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/*
* 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 org.mozilla.thirdparty.com.google.android.exoplayer2.upstream;
import android.net.Uri;
import androidx.annotation.Nullable;
import org.mozilla.thirdparty.com.google.android.exoplayer2.C;
import org.mozilla.thirdparty.com.google.android.exoplayer2.util.Assertions;
import java.io.IOException;
/** A {@link DataSource} for reading from a byte array. */
public final class ByteArrayDataSource extends BaseDataSource {
private final byte[] data;
@Nullable private Uri uri;
private int readPosition;
private int bytesRemaining;
private boolean opened;
/**
* @param data The data to be read.
*/
public ByteArrayDataSource(byte[] data) {
super(/* isNetwork= */ false);
Assertions.checkNotNull(data);
Assertions.checkArgument(data.length > 0);
this.data = data;
}
@Override
public long open(DataSpec dataSpec) throws IOException {
uri = dataSpec.uri;
transferInitializing(dataSpec);
readPosition = (int) dataSpec.position;
bytesRemaining = (int) ((dataSpec.length == C.LENGTH_UNSET)
? (data.length - dataSpec.position) : dataSpec.length);
if (bytesRemaining <= 0 || readPosition + bytesRemaining > data.length) {
throw new IOException("Unsatisfiable range: [" + readPosition + ", " + dataSpec.length
+ "], length: " + data.length);
}
opened = true;
transferStarted(dataSpec);
return bytesRemaining;
}
@Override
public int read(byte[] buffer, int offset, int readLength) {
if (readLength == 0) {
return 0;
} else if (bytesRemaining == 0) {
return C.RESULT_END_OF_INPUT;
}
readLength = Math.min(readLength, bytesRemaining);
System.arraycopy(data, readPosition, buffer, offset, readLength);
readPosition += readLength;
bytesRemaining -= readLength;
bytesTransferred(readLength);
return readLength;
}
@Override
@Nullable
public Uri getUri() {
return uri;
}
@Override
public void close() {
if (opened) {
opened = false;
transferEnded();
}
uri = null;
}
}
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