src/kits/media/BufferCache.cpp

   1 /*
   2  * Copyright 2009, Axel Dörfler, axeld@pinc-software.de.
   3  * Copyright 2002, Marcus Overhagen. All Rights Reserved.
   4  * Distributed under the terms of the MIT License.
   5  */
   6
   7
   8 //! A cache for BBuffers to be received by BBufferConsumer::BufferReceived().
   9
  10
  11 #include "BufferCache.h"
  12
  13 #include <Buffer.h>
  14
  15 #include "debug.h"
  16
  17
  18 namespace BPrivate {
  19
  20
  21 BufferCache::BufferCache()
  22 {
  23 }
  24
  25
  26 BufferCache::~BufferCache()
  27 {
  28         for (BufferMap::iterator iterator = fMap.begin(); iterator != fMap.end();
  29                         iterator++) {
  30                 delete iterator->second;
  31         }
  32 }
  33
  34
  35 BBuffer*
  36 BufferCache::GetBuffer(media_buffer_id id)
  37 {
  38         if (id <= 0)
  39                 return NULL;
  40
  41         BufferMap::iterator found = fMap.find(id);
  42         if (found != fMap.end())
  43                 return found->second;
  44
  45         buffer_clone_info info;
  46         info.buffer = id;
  47         BBuffer* buffer = new(std::nothrow) BBuffer(info);
  48         if (buffer == NULL || buffer->Data() == NULL) {
  49                 delete buffer;
  50                 return NULL;
  51         }
  52
  53         try {
  54                 fMap.insert(std::make_pair(id, buffer));
  55         } catch (std::bad_alloc& exception) {
  56                 delete buffer;
  57                 return NULL;
  58         }
  59
  60         return buffer;
  61 }
  62
  63
  64 }       // namespace BPrivate