audiod.h

   1 /*
   2  * Copyright (C) 2006-2012 Andre Noll <maan@systemlinux.org>
   3  *
   4  * Licensed under the GPL v2. For licencing details see COPYING.
   5  */
   6
   7 /** \file audiod.h Symbols exported from audiod.c. */
   8
   9
  10 /** enum of audio formats supported by para_audiod */
  11 enum {AUDIOD_AUDIO_FORMATS_ENUM};
  12
  13 /** array of audio format names supported by para_audiod */
  14 extern const char *audio_formats[];
  15
  16 /** maximal number of simultaneous instances */
  17 #define MAX_STREAM_SLOTS 5
  18
  19 /**
  20  * the possible modes of operation
  21  *
  22  * - off: disconnect from para_server
  23  * - on: receive status information from para_server and play the audio stream
  24  * - sb: only receive status information but not the audio stream
  25  */
  26 enum audiod_status_info {AUDIOD_OFF, AUDIOD_ON, AUDIOD_STANDBY};
  27
  28 /** defines one command of para_audiod */
  29 struct audiod_command {
  30         /** the name of the command */
  31         const char *name;
  32         /** pointer to the function that handles the command */
  33         int (*handler)(int, int, char**);
  34         /** one-line description of the command */
  35         const char *description;
  36         /** summary of the command line options */
  37         const char *usage;
  38         /** the long help text */
  39         const char *help;
  40 };
  41
  42 /**
  43  * Describes one instance of a receiver-filter-writer chain.
  44  *
  45  * \sa receiver_node, receiver, filter, filter_node, writer, writer_node,
  46  * writer_node_group.
  47  */
  48 struct slot_info {
  49         /** Number of the audio format in this slot. */
  50         int format;
  51         /** The stream_start status item announced by para_server.  */
  52         struct timeval server_stream_start;
  53         /** The offset status item announced by para_server. */
  54         unsigned offset_seconds;
  55         /** The seconds_total status item announced by para_server. */
  56         unsigned seconds_total;
  57         /** The receiver info associated with this slot. */
  58         struct receiver_node *receiver_node;
  59         /** The array of filter nodes. */
  60         struct filter_node *fns;
  61         /** The array of writers attached to the last filter. */
  62         struct writer_node *wns;
  63 };
  64
  65 extern struct slot_info slot[MAX_STREAM_SLOTS];
  66 extern struct audiod_args_info conf;
  67 extern int audiod_status;
  68
  69 void __noreturn clean_exit(int status, const char *msg);
  70 int handle_connect(int accept_fd, fd_set *rfds);
  71 void audiod_status_dump(void);
  72 char *get_time_string(int slot_num);
  73 struct btr_node *audiod_get_btr_root(void);
  74
  75 void stat_client_write_item(int item_num);
  76 void clear_and_dump_items(void);
  77
  78 /** iterate over all slots */
  79 #define FOR_EACH_SLOT(_slot) for (_slot = 0; _slot < MAX_STREAM_SLOTS; _slot++)