text: /*
   * Copyright (C) 2009 The Android Open Source Project
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  #ifndef AMR_EXTRACTOR_H_
  
  #define AMR_EXTRACTOR_H_
  
  #include <utils/Errors.h>
  #include <media/MediaExtractorPluginApi.h>
  #include <media/MediaExtractorPluginHelper.h>
  #include <media/NdkMediaFormat.h>
  
  namespace android {
  
  struct AMessage;
  class String8;
  #define OFFSET_TABLE_LEN    300
  
  class AMRExtractor : public MediaExtractorPluginHelper {
  public:
      explicit AMRExtractor(DataSourceHelper *source);
  
      virtual size_t countTracks();
      virtual MediaTrackHelper *getTrack(size_t index);
      virtual media_status_t getTrackMetaData(AMediaFormat *meta, size_t index, uint32_t flags);
  
      virtual media_status_t getMetaData(AMediaFormat *meta);
      virtual const char * name() { return "AMRExtractor"; }
  
  protected:
      virtual ~AMRExtractor();
  
  private:
      DataSourceHelper *mDataSource;
      AMediaFormat *mMeta;
      status_t mInitCheck;
      bool mIsWide;
  
      off64_t mOffsetTable[OFFSET_TABLE_LEN]; //5 min
      size_t mOffsetTableLength;
  
      AMRExtractor(const AMRExtractor &);
      AMRExtractor &operator=(const AMRExtractor &);
  };
  
  }  // namespace android
  
  #endif  // AMR_EXTRACTOR_H_
  