mirror of
https://github.com/ptitSeb/Serious-Engine
synced 2024-11-27 04:35:52 +01:00
116 lines
3.7 KiB
C++
116 lines
3.7 KiB
C++
/* Copyright (c) 2002-2012 Croteam Ltd.
|
|
This program is free software; you can redistribute it and/or modify
|
|
it under the terms of version 2 of the GNU General Public License as published by
|
|
the Free Software Foundation
|
|
|
|
|
|
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.,
|
|
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */
|
|
|
|
#ifndef SE_INCL_BUFFER_H
|
|
#define SE_INCL_BUFFER_H
|
|
#ifdef PRAGMA_ONCE
|
|
#pragma once
|
|
#endif
|
|
|
|
#include <Engine/Base/Timer.h>
|
|
|
|
/*
|
|
* Class for buffering data streams at byte level.
|
|
*/
|
|
class CBuffer {
|
|
public:
|
|
SLONG bu_slAllocationStep; // how many bytes to add when buffer overflows
|
|
SLONG bu_slWriteOffset; // where to write to next
|
|
SLONG bu_slReadOffset; // where to read from next
|
|
|
|
SLONG bu_slFree; // number of bytes free
|
|
SLONG bu_slSize; // current buffer size
|
|
UBYTE *bu_pubBuffer; // buffer memory
|
|
|
|
// default constructor
|
|
CBuffer(void);
|
|
// destructor
|
|
~CBuffer(void);
|
|
// free buffer
|
|
void Clear(void);
|
|
// expand buffer to be given number of bytes in size
|
|
void Expand(SLONG slNewSize);
|
|
// set how many bytes to add when buffer overflows
|
|
void SetAllocationStep(SLONG slStep);
|
|
// read bytes from buffer
|
|
SLONG ReadBytes(void *pv, SLONG slSize);
|
|
// skip bytes from buffer (read without actually reading)
|
|
SLONG SkipBytes(SLONG slSize);
|
|
// read bytes from buffer to stream
|
|
SLONG ReadBytesToStream(CTStream &strm, SLONG slSize);
|
|
// unread bytes from buffer
|
|
void UnreadBytes(SLONG slSize);
|
|
// check how many bytes are there to read
|
|
SLONG QueryReadBytes(void);
|
|
// write bytes to buffer
|
|
void WriteBytes(const void *pv, SLONG slSize);
|
|
// move all data from another buffer to this one
|
|
void MoveBuffer(CBuffer &buFrom);
|
|
};
|
|
|
|
// data for limiting bandwidth/lantency and calculating statistics in block-buffers
|
|
class CBlockBufferStats {
|
|
public:
|
|
FLOAT bbs_fLatencyLimit; // minimum latency in seconds
|
|
FLOAT bbs_fLatencyVariation;// additional latency variation
|
|
FLOAT bbs_fBandwidthLimit; // maximum bandwidth in bps (bits per second)
|
|
CTimerValue bbs_tvTimeUsed; // next point in time free for data receiving
|
|
|
|
void Clear(void);
|
|
// get time when block of given size will be finished if started now
|
|
CTimerValue GetBlockFinalTime(SLONG slSize);
|
|
};
|
|
|
|
/*
|
|
* Class for buffering data streams at block level.
|
|
*/
|
|
class CBlockBuffer : public CBuffer {
|
|
public:
|
|
CBlockBufferStats *bb_pbbsStats; // for bandwidth/latency stats and limits
|
|
SLONG bb_slBlockSizeRead; // block size left for reading (0 if not inside block)
|
|
SLONG bb_slBlockSizeWrite; // block size left for writing (0 if not inside block)
|
|
|
|
// default constructor
|
|
CBlockBuffer(void);
|
|
// destructor
|
|
~CBlockBuffer(void);
|
|
// free buffer
|
|
void Clear(void);
|
|
|
|
// read one block if possible
|
|
BOOL ReadBlock(void *pv, SLONG &slSize);
|
|
// read one block from buffer to stream
|
|
BOOL ReadBlockToStream(CTStream &strm);
|
|
// write one block
|
|
void WriteBlock(const void *pv, SLONG slSize);
|
|
// unread one block
|
|
void UnreadBlock(SLONG slSize);
|
|
|
|
// read raw block data
|
|
SLONG ReadRawBlock(void *pv, SLONG slSize);
|
|
// write raw block data
|
|
void WriteRawBlock(const void *pv, SLONG slSize);
|
|
// unread raw block data
|
|
void UnreadRawBlock(SLONG slSize);
|
|
// move all data from another buffer to this one
|
|
void MoveBlockBuffer(CBlockBuffer &buFrom);
|
|
// peek sizes of next block
|
|
void PeekBlockSize(SLONG &slExpectedSize, SLONG &slReceivedSoFar);
|
|
};
|
|
|
|
|
|
#endif /* include-once check. */
|
|
|