Added functionality to calculate target location.

Added functionality to capture camera frame from RTSP stream.
Refactored code.
Fixed some minor issues.

misc/camera/a8/defines.h

@@ -1,12 +1,43 @@
 #pragma once
 
+enum MESSAGE_IDX { STX = 0, CTRL = 2, Data_len = 3, SEQ = 5, CMD_ID = 7, DATA = 8 };
 
-enum MESSAGE_IDX
-{
-    STX = 0,
-    CTRL = 2,
-    Data_len = 3,
-    SEQ = 5,
-    CMD_ID = 7,
-    DATA = 8
+enum COMMAND_ID {
+    TURN_TO_X = 2, // Set first to 2, because 0 is reserved for EXIT_PROGRAM and 1 for running target location test
+    ZOOM_TO_X,
+    ACQUIRE_CAMERA_CODEC_SPECS,
+    ACQUIRE_CURRENT_ZOOM,
+    ACQUIRE_ATTITUDE_DATA,
+    AUTO_CENTER,
+    ZOOM_MOST,
+    ZOOM_LEAST,
+    FOCUS_MOST,
+    FOCUS_LEAST,
+    FOCUS_AUTO,
+    ROTATE_UP,
+    ROTATE_DOWN,
+    ROTATE_RIGHT,
+    ROTATE_LEFT,
+    ROTATE_STOP,
+    ACQUIRE_MAX_ZOOM_VALUE,
+    TAKE_PICTURES,
+    TAKE_VIDEO,
+    ROTATE_100_100,
+    ACQUIRE_GIMBAL_STATUS,
+    ACQUIRE_HW_INFO,
+    ACQUIRE_FIRMWARE_VERSION,
+    MODE_LOCK,
+    MODE_FOLLOW,
+    MODE_FPV,
+    ENABLE_HDMI,
+    ENABLE_CVBS,
+    DISABLE_HDMI_CVBS,
+    ACQUIRE_RANGE_DATA,
 };
+
+#define CAMERA_FIELD_OF_VIEW_DIAGONAL 93.0
+#define CAMERA_FIELD_OF_VIEW_HORIZONTAL 81.0
+#define CAMERA_RESOLUTION_HEIGHT 1080
+#define CAMERA_RESOLUTION_WIDTH 1920
+#define SERIAL_RESPONSE_WAIT_TIME 500
+#define RTSP_ADDRESS "rtsp://192.168.144.25:8554/main.264"