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|
*** dacio-linux.c.orig Wed Sep 3 14:57:59 1997
--- dacio-linux.c Wed Sep 3 14:50:20 1997
***************
*** 3,9 ****
--- 3,13 ----
#include <fcntl.h> /*O_WRONLY*/
#include <sys/ioctl.h> /*(ioctl)*/
#include <unistd.h> /*(write)*/
+ #if defined(LINUX)
#include <sys/soundcard.h> /*SNDCTL_XXX*/
+ #else
+ #include <machine/soundcard.h>
+ #endif
#include <errno.h> /*EINTR*/
#include "defs.h" /*u8,u16*/
#include "dacio.h" /*(dacioXXX)*/
***************
*** 47,53 ****
static struct {
union {
u8 *p8;
! u16 *p16;
} p;
u8 *top;
u8 *bot;
--- 51,57 ----
static struct {
union {
u8 *p8;
! i15 *p16;
} p;
u8 *top;
u8 *bot;
***************
*** 67,77 ****
exit(1);
}
#endif
! tmp = AFMT_U8;
if (ioctl(fd, SNDCTL_DSP_SETFMT, &tmp) < 0) {
perror("dacioConf");
exit(1);
}
/*fprintf(stderr, "fmt = 0x%x\n", tmp);*/
if (ioctl(fd, SNDCTL_DSP_STEREO, &dcp->stereo) < 0) {
--- 71,109 ----
exit(1);
}
#endif
! switch (dcp->bits) {
! case 0:
! case 8:
! dcp->bits = 8;
! tmp = AFMT_U8; break;
! case 16:
! tmp = AFMT_S16_LE; break;
! default:
! fprintf(stderr, "Don't know how to handle %d bit output.\n", dcp->bits);
! exit(1);
! break;
! }
!
if (ioctl(fd, SNDCTL_DSP_SETFMT, &tmp) < 0) {
perror("dacioConf");
exit(1);
}
+
+ switch (tmp) {
+ case AFMT_U8:
+ if (dcp->bits != 8) {
+ fprintf(stderr, "soundcard doesn't support 8bits.\n");
+ exit(1);
+ }
+ break;
+ case AFMT_S16_LE:
+ if (dcp->bits != 16) {
+ fprintf(stderr, "soundcard doesn't support 16bits.\n");
+ exit(1);
+ }
+ break;
+ }
+
/*fprintf(stderr, "fmt = 0x%x\n", tmp);*/
if (ioctl(fd, SNDCTL_DSP_STEREO, &dcp->stereo) < 0) {
***************
*** 90,99 ****
perror("dacioConf");
exit(1);
}
! /*fprintf(stderr, "buffer size = 0x%x\n", buf.size);*/
dci = *dcp;
/*if (buf.top != NULL) free(buf.top);*/
! buf.top = memPerm(buf.size * sizeof(u8));
buf.p.p8 = buf.top;
buf.bot = buf.top + buf.size;
}
--- 122,136 ----
perror("dacioConf");
exit(1);
}
! fprintf(stderr, "sound buffer size = 0x%x\n", buf.size);
! tmp = buf.size;
! while (tmp <= (0.1 * (dcp->speed * (dcp->stereo+1) * (dcp->bits/8))))
! tmp += buf.size;
! buf.size = tmp;
! fprintf(stderr, "buffer size = 0x%x\n", buf.size);
dci = *dcp;
/*if (buf.top != NULL) free(buf.top);*/
! buf.top = memPerm(buf.size);
buf.p.p8 = buf.top;
buf.bot = buf.top + buf.size;
}
***************
*** 115,121 ****
int s;
if (buf.p.p8 <= buf.top) return;
! for ( ; buf.p.p8 < buf.bot; buf.p.p8++) *buf.p.p8 = 128;
RETRY:
s = write(fd, buf.top, buf.size);
if (s < buf.size) {
--- 152,165 ----
int s;
if (buf.p.p8 <= buf.top) return;
! switch (dci.bits) {
! case 8:
! for ( ; buf.p.p8 < buf.bot; buf.p.p8++) *buf.p.p8 = 128;
! break;
! case 16:
! for ( ; buf.p.p8 < buf.bot; buf.p.p16++) *buf.p.p16 = 0;
! break;
! }
RETRY:
s = write(fd, buf.top, buf.size);
if (s < buf.size) {
***************
*** 179,184 ****
--- 223,230 ----
(tmpvar & ~255)? ~tmpvar >> 16 : tmpvar ) /* 16 will be OK */
/* ~(tmpvar >> 16) makes longer asm */
#endif
+ #define to16bit(x) \
+ (((x) * gv) >> 12)
/* stereo */
static void
***************
*** 186,199 ****
{
const i31 *inbufp = inbuf.p;
u8 *u8p = buf.p.p8;
! for (; n > 0; n--) {
! i31x tmp;
! *u8p++ = to8bit(*inbufp++, tmp); /* L */
! *u8p++ = to8bit(*inbufp++, tmp); /* R */
}
inbuf.p = inbufp;
- buf.p.p8 = u8p;
}
/* mono */
--- 232,257 ----
{
const i31 *inbufp = inbuf.p;
u8 *u8p = buf.p.p8;
+ i15 *s15p = buf.p.p16;
! switch (dci.bits) {
! case 8:
! for (; n > 0; n--) {
! i31x tmp;
! *u8p++ = to8bit(*inbufp++, tmp); /* L */
! *u8p++ = to8bit(*inbufp++, tmp); /* R */
! }
! buf.p.p8 = u8p;
! break;
! case 16:
! for (; n > 0; n--) {
! *s15p++ = to16bit(*inbufp++); /* L */
! *s15p++ = to16bit(*inbufp++); /* R */
! }
! buf.p.p16 = s15p;
! break;
}
inbuf.p = inbufp;
}
/* mono */
***************
*** 202,220 ****
{
const i31 *inbufp = inbuf.p;
u8 *u8p = buf.p.p8;
! for (; n > 0; n--) {
! i31x tmp;
! *u8p++ = to8bit(*inbufp, tmp);
! inbufp += 2;
}
inbuf.p = inbufp;
- buf.p.p8 = u8p;
}
#define dacioOutHirev(x) \
if (dci.stereo) dacioOutHirevS(x); else dacioOutHirevM(x)
! #define bufRest() (dci.stereo? (buf.bot - buf.p.p8)/2 : buf.bot - buf.p.p8)
void
dacioOut(void)
--- 260,290 ----
{
const i31 *inbufp = inbuf.p;
u8 *u8p = buf.p.p8;
+ i15 *s16p = buf.p.p16;
! switch (dci.bits) {
! case 8:
! for (; n > 0; n--) {
! i31x tmp;
! *u8p++ = to8bit(*inbufp, tmp);
! inbufp += 2;
! }
! buf.p.p8 = u8p;
! break;
! case 16:
! for (; n > 0; n--) {
! *s16p++ = to16bit(*inbufp);
! inbufp += 2;
! }
! buf.p.p16 = s16p;
! break;
}
inbuf.p = inbufp;
}
#define dacioOutHirev(x) \
if (dci.stereo) dacioOutHirevS(x); else dacioOutHirevM(x)
! #define bufRest() ((dci.stereo? (buf.bot - buf.p.p8)/2 : buf.bot - buf.p.p8)/(dci.bits/8))
void
dacioOut(void)
|
