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3239 lines (2912 loc) · 79.1 KB
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#define OLD_INTERFACE /* define for pre-Irix 6 interface */
#include "Python.h"
#include "stringobject.h"
#include <audio.h>
#include <stdarg.h>
#ifndef AL_NO_ELEM
#ifndef OLD_INTERFACE
#define OLD_INTERFACE
#endif /* OLD_INTERFACE */
#endif /* AL_NO_ELEM */
static PyObject *ErrorObject;
/* ----------------------------------------------------- */
/* Declarations for objects of type port */
typedef struct {
PyObject_HEAD
/* XXXX Add your own stuff here */
ALport port;
} alpobject;
staticforward PyTypeObject Alptype;
/* ---------------------------------------------------------------- */
/* Declarations for objects of type config */
typedef struct {
PyObject_HEAD
/* XXXX Add your own stuff here */
ALconfig config;
} alcobject;
staticforward PyTypeObject Alctype;
static void
ErrorHandler(long code, const char *fmt, ...)
{
va_list args;
char buf[128];
va_start(args, fmt);
vsprintf(buf, fmt, args);
va_end(args);
PyErr_SetString(ErrorObject, buf);
}
#ifdef AL_NO_ELEM /* IRIX 6 */
static PyObject *
param2python(int resource, int param, ALvalue value, ALparamInfo *pinfo)
{
ALparamInfo info;
PyObject *v;
if (pinfo == NULL) {
pinfo = &info;
if (alGetParamInfo(resource, param, &info) < 0)
return NULL;
}
switch (pinfo->elementType) {
case AL_PTR_ELEM:
/* XXXX don't know how to handle this */
case AL_NO_ELEM:
Py_INCREF(Py_None);
return Py_None;
case AL_INT32_ELEM:
case AL_RESOURCE_ELEM:
case AL_ENUM_ELEM:
return PyInt_FromLong((long) value.i);
case AL_INT64_ELEM:
return PyLong_FromLongLong(value.ll);
case AL_FIXED_ELEM:
return PyFloat_FromDouble(alFixedToDouble(value.ll));
case AL_CHAR_ELEM:
if (value.ptr == NULL) {
Py_INCREF(Py_None);
return Py_None;
}
return PyString_FromString((char *) value.ptr);
default:
PyErr_SetString(ErrorObject, "unknown element type");
return NULL;
}
}
static int
python2elem(PyObject *item, void *ptr, int elementType)
{
switch (elementType) {
case AL_INT32_ELEM:
case AL_RESOURCE_ELEM:
case AL_ENUM_ELEM:
if (!PyInt_Check(item)) {
PyErr_BadArgument();
return -1;
}
*((int *) ptr) = PyInt_AsLong(item);
break;
case AL_INT64_ELEM:
if (PyInt_Check(item))
*((long long *) ptr) = PyInt_AsLong(item);
else if (PyLong_Check(item))
*((long long *) ptr) = PyLong_AsLongLong(item);
else {
PyErr_BadArgument();
return -1;
}
break;
case AL_FIXED_ELEM:
if (PyInt_Check(item))
*((long long *) ptr) = alDoubleToFixed((double) PyInt_AsLong(item));
else if (PyFloat_Check(item))
*((long long *) ptr) = alDoubleToFixed(PyFloat_AsDouble(item));
else {
PyErr_BadArgument();
return -1;
}
break;
default:
PyErr_SetString(ErrorObject, "unknown element type");
return -1;
}
return 0;
}
static int
python2param(int resource, ALpv *param, PyObject *value, ALparamInfo *pinfo)
{
ALparamInfo info;
int i, stepsize;
PyObject *item;
if (pinfo == NULL) {
pinfo = &info;
if (alGetParamInfo(resource, param->param, &info) < 0)
return -1;
}
switch (pinfo->valueType) {
