axmol/CocosDenshion/qnx/SimpleAudioEngine.cpp

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

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****************************************************************************/

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

#include <AL/al.h>
#include <AL/alc.h>
#include <AL/alut.h>
#include <mm/renderer.h>
#include <sys/stat.h>

//#include "CCFileUtils.h"

#include "SimpleAudioEngine.h"

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 int	 s_audioOid;

	static float s_volume 				  = 1.0f;
	static float s_effectVolume			  = 1.0f;
	static bool s_isBackgroundInitialized = false;
	static bool s_hasMMRError			  = false;
	static playStatus s_playStatus	  	  = STOPPED;

	static string 		   s_currentBackgroundStr;
	static mmr_connection_t   *s_mmrConnection 	  = 0;
	static mmr_context_t 	  *s_mmrContext 	  = 0;
	static strm_dict_t 		  *s_repeatDictionary = 0;
	static strm_dict_t 		  *s_volumeDictionary = 0;

	static SimpleAudioEngine  *s_engine = 0;

	static void printALError(int err)
	{
		switch (err)
		{
			case AL_NO_ERROR:
				fprintf(stderr, "AL_NO_ERROR");
				break;

			case AL_INVALID_NAME:
				fprintf(stderr, "AL_INVALID_NAME");
				break;

			case AL_INVALID_ENUM:
				fprintf(stderr, "AL_INVALID_ENUM");
				break;

			case AL_INVALID_VALUE:
				fprintf(stderr, "AL_INVALID_VALUE");
				break;

			case AL_INVALID_OPERATION:
				fprintf(stderr, "AL_INVALID_OPERATION");
				break;

			case AL_OUT_OF_MEMORY:
				fprintf(stderr, "AL_OUT_OF_MEMORY");
				break;
		};
	}

    static void mmrerror(mmr_context_t *ctxt, const char *msg)
    {
    	const mmr_error_info_t  *err = mmr_error_info( ctxt );
    	unsigned 				 errcode = (err) ? err->error_code : -1;
    	const char 				*name;

    	fprintf(stderr, "%s: error %d \n", msg, errcode);
    	s_hasMMRError = true;
    }

    static void stopBackground(bool bReleaseData)
    {
    	s_playStatus = STOPPED;

		if (s_mmrContext)
			mmr_stop(s_mmrContext);

		if (bReleaseData)
		{
			if (s_mmrContext)
			{
				mmr_input_detach(s_mmrContext);
				mmr_context_destroy(s_mmrContext);
			}

			if (s_mmrConnection)
				mmr_disconnect(s_mmrConnection);

			if (s_repeatDictionary)
				strm_dict_destroy(s_repeatDictionary);

			if (s_volumeDictionary)
				strm_dict_destroy(s_volumeDictionary);

			s_mmrContext = 0;
			s_mmrConnection = 0;
			s_repeatDictionary = 0;
			s_volumeDictionary = 0;
			s_hasMMRError = false;
			s_currentBackgroundStr = "";
			s_isBackgroundInitialized = false;
		}
    }

    static void setBackgroundVolume(float volume)
    {
		char volume_str[128];

		// set it up the background volume
		strm_dict_t *dictionary = strm_dict_new();

		sprintf(volume_str, "%d", (int)(volume * 100) );
		s_volumeDictionary = strm_dict_set(dictionary, "volume", volume_str);

		if (mmr_output_parameters(s_mmrContext, s_audioOid, s_volumeDictionary) != 0)
		{
			mmrerror(s_mmrContext, "output parameters");
			return;
		}
    }

	SimpleAudioEngine::SimpleAudioEngine()
	{
		alutInit(0, 0);
	}

	SimpleAudioEngine::~SimpleAudioEngine()
	{
		alutExit();
	}

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

	void SimpleAudioEngine::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);

			alDeleteBuffers(1, &it->second->buffer);
			alDeleteSources(1, &it->second->source);
			delete it->second;
	    }
	    s_effects.clear();

		if (s_isBackgroundInitialized)
		{
			s_isBackgroundInitialized = false;
		}

		// and the background too
		stopBackground(true);
	}

	void SimpleAudioEngine::setResource(const char* pszZipFileName)
	{
	}

	//
	// background audio (using mmrenderer)
	//
    void SimpleAudioEngine::preloadBackgroundMusic(const char* pszFilePath)
	{
    	if (!s_isBackgroundInitialized)
    	{
    		const char 		*mmrname = NULL;
    		const char 		*ctxtname = "mmrplayer";
    		char 			 cwd[PATH_MAX];
    		mode_t 			 mode = S_IRUSR | S_IXUSR;

