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Fixed: #1030 Implement music streaming in OpenAL driver

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This commit is contained in:
kervala 2010-07-27 19:22:19 +02:00
parent f0205328dc
commit 8dff836491
2 changed files with 151 additions and 33 deletions
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154
code/nel/src/sound/driver/openal/source_al.cpp
View file

@ -28,7 +28,7 @@ using namespace NLMISC;
namespace NLSOUND {
CSourceAL::CSourceAL(CSoundDriverAL *soundDriver) :
_SoundDriver(NULL), _Buffer(NULL), _Source(AL_NONE),
_SoundDriver(NULL), _Buffer(NULL), _BuffersMax(0), _BufferSize(32768), _Source(AL_NONE),
_DirectFilter(AL_FILTER_NULL), _EffectFilter(AL_FILTER_NULL),
_IsPlaying(false), _IsPaused(false),
_Pos(0.0f, 0.0f, 0.0f), _Gain(NLSOUND_DEFAULT_GAIN), _Alpha(1.0),
@ -44,7 +44,7 @@ _DirectFilterPassGain(NLSOUND_DEFAULT_FILTER_PASS_GAIN), _EffectFilterPassGain(N
alTestError();
// configure rolloff
if (soundDriver->getOption(ISoundDriver::OptionManualRolloff))
if (!soundDriver || soundDriver->getOption(ISoundDriver::OptionManualRolloff))
{
alSourcef(_Source, AL_ROLLOFF_FACTOR, 0);
alTestError();
@ -56,7 +56,7 @@ _DirectFilterPassGain(NLSOUND_DEFAULT_FILTER_PASS_GAIN), _EffectFilterPassGain(N
}
// create filters
if (soundDriver->getOption(ISoundDriver::OptionEnvironmentEffects))
if (soundDriver && soundDriver->getOption(ISoundDriver::OptionEnvironmentEffects))
{
alGenFilters(1, &_DirectFilter);
alFilteri(_DirectFilter, AL_FILTER_TYPE, AL_FILTER_LOWPASS);
@ -83,6 +83,8 @@ CSourceAL::~CSourceAL()
void CSourceAL::release()
{
unqueueBuffers();
removeBuffers();
if (_Source != AL_NONE) { alDeleteSources(1, &_Source); _Source = AL_NONE; }
if (_DirectFilter != AL_FILTER_NULL) { alDeleteFilters(1, &_DirectFilter); _DirectFilter = AL_FILTER_NULL; }
if (_EffectFilter != AL_FILTER_NULL) { alDeleteFilters(1, &_EffectFilter); _EffectFilter = AL_FILTER_NULL; }
@ -153,9 +155,14 @@ void CSourceAL::submitStreamingBuffer(IBuffer *buffer)
CBufferAL *bufferAL = static_cast<CBufferAL *>(buffer);
ALuint bufferName = bufferAL->bufferName();
nlassert(bufferName);
// search if it's in buffers vector
if (_Buffers.find(bufferName) == _Buffers.end())
return;
// queue the buffer
alSourceQueueBuffers(_Source, 1, &bufferName);
alTestError();
_QueuedBuffers.push(bufferAL);
// Resume playback if the internal OpenAL source stopped due to buffer underrun.
ALint srcstate;
@ -171,23 +178,11 @@ void CSourceAL::submitStreamingBuffer(IBuffer *buffer)
/// Return the amount of buffers in the queue (playing and waiting). 3 buffers is optimal.
uint CSourceAL::countStreamingBuffers() const
{
// a bit ugly here, but makes a much easier/simpler implementation on both drivers
ALint buffersProcessed;
alGetSourcei(_Source, AL_BUFFERS_PROCESSED, &buffersProcessed);
while (buffersProcessed)
{
ALuint bufferName = _QueuedBuffers.front()->bufferName();
alSourceUnqueueBuffers(_Source, 1, &bufferName);
alTestError();
const_cast<std::queue<CBufferAL *> &>(_QueuedBuffers).pop();
--buffersProcessed;
}
// return how many are left in the queue
//ALint buffersQueued;
//alGetSourcei(_SourceName, AL_BUFFERS_QUEUED, &buffersQueued);
//alTestError();
//return (uint)buffersQueued;
return (uint)_QueuedBuffers.size();
ALint buffersQueued;
alGetSourcei(_Source, AL_BUFFERS_QUEUED, &buffersQueued);
alTestError();
return (uint)buffersQueued;
}
/// Set looping on/off for future playbacks (default: off)
@ -248,14 +243,8 @@ void CSourceAL::stop()
_IsPaused = false;
alSourceStop(_Source);
alTestError();
// unqueue buffers
while (_QueuedBuffers.size())
{
ALuint bufferName = _QueuedBuffers.front()->bufferName();
alSourceUnqueueBuffers(_Source, 1, &bufferName);
_QueuedBuffers.pop();
alTestError();
}
unqueueBuffers();
// Streaming mode
//nlwarning("AL: Cannot stop null buffer; streaming not implemented" );
//nlstop;
@ -403,7 +392,7 @@ void CSourceAL::getDirection( NLMISC::CVector& dir ) const
void CSourceAL::setGain(float gain)
{
_Gain = std::min(std::max(gain, NLSOUND_MIN_GAIN), NLSOUND_MAX_GAIN);
if (!_SoundDriver->getOption(ISoundDriver::OptionManualRolloff))
if ((_SoundDriver == NULL) || !_SoundDriver->getOption(ISoundDriver::OptionManualRolloff))
{
alSourcef(_Source, AL_GAIN, _Gain);
alTestError();
@ -458,7 +447,7 @@ void CSourceAL::setMinMaxDistances( float mindist, float maxdist, bool /* deferr
nlassert( (mindist >= 0.0f) && (maxdist >= 0.0f) );
_MinDistance = mindist;
_MaxDistance = maxdist;
if (!_SoundDriver->getOption(ISoundDriver::OptionManualRolloff))
if ((_SoundDriver == NULL) || !_SoundDriver->getOption(ISoundDriver::OptionManualRolloff))
{
alSourcef(_Source, AL_REFERENCE_DISTANCE, mindist);
alSourcef(_Source, AL_MAX_DISTANCE, maxdist);
@ -760,4 +749,109 @@ float CSourceAL::getEffectFilterPassGain() const
return _EffectFilterPassGain;
}
/// Get already processed buffers and unqueue them
void CSourceAL::getProcessedStreamingBuffers(std::vector<CBufferAL*> &buffers)
{
// get the number of processed buffers
ALint buffersProcessed;
alGetSourcei(_Source, AL_BUFFERS_PROCESSED, &buffersProcessed);
alTestError();
// exit if more processed buffer than allocated ones
if ((uint)buffersProcessed > _BuffersMax) return;
// unqueue all previously processed buffers and get their name
alSourceUnqueueBuffers(_Source, buffersProcessed, &(_BuffersName[0]));
alTestError();
// add each processed buffer to the array
for(uint i = 0; i < (uint)buffersProcessed; ++i)
{
// if buffer is found, return it
std::map<uint, CBufferAL*>::const_iterator it = _Buffers.find(_BuffersName[i]);
if (it != _Buffers.end())
buffers.push_back(it->second);
}
}
/// Get all existing buffers
void CSourceAL::getStreamingBuffers(std::vector<CBufferAL*> &buffers)
{
std::map<uint, CBufferAL*>::const_iterator it = _Buffers.begin(), iend = _Buffers.end();
while(it != iend)
{
buffers.push_back(it->second);
++it;
}
}
/// Unqueue all buffers
void CSourceAL::unqueueBuffers()
{
// get count of buffers in queue
uint count = countStreamingBuffers();
if (count > 0)
{
// unqueue all of them
alSourceUnqueueBuffers(_Source, count, &(_BuffersName[0]));
alTestError();
}
}
/// Delete all allocated buffers
void CSourceAL::removeBuffers()
{
// delete each buffer
std::map<uint, CBufferAL*>::const_iterator it = _Buffers.begin(), iend = _Buffers.end();
while(it != iend)
{
delete it->second;
++it;
}
_Buffers.clear();
}
/// Get available streaming buffers count
uint CSourceAL::getStreamingBuffersMax() const
{
return _BuffersMax;
}
/// Set available streaming buffers count and allocate them
void CSourceAL::setStreamingBuffersMax(uint buffers)
{
// remember previous value
uint oldBuffersMax = _BuffersMax;
_BuffersMax = buffers;
// resize the temporary buffer names array
_BuffersName.resize(buffers);
// remove all buffers
unqueueBuffers();
removeBuffers();
for(uint i = 0; i < _BuffersMax; ++i)
{
// create a new buffer
CBufferAL *buffer = static_cast<CBufferAL*>(_SoundDriver->createBuffer());
_Buffers[buffer->bufferName()] = buffer;
}
}
/// Set the default size for streaming buffers
void CSourceAL::setStreamingBufferSize(uint size)
{
_BufferSize = size;
}
/// Get the default size for streaming buffers
uint CSourceAL::getStreamingBufferSize() const
{
return _BufferSize;
}
} // NLSOUND

