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implemented source reservation per priority-level in sound scheduler: aborting early is better than reassigning during playback

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git-svn-id: svn://svn.code.sf.net/p/actiongame/code/trunk/ac@2740 e016b1c5-ed68-44aa-a2f7-31cac88cffde
This commit is contained in:
driAn
2008-09-23 22:08:15 +00:00
parent 3b906f56ca
commit 672347af13
1 changed files with 27 additions and 8 deletions
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source/src/sound.cpp
+27 -8
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@@ -305,9 +305,11 @@ struct source
VARP(soundschedpriorityscore, 0, 100, 1000);
VARP(soundscheddistancescore, 0, 5, 1000);
VARP(soundschedoldbonus, 0, 100, 1000);
VARP(soundschedreserve, 0, 2, 100);
// AC sound scheduler, manages available sound sources
// under load it uses priority and distance information to reassign its resources
// AC sound scheduler, manages available sound sources.
// It keeps a set of reserved sources for each priority level to avoid running out of sources by floods of low-priority sounds.
// Under load it uses priority and distance information to reassign its resources.
extern int soundchannels;
@@ -355,22 +357,39 @@ struct sourcescheduler
source *newsource(int priority, const vec &o)
{
if(!sources.length())
{
DEBUG("empty source collection");
return NULL;
}
source *src = NULL;
if(sources.length())
// reserve some sources for sounds of higher priority
int reserved = (SP_HIGHEST-priority)*soundschedreserve;
DEBUGVAR(reserved);
// search unused source
loopv(sources)
{
// search unused source
loopv(sources) if(!sources[i]->locked)
if(!sources[i]->locked && reserved--<=0)
{
src = sources[i];
DEBUGVAR(src);
break;
}
}
if(!src)
{
DEBUG("no empty source found");
// low priority sounds can't replace others
if(SP_LOW==priority) return NULL;
if(SP_LOW==priority)
{
DEBUG("low prio sound aborted");
return NULL;
}
// try replacing a used source
// score our sound
@@ -400,14 +419,14 @@ struct sourcescheduler
if(worstsource && score>worstscore)
{
src = worstsource;
DEBUG("ac sound sched: replaced sound of same prio");
src->onreassign(); // inform previous owner about the take-over
DEBUG("replaced sound of same prio");
}
}
if(!src)
{
DEBUG("ac sound sched: sound aborted, no channel takeover possible");
DEBUG("sound aborted, no channel takeover possible");
return NULL;
}