Merge CV, ver=5.1; ops/methods from HV, and interface from CV where possible

[goodguy/history.git] / cinelerra-5.1 / cinelerra / cachebase.h

diff --git a/cinelerra-5.1/cinelerra/cachebase.h b/cinelerra-5.1/cinelerra/cachebase.h
new file mode 100644 (file)
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+++ b/cinelerra-5.1/cinelerra/cachebase.h
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+
+/*
+ * CINELERRA
+ * Copyright (C) 2008 Adam Williams <broadcast at earthling dot net>
+ * 
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ * 
+ */
+
+#ifndef CACHEBASE_H
+#define CACHEBASE_H
+
+
+#include "asset.inc"
+#include "linklist.h"
+#include "mutex.inc"
+#include <stdint.h>
+
+// Store rendered elements from files but not the files.
+// Drawing caches must be separate from file caches to avoid
+// delaying other file accesses for the drawing routines.
+
+
+class CacheItemBase : public ListItem<CacheItemBase>
+{
+public:
+       CacheItemBase();
+       virtual ~CacheItemBase();
+
+       virtual int get_size();
+
+// source_id - supplied by user if the cache is not part of a file.
+// Used for fast accesses.
+       int source_id;
+// path is needed since the item may need to be deleted based on file.
+// Used for deletion.
+       char *path;
+// Number of last get or put operation involving this object.
+       int age;
+// Starting point of item in asset's native rate.
+       int64_t position;
+};
+
+
+
+class CacheBase : public List<CacheItemBase>
+{
+public:
+       CacheBase();
+       virtual ~CacheBase();
+
+       void age_cache(int64_t max_items);
+       int get_age();
+       int cache_items() { return total_items; }
+       void remove_all();
+
+// Insert item in list in ascending position order.
+       void put_item(CacheItemBase *item);
+// Get first item from list with matching position or 0 if none found.
+       CacheItemBase* get_item(int64_t position);
+// Delete item.
+       void del_item(CacheItemBase *item);
+       int delete_item(CacheItemBase *item);
+// Remove all items with the asset id.
+       void remove_asset(Asset *asset);
+// Called when done with the item returned by get_.
+// Ignore if item was 0.
+       void unlock();
+// delete oldest member, returns 1 if item deleted or 0 if none found
+       int delete_oldest();
+// Calculate current size of cache in bytes
+       int64_t get_memory_usage();
+
+       int total_items;
+       Mutex *lock;
+// Current position of search
+       CacheItemBase *current_item;
+};
+
+
+
+#endif