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LibWeb: Add ChannelSplitterNode interface

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Tim Ledbetter 2025-01-01 22:00:52 +00:00 • committed by Tim Ledbetter
parent 819178a49e
commit e564d25ffb
Notes: github-actions[bot] 2025-01-02 11:40:31 +00:00
9 changed files with 315 additions and 1 deletions
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87
Libraries/LibWeb/WebAudio/ChannelSplitterNode.cpp Normal file
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/*
* Copyright (c) 2025, Tim Ledbetter <tim.ledbetter@ladybird.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <LibWeb/Bindings/ChannelSplitterNodePrototype.h>
#include <LibWeb/Bindings/Intrinsics.h>
#include <LibWeb/WebAudio/BaseAudioContext.h>
#include <LibWeb/WebAudio/ChannelSplitterNode.h>
namespace Web::WebAudio {
GC_DEFINE_ALLOCATOR(ChannelSplitterNode);
ChannelSplitterNode::ChannelSplitterNode(JS::Realm& realm, GC::Ref<BaseAudioContext> context, ChannelSplitterOptions const& options)
: AudioNode(realm, context)
, m_number_of_outputs(options.number_of_outputs)
{
}
ChannelSplitterNode::~ChannelSplitterNode() = default;
WebIDL::ExceptionOr<GC::Ref<ChannelSplitterNode>> ChannelSplitterNode::create(JS::Realm& realm, GC::Ref<BaseAudioContext> context, ChannelSplitterOptions const& options)
{
return construct_impl(realm, context, options);
}
WebIDL::ExceptionOr<GC::Ref<ChannelSplitterNode>> ChannelSplitterNode::construct_impl(JS::Realm& realm, GC::Ref<BaseAudioContext> context, ChannelSplitterOptions const& options)
{
// https://webaudio.github.io/web-audio-api/#dom-baseaudiocontext-createchannelsplitter
// An IndexSizeError exception MUST be thrown if numberOfOutputs is less than 1 or is greater than the number of supported channels.
if (options.number_of_outputs < 1 || options.number_of_outputs > BaseAudioContext::MAX_NUMBER_OF_CHANNELS)
return WebIDL::IndexSizeError::create(realm, "Invalid number of outputs"_string);
auto node = realm.create<ChannelSplitterNode>(realm, context, options);
// Default options for channel count and interpretation
// https://webaudio.github.io/web-audio-api/#ChannelSplitterNode
AudioNodeDefaultOptions default_options;
default_options.channel_count_mode = Bindings::ChannelCountMode::Explicit;
default_options.channel_interpretation = Bindings::ChannelInterpretation::Discrete;
default_options.channel_count = node->number_of_outputs();
// FIXME: Set tail-time to no
TRY(node->initialize_audio_node_options(options, default_options));
return node;
}
void ChannelSplitterNode::initialize(JS::Realm& realm)
{
AudioNode::initialize(realm);
WEB_SET_PROTOTYPE_FOR_INTERFACE(ChannelSplitterNode);
}
WebIDL::ExceptionOr<void> ChannelSplitterNode::set_channel_count(WebIDL::UnsignedLong channel_count)
{
// https://webaudio.github.io/web-audio-api/#audionode-channelcount-constraints
// The channel count cannot be changed, and an InvalidStateError exception MUST be thrown for any attempt to change the value.
if (channel_count != m_number_of_outputs)
return WebIDL::InvalidStateError::create(realm(), "Channel count must be equal to number of outputs"_string);
return AudioNode::set_channel_count(channel_count);
}
WebIDL::ExceptionOr<void> ChannelSplitterNode::set_channel_count_mode(Bindings::ChannelCountMode channel_count_mode)
{
// https://webaudio.github.io/web-audio-api/#audionode-channelcountmode-constraints
// The channel count mode cannot be changed from "explicit" and an InvalidStateError exception MUST be thrown for any attempt to change the value.
if (channel_count_mode != Bindings::ChannelCountMode::Explicit)
return WebIDL::InvalidStateError::create(realm(), "Channel count mode must be 'explicit'"_string);
return AudioNode::set_channel_count_mode(channel_count_mode);
}
WebIDL::ExceptionOr<void> ChannelSplitterNode::set_channel_interpretation(Bindings::ChannelInterpretation channel_interpretation)
{
// https://webaudio.github.io/web-audio-api/#audionode-channelinterpretation-constraints
// The channel intepretation can not be changed from "discrete" and a InvalidStateError exception MUST be thrown for any attempt to change the value.
if (channel_interpretation != Bindings::ChannelInterpretation::Discrete)
return WebIDL::InvalidStateError::create(realm(), "Channel interpretation must be 'discrete'"_string);
return AudioNode::set_channel_interpretation(channel_interpretation);
}
}