Merge branch 'master' of https://gitee.com/lvYeJu/lane-crawford-3

src/utils/audioUtils.ts

@@ -0,0 +1,231 @@
+/**
+ * 音频处理工具函数
+ * 为后续集成第三方TTS方案做准备
+ */
+
+// 音频文件类型定义
+export interface AudioFile {
+  blob: Blob
+  name: string
+  size: number
+  type: string
+  duration?: number
+}
+
+// 音频格式转换选项
+export interface AudioConvertOptions {
+  format: 'webm' | 'mp3' | 'wav' | 'ogg'
+  quality?: number
+  bitrate?: number
+}
+
+/**
+ * 将Blob转换为指定格式的音频文件
+ * @param audioBlob 原始音频Blob
+ * @param options 转换选项
+ * @returns Promise<Blob> 转换后的音频Blob
+ */
+export const convertAudioFormat = async (
+  audioBlob: Blob,
+  options: AudioConvertOptions
+): Promise<Blob> => {
+  return new Promise((resolve, reject) => {
+    try {
+      const audio = new Audio()
+      const url = URL.createObjectURL(audioBlob)
+      
+      audio.onloadedmetadata = () => {
+        // 这里可以添加格式转换逻辑
+        // 目前直接返回原始Blob，实际项目中可以使用Web Audio API或第三方库
+        URL.revokeObjectURL(url)
+        resolve(audioBlob)
+      }
+      
+      audio.onerror = () => {
+        URL.revokeObjectURL(url)
+        reject(new Error('音频加载失败'))
+      }
+      
+      audio.src = url
+    } catch (error) {
+      reject(error)
+    }
+  })
+}
+
+/**
+ * 获取音频文件信息
+ * @param audioBlob 音频Blob
+ * @returns Promise<AudioFile> 音频文件信息
+ */
+export const getAudioFileInfo = async (audioBlob: Blob): Promise<AudioFile> => {
+  return new Promise((resolve, reject) => {
+    const audio = new Audio()
+    const url = URL.createObjectURL(audioBlob)
+    
+    audio.onloadedmetadata = () => {
+      const audioFile: AudioFile = {
+        blob: audioBlob,
+        name: `audio-${Date.now()}.webm`,
+        size: audioBlob.size,
+        type: audioBlob.type,
+        duration: audio.duration
+      }
+      
+      URL.revokeObjectURL(url)
+      resolve(audioFile)
+    }
+    
+    audio.onerror = () => {
+      URL.revokeObjectURL(url)
+      reject(new Error('无法获取音频信息'))
+    }
+    
+    audio.src = url
+  })
+}
+
+/**
+ * 压缩音频文件
+ * @param audioBlob 原始音频Blob
+ * @param quality 压缩质量 (0-1)
+ * @returns Promise<Blob> 压缩后的音频Blob
+ */
+export const compressAudio = async (
+  audioBlob: Blob,
+  quality: number = 0.8
+): Promise<Blob> => {
+  // 这里可以实现音频压缩逻辑
+  // 目前直接返回原始Blob，实际项目中可以使用Web Audio API
+  return audioBlob
+}
+
+/**
+ * 上传音频文件到服务器
+ * @param audioFile 音频文件
+ * @param uploadUrl 上传地址
+ * @returns Promise<string> 服务器返回的文件ID或URL
+ */
+export const uploadAudioFile = async (
+  audioFile: AudioFile,
+  uploadUrl: string
+): Promise<string> => {
+  const formData = new FormData()
+  formData.append('audio', audioFile.blob, audioFile.name)
+  formData.append('duration', audioFile.duration?.toString() || '0')
+  
+  try {
+    const response = await fetch(uploadUrl, {
+      method: 'POST',
+      body: formData
+    })
+    
+    if (!response.ok) {
+      throw new Error(`上传失败: ${response.statusText}`)
+    }
+    
+    const result = await response.json()
+    return result.fileId || result.url
+  } catch (error) {
+    console.error('音频上传失败:', error)
+    throw error
+  }
+}
+
+/**
+ * 为第三方TTS服务准备音频数据
+ * @param audioBlob 音频Blob
+ * @param serviceType TTS服务类型
+ * @returns Promise<any> 准备好的音频数据
+ */
+export const prepareAudioForTTS = async (
+  audioBlob: Blob,
+  serviceType: 'openai' | 'azure' | 'aws' | 'google'
+): Promise<any> => {
+  const audioFile = await getAudioFileInfo(audioBlob)
+  
+  switch (serviceType) {
+    case 'openai':
+      return {
+        file: audioFile.blob,
+        model: 'whisper-1',
+        language: 'zh',
+        response_format: 'json'
+      }
+    
+    case 'azure':
+      return {
+        audio: audioFile.blob,
+        language: 'zh-CN',
+        format: 'json'
+      }
+    
+    case 'aws':
+      return {
+        Audio: audioFile.blob,
+        LanguageCode: 'zh-CN',
+        MediaFormat: 'webm'
+      }
+    
+    case 'google':
+      return {
+        audio: {
+          content: await blobToBase64(audioFile.blob)
+        },
+        config: {
+          encoding: 'WEBM_OPUS',
+          languageCode: 'zh-CN',
+          sampleRateHertz: 16000
+        }
+      }
+    
+    default:
+      throw new Error(`不支持的TTS服务类型: ${serviceType}`)
+  }
+}
+
+/**
+ * 将Blob转换为Base64字符串
+ * @param blob Blob对象
+ * @returns Promise<string> Base64字符串
+ */
+export const blobToBase64 = (blob: Blob): Promise<string> => {
+  return new Promise((resolve, reject) => {
+    const reader = new FileReader()
+    reader.onload = () => resolve(reader.result as string)
+    reader.onerror = reject
+    reader.readAsDataURL(blob)
+  })
+}
+
+/**
+ * 验证音频文件格式
+ * @param blob 音频Blob
+ * @returns boolean 是否为有效的音频格式
+ */
+export const validateAudioFormat = (blob: Blob): boolean => {
+  const validTypes = [
+    'audio/webm',
+    'audio/mp3',
+    'audio/wav',
+    'audio/ogg',
+    'audio/mpeg'
+  ]
+  
+  return validTypes.includes(blob.type)
+}
+
+/**
+ * 获取音频录制权限
+ * @returns Promise<boolean> 是否获得权限
+ */
+export const requestAudioPermission = async (): Promise<boolean> => {
+  try {
+    const stream = await navigator.mediaDevices.getUserMedia({ audio: true })
+    stream.getTracks().forEach(track => track.stop())
+    return true
+  } catch (error) {
+    console.error('获取音频权限失败:', error)
+    return false
+  }
+}