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 <utils/Errors.h>
22 #include <media/stagefright/MediaExtractor.h>
23 
24 namespace android {
25 
26 struct AMessage;
27 class DataSource;
28 struct MP3Seeker;
29 class String8;
30 
31 class MP3Extractor : public MediaExtractor {
32 public:
33     // Extractor assumes ownership of "source".
34     MP3Extractor(const sp<DataSource> &source, const sp<AMessage> &meta);
35 
36     virtual size_t countTracks();
37     virtual sp<IMediaSource> getTrack(size_t index);
38     virtual sp<MetaData> getTrackMetaData(size_t index, uint32_t flags);
39 
40     virtual sp<MetaData> getMetaData();
name()41     virtual const char * name() { return "MP3Extractor"; }
42 
43 private:
44     status_t mInitCheck;
45 
46     sp<DataSource> mDataSource;
47     off64_t mFirstFramePos;
48     sp<MetaData> mMeta;
49     uint32_t mFixedHeader;
50     sp<MP3Seeker> mSeeker;
51 
52     MP3Extractor(const MP3Extractor &);
53     MP3Extractor &operator=(const MP3Extractor &);
54 };
55 
56 bool SniffMP3(
57         const sp<DataSource> &source, String8 *mimeType, float *confidence,
58         sp<AMessage> *meta);
59 
60 }  // namespace android
61 
62 #endif  // MP3_EXTRACTOR_H_
63