root/include/linux/video_encoder.h

#ifndef _LINUX_VIDEO_ENCODER_H
#define _LINUX_VIDEO_ENCODER_H

struct video_encoder_capability { /* this name is too long */
        __u32   flags;
#define VIDEO_ENCODER_PAL       1       /* can encode PAL signal */
#define VIDEO_ENCODER_NTSC      2       /* can encode NTSC */
#define VIDEO_ENCODER_SECAM     4       /* can encode SECAM */
#define VIDEO_ENCODER_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 */
};

#define ENCODER_GET_CAPABILITIES _IOR('e', 1, struct video_encoder_capability)
#define ENCODER_SET_NORM        _IOW('e', 2, int)
#define ENCODER_SET_INPUT       _IOW('e', 3, int)       /* 0 <= input < #inputs */
#define ENCODER_SET_OUTPUT      _IOW('e', 4, int)       /* 0 <= output < #outputs */
#define ENCODER_ENABLE_OUTPUT   _IOW('e', 5, int)       /* boolean output enable control */


#endif