rtxStream.h

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00001 /*
00002  * Copyright (c) 2003-2014 Objective Systems, Inc.
00003  *
00004  * This software is furnished under a license and may be used and copied
00005  * only in accordance with the terms of such license and with the
00006  * inclusion of the above copyright notice. This software or any other
00007  * copies thereof may not be provided or otherwise made available to any
00008  * other person. No title to and ownership of the software is hereby
00009  * transferred.
00010  *
00011  * The information in this software is subject to change without notice
00012  * and should not be construed as a commitment by Objective Systems, Inc.
00013  *
00014  * PROPRIETARY NOTICE
00015  *
00016  * This software is an unpublished work subject to a confidentiality agreement
00017  * and is protected by copyright and trade secret law.  Unauthorized copying,
00018  * redistribution or other use of this work is prohibited.
00019  *
00020  * The above notice of copyright on this source code product does not indicate
00021  * any actual or intended publication of such source code.
00022  *
00023  *****************************************************************************/
00028 #ifndef _RTXSTREAM_H_
00029 #define _RTXSTREAM_H_
00030 
00031 #ifndef _NO_STREAM
00032 
00033 #include "rtxsrc/rtxContext.h"
00034 #include "rtxsrc/rtxMemBuf.h"
00035 
00036 #ifdef __cplusplus
00037 extern "C" {
00038 #endif
00039 
00059 struct OSRTSTREAM;
00060 
00066 typedef long (*OSRTStreamReadProc)
00067    (struct OSRTSTREAM* pStream, OSOCTET* pbuffer, size_t bufSize);
00068 
00074 typedef long (*OSRTStreamBlockingReadProc)
00075    (struct OSRTSTREAM* pStream, OSOCTET* pbuffer, size_t toReadBytes);
00076 
00082 typedef long (*OSRTStreamWriteProc)(struct OSRTSTREAM* pStream,
00083                                    const OSOCTET* data, size_t numocts);
00084 
00090 typedef int (*OSRTStreamFlushProc)(struct OSRTSTREAM* pStream);
00091 
00097 typedef int (*OSRTStreamCloseProc)(struct OSRTSTREAM* pStream);
00098 
00104 typedef int (*OSRTStreamSkipProc)
00105    (struct OSRTSTREAM* pStream, size_t skipBytes);
00106 
00112 typedef int (*OSRTStreamMarkProc)
00113    (struct OSRTSTREAM* pStream, size_t readAheadLimit);
00114 
00120 typedef int (*OSRTStreamResetProc) (struct OSRTSTREAM* pStream);
00121 
00127 typedef int (*OSRTStreamGetPosProc)
00128    (struct OSRTSTREAM* pStream, size_t* ppos);
00129 
00135 typedef int (*OSRTStreamSetPosProc)
00136    (struct OSRTSTREAM* pStream, size_t pos);
00137 
00138 #define OSRTSTRMF_INPUT      0x0001
00139 #define OSRTSTRMF_OUTPUT     0x0002
00140 #define OSRTSTRMF_BUFFERED   0x8000 /* direct-buffer stream    */
00141 #define OSRTSTRMF_UNBUFFERED 0x4000 /* force unbuffered stream */
00142 #define OSRTSTRMF_POSMARKED  0x2000 /* stream has marked position */
00143 #define OSRTSTRMF_FIXINMEM   0x1000 /* disable flushing */
00144 
00145 #define OSRTSTRMF_BUF_INPUT    (OSRTSTRMF_INPUT|OSRTSTRMF_BUFFERED)
00146 #define OSRTSTRMF_BUF_OUTPUT   (OSRTSTRMF_OUTPUT|OSRTSTRMF_BUFFERED)
00147 
00148 
00149 #define OSRTSTRMID_FILE      1
00150 #define OSRTSTRMID_SOCKET    2
