audiod: Make struct slot_info local to audiod.c.

[paraslash.git] / audiod.c

diff --git a/audiod.c b/audiod.c
index e73d14135b855b77f361a020d5c0484c4842b13f..1f226265b0c9c79593f255bba4805cfdb8a53e9a 100644 (file)
--- a/audiod.c
+++ b/audiod.c
@@ -68,6 +68,30 @@ struct audio_format_info {
        struct timeval restart_barrier;
 };
 
+/* Describes one instance of a receiver-filter-writer chain. */
+struct slot_info {
+       /* Number of the audio format in this slot. */
+       int format;
+       /* The stream_start status item announced by para_server.  */
+       struct timeval server_stream_start;
+       /* The offset status item announced by para_server. */
+       unsigned offset_seconds;
+       /* The seconds_total status item announced by para_server. */
+       unsigned seconds_total;
+       /* The receiver info associated with this slot. */
+       struct receiver_node *receiver_node;
+       /* The array of filter nodes. */
+       struct filter_node *fns;
+       /* The array of writers attached to the last filter. */
+       struct writer_node *wns;
+};
+
+/** Maximal number of simultaneous instances. */
+#define MAX_STREAM_SLOTS 5
+
+/** Iterate over all slots. */
+#define FOR_EACH_SLOT(_slot) for (_slot = 0; _slot < MAX_STREAM_SLOTS; _slot++)
+
 /**
  * para_audiod uses \p MAX_STREAM_SLOTS different slots, each of which may
  * be associated with a receiver/filter/writer triple. This array holds all
@@ -198,6 +222,35 @@ static int get_audio_format_num(const char *name)
        return -E_UNSUPPORTED_AUDIO_FORMAT;
 }
 
+/**
+ * Return the flags for the \a decoder_flags status item.
+ *
+ * Allocates a string which contains one octal digit per slot.  Bit zero (value
+ * 1) is set if a receiver is active. Bit one (value 2) and bit three (value 4)
+ * have the analogous meaning for filter and writer, respectively.
+ *
+ * \return String that must be freed by the caller.
+ */
+__malloc char *audiod_get_decoder_flags(void)
+{
+       int i;
+       char flags[MAX_STREAM_SLOTS + 1];
+
+       FOR_EACH_SLOT(i) {
+               struct slot_info *s = &slot[i];
+               char flag = '0';
+               if (s->receiver_node)
+                       flag += 1;
+               if (s->fns)
+                       flag += 2;
+               if (s->wns)
+                       flag += 4;
+               flags[i] = flag;
+       }
+       flags[MAX_STREAM_SLOTS] = '\0';
+       return para_strdup(flags);
+}
+
 static int get_matching_audio_format_nums(const char *re)
 {
        int i, ret;