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106 lines
2.8 KiB
C
106 lines
2.8 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 data blocks in an EDID CTA block.
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*
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* Each data block takes at least 1 byte, the CTA block can hold 128 bytes, and
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* the mandatory fields take up 5 bytes (4 header bytes + checksum).
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*/
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#define EDID_CTA_MAX_DATA_BLOCKS 123
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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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/**
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* The maximum number of SVD entries in a video data block.
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*
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* Each data block has its size described in a 5-bit field, so its maximum size
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* is 63 bytes, and each SVD uses 1 byte.
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*/
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#define EDID_CTA_MAX_VIDEO_BLOCK_ENTRIES 63
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/**
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* The maximum number of SAD entries in an audio data block.
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*
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* Each data block has its size described in a 5-bit field, so its maximum size
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* is 63 bytes, and each SAD uses 3 bytes.
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*/
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#define EDID_CTA_MAX_AUDIO_BLOCK_ENTRIES 21
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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[EDID_CTA_MAX_DATA_BLOCKS + 1];
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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_video_block {
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/* NULL-terminated */
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struct di_cta_svd *svds[EDID_CTA_MAX_VIDEO_BLOCK_ENTRIES + 1];
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size_t svds_len;
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};
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struct di_cta_sad_priv {
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struct di_cta_sad base;
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struct di_cta_sad_sample_rates supported_sample_rates;
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struct di_cta_sad_sample_sizes supported_sample_sizes;
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struct di_cta_sad_mpegh_3d mpegh_3d;
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};
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struct di_cta_audio_block {
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/* NULL-terminated */
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struct di_cta_sad_priv *sads[EDID_CTA_MAX_AUDIO_BLOCK_ENTRIES + 1];
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size_t sads_len;
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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_VIDEO */
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struct di_cta_video_block video;
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/* used for DI_CTA_DATA_BLOCK_AUDIO */
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struct di_cta_audio_block audio;
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/* Used for DI_CTA_DATA_BLOCK_VIDEO_CAP */
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struct di_cta_video_cap_block video_cap;
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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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