From 074785cea106179cb3305637055ab0a009ca74f2 Mon Sep 17 00:00:00 2001 From: Peter Bengtsson Date: Tue, 8 Dec 2020 14:42:52 -0500 Subject: initial commit --- files/pl/web/api/audioparam/index.html | 224 +++++++++++++++++++++ .../web/api/audioparam/setvalueattime/index.html | 182 +++++++++++++++++ 2 files changed, 406 insertions(+) create mode 100644 files/pl/web/api/audioparam/index.html create mode 100644 files/pl/web/api/audioparam/setvalueattime/index.html (limited to 'files/pl/web/api/audioparam') diff --git a/files/pl/web/api/audioparam/index.html b/files/pl/web/api/audioparam/index.html new file mode 100644 index 0000000000..390e9726f5 --- /dev/null +++ b/files/pl/web/api/audioparam/index.html @@ -0,0 +1,224 @@ +--- +title: AudioParam +slug: Web/API/AudioParam +tags: + - API + - Audio + - AudioParam + - Interface + - NeedsTranslation + - Reference + - TopicStub + - Web Audio API +translation_of: Web/API/AudioParam +--- +

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

+ +
+

The AudioParam interface represents an audio-related parameter, usually a parameter of an {{domxref("AudioNode")}} (such as {{ domxref("GainNode.gain") }}). An AudioParam can be set to a specific value or a change in value, and can be scheduled to happen at a specific time and following a specific pattern.

+
+ +

There are two kinds of AudioParam, a-rate and k-rate parameters:

+ + + +

Each {{domxref("AudioNode")}} defines which of its parameters are a-rate or k-rate in the spec.

+ +

Each AudioParam has a list of events, initially empty, that define when and how values change. When this list is not empty, changes using the AudioParam.value attributes are ignored. This list of events allows us to schedule changes that have to happen at very precise times, using arbitrary timelime-based automation curves. The time used is the one defined in {{domxref("AudioContext.currentTime")}}.

+ +

Properties

+ +

AudioParam Inherits properties from its parent, AudioNode.

+ +
+
{{domxref("AudioParam.defaultValue")}} {{readonlyInline}}
+
Represents the initial volume of the attribute as defined by the specific {{domxref("AudioNode")}} creating the AudioParam.
+
{{domxref("AudioParam.maxValue")}} {{readonlyInline}}
+
Represents the maximum possible value for the parameter's nominal (effective) range. 
+
{{domxref("AudioParam.minValue")}} {{readonlyinline}}
+
Represents the minimum possible value for the parameter's nominal (effective) range. 
+
{{domxref("AudioParam.value")}}
+
Represents the parameter's current volume as a floating point value; initially set to the value of AudioParam.defaultValue. Though it can be set, any modifications happening while there are automation events scheduled — that is events scheduled using the methods of the AudioParam — are ignored, without raising any exception.
+
+ +

Methods

+ +

AudioParam Inherits methods from its parent, AudioNode.

+ +
+
{{domxref("AudioParam.setValueAtTime()")}}
+
Schedules an instant change to the value of the AudioParam at a precise time, as measured against {{domxref("AudioContext.currentTime")}}. The new value is given in the value parameter.
+
{{domxref("AudioParam.linearRampToValueAtTime()")}}
+
Schedules a gradual linear change in the value of the AudioParam. The change starts at the time specified for the previous event, follows a linear ramp to the new value given in the value parameter, and reaches the new value at the time given in the endTime parameter.
+
{{domxref("AudioParam.exponentialRampToValueAtTime()")}}
+
Schedules a gradual exponential change in the value of the AudioParam. The change starts at the time specified for the previous event, follows an exponential ramp to the new value given in the value parameter, and reaches the new value at the time given in the endTime parameter.
+
{{domxref("AudioParam.setTargetAtTime()")}}
+
Schedules the start of a change to the value of the AudioParam. The change starts at the time specified in startTime and exponentially moves towards the value given by the target parameter. The exponential decay rate is defined by the timeConstant parameter, which is a time measured in seconds.
+
{{domxref("AudioParam.setValueCurveAtTime()")}}
+
Schedules the values of the AudioParam to follow a set of values, defined by the values {{domxref("Float32Array")}} scaled to fit into the given interval, starting at startTime, and having a specific duration.
+
{{domxref("AudioParam.cancelScheduledValues()")}}
+
Cancels all scheduled future changes to the AudioParam.
+
{{domxref("AudioParam.cancelAndHoldAtTime()")}}
+
Cancels all scheduled future changes to the AudioParam but holds its value at a given time until further changes are made using other methods. The new value is given in the value parameter.
+
+ +

Examples

+ +

First, a basic example showing a {{domxref("GainNode")}} having its gain value set. gain is an example of an a-rate AudioParam, as the value can potentially be set differently for each sample frame of the audio.

