Bug 214926 – Added copyFromChannel, copyToChannel to AudioBuffer

• Component: Web Audio
• Status: RESOLVED FIXED

[Clark Wang]

Added copyFromChannel, copyToChannel methods to AudioBuffer according to spec: https://www.w3.org/TR/webaudio/#dom-audiobuffer-copyfromchannel-destination.

[Clark Wang]

Created attachment 405477 [details]
Patch

[Darin Adler]

Comment on attachment 405477 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=405477&action=review

> Source/WebCore/Modules/webaudio/AudioBuffer.h:57
> +    ExceptionOr<void> copyFromChannel(Ref<Float32Array>, size_t channelNumber, size_t bufferOffset);
> +    ExceptionOr<void> copyToChannel(Ref<Float32Array>, size_t channelNumber, size_t startInChannel);

Ref<Float32Array> is not the correct argument type; creates unnecessary reference count churn. Ref<Float32Array>&& is better.

[Chris Dumez]

Comment on attachment 405477 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=405477&action=review

> Source/WebCore/Modules/webaudio/AudioBuffer.cpp:128
> +ExceptionOr<void> AudioBuffer::copyFromChannel(Ref<Float32Array> destination, size_t channelNumber, size_t bufferOffset)

Ref<Float32Array>&&. It may be a good idea to use unsigned type for the other parameters, to match the IDL

> Source/WebCore/Modules/webaudio/AudioBuffer.cpp:130
> +    if (destination.get().isShared())

destination->isShared()

> Source/WebCore/Modules/webaudio/AudioBuffer.cpp:134
> +        return Exception { IndexSizeError, "channelNumber is out of index."_s };

"out of index" ?

> Source/WebCore/Modules/webaudio/AudioBuffer.cpp:147
> +    float* dst = destination.get().data();

destination->data()

> Source/WebCore/Modules/webaudio/AudioBuffer.cpp:156
> +ExceptionOr<void> AudioBuffer::copyToChannel(Ref<Float32Array> source, size_t channelNumber, size_t bufferOffset)

Ref<Float32Array>&& and unsigned for others.

> Source/WebCore/Modules/webaudio/AudioBuffer.cpp:162
> +        return Exception { IndexSizeError, "channelNumber is out of index."_s };

"out of index"?

[Clark Wang]

Created attachment 405491 [details]
Patch

[Clark Wang]

Created attachment 405498 [details]
Patch

[Clark Wang]

New patch includes a re-baselined test that incorporates new ExceptionError message.

[EWS]

Committed r265062: <https://trac.webkit.org/changeset/265062>

All reviewed patches have been landed. Closing bug and clearing flags on attachment 405498 [details].

[Radar WebKit Bug Importer]

<rdar://problem/66294740>