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.text;
18
19import androidx.media.filterfw.Filter;
20import androidx.media.filterfw.FrameType;
21import androidx.media.filterfw.FrameValue;
22import androidx.media.filterfw.MffContext;
23import androidx.media.filterfw.OutputPort;
24import androidx.media.filterfw.Signature;
25
26public class ToStringFilter extends Filter {
27
28    public ToStringFilter(MffContext context, String name) {
29        super(context, name);
30    }
31
32    @Override
33    public Signature getSignature() {
34        return new Signature()
35            .addInputPort("object", Signature.PORT_REQUIRED, FrameType.single())
36            .addOutputPort("string", Signature.PORT_REQUIRED, FrameType.single(String.class))
37            .disallowOtherPorts();
38    }
39
40    @Override
41    protected void onProcess() {
42        FrameValue objectFrame = getConnectedInputPort("object").pullFrame().asFrameValue();
43        String outStr = objectFrame.getValue().toString();
44        OutputPort outPort = getConnectedOutputPort("string");
45        FrameValue stringFrame = outPort.fetchAvailableFrame(null).asFrameValue();
46        stringFrame.setValue(outStr);
47        outPort.pushFrame(stringFrame);
48    }
49
50}
51
52