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android / platform / prebuilts / fullsdk / sources / refs/heads/androidx-media-release / . / android-34 / com / google / android / exoplayer2 / extractor / mkv / MatroskaExtractor.java
blob: e8876ca52c4f88ff58d91335055e927e1a117410 [file] [log] [blame]
/*
* Copyright (C) 2016 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.google.android.exoplayer2.extractor.mkv;
import static com.google.android.exoplayer2.util.Assertions.checkArgument;
import static com.google.android.exoplayer2.util.Assertions.checkNotNull;
import static com.google.android.exoplayer2.util.Assertions.checkState;
import static com.google.android.exoplayer2.util.Assertions.checkStateNotNull;
import static java.lang.Math.max;
import static java.lang.Math.min;
import android.util.Pair;
import android.util.SparseArray;
import androidx.annotation.CallSuper;
import androidx.annotation.IntDef;
import androidx.annotation.Nullable;
import com.google.android.exoplayer2.C;
import com.google.android.exoplayer2.Format;
import com.google.android.exoplayer2.ParserException;
import com.google.android.exoplayer2.audio.AacUtil;
import com.google.android.exoplayer2.audio.MpegAudioUtil;
import com.google.android.exoplayer2.drm.DrmInitData;
import com.google.android.exoplayer2.drm.DrmInitData.SchemeData;
import com.google.android.exoplayer2.extractor.ChunkIndex;
import com.google.android.exoplayer2.extractor.Extractor;
import com.google.android.exoplayer2.extractor.ExtractorInput;
import com.google.android.exoplayer2.extractor.ExtractorOutput;
import com.google.android.exoplayer2.extractor.ExtractorsFactory;
import com.google.android.exoplayer2.extractor.PositionHolder;
import com.google.android.exoplayer2.extractor.SeekMap;
import com.google.android.exoplayer2.extractor.TrackOutput;
import com.google.android.exoplayer2.extractor.TrueHdSampleRechunker;
import com.google.android.exoplayer2.util.Log;
import com.google.android.exoplayer2.util.LongArray;
import com.google.android.exoplayer2.util.MimeTypes;
import com.google.android.exoplayer2.util.NalUnitUtil;
import com.google.android.exoplayer2.util.ParsableByteArray;
import com.google.android.exoplayer2.util.Util;
import com.google.android.exoplayer2.video.AvcConfig;
import com.google.android.exoplayer2.video.ColorInfo;
import com.google.android.exoplayer2.video.DolbyVisionConfig;
import com.google.android.exoplayer2.video.HevcConfig;
import com.google.common.collect.ImmutableList;
import java.io.IOException;
import java.lang.annotation.Documented;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Locale;
import java.util.Map;
import java.util.UUID;
import org.checkerframework.checker.nullness.compatqual.NullableType;
import org.checkerframework.checker.nullness.qual.EnsuresNonNull;
import org.checkerframework.checker.nullness.qual.MonotonicNonNull;
import org.checkerframework.checker.nullness.qual.RequiresNonNull;
/** Extracts data from the Matroska and WebM container formats. */
public class MatroskaExtractor implements Extractor {
/** Factory for {@link MatroskaExtractor} instances. */
public static final ExtractorsFactory FACTORY = () -> new Extractor[] {new MatroskaExtractor()};
/**
* Flags controlling the behavior of the extractor. Possible flag value is {@link
* #FLAG_DISABLE_SEEK_FOR_CUES}.
*/
@Documented
@Retention(RetentionPolicy.SOURCE)
@IntDef(
flag = true,
value = {FLAG_DISABLE_SEEK_FOR_CUES})
public @interface Flags {}
/**
* Flag to disable seeking for cues.
*
* <p>Normally (i.e. when this flag is not set) the extractor will seek to the cues element if its
* position is specified in the seek head and if it's after the first cluster. Setting this flag
* disables seeking to the cues element. If the cues element is after the first cluster then the
* media is treated as being unseekable.
*/
public static final int FLAG_DISABLE_SEEK_FOR_CUES = 1;
private static final String TAG = "MatroskaExtractor";
private static final int UNSET_ENTRY_ID = -1;
private static final int BLOCK_STATE_START = 0;
private static final int BLOCK_STATE_HEADER = 1;
private static final int BLOCK_STATE_DATA = 2;
private static final String DOC_TYPE_MATROSKA = "matroska";
private static final String DOC_TYPE_WEBM = "webm";
private static final String CODEC_ID_VP8 = "V_VP8";
private static final String CODEC_ID_VP9 = "V_VP9";
private static final String CODEC_ID_AV1 = "V_AV1";
private static final String CODEC_ID_MPEG2 = "V_MPEG2";
private static final String CODEC_ID_MPEG4_SP = "V_MPEG4/ISO/SP";
private static final String CODEC_ID_MPEG4_ASP = "V_MPEG4/ISO/ASP";
private static final String CODEC_ID_MPEG4_AP = "V_MPEG4/ISO/AP";
private static final String CODEC_ID_H264 = "V_MPEG4/ISO/AVC";
private static final String CODEC_ID_H265 = "V_MPEGH/ISO/HEVC";
private static final String CODEC_ID_FOURCC = "V_MS/VFW/FOURCC";
private static final String CODEC_ID_THEORA = "V_THEORA";
private static final String CODEC_ID_VORBIS = "A_VORBIS";
private static final String CODEC_ID_OPUS = "A_OPUS";
private static final String CODEC_ID_AAC = "A_AAC";
private static final String CODEC_ID_MP2 = "A_MPEG/L2";
private static final String CODEC_ID_MP3 = "A_MPEG/L3";
private static final String CODEC_ID_AC3 = "A_AC3";
private static final String CODEC_ID_E_AC3 = "A_EAC3";
private static final String CODEC_ID_TRUEHD = "A_TRUEHD";
private static final String CODEC_ID_DTS = "A_DTS";
private static final String CODEC_ID_DTS_EXPRESS = "A_DTS/EXPRESS";
private static final String CODEC_ID_DTS_LOSSLESS = "A_DTS/LOSSLESS";
private static final String CODEC_ID_FLAC = "A_FLAC";
private static final String CODEC_ID_ACM = "A_MS/ACM";
private static final String CODEC_ID_PCM_INT_LIT = "A_PCM/INT/LIT";
private static final String CODEC_ID_PCM_INT_BIG = "A_PCM/INT/BIG";
private static final String CODEC_ID_PCM_FLOAT = "A_PCM/FLOAT/IEEE";
private static final String CODEC_ID_SUBRIP = "S_TEXT/UTF8";
private static final String CODEC_ID_ASS = "S_TEXT/ASS";
private static final String CODEC_ID_VOBSUB = "S_VOBSUB";
private static final String CODEC_ID_PGS = "S_HDMV/PGS";
private static final String CODEC_ID_DVBSUB = "S_DVBSUB";
private static final int VORBIS_MAX_INPUT_SIZE = 8192;
private static final int OPUS_MAX_INPUT_SIZE = 5760;
private static final int ENCRYPTION_IV_SIZE = 8;
private static final int TRACK_TYPE_AUDIO = 2;
private static final int ID_EBML = 0x1A45DFA3;
private static final int ID_EBML_READ_VERSION = 0x42F7;
private static final int ID_DOC_TYPE = 0x4282;
private static final int ID_DOC_TYPE_READ_VERSION = 0x4285;
private static final int ID_SEGMENT = 0x18538067;
private static final int ID_SEGMENT_INFO = 0x1549A966;
private static final int ID_SEEK_HEAD = 0x114D9B74;
private static final int ID_SEEK = 0x4DBB;
private static final int ID_SEEK_ID = 0x53AB;
private static final int ID_SEEK_POSITION = 0x53AC;
private static final int ID_INFO = 0x1549A966;
private static final int ID_TIMECODE_SCALE = 0x2AD7B1;
private static final int ID_DURATION = 0x4489;
private static final int ID_CLUSTER = 0x1F43B675;
private static final int ID_TIME_CODE = 0xE7;
private static final int ID_SIMPLE_BLOCK = 0xA3;
private static final int ID_BLOCK_GROUP = 0xA0;
private static final int ID_BLOCK = 0xA1;
private static final int ID_BLOCK_DURATION = 0x9B;
private static final int ID_BLOCK_ADDITIONS = 0x75A1;
private static final int ID_BLOCK_MORE = 0xA6;
private static final int ID_BLOCK_ADD_ID = 0xEE;
private static final int ID_BLOCK_ADDITIONAL = 0xA5;
private static final int ID_REFERENCE_BLOCK = 0xFB;
private static final int ID_TRACKS = 0x1654AE6B;
private static final int ID_TRACK_ENTRY = 0xAE;
private static final int ID_TRACK_NUMBER = 0xD7;
private static final int ID_TRACK_TYPE = 0x83;
private static final int ID_FLAG_DEFAULT = 0x88;
private static final int ID_FLAG_FORCED = 0x55AA;
private static final int ID_DEFAULT_DURATION = 0x23E383;
private static final int ID_MAX_BLOCK_ADDITION_ID = 0x55EE;
private static final int ID_BLOCK_ADDITION_MAPPING = 0x41E4;
private static final int ID_BLOCK_ADD_ID_TYPE = 0x41E7;
private static final int ID_BLOCK_ADD_ID_EXTRA_DATA = 0x41ED;
private static final int ID_NAME = 0x536E;
private static final int ID_CODEC_ID = 0x86;
private static final int ID_CODEC_PRIVATE = 0x63A2;
private static final int ID_CODEC_DELAY = 0x56AA;
private static final int ID_SEEK_PRE_ROLL = 0x56BB;
private static final int ID_VIDEO = 0xE0;
private static final int ID_PIXEL_WIDTH = 0xB0;
private static final int ID_PIXEL_HEIGHT = 0xBA;
private static final int ID_DISPLAY_WIDTH = 0x54B0;
private static final int ID_DISPLAY_HEIGHT = 0x54BA;
private static final int ID_DISPLAY_UNIT = 0x54B2;
private static final int ID_AUDIO = 0xE1;
private static final int ID_CHANNELS = 0x9F;
private static final int ID_AUDIO_BIT_DEPTH = 0x6264;
private static final int ID_SAMPLING_FREQUENCY = 0xB5;
private static final int ID_CONTENT_ENCODINGS = 0x6D80;
private static final int ID_CONTENT_ENCODING = 0x6240;
private static final int ID_CONTENT_ENCODING_ORDER = 0x5031;
private static final int ID_CONTENT_ENCODING_SCOPE = 0x5032;
private static final int ID_CONTENT_COMPRESSION = 0x5034;
private static final int ID_CONTENT_COMPRESSION_ALGORITHM = 0x4254;
private static final int ID_CONTENT_COMPRESSION_SETTINGS = 0x4255;
private static final int ID_CONTENT_ENCRYPTION = 0x5035;
private static final int ID_CONTENT_ENCRYPTION_ALGORITHM = 0x47E1;
private static final int ID_CONTENT_ENCRYPTION_KEY_ID = 0x47E2;
private static final int ID_CONTENT_ENCRYPTION_AES_SETTINGS = 0x47E7;
private static final int ID_CONTENT_ENCRYPTION_AES_SETTINGS_CIPHER_MODE = 0x47E8;
private static final int ID_CUES = 0x1C53BB6B;
private static final int ID_CUE_POINT = 0xBB;
private static final int ID_CUE_TIME = 0xB3;
private static final int ID_CUE_TRACK_POSITIONS = 0xB7;
private static final int ID_CUE_CLUSTER_POSITION = 0xF1;
private static final int ID_LANGUAGE = 0x22B59C;
private static final int ID_PROJECTION = 0x7670;
private static final int ID_PROJECTION_TYPE = 0x7671;
private static final int ID_PROJECTION_PRIVATE = 0x7672;
private static final int ID_PROJECTION_POSE_YAW = 0x7673;
private static final int ID_PROJECTION_POSE_PITCH = 0x7674;
private static final int ID_PROJECTION_POSE_ROLL = 0x7675;
private static final int ID_STEREO_MODE = 0x53B8;
private static final int ID_COLOUR = 0x55B0;
private static final int ID_COLOUR_RANGE = 0x55B9;
private static final int ID_COLOUR_TRANSFER = 0x55BA;
private static final int ID_COLOUR_PRIMARIES = 0x55BB;
private static final int ID_MAX_CLL = 0x55BC;
private static final int ID_MAX_FALL = 0x55BD;
private static final int ID_MASTERING_METADATA = 0x55D0;
private static final int ID_PRIMARY_R_CHROMATICITY_X = 0x55D1;
private static final int ID_PRIMARY_R_CHROMATICITY_Y = 0x55D2;
private static final int ID_PRIMARY_G_CHROMATICITY_X = 0x55D3;
private static final int ID_PRIMARY_G_CHROMATICITY_Y = 0x55D4;
private static final int ID_PRIMARY_B_CHROMATICITY_X = 0x55D5;
private static final int ID_PRIMARY_B_CHROMATICITY_Y = 0x55D6;
private static final int ID_WHITE_POINT_CHROMATICITY_X = 0x55D7;
private static final int ID_WHITE_POINT_CHROMATICITY_Y = 0x55D8;
private static final int ID_LUMNINANCE_MAX = 0x55D9;
private static final int ID_LUMNINANCE_MIN = 0x55DA;
/**
* BlockAddID value for ITU T.35 metadata in a VP9 track. See also
* https://www.webmproject.org/docs/container/.
*/
private static final int BLOCK_ADDITIONAL_ID_VP9_ITU_T_35 = 4;
/**
* BlockAddIdType value for Dolby Vision configuration with profile <= 7. See also
* https://www.matroska.org/technical/codec_specs.html.
*/
private static final int BLOCK_ADD_ID_TYPE_DVCC = 0x64766343;
/**
* BlockAddIdType value for Dolby Vision configuration with profile > 7. See also
* https://www.matroska.org/technical/codec_specs.html.
*/
private static final int BLOCK_ADD_ID_TYPE_DVVC = 0x64767643;
private static final int LACING_NONE = 0;
private static final int LACING_XIPH = 1;
private static final int LACING_FIXED_SIZE = 2;
private static final int LACING_EBML = 3;
private static final int FOURCC_COMPRESSION_DIVX = 0x58564944;
private static final int FOURCC_COMPRESSION_H263 = 0x33363248;
private static final int FOURCC_COMPRESSION_VC1 = 0x31435657;
/**
* A template for the prefix that must be added to each subrip sample.
*
* <p>The display time of each subtitle is passed as {@code timeUs} to {@link
* TrackOutput#sampleMetadata}. The start and end timecodes in this template are relative to
* {@code timeUs}. Hence the start timecode is always zero. The 12 byte end timecode starting at
* {@link #SUBRIP_PREFIX_END_TIMECODE_OFFSET} is set to a placeholder value, and must be replaced
* with the duration of the subtitle.
*
* <p>Equivalent to the UTF-8 string: "1\n00:00:00,000 --> 00:00:00,000\n".
*/
private static final byte[] SUBRIP_PREFIX =
new byte[] {
49, 10, 48, 48, 58, 48, 48, 58, 48, 48, 44, 48, 48, 48, 32, 45, 45, 62, 32, 48, 48, 58, 48,
48, 58, 48, 48, 44, 48, 48, 48, 10
};
/** The byte offset of the end timecode in {@link #SUBRIP_PREFIX}. */
private static final int SUBRIP_PREFIX_END_TIMECODE_OFFSET = 19;
/**
* The value by which to divide a time in microseconds to convert it to the unit of the last value
* in a subrip timecode (milliseconds).
*/
private static final long SUBRIP_TIMECODE_LAST_VALUE_SCALING_FACTOR = 1000;
/** The format of a subrip timecode. */
private static final String SUBRIP_TIMECODE_FORMAT = "%02d:%02d:%02d,%03d";
/** Matroska specific format line for SSA subtitles. */
private static final byte[] SSA_DIALOGUE_FORMAT =
Util.getUtf8Bytes(
"Format: Start, End, "
+ "ReadOrder, Layer, Style, Name, MarginL, MarginR, MarginV, Effect, Text");
/**
* A template for the prefix that must be added to each SSA sample.
*
* <p>The display time of each subtitle is passed as {@code timeUs} to {@link
* TrackOutput#sampleMetadata}. The start and end timecodes in this template are relative to
* {@code timeUs}. Hence the start timecode is always zero. The 12 byte end timecode starting at
* {@link #SUBRIP_PREFIX_END_TIMECODE_OFFSET} is set to a placeholder value, and must be replaced
* with the duration of the subtitle.
*
* <p>Equivalent to the UTF-8 string: "Dialogue: 0:00:00:00,0:00:00:00,".
*/
private static final byte[] SSA_PREFIX =
new byte[] {
68, 105, 97, 108, 111, 103, 117, 101, 58, 32, 48, 58, 48, 48, 58, 48, 48, 58, 48, 48, 44,
48, 58, 48, 48, 58, 48, 48, 58, 48, 48, 44
};
/** The byte offset of the end timecode in {@link #SSA_PREFIX}. */
private static final int SSA_PREFIX_END_TIMECODE_OFFSET = 21;
/**
* The value by which to divide a time in microseconds to convert it to the unit of the last value
* in an SSA timecode (1/100ths of a second).
*/
private static final long SSA_TIMECODE_LAST_VALUE_SCALING_FACTOR = 10_000;
/** The format of an SSA timecode. */
private static final String SSA_TIMECODE_FORMAT = "%01d:%02d:%02d:%02d";
/** The length in bytes of a WAVEFORMATEX structure. */
private static final int WAVE_FORMAT_SIZE = 18;
/** Format tag indicating a WAVEFORMATEXTENSIBLE structure. */
private static final int WAVE_FORMAT_EXTENSIBLE = 0xFFFE;
/** Format tag for PCM. */
private static final int WAVE_FORMAT_PCM = 1;
/** Sub format for PCM. */
private static final UUID WAVE_SUBFORMAT_PCM = new UUID(0x0100000000001000L, 0x800000AA00389B71L);
/** Some HTC devices signal rotation in track names. */
private static final Map<String, Integer> TRACK_NAME_TO_ROTATION_DEGREES;
static {
Map<String, Integer> trackNameToRotationDegrees = new HashMap<>();
trackNameToRotationDegrees.put("htc_video_rotA-000", 0);
trackNameToRotationDegrees.put("htc_video_rotA-090", 90);
trackNameToRotationDegrees.put("htc_video_rotA-180", 180);
trackNameToRotationDegrees.put("htc_video_rotA-270", 270);
TRACK_NAME_TO_ROTATION_DEGREES = Collections.unmodifiableMap(trackNameToRotationDegrees);
}
private final EbmlReader reader;
private final VarintReader varintReader;
private final SparseArray<Track> tracks;
private final boolean seekForCuesEnabled;
// Temporary arrays.
private final ParsableByteArray nalStartCode;
private final ParsableByteArray nalLength;
private final ParsableByteArray scratch;
private final ParsableByteArray vorbisNumPageSamples;
private final ParsableByteArray seekEntryIdBytes;
private final ParsableByteArray sampleStrippedBytes;
private final ParsableByteArray subtitleSample;
private final ParsableByteArray encryptionInitializationVector;
private final ParsableByteArray encryptionSubsampleData;
private final ParsableByteArray blockAdditionalData;
private @MonotonicNonNull ByteBuffer encryptionSubsampleDataBuffer;
private long segmentContentSize;
private long segmentContentPosition = C.POSITION_UNSET;
private long timecodeScale = C.TIME_UNSET;
private long durationTimecode = C.TIME_UNSET;
private long durationUs = C.TIME_UNSET;
// The track corresponding to the current TrackEntry element, or null.
@Nullable private Track currentTrack;
// Whether a seek map has been sent to the output.
private boolean sentSeekMap;
// Master seek entry related elements.
private int seekEntryId;
private long seekEntryPosition;
// Cue related elements.
private boolean seekForCues;
private long cuesContentPosition = C.POSITION_UNSET;
private long seekPositionAfterBuildingCues = C.POSITION_UNSET;
private long clusterTimecodeUs = C.TIME_UNSET;
@Nullable private LongArray cueTimesUs;
@Nullable private LongArray cueClusterPositions;
private boolean seenClusterPositionForCurrentCuePoint;
// Reading state.
private boolean haveOutputSample;
// Block reading state.
private int blockState;
private long blockTimeUs;
private long blockDurationUs;
private int blockSampleIndex;
private int blockSampleCount;
private int[] blockSampleSizes;
private int blockTrackNumber;
private int blockTrackNumberLength;
@C.BufferFlags private int blockFlags;
private int blockAdditionalId;
private boolean blockHasReferenceBlock;
// Sample writing state.
private int sampleBytesRead;
private int sampleBytesWritten;
private int sampleCurrentNalBytesRemaining;
private boolean sampleEncodingHandled;
private boolean sampleSignalByteRead;
private boolean samplePartitionCountRead;
private int samplePartitionCount;
private byte sampleSignalByte;
private boolean sampleInitializationVectorRead;
// Extractor outputs.
private @MonotonicNonNull ExtractorOutput extractorOutput;
public MatroskaExtractor() {
this(0);
}
public MatroskaExtractor(@Flags int flags) {
this(new DefaultEbmlReader(), flags);
}
/* package */ MatroskaExtractor(EbmlReader reader, @Flags int flags) {
this.reader = reader;
this.reader.init(new InnerEbmlProcessor());
seekForCuesEnabled = (flags & FLAG_DISABLE_SEEK_FOR_CUES) == 0;
varintReader = new VarintReader();
tracks = new SparseArray<>();
scratch = new ParsableByteArray(4);
vorbisNumPageSamples = new ParsableByteArray(ByteBuffer.allocate(4).putInt(-1).array());
seekEntryIdBytes = new ParsableByteArray(4);
nalStartCode = new ParsableByteArray(NalUnitUtil.NAL_START_CODE);
nalLength = new ParsableByteArray(4);
sampleStrippedBytes = new ParsableByteArray();
subtitleSample = new ParsableByteArray();
encryptionInitializationVector = new ParsableByteArray(ENCRYPTION_IV_SIZE);
encryptionSubsampleData = new ParsableByteArray();
blockAdditionalData = new ParsableByteArray();
blockSampleSizes = new int[1];
}
@Override
public final boolean sniff(ExtractorInput input) throws IOException {
return new Sniffer().sniff(input);
}
@Override
public final void init(ExtractorOutput output) {
extractorOutput = output;
}
@CallSuper
@Override
public void seek(long position, long timeUs) {
clusterTimecodeUs = C.TIME_UNSET;
blockState = BLOCK_STATE_START;
reader.reset();
varintReader.reset();
resetWriteSampleData();
for (int i = 0; i < tracks.size(); i++) {
tracks.valueAt(i).reset();
}
}
@Override
public final void release() {
// Do nothing
}
@Override
public final int read(ExtractorInput input, PositionHolder seekPosition) throws IOException {
haveOutputSample = false;
boolean continueReading = true;
while (continueReading && !haveOutputSample) {
continueReading = reader.read(input);
if (continueReading && maybeSeekForCues(seekPosition, input.getPosition())) {
return Extractor.RESULT_SEEK;
}
}
if (!continueReading) {
for (int i = 0; i < tracks.size(); i++) {
Track track = tracks.valueAt(i);
track.assertOutputInitialized();
track.outputPendingSampleMetadata();
}
return Extractor.RESULT_END_OF_INPUT;
}
return Extractor.RESULT_CONTINUE;
}
/**
* Maps an element ID to a corresponding type.
