WAVExtractor.h revision c7fc37a3dab9bd1f96713649f351b5990e6316ff 
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
25struct AMessage;
26class DataSource;
27class String8;
28
29class WAVExtractor : public MediaExtractor {
30public:
31    // Extractor assumes ownership of "source".
32    WAVExtractor(const sp<DataSource> &source);
33
34    virtual size_t countTracks();
35    virtual sp<MediaSource> getTrack(size_t index);
36    virtual sp<MetaData> getTrackMetaData(size_t index, uint32_t flags);
37
38    virtual sp<MetaData> getMetaData();
39
40protected:
41    virtual ~WAVExtractor();
42
43private:
44    sp<DataSource> mDataSource;
45    status_t mInitCheck;
46    bool mValidFormat;
47    uint16_t mWaveFormat;
48    uint16_t mNumChannels;
49    uint32_t mSampleRate;
50    uint16_t mBitsPerSample;
51    off64_t mDataOffset;
52    size_t mDataSize;
53    sp<MetaData> mTrackMeta;
54
55    status_t init();
56
57    WAVExtractor(const WAVExtractor &);
58    WAVExtractor &operator=(const WAVExtractor &);
59};
60
61bool SniffWAV(
62        const sp<DataSource> &source, String8 *mimeType, float *confidence,
63        sp<AMessage> *);
64
65}  // namespace android
66
67#endif  // WAV_EXTRACTOR_H_
68
69