Merge "Align CryptoInfo value and identity equality" into rvc-dev am: 9a2fdad064 (a11531e4) · Commits · e / os / android_frameworks_base

apex/media/framework/java/android/media/MediaParser.java

+90 −34

Original line number	Original line	Diff line number	Diff line
	@@ -402,9 +402,9 @@ public final class MediaParser {
	* onSampleDataFound(int, MediaParser.InputReader)} for the specified track, since the		* onSampleDataFound(int, MediaParser.InputReader)} for the specified track, since the
	* last byte belonging to the sample whose metadata is being passed.		* last byte belonging to the sample whose metadata is being passed.
	* @param cryptoInfo Encryption data required to decrypt the sample. May be null for		* @param cryptoInfo Encryption data required to decrypt the sample. May be null for
	* unencrypted samples. MediaParser may reuse {@link CryptoInfo} instances to avoid		* unencrypted samples. Implementors should treat any output {@link CryptoInfo}
	* allocations, so implementations of this method must not write to or keep reference to		* instances as immutable. MediaParser will not modify any output {@code cryptoInfos}
	* the fields of this parameter.		* and implementors should not modify them either.
	*/		*/
	void onSampleCompleted(		void onSampleCompleted(
	int trackIndex,		int trackIndex,
	@@ -1409,23 +1409,28 @@ public final class MediaParser {
	private class TrackOutputAdapter implements TrackOutput {		private class TrackOutputAdapter implements TrackOutput {

	private final int mTrackIndex;		private final int mTrackIndex;
	private final CryptoInfo mCryptoInfo;
			private CryptoInfo mLastOutputCryptoInfo;
			private CryptoInfo.Pattern mLastOutputEncryptionPattern;
			private CryptoData mLastReceivedCryptoData;

	@EncryptionDataReadState private int mEncryptionDataReadState;		@EncryptionDataReadState private int mEncryptionDataReadState;
	private int mEncryptionDataSizeToSubtractFromSampleDataSize;		private int mEncryptionDataSizeToSubtractFromSampleDataSize;
	private int mEncryptionVectorSize;		private int mEncryptionVectorSize;
			private byte[] mScratchIvSpace;
			private int mSubsampleEncryptionDataSize;
			private int[] mScratchSubsampleEncryptedBytesCount;
			private int[] mScratchSubsampleClearBytesCount;
	private boolean mHasSubsampleEncryptionData;		private boolean mHasSubsampleEncryptionData;
	private CryptoInfo.Pattern mEncryptionPattern;
	private int mSkippedSupplementalDataBytes;		private int mSkippedSupplementalDataBytes;

	private TrackOutputAdapter(int trackIndex) {		private TrackOutputAdapter(int trackIndex) {
	mTrackIndex = trackIndex;		mTrackIndex = trackIndex;
	mCryptoInfo = new CryptoInfo();		mScratchIvSpace = new byte[16]; // Size documented in CryptoInfo.
	mCryptoInfo.iv = new byte[16]; // Size documented in CryptoInfo.		mScratchSubsampleEncryptedBytesCount = new int[32];
	mCryptoInfo.numBytesOfClearData = new int[0];		mScratchSubsampleClearBytesCount = new int[32];
	mCryptoInfo.numBytesOfEncryptedData = new int[0];
	mEncryptionDataReadState = STATE_READING_SIGNAL_BYTE;		mEncryptionDataReadState = STATE_READING_SIGNAL_BYTE;
	mEncryptionPattern =		mLastOutputEncryptionPattern =
	new CryptoInfo.Pattern(/* blocksToEncrypt= / 0, / blocksToSkip= */ 0);		new CryptoInfo.Pattern(/* blocksToEncrypt= / 0, / blocksToSkip= */ 0);
	}		}