*
* @see EbmlProcessor#getElementType(int)
*/
@CallSuper
@EbmlProcessor.ElementType
protected int getElementType(int id) {
switch (id) {
case ID_EBML:
case ID_SEGMENT:
case ID_SEEK_HEAD:
case ID_SEEK:
case ID_INFO:
case ID_CLUSTER:
case ID_TRACKS:
case ID_TRACK_ENTRY:
case ID_BLOCK_ADDITION_MAPPING:
case ID_AUDIO:
case ID_VIDEO:
case ID_CONTENT_ENCODINGS:
case ID_CONTENT_ENCODING:
case ID_CONTENT_COMPRESSION:
case ID_CONTENT_ENCRYPTION:
case ID_CONTENT_ENCRYPTION_AES_SETTINGS:
case ID_CUES:
case ID_CUE_POINT:
case ID_CUE_TRACK_POSITIONS:
case ID_BLOCK_GROUP:
case ID_BLOCK_ADDITIONS:
case ID_BLOCK_MORE:
case ID_PROJECTION:
case ID_COLOUR:
case ID_MASTERING_METADATA:
return EbmlProcessor.ELEMENT_TYPE_MASTER;
case ID_EBML_READ_VERSION:
case ID_DOC_TYPE_READ_VERSION:
case ID_SEEK_POSITION:
case ID_TIMECODE_SCALE:
case ID_TIME_CODE:
case ID_BLOCK_DURATION:
case ID_PIXEL_WIDTH:
case ID_PIXEL_HEIGHT:
case ID_DISPLAY_WIDTH:
case ID_DISPLAY_HEIGHT:
case ID_DISPLAY_UNIT:
case ID_TRACK_NUMBER:
case ID_TRACK_TYPE:
case ID_FLAG_DEFAULT:
case ID_FLAG_FORCED:
case ID_DEFAULT_DURATION:
case ID_MAX_BLOCK_ADDITION_ID:
case ID_BLOCK_ADD_ID_TYPE:
case ID_CODEC_DELAY:
case ID_SEEK_PRE_ROLL:
case ID_CHANNELS:
case ID_AUDIO_BIT_DEPTH:
case ID_CONTENT_ENCODING_ORDER:
case ID_CONTENT_ENCODING_SCOPE:
case ID_CONTENT_COMPRESSION_ALGORITHM:
case ID_CONTENT_ENCRYPTION_ALGORITHM:
case ID_CONTENT_ENCRYPTION_AES_SETTINGS_CIPHER_MODE:
case ID_CUE_TIME:
case ID_CUE_CLUSTER_POSITION:
case ID_REFERENCE_BLOCK:
case ID_STEREO_MODE:
case ID_COLOUR_RANGE:
case ID_COLOUR_TRANSFER:
case ID_COLOUR_PRIMARIES:
case ID_MAX_CLL:
case ID_MAX_FALL:
case ID_PROJECTION_TYPE:
case ID_BLOCK_ADD_ID:
return EbmlProcessor.ELEMENT_TYPE_UNSIGNED_INT;
case ID_DOC_TYPE:
case ID_NAME:
case ID_CODEC_ID:
case ID_LANGUAGE:
return EbmlProcessor.ELEMENT_TYPE_STRING;
case ID_SEEK_ID:
case ID_BLOCK_ADD_ID_EXTRA_DATA:
case ID_CONTENT_COMPRESSION_SETTINGS:
case ID_CONTENT_ENCRYPTION_KEY_ID:
case ID_SIMPLE_BLOCK:
case ID_BLOCK:
case ID_CODEC_PRIVATE:
case ID_PROJECTION_PRIVATE:
case ID_BLOCK_ADDITIONAL:
return EbmlProcessor.ELEMENT_TYPE_BINARY;
case ID_DURATION:
case ID_SAMPLING_FREQUENCY:
case ID_PRIMARY_R_CHROMATICITY_X:
case ID_PRIMARY_R_CHROMATICITY_Y:
case ID_PRIMARY_G_CHROMATICITY_X:
case ID_PRIMARY_G_CHROMATICITY_Y:
case ID_PRIMARY_B_CHROMATICITY_X:
case ID_PRIMARY_B_CHROMATICITY_Y:
case ID_WHITE_POINT_CHROMATICITY_X:
case ID_WHITE_POINT_CHROMATICITY_Y:
case ID_LUMNINANCE_MAX:
case ID_LUMNINANCE_MIN:
case ID_PROJECTION_POSE_YAW:
case ID_PROJECTION_POSE_PITCH:
case ID_PROJECTION_POSE_ROLL:
return EbmlProcessor.ELEMENT_TYPE_FLOAT;
default:
return EbmlProcessor.ELEMENT_TYPE_UNKNOWN;
}
}
/**
* Checks if the given id is that of a level 1 element.
*
* @see EbmlProcessor#isLevel1Element(int)
*/
@CallSuper
protected boolean isLevel1Element(int id) {
return id == ID_SEGMENT_INFO || id == ID_CLUSTER || id == ID_CUES || id == ID_TRACKS;
}
/**
* Called when the start of a master element is encountered.
*
* @see EbmlProcessor#startMasterElement(int, long, long)
*/
@CallSuper
protected void startMasterElement(int id, long contentPosition, long contentSize)
throws ParserException {
assertInitialized();
switch (id) {
case ID_SEGMENT:
if (segmentContentPosition != C.POSITION_UNSET
&& segmentContentPosition != contentPosition) {
throw ParserException.createForMalformedContainer(
"Multiple Segment elements not supported", /* cause= */ null);
}
segmentContentPosition = contentPosition;
segmentContentSize = contentSize;
break;
case ID_SEEK:
seekEntryId = UNSET_ENTRY_ID;
seekEntryPosition = C.POSITION_UNSET;
break;
case ID_CUES:
cueTimesUs = new LongArray();
cueClusterPositions = new LongArray();
break;
case ID_CUE_POINT:
seenClusterPositionForCurrentCuePoint = false;
break;
case ID_CLUSTER:
if (!sentSeekMap) {
// We need to build cues before parsing the cluster.
if (seekForCuesEnabled && cuesContentPosition != C.POSITION_UNSET) {
// We know where the Cues element is located. Seek to request it.
seekForCues = true;
} else {
// We don't know where the Cues element is located. It's most likely omitted. Allow
// playback, but disable seeking.
extractorOutput.seekMap(new SeekMap.Unseekable(durationUs));
sentSeekMap = true;
}
}
break;
case ID_BLOCK_GROUP:
blockHasReferenceBlock = false;
break;
case ID_CONTENT_ENCODING:
// TODO: check and fail if more than one content encoding is present.
break;
case ID_CONTENT_ENCRYPTION:
getCurrentTrack(id).hasContentEncryption = true;
break;
case ID_TRACK_ENTRY:
currentTrack = new Track();
break;
case ID_MASTERING_METADATA:
getCurrentTrack(id).hasColorInfo = true;
break;
default:
break;
}
}
/**
* Called when the end of a master element is encountered.
*
* @see EbmlProcessor#endMasterElement(int)
*/
@CallSuper
protected void endMasterElement(int id) throws ParserException {
assertInitialized();
switch (id) {
case ID_SEGMENT_INFO:
if (timecodeScale == C.TIME_UNSET) {
// timecodeScale was omitted. Use the default value.
timecodeScale = 1000000;
}
if (durationTimecode != C.TIME_UNSET) {
durationUs = scaleTimecodeToUs(durationTimecode);
}
break;
case ID_SEEK:
if (seekEntryId == UNSET_ENTRY_ID || seekEntryPosition == C.POSITION_UNSET) {
throw ParserException.createForMalformedContainer(
"Mandatory element SeekID or SeekPosition not found", /* cause= */ null);
}
if (seekEntryId == ID_CUES) {
cuesContentPosition = seekEntryPosition;
}
break;
case ID_CUES:
if (!sentSeekMap) {
extractorOutput.seekMap(buildSeekMap(cueTimesUs, cueClusterPositions));
sentSeekMap = true;
} else {
// We have already built the cues. Ignore.
}
this.cueTimesUs = null;
this.cueClusterPositions = null;
break;
case ID_BLOCK_GROUP:
if (blockState != BLOCK_STATE_DATA) {
// We've skipped this block (due to incompatible track number).
return;
}
// Commit sample metadata.
int sampleOffset = 0;
for (int i = 0; i < blockSampleCount; i++) {
sampleOffset += blockSampleSizes[i];
}
Track track = tracks.get(blockTrackNumber);
track.assertOutputInitialized();
for (int i = 0; i < blockSampleCount; i++) {
long sampleTimeUs = blockTimeUs + (i * track.defaultSampleDurationNs) / 1000;
int sampleFlags = blockFlags;
if (i == 0 && !blockHasReferenceBlock) {
// If the ReferenceBlock element was not found in this block, then the first frame is a
// keyframe.
sampleFlags |= C.BUFFER_FLAG_KEY_FRAME;
}
int sampleSize = blockSampleSizes[i];
sampleOffset -= sampleSize; // The offset is to the end of the sample.
commitSampleToOutput(track, sampleTimeUs, sampleFlags, sampleSize, sampleOffset);
}
blockState = BLOCK_STATE_START;
break;
case ID_CONTENT_ENCODING:
assertInTrackEntry(id);
if (currentTrack.hasContentEncryption) {
if (currentTrack.cryptoData == null) {
throw ParserException.createForMalformedContainer(
"Encrypted Track found but ContentEncKeyID was not found", /* cause= */ null);
}
currentTrack.drmInitData =
new DrmInitData(
new SchemeData(
C.UUID_NIL, MimeTypes.VIDEO_WEBM, currentTrack.cryptoData.encryptionKey));
}
break;
case ID_CONTENT_ENCODINGS:
assertInTrackEntry(id);
if (currentTrack.hasContentEncryption && currentTrack.sampleStrippedBytes != null) {
throw ParserException.createForMalformedContainer(
"Combining encryption and compression is not supported", /* cause= */ null);
}
break;
case ID_TRACK_ENTRY:
Track currentTrack = checkStateNotNull(this.currentTrack);
if (currentTrack.codecId == null) {
throw ParserException.createForMalformedContainer(
"CodecId is missing in TrackEntry element", /* cause= */ null);
} else {
if (isCodecSupported(currentTrack.codecId)) {
currentTrack.initializeOutput(extractorOutput, currentTrack.number);
tracks.put(currentTrack.number, currentTrack);
}
}
this.currentTrack = null;
break;
case ID_TRACKS:
if (tracks.size() == 0) {
throw ParserException.createForMalformedContainer(
"No valid tracks were found", /* cause= */ null);
}
extractorOutput.endTracks();
break;
default:
break;
}
}
/**
* Called when an integer element is encountered.
*
* @see EbmlProcessor#integerElement(int, long)
*/
@CallSuper
protected void integerElement(int id, long value) throws ParserException {
switch (id) {
case ID_EBML_READ_VERSION:
// Validate that EBMLReadVersion is supported. This extractor only supports v1.
if (value != 1) {
throw ParserException.createForMalformedContainer(
"EBMLReadVersion " + value + " not supported", /* cause= */ null);
}
break;
case ID_DOC_TYPE_READ_VERSION:
// Validate that DocTypeReadVersion is supported. This extractor only supports up to v2.
if (value < 1 || value > 2) {
throw ParserException.createForMalformedContainer(
"DocTypeReadVersion " + value + " not supported", /* cause= */ null);
}
break;
case ID_SEEK_POSITION:
// Seek Position is the relative offset beginning from the Segment. So to get absolute
// offset from the beginning of the file, we need to add segmentContentPosition to it.
seekEntryPosition = value + segmentContentPosition;
break;
case ID_TIMECODE_SCALE:
timecodeScale = value;
break;
case ID_PIXEL_WIDTH:
getCurrentTrack(id).width = (int) value;
break;
case ID_PIXEL_HEIGHT:
getCurrentTrack(id).height = (int) value;
break;
case ID_DISPLAY_WIDTH:
getCurrentTrack(id).displayWidth = (int) value;
break;
case ID_DISPLAY_HEIGHT:
getCurrentTrack(id).displayHeight = (int) value;
break;
case ID_DISPLAY_UNIT:
getCurrentTrack(id).displayUnit = (int) value;
break;
case ID_TRACK_NUMBER:
getCurrentTrack(id).number = (int) value;
break;
case ID_FLAG_DEFAULT:
getCurrentTrack(id).flagDefault = value == 1;
break;
case ID_FLAG_FORCED:
getCurrentTrack(id).flagForced = value == 1;
break;
case ID_TRACK_TYPE:
getCurrentTrack(id).type = (int) value;
break;
case ID_DEFAULT_DURATION:
getCurrentTrack(id).defaultSampleDurationNs = (int) value;
break;
case ID_MAX_BLOCK_ADDITION_ID:
getCurrentTrack(id).maxBlockAdditionId = (int) value;
break;
case ID_BLOCK_ADD_ID_TYPE:
getCurrentTrack(id).blockAddIdType = (int) value;
break;
case ID_CODEC_DELAY:
getCurrentTrack(id).codecDelayNs = value;
break;
case ID_SEEK_PRE_ROLL:
getCurrentTrack(id).seekPreRollNs = value;
break;
case ID_CHANNELS:
getCurrentTrack(id).channelCount = (int) value;
break;
case ID_AUDIO_BIT_DEPTH:
getCurrentTrack(id).audioBitDepth = (int) value;
break;
case ID_REFERENCE_BLOCK:
blockHasReferenceBlock = true;
break;
case ID_CONTENT_ENCODING_ORDER:
// This extractor only supports one ContentEncoding element and hence the order has to be 0.
if (value != 0) {
throw ParserException.createForMalformedContainer(
"ContentEncodingOrder " + value + " not supported", /* cause= */ null);
}
break;
case ID_CONTENT_ENCODING_SCOPE:
// This extractor only supports the scope of all frames.
if (value != 1) {
throw ParserException.createForMalformedContainer(
"ContentEncodingScope " + value + " not supported", /* cause= */ null);
}
break;
case ID_CONTENT_COMPRESSION_ALGORITHM:
// This extractor only supports header stripping.
if (value != 3) {
throw ParserException.createForMalformedContainer(
"ContentCompAlgo " + value + " not supported", /* cause= */ null);
}
break;
case ID_CONTENT_ENCRYPTION_ALGORITHM:
// Only the value 5 (AES) is allowed according to the WebM specification.
if (value != 5) {
throw ParserException.createForMalformedContainer(
"ContentEncAlgo " + value + " not supported", /* cause= */ null);
}
break;
case ID_CONTENT_ENCRYPTION_AES_SETTINGS_CIPHER_MODE:
// Only the value 1 is allowed according to the WebM specification.
if (value != 1) {
throw ParserException.createForMalformedContainer(
"AESSettingsCipherMode " + value + " not supported", /* cause= */ null);
}
break;
case ID_CUE_TIME:
assertInCues(id);
cueTimesUs.add(scaleTimecodeToUs(value));
break;
case ID_CUE_CLUSTER_POSITION:
if (!seenClusterPositionForCurrentCuePoint) {
assertInCues(id);
// If there's more than one video/audio track, then there could be more than one
// CueTrackPositions within a single CuePoint. In such a case, ignore all but the first
// one (since the cluster position will be quite close for all the tracks).
cueClusterPositions.add(value);
seenClusterPositionForCurrentCuePoint = true;
}
break;
case ID_TIME_CODE:
clusterTimecodeUs = scaleTimecodeToUs(value);
break;
case ID_BLOCK_DURATION:
blockDurationUs = scaleTimecodeToUs(value);
break;
case ID_STEREO_MODE:
int layout = (int) value;
assertInTrackEntry(id);
switch (layout) {
case 0:
currentTrack.stereoMode = C.STEREO_MODE_MONO;
break;
case 1:
currentTrack.stereoMode = C.STEREO_MODE_LEFT_RIGHT;
break;
case 3:
currentTrack.stereoMode = C.STEREO_MODE_TOP_BOTTOM;
break;
case 15:
currentTrack.stereoMode = C.STEREO_MODE_STEREO_MESH;
break;
default:
break;
}
break;
case ID_COLOUR_PRIMARIES:
assertInTrackEntry(id);
currentTrack.hasColorInfo = true;
int colorSpace = ColorInfo.isoColorPrimariesToColorSpace((int) value);
if (colorSpace != Format.NO_VALUE) {
currentTrack.colorSpace = colorSpace;
}
break;
case ID_COLOUR_TRANSFER:
assertInTrackEntry(id);
int colorTransfer = ColorInfo.isoTransferCharacteristicsToColorTransfer((int) value);
if (colorTransfer != Format.NO_VALUE) {
currentTrack.colorTransfer = colorTransfer;
}
break;
case ID_COLOUR_RANGE:
assertInTrackEntry(id);
switch ((int) value) {
case 1: // Broadcast range.
currentTrack.colorRange = C.COLOR_RANGE_LIMITED;
break;
case 2:
currentTrack.colorRange = C.COLOR_RANGE_FULL;
break;
default:
break;
}
break;
case ID_MAX_CLL:
getCurrentTrack(id).maxContentLuminance = (int) value;
break;
case ID_MAX_FALL:
getCurrentTrack(id).maxFrameAverageLuminance = (int) value;
break;
case ID_PROJECTION_TYPE:
assertInTrackEntry(id);
switch ((int) value) {
case 0:
currentTrack.projectionType = C.PROJECTION_RECTANGULAR;
break;
case 1:
currentTrack.projectionType = C.PROJECTION_EQUIRECTANGULAR;
break;
case 2:
currentTrack.projectionType = C.PROJECTION_CUBEMAP;
break;
case 3:
currentTrack.projectionType = C.PROJECTION_MESH;
break;
default:
break;
}
break;
case ID_BLOCK_ADD_ID:
blockAdditionalId = (int) value;
break;
default:
break;
}
}
/**
* Called when a float element is encountered.
*
* @see EbmlProcessor#floatElement(int, double)
*/
@CallSuper
protected void floatElement(int id, double value) throws ParserException {
switch (id) {
case ID_DURATION:
durationTimecode = (long) value;
break;
case ID_SAMPLING_FREQUENCY:
getCurrentTrack(id).sampleRate = (int) value;
break;
case ID_PRIMARY_R_CHROMATICITY_X:
getCurrentTrack(id).primaryRChromaticityX = (float) value;
break;
case ID_PRIMARY_R_CHROMATICITY_Y:
getCurrentTrack(id).primaryRChromaticityY = (float) value;
break;
case ID_PRIMARY_G_CHROMATICITY_X:
getCurrentTrack(id).primaryGChromaticityX = (float) value;
break;
case ID_PRIMARY_G_CHROMATICITY_Y:
getCurrentTrack(id).primaryGChromaticityY = (float) value;
break;
case ID_PRIMARY_B_CHROMATICITY_X:
getCurrentTrack(id).primaryBChromaticityX = (float) value;
break;
case ID_PRIMARY_B_CHROMATICITY_Y:
getCurrentTrack(id).primaryBChromaticityY = (float) value;
break;
case ID_WHITE_POINT_CHROMATICITY_X:
getCurrentTrack(id).whitePointChromaticityX = (float) value;
break;
case ID_WHITE_POINT_CHROMATICITY_Y:
getCurrentTrack(id).whitePointChromaticityY = (float) value;
break;
case ID_LUMNINANCE_MAX:
getCurrentTrack(id).maxMasteringLuminance = (float) value;
break;
case ID_LUMNINANCE_MIN:
getCurrentTrack(id).minMasteringLuminance = (float) value;
break;
case ID_PROJECTION_POSE_YAW:
getCurrentTrack(id).projectionPoseYaw = (float) value;
break;
case ID_PROJECTION_POSE_PITCH:
getCurrentTrack(id).projectionPosePitch = (float) value;
break;
case ID_PROJECTION_POSE_ROLL:
getCurrentTrack(id).projectionPoseRoll = (float) value;
break;
default:
break;
}
}
/**
* Called when a string element is encountered.
*
* @see EbmlProcessor#stringElement(int, String)
*/
@CallSuper
protected void stringElement(int id, String value) throws ParserException {
switch (id) {
case ID_DOC_TYPE:
// Validate that DocType is supported.
if (!DOC_TYPE_WEBM.equals(value) && !DOC_TYPE_MATROSKA.equals(value)) {
throw ParserException.createForMalformedContainer(
"DocType " + value + " not supported", /* cause= */ null);
}
break;
case ID_NAME:
getCurrentTrack(id).name = value;
break;
case ID_CODEC_ID:
getCurrentTrack(id).codecId = value;
break;
case ID_LANGUAGE:
getCurrentTrack(id).language = value;
break;
default:
break;
}
}
/**
* Called when a binary element is encountered.
*
* @see EbmlProcessor#binaryElement(int, int, ExtractorInput)
*/
@CallSuper
protected void binaryElement(int id, int contentSize, ExtractorInput input) throws IOException {
switch (id) {
case ID_SEEK_ID:
Arrays.fill(seekEntryIdBytes.getData(), (byte) 0);
input.readFully(seekEntryIdBytes.getData(), 4 - contentSize, contentSize);
seekEntryIdBytes.setPosition(0);
seekEntryId = (int) seekEntryIdBytes.readUnsignedInt();
break;
case ID_BLOCK_ADD_ID_EXTRA_DATA:
handleBlockAddIDExtraData(getCurrentTrack(id), input, contentSize);
break;
case ID_CODEC_PRIVATE:
assertInTrackEntry(id);
currentTrack.codecPrivate = new byte[contentSize];
input.readFully(currentTrack.codecPrivate, 0, contentSize);
break;
case ID_PROJECTION_PRIVATE:
assertInTrackEntry(id);
currentTrack.projectionData = new byte[contentSize];
input.readFully(currentTrack.projectionData, 0, contentSize);
break;
case ID_CONTENT_COMPRESSION_SETTINGS:
assertInTrackEntry(id);
// This extractor only supports header stripping, so the payload is the stripped bytes.
currentTrack.sampleStrippedBytes = new byte[contentSize];
input.readFully(currentTrack.sampleStrippedBytes, 0, contentSize);
break;
case ID_CONTENT_ENCRYPTION_KEY_ID:
byte[] encryptionKey = new byte[contentSize];
input.readFully(encryptionKey, 0, contentSize);
getCurrentTrack(id).cryptoData =
new TrackOutput.CryptoData(
C.CRYPTO_MODE_AES_CTR, encryptionKey, 0, 0); // We assume patternless AES-CTR.
break;
case ID_SIMPLE_BLOCK:
case ID_BLOCK:
// Please refer to http://www.matroska.org/technical/specs/index.html#simpleblock_structure
// and http://matroska.org/technical/specs/index.html#block_structure
// for info about how data is organized in SimpleBlock and Block elements respectively. They
// differ only in the way flags are specified.
if (blockState == BLOCK_STATE_START) {
blockTrackNumber = (int) varintReader.readUnsignedVarint(input, false, true, 8);
blockTrackNumberLength = varintReader.getLastLength();
blockDurationUs = C.TIME_UNSET;
blockState = BLOCK_STATE_HEADER;
scratch.reset(/* limit= */ 0);
}
Track track = tracks.get(blockTrackNumber);
// Ignore the block if we don't know about the track to which it belongs.
