CoilBitmapLoader.kt
86 lines · 3.1 KB
Changed in: 0.5.0
| 1 | package dev.stave.playback |
| 2 | |
| 3 | import android.content.Context |
| 4 | import android.graphics.Bitmap |
| 5 | import android.graphics.BitmapFactory |
| 6 | import android.net.Uri |
| 7 | import androidx.media3.common.util.UnstableApi |
| 8 | import androidx.media3.session.BitmapLoader |
| 9 | import coil3.ImageLoader |
| 10 | import coil3.SingletonImageLoader |
| 11 | import coil3.request.ImageRequest |
| 12 | import coil3.request.SuccessResult |
| 13 | import coil3.request.allowHardware |
| 14 | import coil3.size.Size |
| 15 | import coil3.toBitmap |
| 16 | import com.google.common.util.concurrent.Futures |
| 17 | import com.google.common.util.concurrent.ListenableFuture |
| 18 | import com.google.common.util.concurrent.SettableFuture |
| 19 | import kotlinx.coroutines.CoroutineScope |
| 20 | import kotlinx.coroutines.Dispatchers |
| 21 | import kotlinx.coroutines.SupervisorJob |
| 22 | import kotlinx.coroutines.launch |
| 23 | |
| 24 | /** |
| 25 | * BitmapLoader that uses Coil to fetch artwork at a defined target |
| 26 | * resolution. Replacing the default DataSourceBitmapLoader produces |
| 27 | * consistently large bitmaps for Auto's now-playing card and the |
| 28 | * system media notification — the default decodes whatever resolution |
| 29 | * the URI happens to return, which for local content://albumart can |
| 30 | * be a 256-px thumbnail and for UPnP varies wildly by server. |
| 31 | * |
| 32 | * Target [TARGET_SIZE_PX] is 1024x1024 — the largest size Auto's |
| 33 | * MediaPlaybackTemplate will display before downscaling, and a sane |
| 34 | * upper bound for memory usage when caching. |
| 35 | */ |
| 36 | @UnstableApi |
| 37 | class CoilBitmapLoader( |
| 38 | private val context: Context, |
| 39 | ) : BitmapLoader { |
| 40 | |
| 41 | private val scope = CoroutineScope(SupervisorJob() + Dispatchers.IO) |
| 42 | private val loader: ImageLoader |
| 43 | get() = SingletonImageLoader.get(context) |
| 44 | |
| 45 | override fun supportsMimeType(mimeType: String): Boolean { |
| 46 | return mimeType.startsWith("image/") |
| 47 | } |
| 48 | |
| 49 | override fun decodeBitmap(data: ByteArray): ListenableFuture<Bitmap> { |
| 50 | val future = SettableFuture.create<Bitmap>() |
| 51 | scope.launch { |
| 52 | try { |
| 53 | val bmp = BitmapFactory.decodeByteArray(data, 0, data.size) |
| 54 | if (bmp != null) future.set(bmp) |
| 55 | else future.setException(IllegalArgumentException("Failed to decode bitmap from ${data.size} bytes")) |
| 56 | } catch (t: Throwable) { |
| 57 | future.setException(t) |
| 58 | } |
| 59 | } |
| 60 | return future |
| 61 | } |
| 62 | |
| 63 | override fun loadBitmap(uri: Uri): ListenableFuture<Bitmap> { |
| 64 | val future = SettableFuture.create<Bitmap>() |
| 65 | scope.launch { |
| 66 | try { |
| 67 | val request = ImageRequest.Builder(context) |
| 68 | .data(uri) |
| 69 | .size(Size(TARGET_SIZE_PX, TARGET_SIZE_PX)) |
| 70 | .allowHardware(false) |
| 71 | .build() |
| 72 | when (val result = loader.execute(request)) { |
| 73 | is SuccessResult -> future.set(result.image.toBitmap()) |
| 74 | else -> future.setException(IllegalStateException("Coil failed for $uri")) |
| 75 | } |
| 76 | } catch (t: Throwable) { |
| 77 | future.setException(t) |
| 78 | } |
| 79 | } |
| 80 | return future |
| 81 | } |
| 82 | |
| 83 | companion object { |
| 84 | const val TARGET_SIZE_PX = 1024 |
| 85 | } |
| 86 | } |