feat: New CameraDevice + CameraFormat detection using CameraX (#1495)

* Create CameraDevice.kt

* Create VideoStabilizationMode+String.kt

* Use CameraX Extensions

* Remove `system/no-camera-manager` error

android/src/main/java/com/mrousavy/camera/CameraViewModule.kt

@@ -163,177 +163,20 @@ class CameraViewModule(reactContext: ReactApplicationContext) : ReactContextBase
     }
   }
 
-  // TODO: This uses the Camera2 API to list all characteristics of a camera device and therefore doesn't work with Camera1. Find a way to use CameraX for this
-  // https://issuetracker.google.com/issues/179925896
   @ReactMethod
   fun getAvailableCameraDevices(promise: Promise) {
-    val startTime = System.currentTimeMillis()
     coroutineScope.launch {
       withPromise(promise) {
         val cameraProvider = ProcessCameraProvider.getInstance(reactApplicationContext).await()
         val extensionsManager = ExtensionsManager.getInstanceAsync(reactApplicationContext, cameraProvider).await()
+        val manager = reactApplicationContext.getSystemService(Context.CAMERA_SERVICE) as CameraManager
 
-        val manager = reactApplicationContext.getSystemService(Context.CAMERA_SERVICE) as? CameraManager
+        val devices = Arguments.createArray()
-          ?: throw CameraManagerUnavailableError()
+        manager.cameraIdList.forEach { cameraId ->
-
+          val device = CameraDevice(manager, extensionsManager, cameraId)
-        val cameraDevices: WritableArray = Arguments.createArray()
+          devices.pushMap(device.toMap())
-
-        manager.cameraIdList.forEach loop@{ id ->
-          val cameraSelector = CameraSelector.Builder().byID(id).build()
-
-          val characteristics = manager.getCameraCharacteristics(id)
-          val hardwareLevel = characteristics.get(CameraCharacteristics.INFO_SUPPORTED_HARDWARE_LEVEL)!!
-
-          val capabilities = characteristics.get(CameraCharacteristics.REQUEST_AVAILABLE_CAPABILITIES)!!
-          val isMultiCam = Build.VERSION.SDK_INT >= Build.VERSION_CODES.P &&
-            capabilities.contains(CameraCharacteristics.REQUEST_AVAILABLE_CAPABILITIES_LOGICAL_MULTI_CAMERA)
-          val deviceTypes = characteristics.getDeviceTypes()
-
-          val cameraConfig = characteristics.get(CameraCharacteristics.SCALER_STREAM_CONFIGURATION_MAP)!!
-          val lensFacing = characteristics.get(CameraCharacteristics.LENS_FACING)!!
-          val hasFlash = characteristics.get(CameraCharacteristics.FLASH_INFO_AVAILABLE)!!
-          val maxScalerZoom = characteristics.get(CameraCharacteristics.SCALER_AVAILABLE_MAX_DIGITAL_ZOOM)!!
-          val supportsDepthCapture = Build.VERSION.SDK_INT >= Build.VERSION_CODES.M &&
-            capabilities.contains(CameraCharacteristics.REQUEST_AVAILABLE_CAPABILITIES_DEPTH_OUTPUT)
-          val supportsRawCapture = capabilities.contains(CameraCharacteristics.REQUEST_AVAILABLE_CAPABILITIES_RAW)
-          val isoRange = characteristics.get(CameraCharacteristics.SENSOR_INFO_SENSITIVITY_RANGE)
-          val digitalStabilizationModes = characteristics.get(CameraCharacteristics.CONTROL_AVAILABLE_VIDEO_STABILIZATION_MODES)
-          val opticalStabilizationModes = characteristics.get(CameraCharacteristics.LENS_INFO_AVAILABLE_OPTICAL_STABILIZATION)
-          val zoomRange = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R)
-            characteristics.get(CameraCharacteristics.CONTROL_ZOOM_RATIO_RANGE)
-          else null
-          val name = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.P)
-            characteristics.get(CameraCharacteristics.INFO_VERSION)
-          else null
-          val fpsRanges = characteristics.get(CameraCharacteristics.CONTROL_AE_AVAILABLE_TARGET_FPS_RANGES)!!
-
-          val supportsHdr = extensionsManager.isExtensionAvailable(cameraSelector, ExtensionMode.HDR)
-          val supportsLowLightBoost = extensionsManager.isExtensionAvailable(cameraSelector, ExtensionMode.NIGHT)
-          // see https://developer.android.com/reference/android/hardware/camera2/CameraDevice#regular-capture
-          val supportsParallelVideoProcessing = hardwareLevel != CameraCharacteristics.INFO_SUPPORTED_HARDWARE_LEVEL_LEGACY && hardwareLevel != CameraCharacteristics.INFO_SUPPORTED_HARDWARE_LEVEL_LIMITED
-
-          val fieldOfView = characteristics.getFieldOfView()
-
-          val map = Arguments.createMap()
-          map.putString("id", id)
-          map.putArray("devices", deviceTypes)
-          map.putString("position", parseLensFacing(lensFacing))
-          map.putString("name", name ?: "${parseLensFacing(lensFacing)} ($id)")
-          map.putBoolean("hasFlash", hasFlash)
-          map.putBoolean("hasTorch", hasFlash)
-          map.putBoolean("isMultiCam", isMultiCam)
-          map.putBoolean("supportsParallelVideoProcessing", supportsParallelVideoProcessing)
-          map.putBoolean("supportsRawCapture", supportsRawCapture)
-          map.putBoolean("supportsDepthCapture", supportsDepthCapture)
-          map.putBoolean("supportsLowLightBoost", supportsLowLightBoost)
-          map.putBoolean("supportsFocus", true) // I believe every device here supports focussing
-          if (zoomRange != null) {
-            map.putDouble("minZoom", zoomRange.lower.toDouble())
-            map.putDouble("maxZoom", zoomRange.upper.toDouble())
-          } else {
-            map.putDouble("minZoom", 1.0)
-            map.putDouble("maxZoom", maxScalerZoom.toDouble())
-          }
