RtAudio: Add RtAudio, a lib for recording audio from an audio input

.gitmodules

 [submodule "src/lib/aubio/aubio.git"]
 	path = src/lib/aubio/aubio.git
 	url = https://github.com/aubio/aubio
+[submodule "src/lib/RtAudio/rtaudio"]
+	path = src/lib/RtAudio/rtaudio
+	url = https://github.com/thestk/rtaudio.git

src/Lichtsteuerung.pro

@@ -276,3 +276,7 @@ win32-msvc{
     LIBS += -L$$PWD/'lib/AudioFFT/dll/AudioFFT.dll'
     INCLUDEPATH += $$PWD/'lib/AudioFFT/include'
 }
+
+    # RTAudio
+    INCLUDEPATH += $$PWD/lib/RtAudio/include
+    LIBS += -L$$PWD/lib/RtAudio/lib -lrtaudio

src/lib/RtAudio/.gitignore

+*/*
\ No newline at end of file

src/lib/RtAudio/build_rtAudio.sh

+#!/bin/bash
+
+# see https://github.com/thestk/rtaudio/blob/master/install.txt
+
+# add and update git submodule
+git submodule init
+git submodule update
+# cd into git repo
+GIT_DIR=rtaudio
+cd $GIT_DIR
+# build
+if [[ "$OSTYPE" == "msys" ]] || ! [[ -z "$GITLAB_CI" ]]; then
+    # we are on windows or on the gitlab ci
+    ./autogen.sh --with-wasapi --host=mingw32
+    FILES_TO_COPY="librtaudio.a"
+elif [[ "$OSTYPE" == "darwin"* ]]; then
+    # macOS
+    ./autogen.sh --with-core
+    FILES_TO_COPY="librtaudio.dylib librtaudio.6.dylib"
+else
+    #linux 
+    ./autogen.sh --with-alsa
+    FILES_TO_COPY="librtaudio.so librtaudio.6.so"
+fi
+make
+cd ..
+
+#copy headers and lib
+mkdir -p lib
+cd $GIT_DIR/.libs/
+cp $FILES_TO_COPY ../../lib
+cd ../../
+mkdir -p include
+cp $GIT_DIR/RtAudio.h include

rtaudio @ 57c2c9d7

+Subproject commit 57c2c9d7598a783a5167422cd744f4d3797141bb

src/lib/build_libs.sh

@@ -20,4 +20,9 @@ cd aubio
 ./build_aubio.sh
 cd ..
 
+echo $'\n\nBuild RtAudio'
+cd RtAudio
+./build_rtAudio.sh
+cd ..
+
 echo "Lib installation complete"