GNU Linux-libre 4.19.281-gnu1
[releases.git] / drivers / media / platform / vivid / vivid-rds-gen.h
1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3  * vivid-rds-gen.h - rds (radio data system) generator support functions.
4  *
5  * Copyright 2014 Cisco Systems, Inc. and/or its affiliates. All rights reserved.
6  */
7
8 #ifndef _VIVID_RDS_GEN_H_
9 #define _VIVID_RDS_GEN_H_
10
11 /*
12  * It takes almost exactly 5 seconds to transmit 57 RDS groups.
13  * Each group has 4 blocks and each block has a payload of 16 bits + a
14  * block identification. The driver will generate the contents of these
15  * 57 groups only when necessary and it will just be played continuously.
16  */
17 #define VIVID_RDS_GEN_GROUPS 57
18 #define VIVID_RDS_GEN_BLKS_PER_GRP 4
19 #define VIVID_RDS_GEN_BLOCKS (VIVID_RDS_GEN_BLKS_PER_GRP * VIVID_RDS_GEN_GROUPS)
20 #define VIVID_RDS_NSEC_PER_BLK (u32)(5ull * NSEC_PER_SEC / VIVID_RDS_GEN_BLOCKS)
21
22 struct vivid_rds_gen {
23         struct v4l2_rds_data    data[VIVID_RDS_GEN_BLOCKS];
24         bool                    use_rbds;
25         u16                     picode;
26         u8                      pty;
27         bool                    mono_stereo;
28         bool                    art_head;
29         bool                    compressed;
30         bool                    dyn_pty;
31         bool                    ta;
32         bool                    tp;
33         bool                    ms;
34         char                    psname[8 + 1];
35         char                    radiotext[64 + 1];
36 };
37
38 void vivid_rds_gen_fill(struct vivid_rds_gen *rds, unsigned freq,
39                     bool use_alternate);
40 void vivid_rds_generate(struct vivid_rds_gen *rds);
41
42 #endif