Examples with SampleNumberHolder com.google.android.exoplayer2.extractor.FlacFrameReader.SampleNumberHolder used on opensource projects

Example 1 with SampleNumberHolder

use of com.google.android.exoplayer2.extractor.FlacFrameReader.SampleNumberHolder in project ExoPlayer by google.

the class FlacFrameReader method checkFrameHeaderFromPeek.

/**
 * Checks whether the given FLAC frame header is valid and, if so, writes the frame first sample
 * number in {@code sampleNumberHolder}.
 *
 * <p>The {@code input} peek position is left unchanged.
 *
 * @param input The input to get the data from, whose peek position must correspond to the frame
 *     header.
 * @param flacStreamMetadata The stream metadata.
 * @param frameStartMarker The frame start marker of the stream.
 * @param sampleNumberHolder The holder used to contain the sample number.
 * @return Whether the frame header is valid.
 */
public static boolean checkFrameHeaderFromPeek(ExtractorInput input, FlacStreamMetadata flacStreamMetadata, int frameStartMarker, SampleNumberHolder sampleNumberHolder) throws IOException {
    long originalPeekPosition = input.getPeekPosition();
    byte[] frameStartBytes = new byte[2];
    input.peekFully(frameStartBytes, 0, 2);
    int frameStart = (frameStartBytes[0] & 0xFF) << 8 | (frameStartBytes[1] & 0xFF);
    if (frameStart != frameStartMarker) {
        input.resetPeekPosition();
        input.advancePeekPosition((int) (originalPeekPosition - input.getPosition()));
        return false;
    }
    ParsableByteArray scratch = new ParsableByteArray(FlacConstants.MAX_FRAME_HEADER_SIZE);
    System.arraycopy(frameStartBytes, /* srcPos= */
    0, scratch.getData(), /* destPos= */
    0, /* length= */
    2);
    int totalBytesPeeked = ExtractorUtil.peekToLength(input, scratch.getData(), 2, FlacConstants.MAX_FRAME_HEADER_SIZE - 2);
    scratch.setLimit(totalBytesPeeked);
    input.resetPeekPosition();
    input.advancePeekPosition((int) (originalPeekPosition - input.getPosition()));
    return checkAndReadFrameHeader(scratch, flacStreamMetadata, frameStartMarker, sampleNumberHolder);
}

Example 2 with SampleNumberHolder

use of com.google.android.exoplayer2.extractor.FlacFrameReader.SampleNumberHolder in project ExoPlayer by google.

the class FlacFrameReader method getFirstSampleNumber.

/**
 * Returns the number of the first sample in the given frame.
 *
 * <p>The read position of {@code input} is left unchanged.
 *
 * <p>If no exception is thrown, the peek position is aligned with the read position. Otherwise,
 * there is no guarantee on the peek position.
 *
 * @param input Input stream to get the sample number from (starting from the read position).
 * @return The frame first sample number.
 * @throws ParserException If an error occurs parsing the sample number.
 * @throws IOException If peeking from the input fails.
 */
public static long getFirstSampleNumber(ExtractorInput input, FlacStreamMetadata flacStreamMetadata) throws IOException {
    input.resetPeekPosition();
    input.advancePeekPosition(1);
    byte[] blockingStrategyByte = new byte[1];
    input.peekFully(blockingStrategyByte, 0, 1);
    boolean isBlockSizeVariable = (blockingStrategyByte[0] & 1) == 1;
    input.advancePeekPosition(2);
    int maxUtf8SampleNumberSize = isBlockSizeVariable ? 7 : 6;
    ParsableByteArray scratch = new ParsableByteArray(maxUtf8SampleNumberSize);
    int totalBytesPeeked = ExtractorUtil.peekToLength(input, scratch.getData(), 0, maxUtf8SampleNumberSize);
    scratch.setLimit(totalBytesPeeked);
    input.resetPeekPosition();
    SampleNumberHolder sampleNumberHolder = new SampleNumberHolder();
    if (!checkAndReadFirstSampleNumber(scratch, flacStreamMetadata, isBlockSizeVariable, sampleNumberHolder)) {
        throw ParserException.createForMalformedContainer(/* message= */
        null, /* cause= */
        null);
    }
    return sampleNumberHolder.sampleNumber;
}

Example 3 with SampleNumberHolder

use of com.google.android.exoplayer2.extractor.FlacFrameReader.SampleNumberHolder in project ExoPlayer by google.

the class FlacFrameReaderTest method checkAndReadFrameHeader_validData_isTrue.

@Test
public void checkAndReadFrameHeader_validData_isTrue() throws Exception {
    FlacStreamMetadataHolder streamMetadataHolder = new FlacStreamMetadataHolder(/* flacStreamMetadata= */
    null);
    ExtractorInput input = buildExtractorInputReadingFromFirstFrame("media/flac/bear_one_metadata_block.flac", streamMetadataHolder);
    int frameStartMarker = FlacMetadataReader.getFrameStartMarker(input);
    ParsableByteArray scratch = new ParsableByteArray(FlacConstants.MAX_FRAME_HEADER_SIZE);
    input.read(scratch.getData(), 0, FlacConstants.MAX_FRAME_HEADER_SIZE);
    boolean result = FlacFrameReader.checkAndReadFrameHeader(scratch, streamMetadataHolder.flacStreamMetadata, frameStartMarker, new SampleNumberHolder());
    assertThat(result).isTrue();
}

Example 4 with SampleNumberHolder

use of com.google.android.exoplayer2.extractor.FlacFrameReader.SampleNumberHolder in project ExoPlayer by google.

the class FlacFrameReaderTest method checkFrameHeaderFromPeek_validData_isTrue.

@Test
public void checkFrameHeaderFromPeek_validData_isTrue() throws Exception {
    FlacStreamMetadataHolder streamMetadataHolder = new FlacStreamMetadataHolder(/* flacStreamMetadata= */
    null);
    ExtractorInput input = buildExtractorInputReadingFromFirstFrame("media/flac/bear_one_metadata_block.flac", streamMetadataHolder);
    int frameStartMarker = FlacMetadataReader.getFrameStartMarker(input);
    boolean result = FlacFrameReader.checkFrameHeaderFromPeek(input, streamMetadataHolder.flacStreamMetadata, frameStartMarker, new SampleNumberHolder());
    assertThat(result).isTrue();
}

Example 5 with SampleNumberHolder

use of com.google.android.exoplayer2.extractor.FlacFrameReader.SampleNumberHolder in project ExoPlayer by google.

the class FlacFrameReaderTest method checkAndReadFrameHeader_invalidData_isFalse.

@Test
public void checkAndReadFrameHeader_invalidData_isFalse() throws Exception {
    FlacStreamMetadataHolder streamMetadataHolder = new FlacStreamMetadataHolder(/* flacStreamMetadata= */
    null);
    ExtractorInput input = buildExtractorInputReadingFromFirstFrame("media/flac/bear_one_metadata_block.flac", streamMetadataHolder);
    ParsableByteArray scratch = new ParsableByteArray(FlacConstants.MAX_FRAME_HEADER_SIZE);
    input.read(scratch.getData(), 0, FlacConstants.MAX_FRAME_HEADER_SIZE);
    // The first bytes of the frame are not equal to the frame start marker.
    boolean result = FlacFrameReader.checkAndReadFrameHeader(scratch, streamMetadataHolder.flacStreamMetadata, /* frameStartMarker= */
    -1, new SampleNumberHolder());
    assertThat(result).isFalse();
}