Limit the sound buffer cache to 15MB

apps/openmw/mwsound/openal_output.cpp

@@ -813,6 +813,17 @@ void OpenAL_Output::unloadSound(Sound_Handle data)
     alDeleteBuffers(1, &buffer);
 }
 
+size_t OpenAL_Output::getSoundDataSize(Sound_Handle data) const
+{
+    ALuint buffer = GET_PTRID(data);
+    ALint size = 0;
+
+    alGetBufferi(buffer, AL_SIZE, &size);
+    throwALerror();
+
+    return (ALuint)size;
+}
+
 
 MWBase::SoundPtr OpenAL_Output::playSound(Sound_Handle data, float vol, float basevol, float pitch, int flags,float offset)
 {

apps/openmw/mwsound/openal_output.hpp

@@ -35,6 +35,7 @@ namespace MWSound
 
         virtual Sound_Handle loadSound(const std::string &fname, Sound_Loudness *loudness);
         virtual void unloadSound(Sound_Handle data);
+        virtual size_t getSoundDataSize(Sound_Handle data) const;
 
         /// @param offset Value from [0,1] meaning from which fraction the sound the playback starts.
         virtual MWBase::SoundPtr playSound(Sound_Handle data, float vol, float basevol, float pitch, int flags, float offset);

apps/openmw/mwsound/sound_output.hpp

@@ -25,6 +25,7 @@ namespace MWSound
 
         virtual Sound_Handle loadSound(const std::string &fname, Sound_Loudness *loudness=0) = 0;
         virtual void unloadSound(Sound_Handle data) = 0;
+        virtual size_t getSoundDataSize(Sound_Handle data) const = 0;
 
         /// @param offset Value from [0,1] meaning from which fraction the sound the playback starts.
         virtual MWBase::SoundPtr playSound(Sound_Handle data, float vol, float basevol, float pitch, int flags, float offset) = 0;

apps/openmw/mwsound/soundmanagerimp.cpp

@@ -40,6 +40,7 @@ namespace MWSound
         , mMusicVolume(1.0f)
         , mVoiceVolume(1.0f)
         , mFootstepsVolume(1.0f)
+        , mBufferCacheSize(0)
         , mListenerUnderwater(false)
         , mListenerPos(0,0,0)
         , mListenerDir(1,0,0)
@@ -165,6 +166,19 @@ namespace MWSound
         }
 
         sfxiter->second.mHandle = mOutput->loadSound(sfxiter->second.mResourceName);
+        mBufferCacheSize += mOutput->getSoundDataSize(sfxiter->second.mHandle);
+        // NOTE: Max sound buffer cache size is 15MB. Make configurable?
+        while(mBufferCacheSize > 15*1024*1024)
+        {
+            if(mUnusedBuffers.empty())
+            {
+                std::cerr<< "No unused sound buffers to free, using "<<mBufferCacheSize<<" bytes!" <<std::endl;
+                break;
+            }
+            SoundSet::iterator iter = mUnusedBuffers.begin();
+            mBufferCacheSize -= mOutput->getSoundDataSize(*iter);
+            mUnusedBuffers.erase(iter);
+        }
         mUnusedBuffers.insert(sfxiter->second.mHandle);
 
         return &sfxiter->second;

apps/openmw/mwsound/soundmanagerimp.hpp

@@ -49,6 +49,7 @@ namespace MWSound
 
         typedef std::map<std::string,Sound_Buffer> NameBufferMap;
         NameBufferMap mSoundBuffers;
+        size_t mBufferCacheSize;
         // Should stream voices, but that requires handling the "lip" data
         // separately from buffer loading.
         NameBufferMap mVoiceSoundBuffers;