Merge "Merge "Fix some javadoc issues." into rvc-dev am: ae5a3ee6df am:... (d3954324) · Commits · e / os / android_frameworks_base

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

+56 −25

Original line number	Diff line number	Diff line
		@@ -94,61 +94,84 @@ import java.util.Map;
		* which extracts and publishes all video samples:
		*
		* <pre>
		*
		* class VideoOutputConsumer implements MediaParser.OutputConsumer {
		*
		* private static final int MAXIMUM_SAMPLE_SIZE = ...;
		* private byte[] sampleDataBuffer = new byte[MAXIMUM_SAMPLE_SIZE];
		* private byte[] sampleDataBuffer = new byte[4096];
		* private byte[] discardedDataBuffer = new byte[4096];
		* private int videoTrackIndex = -1;
		* private int bytesWrittenCount = 0;
		*
		* \@Override
		* public void onSeekMap(int i, @NonNull MediaFormat mediaFormat) { \/* Do nothing. *\/ }
		* @Override
		* public void onSeekMap(int i, @NonNull MediaFormat mediaFormat) {
		* // Do nothing.
		* }
		*
		* \@Override
		* public void onTrackData(int i, @NonNull TrackData trackData) {
		* @Override
		* public void onTrackData(int i, @NonNull TrackData trackData) {
		* MediaFormat mediaFormat = trackData.mediaFormat;
		* if (videoTrackIndex == -1 && mediaFormat
		* .getString(MediaFormat.KEY_MIME, \/* defaultValue= *\/ "").startsWith("video/")) {
		* if (videoTrackIndex == -1 &&
		* mediaFormat
		* .getString(MediaFormat.KEY_MIME, /* defaultValue= */ "")
		* .startsWith("video/")) {
		* videoTrackIndex = i;
		* }
		* }
		*
		* \@Override
		* public void onSampleData(int trackIndex, @NonNull InputReader inputReader)
		* @Override
		* public void onSampleData(int trackIndex, @NonNull InputReader inputReader)
		* throws IOException, InterruptedException {
		* int numberOfBytesToRead = (int) inputReader.getLength();
		* if (videoTrackIndex != trackIndex) {
		* // Discard contents.
		* inputReader.read(\/* bytes= \/ null, \/ offset= *\/ 0, numberOfBytesToRead);
		* }
		* int bytesRead = inputReader.read(sampleDataBuffer, bytesWrittenCount, numberOfBytesToRead);
		* inputReader.read(
		* discardedDataBuffer,
		* /* offset= */ 0,
		* Math.min(discardDataBuffer.length, numberOfBytesToRead));
		* } else {
		* ensureSpaceInBuffer(numberOfBytesToRead);
		* int bytesRead = inputReader.read(
		* sampleDataBuffer, bytesWrittenCount, numberOfBytesToRead);
		* bytesWrittenCount += bytesRead;
		* }
		* }
		*
		* \@Override
		* @Override
		* public void onSampleCompleted(
		* int trackIndex,
		* long timeUs,
		* int flags,
		* int size,
		* int offset,
		* \@Nullable CryptoInfo cryptoData) {
		* @Nullable CryptoInfo cryptoData) {
		* if (videoTrackIndex != trackIndex) {
		* return; // It's not the video track. Ignore.
		* }
		* byte[] sampleData = new byte[size];
		* System.arraycopy(sampleDataBuffer, bytesWrittenCount - size - offset, sampleData, \/*
		* destPos= *\/ 0, size);
		* int sampleStartOffset = bytesWrittenCount - size - offset;
		* System.arraycopy(
		* sampleDataBuffer,
		* sampleStartOffset,
		* sampleData,
		* /* destPos= */ 0,
		* size);
		* // Place trailing bytes at the start of the buffer.
		* System.arraycopy(
		* sampleDataBuffer,
		* bytesWrittenCount - offset,
		* sampleDataBuffer,
		* \/* destPos= *\/ 0,
		* \/* size= *\/ offset);
		* /* destPos= */ 0,
		* /* size= */ offset);
		* bytesWrittenCount = bytesWrittenCount - offset;
		* publishSample(sampleData, timeUs, flags);
		* }
		*
		* private void ensureSpaceInBuffer(int numberOfBytesToRead) {
		* int requiredLength = bytesWrittenCount + numberOfBytesToRead;
		* if (requiredLength > sampleDataBuffer.length) {
		* sampleDataBuffer = Arrays.copyOf(sampleDataBuffer, requiredLength);
		* }
		* }
		*
		* }
		*
		* </pre>
		@@ -342,11 +365,16 @@ public final class MediaParser {
		/**
		* Called to write sample data to the output.
		*
		* <p>Implementers must attempt to consume the entirety of the input, but should surface any
		* thrown {@link IOException} caused by reading from {@code input}.
		* <p>If the invocation of this method returns before the entire {@code inputReader} {@link
		* InputReader#getLength() length} is consumed, the method will be called again for the
		* implementer to read the remaining data. Implementers should surface any thrown {@link
		* IOException} caused by reading from {@code input}.
		*
		* @param trackIndex The index of the track to which the sample data corresponds.
		* @param inputReader The {@link InputReader} from which to read the data.
		* @throws IOException If an exception occurs while reading from {@code inputReader}.
		* @throws InterruptedException If an interruption occurs while reading from {@code
		* inputReader}.
		*/
		void onSampleData(int trackIndex, @NonNull InputReader inputReader)
		throws IOException, InterruptedException;
		@@ -361,8 +389,9 @@ public final class MediaParser {
		* @param flags Flags associated with the sample. See {@link MediaCodec
		* MediaCodec.BUFFER_FLAG_*}.
		* @param size The size of the sample data, in bytes.
		* @param offset The number of bytes that have been passed to {@link #onSampleData} since
		* the last byte belonging to the sample whose metadata is being passed.
		* @param offset The number of bytes that have been consumed by {@code onSampleData(int,
		* MediaParser.InputReader)} for the specified track, since the last byte belonging to
		* the sample whose metadata is being passed.
		* @param cryptoData Encryption data required to decrypt the sample. May be null for
		* unencrypted samples.
		*/
		@@ -684,7 +713,9 @@ public final class MediaParser {
		* container data.
		* @return Whether there is any data left to extract. Returns false if the end of input has been
		* reached.
		* @throws UnrecognizedInputFormatException
		* @throws IOException If an error occurs while reading from the {@link SeekableInputReader}.
		* @throws UnrecognizedInputFormatException If the format cannot be recognized by any of the
		* underlying parser implementations.
		*/
		public boolean advance(@NonNull SeekableInputReader seekableInputReader)
		throws IOException, InterruptedException {