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    SubjectRe: sb16 duplex and quake
    On Tue, 20 Oct 1998, Daniel J. Rodriksson wrote:

    >Found the problem
    >
    >Quake is opening the device for both read and write
    >( maybe a conference amongst the participants was in mind ? )

    This trivial fullduplex proggy that was working fine with my sb-duplex
    patch doesn' t work with your one (and so with 126):

    #include <fcntl.h>
    #include <sys/ioctl.h>
    #include <linux/soundcard.h>

    #define BUFSIZE 1024
    void main(void)
    {
    int format = AFMT_S16_LE;
    /* int speed = 8000;*/
    char buf[BUFSIZE];
    int fds[2];
    int dsp = open("/dev/dsp",O_RDWR);
    if (ioctl(dsp, SNDCTL_DSP_SETFMT, &format)==-1) {
    perror("SNDCTL_DSP_SETFMT\n");
    exit(1);
    }
    /* if (ioctl(dsp, SNDCTL_DSP_SPEED, &speed)==-1) {
    perror("SNDCTL_DSP_SPEED\n");
    exit(1);
    }*/
    pipe(fds);
    if(fork())
    for (;;) {
    read(dsp,buf,BUFSIZE);
    write(fds[1],buf,BUFSIZE);
    }
    else
    for (;;) {
    read(fds[0],buf,BUFSIZE);
    write(dsp,buf,BUFSIZE);
    }
    }

    While it _not_ works I get many:

    Oct 25 19:20:55 dragon kernel: Sound: DMA (input) timed out - IRQ/DRQ config error?

    Andrea Arcangeli



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