cpython/Modules/cdmodule.c

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/**********************************************************
Copyright 1991-1995 by Stichting Mathematisch Centrum, Amsterdam,
The Netherlands.
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All Rights Reserved
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Permission to use, copy, modify, and distribute this software and its
documentation for any purpose and without fee is hereby granted,
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provided that the above copyright notice appear in all copies and that
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both that copyright notice and this permission notice appear in
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supporting documentation, and that the names of Stichting Mathematisch
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Centrum or CWI or Corporation for National Research Initiatives or
CNRI not be used in advertising or publicity pertaining to
distribution of the software without specific, written prior
permission.
While CWI is the initial source for this software, a modified version
is made available by the Corporation for National Research Initiatives
(CNRI) at the Internet address ftp://ftp.python.org.
STICHTING MATHEMATISCH CENTRUM AND CNRI DISCLAIM ALL WARRANTIES WITH
REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH
CENTRUM OR CNRI BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL
DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
PERFORMANCE OF THIS SOFTWARE.
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******************************************************************/
/* CD module -- interface to Mark Callow's and Roger Chickering's */
/* CD Audio Library (CD). */
#include <sys/types.h>
#include <cdaudio.h>
/* #include <sigfpe.h> */
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#include "allobjects.h"
#include "import.h"
#include "modsupport.h"
#include "ceval.h"
#define NCALLBACKS 8
typedef struct {
OB_HEAD
CDPLAYER *ob_cdplayer;
} cdplayerobject;
static object *CdError; /* exception cd.error */
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static object *
CD_allowremoval(self, args)
cdplayerobject *self;
object *args;
{
if (!newgetargs(args, ""))
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return NULL;
CDallowremoval(self->ob_cdplayer);
INCREF(None);
return None;
}
static object *
CD_preventremoval(self, args)
cdplayerobject *self;
object *args;
{
if (!newgetargs(args, ""))
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return NULL;
CDpreventremoval(self->ob_cdplayer);
INCREF(None);
return None;
}
static object *
CD_bestreadsize(self, args)
cdplayerobject *self;
object *args;
{
if (!newgetargs(args, ""))
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return NULL;
return newintobject((long) CDbestreadsize(self->ob_cdplayer));
}
static object *
CD_close(self, args)
cdplayerobject *self;
object *args;
{
if (!newgetargs(args, ""))
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return NULL;
if (!CDclose(self->ob_cdplayer)) {
err_errno(CdError); /* XXX - ??? */
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return NULL;
}
self->ob_cdplayer = NULL;
INCREF(None);
return None;
}
static object *
CD_eject(self, args)
cdplayerobject *self;
object *args;
{
CDSTATUS status;
if (!newgetargs(args, ""))
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return NULL;
if (!CDeject(self->ob_cdplayer)) {
if (CDgetstatus(self->ob_cdplayer, &status) &&
status.state == CD_NODISC)
err_setstr(CdError, "no disc in player");
else
err_setstr(CdError, "eject failed");
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return NULL;
}
INCREF(None);
return None;
}
static object *
CD_getstatus(self, args)
cdplayerobject *self;
object *args;
{
CDSTATUS status;
if (!newgetargs(args, ""))
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return NULL;
if (!CDgetstatus(self->ob_cdplayer, &status)) {
err_errno(CdError); /* XXX - ??? */
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return NULL;
}
return mkvalue("(ii(iii)(iii)(iii)iiii)", status.state,
status.track, status.min, status.sec, status.frame,
status.abs_min, status.abs_sec, status.abs_frame,
status.total_min, status.total_sec, status.total_frame,
status.first, status.last, status.scsi_audio,
status.cur_block);
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}
static object *
CD_gettrackinfo(self, args)
cdplayerobject *self;
object *args;
{
int track;
CDTRACKINFO info;
CDSTATUS status;
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if (!newgetargs(args, "i", &track))
