edid.h

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typedef unsigned char uchar;
typedef struct MonitorInfo MonitorInfo;
typedef struct Timing Timing;
typedef struct DetailedTiming DetailedTiming;
 
typedef enum
{
    UNDEFINED,
    DVI,
    HDMI_A,
    HDMI_B,
    MDDI,
    DISPLAY_PORT
} Interface;
 
typedef enum
{
    UNDEFINED_COLOR,
    MONOCHROME,
    RGB,
    OTHER_COLOR
} ColorType;
 
typedef enum
{
    NO_STEREO,
    FIELD_RIGHT,
    FIELD_LEFT,
    TWO_WAY_RIGHT_ON_EVEN,
    TWO_WAY_LEFT_ON_EVEN,
    FOUR_WAY_INTERLEAVED,
    SIDE_BY_SIDE
} StereoType;
 
struct Timing
{
    int width;
    int height;
    int frequency;
};
 
struct DetailedTiming
{
    int         pixel_clock;
    int         h_addr;
    int         h_blank;
    int         h_sync;
    int         h_front_porch;
    int         v_addr;
    int         v_blank;
    int         v_sync;
    int         v_front_porch;
    int         width_mm;
    int         height_mm;
    int         right_border;
    int         top_border;
    int         interlaced;
    StereoType  stereo;
 
    int         digital_sync;
    union
    {
        struct
        {
            int bipolar;
            int serrations;
            int sync_on_green;
        } analog;
 
        struct
        {
            int composite;
            int serrations;
            int negative_vsync;
            int negative_hsync;
        } digital;
    } ad;
};
 
struct MonitorInfo
{
    int                 checksum;
    char                manufacturer_code[4];
    int                 product_code;
    unsigned int        serial_number;
    
    int                 production_week;        /* -1 if not specified */
    int                 production_year;        /* -1 if not specified */
    int                 model_year;             /* -1 if not specified */
 
    int                 major_version;
    int                 minor_version;
 
    int                 is_digital;
    
    union
    {
        struct
        {
            int         bits_per_primary;
            Interface   interface;
            int         rgb444;
            int         ycrcb444;
            int         ycrcb422;
        } digital;
 
        struct
        {
            double      video_signal_level;
            double      sync_signal_level;
            double      total_signal_level;
 
            int         blank_to_black;
 
            int         separate_hv_sync;
            int         composite_sync_on_h;
            int         composite_sync_on_green;
            int         serration_on_vsync;
            ColorType   color_type;
        } analog;
    } ad;
 
    int                 width_mm;               /* -1 if not specified */
    int                 height_mm;              /* -1 if not specified */
    double              aspect_ratio;           /* -1.0 if not specififed */
 
    double              gamma;                  /* -1.0 if not specified */
 
    int                 standby;
    int                 suspend;
    int                 active_off;
 
    int                 srgb_is_standard;
    int                 preferred_timing_includes_native;
    int                 continuous_frequency;
 
    double              red_x;
    double              red_y;
    double              green_x;
    double              green_y;
    double              blue_x;
    double              blue_y;
    double              white_x;
    double              white_y;
 
    Timing              established[24];        /* Terminated by 0x0x0 */
    Timing              standard[8];
    
    int                 n_detailed_timings;
    DetailedTiming      detailed_timings[4];    /* If monitor has a preferred
                                                 * mode, it is the first one
                                                 * (whether it has, is
                                                 * determined by the 
                                                 * preferred_timing_includes
                                                 * bit.
                                                 */
 
    /* Optional product description */
    char                dsc_serial_number[14];
    char                dsc_product_name[14];
    char                dsc_string[14];         /* Unspecified ASCII data */
};
 
MonitorInfo *decode_edid (const uchar *data);
void         dump_monitor_info (MonitorInfo *info);
char *       make_display_name (const char        *output_name,
                                const MonitorInfo *info);