tencent cloud

// 获取到语音消息的 V2TIMMessage 对象
V2TIMMessage *msg = messageList[0];
if (msg.elemType == V2TIM_ELEM_TYPE_SOUND) {
    // 从 V2TIMMessage 中获取到 soundElem
    V2TIMSoundElem *soundElem = msg.soundElem;
    // 调用语音转文字，默认使用中英文识别模型
    [soundElem convertVoiceToText:@"" completion:^(int code, NSString *desc, NSString *result) {
        // 识别成功，result 为识别结果
        NSLog(@"convertVoiceToText, code: %d, desc: %@, result: %@", code, desc, result);
    }];
}

template <class T>
class ValueCallback final : public V2TIMValueCallback<T> {
public:
    using SuccessCallback = std::function<void(const T&)>;
    using ErrorCallback = std::function<void(int, const V2TIMString&)>;

    ValueCallback() = default;
    ~ValueCallback() override = default;

    void SetCallback(SuccessCallback success_callback, ErrorCallback error_callback) {
        success_callback_ = std::move(success_callback);
        error_callback_ = std::move(error_callback);
    }

    void OnSuccess(const T& value) override {
        if (success_callback_) {
            success_callback_(value);
        }
    }
    void OnError(int error_code, const V2TIMString& error_message) override {
        if (error_callback_) {
            error_callback_(error_code, error_message);
        }
    }

private:
    SuccessCallback success_callback_;
    ErrorCallback error_callback_;
};

auto callback = new ValueCallback<V2TIMString>{};
callback->SetCallback(
    [=](const V2TIMString& result) {
        // 语音转文字成功，result 为转换结果
        delete callback;
    },
    [=](int error_code, const V2TIMString& error_message) {
        // 语音转文字失败
        delete callback;
    });

// 获取到语音消息的 V2TIMMessage 对象
V2TIMMessage *msg = messageList[0];
// 从 V2TIMMessage 中获取到 soundElem
V2TIMElem *elem = message.elemList[0];
if (elem->elemType == V2TIM_ELEM_TYPE_SOUND) {
    V2TIMSoundElem *sound_elem = (V2TIMSoundElem *)elem;
    // 调用语音转文字，默认使用中英文识别模型
    sound_elem->ConvertVoiceToText("", &convertVoiceToTextCallback);
}