detail: add replaygain values to song properties

This should allow for clearer debugging.

app/src/main/java/org/oxycblt/auxio/detail/SongDetailDialog.kt

@@ -38,6 +38,7 @@ import org.oxycblt.auxio.music.info.Name
 import org.oxycblt.auxio.music.metadata.AudioProperties
 import org.oxycblt.auxio.music.resolveNames
 import org.oxycblt.auxio.playback.formatDurationMs
+import org.oxycblt.auxio.playback.replaygain.formatDb
 import org.oxycblt.auxio.ui.ViewBindingMaterialDialogFragment
 import org.oxycblt.auxio.util.collectImmediately
 import org.oxycblt.auxio.util.concatLocalized
@@ -118,6 +119,12 @@ class SongDetailDialog : ViewBindingMaterialDialogFragment<DialogSongDetailBindi
                             SongProperty(
                                 R.string.lbl_sample_rate, getString(R.string.fmt_sample_rate, it)))
                     }
+                    song.replayGainAdjustment.track?.let {
+                        add(SongProperty(R.string.lbl_replaygain_track, it.formatDb(context)))
+                    }
+                    song.replayGainAdjustment.album?.let {
+                        add(SongProperty(R.string.lbl_replaygain_album, it.formatDb(context)))
+                    }
                 },
                 UpdateInstructions.Replace(0))
         }

app/src/main/java/org/oxycblt/auxio/playback/replaygain/PreAmpCustomizeDialog.kt

@@ -24,7 +24,6 @@ import android.widget.TextView
 import androidx.appcompat.app.AlertDialog
 import dagger.hilt.android.AndroidEntryPoint
 import javax.inject.Inject
-import kotlin.math.abs
 import org.oxycblt.auxio.R
 import org.oxycblt.auxio.databinding.DialogPreAmpBinding
 import org.oxycblt.auxio.playback.PlaybackSettings
@@ -85,11 +84,6 @@ class PreAmpCustomizeDialog : ViewBindingMaterialDialogFragment<DialogPreAmpBind
         // It is more clear to prepend a +/- before the pre-amp value to make it easier to
         // gauge how much it may be increasing the volume, however android does not add +
         // to positive float values when formatting them in a string. Instead, add it ourselves.
-        ticker.text =
-            if (valueDb >= 0) {
-                getString(R.string.fmt_db_pos, valueDb)
-            } else {
-                getString(R.string.fmt_db_neg, abs(valueDb))
-            }
+        ticker.text = valueDb.formatDb(requireContext())
     }
 }

app/src/main/java/org/oxycblt/auxio/playback/replaygain/ReplayGain.kt

@@ -18,7 +18,10 @@
  
 package org.oxycblt.auxio.playback.replaygain
 
+import android.content.Context
+import kotlin.math.abs
 import org.oxycblt.auxio.IntegerTable
+import org.oxycblt.auxio.R
 
 /**
  * The current ReplayGain configuration.
@@ -67,3 +70,16 @@ data class ReplayGainAdjustment(val track: Float?, val album: Float?)
  * @author Alexander Capehart (OxygenCobalt)
  */
 data class ReplayGainPreAmp(val with: Float, val without: Float)
+
+/**
+ * Format a decibel value in a human-readable format.
+ *
+ * @param context The context to resolve resources from.
+ * @return A formatted decibel value. Will be prefixed by a + or - sign.
+ */
+fun Float.formatDb(context: Context) =
+    if (this >= 0) {
+        context.getString(R.string.fmt_db_pos, this)
+    } else {
+        context.getString(R.string.fmt_db_neg, abs(this))
+    }

app/src/main/res/values/strings.xml

@@ -146,6 +146,8 @@
     <string name="lbl_size">Size</string>
     <string name="lbl_bitrate">Bit rate</string>
     <string name="lbl_sample_rate">Sample rate</string>
+    <string name="lbl_replaygain_track">ReplayGain Track Adjustment</string>
+    <string name="lbl_replaygain_album">ReplayGain Album Adjustment</string>
 
     <!-- Limit to 10 characters -->
     <string name="lbl_shuffle_shortcut_short">Shuffle</string>