feat(mobile): platform thumbnail api (#20910)

mobile/android/app/CMakeLists.txt

@@ -0,0 +1,10 @@
+cmake_minimum_required(VERSION 3.12)
+
+set(CMAKE_C_STANDARD 17)
+set(CMAKE_C_STANDARD_REQUIRED ON)
+
+project(native_buffer LANGUAGES C)
+
+add_library(native_buffer SHARED
+    src/main/cpp/native_buffer.c
+)

mobile/android/app/build.gradle

@@ -83,6 +83,12 @@ android {
     }
   }
   namespace 'app.alextran.immich'
+
+  externalNativeBuild {
+    cmake {
+      path "CMakeLists.txt"
+    }
+  }
 }
 
 flutter {

mobile/android/app/src/main/cpp/native_buffer.c

@@ -0,0 +1,40 @@
+#include <jni.h>
+#include <stdlib.h>
+
+JNIEXPORT jlong JNICALL
+Java_app_alextran_immich_images_ThumbnailsImpl_00024Companion_allocateNative(
+        JNIEnv *env, jclass clazz, jint size) {
+    void *ptr = malloc(size);
+    return (jlong) ptr;
+}
+
+JNIEXPORT jlong JNICALL
+Java_app_alextran_immich_images_ThumbnailsImpl_allocateNative(
+        JNIEnv *env, jclass clazz, jint size) {
+    void *ptr = malloc(size);
+    return (jlong) ptr;
+}
+
+JNIEXPORT void JNICALL
+Java_app_alextran_immich_images_ThumbnailsImpl_00024Companion_freeNative(
+        JNIEnv *env, jclass clazz, jlong address) {
+    free((void *) address);
+}
+
+JNIEXPORT void JNICALL
+Java_app_alextran_immich_images_ThumbnailsImpl_freeNative(
+        JNIEnv *env, jclass clazz, jlong address) {
+    free((void *) address);
+}
+
+JNIEXPORT jobject JNICALL
+Java_app_alextran_immich_images_ThumbnailsImpl_00024Companion_wrapAsBuffer(
+        JNIEnv *env, jclass clazz, jlong address, jint capacity) {
+    return (*env)->NewDirectByteBuffer(env, (void *) address, capacity);
+}
+
+JNIEXPORT jobject JNICALL
+Java_app_alextran_immich_images_ThumbnailsImpl_wrapAsBuffer(
+        JNIEnv *env, jclass clazz, jlong address, jint capacity) {
+    return (*env)->NewDirectByteBuffer(env, (void *) address, capacity);
+}

mobile/android/app/src/main/kotlin/app/alextran/immich/AppGlideModule.kt

@@ -1,7 +1,20 @@
 package app.alextran.immich
 
+import android.content.Context
+import com.bumptech.glide.GlideBuilder
 import com.bumptech.glide.annotation.GlideModule
+import com.bumptech.glide.load.engine.bitmap_recycle.BitmapPoolAdapter
+import com.bumptech.glide.load.engine.cache.DiskCacheAdapter
+import com.bumptech.glide.load.engine.cache.MemoryCacheAdapter
 import com.bumptech.glide.module.AppGlideModule
 
 @GlideModule
-class AppGlideModule : AppGlideModule()
+class AppGlideModule : AppGlideModule() {
+  override fun applyOptions(context: Context, builder: GlideBuilder) {
+    super.applyOptions(context, builder)
+    // disable caching as this is already done on the Flutter side
+    builder.setMemoryCache(MemoryCacheAdapter())
+    builder.setDiskCache(DiskCacheAdapter.Factory())
+    builder.setBitmapPool(BitmapPoolAdapter())
+  }
+}

