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/*
* 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;
import android.os.Handler;
import com.android.tv.tuner.exoplayer.buffer.BufferManager;
import com.android.tv.tuner.exoplayer.buffer.RecordingSampleBuffer;
import com.android.tv.tuner.tvinput.PlaybackBufferListener;
import com.google.android.exoplayer.MediaFormat;
import com.google.android.exoplayer.MediaFormatHolder;
import com.google.android.exoplayer.MediaFormatUtil;
import com.google.android.exoplayer.SampleHolder;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
/**
* A class that plays a recorded stream without using {@link android.media.MediaExtractor}, since
* all samples are extracted and stored to the permanent storage already.
*/
public class FileSampleExtractor implements SampleExtractor {
private static final String TAG = "FileSampleExtractor";
private static final boolean DEBUG = false;
private int mTrackCount;
private boolean mReleased;
private final List<MediaFormat> mTrackFormats = new ArrayList<>();
private final BufferManager mBufferManager;
private final PlaybackBufferListener mBufferListener;
private BufferManager.SampleBuffer mSampleBuffer;
public FileSampleExtractor(BufferManager bufferManager, PlaybackBufferListener bufferListener) {
mBufferManager = bufferManager;
mBufferListener = bufferListener;
mTrackCount = -1;
}
@Override
public void maybeThrowError() throws IOException {
// Do nothing.
}
@Override
public boolean prepare() throws IOException {
List<BufferManager.TrackFormat> trackFormatList = mBufferManager.readTrackInfoFiles();
if (trackFormatList == null || trackFormatList.isEmpty()) {
throw new IOException("Cannot find meta files for the recording.");
}
mTrackCount = trackFormatList.size();
List<String> ids = new ArrayList<>();
mTrackFormats.clear();
for (int i = 0; i < mTrackCount; ++i) {
BufferManager.TrackFormat trackFormat = trackFormatList.get(i);
ids.add(trackFormat.trackId);
mTrackFormats.add(MediaFormatUtil.createMediaFormat(trackFormat.format));
}
mSampleBuffer =
new RecordingSampleBuffer(
mBufferManager,
mBufferListener,
true,
RecordingSampleBuffer.BUFFER_REASON_RECORDED_PLAYBACK);
mSampleBuffer.init(ids, mTrackFormats);
return true;
}
@Override
public List<MediaFormat> getTrackFormats() {
return mTrackFormats;
}
@Override
public void getTrackMediaFormat(int track, MediaFormatHolder outMediaFormatHolder) {
outMediaFormatHolder.format = mTrackFormats.get(track);
outMediaFormatHolder.drmInitData = null;
}
@Override
public void release() {
if (!mReleased) {
if (mSampleBuffer != null) {
try {
mSampleBuffer.release();
} catch (IOException e) {
// Do nothing. Playback ends now.
}
}
}
mReleased = true;
}
@Override
public void selectTrack(int index) {
mSampleBuffer.selectTrack(index);
}
@Override
public void deselectTrack(int index) {
mSampleBuffer.deselectTrack(index);
}
@Override
public long getBufferedPositionUs() {
return mSampleBuffer.getBufferedPositionUs();
}
@Override
public void seekTo(long positionUs) {
mSampleBuffer.seekTo(positionUs);
}
@Override
public int readSample(int track, SampleHolder sampleHolder) {
return mSampleBuffer.readSample(track, sampleHolder);
}
@Override
public boolean continueBuffering(long positionUs) {
return mSampleBuffer.continueBuffering(positionUs);
}
@Override
public void setOnCompletionListener(OnCompletionListener listener, Handler handler) {}
}
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