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 // Implementation of NBAIO_Source that wraps an AudioBufferProvider
18 
19 #ifndef ANDROID_AUDIO_BUFFER_PROVIDER_SOURCE_H
20 #define ANDROID_AUDIO_BUFFER_PROVIDER_SOURCE_H
21 
22 #include "NBAIO.h"
23 #include <media/AudioBufferProvider.h>
24 
25 namespace android {
26 
27 class AudioBufferProviderSource : public NBAIO_Source {
28 
29 public:
30     AudioBufferProviderSource(AudioBufferProvider *provider, const NBAIO_Format& format);
31     virtual ~AudioBufferProviderSource();
32 
33     // NBAIO_Port interface
34 
35     //virtual ssize_t negotiate(const NBAIO_Format offers[], size_t numOffers,
36     //                          NBAIO_Format counterOffers[], size_t& numCounterOffers);
37     //virtual NBAIO_Format format();
38 
39     // NBAIO_Source interface
40 
41     //virtual size_t framesRead() const;
42     //virtual size_t framesOverrun();
43     //virtual size_t overruns();
44     virtual ssize_t availableToRead();
45     virtual ssize_t read(void *buffer, size_t count, int64_t readPTS);
46     virtual ssize_t readVia(readVia_t via, size_t total, void *user,
47                             int64_t readPTS, size_t block);
48 
49 private:
50     AudioBufferProvider * const mProvider;
51     AudioBufferProvider::Buffer mBuffer;    // current buffer
52     size_t                      mConsumed;  // number of frames consumed so far from current buffer
53 };
54 
55 }   // namespace android
56 
57 #endif  // ANDROID_AUDIO_BUFFER_PROVIDER_SOURCE_H
58