case AL_STRING_VAL:
if (pinfo->elementType != AL_CHAR_ELEM) {
PyErr_SetString(ErrorObject, "unknown element type");
return -1;
}
if (!PyString_Check(value)) {
PyErr_BadArgument();
return -1;
}
param->value.ptr = PyString_AS_STRING(value);
param->sizeIn = PyString_GET_SIZE(value)+1; /*account for NUL*/
break;
case AL_SET_VAL:
case AL_VECTOR_VAL:
if (!PyList_Check(value) && !PyTuple_Check(value)) {
PyErr_BadArgument();
return -1;
}
switch (pinfo->elementType) {
case AL_INT32_ELEM:
case AL_RESOURCE_ELEM:
case AL_ENUM_ELEM:
param->sizeIn = PySequence_Size(value);
param->value.ptr = PyMem_NEW(int, param->sizeIn);
stepsize = sizeof(int);
break;
case AL_INT64_ELEM:
case AL_FIXED_ELEM:
param->sizeIn = PySequence_Size(value);
param->value.ptr = PyMem_NEW(long long, param->sizeIn);
stepsize = sizeof(long long);
break;
}
for (i = 0; i < param->sizeIn; i++) {
item = PySequence_GetItem(value, i);
if (python2elem(item, (void *) ((char *) param->value.ptr + i*stepsize), pinfo->elementType) < 0) {
PyMem_DEL(param->value.ptr);
return -1;
}
}
break;
case AL_SCALAR_VAL:
switch (pinfo->elementType) {
case AL_INT32_ELEM:
case AL_RESOURCE_ELEM:
case AL_ENUM_ELEM:
return python2elem(value, (void *) ¶m->value.i,
pinfo->elementType);
case AL_INT64_ELEM:
case AL_FIXED_ELEM:
return python2elem(value, (void *) ¶m->value.ll,
pinfo->elementType);
default:
PyErr_SetString(ErrorObject, "unknown element type");
return -1;
}
}
return 0;
}
static int
python2params(int resource1, int resource2, PyObject *list, ALpv **pvsp, ALparamInfo **pinfop)
{
PyObject *item;
ALpv *pvs;
ALparamInfo *pinfo;
int npvs, i;
npvs = PyList_Size(list);
pvs = PyMem_NEW(ALpv, npvs);
pinfo = PyMem_NEW(ALparamInfo, npvs);
for (i = 0; i < npvs; i++) {
item = PyList_GetItem(list, i);
if (!PyArg_ParseTuple(item, "iO", &pvs[i].param, &item))
goto error;
if (alGetParamInfo(resource1, pvs[i].param, &pinfo[i]) < 0 &&
alGetParamInfo(resource2, pvs[i].param, &pinfo[i]) < 0)
goto error;
if (python2param(resource1, &pvs[i], item, &pinfo[i]) < 0)
goto error;
}
*pvsp = pvs;
*pinfop = pinfo;
return npvs;
error:
/* XXXX we should clean up everything */
if (pvs)
PyMem_DEL(pvs);
if (pinfo)
PyMem_DEL(pinfo);
return -1;
}
/* -------------------------------------------------------- */
static PyObject *
SetConfig(alcobject *self, PyObject *args, int (*func)(ALconfig, int))
{
int par;
if (!PyArg_ParseTuple(args, "i:SetConfig", &par))
return NULL;
if ((*func)(self->config, par) == -1)
return NULL;
Py_INCREF(Py_None);
return Py_None;
}
static PyObject *
GetConfig(alcobject *self, PyObject *args, int (*func)(ALconfig))
{
int par;
if (!PyArg_ParseTuple(args, ":GetConfig"))
return NULL;
if ((par = (*func)(self->config)) == -1)
return NULL;
return PyInt_FromLong((long) par);
}
static char alc_SetWidth__doc__[] =
"alSetWidth: set the wordsize for integer audio data."
;
static PyObject *
alc_SetWidth(alcobject *self, PyObject *args)
{
return SetConfig(self, args, alSetWidth);
}
static char alc_GetWidth__doc__[] =
"alGetWidth: get the wordsize for integer audio data."
