1 /*
2  * Copyright (C) 2015 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 
17 package com.android.tv.tuner.source;
18 
19 import com.android.tv.tuner.api.ScanChannel;
20 import com.android.tv.tuner.data.TunerChannel;
21 
22 /**
23  * Interface definition for a stream generator. The interface will provide streams for scanning
24  * channels and/or playback.
25  */
26 public interface TsStreamer {
27     /**
28      * Starts streaming the data for channel scanning process.
29      *
30      * @param channel {@link ScanChannel} to be scanned
31      * @return {@code true} if ready to stream, otherwise {@code false}
32      */
startStream(ScanChannel channel)33     boolean startStream(ScanChannel channel);
34 
35     /**
36      * Starts streaming the data for channel playing or recording.
37      *
38      * @param channel {@link TunerChannel} to tune
39      * @return {@code true} if ready to stream, otherwise {@code false}
40      */
startStream(TunerChannel channel)41     boolean startStream(TunerChannel channel);
42 
43     /** Stops streaming the data. */
stopStream()44     void stopStream();
45 
46     /**
47      * Creates {@link TsDataSource} which will provide MPEG-2 TS stream for {@link
48      * android.media.MediaExtractor}. The source will start from the position where it is created.
49      *
50      * @return {@link TsDataSource}
51      */
createDataSource()52     TsDataSource createDataSource();
53 }
54