LocalAudioTrack.kt
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/*
* Copyright 2023 LiveKit, Inc.
*
* 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
*
* http://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 io.livekit.android.room.track
import android.Manifest
import android.content.Context
import android.content.pm.PackageManager
import androidx.core.content.ContextCompat
import org.webrtc.MediaConstraints
import org.webrtc.PeerConnectionFactory
import org.webrtc.RtpSender
import org.webrtc.RtpTransceiver
import java.util.*
/**
* Represents a local audio track (generally using the microphone as input).
*
* This class should not be constructed directly, but rather through [LocalParticipant]
*/
class LocalAudioTrack(
name: String,
mediaTrack: org.webrtc.AudioTrack
) : AudioTrack(name, mediaTrack) {
var enabled: Boolean
get() = rtcTrack.enabled()
set(value) {
rtcTrack.setEnabled(value)
}
internal var transceiver: RtpTransceiver? = null
internal val sender: RtpSender?
get() = transceiver?.sender
companion object {
internal fun createTrack(
context: Context,
factory: PeerConnectionFactory,
options: LocalAudioTrackOptions = LocalAudioTrackOptions(),
name: String = ""
): LocalAudioTrack {
if (ContextCompat.checkSelfPermission(context, Manifest.permission.RECORD_AUDIO) !=
PackageManager.PERMISSION_GRANTED
) {
throw SecurityException("Record audio permissions are required to create an audio track.")
}
val audioConstraints = MediaConstraints()
val items = listOf(
MediaConstraints.KeyValuePair("googEchoCancellation", options.echoCancellation.toString()),
MediaConstraints.KeyValuePair("googAutoGainControl", options.autoGainControl.toString()),
MediaConstraints.KeyValuePair("googHighpassFilter", options.highPassFilter.toString()),
MediaConstraints.KeyValuePair("googNoiseSuppression", options.noiseSuppression.toString()),
MediaConstraints.KeyValuePair("googTypingNoiseDetection", options.typingNoiseDetection.toString()),
)
audioConstraints.optional.addAll(items)
val audioSource = factory.createAudioSource(audioConstraints)
val rtcAudioTrack =
factory.createAudioTrack(UUID.randomUUID().toString(), audioSource)
return LocalAudioTrack(name = name, mediaTrack = rtcAudioTrack)
}
}
}