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Merge pull request #6359 from matrix-org/travis/voice-messages/samplesssss

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Increase sample count in voice message thumbnail
This commit is contained in:
Travis Ralston
2021-07-12 14:18:22 -06:00
committed by GitHub
parent cbce71fd8e e045aa940e
commit 199c80315e
2 changed files with 9 additions and 1 deletions
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8
src/voice/Playback.ts
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@@ -31,6 +31,7 @@ export enum PlaybackState {
}
export const PLAYBACK_WAVEFORM_SAMPLES = 39;
const THUMBNAIL_WAVEFORM_SAMPLES = 100; // arbitrary: [30,120]
const DEFAULT_WAVEFORM = arraySeed(0, PLAYBACK_WAVEFORM_SAMPLES);
function makePlaybackWaveform(input: number[]): number[] {
@@ -51,6 +52,12 @@ function makePlaybackWaveform(input: number[]): number[] {
}
export class Playback extends EventEmitter implements IDestroyable {
/**
* Stable waveform for representing a thumbnail of the media. Values are
* guaranteed to be between zero and one, inclusive.
*/
public readonly thumbnailWaveform: number[];
private readonly context: AudioContext;
private source: AudioBufferSourceNode;
private state = PlaybackState.Decoding;
@@ -72,6 +79,7 @@ export class Playback extends EventEmitter implements IDestroyable {
this.fileSize = this.buf.byteLength;
this.context = createAudioContext();
this.resampledWaveform = arrayFastResample(seedWaveform ?? DEFAULT_WAVEFORM, PLAYBACK_WAVEFORM_SAMPLES);
this.thumbnailWaveform = arrayFastResample(seedWaveform ?? DEFAULT_WAVEFORM, THUMBNAIL_WAVEFORM_SAMPLES);
this.waveformObservable.update(this.resampledWaveform);
this.clock = new PlaybackClock(this.context);
}