protobuf: add AirMap telemetry protobuf messages

Requires protobuf to be installed on the build system

qgroundcontrol.pro

@@ -587,6 +587,11 @@ HEADERS += \
     src/AnalyzeView/LogDownloadController.h \
     libs/thirdParty/tiny-AES128-C/aes.h \
 
+# Protobuf
+LIBS += -lprotobuf
+PROTOS = src/protobuf/airmap_telemetry.proto
+include(src/protobuf/proto_compile.pri)
+
 AndroidBuild {
 HEADERS += \
 	src/Joystick/JoystickAndroid.h \

src/protobuf/.gitignore

@@ -0,0 +1,2 @@
+
+/airmap_telemetry.pb.*

src/protobuf/airmap_telemetry.proto

@@ -0,0 +1,68 @@
+
+// protoc -I=. --cpp_out=. airmap_telemetry.proto
+
+syntax = "proto2";
+ 
+package airmap.telemetry;
+ 
+message Position {
+     
+    // UNIX time in Milliseconds
+    required uint64 timestamp = 1;
+ 
+    // The recorded latitude
+    // Decimal place requirement: 7 decimal places.
+    required double latitude = 2;
+ 
+    // The recorded longitude
+    // Decimal place requirement: 7 decimal places.
+    required double longitude = 3;
+ 
+    //Altitude above mean sea level (ie. GPS), meters
+    required float altitude_agl = 4;
+ 
+    // Altitude above ground level, meters
+    required float altitude_msl = 5;
+     
+    // Horizontal Dilution of Precision, in meters
+    required float horizontal_accuracy = 6;
+}
+ 
+message Attitude {
+     
+    // UNIX time in Milliseconds
+    required uint64 timestamp = 1;
+ 
+    // Yaw angle measured from True North, { 0 <= x < 360 } degrees
+    required float yaw = 2;
+ 
+    // Pitch angle, { -180 < x <= 180 } degrees
+    required float pitch = 3;
+ 
+    // Roll angle, { -180 < x <= 180 } degrees
+    required float roll = 4;
+}
+ 
+message Speed {
+     
+    // UNIX time in Milliseconds
+    required uint64 timestamp = 1;
+ 
+    // Aircraft Speed in the x direction in meters per second using the North-East-Down (N-E-D) coordinate system
+    required float velocity_x = 2;
+ 
+     // Aircraft Speed in the y direction in meters per second using the North-East-Down (N-E-D) coordinate system
+    required float velocity_y = 3;
+ 
+     // Aircraft Speed in the z direction in meters per second using the North-East-Down (N-E-D) coordinate system
+    required float velocity_z = 4;
+}
+ 
+message Barometer {
+ 
+    // UNIX time in Milliseconds
+    required uint64 timestamp = 1;
+ 
+    // Barometric pressure in hPa
+    required float pressure = 2;
+}

src/protobuf/proto_compile.pri

@@ -0,0 +1,39 @@
+# Qt qmake integration with Google Protocol Buffers compiler protoc
+#
+# To compile protocol buffers with qt qmake, specify PROTOS variable and
+# include this file
+#
+# Example:
+# BITSIZE = $$system(getconf LONG_BIT)
+# if (contains(BITSIZE, 64)) {
+#     LIBS += /usr/lib/x86_64-linux-gnu/libprotobuf.so
+# }
+# if (contains(BITSIZE, 32)) {
+#     LIBS += /usr/lib/libprotobuf.so
+# }
+# PROTOS = a.proto b.proto
+# include(protobuf.pri)
+#
+# By default protoc looks for .proto files (including the imported ones) in
+# the current directory where protoc is run. If you need to include additional
+# paths specify the PROTOPATH variable
+
+message("Generating protocol buffer classes from .proto files.")
+
+INCLUDEPATH += $$PWD
+DEPENDPATH  += $$PWD
+ 
+protobuf_decl.name = protobuf headers
+protobuf_decl.input = PROTOS
+protobuf_decl.output = ${QMAKE_FILE_IN_PATH}/${QMAKE_FILE_BASE}.pb.h
+protobuf_decl.commands = protoc --cpp_out=${QMAKE_FILE_IN_PATH} --proto_path=${QMAKE_FILE_IN_PATH} ${QMAKE_FILE_NAME}
+protobuf_decl.variable_out = HEADERS
+QMAKE_EXTRA_COMPILERS += protobuf_decl
+ 
+protobuf_impl.name = protobuf sources
+protobuf_impl.input = PROTOS
+protobuf_impl.output = ${QMAKE_FILE_IN_PATH}/${QMAKE_FILE_BASE}.pb.cc
+protobuf_impl.depends = ${QMAKE_FILE_IN_PATH}/${QMAKE_FILE_BASE}.pb.h
+protobuf_impl.commands = $$escape_expand(\n)
+protobuf_impl.variable_out = SOURCES
+QMAKE_EXTRA_COMPILERS += protobuf_impl