X-Git-Url: http://review.tizen.org/git/?a=blobdiff_plain;f=src%2Fmodules%2Falsa%2Falsa-util.c;h=b8d135758439bc18c80a2b245f69cb3e7a21df44;hb=53b046d5c9593d848270e85017c2999a61256e0e;hp=0e22d17e467aaca47d8f004940a3a5461717204d;hpb=c079ceeba00c77a93c613ecf4a3f2cb516db0753;p=platform%2Fupstream%2Fpulseaudio.git

diff --git a/src/modules/alsa/alsa-util.c b/src/modules/alsa/alsa-util.c
index 0e22d17..b8d1357 100644
--- a/src/modules/alsa/alsa-util.c
+++ b/src/modules/alsa/alsa-util.c
@@ -43,6 +43,7 @@
 #include <pulsecore/once.h>
 #include <pulsecore/thread.h>
 #include <pulsecore/conf-parser.h>
+#include <pulsecore/core-rtclock.h>
 
 #include "alsa-util.h"
 #include "alsa-mixer.h"
@@ -1308,3 +1309,26 @@ const char* pa_alsa_strerror(int errnum) {
 
     return translated;
 }
+
+pa_bool_t pa_alsa_may_tsched(pa_bool_t want) {
+
+    if (!want)
+        return FALSE;
+
+    if (!pa_rtclock_hrtimer()) {
+        /* We cannot depend on being woken up in time when the timers
+        are inaccurate, so let's fallback to classic IO based playback
+        then. */
+        pa_log_notice("Disabling timer-based scheduling because high-resolution timers are not available from the kernel.");
+        return FALSE; }
+
+    if (pa_running_in_vm()) {
+        /* We cannot depend on being woken up when we ask for in a VM,
+         * so let's fallback to classic IO based playback then. */
+        pa_log_notice("Disabling timer-based scheduling because running inside a VM.");
+        return FALSE;
+    }
+
+
+    return TRUE;
+}