mobile/android/app/src/main/kotlin/app/alextran/immich/MainActivity.kt

@@ -3,6 +3,8 @@ package app.alextran.immich
 import android.os.Build
 import android.os.ext.SdkExtensions
 import androidx.annotation.NonNull
+import app.alextran.immich.images.ThumbnailApi
+import app.alextran.immich.images.ThumbnailsImpl
 import app.alextran.immich.sync.NativeSyncApi
 import app.alextran.immich.sync.NativeSyncApiImpl26
 import app.alextran.immich.sync.NativeSyncApiImpl30
@@ -22,6 +24,7 @@ class MainActivity : FlutterFragmentActivity() {
       } else {
         NativeSyncApiImpl30(this)
       }
-    NativeSyncApi.setUp(flutterEngine.dartExecutor.binaryMessenger, nativeSyncApiImpl)
+      NativeSyncApi.setUp(flutterEngine.dartExecutor.binaryMessenger, nativeSyncApiImpl)
+      ThumbnailApi.setUp(flutterEngine.dartExecutor.binaryMessenger, ThumbnailsImpl(this))
   }
 }

mobile/android/app/src/main/kotlin/app/alextran/immich/images/ThumbHash.java

@@ -0,0 +1,164 @@
+package app.alextran.immich.images;
+
+// Copyright (c) 2023 Evan Wallace
+// Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+// The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+import java.nio.ByteBuffer;
+
+// modified to use native allocations
+public final class ThumbHash {
+  /**
+   * Decodes a ThumbHash to an RGBA image. RGB is not be premultiplied by A.
+   *
+   * @param hash The bytes of the ThumbHash.
+   * @return The width, height, and pixels of the rendered placeholder image.
+   */
+  public static Image thumbHashToRGBA(byte[] hash) {
+    // Read the constants
+    int header24 = (hash[0] & 255) | ((hash[1] & 255) << 8) | ((hash[2] & 255) << 16);
+    int header16 = (hash[3] & 255) | ((hash[4] & 255) << 8);
+    float l_dc = (float) (header24 & 63) / 63.0f;
+    float p_dc = (float) ((header24 >> 6) & 63) / 31.5f - 1.0f;
+    float q_dc = (float) ((header24 >> 12) & 63) / 31.5f - 1.0f;
+    float l_scale = (float) ((header24 >> 18) & 31) / 31.0f;
+    boolean hasAlpha = (header24 >> 23) != 0;
+    float p_scale = (float) ((header16 >> 3) & 63) / 63.0f;
+    float q_scale = (float) ((header16 >> 9) & 63) / 63.0f;
+    boolean isLandscape = (header16 >> 15) != 0;
+    int lx = Math.max(3, isLandscape ? hasAlpha ? 5 : 7 : header16 & 7);
+    int ly = Math.max(3, isLandscape ? header16 & 7 : hasAlpha ? 5 : 7);
+    float a_dc = hasAlpha ? (float) (hash[5] & 15) / 15.0f : 1.0f;
+    float a_scale = (float) ((hash[5] >> 4) & 15) / 15.0f;
+
+    // Read the varying factors (boost saturation by 1.25x to compensate for quantization)
+    int ac_start = hasAlpha ? 6 : 5;
+    int ac_index = 0;
+    Channel l_channel = new Channel(lx, ly);
+    Channel p_channel = new Channel(3, 3);
+    Channel q_channel = new Channel(3, 3);
+    Channel a_channel = null;
+    ac_index = l_channel.decode(hash, ac_start, ac_index, l_scale);
+    ac_index = p_channel.decode(hash, ac_start, ac_index, p_scale * 1.25f);
+    ac_index = q_channel.decode(hash, ac_start, ac_index, q_scale * 1.25f);
+    if (hasAlpha) {
+      a_channel = new Channel(5, 5);
+      a_channel.decode(hash, ac_start, ac_index, a_scale);
+    }
+    float[] l_ac = l_channel.ac;
+    float[] p_ac = p_channel.ac;
+    float[] q_ac = q_channel.ac;
+    float[] a_ac = hasAlpha ? a_channel.ac : null;
+
+    // Decode using the DCT into RGB
+    float ratio = thumbHashToApproximateAspectRatio(hash);
+    int w = Math.round(ratio > 1.0f ? 32.0f : 32.0f * ratio);
+    int h = Math.round(ratio > 1.0f ? 32.0f / ratio : 32.0f);
+    int size = w * h * 4;
