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Code Issues Releases Wiki Activity

Enforce a 15MB limit on the sound buffer cache

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This commit is contained in:
Chris Robinson 2012-03-19 13:19:22 -07:00
parent 04638516b2
commit fd37a4827c
2 changed files with 37 additions and 1 deletions
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36
apps/openmw/mwsound/openal_output.cpp
View file

@ -469,13 +469,46 @@ ALuint OpenAL_Output::getBuffer(const std::string &fname)
mBufferCache[fname] = buf;
mBufferRefs[buf] = 1;
ALint bufsize = 0;
alGetBufferi(buf, AL_SIZE, &bufsize);
mBufferCacheMemSize += bufsize;
// NOTE: Max buffer cache: 15MB
while(mBufferCacheMemSize > 15*1024*1024)
{
if(mUnusedBuffers.empty())
{
std::cout <<"No more unused buffers to clear!"<< std::endl;
break;
}
ALuint oldbuf = mUnusedBuffers.front();
mUnusedBuffers.pop_front();
NameMap::iterator nameiter = mBufferCache.begin();
while(nameiter != mBufferCache.end())
{
if(nameiter->second == oldbuf)
mBufferCache.erase(nameiter++);
else
nameiter++;
}
bufsize = 0;
alGetBufferi(oldbuf, AL_SIZE, &bufsize);
alDeleteBuffers(1, &oldbuf);
mBufferCacheMemSize -= bufsize;
}
return buf;
}
void OpenAL_Output::bufferFinished(ALuint buf)
{
if(mBufferRefs.at(buf)-- == 1)
{
mBufferRefs.erase(mBufferRefs.find(buf));
mUnusedBuffers.push_back(buf);
}
}
@ -679,7 +712,8 @@ void OpenAL_Output::updateListener(const float *pos, const float *atdir, const f
OpenAL_Output::OpenAL_Output(SoundManager &mgr)
: Sound_Output(mgr), mDevice(0), mContext(0), mStreamThread(new StreamThread)
: Sound_Output(mgr), mDevice(0), mContext(0), mBufferCacheMemSize(0),
mStreamThread(new StreamThread)
{
}

2
apps/openmw/mwsound/openal_output.hpp
View file

@ -33,6 +33,8 @@ namespace MWSound
typedef std::deque<ALuint> IDDq;
IDDq mUnusedBuffers;
uint64_t mBufferCacheMemSize;
ALuint getBuffer(const std::string &fname);
void bufferFinished(ALuint buffer);