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Player.Listener impl, remove `@VisibleForTesting isInitialized…
…`. (flutter#6922) Similar to flutter#6908, as part of flutter/flutter#148417. I'm working on re-landing flutter#6456, this time without using the `ActivityAware` interface (see flutter/flutter#148417). As part of that work, I'll need to better control the `ExoPlayer` lifecycle and save/restore internal state. In this PR, I've removed the concept of the class being "initialized" or not - the only thing "initialized" means is "for a given instance of `ExoPlayer`, has received the `'initialized'` event. As a result I removed the quasi-public API that was used for testing only and replaced it with observing what the real production instance does (`Player.STATE_READY`). After this PR, I'll likely do one more pass around the constructors - the constructor that takes an `ExoPlayer` that is marked `@VisibleForTesting` _also_ doesn't make sense once we'll support suspending/resuming video players, so it will need to get reworked (probably into taking a factory method).
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..._android/android/src/main/java/io/flutter/plugins/videoplayer/ExoPlayerEventListener.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,101 @@ | ||
| // Copyright 2013 The Flutter Authors. All rights reserved. | ||
| // Use of this source code is governed by a BSD-style license that can be | ||
| // found in the LICENSE file. | ||
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| package io.flutter.plugins.videoplayer; | ||
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| import androidx.annotation.NonNull; | ||
| import androidx.media3.common.PlaybackException; | ||
| import androidx.media3.common.Player; | ||
| import androidx.media3.common.VideoSize; | ||
| import androidx.media3.exoplayer.ExoPlayer; | ||
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| final class ExoPlayerEventListener implements Player.Listener { | ||
| private final ExoPlayer exoPlayer; | ||
| private final VideoPlayerCallbacks events; | ||
| private boolean isBuffering = false; | ||
| private boolean isInitialized = false; | ||
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| ExoPlayerEventListener(ExoPlayer exoPlayer, VideoPlayerCallbacks events) { | ||
| this.exoPlayer = exoPlayer; | ||
| this.events = events; | ||
| } | ||
|
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| private void setBuffering(boolean buffering) { | ||
| if (isBuffering == buffering) { | ||
| return; | ||
| } | ||
| isBuffering = buffering; | ||
| if (buffering) { | ||
| events.onBufferingStart(); | ||
| } else { | ||
| events.onBufferingEnd(); | ||
| } | ||
| } | ||
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| @SuppressWarnings("SuspiciousNameCombination") | ||
| private void sendInitialized() { | ||
| if (isInitialized) { | ||
| return; | ||
| } | ||
| isInitialized = true; | ||
| VideoSize videoSize = exoPlayer.getVideoSize(); | ||
| int rotationCorrection = 0; | ||
| int width = videoSize.width; | ||
| int height = videoSize.height; | ||
| if (width != 0 && height != 0) { | ||
| int rotationDegrees = videoSize.unappliedRotationDegrees; | ||
| // Switch the width/height if video was taken in portrait mode | ||
| if (rotationDegrees == 90 || rotationDegrees == 270) { | ||
| width = videoSize.height; | ||
| height = videoSize.width; | ||
| } | ||
| // Rotating the video with ExoPlayer does not seem to be possible with a Surface, | ||
| // so inform the Flutter code that the widget needs to be rotated to prevent | ||
| // upside-down playback for videos with rotationDegrees of 180 (other orientations work | ||
| // correctly without correction). | ||
| if (rotationDegrees == 180) { | ||
| rotationCorrection = rotationDegrees; | ||
| } | ||
| } | ||
| events.onInitialized(width, height, exoPlayer.getDuration(), rotationCorrection); | ||
| } | ||
|
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| @Override | ||
| public void onPlaybackStateChanged(final int playbackState) { | ||
| switch (playbackState) { | ||
| case Player.STATE_BUFFERING: | ||
| setBuffering(true); | ||
| events.onBufferingUpdate(exoPlayer.getBufferedPosition()); | ||
| break; | ||
| case Player.STATE_READY: | ||
| sendInitialized(); | ||
| break; | ||
| case Player.STATE_ENDED: | ||
| events.onCompleted(); | ||
| break; | ||
| case Player.STATE_IDLE: | ||
| break; | ||
| } | ||
| if (playbackState != Player.STATE_BUFFERING) { | ||
| setBuffering(false); | ||
| } | ||
| } | ||
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| @Override | ||
| public void onPlayerError(@NonNull final PlaybackException error) { | ||
| setBuffering(false); | ||
| if (error.errorCode == PlaybackException.ERROR_CODE_BEHIND_LIVE_WINDOW) { | ||
| // See https://exoplayer.dev/live-streaming.html#behindlivewindowexception-and-error_code_behind_live_window | ||
| exoPlayer.seekToDefaultPosition(); | ||
| exoPlayer.prepare(); | ||
| } else { | ||
| events.onError("VideoError", "Video player had error " + error, null); | ||
| } | ||
| } | ||
|
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| @Override | ||
| public void onIsPlayingChanged(boolean isPlaying) { | ||
| events.onIsPlayingStateUpdate(isPlaying); | ||
| } | ||
| } |
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