1 /*
2  * Copyright (C) 2012 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 #ifndef ANDROID_AUDIO_MONO_PIPE_READER_H
18 #define ANDROID_AUDIO_MONO_PIPE_READER_H
19 
20 #include "MonoPipe.h"
21 
22 namespace android {
23 
24 // MonoPipeReader is safe for only a single reader thread
25 class MonoPipeReader : public NBAIO_Source {
26 
27 public:
28 
29     // Construct a MonoPipeReader and associate it with a MonoPipe;
30     // any data already in the pipe is visible to this MonoPipeReader.
31     // There can be only a single MonoPipeReader per MonoPipe.
32     // FIXME make this constructor a factory method of MonoPipe.
33     MonoPipeReader(MonoPipe* pipe);
34     virtual ~MonoPipeReader();
35 
36     // NBAIO_Port interface
37 
38     //virtual ssize_t negotiate(const NBAIO_Format offers[], size_t numOffers,
39     //                          NBAIO_Format counterOffers[], size_t& numCounterOffers);
40     //virtual NBAIO_Format format() const;
41 
42     // NBAIO_Source interface
43 
44     //virtual size_t framesRead() const;
45     //virtual size_t framesOverrun();
46     //virtual size_t overruns();
47 
48     virtual ssize_t availableToRead();
49 
50     virtual ssize_t read(void *buffer, size_t count);
51 
52     virtual void    onTimestamp(const ExtendedTimestamp &timestamp);
53 
54     // NBAIO_Source end
55 
56 #if 0   // until necessary
57     MonoPipe* pipe() const { return mPipe; }
58 #endif
59 
60 private:
61     MonoPipe * const mPipe;
62     audio_utils_fifo_reader mFifoReader;
63 };
64 
65 }   // namespace android
66 
67 #endif  // ANDROID_AUDIO_MONO_PIPE_READER_H
68