-          map.putDouble("neutralZoom", 1.0)
-
-          val supportedVideoResolutions: List<Size>
-          val cameraInfos = cameraSelector.filter(cameraProvider.availableCameraInfos)
-          if (cameraInfos.size > 0) {
-            supportedVideoResolutions = QualitySelector
-              .getSupportedQualities(cameraInfos[0])
-              .map { QualitySelector.getResolution(cameraInfos[0], it)!! }
-          } else {
-            supportedVideoResolutions = emptyList()
-          }
-
-          // TODO: Optimize?
-          val maxImageOutputSize = cameraConfig.outputFormats
-            .flatMap { cameraConfig.getOutputSizes(it).toList() }
-            .maxByOrNull { it.width * it.height }!!
-
-          val formats = Arguments.createArray()
-
-          cameraConfig.outputFormats.forEach { formatId ->
-            val formatName = parseImageFormat(formatId)
-
-            cameraConfig.getOutputSizes(formatId).forEach { size ->
-              val isHighestPhotoQualitySupported = areUltimatelyEqual(size, maxImageOutputSize)
-
-              // Get the number of seconds that each frame will take to process
-              val secondsPerFrame = try {
-                cameraConfig.getOutputMinFrameDuration(formatId, size) / 1_000_000_000.0
-              } catch (error: Throwable) {
-                Log.e(TAG, "Minimum Frame Duration for MediaRecorder Output cannot be calculated, format \"$formatName\" is not supported.")
-                null
-              }
-
-              val frameRateRanges = Arguments.createArray()
-              if (secondsPerFrame != null && secondsPerFrame > 0) {
-                val fps = (1.0 / secondsPerFrame).toInt()
-                val frameRateRange = Arguments.createMap()
-                frameRateRange.putInt("minFrameRate", 1)
-                frameRateRange.putInt("maxFrameRate", fps)
-                frameRateRanges.pushMap(frameRateRange)
-              }
-              fpsRanges.forEach { range ->
-                val frameRateRange = Arguments.createMap()
-                frameRateRange.putInt("minFrameRate", range.lower)
-                frameRateRange.putInt("maxFrameRate", range.upper)
-                frameRateRanges.pushMap(frameRateRange)
-              }
-
-              val colorSpaces = Arguments.createArray()
-              colorSpaces.pushString(formatName)
-
-              val videoStabilizationModes = Arguments.createArray()
-              videoStabilizationModes.pushString("off")
-              if (digitalStabilizationModes != null) {
-                if (digitalStabilizationModes.contains(CameraCharacteristics.CONTROL_VIDEO_STABILIZATION_MODE_ON)) {
-                  videoStabilizationModes.pushString("auto")
-                  videoStabilizationModes.pushString("standard")
-                }
-              }
-              if (opticalStabilizationModes != null) {
-                if (opticalStabilizationModes.contains(CameraCharacteristics.LENS_OPTICAL_STABILIZATION_MODE_ON)) {
-                  videoStabilizationModes.pushString("cinematic")
-                }
-              }
-
-              // TODO: Get the pixel format programatically rather than assuming a default of 420v
-              val pixelFormat = "420v"
-
-              val format = Arguments.createMap()
-              format.putDouble("photoHeight", size.height.toDouble())
-              format.putDouble("photoWidth", size.width.toDouble())
-              // since supportedVideoResolutions is sorted from highest resolution to lowest,
-              // videoResolution will be the highest supported video resolution lower than or equal to photo resolution
-              // TODO: Somehow integrate with CamcorderProfileProxy?
-              val videoResolution = supportedVideoResolutions.find { it.width <= size.width && it.height <= size.height }
-              format.putDouble("videoHeight", videoResolution?.height?.toDouble())
-              format.putDouble("videoWidth", videoResolution?.width?.toDouble())
-              format.putBoolean("isHighestPhotoQualitySupported", isHighestPhotoQualitySupported)
-              format.putInt("maxISO", isoRange?.upper)
-              format.putInt("minISO", isoRange?.lower)
-              format.putDouble("fieldOfView", fieldOfView) // TODO: Revisit getAvailableCameraDevices (is fieldOfView accurate?)
-              format.putDouble("maxZoom", (zoomRange?.upper ?: maxScalerZoom).toDouble())
-              format.putArray("colorSpaces", colorSpaces)
-              format.putBoolean("supportsVideoHDR", false) // TODO: supportsVideoHDR
-              format.putBoolean("supportsPhotoHDR", supportsHdr)
-              format.putArray("frameRateRanges", frameRateRanges)
-              format.putString("autoFocusSystem", "none") // TODO: Revisit getAvailableCameraDevices (autoFocusSystem) (CameraCharacteristics.CONTROL_AF_AVAILABLE_MODES or CameraCharacteristics.LENS_INFO_FOCUS_DISTANCE_CALIBRATION)
-              format.putArray("videoStabilizationModes", videoStabilizationModes)
-              format.putString("pixelFormat", pixelFormat)
-              formats.pushMap(format)
-            }
-          }
-
-          map.putArray("formats", formats)
-          cameraDevices.pushMap(map)
         }
-
+        promise.resolve(devices)
-        val difference = System.currentTimeMillis() - startTime
-        Log.w(TAG, "CameraViewModule::getAvailableCameraDevices took: $difference ms")
-        return@withPromise cameraDevices
       }
     }
   }

