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AudioPlayer.kt
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AudioPlayer.kt
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/*
* Copyright 2019. Google LLC
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.google.android.apps.santatracker
import android.content.Context
import android.media.MediaPlayer
import android.util.SparseArray
class AudioPlayer(private val context: Context) {
private val streams: SparseArray<MediaPlayer> = SparseArray()
private var muted = false
fun playTrack(resId: Int, loop: Boolean) {
val mediaPlayer = MediaPlayer.create(context, resId)
// Not all devices support audio (i.e. watches)
if (mediaPlayer != null) {
streams.put(resId, mediaPlayer)
mediaPlayer.isLooping = loop
mediaPlayer.setOnPreparedListener { mp -> startMedia(mp) }
mediaPlayer.setOnCompletionListener { mp ->
if (!mp.isLooping) {
mp.release()
streams.remove(resId)
}
}
}
}
fun playTrackExclusive(resId: Int, loop: Boolean) {
var restart = false
val mp = streams.get(resId)
try {
if (mp == null || !mp.isPlaying) {
restart = true
}
} catch (e: IllegalStateException) {
// Media player was not initialised or was released
restart = true
}
if (restart) {
stopAll()
playTrack(resId, loop)
}
}
private fun startMedia(mp: MediaPlayer) {
if (muted) {
mp.setVolume(0f, 0f)
} else {
mp.setVolume(AudioConstants.DEFAULT_BACKGROUND_VOLUME,
AudioConstants.DEFAULT_BACKGROUND_VOLUME)
}
mp.start()
}
fun stop(resId: Int) {
val mp = streams.get(resId)
if (mp != null) {
mp.stop()
mp.release()
streams.remove(resId)
}
}
fun stopAll() {
// Stop all audio
for (i in 0 until streams.size()) {
val mp = streams.valueAt(i)
if (mp != null) {
mp.stop()
mp.release()
streams.removeAt(i)
}
}
}
}