lltexturefetch.h

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#ifndef LL_LLTEXTUREFETCH_H
#define LL_LLTEXTUREFETCH_H

#include "lldir.h"
#include "llimage.h"
#include "lluuid.h"
#include "llworkerthread.h"

class LLViewerImage;
class LLTextureFetchWorker;
class LLTextureCache;
class LLHost;

// Interface class
class LLTextureFetch : public LLWorkerThread
{
        friend class LLTextureFetchWorker;
        
public:
        LLTextureFetch(LLTextureCache* cache, bool threaded);
        ~LLTextureFetch();

        /*virtual*/ S32 update(U32 max_time_ms);        

        bool createRequest(const LLUUID& id, const LLHost& host, F32 priority,
                                           S32 w, S32 h, S32 c, S32 discard, bool needs_aux);
        void deleteRequest(const LLUUID& id, bool cancel);
        bool getRequestFinished(const LLUUID& id, S32& discard_level,
                                                        LLPointer<LLImageRaw>& raw, LLPointer<LLImageRaw>& aux);
        bool updateRequestPriority(const LLUUID& id, F32 priority);

        bool receiveImageHeader(const LLHost& host, const LLUUID& id, U8 codec, U16 packets, U32 totalbytes, U16 data_size, U8* data);
        bool receiveImagePacket(const LLHost& host, const LLUUID& id, U16 packet_num, U16 data_size, U8* data);

        // Debug
        S32 getFetchState(const LLUUID& id, F32& decode_progress_p, F32& requested_priority_p,
                                          U32& fetch_priority_p, F32& fetch_dtime_p, F32& request_dtime_p);
        void dump();
        S32 getNumRequests() { return mRequestMap.size(); }
        
        // Public for access by callbacks
        void lockQueue() { mQueueMutex.lock(); }
        void unlockQueue() { mQueueMutex.unlock(); }
        LLTextureFetchWorker* getWorker(const LLUUID& id);
        
protected:
        void addToNetworkQueue(LLTextureFetchWorker* worker);
        void removeFromNetworkQueue(LLTextureFetchWorker* worker);
        void removeRequest(LLTextureFetchWorker* worker, bool cancel);

private:
        void sendRequestListToSimulators();

public:
        LLUUID mDebugID;
        S32 mDebugCount;
        BOOL mDebugPause;
        S32 mPacketCount;
        S32 mBadPacketCount;
        
private:
        LLMutex mQueueMutex;

        LLTextureCache* mTextureCache;
        
        // Map of all requests by UUID
        typedef std::map<LLUUID,LLTextureFetchWorker*> map_t;
        map_t mRequestMap;

        // Set of requests that require network data
        typedef std::set<LLUUID> queue_t;
        queue_t mNetworkQueue;
        typedef std::map<LLHost,std::set<LLUUID> > cancel_queue_t;
        cancel_queue_t mCancelQueue;

        LLFrameTimer mNetworkTimer;
};

#endif // LL_LLTEXTUREFETCH_H

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