;
static PyObject *
alc_GetWidth(alcobject *self, PyObject *args)
{
return GetConfig(self, args, alGetWidth);
}
static char alc_SetSampFmt__doc__[] =
"alSetSampFmt: set the sample format setting in an audio ALconfig structure."
;
static PyObject *
alc_SetSampFmt(alcobject *self, PyObject *args)
{
return SetConfig(self, args, alSetSampFmt);
}
static char alc_GetSampFmt__doc__[] =
"alGetSampFmt: get the sample format setting in an audio ALconfig structure."
;
static PyObject *
alc_GetSampFmt(alcobject *self, PyObject *args)
{
return GetConfig(self, args, alGetSampFmt);
}
static char alc_SetChannels__doc__[] =
"alSetChannels: set the channel settings in an audio ALconfig."
;
static PyObject *
alc_SetChannels(alcobject *self, PyObject *args)
{
return SetConfig(self, args, alSetChannels);
}
static char alc_GetChannels__doc__[] =
"alGetChannels: get the channel settings in an audio ALconfig."
;
static PyObject *
alc_GetChannels(alcobject *self, PyObject *args)
{
return GetConfig(self, args, alGetChannels);
}
static char alc_SetFloatMax__doc__[] =
"alSetFloatMax: set the maximum value of floating point sample data."
;
static PyObject *
alc_SetFloatMax(alcobject *self, PyObject *args)
{
double maximum_value;
if (!PyArg_ParseTuple(args, "d:SetFloatMax", &maximum_value))
return NULL;
if (alSetFloatMax(self->config, maximum_value) < 0)
return NULL;
Py_INCREF(Py_None);
return Py_None;
}
static char alc_GetFloatMax__doc__[] =
"alGetFloatMax: get the maximum value of floating point sample data."
;
static PyObject *
alc_GetFloatMax(alcobject *self, PyObject *args)
{
double maximum_value;
if (!PyArg_ParseTuple(args, ":GetFloatMax"))
return NULL;
if ((maximum_value = alGetFloatMax(self->config)) == 0)
return NULL;
return PyFloat_FromDouble(maximum_value);
}
static char alc_SetDevice__doc__[] =
"alSetDevice: set the device setting in an audio ALconfig structure."
;
static PyObject *
alc_SetDevice(alcobject *self, PyObject *args)
{
return SetConfig(self, args, alSetDevice);
}
static char alc_GetDevice__doc__[] =
"alGetDevice: get the device setting in an audio ALconfig structure."
;
static PyObject *
alc_GetDevice(alcobject *self, PyObject *args)
{
return GetConfig(self, args, alGetDevice);
}
static char alc_SetQueueSize__doc__[] =
"alSetQueueSize: set audio port buffer size."
;
static PyObject *
alc_SetQueueSize(alcobject *self, PyObject *args)
{
return SetConfig(self, args, alSetQueueSize);
}
static char alc_GetQueueSize__doc__[] =
"alGetQueueSize: get audio port buffer size."
