Revert "Remove codec2 from Appveyor and Travis builds"

This reverts commit 3d23d4023f.

.appveyor.yml

@@ -87,7 +87,7 @@ for:
             libqt5charts5-dev libqt5texttospeech5-dev libfaad-dev zlib1g-dev \
             libusb-1.0-0-dev libhidapi-dev libboost-all-dev libasound2-dev libopencv-dev libopencv-imgcodecs-dev \
             libxml2-dev bison flex ffmpeg  libpostproc-dev libavcodec-dev libavformat-dev \
-            libopus-dev libairspy-dev libhackrf-dev \
+            libopus-dev libcodec2-dev libairspy-dev libhackrf-dev \
             libbladerf-dev libsoapysdr-dev libiio-dev libuhd-dev \
             python3-mako python3-cheetah python3-numpy \
             autoconf automake libtool ninja-build libclang1-11

.travis.yml

@@ -70,6 +70,8 @@ install:
   # macOS 10.11 doesn't support newest Qt
   - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then if [[ "$TRAVIS_OSX_IMAGE" == "xcode7.3" ]]; then sudo port -N -k install qt59-qtmultimedia qt59-qttools; else sudo port -N -k install qt5-qtmultimedia qt5-qttools; fi; fi
   - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then source macports-ci ccache --save; fi
+  # use codec2 from repository
+  #- if [[ "$TRAVIS_OS_NAME" == "linux" ]] && [[ ! "${CMAKE_CUSTOM_OPTIONS}" =~ "ENABLE_EXTERNAL_LIBRARIES=ON" ]]; then bash cmake/ci/build_codec2.sh; fi
   - if [[ "$TRAVIS_OS_NAME" == "linux" ]] && [[ ! "${CMAKE_CUSTOM_OPTIONS}" =~ "ENABLE_EXTERNAL_LIBRARIES=ON" ]]; then bash cmake/ci/build_cm256cc.sh; fi
   - if [[ "$TRAVIS_OS_NAME" == "linux" ]] && [[ ! "${CMAKE_CUSTOM_OPTIONS}" =~ "ENABLE_EXTERNAL_LIBRARIES=ON" ]]; then bash cmake/ci/build_mbelib.sh; fi
   - if [[ "$TRAVIS_OS_NAME" == "linux" ]] && [[ ! "${CMAKE_CUSTOM_OPTIONS}" =~ "ENABLE_EXTERNAL_LIBRARIES=ON" ]]; then bash cmake/ci/build_serialdv.sh; fi

cmake/ci/build_codec2.sh

@@ -0,0 +1,16 @@
+#!/bin/sh
+
+sudo apt-get -y install libsamplerate0-dev libspeex-dev libspeexdsp-dev
+
+cd $HOME
+mkdir -p external && cd external
+mkdir -p drowe67 && cd drowe67
+
+git clone https://github.com/drowe67/codec2.git
+
+cd codec2
+git reset --hard "v1.0.3"
+mkdir -p build && cd build
+cmake ..
+sudo make install
+sudo ldconfig