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Never report audio progress beyond duration #531

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merged 2 commits into from
Jun 10, 2024
Merged

Never report audio progress beyond duration #531

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e63f4d3
Never report audio progress beyond duration
qnga Jun 10, 2024
e035567
Fix other values
qnga Jun 10, 2024
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28 changes: 23 additions & 5 deletions .../navigators/media/audio/src/main/java/org/readium/navigator/media/audio/AudioNavigator.kt
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Original file line number Diff line number Diff line change
Expand Up @@ -91,36 +91,47 @@ public class AudioNavigator<S : Configurable.Settings, P : Configurable.Preferen
.mapNotNull { it.duration }
.takeIf { it.size == readingOrder.items.size }
?.sum()

val coercedOffset =
playback.coerceOffset(currentItem.duration)

val totalProgression =
if (itemStartPosition == null) {
null
} else {
readingOrder.duration?.let { (itemStartPosition + playback.offset) / it }
readingOrder.duration?.let { (itemStartPosition + coercedOffset) / it }
}

val locator = requireNotNull(publication.locatorFromLink(link))
locator.copyWithLocations(
fragments = listOf("t=${playback.offset.inWholeSeconds}"),
progression = item.duration?.let { playback.offset / it },
fragments = listOf("t=${coercedOffset.inWholeSeconds}"),
progression = item.duration?.let { coercedOffset / it },
totalProgression = totalProgression
)
}

override val playback: StateFlow<Playback> =
audioEngine.playback.mapStateIn(coroutineScope) { playback ->
val itemDuration =
readingOrder.items[playback.index].duration

val coercedOffset =
playback.coerceOffset(itemDuration)

Playback(
playback.state.toState(),
playback.playWhenReady,
playback.index,
playback.offset,
coercedOffset,
playback.buffered
)
}

override val location: StateFlow<Location> =
audioEngine.playback.mapStateIn(coroutineScope) {
val currentItem = readingOrder.items[it.index]
Location(currentItem.href, it.offset)
val coercedOffset = it.coerceOffset(currentItem.duration)
Location(currentItem.href, coercedOffset)
}

override fun play() {
Expand Down Expand Up @@ -178,4 +189,11 @@ public class AudioNavigator<S : Configurable.Settings, P : Configurable.Preferen
is AudioEngine.State.Buffering -> State.Buffering
is AudioEngine.State.Failure -> State.Failure(error)
}

private fun AudioEngine.Playback.coerceOffset(duration: Duration?): Duration =
if (duration == null) {
offset
} else {
offset.coerceAtMost(duration)
}
}
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