Minor AY8910 performance improvement

drhelius · Jan 14, 2024 · 1afc7dd · 1afc7dd
1 parent 4c0d58d
commit 1afc7dd
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Showing 2 changed files with 4 additions and 3 deletions.
diff --git a/src/AY8910.cpp b/src/AY8910.cpp
@@ -38,6 +38,7 @@ void AY8910::Init(int clockRate)
 void AY8910::Reset(int clockRate)
 {
  m_iClockRate = clockRate;
+ m_iCyclesPerSample = m_iClockRate / GC_AUDIO_SAMPLE_RATE;
 
  for (int i = 0; i < 16; i++)
  {
@@ -300,10 +301,9 @@ void AY8910::Sync()
  }
 
  m_iSampleCounter++;
- int cyclesPerSample = m_iClockRate / GC_AUDIO_SAMPLE_RATE;
- if (m_iSampleCounter >= cyclesPerSample)
+ if (m_iSampleCounter >= m_iCyclesPerSample)
  {
- m_iSampleCounter -= cyclesPerSample;
+ m_iSampleCounter -= m_iCyclesPerSample;
  m_CurrentSample = 0;
 
  for (int i = 0; i < 3; i++)

diff --git a/src/AY8910.h b/src/AY8910.h
@@ -61,6 +61,7 @@ class AY8910
  bool m_Sign[3];
  int m_iCycleCounter;
  int m_iSampleCounter;
+ int m_iCyclesPerSample;
  s16* m_pBuffer;
  int m_iBufferIndex;
  int m_ElapsedCycles;