1 /*
2  * Copyright (C) 2010 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 XING_SEEKER_H_
18 
19 #define XING_SEEKER_H_
20 
21 #include "include/MP3Seeker.h"
22 
23 namespace android {
24 
25 class DataSource;
26 
27 struct XINGSeeker : public MP3Seeker {
28     static sp<XINGSeeker> CreateFromSource(
29             const sp<DataSource> &source, off64_t first_frame_pos);
30 
31     virtual bool getDuration(int64_t *durationUs);
32     virtual bool getOffsetForTime(int64_t *timeUs, off64_t *pos);
33 
34     virtual int32_t getEncoderDelay();
35     virtual int32_t getEncoderPadding();
36 
37 private:
38     int64_t mFirstFramePos;
39     int64_t mDurationUs;
40     int32_t mSizeBytes;
41     int32_t mEncoderDelay;
42     int32_t mEncoderPadding;
43 
44     // TOC entries in XING header. Skip the first one since it's always 0.
45     unsigned char mTOC[99];
46     bool mTOCValid;
47 
48     XINGSeeker();
49 
50     DISALLOW_EVIL_CONSTRUCTORS(XINGSeeker);
51 };
52 
53 }  // namespace android
54 
55 #endif  // XING_SEEKER_H_
56 
57