| /* |
| * Copyright (C) 2011 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.filterpacks.base; |
| |
| import androidx.media.filterfw.*; |
| |
| // TODO: Rename back to ValueSource? Seems to make more sense even if we use it as a Variable |
| // in some contexts. |
| public final class VariableSource extends Filter { |
| |
| private Object mValue = null; |
| private OutputPort mOutputPort = null; |
| |
| public VariableSource(MffContext context, String name) { |
| super(context, name); |
| } |
| |
| public synchronized void setValue(Object value) { |
| mValue = value; |
| } |
| |
| public synchronized Object getValue() { |
| return mValue; |
| } |
| |
| @Override |
| public Signature getSignature() { |
| return new Signature() |
| .addOutputPort("value", Signature.PORT_REQUIRED, FrameType.single()) |
| .disallowOtherPorts(); |
| } |
| |
| @Override |
| protected void onPrepare() { |
| mOutputPort = getConnectedOutputPort("value"); |
| } |
| |
| @Override |
| protected synchronized void onProcess() { |
| FrameValue frame = mOutputPort.fetchAvailableFrame(null).asFrameValue(); |
| frame.setValue(mValue); |
| mOutputPort.pushFrame(frame); |
| } |
| |
| } |
| |