Enable Preview Stabilization if devices support for JCA

camera-viewfinder-compose/build.gradle.kts

@@ -77,7 +77,7 @@ dependencies {
  androidTestImplementation("androidx.test.espresso:espresso-core:3.4.0")
 
  // CameraX
- val camerax_version = "1.3.0-SNAPSHOT"
+ val camerax_version = "1.4.0-SNAPSHOT"
  implementation("androidx.camera:camera-core:${camerax_version}")
  implementation("androidx.camera:camera-view:${camerax_version}")
 

domain/camera/build.gradle.kts

@@ -61,7 +61,7 @@ dependencies {
  implementation("androidx.concurrent:concurrent-futures-ktx:1.1.0")
 
  // CameraX
- val camerax_version = "1.3.0-SNAPSHOT"
+ val camerax_version = "1.4.0-SNAPSHOT"
  implementation("androidx.camera:camera-core:${camerax_version}")
  implementation("androidx.camera:camera-camera2:${camerax_version}")
  implementation("androidx.camera:camera-lifecycle:${camerax_version}")

domain/camera/src/main/java/com/google/jetpackcamera/domain/camera/CameraXCameraUseCase.kt

@@ -17,9 +17,13 @@ package com.google.jetpackcamera.domain.camera
 
 import android.app.Application
 import android.content.ContentValues
+import android.hardware.camera2.CameraCharacteristics
 import android.provider.MediaStore
 import android.util.Log
 import android.view.Display
+import androidx.annotation.OptIn
+import androidx.camera.camera2.interop.Camera2CameraInfo
+import androidx.camera.camera2.interop.ExperimentalCamera2Interop
 import androidx.camera.core.Camera
 import androidx.camera.core.CameraSelector
 import androidx.camera.core.CameraSelector.LensFacing
@@ -45,13 +49,13 @@ import com.google.jetpackcamera.settings.model.AspectRatio
 import com.google.jetpackcamera.settings.model.CameraAppSettings
 import com.google.jetpackcamera.settings.model.CaptureMode
 import com.google.jetpackcamera.settings.model.FlashModeStatus
-import java.util.Date
-import javax.inject.Inject
 import kotlinx.coroutines.CompletableDeferred
 import kotlinx.coroutines.CoroutineDispatcher
 import kotlinx.coroutines.asExecutor
 import kotlinx.coroutines.awaitCancellation
 import kotlinx.coroutines.coroutineScope
+import java.util.Date
+import javax.inject.Inject
 
 private const val TAG = "CameraXCameraUseCase"
 
@@ -70,14 +74,14 @@ constructor(
 
  // TODO apply flash from settings
  private val imageCaptureUseCase = ImageCapture.Builder().build()
- private val previewUseCase: Preview = Preview.Builder().build()
 
  private val recorder = Recorder.Builder().setExecutor(
  defaultDispatcher.asExecutor()
  ).build()
  private val videoCaptureUseCase = VideoCapture.withOutput(recorder)
  private var recording: Recording? = null
 
+ private lateinit var previewUseCase: Preview
  private lateinit var useCaseGroup: UseCaseGroup
 
  private lateinit var aspectRatio: AspectRatio
@@ -88,8 +92,9 @@ constructor(
  this.aspectRatio = currentCameraSettings.aspectRatio
  this.captureMode = currentCameraSettings.captureMode
  setFlashMode(currentCameraSettings.flashMode)
- updateUseCaseGroup()
+
  cameraProvider = ProcessCameraProvider.getInstance(application).await()
+ updateUseCaseGroup()
 
  val availableCameraLens =
  listOf(
@@ -197,6 +202,7 @@ constructor(
  // flips the camera to the designated lensFacing direction
  override suspend fun flipCamera(isFrontFacing: Boolean) {
  this.isFrontFacing = isFrontFacing
+ updateUseCaseGroup()
  rebindUseCases()
  }
 
@@ -252,6 +258,8 @@ constructor(
  }
 
  private fun updateUseCaseGroup() {
+ previewUseCase = createPreviewUseCase()
+
  val useCaseGroupBuilder =
  UseCaseGroup.Builder()
  .setViewPort(
@@ -268,6 +276,35 @@ constructor(
  useCaseGroup = useCaseGroupBuilder.build()
  }
 
+ @OptIn(ExperimentalCamera2Interop::class)
+ private fun createPreviewUseCase() : Preview {
+ var isPreviewStabilizationSupported = false
+
+ // TODO: find a better way to access camera info of front/back camera before binding
+ // use cases
+ val availableCameraInfo = cameraProvider.availableCameraInfos
+ if (availableCameraInfo.isNotEmpty()) {
+ for (cameraInfo in availableCameraInfo) {
+ val lensFacing = Camera2CameraInfo.from(cameraInfo).getCameraCharacteristic(
+ CameraCharacteristics.LENS_FACING)
+ if ((isFrontFacing && CameraCharacteristics.LENS_FACING_FRONT == lensFacing)
+ || (!isFrontFacing && CameraCharacteristics.LENS_FACING_BACK == lensFacing)) {
+ isPreviewStabilizationSupported =
+ Preview.getPreviewCapabilities(cameraInfo)
+ .isStabilizationSupported
+ }
+ }
+ }
+
+ val previewUseCaseBuilder = Preview.Builder()
+ // Enable preview stabilization if device capability supports
+ if (isPreviewStabilizationSupported) {
+ Log.d("JCA-CameraX", "PreviewStabilization enabled");
+ previewUseCaseBuilder.setPreviewStabilizationEnabled(true)
+ }
+ return previewUseCaseBuilder.build()
+ }
+
  // converts LensFacing from datastore to @LensFacing Int value
  private fun getLensFacing(isFrontFacing: Boolean): Int = when (isFrontFacing) {
  true -> CameraSelector.LENS_FACING_FRONT
@@ -280,6 +317,7 @@ constructor(
  getLensFacing(isFrontFacing)
  )
  cameraProvider.unbindAll()
+
  cameraProvider.runWith(cameraSelector, useCaseGroup) {
  camera = it
  awaitCancellation()

feature/preview/build.gradle.kts

@@ -92,7 +92,7 @@ dependencies {
  implementation("org.jetbrains.kotlinx:kotlinx-coroutines-guava:1.4.1")
 
  // CameraX
- val camerax_version = "1.3.0-SNAPSHOT"
+ val camerax_version = "1.4.0-SNAPSHOT"
  implementation("androidx.camera:camera-core:${camerax_version}")
  implementation("androidx.camera:camera-view:${camerax_version}")
 

settings.gradle.kts

@@ -25,7 +25,7 @@ dependencyResolutionManagement {
  repositoriesMode.set(RepositoriesMode.FAIL_ON_PROJECT_REPOS)
  repositories {
  maven {
- setUrl("https://androidx.dev/snapshots/builds/10707469/artifacts/repository")
+ setUrl("https://androidx.dev/snapshots/builds/10955671/artifacts/repository")
  }
  google()
  mavenCentral()