Tracks parsing, SeekMap (Index) started

demos/main/src/main/assets/media.exolist.json

@@ -543,6 +543,11 @@
     "name": "Misc",
     "name": "Misc",
     "samples": [
     "samples": [
       {
       {
+        "name": "AVI",
+        "uri": "https://drive.google.com/u/0/uc?id=1K6oLKCS56WFbhz33TgilTJBqfMYFTeUd&?export=download",
+        "extension": "avi"
+      },
+      {
         "name": "Dizzy (MP4)",
         "name": "Dizzy (MP4)",
         "uri": "https://html5demos.com/assets/dizzy.mp4"
         "uri": "https://html5demos.com/assets/dizzy.mp4"
       },
       },

library/common/src/main/java/com/google/android/exoplayer2/util/FileTypes.java

@@ -38,7 +38,7 @@ public final class FileTypes {
   @Documented
   @Documented
   @Retention(RetentionPolicy.SOURCE)
   @Retention(RetentionPolicy.SOURCE)
   @IntDef({
   @IntDef({
-    UNKNOWN, AC3, AC4, ADTS, AMR, FLAC, FLV, MATROSKA, MP3, MP4, OGG, PS, TS, WAV, WEBVTT, JPEG
+    UNKNOWN, AC3, AC4, ADTS, AMR, FLAC, FLV, MATROSKA, MP3, MP4, OGG, PS, TS, WAV, WEBVTT, JPEG, AVI
   })
   })
   public @interface Type {}
   public @interface Type {}
   /** Unknown file type. */
   /** Unknown file type. */
@@ -73,6 +73,8 @@ public final class FileTypes {
   public static final int WEBVTT = 13;
   public static final int WEBVTT = 13;
   /** File type for the JPEG format. */
   /** File type for the JPEG format. */
   public static final int JPEG = 14;
   public static final int JPEG = 14;
+  /** File type for the AVI format. */
+  public static final int AVI = 15;
 
 
   @VisibleForTesting /* package */ static final String HEADER_CONTENT_TYPE = "Content-Type";
   @VisibleForTesting /* package */ static final String HEADER_CONTENT_TYPE = "Content-Type";
 
 
@@ -105,6 +107,7 @@ public final class FileTypes {
   private static final String EXTENSION_WEBVTT = ".webvtt";
   private static final String EXTENSION_WEBVTT = ".webvtt";
   private static final String EXTENSION_JPG = ".jpg";
   private static final String EXTENSION_JPG = ".jpg";
   private static final String EXTENSION_JPEG = ".jpeg";
   private static final String EXTENSION_JPEG = ".jpeg";
+  private static final String EXTENSION_AVI = ".avi";
 
 
   private FileTypes() {}
   private FileTypes() {}
 
 
@@ -167,6 +170,8 @@ public final class FileTypes {
         return FileTypes.WEBVTT;
         return FileTypes.WEBVTT;
       case MimeTypes.IMAGE_JPEG:
       case MimeTypes.IMAGE_JPEG:
         return FileTypes.JPEG;
         return FileTypes.JPEG;
+      case MimeTypes.VIDEO_AVI:
+        return FileTypes.AVI;
       default:
       default:
         return FileTypes.UNKNOWN;
         return FileTypes.UNKNOWN;
     }
     }
@@ -229,6 +234,8 @@ public final class FileTypes {
       return FileTypes.WEBVTT;
       return FileTypes.WEBVTT;
     } else if (filename.endsWith(EXTENSION_JPG) || filename.endsWith(EXTENSION_JPEG)) {
     } else if (filename.endsWith(EXTENSION_JPG) || filename.endsWith(EXTENSION_JPEG)) {
       return FileTypes.JPEG;
       return FileTypes.JPEG;
+    } else if (filename.endsWith(EXTENSION_AVI)) {
+      return FileTypes.AVI;
     } else {
     } else {
       return FileTypes.UNKNOWN;
       return FileTypes.UNKNOWN;
     }
     }

library/common/src/main/java/com/google/android/exoplayer2/util/MimeTypes.java

@@ -54,6 +54,7 @@ public final class MimeTypes {
   public static final String VIDEO_FLV = BASE_TYPE_VIDEO + "/x-flv";
   public static final String VIDEO_FLV = BASE_TYPE_VIDEO + "/x-flv";
   public static final String VIDEO_DOLBY_VISION = BASE_TYPE_VIDEO + "/dolby-vision";
   public static final String VIDEO_DOLBY_VISION = BASE_TYPE_VIDEO + "/dolby-vision";
   public static final String VIDEO_OGG = BASE_TYPE_VIDEO + "/ogg";
   public static final String VIDEO_OGG = BASE_TYPE_VIDEO + "/ogg";
+  public static final String VIDEO_AVI = BASE_TYPE_VIDEO + "/x-msvideo";
   public static final String VIDEO_UNKNOWN = BASE_TYPE_VIDEO + "/x-unknown";
   public static final String VIDEO_UNKNOWN = BASE_TYPE_VIDEO + "/x-unknown";
 
