Initial Mercurial commit.

2026-08-16 16:20:42 +02:00 · 2009-07-26 15:46:49 +02:00
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+/**
+* Copyright (c) 2006-2009 LOVE Development Team
+* 
+* This software is provided 'as-is', without any express or implied
+* warranty.  In no event will the authors be held liable for any damages
+* arising from the use of this software.
+* 
+* Permission is granted to anyone to use this software for any purpose,
+* including commercial applications, and to alter it and redistribute it
+* freely, subject to the following restrictions:
+* 
+* 1. The origin of this software must not be misrepresented; you must not
+*    claim that you wrote the original software. If you use this software
+*    in a product, an acknowledgment in the product documentation would be
+*    appreciated but is not required.
+* 2. Altered source versions must be plainly marked as such, and must not be
+*    misrepresented as being the original software.
+* 3. This notice may not be removed or altered from any source distribution.
+**/
+
+#ifndef LOVE_AUDIO_OPENAL_POOL_H
+#define LOVE_AUDIO_OPENAL_POOL_H
+
+// STD
+#include <queue>
+#include <map>
+#include <iostream>
+#include <cmath>
+
+// SDL
+#include <SDL.h>
+
+// OpenAL
+#include <AL/alc.h>
+#include <AL/al.h>
+
+// LOVE
+#include <audio/Source.h>
+#include <common/Exception.h>
+
+namespace love
+{
+namespace audio
+{
+namespace openal
+{
+	class Pool
+	{
+	private:
+
+		// Number of OpenAL sources.
+		static const int NUM_SOURCES = 16;
+
+		// OpenAL sources
+		ALuint sources[NUM_SOURCES];
+
+		// A queue of available sources.
+		std::queue<ALuint> available;
+
+		// A map of playing sources.
+		std::map<love::audio::Source *, ALuint> playing;
+
+		// Only one thread can access this object at the same time. This mutex will
+		// make sure of that.
+		SDL_mutex * mutex;
+
+	public:
+
+		Pool();
+		~Pool();
+
+		/**
+		* Gets the OpenAL format identifier based on number of
+		* channels and bits.
+		* @param channels Either 1 (mono) or 2 (stereo). 
+		* @param bits Either 8-bit samples, or 16-bit samples.
+		* @return One of AL_FORMAT_*, or 0 if unsupported format.
+		**/
+		ALenum getFormat(int channels, int bits) const;
+
+		/**
+		* Checks whether an OpenAL source is available.
+		* @return True if at least one is available, false otherwise.
+		**/
+		bool isAvailable() const;
+
+		/**
+		* Checks whether a Source is currently in the playing list.
+		**/
+		bool isPlaying(love::audio::Source * s);
+
+		/**
+		* Returns an available OpenAL source identifier, or 0 if
+		* none is available.
+		* @return An OpenAL source ID, or 0 if unavailable.
+		**/
+		ALuint claim(love::audio::Source * source);
+
+		/**
+		* Makes the specified OpenAL source available for use.
+		* @param source The OpenAL source.
+		**/
+		void release(love::audio::Source * source);
+
+		ALuint find(const love::audio::Source * source) const;
+
+		void update();
+
+		int getNumSources() const;
+		int getMaxSources() const;
+
+		void stop();
+		void pause();
+		void resume();
+		void rewind();
+
+	private:
+
+		ALuint findi(const love::audio::Source * source) const;
+	}; // Pool
+
+} // openal
+} // audio
+} // love
+
+#endif // LOVE_AUDIO_OPENAL_POOL_H