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upload save wav file logic

This commit is contained in:
lloydzhou 2024-11-07 09:36:22 +08:00
parent cf46d5ad63
commit 522627820a
1 changed files with 9 additions and 10 deletions
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19
app/lib/audio.ts
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@ -131,11 +131,11 @@ export class AudioHandler {
_saveData(data: Int16Array, bytesPerSample = 16): Blob { _saveData(data: Int16Array, bytesPerSample = 16): Blob {
const headerLength = 44; const headerLength = 44;
const numberOfChannels = 1; const numberOfChannels = 1;
const dataLength = data.length; const byteLength = data.buffer.byteLength;
const wav = new Uint8Array(headerLength + dataLength * 2); const header = new Uint8Array(headerLength);
const view = new DataView(wav.buffer); const view = new DataView(header.buffer);
view.setUint32(0, 1380533830, false); // RIFF identifier 'RIFF' view.setUint32(0, 1380533830, false); // RIFF identifier 'RIFF'
view.setUint32(4, 36 + dataLength * 2, true); // file length minus RIFF identifier length and file description length view.setUint32(4, 36 + byteLength, true); // file length minus RIFF identifier length and file description length
view.setUint32(8, 1463899717, false); // RIFF type 'WAVE' view.setUint32(8, 1463899717, false); // RIFF type 'WAVE'
view.setUint32(12, 1718449184, false); // format chunk identifier 'fmt ' view.setUint32(12, 1718449184, false); // format chunk identifier 'fmt '
view.setUint32(16, 16, true); // format chunk length view.setUint32(16, 16, true); // format chunk length
@ -146,14 +146,13 @@ export class AudioHandler {
view.setUint16(32, numberOfChannels * 2, true); // block align (channel count * bytes per sample) view.setUint16(32, numberOfChannels * 2, true); // block align (channel count * bytes per sample)
view.setUint16(34, bytesPerSample, true); // bits per sample view.setUint16(34, bytesPerSample, true); // bits per sample
view.setUint32(36, 1684108385, false); // data chunk identifier 'data' view.setUint32(36, 1684108385, false); // data chunk identifier 'data'
view.setUint32(40, dataLength * 2, true); // data chunk length view.setUint32(40, byteLength, true); // data chunk length
for (let i = 0; i < dataLength; i++) {
view.setInt16(44 + i * 2, data[i], true); // using data.buffer, so no need to setUint16 to view.
} return new Blob([view, data.buffer], { type: "audio/mpeg" });
return new Blob([view], { type: "audio/mpeg" });
} }
savePlayFile() { savePlayFile() {
return this._saveData(this.playBuffer); return this._saveData(new Int16Array(this.playBuffer));
} }
async close() { async close() {
this.workletNode?.disconnect(); this.workletNode?.disconnect();