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 <utils/Errors.h>
22#include <media/stagefright/MediaExtractor.h>
23
24namespace android {
25
26struct AMessage;
27class DataSource;
28class String8;
29
30class WAVExtractor : public MediaExtractor {
31public:
32    // Extractor assumes ownership of "source".
33    WAVExtractor(const sp<DataSource> &source);
34
35    virtual size_t countTracks();
36    virtual sp<MediaSource> getTrack(size_t index);
37    virtual sp<MetaData> getTrackMetaData(size_t index, uint32_t flags);
38
39    virtual sp<MetaData> getMetaData();
40
41protected:
42    virtual ~WAVExtractor();
43
44private:
45    sp<DataSource> mDataSource;
46    status_t mInitCheck;
47    bool mValidFormat;
48    uint16_t mWaveFormat;
49    uint16_t mNumChannels;
50    uint32_t mChannelMask;
51    uint32_t mSampleRate;
52    uint16_t mBitsPerSample;
53    off64_t mDataOffset;
54    size_t mDataSize;
55    sp<MetaData> mTrackMeta;
56
57    status_t init();
58
59    WAVExtractor(const WAVExtractor &);
60    WAVExtractor &operator=(const WAVExtractor &);
61};
62
63bool SniffWAV(
64        const sp<DataSource> &source, String8 *mimeType, float *confidence,
65        sp<AMessage> *);
66
67}  // namespace android
68
69#endif  // WAV_EXTRACTOR_H_
70
71