30e5b4a99e
Added conversion functions from our audio format enum to OpenAL's in preparation for supporting more formats. Reorganized cAudio defines, made it easier to access some compile time parameters. Fixed a bug where a source could not be played again after it reached the end of its audio stream. Added better checking for sources. IsValid() should provide a more useful indication of whether a source is usable. Added error checking and logging to cAudioCapture. Prevented initializing of cAudioManager until shutdown() has been called. Added a tutorial for Audio Effects. Added a footsteps sound for showing off Audio Effects. Moved the default compile location for the main library to lib/. The msvc project will copy the cAudio.dll to bin/win32-visual/
707 lines
17 KiB
C++
707 lines
17 KiB
C++
#include "../Headers/cAudio.h"
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#include "../Headers/cLogger.h"
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#include "../Headers/cFilter.h"
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#include "../Headers/cEffect.h"
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namespace cAudio
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{
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#ifdef CAUDIO_EFX_ENABLED
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cAudio::cAudio(IAudioDecoder* decoder, ALCcontext* context, cEFXFunctions* oALFunctions)
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: Context(context), Source(0), Decoder(decoder), Loop(false), Valid(false),
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EFX(oALFunctions), Filter(NULL), EffectSlotsAvailable(0), LastFilterTimeStamp(0)
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#else
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cAudio::cAudio(IAudioDecoder* decoder, ALCcontext* context)
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: Context(context), Source(0), Decoder(decoder), Loop(false), Valid(false)
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#endif
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{
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cAudioMutexBasicLock lock(Mutex);
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for(int i=0; i<CAUDIO_SOURCE_NUM_BUFFERS; ++i)
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Buffers[i] = 0;
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#ifdef CAUDIO_EFX_ENABLED
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for(int i=0; i<CAUDIO_SOURCE_MAX_EFFECT_SLOTS; ++i)
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Effects[i] = NULL;
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for(int i=0; i<CAUDIO_SOURCE_MAX_EFFECT_SLOTS; ++i)
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LastEffectTimeStamp[i] = 0;
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#endif
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if(Decoder)
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Decoder->grab();
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//Generates 3 buffers for the ogg file
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alGenBuffers(CAUDIO_SOURCE_NUM_BUFFERS, Buffers);
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bool state = !checkError();
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if(state)
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{
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//Creates one source to be stored.
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alGenSources(1, &Source);
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state = !checkError();
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}
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#ifdef CAUDIO_EFX_ENABLED
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Valid = state && (Decoder != NULL) && (Context != NULL) && (EFX != NULL);
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#else
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Valid = state && (Decoder != NULL) && (Context != NULL);
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#endif
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#ifdef CAUDIO_EFX_ENABLED
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int numSlots = 0;
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ALCdevice* device = alcGetContextsDevice(Context);
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alcGetIntegerv(device, ALC_MAX_AUXILIARY_SENDS, 1, &numSlots);
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EffectSlotsAvailable = (numSlots <= CAUDIO_SOURCE_MAX_EFFECT_SLOTS) ? numSlots : CAUDIO_SOURCE_MAX_EFFECT_SLOTS;
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#endif
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}
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cAudio::~cAudio()
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{
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cAudioMutexBasicLock lock(Mutex);
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if(Decoder)
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Decoder->drop();
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#ifdef CAUDIO_EFX_ENABLED
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for(int i=0; i<CAUDIO_SOURCE_MAX_EFFECT_SLOTS; ++i)
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{
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if(Effects[i])
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Effects[i]->drop();
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Effects[i] = NULL;
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}
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if(Filter)
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Filter->drop();
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Filter = NULL;
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#endif
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}
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bool cAudio::play()
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{
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cAudioMutexBasicLock lock(Mutex);
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if (!isPaused())
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{
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int queueSize = 0;
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//Resets the audio to the beginning
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Decoder->setPosition(0, false);
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//Purges all buffers from the source
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alSourcei(Source, AL_BUFFER, 0);
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checkError();
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for(int u = 0; u < CAUDIO_SOURCE_NUM_BUFFERS; u++)
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{
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int val = stream(Buffers[u]);
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if(val < 0)
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{
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return false;
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}
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else if(val > 0)
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++queueSize;
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}
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//Stores the sources 3 buffers to be used in the queue
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alSourceQueueBuffers(Source, queueSize, Buffers);
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checkError();
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}
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#ifdef CAUDIO_EFX_ENABLED
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updateFilter();
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for(unsigned int i=0; i<CAUDIO_SOURCE_MAX_EFFECT_SLOTS; ++i)
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updateEffect(i);
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#endif
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alSourcePlay(Source);
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checkError();
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getLogger()->logDebug("Audio Source", "Source playing.");
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return true;
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}
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bool cAudio::play2d(const bool& toLoop)
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{
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cAudioMutexBasicLock lock(Mutex);
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alSourcei(Source, AL_SOURCE_RELATIVE, true);
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loop(toLoop);
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bool state = play();
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checkError();
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return state;
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}
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bool cAudio::play3d(const cVector3& position, const float& soundstr, const bool& toLoop)
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{
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cAudioMutexBasicLock lock(Mutex);
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alSourcei(Source, AL_SOURCE_RELATIVE, false);
