[player] Add config option high_resolution_clock

forked-daapd.conf.in

@@ -37,6 +37,11 @@ general {
 	# When starting playback, autoselect speaker (if none of the previously
 	# selected speakers/outputs are available)
 #	speaker_autoselect = yes
+
+	# Most modern systems have a high-resolution clock, but if you are on an
+	# unusual platform and experience audio drop-outs, you can try changing
+	# this option
+#	high_resolution_clock = yes
 }
 
 # Library configuration

src/conffile.c

@@ -56,6 +56,11 @@ static cfg_opt_t sec_general[] =
     CFG_STR("cache_path", STATEDIR "/cache/" PACKAGE "/cache.db", CFGF_NONE),
     CFG_INT("cache_daap_threshold", 1000, CFGF_NONE),
     CFG_BOOL("speaker_autoselect", cfg_true, CFGF_NONE),
+#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
+    CFG_BOOL("high_resolution_clock", cfg_false, CFGF_NONE),
+#else
+    CFG_BOOL("high_resolution_clock", cfg_true, CFGF_NONE),
+#endif
     CFG_STR("allow_origin", "*", CFGF_NONE),
     CFG_END()
   };

src/player.c

@@ -3173,13 +3173,12 @@ player_init(void)
       return -1;
     }
 
-#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
-  /* FreeBSD will report a resolution of 1, but actually has a resolution
-   * larger than an audio packet
-   */
-  if (timer_res.tv_nsec == 1)
-    timer_res.tv_nsec = 2 * AIRTUNES_V2_STREAM_PERIOD;
-#endif
+  if (!cfg_getbool(cfg_getsec(cfg, "general"), "high_resolution_clock"))
+    {
+      DPRINTF(E_INFO, L_PLAYER, "High resolution clock not enabled on this system (res is %ld)\n", timer_res.tv_nsec);
+
+      timer_res.tv_nsec = 2 * AIRTUNES_V2_STREAM_PERIOD;
+    }
 
   // Set the tick interval for the playback timer
   interval = MAX(timer_res.tv_nsec, AIRTUNES_V2_STREAM_PERIOD);