Merge pull request #9915 from dburckh:avi

PiperOrigin-RevId: 455094147

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

@@ -42,7 +42,7 @@ public final class FileTypes {
   @Target(TYPE_USE)
   @IntDef({
     UNKNOWN, AC3, AC4, ADTS, AMR, FLAC, FLV, MATROSKA, MP3, MP4, OGG, PS, TS, WAV, WEBVTT, JPEG,
-    MIDI
+    MIDI, AVI
   })
   public @interface Type {}
   /** Unknown file type. */
@@ -79,6 +79,8 @@ public final class FileTypes {
   public static final int JPEG = 14;
   /** File type for the MIDI format. */
   public static final int MIDI = 15;
+  /** File type for the AVI format. */
+  public static final int AVI = 16;
 
   @VisibleForTesting /* package */ static final String HEADER_CONTENT_TYPE = "Content-Type";
 
@@ -114,6 +116,7 @@ public final class FileTypes {
   private static final String EXTENSION_WEBVTT = ".webvtt";
   private static final String EXTENSION_JPG = ".jpg";
   private static final String EXTENSION_JPEG = ".jpeg";
+  private static final String EXTENSION_AVI = ".avi";
 
   private FileTypes() {}
 
@@ -177,6 +180,8 @@ public final class FileTypes {
         return FileTypes.WEBVTT;
       case MimeTypes.IMAGE_JPEG:
         return FileTypes.JPEG;
+      case MimeTypes.VIDEO_AVI:
+        return FileTypes.AVI;
       default:
         return FileTypes.UNKNOWN;
     }
@@ -242,6 +247,8 @@ public final class FileTypes {
       return FileTypes.WEBVTT;
     } else if (filename.endsWith(EXTENSION_JPG) || filename.endsWith(EXTENSION_JPEG)) {
       return FileTypes.JPEG;
+    } else if (filename.endsWith(EXTENSION_AVI)) {
+      return FileTypes.AVI;
     } else {
       return FileTypes.UNKNOWN;
     }

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

@@ -54,6 +54,10 @@ public final class MimeTypes {
   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_OGG = BASE_TYPE_VIDEO + "/ogg";
+  public static final String VIDEO_AVI = BASE_TYPE_VIDEO + "/x-msvideo";
+  public static final String VIDEO_MJPEG = BASE_TYPE_VIDEO + "/mjpeg";
+  public static final String VIDEO_MP42 = BASE_TYPE_VIDEO + "/mp42";
+  public static final String VIDEO_MP43 = BASE_TYPE_VIDEO + "/mp43";
   public static final String VIDEO_UNKNOWN = BASE_TYPE_VIDEO + "/x-unknown";
 
   // 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.Player;
 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.flv.FlvExtractor;
 import com.google.android.exoplayer2.extractor.jpeg.JpegExtractor;
@@ -101,8 +102,11 @@ public final class DefaultExtractorsFactory implements ExtractorsFactory {
         FileTypes.AC3,
         FileTypes.AC4,
         FileTypes.MP3,
-        FileTypes.JPEG,
+        // The following extractors are not part of the optimized ordering, and were appended
+        // without further analysis.
+        FileTypes.AVI,
         FileTypes.MIDI,
+        FileTypes.JPEG,
       };
 
   private static final ExtensionLoader FLAC_EXTENSION_LOADER =
@@ -307,7 +311,8 @@ public final class DefaultExtractorsFactory implements ExtractorsFactory {
   @Override
   public synchronized Extractor[] createExtractors(
       Uri uri, Map<String, List<String>> responseHeaders) {
-    List<Extractor> extractors = new ArrayList<>(/* initialCapacity= */ 14);
+    List<Extractor> extractors =
+        new ArrayList<>(/* initialCapacity= */ DEFAULT_EXTRACTOR_ORDER.length);
 
