LibsndfileSource.h revision 2dd4bdd715f586d4d30cf90cc6fc2bbfbce60fe0 
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_LIBSNDFILE_SOURCE_H
18#define ANDROID_AUDIO_LIBSNDFILE_SOURCE_H
19
20#include "NBAIO.h"
21#include "sndfile.h"
22
23// Implementation of NBAIO_Source that wraps a libsndfile opened in SFM_READ mode
24
25namespace android {
26
27class LibsndfileSource : public NBAIO_Source {
28
29public:
30    // If 'loop' is true and it permits seeking, then we'll act as an infinite source
31    LibsndfileSource(SNDFILE *sndfile, const SF_INFO &sfinfo, bool loop = false);
32    virtual ~LibsndfileSource();
33
34    // NBAIO_Port interface
35
36    //virtual ssize_t negotiate(const NBAIO_Format offers[], size_t numOffers,
37    //                          NBAIO_Format counterOffers[], size_t& numCounterOffers);
38    //virtual NBAIO_Format format() const;
39
40    // NBAIO_Source interface
41
42    //virtual size_t framesRead() const;
43    //virtual size_t framesOverrun();
44    //virtual size_t overruns();
45    virtual ssize_t availableToRead();
46    virtual ssize_t read(void *buffer, size_t count);
47    //virtual ssize_t readVia(readVia_t via, size_t total, void *user, size_t block);
48
49private:
50    SNDFILE *   mSndfile;
51    sf_count_t  mEstimatedFramesUntilEOF;
52    bool        mLooping;
53    bool        mReadAnyFramesThisLoopCycle;
54};
55
56}   // namespace android
57
58#endif  // ANDROID_AUDIO_LIBSNDFILE_SOURCE_H
59