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pwc-ioctl.h

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00001 #ifndef PWC_IOCTL_H
00002 #define PWC_IOCTL_H
00003 
00004 /* These are private ioctl() commands, specific for the Philips webcams.
00005    They contain functions not found in other webcams, and settings not
00006    specified in the Video4Linux API. 
00007    
00008    The #define names are built up like follows:
00009    VIDIOC               VIDeo IOCtl prefix
00010          PWC            Philps WebCam
00011             [GS]        optional: Get or Set
00012                 ...     The function
00013  */
00014 
00015 /* The frame rate is encoded in the video_window.flags parameter,
00016    in the high 16 bits, since some flags are defined nowadays. The following
00017    defines provide a mask and shift to filter out this value.
00018    
00019    In 'Snapshot' mode the camera freezes its automatic exposure and colour 
00020    balance controls.
00021  */
00022 #define PWC_FPS_SHIFT           16
00023 #define PWC_FPS_MASK            0x00FF0000
00024 #define PWC_FPS_FRMASK          0x003F0000
00025 #define PWC_FPS_SNAPSHOT        0x00400000
00026 
00027 /* These are private ioctl() commands, specific for the Philips webcams.
00028    They contain functions not found in other webcams, and settings not
00029    specified in the Video4Linux API. 
00030  */
00031 
00032 
00033  /* Restore user settings */
00034 #define VIDIOCPWCRUSER          _IO('v', 192)
00035  /* Save user settings */
00036 #define VIDIOCPWCSUSER          _IO('v', 193)
00037  /* Restore factory settings */
00038 #define VIDIOCPWCFACTORY        _IO('v', 194)
00039 
00040  /* You can manipulate the compression factor. A compression preference of 0
00041     means use uncompressed modes when available; 1 is low compression, 2 is
00042     medium and 3 is high compression preferred. Of course, the higher the
00043     compression, the lower the bandwidth used but more chance of artefacts
00044     in the image. The driver automaticly chooses a higher compression when
00045     the preferred mode is not available.
00046   */
00047  /* Set preferred compression quality (0 = uncompressed, 3 = highest compression) */
00048 #define VIDIOCPWCSCQUAL         _IOW('v', 195, int)
00049  /* Get preferred compression quality */
00050 #define VIDIOCPWCGCQUAL         _IOR('v', 195, int)
00051 
00052  /* Set AGC (Automatic Gain Control); int < 0 = auto, 0..65535 = fixed */
00053 #define VIDIOCPWCSAGC           _IOW('v', 200, int)
00054  /* Get AGC; int < 0 = auto, >= 0 = fixed. range 0..65535 */
00055 #define VIDIOCPWCGAGC           _IOR('v', 200, int)
00056 
00057 #define VIDIOCPWCSSHUTTER       _IOW('v', 201, int)
00058 
00059 #endif

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