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44e1810f2b
Nested structs makes it impossible to extend the nested struct after extending the base struct. The union acts as a single struct in this case but the nesting is still an issue. Use pointers to those structs instead to keep all of them extensible. Only the struct which is applicable for the signal type is not a null pointer to make sure only valid data is accessed. Signed-off-by: Sebastian Wick <sebastian.wick@redhat.com>
123 lines
3.4 KiB
C
123 lines
3.4 KiB
C
#ifndef EDID_H
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#define EDID_H
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/**
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* Private header for the low-level EDID API.
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*/
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#include <stdbool.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <libdisplay-info/edid.h>
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#include "cta.h"
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/**
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* The maximum number of EDID blocks (including the base block), defined in
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* section 2.2.1.
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*/
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#define EDID_MAX_BLOCK_COUNT 256
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/**
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* The maximum number of EDID standard timings, defined in section 3.9.
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*/
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#define EDID_MAX_STANDARD_TIMING_COUNT 8
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/**
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* The number of EDID byte descriptors, defined in section 3.10.
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*/
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#define EDID_BYTE_DESCRIPTOR_COUNT 4
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/**
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* The size of an EDID byte descriptor, defined in section 3.10.
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*/
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#define EDID_BYTE_DESCRIPTOR_SIZE 18
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/**
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* The maximum number of standard timings in an EDID display descriptor, defined
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* in section 3.10.3.6.
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*/
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#define EDID_MAX_DESCRIPTOR_STANDARD_TIMING_COUNT 6
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struct di_edid_detailed_timing_def_priv {
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struct di_edid_detailed_timing_def base;
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struct di_edid_detailed_timing_analog_composite analog_composite;
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struct di_edid_detailed_timing_bipolar_analog_composite bipolar_analog_composite;
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struct di_edid_detailed_timing_digital_composite digital_composite;
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struct di_edid_detailed_timing_digital_separate digital_separate;
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};
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struct di_edid {
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struct di_edid_vendor_product vendor_product;
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int version, revision;
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bool is_digital;
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struct di_edid_video_input_analog video_input_analog;
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struct di_edid_video_input_digital video_input_digital;
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struct di_edid_screen_size screen_size;
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float gamma;
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struct di_edid_dpms dpms;
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enum di_edid_display_color_type display_color_type;
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struct di_edid_color_encoding_formats color_encoding_formats;
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struct di_edid_misc_features misc_features;
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struct di_edid_chromaticity_coords chromaticity_coords;
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struct di_edid_established_timings_i_ii established_timings_i_ii;
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/* NULL-terminated */
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struct di_edid_standard_timing *standard_timings[EDID_MAX_STANDARD_TIMING_COUNT + 1];
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size_t standard_timings_len;
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/* NULL-terminated */
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struct di_edid_detailed_timing_def_priv *detailed_timing_defs[EDID_BYTE_DESCRIPTOR_COUNT + 1];
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size_t detailed_timing_defs_len;
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/* NULL-terminated */
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struct di_edid_display_descriptor *display_descriptors[EDID_BYTE_DESCRIPTOR_COUNT + 1];
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size_t display_descriptors_len;
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/* NULL-terminated, doesn't include the base block */
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struct di_edid_ext *exts[EDID_MAX_BLOCK_COUNT];
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size_t exts_len;
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struct di_logger *logger;
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};
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struct di_edid_display_descriptor {
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enum di_edid_display_descriptor_tag tag;
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/* Used for PRODUCT_SERIAL, DATA_STRING and PRODUCT_NAME,
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* zero-terminated */
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char str[14];
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/* Used for RANGE_LIMITS */
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struct di_edid_display_range_limits range_limits;
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/* Used for STD_TIMING_IDS, NULL-terminated */
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struct di_edid_standard_timing *standard_timings[EDID_MAX_DESCRIPTOR_STANDARD_TIMING_COUNT + 1];
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size_t standard_timings_len;
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};
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struct di_edid_ext {
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enum di_edid_ext_tag tag;
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/* Used for DI_EDID_EXT_CEA */
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struct di_edid_cta cta;
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};
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/**
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* Create an EDID data structure.
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*
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* Callers do not need to keep the provided data pointer valid after calling
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* this function. Callers should destroy the returned pointer via
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* di_edid_destroy().
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*/
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struct di_edid *
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_di_edid_parse(const void *data, size_t size, FILE *failure_msg_file);
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/**
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* Destroy an EDID data structure.
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*/
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void
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_di_edid_destroy(struct di_edid *edid);
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/**
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* Parse an EDID detailed timing definition.
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*/
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struct di_edid_detailed_timing_def_priv *
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_di_edid_parse_detailed_timing_def(const uint8_t data[static EDID_BYTE_DESCRIPTOR_SIZE]);
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#endif
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