video_suource

video_suource.kt

// Copyright 2023 Stream.IO, Inc. All Rights Reserved.
// SPDX-License-Identifier: Apache-2.0

// getting front camera
private val videoCapturer: VideoCapturer by lazy { buildCameraCapturer() }

// we need it to initialize video capturer
private val surfaceTextureHelper = SurfaceTextureHelper.create(
  "SurfaceTextureHelperThread",
  peerConnectionFactory.eglBaseContext
)

private val videoSource by lazy {
  peerConnectionFactory.makeVideoSource(videoCapturer.isScreencast).apply {
    videoCapturer.initialize(surfaceTextureHelper, context, this.capturerObserver)
    videoCapturer.startCapture(480, 720, 30)
  }
}

private val localVideoTrack: VideoTrack by lazy {
  peerConnectionFactory.makeVideoTrack(
    source = videoSource,
    trackId = "Video${UUID.randomUUID()}"
  )
}

private fun buildCameraCapturer(): VideoCapturer {
  val manager = cameraManager ?: throw RuntimeException("CameraManager was not initialized!")

  val ids = manager.cameraIdList
  var foundCamera = false
  var cameraId = ""

  for (id in ids) {
    val characteristics = manager.getCameraCharacteristics(id)
    val cameraLensFacing = characteristics.get(CameraCharacteristics.LENS_FACING)

    if (cameraLensFacing == CameraMetadata.LENS_FACING_FRONT) {
      foundCamera = true
      cameraId = id
    }
  }

  if (!foundCamera && ids.isNotEmpty()) {
    cameraId = ids.first()
  }

  val camera2Capturer = Camera2Capturer(context, cameraId, null)
  return camera2Capturer
}