+ +
var AudioContext = window.AudioContext || window.webkitAudioContext;
+var audioCtx = new AudioContext();
+
+var gainNode = audioCtx.createGain();
+gainNode.gain.value = 0;
+ +

Next, an example showing a {{ domxref("BiquadFilterNode") }} having some values set. These are examples of k-rate AudioParam's, as the values are set for the entire audio block at once.

+ +
var AudioContext = window.AudioContext || window.webkitAudioContext;
+var audioCtx = new AudioContext();
+
+var biquadFilter = audioCtx.createBiquadFilter();
+
+biquadFilter.type = "lowshelf";
+biquadFilter.frequency.value = 1000;
+biquadFilter.gain.value = 25;
+ +

Specifications

+ + + + + + + + + + + + + + +
SpecificationStatusComment
{{SpecName('Web Audio API', '#the-audioparam-interface', 'AudioParam')}}{{Spec2('Web Audio API')}} 
+ +

Browser compatibility

+ +
{{CompatibilityTable}}
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FeatureChromeEdgeFirefox (Gecko)Internet ExplorerOperaSafari (WebKit)
Basic support{{CompatChrome(14)}} {{property_prefix("webkit")}}{{CompatVersionUnknown}}{{CompatGeckoDesktop(23)}}{{CompatNo}}15 {{property_prefix("webkit")}}
+ 22 (unprefixed)		6 {{property_prefix("webkit")}}
Unprefixed{{CompatVersionUnknown}}{{CompatVersionUnknown}}{{CompatVersionUnknown}}{{CompatNo}}{{CompatVersionUnknown}}{{CompatNo}}
minValue and maxValue{{CompatChrome(52)}}{{CompatNo}}{{CompatVersionUnknown}}{{CompatNo}}39{{CompatNo}}
cancelAndHoldAtTime(){{CompatChrome(57)}}{{CompatNo}}{{CompatNo}}{{CompatNo}}{{CompatNo}}{{CompatNo}}
+
+ +
+ + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + +
FeatureAndroid WebviewChrome for AndroidEdgeFirefox Mobile (Gecko)IE PhoneOpera MobileSafari Mobile
Basic support{{CompatVersionUnknown}}{{CompatChrome(28)}} {{property_prefix("webkit")}}{{CompatVersionUnknown}}{{CompatGeckoMobile(25)}}{{CompatNo}}{{CompatNo}}6 {{property_prefix("webkit")}}
Unprefixed{{CompatVersionUnknown}}{{CompatVersionUnknown}}{{CompatVersionUnknown}}{{CompatVersionUnknown}}{{CompatNo}}{{CompatVersionUnknown}}{{CompatNo}}
minValue and maxValue{{CompatChrome(52)}}{{CompatChrome(52)}}{{CompatNo}}{{CompatVersionUnknown}}{{CompatNo}}39{{CompatNo}}
cancelAndHoldAtTime(){{CompatChrome(57)}}{{CompatChrome(57)}}{{CompatNo}}{{CompatNo}}{{CompatNo}}{{CompatNo}}{{CompatNo}}
+
+ +

See also

+ + diff --git a/files/pl/web/api/audioparam/setvalueattime/index.html b/files/pl/web/api/audioparam/setvalueattime/index.html new file mode 100644 index 0000000000..7d733e7b2b --- /dev/null +++ b/files/pl/web/api/audioparam/setvalueattime/index.html @@ -0,0 +1,182 @@ +--- +title: AudioParam.setValueAtTime() +slug: Web/API/AudioParam/setValueAtTime +tags: + - API + - AudioParam + - Metodă + - Referencja + - Web Audio API + - setValueAtTime +translation_of: Web/API/AudioParam/setValueAtTime +--- +

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

+ +
+

Metoda setValueAtTime() interfejsu {{ domxref("AudioParam") }} odpowiada za precyzyjne przyporządkowanie nagłych zmian do wartości {{domxref("AudioParam")}} w określonym czasie względem {{domxref("AudioContext.currentTime")}}. Nowa wartość zostaje podana w wartości parametru.

