CrackMe.apk
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package com.google.android.exoplayer2.source.rtsp.reader;
import com.google.android.exoplayer2.C;
import com.google.android.exoplayer2.ParserException;
import com.google.android.exoplayer2.extractor.ExtractorOutput;
import com.google.android.exoplayer2.extractor.TrackOutput;
import com.google.android.exoplayer2.source.rtsp.RtpPayloadFormat;
import com.google.android.exoplayer2.util.Assertions;
import com.google.android.exoplayer2.util.Log;
import com.google.android.exoplayer2.util.NalUnitUtil;
import com.google.android.exoplayer2.util.ParsableByteArray;
import com.google.android.exoplayer2.util.Util;
import com.google.common.primitives.SignedBytes;
import okio.Utf8;
import org.checkerframework.checker.nullness.qual.RequiresNonNull;
final class RtpH265Reader implements RtpPayloadReader {
private static final int FU_PAYLOAD_OFFSET = 3;
private static final long MEDIA_CLOCK_FREQUENCY = 90000;
private static final int NAL_IDR_N_LP = 20;
private static final int NAL_IDR_W_RADL = 19;
private static final int RTP_PACKET_TYPE_AP = 48;
private static final int RTP_PACKET_TYPE_FU = 49;
private static final String TAG = "RtpH265Reader";
private int bufferFlags;
private long firstReceivedTimestamp;
private int fragmentedSampleSizeBytes;
private final ParsableByteArray fuScratchBuffer = new ParsableByteArray();
private final ParsableByteArray nalStartCodeArray = new ParsableByteArray(NalUnitUtil.NAL_START_CODE);
private final RtpPayloadFormat payloadFormat;
private int previousSequenceNumber;
private long startTimeOffsetUs;
private TrackOutput trackOutput;
private static int getBufferFlagsFromNalType(int i) {
return (i == 19 || i == 20) ? 1 : 0;
}
public void onReceivingFirstPacket(long j, int i) {
}
public RtpH265Reader(RtpPayloadFormat rtpPayloadFormat) {
this.payloadFormat = rtpPayloadFormat;
this.firstReceivedTimestamp = C.TIME_UNSET;
this.previousSequenceNumber = -1;
}
public void createTracks(ExtractorOutput extractorOutput, int i) {
TrackOutput track = extractorOutput.track(i, 2);
this.trackOutput = track;
track.format(this.payloadFormat.format);
}
public void consume(ParsableByteArray parsableByteArray, long j, int i, boolean z) throws ParserException {
int i2 = i;
if (parsableByteArray.getData().length != 0) {
int i3 = (parsableByteArray.getData()[0] >> 1) & 63;
Assertions.checkStateNotNull(this.trackOutput);
if (i3 >= 0 && i3 < 48) {
processSingleNalUnitPacket(parsableByteArray);
} else if (i3 == 48) {
throw new UnsupportedOperationException("need to implement processAggregationPacket");
} else if (i3 == 49) {
processFragmentationUnitPacket(parsableByteArray, i2);
} else {
throw ParserException.createForMalformedManifest(String.format("RTP H265 payload type [%d] not supported.", new Object[]{Integer.valueOf(i3)}), (Throwable) null);
}
if (z) {
long j2 = j;
if (this.firstReceivedTimestamp == C.TIME_UNSET) {
this.firstReceivedTimestamp = j2;
}
long sampleUs = toSampleUs(this.startTimeOffsetUs, j, this.firstReceivedTimestamp);
this.trackOutput.sampleMetadata(sampleUs, this.bufferFlags, this.fragmentedSampleSizeBytes, 0, (TrackOutput.CryptoData) null);
this.fragmentedSampleSizeBytes = 0;
}
this.previousSequenceNumber = i2;
return;
}
throw ParserException.createForMalformedManifest("Empty RTP data packet.", (Throwable) null);
}
public void seek(long j, long j2) {
this.firstReceivedTimestamp = j;
this.fragmentedSampleSizeBytes = 0;
this.startTimeOffsetUs = j2;
}
@RequiresNonNull({"trackOutput"})
private void processSingleNalUnitPacket(ParsableByteArray parsableByteArray) {
int bytesLeft = parsableByteArray.bytesLeft();
this.fragmentedSampleSizeBytes += writeStartCode();
this.trackOutput.sampleData(parsableByteArray, bytesLeft);
this.fragmentedSampleSizeBytes += bytesLeft;
this.bufferFlags = getBufferFlagsFromNalType((parsableByteArray.getData()[0] >> 1) & 63);
}
@RequiresNonNull({"trackOutput"})
private void processFragmentationUnitPacket(ParsableByteArray parsableByteArray, int i) throws ParserException {
if (parsableByteArray.getData().length >= 3) {
byte b = parsableByteArray.getData()[1] & 7;
byte b2 = parsableByteArray.getData()[2];
byte b3 = b2 & Utf8.REPLACEMENT_BYTE;
boolean z = (b2 & 128) > 0;
boolean z2 = (b2 & SignedBytes.MAX_POWER_OF_TWO) > 0;
if (z) {
this.fragmentedSampleSizeBytes += writeStartCode();
parsableByteArray.getData()[1] = (byte) ((b3 << 1) & 127);
parsableByteArray.getData()[2] = (byte) b;
this.fuScratchBuffer.reset(parsableByteArray.getData());
this.fuScratchBuffer.setPosition(1);
} else {
int i2 = (this.previousSequenceNumber + 1) % 65535;
if (i != i2) {
Log.w(TAG, Util.formatInvariant("Received RTP packet with unexpected sequence number. Expected: %d; received: %d. Dropping packet.", Integer.valueOf(i2), Integer.valueOf(i)));
return;
} else {
this.fuScratchBuffer.reset(parsableByteArray.getData());
this.fuScratchBuffer.setPosition(3);
}
}
int bytesLeft = this.fuScratchBuffer.bytesLeft();
this.trackOutput.sampleData(this.fuScratchBuffer, bytesLeft);
this.fragmentedSampleSizeBytes += bytesLeft;
if (z2) {
this.bufferFlags = getBufferFlagsFromNalType(b3);
return;
}
return;
}
throw ParserException.createForMalformedManifest("Malformed FU header.", (Throwable) null);
}
private int writeStartCode() {
this.nalStartCodeArray.setPosition(0);
int bytesLeft = this.nalStartCodeArray.bytesLeft();
((TrackOutput) Assertions.checkNotNull(this.trackOutput)).sampleData(this.nalStartCodeArray, bytesLeft);
return bytesLeft;
}
private static long toSampleUs(long j, long j2, long j3) {
return j + Util.scaleLargeTimestamp(j2 - j3, 1000000, MEDIA_CLOCK_FREQUENCY);
}
}
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