64 lines
1.3 KiB
C++
64 lines
1.3 KiB
C++
/*
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* Copyright 2009, Axel Dörfler, axeld@pinc-software.de.
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* Distributed under the terms of the MIT License.
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*/
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#ifndef _CHUNK_CACHE_H
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#define _CHUNK_CACHE_H
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#include <Locker.h>
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#include <MediaDefs.h>
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#include <RealtimeAlloc.h>
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#include <queue>
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#include <deque>
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#include "ReaderPlugin.h"
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namespace BPrivate {
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namespace media {
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// Limit to 10 entries, we might want to instead limit to a length of time
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#define CACHE_MAX_ENTRIES 10
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struct chunk_buffer {
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void* buffer;
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size_t size;
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size_t capacity;
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media_header header;
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status_t status;
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};
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typedef std::queue<chunk_buffer*> ChunkQueue;
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typedef std::deque<chunk_buffer*> ChunkList;
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class ChunkCache : public BLocker {
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public:
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ChunkCache(sem_id waitSem, size_t maxBytes);
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~ChunkCache();
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status_t InitCheck() const;
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void MakeEmpty();
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bool SpaceLeft() const;
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chunk_buffer* NextChunk(Reader* reader, void* cookie);
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void RecycleChunk(chunk_buffer* chunk);
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bool ReadNextChunk(Reader* reader, void* cookie);
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private:
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rtm_pool* fRealTimePool;
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sem_id fWaitSem;
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size_t fMaxBytes;
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ChunkQueue fChunkCache;
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ChunkList fUnusedChunks;
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};
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} // namespace media
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} // namespace BPrivate
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using namespace BPrivate::media;
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#endif // _CHUNK_CACHE_H
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