src/add-ons/media/plugins/mov_reader/libMOV/ChunkSuperIndex.cpp

   1 /*
   2  * Copyright (c) 2005, David McPaul
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without modification,
   6  * are permitted provided that the following conditions are met:
   7  *
   8  *  * Redistributions of source code must retain the above copyright notice,
   9  *    this list of conditions and the following disclaimer.
  10  *  * Redistributions in binary form must reproduce the above copyright notice,
  11  *    this list of conditions and the following disclaimer in the documentation
  12  *    and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
  15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  16  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  17  * IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
  18  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
  19  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  20  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  21  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
  22  * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  23  * OF THE POSSIBILITY OF SUCH DAMAGE.
  24  */
  25
  26 #include "ChunkSuperIndex.h"
  27
  28 ChunkSuperIndex::ChunkSuperIndex()
  29 {
  30 }
  31
  32 ChunkSuperIndex::~ChunkSuperIndex()
  33 {
  34         theChunkIndexArray.erase(theChunkIndexArray.begin(),theChunkIndexArray.end());
  35 }
  36
  37 void    ChunkSuperIndex::AddChunkIndex(uint32 stream, uint32 chunkid, off_t chunk_start)
  38 {
  39         ChunkIndexPtr   aChunkIndexPtr;
  40         aChunkIndexPtr = new ChunkIndex;
  41         aChunkIndexPtr->stream = stream;
  42         aChunkIndexPtr->chunkid = chunkid;
  43         aChunkIndexPtr->chunk_start = chunk_start;
  44
  45         theChunkIndexArray[chunk_start] = aChunkIndexPtr;
  46 }
  47
  48 uint32  ChunkSuperIndex::getChunkSize(uint32 stream, uint32 chunkid, off_t chunk_start)
  49 {
  50         ChunkIndexPtr   aChunkIndexPtr = theChunkIndexArray[chunk_start];
  51
  52         if (aChunkIndexPtr) {
  53                 // Find next chunkIndex
  54                 ChunkIndexPtr   nextChunkIndex;
  55
  56                 nextChunkIndex = theChunkIndexArray.upper_bound(chunk_start)->second;
  57
  58                 // Assert stream
  59                 // Assert chunkid
  60                 return (nextChunkIndex->chunk_start - aChunkIndexPtr->chunk_start);
  61         }
  62
  63         return 0;
  64 }