 
   // audio/ MIME types
   // audio/ MIME types

library/extractor/src/main/java/com/google/android/exoplayer2/extractor/DefaultExtractorsFactory.java

@@ -24,6 +24,7 @@ import androidx.annotation.Nullable;
 import com.google.android.exoplayer2.PlaybackException;
 import com.google.android.exoplayer2.PlaybackException;
 import com.google.android.exoplayer2.Player;
 import com.google.android.exoplayer2.Player;
 import com.google.android.exoplayer2.extractor.amr.AmrExtractor;
 import com.google.android.exoplayer2.extractor.amr.AmrExtractor;
+import com.google.android.exoplayer2.extractor.avi.AviExtractor;
 import com.google.android.exoplayer2.extractor.flac.FlacExtractor;
 import com.google.android.exoplayer2.extractor.flac.FlacExtractor;
 import com.google.android.exoplayer2.extractor.flv.FlvExtractor;
 import com.google.android.exoplayer2.extractor.flv.FlvExtractor;
 import com.google.android.exoplayer2.extractor.jpeg.JpegExtractor;
 import com.google.android.exoplayer2.extractor.jpeg.JpegExtractor;
@@ -99,6 +100,7 @@ public final class DefaultExtractorsFactory implements ExtractorsFactory {
         FileTypes.AC4,
         FileTypes.AC4,
         FileTypes.MP3,
         FileTypes.MP3,
         FileTypes.JPEG,
         FileTypes.JPEG,
+        FileTypes.AVI,
       };
       };
 
 
   private static final FlacExtensionLoader FLAC_EXTENSION_LOADER = new FlacExtensionLoader();
   private static final FlacExtensionLoader FLAC_EXTENSION_LOADER = new FlacExtensionLoader();
@@ -300,7 +302,7 @@ public final class DefaultExtractorsFactory implements ExtractorsFactory {
   @Override
   @Override
   public synchronized Extractor[] createExtractors(
   public synchronized Extractor[] createExtractors(
       Uri uri, Map<String, List<String>> responseHeaders) {
       Uri uri, Map<String, List<String>> responseHeaders) {
-    List<Extractor> extractors = new ArrayList<>(/* initialCapacity= */ 14);
+    List<Extractor> extractors = new ArrayList<>(/* initialCapacity= */ 15);
 
 
     @FileTypes.Type
     @FileTypes.Type
     int responseHeadersInferredFileType = inferFileTypeFromResponseHeaders(responseHeaders);
     int responseHeadersInferredFileType = inferFileTypeFromResponseHeaders(responseHeaders);
@@ -397,6 +399,9 @@ public final class DefaultExtractorsFactory implements ExtractorsFactory {
       case FileTypes.JPEG:
       case FileTypes.JPEG:
         extractors.add(new JpegExtractor());
         extractors.add(new JpegExtractor());
         break;
         break;
+      case FileTypes.AVI:
+        extractors.add(new AviExtractor());
+        break;
       case FileTypes.WEBVTT:
       case FileTypes.WEBVTT:
       case FileTypes.UNKNOWN:
       case FileTypes.UNKNOWN:
       default:
       default:

library/extractor/src/main/java/com/google/android/exoplayer2/extractor/avi/AudioFormat.java