	@@ -1466,35 +1471,39 @@ public final class MediaParser {
	mEncryptionDataReadState = STATE_READING_INIT_VECTOR;		mEncryptionDataReadState = STATE_READING_INIT_VECTOR;
	break;		break;
	case STATE_READING_INIT_VECTOR:		case STATE_READING_INIT_VECTOR:
	Arrays.fill(mCryptoInfo.iv, (byte) 0); // Ensure 0-padding.		Arrays.fill(mScratchIvSpace, (byte) 0); // Ensure 0-padding.
	data.readBytes(mCryptoInfo.iv, /* offset= */ 0, mEncryptionVectorSize);		data.readBytes(mScratchIvSpace, /* offset= */ 0, mEncryptionVectorSize);
	length -= mEncryptionVectorSize;		length -= mEncryptionVectorSize;
	if (mHasSubsampleEncryptionData) {		if (mHasSubsampleEncryptionData) {
	mEncryptionDataReadState = STATE_READING_SUBSAMPLE_ENCRYPTION_SIZE;		mEncryptionDataReadState = STATE_READING_SUBSAMPLE_ENCRYPTION_SIZE;
	} else {		} else {
	mCryptoInfo.numSubSamples = 0;		mSubsampleEncryptionDataSize = 0;
	mEncryptionDataReadState = STATE_READING_SIGNAL_BYTE;		mEncryptionDataReadState = STATE_READING_SIGNAL_BYTE;
	}		}
	break;		break;
	case STATE_READING_SUBSAMPLE_ENCRYPTION_SIZE:		case STATE_READING_SUBSAMPLE_ENCRYPTION_SIZE:
	int numSubSamples = data.readUnsignedShort();		mSubsampleEncryptionDataSize = data.readUnsignedShort();
	mCryptoInfo.numSubSamples = numSubSamples;		if (mScratchSubsampleClearBytesCount.length
	if (mCryptoInfo.numBytesOfClearData.length < numSubSamples) {		< mSubsampleEncryptionDataSize) {
	mCryptoInfo.numBytesOfClearData = new int[numSubSamples];		mScratchSubsampleClearBytesCount =
	mCryptoInfo.numBytesOfEncryptedData = new int[numSubSamples];		new int[mSubsampleEncryptionDataSize];
			mScratchSubsampleEncryptedBytesCount =
			new int[mSubsampleEncryptionDataSize];
	}		}
	length -= 2;		length -= 2;
	mEncryptionDataSizeToSubtractFromSampleDataSize +=		mEncryptionDataSizeToSubtractFromSampleDataSize +=
	2 + numSubSamples * BYTES_PER_SUBSAMPLE_ENCRYPTION_ENTRY;		2
			+ mSubsampleEncryptionDataSize
			* BYTES_PER_SUBSAMPLE_ENCRYPTION_ENTRY;
	mEncryptionDataReadState = STATE_READING_SUBSAMPLE_ENCRYPTION_DATA;		mEncryptionDataReadState = STATE_READING_SUBSAMPLE_ENCRYPTION_DATA;
	break;		break;
	case STATE_READING_SUBSAMPLE_ENCRYPTION_DATA:		case STATE_READING_SUBSAMPLE_ENCRYPTION_DATA:
	for (int i = 0; i < mCryptoInfo.numSubSamples; i++) {		for (int i = 0; i < mSubsampleEncryptionDataSize; i++) {
	mCryptoInfo.numBytesOfClearData[i] = data.readUnsignedShort();		mScratchSubsampleClearBytesCount[i] = data.readUnsignedShort();
	mCryptoInfo.numBytesOfEncryptedData[i] = data.readInt();		mScratchSubsampleEncryptedBytesCount[i] = data.readInt();
	}		}
	length -=		length -=
	mCryptoInfo.numSubSamples		mSubsampleEncryptionDataSize
	* BYTES_PER_SUBSAMPLE_ENCRYPTION_ENTRY;		* BYTES_PER_SUBSAMPLE_ENCRYPTION_ENTRY;
	mEncryptionDataReadState = STATE_READING_SIGNAL_BYTE;		mEncryptionDataReadState = STATE_READING_SIGNAL_BYTE;
	if (length != 0) {		if (length != 0) {
	@@ -1536,24 +1545,71 @@ public final class MediaParser {
	if (cryptoData == null) {		if (cryptoData == null) {
	// The sample is not encrypted.		// The sample is not encrypted.
	return null;		return null;
	}		} else if (mInBandCryptoInfo) {
	mCryptoInfo.key = cryptoData.encryptionKey;		if (cryptoData != mLastReceivedCryptoData) {
	// ExoPlayer modes match MediaCodec modes.		mLastOutputCryptoInfo =
	mCryptoInfo.mode = cryptoData.cryptoMode;		createNewCryptoInfoAndPopulateWithCryptoData(cryptoData);
	if (cryptoData.clearBlocks != 0) {		}
	// Content is pattern-encrypted.		} else /* We must populate the full CryptoInfo. */ {
	mCryptoInfo.setPattern(mEncryptionPattern);		// CryptoInfo.pattern is not accessible to the user, so the user needs to feed
	mEncryptionPattern.set(cryptoData.encryptedBlocks, cryptoData.clearBlocks);		// this CryptoInfo directly to MediaCodec. We need to create a new CryptoInfo per
			// sample because of per-sample initialization vector changes.
			CryptoInfo newCryptoInfo = createNewCryptoInfoAndPopulateWithCryptoData(cryptoData);
			newCryptoInfo.iv = Arrays.copyOf(mScratchIvSpace, mScratchIvSpace.length);
			boolean canReuseSubsampleInfo =
			mLastOutputCryptoInfo != null
			&& mLastOutputCryptoInfo.numSubSamples
			== mSubsampleEncryptionDataSize;
			for (int i = 0; i < mSubsampleEncryptionDataSize && canReuseSubsampleInfo; i++) {
			canReuseSubsampleInfo =
			mLastOutputCryptoInfo.numBytesOfClearData[i]
			== mScratchSubsampleClearBytesCount[i]
			&& mLastOutputCryptoInfo.numBytesOfEncryptedData[i]
			== mScratchSubsampleEncryptedBytesCount[i];
			}
			newCryptoInfo.numSubSamples = mSubsampleEncryptionDataSize;
			if (canReuseSubsampleInfo) {
			newCryptoInfo.numBytesOfClearData = mLastOutputCryptoInfo.numBytesOfClearData;
			newCryptoInfo.numBytesOfEncryptedData =
			mLastOutputCryptoInfo.numBytesOfEncryptedData;
	} else {		} else {
	mCryptoInfo.setPattern(null);		newCryptoInfo.numBytesOfClearData =
			Arrays.copyOf(
			mScratchSubsampleClearBytesCount, mSubsampleEncryptionDataSize);
			newCryptoInfo.numBytesOfEncryptedData =
			Arrays.copyOf(
			mScratchSubsampleEncryptedBytesCount,
			mSubsampleEncryptionDataSize);
			}
			mLastOutputCryptoInfo = newCryptoInfo;
	}		}
	return mCryptoInfo;		mLastReceivedCryptoData = cryptoData;
			return mLastOutputCryptoInfo;
			}

