1/*
2 * Copyright (C) 2011 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package androidx.media.filterpacks.base;
18
19import androidx.media.filterfw.Filter;
20import androidx.media.filterfw.Frame;
21import androidx.media.filterfw.FrameType;
22import androidx.media.filterfw.InputPort;
23import androidx.media.filterfw.MffContext;
24import androidx.media.filterfw.OutputPort;
25import androidx.media.filterfw.Signature;
26
27public final class BranchFilter extends Filter {
28
29    private boolean mSynchronized = true;
30
31    public BranchFilter(MffContext context, String name) {
32        super(context, name);
33    }
34
35    public BranchFilter(MffContext context, String name, boolean synced) {
36        super(context, name);
37        mSynchronized = synced;
38    }
39
40    @Override
41    public Signature getSignature() {
42        return new Signature()
43            .addInputPort("input", Signature.PORT_REQUIRED, FrameType.any())
44            .addInputPort("synchronized", Signature.PORT_OPTIONAL,FrameType.single(boolean.class))
45            .disallowOtherInputs();
46    }
47
48    @Override
49    public void onInputPortOpen(InputPort port) {
50        if (port.getName().equals("input")) {
51            for (OutputPort outputPort : getConnectedOutputPorts()) {
52                port.attachToOutputPort(outputPort);
53            }
54        } else if (port.getName().equals("synchronized")) {
55            port.bindToFieldNamed("mSynchronized");
56            port.setAutoPullEnabled(true);
57        }
58    }
59
60    @Override
61    protected void onOpen() {
62        updateSynchronization();
63    }
64
65    @Override
66    protected void onProcess() {
67        Frame inputFrame = getConnectedInputPort("input").pullFrame();
68        for (OutputPort outputPort : getConnectedOutputPorts()) {
69            if (outputPort.isAvailable()) {
70                outputPort.pushFrame(inputFrame);
71            }
72        }
73    }
74
75    private void updateSynchronization() {
76        if (mSynchronized) {
77            for (OutputPort port : getConnectedOutputPorts()) {
78                port.setWaitsUntilAvailable(true);
79            }
80        } else {
81            for (OutputPort port : getConnectedOutputPorts()) {
82                port.setWaitsUntilAvailable(false);
83            }
84        }
85    }
86
87}
88
89