     @FileTypes.Type
     int responseHeadersInferredFileType = inferFileTypeFromResponseHeaders(responseHeaders);
@@ -410,6 +415,9 @@ public final class DefaultExtractorsFactory implements ExtractorsFactory {
           extractors.add(midiExtractor);
         }
         break;
+      case FileTypes.AVI:
+        extractors.add(new AviExtractor());
+        break;
       case FileTypes.WEBVTT:
       case FileTypes.UNKNOWN:
       default:

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

+/*
+ * Copyright 2022 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.avi;
+
+/**
+ * A chunk, as defined in the AVI spec.
+ *
+ * <p>See https://docs.microsoft.com/en-us/windows/win32/directshow/avi-riff-file-reference.
+ */
+/* package */ interface AviChunk {
+
+  /** Returns the chunk type fourcc. */
+  int getType();
+}

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

+/*
+ * Copyright 2022 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.avi;
+
+import com.google.android.exoplayer2.util.ParsableByteArray;
+
+/** Wrapper around the AVIMAINHEADER structure */
+/* package */ final class AviMainHeaderChunk implements AviChunk {
+
+  private static final int AVIF_HAS_INDEX = 0x10;
+
+  public static AviMainHeaderChunk parseFrom(ParsableByteArray body) {
+    int microSecPerFrame = body.readLittleEndianInt();
+    body.skipBytes(8); // Skip dwMaxBytesPerSec (4 bytes), dwPaddingGranularity (4 bytes).
+    int flags = body.readLittleEndianInt();
+    int totalFrames = body.readLittleEndianInt();
+    body.skipBytes(4); // dwInitialFrames (4 bytes).
+    int streams = body.readLittleEndianInt();
+    body.skipBytes(12); // dwSuggestedBufferSize (4 bytes), dwWidth (4 bytes), dwHeight (4 bytes).
+    return new AviMainHeaderChunk(microSecPerFrame, flags, totalFrames, streams);
+  }
+
+  public final int frameDurationUs;
+  public final int flags;
+  public final int totalFrames;
+  public final int streams;
+
+  private AviMainHeaderChunk(int frameDurationUs, int flags, int totalFrames, int streams) {
+    this.frameDurationUs = frameDurationUs;
+    this.flags = flags;
+    this.totalFrames = totalFrames;
+    this.streams = streams;
+  }
+
+  @Override
+  public int getType() {
+    return AviExtractor.FOURCC_avih;
+  }
+
+  public boolean hasIndex() {
+    return (flags & AVIF_HAS_INDEX) == AVIF_HAS_INDEX;
+  }
+}

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

+/*
+ * Copyright 2022 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.avi;
+
+import com.google.android.exoplayer2.C;
+import com.google.android.exoplayer2.util.Log;
+import com.google.android.exoplayer2.util.ParsableByteArray;
+import com.google.android.exoplayer2.util.Util;
+
+/** Parses and holds information from the AVISTREAMHEADER structure. */
+/* package */ final class AviStreamHeaderChunk implements AviChunk {
+  private static final String TAG = "AviStreamHeaderChunk";
+
+  public static AviStreamHeaderChunk parseFrom(ParsableByteArray body) {
+    int streamType = body.readLittleEndianInt();
+    body.skipBytes(12); // fccHandler (4 bytes), dwFlags (4 bytes), wPriority (2 bytes),
+    // wLanguage (2 bytes).
+    int initialFrames = body.readLittleEndianInt();
+    int scale = body.readLittleEndianInt();
+    int rate = body.readLittleEndianInt();
+    body.skipBytes(4); // dwStart (4 bytes).
+    int length = body.readLittleEndianInt();
+    int suggestedBufferSize = body.readLittleEndianInt();
+    body.skipBytes(8); // dwQuality (4 bytes), dwSampleSize (4 bytes).
+    return new AviStreamHeaderChunk(
+        streamType, initialFrames, scale, rate, length, suggestedBufferSize);
+  }
+
+  public final int streamType;
+  public final int initialFrames;
+  public final int scale;
+  public final int rate;
+  public final int length;
+  public final int suggestedBufferSize;
+
+  private AviStreamHeaderChunk(
+      int streamType, int initialFrames, int scale, int rate, int length, int suggestedBufferSize) {
+    this.streamType = streamType;
+    this.initialFrames = initialFrames;
+    this.scale = scale;
+    this.rate = rate;
+    this.length = length;
+    this.suggestedBufferSize = suggestedBufferSize;
+  }
+
+  @Override
+  public int getType() {
+    return AviExtractor.FOURCC_strh;
+  }
+
+  public @C.TrackType int getTrackType() {
+    switch (streamType) {
+      case AviExtractor.FOURCC_auds:
+        return C.TRACK_TYPE_AUDIO;
+      case AviExtractor.FOURCC_vids:
+        return C.TRACK_TYPE_VIDEO;
+      case AviExtractor.FOURCC_txts:
+        return C.TRACK_TYPE_TEXT;
+      default:
+        Log.w(TAG, "Found unsupported streamType fourCC: " + Integer.toHexString(streamType));
+        return C.TRACK_TYPE_UNKNOWN;
+    }
+  }
+
+  public float getFrameRate() {
+    return rate / (float) scale;
+  }
+
+  public long getDurationUs() {
+    return Util.scaleLargeTimestamp(
+        /* timestamp= */ length,
+        /* multiplier= */ C.MICROS_PER_SECOND * scale,
+        /* divisor= */ rate);
+  }
+}

