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Streaming Bug Fixes

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This commit is contained in:
daniel-c-harvey
2025-12-06 06:41:32 -05:00
parent 605fc94fbb
commit 2baf0575bc
17 changed files with 1510 additions and 1054 deletions
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DeepDrftWeb/Interop/wavutils.ts
+64 -32
View File
@@ -19,8 +19,9 @@ class WavUtils {
offset += chunk.length;
}
const view = new DataView(concatenated.buffer, 0, 44);
// Need a DataView that spans the entire buffer for chunk searching
const view = new DataView(concatenated.buffer);
// Check RIFF header
const riff = new TextDecoder().decode(concatenated.slice(0, 4));
if (riff !== 'RIFF') return null;
@@ -28,45 +29,76 @@ class WavUtils {
const wave = new TextDecoder().decode(concatenated.slice(8, 12));
if (wave !== 'WAVE') return null;
// Find fmt chunk with better alignment handling
let fmtOffset = 12;
while (fmtOffset < totalSize - 8) {
const chunkId = new TextDecoder().decode(concatenated.slice(fmtOffset, fmtOffset + 4));
const chunkSize = view.getUint32(fmtOffset + 4, true);
// Variables to store parsed header info
let sampleRate = 0;
let channels = 0;
let bitsPerSample = 0;
let byteRate = 0;
let blockAlign = 0;
let dataSize = 0;
let headerSize = 0;
let foundFmt = false;
let foundData = false;
// Find fmt and data chunks
let chunkOffset = 12;
while (chunkOffset < totalSize - 8) {
const chunkId = new TextDecoder().decode(concatenated.slice(chunkOffset, chunkOffset + 4));
const chunkSize = view.getUint32(chunkOffset + 4, true);
if (chunkId === 'fmt ') {
// Validate minimum fmt chunk size
if (chunkSize < 16) return null;
const audioFormat = view.getUint16(fmtOffset + 8, true);
if (audioFormat !== 1) return null; // Only PCM supported
const channels = view.getUint16(fmtOffset + 10, true);
const sampleRate = view.getUint32(fmtOffset + 12, true);
const byteRate = view.getUint32(fmtOffset + 16, true);
const blockAlign = view.getUint16(fmtOffset + 20, true);
const bitsPerSample = view.getUint16(fmtOffset + 22, true);
const audioFormat = view.getUint16(chunkOffset + 8, true);
// Support PCM (1) and IEEE Float (3) formats
if (audioFormat !== 1 && audioFormat !== 3) {
console.warn(`Unsupported audio format: ${audioFormat} (only PCM=1 and IEEE Float=3 supported)`);
return null;
}
channels = view.getUint16(chunkOffset + 10, true);
sampleRate = view.getUint32(chunkOffset + 12, true);
byteRate = view.getUint32(chunkOffset + 16, true);
blockAlign = view.getUint16(chunkOffset + 20, true);
bitsPerSample = view.getUint16(chunkOffset + 22, true);
// Basic validation
if (channels < 1 || channels > 8) return null;
if (blockAlign !== channels * (bitsPerSample / 8)) return null;
return {
sampleRate,
channels,
bitsPerSample,
byteRate,
blockAlign,
dataSize: 0, // Will be updated when we find data chunk
headerSize: 44
};
foundFmt = true;
console.log(`Found fmt chunk: ${bitsPerSample}-bit, ${channels}ch, ${sampleRate}Hz, format=${audioFormat}`);
}
// Move to next chunk with proper alignment
fmtOffset += 8 + ((chunkSize + 1) & ~1); // Ensure even alignment
else if (chunkId === 'data') {
dataSize = chunkSize;
headerSize = chunkOffset + 8; // Audio data starts after 'data' + size (8 bytes)
foundData = true;
console.log(`Found data chunk at offset ${chunkOffset}, headerSize=${headerSize}, dataSize=${dataSize}`);
}
// Move to next chunk with proper alignment (chunks are word-aligned)
chunkOffset += 8 + ((chunkSize + 1) & ~1);
// If we found both chunks, we're done
if (foundFmt && foundData) break;
}
return null;
// Must have found both fmt and data chunks
if (!foundFmt || !foundData) {
console.warn(`WAV parsing incomplete: foundFmt=${foundFmt}, foundData=${foundData}`);
return null;
}
return {
sampleRate,
channels,
bitsPerSample,
byteRate,
blockAlign,
dataSize,
headerSize
};
}
static createHeader(wavHeader: WavHeader, dataSize: number): Uint8Array {