Migrate to new ML Barcode recognition library

Author: shockbytes

app/build.gradle

@@ -97,13 +97,11 @@ dependencies {
     implementation "androidx.lifecycle:lifecycle-extensions:$archXVersion"
     implementation "androidx.lifecycle:lifecycle-reactivestreams-ktx:$archXVersion"
     implementation "androidx.lifecycle:lifecycle-common-java8:$archXVersion"
-    implementation "com.google.android.gms:play-services-vision:$playServicesVersionVision"
     implementation "com.google.android.gms:play-services-auth:$playServicesVersionAuth"
     implementation "com.google.firebase:firebase-crashlytics:$firebaseCrashlyticsVersion"
     implementation "com.google.firebase:firebase-core:$firebaseVersionCore"
     implementation "com.google.firebase:firebase-config:$firebaseVersionConfig"
     implementation "com.google.firebase:firebase-auth:$firebaseVersionAuth"
-    implementation "com.google.firebase:firebase-ml-vision:$firebaseMLVision"
 
 
     implementation ('com.google.http-client:google-http-client-gson:1.36.0') {

build.gradle

@@ -50,12 +50,12 @@ ext {
     firebaseVersionCore = "18.0.0"
     firebaseVersionConfig = "20.0.0"
     firebaseVersionAuth = "20.0.0"
-    firebaseMLVision = "24.1.0"
     firebaseAnalyticsVersion = "17.6.0"
     firebaseCrashlyticsVersion = "17.2.2"
 
     playServicesVersionVision = "20.1.2"
     playServicesVersionAuth = "19.0.0"
+    mlBarcodeVersion = "16.0.3"
 
     daggerVersion = "2.27"
     retrofitVersion = "2.9.0"

camera/build.gradle

@@ -56,5 +56,5 @@ dependencies {
     implementation "androidx.camera:camera-extensions:${rootProject.cameraXExtensionVersion}"
 
     implementation "com.jakewharton.timber:timber:$timberVersion"
-    implementation "com.google.firebase:firebase-ml-vision:$firebaseMLVision"
+    implementation "com.google.mlkit:barcode-scanning:$mlBarcodeVersion"
 }

camera/src/main/java/at/shockbytes/dante/camera/analyzer/BarcodeAnalyzer.kt

@@ -2,26 +2,22 @@ package at.shockbytes.dante.camera.analyzer
 
 import android.annotation.SuppressLint
 import android.util.Size
-import android.view.Surface.ROTATION_180
-import android.view.Surface.ROTATION_270
-import android.view.Surface.ROTATION_90
 import androidx.camera.core.ImageAnalysis
 import androidx.camera.core.ImageProxy
 import at.shockbytes.dante.camera.IsbnVisionBarcode
-import com.google.firebase.ml.vision.FirebaseVision
-import com.google.firebase.ml.vision.barcode.FirebaseVisionBarcode
-import com.google.firebase.ml.vision.barcode.FirebaseVisionBarcodeDetector
-import com.google.firebase.ml.vision.barcode.FirebaseVisionBarcodeDetectorOptions
-import com.google.firebase.ml.vision.common.FirebaseVisionImage
-import com.google.firebase.ml.vision.common.FirebaseVisionImageMetadata
+import com.google.mlkit.vision.barcode.Barcode
+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.common.InputImage
 import io.reactivex.Observable
 import io.reactivex.subjects.PublishSubject
 import timber.log.Timber
 import java.util.concurrent.TimeUnit
 
 class BarcodeAnalyzer(private val rotationDegrees: Int) : ImageAnalysis.Analyzer {
 
-    private val detector: FirebaseVisionBarcodeDetector
+    private val detector: BarcodeScanner
 
     private var lastAnalyzedTimestamp = 0L
 
@@ -33,16 +29,14 @@ class BarcodeAnalyzer(private val rotationDegrees: Int) : ImageAnalysis.Analyzer
 
     init {
 
-        val options = FirebaseVisionBarcodeDetectorOptions.Builder()
+        val options = BarcodeScannerOptions.Builder()
             .setBarcodeFormats(
-                FirebaseVisionBarcode.FORMAT_EAN_13,
-                FirebaseVisionBarcode.FORMAT_EAN_8
+                Barcode.FORMAT_EAN_13,
+                Barcode.FORMAT_EAN_8
             )
             .build()
 
-        detector = FirebaseVision
-            .getInstance()
-            .getVisionBarcodeDetector(options)
+        detector = BarcodeScanning.getClient(options)
     }
 
     @SuppressLint("UnsafeExperimentalUsageError")
@@ -52,16 +46,15 @@ class BarcodeAnalyzer(private val rotationDegrees: Int) : ImageAnalysis.Analyzer
 
         val size = Size(imageProxy.width, imageProxy.height)
 
-        val proxImage = imageProxy.image
-        if (proxImage == null) {
+        val proxyImage = imageProxy.image
+        if (proxyImage == null) {
             Timber.e("CAM: Image is null")
             return
         }
 
-        val rotationCompensation = getRotation(rotationDegrees)
-        val image = FirebaseVisionImage.fromMediaImage(proxImage, rotationCompensation)
+        val image = InputImage.fromMediaImage(proxyImage, imageProxy.imageInfo.rotationDegrees)
 
-        detector.detectInImage(image)
+        detector.process(image)
             .addOnSuccessListener { codes ->
                 if (codes.isNotEmpty()) {
 
@@ -94,13 +87,4 @@ class BarcodeAnalyzer(private val rotationDegrees: Int) : ImageAnalysis.Analyzer
         // Close proxy at the end
         imageProxy.close()
     }
-
-    private fun getRotation(rotationCompensation: Int): Int {
-        return when (rotationCompensation) {
-            ROTATION_90 -> FirebaseVisionImageMetadata.ROTATION_90
-            ROTATION_180 -> FirebaseVisionImageMetadata.ROTATION_180
-            ROTATION_270 -> FirebaseVisionImageMetadata.ROTATION_270
-            else -> FirebaseVisionImageMetadata.ROTATION_0
-        }
-    }
 }