CustomAudioProcessingFactory.kt
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/*
* Copyright 2023-2024 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.webrtc
import io.livekit.android.audio.AudioProcessorInterface
import io.livekit.android.audio.AudioProcessorOptions
import io.livekit.android.audio.AuthedAudioProcessingController
import io.livekit.android.audio.AuthedAudioProcessorInterface
import io.livekit.android.util.flowDelegate
import livekit.org.webrtc.AudioProcessingFactory
import livekit.org.webrtc.ExternalAudioProcessingFactory
import java.nio.ByteBuffer
/**
* @suppress
*/
internal class CustomAudioProcessingFactory() : AuthedAudioProcessingController {
constructor(audioProcessorOptions: AudioProcessorOptions) : this() {
capturePostProcessor = audioProcessorOptions.capturePostProcessor
renderPreProcessor = audioProcessorOptions.renderPreProcessor
bypassCapturePostProcessing = audioProcessorOptions.capturePostBypass
bypassRenderPreProcessing = audioProcessorOptions.renderPreBypass
}
private val externalAudioProcessor = ExternalAudioProcessingFactory()
override var capturePostProcessor: AudioProcessorInterface? by flowDelegate(null) { value, _ ->
externalAudioProcessor.setCapturePostProcessing(
value.toAudioProcessing(),
)
}
override var renderPreProcessor: AudioProcessorInterface? by flowDelegate(null) { value, _ ->
externalAudioProcessor.setRenderPreProcessing(
value.toAudioProcessing(),
)
}
override var bypassCapturePostProcessing: Boolean by flowDelegate(false) { value, _ ->
externalAudioProcessor.setBypassFlagForCapturePost(value)
}
override var bypassRenderPreProcessing: Boolean by flowDelegate(false) { value, _ ->
externalAudioProcessor.setBypassFlagForRenderPre(value)
}
fun getAudioProcessingFactory(): AudioProcessingFactory {
return externalAudioProcessor
}
override fun authenticate(url: String, token: String) {
(capturePostProcessor as? AuthedAudioProcessorInterface)?.authenticate(url, token)
(renderPreProcessor as? AuthedAudioProcessorInterface)?.authenticate(url, token)
}
@Deprecated("Use the capturePostProcessing variable directly instead", ReplaceWith("capturePostProcessor = processing"))
override fun setCapturePostProcessing(processing: AudioProcessorInterface?) {
capturePostProcessor = processing
}
@Deprecated("Use the renderPreProcessing variable directly instead", ReplaceWith("renderPreProcessor = processing"))
override fun setRenderPreProcessing(processing: AudioProcessorInterface?) {
renderPreProcessor = processing
}
@Deprecated("Use the bypassCapturePostProcessing variable directly instead", ReplaceWith("bypassCapturePostProcessing = bypass"))
override fun setBypassForCapturePostProcessing(bypass: Boolean) {
bypassCapturePostProcessing = bypass
}
@Deprecated("Use the bypassRendererPreProcessing variable directly instead", ReplaceWith("bypassRenderPreProcessing = bypass"))
override fun setBypassForRenderPreProcessing(bypass: Boolean) {
bypassRenderPreProcessing = bypass
}
private class AudioProcessingBridge(
var audioProcessing: AudioProcessorInterface? = null,
) : ExternalAudioProcessingFactory.AudioProcessing {
override fun initialize(sampleRateHz: Int, numChannels: Int) {
audioProcessing?.initializeAudioProcessing(sampleRateHz, numChannels)
}
override fun reset(newRate: Int) {
audioProcessing?.resetAudioProcessing(newRate)
}
override fun process(numBands: Int, numFrames: Int, buffer: ByteBuffer?) {
audioProcessing?.processAudio(numBands, numFrames, buffer!!)
}
}
private fun AudioProcessorInterface?.toAudioProcessing(): ExternalAudioProcessingFactory.AudioProcessing {
return AudioProcessingBridge(this)
}
}