android/src/main/java/com/mrousavy/camera/Errors.kt

@@ -106,7 +106,6 @@ class FileSizeLimitReachedError(cause: Throwable?) : CameraError("capture", "fil
 
 class NoRecordingInProgressError : CameraError("capture", "no-recording-in-progress", "No active recording in progress!")
 
-class CameraManagerUnavailableError : CameraError("system", "no-camera-manager", "The Camera manager instance was unavailable for the current Application!")
 class ViewNotFoundError(viewId: Int) : CameraError("system", "view-not-found", "The given view (ID $viewId) was not found in the view manager.")
 
 class UnknownCameraError(cause: Throwable?) : CameraError("unknown", "unknown", cause?.message ?: "An unknown camera error occured.", cause)

android/src/main/java/com/mrousavy/camera/parsers/VideoStabilizationMode+String.kt

@@ -0,0 +1,12 @@
+package com.mrousavy.camera.parsers
+
+import android.hardware.camera2.CameraMetadata.*
+
+fun parseVideoStabilizationMode(stabiliazionMode: Int): String {
+  return when (stabiliazionMode) {
+    CONTROL_VIDEO_STABILIZATION_MODE_OFF -> "off"
+    CONTROL_VIDEO_STABILIZATION_MODE_ON -> "standard"
+    CONTROL_VIDEO_STABILIZATION_MODE_PREVIEW_STABILIZATION -> "cinematic"
+    else -> "off"
+  }
+}

