ShuriZma
/
stella
mirror of https://github.com/stella-emu/stella.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

Dynamically adjust fragment buffer size based on fragmen size and period.

This commit is contained in:
Christian Speckner 2018-01-29 00:08:50 +01:00
parent 13eefbb542
commit f87316bfdb
2 changed files with 10 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
src/common/SoundSDL2.cxx
View File

@ -44,7 +44,8 @@ SoundSDL2::SoundSDL2(OSystem& osystem)
myVolume(100), myVolume(100),
myVolumeFactor(0xffff), myVolumeFactor(0xffff),
myAudioQueue(0), myAudioQueue(0),
myCurrentFragment(0) myCurrentFragment(0),
myFragmentBufferSize(0)
{ {
myOSystem.logMessage("SoundSDL2::SoundSDL2 started ...", 2); myOSystem.logMessage("SoundSDL2::SoundSDL2 started ...", 2);
@ -124,6 +125,12 @@ void SoundSDL2::open(shared_ptr<AudioQueue> audioQueue)
myCurrentFragment = 0; myCurrentFragment = 0;
myTimeIndex = 0; myTimeIndex = 0;
myFragmentIndex = 0; myFragmentIndex = 0;
myFragmentBufferSize = static_cast<uInt32>(
ceil(
1.5 * static_cast<double>(myHardwareSpec.samples) / static_cast<double>(myAudioQueue->fragmentSize())
* static_cast<double>(myAudioQueue->sampleRate()) / static_cast<double>(myHardwareSpec.freq)
)
);
// Adjust volume to that defined in settings // Adjust volume to that defined in settings
setVolume(myOSystem.settings().getInt("volume")); setVolume(myOSystem.settings().getInt("volume"));
@ -215,7 +222,7 @@ void SoundSDL2::adjustVolume(Int8 direction)
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
void SoundSDL2::processFragment(Int16* stream, uInt32 length) void SoundSDL2::processFragment(Int16* stream, uInt32 length)
{ {
if (myUnderrun && myAudioQueue->size() > 1) { if (myUnderrun && myAudioQueue->size() > myFragmentBufferSize) {
myUnderrun = false; myUnderrun = false;
myCurrentFragment = myAudioQueue->dequeue(myCurrentFragment); myCurrentFragment = myAudioQueue->dequeue(myCurrentFragment);
myFragmentIndex = 0; myFragmentIndex = 0;

1
src/common/SoundSDL2.hxx
View File

@ -123,6 +123,7 @@ class SoundSDL2 : public Sound
Int16* myCurrentFragment; Int16* myCurrentFragment;
uInt32 myTimeIndex; uInt32 myTimeIndex;
uInt32 myFragmentIndex; uInt32 myFragmentIndex;
uInt32 myFragmentBufferSize;
bool myUnderrun; bool myUnderrun;
private: private: