ref: bc1cc79225f0b006dd66d4fd81030d06f83bfca2
dir: /sys/src/cmd/python/Modules/sunaudiodev.c/
/* Sad objects */
#include "Python.h"
#include "structmember.h"
#ifdef HAVE_SYS_AUDIOIO_H
#define SOLARIS
#endif
#ifdef HAVE_FCNTL_H
#include <fcntl.h>
#endif
#include <stropts.h>
#include <sys/ioctl.h>
#ifdef SOLARIS
#include <sys/audioio.h>
#else
#include <sun/audioio.h>
#endif
/* #define offsetof(str,mem) ((int)(((str *)0)->mem)) */
typedef struct {
PyObject_HEAD
int x_fd; /* The open file */
int x_icount; /* # samples read */
int x_ocount; /* # samples written */
int x_isctl; /* True if control device */
} sadobject;
typedef struct {
PyObject_HEAD
audio_info_t ai;
} sadstatusobject;
static PyTypeObject Sadtype;
static PyTypeObject Sadstatustype;
static sadstatusobject *sads_alloc(void); /* Forward */
static PyObject *SunAudioError;
#define is_sadobject(v) ((v)->ob_type == &Sadtype)
#define is_sadstatusobject(v) ((v)->ob_type == &Sadstatustype)
static sadobject *
newsadobject(PyObject *args)
{
sadobject *xp;
int fd;
char *mode;
int imode;
char* basedev;
char* ctldev;
char* opendev;
/* Check arg for r/w/rw */
if (!PyArg_ParseTuple(args, "s", &mode))
return NULL;
if (strcmp(mode, "r") == 0)
imode = 0;
else if (strcmp(mode, "w") == 0)
imode = 1;
else if (strcmp(mode, "rw") == 0)
imode = 2;
else if (strcmp(mode, "control") == 0)
imode = -1;
else {
PyErr_SetString(SunAudioError,
"Mode should be one of 'r', 'w', 'rw' or 'control'");
return NULL;
}
/* Open the correct device. The base device name comes from the
* AUDIODEV environment variable first, then /dev/audio. The
* control device tacks "ctl" onto the base device name.
*/
basedev = getenv("AUDIODEV");
if (!basedev)
basedev = "/dev/audio";
ctldev = PyMem_NEW(char, strlen(basedev) + 4);
if (!ctldev) {
PyErr_NoMemory();
return NULL;
}
strcpy(ctldev, basedev);
strcat(ctldev, "ctl");
if (imode < 0) {
opendev = ctldev;
fd = open(ctldev, 2);
}
else {
opendev = basedev;
fd = open(basedev, imode);
}
if (fd < 0) {
PyErr_SetFromErrnoWithFilename(SunAudioError, opendev);
PyMem_DEL(ctldev);
return NULL;
}
PyMem_DEL(ctldev);
/* Create and initialize the object */
xp = PyObject_New(sadobject, &Sadtype);
if (xp == NULL) {
close(fd);
return NULL;
}
xp->x_fd = fd;
xp->x_icount = xp->x_ocount = 0;
xp->x_isctl = (imode < 0);
return xp;
}
/* Sad methods */
static void
sad_dealloc(sadobject *xp)
{
close(xp->x_fd);
PyObject_Del(xp);
}
static PyObject *
sad_read(sadobject *self, PyObject *args)
{
int size, count;
char *cp;
PyObject *rv;
if (!PyArg_ParseTuple(args, "i:read", &size))
return NULL;
rv = PyString_FromStringAndSize(NULL, size);
if (rv == NULL)
return NULL;
if (!(cp = PyString_AsString(rv)))
goto finally;
count = read(self->x_fd, cp, size);
if (count < 0) {
PyErr_SetFromErrno(SunAudioError);
goto finally;
}
#if 0
/* TBD: why print this message if you can handle the condition?
* assume it's debugging info which we can just as well get rid
* of. in any case this message should *not* be using printf!