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

+/*
+ * Copyright 2022 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.avi;
+
+import static java.lang.annotation.ElementType.TYPE_USE;
+
+import androidx.annotation.IntDef;
+import com.google.android.exoplayer2.C;
+import com.google.android.exoplayer2.extractor.ExtractorInput;
+import com.google.android.exoplayer2.extractor.SeekMap;
+import com.google.android.exoplayer2.extractor.SeekPoint;
+import com.google.android.exoplayer2.extractor.TrackOutput;
+import com.google.android.exoplayer2.util.Assertions;
+import com.google.android.exoplayer2.util.Util;
+import java.io.IOException;
+import java.lang.annotation.Documented;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+import java.util.Arrays;
+
+/** Reads chunks holding sample data. */
+/* package */ final class ChunkReader {
+
+  /** Parser states. */
+  @Documented
+  @Retention(RetentionPolicy.SOURCE)
+  @Target(TYPE_USE)
+  @IntDef({
+    CHUNK_TYPE_VIDEO_COMPRESSED,
+    CHUNK_TYPE_VIDEO_UNCOMPRESSED,
+    CHUNK_TYPE_AUDIO,
+  })
+  private @interface ChunkType {}
+
+  private static final int INITIAL_INDEX_SIZE = 512;
+  private static final int CHUNK_TYPE_VIDEO_COMPRESSED = ('d' << 16) | ('c' << 24);
+  private static final int CHUNK_TYPE_VIDEO_UNCOMPRESSED = ('d' << 16) | ('b' << 24);
+  private static final int CHUNK_TYPE_AUDIO = ('w' << 16) | ('b' << 24);
+
+  protected final TrackOutput trackOutput;
+
+  /** The chunk id fourCC (example: `01wb`), as defined in the index and the movi. */
+  private final int chunkId;
+  /** Secondary chunk id. Bad muxers sometimes use an uncompressed video id (db) for key frames */
+  private final int alternativeChunkId;
+
+  private final long durationUs;
+  private final int streamHeaderChunkCount;
+
+  private int currentChunkSize;
+  private int bytesRemainingInCurrentChunk;
+
+  /** Number of chunks as calculated by the index */
+  private int currentChunkIndex;
+
+  private int indexChunkCount;
+  private int indexSize;
+  private long[] keyFrameOffsets;
+  private int[] keyFrameIndices;
+
+  public ChunkReader(
+      int id,
+      @C.TrackType int trackType,
+      long durationnUs,
+      int streamHeaderChunkCount,
+      TrackOutput trackOutput) {
+    Assertions.checkArgument(trackType == C.TRACK_TYPE_AUDIO || trackType == C.TRACK_TYPE_VIDEO);
+    this.durationUs = durationnUs;
+    this.streamHeaderChunkCount = streamHeaderChunkCount;
+    this.trackOutput = trackOutput;
+    @ChunkType
+    int chunkType =
+        trackType == C.TRACK_TYPE_VIDEO ? CHUNK_TYPE_VIDEO_COMPRESSED : CHUNK_TYPE_AUDIO;
+    chunkId = getChunkIdFourCc(id, chunkType);
+    alternativeChunkId =
+        trackType == C.TRACK_TYPE_VIDEO ? getChunkIdFourCc(id, CHUNK_TYPE_VIDEO_UNCOMPRESSED) : -1;
+    keyFrameOffsets = new long[INITIAL_INDEX_SIZE];
+    keyFrameIndices = new int[INITIAL_INDEX_SIZE];
+  }
+
+  public void appendKeyFrameToIndex(long offset) {
+    if (indexSize == keyFrameIndices.length) {
+      keyFrameOffsets = Arrays.copyOf(keyFrameOffsets, keyFrameOffsets.length * 3 / 2);
+      keyFrameIndices = Arrays.copyOf(keyFrameIndices, keyFrameIndices.length * 3 / 2);
+    }
+    keyFrameOffsets[indexSize] = offset;
+    keyFrameIndices[indexSize] = indexChunkCount;
+    indexSize++;
+  }
+
+  public void advanceCurrentChunk() {
+    currentChunkIndex++;
+  }
+
+  public long getCurrentChunkTimestampUs() {