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setPosition(position);
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setStrength(soundstr);
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loop(toLoop);
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bool state = play();
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checkError();
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return state;
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}
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void cAudio::pause()
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{
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cAudioMutexBasicLock lock(Mutex);
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alSourcePause(Source);
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checkError();
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getLogger()->logDebug("Audio Source", "Source paused.");
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}
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void cAudio::stop()
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{
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cAudioMutexBasicLock lock(Mutex);
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alSourceStop(Source);
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checkError();
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getLogger()->logDebug("Audio Source", "Source stopped.");
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}
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void cAudio::loop(const bool& loop)
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{
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cAudioMutexBasicLock lock(Mutex);
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Loop = loop;
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}
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bool cAudio::seek(const float& seconds, bool relative)
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{
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bool state = false;
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cAudioMutexBasicLock lock(Mutex);
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if(Decoder->isSeekingSupported())
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{
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state = Decoder->seek(seconds, relative);
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}
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return state;
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}
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bool cAudio::update()
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{
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cAudioMutexBasicLock lock(Mutex);
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if(!isValid() || !isPlaying())
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{
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return false;
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}
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int processed = 0;
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bool active = true;
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#ifdef CAUDIO_EFX_ENABLED
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updateFilter();
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for(unsigned int i=0; i<CAUDIO_SOURCE_MAX_EFFECT_SLOTS; ++i)
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updateEffect(i);
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#endif
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//gets the sound source processed buffers
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alGetSourcei(Source, AL_BUFFERS_PROCESSED, &processed);
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//while there is more data refill buffers with audio data.
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while (processed--)
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{
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ALuint buffer;
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alSourceUnqueueBuffers(Source, 1, &buffer);
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active = stream(buffer);
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//if more in stream continue playing.
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if(active)
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alSourceQueueBuffers(Source, 1, &buffer);
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checkError();
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}
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return active;
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}
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void cAudio::release()
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{
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cAudioMutexBasicLock lock(Mutex);
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//Stops the audio Source
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alSourceStop(Source);
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empty();
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//Deletes the source
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alDeleteSources(1, &Source);
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//deletes the last filled buffer
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alDeleteBuffers(CAUDIO_SOURCE_NUM_BUFFERS, Buffers);
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checkError();
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getLogger()->logDebug("Audio Source", "Audio source released.");
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}
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const bool cAudio::isValid() const
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{
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return Valid;
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}
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const bool cAudio::isPlaying() const
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{
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ALenum state = 0;
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alGetSourcei(Source, AL_SOURCE_STATE, &state);
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return (state == AL_PLAYING);
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}
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const bool cAudio::isPaused() const
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{
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ALenum state = 0;
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alGetSourcei(Source, AL_SOURCE_STATE, &state);
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return (state == AL_PAUSED);
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}
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const bool cAudio::isStopped() const
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{
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ALenum state = 0;
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alGetSourcei(Source, AL_SOURCE_STATE, &state);
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return (state == AL_STOPPED);
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}
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const bool cAudio::isLooping() const
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{
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return Loop;
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}
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void cAudio::setPosition(const cVector3& position)
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{
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cAudioMutexBasicLock lock(Mutex);
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alSource3f(Source, AL_POSITION, position.x, position.y, position.z);
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checkError();
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}
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void cAudio::setVelocity(const cVector3& velocity)
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{
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cAudioMutexBasicLock lock(Mutex);
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alSource3f(Source, AL_VELOCITY, velocity.x, velocity.y, velocity.z);
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checkError();
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}
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void cAudio::setDirection(const cVector3& direction)
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{
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cAudioMutexBasicLock lock(Mutex);
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alSource3f(Source, AL_DIRECTION, direction.x, direction.y, direction.z);
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checkError();
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}
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void cAudio::setRolloffFactor(const float& rolloff)
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{
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cAudioMutexBasicLock lock(Mutex);
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alSourcef(Source, AL_ROLLOFF_FACTOR, rolloff);
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checkError();
