fix: use html audio to load stream

src/utils/pcm-to-wav.ts

@@ -0,0 +1,54 @@
+function writeString(view: DataView, offset: number, string: string) {
+  for (let i = 0; i < string.length; i++) {
+    view.setUint8(offset + i, string.charCodeAt(i));
+  }
+}
+
+/**
+ * Convert PCM audio data to WAV format
+ * @param pcmData - Raw PCM audio data as ArrayBuffer
+ * @param sampleRate - Sample rate (default: 24000 Hz, common for TTS)
+ * @param numChannels - Number of channels (default: 1 for mono)
+ * @param bitsPerSample - Bits per sample (default: 16)
+ * @returns WAV format audio as Blob
+ */
+export function pcmToWav(
+  pcmData: ArrayBuffer,
+  sampleRate: number = 24000,
+  numChannels: number = 1,
+  bitsPerSample: number = 16
+): Blob {
+  const pcmBytes = new Uint8Array(pcmData);
+  const dataLength = pcmBytes.length;
+
+  // WAV file header size
+  const headerSize = 44;
+  const wavBuffer = new ArrayBuffer(headerSize + dataLength);
+  const view = new DataView(wavBuffer);
+
+  // Write WAV header
+  // "RIFF" chunk descriptor
+  writeString(view, 0, 'RIFF');
+  view.setUint32(4, 36 + dataLength, true); // File size - 8
+  writeString(view, 8, 'WAVE');
+
+  // "fmt " sub-chunk
+  writeString(view, 12, 'fmt ');
+  view.setUint32(16, 16, true); // Subchunk1Size (16 for PCM)
+  view.setUint16(20, 1, true); // AudioFormat (1 for PCM)
+  view.setUint16(22, numChannels, true); // NumChannels
+  view.setUint32(24, sampleRate, true); // SampleRate
+  view.setUint32(28, sampleRate * numChannels * (bitsPerSample / 8), true); // ByteRate
+  view.setUint16(32, numChannels * (bitsPerSample / 8), true); // BlockAlign
+  view.setUint16(34, bitsPerSample, true); // BitsPerSample
+
+  // "data" sub-chunk
+  writeString(view, 36, 'data');
+  view.setUint32(40, dataLength, true); // Subchunk2Size
+
+  // Write PCM data
+  const wavBytes = new Uint8Array(wavBuffer);
+  wavBytes.set(pcmBytes, headerSize);
+
+  return new Blob([wavBuffer], { type: 'audio/wav' });
+}