axmol/CocosDenshion/emscripten/SimpleAudioEngine.cpp

// XXX: Have just stubbed stuff out to get this building for now.

/****************************************************************************
Copyright (c) 2010 cocos2d-x.org

http://www.cocos2d-x.org

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
****************************************************************************/

#include <map>
#include <string>
#include <stdio.h>
#include <unistd.h>

#include <AL/al.h>
#include <AL/alc.h>
//#include <AL/alut.h>
#include <sys/stat.h>
//#include <vorbis/vorbisfile.h>

#include "SimpleAudioEngine.h"
#include "cocos2d.h"
USING_NS_CC;

using namespace std;

namespace CocosDenshion
{
	struct soundData {
		ALuint buffer;
		ALuint source;
		bool   isLooped;
	};

	typedef map<string, soundData *> EffectsMap;
	EffectsMap s_effects;

	typedef enum {
		PLAYING,
		STOPPED,
		PAUSED,
	} playStatus;

	static float s_volume 				   = 1.0f;
	static float s_effectVolume			   = 1.0f;

	struct backgroundMusicData {
		ALuint buffer;
		ALuint source;
	};
	typedef map<string, backgroundMusicData *> BackgroundMusicsMap;
	BackgroundMusicsMap s_backgroundMusics;

	static ALuint s_backgroundSource = AL_NONE;

	static SimpleAudioEngine  *s_engine = 0;

	static int checkALError(const char *funcName)
	{
		int err = alGetError();

		if (err != AL_NO_ERROR)
		{
			switch (err)
			{
				case AL_INVALID_NAME:
					fprintf(stderr, "AL_INVALID_NAME in %s\n", funcName);
					break;

				case AL_INVALID_ENUM:
					fprintf(stderr, "AL_INVALID_ENUM in %s\n", funcName);
					break;

				case AL_INVALID_VALUE:
					fprintf(stderr, "AL_INVALID_VALUE in %s\n", funcName);
					break;

				case AL_INVALID_OPERATION:
					fprintf(stderr, "AL_INVALID_OPERATION in %s\n", funcName);
					break;

				case AL_OUT_OF_MEMORY:
					fprintf(stderr, "AL_OUT_OF_MEMORY in %s\n", funcName);
					break;
			}
		}

		return err;
	}

    static void stopBackground(bool bReleaseData)
    {
		s_backgroundSource = AL_NONE;
    }

    static void setBackgroundVolume(float volume)
    {
    }

	SimpleAudioEngine::SimpleAudioEngine()
	{
	}

	SimpleAudioEngine::~SimpleAudioEngine()
	{
	}

	SimpleAudioEngine* SimpleAudioEngine::sharedEngine()
	{
		if (!s_engine)
			s_engine = new SimpleAudioEngine();
        
		return s_engine;
	}

	void SimpleAudioEngine::end()
	{
		checkALError("end");

		// clear all the sounds
	    EffectsMap::const_iterator end = s_effects.end();
	    for (EffectsMap::iterator it = s_effects.begin(); it != end; it++)
	    {
	        alSourceStop(it->second->source);
	        checkALError("end");
			alDeleteBuffers(1, &it->second->buffer);
			checkALError("end");
			alDeleteSources(1, &it->second->source);
			checkALError("end");
			delete it->second;
	    }
	    s_effects.clear();

		// and the background too
		stopBackground(true);

		for (BackgroundMusicsMap::iterator it = s_backgroundMusics.begin(); it != s_backgroundMusics.end(); ++it)
		{
			alSourceStop(it->second->source);
			checkALError("end");
			alDeleteBuffers(1, &it->second->buffer);
			checkALError("end");
			alDeleteSources(1, &it->second->source);
			checkALError("end");
			delete it->second;
		}
		s_backgroundMusics.clear();
	}