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return NULL;
if (!CDgettrackinfo(self->ob_cdplayer, track, &info)) {
if (CDgetstatus(self->ob_cdplayer, &status) &&
status.state == CD_NODISC)
err_setstr(CdError, "no disc in player");
else
err_setstr(CdError, "gettrackinfo failed");
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return NULL;
}
return mkvalue("((iii)(iii))",
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info.start_min, info.start_sec, info.start_frame,
info.total_min, info.total_sec, info.total_frame);
}
static object *
CD_msftoblock(self, args)
cdplayerobject *self;
object *args;
{
int min, sec, frame;
if (!newgetargs(args, "iii", &min, &sec, &frame))
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return NULL;
return newintobject((long) CDmsftoblock(self->ob_cdplayer,
min, sec, frame));
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}
static object *
CD_play(self, args)
cdplayerobject *self;
object *args;
{
int start, play;
CDSTATUS status;
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if (!newgetargs(args, "ii", &start, &play))
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return NULL;
if (!CDplay(self->ob_cdplayer, start, play)) {
if (CDgetstatus(self->ob_cdplayer, &status) &&
status.state == CD_NODISC)
err_setstr(CdError, "no disc in player");
else
err_setstr(CdError, "play failed");
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return NULL;
}
INCREF(None);
return None;
}
static object *
CD_playabs(self, args)
cdplayerobject *self;
object *args;
{
int min, sec, frame, play;
CDSTATUS status;
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if (!newgetargs(args, "iiii", &min, &sec, &frame, &play))
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return NULL;
if (!CDplayabs(self->ob_cdplayer, min, sec, frame, play)) {
if (CDgetstatus(self->ob_cdplayer, &status) &&
status.state == CD_NODISC)
err_setstr(CdError, "no disc in player");
else
err_setstr(CdError, "playabs failed");
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return NULL;
}
INCREF(None);
return None;
}
static object *
CD_playtrack(self, args)
cdplayerobject *self;
object *args;
{
int start, play;
CDSTATUS status;
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if (!newgetargs(args, "ii", &start, &play))
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return NULL;
if (!CDplaytrack(self->ob_cdplayer, start, play)) {
if (CDgetstatus(self->ob_cdplayer, &status) &&
status.state == CD_NODISC)
err_setstr(CdError, "no disc in player");
else
err_setstr(CdError, "playtrack failed");
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return NULL;
}
INCREF(None);
return None;
}
static object *
CD_playtrackabs(self, args)
cdplayerobject *self;
object *args;
{
int track, min, sec, frame, play;
CDSTATUS status;
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if (!newgetargs(args, "iiiii", &track, &min, &sec, &frame, &play))
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return NULL;
if (!CDplaytrackabs(self->ob_cdplayer, track, min, sec, frame, play)) {
if (CDgetstatus(self->ob_cdplayer, &status) &&
status.state == CD_NODISC)
err_setstr(CdError, "no disc in player");
else
err_setstr(CdError, "playtrackabs failed");
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return NULL;
}
INCREF(None);
return None;
}
static object *
CD_readda(self, args)
cdplayerobject *self;
object *args;
{
int numframes, n;
object *result;
if (!newgetargs(args, "i", &numframes))
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return NULL;
result = newsizedstringobject(NULL, numframes * sizeof(CDFRAME));
if (result == NULL)
return NULL;
n = CDreadda(self->ob_cdplayer, (CDFRAME *) getstringvalue(result), numframes);
if (n == -1) {
DECREF(result);
err_errno(CdError);
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return NULL;
}
if (n < numframes)
if (resizestring(&result, n * sizeof(CDFRAME)))
return NULL;
return result;
}
static object *
CD_seek(self, args)
cdplayerobject *self;
object *args;
{
int min, sec, frame;
long block;
if (!newgetargs(args, "iii", &min, &sec, &frame))
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return NULL;
block = CDseek(self->ob_cdplayer, min, sec, frame);
if (block == -1) {
err_errno(CdError);
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return NULL;
}
return newintobject(block);
}
static object *
CD_seektrack(self, args)
cdplayerobject *self;
object *args;
{
int track;
long block;
if (!newgetargs(args, "i", &track))
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return NULL;
block = CDseektrack(self->ob_cdplayer, track);
if (block == -1) {
err_errno(CdError);
