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/*
* Copyright (C) 2014 Yuya Tanaka
*
* 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 net.ypresto.androidtranscoder.engine;
import android.annotation.SuppressLint;
import android.media.MediaCodec;
import android.media.MediaExtractor;
import android.media.MediaFormat;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
public class PassThroughTrackTranscoder implements TrackTranscoder {
private final MediaExtractor mExtractor;
private final int mTrackIndex;
private final QueuedMuxer mMuxer;
private final QueuedMuxer.SampleType mSampleType;
private final MediaCodec.BufferInfo mBufferInfo = new MediaCodec.BufferInfo();
private int mBufferSize;
private ByteBuffer mBuffer;
private boolean mIsEOS;
private MediaFormat mActualOutputFormat;
private long mWrittenPresentationTimeUs;
public PassThroughTrackTranscoder(MediaExtractor extractor, int trackIndex,
QueuedMuxer muxer, QueuedMuxer.SampleType sampleType) {
mExtractor = extractor;
mTrackIndex = trackIndex;
mMuxer = muxer;
mSampleType = sampleType;
mActualOutputFormat = mExtractor.getTrackFormat(mTrackIndex);
mMuxer.setOutputFormat(mSampleType, mActualOutputFormat);
mBufferSize = mActualOutputFormat.getInteger(MediaFormat.KEY_MAX_INPUT_SIZE);
mBuffer = ByteBuffer.allocateDirect(mBufferSize).order(ByteOrder.nativeOrder());
}
@Override
public void setup() {
}
@Override
public MediaFormat getDeterminedFormat() {
return mActualOutputFormat;
}
@SuppressLint("Assert")
@Override
public boolean stepPipeline() {
if (mIsEOS) return false;
int trackIndex = mExtractor.getSampleTrackIndex();
if (trackIndex < 0) {
mBuffer.clear();
mBufferInfo.set(0, 0, 0, MediaCodec.BUFFER_FLAG_END_OF_STREAM);
mMuxer.writeSampleData(mSampleType, mBuffer, mBufferInfo);
mIsEOS = true;
return true;
}
if (trackIndex != mTrackIndex) return false;
mBuffer.clear();
int sampleSize = mExtractor.readSampleData(mBuffer, 0);
assert sampleSize <= mBufferSize;
boolean isKeyFrame = (mExtractor.getSampleFlags() & MediaExtractor.SAMPLE_FLAG_SYNC) != 0;
int flags = isKeyFrame ? MediaCodec.BUFFER_FLAG_SYNC_FRAME : 0;
mBufferInfo.set(0, sampleSize, mExtractor.getSampleTime(), flags);
mMuxer.writeSampleData(mSampleType, mBuffer, mBufferInfo);
mWrittenPresentationTimeUs = mBufferInfo.presentationTimeUs;
mExtractor.advance();
return true;
}
@Override
public long getWrittenPresentationTimeUs() {
return mWrittenPresentationTimeUs;
}
@Override
public boolean isFinished() {
return mIsEOS;
}
@Override
public void release() {
}
}
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