideoCtrl &vctrl) const;
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| 103 | Bool_t WriteControl(MVideoCtrl &vctrl, Int_t val) const;
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| 104 | Bool_t SetControls(TEnv &env) const;
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| 105 | Bool_t ResetControl(MVideoCtrl &vctrl) const;
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| 106 | Bool_t ResetControls() const;
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| 107 |
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| 108 | // Image capture
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| 109 | Bool_t CaptureStart(unsigned int frame) const;
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| 110 | Int_t CaptureWait(unsigned int frame, unsigned char **ptr=0) const;
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| 111 |
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| 112 | // Support
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| 113 | void Print() const;
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| 114 |
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| 115 | // hardware features
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| 116 | //void SetPicPar(int bright, int hue, int contrast);
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| 117 | //void GetPicPar(int *bright, int *hue, int *contrast);
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| 118 |
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| 119 | //ClassDef(MVideo, 0) // Interface to Video4Linux at a simple level
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| 120 |
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| 121 | };
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| 122 |
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| 123 | #endif
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