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}
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void cAudio::setStrength(const float& soundstrength)
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{
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float inverseStrength = 0.0f;
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if(soundstrength > 0.0f)
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inverseStrength = 1.0f / soundstrength;
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cAudioMutexBasicLock lock(Mutex);
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alSourcef(Source, AL_ROLLOFF_FACTOR, inverseStrength);
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checkError();
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}
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void cAudio::setMinDistance(const float& minDistance)
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{
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cAudioMutexBasicLock lock(Mutex);
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alSourcef(Source, AL_REFERENCE_DISTANCE, minDistance);
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checkError();
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}
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void cAudio::setMaxDistance(const float& maxDistance)
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{
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cAudioMutexBasicLock lock(Mutex);
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alSourcef(Source, AL_MAX_DISTANCE, maxDistance);
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checkError();
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}
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void cAudio::setPitch(const float& pitch)
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{
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cAudioMutexBasicLock lock(Mutex);
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alSourcef (Source, AL_PITCH, pitch);
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checkError();
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}
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void cAudio::setVolume(const float& volume)
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{
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cAudioMutexBasicLock lock(Mutex);
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alSourcef(Source, AL_GAIN, volume);
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checkError();
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}
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void cAudio::setMinVolume(const float& minVolume)
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{
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cAudioMutexBasicLock lock(Mutex);
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alSourcef(Source, AL_MIN_GAIN, minVolume);
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checkError();
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}
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void cAudio::setMaxVolume(const float& maxVolume)
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{
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cAudioMutexBasicLock lock(Mutex);
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alSourcef(Source, AL_MAX_GAIN, maxVolume);
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checkError();
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}
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void cAudio::setInnerConeAngle(const float& innerAngle)
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{
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cAudioMutexBasicLock lock(Mutex);
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alSourcef(Source, AL_CONE_INNER_ANGLE, innerAngle);
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checkError();
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}
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void cAudio::setOuterConeAngle(const float& outerAngle)
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{
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cAudioMutexBasicLock lock(Mutex);
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alSourcef(Source, AL_CONE_OUTER_ANGLE, outerAngle);
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checkError();
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}
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void cAudio::setOuterConeVolume(const float& outerVolume)
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{
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cAudioMutexBasicLock lock(Mutex);
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alSourcef(Source, AL_CONE_OUTER_GAIN, outerVolume);
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checkError();
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}
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void cAudio::setDopplerStrength(const float& dstrength)
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{
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cAudioMutexBasicLock lock(Mutex);
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alSourcef(Source, AL_DOPPLER_FACTOR, dstrength);
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checkError();
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}
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void cAudio::setDopplerVelocity(const cVector3& dvelocity)
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{
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cAudioMutexBasicLock lock(Mutex);
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alSource3f(Source, AL_DOPPLER_VELOCITY, dvelocity.x, dvelocity.y, dvelocity.z);
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checkError();
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}
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void cAudio::move(const cVector3& position)
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{
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cAudioMutexBasicLock lock(Mutex);
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cVector3 oldPos = getPosition();
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cVector3 velocity = position - oldPos;
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alSource3f(Source, AL_VELOCITY, velocity.x, velocity.y, velocity.z);
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alSource3f(Source, AL_POSITION, position.x, position.y, position.z);
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checkError();
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}
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const cVector3 cAudio::getPosition() const
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{
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cVector3 position;
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alGetSourcefv(Source, AL_POSITION, &position.x);
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return position;
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}
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const cVector3 cAudio::getVelocity() const
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{
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cVector3 velocity;
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alGetSourcefv(Source, AL_VELOCITY, &velocity.x);
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return velocity;
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}
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const cVector3 cAudio::getDirection() const
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{
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cVector3 direction;
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alGetSourcefv(Source, AL_DIRECTION, &direction.x);
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return direction;
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}
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const float cAudio::getRolloffFactor() const
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{
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float value = 0.0f;
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alGetSourcef(Source, AL_ROLLOFF_FACTOR, &value);
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return value;
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}
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const float cAudio::getStrength() const
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{
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float value = 0.0f;
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alGetSourcef(Source, AL_ROLLOFF_FACTOR, &value);
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float inverseStrength = 0.0f;
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if(value > 0.0f)
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inverseStrength = 1.0f / value;
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return inverseStrength;
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}
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const float cAudio::getMinDistance() const
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{
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float value = 0.0f;
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alGetSourcef(Source, AL_REFERENCE_DISTANCE, &value);