	//
	// OGG support
	//
	static bool isOGGFile(const char *pszFilePath)
	{
        return true;
	}

	static ALuint createBufferFromOGG(const char *pszFilePath)
	{
	}


	//
	// background audio
	//
    void SimpleAudioEngine::preloadBackgroundMusic(const char* pszFilePath)
	{
	}

	void SimpleAudioEngine::playBackgroundMusic(const char* pszFilePath, bool bLoop)
	{
	}

	void SimpleAudioEngine::stopBackgroundMusic(bool bReleaseData)
	{
	}

	void SimpleAudioEngine::pauseBackgroundMusic()
	{
	}

	void SimpleAudioEngine::resumeBackgroundMusic()
	{
	} 

	void SimpleAudioEngine::rewindBackgroundMusic()
	{
	}

	bool SimpleAudioEngine::willPlayBackgroundMusic()
	{
		return false;
	}

	bool SimpleAudioEngine::isBackgroundMusicPlaying()
	{
        return false;
	}

	float SimpleAudioEngine::getBackgroundMusicVolume()
	{
		return s_volume;
	}

	void SimpleAudioEngine::setBackgroundMusicVolume(float volume)
	{
	}

	//
	// Effect audio (using OpenAL)
	//
	float SimpleAudioEngine::getEffectsVolume()
	{
		return s_effectVolume;
	}

	void SimpleAudioEngine::setEffectsVolume(float volume)
	{
	}

	unsigned int SimpleAudioEngine::playEffect(const char* pszFilePath, bool bLoop)
	{
		// Changing file path to full path
    	std::string fullPath = CCFileUtils::sharedFileUtils()->fullPathForFilename(pszFilePath);

		EffectsMap::iterator iter = s_effects.find(fullPath);

		if (iter == s_effects.end())
		{
			preloadEffect(fullPath.c_str());

			// let's try again
			iter = s_effects.find(fullPath);
			if (iter == s_effects.end())
			{
				fprintf(stderr, "could not find play sound %s\n", fullPath.c_str());
				return -1;
			}
		}

		checkALError("playEffect");
		iter->second->isLooped = bLoop;
		alSourcei(iter->second->source, AL_LOOPING, iter->second->isLooped ? AL_TRUE : AL_FALSE);
		alSourcePlay(iter->second->source);
		checkALError("playEffect");

		return iter->second->source;
	}

	void SimpleAudioEngine::stopEffect(unsigned int nSoundId)
	{
		alSourceStop(nSoundId);
		checkALError("stopEffect");
	}

	void SimpleAudioEngine::preloadEffect(const char* pszFilePath)
	{
	}

	void SimpleAudioEngine::unloadEffect(const char* pszFilePath)
	{
		// Changing file path to full path
    	std::string fullPath = CCFileUtils::sharedFileUtils()->fullPathForFilename(pszFilePath);
    	
		EffectsMap::iterator iter = s_effects.find(fullPath);

		if (iter != s_effects.end())
	    {
			checkALError("unloadEffect");

	        alSourceStop(iter->second->source);
	        checkALError("unloadEffect");

			alDeleteSources(1, &iter->second->source);
			checkALError("unloadEffect");

			alDeleteBuffers(1, &iter->second->buffer);
			checkALError("unloadEffect");
			delete iter->second;

			s_effects.erase(iter);
	    }
	}

	void SimpleAudioEngine::pauseEffect(unsigned int nSoundId)
	{
		ALint state;
		alGetSourcei(nSoundId, AL_SOURCE_STATE, &state);
		if (state == AL_PLAYING)
			alSourcePause(nSoundId);
		checkALError("pauseEffect");
	}

	void SimpleAudioEngine::pauseAllEffects()
	{
		EffectsMap::iterator iter = s_effects.begin();
		ALint state;
		while (iter != s_effects.end())
	    {
			alGetSourcei(iter->second->source, AL_SOURCE_STATE, &state);
			if (state == AL_PLAYING)
				alSourcePause(iter->second->source);
			checkALError("pauseAllEffects");
			++iter;
	    }
	}

	void SimpleAudioEngine::resumeEffect(unsigned int nSoundId)
	{
		ALint state;
		alGetSourcei(nSoundId, AL_SOURCE_STATE, &state);
		if (state == AL_PAUSED)
			alSourcePlay(nSoundId);
		checkALError("resumeEffect");
	}

	void SimpleAudioEngine::resumeAllEffects()
	{
		EffectsMap::iterator iter = s_effects.begin();
		ALint state;
		while (iter != s_effects.end())
	    {
			alGetSourcei(iter->second->source, AL_SOURCE_STATE, &state);
			if (state == AL_PAUSED)
				alSourcePlay(iter->second->source);
			checkALError("resumeAllEffects");
			++iter;
	    }
	}

    void SimpleAudioEngine::stopAllEffects()
    {
		EffectsMap::iterator iter = s_effects.begin();

		if (iter != s_effects.end())
	    {
			checkALError("stopAllEffects");
	        alSourceStop(iter->second->source);
			checkALError("stopAllEffects");
	    }
    }

}