26
code/nel/src/sound/driver/openal/source_al.h
View file

@ -49,7 +49,15 @@ private:
/// Assigned buffer object
CBufferAL *_Buffer;
std::queue<CBufferAL *> _QueuedBuffers;
/// Queued buffers map (uint is buffer name)
std::map<uint, CBufferAL *> _Buffers;
/// Temporary queued buffers array
std::vector<ALuint> _BuffersName;
/// Max count of queued buffers allowed
uint _BuffersMax;
/// Default size of a buffer
uint _BufferSize;
/// AL Handles
ALuint _Source;
@ -252,6 +260,22 @@ public:
virtual float getEffectFilterPassGain() const;
//@}
/// Get already processed buffers and unqueue them
void getProcessedStreamingBuffers(std::vector<CBufferAL*> &buffers);
/// Get all existing buffers
void getStreamingBuffers(std::vector<CBufferAL*> &buffers);
/// Unqueue all buffers
void unqueueBuffers();
/// Delete all allocated buffers
void removeBuffers();
/// Get available streaming buffers count
uint getStreamingBuffersMax() const;
/// Set available streaming buffers count and allocate them
void setStreamingBuffersMax(uint max);
/// Set the default size for streaming buffers
void setStreamingBufferSize(uint size);
/// Get the default size for streaming buffers
uint getStreamingBufferSize() const;
};
} // NLSOUND