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migrate qr code scanning to raw mlkit with camerax
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79 changes: 79 additions & 0 deletions
79
shared/src/androidMain/kotlin/ml/dev/kotlin/openotp/qr/QRCodeAnalyzer.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,79 @@ | ||
| package ml.dev.kotlin.openotp.qr | ||
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| import android.media.Image | ||
| import androidx.camera.core.ExperimentalGetImage | ||
| import androidx.camera.core.ImageAnalysis | ||
| import androidx.camera.core.ImageProxy | ||
| import com.google.mlkit.vision.barcode.BarcodeScanner | ||
| import com.google.mlkit.vision.barcode.BarcodeScannerOptions | ||
| import com.google.mlkit.vision.barcode.BarcodeScanning | ||
| import com.google.mlkit.vision.barcode.common.Barcode | ||
| import com.google.mlkit.vision.common.InputImage | ||
| import java.lang.System.currentTimeMillis | ||
|
|
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| internal class QRCodeAnalyzer( | ||
| private val handle: (QRResult) -> Unit, | ||
| private val onPassCompleted: (failureOccurred: Boolean) -> Unit, | ||
| ) : ImageAnalysis.Analyzer { | ||
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| private val barcodeScanner: BarcodeScanner? by lazy { | ||
| try { | ||
| BarcodeScanning.getClient( | ||
| BarcodeScannerOptions.Builder() | ||
| .setBarcodeFormats(Barcode.FORMAT_QR_CODE) | ||
| .build() | ||
| ) | ||
| } catch (e: Exception) { | ||
| handleSynchronized(QRResult.QRError(e)) | ||
| null | ||
| } | ||
| } | ||
|
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| @Volatile | ||
| private var failureTimestamp: Long = NO_FAILURE_FLAG | ||
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| @ExperimentalGetImage | ||
| override fun analyze(imageProxy: ImageProxy) { | ||
| val image = imageProxy.image ?: return | ||
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| if (failureTimestamp.isFailure && currentTimeMillis() - failureTimestamp < FAILURE_THROTTLE_MILLIS) { | ||
| return imageProxy.close() | ||
| } | ||
| failureTimestamp = NO_FAILURE_FLAG | ||
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| val scanner = barcodeScanner ?: return | ||
| val rotationDegrees = imageProxy.imageInfo.rotationDegrees | ||
| scanner | ||
| .process(image.toInputImage(rotationDegrees)) | ||
| .addOnSuccessListener { onNonEmptySuccess(it) } | ||
| .addOnFailureListener { | ||
| failureTimestamp = currentTimeMillis() | ||
| handleSynchronized(QRResult.QRError(it)) | ||
| } | ||
| .addOnCompleteListener { | ||
| onPassCompleted(failureTimestamp.isFailure) | ||
| imageProxy.close() | ||
| } | ||
| } | ||
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| @Synchronized | ||
| private fun handleSynchronized(result: QRResult) { | ||
| handle(result) | ||
| } | ||
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| private fun onNonEmptySuccess(codes: List<Barcode?>?) { | ||
| val someCodes = codes?.mapNotNull { it?.rawValue }?.takeIf { it.isNotEmpty() } ?: return | ||
| handleSynchronized(QRResult.QRSuccess(someCodes)) | ||
| } | ||
| } | ||
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| private const val FAILURE_THROTTLE_MILLIS: Long = 1_000L | ||
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| private const val NO_FAILURE_FLAG: Long = Long.MIN_VALUE | ||
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| private inline val Long.isFailure: Boolean get() = this != NO_FAILURE_FLAG | ||
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| @ExperimentalGetImage | ||
| private fun Image.toInputImage(rotationDegrees: Int): InputImage = | ||
| InputImage.fromMediaImage(this, rotationDegrees) |
105 changes: 84 additions & 21 deletions
105
shared/src/androidMain/kotlin/ml/dev/kotlin/openotp/qr/QRCodeScanner.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,30 +1,93 @@ | ||
| package ml.dev.kotlin.openotp.qr | ||
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| import androidx.activity.compose.rememberLauncherForActivityResult | ||
| import android.widget.LinearLayout.LayoutParams | ||
| import androidx.appcompat.widget.ListPopupWindow | ||
| import androidx.camera.view.LifecycleCameraController | ||
| import androidx.camera.view.PreviewView | ||
| import androidx.compose.foundation.layout.PaddingValues | ||
| import androidx.compose.foundation.layout.fillMaxSize | ||