+package com.google.android.exoplayer2.extractor.avi;
+
+import android.util.SparseArray;
+import com.google.android.exoplayer2.util.MimeTypes;
+import java.nio.ByteBuffer;
+
+public class AudioFormat {
+  public static short WAVE_FORMAT_PCM = 1;
+  public static short WAVE_FORMAT_MPEGLAYER3 = 0x55;
+  public static short WAVE_FORMAT_DVM = 0x2000; //AC3
+  public static short WAVE_FORMAT_DTS2 = 0x2001; //DTS
+  private static final SparseArray<String> FORMAT_MAP = new SparseArray<>();
+  static {
+    FORMAT_MAP.put(WAVE_FORMAT_PCM, MimeTypes.AUDIO_RAW);
+    FORMAT_MAP.put(WAVE_FORMAT_MPEGLAYER3, MimeTypes.AUDIO_MPEG);
+    FORMAT_MAP.put(WAVE_FORMAT_DVM, MimeTypes.AUDIO_AC3);
+    FORMAT_MAP.put(WAVE_FORMAT_DTS2, MimeTypes.AUDIO_DTS);
+  }
+
+  private ByteBuffer byteBuffer;
+
+  //WAVEFORMATEX
+  public AudioFormat(ByteBuffer byteBuffer) {
+    this.byteBuffer = byteBuffer;
+  }
+
+  public String getCodec() {
+    return FORMAT_MAP.get(getFormatTag() & 0xffff);
+  }
+
+  public short getFormatTag() {
+    return byteBuffer.getShort(0);
+  }
+  public short getChannels() {
+    return byteBuffer.getShort(2);
+  }
+  public int getSamplesPerSecond() {
+    return byteBuffer.getInt(4);
+  }
+  // 8 - nAvgBytesPerSec(uint)
+  // 12 - nBlockAlign(ushort)
+  public short getBitsPerSample() {
+    return byteBuffer.getShort(14);
+  }
+  public short getCbSize() {
+    return byteBuffer.getShort(16);
+  }
+  //TODO: Deal with  WAVEFORMATEXTENSIBLE
+}

library/extractor/src/main/java/com/google/android/exoplayer2/extractor/avi/AviExtractor.java

