diff --git a/src/hal/plus/ak_common.h b/src/hal/plus/ak_common.h
index 13c0efc..7e72917 100644
--- a/src/hal/plus/ak_common.h
+++ b/src/hal/plus/ak_common.h
@@ -7,4 +7,5 @@
 #include "../symbols.h"
 #include "../types.h"
 
-#define CVI_VI_CHN_NUM 2
\ No newline at end of file
+#define AK_VENC_CHN_NUM 2
+#define AK_VI_CHN_NUM 2
\ No newline at end of file
diff --git a/src/hal/plus/ak_hal.h b/src/hal/plus/ak_hal.h
new file mode 100644
index 0000000..f006eb4
--- /dev/null
+++ b/src/hal/plus/ak_hal.h
@@ -0,0 +1,42 @@
+#pragma once
+
+#include "ak_common.h"
+#include "ak_aud.h"
+#include "ak_venc.h"
+#include "ak_vi.h"
+
+extern char keepRunning;
+
+extern hal_chnstate ak_state[AK_VENC_CHN_NUM];
+extern int (*ak_aud_cb)(hal_audframe*);
+extern int (*ak_vid_cb)(char, hal_vidstream*);
+
+void ak_hal_deinit(void);
+int ak_hal_init(void);
+
+void ak_audio_deinit(void);
+int ak_audio_init(int samplerate);
+void *ak_audio_thread(void);
+
+int ak_channel_bind(char index);
+int ak_channel_grayscale(char enable);
+int ak_channel_unbind(char index);
+
+int ak_config_load(char *path);
+
+int ak_pipeline_create(char mirror, char flip);
+void ak_pipeline_destroy(void);
+
+int ak_region_create(int *handle, hal_rect rect, short opacity);
+void ak_region_destroy(int *handle);
+int ak_region_setbitmap(int *handle, hal_bitmap *bitmap);
+
+int ak_video_create(char index, hal_vidconfig *config);
+int ak_video_destroy(char index);
+int ak_video_destroy_all(void);
+void ak_video_request_idr(char index);
+int ak_video_snapshot_grab(char index, hal_jpegdata *jpeg);
+void *ak_video_thread(void);
+
+void ak_system_deinit(void);
+int ak_system_init(void);
\ No newline at end of file
diff --git a/src/hal/plus/ak_vi.h b/src/hal/plus/ak_vi.h
index 1e98b84..23e9a2c 100644
--- a/src/hal/plus/ak_vi.h
+++ b/src/hal/plus/ak_vi.h
@@ -24,22 +24,27 @@ typedef struct {
 typedef struct {
     void *handle;
 
+    int   (*fnGetSensorResolution)(void *device, ak_vi_res *resolution);
     int   (*fnLoadSensorConfig)(char *path);
 
     int   (*fnDisableDevice)(void *device);
     void* (*fnEnableDevice)(int device);
-    int   (*fnGetDeviceConfig)(void *device, ak_vi_cnf *config);
+    int   (*fnStartDevice)(void *device);
+    int   (*fnStopDevice)(void *device);
+
     int   (*fnSetDeviceConfig)(void *device, ak_vi_cnf *config);
     int   (*fnSetDeviceFlipMirror)(void *device, int flipOn, int mirrorOn);
     int   (*fnSetDeviceMode)(void *device, int nightOn);
-    int   (*fnStartDevice)(void *device);
-    int   (*fnStopDevice)(void *device);
 } ak_vi_impl;
 
 static int ak_vi_load(ak_vi_impl *vi_lib) {
     if (!(vi_lib->handle = dlopen("libplat_vi.so", RTLD_LAZY | RTLD_GLOBAL)))
         HAL_ERROR("ak_vi", "Failed to load library!\nError: %s\n", dlerror());
 
+    if (!(vi_lib->fnGetSensorResolution = (int(*)(void* device, ak_vi_res *resolution))
+        hal_symbol_load("ak_vi", vi_lib->handle, "ak_vi_get_channel_attr")))
+        return EXIT_FAILURE;
+
     if (!(vi_lib->fnLoadSensorConfig = (int(*)(char *path))
         hal_symbol_load("ak_vi", vi_lib->handle, "ak_vi_match_sensor")))
         return EXIT_FAILURE;
@@ -52,8 +57,12 @@ static int ak_vi_load(ak_vi_impl *vi_lib) {
         hal_symbol_load("ak_vi", vi_lib->handle, "ak_vi_open")))
         return EXIT_FAILURE;
 
-    if (!(vi_lib->fnGetDeviceConfig = (int(*)(void* device, ak_vi_cnf *config))
-        hal_symbol_load("ak_vi", vi_lib->handle, "ak_vi_get_channel_attr")))
+    if (!(vi_lib->fnStartDevice = (int(*)(void *device))
+        hal_symbol_load("ak_vi", vi_lib->handle, "ak_vi_capture_on")))
+        return EXIT_FAILURE;
+
+    if (!(vi_lib->fnStopDevice = (int(*)(void *device))
+        hal_symbol_load("ak_vi", vi_lib->handle, "ak_vi_capture_off")))
         return EXIT_FAILURE;
 
     if (!(vi_lib->fnSetDeviceConfig = (int(*)(void* device, ak_vi_cnf *config))
@@ -68,14 +77,6 @@ static int ak_vi_load(ak_vi_impl *vi_lib) {
         hal_symbol_load("ak_vi", vi_lib->handle, "ak_vi_switch_mode")))
         return EXIT_FAILURE;
 
-    if (!(vi_lib->fnStartDevice = (int(*)(void *device))
-        hal_symbol_load("ak_vi", vi_lib->handle, "ak_vi_capture_on")))
-        return EXIT_FAILURE;
-
-    if (!(vi_lib->fnStopDevice = (int(*)(void *device))
-        hal_symbol_load("ak_vi", vi_lib->handle, "ak_vi_capture_off")))
-        return EXIT_FAILURE;
-
     return EXIT_SUCCESS;
 }