EncodedDataImpl.java
/*
* Copyright 2020 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.camera.video.internal.encoder;
import android.media.MediaCodec;
import androidx.annotation.NonNull;
import androidx.annotation.RequiresApi;
import androidx.camera.core.impl.utils.futures.Futures;
import androidx.concurrent.futures.CallbackToFutureAdapter;
import androidx.core.util.Preconditions;
import com.google.common.util.concurrent.ListenableFuture;
import java.nio.ByteBuffer;
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.concurrent.atomic.AtomicReference;
/** {@inheritDoc} */
@RequiresApi(21) // TODO(b/200306659): Remove and replace with annotation on package-info.java
public class EncodedDataImpl implements EncodedData {
private final MediaCodec mMediaCodec;
private final MediaCodec.BufferInfo mBufferInfo;
private final int mBufferIndex;
private final ByteBuffer mByteBuffer;
private final ListenableFuture<Void> mClosedFuture;
private final CallbackToFutureAdapter.Completer<Void> mClosedCompleter;
private final AtomicBoolean mClosed = new AtomicBoolean(false);
EncodedDataImpl(@NonNull MediaCodec mediaCodec, int bufferIndex,
@NonNull MediaCodec.BufferInfo bufferInfo) throws MediaCodec.CodecException {
mMediaCodec = Preconditions.checkNotNull(mediaCodec);
mBufferIndex = bufferIndex;
mByteBuffer = mediaCodec.getOutputBuffer(bufferIndex);
mBufferInfo = Preconditions.checkNotNull(bufferInfo);
AtomicReference<CallbackToFutureAdapter.Completer<Void>> ref = new AtomicReference<>();
mClosedFuture = CallbackToFutureAdapter.getFuture(
completer -> {
ref.set(completer);
return "Data closed";
});
mClosedCompleter = Preconditions.checkNotNull(ref.get());
}
/** {@inheritDoc} */
@Override
@NonNull
public ByteBuffer getByteBuffer() {
throwIfClosed();
mByteBuffer.position(mBufferInfo.offset);
mByteBuffer.limit(mBufferInfo.offset + mBufferInfo.size);
return mByteBuffer;
}
/** {@inheritDoc} */
@Override
@NonNull
public MediaCodec.BufferInfo getBufferInfo() {
return mBufferInfo;
}
/** {@inheritDoc} */
@Override
public long getPresentationTimeUs() {
return mBufferInfo.presentationTimeUs;
}
/** {@inheritDoc} */
@Override
public long size() {
return mBufferInfo.size;
}
/** {@inheritDoc} */
@Override
public boolean isKeyFrame() {
return (mBufferInfo.flags & MediaCodec.BUFFER_FLAG_KEY_FRAME) != 0;
}
/** {@inheritDoc} */
@Override
public void close() {
if (mClosed.getAndSet(true)) {
return;
}
try {
mMediaCodec.releaseOutputBuffer(mBufferIndex, false);
} catch (IllegalStateException e) {
mClosedCompleter.setException(e);
return;
}
mClosedCompleter.set(null);
}
/** {@inheritDoc} */
@Override
@NonNull
public ListenableFuture<Void> getClosedFuture() {
return Futures.nonCancellationPropagating(mClosedFuture);
}
private void throwIfClosed() {
if (mClosed.get()) {
throw new IllegalStateException("encoded data is closed.");
}
}
}