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;
    };
};

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;
    };

    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);