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return NULL;
}
return newintobject(block);
}
static object *
CD_seekblock(self, args)
cdplayerobject *self;
object *args;
{
unsigned long block;
if (!newgetargs(args, "l", &block))
return NULL;
block = CDseekblock(self->ob_cdplayer, block);
if (block == (unsigned long) -1) {
err_errno(CdError);
return NULL;
}
return newintobject(block);
}
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static object *
CD_stop(self, args)
cdplayerobject *self;
object *args;
{
CDSTATUS status;
if (!newgetargs(args, ""))
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return NULL;
if (!CDstop(self->ob_cdplayer)) {
if (CDgetstatus(self->ob_cdplayer, &status) &&
status.state == CD_NODISC)
err_setstr(CdError, "no disc in player");
else
err_setstr(CdError, "stop failed");
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return NULL;
}
INCREF(None);
return None;
}
static object *
CD_togglepause(self, args)
cdplayerobject *self;
object *args;
{
CDSTATUS status;
if (!newgetargs(args, ""))
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return NULL;
if (!CDtogglepause(self->ob_cdplayer)) {
if (CDgetstatus(self->ob_cdplayer, &status) &&
status.state == CD_NODISC)
err_setstr(CdError, "no disc in player");
else
err_setstr(CdError, "togglepause failed");
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return NULL;
}
INCREF(None);
return None;
}
static struct methodlist cdplayer_methods[] = {
{"allowremoval", (method)CD_allowremoval, 1},
{"bestreadsize", (method)CD_bestreadsize, 1},
{"close", (method)CD_close, 1},
{"eject", (method)CD_eject, 1},
{"getstatus", (method)CD_getstatus, 1},
{"gettrackinfo", (method)CD_gettrackinfo, 1},
{"msftoblock", (method)CD_msftoblock, 1},
{"play", (method)CD_play, 1},
{"playabs", (method)CD_playabs, 1},
{"playtrack", (method)CD_playtrack, 1},
{"playtrackabs", (method)CD_playtrackabs, 1},
{"preventremoval", (method)CD_preventremoval, 1},
{"readda", (method)CD_readda, 1},
{"seek", (method)CD_seek, 1},
{"seekblock", (method)CD_seekblock, 1},
{"seektrack", (method)CD_seektrack, 1},
{"stop", (method)CD_stop, 1},
{"togglepause", (method)CD_togglepause, 1},
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{NULL, NULL} /* sentinel */
};
static void
cdplayer_dealloc(self)
cdplayerobject *self;
{
if (self->ob_cdplayer != NULL)
CDclose(self->ob_cdplayer);
DEL(self);
}
static object *
cdplayer_getattr(self, name)
cdplayerobject *self;
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char *name;
{
if (self->ob_cdplayer == NULL) {
err_setstr(RuntimeError, "no player active");
return NULL;
}
return findmethod(cdplayer_methods, (object *)self, name);
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}
typeobject CdPlayertype = {
OB_HEAD_INIT(&Typetype)
0, /*ob_size*/
"cdplayer", /*tp_name*/
sizeof(cdplayerobject), /*tp_size*/
0, /*tp_itemsize*/
/* methods */
(destructor)cdplayer_dealloc, /*tp_dealloc*/
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0, /*tp_print*/
(getattrfunc)cdplayer_getattr, /*tp_getattr*/
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0, /*tp_setattr*/
0, /*tp_compare*/
0, /*tp_repr*/
};
static object *
newcdplayerobject(cdp)
CDPLAYER *cdp;
{
cdplayerobject *p;
p = NEWOBJ(cdplayerobject, &CdPlayertype);
if (p == NULL)
return NULL;
p->ob_cdplayer = cdp;
return (object *) p;
}
static object *
CD_open(self, args)
object *self, *args;
{
char *dev, *direction;
CDPLAYER *cdp;
/*
* Variable number of args.
* First defaults to "None", second defaults to "r".
*/
dev = NULL;
direction = "r";
if (!newgetargs(args, "|zs", &dev, &direction))
return NULL;
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cdp = CDopen(dev, direction);
if (cdp == NULL) {
err_errno(CdError);
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return NULL;
}
return newcdplayerobject(cdp);
}
typedef struct {
OB_HEAD
CDPARSER *ob_cdparser;
struct {
object *ob_cdcallback;
object *ob_cdcallbackarg;
} ob_cdcallbacks[NCALLBACKS];
} cdparserobject;
static void
CD_callback(arg, type, data)
void *arg;
CDDATATYPES type;
void *data;
{
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object *result, *args, *v = NULL;
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char *p;
int i;
cdparserobject *self;
self = (cdparserobject *) arg;
args = newtupleobject(3);
if (args == NULL)
return;
INCREF(self->ob_cdcallbacks[type].ob_cdcallbackarg);
settupleitem(args, 0, self->ob_cdcallbacks[type].ob_cdcallbackarg);
settupleitem(args, 1, newintobject((long) type));
switch (type) {
case cd_audio:
v = newsizedstringobject(data, CDDA_DATASIZE);
break;
case cd_pnum:
case cd_index:
v = newintobject(((CDPROGNUM *) data)->value);
