feat: add doubao audio tts

relay/channel/volcengine/adaptor.go

@@ -37,8 +37,49 @@ func (a *Adaptor) ConvertClaudeRequest(c *gin.Context, info *relaycommon.RelayIn
 }
 
 func (a *Adaptor) ConvertAudioRequest(c *gin.Context, info *relaycommon.RelayInfo, request dto.AudioRequest) (io.Reader, error) {
-	//TODO implement me
-	return nil, errors.New("not implemented")
+	if info.RelayMode != constant.RelayModeAudioSpeech {
+		return nil, errors.New("unsupported audio relay mode")
+	}
+
+	appID, token, err := parseVolcengineAuth(info.ApiKey)
+	if err != nil {
+		return nil, err
+	}
+
+	voiceType := mapVoiceType(request.Voice)
+	speedRatio := mapSpeedRatio(request.Speed)
+	encoding := mapEncoding(request.ResponseFormat)
+
+	c.Set("response_format", encoding)
+
+	volcRequest := VolcengineTTSRequest{
+		App: VolcengineTTSApp{
+			AppID:   appID,
+			Token:   token,
+			Cluster: "volcano_tts",
+		},
+		User: VolcengineTTSUser{
+			UID: "openai_relay_user",
+		},
+		Audio: VolcengineTTSAudio{
+			VoiceType:  voiceType,
+			Encoding:   encoding,
+			SpeedRatio: speedRatio,
+			Rate:       24000,
+		},
+		Request: VolcengineTTSReqInfo{
+			ReqID:     generateRequestID(),
+			Text:      request.Input,
+			Operation: "query",
+		},
+	}
+
+	jsonData, err := json.Marshal(volcRequest)
+	if err != nil {
+		return nil, fmt.Errorf("error marshalling volcengine request: %w", err)
+	}
+
+	return bytes.NewReader(jsonData), nil
 }
 
 func (a *Adaptor) ConvertImageRequest(c *gin.Context, info *relaycommon.RelayInfo, request dto.ImageRequest) (any, error) {
@@ -190,7 +231,6 @@ func (a *Adaptor) Init(info *relaycommon.RelayInfo) {
 }
 
 func (a *Adaptor) GetRequestURL(info *relaycommon.RelayInfo) (string, error) {
-	// 支持自定义域名，如果未设置则使用默认域名
 	baseUrl := info.ChannelBaseUrl
 	if baseUrl == "" {
 		baseUrl = channelconstant.ChannelBaseURLs[channelconstant.ChannelTypeVolcEngine]
@@ -217,6 +257,8 @@ func (a *Adaptor) GetRequestURL(info *relaycommon.RelayInfo) (string, error) {
 			return fmt.Sprintf("%s/api/v3/images/edits", baseUrl), nil
 		case constant.RelayModeRerank:
 			return fmt.Sprintf("%s/api/v3/rerank", baseUrl), nil
+		case constant.RelayModeAudioSpeech:
+			return "https://openspeech.bytedance.com/api/v1/tts", nil
 		default:
 		}
 	}
@@ -225,6 +267,16 @@ func (a *Adaptor) GetRequestURL(info *relaycommon.RelayInfo) (string, error) {
 
 func (a *Adaptor) SetupRequestHeader(c *gin.Context, req *http.Header, info *relaycommon.RelayInfo) error {
 	channel.SetupApiRequestHeader(info, c, req)
+
+	if info.RelayMode == constant.RelayModeAudioSpeech {
+		parts := strings.Split(info.ApiKey, "|")
+		if len(parts) == 2 {
+			req.Set("Authorization", "Bearer;"+parts[1])
+		}
+		req.Set("Content-Type", "application/json")
+		return nil
+	}
+
 	req.Set("Authorization", "Bearer "+info.ApiKey)
 	return nil
 }
@@ -260,6 +312,11 @@ func (a *Adaptor) DoRequest(c *gin.Context, info *relaycommon.RelayInfo, request
 }
 
 func (a *Adaptor) DoResponse(c *gin.Context, resp *http.Response, info *relaycommon.RelayInfo) (usage any, err *types.NewAPIError) {
+	if info.RelayMode == constant.RelayModeAudioSpeech {
+		encoding := mapEncoding(c.GetString("response_format"))
+		return handleTTSResponse(c, resp, encoding)
+	}
+
 	adaptor := openai.Adaptor{}
 	usage, err = adaptor.DoResponse(c, resp, info)
 	return