+    long pointer = ThumbnailsImpl.allocateNative(size);
+    ByteBuffer rgba = ThumbnailsImpl.wrapAsBuffer(pointer, size);
+    int cx_stop = Math.max(lx, hasAlpha ? 5 : 3);
+    int cy_stop = Math.max(ly, hasAlpha ? 5 : 3);
+    float[] fx = new float[cx_stop];
+    float[] fy = new float[cy_stop];
+    for (int y = 0, i = 0; y < h; y++) {
+      for (int x = 0; x < w; x++, i += 4) {
+        float l = l_dc, p = p_dc, q = q_dc, a = a_dc;
+
+        // Precompute the coefficients
+        for (int cx = 0; cx < cx_stop; cx++)
+          fx[cx] = (float) Math.cos(Math.PI / w * (x + 0.5f) * cx);
+        for (int cy = 0; cy < cy_stop; cy++)
+          fy[cy] = (float) Math.cos(Math.PI / h * (y + 0.5f) * cy);
+
+        // Decode L
+        for (int cy = 0, j = 0; cy < ly; cy++) {
+          float fy2 = fy[cy] * 2.0f;
+          for (int cx = cy > 0 ? 0 : 1; cx * ly < lx * (ly - cy); cx++, j++)
+            l += l_ac[j] * fx[cx] * fy2;
+        }
+
+        // Decode P and Q
+        for (int cy = 0, j = 0; cy < 3; cy++) {
+          float fy2 = fy[cy] * 2.0f;
+          for (int cx = cy > 0 ? 0 : 1; cx < 3 - cy; cx++, j++) {
+            float f = fx[cx] * fy2;
+            p += p_ac[j] * f;
+            q += q_ac[j] * f;
+          }
+        }
+
+        // Decode A
+        if (hasAlpha)
+          for (int cy = 0, j = 0; cy < 5; cy++) {
+            float fy2 = fy[cy] * 2.0f;
+            for (int cx = cy > 0 ? 0 : 1; cx < 5 - cy; cx++, j++)
+              a += a_ac[j] * fx[cx] * fy2;
+          }
+
+        // Convert to RGB
+        float b = l - 2.0f / 3.0f * p;
+        float r = (3.0f * l - b + q) / 2.0f;
+        float g = r - q;
+        rgba.put(i, (byte) Math.max(0, Math.round(255.0f * Math.min(1, r))));
+        rgba.put(i + 1, (byte) Math.max(0, Math.round(255.0f * Math.min(1, g))));
+        rgba.put(i + 2, (byte) Math.max(0, Math.round(255.0f * Math.min(1, b))));
+        rgba.put(i + 3, (byte) Math.max(0, Math.round(255.0f * Math.min(1, a))));
+      }
+    }
+    return new Image(w, h, pointer);
+  }
+
+  /**
+   * Extracts the approximate aspect ratio of the original image.
+   *
+   * @param hash The bytes of the ThumbHash.
+   * @return The approximate aspect ratio (i.e. width / height).
+   */
+  public static float thumbHashToApproximateAspectRatio(byte[] hash) {
+    byte header = hash[3];
+    boolean hasAlpha = (hash[2] & 0x80) != 0;
+    boolean isLandscape = (hash[4] & 0x80) != 0;
+    int lx = isLandscape ? hasAlpha ? 5 : 7 : header & 7;
+    int ly = isLandscape ? header & 7 : hasAlpha ? 5 : 7;
+    return (float) lx / (float) ly;
+  }
+
+  public static final class Image {
+    public int width;
+    public int height;
+    public long pointer;
+
+    public Image(int width, int height, long pointer) {
+      this.width = width;
+      this.height = height;
+      this.pointer = pointer;
+    }
+  }
+
+  private static final class Channel {
+    int nx;
+    int ny;
+    float[] ac;
+
+    Channel(int nx, int ny) {
+      this.nx = nx;
+      this.ny = ny;
+      int n = 0;
+      for (int cy = 0; cy < ny; cy++)
+        for (int cx = cy > 0 ? 0 : 1; cx * ny < nx * (ny - cy); cx++)
+          n++;
+      ac = new float[n];
+    }
+
+    int decode(byte[] hash, int start, int index, float scale) {
+      for (int i = 0; i < ac.length; i++) {
+        int data = hash[start + (index >> 1)] >> ((index & 1) << 2);
+        ac[i] = ((float) (data & 15) / 7.5f - 1.0f) * scale;
+        index++;
+      }
+      return index;
+    }
+  }
+}

