7e2e2769985f08efcf3227db068e2d7b155ab564
[paraslash.git] / 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++)