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/**
* @file lltexturefetch.h
* @brief Object for managing texture fetches.
*
* $LicenseInfo:firstyear=2000&license=viewerlgpl$
* Second Life Viewer Source Code
* Copyright (C) 2010, Linden Research, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation;
* version 2.1 of the License only.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
* $/LicenseInfo$
*/
#ifndef LL_LLTEXTUREFETCH_H
#define LL_LLTEXTUREFETCH_H
#include "lldir.h"
#include "llimage.h"
#include "lluuid.h"
#include "llworkerthread.h"
#include "llcurl.h"
#include "lltextureinfo.h"
#include "llapr.h"
class LLViewerTexture;
class LLTextureFetchWorker;
class HTTPGetResponder;
class LLTextureCache;
class LLImageDecodeThread;
class LLHost;
class LLViewerAssetStats;
// Interface class
class LLTextureFetch : public LLWorkerThread
{
friend class LLTextureFetchWorker;
friend class HTTPGetResponder;
public:
LLTextureFetch(LLTextureCache* cache, LLImageDecodeThread* imagedecodethread, bool threaded, bool qa_mode);
~LLTextureFetch();
class TFRequest;
/*virtual*/ S32 update(F32 max_time_ms);
void shutDownTextureCacheThread() ; //called in the main thread after the TextureCacheThread shuts down.
void shutDownImageDecodeThread() ; //called in the main thread after the ImageDecodeThread shuts down.
bool createRequest(const std::string& url, const LLUUID& id, const LLHost& host, F32 priority,
S32 w, S32 h, S32 c, S32 discard, bool needs_aux, bool can_use_http);
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);
void setTextureBandwidth(F32 bandwidth) { mTextureBandwidth = bandwidth; }
F32 getTextureBandwidth() { return mTextureBandwidth; }
// Debug
BOOL isFromLocalCache(const LLUUID& id);
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, bool& can_use_http);
void dump();
S32 getNumRequests() ;
S32 getNumHTTPRequests() ;
U32 getTotalNumHTTPRequests() ;
// Public for access by callbacks
S32 getPending();
void lockQueue() { mQueueMutex.lock(); }
void unlockQueue() { mQueueMutex.unlock(); }
LLTextureFetchWorker* getWorker(const LLUUID& id);
LLTextureFetchWorker* getWorkerAfterLock(const LLUUID& id);
LLTextureInfo* getTextureInfo() { return &mTextureInfo; }
// Commands available to other threads to control metrics gathering operations.
void commandSetRegion(U64 region_handle);
void commandSendMetrics(const std::string & caps_url,
const LLUUID & session_id,
const LLUUID & agent_id,
LLViewerAssetStats * main_stats);
void commandDataBreak();
LLCurlRequest & getCurlRequest() { return *mCurlGetRequest; }
bool isQAMode() const { return mQAMode; }
// Curl POST counter maintenance
inline void incrCurlPOSTCount() { mCurlPOSTRequestCount++; }
inline void decrCurlPOSTCount() { mCurlPOSTRequestCount--; }
protected:
void addToNetworkQueue(LLTextureFetchWorker* worker);
void removeFromNetworkQueue(LLTextureFetchWorker* worker, bool cancel);
void addToHTTPQueue(const LLUUID& id);
void removeFromHTTPQueue(const LLUUID& id, S32 received_size = 0);
void removeRequest(LLTextureFetchWorker* worker, bool cancel);
// Overrides from the LLThread tree
bool runCondition();
private:
void sendRequestListToSimulators();
/*virtual*/ void startThread(void);
/*virtual*/ void endThread(void);
/*virtual*/ void threadedUpdate(void);
void commonUpdate();
// Metrics command helpers
/**
* Enqueues a command request at the end of the command queue
* and wakes up the thread as needed.
*
* Takes ownership of the TFRequest object.
*
* Method locks the command queue.
*/
void cmdEnqueue(TFRequest *);
/**
* Returns the first TFRequest object in the command queue or
* NULL if none is present.
*
* Caller acquires ownership of the object and must dispose of it.
*
* Method locks the command queue.
*/
TFRequest * cmdDequeue();
/**
* Processes the first command in the queue disposing of the
* request on completion. Successive calls are needed to perform
* additional commands.
*
* Method locks the command queue.
*/
void cmdDoWork();
public:
LLUUID mDebugID;
S32 mDebugCount;
BOOL mDebugPause;
S32 mPacketCount;
S32 mBadPacketCount;
private:
LLMutex mQueueMutex; //to protect mRequestMap and mCommands only
LLMutex mNetworkQueueMutex; //to protect mNetworkQueue, mHTTPTextureQueue and mCancelQueue.
static LLStat sCacheHitRate;
static LLStat sCacheReadLatency;
LLTextureCache* mTextureCache;
LLImageDecodeThread* mImageDecodeThread;
LLCurlRequest* mCurlGetRequest;
// 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;
queue_t mHTTPTextureQueue;
typedef std::map<LLHost,std::set<LLUUID> > cancel_queue_t;
cancel_queue_t mCancelQueue;
F32 mTextureBandwidth;
F32 mMaxBandwidth;
LLTextureInfo mTextureInfo;
U32 mHTTPTextureBits;
//debug use
U32 mTotalHTTPRequests ;
// Out-of-band cross-thread command queue. This command queue
// is logically tied to LLQueuedThread's list of
// QueuedRequest instances and so must be covered by the
// same locks.
typedef std::vector<TFRequest *> command_queue_t;
command_queue_t mCommands;
// If true, modifies some behaviors that help with QA tasks.
const bool mQAMode;
// Count of POST requests outstanding. We maintain the count
// indirectly in the CURL request responder's ctor and dtor and
// use it when determining whether or not to sleep the thread. Can't
// use the LLCurl module's request counter as it isn't thread compatible.
// *NOTE: Don't mix Atomic and static, apr_initialize must be called first.
LLAtomic32<S32> mCurlPOSTRequestCount;
public:
// A probabilistically-correct indicator that the current
// attempt to log metrics follows a break in the metrics stream
// reporting due to either startup or a problem POSTing data.
static volatile bool svMetricsDataBreak;
};
#endif // LL_LLTEXTUREFETCH_H
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