AudioEngine.cpp

#include "AudioEngine.h"
#include "Errors.h"

namespace NeroEngine{
	void SoundEffect::play(int loops){
		if (Mix_PlayChannel(-1, m_chunk, loops) == -1){
			if (Mix_PlayChannel(0,m_chunk,loops)==-1){
				fatalError("Mix_PlayChannel failed:" + std::string(Mix_GetError()));
			}
		}
	}
	void Music::play(int loops){
		if (Mix_PlayMusic(m_music, loops) == -1){
			fatalError("Mix_PlayMusic failed:" + std::string(Mix_GetError()));
		}
	}
	void Music::pause(){
		Mix_PauseMusic();

	}

	void Music::stop(){
		Mix_HaltMusic();
	}

	void Music::resume(){
		Mix_ResumeMusic();
	}

	AudioEngine::AudioEngine()
	{

	}


	AudioEngine::~AudioEngine()
	{
		destroy();
	}


	void AudioEngine::init(){
		if (m_isInitialized){
			fatalError("AudioEngine has been initalized!");
		}
		if (Mix_Init(MIX_INIT_OGG | MIX_INIT_MP3)==-1) {
			fatalError("Mix_Init  failed:"+std::string(Mix_GetError()));
		}
		if (Mix_OpenAudio(MIX_DEFAULT_FREQUENCY, MIX_DEFAULT_FORMAT, 2, 1024)==-1){
			fatalError("Mix_OpenAudio  failed:" + std::string(Mix_GetError()));
		}
		m_isInitialized = true;
	}


	void AudioEngine::destroy(){
		if (m_isInitialized){
			m_isInitialized = false;

			for (auto& it:m_effectMap){
				Mix_FreeChunk(it.second);
			}

			for (auto& it : m_musicMap){
				Mix_FreeMusic(it.second);
			}

			m_effectMap.clear();
			m_musicMap.clear();

			Mix_CloseAudio();
			Mix_Quit();
		}
	}



	SoundEffect AudioEngine::loadSoundEffect(const std::string& filePath){
		SoundEffect effect;

		auto it = m_effectMap.find(filePath);
		if (it == m_effectMap.end()){
			Mix_Chunk* chunk = Mix_LoadWAV(filePath.c_str());
			if (chunk==nullptr){
				fatalError("Mix_LoadWAV falied" + std::string(Mix_GetError()));
			}
			effect.m_chunk = chunk;
			m_effectMap[filePath] = chunk;

		}
		else{
			effect.m_chunk = it->second;
		}
		return effect;
	}


	Music AudioEngine::loadMusic(const std::string& filePath){
		Music music;

		auto it = m_musicMap.find(filePath);
		if (it == m_musicMap.end()){
			Mix_Music* mixMusic = Mix_LoadMUS(filePath.c_str());
			if (mixMusic == nullptr){
				fatalError("Mix_LoadMUS falied" + std::string(Mix_GetError()));
			}
			music.m_music = mixMusic;
			m_musicMap[filePath] = mixMusic;
		}
		else{
			music.m_music = it->second;
		}
		return music;
	}
}