Sleep to minimize clock slaving jitter

Before starting audio device, if it makes sense to.

1 files changed, 17 insertions, 0 deletions

diff --git a/src/AudioRenderer.cpp b/src/AudioRenderer.cpp
index 5df133a..04ba0c9 100644
--- a/src/AudioRenderer.cpp
+++ b/src/AudioRenderer.cpp
@@ -457,6 +457,23 @@ namespace SaneAudioRenderer
 

         if (m_device)

         {

+            // Try to minimize clock slaving initial jitter.

+            {

+                REFERENCE_TIME clockTime;

+                m_myClock.GetImmediateTime(&clockTime);

+

+                if (!m_device->IsExclusive())

+                    clockTime += m_device->GetStreamLatency();

+

+                int64_t sleepTime = llMulDiv(m_startTime + m_startClockOffset - clockTime, 1000, OneSecond, 0);

+

+                if (sleepTime > 0 && sleepTime < 200)

+                {

+                    TimePeriodHelper timePeriodHelper(1);

+                    Sleep((DWORD)sleepTime);

+                }

+            }

+

             m_guidedReclockOffset = 0;

             m_myClock.SlaveClockToAudio(m_device->GetClock(), m_startTime + m_startClockOffset);

             m_clockCorrection = 0;