+    return getChunkTimestampUs(currentChunkIndex);
+  }
+
+  public long getFrameDurationUs() {
+    return getChunkTimestampUs(/* chunkIndex= */ 1);
+  }
+
+  public void incrementIndexChunkCount() {
+    indexChunkCount++;
+  }
+
+  public void compactIndex() {
+    keyFrameOffsets = Arrays.copyOf(keyFrameOffsets, indexSize);
+    keyFrameIndices = Arrays.copyOf(keyFrameIndices, indexSize);
+  }
+
+  public boolean handlesChunkId(int chunkId) {
+    return this.chunkId == chunkId || alternativeChunkId == chunkId;
+  }
+
+  public boolean isCurrentFrameAKeyFrame() {
+    return Arrays.binarySearch(keyFrameIndices, currentChunkIndex) >= 0;
+  }
+
+  public boolean isVideo() {
+    return (chunkId & CHUNK_TYPE_VIDEO_COMPRESSED) == CHUNK_TYPE_VIDEO_COMPRESSED;
+  }
+
+  public boolean isAudio() {
+    return (chunkId & CHUNK_TYPE_AUDIO) == CHUNK_TYPE_AUDIO;
+  }
+
+  /** Prepares for parsing a chunk with the given {@code size}. */
+  public void onChunkStart(int size) {
+    currentChunkSize = size;
+    bytesRemainingInCurrentChunk = size;
+  }
+
+  /**
+   * Provides data associated to the current chunk and returns whether the full chunk has been
+   * parsed.
+   */
+  public boolean onChunkData(ExtractorInput input) throws IOException {
+    bytesRemainingInCurrentChunk -=
+        trackOutput.sampleData(input, bytesRemainingInCurrentChunk, false);
+    boolean done = bytesRemainingInCurrentChunk == 0;
+    if (done) {
+      if (currentChunkSize > 0) {
+        trackOutput.sampleMetadata(
+            getCurrentChunkTimestampUs(),
+            (isCurrentFrameAKeyFrame() ? C.BUFFER_FLAG_KEY_FRAME : 0),
+            currentChunkSize,
+            0,
+            null);
+      }
+      advanceCurrentChunk();
+    }
+    return done;
+  }
+
+  public void seekToPosition(long position) {
+    if (indexSize == 0) {
+      currentChunkIndex = 0;
+    } else {
+      int index =
+          Util.binarySearchFloor(
+              keyFrameOffsets, position, /* inclusive= */ true, /* stayInBounds= */ true);
+      currentChunkIndex = keyFrameIndices[index];
+    }
+  }
+
+  public SeekMap.SeekPoints getSeekPoints(long timeUs) {
+    int targetFrameIndex = (int) (timeUs / getFrameDurationUs());
+    int keyFrameIndex =
+        Util.binarySearchFloor(
+            keyFrameIndices, targetFrameIndex, /* inclusive= */ true, /* stayInBounds= */ true);
+    if (keyFrameIndices[keyFrameIndex] == targetFrameIndex) {
+      return new SeekMap.SeekPoints(getSeekPoint(keyFrameIndex));
+    }
+    // The target frame is not a key frame, we look for the two closest ones.
+    SeekPoint precedingKeyFrameSeekPoint = getSeekPoint(keyFrameIndex);
+    if (keyFrameIndex + 1 < keyFrameOffsets.length) {
+      return new SeekMap.SeekPoints(precedingKeyFrameSeekPoint, getSeekPoint(keyFrameIndex + 1));
+    } else {
+      return new SeekMap.SeekPoints(precedingKeyFrameSeekPoint);
+    }
+  }
+
+  private long getChunkTimestampUs(int chunkIndex) {
+    return durationUs * chunkIndex / streamHeaderChunkCount;
+  }
+
+  private SeekPoint getSeekPoint(int keyFrameIndex) {
+    return new SeekPoint(
+        keyFrameIndices[keyFrameIndex] * getFrameDurationUs(), keyFrameOffsets[keyFrameIndex]);
+  }
+
+  private static int getChunkIdFourCc(int streamId, @ChunkType int chunkType) {
+    int tens = streamId / 10;
+    int ones = streamId % 10;
+    return (('0' + ones) << 8) | ('0' + tens) | chunkType;
+  }
+}

