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Deal properly with truncated WAVE files

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Vanilagy
2025-06-23 15:53:31 +02:00
parent c546deed7a
commit e22839f5a2
1 changed files with 5 additions and 3 deletions
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src/wave/wave-demuxer.ts
+5 -3
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@@ -42,10 +42,12 @@ export class WaveDemuxer extends Demuxer {
async readMetadata() { async readMetadata() {
return this.metadataPromise ??= (async () => { return this.metadataPromise ??= (async () => {
const actualFileSize = await this.metadataReader.reader.source.getSize();
const riffType = this.metadataReader.readAscii(4); const riffType = this.metadataReader.readAscii(4);
this.metadataReader.littleEndian = riffType === 'RIFF'; this.metadataReader.littleEndian = riffType === 'RIFF';
const totalFileSize = this.metadataReader.readU32() + 8; const totalFileSize = Math.min(this.metadataReader.readU32() + 8, actualFileSize);
const format = this.metadataReader.readAscii(4); const format = this.metadataReader.readAscii(4);
if (format !== 'WAVE') { if (format !== 'WAVE') {
@@ -64,7 +66,7 @@ export class WaveDemuxer extends Demuxer {
await this.parseFmtChunk(chunkSize); await this.parseFmtChunk(chunkSize);
} else if (chunkId === 'data') { } else if (chunkId === 'data') {
this.dataStart = this.metadataReader.pos; this.dataStart = this.metadataReader.pos;
this.dataSize = chunkSize; this.dataSize = Math.min(chunkSize, totalFileSize - this.dataStart);
} }
this.metadataReader.pos = startPos + chunkSize + (chunkSize & 1); // Handle padding this.metadataReader.pos = startPos + chunkSize + (chunkSize & 1); // Handle padding
@@ -90,7 +92,7 @@ export class WaveDemuxer extends Demuxer {
let formatTag = this.metadataReader.readU16(); let formatTag = this.metadataReader.readU16();
const numChannels = this.metadataReader.readU16(); const numChannels = this.metadataReader.readU16();
const sampleRate = this.metadataReader.readU32(); const sampleRate = this.metadataReader.readU32();
this.metadataReader.pos += 4; this.metadataReader.pos += 4; // Bytes per second
const blockAlign = this.metadataReader.readU16(); const blockAlign = this.metadataReader.readU16();
let bitsPerSample: number; let bitsPerSample: number;