Fixing up Windows build.

src/audio/AudioManager.cpp

@@ -1,11 +1,16 @@
 #include "AudioManager.h"
+
+#ifdef __linux__
 #include "AlsaInterface.h"
+#endif
 
 AudioManager::AudioManager()
     : mAudioDevices(),
       mAudioInterface()
 {
+#ifdef __linux__
     mAudioInterface = AlsaInterface::Create();
+#endif
 }
 
 AudioManager::~AudioManager()
@@ -28,7 +33,7 @@ IAudioInterface* AudioManager::GetAudioInterface()
     return mAudioInterface.get();
 }
 
-unsigned AudioManager::GetNumAudioDevices() const
+std::size_t AudioManager::GetNumAudioDevices() const
 {
     return mAudioDevices.size();
 }

src/audio/AudioManager.h

@@ -19,7 +19,7 @@ public:
 
     void AddAudioDevice(AudioDevicePtr device);
 
-    unsigned GetNumAudioDevices() const;
+    std::size_t GetNumAudioDevices() const;
 
     AudioDevice* GetAudioDevice(unsigned idx) const;
 

src/audio/AudioSynth.cpp

@@ -1,4 +1,6 @@
 #include "AudioSynth.h"
+#define _USE_MATH_DEFINES
+#include <cmath>
 #include <math.h>
 #include <limits>
 #include <iostream>

src/audio/CMakeLists.txt

@@ -1,10 +1,20 @@
 
+set(platform_HEADERS "")
+set(platform_INCLUDES "")
+
+if (UNIX)
 find_package(ALSA REQUIRED)     
-
-list(APPEND linux_HEADERS
+list(APPEND platform_HEADERS
     audio_interfaces/AlsaInterface.h
     ${ALSA_INCLUDE_DIRS}
 )
+list(APPEND platform_INCLUDES
+    audio_interfaces/AlsaInterface.cpp
+)
+list(APPEND platform_LIBS
+    ${ALSA_LIBRARIES}
+)
+endif (UNIX)
 
 list(APPEND audio_HEADERS 
     AudioDevice.h
@@ -20,11 +30,8 @@ list(APPEND audio_HEADERS
     midi/MidiElements.h
     midi/MidiEvent.h
     midi/MetaMidiEvent.h
-    midi/MidiChannelEvent.h)
-
-list(APPEND linux_INCLUDES
-    audio_interfaces/AlsaInterface.cpp
-)
+    midi/MidiChannelEvent.h
+    ${platform_HEADERS})
 
 list(APPEND audio_LIB_INCLUDES 
     AudioDevice.cpp
@@ -41,9 +48,10 @@ list(APPEND audio_LIB_INCLUDES
     midi/MidiDocument.cpp
     midi/MidiEvent.cpp
     midi/MetaMidiEvent.cpp
-    midi/MidiChannelEvent.cpp)
+    midi/MidiChannelEvent.cpp
+    ${platform_INCLUDES})
 
-add_library(audio SHARED ${audio_LIB_INCLUDES} ${linux_INCLUDES} ${audio_HEADERS} ${linux_HEADERS})
+add_library(audio SHARED ${audio_LIB_INCLUDES} ${platform_INCLUDES} ${audio_HEADERS} ${platform_HEADERS})
 target_include_directories(audio PUBLIC
                           "${CMAKE_CURRENT_SOURCE_DIR}"
                           "${PROJECT_SOURCE_DIR}/src/core/file_utilities"
@@ -52,11 +60,7 @@ target_include_directories(audio PUBLIC
                           "${CMAKE_CURRENT_SOURCE_DIR}/midi"
                           "${CMAKE_CURRENT_SOURCE_DIR}/midi/reader"
                           )
-
-list(APPEND linux_LIBS
-    ${ALSA_LIBRARIES}
-)
                           
-target_link_libraries(audio PUBLIC core ${linux_LIBS})
+target_link_libraries(audio PUBLIC core ${platform_LIBS})
 set_target_properties( audio PROPERTIES WINDOWS_EXPORT_ALL_SYMBOLS ON )
 set_property(TARGET audio PROPERTY FOLDER src)