119 lines
3.8 KiB
Kotlin
119 lines
3.8 KiB
Kotlin
/*
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* Pupil, Hitomi.la viewer for Android
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* Copyright (C) 2020 tom5079
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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@file:Suppress("DEPRECATION", "Recycle")
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package xyz.quaver.pupil.util
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import android.content.Context
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import android.content.pm.PackageManager
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import android.graphics.ImageFormat
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import android.graphics.SurfaceTexture
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import android.hardware.Camera
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import android.view.Surface
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import android.view.WindowManager
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import com.google.android.gms.tasks.Task
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import com.google.mlkit.vision.common.InputImage
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import com.google.mlkit.vision.face.Face
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import com.google.mlkit.vision.face.FaceDetection
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import com.google.mlkit.vision.face.FaceDetectorOptions
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/** Check if this device has a camera */
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private fun Context.checkCameraHardware() =
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this.packageManager.hasSystemFeature(PackageManager.FEATURE_CAMERA)
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private fun openFrontCamera() : Pair<Camera?, Int> {
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var camera: Camera? = null
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var cameraID: Int = -1
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val cameraInfo = Camera.CameraInfo()
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for (i in 0 until Camera.getNumberOfCameras()) {
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Camera.getCameraInfo(i, cameraInfo)
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if (cameraInfo.facing == Camera.CameraInfo.CAMERA_FACING_FRONT)
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runCatching { Camera.open(i) }.getOrNull()?.let { camera = it; cameraID = i }
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if (camera != null) break
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}
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return Pair(camera, cameraID)
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}
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val orientations = mapOf(
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Surface.ROTATION_0 to 0,
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Surface.ROTATION_90 to 90,
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Surface.ROTATION_180 to 180,
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Surface.ROTATION_270 to 270,
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)
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private fun getRotation(context: Context, cameraID: Int): Int {
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val cameraRotation = Camera.CameraInfo().also { Camera.getCameraInfo(cameraID, it) }.orientation
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val rotation = orientations[(context.getSystemService(Context.WINDOW_SERVICE) as WindowManager).defaultDisplay.rotation] ?: error("")
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return (cameraRotation + rotation) % 360
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}
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var camera: Camera? = null
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var surfaceTexture: SurfaceTexture? = null
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private val detector = FaceDetection.getClient(
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FaceDetectorOptions.Builder()
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.setClassificationMode(FaceDetectorOptions.CLASSIFICATION_MODE_ALL)
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.build()
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)
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private var process: Task<List<Face>>? = null
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fun startCamera(context: Context, callback: (List<Face>) -> Unit) {
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if (camera != null) closeCamera()
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val cameraID = openFrontCamera().let { (cam, cameraID) ->
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cam ?: return
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camera = cam
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cameraID
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}
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with (camera!!) {
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parameters = parameters.apply {
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setPreviewSize(640, 480)
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previewFormat = ImageFormat.NV21
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}
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setPreviewTexture(surfaceTexture ?: SurfaceTexture(0).also {
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surfaceTexture = it
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})
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startPreview()
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setPreviewCallback { bytes, _ ->
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if (process?.isComplete == false)
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return@setPreviewCallback
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val rotation = getRotation(context, cameraID)
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val image = InputImage.fromByteArray(bytes, 640, 480, rotation, InputImage.IMAGE_FORMAT_NV21)
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process = detector.process(image)
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.addOnSuccessListener(callback)
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}
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}
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}
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fun closeCamera() {
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camera?.setPreviewCallback(null)
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camera?.stopPreview()
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surfaceTexture?.release()
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surfaceTexture = null
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camera?.release()
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camera = null
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} |