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/*
* Copyright (C) 2016 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.audio;
import static org.mozilla.thirdparty.com.google.android.exoplayer2.util.Util.castNonNull;
import android.os.Handler;
import android.os.SystemClock;
import androidx.annotation.Nullable;
import org.mozilla.thirdparty.com.google.android.exoplayer2.C;
import org.mozilla.thirdparty.com.google.android.exoplayer2.Format;
import org.mozilla.thirdparty.com.google.android.exoplayer2.Renderer;
import org.mozilla.thirdparty.com.google.android.exoplayer2.decoder.DecoderCounters;
import org.mozilla.thirdparty.com.google.android.exoplayer2.util.Assertions;
/**
* Listener of audio {@link Renderer} events. All methods have no-op default implementations to
* allow selective overrides.
*/
public interface AudioRendererEventListener {
/**
* Called when the renderer is enabled.
*
* @param counters {@link DecoderCounters} that will be updated by the renderer for as long as it
* remains enabled.
*/
default void onAudioEnabled(DecoderCounters counters) {}
/**
* Called when the audio session is set.
*
* @param audioSessionId The audio session id.
*/
default void onAudioSessionId(int audioSessionId) {}
/**
* Called when a decoder is created.
*
* @param decoderName The decoder that was created.
* @param initializedTimestampMs {@link SystemClock#elapsedRealtime()} when initialization
* finished.
* @param initializationDurationMs The time taken to initialize the decoder in milliseconds.
*/
default void onAudioDecoderInitialized(
String decoderName, long initializedTimestampMs, long initializationDurationMs) {}
/**
* Called when the format of the media being consumed by the renderer changes.
*
* @param format The new format.
*/
default void onAudioInputFormatChanged(Format format) {}
/**
* Called when an {@link AudioSink} underrun occurs.
*
* @param bufferSize The size of the {@link AudioSink}'s buffer, in bytes.
* @param bufferSizeMs The size of the {@link AudioSink}'s buffer, in milliseconds, if it is
* configured for PCM output. {@link C#TIME_UNSET} if it is configured for passthrough output,
* as the buffered media can have a variable bitrate so the duration may be unknown.
* @param elapsedSinceLastFeedMs The time since the {@link AudioSink} was last fed data.
*/
default void onAudioSinkUnderrun(
int bufferSize, long bufferSizeMs, long elapsedSinceLastFeedMs) {}
/**
* Called when the renderer is disabled.
*
* @param counters {@link DecoderCounters} that were updated by the renderer.
*/
default void onAudioDisabled(DecoderCounters counters) {}
/**
* Dispatches events to a {@link AudioRendererEventListener}.
*/
final class EventDispatcher {
@Nullable private final Handler handler;
@Nullable private final AudioRendererEventListener listener;
/**
* @param handler A handler for dispatching events, or null if creating a dummy instance.
* @param listener The listener to which events should be dispatched, or null if creating a
* dummy instance.
*/
public EventDispatcher(@Nullable Handler handler,
@Nullable AudioRendererEventListener listener) {
this.handler = listener != null ? Assertions.checkNotNull(handler) : null;
this.listener = listener;
}
/**
* Invokes {@link AudioRendererEventListener#onAudioEnabled(DecoderCounters)}.
*/
public void enabled(final DecoderCounters decoderCounters) {
if (handler != null) {
handler.post(() -> castNonNull(listener).onAudioEnabled(decoderCounters));
}
}
/**
* Invokes {@link AudioRendererEventListener#onAudioDecoderInitialized(String, long, long)}.
*/
public void decoderInitialized(final String decoderName,
final long initializedTimestampMs, final long initializationDurationMs) {
if (handler != null) {
handler.post(
() ->
castNonNull(listener)
.onAudioDecoderInitialized(
decoderName, initializedTimestampMs, initializationDurationMs));
}
}
/**
* Invokes {@link AudioRendererEventListener#onAudioInputFormatChanged(Format)}.
*/
public void inputFormatChanged(final Format format) {
if (handler != null) {
handler.post(() -> castNonNull(listener).onAudioInputFormatChanged(format));
}
}
/**
* Invokes {@link AudioRendererEventListener#onAudioSinkUnderrun(int, long, long)}.
*/
public void audioTrackUnderrun(final int bufferSize, final long bufferSizeMs,
final long elapsedSinceLastFeedMs) {
if (handler != null) {
handler.post(
() ->
castNonNull(listener)
.onAudioSinkUnderrun(bufferSize, bufferSizeMs, elapsedSinceLastFeedMs));
}
}
/**
* Invokes {@link AudioRendererEventListener#onAudioDisabled(DecoderCounters)}.
*/
public void disabled(final DecoderCounters counters) {
counters.ensureUpdated();
if (handler != null) {
handler.post(
() -> {
counters.ensureUpdated();
castNonNull(listener).onAudioDisabled(counters);
});
}
}
/**
* Invokes {@link AudioRendererEventListener#onAudioSessionId(int)}.
*/
public void audioSessionId(final int audioSessionId) {
if (handler != null) {
handler.post(() -> castNonNull(listener).onAudioSessionId(audioSessionId));
}
}
}
}
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