android/src/main/java/com/mrousavy/camera/utils/CameraDevice.kt

@@ -0,0 +1,219 @@
+package com.mrousavy.camera.utils
+
+import android.hardware.camera2.CameraCharacteristics
+import android.hardware.camera2.CameraExtensionCharacteristics
+import android.hardware.camera2.CameraManager
+import android.hardware.camera2.CameraMetadata
+import android.hardware.camera2.params.DynamicRangeProfiles
+import android.os.Build
+import android.util.Range
+import android.util.Size
+import androidx.camera.core.CameraSelector
+import androidx.camera.extensions.ExtensionMode
+import androidx.camera.extensions.ExtensionsManager
+import com.facebook.react.bridge.Arguments
+import com.facebook.react.bridge.ReadableArray
+import com.facebook.react.bridge.ReadableMap
+import com.mrousavy.camera.parsers.bigger
+import com.mrousavy.camera.parsers.parseImageFormat
+import com.mrousavy.camera.parsers.parseLensFacing
+import com.mrousavy.camera.parsers.parseVideoStabilizationMode
+import kotlin.math.PI
+import kotlin.math.atan
+
+class CameraDevice(private val cameraManager: CameraManager, extensionsManager: ExtensionsManager, private val cameraId: String) {
+  private val cameraSelector = CameraSelector.Builder().byID(cameraId).build()
+  private val characteristics = cameraManager.getCameraCharacteristics(cameraId)
+  private val hardwareLevel = characteristics.get(CameraCharacteristics.INFO_SUPPORTED_HARDWARE_LEVEL) ?: CameraCharacteristics.INFO_SUPPORTED_HARDWARE_LEVEL_LEGACY
+  private val capabilities = characteristics.get(CameraCharacteristics.REQUEST_AVAILABLE_CAPABILITIES) ?: IntArray(0)
+  private val extensions = getSupportedExtensions()
+
+  // device characteristics
+  private val isMultiCam = capabilities.contains(CameraCharacteristics.REQUEST_AVAILABLE_CAPABILITIES_LOGICAL_MULTI_CAMERA)
+  private val supportsDepthCapture = capabilities.contains(CameraCharacteristics.REQUEST_AVAILABLE_CAPABILITIES_DEPTH_OUTPUT)
+  private val supportsRawCapture = capabilities.contains(CameraCharacteristics.REQUEST_AVAILABLE_CAPABILITIES_RAW)
+  private val supportsLowLightBoost = extensionsManager.isExtensionAvailable(cameraSelector, ExtensionMode.NIGHT) || extensions.contains(CameraExtensionCharacteristics.EXTENSION_NIGHT)
+  private val lensFacing = characteristics.get(CameraCharacteristics.LENS_FACING)!!
+  private val hasFlash = characteristics.get(CameraCharacteristics.FLASH_INFO_AVAILABLE) ?: false
+  private val focalLengths = characteristics.get(CameraCharacteristics.LENS_INFO_AVAILABLE_FOCAL_LENGTHS) ?: FloatArray(0)
+  private val sensorSize = characteristics.get(CameraCharacteristics.SENSOR_INFO_PHYSICAL_SIZE)!!
+  private val name = (if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.P) characteristics.get(CameraCharacteristics.INFO_VERSION)
+                      else null) ?: "${parseLensFacing(lensFacing)} (${cameraId})"
+
+  // "formats" (all possible configurations for this device)
+  private val zoomRange = (if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R) characteristics.get(CameraCharacteristics.CONTROL_ZOOM_RATIO_RANGE)
+                           else null) ?: Range(1f, characteristics.get(CameraCharacteristics.SCALER_AVAILABLE_MAX_DIGITAL_ZOOM) ?: 1f)
+  private val minZoom = zoomRange.lower.toDouble()
+  private val maxZoom = zoomRange.upper.toDouble()
+
+  private val cameraConfig = characteristics.get(CameraCharacteristics.SCALER_STREAM_CONFIGURATION_MAP)!!
+  private val isoRange = characteristics.get(CameraCharacteristics.SENSOR_INFO_SENSITIVITY_RANGE) ?: Range(0, 0)
+  private val digitalStabilizationModes = characteristics.get(CameraCharacteristics.CONTROL_AVAILABLE_VIDEO_STABILIZATION_MODES) ?: IntArray(0)
+  private val opticalStabilizationModes = characteristics.get(CameraCharacteristics.LENS_INFO_AVAILABLE_OPTICAL_STABILIZATION) ?: IntArray(0)
+  private val supportsPhotoHdr = extensionsManager.isExtensionAvailable(cameraSelector, ExtensionMode.HDR) || extensions.contains(CameraExtensionCharacteristics.EXTENSION_HDR)
