root/include/linux/video_decoder.h

#ifndef _LINUX_VIDEO_DECODER_H
#define _LINUX_VIDEO_DECODER_H

#define HAVE_VIDEO_DECODER 1

struct video_decoder_capability { /* this name is too long */
        __u32   flags;
#define VIDEO_DECODER_PAL       1       /* can decode PAL signal */
#define VIDEO_DECODER_NTSC      2       /* can decode NTSC */
#define VIDEO_DECODER_SECAM     4       /* can decode SECAM */
#define VIDEO_DECODER_AUTO      8       /* can autosense norm */
#define VIDEO_DECODER_CCIR      16      /* CCIR-601 pixel rate (720 pixels per line) instead of square pixel rate */
        int     inputs;                 /* number of inputs */
        int     outputs;                /* number of outputs */
};

/*
DECODER_GET_STATUS returns the following flags.  The only one you need is
DECODER_STATUS_GOOD, the others are just nice things to know.
*/
#define DECODER_STATUS_GOOD     1       /* receiving acceptable input */
#define DECODER_STATUS_COLOR    2       /* receiving color information */
#define DECODER_STATUS_PAL      4       /* auto detected */
#define DECODER_STATUS_NTSC     8       /* auto detected */
#define DECODER_STATUS_SECAM    16      /* auto detected */

struct video_decoder_init {
        unsigned char len;
        const unsigned char *data;
};

#define DECODER_GET_CAPABILITIES _IOR('d', 1, struct video_decoder_capability)
#define DECODER_GET_STATUS      _IOR('d', 2, int)
#define DECODER_SET_NORM        _IOW('d', 3, int)
#define DECODER_SET_INPUT       _IOW('d', 4, int)       /* 0 <= input < #inputs */
#define DECODER_SET_OUTPUT      _IOW('d', 5, int)       /* 0 <= output < #outputs */
#define DECODER_ENABLE_OUTPUT   _IOW('d', 6, int)       /* boolean output enable control */
#define DECODER_SET_PICTURE     _IOW('d', 7, struct video_picture)
#define DECODER_SET_GPIO        _IOW('d', 8, int)       /* switch general purpose pin */
#define DECODER_INIT            _IOW('d', 9, struct video_decoder_init) /* init internal registers at once */
#define DECODER_SET_VBI_BYPASS  _IOW('d', 10, int)      /* switch vbi bypass */

#define DECODER_DUMP            _IO('d', 192)           /* debug hook */


#endif