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https://github.com/love2d/love.git
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rude
127 lines
2.9 KiB
C++
127 lines
2.9 KiB
C++
/**
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* Copyright (c) 2006-2009 LOVE Development Team
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*
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* This software is provided 'as-is', without any express or implied
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* warranty. In no event will the authors be held liable for any damages
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* arising from the use of this software.
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*
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* Permission is granted to anyone to use this software for any purpose,
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* including commercial applications, and to alter it and redistribute it
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* freely, subject to the following restrictions:
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*
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* 1. The origin of this software must not be misrepresented; you must not
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* claim that you wrote the original software. If you use this software
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* in a product, an acknowledgment in the product documentation would be
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* appreciated but is not required.
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* 2. Altered source versions must be plainly marked as such, and must not be
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* misrepresented as being the original software.
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* 3. This notice may not be removed or altered from any source distribution.
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**/
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#ifndef LOVE_AUDIO_OPENAL_POOL_H
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#define LOVE_AUDIO_OPENAL_POOL_H
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// STD
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#include <queue>
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#include <map>
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#include <iostream>
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#include <cmath>
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// SDL
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#include <SDL.h>
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// OpenAL
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#include <AL/alc.h>
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#include <AL/al.h>
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// LOVE
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#include <audio/Source.h>
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#include <common/Exception.h>
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namespace love
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{
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namespace audio
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{
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namespace openal
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{
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class Pool
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{
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private:
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// Number of OpenAL sources.
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static const int NUM_SOURCES = 16;
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// OpenAL sources
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ALuint sources[NUM_SOURCES];
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// A queue of available sources.
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std::queue<ALuint> available;
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// A map of playing sources.
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std::map<love::audio::Source *, ALuint> playing;
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// Only one thread can access this object at the same time. This mutex will
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// make sure of that.
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SDL_mutex * mutex;
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public:
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Pool();
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~Pool();
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/**
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* Gets the OpenAL format identifier based on number of
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* channels and bits.
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* @param channels Either 1 (mono) or 2 (stereo).
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* @param bits Either 8-bit samples, or 16-bit samples.
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* @return One of AL_FORMAT_*, or 0 if unsupported format.
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**/
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ALenum getFormat(int channels, int bits) const;
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/**
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* Checks whether an OpenAL source is available.
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* @return True if at least one is available, false otherwise.
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**/
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bool isAvailable() const;
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/**
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* Checks whether a Source is currently in the playing list.
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**/
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bool isPlaying(love::audio::Source * s);
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/**
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* Returns an available OpenAL source identifier, or 0 if
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* none is available.
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* @return An OpenAL source ID, or 0 if unavailable.
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**/
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ALuint claim(love::audio::Source * source);
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/**
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* Makes the specified OpenAL source available for use.
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* @param source The OpenAL source.
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**/
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void release(love::audio::Source * source);
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ALuint find(const love::audio::Source * source) const;
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void update();
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int getNumSources() const;
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int getMaxSources() const;
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void stop();
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void pause();
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void resume();
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void rewind();
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private:
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ALuint findi(const love::audio::Source * source) const;
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}; // Pool
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} // openal
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} // audio
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} // love
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#endif // LOVE_AUDIO_OPENAL_POOL_H
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