Add librespot initial-volume option

spotify/DOCS.md

@@ -35,6 +35,7 @@ Example add-on configuration:
 log_level: info
 name: HomeAssistant
 bitrate: 320
+initial-volume: 50
 username: [email protected]
 password: MySpotifyPassword
 ```
@@ -74,6 +75,10 @@ however, the add-on consumes more data.
 
 Valid values: `96`, `160` (default) or `320`.
 
+### Option: `initial-volume`
+
+Initial volume in % from 0-100. Default for softvol: 50. For the alsa mixer: the current volume.
+
 ### Option: `username`
 
 **IMPORTANT**: _This requires a Spotify Premium account!_

spotify/config.yaml

@@ -15,9 +15,11 @@ init: false
 options:
   name: Home Assistant
   bitrate: 160
+  initial-volume: 50
 schema:
   log_level: list(trace|debug|info|notice|warning|error|fatal)?
   name: str
   bitrate: list(96|160|320)
   username: str?
   password: password?
+  initial-volume: match(^([0-9]|[1-9][0-9]|100)$)?

spotify/rootfs/etc/services.d/spotifyd/run

@@ -8,12 +8,16 @@ declare bitrate
 declare name
 declare password
 declare username
+declare initial-volume
 
 bashio::log.info 'Starting the Spotify daemon...'
 
 # Bitrate
 options+=(--bitrate $(bashio::config 'bitrate'))
 
+# Initial Volume
+options+=(--initial-volume $(bashio::config 'initial-volume'))
+
 # Device name
 name=$(bashio::config 'name')
 options+=(--name "${name}")

spotify/translations/en.yaml

@@ -14,6 +14,12 @@ configuration:
     description: >-
       The bitrate Spotify should use. The higher, the better the sound quality,
       however, the add-on consumes more data.
+  initial-volume:
+    name: Initial Volume
+    description: >-
+      Initial volume in % from 0-100. 
+      Default for softvol: 50. 
+      For the alsa mixer: the current volume.
   username:
     name: Spotify username
     description: >-

spotify/translations/hu.yaml

@@ -14,6 +14,12 @@ configuration:
     description: >-
       A Spotify által használt bitráta beállítása. Minél magasabb, annál jobb
       minőségű, viszont ez nagyobb adatforgalommal jár.
+  initial-volume:
+    name: Initial Volume
+    description: >-
+      Kezdeti térfogat %-ban 0-100 között.
+      A softvol alapértelmezett értéke: 50.
+      Az alsa keverő esetében: az aktuális térfogat.
   username:
     name: Spotify felhasználónév
     description: >-

spotify/translations/it.yaml

@@ -14,6 +14,12 @@ configuration:
     description: >-
       Il bitrate che Spotify dovrebbe usare. Piú é alto, migliore é la qualitá sonora,
       tuttavia, l'add-on consumerá piú banda.
+  initial-volume:
+    name: Initial Volume
+    description: >-
+      Volume iniziale in % da 0 a 100.
+      Impostazione predefinita per softvol: 50.
+      Per il mixer alsa: il volume attuale.
   username:
     name: Spotify username
     description: >-