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<IMediaSource> getTrack(size_t index);
37    virtual sp<MetaData> getTrackMetaData(size_t index, uint32_t flags);
38
39    virtual sp<MetaData> getMetaData();
40    virtual const char * name() { return "WAVExtractor"; }
41
42protected:
43    virtual ~WAVExtractor();
44
45private:
46    sp<DataSource> mDataSource;
47    status_t mInitCheck;
48    bool mValidFormat;
49    uint16_t mWaveFormat;
50    uint16_t mNumChannels;
51    uint32_t mChannelMask;
52    uint32_t mSampleRate;
53    uint16_t mBitsPerSample;
54    off64_t mDataOffset;
55    size_t mDataSize;
56    sp<MetaData> mTrackMeta;
57
58    status_t init();
59
60    WAVExtractor(const WAVExtractor &);
61    WAVExtractor &operator=(const WAVExtractor &);
62};
63
64bool SniffWAV(
65        const sp<DataSource> &source, String8 *mimeType, float *confidence,
66        sp<AMessage> *);
67
68}  // namespace android
69
70#endif  // WAV_EXTRACTOR_H_
71
72