break;
case cd_ptime:
case cd_atime:
#define ptr ((struct cdtimecode *) data)
v = mkvalue("(iii)",
ptr->mhi * 10 + ptr->mlo,
ptr->shi * 10 + ptr->slo,
ptr->fhi * 10 + ptr->flo);
#undef ptr
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break;
case cd_catalog:
v = newsizedstringobject(NULL, 13);
p = getstringvalue(v);
for (i = 0; i < 13; i++)
*p++ = ((char *) data)[i] + '0';
break;
case cd_ident:
#define ptr ((struct cdident *) data)
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v = newsizedstringobject(NULL, 12);
p = getstringvalue(v);
CDsbtoa(p, ptr->country, 2);
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p += 2;
CDsbtoa(p, ptr->owner, 3);
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p += 3;
*p++ = ptr->year[0] + '0';
*p++ = ptr->year[1] + '0';
*p++ = ptr->serial[0] + '0';
*p++ = ptr->serial[1] + '0';
*p++ = ptr->serial[2] + '0';
*p++ = ptr->serial[3] + '0';
*p++ = ptr->serial[4] + '0';
#undef ptr
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break;
case cd_control:
v = newintobject((long) *((unchar *) data));
break;
}
settupleitem(args, 2, v);
if (err_occurred()) {
DECREF(args);
return;
}
result = call_object(self->ob_cdcallbacks[type].ob_cdcallback, args);
DECREF(args);
XDECREF(result);
}
static object *
CD_deleteparser(self, args)
cdparserobject *self;
object *args;
{
int i;
if (!newgetargs(args, ""))
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return NULL;
CDdeleteparser(self->ob_cdparser);
self->ob_cdparser = NULL;
/* no sense in keeping the callbacks, so remove them */
for (i = 0; i < NCALLBACKS; i++) {
XDECREF(self->ob_cdcallbacks[i].ob_cdcallback);
self->ob_cdcallbacks[i].ob_cdcallback = NULL;
XDECREF(self->ob_cdcallbacks[i].ob_cdcallbackarg);
self->ob_cdcallbacks[i].ob_cdcallbackarg = NULL;
}
INCREF(None);
return None;
}
static object *
CD_parseframe(self, args)
cdparserobject *self;
object *args;
{
char *cdfp;
int length;
CDFRAME *p;
if (!newgetargs(args, "s#", &cdfp, &length))
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return NULL;
if (length % sizeof(CDFRAME) != 0) {
err_setstr(TypeError, "bad length");
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return NULL;
}
p = (CDFRAME *) cdfp;
while (length > 0) {
CDparseframe(self->ob_cdparser, p);
length -= sizeof(CDFRAME);
p++;
if (err_occurred())
return NULL;
}
INCREF(None);
return None;
}
static object *
CD_removecallback(self, args)
cdparserobject *self;
object *args;
{
int type;
if (!newgetargs(args, "i", &type))
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return NULL;
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if (type < 0 || type >= NCALLBACKS) {
err_setstr(TypeError, "bad type");
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return NULL;
}
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CDremovecallback(self->ob_cdparser, (CDDATATYPES) type);
XDECREF(self->ob_cdcallbacks[type].ob_cdcallback);
self->ob_cdcallbacks[type].ob_cdcallback = NULL;
XDECREF(self->ob_cdcallbacks[type].ob_cdcallbackarg);
self->ob_cdcallbacks[type].ob_cdcallbackarg = NULL;
INCREF(None);
return None;
}
static object *
CD_resetparser(self, args)
cdparserobject *self;
object *args;
{
if (!newgetargs(args, ""))
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return NULL;
CDresetparser(self->ob_cdparser);
INCREF(None);
return None;
}
static object *
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CD_addcallback(self, args)
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cdparserobject *self;
object *args;
{
int type;
object *func, *funcarg;
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/* XXX - more work here */
if (!newgetargs(args, "iOO", &type, &func, &funcarg))
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return NULL;
if (type < 0 || type >= NCALLBACKS) {
err_setstr(TypeError, "argument out of range");
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return NULL;
}
#ifdef CDsetcallback
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CDaddcallback(self->ob_cdparser, (CDDATATYPES) type, CD_callback, (void *) self);
#else
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CDsetcallback(self->ob_cdparser, (CDDATATYPES) type, CD_callback, (void *) self);
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#endif
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XDECREF(self->ob_cdcallbacks[type].ob_cdcallback);
INCREF(func);
self->ob_cdcallbacks[type].ob_cdcallback = func;
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XDECREF(self->ob_cdcallbacks[type].ob_cdcallbackarg);
INCREF(funcarg);
self->ob_cdcallbacks[type].ob_cdcallbackarg = funcarg;
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/*
