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/*
* Copyright (C) 2017 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;
import androidx.annotation.Nullable;
import org.mozilla.thirdparty.com.google.android.exoplayer2.util.Assertions;
/**
* The parameters that apply to playback.
*/
public final class PlaybackParameters {
/**
* The default playback parameters: real-time playback with no pitch modification or silence
* skipping.
*/
public static final PlaybackParameters DEFAULT = new PlaybackParameters(/* speed= */ 1f);
/** The factor by which playback will be sped up. */
public final float speed;
/** The factor by which the audio pitch will be scaled. */
public final float pitch;
/** Whether to skip silence in the input. */
public final boolean skipSilence;
private final int scaledUsPerMs;
/**
* Creates new playback parameters that set the playback speed.
*
* @param speed The factor by which playback will be sped up. Must be greater than zero.
*/
public PlaybackParameters(float speed) {
this(speed, /* pitch= */ 1f, /* skipSilence= */ false);
}
/**
* Creates new playback parameters that set the playback speed and audio pitch scaling factor.
*
* @param speed The factor by which playback will be sped up. Must be greater than zero.
* @param pitch The factor by which the audio pitch will be scaled. Must be greater than zero.
*/
public PlaybackParameters(float speed, float pitch) {
this(speed, pitch, /* skipSilence= */ false);
}
/**
* Creates new playback parameters that set the playback speed, audio pitch scaling factor and
* whether to skip silence in the audio stream.
*
* @param speed The factor by which playback will be sped up. Must be greater than zero.
* @param pitch The factor by which the audio pitch will be scaled. Must be greater than zero.
* @param skipSilence Whether to skip silences in the audio stream.
*/
public PlaybackParameters(float speed, float pitch, boolean skipSilence) {
Assertions.checkArgument(speed > 0);
Assertions.checkArgument(pitch > 0);
this.speed = speed;
this.pitch = pitch;
this.skipSilence = skipSilence;
scaledUsPerMs = Math.round(speed * 1000f);
}
/**
* Returns the media time in microseconds that will elapse in {@code timeMs} milliseconds of
* wallclock time.
*
* @param timeMs The time to scale, in milliseconds.
* @return The scaled time, in microseconds.
*/
public long getMediaTimeUsForPlayoutTimeMs(long timeMs) {
return timeMs * scaledUsPerMs;
}
@Override
public boolean equals(@Nullable Object obj) {
if (this == obj) {
return true;
}
if (obj == null || getClass() != obj.getClass()) {
return false;
}
PlaybackParameters other = (PlaybackParameters) obj;
return this.speed == other.speed
&& this.pitch == other.pitch
&& this.skipSilence == other.skipSilence;
}
@Override
public int hashCode() {
int result = 17;
result = 31 * result + Float.floatToRawIntBits(speed);
result = 31 * result + Float.floatToRawIntBits(pitch);
result = 31 * result + (skipSilence ? 1 : 0);
return result;
}
}
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