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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>
60 lines
1.4 KiB
C
60 lines
1.4 KiB
C
#ifndef CTA_H
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#define CTA_H
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/**
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* Private header for the low-level CTA API.
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*/
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#include <stdbool.h>
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#include <stddef.h>
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#include <stdint.h>
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#include <libdisplay-info/cta.h>
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/**
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* The maximum number of detailed timing definitions included in an EDID CTA
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* block.
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*
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* The CTA extension leaves at most 122 bytes for timings, and each timing takes
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* 18 bytes.
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*/
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#define EDID_CTA_MAX_DETAILED_TIMING_DEFS 6
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struct di_edid_cta {
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int revision;
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struct di_edid_cta_flags flags;
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/* NULL-terminated */
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struct di_cta_data_block *data_blocks[128];
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size_t data_blocks_len;
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/* NULL-terminated */
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struct di_edid_detailed_timing_def_priv *detailed_timing_defs[EDID_CTA_MAX_DETAILED_TIMING_DEFS + 1];
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size_t detailed_timing_defs_len;
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struct di_logger *logger;
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};
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struct di_cta_hdr_static_metadata_block_priv {
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struct di_cta_hdr_static_metadata_block base;
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struct di_cta_hdr_static_metadata_block_eotfs eotfs;
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struct di_cta_hdr_static_metadata_block_descriptors descriptors;
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};
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struct di_cta_data_block {
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enum di_cta_data_block_tag tag;
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/* Used for DI_CTA_DATA_BLOCK_COLORIMETRY */
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struct di_cta_colorimetry_block colorimetry;
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/* Used for DI_CTA_DATA_BLOCK_HDR_STATIC_METADATA */
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struct di_cta_hdr_static_metadata_block_priv hdr_static_metadata;
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};
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bool
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_di_edid_cta_parse(struct di_edid_cta *cta, const uint8_t *data, size_t size,
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struct di_logger *logger);
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void
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_di_edid_cta_finish(struct di_edid_cta *cta);
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#endif
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