mobile/android/app/src/main/kotlin/app/alextran/immich/images/Thumbnails.g.kt

@@ -0,0 +1,139 @@
+// Autogenerated from Pigeon (v26.0.0), do not edit directly.
+// See also: https://pub.dev/packages/pigeon
+@file:Suppress("UNCHECKED_CAST", "ArrayInDataClass")
+
+package app.alextran.immich.images
+
+import android.util.Log
+import io.flutter.plugin.common.BasicMessageChannel
+import io.flutter.plugin.common.BinaryMessenger
+import io.flutter.plugin.common.EventChannel
+import io.flutter.plugin.common.MessageCodec
+import io.flutter.plugin.common.StandardMethodCodec
+import io.flutter.plugin.common.StandardMessageCodec
+import java.io.ByteArrayOutputStream
+import java.nio.ByteBuffer
+private object ThumbnailsPigeonUtils {
+
+  fun wrapResult(result: Any?): List<Any?> {
+    return listOf(result)
+  }
+
+  fun wrapError(exception: Throwable): List<Any?> {
+    return if (exception is FlutterError) {
+      listOf(
+        exception.code,
+        exception.message,
+        exception.details
+      )
+    } else {
+      listOf(
+        exception.javaClass.simpleName,
+        exception.toString(),
+        "Cause: " + exception.cause + ", Stacktrace: " + Log.getStackTraceString(exception)
+      )
+    }
+  }
+}
+
+/**
+ * Error class for passing custom error details to Flutter via a thrown PlatformException.
+ * @property code The error code.
+ * @property message The error message.
+ * @property details The error details. Must be a datatype supported by the api codec.
+ */
+class FlutterError (
+  val code: String,
+  override val message: String? = null,
+  val details: Any? = null
+) : Throwable()
+private open class ThumbnailsPigeonCodec : StandardMessageCodec() {
+  override fun readValueOfType(type: Byte, buffer: ByteBuffer): Any? {
+    return     super.readValueOfType(type, buffer)
+  }
+  override fun writeValue(stream: ByteArrayOutputStream, value: Any?)   {
+    super.writeValue(stream, value)
+  }
+}
+
+
+/** Generated interface from Pigeon that represents a handler of messages from Flutter. */
+interface ThumbnailApi {
+  fun requestImage(assetId: String, requestId: Long, width: Long, height: Long, isVideo: Boolean, callback: (Result<Map<String, Long>>) -> Unit)
+  fun cancelImageRequest(requestId: Long)
+  fun getThumbhash(thumbhash: String, callback: (Result<Map<String, Long>>) -> Unit)
+
+  companion object {
+    /** The codec used by ThumbnailApi. */
+    val codec: MessageCodec<Any?> by lazy {
+      ThumbnailsPigeonCodec()
+    }
+    /** Sets up an instance of `ThumbnailApi` to handle messages through the `binaryMessenger`. */
+    @JvmOverloads
+    fun setUp(binaryMessenger: BinaryMessenger, api: ThumbnailApi?, messageChannelSuffix: String = "") {
+      val separatedMessageChannelSuffix = if (messageChannelSuffix.isNotEmpty()) ".$messageChannelSuffix" else ""
+      run {
+        val channel = BasicMessageChannel<Any?>(binaryMessenger, "dev.flutter.pigeon.immich_mobile.ThumbnailApi.requestImage$separatedMessageChannelSuffix", codec)
+        if (api != null) {
+          channel.setMessageHandler { message, reply ->
+            val args = message as List<Any?>
+            val assetIdArg = args[0] as String
+            val requestIdArg = args[1] as Long
+            val widthArg = args[2] as Long
+            val heightArg = args[3] as Long
+            val isVideoArg = args[4] as Boolean
+            api.requestImage(assetIdArg, requestIdArg, widthArg, heightArg, isVideoArg) { result: Result<Map<String, Long>> ->
+              val error = result.exceptionOrNull()
+              if (error != null) {
+                reply.reply(ThumbnailsPigeonUtils.wrapError(error))
+              } else {
+                val data = result.getOrNull()
+                reply.reply(ThumbnailsPigeonUtils.wrapResult(data))
+              }
+            }
+          }
+        } else {
+          channel.setMessageHandler(null)
+        }
+      }
+      run {
+        val channel = BasicMessageChannel<Any?>(binaryMessenger, "dev.flutter.pigeon.immich_mobile.ThumbnailApi.cancelImageRequest$separatedMessageChannelSuffix", codec)
+        if (api != null) {
+          channel.setMessageHandler { message, reply ->
+            val args = message as List<Any?>
+            val requestIdArg = args[0] as Long
+            val wrapped: List<Any?> = try {
+              api.cancelImageRequest(requestIdArg)
+              listOf(null)
+            } catch (exception: Throwable) {
+              ThumbnailsPigeonUtils.wrapError(exception)
+            }
+            reply.reply(wrapped)
+          }
+        } else {
+          channel.setMessageHandler(null)
+        }
+      }
+      run {
+        val channel = BasicMessageChannel<Any?>(binaryMessenger, "dev.flutter.pigeon.immich_mobile.ThumbnailApi.getThumbhash$separatedMessageChannelSuffix", codec)
+        if (api != null) {
+          channel.setMessageHandler { message, reply ->
+            val args = message as List<Any?>
+            val thumbhashArg = args[0] as String
+            api.getThumbhash(thumbhashArg) { result: Result<Map<String, Long>> ->
+              val error = result.exceptionOrNull()
+              if (error != null) {
+                reply.reply(ThumbnailsPigeonUtils.wrapError(error))
+              } else {
+                val data = result.getOrNull()
+                reply.reply(ThumbnailsPigeonUtils.wrapResult(data))
+              }
+            }
+          }
+        } else {
+          channel.setMessageHandler(null)
+        }
+      }
+    }
+  }
+}

mobile/android/app/src/main/kotlin/app/alextran/immich/images/ThumbnailsImpl.kt

@@ -0,0 +1,230 @@
+package app.alextran.immich.images
+
+import android.content.ContentResolver
+import android.content.ContentUris
+import android.content.Context
+import android.graphics.*
+import android.net.Uri
+import android.os.Build
+import android.os.CancellationSignal
+import android.os.OperationCanceledException
+import android.provider.MediaStore
+import android.provider.MediaStore.Images
+import android.provider.MediaStore.Video
+import android.util.Size
+import java.nio.ByteBuffer
+import kotlin.math.*
+import java.util.concurrent.Executors
+import com.bumptech.glide.Glide
+import com.bumptech.glide.Priority
+import com.bumptech.glide.load.DecodeFormat
+import java.util.Base64
+import java.util.HashMap
+import java.util.concurrent.CancellationException
+import java.util.concurrent.ConcurrentHashMap
+import java.util.concurrent.Future
+
+data class Request(
+  val taskFuture: Future<*>,
+  val cancellationSignal: CancellationSignal,
+  val callback: (Result<Map<String, Long>>) -> Unit
+)
+
+class ThumbnailsImpl(context: Context) : ThumbnailApi {
+  private val ctx: Context = context.applicationContext
+  private val resolver: ContentResolver = ctx.contentResolver
+  private val requestThread = Executors.newSingleThreadExecutor()
+  private val threadPool =
+    Executors.newFixedThreadPool(Runtime.getRuntime().availableProcessors() / 2 + 1)
+  private val requestMap = ConcurrentHashMap<Long, Request>()
+
+  companion object {
+    val CANCELLED = Result.success<Map<String, Long>>(mapOf())
+    val OPTIONS = BitmapFactory.Options().apply { inPreferredConfig = Bitmap.Config.ARGB_8888 }
+
+    init {
+      System.loadLibrary("native_buffer")
+    }
+
+    @JvmStatic
+    external fun allocateNative(size: Int): Long
+
+    @JvmStatic
+    external fun freeNative(pointer: Long)
+
+    @JvmStatic
+    external fun wrapAsBuffer(address: Long, capacity: Int): ByteBuffer
+  }
+
+  override fun getThumbhash(thumbhash: String, callback: (Result<Map<String, Long>>) -> Unit) {
+    threadPool.execute {
+      try {
+        val bytes = Base64.getDecoder().decode(thumbhash)
+        val image = ThumbHash.thumbHashToRGBA(bytes)
+        val res = mapOf(
+          "pointer" to image.pointer,
+          "width" to image.width.toLong(),
+          "height" to image.height.toLong()
+        )
+        callback(Result.success(res))
+      } catch (e: Exception) {
+        callback(Result.failure(e))
+      }
+    }
+  }
+
+  override fun requestImage(
+    assetId: String,
+    requestId: Long,
+    width: Long,
+    height: Long,
+    isVideo: Boolean,
+    callback: (Result<Map<String, Long>>) -> Unit
+  ) {
+    val signal = CancellationSignal()
+    val task = threadPool.submit {
+      try {
+        getThumbnailBufferInternal(assetId, width, height, isVideo, callback, signal)
+      } catch (e: Exception) {
+        when (e) {
+          is OperationCanceledException -> callback(CANCELLED)
+          is CancellationException -> callback(CANCELLED)
+          else -> callback(Result.failure(e))
+        }
+      } finally {
+        requestMap.remove(requestId)
+      }
+    }
+    val request = Request(task, signal, callback)
+    requestMap[requestId] = request
+  }
+
+  override fun cancelImageRequest(requestId: Long) {
+    val request = requestMap.remove(requestId) ?: return
+    request.taskFuture.cancel(false)
+    request.cancellationSignal.cancel()
+    if (request.taskFuture.isCancelled) {
+      requestThread.execute {
+        try {
+          request.callback(CANCELLED)
+        } catch (_: Exception) {
+        }
+      }
+    }
+  }
+
+  private fun getThumbnailBufferInternal(
+    assetId: String,
+    width: Long,
+    height: Long,
+    isVideo: Boolean,
+    callback: (Result<Map<String, Long>>) -> Unit,
