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Code Issues Releases Wiki Activity

Use 6 125ms buffers for OpenAL streams

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This commit is contained in:
Chris Robinson 2012-03-19 05:29:04 -07:00
parent dc6354b2f9
commit 8f9d4ff841
3 changed files with 31 additions and 4 deletions
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12
apps/openmw/mwsound/openal_output.cpp
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@ -53,8 +53,8 @@ static ALenum getALFormat(ChannelConfig chans, SampleType type)
//
class OpenAL_SoundStream : public Sound
{
static const ALuint sNumBuffers = 4;
static const ALuint sBufferSize = 32768;
static const ALuint sNumBuffers = 6;
static const ALfloat sBufferLength = 0.125f;
OpenAL_Output &mOutput;
@ -63,6 +63,7 @@ class OpenAL_SoundStream : public Sound
ALenum mFormat;
ALsizei mSampleRate;
ALuint mBufferSize;
DecoderPtr mDecoder;
@ -171,6 +172,9 @@ OpenAL_SoundStream::OpenAL_SoundStream(OpenAL_Output &output, DecoderPtr decoder
mDecoder->getInfo(&srate, &chans, &type);
mFormat = getALFormat(chans, type);
mSampleRate = srate;
mBufferSize = static_cast<ALuint>(sBufferLength*srate);
mBufferSize = framesToBytes(mBufferSize, chans, type);
}
catch(std::exception &e)
{
@ -193,7 +197,7 @@ OpenAL_SoundStream::~OpenAL_SoundStream()
void OpenAL_SoundStream::play(float volume, float pitch)
{
std::vector<char> data(sBufferSize);
std::vector<char> data(mBufferSize);
alSourceStop(mSource);
alSourcei(mSource, AL_BUFFER, 0);
@ -251,7 +255,7 @@ bool OpenAL_SoundStream::process()
if(processed > 0)
{
std::vector<char> data(sBufferSize);
std::vector<char> data(mBufferSize);
do {
ALuint bufid;
size_t got;

3
apps/openmw/mwsound/sound_decoder.hpp
View file

@ -17,6 +17,9 @@ namespace MWSound
};
const char *getChannelConfigName(ChannelConfig config);
size_t framesToBytes(size_t frames, ChannelConfig config, SampleType type);
size_t bytesToFrames(size_t bytes, ChannelConfig config, SampleType type);
class Sound_Decoder
{
public:

20
apps/openmw/mwsound/soundmanager.cpp
View file

@ -485,4 +485,24 @@ namespace MWSound
}
return "(unknown channel config)";
}
size_t framesToBytes(size_t frames, ChannelConfig config, SampleType type)
{
switch(config)
{
case ChannelConfig_Mono: frames *= 1; break;
case ChannelConfig_Stereo: frames *= 2; break;
}
switch(type)
{
case SampleType_UInt8: frames *= 1; break;
case SampleType_Int16: frames *= 2; break;
}
return frames;
}
size_t bytesToFrames(size_t bytes, ChannelConfig config, SampleType type)
{
return bytes / framesToBytes(1, config, type);
}
}