;
static PyObject *
alc_GetQueueSize(alcobject *self, PyObject *args)
{
return GetConfig(self, args, alGetQueueSize);
}
#endif /* AL_NO_ELEM */
static PyObject *
setconfig(alcobject *self, PyObject *args, int (*func)(ALconfig, long))
{
long par;
if (!PyArg_ParseTuple(args, "l:SetConfig", &par))
return NULL;
if ((*func)(self->config, par) == -1)
return NULL;
Py_INCREF(Py_None);
return Py_None;
}
static PyObject *
getconfig(alcobject *self, PyObject *args, long (*func)(ALconfig))
{
long par;
if (!PyArg_ParseTuple(args, ":GetConfig"))
return NULL;
if ((par = (*func)(self->config)) == -1)
return NULL;
return PyInt_FromLong((long) par);
}
static PyObject *
alc_setqueuesize (alcobject *self, PyObject *args)
{
return setconfig(self, args, ALsetqueuesize);
}
static PyObject *
alc_getqueuesize (alcobject *self, PyObject *args)
{
return getconfig(self, args, ALgetqueuesize);
}
static PyObject *
alc_setwidth (alcobject *self, PyObject *args)
{
return setconfig(self, args, ALsetwidth);
}
static PyObject *
alc_getwidth (alcobject *self, PyObject *args)
{
return getconfig(self, args, ALgetwidth);
}
static PyObject *
alc_getchannels (alcobject *self, PyObject *args)
{
return getconfig(self, args, ALgetchannels);
}
static PyObject *
alc_setchannels (alcobject *self, PyObject *args)
{
return setconfig(self, args, ALsetchannels);
}
#ifdef AL_405
static PyObject *
alc_getsampfmt (alcobject *self, PyObject *args)
{
return getconfig(self, args, ALgetsampfmt);
}
static PyObject *
alc_setsampfmt (alcobject *self, PyObject *args)
{
return setconfig(self, args, ALsetsampfmt);
}
static PyObject *
alc_getfloatmax(alcobject *self, PyObject *args)
{
double arg;
if (!PyArg_ParseTuple(args, ":GetFloatMax"))
return 0;
if ((arg = ALgetfloatmax(self->config)) == 0)
return NULL;
return PyFloat_FromDouble(arg);
}
static PyObject *
alc_setfloatmax(alcobject *self, PyObject *args)
{
double arg;
if (!PyArg_ParseTuple(args, "d:SetFloatMax", &arg))
return 0;
if (ALsetfloatmax(self->config, arg) == -1)
return NULL;
Py_INCREF(Py_None);
return Py_None;
}
#endif /* AL_405 */
static struct PyMethodDef alc_methods[] = {
#ifdef AL_NO_ELEM /* IRIX 6 */
{"SetWidth", (PyCFunction)alc_SetWidth, METH_VARARGS, alc_SetWidth__doc__},
{"GetWidth", (PyCFunction)alc_GetWidth, METH_VARARGS, alc_GetWidth__doc__},
{"SetSampFmt", (PyCFunction)alc_SetSampFmt, METH_VARARGS, alc_SetSampFmt__doc__},
{"GetSampFmt", (PyCFunction)alc_GetSampFmt, METH_VARARGS, alc_GetSampFmt__doc__},
{"SetChannels", (PyCFunction)alc_SetChannels, METH_VARARGS, alc_SetChannels__doc__},
{"GetChannels", (PyCFunction)alc_GetChannels, METH_VARARGS, alc_GetChannels__doc__},
{"SetFloatMax", (PyCFunction)alc_SetFloatMax, METH_VARARGS, alc_SetFloatMax__doc__},
{"GetFloatMax", (PyCFunction)alc_GetFloatMax, METH_VARARGS, alc_GetFloatMax__doc__},
{"SetDevice", (PyCFunction)alc_SetDevice, METH_VARARGS, alc_SetDevice__doc__},
{"GetDevice", (PyCFunction)alc_GetDevice, METH_VARARGS, alc_GetDevice__doc__},
{"SetQueueSize", (PyCFunction)alc_SetQueueSize, METH_VARARGS, alc_SetQueueSize__doc__},
{"GetQueueSize", (PyCFunction)alc_GetQueueSize, METH_VARARGS, alc_GetQueueSize__doc__},
#endif /* AL_NO_ELEM */
{"getqueuesize", (PyCFunction)alc_getqueuesize, METH_VARARGS},
