feat: Add camera functions (lichuang-dev)

main/boards/common/esp32_camera.h

@@ -0,0 +1,38 @@
+#ifndef ESP32_CAMERA_H
+#define ESP32_CAMERA_H
+
+#include <esp_camera.h>
+#include <lvgl.h>
+#include <thread>
+#include <memory>
+
+#include <freertos/FreeRTOS.h>
+#include <freertos/queue.h>
+
+#include "camera.h"
+
+struct JpegChunk {
+    uint8_t* data;
+    size_t len;
+};
+
+class Esp32Camera : public Camera {
+private:
+    camera_fb_t* fb_ = nullptr;
+    lv_img_dsc_t preview_image_;
+    std::string explain_url_;
+    std::string explain_token_;
+    std::thread preview_thread_;
+    std::thread encoder_thread_;
+
+    QueueHandle_t jpeg_queue_ = nullptr;
+public:
+    Esp32Camera(const camera_config_t& config);
+    ~Esp32Camera();
+
+    virtual void SetExplainUrl(const std::string& url, const std::string& token);
+    virtual bool Capture();
+    virtual std::string Explain(const std::string& question);
+};
+
+#endif // ESP32_CAMERA_H