if (track == null) {
input.skipFully(contentSize - blockTrackNumberLength);
blockState = BLOCK_STATE_START;
return;
}
track.assertOutputInitialized();
if (blockState == BLOCK_STATE_HEADER) {
// Read the relative timecode (2 bytes) and flags (1 byte).
readScratch(input, 3);
int lacing = (scratch.getData()[2] & 0x06) >> 1;
if (lacing == LACING_NONE) {
blockSampleCount = 1;
blockSampleSizes = ensureArrayCapacity(blockSampleSizes, 1);
blockSampleSizes[0] = contentSize - blockTrackNumberLength - 3;
} else {
// Read the sample count (1 byte).
readScratch(input, 4);
blockSampleCount = (scratch.getData()[3] & 0xFF) + 1;
blockSampleSizes = ensureArrayCapacity(blockSampleSizes, blockSampleCount);
if (lacing == LACING_FIXED_SIZE) {
int blockLacingSampleSize =
(contentSize - blockTrackNumberLength - 4) / blockSampleCount;
Arrays.fill(blockSampleSizes, 0, blockSampleCount, blockLacingSampleSize);
} else if (lacing == LACING_XIPH) {
int totalSamplesSize = 0;
int headerSize = 4;
for (int sampleIndex = 0; sampleIndex < blockSampleCount - 1; sampleIndex++) {
blockSampleSizes[sampleIndex] = 0;
int byteValue;
do {
readScratch(input, ++headerSize);
byteValue = scratch.getData()[headerSize - 1] & 0xFF;
blockSampleSizes[sampleIndex] += byteValue;
} while (byteValue == 0xFF);
totalSamplesSize += blockSampleSizes[sampleIndex];
}
blockSampleSizes[blockSampleCount - 1] =
contentSize - blockTrackNumberLength - headerSize - totalSamplesSize;
} else if (lacing == LACING_EBML) {
int totalSamplesSize = 0;
int headerSize = 4;
for (int sampleIndex = 0; sampleIndex < blockSampleCount - 1; sampleIndex++) {
blockSampleSizes[sampleIndex] = 0;
readScratch(input, ++headerSize);
if (scratch.getData()[headerSize - 1] == 0) {
throw ParserException.createForMalformedContainer(
"No valid varint length mask found", /* cause= */ null);
}
long readValue = 0;
for (int i = 0; i < 8; i++) {
int lengthMask = 1 << (7 - i);
if ((scratch.getData()[headerSize - 1] & lengthMask) != 0) {
int readPosition = headerSize - 1;
headerSize += i;
readScratch(input, headerSize);
readValue = (scratch.getData()[readPosition++] & 0xFF) & ~lengthMask;
while (readPosition < headerSize) {
readValue <<= 8;
readValue |= (scratch.getData()[readPosition++] & 0xFF);
}
// The first read value is the first size. Later values are signed offsets.
if (sampleIndex > 0) {
readValue -= (1L << (6 + i * 7)) - 1;
}
break;
}
}
if (readValue < Integer.MIN_VALUE || readValue > Integer.MAX_VALUE) {
throw ParserException.createForMalformedContainer(
"EBML lacing sample size out of range.", /* cause= */ null);
}
int intReadValue = (int) readValue;
blockSampleSizes[sampleIndex] =
sampleIndex == 0
? intReadValue
: blockSampleSizes[sampleIndex - 1] + intReadValue;
totalSamplesSize += blockSampleSizes[sampleIndex];
}
blockSampleSizes[blockSampleCount - 1] =
contentSize - blockTrackNumberLength - headerSize - totalSamplesSize;
} else {
// Lacing is always in the range 0--3.
throw ParserException.createForMalformedContainer(
"Unexpected lacing value: " + lacing, /* cause= */ null);
}
}
int timecode = (scratch.getData()[0] << 8) | (scratch.getData()[1] & 0xFF);
blockTimeUs = clusterTimecodeUs + scaleTimecodeToUs(timecode);
boolean isKeyframe =
track.type == TRACK_TYPE_AUDIO
|| (id == ID_SIMPLE_BLOCK && (scratch.getData()[2] & 0x80) == 0x80);
blockFlags = isKeyframe ? C.BUFFER_FLAG_KEY_FRAME : 0;
blockState = BLOCK_STATE_DATA;
blockSampleIndex = 0;
}
if (id == ID_SIMPLE_BLOCK) {
// For SimpleBlock, we can write sample data and immediately commit the corresponding
// sample metadata.
while (blockSampleIndex < blockSampleCount) {
int sampleSize = writeSampleData(input, track, blockSampleSizes[blockSampleIndex]);
long sampleTimeUs =
blockTimeUs + (blockSampleIndex * track.defaultSampleDurationNs) / 1000;
commitSampleToOutput(track, sampleTimeUs, blockFlags, sampleSize, /* offset= */ 0);
blockSampleIndex++;
}
blockState = BLOCK_STATE_START;
} else {
// For Block, we need to wait until the end of the BlockGroup element before committing
// sample metadata. This is so that we can handle ReferenceBlock (which can be used to
// infer whether the first sample in the block is a keyframe), and BlockAdditions (which
// can contain additional sample data to append) contained in the block group. Just output
// the sample data, storing the final sample sizes for when we commit the metadata.
while (blockSampleIndex < blockSampleCount) {
blockSampleSizes[blockSampleIndex] =
writeSampleData(input, track, blockSampleSizes[blockSampleIndex]);
blockSampleIndex++;
}
}
break;
case ID_BLOCK_ADDITIONAL:
if (blockState != BLOCK_STATE_DATA) {
return;
}
handleBlockAdditionalData(
tracks.get(blockTrackNumber), blockAdditionalId, input, contentSize);
break;
default:
throw ParserException.createForMalformedContainer(
"Unexpected id: " + id, /* cause= */ null);
}
}
protected void handleBlockAddIDExtraData(Track track, ExtractorInput input, int contentSize)
throws IOException {
if (track.blockAddIdType == BLOCK_ADD_ID_TYPE_DVVC
|| track.blockAddIdType == BLOCK_ADD_ID_TYPE_DVCC) {
track.dolbyVisionConfigBytes = new byte[contentSize];
input.readFully(track.dolbyVisionConfigBytes, 0, contentSize);
} else {
// Unhandled BlockAddIDExtraData.
input.skipFully(contentSize);
}
}
protected void handleBlockAdditionalData(
Track track, int blockAdditionalId, ExtractorInput input, int contentSize)
throws IOException {
if (blockAdditionalId == BLOCK_ADDITIONAL_ID_VP9_ITU_T_35
&& CODEC_ID_VP9.equals(track.codecId)) {
blockAdditionalData.reset(contentSize);
input.readFully(blockAdditionalData.getData(), 0, contentSize);
} else {
// Unhandled block additional data.
input.skipFully(contentSize);
}
}
@EnsuresNonNull("currentTrack")
private void assertInTrackEntry(int id) throws ParserException {
if (currentTrack == null) {
throw ParserException.createForMalformedContainer(
"Element " + id + " must be in a TrackEntry", /* cause= */ null);
}
}
@EnsuresNonNull({"cueTimesUs", "cueClusterPositions"})
private void assertInCues(int id) throws ParserException {
if (cueTimesUs == null || cueClusterPositions == null) {
throw ParserException.createForMalformedContainer(
"Element " + id + " must be in a Cues", /* cause= */ null);
}
}
/**
* Returns the track corresponding to the current TrackEntry element.
*
* @throws ParserException if the element id is not in a TrackEntry.
*/
protected Track getCurrentTrack(int currentElementId) throws ParserException {
assertInTrackEntry(currentElementId);
return currentTrack;
}
@RequiresNonNull("#1.output")
private void commitSampleToOutput(
Track track, long timeUs, @C.BufferFlags int flags, int size, int offset) {
if (track.trueHdSampleRechunker != null) {
track.trueHdSampleRechunker.sampleMetadata(
track.output, timeUs, flags, size, offset, track.cryptoData);
} else {
if (CODEC_ID_SUBRIP.equals(track.codecId) || CODEC_ID_ASS.equals(track.codecId)) {
if (blockSampleCount > 1) {
Log.w(TAG, "Skipping subtitle sample in laced block.");
} else if (blockDurationUs == C.TIME_UNSET) {
Log.w(TAG, "Skipping subtitle sample with no duration.");
} else {
setSubtitleEndTime(track.codecId, blockDurationUs, subtitleSample.getData());
// The Matroska spec doesn't clearly define whether subtitle samples are null-terminated
// or the sample should instead be sized precisely. We truncate the sample at a null-byte
// to gracefully handle null-terminated strings followed by garbage bytes.
for (int i = subtitleSample.getPosition(); i < subtitleSample.limit(); i++) {
if (subtitleSample.getData()[i] == 0) {
subtitleSample.setLimit(i);
break;
}
}
// Note: If we ever want to support DRM protected subtitles then we'll need to output the
// appropriate encryption data here.
track.output.sampleData(subtitleSample, subtitleSample.limit());
size += subtitleSample.limit();
}
}
if ((flags & C.BUFFER_FLAG_HAS_SUPPLEMENTAL_DATA) != 0) {
if (blockSampleCount > 1) {
// There were multiple samples in the block. Appending the additional data to the last
// sample doesn't make sense. Skip instead.
flags &= ~C.BUFFER_FLAG_HAS_SUPPLEMENTAL_DATA;
} else {
// Append supplemental data.
int blockAdditionalSize = blockAdditionalData.limit();
track.output.sampleData(
blockAdditionalData, blockAdditionalSize, TrackOutput.SAMPLE_DATA_PART_SUPPLEMENTAL);
size += blockAdditionalSize;
}
}
track.output.sampleMetadata(timeUs, flags, size, offset, track.cryptoData);
}
haveOutputSample = true;
}
/**
* Ensures {@link #scratch} contains at least {@code requiredLength} bytes of data, reading from
* the extractor input if necessary.
*/
private void readScratch(ExtractorInput input, int requiredLength) throws IOException {
if (scratch.limit() >= requiredLength) {
return;
}
if (scratch.capacity() < requiredLength) {
scratch.ensureCapacity(max(scratch.capacity() * 2, requiredLength));
}
input.readFully(scratch.getData(), scratch.limit(), requiredLength - scratch.limit());
scratch.setLimit(requiredLength);
}
/**
* 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();
}
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;
// NAL units are length delimited, but the decoder requires start code delimited units.
// Loop until we've written the sample to the track output, replacing length delimiters with
// 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();
}
/**
* Called by {@link #writeSampleData(ExtractorInput, Track, int)} when the sample has been
* written. Returns the final sample size and resets state for the next sample.
*/
private int finishWriteSampleData() {
int sampleSize = sampleBytesWritten;
resetWriteSampleData();
return sampleSize;
}
/** Resets state used by {@link #writeSampleData(ExtractorInput, Track, int)}. */
private void resetWriteSampleData() {
sampleBytesRead = 0;
sampleBytesWritten = 0;
sampleCurrentNalBytesRemaining = 0;
sampleEncodingHandled = false;
sampleSignalByteRead = false;
samplePartitionCountRead = false;
samplePartitionCount = 0;
sampleSignalByte = (byte) 0;
sampleInitializationVectorRead = false;
sampleStrippedBytes.reset(/* limit= */ 0);
}
private void writeSubtitleSampleData(ExtractorInput input, byte[] samplePrefix, int size)
throws IOException {
int sizeWithPrefix = samplePrefix.length + size;
if (subtitleSample.capacity() < sizeWithPrefix) {
// Initialize subripSample to contain the required prefix and have space to hold a subtitle
// twice as long as this one.
subtitleSample.reset(Arrays.copyOf(samplePrefix, sizeWithPrefix + size));
} else {
System.arraycopy(samplePrefix, 0, subtitleSample.getData(), 0, samplePrefix.length);
}
input.readFully(subtitleSample.getData(), samplePrefix.length, size);
subtitleSample.setPosition(0);
subtitleSample.setLimit(sizeWithPrefix);
// Defer writing the data to the track output. We need to modify the sample data by setting
// the correct end timecode, which we might not have yet.
