555474be7d
* Use factor instead of percent for `neutralZoom` * fix zoom calculation * Update CameraPage.tsx
59 lines
2.5 KiB
Kotlin
59 lines
2.5 KiB
Kotlin
package com.mrousavy.camera.utils
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import android.hardware.camera2.CameraCharacteristics
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import android.util.Size
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import com.facebook.react.bridge.Arguments
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import com.facebook.react.bridge.ReadableArray
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import com.mrousavy.camera.parsers.bigger
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import kotlin.math.PI
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import kotlin.math.atan
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// 35mm is 135 film format, a standard in which focal lengths are usually measured
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val Size35mm = Size(36, 24)
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/**
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* Convert a given array of focal lengths to the corresponding TypeScript union type name.
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*
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* Possible values for single cameras:
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* * `"wide-angle-camera"`
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* * `"ultra-wide-angle-camera"`
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* * `"telephoto-camera"`
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*
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* Sources for the focal length categories:
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* * [Telephoto Lens (wikipedia)](https://en.wikipedia.org/wiki/Telephoto_lens)
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* * [Normal Lens (wikipedia)](https://en.wikipedia.org/wiki/Normal_lens)
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* * [Wide-Angle Lens (wikipedia)](https://en.wikipedia.org/wiki/Wide-angle_lens)
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* * [Ultra-Wide-Angle Lens (wikipedia)](https://en.wikipedia.org/wiki/Ultra_wide_angle_lens)
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*/
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fun CameraCharacteristics.getDeviceTypes(): ReadableArray {
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// TODO: Check if getDeviceType() works correctly, even for logical multi-cameras
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val focalLengths = this.get(CameraCharacteristics.LENS_INFO_AVAILABLE_FOCAL_LENGTHS)!!
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val sensorSize = this.get(CameraCharacteristics.SENSOR_INFO_PHYSICAL_SIZE)!!
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// To get valid focal length standards we have to upscale to the 35mm measurement (film standard)
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val cropFactor = Size35mm.bigger / sensorSize.bigger
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val deviceTypes = Arguments.createArray()
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val containsTelephoto = focalLengths.any { l -> (l * cropFactor) > 35 } // TODO: Telephoto lenses are > 85mm, but we don't have anything between that range..
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// val containsNormalLens = focalLengths.any { l -> (l * cropFactor) > 35 && (l * cropFactor) <= 55 }
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val containsWideAngle = focalLengths.any { l -> (l * cropFactor) >= 24 && (l * cropFactor) <= 35 }
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val containsUltraWideAngle = focalLengths.any { l -> (l * cropFactor) < 24 }
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if (containsTelephoto)
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deviceTypes.pushString("telephoto-camera")
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if (containsWideAngle)
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deviceTypes.pushString("wide-angle-camera")
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if (containsUltraWideAngle)
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deviceTypes.pushString("ultra-wide-angle-camera")
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return deviceTypes
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}
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fun CameraCharacteristics.getFieldOfView(): Double {
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val focalLengths = this.get(CameraCharacteristics.LENS_INFO_AVAILABLE_FOCAL_LENGTHS)!!
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val sensorSize = this.get(CameraCharacteristics.SENSOR_INFO_PHYSICAL_SIZE)!!
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return 2 * atan(sensorSize.bigger / (focalLengths[0] * 2)) * (180 / PI)
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}
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