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Support user routines (callbacks) on sound channels.

This commit is contained in:
Guido van Rossum 1994-09-16 12:48:59 +00:00
parent bc0ba01001
commit df1c4ee503
1 changed files with 74 additions and 6 deletions
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80
Mac/Modules/macosmodule.c
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@ -30,6 +30,7 @@ OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
#include <string.h>
#include <errno.h>
#include <OSUtils.h> /* for Set(Current)A5 */
#include <Resources.h>
#include <Sound.h>
@ -232,6 +233,8 @@ SndCh_Dealloc(SndChObject *s)
{
if (s->chan != NULL) {
SndDisposeChannel(s->chan, 1);
if (s->chan->userInfo != 0)
DEL((void *)s->chan->userInfo);
s->chan = NULL;
}
PyMem_DEL(s);
@ -247,6 +250,8 @@ SndCh_Close(SndChObject *s, PyObject *args)
}
if (s->chan != NULL) {
SndDisposeChannel(s->chan, quietNow);
if (s->chan->userInfo != 0)
DEL((void *)s->chan->userInfo);
s->chan = NULL;
}
Py_INCREF(Py_None);
@ -336,23 +341,85 @@ static PyTypeObject SndChType = {
/*----------------------------------------------------------------------*/
/* Module */
typedef struct {
long A5;
PyObject *callback;
PyObject *channel;
SndCommand cmd;
} cbinfo;
static int
MySafeCallback(arg)
void *arg;
{
cbinfo *p = (cbinfo *)arg;
PyObject *args;
PyObject *res;
args = Py_BuildValue("(O(hhl))",
p->channel,
p->cmd.cmd, p->cmd.param1, p->cmd.param2);
res = PyEval_CallObject(p->callback, args);
Py_DECREF(args);
if (res == NULL)
return -1;
DECREF(res);
return 0;
}
static pascal void
MyUserRoutine(SndChannelPtr chan, SndCommand cmd)
{
cbinfo *p = (cbinfo *)chan->userInfo;
long A5 = SetA5(p->A5);
p->cmd = cmd;
Py_AddPendingCall(MySafeCallback, (void *)p);
SetA5(A5);
}
static PyObject *
MacOS_SndNewChannel(PyObject *self, PyObject *args)
{
SndChannelPtr chan;
short synth;
long init = 0;
PyObject *callback = NULL;
cbinfo *p = NULL;
SndCallBackProcPtr userroutine = 0;
OSErr err;
PyObject *res;
if (!PyArg_Parse(args, "(h)", &synth)) {
PyErr_Clear();
if (!PyArg_Parse(args, "(hl)", &synth, &init))
return NULL;
if (!PyArg_Parse(args, "(hl)", &synth, &init)) {
PyErr_Clear();
if (!PyArg_Parse(args, "(hlO)",
&synth, &init, &callback))
return NULL;
}
}
if (callback != NULL) {
p = NEW(cbinfo, 1);
if (p == NULL)
return PyErr_NoMemory();
p->A5 = SetCurrentA5();
p->callback = callback;
userroutine = MyUserRoutine;
}
chan = NULL;
err = SndNewChannel(&chan, synth, init, (SndCallBackProcPtr)NULL);
if (err)
err = SndNewChannel(&chan, synth, init, userroutine);
if (err) {
if (p)
DEL(p);
return Err(err);
return (PyObject *)SndCh_FromSndChannelPtr(chan);
}
chan->userInfo = (long)p;
res = (PyObject *)SndCh_FromSndChannelPtr(chan);
if (res == NULL) {
SndDisposeChannel(chan, 1);
DEL(p);
}
else
p->channel = res;
return res;
}
static PyObject *
@ -400,6 +467,7 @@ MacOS_Init()
/* Initialize MacOS.Error exception */
MacOS_Error = PyString_FromString("MacOS.Error");
if (MacOS_Error == NULL || PyDict_SetItemString(d, "Error", MacOS_Error) != 0)
if (MacOS_Error == NULL ||
PyDict_SetItemString(d, "Error", MacOS_Error) != 0)
Py_FatalError("can't define MacOS.Error");
}