djiparsetxt
parseRecord_RC.cpp
Go to the documentation of this file.
1 /**********
2 This program is free software: you can redistribute it and/or modify
3 it under the terms of the GNU General Public License as published by
4 the Free Software Foundation, either version 3 of the License, or
5 (at your option) any later version.
6 
7 This program is distributed in the hope that it will be useful,
8 but WITHOUT ANY WARRANTY; without even the implied warranty of
9 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
10 GNU General Public License for more details.
11 
12 You should have received a copy of the GNU General Public License
13 along with this program. If not, see <http://www.gnu.org/licenses/>.
14 **********/
15 /*
16  A C++ program to parse DJI's ".txt" log files (recorded by the "DJI Go 4" app).
17  Version 2019-02-08
18 
19  Copyright (c) 2019 Live Networks, Inc. All rights reserved.
20  For the latest version of this program (and more information), visit http://djilogs.live555.com
21 
22  Parsing RC records within DJI ".txt" files.
23  Implementation.
24 */
25 
27 
28 void RecordAndDetailsParser::parseRecord_RC(u_int8_t const*& ptr, u_int8_t const* limit) {
29  // RC.aileron: 2 bytes little-endian, signed: subtract 1024, and divide by 0.066(?):
30  noteSigned2ByteField("RC.aileron", ptr, limit, 0.066, 1024);
31 
32  // RC.elevator: 2 bytes little-endian, signed: subtract 1024, and divide by 0.066(?):
33  noteSigned2ByteField("RC.elevator", ptr, limit, 0.066, 1024);
34 
35  // RC.throttle: 2 bytes little-endian, signed: subtract 1024, and divide by 0.066(?):
36  noteSigned2ByteField("RC.throttle", ptr, limit, 0.066, 1024);
37 
38  // RC.rudder: 2 bytes little-endian, signed: subtract 1024, and divide by 0.066(?):
39  noteSigned2ByteField("RC.rudder", ptr, limit, 0.066, 1024);
40 
41  // RC.gimbal: 2 bytes little-endian, signed: subtract 1024, and divide by 0.066(?):
42  noteSigned2ByteField("RC.gimbal", ptr, limit, 0.066, 1024);
43 
44  // unknown(2 bits) + RC.wheelOffset(5 bits) + unknown(1 bit):
45  u_int8_t byte = getByte(ptr, limit);
46  enterSubByteField("RC.wheelOffset", byte, 0x3E);
47 
48  // unknown(2 bits) + RC.mode(2 bits) + RC.goHome(1 bit) + unknown(3 bits):
49  byte = getByte(ptr, limit);
50  enterSubByteField("RC.mode", byte, 0x30);
51  enterSubByteField("RC.goHome", byte, 0x08);
52 
53  // 8 bits (Boolean flags); from high to low:
54  // RC.record
55  // RC.shutter
56  // RC.playback
57  // RC.custom1
58  // RC.custom2
59  // unknown(3 bits)
60  byte = getByte(ptr, limit);
61  enterSubByteField("RC.record", byte, 0x80);
62  enterSubByteField("RC.shutter", byte, 0x40);
63  enterSubByteField("RC.playback", byte, 0x20);
64  enterSubByteField("RC.custom1", byte, 0x10);
65  enterSubByteField("RC.custom2", byte, 0x08);
66 }
u_int8_t getByte(u_int8_t const *&ptr, u_int8_t const *limit)
void noteSigned2ByteField(char const *label, u_int8_t const *&ptr, u_int8_t const *limit, float divisor=0.0, int16_t offset=0)
void enterSubByteField(char const *label, u_int8_t byte, u_int8_t mask)
void parseRecord_RC(u_int8_t const *&ptr, u_int8_t const *limit)