| 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 "videodev.h" // video4linux
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| 11 | #endif
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| 12 | #endif
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| 13 |
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| 14 | class MVideo
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| 15 | {
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| 16 | private:
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| 17 | TString fPath; // Device path
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| 18 |
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| 19 | int fFileDesc; // File descriptor
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| 20 |
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| 21 | char *fMapBuffer;
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| 22 |
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| 23 | protected:
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| 24 | struct video_capability fCaps; // Device capabilities
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| 25 | struct video_channel fChannel; // Channel information
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| 26 | struct video_mbuf fBuffer; // Buffer information
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| 27 | struct video_picture fProp; // Picture properties
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| 28 |
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| 29 | private:
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| 30 | int Ioctl(int req, void *opt, bool allowirq=true) const;
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| 31 |
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| 32 | void Reset();
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| 33 |
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| 34 | Bool_t GetCapabilities();
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| 35 | Bool_t GetProperties();
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| 36 | Bool_t Init(Int_t channel);
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| 37 |
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| 38 | // Conversion functions
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| 39 | TString GetDevType(int type) const;
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| 40 | TString GetChannelFlags(Int_t flags) const;
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| 41 | TString GetChannelType(Int_t type) const;
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| 42 | TString GetPalette(Int_t pal) const;
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| 43 |
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| 44 | public:
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| 45 | MVideo(const char *path="/dev/video");
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| 46 | virtual ~MVideo() { Close(); }
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| 47 |
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| 48 | // Getter
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| 49 | Bool_t IsOpen() const { return fFileDesc>0 && fMapBuffer; }
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| 50 | Bool_t CanCapture() const;
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| 51 | Int_t GetNumBuffers() const;
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| 52 |
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| 53 | Int_t GetWidth() const;
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| 54 | Int_t GetHeight() const;
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| 55 |
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| 56 | // Control
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| 57 | Bool_t Open(Int_t channel=0);
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| 58 | Int_t Close();
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| 59 |
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| 60 | Bool_t SetChannel(Int_t chan);
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| 61 |
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| 62 | // Image capture
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| 63 | Bool_t CaptureStart(unsigned int frame) const;
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| 64 | Int_t CaptureWait(unsigned int frame, char **ptr) const;
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| 65 |
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| 66 | // Support
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| 67 | void Print() const;
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| 68 |
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| 69 | // hardware features
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| 70 | //void SetPicPar(int bright, int hue, int contrast);
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| 71 | //void GetPicPar(int *bright, int *hue, int *contrast);
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| 72 |
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| 73 | //ClassDef(MVideo, 0) // Interface to Video4Linux at a simple level
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| 74 |
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| 75 | };
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| 76 |
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| 77 | #endif
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