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Move DumpableBox into test-util module

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We need to use this class in muxer's robolectric and instrumentation tests, hence moving it to test-util module.

PiperOrigin-RevId: 512047605
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sheenachhabra 2023-02-24 13:38:56 +00:00 committed by tonihei
parent fd0a8cadc6
commit 51f8d103dc
1 changed files with 68 additions and 0 deletions
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68
testutils/src/main/java/com/google/android/exoplayer2/testutil/DumpableMp4Box.java Normal file
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/*
* Copyright 2023 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.testutil;
import com.google.android.exoplayer2.util.Assertions;
import com.google.android.exoplayer2.util.ParsableByteArray;
import com.google.common.collect.ImmutableSet;
import java.nio.ByteBuffer;
/** Wraps an Mp4 box to allow dumping it. */
public final class DumpableMp4Box implements Dumper.Dumpable {
private static final ImmutableSet<String> CONTAINER_BOXES =
ImmutableSet.of("moov", "trak", "mdia", "minf", "stbl", "edts", "meta");
private final ParsableByteArray box;
/***
* Creates an instance.
*
* @param box The Mp4 box to wrap.
*/
public DumpableMp4Box(ByteBuffer box) {
this.box = new ParsableByteArray(box.array());
}
@Override
public void dump(Dumper dumper) {
dumpBoxRecursively(box.limit(), dumper);
}
private void dumpBoxRecursively(long endPosition, Dumper dumper) {
while (box.getPosition() < endPosition) {
long size = box.readInt();
String name = box.readString(/* length= */ 4);
long payloadSize = size - 8;
// When the box needs 64-bit box size (typically used for mdat box), then the original 32-bit
// box size is set to 1.
if (size == 1) {
size = box.readUnsignedLongToLong();
// Parsing is not supported for box having size > Integer.MAX_VALUE.
Assertions.checkState(size <= Integer.MAX_VALUE);
// Subtract 4 bytes (32-bit box size) + 4 bytes (box name) + 8 bytes (64-bit box size).
payloadSize = size - 16;
}
dumper.startBlock(name + " (" + size + " bytes)");
if (CONTAINER_BOXES.contains(name)) {
dumpBoxRecursively(box.getPosition() + payloadSize, dumper);
} else {
byte[] data = new byte[(int) payloadSize];
box.readBytes(data, /* offset= */ 0, (int) payloadSize);
dumper.add("Data", data);
}
dumper.endBlock();
}
}
}