package com.googlecode.mp4parser.android;
import android.app.Activity;
import android.os.Bundle;
import android.os.Debug;
import android.os.Environment;
import android.util.Log;
import android.widget.TextView;
import com.coremedia.iso.IsoFile;
import com.coremedia.iso.boxes.TimeToSampleBox;
import com.googlecode.mp4parser.authoring.Movie;
import com.googlecode.mp4parser.authoring.Track;
import com.googlecode.mp4parser.authoring.builder.DefaultMp4Builder;
import com.googlecode.mp4parser.authoring.container.mp4.MovieCreator;
import com.googlecode.mp4parser.authoring.tracks.CroppedTrack;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.RandomAccessFile;
import java.nio.channels.FileChannel;
import java.util.Arrays;
import java.util.LinkedList;
import java.util.List;
public class Mp4ParserPerformance extends Activity {
@Override
public void onCreate(Bundle savedInstanceState) {
Debug.startMethodTracing();
Debug.startAllocCounting();
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
TextView tv = (TextView) findViewById(R.id.text);
String text = "";
File sdCard = Environment.getExternalStorageDirectory();
/* try {
FileChannel fc = new RandomAccessFile(new File(sdCard, "suckerpunch-distantplanet_h1080p.mov").getAbsolutePath(), "r").getChannel();
ByteBuffer content = fc.map(FileChannel.MapMode.READ_ONLY, 0, 20000000) ;
ArrayList<ByteBuffer> bb = new ArrayList<ByteBuffer>(1200);
for (int i = 0; i < 1200; i++) {
content.position(i*1000);
ByteBuffer part = content.slice();
part.limit(1000);
bb.add(part );
}
FileOutputStream fos = new FileOutputStream(new File(sdCard, String.format("output.mp4")));
FileChannel outFC = fos.getChannel();
outFC.write(bb.toArray(new ByteBuffer[800]));
fos.close();
outFC.close();
tv.append("5");
} catch (FileNotFoundException e) {
throw new RuntimeException(e);
} catch (IOException e) {
throw new RuntimeException(e);
} */
try {
//Debug.startMethodTracing("mp4");
long a = System.currentTimeMillis();
tv.append("1");
// Movie movie = new MovieCreator().build(new RandomAccessFileIsoBufferWrapperImpl(new File(sdCard, "suckerpunch-distantplanet_h1080p.mov")));
Movie movie = MovieCreator.build(new RandomAccessFile(new File(sdCard, "Movies/a.mp4").getAbsolutePath(), "r").getChannel());
tv.append("2");
Log.v("PERF", "Parsing took " + (System.currentTimeMillis() - a));
text += "Parsing took " + Long.toString(System.currentTimeMillis() - a) + "\n";
List<Track> tracks = movie.getTracks();
movie.setTracks(new LinkedList<Track>());
// remove all tracks we will create new tracks from the old
double startTime = 35.000;
double endTime = 60 * 20;
boolean timeCorrected = false;
// Here we try to find a track that has sync samples. Since we can only start decoding
// at such a sample we SHOULD make sure that the start of the new fragment is exactly
// such a frame
for (Track track : tracks) {
if (track.getSyncSamples() != null && track.getSyncSamples().length > 0) {
if (timeCorrected) {
// This exception here could be a false positive in case we have multiple tracks
// with sync samples at exactly the same positions. E.g. a single movie containing
// multiple qualities of the same video (Microsoft Smooth Streaming file)
throw new RuntimeException("The startTime has already been corrected by another track with SyncSample. Not Supported.");
}
startTime = correctTimeToNextSyncSample(track, startTime);
endTime = correctTimeToNextSyncSample(track, endTime);
timeCorrected = true;
}
}
for (Track track : tracks) {
long currentSample = 0;
double currentTime = 0;
long startSample = -1;
long endSample = -1;
for (int i = 0; i < track.getDecodingTimeEntries().size(); i++) {
TimeToSampleBox.Entry entry = track.getDecodingTimeEntries().get(i);
for (int j = 0; j < entry.getCount(); j++) {
// entry.getDelta() is the amount of time the current sample covers.
if (currentTime <= startTime) {
// current sample is still before the new starttime
startSample = currentSample;
}
if (currentTime <= endTime) {
// current sample is after the new start time and still before the new endtime
endSample = currentSample;
} else {
// current sample is after the end of the cropped video
break;
}
currentTime += (double) entry.getDelta() / (double) track.getTrackMetaData().getTimescale();
currentSample++;
}
}
movie.addTrack(new CroppedTrack(track, startSample, endSample));
}
a = System.currentTimeMillis();
tv.append("3");
IsoFile mp4 = new DefaultMp4Builder().build(movie);
Log.v("PERF", "Building took " + (System.currentTimeMillis() - a));
text += "Building took " + (System.currentTimeMillis() - a) + "\n";
tv.append("4");
FileOutputStream fos = new FileOutputStream(new File(sdCard, String.format("output-%f-%f.mp4", startTime, endTime)));
FileChannel outFC = fos.getChannel();
a = System.currentTimeMillis();
mp4.getBox(outFC);
long fileSize = outFC.size();
fos.close();
outFC.close();
tv.append("5");
long systemEndTime = System.currentTimeMillis();
Log.v("PERF", "Writing took " + (systemEndTime - a));
text += "Writing took " + (systemEndTime - a) + "\n";
text += "Writing speed " + (fileSize / (systemEndTime - a) / 1000) + " MB/s\n";
tv.setText(text);
Debug.stopMethodTracing();
} catch (IOException e) {
throw new RuntimeException(e);
}
}
private static double correctTimeToNextSyncSample(Track track, double cutHere) {
double[] timeOfSyncSamples = new double[track.getSyncSamples().length];
long currentSample = 0;
double currentTime = 0;
for (TimeToSampleBox.Entry entry : track.getDecodingTimeEntries()) {
for (int j = 0; j < entry.getCount(); j++) {
if (Arrays.binarySearch(track.getSyncSamples(), currentSample + 1) >= 0) {
// samples always start with 1 but we start with zero therefore +1
timeOfSyncSamples[Arrays.binarySearch(track.getSyncSamples(), currentSample + 1)] = currentTime;
}
currentTime += (double) entry.getDelta() / (double) track.getTrackMetaData().getTimescale();
currentSample++;
}
}
for (double timeOfSyncSample : timeOfSyncSamples) {
if (timeOfSyncSample > cutHere) {
return timeOfSyncSample;
}
}
return timeOfSyncSamples[timeOfSyncSamples.length - 1];
}
}
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