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