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source: orxonox.OLD/trunk/src/lib/sound/sound_engine.h @ 6944

Last change on this file since 6944 was 6849, checked in by bensch, 19 years ago

trunk: alc-stuff

File size: 3.1 KB
Line 
1/*!
2 * @file sound_engine.h
3 * Definition of the SoundEngine singleton Class
4 */
5
6#ifndef _SOUND_ENGINE_H
7#define _SOUND_ENGINE_H
8
9#include "base_object.h"
10#include "alincl.h"
11
12#include "sound_buffer.h"
13#include "sound_source.h"
14
15#include <list>
16#include <stack>
17
18#define SOUND_DOPPLER_FACTOR       0.001          //!< A factor for the audible doppler effect
19#define SOUND_DOPPLER_VELOCITY     500            //!< A factor for the TravelSpeed of sound
20
21// FORWARD DECLARATION
22class PNode;
23class IniParser;
24
25
26//! A class that handles audio via the openAudioLibrary
27class SoundEngine : public BaseObject {
28  public:
29    virtual ~SoundEngine();
30    /** @returns a Pointer to the only object of this Class */
31    inline static SoundEngine* getInstance() { if (!SoundEngine::singletonRef) SoundEngine::singletonRef = new SoundEngine();  return SoundEngine::singletonRef; };
32
33    void loadSettings(IniParser* iniParser);
34
35    SoundSource* createSource(const char* fileName, PNode* sourceNode = NULL);
36
37    /** @param listener the listener in the scene */
38    void setListener(PNode* listener) { this->listener = listener; };
39    void setDopplerValues(ALfloat dopplerFactor, ALfloat dopplerVelocity);
40
41
42    /** @returns the Music Volume in % */
43    inline float getMusicVolume() { return this->musicVolume; };
44    /** @returns the Effects Volume in % */
45    inline float getEffectsVolume() { return this->effectsVolume; };
46
47    void update();
48
49  // administrative
50    void popALSource(ALuint& source);
51    void pushALSource(ALuint& source) { if (source != 0) this->ALSources.push(source); };
52
53    void flushUnusedBuffers();
54    void flushAllBuffers();
55    void flushAllSources();
56
57    bool initAudio();
58    bool allocateSources(unsigned int count);
59
60  // error handling:
61    static bool checkError(const char* error, unsigned int line);
62    bool checkALCError(const char* error, unsigned int line);
63    static const char* getALErrorString(ALenum err);
64    static const char* getALCErrorString(ALenum err);
65
66  private:
67    SoundEngine();
68
69    void listDevices();
70
71  private:
72    static SoundEngine*            singletonRef;             //!< Reference to this class
73
74    ALCdevice*                     device;                   //!< the used audio-device.
75    ALCcontext*                    context;                  //!< the context, currently in use.
76
77    float                          musicVolume;              //!< the maximum volume of the music in % (0f,1f]
78    float                          effectsVolume;            //!< the maximum volume of sound-effects in % (0f,1f]
79    PNode*                         listener;                 //!< The listener of the Scene
80
81    const std::list<BaseObject*>*  bufferList;               //!< A list of buffers
82    const std::list<BaseObject*>*  sourceList;               //!< A list for all the sources in the scene.
83
84    unsigned int                   maxSourceCount;           //!< How many Sources is the Maximum
85    std::stack<ALuint>             ALSources;                //!< A list of real openAL-Sources, the engine allocates, and stores for reuse.
86};
87
88#endif /* _SOUND_ENGINE_H */
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