			private CryptoInfo createNewCryptoInfoAndPopulateWithCryptoData(CryptoData cryptoData) {
			CryptoInfo cryptoInfo = new CryptoInfo();
			cryptoInfo.key = cryptoData.encryptionKey;
			cryptoInfo.mode = cryptoData.cryptoMode;
			if (cryptoData.clearBlocks != mLastOutputEncryptionPattern.getSkipBlocks()
			\|\| cryptoData.encryptedBlocks
			!= mLastOutputEncryptionPattern.getEncryptBlocks()) {
			mLastOutputEncryptionPattern =
			new CryptoInfo.Pattern(cryptoData.encryptedBlocks, cryptoData.clearBlocks);
			}
			cryptoInfo.setPattern(mLastOutputEncryptionPattern);
			return cryptoInfo;
	}		}

	private void outputSampleData(ParsableByteArray data, int length) {		private void outputSampleData(ParsableByteArray data, int length) {
	mScratchParsableByteArrayAdapter.resetWithByteArray(data, length);		mScratchParsableByteArrayAdapter.resetWithByteArray(data, length);
	try {		try {
	mOutputConsumer.onSampleDataFound(mTrackIndex, mScratchParsableByteArrayAdapter);		// Read all bytes from data. ExoPlayer extractors expect all sample data to be
			// consumed by TrackOutput implementations when passing a ParsableByteArray.
			while (mScratchParsableByteArrayAdapter.getLength() > 0) {
			mOutputConsumer.onSampleDataFound(
			mTrackIndex, mScratchParsableByteArrayAdapter);
			}
	} catch (IOException e) {		} catch (IOException e) {
	// Unexpected.		// Unexpected.
	throw new RuntimeException(e);		throw new RuntimeException(e);