Fix usage of ALSA softvol plugin

Somewhere in the version 3.x the softvol plugin got broken as the volume
change is not applied anymore. Turned out for the softvol plugin no
`volume()` and `parameters()` are defined.

diff --git a/audio_alsa.c b/audio_alsa.c
index 3288b85d7bd29a9bf5fb6b0f4571039c14ef8d5c..2963257687f89c977db79af1b87920c4e8e803c2 100644 (file)
--- a/audio_alsa.c
+++ b/audio_alsa.c
@@ -395,6 +395,8 @@ static int init(int argc, char **argv) {
           debug(1, "Volume control \"%s\" has dB volume from %f to %f.", alsa_mix_ctrl,
                 (1.0 * alsa_mix_mindb) / 100.0, (1.0 * alsa_mix_maxdb) / 100.0);
           has_softvol = 1;
+          audio_alsa.volume = &volume; // insert the volume function now we know it can do dB stuff
+          audio_alsa.parameters = &parameters; // likewise the parameters stuff
         } else {
           debug(1, "Cannot get the dB range from the volume control \"%s\"", alsa_mix_ctrl);
         }