+package com.google.android.exoplayer2.extractor.avi;
+
+import androidx.annotation.Nullable;
+import com.google.android.exoplayer2.C;
+import com.google.android.exoplayer2.Format;
+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.PositionHolder;
+import com.google.android.exoplayer2.extractor.SeekMap;
+import com.google.android.exoplayer2.extractor.TrackOutput;
+import com.google.android.exoplayer2.util.Log;
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.nio.ByteOrder;
+import java.util.Collections;
+import java.util.List;
+
+public class AviExtractor implements Extractor {
+  static final String TAG = "AviExtractor";
+  private static final int PEEK_BYTES = 28;
+
+  private final int STATE_READ_TRACKS = 0;
+  private final int STATE_FIND_MOVI = 1;
+  private final int STATE_FIND_IDX1 = 2;
+  private final int STATE_READ_SAMPLES = 3;
+
+  static final int RIFF = AviUtil.toInt(new byte[]{'R','I','F','F'});
+  static final int AVI_ = AviUtil.toInt(new byte[]{'A','V','I',' '});
+  //Stream List
+  static final int STRL = 's' | ('t' << 8) | ('r' << 16) | ('l' << 24);
+  //Stream CODEC data
+  static final int STRD = 's' | ('t' << 8) | ('r' << 16) | ('d' << 24);
+  //movie data box
+  static final int MOVI = 'm' | ('o' << 8) | ('v' << 16) | ('i' << 24);
+  //Index
+  static final int IDX1 = 'i' | ('d' << 8) | ('x' << 16) | ('1' << 24);
+
+  private final int flags;
+
+  private int state;
+  private ExtractorOutput output;
+  private AviHeader aviHeader;
+  //After the movi position
+  private long firstChunkPosition;
+
+  public AviExtractor() {
+    this(0);
+  }
+
+  public AviExtractor(int flags) {
+    this.flags = flags;
+  }
+
+  @Override
+  public boolean sniff(ExtractorInput input) throws IOException {
+    return peakHeaderList(input);
+  }
+
+  static ByteBuffer allocate(int bytes) {
+    final byte[] buffer = new byte[bytes];
+    final ByteBuffer byteBuffer = ByteBuffer.wrap(buffer);
+    byteBuffer.order(ByteOrder.LITTLE_ENDIAN);
+    return byteBuffer;
+  }
+  boolean peakHeaderList(ExtractorInput input) throws IOException {
+    final ByteBuffer byteBuffer = allocate(PEEK_BYTES);
+    input.peekFully(byteBuffer.array(), 0, PEEK_BYTES);
+    final int riff = byteBuffer.getInt();
+    if (riff != AviExtractor.RIFF) {
+      return false;
+    }
+    long reportedLen = AviUtil.getUInt(byteBuffer) + byteBuffer.position();
+    final long inputLen = input.getLength();
+    if (inputLen != C.LENGTH_UNSET && inputLen != reportedLen) {
+      Log.w(TAG, "Header length doesn't match stream length");
+    }
+    int avi = byteBuffer.getInt();
+    if (avi != AviExtractor.AVI_) {
+      return false;
+    }
+    final int list = byteBuffer.getInt();
+    if (list != IAviList.LIST) {
+      return false;
+    }
+    //Len
+    byteBuffer.getInt();
+    final int hdrl = byteBuffer.getInt();
+    if (hdrl != IAviList.TYPE_HDRL) {
+      return false;
+    }
+    final int avih = byteBuffer.getInt();
+    if (avih != AviHeader.AVIH) {
+      return false;
+    }
+    return true;
+  }
+  @Nullable
+  ResidentList readHeaderList(ExtractorInput input) throws IOException {
+    final ByteBuffer byteBuffer = allocate(20);
+    input.readFully(byteBuffer.array(), 0, byteBuffer.capacity());
+    final int riff = byteBuffer.getInt();
+    if (riff != AviExtractor.RIFF) {
+      return null;
+    }
+    long reportedLen = AviUtil.getUInt(byteBuffer) + byteBuffer.position();
+    final long inputLen = input.getLength();
+    if (inputLen != C.LENGTH_UNSET && inputLen != reportedLen) {
+      Log.w(TAG, "Header length doesn't match stream length");
+    }
+    int avi = byteBuffer.getInt();
+    if (avi != AviExtractor.AVI_) {
+      return null;
+    }
+    final ResidentList header = ResidentList.getInstance(byteBuffer, input, ResidentList.class);
+    if (header == null) {
+      return null;
+    }
+    if (header.getListType() != IAviList.TYPE_HDRL) {
+      Log.e(TAG, "Expected " +AviUtil.toString(IAviList.TYPE_HDRL) + ", got: " +
+          AviUtil.toString(header.getType()));
+      return null;
+    }
+    return header;
+  }
+
+  long getDuration() {
+    if (aviHeader == null) {
+      return C.TIME_UNSET;
+    }
+    return aviHeader.getFrames() * (long)aviHeader.getMicroSecPerFrame();
+  }
+
+  @Override
+  public void init(ExtractorOutput output) {
+    this.state = STATE_READ_TRACKS;
+    this.output = output;
+  }
+
+  private static ResidentBox peekNext(final List<ResidentBox> streams, int i, int type) {
+    if (i + 1 < streams.size() && streams.get(i + 1).getType() == type) {
+      return streams.get(i + 1);
+    }
+    return null;
+  }
+
+  private int readTracks(ExtractorInput input) throws IOException {
+    final ResidentList headerList = readHeaderList(input);
+    if (headerList == null) {
+      throw new IOException("AVI Header List not found");
+    }
+    final List<ResidentBox> headerChildren = headerList.getBoxList();
+    aviHeader = AviUtil.getBox(headerChildren, AviHeader.class);
+    if (aviHeader == null) {
+      throw new IOException("AviHeader not found");
+    }
+    headerChildren.remove(aviHeader);
+    //headerChildren should only be Stream Lists now
+
+    int streamId = 0;
+    for (Box box : headerChildren) {
+      if (box instanceof ResidentList && ((ResidentList) box).getListType() == STRL) {
