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/*
* buffer.c
*
* Oliver Fromme <oliver.fromme@heim3.tu-clausthal.de>
* Mon Apr 14 03:53:18 MET DST 1997
*/
#include "mpg123.h"
int outburst
= MAXOUTBURST
;
static int intflag
= FALSE
;
static int usr1flag
= FALSE
;
static void catch_interrupt
(void)
{
intflag
= TRUE
;
}
static void catch_usr1
(void)
{
usr1flag
= TRUE
;
}
#ifndef OS2
void buffer_loop
(struct audio_info_struct
*ai
, sigset_t
*oldsigset
)
{
int bytes
;
int my_fd
= buffermem
->fd
[XF_READER
];
txfermem
*xf
= buffermem
;
int done
= FALSE
;
catchsignal
(SIGINT
, catch_interrupt
);
catchsignal
(SIGUSR1
, catch_usr1
);
sigprocmask
(SIG_SETMASK
, oldsigset
, NULL
);
if (outmode
== DECODE_AUDIO
) {
if (audio_open
(ai
) < 0) {
perror("audio");
exit(1);
}
/* audio_set_rate (ai); already done by audio_open() */
}
for (;;) {
if (intflag
) {
intflag
= FALSE
;
#ifdef SOLARIS
if (outmode
== DECODE_AUDIO
)
audio_queueflush
(ai
);
#endif
xf
->readindex
= xf
->freeindex
;
}
if (usr1flag
) {
usr1flag
= FALSE
;
/* close and re-open in order to flush
* the device's internal buffer before
* changing the sample rate. [OF]
*/
if (outmode
== DECODE_AUDIO
) {
audio_close
(ai
);
memcpy (&ai
->rate
, xf
->metadata
, sizeof(ai
->rate
));
if (audio_open
(ai
) < 0) {
perror("audio");
exit(1);
}
}
}
if (!(bytes
= xfermem_get_usedspace
(xf
))) {
if (done
)
break;
if (xfermem_block
(XF_READER
, xf
) != XF_CMD_WAKEUP
)
done
= TRUE
;
continue;
}
if (bytes
> xf
->size
- xf
->readindex
)
bytes
= xf
->size
- xf
->readindex
;
if (bytes
> outburst
)
bytes
= outburst
;
if (outmode
== DECODE_STDOUT
)
bytes
= write
(1, xf
->data
+ xf
->readindex
, bytes
);
else if (outmode
== DECODE_AUDIO
)
bytes
= audio_play_samples
(ai
,
(unsigned char *) (xf
->data
+ xf
->readindex
), bytes
);
xf
->readindex
= (xf
->readindex
+ bytes
) % xf
->size
;
if (xf
->wakeme
[XF_WRITER
])
xfermem_putcmd
(my_fd
, XF_CMD_WAKEUP
);
}
if (outmode
== DECODE_AUDIO
)
audio_close
(ai
);
}
#endif
/* EOF */