MP3Extractor.h revision 5a1c3529e4fa2f8a11054181294e0ce79fff8dd3 
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 MP3_EXTRACTOR_H_
18
19#define MP3_EXTRACTOR_H_
20
21#include <media/stagefright/MediaExtractor.h>
22
23namespace android {
24
25struct AMessage;
26class DataSource;
27class String8;
28
29class MP3Extractor : public MediaExtractor {
30public:
31    // Extractor assumes ownership of "source".
32    MP3Extractor(const sp<DataSource> &source, const sp<AMessage> &meta);
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 ~MP3Extractor();
42
43private:
44    sp<DataSource> mDataSource;
45    off_t mFirstFramePos;
46    sp<MetaData> mMeta;
47    uint32_t mFixedHeader;
48    int32_t mByteNumber; // total number of bytes in this MP3
49    char mTableOfContents[99]; // TOC entries in XING header
50
51    MP3Extractor(const MP3Extractor &);
52    MP3Extractor &operator=(const MP3Extractor &);
53};
54
55bool SniffMP3(
56        const sp<DataSource> &source, String8 *mimeType, float *confidence,
57        sp<AMessage> *meta);
58
59}  // namespace android
60
61#endif  // MP3_EXTRACTOR_H_
62