//cjh    		getcwd(cwd, PATH_MAX);
    		string path = "file://";
//    		path += cwd;
//    		path += "/";
//    		path += cocos2d::CCFileUtils::getResourcePath();
//    		path += pszFilePath;

    		s_mmrConnection = mmr_connect(mmrname);
    		if (!s_mmrConnection)
    		{
    			perror("mmr_connect");
    			s_hasMMRError = true;
    			return;
    		}

    		s_mmrContext = mmr_context_create(s_mmrConnection, ctxtname, 0, mode);
    		if (!s_mmrContext)
    		{
    			perror(ctxtname);
    			s_hasMMRError = true;
    			return;
    		}

    		if ((s_audioOid = mmr_output_attach(s_mmrContext, "audio:default", "audio")) < 0)
    		{
    			mmrerror(s_mmrContext, "audio:default");
    			return;
    		}

    		setBackgroundVolume(s_volume);

    		if (mmr_input_attach(s_mmrContext, path.data(), "autolist") < 0)
    		{
    			fprintf(stderr, "unable to load %s\n", path.data());
    			mmrerror(s_mmrContext, path.data());
    			return;
    		}

    		s_currentBackgroundStr 	  = pszFilePath;
			s_isBackgroundInitialized = true;
    	}
	}

	void SimpleAudioEngine::playBackgroundMusic(const char* pszFilePath, bool bLoop)
	{
		if (0 == strcmp(s_currentBackgroundStr.c_str(), pszFilePath))
		{
			stopBackgroundMusic(true);
		}
		else
		{
			if (s_playStatus == PAUSED)
				resumeBackgroundMusic();
			else
				rewindBackgroundMusic();
		}

		if (!s_isBackgroundInitialized)
			preloadBackgroundMusic(pszFilePath);

		if (bLoop)
		{
			// set it up to loop
			strm_dict_t *dictionary = strm_dict_new();
			s_repeatDictionary = strm_dict_set(dictionary, "repeat", "all");

    		if (mmr_input_parameters(s_mmrContext, s_repeatDictionary) != 0)
    		{
    			mmrerror(s_mmrContext, "input parameters (loop)");
    			return;
    		}
		}

		if (s_hasMMRError || !s_mmrContext)
			return;

		if (mmr_play(s_mmrContext) < 0)
		{
			mmrerror(s_mmrContext, "mmr_play");
			s_hasMMRError = true;
		}

		if (!s_hasMMRError)
			s_playStatus = PLAYING;
	}

	void SimpleAudioEngine::stopBackgroundMusic(bool bReleaseData)
	{
    	// if we were paused then we need to resume first so that we can play
		if (s_playStatus == PAUSED)
			resumeBackgroundMusic();

		stopBackground(bReleaseData);
	}

	void SimpleAudioEngine::pauseBackgroundMusic()
	{
		if (s_mmrContext && mmr_speed_set(s_mmrContext, 0) < 0)
		{
			mmrerror(s_mmrContext, "pause");
		}
		s_playStatus = PAUSED;
	}

	void SimpleAudioEngine::resumeBackgroundMusic()
	{
		if (s_mmrContext && mmr_speed_set(s_mmrContext, 1000) < 0)
		{
			mmrerror(s_mmrContext, "resume");
		}
		s_playStatus = PLAYING;
	} 

	void SimpleAudioEngine::rewindBackgroundMusic()
	{
		if (s_mmrContext && mmr_seek(s_mmrContext, "1:0") < 0)
		{
			mmrerror(s_mmrContext, "rewind");
		}
	}

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

	bool SimpleAudioEngine::isBackgroundMusicPlaying()
	{
		return (s_playStatus == PLAYING) && s_isBackgroundInitialized;
	}

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

	void SimpleAudioEngine::setBackgroundMusicVolume(float volume)
	{
		if (s_volume != volume && volume >= -0.0001 && volume <= 1.0001)
		{
    		s_volume = volume;

			setBackgroundVolume(volume);
		}
	}

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

	void SimpleAudioEngine::setEffectsVolume(float volume)
	{
		if (volume != s_effectVolume)
		{
			EffectsMap::const_iterator end = s_effects.end();
			for (EffectsMap::const_iterator it = s_effects.begin(); it != end; it++)
			{
				alSourcef(it->second->source, AL_GAIN, volume);
			}

			s_effectVolume = volume;
		}
	}

	unsigned int SimpleAudioEngine::playEffect(const char* pszFilePath, bool bLoop)
	{
		EffectsMap::iterator iter = s_effects.find(pszFilePath);

		if (iter == s_effects.end())
		{
			preloadEffect(pszFilePath);

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

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

		return iter->second->source;
	}

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

	void SimpleAudioEngine::preloadEffect(const char* pszFilePath)
	{
		EffectsMap::iterator iter = s_effects.find(pszFilePath);

		// check if we have this already
		if (iter == s_effects.end())
		{
			ALuint 		buffer;
			ALuint 		source;
			soundData  *data = new soundData;

			string path = "";//cjh cocos2d::CCFileUtils::getResourcePath();
			path += pszFilePath;

			buffer = alutCreateBufferFromFile(path.data());

			if (buffer == AL_NONE)
			{
				fprintf(stderr, "Error loading file: '%s'\n", path.data());
				alDeleteBuffers(1, &buffer);
				return;
			}

			alGenSources(1, &source);
			alSourcei(source, AL_BUFFER, buffer);

			data->isLooped = false;
			data->buffer = buffer;
			data->source = source;

			s_effects.insert(EffectsMap::value_type(pszFilePath, data));
		}
	}

	void SimpleAudioEngine::unloadEffect(const char* pszFilePath)
	{
		EffectsMap::iterator iter = s_effects.find(pszFilePath);

		if (iter != s_effects.end())
	    {
	        alSourceStop(iter->second->source);
			alDeleteSources(1, &iter->second->source);
			alDeleteBuffers(1, &iter->second->buffer);
			delete iter->second;

			int err = alGetError();
			if (err != AL_NO_ERROR)
				printALError(err);

			s_effects.erase(iter);
	    }
	}
}