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 AMR_EXTRACTOR_H_
18
19#define AMR_EXTRACTOR_H_
20
21#include <utils/Errors.h>
22#include <media/stagefright/MediaExtractor.h>
23
24namespace android {
25
26struct AMessage;
27class String8;
28#define OFFSET_TABLE_LEN    300
29
30class AMRExtractor : public MediaExtractor {
31public:
32    AMRExtractor(const sp<DataSource> &source);
33
34    virtual size_t countTracks();
35    virtual sp<IMediaSource> getTrack(size_t index);
36    virtual sp<MetaData> getTrackMetaData(size_t index, uint32_t flags);
37
38    virtual sp<MetaData> getMetaData();
39    virtual const char * name() { return "AMRExtractor"; }
40
41protected:
42    virtual ~AMRExtractor();
43
44private:
45    sp<DataSource> mDataSource;
46    sp<MetaData> mMeta;
47    status_t mInitCheck;
48    bool mIsWide;
49
50    off64_t mOffsetTable[OFFSET_TABLE_LEN]; //5 min
51    size_t mOffsetTableLength;
52
53    AMRExtractor(const AMRExtractor &);
54    AMRExtractor &operator=(const AMRExtractor &);
55};
56
57bool SniffAMR(
58        const sp<DataSource> &source, String8 *mimeType, float *confidence,
59        sp<AMessage> *);
60
61}  // namespace android
62
63#endif  // AMR_EXTRACTOR_H_
64