+    signal: CancellationSignal
+  ) {
+    signal.throwIfCanceled()
+    val targetWidth = width.toInt()
+    val targetHeight = height.toInt()
+    val id = assetId.toLong()
+
+    signal.throwIfCanceled()
+    val bitmap = if (isVideo) {
+      decodeVideoThumbnail(id, targetWidth, targetHeight, signal)
+    } else {
+      decodeImage(id, targetWidth, targetHeight, signal)
+    }
+
+    processBitmap(bitmap, callback, signal)
+  }
+
+  private fun processBitmap(
+    bitmap: Bitmap, callback: (Result<Map<String, Long>>) -> Unit, signal: CancellationSignal
+  ) {
+    signal.throwIfCanceled()
+    val actualWidth = bitmap.width
+    val actualHeight = bitmap.height
+
+    val size = actualWidth * actualHeight * 4
+    val pointer = allocateNative(size)
+
+    try {
+      signal.throwIfCanceled()
+      val buffer = wrapAsBuffer(pointer, size)
+      bitmap.copyPixelsToBuffer(buffer)
+      bitmap.recycle()
+      signal.throwIfCanceled()
+      val res = mapOf(
+        "pointer" to pointer,
+        "width" to actualWidth.toLong(),
+        "height" to actualHeight.toLong()
+      )
+      callback(Result.success(res))
+    } catch (e: Exception) {
+      freeNative(pointer)
+      callback(if (e is OperationCanceledException) CANCELLED else Result.failure(e))
+    }
+  }
+
+  private fun decodeImage(
+    id: Long, targetWidth: Int, targetHeight: Int, signal: CancellationSignal
+  ): Bitmap {
+    signal.throwIfCanceled()
+    val uri = ContentUris.withAppendedId(Images.Media.EXTERNAL_CONTENT_URI, id)
+    if (targetHeight > 768 || targetWidth > 768) {
+      return decodeSource(uri, targetWidth, targetHeight, signal)
+    }
+
+    return if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
+      resolver.loadThumbnail(uri, Size(targetWidth, targetHeight), signal)
+    } else {
+      signal.setOnCancelListener { Images.Thumbnails.cancelThumbnailRequest(resolver, id) }
+      Images.Thumbnails.getThumbnail(resolver, id, Images.Thumbnails.MINI_KIND, OPTIONS)
+    }
+  }
+
+  private fun decodeVideoThumbnail(
+    id: Long, targetWidth: Int, targetHeight: Int, signal: CancellationSignal
+  ): Bitmap {
+    signal.throwIfCanceled()
+    return if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
+      val uri = ContentUris.withAppendedId(Video.Media.EXTERNAL_CONTENT_URI, id)
+      resolver.loadThumbnail(uri, Size(targetWidth, targetHeight), signal)
+    } else {
+      signal.setOnCancelListener { Video.Thumbnails.cancelThumbnailRequest(resolver, id) }
+      Video.Thumbnails.getThumbnail(resolver, id, Video.Thumbnails.MINI_KIND, OPTIONS)
+    }
+  }
+
+  private fun decodeSource(
+    uri: Uri, targetWidth: Int, targetHeight: Int, signal: CancellationSignal
+  ): Bitmap {
+    signal.throwIfCanceled()
+    return if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
+      val source = ImageDecoder.createSource(resolver, uri)
+      signal.throwIfCanceled()
+      ImageDecoder.decodeBitmap(source) { decoder, info, _ ->
+        val sampleSize =
+          getSampleSize(info.size.width, info.size.height, targetWidth, targetHeight)
+        decoder.setTargetSampleSize(sampleSize)
+        decoder.allocator = ImageDecoder.ALLOCATOR_SOFTWARE
+        decoder.setTargetColorSpace(ColorSpace.get(ColorSpace.Named.SRGB))
+      }
+    } else {
+      val ref = Glide.with(ctx).asBitmap().priority(Priority.IMMEDIATE).load(uri)
+        .disallowHardwareConfig().format(DecodeFormat.PREFER_ARGB_8888)
+        .submit(targetWidth, targetHeight)
+      signal.setOnCancelListener { Glide.with(ctx).clear(ref) }
+      ref.get()
+    }
+  }
+
+  private fun getSampleSize(fullWidth: Int, fullHeight: Int, reqWidth: Int, reqHeight: Int): Int {
+    return 1 shl max(
+      0, floor(
+        min(
+          log2(fullWidth / (2.0 * reqWidth)),
+          log2(fullHeight / (2.0 * reqHeight)),
+        )
+      ).toInt()
+    )
+  }
+}