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

+/*
+ * Copyright 2022 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.avi;
+
+import androidx.annotation.Nullable;
+import com.google.android.exoplayer2.C;
+import com.google.android.exoplayer2.util.ParsableByteArray;
+import com.google.common.collect.ImmutableList;
+
+/** Represents an AVI LIST. */
+/* package */ final class ListChunk implements AviChunk {
+
+  public static ListChunk parseFrom(int listType, ParsableByteArray body) {
+    ImmutableList.Builder<AviChunk> builder = new ImmutableList.Builder<>();
+    int listBodyEndPosition = body.limit();
+    @C.TrackType int currentTrackType = C.TRACK_TYPE_NONE;
+    while (body.bytesLeft() > 8) {
+      int type = body.readLittleEndianInt();
+      int size = body.readLittleEndianInt();
+      int innerBoxBodyEndPosition = body.getPosition() + size;
+      body.setLimit(innerBoxBodyEndPosition);
+      @Nullable AviChunk aviChunk;
+      if (type == AviExtractor.FOURCC_LIST) {
+        int innerListType = body.readLittleEndianInt();
+        aviChunk = parseFrom(innerListType, body);
+      } else {
+        aviChunk = createBox(type, currentTrackType, body);
+      }
+      if (aviChunk != null) {
+        if (aviChunk.getType() == AviExtractor.FOURCC_strh) {
+          currentTrackType = ((AviStreamHeaderChunk) aviChunk).getTrackType();
+        }
+        builder.add(aviChunk);
+      }
+      body.setPosition(innerBoxBodyEndPosition);
+      body.setLimit(listBodyEndPosition);
+    }
+    return new ListChunk(listType, builder.build());
+  }
+
+  public final ImmutableList<AviChunk> children;
+  private final int type;
+
+  private ListChunk(int type, ImmutableList<AviChunk> children) {
+    this.type = type;
+    this.children = children;
+  }
+
+  @Override
+  public int getType() {
+    return type;
+  }
+
+  @Nullable
+  @SuppressWarnings("unchecked")
+  public <T extends AviChunk> T getChild(Class<T> c) {
+    for (AviChunk aviChunk : children) {
+      if (aviChunk.getClass() == c) {
+        return (T) aviChunk;
+      }
+    }
+    return null;
+  }
+
+  @Nullable
+  private static AviChunk createBox(
+      int chunkType, @C.TrackType int trackType, ParsableByteArray body) {
+    switch (chunkType) {
+      case AviExtractor.FOURCC_avih:
+        return AviMainHeaderChunk.parseFrom(body);
+      case AviExtractor.FOURCC_strh:
+        return AviStreamHeaderChunk.parseFrom(body);
+      case AviExtractor.FOURCC_strf:
+        return StreamFormatChunk.parseFrom(trackType, body);
+      case AviExtractor.FOURCC_strn:
+        return StreamNameChunk.parseFrom(body);
+      default:
+        return null;
+    }
+  }
+}

