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
25namespace android {
26
27class AudioBufferProviderSource : public NBAIO_Source {
28
29public:
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);
46    virtual ssize_t readVia(readVia_t via, size_t total, void *user, size_t block);
47
48private:
49    AudioBufferProvider * const mProvider;
50    AudioBufferProvider::Buffer mBuffer;    // current buffer
51    size_t                      mConsumed;  // number of frames consumed so far from current buffer
52};
53
54}   // namespace android
55
56#endif  // ANDROID_AUDIO_BUFFER_PROVIDER_SOURCE_H
57