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# This script generates the Sound interface for Python.
# It uses the "bgen" package to generate C code.
# It execs the file sndgen.py which contain the function definitions
# (sndgen.py was generated by sndscan.py, scanning the <Sound.h> header file).
from macsupport import *
# define our own function and module generators
class SndMixIn: pass
class SndFunction(SndMixIn, OSErrFunctionGenerator): pass
class SndMethod(SndMixIn, OSErrMethodGenerator): pass
# includestuff etc. are imported from macsupport
includestuff = includestuff + """
#include <Sound.h>
#ifndef HAVE_UNIVERSAL_HEADERS
#define SndCallBackUPP ProcPtr
#define NewSndCallBackProc(x) (x)
#define SndListHandle Handle
#endif
"""
initstuff = initstuff + """
"""
# define types used for arguments (in addition to standard and macsupport types)
class SndChannelPtrType(OpaqueByValueType):
def declare(self, name):
# Initializing all SndChannelPtr objects to 0 saves
# special-casing NewSndChannel(), where it is formally an
# input-output parameter but we treat it as output-only
# (since Python users are not supposed to allocate memory)
Output("SndChannelPtr %s = 0;", name)
SndChannelPtr = SndChannelPtrType('SndChannelPtr', 'SndCh')
SndCommand = OpaqueType('SndCommand', 'SndCmd')
SndCommand_ptr = OpaqueType('SndCommand', 'SndCmd')
SndListHandle = OpaqueByValueType("SndListHandle", "ResObj")
class SndCallBackType(InputOnlyType):
def __init__(self):
Type.__init__(self, 'PyObject*', 'O')
def getargsCheck(self, name):
Output("if (%s != Py_None && !PyCallable_Check(%s))", name, name)
OutLbrace()
Output('PyErr_SetString(PyExc_TypeError, "callback must be callable");')
Output("goto %s__error__;", name)
OutRbrace()
def passInput(self, name):
return "NewSndCallBackProc(SndCh_UserRoutine)"
def cleanup(self, name):
# XXX This knows it is executing inside the SndNewChannel wrapper
Output("if (_res != NULL && %s != Py_None)", name)
OutLbrace()
Output("SndChannelObject *p = (SndChannelObject *)_res;")
Output("p->ob_itself->userInfo = (long)p;")
Output("Py_INCREF(%s);", name)
Output("p->ob_callback = %s;", name)
OutRbrace()
DedentLevel()
Output(" %s__error__: ;", name)
IndentLevel()
SndCallBackProcPtr = SndCallBackType()
SndCompletionProcPtr = FakeType('(SndCompletionProcPtr)0') # XXX
NumVersion = OpaqueByValueType('NumVersion', 'NumVer')
InOutBuf128 = FixedInputOutputBufferType(128)
AudioSelectionPtr = FakeType('0') # XXX
ProcPtr = FakeType('0') # XXX
SCStatus = StructOutputBufferType('SCStatus')
SMStatus = StructOutputBufferType('SMStatus')
includestuff = includestuff + """
#include <OSUtils.h> /* for Set(Current)A5 */
/* Create a SndCommand object (an (int, int, int) tuple) */
static PyObject *
SndCmd_New(SndCommand *pc)
{
return Py_BuildValue("hhl", pc->cmd, pc->param1, pc->param2);
}
/* Convert a SndCommand argument */
static int
SndCmd_Convert(PyObject *v, SndCommand *pc)
{
int len;
pc->param1 = 0;
pc->param2 = 0;
if (PyTuple_Check(v)) {
if (PyArg_ParseTuple(v, "h|hl", &pc->cmd, &pc->param1, &pc->param2))
return 1;
PyErr_Clear();
return PyArg_ParseTuple(v, "hhs#", &pc->cmd, &pc->param1, &pc->param2, &len);
}
return PyArg_Parse(v, "h", &pc->cmd);
}
/* Create a NumVersion object (a quintuple of integers) */
static PyObject *
NumVer_New(NumVersion nv)
{
return Py_BuildValue("iiiii",
nv.majorRev,
#ifdef THINK_C
nv.minorRev,
nv.bugFixRev,
#else
(nv.minorAndBugRev>>4) & 0xf,
nv.minorAndBugRev & 0xf,
#endif
nv.stage,
nv.nonRelRev);
}
static pascal void SndCh_UserRoutine(SndChannelPtr chan, SndCommand *cmd); /* Forward */
"""
finalstuff = finalstuff + """
/* Routine passed to Py_AddPendingCall -- call the Python callback */
static int
SndCh_CallCallBack(arg)
void *arg;
{
SndChannelObject *p = (SndChannelObject *)arg;
PyObject *args;
PyObject *res;
args = Py_BuildValue("(O(hhl))",
p, p->ob_cmd.cmd, p->ob_cmd.param1, p->ob_cmd.param2);
res = PyEval_CallObject(p->ob_callback, args);
Py_DECREF(args);
if (res == NULL)
return -1;
Py_DECREF(res);
return 0;
}
/* Routine passed to NewSndChannel -- schedule a call to SndCh_CallCallBack */
static pascal void
SndCh_UserRoutine(SndChannelPtr chan, SndCommand *cmd)
{
SndChannelObject *p = (SndChannelObject *)(chan->userInfo);
if (p->ob_callback != NULL) {
long A5 = SetA5(p->ob_A5);
p->ob_cmd = *cmd;
Py_AddPendingCall(SndCh_CallCallBack, (void *)p);
SetA5(A5);
}
}
"""
# create the module and object definition and link them
class SndObjectDefinition(ObjectDefinition):
def outputStructMembers(self):
ObjectDefinition.outputStructMembers(self)
Output("/* Members used to implement callbacks: */")
Output("PyObject *ob_callback;")
Output("long ob_A5;");
Output("SndCommand ob_cmd;")
def outputInitStructMembers(self):
ObjectDefinition.outputInitStructMembers(self)
Output("it->ob_callback = NULL;")
Output("it->ob_A5 = SetCurrentA5();");
def outputCleanupStructMembers(self):
ObjectDefinition.outputCleanupStructMembers(self)
Output("Py_XDECREF(self->ob_callback);")
def outputFreeIt(self, itselfname):
Output("SndDisposeChannel(%s, 1);", itselfname)
sndobject = SndObjectDefinition('SndChannel', 'SndCh', 'SndChannelPtr')
module = MacModule('Snd', 'Snd', includestuff, finalstuff, initstuff)
module.addobject(sndobject)
# create lists of functions and object methods
functions = []
sndmethods = []
# populate the lists
execfile('sndgen.py')
# add the functions and methods to the module and object, respectively
for f in functions: module.add(f)
for f in sndmethods: sndobject.add(f)
# generate output
SetOutputFileName('Sndmodule.c')
module.generate()
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