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

+/*
+ * Copyright 2022 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.avi;
+
+import androidx.annotation.Nullable;
+import com.google.android.exoplayer2.C;
+import com.google.android.exoplayer2.Format;
+import com.google.android.exoplayer2.util.Log;
+import com.google.android.exoplayer2.util.MimeTypes;
+import com.google.android.exoplayer2.util.ParsableByteArray;
+import com.google.android.exoplayer2.util.Util;
+import com.google.common.collect.ImmutableList;
+
+/** Holds the {@link Format} information contained in an STRF chunk. */
+/* package */ final class StreamFormatChunk implements AviChunk {
+  private static final String TAG = "StreamFormatChunk";
+
+  @Nullable
+  public static AviChunk parseFrom(int trackType, ParsableByteArray body) {
+    if (trackType == C.TRACK_TYPE_VIDEO) {
+      return parseBitmapInfoHeader(body);
+    } else if (trackType == C.TRACK_TYPE_AUDIO) {
+      return parseWaveFormatEx(body);
+    } else {
+      Log.w(
+          TAG,
+          "Ignoring strf box for unsupported track type: " + Util.getTrackTypeString(trackType));
+      return null;
+    }
+  }
+
+  public final Format format;
+
+  public StreamFormatChunk(Format format) {
+    this.format = format;
+  }
+
+  @Override
+  public int getType() {
+    return AviExtractor.FOURCC_strf;
+  }
+
+  @Nullable
+  private static AviChunk parseBitmapInfoHeader(ParsableByteArray body) {
+    body.skipBytes(4); // biSize.
+    int width = body.readLittleEndianInt();
+    int height = body.readLittleEndianInt();
+    body.skipBytes(4); // biPlanes (2 bytes), biBitCount (2 bytes).
+    int compression = body.readLittleEndianInt();
+    String mimeType = getMimeTypeFromCompression(compression);
+    if (mimeType == null) {
+      Log.w(TAG, "Ignoring track with unsupported compression " + compression);
+      return null;
+    }
+    Format.Builder formatBuilder = new Format.Builder();
+    formatBuilder.setWidth(width).setHeight(height).setSampleMimeType(mimeType);
+    return new StreamFormatChunk(formatBuilder.build());
+  }
+
+  // Syntax defined by the WAVEFORMATEX structure. See
+  // https://docs.microsoft.com/en-us/previous-versions/dd757713(v=vs.85).
+  @Nullable
+  private static AviChunk parseWaveFormatEx(ParsableByteArray body) {
+    int formatTag = body.readLittleEndianUnsignedShort();
+    @Nullable String mimeType = getMimeTypeFromTag(formatTag);
+    if (mimeType == null) {
+      Log.w(TAG, "Ignoring track with unsupported format tag " + formatTag);
+      return null;
+    }
+    int channelCount = body.readLittleEndianUnsignedShort();
+    int samplesPerSecond = body.readLittleEndianInt();
+    body.skipBytes(6); // averageBytesPerSecond (4 bytes), nBlockAlign (2 bytes).
+    int bitsPerSample = body.readUnsignedShort();
+    int pcmEncoding = Util.getPcmEncoding(bitsPerSample);
+    int cbSize = body.readLittleEndianUnsignedShort();
+    byte[] codecData = new byte[cbSize];
+    body.readBytes(codecData, /* offset= */ 0, codecData.length);
+
+    Format.Builder formatBuilder = new Format.Builder();
+    formatBuilder
+        .setSampleMimeType(mimeType)
+        .setChannelCount(channelCount)
+        .setSampleRate(samplesPerSecond);
+    if (MimeTypes.AUDIO_RAW.equals(mimeType) && pcmEncoding != C.ENCODING_INVALID) {
+      formatBuilder.setPcmEncoding(pcmEncoding);
+    }
+    if (MimeTypes.AUDIO_AAC.equals(mimeType) && codecData.length > 0) {
+      formatBuilder.setInitializationData(ImmutableList.of(codecData));
+    }
+    return new StreamFormatChunk(formatBuilder.build());
+  }
+
+  @Nullable
+  private static String getMimeTypeFromTag(int tag) {
+    switch (tag) {
+      case 0x1: // WAVE_FORMAT_PCM
+        return MimeTypes.AUDIO_RAW;
+      case 0x55: // WAVE_FORMAT_MPEGLAYER3
+        return MimeTypes.AUDIO_MPEG;
+      case 0xff: // WAVE_FORMAT_AAC
+        return MimeTypes.AUDIO_AAC;
+      case 0x2000: // WAVE_FORMAT_DVM - AC3
+        return MimeTypes.AUDIO_AC3;
+      case 0x2001: // WAVE_FORMAT_DTS2
+        return MimeTypes.AUDIO_DTS;
+      default:
+        return null;
+    }
+  }
+
+  @Nullable
+  private static String getMimeTypeFromCompression(int compression) {
+    switch (compression) {
+      case 0x3234504d: // MP42
+        return MimeTypes.VIDEO_MP42;
+      case 0x3334504d: // MP43
+        return MimeTypes.VIDEO_MP43;
+      case 0x34363248: // H264
+      case 0x31637661: // avc1
+      case 0x31435641: // AVC1
+        return MimeTypes.VIDEO_H264;
+      case 0x44495633: // 3VID
+      case 0x78766964: // divx
+      case 0x58564944: // DIVX
+      case 0x30355844: // DX50
+      case 0x34504d46: // FMP4
+      case 0x64697678: // xvid
+      case 0x44495658: // XVID
+        return MimeTypes.VIDEO_MP4V;
+      case 0x47504a4d: // MJPG
+      case 0x67706a6d: // mjpg
+        return MimeTypes.VIDEO_MJPEG;
+      default:
+        return null;
+    }
+  }
+}

