From 33058f2b292b3a581333bdfb21b8f671898c5060 Mon Sep 17 00:00:00 2001 From: Peter Bengtsson Date: Tue, 8 Dec 2020 14:40:17 -0500 Subject: initial commit --- .../api/audiobuffersourcenode/buffer/index.html | 81 ++++++++++++++++++++++ 1 file changed, 81 insertions(+) create mode 100644 files/zh-cn/web/api/audiobuffersourcenode/buffer/index.html (limited to 'files/zh-cn/web/api/audiobuffersourcenode/buffer') diff --git a/files/zh-cn/web/api/audiobuffersourcenode/buffer/index.html b/files/zh-cn/web/api/audiobuffersourcenode/buffer/index.html new file mode 100644 index 0000000000..39591c82ba --- /dev/null +++ b/files/zh-cn/web/api/audiobuffersourcenode/buffer/index.html @@ -0,0 +1,81 @@ +--- +title: AudioBufferSourceNode.buffer +slug: Web/API/AudioBufferSourceNode/buffer +tags: + - API + - AudioBufferSourceNode + - Web Audio API +translation_of: Web/API/AudioBufferSourceNode/buffer +--- +

{{ APIRef("Web Audio API") }}

+ +

{{ domxref("AudioBufferSourceNode") }} 接口的 buffer 属性提供了重复播放音频的能力，该音频使用 {{domxref("AudioBuffer")}} 作为声音文件的来源。

+ +

如果 buffer 属性的值为 null, 节点会自动生成一个单声道的无声文件（所有采样均为0）。

+ +

语法

+ +
AudioBufferSourceNode.buffer = soundBuffer;
+
+ +

返回值

+ +

{{domxref("AudioBuffer")}}，包含了节点将要播放的声音数据。

+ +

示例

+ +
+

完整的示例请查看  this code running live，或  view the source。

+
+ +
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;
+   }
+  }
+
+  // Get an AudioBufferSourceNode.
+  // This is the AudioNode to use when we want to play an AudioBuffer
+  var source = audioCtx.createBufferSource();
+  // set the buffer in the AudioBufferSourceNode
+  source.buffer = myArrayBuffer;
+ +

规范

+ + + + + + + + + + + + + + + + +
SpecificationStatusComment
{{SpecName("Web Audio API", "#widl-AudioBufferSourceNode-buffer", "buffer")}}{{Spec2("Web Audio API")}}Initial definition
+ +

浏览器兼容性

+ +
+ + +

{{Compat("api.AudioBufferSourceNode.buffer")}}

+
+ +

相关链接

+ +

{{page("/en-US/docs/Web/API/AudioBufferSourceNode","See_also")}}

-- cgit v1.2.3-54-g00ecf