WAVExtractor.h revision 42d66f25af9cb8089a93c6796876a6bc16e36cea 
1/*
2 * Copyright (C) 2009 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 WAV_EXTRACTOR_H_
18
19#define WAV_EXTRACTOR_H_
20
21#include <media/stagefright/MediaExtractor.h>
22
23namespace android {
24
25class DataSource;
26class String8;
27
28class WAVExtractor : public MediaExtractor {
29public:
30    // Extractor assumes ownership of "source".
31    WAVExtractor(const sp<DataSource> &source);
32
33    virtual size_t countTracks();
34    virtual sp<MediaSource> getTrack(size_t index);
35    virtual sp<MetaData> getTrackMetaData(size_t index, uint32_t flags);
36
37    virtual sp<MetaData> getMetaData();
38
39protected:
40    virtual ~WAVExtractor();
41
42private:
43    sp<DataSource> mDataSource;
44    status_t mInitCheck;
45    bool mValidFormat;
46    uint16_t mWaveFormat;
47    uint16_t mNumChannels;
48    uint32_t mSampleRate;
49    uint16_t mBitsPerSample;
50    off_t mDataOffset;
51    size_t mDataSize;
52    sp<MetaData> mTrackMeta;
53
54    status_t init();
55
56    WAVExtractor(const WAVExtractor &);
57    WAVExtractor &operator=(const WAVExtractor &);
58};
59
60bool SniffWAV(
61        const sp<DataSource> &source, String8 *mimeType, float *confidence);
62
63}  // namespace android
64
65#endif  // WAV_EXTRACTOR_H_
66
67