fix: WeChat login Content-Type header, ASR tiny model, re-upload mini-program v1.0.11

backend/src/modules/tts/tts.service.ts

@@ -10,6 +10,7 @@ interface TtsResult {
   hash: string
   filePath: string
   durationMs: number
+  amplitudeData: number[]
 }
 
 const VALID_VOICES = new Set([
@@ -41,7 +42,10 @@ export class TtsService {
 
     if (fs.existsSync(filePath)) {
       const durationMs = await this.getDuration(filePath)
-      return { hash, filePath, durationMs }
+      const amplitudeData = this.loadAmplitudeData(hash)
+      if (amplitudeData) {
+        return { hash, filePath, durationMs, amplitudeData }
+      }
     }
 
     try {
@@ -50,8 +54,9 @@ export class TtsService {
         { timeout: 30000 },
       )
       const durationMs = await this.getDuration(filePath)
+      const amplitudeData = this.extractAmplitude(filePath, hash)
       this.logger.log(`TTS generated: hash=${hash} text="${text.slice(0, 40)}..." duration=${durationMs}ms`)
-      return { hash, filePath, durationMs }
+      return { hash, filePath, durationMs, amplitudeData }
     } catch (e) {
       this.logger.error(`TTS failed: ${e.message}`)
       throw e
@@ -63,6 +68,46 @@ export class TtsService {
     return fs.existsSync(filePath) ? filePath : null
   }
 
+  private extractAmplitude(mp3Path: string, hash: string): number[] {
+    try {
+      const pcmPath = `/tmp/tts-cache/${hash}.pcm`
+      execSync(
+        `ffmpeg -y -i "${mp3Path}" -f s16le -acodec pcm_s16le -ar 16000 -ac 1 "${pcmPath}" 2>/dev/null`,
+        { timeout: 10000 },
+      )
+      const pcmBuf = fs.readFileSync(pcmPath)
+      const samples = new Int16Array(pcmBuf.buffer, pcmBuf.byteOffset, pcmBuf.byteLength / 2)
+      const chunkSize = Math.floor(16000 * 0.05) // 50ms
+      const amplitudes: number[] = []
+      for (let i = 0; i < samples.length; i += chunkSize) {
+        const end = Math.min(i + chunkSize, samples.length)
+        let sumSq = 0
+        for (let j = i; j < end; j++) {
+          sumSq += samples[j] * samples[j]
+        }
+        const rms = Math.sqrt(sumSq / (end - i))
+        amplitudes.push(Number((Math.min(1, rms / 16000)).toFixed(4)))
+      }
+      try { fs.unlinkSync(pcmPath) } catch {}
+      const ampPath = `/tmp/tts-cache/${hash}.amp`
+      fs.writeFileSync(ampPath, JSON.stringify(amplitudes))
+      return amplitudes
+    } catch (e) {
+      this.logger.warn(`振幅提取失败: ${e.message}`)
+      return []
+    }
+  }
+
+  private loadAmplitudeData(hash: string): number[] | null {
+    try {
+      const ampPath = `/tmp/tts-cache/${hash}.amp`
+      if (!fs.existsSync(ampPath)) return null
+      return JSON.parse(fs.readFileSync(ampPath, 'utf8'))
+    } catch {
+      return null
+    }
+  }
+
   private escapeText(text: string): string {
     return text.replace(/"/g, '\\"').replace(/\n/g, ' ').replace(/\r/g, '')
   }