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FakeTrickplayRunnable.java
/* * 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 com.example.android.sampletvinput.player; import android.media.PlaybackParams; import android.os.Build; import android.os.Handler; import android.os.Looper; import android.support.annotation.RequiresApi; import android.util.Log; import com.google.android.media.tv.companionlibrary.TvPlayer; @RequiresApi(api = Build.VERSION_CODES.M) public class FakeTrickplayRunnable implements Runnable { private final static String TAG = FakeTrickplayRunnable.class.getSimpleName(); private final static boolean DEBUG = false; private final static int DELAY_MILLIS = 1000; // 1 FPS private float mSpeed; private boolean mActive; private TvPlayer mTvPlayer; private Handler mFakeTrickplayHandler; public FakeTrickplayRunnable(TvPlayer tvPlayer) { mTvPlayer = tvPlayer; } @Override public void run() { if (DEBUG) { Log.d(TAG, "Seek from " + mTvPlayer.getCurrentPosition()); Log.d(TAG, "by " + mSpeed * DELAY_MILLIS); } mTvPlayer.seekTo((long) (mTvPlayer.getCurrentPosition() + mSpeed * DELAY_MILLIS)); if (mActive) { mFakeTrickplayHandler.postDelayed(this, DELAY_MILLIS); } } public void setPlaybackParams(PlaybackParams playbackParams) { if (Math.abs(playbackParams.getSpeed() - 1f) < 0.1) { // Handle normal playback, stopping the background thread if (DEBUG) { Log.d(TAG, "Returning to normal speed, so we will stop running thread"); } stop(); return; } if (DEBUG) { Log.d(TAG, "Start trickplay thread with a speed of " + playbackParams.getSpeed()); } mSpeed = playbackParams.getSpeed(); if (mFakeTrickplayHandler == null) { mFakeTrickplayHandler = new Handler(Looper.getMainLooper()); } if (!mActive) { mFakeTrickplayHandler.post(this); mActive = true; } } public void stop() { if (DEBUG) { Log.d(TAG, "Stop trickplay handler thread"); } mActive = false; if (mFakeTrickplayHandler != null) { mFakeTrickplayHandler.removeCallbacksAndMessages(null); } } }