+        final ResidentList streamList = (ResidentList) box;
+        final List<ResidentBox> streamChildren = streamList.getBoxList();
+        for (int i=0;i<streamChildren.size();i++) {
+          final ResidentBox residentBox = streamChildren.get(i);
+          if (residentBox instanceof StreamHeader) {
+            final StreamHeader streamHeader = (StreamHeader) residentBox;
+            final StreamFormat streamFormat = (StreamFormat) peekNext(streamChildren, i, StreamFormat.STRF);
+            if (streamFormat != null) {
+              i++;
+              if (streamHeader.isVideo()) {
+                final VideoFormat videoFormat = streamFormat.getVideoFormat();
+                final ResidentBox codecBox = (ResidentBox) peekNext(streamChildren, i, STRD);
+                final List<byte[]> codecData;
+                if (codecBox != null) {
+                  codecData = Collections.singletonList(codecBox.byteBuffer.array());
+                  i++;
+                } else {
+                  codecData = null;
+                }
+                final TrackOutput trackOutput = output.track(streamId, C.TRACK_TYPE_VIDEO);
+                final Format.Builder builder = new Format.Builder();
+                builder.setWidth(videoFormat.getWidth());
+                builder.setHeight(videoFormat.getHeight());
+                builder.setFrameRate(streamHeader.getFrameRate());
+                builder.setCodecs(streamHeader.getCodec());
+                builder.setInitializationData(codecData);
+                trackOutput.format(builder.build());
+              } else if (streamHeader.isAudio()) {
+                final AudioFormat audioFormat = streamFormat.getAudioFormat();
+                final TrackOutput trackOutput = output.track(streamId, C.TRACK_TYPE_AUDIO);
+                final Format.Builder builder = new Format.Builder();
+                builder.setCodecs(audioFormat.getCodec());
+                builder.setChannelCount(audioFormat.getChannels());
+                builder.setSampleRate(audioFormat.getSamplesPerSecond());
+                if (audioFormat.getFormatTag() == AudioFormat.WAVE_FORMAT_PCM) {
+                  //TODO: Determine if this is LE or BE - Most likely LE
+                  final short bps = audioFormat.getBitsPerSample();
+                  if (bps == 8) {
+                    builder.setPcmEncoding(C.ENCODING_PCM_8BIT);
+                  } else if (bps == 16){
+                    builder.setPcmEncoding(C.ENCODING_PCM_16BIT);
+                  }
+                }
+                trackOutput.format(builder.build());
+              }
+            }
+            streamId++;
+          }
+        }
+      }
+    }
+    output.endTracks();
+    state = STATE_FIND_MOVI;
+    return RESULT_CONTINUE;
+  }
+
+  int findMovi(ExtractorInput input, PositionHolder seekPosition) throws IOException {
+    ByteBuffer byteBuffer = allocate(12);
+    input.readFully(byteBuffer.array(), 0,12);
+    final int tag = byteBuffer.getInt();
+    final long size = byteBuffer.getInt() & AviUtil.UINT_MASK;
+    final long position = input.getPosition();
+    //-4 because we over read for the LIST type
+    long nextBox = position + size - 4;
+    if (tag == IAviList.LIST) {
+      final int listType = byteBuffer.getInt();
+      if (listType == MOVI) {
+        firstChunkPosition = position;
+        if (aviHeader.hasIndex()) {
+          state = STATE_FIND_IDX1;
+        } else {
+          output.seekMap(new SeekMap.Unseekable(getDuration()));
+          state = STATE_READ_TRACKS;
+          nextBox = firstChunkPosition;
+        }
+      }
+    }
+    seekPosition.position = nextBox;
+    return RESULT_SEEK;
+  }
+
+  int findIdx1(ExtractorInput input, PositionHolder seekPosition) throws IOException {
+    ByteBuffer byteBuffer = allocate(8);
+    input.readFully(byteBuffer.array(), 0,8);
+    final int tag = byteBuffer.getInt();
+    long remaining = byteBuffer.getInt() & AviUtil.UINT_MASK;
+    //TODO: Sanity check on file length
+    if (tag == IDX1) {
+      final ByteBuffer index = allocate(4096);
+      final byte[] bytes = index.array();
+      index.position(index.capacity());
+      while (remaining > 0) {
+        if (!index.hasRemaining()) {
+          index.clear();
+          final int toRead = (int)Math.min(4096, remaining);
+          if (!input.readFully(bytes, 0, toRead, true)) {
+            seekPosition.position = firstChunkPosition;
+            output.seekMap(new SeekMap.Unseekable(getDuration()));
+            break;
+          }
+          index.limit(toRead);
+          remaining -=toRead;
+        }
+
+      }
+
+//TODO
+    } else {
+      seekPosition.position = input.getPosition() + remaining;
+    }
+    return RESULT_SEEK;
+  }
+
+  @Override
+  public int read(ExtractorInput input, PositionHolder seekPosition) throws IOException {
+    switch (state) {
+      case STATE_READ_TRACKS:
+        return readTracks(input);
+      case STATE_FIND_MOVI:
+        return findMovi(input, seekPosition);
+      case STATE_FIND_IDX1:
+        return findIdx1(input, seekPosition);
+    }
+    return RESULT_CONTINUE;
+  }
+
+  @Override
+  public void seek(long position, long timeUs) {
+
+  }
+
+  @Override
+  public void release() {
+
+  }
+}

