Allow for alternate backends, such as pipe. Fixes dtcooper#83

Author: dtcooper

README.md

@@ -123,6 +123,10 @@ which passes arguments to [librespot](https://github.com/librespot-org/librespot
 # By default, the volume normalization is enabled, add alternative volume
 # arguments here if you'd like, but these should be fine.
 #VOLUME_ARGS="--enable-volume-normalisation --linear-volume --initial-volume=100"
+
+# Backend could be set to pipe here, but it's for very advanced use cases of
+# librespot, so you shouldn't need to change this under normal circumstances.
+#BACKEND_ARGS="--backend alsa"
 ```
 
 After editing restart the daemon by running: `sudo systemctl restart raspotify`

raspotify/etc/default/raspotify

@@ -28,3 +28,7 @@
 # By default, the volume normalization is enabled, add alternative volume
 # arguments here if you'd like, but these should be fine.
 #VOLUME_ARGS="--enable-volume-normalisation --linear-volume --initial-volume=100"
+
+# Backend could be set to pipe here, but it's for very advanced use cases of
+# librespot, so you shouldn't need to change this under normal circumstances.
+#BACKEND_ARGS="--backend alsa"

raspotify/lib/systemd/system/raspotify.service

@@ -13,8 +13,9 @@ Environment="DEVICE_NAME=raspotify (%H)"
 Environment="BITRATE=160"
 Environment="CACHE_ARGS=--disable-audio-cache"
 Environment="VOLUME_ARGS=--enable-volume-normalisation --linear-volume --initial-volume=100"
+Environment="BACKEND_ARGS=--backend alsa"
 EnvironmentFile=-/etc/default/raspotify
-ExecStart=/usr/bin/librespot --name ${DEVICE_NAME} --backend alsa --bitrate ${BITRATE} $CACHE_ARGS $VOLUME_ARGS $OPTIONS
+ExecStart=/usr/bin/librespot --name ${DEVICE_NAME} $BACKEND_ARGS --bitrate ${BITRATE} $CACHE_ARGS $VOLUME_ARGS $OPTIONS
 
 [Install]
 WantedBy=multi-user.target