Hello, Xiaozhi.

main/Application.h

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+#ifndef _APPLICATION_H_
+#define _APPLICATION_H_
+
+#include "WifiStation.h"
+#include "AudioDevice.h"
+#include "OpusEncoder.h"
+#include "WebSocketClient.h"
+#include "BuiltinLed.h"
+
+#include "opus.h"
+#include "resampler_structs.h"
+#include "freertos/event_groups.h"
+#include "freertos/queue.h"
+#include "freertos/task.h"
+#include "esp_afe_sr_models.h"
+#include "esp_nsn_models.h"
+#include <mutex>
+
+#define DETECTION_RUNNING 1
+#define COMMUNICATION_RUNNING 2
+
+struct AudioEncoderData {
+    const void* data;
+    size_t size;
+};
+
+enum ChatState {
+    kChatStateIdle,
+    kChatStateConnecting,
+    kChatStateListening,
+    kChatStateSpeaking,
+};
+
+class Application {
+public:
+    Application();
+    ~Application();
+    void Start();
+
+private:
+    WifiStation wifi_station_;
+    AudioDevice audio_device_;
+    BuiltinLed builtin_led_;
+
+    std::recursive_mutex mutex_;
+    WebSocketClient* ws_client_ = nullptr;
+    esp_afe_sr_data_t* afe_detection_data_ = nullptr;
+    esp_afe_sr_data_t* afe_communication_data_ = nullptr;
+    EventGroupHandle_t event_group_;
+    char* wakenet_model_ = NULL;
+    char* nsnet_model_ = NULL;
+    volatile ChatState chat_state_ = kChatStateIdle;
+
+    // Audio encode / decode
+    TaskHandle_t audio_feed_task_ = nullptr;
+    StaticTask_t audio_encode_task_buffer_;
+    StackType_t* audio_encode_task_stack_ = nullptr;
+    QueueHandle_t audio_encode_queue_ = nullptr;
+
+    TaskHandle_t audio_decode_task_ = nullptr;
+    StaticTask_t audio_decode_task_buffer_;
+    StackType_t* audio_decode_task_stack_ = nullptr;
+    QueueHandle_t audio_decode_queue_ = nullptr;
+
+    OpusEncoder opus_encoder_;
+    OpusDecoder* opus_decoder_ = nullptr;
+
+    int opus_duration_ms_ = 60;
+    silk_resampler_state_struct resampler_state_;
+
+    void SetChatState(ChatState state);
+    void StartDetection();
+    void StartCommunication();
+    void StartWebSocketClient();
+
+    void AudioFeedTask();
+    void AudioDetectionTask();
+    void AudioCommunicationTask();
+    void AudioEncodeTask();
+    void AudioDecodeTask();
+};
+
+#endif // _APPLICATION_H_