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refactor(audio): extract IFormatDecoder/WavFormatDecoder and wire Content-Type to JS format selection

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StreamDecoder is now format-agnostic; WavFormatDecoder delegates to WavUtils; contentType flows C# to JS.
This commit is contained in:
daniel-c-harvey
2026-06-11 06:08:09 -04:00
parent f8186fb7c7
commit 0b0bcb3dee
9 changed files with 308 additions and 105 deletions
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DeepDrftPublic/Interop/wavutils.ts
+4 -2
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@@ -123,7 +123,9 @@ class WavUtils {
};
}
static createHeader(wavHeader: WavHeader, dataSize: number): Uint8Array {
static createHeader(
wavHeader: Pick<WavHeader, 'channels' | 'sampleRate' | 'byteRate' | 'blockAlign' | 'bitsPerSample'>,
dataSize: number): Uint8Array {
const header = new ArrayBuffer(44);
const view = new DataView(header);
@@ -195,7 +197,7 @@ class WavUtils {
buffer[43] = (audioDataSize >> 24) & 0xFF;
}
static getSampleAlignedChunkSize(header: WavHeader, maxChunkSize: number, availableDataSize: number, streamComplete: boolean = false): number {
static getSampleAlignedChunkSize(header: Pick<WavHeader, 'blockAlign'>, maxChunkSize: number, availableDataSize: number, streamComplete: boolean = false): number {
const frameSize = header.blockAlign;
// Much smaller minimum for streaming - just enough for Web Audio API.