| import androidx.compose.foundation.layout.padding | ||
| import androidx.compose.material3.MaterialTheme | ||
| import androidx.compose.runtime.Composable | ||
| import io.github.g00fy2.quickie.ScanCustomCode | ||
| import io.github.g00fy2.quickie.config.ScannerConfig | ||
| import io.github.g00fy2.quickie.QRResult as LibQRResult | ||
| import androidx.compose.runtime.DisposableEffect | ||
| import androidx.compose.runtime.remember | ||
| import androidx.compose.ui.Modifier | ||
| import androidx.compose.ui.graphics.toArgb | ||
| import androidx.compose.ui.platform.LocalContext | ||
| import androidx.compose.ui.platform.LocalLifecycleOwner | ||
| import androidx.compose.ui.viewinterop.AndroidView | ||
| import com.google.accompanist.permissions.PermissionStatus | ||
| import com.google.accompanist.permissions.rememberPermissionState | ||
| import java.util.concurrent.ExecutorService | ||
| import java.util.concurrent.Executors | ||
|
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||
| @Composable | ||
| actual fun rememberQRCodeScanner(resultHandler: (QRResult) -> Unit): (() -> Unit)? { | ||
| val scanQrCodeLauncher = rememberLauncherForActivityResult(ScanCustomCode()) { | ||
| val result = when (it) { | ||
| is LibQRResult.QRError -> QRResult.QRError(it.exception) | ||
| LibQRResult.QRMissingPermission -> QRResult.QRMissingPermission | ||
| is LibQRResult.QRSuccess -> QRResult.QRSuccess(it.content.rawValue) | ||
| LibQRResult.QRUserCanceled -> QRResult.QRUserCanceled | ||
| actual fun QRCodeScanner( | ||
| onResult: (QRResult) -> Boolean, | ||
| innerPadding: PaddingValues, | ||
| onIsLoadingChange: (Boolean) -> Unit, | ||
| ) { | ||
| val localContext = LocalContext.current | ||
| val lifecycleOwner = LocalLifecycleOwner.current | ||
| val backgroundColor = MaterialTheme.colorScheme.background | ||
| val analysisExecutor = rememberExecutor() | ||
| val cameraController = remember { LifecycleCameraController(localContext) } | ||
| AndroidView( | ||
| modifier = Modifier | ||
| .fillMaxSize() | ||
| .padding(innerPadding), | ||
| factory = { context -> | ||
| PreviewView(context).apply { | ||
| setBackgroundColor(backgroundColor.toArgb()) | ||
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| layoutParams = LayoutParams(ListPopupWindow.MATCH_PARENT, ListPopupWindow.MATCH_PARENT) | ||
| scaleType = PreviewView.ScaleType.FILL_START | ||
| implementationMode = PreviewView.ImplementationMode.COMPATIBLE | ||
| controller = cameraController | ||
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| var handleNext = true | ||
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| cameraController.setImageAnalysisAnalyzer( | ||
| analysisExecutor, | ||
| QRCodeAnalyzer( | ||
| handle = { handleNext = handleNext && onResult(it) }, | ||
| onPassCompleted = { failureOccurred -> onIsLoadingChange(failureOccurred) }, | ||
| ) | ||
| ) | ||
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| cameraController.bindToLifecycle(lifecycleOwner) | ||
| } | ||
| }, | ||
| onRelease = { | ||
| cameraController.unbind() | ||
| analysisExecutor.shutdown() | ||
| } | ||
| resultHandler(result) | ||
| } | ||
| return { | ||
| scanQrCodeLauncher.launch( | ||
| ScannerConfig.build { | ||
| setHapticSuccessFeedback(true) | ||
| setHorizontalFrameRatio(1f) | ||
| setShowCloseButton(true) | ||
| setShowTorchToggle(true) | ||
| ) | ||
| } | ||
|
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| @Composable | ||
| actual fun rememberCameraPermissionState(): CameraPermissionState? { | ||
| val cameraPermissionState = rememberPermissionState( | ||
| android.Manifest.permission.CAMERA | ||
| ) | ||
| return object : CameraPermissionState { | ||
| override val permission: CameraPermission | ||
| get() = when (cameraPermissionState.status) { | ||
| PermissionStatus.Granted -> CameraPermission.Granted | ||
| is PermissionStatus.Denied -> CameraPermission.Denied | ||
| } | ||
| ) | ||
|
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| override fun launchRequest() = cameraPermissionState.launchPermissionRequest() | ||
| } | ||
| } | ||
|
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| @Composable | ||
| private fun rememberExecutor(): ExecutorService { | ||
| val executor = remember { Executors.newSingleThreadExecutor() } | ||
| DisposableEffect(Unit) { | ||
| onDispose { | ||
| executor.shutdown() | ||
| } | ||
| } | ||
| return executor | ||
| } |
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