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      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 struct 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