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

+/*
+ * Copyright 2022 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.avi;
+
+import com.google.android.exoplayer2.util.ParsableByteArray;
+
+/** Parses and contains the name from the STRN chunk. */
+/* package */ final class StreamNameChunk implements AviChunk {
+
+  public static StreamNameChunk parseFrom(ParsableByteArray body) {
+    return new StreamNameChunk(body.readString(body.bytesLeft()));
+  }
+
+  public final String name;
+
+  private StreamNameChunk(String name) {
+    this.name = name;
+  }
+
+  @Override
+  public int getType() {
+    return AviExtractor.FOURCC_strn;
+  }
+}

library/extractor/src/main/java/com/google/android/exoplayer2/extractor/avi/package-info.java

+/*
+ * Copyright 2022 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.
+ */
+@NonNullApi
+package com.google.android.exoplayer2.extractor.avi;
+
+import com.google.android.exoplayer2.util.NonNullApi;

library/extractor/src/test/java/com/google/android/exoplayer2/extractor/DefaultExtractorsFactoryTest.java

@@ -20,6 +20,7 @@ import static com.google.common.truth.Truth.assertThat;
 import android.net.Uri;
 import androidx.test.ext.junit.runners.AndroidJUnit4;
 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.flv.FlvExtractor;
 import com.google.android.exoplayer2.extractor.jpeg.JpegExtractor;
@@ -70,6 +71,7 @@ public final class DefaultExtractorsFactoryTest {
             Ac3Extractor.class,
             Ac4Extractor.class,
             Mp3Extractor.class,
+            AviExtractor.class,
             JpegExtractor.class)
         .inOrder();
   }
@@ -112,6 +114,7 @@ public final class DefaultExtractorsFactoryTest {
             AdtsExtractor.class,
             Ac3Extractor.class,
             Ac4Extractor.class,
+            AviExtractor.class,
             JpegExtractor.class)
         .inOrder();
   }

library/extractor/src/test/java/com/google/android/exoplayer2/extractor/avi/AviExtractorTest.java

