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chore: android use wide angle camera
author
nate
date
(Jan 22, 2026, 3:02 PM +0200)
commit
47014b33
47014b33ee36da3d12ecdb40cc1220ff5a4a942a
parent
0cf98462
0cf98462d3fde66b0a17bd8a9826ef3e7bc747f1
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posedetection/build.gradle.kts
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posedetection/build.gradle.kts
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mavenPublishing {
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publishToMavenCentral(SonatypeHost.CENTRAL_PORTAL)
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coordinates("com.performancecoachlab.posedetection", "posedetection-compose", "4.5.1")
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coordinates("com.performancecoachlab.posedetection", "posedetection-compose", "4.6.0")
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pom {
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name.set("Pose Detection")
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posedetection/src/androidMain/kotlin/com.performancecoachlab/posedetection/camera/CameraView.android.kt
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posedetection/src/androidMain/kotlin/com.performancecoachlab/posedetection/camera/CameraView.android.kt
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import kotlinx.coroutines.launch
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import org.tensorflow.lite.support.image.TensorImage
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import org.tensorflow.lite.task.vision.detector.ObjectDetector
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import android.hardware.camera2.CameraCharacteristics
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import androidx.camera.camera2.interop.Camera2CameraInfo
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import androidx.camera.core.CameraInfo
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import androidx.camera.core.CameraSelector
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import co.touchlab.kermit.Logger
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// Data class to hold recording state for each recording ID
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data class RecordingSlot(
···
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var firstTimestampMs: Long? = null,
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val outputPath: String
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)
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private fun buildBackUltraWideSelectorOrNull(cameraProvider: ProcessCameraProvider): CameraSelector? {
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return try {
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val bestBackInfo: CameraInfo? = cameraProvider.availableCameraInfos
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.asSequence()
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.filter { info ->
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Camera2CameraInfo.from(info)
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.getCameraCharacteristic(CameraCharacteristics.LENS_FACING) == CameraCharacteristics.LENS_FACING_BACK
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}
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.mapNotNull { info ->
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val focalLengths: FloatArray? = Camera2CameraInfo.from(info)
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.getCameraCharacteristic(CameraCharacteristics.LENS_INFO_AVAILABLE_FOCAL_LENGTHS)
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val minFocal = focalLengths?.minOrNull()
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if (minFocal != null) info to minFocal else null
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}
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// Smallest focal length => widest FOV (ultra-wide on multi-cam devices)
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.minByOrNull { (_, minFocal) -> minFocal }
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?.first
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bestBackInfo?.let { selectedInfo ->
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CameraSelector.Builder()
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.addCameraFilter { cameraInfos ->
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// Defensive: ensure we ONLY ever return a back-facing camera.
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cameraInfos.filter { candidate ->
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candidate == selectedInfo &&
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Camera2CameraInfo.from(candidate)
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.getCameraCharacteristic(CameraCharacteristics.LENS_FACING) == CameraCharacteristics.LENS_FACING_BACK
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}
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}
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.build()
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}
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} catch (t: Throwable) {
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Logger.w(t) { "Failed to select ultra-wide back camera, falling back to default back." }
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null
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}
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}
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@OptIn(ExperimentalGetImage::class)
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@Composable
···
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}
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LaunchedEffect(lifecycleOwner) {
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LaunchedEffect(lifecycleOwner, frontCamera) {
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val cameraProvider = ProcessCameraProvider.getInstance(context).get()
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cameraProvider.unbindAll()
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val cameraSelector = if (frontCamera) DEFAULT_FRONT_CAMERA else DEFAULT_BACK_CAMERA
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val cameraSelector = if (frontCamera) {
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DEFAULT_FRONT_CAMERA
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} else {
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buildBackUltraWideSelectorOrNull(cameraProvider) ?: DEFAULT_BACK_CAMERA
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}
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val preview = Preview.Builder().build().also {
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it.surfaceProvider = previewView.surfaceProvider
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}
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}
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}
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}
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cameraProvider.bindToLifecycle(
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val camera = cameraProvider.bindToLifecycle(
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lifecycleOwner,
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cameraSelector,
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preview,
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imageAnalysis
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)
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// Helpful debug: see which physical camera ID CameraX picked.
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runCatching {
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val cameraId = Camera2CameraInfo.from(camera.cameraInfo).cameraId
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Logger.d { "CameraX bound cameraId=$cameraId frontCamera=$frontCamera" }
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}
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previewView.scaleType = PreviewView.ScaleType.FIT_CENTER
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}
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Box(