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ULTIMOIO
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ULIDENT.C
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C/C++ Source or Header
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1994-11-17
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7KB
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120 lines
/*************************START OF SPECIFICATIONS *************************/
/* SOURCE FILE NAME: ULIDENT.C */
/* */
/* DESCRIPTIVE NAME: Ultimotion IO Proc routine for MMIOM_IDENTIFYFILE */
/* */
/* COPYRIGHT: IBM - International Business Machines */
/* Copyright (c) IBM Corporation 1991, 1992, 1993 */
/* All Rights Reserved */
/* */
/* STATUS: OS/2 Release 2.0 */
/* */
/* FUNCTION: This source module contains the identify routine. */
/* */
/* NOTES: */
/* DEPENDENCIES: none */
/* RESTRICTIONS: Runs in 32 bit protect mode (OS/2 2.0) */
/* */
/* ENTRY POINTS: */
/* IOProcIdentifyFile */
/* */
/************************* END OF SPECIFICATIONS **************************/
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <memory.h>
#define INCL_DOS /* #define INCL_DOSPROCESS.*/
#define INCL_ERRORS
#define INCL_WIN
#define INCL_GPI
#include <os2.h> /* OS/2 headers. */
#include <pmbitmap.h>
#define INCL_OS2MM
#define INCL_MMIO_CODEC
#define INCL_MMIO_DOSIOPROC
#include <os2me.h> /* Multi-Media IO extensions.*/
#include <ioi.h>
/************************** START OF SPECIFICATIONS *************************/
/* */
/* SUBROUTINE NAME: IOProcIdentifyFile */
/* */
/* DESCRIPTIVE NAME: Identify file type. */
/* */
/* FUNCTION: This function tests if the file is Ultimotion type file. */
/* */
/* NOTES: None */
/* */
/* ENTRY POINT: IOProcIdentifyFile */
/* LINKAGE: CALL FAR (00:32) */
/* */
/* INPUT: */
/* PMMIOINFO pmmioinfo - MMIOINFO structure. (Maybe NULL) */
/* PSZ pszFileName - Pointer to file name. */
/* HMMIO FileHandle - MMIO file handle obtained from mmioOpen. */
/* */
/* EXIT-NORMAL: */
/* MMIO_SUCCESS */
/* */
/* EXIT-ERROR: */
/* MMIO_ERROR */
/* */
/* */
/* SIDE EFFECTS: */
/* */
/*************************** END OF SPECIFICATIONS **************************/
LONG IOProcIdentifyFile ( PMMIOINFO pmmioinfo,
PSZ pszFileName,
HMMIO FileHandle )
{
ULONG rc; /* Return code. */
LONG lFilePosition; /* Temp file position. */
HMMIO WorkHandle; /* Local work handle. */
MMCKINFO mmckinfo;
WorkHandle = FileHandle;
/***************************************************************************/
/* file hasn't been open, must have file name else error returned. */
/***************************************************************************/
if (WorkHandle == (HMMIO)0L){
if (pszFileName == (PSZ) 0L){
return(MMIOERR_INVALID_FILENAME);
} /* end if */
WorkHandle = mmioOpen(pszFileName, NULL,MMIO_NOIDENTIFY);
/***********************************************************************/
/* If open file failed, clean up IOProc instant struct, error returned.*/
/***********************************************************************/
if (WorkHandle == (HMMIO)0L){
return(MMIO_ERROR);
} /* end if */
} /* end if */
/***************************************************************************/
/* if file has been opened, temporary resets file position to beginning */
/* of file. */
/***************************************************************************/
if (WorkHandle != (HMMIO)0L){
lFilePosition = ioSeekFile((PLONG)&rc,WorkHandle,0L);
if (lFilePosition < MMIO_SUCCESS) {
return(MMIO_ERROR);
} /* end if */
} /* end if */
/* Find SMV Riff chunk (This verifies the file is an SMV movie file also */
memset (&mmckinfo, '\0', sizeof(MMCKINFO));
mmckinfo.fccType = mmioStringToFOURCC(UMFORM_MOVIE ,0L);
rc = mmioDescend(WorkHandle,&mmckinfo,NULL,MMIO_FINDRIFF);
return (rc);
}