MP3Extractor.h revision fc9ba09e3bb368f823d473f5e2bb9aa32dba6289 
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
25class DataSource;
26class String8;
27
28class MP3Extractor : public MediaExtractor {
29public:
30    // Extractor assumes ownership of "source".
31    MP3Extractor(const sp<DataSource> &source);
32
33    virtual size_t countTracks();
34    virtual sp<MediaSource> getTrack(size_t index);
35    virtual sp<MetaData> getTrackMetaData(size_t index, uint32_t flags);
36
37    virtual sp<MetaData> getMetaData();
38
39protected:
40    virtual ~MP3Extractor();
41
42private:
43    sp<DataSource> mDataSource;
44    off_t mFirstFramePos;
45    sp<MetaData> mMeta;
46    uint32_t mFixedHeader;
47    int32_t mByteNumber; // total number of bytes in this MP3
48    char mTableOfContents[99]; // TOC entries in XING header
49
50    MP3Extractor(const MP3Extractor &);
51    MP3Extractor &operator=(const MP3Extractor &);
52};
53
54bool SniffMP3(
55        const sp<DataSource> &source, String8 *mimeType, float *confidence);
56
57}  // namespace android
58
59#endif  // MP3_EXTRACTOR_H_
60