source: trunk/MagicSoft/Cosy/videodev/MVideo.h@ 9445

Last change on this file since 9445 was 8862, checked in by tbretz, 17 years ago
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1#ifndef MARS_MVideo
2#define MARS_MVideo
3
4#ifndef MAGIC_MAGIC
5#include "MAGIC.h"
6#endif
7
8#ifndef __CINT__
9#ifndef __LINUX_VIDEODEV_H
10#include <linux/videodev.h> // video4linux
11#endif
12#ifndef __LINUX_VIDEODEV2_H
13#include <linux/videodev2.h> // video4linux2
14#endif
15#endif
16
17struct v4l2_queryctrl;
18class TEnv;
19
20class MVideoCtrl : public TObject
21{
22 friend class MVideo;
23private:
24 UInt_t fId;
25 //enum v4l2_ctrl_type type;
26 TString fName;
27 Int_t fMinimum;
28 Int_t fMaximum;
29 Int_t fStep;
30 Int_t fDefault;
31 UInt_t fFlags;
32
33 UInt_t fValue;
34
35public:
36 MVideoCtrl(const v4l2_queryctrl &ctrl);
37 const char *GetName() const { return fName; }
38 const char *GetTitle() const { return Form("Range=[%d;%d] Step=%d Def=%d", fMinimum, fMaximum, fStep, fDefault); }
39
40 //ClassDef(MVideoCtrl, 0) // Helper class to enumare device controls
41};
42
43class MVideo
44{
45private:
46 TString fPath; // Device path
47
48 int fFileDesc; // File descriptor
49
50 unsigned char *fMapBuffer;
51
52protected:
53 struct video_capability fCaps; // Device capabilities
54 struct video_channel fChannel; // Channel information
55 struct video_mbuf fBuffer; // Buffer information
56 struct video_picture fProp; // Picture properties
57 struct video_tuner fAbil; // Tuner abilities
58
59 ULong64_t fVideoStandard;
60
61 TList fControls;
62
63private:
64 int Ioctl(int req, void *opt, bool allowirq=true, bool force=false) const;
65
66 void Reset();
67
68 Bool_t EnumerateControls(UInt_t id);
69 Bool_t EnumerateControls();
70 Bool_t GetCapabilities();
71 Bool_t GetProperties();
72 Bool_t GetTunerAbilities();
73 Bool_t GetVideoStandard();
74 Bool_t Init(Int_t channel);
75
76 // Conversion functions
77 TString GetDevType(int type) const;
78 TString GetChannelFlags(Int_t flags) const;
79 TString GetChannelType(Int_t type) const;
80 TString GetTunerFlags(Int_t type) const;
81 TString GetTunerMode(Int_t type) const;
82 TString GetPalette(Int_t pal) const;
83
84public:
85 MVideo(const char *path="/dev/video");
86 virtual ~MVideo() { Close(); }
87
88 // Getter
89 Bool_t IsOpen() const { return fFileDesc>0 && fMapBuffer; }
90 Bool_t CanCapture() const;
91 Bool_t HasTuner() const;
92 Int_t GetNumBuffers() const;
93
94 Int_t GetWidth() const;
95 Int_t GetHeight() const;
96
97 // Control
98 Bool_t Open(Int_t channel=0);
99 Int_t Close();
100
101 Int_t SetChannel(Int_t chan);
102 Bool_t ReadControl(MVideoCtrl &vctrl) const;
103 Bool_t WriteControl(MVideoCtrl &vctrl, Int_t val) const;
104 Bool_t SetControls(TEnv &env) const;
105 Bool_t ResetControl(MVideoCtrl &vctrl) const;
106 Bool_t ResetControls() const;
107
108 // Image capture
109 Bool_t CaptureStart(unsigned int frame) const;
110 Int_t CaptureWait(unsigned int frame, unsigned char **ptr=0) const;
111
112 // Support
113 void Print() const;
114
115 // hardware features
116 //void SetPicPar(int bright, int hue, int contrast);
117 //void GetPicPar(int *bright, int *hue, int *contrast);
118
119 //ClassDef(MVideo, 0) // Interface to Video4Linux at a simple level
120
121};
122
123#endif
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