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Changed SDL audio locks to not be called as often. Gives slight performance increase.

This commit is contained in:
mjbudd77 2021-08-08 14:28:10 -04:00
parent 52b5ee51f4
commit f834069180
1 changed files with 40 additions and 27 deletions
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67
src/drivers/Qt/sdl-sound.cpp
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@ -284,7 +284,7 @@ WriteSound(int32 *buf,
if ( s_BufferIn >= s_BufferSize50 )
{
ovrFlowSkip += 1000;
ovrFlowSkip += 100;
}
}
else
@ -312,17 +312,23 @@ WriteSound(int32 *buf,
if ( uflowMode )
{ // Underflow mode
SDL_LockAudio();
while (Count)
{
while (s_BufferIn == s_BufferSize)
if ( s_BufferIn == s_BufferSize )
{
SDL_Delay(1); waitCount++;
if ( waitCount > 1000 )
SDL_UnlockAudio();
while (s_BufferIn == s_BufferSize)
{
printf("Error: Sound sink is not draining... Breaking out of audio loop to prevent lockup.\n");
return;
SDL_Delay(1); waitCount++;
if ( waitCount > 1000 )
{
printf("Error: Sound sink is not draining... Breaking out of audio loop to prevent lockup.\n");
return;
}
}
SDL_LockAudio();
}
for (int i=0; i<udrFlowDup; i++)
@ -330,14 +336,13 @@ WriteSound(int32 *buf,
s_Buffer[s_BufferWrite] = *buf;
s_BufferWrite = (s_BufferWrite + 1) % s_BufferSize;
SDL_LockAudio();
s_BufferIn++;
SDL_UnlockAudio();
}
Count--;
buf++;
}
SDL_UnlockAudio();
}
else
{
@ -345,43 +350,53 @@ WriteSound(int32 *buf,
{ // Perfect one to one realtime
skipCounter = 0;
SDL_LockAudio();
while (Count)
{
while (s_BufferIn == s_BufferSize)
if (s_BufferIn == s_BufferSize)
{
SDL_Delay(1); waitCount++;
if ( waitCount > 1000 )
SDL_UnlockAudio();
while (s_BufferIn == s_BufferSize)
{
printf("Error: Sound sink is not draining... Breaking out of audio loop to prevent lockup.\n");
return;
SDL_Delay(1); waitCount++;
if ( waitCount > 1000 )
{
printf("Error: Sound sink is not draining... Breaking out of audio loop to prevent lockup.\n");
return;
}
}
SDL_LockAudio();
}
s_Buffer[s_BufferWrite] = *buf;
Count--;
s_BufferWrite = (s_BufferWrite + 1) % s_BufferSize;
SDL_LockAudio();
s_BufferIn++;
SDL_UnlockAudio();
buf++;
}
SDL_UnlockAudio();
}
else
{ // Overflow mode
SDL_LockAudio();
while (Count)
{
while (s_BufferIn == s_BufferSize)
if (s_BufferIn == s_BufferSize)
{
SDL_Delay(1); waitCount++;
if ( waitCount > 1000 )
SDL_UnlockAudio();
while (s_BufferIn == s_BufferSize)
{
printf("Error: Sound sink is not draining... Breaking out of audio loop to prevent lockup.\n");
return;
SDL_Delay(1); waitCount++;
if ( waitCount > 1000 )
{
printf("Error: Sound sink is not draining... Breaking out of audio loop to prevent lockup.\n");
return;
}
}
SDL_LockAudio();
}
if ( skipCounter >= ovrFlowSkip )
@ -389,9 +404,7 @@ WriteSound(int32 *buf,
s_Buffer[s_BufferWrite] = *buf;
s_BufferWrite = (s_BufferWrite + 1) % s_BufferSize;
SDL_LockAudio();
s_BufferIn++;
SDL_UnlockAudio();
skipCounter -= ovrFlowSkip;
}
@ -400,7 +413,7 @@ WriteSound(int32 *buf,
Count--;
buf++;
}
SDL_UnlockAudio();
}
}