实现硬件设备控制能力

/**
 * @brief command 事件回调函数类型
 *
 * @details 当 command 模块收到云端对应指令时触发，用于处理指令事件
 *
 * @param event  事件类型，取值为对应指令模块的事件枚举
 * @param req_id 请求 ID 字符串
 * @param params 事件参数，根据事件类型不同指向相对应的参数结构体，没有参数时为 NULL
 * @return int32_t 返回 0 表示处理成功，非 0 表示处理失败
 */
typedef int32_t(*c_mmi_cmd_event_callback)(uint32_t event, char *req_id, void *params);

/**
 * @brief 注册音量指令模块回调（其余模块同理，替换为对应模块名）
 *
 * @param cb 回调函数，用户来实现，用于处理指令事件
 * @return int32_t 返回 0 表示处理成功，非 0 表示处理失败
 */
int32_t c_mmi_cmd_volume_register(c_mmi_cmd_event_callback cb);

#define C_MMI_CMD_VALUE_UNDEFINED       0x7FFFFFFF

//type 音量类型枚举定义
enum {
    C_MM_CMD_TYPE_UNKNOWN = 0,
    C_MM_CMD_TYPE_SYSTEM,
    C_MM_CMD_TYPE_MEDIA,
    C_MM_CMD_TYPE_CALL
};

/*************************** 音量设置组件开始 ***************************/
//event 音量设置相关命令的枚举定义
enum {
    C_MMI_CMD_VOLUME_UNKNOWN = 0,
    C_MMI_CMD_VOLUME_INCREASE,
    C_MMI_CMD_VOLUME_DECREASE,
    C_MMI_CMD_VOLUME_SET,
    C_MMI_CMD_VOLUME_MUTE,
    C_MMI_CMD_VOLUME_UNMUTE
};

//params 音量设置相关命令的参数定义
typedef struct {
    uint32_t value;		// 当值为 C_MMI_CMD_VALUE_UNDEFINED 表示默认值（用户自定义）
    uint32_t type;		// 类型取值为上面的 C_MM_CMD_TYPE_*
} c_mm_volume_param_t;
/*************************** 音量设置组件结束 ***************************/

#include "c_mmi_cmd_volume.h"

static int32_t _cmd_vol_callback(uint32_t event, char *req_id, void *p)
{
    c_mm_volume_param_t *param = (c_mm_volume_param_t *)p;
    (void)req_id;

   // 根据event和指令参数进行处理，具体由用户实现
   // 例如，可以根据 event 类型执行不同的音量操作
    switch (event) {
        case C_MMI_CMD_VOLUME_SET:			// 设置音量
            UTIL_LOG_I("set volume to [%u] for [%u]", param->value, param->type);
            break;
        case C_MMI_CMD_VOLUME_INCREASE:		// 音量增大
            UTIL_LOG_I("increase volume by [%u] for [%u]", param->value, param->type);
            break;
        case C_MMI_CMD_VOLUME_DECREASE:		// 音量减小
            UTIL_LOG_I("decrease volume by [%u] for [%u]", param->value, param->type);
            break;
        case C_MMI_CMD_VOLUME_MUTE:			// 静音
            UTIL_LOG_I("mute");
            break;
        case C_MMI_CMD_VOLUME_UNMUTE:		// 解除静音
            UTIL_LOG_I("unmute");
            break;
        default:
            UTIL_LOG_W("invalid volume command");
            return UTIL_ERR_FAIL;
            break;
    }
    return UTIL_SUCCESS;
}

private void executeCommand(String command) {
        Log.d(TAG, "执行命令: " + command);

        try {
            String cmdName = new JSONArray(command).getJSONObject(0).getString("name");

            switch (cmdName) {
                case "visual_qa":
                    executeVQACommand();
                    break;
                case "quit_videochat":
                    stopVideoMode();
                    break;
                case "set_volume":
                    setVolume(command); //解析音量参数
                    break;
                case "quit":
                    quit();
                    break;
                    // .....
                default:
                    executeDefaultCommand();
                    break;
            }
        } catch (Exception e) {
            Log.e(TAG, "命令执行失败", e);
            isExecutingCommand = false;
        }
    }

//handle command
private func handleCommand(output: [String: Any]?) -> [[String: Any]]?{
    guard let output = output,
              let extraInfo = output["extra_info"] as? [String: Any],
              let commandsString = extraInfo["commands"] as? String,
          let commandsData = commandsString.data(using: .utf8) else {
        return nil
    }

    do {
            // 解析commands字符串为JSON数组
            if let commands = try JSONSerialization.jsonObject(with: commandsData) as? [[String: Any]] {

                for command in commands {
                    let name = command["name"] as? String
                        if name == "visual_qa" {
                            self.executeVQACommand()
                        }else if name == "quit_videochat"{
                            self.quitVideoMode()
                        }else if name == "set_volume"{
                            self.setVolume(command)
                        }else if name == "quit"{
                            self.quit()
                        }
                    //......
                    }
                return commands
            }
            return nil
        } catch {
            print("解析commands时出错: \(error)")
            return nil
        }
    }