00151 #define OSRTSTRMID_MEMORY    3
00152 #define OSRTSTRMID_BUFFERED  4
00153 #define OSRTSTRMID_DIRECTBUF 5
00154 #define OSRTSTRMID_CTXTBUF   6
00155 #define OSRTSTRMID_ZLIB      7
00156 #define OSRTSTRMID_USER   1000
00157 
00158 #define OSRTSTRM_K_BUFSIZE 1024
00159 
00160 #define OSRTSTRM_K_INVALIDMARK ((size_t)-1)
00161 
00162 #define OSRTSTREAM_BYTEINDEX(pctxt) \
00163 (((pctxt)->pStream->id == OSRTSTRMID_DIRECTBUF) ?                    \
00164  ((pctxt)->pStream->bytesProcessed + (pctxt)->buffer.byteIndex) :    \
00165  ((pctxt)->pStream->bytesProcessed /* was ioBytes */ ))
00166 
00167 #define OSRTSTREAM_ID(pctxt) ((pctxt)->pStream->id)
00168 #define OSRTSTREAM_FLAGS(pctxt) ((pctxt)->pStream->flags)
00169 
00175 typedef struct OSRTSTREAM {
00176    OSRTStreamReadProc  read;     
00177    OSRTStreamBlockingReadProc
00178       blockingRead;      
00179    OSRTStreamWriteProc write;   
00180    OSRTStreamFlushProc flush;   
00181    OSRTStreamCloseProc close;   
00182    OSRTStreamSkipProc  skip;    
00183    OSRTStreamMarkProc  mark;    
00184    OSRTStreamResetProc reset;   
00185    OSRTStreamGetPosProc getPos; 
00186    OSRTStreamSetPosProc setPos; 
00188    void*  extra;                
00189    size_t bufsize;              
00191    size_t readAheadLimit;       
00193    size_t bytesProcessed;       
00195    size_t markedBytesProcessed; 
00197    size_t ioBytes;              
00199    size_t nextMarkOffset;       
00201    size_t segsize;              
00202    OSUINT32 id;                 
00208    OSRTMEMBUF* pCaptureBuf;
00209 
00210    OSUINT16  flags;          
00211 } OSRTSTREAM;
00212 
00222 EXTERNRT int rtxStreamClose (OSCTXT* pctxt);
00223 
00234 EXTERNRT int rtxStreamFlush (OSCTXT* pctxt);
00235 
00245 EXTERNRT int rtxStreamInit (OSCTXT* pctxt);
00246 
00263 EXTERNRT long rtxStreamRead
00264    (OSCTXT* pctxt, OSOCTET* pbuffer, size_t bufSize);
00265 
00282 EXTERNRT long rtxStreamBlockingRead
00283    (OSCTXT* pctxt, OSOCTET* pbuffer, size_t readBytes);
00284 
00296 EXTERNRT int rtxStreamSkip  (OSCTXT* pctxt, size_t skipBytes);
00297 
00310 EXTERNRT long rtxStreamWrite
00311    (OSCTXT* pctxt, const OSOCTET* data, size_t numocts);
00312 
00327 EXTERNRT int rtxStreamGetIOBytes (OSCTXT* pctxt, size_t* pPos);
00328 
00343 EXTERNRT int rtxStreamMark (OSCTXT* pctxt, size_t readAheadLimit);
00344 
00354 EXTERNRT int rtxStreamReset (OSCTXT* pctxt);
00355 
00366 EXTERNRT OSBOOL rtxStreamMarkSupported (OSCTXT* pctxt);
00367 
00376 EXTERNRT OSBOOL rtxStreamIsOpened (OSCTXT* pctxt);
00377 
00386 EXTERNRT OSBOOL rtxStreamIsReadable (OSCTXT* pctxt);
00387 
00396 EXTERNRT OSBOOL rtxStreamIsWritable (OSCTXT* pctxt);
00397 
00407 EXTERNRT int rtxStreamRelease (OSCTXT* pctxt);
00408 
00419 EXTERNRT void rtxStreamSetCapture (OSCTXT* pctxt, OSRTMEMBUF* pmembuf);
00420 
00430 EXTERNRT OSRTMEMBUF* rtxStreamGetCapture (OSCTXT* pctxt);
00431 
00440 EXTERNRT int rtxStreamGetPos (OSCTXT* pctxt, size_t* ppos);
00441 
00450 EXTERNRT int rtxStreamSetPos (OSCTXT* pctxt, size_t pos);
00451 
00454 #ifdef __cplusplus
00455 }
00456 #endif
00457 
00458 #endif /* _NO_STREAM */
00459 #endif /* _RTXSTREAM_H_ */
00460