{"setqueuesize", (PyCFunction)alc_setqueuesize, METH_VARARGS},
{"getwidth", (PyCFunction)alc_getwidth, METH_VARARGS},
{"setwidth", (PyCFunction)alc_setwidth, METH_VARARGS},
{"getchannels", (PyCFunction)alc_getchannels, METH_VARARGS},
{"setchannels", (PyCFunction)alc_setchannels, METH_VARARGS},
#ifdef AL_405
{"getsampfmt", (PyCFunction)alc_getsampfmt, METH_VARARGS},
{"setsampfmt", (PyCFunction)alc_setsampfmt, METH_VARARGS},
{"getfloatmax", (PyCFunction)alc_getfloatmax, METH_VARARGS},
{"setfloatmax", (PyCFunction)alc_setfloatmax, METH_VARARGS},
#endif /* AL_405 */
{NULL, NULL} /* sentinel */
};
/* ---------- */
static PyObject *
newalcobject(ALconfig config)
{
alcobject *self;
self = PyObject_New(alcobject, &Alctype);
if (self == NULL)
return NULL;
/* XXXX Add your own initializers here */
self->config = config;
return (PyObject *) self;
}
static void
alc_dealloc(alcobject *self)
{
/* XXXX Add your own cleanup code here */
#ifdef AL_NO_ELEM /* IRIX 6 */
(void) alFreeConfig(self->config); /* ignore errors */
#else
(void) ALfreeconfig(self->config); /* ignore errors */
#endif
PyObject_Del(self);
}
static PyObject *
alc_getattr(alcobject *self, char *name)
{
/* XXXX Add your own getattr code here */
return Py_FindMethod(alc_methods, (PyObject *)self, name);
}
static char Alctype__doc__[] =
""
;
static PyTypeObject Alctype = {
PyObject_HEAD_INIT(&PyType_Type)
0, /*ob_size*/
"al.config", /*tp_name*/
sizeof(alcobject), /*tp_basicsize*/
0, /*tp_itemsize*/
/* methods */
(destructor)alc_dealloc, /*tp_dealloc*/
(printfunc)0, /*tp_print*/
(getattrfunc)alc_getattr, /*tp_getattr*/
(setattrfunc)0, /*tp_setattr*/
(cmpfunc)0, /*tp_compare*/
(reprfunc)0, /*tp_repr*/
0, /*tp_as_number*/
0, /*tp_as_sequence*/
0, /*tp_as_mapping*/
(hashfunc)0, /*tp_hash*/
(ternaryfunc)0, /*tp_call*/
(reprfunc)0, /*tp_str*/
/* Space for future expansion */
0L,0L,0L,0L,
Alctype__doc__ /* Documentation string */
};
/* End of code for config objects */
/* ---------------------------------------------------------------- */
#ifdef AL_NO_ELEM /* IRIX 6 */
static char alp_SetConfig__doc__[] =
"alSetConfig: set the ALconfig of an audio ALport."
;
static PyObject *
alp_SetConfig(alpobject *self, PyObject *args)
{
alcobject *config;
if (!PyArg_ParseTuple(args, "O!:SetConfig", &Alctype, &config))
return NULL;
if (alSetConfig(self->port, config->config) < 0)
return NULL;
Py_INCREF(Py_None);
return Py_None;
}
static char alp_GetConfig__doc__[] =
"alGetConfig: get the ALconfig of an audio ALport."
;
static PyObject *
alp_GetConfig(alpobject *self, PyObject *args)
{
ALconfig config;
if (!PyArg_ParseTuple(args, ":GetConfig"))
return NULL;
if ((config = alGetConfig(self->port)) == NULL)
return NULL;
return newalcobject(config);
}
static char alp_GetResource__doc__[] =
"alGetResource: get the resource associated with an audio port."
;
static PyObject *
alp_GetResource(alpobject *self, PyObject *args)
{
int resource;
if (!PyArg_ParseTuple(args, ":GetResource"))
return NULL;
if ((resource = alGetResource(self->port)) == 0)
return NULL;
return PyInt_FromLong((long) resource);
}
static char alp_GetFD__doc__[] =
"alGetFD: get the file descriptor for an audio port."
