Audio subsystem. More...

#include <Urho3D/Audio/Audio.h>

Inheritance diagram for Urho3D::Audio:
Collaboration diagram for Urho3D::Audio:

Public Member Functions

 Audio (Context *context)
virtual ~Audio ()
 Destruct. Terminate the audio thread and free the audio buffer.
bool SetMode (int bufferLengthMSec, int mixRate, bool stereo, bool interpolation=true)
 Initialize sound output with specified buffer length and output mode.
void Update (float timeStep)
 Run update on sound sources. Not required for continued playback, but frees unused sound sources & sounds and updates 3D positions.
bool Play ()
 Restart sound output.
void Stop ()
 Suspend sound output.
void SetMasterGain (const String &type, float gain)
 Set master gain on a specific sound type such as sound effects, music or voice.
void PauseSoundType (const String &type)
 Pause playback of specific sound type. This allows to suspend e.g. sound effects or voice when the game is paused. By default all sound types are unpaused.
void ResumeSoundType (const String &type)
 Resume playback of specific sound type.
void ResumeAll ()
 Resume playback of all sound types.
void SetListener (SoundListener *listener)
 Set active sound listener for 3D sounds.
void StopSound (Sound *sound)
 Stop any sound source playing a certain sound clip.
unsigned GetSampleSize () const
 Return byte size of one sample.
int GetMixRate () const
 Return mixing rate.
bool GetInterpolation () const
 Return whether output is interpolated.
bool IsStereo () const
 Return whether output is stereo.
bool IsPlaying () const
 Return whether audio is being output.
bool IsInitialized () const
 Return whether an audio stream has been reserved.
float GetMasterGain (const String &type) const
 Return master gain for a specific sound source type. Unknown sound types will return full gain (1).
bool IsSoundTypePaused (const String &type) const
 Return whether specific sound type has been paused.
SoundListenerGetListener () const
 Return active sound listener.
const PODVector< SoundSource * > & GetSoundSources () const
 Return all sound sources.
bool HasMasterGain (const String &type) const
 Return whether the specified master gain has been defined.
void AddSoundSource (SoundSource *soundSource)
 Add a sound source to keep track of. Called by SoundSource.
void RemoveSoundSource (SoundSource *soundSource)
 Remove a sound source. Called by SoundSource.
MutexGetMutex ()
 Return audio thread mutex.
float GetSoundSourceMasterGain (StringHash typeHash) const
 Return sound type specific gain multiplied by master gain.
void MixOutput (void *dest, unsigned samples)
 Mix sound sources into the buffer.
- Public Member Functions inherited from Urho3D::Object
 Object (Context *context)
virtual ~Object ()
 Destruct. Clean up self from event sender & receiver structures.
virtual StringHash GetType () const =0
 Return type hash.
virtual const StringGetTypeName () const =0
 Return type name.
virtual const TypeInfoGetTypeInfo () const =0
 Return type info.
virtual void OnEvent (Object *sender, StringHash eventType, VariantMap &eventData)
 Handle event.
bool IsInstanceOf (StringHash type) const
 Check current instance is type of specified type.
bool IsInstanceOf (const TypeInfo *typeInfo) const
 Check current instance is type of specified type.
template<typename T >
bool IsInstanceOf () const
 Check current instance is type of specified class.
void SubscribeToEvent (StringHash eventType, EventHandler *handler)
 Subscribe to an event that can be sent by any sender.
void SubscribeToEvent (Object *sender, StringHash eventType, EventHandler *handler)
 Subscribe to a specific sender's event.
void UnsubscribeFromEvent (StringHash eventType)
 Unsubscribe from an event.
void UnsubscribeFromEvent (Object *sender, StringHash eventType)
 Unsubscribe from a specific sender's event.
void UnsubscribeFromEvents (Object *sender)
 Unsubscribe from a specific sender's events.
void UnsubscribeFromAllEvents ()
 Unsubscribe from all events.
void UnsubscribeFromAllEventsExcept (const PODVector< StringHash > &exceptions, bool onlyUserData)
 Unsubscribe from all events except those listed, and optionally only those with userdata (script registered events.)
void SendEvent (StringHash eventType)
 Send event to all subscribers.
void SendEvent (StringHash eventType, VariantMap &eventData)
 Send event with parameters to all subscribers.
VariantMapGetEventDataMap () const
 Return a preallocated map for event data. Used for optimization to avoid constant re-allocation of event data maps.
ContextGetContext () const
 Return execution context.
const VariantGetGlobalVar (StringHash key) const
 Return global variable based on key.
const VariantMapGetGlobalVars () const
 Return all global variables.
void SetGlobalVar (StringHash key, const Variant &value)
 Set global variable with the respective key and value.
ObjectGetSubsystem (StringHash type) const
 Return subsystem by type.
ObjectGetEventSender () const
 Return active event sender. Null outside event handling.
EventHandlerGetEventHandler () const
 Return active event handler. Null outside event handling.
bool HasSubscribedToEvent (StringHash eventType) const
 Return whether has subscribed to an event without specific sender.
bool HasSubscribedToEvent (Object *sender, StringHash eventType) const
 Return whether has subscribed to a specific sender's event.
bool HasEventHandlers () const
 Return whether has subscribed to any event.
template<class T >
T * GetSubsystem () const
 Template version of returning a subsystem.
const StringGetCategory () const
 Return object category. Categories are (optionally) registered along with the object factory. Return an empty string if the object category is not registered.
- Public Member Functions inherited from Urho3D::RefCounted
 RefCounted ()
 Construct. Allocate the reference count structure and set an initial self weak reference.
virtual ~RefCounted ()
 Destruct. Mark as expired and also delete the reference count structure if no outside weak references exist.
void AddRef ()
 Increment reference count. Can also be called outside of a SharedPtr for traditional reference counting.
void ReleaseRef ()
 Decrement reference count and delete self if no more references. Can also be called outside of a SharedPtr for traditional reference counting.
int Refs () const
 Return reference count.
int WeakRefs () const
 Return weak reference count.
RefCountRefCountPtr ()
 Return pointer to the reference count structure.

