audiod.h

   1 /** \file audiod.h symbols exported from audiod.c */
   2 int num_filters(int audio_format_num);
   3 int get_audio_format_num(char *name);
   4 enum {
   5         AUDIO_FORMAT_MP3,
   6         AUDIO_FORMAT_OGG,
   7         AUDIO_FORMAT_AAC,
   8         NUM_AUDIO_FORMATS
   9 };
  10 extern const char *audio_formats[];
  11 #define DEFINE_AUDIO_FORMAT_ARRAY const char *audio_formats[] = {"mp3", "ogg", "aac", NULL}
  12 #define MAX_STREAM_SLOTS 5
  13 /**
  14  * the possible modes of operation
  15  *
  16  * - off: disconnect from para_server
  17  * - on: receive status information from para_server and play the audio stream
  18  * - sb: only receive status information but not the audio stream
  19 */
  20 enum {AUDIOD_OFF, AUDIOD_ON, AUDIOD_STANDBY};
  21
  22 /**
  23  * describes one instance of a receiver-filter-writer chain
  24  *
  25  * \sa receier_node, receiver, filter, filter_node, filter_chain, writer,
  26  * writer_node, writer_node_group.
  27   */
  28 struct slot_info {
  29         /** number of the audio format in this slot */
  30         int format;
  31         /** writer start time */
  32         struct timeval wstime;
  33         /** the receiver info associated with this slot */
  34         struct receiver_node *receiver_node;
  35         /** the active filter chain */
  36         struct filter_chain *fc;
  37         /** the active writer node group */
  38         struct writer_node_group *wng;
  39 };
  40 /**
  41  * the main task of audiod
  42  *
  43  * \sa struct task, struct sched
  44  */
  45 struct audiod_task {
  46         struct timeval *now;
  47         struct task task;
  48 };
  49 /**
  50  * the task for audiod's child (para_client stat)
  51  *
  52  * \sa struct task, struct sched
  53  */
  54 struct status_task {
  55         /** the output of the stat command is read from this fd */
  56         int fd;
  57         /** stat data is stored here */
  58         char buf[STRINGSIZE];
  59         /** number of bytes loaded in \a buf */
  60         unsigned loaded;
  61         /** the associated task structure */
  62         struct task task;
  63         /** do not restart client command until this time */
  64         struct timeval restart_barrier;
  65         int playing;
  66         int offset_seconds;
  67         int length_seconds;
  68         int sa_time_diff_sign;
  69         char *stat_item_values[NUM_STAT_ITEMS];
  70         struct timeval server_stream_start;
  71         struct timeval sa_time_diff;
  72 };
  73 extern struct status_task *stat_task;
  74 extern struct slot_info slot[MAX_STREAM_SLOTS];
  75 extern struct gengetopt_args_info conf;
  76 extern int audiod_status;
  77 extern const char *status_item_list[NUM_STAT_ITEMS];
  78
  79 void __noreturn clean_exit(int status, const char *msg);
  80 int handle_connect(int accept_fd);
  81 void audiod_status_dump(void);
  82
  83 /** iterate over all slots */
  84 #define FOR_EACH_SLOT(_slot) for (_slot = 0; _slot < MAX_STREAM_SLOTS; _slot++)