+/*
+ * Copyright 2022 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.avi;
+
+import com.google.android.exoplayer2.testutil.ExtractorAsserts;
+import com.google.common.collect.ImmutableList;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.robolectric.ParameterizedRobolectricTestRunner;
+import org.robolectric.ParameterizedRobolectricTestRunner.Parameter;
+import org.robolectric.ParameterizedRobolectricTestRunner.Parameters;
+
+/** Tests for {@link AviExtractor}. */
+@RunWith(ParameterizedRobolectricTestRunner.class)
+public final class AviExtractorTest {
+
+  @Parameters(name = "{0}")
+  public static ImmutableList<ExtractorAsserts.SimulationConfig> params() {
+    return ExtractorAsserts.configs();
+  }
+
+  @Parameter public ExtractorAsserts.SimulationConfig simulationConfig;
+
+  @Test
+  public void aviSample() throws Exception {
+    ExtractorAsserts.assertBehavior(AviExtractor::new, "media/avi/sample.avi", simulationConfig);
+  }
+}

testdata/src/test/assets/extractordumps/avi/sample.avi.3.dump

+seekMap:
+  isSeekable = true
+  duration = 4080000
+  getPosition(0) = [[timeUs=0, position=9996]]
+  getPosition(1) = [[timeUs=0, position=9996]]
+  getPosition(2040000) = [[timeUs=1835152, position=160708], [timeUs=2335648, position=198850]]
+  getPosition(4080000) = [[timeUs=3837136, position=308434]]
+numberOfTracks = 2
+track 0:
+  total output bytes = 17833
+  sample count = 6
+  format 0:
+    id = 0
+    sampleMimeType = video/mp4v-es
+    maxInputSize = 6761
+    width = 960
+    height = 400
+  sample 0:
+    time = 3837166
+    flags = 1
+    data = length 5356, hash 190A3CAE
+  sample 1:
+    time = 3878874
+    flags = 0
+    data = length 3172, hash 538FA2AE
+  sample 2:
+    time = 3920582
+    flags = 0
+    data = length 2393, hash 525B26D6
+  sample 3:
+    time = 3962291
+    flags = 0
+    data = length 2307, hash C894745F
+  sample 4:
+    time = 4003999
+    flags = 0
+    data = length 2490, hash 800FED70
+  sample 5:
+    time = 4045707
+    flags = 0
+    data = length 2115, hash A2512D3
+track 1:
+  total output bytes = 3840
+  sample count = 10
+  format 0:
+    id = 1
+    sampleMimeType = audio/mpeg
+    maxInputSize = 384
+    channelCount = 2
+    sampleRate = 48000
+  sample 0:
+    time = 3816000
+    flags = 1
+    data = length 384, hash 69E3E157
+  sample 1:
+    time = 3840000
+    flags = 1
+    data = length 384, hash AC90ADEC
+  sample 2:
+    time = 3864000
+    flags = 1
+    data = length 384, hash 6A333A56
+  sample 3:
+    time = 3888000
+    flags = 1
+    data = length 384, hash 493D75A3
+  sample 4:
+    time = 3912000
+    flags = 1
+    data = length 384, hash 53FE2A9E
+  sample 5:
+    time = 3936000
+    flags = 1
+    data = length 384, hash 65D6147C
+  sample 6:
+    time = 3960000
+    flags = 1
+    data = length 384, hash 5E744FB2
+  sample 7:
+    time = 3984000
+    flags = 1
+    data = length 384, hash 68AEB7CA
+  sample 8:
+    time = 4008000
+    flags = 1
+    data = length 384, hash AC2972C
+  sample 9:
+    time = 4032000
+    flags = 1
+    data = length 384, hash E2A06CB9
+tracksEnded = true