+  private val supportsVideoHdr = getHasVideoHdr()
+
+  // see https://developer.android.com/reference/android/hardware/camera2/CameraDevice#regular-capture
+  private val supportsParallelVideoProcessing = hardwareLevel != CameraCharacteristics.INFO_SUPPORTED_HARDWARE_LEVEL_LEGACY && hardwareLevel != CameraCharacteristics.INFO_SUPPORTED_HARDWARE_LEVEL_LIMITED
+
+  // get extensions (HDR, Night Mode, ..)
+  private fun getSupportedExtensions(): List<Int> {
+    return if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.S) {
+      val extensions = cameraManager.getCameraExtensionCharacteristics(cameraId)
+      extensions.supportedExtensions
+    } else {
+      emptyList()
+    }
+  }
+
+  private fun getHasVideoHdr(): Boolean {
+    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU) {
+      if (capabilities.contains(CameraMetadata.REQUEST_AVAILABLE_CAPABILITIES_DYNAMIC_RANGE_TEN_BIT)) {
+        val availableProfiles = characteristics.get(CameraCharacteristics.REQUEST_AVAILABLE_DYNAMIC_RANGE_PROFILES)
+          ?: DynamicRangeProfiles(LongArray(0))
+        return availableProfiles.supportedProfiles.contains(DynamicRangeProfiles.HLG10)
+      }
+    }
+    return false
+  }
+
+  private fun createFrameRateRanges(ranges: Array<Range<Int>>): ReadableArray {
+    val array = Arguments.createArray()
+    ranges.forEach { range ->
+      val map = Arguments.createMap()
+      map.putInt("minFrameRate", range.lower)
+      map.putInt("maxFrameRate", range.upper)
+      array.pushMap(map)
+    }
+    return array
+  }
+
+  private fun createFrameRateRanges(minFps: Int, maxFps: Int): ReadableArray {
+    return createFrameRateRanges(arrayOf(Range(minFps, maxFps)))
+  }
+
+  private fun createColorSpaces(): ReadableArray {
+    val array = Arguments.createArray()
+    array.pushString("yuv")
+    return array
+  }
+
+  private fun createStabilizationModes(): ReadableArray {
+    val array = Arguments.createArray()
+    val videoStabilizationModes = digitalStabilizationModes.plus(opticalStabilizationModes)
+    videoStabilizationModes.forEach { videoStabilizationMode ->
+      array.pushString(parseVideoStabilizationMode(videoStabilizationMode))
+    }
+    return array
+  }
+
+
+  // 35mm is 135 film format, a standard in which focal lengths are usually measured
+  private val size35mm = Size(36, 24)
+
+  private fun getDeviceTypes(): ReadableArray {
+    // TODO: Check if getDeviceType() works correctly, even for logical multi-cameras
+
+    // To get valid focal length standards we have to upscale to the 35mm measurement (film standard)
+    val cropFactor = size35mm.bigger / sensorSize.bigger
+
+    val deviceTypes = Arguments.createArray()
+
+    // https://en.wikipedia.org/wiki/Telephoto_lens
+    val containsTelephoto = focalLengths.any { l -> (l * cropFactor) > 35 } // TODO: Telephoto lenses are > 85mm, but we don't have anything between that range..
+    // val containsNormalLens = focalLengths.any { l -> (l * cropFactor) > 35 && (l * cropFactor) <= 55 }
+    // https://en.wikipedia.org/wiki/Wide-angle_lens
+    val containsWideAngle = focalLengths.any { l -> (l * cropFactor) >= 24 && (l * cropFactor) <= 35 }
+    // https://en.wikipedia.org/wiki/Ultra_wide_angle_lens
+    val containsUltraWideAngle = focalLengths.any { l -> (l * cropFactor) < 24 }
+
+    if (containsTelephoto)
+      deviceTypes.pushString("telephoto-camera")
+    if (containsWideAngle)
+      deviceTypes.pushString("wide-angle-camera")
+    if (containsUltraWideAngle)
+      deviceTypes.pushString("ultra-wide-angle-camera")
+
+    return deviceTypes
+  }
+
+  private fun getFieldOfView(): Double {
+    return 2 * atan(sensorSize.bigger / (focalLengths[0] * 2)) * (180 / PI)
+  }
+
+  private fun buildFormatMap(outputSize: Size, outputFormat: Int, fpsRanges: ReadableArray): ReadableMap {
+    val highResSizes = (if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) cameraConfig.getHighResolutionOutputSizes(outputFormat) else null) ?: emptyArray()
