本篇博客介绍Cocos2d-x 3.2中Lua示例的音频测试，Cocos2d-x使用SimpleAudioEngine这个类来实现音频的控制，比如播放、暂停、停止等操作。
Lua代码中，使用的是AudioEngine，具体实现可以参考AudioEngine.lua文件，只是把SimpleAudioEngin进行了封装。
示例代码：
- --[[
- CocosDenshionTest.lua
- Cocos2d-x 音频支持
- ]]--
- require "AudioEngine"
- local EFFECT_FILE = "effect1.wav"
- local MUSIC_FILE = nil
- -- 获取目标平台
- local targetPlatform = cc.Application:getInstance():getTargetPlatform()
- -- iphone或者ipad
- if (cc.PLATFORM_OS_IPHONE == targetPlatform) or (cc.PLATFORM_OS_IPAD == targetPlatform) then
- MUSIC_FILE = "background.caf" -- caf格式
- else
- MUSIC_FILE = "background.mp3" -- mp3格式
- end
- local LINE_SPACE = 40
- local function CocosDenshionTest()
- local ret = cc.Layer:create()
- local m_pItmeMenu = nil
- local m_tBeginPos = cc.p(0, 0)
- local m_nSoundId = 0
- -- 测试菜单项
- local testItems = {
- "play background music",
- "stop background music",
- "pause background music",
- "resume background music",
- "rewind background music",
- "is background music playing",
- "play effect",
- "play effect repeatly",
- "stop effect",
- "unload effect",
- "add background music volume",
- "sub background music volume",
- "add effects volume",
- "sub effects volume",
- "pause effect",
- "resume effect",
- "pause all effects",
- "resume all effects",
- "stop all effects"
- }
- -- 菜单回调方法
- local function menuCallback(tag, pMenuItem)
- local nIdx = pMenuItem:getLocalZOrder() - 10000
- -- play background music
- if nIdx == 0 then
- AudioEngine.playMusic(MUSIC_FILE, true) -- 播放音乐
- elseif nIdx == 1 then
- -- stop background music
- AudioEngine.stopMusic() -- 停止背景音乐
- elseif nIdx == 2 then
- -- pause background music
- AudioEngine.pauseMusic() -- 暂停音乐
- elseif nIdx == 3 then
- -- resume background music
- AudioEngine.resumeMusic() -- 继续播放音乐
- -- rewind background music
- elseif nIdx == 4 then
- AudioEngine.rewindMusic() -- 循环播放
- elseif nIdx == 5 then
- -- is background music playing
- if AudioEngine.isMusicPlaying () then -- 音乐正在播放
- cclog("background music is playing")
- else
- cclog("background music is not playing")
- end
- elseif nIdx == 6 then
- -- play effect
- m_nSoundId = AudioEngine.playEffect(EFFECT_FILE) -- 播放音效
- elseif nIdx == 7 then
- -- play effect
- m_nSoundId = AudioEngine.playEffect(EFFECT_FILE, true) -- 播放音效，第二个参数表示是否循环，true表示循环
- elseif nIdx == 8 then
- -- stop effect
- AudioEngine.stopEffect(m_nSoundId) -- 停止音效
- elseif nIdx == 9 then
- -- unload effect
- AudioEngine.unloadEffect(EFFECT_FILE) -- 不加载音效
- elseif nIdx == 10 then
- -- add bakcground music volume
- AudioEngine.setMusicVolume(AudioEngine.getMusicVolume() + 0.1) -- 增加音量
- elseif nIdx == 11 then
- -- sub backgroud music volume
- AudioEngine.setMusicVolume(AudioEngine.getMusicVolume() - 0.1) -- 减小音量
- elseif nIdx == 12 then
- -- add effects volume
- AudioEngine.setEffectsVolume(AudioEngine.getEffectsVolume() + 0.1) -- 增加音效音量
- elseif nIdx == 13 then
- -- sub effects volume
- AudioEngine.setEffectsVolume(AudioEngine.getEffectsVolume() - 0.1) -- 减少音效音量
- elseif nIdx == 14 then
- AudioEngine.pauseEffect(m_nSoundId) -- 暂停音效
- elseif nIdx == 15 then
- AudioEngine.resumeEffect(m_nSoundId) -- 恢复音效
- elseif nIdx == 16 then
- AudioEngine.pauseAllEffects() -- 暂停所有音效
- elseif nIdx == 17 then
- AudioEngine.resumeAllEffects() -- 恢复所有音效
- elseif nIdx == 18 then
- AudioEngine.stopAllEffects() -- 停止所有音效
- end
- end
- -- add menu items for tests
- m_pItmeMenu = cc.Menu:create() -- 创建菜单
- m_nTestCount = table.getn(testItems)
- local i = 1
- for i = 1, m_nTestCount do
- local label = cc.Label:createWithTTF(testItems[i], s_arialPath, 24)
