Filter: standardize inclusion of libaries headers

This commit changes the way libraries headers are included in source files:

 - If the header is in the same directory the source belongs to, so the
 notation '#include ""' is used with the path relative to the directory
 containing the source.

 - If the header is outside the directory containing the source, then we use
 the notation '#include <>' with the path relative to libraries folder.

Some of the advantages of such approach:

 - Only one search path for libraries headers.

 - OSs like Windows may have a better lookup time.

libraries/Filter/Butter.h

@@ -2,7 +2,7 @@
 #ifndef __FILTER_BUTTER_H__
 #define __FILTER_BUTTER_H__
 
-#include <AP_HAL.h>
+#include <AP_HAL/AP_HAL.h>
 
 template <typename Coefficients>
 class Butter2

libraries/Filter/DerivativeFilter.cpp

@@ -19,9 +19,9 @@
 /// See http://www.holoborodko.com/pavel/numerical-methods/numerical-derivative/smooth-low-noise-differentiators/
 //
 #include <inttypes.h>
-#include <AP_Math.h>
-#include <Filter.h>
-#include <DerivativeFilter.h>
+#include <AP_Math/AP_Math.h>
+#include "Filter.h"
+#include "DerivativeFilter.h"
 
 
 template <class T,  uint8_t FILTER_SIZE>

libraries/Filter/LowPassFilter.h

@@ -23,7 +23,7 @@
 #ifndef __LOW_PASS_FILTER_H__
 #define __LOW_PASS_FILTER_H__
 
-#include <AP_Math.h>
+#include <AP_Math/AP_Math.h>
 #include "FilterClass.h"
 
 // DigitalLPF implements the filter math

libraries/Filter/LowPassFilter2p.cpp

@@ -20,7 +20,7 @@
 /// Author: Leonard Hall <LeonardTHall@gmail.com>
 
 #include <inttypes.h>
-#include <AP_Math.h>
+#include <AP_Math/AP_Math.h>
 #include "LowPassFilter2p.h"
 
 float DigitalBiquadFilter::apply(float sample, const struct biquad_params &params)

libraries/Filter/examples/Derivative/Derivative.cpp

@@ -3,15 +3,15 @@
  */
 
 #include <stdlib.h>
-#include <AP_Common.h>
-#include <AP_Progmem.h>
-#include <AP_HAL.h>
-#include <AP_HAL_AVR.h>
-#include <AP_Param.h>
-#include <StorageManager.h>
-#include <AP_Math.h>
-#include <Filter.h>
-#include <DerivativeFilter.h>
+#include <AP_Common/AP_Common.h>
+#include <AP_Progmem/AP_Progmem.h>
+#include <AP_HAL/AP_HAL.h>
+#include <AP_HAL_AVR/AP_HAL_AVR.h>
+#include <AP_Param/AP_Param.h>
+#include <StorageManager/StorageManager.h>
+#include <AP_Math/AP_Math.h>
+#include <Filter/Filter.h>
+#include <Filter/DerivativeFilter.h>
 
 const AP_HAL::HAL& hal = AP_HAL_BOARD_DRIVER;
 

libraries/Filter/examples/Filter/Filter.cpp

@@ -3,18 +3,18 @@
  *       Code by Randy Mackay and Jason Short. DIYDrones.com
  */
 
-#include <AP_Common.h>
-#include <AP_Progmem.h>
-#include <AP_HAL.h>
-#include <AP_HAL_AVR.h>
-#include <AP_HAL_PX4.h>
-#include <AP_HAL_Empty.h>
-#include <AP_Param.h>
-#include <StorageManager.h>
-#include <AP_Math.h>            // ArduPilot Mega Vector/Matrix math Library
-#include <Filter.h>                     // Filter library
-#include <ModeFilter.h>         // ModeFilter class (inherits from Filter class)
-#include <AverageFilter.h>      // AverageFilter class (inherits from Filter class)
+#include <AP_Common/AP_Common.h>
+#include <AP_Progmem/AP_Progmem.h>
+#include <AP_HAL/AP_HAL.h>
+#include <AP_HAL_AVR/AP_HAL_AVR.h>
+#include <AP_HAL_PX4/AP_HAL_PX4.h>
+#include <AP_HAL_Empty/AP_HAL_Empty.h>
+#include <AP_Param/AP_Param.h>
+#include <StorageManager/StorageManager.h>
+#include <AP_Math/AP_Math.h>            // ArduPilot Mega Vector/Matrix math Library
+#include <Filter/Filter.h>                     // Filter library
+#include <Filter/ModeFilter.h>         // ModeFilter class (inherits from Filter class)
+#include <Filter/AverageFilter.h>      // AverageFilter class (inherits from Filter class)
 
 const AP_HAL::HAL& hal = AP_HAL_BOARD_DRIVER;
 

libraries/Filter/examples/LowPassFilter/LowPassFilter.cpp

@@ -3,15 +3,15 @@
  *       Code by Randy Mackay. DIYDrones.com
  */
 
-#include <AP_Common.h>
-#include <AP_Progmem.h>
-#include <AP_HAL.h>
-#include <AP_HAL_AVR.h>
-#include <AP_Param.h>
-#include <StorageManager.h>
-#include <AP_Math.h>            // ArduPilot Mega Vector/Matrix math Library
-#include <Filter.h>                     // Filter library
-#include <LowPassFilter.h>      // LowPassFilter class (inherits from Filter class)
+#include <AP_Common/AP_Common.h>
+#include <AP_Progmem/AP_Progmem.h>
+#include <AP_HAL/AP_HAL.h>
+#include <AP_HAL_AVR/AP_HAL_AVR.h>
+#include <AP_Param/AP_Param.h>
+#include <StorageManager/StorageManager.h>
+#include <AP_Math/AP_Math.h>            // ArduPilot Mega Vector/Matrix math Library
+#include <Filter/Filter.h>                     // Filter library
+#include <Filter/LowPassFilter.h>      // LowPassFilter class (inherits from Filter class)
 
 const AP_HAL::HAL& hal = AP_HAL_BOARD_DRIVER;
 

libraries/Filter/examples/LowPassFilter2p/LowPassFilter2p.cpp

@@ -3,17 +3,17 @@
  *       Code by Randy Mackay and Andrew Tridgell
  */
 
-#include <AP_Common.h>
-#include <AP_Progmem.h>
-#include <AP_HAL.h>
-#include <AP_HAL_AVR.h>
-#include <AP_HAL_PX4.h>
-#include <AP_HAL_FLYMAPLE.h>
-#include <AP_Param.h>
-#include <StorageManager.h>
-#include <AP_Math.h>            // ArduPilot Mega Vector/Matrix math Library
-#include <Filter.h>                     // Filter library
-#include <LowPassFilter2p.h>
+#include <AP_Common/AP_Common.h>
+#include <AP_Progmem/AP_Progmem.h>
+#include <AP_HAL/AP_HAL.h>
+#include <AP_HAL_AVR/AP_HAL_AVR.h>
+#include <AP_HAL_PX4/AP_HAL_PX4.h>
+#include <AP_HAL_FLYMAPLE/AP_HAL_FLYMAPLE.h>
+#include <AP_Param/AP_Param.h>
+#include <StorageManager/StorageManager.h>
+#include <AP_Math/AP_Math.h>            // ArduPilot Mega Vector/Matrix math Library
+#include <Filter/Filter.h>                     // Filter library
+#include <Filter/LowPassFilter2p.h>
 
 const AP_HAL::HAL& hal = AP_HAL_BOARD_DRIVER;