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Add config options for the sound buffer cache size

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The cache size is specified with a min/max range, intended to avoid constant
unloading once the limit is reached. This way, buffers can be unloaded down to
a reasonable mimimum, allowing some more buffers to be subsequently loaded
without causing more unloading.
This commit is contained in:
Chris Robinson 2015-11-26 02:13:37 -08:00
parent b61c0c989f
commit d4238a6d91
3 changed files with 29 additions and 12 deletions
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30
apps/openmw/mwsound/soundmanagerimp.cpp
View file

@ -66,6 +66,11 @@ namespace MWSound
mFootstepsVolume = Settings::Manager::getFloat("footsteps volume", "Sound");
mFootstepsVolume = std::min(std::max(mFootstepsVolume, 0.0f), 1.0f);
mBufferCacheMin = std::max(Settings::Manager::getInt("buffer cache min", "Sound"), 1);
mBufferCacheMax = std::max(Settings::Manager::getInt("buffer cache max", "Sound"), 1);
mBufferCacheMax *= 1024*1024;
mBufferCacheMin = std::min(mBufferCacheMin*1024*1024, mBufferCacheMax);
std::cout << "Sound output: " << SOUND_OUT << std::endl;
std::cout << "Sound decoder: " << SOUND_IN << std::endl;
@ -184,21 +189,22 @@ namespace MWSound
sfx->mHandle = mOutput->loadSound(sfx->mResourceName);
mBufferCacheSize += mOutput->getSoundDataSize(sfx->mHandle);
// NOTE: Max sound buffer cache size is 15MB. Make configurable?
while(mBufferCacheSize > 15*1024*1024)
if(mBufferCacheSize > mBufferCacheMax)
{
if(mUnusedBuffers.empty())
{
std::cerr<< "No unused sound buffers to free, using "<<mBufferCacheSize<<" bytes!" <<std::endl;
break;
}
Sound_Buffer *unused = mUnusedBuffers.back();
do {
if(mUnusedBuffers.empty())
{
std::cerr<< "No unused sound buffers to free, using "<<mBufferCacheSize<<" bytes!" <<std::endl;
break;
}
Sound_Buffer *unused = mUnusedBuffers.back();
mBufferCacheSize -= mOutput->getSoundDataSize(unused->mHandle);
mOutput->unloadSound(unused->mHandle);
unused->mHandle = 0;
mBufferCacheSize -= mOutput->getSoundDataSize(unused->mHandle);
mOutput->unloadSound(unused->mHandle);
unused->mHandle = 0;
mUnusedBuffers.pop_back();
mUnusedBuffers.pop_back();
} while(mBufferCacheSize > mBufferCacheMin);
}
mUnusedBuffers.push_front(sfx);
}

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

@ -56,6 +56,8 @@ namespace MWSound
// back, allowing existing Sound_Buffer references/pointers to remain
// valid.
SoundBufferList mSoundBuffers;
size_t mBufferCacheMin;
size_t mBufferCacheMax;
size_t mBufferCacheSize;
typedef std::map<std::string,Sound_Buffer*> NameBufferMap;

9
files/settings-default.cfg
View file

@ -165,6 +165,15 @@ sfx volume = 1.0
# Voice dialog volume.
voice volume = 0.8
# Minimum size to use for the sound buffer cache, in MB. When the cache is
# filled, old buffers will be unloaded until it's using no more than this much
# memory. Must be less than or equal to 'buffer cache max'.
buffer cache min = 14
# Maximum size to use for the sound buffer cache, in MB. The cache can use up
# to this much memory until old buffers get purged.
buffer cache max = 16
[Video]
# Resolution of the OpenMW window or screen.