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return value;
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}
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const float cAudio::getMaxDistance() const
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{
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float value = 0.0f;
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alGetSourcef(Source, AL_MAX_DISTANCE, &value);
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return value;
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}
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const float cAudio::getPitch() const
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{
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float value = 0.0f;
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alGetSourcef(Source, AL_PITCH, &value);
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return value;
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}
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const float cAudio::getVolume() const
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{
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float value = 0.0f;
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alGetSourcef(Source, AL_GAIN, &value);
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return value;
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}
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const float cAudio::getMinVolume() const
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{
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float value = 0.0f;
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alGetSourcef(Source, AL_MIN_GAIN, &value);
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return value;
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}
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const float cAudio::getMaxVolume() const
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{
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float value = 0.0f;
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alGetSourcef(Source, AL_MAX_GAIN, &value);
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return value;
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}
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const float cAudio::getInnerConeAngle() const
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{
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float value = 0.0f;
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alGetSourcef(Source, AL_CONE_INNER_ANGLE, &value);
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return value;
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}
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const float cAudio::getOuterConeAngle() const
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{
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float value = 0.0f;
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alGetSourcef(Source, AL_CONE_OUTER_ANGLE, &value);
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return value;
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}
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const float cAudio::getOuterConeVolume() const
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{
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float value = 0.0f;
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alGetSourcef(Source, AL_CONE_OUTER_GAIN, &value);
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return value;
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}
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const float cAudio::getDopplerStrength() const
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{
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float value = 0.0f;
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alGetSourcef(Source, AL_DOPPLER_FACTOR, &value);
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return value;
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}
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const cVector3 cAudio::getDopplerVelocity() const
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{
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cVector3 velocity;
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alGetSourcefv(Source, AL_DOPPLER_VELOCITY, &velocity.x);
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return velocity;
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}
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#ifdef CAUDIO_EFX_ENABLED
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unsigned int cAudio::getNumEffectSlotsAvailable() const
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{
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return EffectSlotsAvailable;
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}
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bool cAudio::attachEffect(unsigned int slot, IEffect* effect)
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{
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cAudioMutexBasicLock lock(Mutex);
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if(slot < EffectSlotsAvailable)
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{
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Effects[slot] = effect;
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if(Effects[slot])
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Effects[slot]->grab();
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updateEffect(slot);
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return true;
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}
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return false;
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}
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void cAudio::removeEffect(unsigned int slot)
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{
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cAudioMutexBasicLock lock(Mutex);
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if(slot < EffectSlotsAvailable)
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{
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if(Effects[slot])
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Effects[slot]->drop();
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Effects[slot] = NULL;
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LastEffectTimeStamp[slot] = 0;
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updateEffect(slot, true);
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}
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}
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bool cAudio::attachFilter(IFilter* filter)
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{
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cAudioMutexBasicLock lock(Mutex);
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Filter = filter;
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if(Filter)
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Filter->grab();
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updateFilter();
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return true;
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}
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void cAudio::removeFilter()
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{
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cAudioMutexBasicLock lock(Mutex);
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if(Filter)
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Filter->drop();
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Filter = NULL;
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LastFilterTimeStamp = 0;
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updateFilter(true);
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}
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#endif
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void cAudio::empty()
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{
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int queued = 0;
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alGetSourcei(Source, AL_BUFFERS_QUEUED, &queued);
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while (queued--)
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{
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ALuint buffer;
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alSourceUnqueueBuffers(Source, 1, &buffer);
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checkError();
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}
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}
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bool cAudio::checkError()
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{
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int error = alGetError();
|
|
const char* errorString;
|
|
|
|
if (error != AL_NO_ERROR)
|
|
{
|
|
errorString = alGetString(error);
|
|
if(error == AL_OUT_OF_MEMORY)
|
|
getLogger()->logCritical("Audio Source", "OpenAL Error: %s.", errorString);
|
|
else
|
|
getLogger()->logError("Audio Source", "OpenAL Error: %s.", errorString);
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool cAudio::stream(ALuint buffer)
|
|
{
|
|
if(Decoder)
|
|
{
|
|
//stores the caculated data into buffer that is passed to output.
