From 81599f89eaaf883f140fbe24487f3d5c43dcb192 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Josef=20S=C3=B6ntgen?= <josef.soentgen@genode-labs.com>
Date: Fri, 8 May 2015 16:42:38 +0200
Subject: [PATCH] os: decrease Audio::PERIOD to lower latency

To archive lower latency the length of a period was reduced from
2048 (~46ms) to 512 (~11.6ms) samples.

It should be noted that this change probably breaks audio in Qemu on
most systems.

Issue #1644.
---
 repos/os/include/audio_out_session/audio_out_session.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/repos/os/include/audio_out_session/audio_out_session.h b/repos/os/include/audio_out_session/audio_out_session.h
index 3f7e5459a..3787312ee 100644
--- a/repos/os/include/audio_out_session/audio_out_session.h
+++ b/repos/os/include/audio_out_session/audio_out_session.h
@@ -50,7 +50,7 @@ namespace Audio_out {
 
 	enum {
 		QUEUE_SIZE  = 16,            /* buffer queue size */
-		PERIOD      = 2048,          /* samples per period */
+		PERIOD      = 512,           /* samples per period (~11.6ms) */
 		SAMPLE_RATE = 44100,
 		SAMPLE_SIZE = sizeof(float),
 	};