| /* |
| * 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.android.tv.input; |
| |
| import android.net.Uri; |
| import android.support.annotation.Nullable; |
| import android.util.Log; |
| |
| import java.util.ArrayList; |
| import java.util.Iterator; |
| import java.util.List; |
| |
| /** |
| * A class to manage fake tuners for the tune and the recording. |
| */ |
| public class TunerHelper { |
| private static final String TAG = "TunerHelper"; |
| private static final boolean DEBUG = false; |
| |
| private final List<Tuner> mTuners = new ArrayList<>(); |
| private final int mTunerCount; |
| |
| public TunerHelper(int tunerCount) { |
| mTunerCount = tunerCount; |
| } |
| |
| /** |
| * Checks whether there are available tuners for the recording. |
| */ |
| public boolean tunerAvailableForRecording() { |
| if (mTuners.size() < mTunerCount) { |
| return true; |
| } |
| for (Tuner tuner : mTuners) { |
| if (!tuner.recording) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| /** |
| * Checks whether there is available tuner. |
| * If there's available tuner, it is assigned to the channel. |
| */ |
| public boolean tune(@Nullable Uri channelUri, boolean forRecording) { |
| if (channelUri == null) { |
| return false; |
| } |
| for (Tuner tuner : mTuners) { |
| // Find available tuner which is used only for the recording. |
| if (tuner.channelUri.equals(channelUri)) { |
| if (!forRecording && !tuner.tuning) { |
| tuner.tuning = true; |
| return true; |
| } else if (forRecording && !tuner.recording) { |
| tuner.recording = true; |
| return true; |
| } |
| } |
| } |
| if (mTuners.size() < mTunerCount) { |
| // Assign new tuner. |
| mTuners.add(new Tuner(channelUri, forRecording)); |
| return true; |
| } |
| Log.i(TAG, "No available tuners. tuner count: " + mTunerCount); |
| return false; |
| } |
| |
| /** |
| * Releases the tuner which was being used for the tune. |
| */ |
| public void stopTune(@Nullable Uri channelUri) { |
| if (channelUri == null) { |
| return; |
| } |
| Tuner candidate = null; |
| Iterator<Tuner> iterator = mTuners.iterator(); |
| while (iterator.hasNext()) { |
| Tuner tuner = iterator.next(); |
| if (tuner.channelUri.equals(channelUri) && tuner.tuning) { |
| if (tuner.recording) { |
| // A tuner which is used both for the tune and recording is the candidate. |
| candidate = tuner; |
| } else { |
| // Remove the tuner which is used only for the tune. |
| if (DEBUG) Log.d(TAG, "Removed tuner for tune"); |
| iterator.remove(); |
| return; |
| } |
| } |
| } |
| if (candidate != null) { |
| candidate.tuning = false; |
| } |
| } |
| |
| /** |
| * Releases the tuner which was being used for the recording. |
| */ |
| public void stopRecording(@Nullable Uri channelUri) { |
| if (channelUri == null) { |
| return; |
| } |
| Tuner candidate = null; |
| Iterator<Tuner> iterator = mTuners.iterator(); |
| while (iterator.hasNext()) { |
| Tuner tuner = iterator.next(); |
| if (tuner.channelUri.equals(channelUri)) { |
| if (tuner.recording) { |
| if (tuner.tuning) { |
| // A tuner which is used both for the tune and recording is the candidate. |
| candidate = tuner; |
| } else { |
| // Remove the tuner which is used only for the recording. |
| iterator.remove(); |
| return; |
| } |
| } else { |
| Log.w(TAG, "Tuner found for " + channelUri + ", but not used for recording"); |
| } |
| } |
| } |
| if (candidate != null) { |
| candidate.recording = false; |
| } |
| } |
| |
| private static class Tuner { |
| public final Uri channelUri; |
| public boolean tuning; |
| public boolean recording; |
| |
| public Tuner (Uri channelUri, boolean forRecording) { |
| this.channelUri = channelUri; |
| this.tuning = !forRecording; |
| this.recording = forRecording; |
| } |
| } |
| } |