;
static PyObject *
alp_GetFD(alpobject *self, PyObject *args)
{
int fd;
if (!PyArg_ParseTuple(args, ":GetFD"))
return NULL;
if ((fd = alGetFD(self->port)) < 0)
return NULL;
return PyInt_FromLong((long) fd);
}
static char alp_GetFilled__doc__[] =
"alGetFilled: return the number of filled sample frames in an audio port."
;
static PyObject *
alp_GetFilled(alpobject *self, PyObject *args)
{
int filled;
if (!PyArg_ParseTuple(args, ":GetFilled"))
return NULL;
if ((filled = alGetFilled(self->port)) < 0)
return NULL;
return PyInt_FromLong((long) filled);
}
static char alp_GetFillable__doc__[] =
"alGetFillable: report the number of unfilled sample frames in an audio port."
;
static PyObject *
alp_GetFillable(alpobject *self, PyObject *args)
{
int fillable;
if (!PyArg_ParseTuple(args, ":GetFillable"))
return NULL;
if ((fillable = alGetFillable(self->port)) < 0)
return NULL;
return PyInt_FromLong((long) fillable);
}
static char alp_ReadFrames__doc__[] =
"alReadFrames: read sample frames from an audio port."
;
static PyObject *
alp_ReadFrames(alpobject *self, PyObject *args)
{
void *samples;
int framecount;
PyObject *v;
int size;
int ch;
ALconfig c;
if (!PyArg_ParseTuple(args, "i:ReadFrames", &framecount))
return NULL;
if (framecount < 0) {
PyErr_SetString(ErrorObject, "negative framecount");
return NULL;
}
c = alGetConfig(self->port);
switch (alGetSampFmt(c)) {
case AL_SAMPFMT_TWOSCOMP:
switch (alGetWidth(c)) {
case AL_SAMPLE_8:
size = 1;
break;
case AL_SAMPLE_16:
size = 2;
break;
case AL_SAMPLE_24:
size = 4;
break;
default:
PyErr_SetString(ErrorObject, "can't determine width");
alFreeConfig(c);
return NULL;
}
break;
case AL_SAMPFMT_FLOAT:
size = 4;
break;
case AL_SAMPFMT_DOUBLE:
size = 8;
break;
default:
PyErr_SetString(ErrorObject, "can't determine format");
alFreeConfig(c);
return NULL;
}
ch = alGetChannels(c);
alFreeConfig(c);
if (ch < 0) {
PyErr_SetString(ErrorObject, "can't determine # of channels");
return NULL;
}
size *= ch;
v = PyString_FromStringAndSize((char *) NULL, size * framecount);
if (v == NULL)
return NULL;
Py_BEGIN_ALLOW_THREADS
alReadFrames(self->port, (void *) PyString_AS_STRING(v), framecount);
Py_END_ALLOW_THREADS
return v;
}
static char alp_DiscardFrames__doc__[] =
"alDiscardFrames: discard audio from an audio port."
;
static PyObject *
alp_DiscardFrames(alpobject *self, PyObject *args)
{
int framecount;
if (!PyArg_ParseTuple(args, "i:DiscardFrames", &framecount))
return NULL;
Py_BEGIN_ALLOW_THREADS
framecount = alDiscardFrames(self->port, framecount);
Py_END_ALLOW_THREADS
if (framecount < 0)
return NULL;
return PyInt_FromLong((long) framecount);
}
static char alp_ZeroFrames__doc__[] =
"alZeroFrames: write zero-valued sample frames to an audio port."
;
static PyObject *
alp_ZeroFrames(alpobject *self, PyObject *args)
{
int framecount;
if (!PyArg_ParseTuple(args, "i:ZeroFrames", &framecount))
return NULL;
if (framecount < 0) {
PyErr_SetString(ErrorObject, "negative framecount");
return NULL;
}
Py_BEGIN_ALLOW_THREADS
alZeroFrames(self->port, framecount);
Py_END_ALLOW_THREADS
Py_INCREF(Py_None);
return Py_None;
}
static char alp_SetFillPoint__doc__[] =
"alSetFillPoint: set low- or high-water mark for an audio port."