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+ +

Składnia

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var AudioParam = AudioParam.setValueAtTime(value, startTime)
+ +

Parametry

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+
value
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Liczba zmiennoprzecinkowa reprezentująca wartość AudioParam przyporządkuje się do podanego czasu.
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startTime
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Zmienna double reprezentująca czas (w sekundach) po {{ domxref("AudioContext") }} została utworzona jako pierwsza, dzięki czemu dochodzi do zmiany wartości. {{jsxref("TypeError")}} zostanie zwrócony, jeśli uzyskana wartość jest negatywna.
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Zwracanie wartości funkcji (return)

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Odnośnik do obiektu AudioParam. W niektórych przeglądarkach wprowadzenie tego interfejsu zaskutkuje zwróceniem pustego typu danych (void).

+ +

Przykłady

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Ten stosunkowo prosty przykład zawiera źródło mediaelementu z dwiema kontrolkami (sprawdź kod źródłowy poprzez nasze repo audio-param lub zobacz przykład live). Jeśli kontrolki są wciśnięte, zmienna currGain jest inkrementowana/dekrementowana o 0.25. Wówczas metoda setValueAtTime() zostaje użyta do ustawienia wartości przedwzmacniacza (gain) jako równej currGain, jedną sekundę od teraz (audioCtx.currentTime + 1).

+ +
// utworzenie kontekstu audio
+var AudioContext = window.AudioContext || window.webkitAudioContext;
+var audioCtx = new AudioContext();
+
+// podanie podstawowych zmiennych dla przykładu
+var myAudio = document.querySelector('audio');
+var pre = document.querySelector('pre');
+var myScript = document.querySelector('script');
+
+pre.innerHTML = myScript.innerHTML;
+
+var targetAtTimePlus = document.querySelector('.set-target-at-time-plus');
+var targetAtTimeMinus = document.querySelector('.set-target-at-time-minus');
+
+// utworzenie MediaElementAudioSourceNode
+// wprowadzenie HTMLMediaElement
+var source = audioCtx.createMediaElementSource(myAudio);
+
+// utworzenie parametrów przedwzmacniacza (gain node) i ustawienie wartości przedwzmacniacza na wartość 0.5
+var gainNode = audioCtx.createGain();
+gainNode.gain.value = 0.5;
+var currGain = gainNode.gain.value;
+
+// podłączenie AudioBufferSourceNode do gainNode
+// oraz gainNode do destynacji
+source.connect(gainNode);
+gainNode.connect(audioCtx.destination);
+
+// określenie, co ma się wykonać po kliknięciu
+targetAtTimePlus.onclick = function() {
+  currGain += 0.25;
+  gainNode.gain.setValueAtTime(currGain, audioCtx.currentTime + 1);
+}
+
+targetAtTimeMinus.onclick = function() {
+  currGain -= 0.25;
+  gainNode.gain.setValueAtTime(currGain, audioCtx.currentTime + 1);
+}
+ +

Specyfikacje

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SpecifikacjaStatusKomentarz
{{SpecName('Web Audio API', '#widl-AudioParam-setValueAtTime-void-float-value-double-startTime', 'setValueAtTime')}}{{Spec2('Web Audio API')}} 
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Zgodność z przeglądarkami

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{{CompatibilityTable}}
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CechaChromeEdgeFirefox (Gecko)Internet ExplorerOperaSafari (WebKit)
Wsparcie podstawowe{{CompatChrome(14)}} {{property_prefix("webkit")}}{{CompatVersionUnknown}}23{{CompatNo}}15 {{property_prefix("webkit")}}
+ 22 (unprefixed)		6 {{property_prefix("webkit")}}
Bez prefiksu{{CompatVersionUnknown}}{{CompatVersionUnknown}}    
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CechaAndroidAndroid WebviewEdgeFirefox Mobile (Gecko)Firefox OSIE PhoneOpera MobileSafari MobileChrome for Android
Wsparcie podstawowe{{CompatNo}}{{CompatVersionUnknown}}{{CompatVersionUnknown}}251.2{{CompatNo}}{{CompatNo}}6 {{property_prefix("webkit")}}{{CompatChrome(28)}} {{property_prefix("webkit")}}
Bez prefiksu{{CompatUnknown}}{{CompatVersionUnknown}}{{CompatVersionUnknown}}     {{CompatVersionUnknown}}
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Zobacz również

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