library/extractor/src/main/java/com/google/android/exoplayer2/extractor/avi/AviHeader.java

+package com.google.android.exoplayer2.extractor.avi;
+
+import java.nio.ByteBuffer;
+
+public class AviHeader extends ResidentBox {
+  public static final int AVIF_HASINDEX = 0x10;
+  static final int AVIH = 'a' | ('v' << 8) | ('i' << 16) | ('h' << 24);
+
+  //AVIMAINHEADER
+
+  AviHeader(int type, int size, ByteBuffer byteBuffer) {
+    super(type, size, byteBuffer);
+  }
+
+  @Override
+  boolean assertType() {
+    return simpleAssert(AVIH);
+  }
+
+  boolean hasIndex() {
+    return (getFlags() & AVIF_HASINDEX) > 0;
+  }
+
+  int getMicroSecPerFrame() {
+    return byteBuffer.getInt(0);
+  }
+
+  //4 = dwMaxBytesPerSec
+  //8 = dwPaddingGranularity
+
+  int getFlags() {
+    return byteBuffer.getInt(12);
+  }
+
+  int getFrames() {
+    return byteBuffer.getInt(16);
+  }
+  //20 = dwInitialFrames
+
+  int getSuggestedBufferSize() {
+    return byteBuffer.getInt(24);
+  }
+
+  int getWidth() {
+    return byteBuffer.getInt(28);
+  }
+
+  int getHeight() {
+    return byteBuffer.getInt(32);
+  }
+}

library/extractor/src/main/java/com/google/android/exoplayer2/extractor/avi/AviUtil.java

+package com.google.android.exoplayer2.extractor.avi;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+import com.google.android.exoplayer2.extractor.ExtractorInput;
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.util.List;
+
+public class AviUtil {
+
+  static final long UINT_MASK = 0xffffffffL;
+
+  static int toInt(byte[] bytes) {
+    int i = 0;
+    for (int b=bytes.length - 1;b>=0;b--) {
+      i <<=8;
+      i |= bytes[b];
+    }
+    return i;
+  }
+
+  static long getUInt(ByteBuffer byteBuffer) {
+    return byteBuffer.getInt() & UINT_MASK;
+  }
+
+  static void copy(ByteBuffer source, ByteBuffer dest, int bytes) {
+    final int inLimit = source.limit();
+    source.limit(source.position() + bytes);
+    dest.put(source);
+    source.limit(inLimit);
+  }
+
+  static ByteBuffer getByteBuffer(final ByteBuffer source, final int size,
+      final ExtractorInput input) throws IOException {
+    final ByteBuffer byteBuffer = AviExtractor.allocate(size);
+    if (size < source.remaining()) {
+      copy(source, byteBuffer, size);
+    } else {
+      final int copy = source.remaining();
+      copy(source, byteBuffer, copy);
+      int remaining = size - copy;
+      final int offset = byteBuffer.position() + byteBuffer.arrayOffset();
+      input.readFully(byteBuffer.array(), offset, remaining, false);
+    }
+    return byteBuffer;
+  }
+
+  @NonNull
+  static String toString(int tag) {
+    final StringBuilder sb = new StringBuilder(4);
+    for (int i=0;i<4;i++) {
+      sb.append((char)(tag & 0xff));
+      tag >>=8;
+    }
+    return sb.toString();
+  }
+
+  @Nullable
+  static <T extends Box> T getBox(List<? extends Box> list, Class<T> clazz) {
+    for (Box box : list) {
+      if (box.getClass() == clazz) {
+        return (T)box;
+      }
+    }
+    return null;
+  }
+
+  @Nullable
+  static IAviList getSubList(List<? extends Box> list, int listType) {
+    for (Box box : list) {
+      if (IAviList.class.isInstance(box)) {
+        final IAviList aviList = (IAviList) box;
+        if (aviList.getListType() == listType) {
+          return aviList;
+        }
+      }
+    }
+    return null;
+  }
+}

library/extractor/src/main/java/com/google/android/exoplayer2/extractor/avi/Box.java

+package com.google.android.exoplayer2.extractor.avi;
+
+public class Box {
+  private final long size;
+  private final int type;
+
+  Box(int type, long size) {
+    this.type = type;
+    this.size = size;
+  }
+
+  public long getSize() {
+    return size;
+  }
+
+  public int getType() {
+    return type;
+  }
+
+  boolean simpleAssert(final int expected) {
+     return getType() == expected;
+  }
+
+  boolean assertType() {
+    //Generic box, nothing to assert
+    return true;
+  }
+}

library/extractor/src/main/java/com/google/android/exoplayer2/extractor/avi/IAviList.java

+package com.google.android.exoplayer2.extractor.avi;
+
+public interface IAviList {
+  int LIST = 'L' | ('I' << 8) | ('S' << 16) | ('T' << 24);
+  //Header List
+  int TYPE_HDRL = 'h' | ('d' << 8) | ('r' << 16) | ('l' << 24);
+
+  int getListType();
+}

library/extractor/src/main/java/com/google/android/exoplayer2/extractor/avi/ResidentBox.java