Static Public Attributes

static const int SAMPLE_SIZE_MUL = 1
 Final multiplier for audio byte conversion.

Private Member Functions

 URHO3D_OBJECT (Audio, Object)
void HandleRenderUpdate (StringHash eventType, VariantMap &eventData)
 Handle render update event.
void Release ()
 Stop sound output and release the sound buffer.
void UpdateInternal (float timeStep)
 Actually update sound sources with the specific timestep. Called internally.

Private Attributes

SharedArrayPtr< int > clipBuffer_
 Clipping buffer for mixing.
Mutex audioMutex_
 Audio thread mutex.
unsigned deviceID_
 SDL audio device ID.
unsigned sampleSize_
 Sample size.
unsigned fragmentSize_
 Clip buffer size in samples.
int mixRate_
 Mixing rate.
bool interpolation_
 Mixing interpolation flag.
bool stereo_
 Stereo flag.
bool playing_
 Playing flag.
HashMap< StringHash, VariantmasterGain_
 Master gain by sound source type.
HashSet< StringHashpausedSoundTypes_
 Paused sound types.
PODVector< SoundSource * > soundSources_
 Sound sources.
WeakPtr< SoundListenerlistener_
 Sound listener.

Additional Inherited Members

- Static Public Member Functions inherited from Urho3D::Object
static const TypeInfoGetTypeInfoStatic ()
 Return type info static.
- Protected Attributes inherited from Urho3D::Object
 Execution context.

Detailed Description

Audio subsystem.

The documentation for this class was generated from the following files:
  • Source/Urho3D/Audio/Audio.h
  • Source/Urho3D/Audio/Audio.cpp