Fixes base volume in a music Sound not being used when playing it

korau/src/commonMain/kotlin/korlibs/audio/sound/AudioChannel.kt

@@ -5,7 +5,9 @@ import korlibs.time.seconds
 import kotlin.coroutines.CoroutineContext
 import kotlin.coroutines.coroutineContext
 
-class AudioChannel {
+class AudioChannel(
+    val nativeSoundProvider: NativeSoundProvider = korlibs.audio.sound.nativeSoundProvider
+) {
     private var channel: SoundChannel? = null
 
     val state get() = channel?.state ?: SoundChannelState.INITIAL

korau/src/commonMain/kotlin/korlibs/audio/sound/AudioData.kt

@@ -109,8 +109,7 @@ class AudioDataStream(val data: AudioData) : AudioStream(data.rate, data.channel
     override suspend fun clone(): AudioStream = AudioDataStream(data)
 }
 
-
-suspend fun AudioData.toSound(): Sound = nativeSoundProvider.createSound(this)
+suspend fun AudioData.toSound(soundProvider: NativeSoundProvider = nativeSoundProvider): Sound = soundProvider.createSound(this)
 
 suspend fun VfsFile.readAudioData(formats: AudioFormat = defaultAudioFormats, props: AudioDecodingProps = AudioDecodingProps.DEFAULT): AudioData =
     this.openUse { formats.decode(this, props) ?: invalidOp("Can't decode audio file ${this@readAudioData}") }

korau/src/commonMain/kotlin/korlibs/audio/sound/AudioSamples.kt

@@ -1,12 +1,12 @@
 package korlibs.audio.sound
 
-import korlibs.datastructure.iterators.fastForEach
 import korlibs.memory.FastShortTransfer
 import korlibs.memory.arraycopy
 import korlibs.memory.arrayinterleave
 import korlibs.memory.clamp01
 import korlibs.audio.internal.SampleConvert
 import korlibs.audio.internal.coerceToShort
+import korlibs.datastructure.iterators.*
 import korlibs.io.lang.assert
 import kotlin.math.absoluteValue
 import kotlin.math.max
@@ -104,6 +104,7 @@ class AudioSamples(override val channels: Int, override val totalSamples: Int, v
     }
 
     fun scaleVolume(scale: Double): AudioSamples = scaleVolume(scale.toFloat())
+    fun scaleVolume(channelScales: DoubleArray): AudioSamples = scaleVolume(FloatArray(channelScales.size) { channelScales[it].toFloat() })
 
     fun scaleVolume(scale: Float): AudioSamples {
         data.fastForEach { channel ->
@@ -113,6 +114,14 @@ class AudioSamples(override val channels: Int, override val totalSamples: Int, v
         }
         return this
     }
+    fun scaleVolume(channelScales: FloatArray): AudioSamples {
+        data.fastForEachWithIndex { ch, channel ->
+            for (n in channel.indices) {
+                channel[n] = (channel[n] * channelScales[ch]).toInt().coerceToShort()
+            }
+        }
+        return this
+    }
 
     fun setTo(that: AudioSamples): AudioSamples {
         that.copyTo(this)
@@ -125,6 +134,11 @@ class AudioSamples(override val channels: Int, override val totalSamples: Int, v
         }
     }
 
+    fun clone(out: AudioSamples = AudioSamples(channels, totalSamples, Array(data.size) { ShortArray(data[0].size) })) : AudioSamples {
+        this.copyTo(out)
+        return out
+    }
+
     override fun hashCode(): Int = channels + totalSamples * 32 + data.contentDeepHashCode() * 64
     override fun equals(other: Any?): Boolean = (other is AudioSamples) && this.channels == other.channels && this.totalSamples == other.totalSamples && this.data.contentDeepEquals(other.data)
 

korau/src/commonMain/kotlin/korlibs/audio/sound/Sound.kt

@@ -123,9 +123,11 @@ open class LogNativeSoundProvider : NativeSoundProvider() {
     ) : PlatformAudioOutput(coroutineContext, frequency) {
         val data = AudioSamplesDeque(2)
         override suspend fun add(samples: AudioSamples, offset: Int, size: Int) {
-            val addInfo = AddInfo(samples, offset, size)
+            val out = samples.clone()
+            out.scaleVolume(volume)
+            val addInfo = AddInfo(out, offset, size)
             onBeforeAdd(addInfo)
-            data.write(samples, offset, size)
+            data.write(out, offset, size)
             onAfterAdd(addInfo)
         }
         fun consumeToData(): AudioData = data.consumeToData(frequency)

korau/src/commonMain/kotlin/korlibs/audio/sound/SoundAudioStream.kt

@@ -38,7 +38,7 @@ class SoundAudioStream(
     @OptIn(ExperimentalStdlibApi::class)
     override fun play(coroutineContext: CoroutineContext, params: PlaybackParameters): SoundChannel {
         val nas: PlatformAudioOutput = soundProvider.createPlatformAudioOutput(coroutineContext, stream.rate)
-        nas.copySoundPropsFrom(params)
+        nas.copySoundPropsFromCombined(params, this)
         var playing = true
         var paused = false
         var newStream: AudioStream? = null

korau/src/commonTest/kotlin/korlibs.audio.sound/NativeSoundProviderTest.kt

@@ -0,0 +1,31 @@
+package korlibs.audio.sound
+
+import korlibs.io.async.*
+import korlibs.io.file.std.*
+import kotlin.test.*
+
+class NativeSoundProviderTest {
+    class DequeNativeSoundProvider : LogNativeSoundProvider() {
+    }
+
+    @Test
+    fun test() = suspendTest {
+        val values = listOf(null, 1.0, 0.1).map { volume ->
+            val nativeSoundProvider = DequeNativeSoundProvider()
+            val sound = nativeSoundProvider
+                .createSound(resourcesVfs["wav8bit.wav"], streaming = true)
+                .also { if (volume != null) it.volume = volume }
+            sound.playAndWait()
+            val data = nativeSoundProvider.streams.first().data
+            (0 until 10).map { data.read(0).toInt() }
+        }
+        assertEquals(
+            listOf(
+                listOf(0, 1020, 2295, 3315, 4335, 5610, 6630, 7650, 8670, 9690),
+                listOf(0, 1020, 2295, 3315, 4335, 5610, 6630, 7650, 8670, 9690),
+                listOf(0, 102, 229, 331, 433, 561, 663, 765, 867, 969),
+            ),
+            values
+        )
+    }
+}

korge-sandbox/src/commonMain/kotlin/Main.kt

@@ -1,4 +1,5 @@
 
+import korlibs.audio.sound.*
 import korlibs.event.*
 import korlibs.image.color.*
 import korlibs.image.font.*
@@ -73,7 +74,6 @@ suspend fun main() = Korge(
     debug = false,
     forceRenderEveryFrame = false
 ) {
-    //return@Korge
     //sceneContainer().changeTo({MainSprites10k()}); return@start
     //sceneContainer().changeTo({MainGraphicsText()}); return@start
     //sceneContainer().changeTo({MainUI()}); return@start