+package com.google.android.exoplayer2.extractor.avi;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+import com.google.android.exoplayer2.extractor.ExtractorInput;
+import com.google.android.exoplayer2.util.Log;
+import java.io.IOException;
+import java.lang.reflect.Constructor;
+import java.nio.BufferOverflowException;
+import java.nio.BufferUnderflowException;
+import java.nio.ByteBuffer;
+import java.nio.ByteOrder;
+import java.util.ArrayList;
+import java.util.List;
+
+public class ResidentBox extends Box {
+  private static final String TAG = AviExtractor.TAG;
+  final private static int MAX_RESIDENT = 2*1024;
+  final ByteBuffer byteBuffer;
+
+  private Class<? extends ResidentBox> getClass(final int type) {
+    switch (type) {
+      case AviHeader.AVIH:
+        return AviHeader.class;
+      case IAviList.LIST:
+        return ResidentList.class;
+      case StreamHeader.STRH:
+        return StreamHeader.class;
+      case StreamFormat.STRF:
+        return StreamFormat.class;
+      default:
+        return ResidentBox.class;
+    }
+  }
+
+  ResidentBox(int type, int size, ByteBuffer byteBuffer) {
+    super(type, size);
+    this.byteBuffer = byteBuffer;
+  }
+
+  /**
+   * List is not yet populated
+   * @param byteBuffer
+   * @return
+   * @throws IOException
+   */
+  @Nullable
+  public static <T extends ResidentBox> T getInstance(final ByteBuffer byteBuffer,
+      ExtractorInput input, Class<T> boxClass) throws IOException  {
+    if (byteBuffer.remaining() < 8) {
+      //Should not happen
+      throw new BufferUnderflowException();
+    }
+    final int type = byteBuffer.getInt();
+    final long size = AviUtil.getUInt(byteBuffer);
+    if (size > MAX_RESIDENT) {
+      throw new BufferOverflowException();
+    }
+    final ByteBuffer boxBuffer = AviUtil.getByteBuffer(byteBuffer, (int)size, input);
+    return newInstance(type, (int)size, boxBuffer, boxClass);
+  }
+
+  @Nullable
+  private static <T extends ResidentBox> T newInstance(int type, int size, ByteBuffer boxBuffer,
+      Class<T> boxClass) {
+    try {
+      final Constructor<T> constructor =
+          boxClass.getDeclaredConstructor(int.class, int.class, ByteBuffer.class);
+      T box = constructor.newInstance(type, size, boxBuffer);
+      if (!box.assertType()) {
+        Log.e(TAG, "Expected " + AviUtil.toString(type) + " got " + AviUtil.toString(box.getType()));
+        return null;
+      }
+      return box;
+    } catch (Exception e) {
+      Log.e(TAG, "Create box failed " + AviUtil.toString(type));
+      return null;
+    }
+  }
+
+
+  /**
+   * Returns shallow copy of this ByteBuffer with the position at 0
+   * @return
+   */
+  @NonNull
+  public ByteBuffer getByteBuffer() {
+    final ByteBuffer clone = byteBuffer.duplicate();
+    clone.order(ByteOrder.LITTLE_ENDIAN);
+    clone.clear();
+    return clone;
+  }
+
+  @NonNull
+  public List<ResidentBox> getBoxList() {
+    final ByteBuffer temp = getByteBuffer();
+    temp.position(4);
+    final List<ResidentBox> list = new ArrayList<>();
+    while (temp.hasRemaining()) {
+      final int type = temp.getInt();
+      final int size = temp.getInt();
+      final Class<? extends ResidentBox> clazz = getClass(type);
+      final ByteBuffer boxBuffer = AviExtractor.allocate(size);
+      AviUtil.copy(temp, boxBuffer, size);
+      final ResidentBox residentBox = newInstance(type, size, boxBuffer, clazz);
+      if (residentBox == null) {
+        break;
+      }
+      list.add(residentBox);
+    }
+    return list;
+  }
+}

library/extractor/src/main/java/com/google/android/exoplayer2/extractor/avi/ResidentList.java

+package com.google.android.exoplayer2.extractor.avi;
+
+import java.nio.ByteBuffer;
+
+/**
+ * An AVI LIST box, memory resident
+ */
+public class ResidentList extends ResidentBox implements IAviList {
+  private final int listType;
+
+  ResidentList(int type, int size, ByteBuffer byteBuffer) {
+    super(type, size, byteBuffer);
+    listType = byteBuffer.getInt(0);
+  }
+
+  @Override
+  public int getListType() {
+    return listType;
+  }
+
+  @Override
+  boolean assertType() {
+    return simpleAssert(LIST);
+  }
+}

library/extractor/src/main/java/com/google/android/exoplayer2/extractor/avi/StreamFormat.java

