haiku/headers/private/media/DormantNodeManager.h
beveloper 3a4bbc85c1 Start using a class for management and (perhaps later) caching of dormant media nodes
git-svn-id: file:///srv/svn/repos/haiku/trunk/current@721 a95241bf-73f2-0310-859d-f6bbb57e9c96
2002-08-12 20:08:07 +00:00

60 lines
1.4 KiB
C++

/*
* Copyright 2002, Marcus Overhagen. All rights reserved.
* Distributed under the terms of the MIT License.
*/
#ifndef _DORMANT_NODE_MANAGER_H
#define _DORMANT_NODE_MANAGER_H
#include "TMap.h"
namespace BPrivate {
namespace media {
class DormantNodeManager
{
public:
DormantNodeManager();
~DormantNodeManager();
// InstantiateDormantNode(const dormant_node_info & in_info, bool global, media_node * out_node);
// Be careful, GetAddon and PutAddon must be balanced.
BMediaAddOn *GetAddon(media_addon_id id);
void PutAddon(media_addon_id id);
// For use by media_addon_server only
media_addon_id RegisterAddon(const char *path);
void UnregisterAddon(media_addon_id id);
private:
struct loaded_addon_info
{
BMediaAddOn *addon;
image_id image;
int32 usecount;
};
// returns the addon or NULL if it needs to be loaded
BMediaAddOn *TryGetAddon(media_addon_id id);
// manage loading and unloading add-ons from images
status_t LoadAddon(BMediaAddOn **newaddon, image_id *newimage, const char *path, media_addon_id id);
void UnloadAddon(BMediaAddOn *addon, image_id image);
// query the server for the path
status_t FindAddonPath(BPath *path, media_addon_id id);
private:
Map<media_addon_id,loaded_addon_info> *fAddonmap;
BLocker *fLock;
};
}; // namespace media
}; // namespace BPrivate
extern BPrivate::media::DormantNodeManager *_DormantNodeManager;
#endif /* _DORMANT_NODE_MANAGER_H */