|
|
size_t totalread = 0;
|
|
unsigned int errorcount = 0;
|
|
char tempbuffer[CAUDIO_SOURCE_BUFFER_SIZE];
|
|
while( totalread < CAUDIO_SOURCE_BUFFER_SIZE )
|
|
{
|
|
char tempbuffer2[CAUDIO_SOURCE_BUFFER_SIZE];
|
|
int actualread = Decoder->readAudioData(tempbuffer2, CAUDIO_SOURCE_BUFFER_SIZE-totalread);
|
|
if(actualread > 0)
|
|
{
|
|
memcpy(tempbuffer+totalread,tempbuffer2,actualread);
|
|
totalread += actualread;
|
|
}
|
|
if(actualread < 0)
|
|
{
|
|
++errorcount;
|
|
getLogger()->logDebug("Audio Source", "Decoder returned an error: %i (%i of 3)", actualread, errorcount);
|
|
if(errorcount >= 3)
|
|
break;
|
|
}
|
|
if(actualread == 0)
|
|
{
|
|
if(isLooping())
|
|
{
|
|
//If we are to loop, set to the beginning and reload from the start
|
|
Decoder->setPosition(0, false);
|
|
getLogger()->logDebug("Audio Source", "Buffer looping.");
|
|
}
|
|
else
|
|
break;
|
|
}
|
|
}
|
|
|
|
//Second check, in case looping is not enabled, we will return false for end of stream
|
|
if(totalread == 0)
|
|
{
|
|
return false;
|
|
}
|
|
getLogger()->logDebug("Audio Source", "Buffered %i bytes of data into buffer %i at %i hz.", totalread, buffer, Decoder->getFrequency());
|
|
alBufferData(buffer, convertAudioFormatEnum(Decoder->getFormat()), tempbuffer, totalread, Decoder->getFrequency());
|
|
checkError();
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
ALenum cAudio::convertAudioFormatEnum(AudioFormats format)
|
|
{
|
|
switch(format)
|
|
{
|
|
case EAF_8BIT_MONO:
|
|
return AL_FORMAT_MONO8;
|
|
case EAF_16BIT_MONO:
|
|
return AL_FORMAT_MONO16;
|
|
case EAF_8BIT_STEREO:
|
|
return AL_FORMAT_STEREO8;
|
|
case EAF_16BIT_STEREO:
|
|
return AL_FORMAT_STEREO16;
|
|
default:
|
|
return AL_FORMAT_MONO8;
|
|
};
|
|
}
|
|
|
|
#ifdef CAUDIO_EFX_ENABLED
|
|
void cAudio::updateFilter(bool remove)
|
|
{
|
|
if(!remove)
|
|
{
|
|
if(Filter && Filter->isValid())
|
|
{
|
|
if(LastFilterTimeStamp != Filter->getLastUpdated())
|
|
{
|
|
LastFilterTimeStamp = Filter->getLastUpdated();
|
|
cFilter* theFilter = static_cast<cFilter*>(Filter);
|
|
if(theFilter)
|
|
{
|
|
alSourcei(Source, AL_DIRECT_FILTER, theFilter->getOpenALFilter());
|
|
checkError();
|
|
return;
|
|
}
|
|
}
|
|
return;
|
|
}
|
|
}
|
|
alSourcei(Source, AL_DIRECT_FILTER, AL_FILTER_NULL);
|
|
checkError();
|
|
}
|
|
|
|
void cAudio::updateEffect(unsigned int slot, bool remove)
|
|
{
|
|
if(slot < EffectSlotsAvailable)
|
|
{
|
|
if(!remove)
|
|
{
|
|
if(Effects[slot] && Effects[slot]->isValid())
|
|
{
|
|
if(LastEffectTimeStamp[slot] != Effects[slot]->getLastUpdated())
|
|
{
|
|
LastEffectTimeStamp[slot] = Effects[slot]->getLastUpdated();
|
|
cEffect* theEffect = static_cast<cEffect*>(Effects[slot]);
|
|
if(theEffect)
|
|
{
|
|
ALuint filterID = AL_FILTER_NULL;
|
|
cFilter* theFilter = static_cast<cFilter*>(theEffect->getFilter());
|
|
if(theFilter)
|
|
{
|
|
filterID = theFilter->getOpenALFilter();
|
|
}
|
|
alSource3i(Source, AL_AUXILIARY_SEND_FILTER, theEffect->getOpenALEffectSlot(), slot, filterID);
|
|
checkError();
|
|
return;
|
|
}
|
|
}
|
|
return;
|
|
}
|
|
}
|
|
alSource3i(Source, AL_AUXILIARY_SEND_FILTER, AL_EFFECTSLOT_NULL, slot, AL_FILTER_NULL);
|
|
checkError();
|
|
}
|
|
}
|
|
#endif
|
|
}
|