+
+    val map = Arguments.createMap()
+    map.putInt("photoHeight", outputSize.height)
+    map.putInt("photoWidth", outputSize.width)
+    map.putInt("videoHeight", outputSize.height)
+    map.putInt("videoWidth", outputSize.width)
+    map.putBoolean("isHighestPhotoQualitySupported", highResSizes.contains(outputSize))
+    map.putInt("maxISO", isoRange.upper)
+    map.putInt("minISO", isoRange.lower)
+    map.putDouble("fieldOfView", getFieldOfView())
+    map.putArray("colorSpaces", createColorSpaces())
+    map.putBoolean("supportsVideoHDR", supportsVideoHdr)
+    map.putBoolean("supportsPhotoHDR", supportsPhotoHdr)
+    map.putString("autoFocusSystem", "contrast-detection") // TODO: Is this wrong?
+    map.putArray("videoStabilizationModes", createStabilizationModes())
+    map.putString("pixelFormat", parseImageFormat(outputFormat))
+    map.putArray("frameRateRanges", fpsRanges)
+    return map
+  }
+
+  private fun getFormats(): ReadableArray {
+    val array = Arguments.createArray()
+
+    val highSpeedSizes = cameraConfig.highSpeedVideoSizes
+
+    val outputFormats = cameraConfig.outputFormats
+    outputFormats.forEach { outputFormat ->
+      // Normal Video/Photo Sizes
+      val outputSizes = cameraConfig.getOutputSizes(outputFormat)
+      outputSizes.forEach { outputSize ->
+        val frameDuration = cameraConfig.getOutputMinFrameDuration(outputFormat, outputSize)
+        val maxFps = (1.0 / (frameDuration.toDouble() / 1000000000)).toInt()
+        val minFps = 1
+
+        val map = buildFormatMap(outputSize, outputFormat, createFrameRateRanges(minFps, maxFps))
+        array.pushMap(map)
+      }
+
+      // High-Speed (Slow Motion) Video Sizes
+      highSpeedSizes.forEach { outputSize ->
+        val highSpeedRanges = cameraConfig.getHighSpeedVideoFpsRangesFor(outputSize)
+
+        val map = buildFormatMap(outputSize, outputFormat, createFrameRateRanges(highSpeedRanges))
+        array.pushMap(map)
+      }
+    }
+
+    return array
+  }
+
+  // convert to React Native JS object (map)
+  fun toMap(): ReadableMap {
+    val map = Arguments.createMap()
+    map.putString("id", cameraId)
+    map.putArray("devices", getDeviceTypes())
+    map.putString("position", parseLensFacing(lensFacing))
+    map.putString("name", name)
+    map.putBoolean("hasFlash", hasFlash)
+    map.putBoolean("hasTorch", hasFlash)
+    map.putBoolean("isMultiCam", isMultiCam)
+    map.putBoolean("supportsParallelVideoProcessing", supportsParallelVideoProcessing)
+    map.putBoolean("supportsRawCapture", supportsRawCapture)
+    map.putBoolean("supportsDepthCapture", supportsDepthCapture)
+    map.putBoolean("supportsLowLightBoost", supportsLowLightBoost)
+    map.putBoolean("supportsFocus", true) // I believe every device here supports focussing
+    map.putDouble("minZoom", minZoom)
+    map.putDouble("maxZoom", maxZoom)
+    map.putDouble("neutralZoom", 1.0) // Zoom is always relative to 1.0 on Android
+
+    map.putArray("formats", getFormats())
+
+    return map
+  }
+}

ios/CameraError.swift

@@ -252,23 +252,6 @@ enum CaptureError {
   }
 }
 
-// MARK: - SystemError
-
-enum SystemError: String {
-  case noManager = "no-camera-manager"
-
-  var code: String {
-    return rawValue
-  }
-
-  var message: String {
-    switch self {
-    case .noManager:
-      return "No Camera Manager was found."
-    }
-  }
-}
-
 // MARK: - CameraError
 
 enum CameraError: Error {
@@ -295,8 +278,6 @@ enum CameraError: Error {
       return "session/\(id.code)"
     case let .capture(id: id):
       return "capture/\(id.code)"
-    case let .system(id: id):
-      return "system/\(id.code)"
     case .unknown:
       return "unknown/unknown"
     }
@@ -316,8 +297,6 @@ enum CameraError: Error {
       return id.message
     case let .capture(id: id):
       return id.message
-    case let .system(id: id):
-      return id.message
     case let .unknown(message: message):
       return message ?? "An unexpected error occured."
     }