diff options
Diffstat (limited to 'mobile/android/exoplayer2/src/main/java/org/mozilla/thirdparty/com/google/android/exoplayer2/offline/DefaultDownloaderFactory.java')
-rw-r--r-- | mobile/android/exoplayer2/src/main/java/org/mozilla/thirdparty/com/google/android/exoplayer2/offline/DefaultDownloaderFactory.java | 119 |
1 files changed, 119 insertions, 0 deletions
diff --git a/mobile/android/exoplayer2/src/main/java/org/mozilla/thirdparty/com/google/android/exoplayer2/offline/DefaultDownloaderFactory.java b/mobile/android/exoplayer2/src/main/java/org/mozilla/thirdparty/com/google/android/exoplayer2/offline/DefaultDownloaderFactory.java new file mode 100644 index 0000000000..6391af8a95 --- /dev/null +++ b/mobile/android/exoplayer2/src/main/java/org/mozilla/thirdparty/com/google/android/exoplayer2/offline/DefaultDownloaderFactory.java @@ -0,0 +1,119 @@ +/* + * Copyright (C) 2018 The Android Open Source Project + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +package org.mozilla.thirdparty.com.google.android.exoplayer2.offline; + +import android.net.Uri; +import androidx.annotation.Nullable; +import java.lang.reflect.Constructor; +import java.util.List; + +/** + * Default {@link DownloaderFactory}, supporting creation of progressive, DASH, HLS and + * SmoothStreaming downloaders. Note that for the latter three, the corresponding library module + * must be built into the application. + */ +public class DefaultDownloaderFactory implements DownloaderFactory { + + @Nullable private static final Constructor<? extends Downloader> DASH_DOWNLOADER_CONSTRUCTOR; + @Nullable private static final Constructor<? extends Downloader> HLS_DOWNLOADER_CONSTRUCTOR; + @Nullable private static final Constructor<? extends Downloader> SS_DOWNLOADER_CONSTRUCTOR; + + static { + Constructor<? extends Downloader> dashDownloaderConstructor = null; + try { + // LINT.IfChange + dashDownloaderConstructor = + getDownloaderConstructor( + Class.forName("com.google.android.exoplayer2.source.dash.offline.DashDownloader")); + // LINT.ThenChange(../../../../../../../../proguard-rules.txt) + } catch (ClassNotFoundException e) { + // Expected if the app was built without the DASH module. + } + DASH_DOWNLOADER_CONSTRUCTOR = dashDownloaderConstructor; + Constructor<? extends Downloader> hlsDownloaderConstructor = null; + try { + // LINT.IfChange + hlsDownloaderConstructor = + getDownloaderConstructor( + Class.forName("com.google.android.exoplayer2.source.hls.offline.HlsDownloader")); + // LINT.ThenChange(../../../../../../../../proguard-rules.txt) + } catch (ClassNotFoundException e) { + // Expected if the app was built without the HLS module. + } + HLS_DOWNLOADER_CONSTRUCTOR = hlsDownloaderConstructor; + Constructor<? extends Downloader> ssDownloaderConstructor = null; + try { + // LINT.IfChange + ssDownloaderConstructor = + getDownloaderConstructor( + Class.forName( + "com.google.android.exoplayer2.source.smoothstreaming.offline.SsDownloader")); + // LINT.ThenChange(../../../../../../../../proguard-rules.txt) + } catch (ClassNotFoundException e) { + // Expected if the app was built without the SmoothStreaming module. + } + SS_DOWNLOADER_CONSTRUCTOR = ssDownloaderConstructor; + } + + private final DownloaderConstructorHelper downloaderConstructorHelper; + + /** @param downloaderConstructorHelper A helper for instantiating downloaders. */ + public DefaultDownloaderFactory(DownloaderConstructorHelper downloaderConstructorHelper) { + this.downloaderConstructorHelper = downloaderConstructorHelper; + } + + @Override + public Downloader createDownloader(DownloadRequest request) { + switch (request.type) { + case DownloadRequest.TYPE_PROGRESSIVE: + return new ProgressiveDownloader( + request.uri, request.customCacheKey, downloaderConstructorHelper); + case DownloadRequest.TYPE_DASH: + return createDownloader(request, DASH_DOWNLOADER_CONSTRUCTOR); + case DownloadRequest.TYPE_HLS: + return createDownloader(request, HLS_DOWNLOADER_CONSTRUCTOR); + case DownloadRequest.TYPE_SS: + return createDownloader(request, SS_DOWNLOADER_CONSTRUCTOR); + default: + throw new IllegalArgumentException("Unsupported type: " + request.type); + } + } + + private Downloader createDownloader( + DownloadRequest request, @Nullable Constructor<? extends Downloader> constructor) { + if (constructor == null) { + throw new IllegalStateException("Module missing for: " + request.type); + } + try { + return constructor.newInstance(request.uri, request.streamKeys, downloaderConstructorHelper); + } catch (Exception e) { + throw new RuntimeException("Failed to instantiate downloader for: " + request.type, e); + } + } + + // LINT.IfChange + private static Constructor<? extends Downloader> getDownloaderConstructor(Class<?> clazz) { + try { + return clazz + .asSubclass(Downloader.class) + .getConstructor(Uri.class, List.class, DownloaderConstructorHelper.class); + } catch (NoSuchMethodException e) { + // The downloader is present, but the expected constructor is missing. + throw new RuntimeException("Downloader constructor missing", e); + } + } + // LINT.ThenChange(../../../../../../../../proguard-rules.txt) +} |