}
/**
* Overwrites the end timecode in {@code subtitleData} with the correctly formatted time derived
* from {@code durationUs}.
*
* <p>See documentation on {@link #SSA_DIALOGUE_FORMAT} and {@link #SUBRIP_PREFIX} for why we use
* the duration as the end timecode.
*
* @param codecId The subtitle codec; must be {@link #CODEC_ID_SUBRIP} or {@link #CODEC_ID_ASS}.
* @param durationUs The duration of the sample, in microseconds.
* @param subtitleData The subtitle sample in which to overwrite the end timecode (output
* parameter).
*/
private static void setSubtitleEndTime(String codecId, long durationUs, byte[] subtitleData) {
byte[] endTimecode;
int endTimecodeOffset;
switch (codecId) {
case CODEC_ID_SUBRIP:
endTimecode =
formatSubtitleTimecode(
durationUs, SUBRIP_TIMECODE_FORMAT, SUBRIP_TIMECODE_LAST_VALUE_SCALING_FACTOR);
endTimecodeOffset = SUBRIP_PREFIX_END_TIMECODE_OFFSET;
break;
case CODEC_ID_ASS:
endTimecode =
formatSubtitleTimecode(
durationUs, SSA_TIMECODE_FORMAT, SSA_TIMECODE_LAST_VALUE_SCALING_FACTOR);
endTimecodeOffset = SSA_PREFIX_END_TIMECODE_OFFSET;
break;
default:
throw new IllegalArgumentException();
}
System.arraycopy(endTimecode, 0, subtitleData, endTimecodeOffset, endTimecode.length);
}
/**
* Formats {@code timeUs} using {@code timecodeFormat}, and sets it as the end timecode in {@code
* subtitleSampleData}.
*/
private static byte[] formatSubtitleTimecode(
long timeUs, String timecodeFormat, long lastTimecodeValueScalingFactor) {
checkArgument(timeUs != C.TIME_UNSET);
byte[] timeCodeData;
int hours = (int) (timeUs / (3600 * C.MICROS_PER_SECOND));
timeUs -= (hours * 3600 * C.MICROS_PER_SECOND);
int minutes = (int) (timeUs / (60 * C.MICROS_PER_SECOND));
timeUs -= (minutes * 60 * C.MICROS_PER_SECOND);
int seconds = (int) (timeUs / C.MICROS_PER_SECOND);
timeUs -= (seconds * C.MICROS_PER_SECOND);
int lastValue = (int) (timeUs / lastTimecodeValueScalingFactor);
timeCodeData =
Util.getUtf8Bytes(
String.format(Locale.US, timecodeFormat, hours, minutes, seconds, lastValue));
return timeCodeData;
}
/**
* Writes {@code length} bytes of sample data into {@code target} at {@code offset}, consisting of
* pending {@link #sampleStrippedBytes} and any remaining data read from {@code input}.
*/
private void writeToTarget(ExtractorInput input, byte[] target, int offset, int length)
throws IOException {
int pendingStrippedBytes = min(length, sampleStrippedBytes.bytesLeft());
input.readFully(target, offset + pendingStrippedBytes, length - pendingStrippedBytes);
if (pendingStrippedBytes > 0) {
sampleStrippedBytes.readBytes(target, offset, pendingStrippedBytes);
}
}
/**
* Outputs up to {@code length} bytes of sample data to {@code output}, consisting of either
* {@link #sampleStrippedBytes} or data read from {@code input}.
*/
private int writeToOutput(ExtractorInput input, TrackOutput output, int length)
throws IOException {
int bytesWritten;
int strippedBytesLeft = sampleStrippedBytes.bytesLeft();
if (strippedBytesLeft > 0) {
bytesWritten = min(length, strippedBytesLeft);
output.sampleData(sampleStrippedBytes, bytesWritten);
} else {
bytesWritten = output.sampleData(input, length, false);
}
return bytesWritten;
}
/**
* Builds a {@link SeekMap} from the recently gathered Cues information.
*
* @return The built {@link SeekMap}. The returned {@link SeekMap} may be unseekable if cues
* information was missing or incomplete.
*/
private SeekMap buildSeekMap(
@Nullable LongArray cueTimesUs, @Nullable LongArray cueClusterPositions) {
if (segmentContentPosition == C.POSITION_UNSET
|| durationUs == C.TIME_UNSET
|| cueTimesUs == null
|| cueTimesUs.size() == 0
|| cueClusterPositions == null
|| cueClusterPositions.size() != cueTimesUs.size()) {
// Cues information is missing or incomplete.
return new SeekMap.Unseekable(durationUs);
}
int cuePointsSize = cueTimesUs.size();
int[] sizes = new int[cuePointsSize];
long[] offsets = new long[cuePointsSize];
long[] durationsUs = new long[cuePointsSize];
long[] timesUs = new long[cuePointsSize];
for (int i = 0; i < cuePointsSize; i++) {
timesUs[i] = cueTimesUs.get(i);
offsets[i] = segmentContentPosition + cueClusterPositions.get(i);
}
for (int i = 0; i < cuePointsSize - 1; i++) {
sizes[i] = (int) (offsets[i + 1] - offsets[i]);
durationsUs[i] = timesUs[i + 1] - timesUs[i];
}
sizes[cuePointsSize - 1] =
(int) (segmentContentPosition + segmentContentSize - offsets[cuePointsSize - 1]);
durationsUs[cuePointsSize - 1] = durationUs - timesUs[cuePointsSize - 1];
long lastDurationUs = durationsUs[cuePointsSize - 1];
if (lastDurationUs <= 0) {
Log.w(TAG, "Discarding last cue point with unexpected duration: " + lastDurationUs);
sizes = Arrays.copyOf(sizes, sizes.length - 1);
offsets = Arrays.copyOf(offsets, offsets.length - 1);
durationsUs = Arrays.copyOf(durationsUs, durationsUs.length - 1);
timesUs = Arrays.copyOf(timesUs, timesUs.length - 1);
}
return new ChunkIndex(sizes, offsets, durationsUs, timesUs);
}
/**
* Updates the position of the holder to Cues element's position if the extractor configuration
* permits use of master seek entry. After building Cues sets the holder's position back to where
* it was before.
*
* @param seekPosition The holder whose position will be updated.
* @param currentPosition Current position of the input.
* @return Whether the seek position was updated.
*/
private boolean maybeSeekForCues(PositionHolder seekPosition, long currentPosition) {
if (seekForCues) {
seekPositionAfterBuildingCues = currentPosition;
seekPosition.position = cuesContentPosition;
seekForCues = false;
return true;
}
// After parsing Cues, seek back to original position if available. We will not do this unless
// we seeked to get to the Cues in the first place.
if (sentSeekMap && seekPositionAfterBuildingCues != C.POSITION_UNSET) {
seekPosition.position = seekPositionAfterBuildingCues;
seekPositionAfterBuildingCues = C.POSITION_UNSET;
return true;
}
return false;
}
private long scaleTimecodeToUs(long unscaledTimecode) throws ParserException {
if (timecodeScale == C.TIME_UNSET) {
throw ParserException.createForMalformedContainer(
"Can't scale timecode prior to timecodeScale being set.", /* cause= */ null);
}
return Util.scaleLargeTimestamp(unscaledTimecode, timecodeScale, 1000);
}
private static boolean isCodecSupported(String codecId) {
switch (codecId) {
case CODEC_ID_VP8:
case CODEC_ID_VP9:
case CODEC_ID_AV1:
case CODEC_ID_MPEG2:
case CODEC_ID_MPEG4_SP:
case CODEC_ID_MPEG4_ASP:
case CODEC_ID_MPEG4_AP:
case CODEC_ID_H264:
case CODEC_ID_H265:
case CODEC_ID_FOURCC:
case CODEC_ID_THEORA:
case CODEC_ID_OPUS:
case CODEC_ID_VORBIS:
case CODEC_ID_AAC:
case CODEC_ID_MP2:
case CODEC_ID_MP3:
case CODEC_ID_AC3:
case CODEC_ID_E_AC3:
case CODEC_ID_TRUEHD:
case CODEC_ID_DTS:
case CODEC_ID_DTS_EXPRESS:
case CODEC_ID_DTS_LOSSLESS:
case CODEC_ID_FLAC:
case CODEC_ID_ACM:
case CODEC_ID_PCM_INT_LIT:
case CODEC_ID_PCM_INT_BIG:
case CODEC_ID_PCM_FLOAT:
case CODEC_ID_SUBRIP:
case CODEC_ID_ASS:
case CODEC_ID_VOBSUB:
case CODEC_ID_PGS:
case CODEC_ID_DVBSUB:
return true;
default:
return false;
}
}
/**
* Returns an array that can store (at least) {@code length} elements, which will be either a new
* array or {@code array} if it's not null and large enough.
*/
private static int[] ensureArrayCapacity(@Nullable int[] array, int length) {
if (array == null) {
return new int[length];
} else if (array.length >= length) {
return array;
} else {
// Double the size to avoid allocating constantly if the required length increases gradually.
return new int[max(array.length * 2, length)];
}
}
@EnsuresNonNull("extractorOutput")
private void assertInitialized() {
checkStateNotNull(extractorOutput);
}
/** Passes events through to the outer {@link MatroskaExtractor}. */
private final class InnerEbmlProcessor implements EbmlProcessor {
@Override
@ElementType
public int getElementType(int id) {
return MatroskaExtractor.this.getElementType(id);
}
@Override
public boolean isLevel1Element(int id) {
return MatroskaExtractor.this.isLevel1Element(id);
}
@Override
public void startMasterElement(int id, long contentPosition, long contentSize)
throws ParserException {
MatroskaExtractor.this.startMasterElement(id, contentPosition, contentSize);
}
@Override
public void endMasterElement(int id) throws ParserException {
MatroskaExtractor.this.endMasterElement(id);
}
@Override
public void integerElement(int id, long value) throws ParserException {
MatroskaExtractor.this.integerElement(id, value);
}
@Override
public void floatElement(int id, double value) throws ParserException {
MatroskaExtractor.this.floatElement(id, value);
}
@Override
public void stringElement(int id, String value) throws ParserException {
MatroskaExtractor.this.stringElement(id, value);
}
@Override
public void binaryElement(int id, int contentsSize, ExtractorInput input) throws IOException {
MatroskaExtractor.this.binaryElement(id, contentsSize, input);
}
}
/** Holds data corresponding to a single track. */
protected static final class Track {
private static final int DISPLAY_UNIT_PIXELS = 0;
private static final int MAX_CHROMATICITY = 50_000; // Defined in CTA-861.3.
/** Default max content light level (CLL) that should be encoded into hdrStaticInfo. */
private static final int DEFAULT_MAX_CLL = 1000; // nits.
/** Default frame-average light level (FALL) that should be encoded into hdrStaticInfo. */
private static final int DEFAULT_MAX_FALL = 200; // nits.
