Category : Music and Digitized Voice
Archive : SBF3.ZIP
Filename : DACDMA.C
Output of file : DACDMA.C contained in archive : SBF3.ZIP
#include
#include
#include
#include
#include
#include
#include "sb.h"
extern int optind; /* index of which argument is next */
extern char *optarg; /* pointer to argument of current option */
extern int opterr; /* allow error message */
int getopt(int argc, char *argv[], char *optionS);
void main(int argc, char *argv[])
{
FILE *f;
signed char far *raw, far *aligned;
long sample_len;
unsigned sl, nr, sr=11000;
unsigned long physical, aligned_physical;
int stereo = 0, error = 0;
char ch;
while((ch = getopt(argc,argv,"sr:")) != EOF)
{
switch(ch)
{
case 's':
stereo = 1;
break;
case 'r':
sr = atoi(optarg);
break;
case '?':
error++;
break;
}
}
if(error || optind == argc)
{
puts("Usage: dacdma [-r rate] [-s] sample");
exit(1);
}
if(Sb_Get_Params())
{
puts("BLASTER environment variable not set.");
exit(1);
}
if(Sb_Init())
{
printf("Could not find Soundblaster!\n");
exit(1);
}
printf("Found Soundblaster at address %xh, IRQ %d, DMA %d.\n",
SbIOaddr,SbIRQ,SbDMAchan);
f = fopen(argv[optind],"rb");
if(f == NULL)
{
printf("Could not open sample file %s\n",argv[optind]);
exit(1);
}
sample_len = filelength(fileno(f));
if(sample_len > 64000U)
sl = 64000U;
else
sl = (int)sample_len;
raw = (signed char far *)farmalloc((unsigned long)sl + 65535L);
physical = ((unsigned long)FP_OFF(raw)) + (((unsigned long)FP_SEG(raw)) << 4);
aligned_physical = physical+0x0FFFFL;
aligned_physical &= 0xF0000L;
aligned=MK_FP((unsigned )((aligned_physical >> 4) & 0xFFFF),0);
nr = fread(aligned,1,sl,f);
fclose(f);
Sb_Init_Voice_DMA(NULL); /* Use default interrupt handler */
sr = Sb_Sample_Rate(sr,PLAY);
printf("Sample rate = %u Hz\n",sr);
printf("Output is %s.\n",(stereo) ? "stereo" : "mono");
Sb_Voice(1);
printf("Playing sample\n");
Sb_Voice_DMA(aligned,nr,stereo,PLAY);
while(!kbhit() && !Sb_DMA_Complete())
;
if(!Sb_DMA_Complete())
{
Sb_Halt_DMA();
Sb_Init(); /* Necessary after early termination of a high-speed xfer */
getch();
}
Sb_Voice(0);
printf("Done.\n");
Sb_DeInit_Voice_DMA();
farfree(raw);
exit(0);
}
Very nice! Thank you for this wonderful archive. I wonder why I found it only now. Long live the BBS file archives!
This is so awesome! 😀 I’d be cool if you could download an entire archive of this at once, though.
But one thing that puzzles me is the “mtswslnkmcjklsdlsbdmMICROSOFT” string. There is an article about it here. It is definitely worth a read: http://www.os2museum.com/wp/mtswslnk/