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

Example 96 with ExtractorInput

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

the class FlvExtractor method readTagData.

/**
 * Reads the body of a tag from the provided {@link ExtractorInput}.
 *
 * @param input The {@link ExtractorInput} from which to read.
 * @return True if the data was consumed by a reader. False if it was skipped.
 * @throws IOException If an error occurred reading or parsing data from the source.
 */
@RequiresNonNull("extractorOutput")
private boolean readTagData(ExtractorInput input) throws IOException {
    boolean wasConsumed = true;
    boolean wasSampleOutput = false;
    long timestampUs = getCurrentTimestampUs();
    if (tagType == TAG_TYPE_AUDIO && audioReader != null) {
        ensureReadyForMediaOutput();
        wasSampleOutput = audioReader.consume(prepareTagData(input), timestampUs);
    } else if (tagType == TAG_TYPE_VIDEO && videoReader != null) {
        ensureReadyForMediaOutput();
        wasSampleOutput = videoReader.consume(prepareTagData(input), timestampUs);
    } else if (tagType == TAG_TYPE_SCRIPT_DATA && !outputSeekMap) {
        wasSampleOutput = metadataReader.consume(prepareTagData(input), timestampUs);
        long durationUs = metadataReader.getDurationUs();
        if (durationUs != C.TIME_UNSET) {
            extractorOutput.seekMap(new IndexSeekMap(metadataReader.getKeyFrameTagPositions(), metadataReader.getKeyFrameTimesUs(), durationUs));
            outputSeekMap = true;
        }
    } else {
        input.skipFully(tagDataSize);
        wasConsumed = false;
    }
    if (!outputFirstSample && wasSampleOutput) {
        outputFirstSample = true;
        mediaTagTimestampOffsetUs = metadataReader.getDurationUs() == C.TIME_UNSET ? -tagTimestampUs : 0;
    }
    // There's a 4 byte previous tag size before the next header.
    bytesToNextTagHeader = 4;
    state = STATE_SKIPPING_TO_TAG_HEADER;
    return wasConsumed;
}

Example 97 with ExtractorInput

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

the class MatroskaExtractor method writeSampleData.