if (type == cd_audio) {
sigfpe_[_UNDERFL].repls = _ZERO;
handle_sigfpes(_ON, _EN_UNDERFL, NULL, _ABORT_ON_ERROR, NULL);
}
*/
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INCREF(None);
return None;
}
static struct methodlist cdparser_methods[] = {
{"addcallback", (method)CD_addcallback, 1},
{"deleteparser", (method)CD_deleteparser, 1},
{"parseframe", (method)CD_parseframe, 1},
{"removecallback", (method)CD_removecallback, 1},
{"resetparser", (method)CD_resetparser, 1},
{"setcallback", (method)CD_addcallback, 1}, /* backward compatibility */
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{NULL, NULL} /* sentinel */
};
static void
cdparser_dealloc(self)
cdparserobject *self;
{
int i;
for (i = 0; i < NCALLBACKS; i++) {
XDECREF(self->ob_cdcallbacks[i].ob_cdcallback);
self->ob_cdcallbacks[i].ob_cdcallback = NULL;
XDECREF(self->ob_cdcallbacks[i].ob_cdcallbackarg);
self->ob_cdcallbacks[i].ob_cdcallbackarg = NULL;
}
CDdeleteparser(self->ob_cdparser);
DEL(self);
}
static object *
cdparser_getattr(self, name)
cdparserobject *self;
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char *name;
{
if (self->ob_cdparser == NULL) {
err_setstr(RuntimeError, "no parser active");
return NULL;
}
return findmethod(cdparser_methods, (object *)self, name);
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}
typeobject CdParsertype = {
OB_HEAD_INIT(&Typetype)
0, /*ob_size*/
"cdparser", /*tp_name*/
sizeof(cdparserobject), /*tp_size*/
0, /*tp_itemsize*/
/* methods */
(destructor)cdparser_dealloc, /*tp_dealloc*/
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0, /*tp_print*/
(getattrfunc)cdparser_getattr, /*tp_getattr*/
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0, /*tp_setattr*/
0, /*tp_compare*/
0, /*tp_repr*/
};
static object *
newcdparserobject(cdp)
CDPARSER *cdp;
{
cdparserobject *p;
int i;
p = NEWOBJ(cdparserobject, &CdParsertype);
if (p == NULL)
return NULL;
p->ob_cdparser = cdp;
for (i = 0; i < NCALLBACKS; i++) {
p->ob_cdcallbacks[i].ob_cdcallback = NULL;
p->ob_cdcallbacks[i].ob_cdcallbackarg = NULL;
}
return (object *) p;
}
static object *
CD_createparser(self, args)
object *self, *args;
{
CDPARSER *cdp;
if (!newgetargs(args, ""))
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return NULL;
cdp = CDcreateparser();
if (cdp == NULL) {
err_setstr(CdError, "createparser failed");
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return NULL;
}
return newcdparserobject(cdp);
}
static object *
CD_msftoframe(self, args)
object *self, *args;
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{
int min, sec, frame;
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if (!newgetargs(args, "iii", &min, &sec, &frame))
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return NULL;
return newintobject((long) CDmsftoframe(min, sec, frame));
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}
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static struct methodlist CD_methods[] = {
{"open", (method)CD_open, 1},
{"createparser", (method)CD_createparser, 1},
{"msftoframe", (method)CD_msftoframe, 1},
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{NULL, NULL} /* Sentinel */
};
void
initcd()
{
object *m, *d;
m = initmodule("cd", CD_methods);
d = getmoduledict(m);
CdError = newstringobject("cd.error");
dictinsert(d, "error", CdError);
/* Identifiers for the different types of callbacks from the parser */
dictinsert(d, "audio", newintobject((long) cd_audio));
dictinsert(d, "pnum", newintobject((long) cd_pnum));
dictinsert(d, "index", newintobject((long) cd_index));
dictinsert(d, "ptime", newintobject((long) cd_ptime));
dictinsert(d, "atime", newintobject((long) cd_atime));
dictinsert(d, "catalog", newintobject((long) cd_catalog));
dictinsert(d, "ident", newintobject((long) cd_ident));
dictinsert(d, "control", newintobject((long) cd_control));
/* Block size information for digital audio data */
dictinsert(d, "DATASIZE", newintobject((long) CDDA_DATASIZE));
dictinsert(d, "BLOCKSIZE", newintobject((long) CDDA_BLOCKSIZE));
/* Possible states for the cd player */
dictinsert(d, "ERROR", newintobject((long) CD_ERROR));
dictinsert(d, "NODISC", newintobject((long) CD_NODISC));
dictinsert(d, "READY", newintobject((long) CD_READY));
dictinsert(d, "PLAYING", newintobject((long) CD_PLAYING));
dictinsert(d, "PAUSED", newintobject((long) CD_PAUSED));
dictinsert(d, "STILL", newintobject((long) CD_STILL));
#ifdef CD_CDROM /* only newer versions of the library */
dictinsert(d, "CDROM", newintobject((long) CD_CDROM));
#endif
if (err_occurred())
fatal("can't initialize module cd");
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}