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/*
* Copyright 2018 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 androidx.media;
import android.content.res.AssetFileDescriptor;
import android.util.Log;
import java.io.IOException;
import java.io.InputStream;
/**
* A Media2DataSource that reads from a byte array for use in tests.
*/
public class TestMedia2DataSource extends Media2DataSource {
private static final String TAG = "TestMedia2DataSource";
private byte[] mData;
private boolean mThrowFromReadAt;
private boolean mThrowFromGetSize;
private Integer mReturnFromReadAt;
private Long mReturnFromGetSize;
private boolean mIsClosed;
// Read an asset fd into a new byte array data source. Closes afd.
public static TestMedia2DataSource fromAssetFd(AssetFileDescriptor afd) throws IOException {
try {
InputStream in = afd.createInputStream();
final int size = (int) afd.getDeclaredLength();
byte[] data = new byte[(int) size];
int writeIndex = 0;
int numRead = 0;
do {
numRead = in.read(data, writeIndex, size - writeIndex);
writeIndex += numRead;
} while (numRead >= 0);
return new TestMedia2DataSource(data);
} finally {
afd.close();
}
}
public TestMedia2DataSource(byte[] data) {
mData = data;
}
@Override
public synchronized int readAt(long position, byte[] buffer, int offset, int size)
throws IOException {
if (mThrowFromReadAt) {
throw new IOException("Test exception from readAt()");
}
if (mReturnFromReadAt != null) {
return mReturnFromReadAt;
}
// Clamp reads past the end of the source.
if (position >= mData.length) {
return -1; // -1 indicates EOF
}
if (position + size > mData.length) {
size -= (position + size) - mData.length;
}
System.arraycopy(mData, (int) position, buffer, offset, size);
return size;
}
@Override
public synchronized long getSize() throws IOException {
if (mThrowFromGetSize) {
throw new IOException("Test exception from getSize()");
}
if (mReturnFromGetSize != null) {
return mReturnFromGetSize;
}
Log.v(TAG, "getSize: " + mData.length);
return mData.length;
}
// Note: it's fine to keep using this data source after closing it.
@Override
public synchronized void close() {
Log.v(TAG, "close()");
mIsClosed = true;
}
// Whether close() has been called.
public synchronized boolean isClosed() {
return mIsClosed;
}
public void throwFromReadAt() {
mThrowFromReadAt = true;
}
public void throwFromGetSize() {
mThrowFromGetSize = true;
}
public void returnFromReadAt(int numRead) {
mReturnFromReadAt = numRead;
}
public void returnFromGetSize(long size) {
mReturnFromGetSize = size;
}
}
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