// Common elements.
public @MonotonicNonNull String name;
public @MonotonicNonNull String codecId;
public int number;
public int type;
public int defaultSampleDurationNs;
public int maxBlockAdditionId;
private int blockAddIdType;
public boolean hasContentEncryption;
public byte @MonotonicNonNull [] sampleStrippedBytes;
public TrackOutput.@MonotonicNonNull CryptoData cryptoData;
public byte @MonotonicNonNull [] codecPrivate;
public @MonotonicNonNull DrmInitData drmInitData;
// Video elements.
public int width = Format.NO_VALUE;
public int height = Format.NO_VALUE;
public int displayWidth = Format.NO_VALUE;
public int displayHeight = Format.NO_VALUE;
public int displayUnit = DISPLAY_UNIT_PIXELS;
@C.Projection public int projectionType = Format.NO_VALUE;
public float projectionPoseYaw = 0f;
public float projectionPosePitch = 0f;
public float projectionPoseRoll = 0f;
public byte @MonotonicNonNull [] projectionData = null;
@C.StereoMode public int stereoMode = Format.NO_VALUE;
public boolean hasColorInfo = false;
@C.ColorSpace public int colorSpace = Format.NO_VALUE;
@C.ColorTransfer public int colorTransfer = Format.NO_VALUE;
@C.ColorRange public int colorRange = Format.NO_VALUE;
public int maxContentLuminance = DEFAULT_MAX_CLL;
public int maxFrameAverageLuminance = DEFAULT_MAX_FALL;
public float primaryRChromaticityX = Format.NO_VALUE;
public float primaryRChromaticityY = Format.NO_VALUE;
public float primaryGChromaticityX = Format.NO_VALUE;
public float primaryGChromaticityY = Format.NO_VALUE;
public float primaryBChromaticityX = Format.NO_VALUE;
public float primaryBChromaticityY = Format.NO_VALUE;
public float whitePointChromaticityX = Format.NO_VALUE;
public float whitePointChromaticityY = Format.NO_VALUE;
public float maxMasteringLuminance = Format.NO_VALUE;
public float minMasteringLuminance = Format.NO_VALUE;
public byte @MonotonicNonNull [] dolbyVisionConfigBytes;
// Audio elements. Initially set to their default values.
public int channelCount = 1;
public int audioBitDepth = Format.NO_VALUE;
public int sampleRate = 8000;
public long codecDelayNs = 0;
public long seekPreRollNs = 0;
public @MonotonicNonNull TrueHdSampleRechunker trueHdSampleRechunker;
// Text elements.
public boolean flagForced;
public boolean flagDefault = true;
private String language = "eng";
// Set when the output is initialized. nalUnitLengthFieldLength is only set for H264/H265.
public @MonotonicNonNull TrackOutput output;
public int nalUnitLengthFieldLength;
/** Initializes the track with an output. */
@RequiresNonNull("codecId")
@EnsuresNonNull("this.output")
public void initializeOutput(ExtractorOutput output, int trackId) throws ParserException {
String mimeType;
int maxInputSize = Format.NO_VALUE;
@C.PcmEncoding int pcmEncoding = Format.NO_VALUE;
@Nullable List<byte[]> initializationData = null;
@Nullable String codecs = null;
switch (codecId) {
case CODEC_ID_VP8:
mimeType = MimeTypes.VIDEO_VP8;
break;
case CODEC_ID_VP9:
mimeType = MimeTypes.VIDEO_VP9;
break;
case CODEC_ID_AV1:
mimeType = MimeTypes.VIDEO_AV1;
break;
case CODEC_ID_MPEG2:
mimeType = MimeTypes.VIDEO_MPEG2;
break;
case CODEC_ID_MPEG4_SP:
case CODEC_ID_MPEG4_ASP:
case CODEC_ID_MPEG4_AP:
mimeType = MimeTypes.VIDEO_MP4V;
initializationData =
codecPrivate == null ? null : Collections.singletonList(codecPrivate);
break;
case CODEC_ID_H264:
mimeType = MimeTypes.VIDEO_H264;
AvcConfig avcConfig = AvcConfig.parse(new ParsableByteArray(getCodecPrivate(codecId)));
initializationData = avcConfig.initializationData;
nalUnitLengthFieldLength = avcConfig.nalUnitLengthFieldLength;
codecs = avcConfig.codecs;
break;
case CODEC_ID_H265:
mimeType = MimeTypes.VIDEO_H265;
HevcConfig hevcConfig = HevcConfig.parse(new ParsableByteArray(getCodecPrivate(codecId)));
initializationData = hevcConfig.initializationData;
nalUnitLengthFieldLength = hevcConfig.nalUnitLengthFieldLength;
codecs = hevcConfig.codecs;
break;
case CODEC_ID_FOURCC:
Pair<String, @NullableType List<byte[]>> pair =
parseFourCcPrivate(new ParsableByteArray(getCodecPrivate(codecId)));
mimeType = pair.first;
initializationData = pair.second;
break;
case CODEC_ID_THEORA:
// TODO: This can be set to the real mimeType if/when we work out what initializationData
// should be set to for this case.
mimeType = MimeTypes.VIDEO_UNKNOWN;
break;
case CODEC_ID_VORBIS:
mimeType = MimeTypes.AUDIO_VORBIS;
maxInputSize = VORBIS_MAX_INPUT_SIZE;
initializationData = parseVorbisCodecPrivate(getCodecPrivate(codecId));
break;
case CODEC_ID_OPUS:
mimeType = MimeTypes.AUDIO_OPUS;
maxInputSize = OPUS_MAX_INPUT_SIZE;
initializationData = new ArrayList<>(3);
initializationData.add(getCodecPrivate(codecId));
initializationData.add(
ByteBuffer.allocate(8).order(ByteOrder.LITTLE_ENDIAN).putLong(codecDelayNs).array());
initializationData.add(
ByteBuffer.allocate(8).order(ByteOrder.LITTLE_ENDIAN).putLong(seekPreRollNs).array());
break;
case CODEC_ID_AAC:
mimeType = MimeTypes.AUDIO_AAC;
initializationData = Collections.singletonList(getCodecPrivate(codecId));
AacUtil.Config aacConfig = AacUtil.parseAudioSpecificConfig(codecPrivate);
// Update sampleRate and channelCount from the AudioSpecificConfig initialization data,
// which is more reliable. See [Internal: b/10903778].
sampleRate = aacConfig.sampleRateHz;
channelCount = aacConfig.channelCount;
codecs = aacConfig.codecs;
break;
case CODEC_ID_MP2:
mimeType = MimeTypes.AUDIO_MPEG_L2;
maxInputSize = MpegAudioUtil.MAX_FRAME_SIZE_BYTES;
break;
case CODEC_ID_MP3:
mimeType = MimeTypes.AUDIO_MPEG;
maxInputSize = MpegAudioUtil.MAX_FRAME_SIZE_BYTES;
break;
case CODEC_ID_AC3:
mimeType = MimeTypes.AUDIO_AC3;
break;
case CODEC_ID_E_AC3:
mimeType = MimeTypes.AUDIO_E_AC3;
break;
case CODEC_ID_TRUEHD:
mimeType = MimeTypes.AUDIO_TRUEHD;
trueHdSampleRechunker = new TrueHdSampleRechunker();
break;
case CODEC_ID_DTS:
case CODEC_ID_DTS_EXPRESS:
mimeType = MimeTypes.AUDIO_DTS;
break;
case CODEC_ID_DTS_LOSSLESS:
mimeType = MimeTypes.AUDIO_DTS_HD;
break;
case CODEC_ID_FLAC:
mimeType = MimeTypes.AUDIO_FLAC;
initializationData = Collections.singletonList(getCodecPrivate(codecId));
break;
case CODEC_ID_ACM:
mimeType = MimeTypes.AUDIO_RAW;
if (parseMsAcmCodecPrivate(new ParsableByteArray(getCodecPrivate(codecId)))) {
pcmEncoding = Util.getPcmEncoding(audioBitDepth);
if (pcmEncoding == C.ENCODING_INVALID) {
pcmEncoding = Format.NO_VALUE;
mimeType = MimeTypes.AUDIO_UNKNOWN;
Log.w(
TAG,
"Unsupported PCM bit depth: "
+ audioBitDepth
+ ". Setting mimeType to "
+ mimeType);
}
} else {
mimeType = MimeTypes.AUDIO_UNKNOWN;
Log.w(TAG, "Non-PCM MS/ACM is unsupported. Setting mimeType to " + mimeType);
}
break;
case CODEC_ID_PCM_INT_LIT:
mimeType = MimeTypes.AUDIO_RAW;
pcmEncoding = Util.getPcmEncoding(audioBitDepth);
if (pcmEncoding == C.ENCODING_INVALID) {
pcmEncoding = Format.NO_VALUE;
mimeType = MimeTypes.AUDIO_UNKNOWN;
Log.w(
TAG,
"Unsupported little endian PCM bit depth: "
+ audioBitDepth
+ ". Setting mimeType to "
+ mimeType);
}
break;
case CODEC_ID_PCM_INT_BIG:
mimeType = MimeTypes.AUDIO_RAW;
if (audioBitDepth == 8) {
pcmEncoding = C.ENCODING_PCM_8BIT;
} else if (audioBitDepth == 16) {
pcmEncoding = C.ENCODING_PCM_16BIT_BIG_ENDIAN;
} else {
pcmEncoding = Format.NO_VALUE;
mimeType = MimeTypes.AUDIO_UNKNOWN;
Log.w(
TAG,
"Unsupported big endian PCM bit depth: "
+ audioBitDepth
+ ". Setting mimeType to "
+ mimeType);
}
break;
case CODEC_ID_PCM_FLOAT:
mimeType = MimeTypes.AUDIO_RAW;
if (audioBitDepth == 32) {
pcmEncoding = C.ENCODING_PCM_FLOAT;
} else {
pcmEncoding = Format.NO_VALUE;
mimeType = MimeTypes.AUDIO_UNKNOWN;
Log.w(
TAG,
"Unsupported floating point PCM bit depth: "
+ audioBitDepth
+ ". Setting mimeType to "
+ mimeType);
}
break;
case CODEC_ID_SUBRIP:
mimeType = MimeTypes.APPLICATION_SUBRIP;
break;
case CODEC_ID_ASS:
mimeType = MimeTypes.TEXT_SSA;
initializationData = ImmutableList.of(SSA_DIALOGUE_FORMAT, getCodecPrivate(codecId));
break;
case CODEC_ID_VOBSUB:
mimeType = MimeTypes.APPLICATION_VOBSUB;
initializationData = ImmutableList.of(getCodecPrivate(codecId));
break;
case CODEC_ID_PGS:
mimeType = MimeTypes.APPLICATION_PGS;
break;
case CODEC_ID_DVBSUB:
mimeType = MimeTypes.APPLICATION_DVBSUBS;
// Init data: composition_page (2), ancillary_page (2)
byte[] initializationDataBytes = new byte[4];
System.arraycopy(getCodecPrivate(codecId), 0, initializationDataBytes, 0, 4);
initializationData = ImmutableList.of(initializationDataBytes);
break;
default:
throw ParserException.createForMalformedContainer(
"Unrecognized codec identifier.", /* cause= */ null);
}
if (dolbyVisionConfigBytes != null) {
@Nullable
DolbyVisionConfig dolbyVisionConfig =
DolbyVisionConfig.parse(new ParsableByteArray(this.dolbyVisionConfigBytes));
if (dolbyVisionConfig != null) {
codecs = dolbyVisionConfig.codecs;
mimeType = MimeTypes.VIDEO_DOLBY_VISION;
}
}
@C.SelectionFlags int selectionFlags = 0;
selectionFlags |= flagDefault ? C.SELECTION_FLAG_DEFAULT : 0;
selectionFlags |= flagForced ? C.SELECTION_FLAG_FORCED : 0;
int type;
Format.Builder formatBuilder = new Format.Builder();
// TODO: Consider reading the name elements of the tracks and, if present, incorporating them
// into the trackId passed when creating the formats.
