/* edid.h
 *
 * Copyright 2007, 2008, Red Hat, Inc.
 * 
 * This file is part of the Gnome Library.
 * 
 * The Gnome Library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public License as
 * published by the Free Software Foundation; either version 2 of the
 * License, or (at your option) any later version.
 *
 * The Gnome Library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 * 
 * You should have received a copy of the GNU Library General Public
 * License along with the Gnome Library; see the file COPYING.LIB.  If not,
 * write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 * 
 * Author: Soren Sandmann <sandmann@redhat.com>
 */

#ifndef EDID_H
#define EDID_H

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;
    } connector;
};

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;
    } connector;

    int			width_mm;		/* -1 if not specified */
    int			height_mm;		/* -1 if not specified */
    double		aspect_ratio;		/* -1.0 if not specified */

    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);
char *make_display_name (const MonitorInfo *info);

#endif
