参考资料:
"MIDI Systems and Control" Francis Rumsey 1990 Focal Press
"MIDI and Sound Book for the Atari ST" Bernd Enders and Wolfgang Klem 1989 M&T Publishing, Inc.
MIDI file specs and general MIDI specs were also obtained by sending e-mail to LISTSERV@AUVM.AMERICAN.EDU with the phrase GET MIDISPEC PACKAGE in the message.
------------------------------ DEC.CPP ------------------------------------
printf("by Dustin Caldwell (dustin@gse.utah.edu)\n\n");
printf("This is a filter program that reads a binary file\n");
printf("and prints the decimal equivalent of each byte\n");
printf("tab-separated. This is mostly useful when piped \n");
printf("into another file to be edited manually. eg:\n\n");
printf("c:\>dec sonata3.mid > son3.txt\n\n");
printf("This will create a file called son3.txt which can\n");
printf("be edited with any ascii editor. \n\n");
printf("(rec.exe may also be useful, as it reencodes the \n");
printf("ascii text file).\n\n");
printf("Have Fun!!\n");
}
if((rfp=fopen(_argv[1], "r"))==NULL) /* open the read file */
{
printf("cannot open file %s \n",_argv[1]);
helpdoc();
exit(-1);
}
if((wfp=fopen(_argv[2], "wb"))==NULL) /* open the write file */
{
printf("cannot open file %s \n",_argv[1]);
helpdoc();
exit(-1);
}
c=0;
ch=fgetc(rfp);
while(!feof(rfp)) /* loop for whole file */
{
if(isalnum(ch)) /* only 'see' valid ascii chars */
{
c=0;
while(isdigit(ch)) /* only use decimal digits (0-9) */
{
s[c]=ch; /* build a string containing the number */
c++;
ch=fgetc(rfp);
}
s[c]=NULL; /* must have NULL terminator */
fputc(atoi(s), wfp);/* write the binary equivalent to file */
}
ch=fgetc(rfp); /* loop until next number starts */
}
fclose(rfp); /* close up */
fclose(wfp);
}
void helpdoc() /* print help message */
{
printf("\n Text File Encoder\n\n");
printf("by Dustin Caldwell (dustin@gse.utah.edu)\n\n");
printf("This is a program that reads an ascii tab-\n");
printf("delimited file and builds a binary file where\n");
printf("each byte of the binary file is one of the decimal\n");
printf("digits in the text file.\n");
printf(" eg:\n\n");
printf("c:\>rec son3.txt son3.mid\n\n");
printf("(This will create a file called son3.mid which is\n");
printf("a valid binary file)\n\n");
printf("(dec.exe may also be useful, as it decodes binary files)\n\n");
printf("Have Fun!!\n");
}