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Merge pull request #854 from daslyfe/audio_device_selection

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Audio device selection
This commit is contained in:
Felix Roos 2023-12-31 10:03:00 +01:00 • committed by GitHub
commit aa18293f1d
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7 changed files with 143 additions and 9 deletions
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24
packages/superdough/superdough.mjs
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@ -28,11 +28,13 @@ export const resetLoadedSounds = () => soundMap.set({});
let audioContext;
export const setDefaultAudioContext = () => {
audioContext = new AudioContext();
};
export const getAudioContext = () => {
if (!audioContext) {
audioContext = new AudioContext();
const maxChannelCount = audioContext.destination.maxChannelCount;
audioContext.destination.channelCount = maxChannelCount;
setDefaultAudioContext();
}
return audioContext;
};
@ -84,15 +86,22 @@ let delays = {};
const maxfeedback = 0.98;
let channelMerger, destinationGain;
//update the output channel configuration to match user's audio device
export function initializeAudioOutput() {
const audioContext = getAudioContext();
const maxChannelCount = audioContext.destination.maxChannelCount;
audioContext.destination.channelCount = maxChannelCount;
channelMerger = new ChannelMergerNode(audioContext, { numberOfInputs: audioContext.destination.channelCount });
destinationGain = new GainNode(audioContext);
channelMerger.connect(destinationGain);
destinationGain.connect(audioContext.destination);
}
// input: AudioNode, channels: ?Array<int>
export const connectToDestination = (input, channels = [0, 1]) => {
const ctx = getAudioContext();
if (channelMerger == null) {
channelMerger = new ChannelMergerNode(ctx, { numberOfInputs: ctx.destination.channelCount });
destinationGain = new GainNode(ctx);
channelMerger.connect(destinationGain);
destinationGain.connect(ctx.destination);
initializeAudioOutput();
}
//This upmix can be removed if correct channel counts are set throughout the app,
// and then strudel could theoretically support surround sound audio files
@ -114,6 +123,7 @@ export const panic = () => {
}
destinationGain.gain.linearRampToValueAtTime(0, getAudioContext().currentTime + 0.01);
destinationGain = null;
channelMerger == null;
};
function getDelay(orbit, delaytime, delayfeedback, t) {