;
static PyObject *
alp_SetFillPoint(alpobject *self, PyObject *args)
{
int fillpoint;
if (!PyArg_ParseTuple(args, "i:SetFillPoint", &fillpoint))
return NULL;
if (alSetFillPoint(self->port, fillpoint) < 0)
return NULL;
Py_INCREF(Py_None);
return Py_None;
}
static char alp_GetFillPoint__doc__[] =
"alGetFillPoint: get low- or high-water mark for an audio port."
;
static PyObject *
alp_GetFillPoint(alpobject *self, PyObject *args)
{
int fillpoint;
if (!PyArg_ParseTuple(args, ":GetFillPoint"))
return NULL;
if ((fillpoint = alGetFillPoint(self->port)) < 0)
return NULL;
return PyInt_FromLong((long) fillpoint);
}
static char alp_GetFrameNumber__doc__[] =
"alGetFrameNumber: get the absolute sample frame number associated with a port."
;
static PyObject *
alp_GetFrameNumber(alpobject *self, PyObject *args)
{
stamp_t fnum;
if (!PyArg_ParseTuple(args, ":GetFrameNumber"))
return NULL;
if (alGetFrameNumber(self->port, &fnum) < 0)
return NULL;
return PyLong_FromLongLong((long long) fnum);
}
static char alp_GetFrameTime__doc__[] =
"alGetFrameTime: get the time at which a sample frame came in or will go out."
;
static PyObject *
alp_GetFrameTime(alpobject *self, PyObject *args)
{
stamp_t fnum, time;
PyObject *ret, *v0, *v1;
if (!PyArg_ParseTuple(args, ":GetFrameTime"))
return NULL;
if (alGetFrameTime(self->port, &fnum, &time) < 0)
return NULL;
v0 = PyLong_FromLongLong((long long) fnum);
v1 = PyLong_FromLongLong((long long) time);
if (PyErr_Occurred()) {
Py_XDECREF(v0);
Py_XDECREF(v1);
return NULL;
}
ret = Py_BuildValue("(OO)", v0, v1);
Py_DECREF(v0);
Py_DECREF(v1);
return ret;
}
static char alp_WriteFrames__doc__[] =
"alWriteFrames: write sample frames to an audio port."
;
static PyObject *
alp_WriteFrames(alpobject *self, PyObject *args)
{
char *samples;
int length;
int size, ch;
ALconfig c;
if (!PyArg_ParseTuple(args, "s#:WriteFrames", &samples, &length))
return NULL;
c = alGetConfig(self->port);
switch (alGetSampFmt(c)) {
case AL_SAMPFMT_TWOSCOMP:
switch (alGetWidth(c)) {
case AL_SAMPLE_8:
size = 1;
break;
case AL_SAMPLE_16:
size = 2;
break;
case AL_SAMPLE_24:
size = 4;
break;
default:
PyErr_SetString(ErrorObject, "can't determine width");
alFreeConfig(c);
return NULL;
}
break;
case AL_SAMPFMT_FLOAT:
size = 4;
break;
case AL_SAMPFMT_DOUBLE:
size = 8;
break;
default:
PyErr_SetString(ErrorObject, "can't determine format");
alFreeConfig(c);
return NULL;
}
ch = alGetChannels(c);
alFreeConfig(c);
if (ch < 0) {
PyErr_SetString(ErrorObject, "can't determine # of channels");
return NULL;
}
size *= ch;
if (length % size != 0) {
PyErr_SetString(ErrorObject,
"buffer length not whole number of frames");
return NULL;
}
Py_BEGIN_ALLOW_THREADS
alWriteFrames(self->port, (void *) samples, length / size);
Py_END_ALLOW_THREADS
Py_INCREF(Py_None);
return Py_None;
}
static char alp_ClosePort__doc__[] =