43 lines
1.2 KiB
C
43 lines
1.2 KiB
C
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/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* vivid-rds-gen.h - rds (radio data system) generator support functions.
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*
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* Copyright 2014 Cisco Systems, Inc. and/or its affiliates. All rights reserved.
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*/
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#ifndef _VIVID_RDS_GEN_H_
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#define _VIVID_RDS_GEN_H_
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/*
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* It takes almost exactly 5 seconds to transmit 57 RDS groups.
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* Each group has 4 blocks and each block has a payload of 16 bits + a
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* block identification. The driver will generate the contents of these
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* 57 groups only when necessary and it will just be played continuously.
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*/
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#define VIVID_RDS_GEN_GROUPS 57
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#define VIVID_RDS_GEN_BLKS_PER_GRP 4
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#define VIVID_RDS_GEN_BLOCKS (VIVID_RDS_GEN_BLKS_PER_GRP * VIVID_RDS_GEN_GROUPS)
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#define VIVID_RDS_NSEC_PER_BLK (u32)(5ull * NSEC_PER_SEC / VIVID_RDS_GEN_BLOCKS)
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struct vivid_rds_gen {
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struct v4l2_rds_data data[VIVID_RDS_GEN_BLOCKS];
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bool use_rbds;
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u16 picode;
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u8 pty;
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bool mono_stereo;
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bool art_head;
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bool compressed;
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bool dyn_pty;
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bool ta;
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bool tp;
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bool ms;
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char psname[8 + 1];
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char radiotext[64 + 1];
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};
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void vivid_rds_gen_fill(struct vivid_rds_gen *rds, unsigned freq,
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bool use_alternate);
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void vivid_rds_generate(struct vivid_rds_gen *rds);
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#endif
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