+package com.google.android.exoplayer2.extractor.avi;
+
+import androidx.annotation.NonNull;
+import java.nio.ByteBuffer;
+
+public class StreamFormat extends ResidentBox {
+  public static final int STRF = 's' | ('t' << 8) | ('r' << 16) | ('f' << 24);
+
+  StreamFormat(int type, int size, ByteBuffer byteBuffer) {
+    super(type, size, byteBuffer);
+  }
+
+  @NonNull
+  public VideoFormat getVideoFormat() {
+    return new VideoFormat(byteBuffer);
+  }
+
+  @NonNull
+  public AudioFormat getAudioFormat() {
+    return new AudioFormat(byteBuffer);
+  }
+}

library/extractor/src/main/java/com/google/android/exoplayer2/extractor/avi/StreamHeader.java

+package com.google.android.exoplayer2.extractor.avi;
+
+import android.util.SparseArray;
+import com.google.android.exoplayer2.util.MimeTypes;
+import java.nio.ByteBuffer;
+
+public class StreamHeader extends ResidentBox {
+  public static final int STRH = 's' | ('t' << 8) | ('r' << 16) | ('h' << 24);
+
+  //Audio Stream
+  private static final int AUDS = 'a' | ('u' << 8) | ('d' << 16) | ('s' << 24);
+
+  //Videos Stream
+  private static final int VIDS = 'v' | ('i' << 8) | ('d' << 16) | ('s' << 24);
+
+  private static final SparseArray<String> STREAM_MAP = new SparseArray<>();
+
+  static {
+    STREAM_MAP.put('M' | ('P' << 8) | ('4' << 16) | ('2' << 24), MimeTypes.VIDEO_MP4V);
+    STREAM_MAP.put('3' | ('V' << 8) | ('I' << 16) | ('D' << 24), MimeTypes.VIDEO_MP4V);
+    STREAM_MAP.put('x' | ('v' << 8) | ('i' << 16) | ('d' << 24), MimeTypes.VIDEO_MP4V);
+    STREAM_MAP.put('X' | ('V' << 8) | ('I' << 16) | ('D' << 24), MimeTypes.VIDEO_MP4V);
+
+    STREAM_MAP.put('m' | ('j' << 8) | ('p' << 16) | ('g' << 24), MimeTypes.IMAGE_JPEG);
+  }
+
+  StreamHeader(int type, int size, ByteBuffer byteBuffer) {
+    super(type, size, byteBuffer);
+  }
+
+  public boolean isAudio() {
+    return getSteamType() == AUDS;
+  }
+
+  public boolean isVideo() {
+    return getSteamType() == VIDS;
+  }
+
+  public float getFrameRate() {
+    return getRate() / (float)getScale();
+  }
+
+  public String getCodec() {
+    return STREAM_MAP.get(getFourCC());
+  }
+
+
+  public int getSteamType() {
+    return byteBuffer.getInt(0);
+  }
+  /**
+   * Only meaningful for video
+   * @return FourCC
+   */
+  public int getFourCC() {
+    return byteBuffer.getInt(4);
+  }
+  //8 - dwFlags
+  //12 - wPriority
+  //14 - wLanguage
+  public int getInitialFrames() {
+    return byteBuffer.getInt(16);
+  }
+  public int getScale() {
+    return byteBuffer.getInt(20);
+  }
+  public int getRate() {
+    return byteBuffer.getInt(24);
+  }
+  //28 - dwStart
+  public long getLength() {
+    return byteBuffer.getInt(32) & AviUtil.UINT_MASK;
+  }
+}

library/extractor/src/main/java/com/google/android/exoplayer2/extractor/avi/VideoFormat.java

+package com.google.android.exoplayer2.extractor.avi;
+
+import java.nio.ByteBuffer;
+
+public class VideoFormat {
+  private final ByteBuffer byteBuffer;
+
+  public VideoFormat(final ByteBuffer byteBuffer) {
+    this.byteBuffer = byteBuffer;
+  }
+
+  //biSize - (uint)
+
+  public int getWidth() {
+    return byteBuffer.getInt(4);
+  }
+  public int getHeight() {
+    return byteBuffer.getInt(8);
+  }
+
+}