/**
 * Writes data for a single sample to the track output.
 *
 * @param input The input from which to read sample data.
 * @param track The track to output the sample to.
 * @param size The size of the sample data on the input side.
 * @return The final size of the written sample.
 * @throws IOException If an error occurs reading from the input.
 */
@RequiresNonNull("#2.output")
private int writeSampleData(ExtractorInput input, Track track, int size) throws IOException {
    if (CODEC_ID_SUBRIP.equals(track.codecId)) {
        writeSubtitleSampleData(input, SUBRIP_PREFIX, size);
        return finishWriteSampleData();
    } else if (CODEC_ID_ASS.equals(track.codecId)) {
        writeSubtitleSampleData(input, SSA_PREFIX, size);
        return finishWriteSampleData();
    } else if (CODEC_ID_VTT.equals(track.codecId)) {
        writeSubtitleSampleData(input, VTT_PREFIX, size);
        return finishWriteSampleData();
    }
    TrackOutput output = track.output;
    if (!sampleEncodingHandled) {
        if (track.hasContentEncryption) {
            // If the sample is encrypted, read its encryption signal byte and set the IV size.
            // Clear the encrypted flag.
            blockFlags &= ~C.BUFFER_FLAG_ENCRYPTED;
            if (!sampleSignalByteRead) {
                input.readFully(scratch.getData(), 0, 1);
                sampleBytesRead++;
                if ((scratch.getData()[0] & 0x80) == 0x80) {
                    throw ParserException.createForMalformedContainer("Extension bit is set in signal byte", /* cause= */
                    null);
                }
                sampleSignalByte = scratch.getData()[0];
                sampleSignalByteRead = true;
            }
            boolean isEncrypted = (sampleSignalByte & 0x01) == 0x01;
            if (isEncrypted) {
                boolean hasSubsampleEncryption = (sampleSignalByte & 0x02) == 0x02;
                blockFlags |= C.BUFFER_FLAG_ENCRYPTED;
                if (!sampleInitializationVectorRead) {
                    input.readFully(encryptionInitializationVector.getData(), 0, ENCRYPTION_IV_SIZE);
                    sampleBytesRead += ENCRYPTION_IV_SIZE;
                    sampleInitializationVectorRead = true;
                    // Write the signal byte, containing the IV size and the subsample encryption flag.
                    scratch.getData()[0] = (byte) (ENCRYPTION_IV_SIZE | (hasSubsampleEncryption ? 0x80 : 0x00));
                    scratch.setPosition(0);
                    output.sampleData(scratch, 1, TrackOutput.SAMPLE_DATA_PART_ENCRYPTION);
                    sampleBytesWritten++;
                    // Write the IV.
                    encryptionInitializationVector.setPosition(0);
                    output.sampleData(encryptionInitializationVector, ENCRYPTION_IV_SIZE, TrackOutput.SAMPLE_DATA_PART_ENCRYPTION);
                    sampleBytesWritten += ENCRYPTION_IV_SIZE;
                }
                if (hasSubsampleEncryption) {
                    if (!samplePartitionCountRead) {
                        input.readFully(scratch.getData(), 0, 1);
                        sampleBytesRead++;
                        scratch.setPosition(0);
                        samplePartitionCount = scratch.readUnsignedByte();
                        samplePartitionCountRead = true;
                    }
                    int samplePartitionDataSize = samplePartitionCount * 4;
                    scratch.reset(samplePartitionDataSize);
                    input.readFully(scratch.getData(), 0, samplePartitionDataSize);
                    sampleBytesRead += samplePartitionDataSize;
                    short subsampleCount = (short) (1 + (samplePartitionCount / 2));
                    int subsampleDataSize = 2 + 6 * subsampleCount;
                    if (encryptionSubsampleDataBuffer == null || encryptionSubsampleDataBuffer.capacity() < subsampleDataSize) {
                        encryptionSubsampleDataBuffer = ByteBuffer.allocate(subsampleDataSize);
                    }
                    encryptionSubsampleDataBuffer.position(0);
                    encryptionSubsampleDataBuffer.putShort(subsampleCount);
                    // Loop through the partition offsets and write out the data in the way ExoPlayer
                    // wants it (ISO 23001-7 Part 7):
                    // 2 bytes - sub sample count.
                    // for each sub sample:
                    // 2 bytes - clear data size.
                    // 4 bytes - encrypted data size.
                    int partitionOffset = 0;
                    for (int i = 0; i < samplePartitionCount; i++) {
                        int previousPartitionOffset = partitionOffset;
                        partitionOffset = scratch.readUnsignedIntToInt();
                        if ((i % 2) == 0) {
                            encryptionSubsampleDataBuffer.putShort((short) (partitionOffset - previousPartitionOffset));
                        } else {
                            encryptionSubsampleDataBuffer.putInt(partitionOffset - previousPartitionOffset);
                        }
                    }
                    int finalPartitionSize = size - sampleBytesRead - partitionOffset;
                    if ((samplePartitionCount % 2) == 1) {
                        encryptionSubsampleDataBuffer.putInt(finalPartitionSize);
                    } else {
                        encryptionSubsampleDataBuffer.putShort((short) finalPartitionSize);
                        encryptionSubsampleDataBuffer.putInt(0);
                    }
                    encryptionSubsampleData.reset(encryptionSubsampleDataBuffer.array(), subsampleDataSize);
                    output.sampleData(encryptionSubsampleData, subsampleDataSize, TrackOutput.SAMPLE_DATA_PART_ENCRYPTION);
                    sampleBytesWritten += subsampleDataSize;
                }
            }
        } else if (track.sampleStrippedBytes != null) {
            // If the sample has header stripping, prepare to read/output the stripped bytes first.
            sampleStrippedBytes.reset(track.sampleStrippedBytes, track.sampleStrippedBytes.length);
        }
        if (track.maxBlockAdditionId > 0) {
            blockFlags |= C.BUFFER_FLAG_HAS_SUPPLEMENTAL_DATA;
            blockAdditionalData.reset(/* limit= */
            0);
            // If there is supplemental data, the structure of the sample data is:
            // sample size (4 bytes) || sample data || supplemental data
            scratch.reset(/* limit= */
            4);
            scratch.getData()[0] = (byte) ((size >> 24) & 0xFF);
            scratch.getData()[1] = (byte) ((size >> 16) & 0xFF);
            scratch.getData()[2] = (byte) ((size >> 8) & 0xFF);
            scratch.getData()[3] = (byte) (size & 0xFF);
            output.sampleData(scratch, 4, TrackOutput.SAMPLE_DATA_PART_SUPPLEMENTAL);
            sampleBytesWritten += 4;
        }
        sampleEncodingHandled = true;
    }
    size += sampleStrippedBytes.limit();
    if (CODEC_ID_H264.equals(track.codecId) || CODEC_ID_H265.equals(track.codecId)) {
        // TODO: Deduplicate with Mp4Extractor.
        // Zero the top three bytes of the array that we'll use to decode nal unit lengths, in case
        // they're only 1 or 2 bytes long.
        byte[] nalLengthData = nalLength.getData();
        nalLengthData[0] = 0;
        nalLengthData[1] = 0;
        nalLengthData[2] = 0;
        int nalUnitLengthFieldLength = track.nalUnitLengthFieldLength;
        int nalUnitLengthFieldLengthDiff = 4 - track.nalUnitLengthFieldLength;
        // start codes as we encounter them.
        while (sampleBytesRead < size) {
            if (sampleCurrentNalBytesRemaining == 0) {
                // Read the NAL length so that we know where we find the next one.
                writeToTarget(input, nalLengthData, nalUnitLengthFieldLengthDiff, nalUnitLengthFieldLength);
                sampleBytesRead += nalUnitLengthFieldLength;
                nalLength.setPosition(0);
                sampleCurrentNalBytesRemaining = nalLength.readUnsignedIntToInt();
                // Write a start code for the current NAL unit.
                nalStartCode.setPosition(0);
                output.sampleData(nalStartCode, 4);
                sampleBytesWritten += 4;
            } else {
                // Write the payload of the NAL unit.
                int bytesWritten = writeToOutput(input, output, sampleCurrentNalBytesRemaining);
                sampleBytesRead += bytesWritten;
                sampleBytesWritten += bytesWritten;
                sampleCurrentNalBytesRemaining -= bytesWritten;
            }
        }
    } else {
        if (track.trueHdSampleRechunker != null) {
            checkState(sampleStrippedBytes.limit() == 0);
            track.trueHdSampleRechunker.startSample(input);
        }
        while (sampleBytesRead < size) {
            int bytesWritten = writeToOutput(input, output, size - sampleBytesRead);
            sampleBytesRead += bytesWritten;
            sampleBytesWritten += bytesWritten;
        }
    }
    if (CODEC_ID_VORBIS.equals(track.codecId)) {
        // Vorbis decoder in android MediaCodec [1] expects the last 4 bytes of the sample to be the
        // number of samples in the current page. This definition holds good only for Ogg and
        // irrelevant for Matroska. So we always set this to -1 (the decoder will ignore this value if
        // we set it to -1). The android platform media extractor [2] does the same.
        // [1]
        // https://android.googlesource.com/platform/frameworks/av/+/lollipop-release/media/libstagefright/codecs/vorbis/dec/SoftVorbis.cpp#314
        // [2]
        // https://android.googlesource.com/platform/frameworks/av/+/lollipop-release/media/libstagefright/NuMediaExtractor.cpp#474
        vorbisNumPageSamples.setPosition(0);
        output.sampleData(vorbisNumPageSamples, 4);
        sampleBytesWritten += 4;
    }
    return finishWriteSampleData();
}