if (MimeTypes.isAudio(mimeType)) {
type = C.TRACK_TYPE_AUDIO;
formatBuilder
.setChannelCount(channelCount)
.setSampleRate(sampleRate)
.setPcmEncoding(pcmEncoding);
} else if (MimeTypes.isVideo(mimeType)) {
type = C.TRACK_TYPE_VIDEO;
if (displayUnit == Track.DISPLAY_UNIT_PIXELS) {
displayWidth = displayWidth == Format.NO_VALUE ? width : displayWidth;
displayHeight = displayHeight == Format.NO_VALUE ? height : displayHeight;
}
float pixelWidthHeightRatio = Format.NO_VALUE;
if (displayWidth != Format.NO_VALUE && displayHeight != Format.NO_VALUE) {
pixelWidthHeightRatio = ((float) (height * displayWidth)) / (width * displayHeight);
}
@Nullable ColorInfo colorInfo = null;
if (hasColorInfo) {
@Nullable byte[] hdrStaticInfo = getHdrStaticInfo();
colorInfo = new ColorInfo(colorSpace, colorRange, colorTransfer, hdrStaticInfo);
}
int rotationDegrees = Format.NO_VALUE;
if (name != null && TRACK_NAME_TO_ROTATION_DEGREES.containsKey(name)) {
rotationDegrees = TRACK_NAME_TO_ROTATION_DEGREES.get(name);
}
if (projectionType == C.PROJECTION_RECTANGULAR
&& Float.compare(projectionPoseYaw, 0f) == 0
&& Float.compare(projectionPosePitch, 0f) == 0) {
// The range of projectionPoseRoll is [-180, 180].
if (Float.compare(projectionPoseRoll, 0f) == 0) {
rotationDegrees = 0;
} else if (Float.compare(projectionPosePitch, 90f) == 0) {
rotationDegrees = 90;
} else if (Float.compare(projectionPosePitch, -180f) == 0
|| Float.compare(projectionPosePitch, 180f) == 0) {
rotationDegrees = 180;
} else if (Float.compare(projectionPosePitch, -90f) == 0) {
rotationDegrees = 270;
}
}
formatBuilder
.setWidth(width)
.setHeight(height)
.setPixelWidthHeightRatio(pixelWidthHeightRatio)
.setRotationDegrees(rotationDegrees)
.setProjectionData(projectionData)
.setStereoMode(stereoMode)
.setColorInfo(colorInfo);
} else if (MimeTypes.APPLICATION_SUBRIP.equals(mimeType)
|| MimeTypes.TEXT_SSA.equals(mimeType)
|| MimeTypes.APPLICATION_VOBSUB.equals(mimeType)
|| MimeTypes.APPLICATION_PGS.equals(mimeType)
|| MimeTypes.APPLICATION_DVBSUBS.equals(mimeType)) {
type = C.TRACK_TYPE_TEXT;
} else {
throw ParserException.createForMalformedContainer(
"Unexpected MIME type.", /* cause= */ null);
}
if (name != null && !TRACK_NAME_TO_ROTATION_DEGREES.containsKey(name)) {
formatBuilder.setLabel(name);
}
Format format =
formatBuilder
.setId(trackId)
.setSampleMimeType(mimeType)
.setMaxInputSize(maxInputSize)
.setLanguage(language)
.setSelectionFlags(selectionFlags)
.setInitializationData(initializationData)
.setCodecs(codecs)
.setDrmInitData(drmInitData)
.build();
this.output = output.track(number, type);
this.output.format(format);
}
/** Forces any pending sample metadata to be flushed to the output. */
@RequiresNonNull("output")
public void outputPendingSampleMetadata() {
if (trueHdSampleRechunker != null) {
trueHdSampleRechunker.outputPendingSampleMetadata(output, cryptoData);
}
}
/** Resets any state stored in the track in response to a seek. */
public void reset() {
if (trueHdSampleRechunker != null) {
trueHdSampleRechunker.reset();
}
}
/** Returns the HDR Static Info as defined in CTA-861.3. */
@Nullable
private byte[] getHdrStaticInfo() {
// Are all fields present.
if (primaryRChromaticityX == Format.NO_VALUE
|| primaryRChromaticityY == Format.NO_VALUE
|| primaryGChromaticityX == Format.NO_VALUE
|| primaryGChromaticityY == Format.NO_VALUE
|| primaryBChromaticityX == Format.NO_VALUE
|| primaryBChromaticityY == Format.NO_VALUE
|| whitePointChromaticityX == Format.NO_VALUE
|| whitePointChromaticityY == Format.NO_VALUE
|| maxMasteringLuminance == Format.NO_VALUE
|| minMasteringLuminance == Format.NO_VALUE) {
return null;
}
byte[] hdrStaticInfoData = new byte[25];
ByteBuffer hdrStaticInfo = ByteBuffer.wrap(hdrStaticInfoData).order(ByteOrder.LITTLE_ENDIAN);
hdrStaticInfo.put((byte) 0); // Type.
hdrStaticInfo.putShort((short) ((primaryRChromaticityX * MAX_CHROMATICITY) + 0.5f));
hdrStaticInfo.putShort((short) ((primaryRChromaticityY * MAX_CHROMATICITY) + 0.5f));
hdrStaticInfo.putShort((short) ((primaryGChromaticityX * MAX_CHROMATICITY) + 0.5f));
hdrStaticInfo.putShort((short) ((primaryGChromaticityY * MAX_CHROMATICITY) + 0.5f));
hdrStaticInfo.putShort((short) ((primaryBChromaticityX * MAX_CHROMATICITY) + 0.5f));
hdrStaticInfo.putShort((short) ((primaryBChromaticityY * MAX_CHROMATICITY) + 0.5f));
hdrStaticInfo.putShort((short) ((whitePointChromaticityX * MAX_CHROMATICITY) + 0.5f));
hdrStaticInfo.putShort((short) ((whitePointChromaticityY * MAX_CHROMATICITY) + 0.5f));
hdrStaticInfo.putShort((short) (maxMasteringLuminance + 0.5f));
hdrStaticInfo.putShort((short) (minMasteringLuminance + 0.5f));
hdrStaticInfo.putShort((short) maxContentLuminance);
hdrStaticInfo.putShort((short) maxFrameAverageLuminance);
return hdrStaticInfoData;
}
/**
* Builds initialization data for a {@link Format} from FourCC codec private data.
*
* @return The codec mime type and initialization data. If the compression type is not supported
* then the mime type is set to {@link MimeTypes#VIDEO_UNKNOWN} and the initialization data
* is {@code null}.
* @throws ParserException If the initialization data could not be built.
*/
private static Pair<String, @NullableType List<byte[]>> parseFourCcPrivate(
ParsableByteArray buffer) throws ParserException {
try {
buffer.skipBytes(16); // size(4), width(4), height(4), planes(2), bitcount(2).
long compression = buffer.readLittleEndianUnsignedInt();
if (compression == FOURCC_COMPRESSION_DIVX) {
return new Pair<>(MimeTypes.VIDEO_DIVX, null);
} else if (compression == FOURCC_COMPRESSION_H263) {
return new Pair<>(MimeTypes.VIDEO_H263, null);
} else if (compression == FOURCC_COMPRESSION_VC1) {
// Search for the initialization data from the end of the BITMAPINFOHEADER. The last 20
// bytes of which are: sizeImage(4), xPel/m (4), yPel/m (4), clrUsed(4), clrImportant(4).
int startOffset = buffer.getPosition() + 20;
byte[] bufferData = buffer.getData();
for (int offset = startOffset; offset < bufferData.length - 4; offset++) {
if (bufferData[offset] == 0x00
&& bufferData[offset + 1] == 0x00
&& bufferData[offset + 2] == 0x01
&& bufferData[offset + 3] == 0x0F) {
// We've found the initialization data.
byte[] initializationData = Arrays.copyOfRange(bufferData, offset, bufferData.length);
return new Pair<>(MimeTypes.VIDEO_VC1, Collections.singletonList(initializationData));
}
}
throw ParserException.createForMalformedContainer(
"Failed to find FourCC VC1 initialization data", /* cause= */ null);
}
} catch (ArrayIndexOutOfBoundsException e) {
throw ParserException.createForMalformedContainer(
"Error parsing FourCC private data", /* cause= */ null);
}
Log.w(TAG, "Unknown FourCC. Setting mimeType to " + MimeTypes.VIDEO_UNKNOWN);
return new Pair<>(MimeTypes.VIDEO_UNKNOWN, null);
}
/**
* Builds initialization data for a {@link Format} from Vorbis codec private data.
*
* @return The initialization data for the {@link Format}.
* @throws ParserException If the initialization data could not be built.
*/
private static List<byte[]> parseVorbisCodecPrivate(byte[] codecPrivate)
throws ParserException {
try {
if (codecPrivate[0] != 0x02) {
throw ParserException.createForMalformedContainer(
"Error parsing vorbis codec private", /* cause= */ null);
}
int offset = 1;
int vorbisInfoLength = 0;
while ((codecPrivate[offset] & 0xFF) == 0xFF) {
vorbisInfoLength += 0xFF;
offset++;
}
vorbisInfoLength += codecPrivate[offset++] & 0xFF;
int vorbisSkipLength = 0;
while ((codecPrivate[offset] & 0xFF) == 0xFF) {
vorbisSkipLength += 0xFF;
offset++;
}
vorbisSkipLength += codecPrivate[offset++] & 0xFF;
if (codecPrivate[offset] != 0x01) {
throw ParserException.createForMalformedContainer(
"Error parsing vorbis codec private", /* cause= */ null);
}
byte[] vorbisInfo = new byte[vorbisInfoLength];
System.arraycopy(codecPrivate, offset, vorbisInfo, 0, vorbisInfoLength);
offset += vorbisInfoLength;
if (codecPrivate[offset] != 0x03) {
throw ParserException.createForMalformedContainer(
"Error parsing vorbis codec private", /* cause= */ null);
}
offset += vorbisSkipLength;
if (codecPrivate[offset] != 0x05) {
throw ParserException.createForMalformedContainer(
"Error parsing vorbis codec private", /* cause= */ null);
}
byte[] vorbisBooks = new byte[codecPrivate.length - offset];
System.arraycopy(codecPrivate, offset, vorbisBooks, 0, codecPrivate.length - offset);
List<byte[]> initializationData = new ArrayList<>(2);
initializationData.add(vorbisInfo);
initializationData.add(vorbisBooks);
return initializationData;
} catch (ArrayIndexOutOfBoundsException e) {
throw ParserException.createForMalformedContainer(
"Error parsing vorbis codec private", /* cause= */ null);
}
}
/**
* Parses an MS/ACM codec private, returning whether it indicates PCM audio.
*
* @return Whether the codec private indicates PCM audio.
* @throws ParserException If a parsing error occurs.
*/
private static boolean parseMsAcmCodecPrivate(ParsableByteArray buffer) throws ParserException {
try {
int formatTag = buffer.readLittleEndianUnsignedShort();
if (formatTag == WAVE_FORMAT_PCM) {
return true;
} else if (formatTag == WAVE_FORMAT_EXTENSIBLE) {
buffer.setPosition(WAVE_FORMAT_SIZE + 6); // unionSamples(2), channelMask(4)
return buffer.readLong() == WAVE_SUBFORMAT_PCM.getMostSignificantBits()
&& buffer.readLong() == WAVE_SUBFORMAT_PCM.getLeastSignificantBits();
} else {
return false;
}
} catch (ArrayIndexOutOfBoundsException e) {
throw ParserException.createForMalformedContainer(
"Error parsing MS/ACM codec private", /* cause= */ null);
}
}
/**
* Checks that the track has an output.
*
* <p>It is unfortunately not possible to mark {@link MatroskaExtractor#tracks} as only
* containing tracks with output with the nullness checker. This method is used to check that
* fact at runtime.
*/
@EnsuresNonNull("output")
private void assertOutputInitialized() {
checkNotNull(output);
}
@EnsuresNonNull("codecPrivate")
private byte[] getCodecPrivate(String codecId) throws ParserException {
if (codecPrivate == null) {
throw ParserException.createForMalformedContainer(
"Missing CodecPrivate for codec " + codecId, /* cause= */ null);
}
return codecPrivate;
}
}
}