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141 lines
2.5 KiB
C
141 lines
2.5 KiB
C
#include <config.h>
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/*****************************************************************/
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/*** ***/
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/*** Play out a file on FreeBSD ***/
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/*** (conf/linuxplay.c with changes) ***/
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/*** ***/
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/*****************************************************************/
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#include <useconfig.h>
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#include <stdio.h>
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#include <math.h>
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#include <errno.h>
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#include <ctype.h>
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#include <fcntl.h>
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#include <sys/file.h>
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#include <sys/stat.h>
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#include <sys/param.h>
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#include <sys/signal.h>
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#include <sys/ioctl.h>
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#include <machine/soundcard.h>
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#include "proto.h"
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#include "getargs.h"
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#include "hplay.h"
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#define SAMP_RATE 8000
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long samp_rate = SAMP_RATE;
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/* Audio Parameters */
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static int dev_fd = -1;
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/* file descriptor for audio device */
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char *dev_file = "/dev/dsp";
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static int linear_fd = -1;
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static char *linear_file = NULL;
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char *prog = "hplay";
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static int
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audio_open(void)
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{
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dev_fd = open(dev_file, O_WRONLY | O_NDELAY);
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if (dev_fd < 0)
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{
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perror(dev_file);
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return 0;
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}
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return 1;
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}
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int
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audio_init(int argc, char *argv[])
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{
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int rate_set = 0;
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int use_audio = 1;
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prog = argv[0];
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argc = getargs("freebsd Audio",argc, argv,
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"r", "%d", &rate_set, "Sample rate",
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"a", NULL, &use_audio, "Audio enable",
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NULL);
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if (help_only)
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return argc;
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if (use_audio)
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audio_open();
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if (rate_set)
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samp_rate = rate_set;
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if (dev_fd > 0)
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{
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ioctl(dev_fd, SNDCTL_DSP_SPEED, &samp_rate);
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printf("Actual sound rate: %ld\n", samp_rate);
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}
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return argc;
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}
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void
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audio_term()
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{
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int dummy;
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/* Close audio system */
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if (dev_fd >= 0)
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{
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ioctl(dev_fd, SNDCTL_DSP_SYNC, &dummy);
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close(dev_fd);
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dev_fd = -1;
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}
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/* Finish linear file */
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if (linear_fd >= 0)
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{
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ftruncate(linear_fd, lseek(linear_fd, 0L, SEEK_CUR));
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close(linear_fd);
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linear_fd = -1;
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}
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}
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void
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audio_play(int n, short *data)
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{
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if (n > 0)
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{
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unsigned char *converted = (unsigned char *) malloc(n);
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int i;
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if (converted == NULL)
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{
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fprintf(stderr, "Could not allocate memory for conversion\n");
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exit(3);
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}
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for (i = 0; i < n; i++)
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converted[i] = (data[i] - 32768) / 256;
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if (linear_fd >= 0)
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{
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if (write(linear_fd, converted, n) != n)
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perror("write");
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}
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if (dev_fd >= 0)
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{
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if (write(dev_fd, converted, n) != n)
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perror("write");
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}
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free(converted);
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}
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}
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