diff options
Diffstat (limited to 'src/com/android/tv/tuner/exoplayer/ac3/AudioClock.java')
-rw-r--r-- | src/com/android/tv/tuner/exoplayer/ac3/AudioClock.java | 107 |
1 files changed, 0 insertions, 107 deletions
diff --git a/src/com/android/tv/tuner/exoplayer/ac3/AudioClock.java b/src/com/android/tv/tuner/exoplayer/ac3/AudioClock.java deleted file mode 100644 index 600c2c88..00000000 --- a/src/com/android/tv/tuner/exoplayer/ac3/AudioClock.java +++ /dev/null @@ -1,107 +0,0 @@ -/* - * Copyright (C) 2015 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 com.android.tv.tuner.exoplayer.ac3; - -import com.android.tv.common.SoftPreconditions; - -import android.os.SystemClock; - -/** - * Copy of {@link com.google.android.exoplayer.MediaClock}. - * <p> - * A simple clock for tracking the progression of media time. The clock can be started, stopped and - * its time can be set and retrieved. When started, this clock is based on - * {@link SystemClock#elapsedRealtime()}. - */ -/* package */ class AudioClock { - private boolean mStarted; - - /** - * The media time when the clock was last set or stopped. - */ - private long mPositionUs; - - /** - * The difference between {@link SystemClock#elapsedRealtime()} and {@link #mPositionUs} - * when the clock was last set or mStarted. - */ - private long mDeltaUs; - - private float mPlaybackSpeed = 1.0f; - private long mDeltaUpdatedTimeUs; - - /** - * Starts the clock. Does nothing if the clock is already started. - */ - public void start() { - if (!mStarted) { - mStarted = true; - mDeltaUs = elapsedRealtimeMinus(mPositionUs); - mDeltaUpdatedTimeUs = SystemClock.elapsedRealtime() * 1000; - } - } - - /** - * Stops the clock. Does nothing if the clock is already stopped. - */ - public void stop() { - if (mStarted) { - mPositionUs = elapsedRealtimeMinus(mDeltaUs); - mStarted = false; - } - } - - /** - * @param timeUs The position to set in microseconds. - */ - public void setPositionUs(long timeUs) { - this.mPositionUs = timeUs; - mDeltaUs = elapsedRealtimeMinus(timeUs); - mDeltaUpdatedTimeUs = SystemClock.elapsedRealtime() * 1000; - } - - /** - * @return The current position in microseconds. - */ - public long getPositionUs() { - if (!mStarted) { - return mPositionUs; - } - if (mPlaybackSpeed != 1.0f) { - long elapsedTimeFromPlaybackSpeedChanged = SystemClock.elapsedRealtime() * 1000 - - mDeltaUpdatedTimeUs; - return elapsedRealtimeMinus(mDeltaUs) - + (long) ((mPlaybackSpeed - 1.0f) * elapsedTimeFromPlaybackSpeedChanged); - } else { - return elapsedRealtimeMinus(mDeltaUs); - } - } - - /** - * Sets playback speed. {@code speed} should be positive. - */ - public void setPlaybackSpeed(float speed) { - SoftPreconditions.checkState(speed > 0); - mDeltaUs = elapsedRealtimeMinus(getPositionUs()); - mDeltaUpdatedTimeUs = SystemClock.elapsedRealtime() * 1000; - mPlaybackSpeed = speed; - } - - private long elapsedRealtimeMinus(long toSubtractUs) { - return SystemClock.elapsedRealtime() * 1000 - toSubtractUs; - } -} |