From 1109132f09d75da9a28b649c7677bb6ce07c40c0 Mon Sep 17 00:00:00 2001 From: Peter Bengtsson Date: Tue, 8 Dec 2020 14:41:45 -0500 Subject: initial commit --- files/es/web/api/audiobuffer/index.html | 108 ++++++++++++++++++++++++++++++++ 1 file changed, 108 insertions(+) create mode 100644 files/es/web/api/audiobuffer/index.html (limited to 'files/es/web/api/audiobuffer') diff --git a/files/es/web/api/audiobuffer/index.html b/files/es/web/api/audiobuffer/index.html new file mode 100644 index 0000000000..1909323a6d --- /dev/null +++ b/files/es/web/api/audiobuffer/index.html @@ -0,0 +1,108 @@ +--- +title: AudioBuffer +slug: Web/API/AudioBuffer +translation_of: Web/API/AudioBuffer +--- +

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

+ +

La interfaz AudioBuffer representa un pequeño recurso de audio que se almacena en memoria, creado a partir de un archivo de audio usando el método {{ domxref("AudioContext.decodeAudioData()") }}, o de datos en bruto con el método {{ domxref("AudioContext.createBuffer()") }}. Una véz cargado en AudioBuffer, el audio puede ser reproducido pasandolo en el método {{ domxref("AudioBufferSourceNode") }}.

+ +

Objetos de este tipo son diseñados para almacenar pequeños trozos de audio, normalmente menos de 45 segundos. Para audios más extensos, los objectos implementan  {{domxref("MediaElementAudioSourceNode")}} que es más adecuado. El buffer contiene data en el siguiente formado: non-interleaved IEEE754 32-bit linear PCM with a nominal range between -1 and +1, that is, 32bits floating point buffer, with each samples between -1.0 and 1.0. If the {{domxref("AudioBuffer")}} has multiple channels, they are stored in separate buffer.

+ +

Constructor

+ +
+
{{domxref("AudioBuffer.AudioBuffer", "AudioBuffer()")}}
+
Crea y retorna una nueva instancia de AudioBuffer 
+
+ +

Propiedades

+ +
+
{{domxref("AudioBuffer.sampleRate")}} {{readonlyInline}}
+
Returns a float representing the sample rate, in samples per second, of the PCM data stored in the buffer.
+
{{domxref("AudioBuffer.length")}} {{readonlyInline}}
+
Returns an integer representing the length, in sample-frames, of the PCM data stored in the buffer.
+
{{domxref("AudioBuffer.duration")}} {{readonlyInline}}
+
Returns a double representing the duration, in seconds, of the PCM data stored in the buffer.
+
{{domxref("AudioBuffer.numberOfChannels")}} {{readonlyInline}}
+
Returns an integer representing the number of discrete audio channels described by the PCM data stored in the buffer.
+
+ +

Métodos

+ +
+
{{domxref("AudioBuffer.getChannelData()")}}
+
Returns a {{jsxref("Float32Array")}} containing the PCM data associated with the channel, defined by the channel parameter (with 0 representing the first channel).
+
{{domxref("AudioBuffer.copyFromChannel()")}}
+
Copies the samples from the specified channel of the AudioBuffer to the destination array.
+
{{domxref("AudioBuffer.copyToChannel()")}}
+
Copies the samples to the specified channel of the AudioBuffer, from the source array.
+
+ +

Ejemplo

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El siguiente ejemplo muestra como se crea un AudioBuffer  y rellena con un sonido blanco aleatorio. Puedes encontrar el código completo en nuestro repositorio: webaudio-examples; y una versión disponible: running live

+ +
var audioCtx = new (window.AudioContext || window.webkitAudioContext)();
+
+// Create an empty three-second stereo buffer at the sample rate of the AudioContext
+var myArrayBuffer = audioCtx.createBuffer(2, audioCtx.sampleRate * 3, audioCtx.sampleRate);
+
+// Fill the buffer with white noise;
+// just random values between -1.0 and 1.0
+for (var channel = 0; channel < myArrayBuffer.numberOfChannels; channel++) {
+  // This gives us the actual array that contains the data
+  var nowBuffering = myArrayBuffer.getChannelData(channel);
+  for (var i = 0; i < myArrayBuffer.length; 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;
+
+// connect the AudioBufferSourceNode to the
+// destination so we can hear the sound
+source.connect(audioCtx.destination);
+
+// start the source playing
+source.start();
+
+ +

Especificaciones

+ + + + + + + + + + + + + + +
SpecificationStatusComment
{{SpecName('Web Audio API', '#the-audiobuffer-interface', 'AudioBuffer')}}{{Spec2('Web Audio API')}}Initial definition.
+ +

Compatibilidad de navegadores

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+ + +

{{Compat("api.AudioBuffer")}}

+
+ +

Mira también

+ + -- cgit v1.2.3-54-g00ecf