注： 这里的h5主要是指mobile上的chrome和safari, pc未测试，也不关心。
音效播放，两个方案
- 通过原生的audio标签
<audio src="xxx.mp3" />
优点是android和ios支持，缺点也很明显，无法预加载，且需要用户主动触发才可以播放。
- 通过WebAudio Api来做
cocos2dx中也是封装的这种方法，缺点是大部分android手机不支持，优点是可以预先加载，不需主动触发。
Created
February 12, 2015 07:48
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h5音效播放
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <meta charset="utf-8"> | |
| <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0, user-scalable=no"> | |
| <meta name="full-screen" content="yes"/> | |
| <meta name="x5-fullscreen" content="true"/> | |
| </head> | |
| <body> | |
| <button id="playBtn" >点击播放</button> | |
| <audio id="audio" /> | |
| <script src="/javascripts/sound.js"></script> | |
| </body> | |
| </html> |
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| /** | |
| * Created by hhuai on 2/12/15. | |
| */ | |
| document.addEventListener('DOMContentLoaded', function(){ | |
| var audio = document.getElementById('audio'); | |
| audio.src="/kiss/res/mua.mp3"; | |
| }); | |
| var mySource; | |
| if('webkitAudioContext' in window){ | |
| var audio_ctx = new webkitAudioContext(); | |
| function loadMusic(url) { | |
| var req = new XMLHttpRequest(); | |
| req.open('GET', url, true); | |
| req.responseType = 'arraybuffer'; | |
| req.addEventListener('load',bufferSound, false); | |
| req.send(); | |
| } | |
| function bufferSound(event) { | |
| var request = event.target; | |
| audio_ctx.decodeAudioData(request.response, function(buffer){ | |
| var source = audio_ctx.createBufferSource(); | |
| source.buffer = buffer; | |
| source.connect(audio_ctx.destination); | |
| // Create a volume (gain) node | |
| if(typeof audio_ctx.createGainNode === 'function'){ | |
| var volumeNode = audio_ctx.createGainNode(); | |
| } else { | |
| var volumeNode = audio_ctx.createGain(); | |
| } | |
| volumeNode.gain.value = 1.0; | |
| source.connect(volumeNode); | |
| mySource = source; | |
| playSound(); | |
| }, function(e){ console.log("Error with decoding audio data" + e)}); | |
| } | |
| loadMusic("/kiss/res/mua.mp3"); | |
| } | |
| function playSound() { | |
| if(mySource) { | |
| if(typeof mySource.noteOn === 'function' ) | |
| {mySource.noteOn(0);} | |
| else | |
| mySource.start(); | |
| } else { | |
| var audio = document.getElementById("audio"); | |
| audio.play(); | |
| } | |
| } | |
| document.getElementById("playBtn").addEventListener('click', function(){ | |
| playSound(); | |
| }); | |
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