- label:setAnchorPoint(cc.p(0.5, 0.5))
- local pMenuItem = cc.MenuItemLabel:create(label) -- 菜单标签
- pMenuItem:registerScriptTapHandler(menuCallback) -- 注册菜单回调方法
- m_pItmeMenu:addChild(pMenuItem, i + 10000 -1)
- pMenuItem:setPosition( cc.p( VisibleRect:center().x, (VisibleRect:top().y - i * LINE_SPACE) ))
- end
- -- 设置菜单内容大小
- m_pItmeMenu:setContentSize(cc.size(VisibleRect:getVisibleRect().width, (m_nTestCount + 1) * LINE_SPACE))
- m_pItmeMenu:setPosition(cc.p(0, 0))
- ret:addChild(m_pItmeMenu)
- -- preload background music and effect
- AudioEngine.preloadMusic( MUSIC_FILE ) -- 预加载音乐
- AudioEngine.preloadEffect( EFFECT_FILE ) -- 预加载音效
- -- set default volume
- AudioEngine.setEffectsVolume(0.5) -- 设置音效音量
- AudioEngine.setMusicVolume(0.5) -- 设置音乐音量
- local function onNodeEvent(event)
- if event == "enter" then -- 进来时
- elseif event == "exit" then -- 退出时
- AudioEngine.destroyInstance() -- 销毁对象
- end
- end
- -- 注册层的结点事件
- ret:registerScriptHandler(onNodeEvent)
- local prev = {x = 0, y = 0}
- local function onTouchEvent(eventType, x, y)
- if eventType == "began" then -- 开始点击
- prev.x = x
- prev.y = y
- m_tBeginPos = cc.p(x, y) -- 开始点击位置
- return true
- elseif eventType == "moved" then -- 移动事件
- local touchLocation = cc.p(x, y) -- 获取触摸的位置
- local nMoveY = touchLocation.y - m_tBeginPos.y -- 触摸位置减去开始位置等于移动的距离
- local curPosX, curPosY = m_pItmeMenu:getPosition() -- 获取当前菜单的位置
- local curPos = cc.p(curPosX, curPosY) -- 当前位置
- local nextPos = cc.p(curPos.x, curPos.y + nMoveY) -- 下一个位置
- if nextPos.y < 0.0 then
- m_pItmeMenu:setPosition(cc.p(0, 0))
- end
- if nextPos.y > ((m_nTestCount + 1)* LINE_SPACE - VisibleRect:getVisibleRect().height) then
- m_pItmeMenu:setPosition(cc.p(0, ((m_nTestCount + 1)* LINE_SPACE - VisibleRect:getVisibleRect().height)))
- end
- m_pItmeMenu:setPosition(nextPos)
- m_tBeginPos.x = touchLocation.x -- 重新记录开始位置
- m_tBeginPos.y = touchLocation.y
- prev.x = x
- prev.y = y
- end
- end
- -- 触摸开始回调方法
- local function onTouchBegan(touch, event)
- local location = touch:getLocation()
- prev.x = location.x
- prev.y = location.y
- m_tBeginPos = location
- return true
- end
- -- 触摸移动的回调方法
- local function onTouchMoved(touch, event)
- local location = touch:getLocation()
- local touchLocation = location
- local nMoveY = touchLocation.y - m_tBeginPos.y
- local curPosX, curPosY = m_pItmeMenu:getPosition()
- local curPos = cc.p(curPosX, curPosY)
- local nextPos = cc.p(curPos.x, curPos.y + nMoveY)
- if nextPos.y < 0.0 then
- m_pItmeMenu:setPosition(cc.p(0, 0))
- end
- if nextPos.y > ((m_nTestCount + 1)* LINE_SPACE - VisibleRect:getVisibleRect().height) then
- m_pItmeMenu:setPosition(cc.p(0, ((m_nTestCount + 1)* LINE_SPACE - VisibleRect:getVisibleRect().height)))
- end
- m_pItmeMenu:setPosition(nextPos)
- m_tBeginPos.x = touchLocation.x
- m_tBeginPos.y = touchLocation.y
- prev.x = location.x
- prev.y = location.y
- end
- -- 单点触摸
- local listener = cc.EventListenerTouchOneByOne:create()
- listener:setSwallowTouches(true)
- -- 注册脚本监听事件
- listener:registerScriptHandler(onTouchBegan,cc.Handler.EVENT_TOUCH_BEGAN )
- listener:registerScriptHandler(onTouchMoved,cc.Handler.EVENT_TOUCH_MOVED )
- local eventDispatcher = ret:getEventDispatcher()
- eventDispatcher:addEventListenerWithSceneGraphPriority(listener, ret)
- return ret
- end
- function CocosDenshionTestMain()
- cclog("CocosDenshionTestMain")
- local scene = cc.Scene:create()
- scene:addChild(CocosDenshionTest())
- scene:addChild(CreateBackMenuItem())
- return scene
- end
