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feat: native audio processing apis and various useTrackVolume hooks
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6 changes: 6 additions & 0 deletions
6
android/src/main/java/com/livekit/reactnative/audio/events/Events.kt
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| package com.livekit.reactnative.audio.events | ||
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| enum class Events { | ||
| LK_VOLUME_PROCESSED, | ||
| LK_MULTIBAND_PROCESSED, | ||
| } |
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2
android/src/main/java/com/livekit/reactnative/audio/processing/AudioFormat.kt
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| package com.livekit.reactnative.audio.processing | ||
| data class AudioFormat(val bitsPerSample: Int, val sampleRate: Int, val numberOfChannels: Int) |
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27
android/src/main/java/com/livekit/reactnative/audio/processing/AudioProcessingController.kt
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| package com.livekit.reactnative.audio.processing | ||
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| /** | ||
| * Interface for controlling external audio processing. | ||
| */ | ||
| interface AudioProcessingController { | ||
| /** | ||
| * the audio processor to be used for capture post processing. | ||
| */ | ||
| var capturePostProcessor: AudioProcessorInterface? | ||
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| /** | ||
| * the audio processor to be used for render pre processing. | ||
| */ | ||
| var renderPreProcessor: AudioProcessorInterface? | ||
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| /** | ||
| * whether to bypass mode the render pre processing. | ||
| */ | ||
| var bypassRenderPreProcessing: Boolean | ||
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| /** | ||
| * whether to bypass the capture post processing. | ||
| */ | ||
| var bypassCapturePostProcessing: Boolean | ||
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| } |
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android/src/main/java/com/livekit/reactnative/audio/processing/AudioProcessorInterface.kt
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| package com.livekit.reactnative.audio.processing | ||
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| import java.nio.ByteBuffer | ||
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| /** | ||
| * Interface for external audio processing. | ||
| */ | ||
| interface AudioProcessorInterface { | ||
| /** | ||
| * Check if the audio processing is enabled. | ||
| */ | ||
| fun isEnabled(): Boolean | ||
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| /** | ||
| * Get the name of the audio processing. | ||
| */ | ||
| fun getName(): String | ||
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| /** | ||
| * Initialize the audio processing. | ||
| * | ||
| * Note: audio processing methods will be called regardless of whether | ||
| * [isEnabled] returns true or not. | ||
| */ | ||
| fun initializeAudioProcessing(sampleRateHz: Int, numChannels: Int) | ||
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| /** | ||
| * Called when the sample rate has changed. | ||
| * | ||
| * Note: audio processing methods will be called regardless of whether | ||
| * [isEnabled] returns true or not. | ||
| */ | ||
| fun resetAudioProcessing(newRate: Int) | ||
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| /** | ||
| * Process the audio frame (10ms). | ||
| * | ||
| * Note: audio processing methods will be called regardless of whether | ||
| * [isEnabled] returns true or not. | ||
| */ | ||
| fun processAudio(numBands: Int, numFrames: Int, buffer: ByteBuffer) | ||
| } | ||
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| /** | ||
| * @suppress | ||
| */ | ||
| interface AuthedAudioProcessorInterface : AudioProcessorInterface { | ||
| /** | ||
| * @suppress | ||
| */ | ||
| fun authenticate(url: String, token: String) | ||
| } |
72 changes: 72 additions & 0 deletions
72
...id/src/main/java/com/livekit/reactnative/audio/processing/AudioRecordSamplesDispatcher.kt
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| /* | ||
| * Copyright 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. | ||
| */ | ||
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| package com.livekit.reactnative.audio.processing | ||
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| import android.media.AudioFormat | ||
| import android.os.SystemClock | ||
| import org.webrtc.AudioTrackSink | ||
| import org.webrtc.audio.JavaAudioDeviceModule | ||
| import java.nio.ByteBuffer | ||
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| /** | ||
| * Dispatches recorded audio samples from the local microphone. | ||
| */ | ||
| class AudioRecordSamplesDispatcher : JavaAudioDeviceModule.SamplesReadyCallback { | ||
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| private val sinks = mutableSetOf<AudioTrackSink>() | ||
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| @Synchronized | ||
| fun registerSink(sink: AudioTrackSink) { | ||
| sinks.add(sink) | ||
| } | ||
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| @Synchronized | ||
| fun unregisterSink(sink: AudioTrackSink) { | ||
| sinks.remove(sink) | ||
| } | ||
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| // Reference from Android code, AudioFormat.getBytesPerSample. BitPerSample / 8 | ||
| // Default audio data format is PCM 16 bits per sample. | ||
| // Guaranteed to be supported by all devices | ||
| private fun getBytesPerSample(audioFormat: Int): Int { | ||
| return when (audioFormat) { | ||
| AudioFormat.ENCODING_PCM_8BIT -> 1 | ||
| AudioFormat.ENCODING_PCM_16BIT, AudioFormat.ENCODING_IEC61937, AudioFormat.ENCODING_DEFAULT -> 2 | ||
| AudioFormat.ENCODING_PCM_FLOAT -> 4 | ||
| AudioFormat.ENCODING_INVALID -> throw IllegalArgumentException("Bad audio format $audioFormat") | ||
| else -> throw IllegalArgumentException("Bad audio format $audioFormat") | ||
| } | ||
| } | ||
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| @Synchronized | ||
| override fun onWebRtcAudioRecordSamplesReady(samples: JavaAudioDeviceModule.AudioSamples) { | ||
| val bitsPerSample = getBytesPerSample(samples.audioFormat) * 8 | ||
| val numFrames = samples.sampleRate / 100 // 10ms worth of samples. | ||
| val timestamp = SystemClock.elapsedRealtime() | ||
| for (sink in sinks) { | ||
| val byteBuffer = ByteBuffer.wrap(samples.data) | ||
| sink.onData( | ||
| byteBuffer, | ||
| bitsPerSample, | ||
| samples.sampleRate, | ||
| samples.channelCount, | ||
| numFrames, | ||
| timestamp, | ||
| ) | ||
| } | ||
| } | ||
| } |
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