diff options
author | Peter Bengtsson <mail@peterbe.com> | 2020-12-08 14:40:17 -0500 |
---|---|---|
committer | Peter Bengtsson <mail@peterbe.com> | 2020-12-08 14:40:17 -0500 |
commit | 33058f2b292b3a581333bdfb21b8f671898c5060 (patch) | |
tree | 51c3e392513ec574331b2d3f85c394445ea803c6 /files/zh-cn/web/api/audiobuffer/samplerate/index.html | |
parent | 8b66d724f7caf0157093fb09cfec8fbd0c6ad50a (diff) | |
download | translated-content-33058f2b292b3a581333bdfb21b8f671898c5060.tar.gz translated-content-33058f2b292b3a581333bdfb21b8f671898c5060.tar.bz2 translated-content-33058f2b292b3a581333bdfb21b8f671898c5060.zip |
initial commit
Diffstat (limited to 'files/zh-cn/web/api/audiobuffer/samplerate/index.html')
-rw-r--r-- | files/zh-cn/web/api/audiobuffer/samplerate/index.html | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/files/zh-cn/web/api/audiobuffer/samplerate/index.html b/files/zh-cn/web/api/audiobuffer/samplerate/index.html new file mode 100644 index 0000000000..1de2c66fb5 --- /dev/null +++ b/files/zh-cn/web/api/audiobuffer/samplerate/index.html @@ -0,0 +1,81 @@ +--- +title: AudioBuffer.sampleRate +slug: Web/API/AudioBuffer/sampleRate +tags: + - API + - AudioBuffer + - Web Audio API + - sampleRate +translation_of: Web/API/AudioBuffer/sampleRate +--- +<p>{{ APIRef("Web Audio API") }}</p> + +<div> +<p>{{ domxref("AudioBuffer") }} 接口的 <code style="">sampleRate</code><span style='background-color: transparent; color: #333333; display: inline !important; float: none; font-family: "Open Sans",arial,x-locale-body,sans-serif; font-size: 16px; font-style: normal; font-variant: normal; font-weight: 400; letter-spacing: normal; text-align: left; text-decoration: none; text-indent: 0px; text-transform: none; white-space: normal;'> </span>属性返回一个以浮点数表示的采样率。该采样率是存储在缓冲区的PCM数据每秒钟的采样。</p> +</div> + +<h2 id="语法">语法</h2> + +<pre class="brush: js;highlight[22]">var myArrayBuffer = audioCtx.createBuffer(2, frameCount, audioCtx.sampleRate); +myArrayBuffer.sampleRate;</pre> + +<h3 id="返回值">返回值</h3> + +<p>一个浮点数,表示缓冲区数据的当前采样率。</p> + +<h2 id="示例">示例</h2> + +<pre class="brush: js;highlight[22]">// Stereo +var channels = 2; + +// Create an empty two second stereo buffer at the +// sample rate of the AudioContext +var frameCount = audioCtx.sampleRate * 2.0; +var myArrayBuffer = audioCtx.createBuffer(2, frameCount, audioCtx.sampleRate); + +button.onclick = function() { + // Fill the buffer with white noise; + // just random values between -1.0 and 1.0 + for (var channel = 0; channel < channels; channel++) { + // This gives us the actual ArrayBuffer that contains the data + var nowBuffering = myArrayBuffer.getChannelData(channel); + for (var i = 0; i < frameCount; i++) { + // Math.random() is in [0; 1.0] + // audio needs to be in [-1.0; 1.0] + nowBuffering[i] = Math.random() * 2 - 1; + } + } + + console.log(myArrayBuffer.sampleRate); +}</pre> + +<h2 id="规范">规范</h2> + +<table class="standard-table"> + <tbody> + <tr> + <th scope="col">Specification</th> + <th scope="col">Status</th> + <th scope="col">Comment</th> + </tr> + <tr> + <td>{{SpecName('Web Audio API', '#widl-AudioBuffer-sampleRate', 'sampleRate')}}</td> + <td>{{Spec2('Web Audio API')}}</td> + <td> </td> + </tr> + </tbody> +</table> + +<h2 id="浏览器兼容性">浏览器兼容性</h2> + +<div> + + +<p>{{Compat("api.AudioBuffer.sampleRate")}}</p> +</div> + +<h2 id="相关链接">相关链接</h2> + +<ul> + <li><a href="/en-US/docs/Web/API/Web_Audio_API/Using_Web_Audio_API">Using the Web Audio API</a></li> +</ul> |