Example 98 with ExtractorInput

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

the class FlacMetadataReaderTest method readSeekTableMetadataBlock_returnsCorrectSeekPoints.

@Test
public void readSeekTableMetadataBlock_returnsCorrectSeekPoints() throws Exception {
    ExtractorInput input = buildExtractorInput("media/flac/bear.flac");
    // Skip to seek table block.
    input.skipFully(FlacConstants.STREAM_MARKER_SIZE + FlacConstants.STREAM_INFO_BLOCK_SIZE);
    int seekTableBlockSize = 598;
    ParsableByteArray scratch = new ParsableByteArray(seekTableBlockSize);
    input.read(scratch.getData(), 0, seekTableBlockSize);
    FlacStreamMetadata.SeekTable seekTable = FlacMetadataReader.readSeekTableMetadataBlock(scratch);
    assertThat(seekTable.pointOffsets[0]).isEqualTo(0);
    assertThat(seekTable.pointSampleNumbers[0]).isEqualTo(0);
    assertThat(seekTable.pointOffsets[31]).isEqualTo(160602);
    assertThat(seekTable.pointSampleNumbers[31]).isEqualTo(126976);
}

Example 99 with ExtractorInput

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

the class ExtractorUtilTest method peekFullyQuietly_endNotReached_isTrueAndPeeksData.

@Test
public void peekFullyQuietly_endNotReached_isTrueAndPeeksData() throws Exception {
    FakeDataSource testDataSource = new FakeDataSource();
    testDataSource.getDataSet().newDefaultData().appendReadData(Arrays.copyOf(TEST_DATA, 3)).appendReadData(Arrays.copyOfRange(TEST_DATA, 3, 6)).appendReadData(Arrays.copyOfRange(TEST_DATA, 6, 9));
    testDataSource.open(new DataSpec(Uri.parse(TEST_URI)));
    ExtractorInput input = new DefaultExtractorInput(testDataSource, 0, C.LENGTH_UNSET);
    byte[] target = new byte[TEST_DATA.length];
    int offset = 2;
    int length = 4;
    boolean hasRead = ExtractorUtil.peekFullyQuietly(input, target, offset, length, /* allowEndOfInput= */
    false);
    assertThat(hasRead).isTrue();
    assertThat(input.getPeekPosition()).isEqualTo(length);
    assertThat(Arrays.copyOfRange(target, offset, offset + length)).isEqualTo(Arrays.copyOf(TEST_DATA, length));
}

Example 100 with ExtractorInput

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

the class ExtractorUtilTest method readFullyQuietly_endReached_isFalse.

@Test
public void readFullyQuietly_endReached_isFalse() throws Exception {
    FakeDataSource testDataSource = new FakeDataSource();
    testDataSource.getDataSet().newDefaultData().appendReadData(Arrays.copyOf(TEST_DATA, 3));
    testDataSource.open(new DataSpec(Uri.parse(TEST_URI)));
    ExtractorInput input = new DefaultExtractorInput(testDataSource, 0, C.LENGTH_UNSET);
    byte[] target = new byte[TEST_DATA.length];
    int offset = 0;
    int length = TEST_DATA.length + 1;
    boolean hasRead = ExtractorUtil.readFullyQuietly(input, target, offset, length);
    assertThat(hasRead).isFalse();
    assertThat(input.getPosition()).isEqualTo(0);
}