VideoRenderer.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.compose
import androidx.compose.runtime.*
import androidx.compose.ui.Modifier
import androidx.compose.ui.layout.onGloballyPositioned
import androidx.compose.ui.viewinterop.AndroidView
import io.livekit.android.renderer.TextureViewRenderer
import io.livekit.android.room.Room
import io.livekit.android.room.track.RemoteVideoTrack
import io.livekit.android.room.track.VideoTrack
import io.livekit.android.room.track.video.ComposeVisibility
/**
* Widget for displaying a VideoTrack. Handles the Compose <-> AndroidView interop needed to use
* [TextureViewRenderer].
*/
@Composable
fun VideoRenderer(
room: Room,
videoTrack: VideoTrack,
modifier: Modifier = Modifier,
mirror: Boolean = false,
) {
val videoSinkVisibility = remember(room, videoTrack) { ComposeVisibility() }
var boundVideoTrack by remember { mutableStateOf<VideoTrack?>(null) }
var view: TextureViewRenderer? by remember { mutableStateOf(null) }
fun cleanupVideoTrack() {
view?.let { boundVideoTrack?.removeRenderer(it) }
boundVideoTrack = null
}
fun setupVideoIfNeeded(videoTrack: VideoTrack, view: TextureViewRenderer) {
if (boundVideoTrack == videoTrack) {
return
}
cleanupVideoTrack()
boundVideoTrack = videoTrack
if (videoTrack is RemoteVideoTrack) {
videoTrack.addRenderer(view, videoSinkVisibility)
} else {
videoTrack.addRenderer(view)
}
}
DisposableEffect(view, mirror) {
view?.setMirror(mirror)
onDispose { }
}
DisposableEffect(room, videoTrack) {
onDispose {
videoSinkVisibility.onDispose()
cleanupVideoTrack()
}
}
DisposableEffect(currentCompositeKeyHash.toString()) {
onDispose {
view?.release()
}
}
AndroidView(
factory = { context ->
TextureViewRenderer(context).apply {
room.initVideoRenderer(this)
setupVideoIfNeeded(videoTrack, this)
view = this
}
},
update = { v -> setupVideoIfNeeded(videoTrack, v) },
modifier = modifier
.onGloballyPositioned { videoSinkVisibility.onGloballyPositioned(it) },
)
}