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Date: Sat, 7 Dec 1996 15:14:19 +0000 ()
From: "Lenzi, Sergio" <lenzi@bsi.com.br>
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To: S.Brandenburg@tu-bs.de
cc: Lady Ada <ladyada@xenu.com>, freebsd-questions@FreeBSD.ORG
Subject: Re: O si o [sound question]
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I have the same problem with the .au files. even with some "samples".


I have written 2 programs (record) and (play) that records music or other 
whings from the dsp.

this programs work great...

use record [sample rate] < /dev/dsp > file
--------------------------record program-----------



#include <stdio.h>
#include <sys/file.h>
#include <stdlib.h>
#include <sys/ioctl.h>
#include <signal.h>
#include <time.h>

#include <machine/soundcard.h>

static int tot = 0;
static float k;

#define BUFFSZ	4096

static void closeall(int x)
{
    fprintf(stderr, "End ok total bytes:%d, [%6.2 Kbps]\n", tot,k);
    exit(0);
}

main(int ac, char **av)
{
    int r, h, n, t1, t2;
    char *dev;
    char area[BUFFSZ];

    h = fileno(stdin);
    if (ac < 2)
	r=18000;
    else
        r = atoi(av[1]);
    if (ioctl(h, SOUND_PCM_WRITE_RATE, &r) < 0) {
	perror("set ioctl");
	exit(1);
    }
    if (ioctl(h, SOUND_PCM_READ_RATE, &r) < 0) {
	perror("read ioctl");
	exit(1);
    }
    fprintf(stderr, "dsp rate:%d\n", r);
    signal(SIGINT, closeall);
    t1 = time(NULL);
    fwrite(&r, sizeof(r), 1, stdout);
    while ((n = fread(area, 1, BUFFSZ, stdin)) > 0) {
	tot += n;
	fwrite(area, 1, n, stdout);
	t2 = time(NULL);
	k = t2 - t1;
	if (k == 0)
	    k = 1;
	k *= 1000.0;
	fprintf(stderr, "%6.2f bps\r", (float) tot / k);
    }
    return (0);
}
-----------------------play program use play < file > /dev/dsp-------
#include <stdio.h>
#include <sys/file.h>
#include <stdlib.h>
#include <sys/ioctl.h>
#include <signal.h>
#include <time.h>

#include <machine/soundcard.h>
#define BUFFSZ 8192

static int tot = 0;
static float k=0;

static void closeall(int x)
{
    fprintf(stderr, "End ok total bytes:%d [%6.2f Kbps]\n", tot,k);
    exit(0);
}

main(int ac, char **av)
{
    int r, h, n, k, t1, t2;
    char *dev;
    char area[BUFFSZ];

    h = fileno(stdout);
    fread(&r, sizeof(r), 1, stdin);
    if (ioctl(h, SOUND_PCM_WRITE_RATE, &r) < 0) {
	perror("set ioctl");
	exit(1);
    }
    if (ioctl(h, SOUND_PCM_READ_RATE, &r) < 0) {
	perror("read ioctl");
	exit(1);
    }
    fprintf(stderr, "dsp rate:%d\n", r);
    signal(SIGINT, closeall);
    t1 = time(NULL);
    while ((n = fread(area, 1, BUFFSZ, stdin))) {
	tot += n;
	fwrite(area, 1, n, stdout);
	fflush(stdout);
	t2 = time(NULL);
	k = t2 - t1;
	if (k == 0)
	    k = 1;
	k *= 1000;
	fprintf(stderr, "%.8d [%6.2f]\r", tot, (float)tot / k);
    }
    fprintf(stderr, "End ok total bytes:%d\n", tot);
    return (0);
}



Sergio Lenzi.

Unix consult.