*/
if (count != size)
printf("sunaudio: funny read rv %d wtd %d\n", count, size);
#endif
self->x_icount += count;
return rv;
finally:
Py_DECREF(rv);
return NULL;
}
static PyObject *
sad_write(sadobject *self, PyObject *args)
{
char *cp;
int count, size;
if (!PyArg_ParseTuple(args, "s#:write", &cp, &size))
return NULL;
count = write(self->x_fd, cp, size);
if (count < 0) {
PyErr_SetFromErrno(SunAudioError);
return NULL;
}
#if 0
if (count != size)
printf("sunaudio: funny write rv %d wanted %d\n", count, size);
#endif
self->x_ocount += count;
Py_INCREF(Py_None);
return Py_None;
}
static PyObject *
sad_getinfo(sadobject *self)
{
sadstatusobject *rv;
if (!(rv = sads_alloc()))
return NULL;
if (ioctl(self->x_fd, AUDIO_GETINFO, &rv->ai) < 0) {
PyErr_SetFromErrno(SunAudioError);
Py_DECREF(rv);
return NULL;
}
return (PyObject *)rv;
}
static PyObject *
sad_setinfo(sadobject *self, sadstatusobject *arg)
{
if (!is_sadstatusobject(arg)) {
PyErr_SetString(PyExc_TypeError,
"Must be sun audio status object");
return NULL;
}
if (ioctl(self->x_fd, AUDIO_SETINFO, &arg->ai) < 0) {
PyErr_SetFromErrno(SunAudioError);
return NULL;
}
Py_INCREF(Py_None);
return Py_None;
}
static PyObject *
sad_ibufcount(sadobject *self)
{
audio_info_t ai;
if (ioctl(self->x_fd, AUDIO_GETINFO, &ai) < 0) {
PyErr_SetFromErrno(SunAudioError);
return NULL;
}
return PyInt_FromLong(ai.record.samples - self->x_icount);
}
static PyObject *
sad_obufcount(sadobject *self)
{
audio_info_t ai;
if (ioctl(self->x_fd, AUDIO_GETINFO, &ai) < 0) {
PyErr_SetFromErrno(SunAudioError);
return NULL;
}
/* x_ocount is in bytes, whereas play.samples is in frames */
/* we want frames */
return PyInt_FromLong(self->x_ocount / (ai.play.channels *
ai.play.precision / 8) -
ai.play.samples);
}
static PyObject *
sad_drain(sadobject *self)
{
if (ioctl(self->x_fd, AUDIO_DRAIN, 0) < 0) {
PyErr_SetFromErrno(SunAudioError);
return NULL;
}
Py_INCREF(Py_None);
return Py_None;
}
#ifdef SOLARIS
static PyObject *
sad_getdev(sadobject *self)
{
struct audio_device ad;
if (ioctl(self->x_fd, AUDIO_GETDEV, &ad) < 0) {
PyErr_SetFromErrno(SunAudioError);
return NULL;
}
return Py_BuildValue("(sss)", ad.name, ad.version, ad.config);
}
#endif
static PyObject *
sad_flush(sadobject *self)
{
if (ioctl(self->x_fd, I_FLUSH, FLUSHW) < 0) {
PyErr_SetFromErrno(SunAudioError);
return NULL;
}
Py_INCREF(Py_None);
return Py_None;
}
static PyObject *
sad_close(sadobject *self)
{
if (self->x_fd >= 0) {
close(self->x_fd);
self->x_fd = -1;
}
Py_INCREF(Py_None);
return Py_None;
}
static PyObject *
sad_fileno(sadobject *self)
{
return PyInt_FromLong(self->x_fd);
}
static PyMethodDef sad_methods[] = {
{ "read", (PyCFunction)sad_read, METH_VARARGS },
{ "write", (PyCFunction)sad_write, METH_VARARGS },
{ "ibufcount", (PyCFunction)sad_ibufcount, METH_NOARGS },
{ "obufcount", (PyCFunction)sad_obufcount, METH_NOARGS },
#define CTL_METHODS 4
{ "getinfo", (PyCFunction)sad_getinfo, METH_NOARGS },
{ "setinfo", (PyCFunction)sad_setinfo, METH_O},
{ "drain", (PyCFunction)sad_drain, METH_NOARGS },
{ "flush", (PyCFunction)sad_flush, METH_NOARGS },
#ifdef SOLARIS
{ "getdev", (PyCFunction)sad_getdev, METH_NOARGS },
#endif
{ "close", (PyCFunction)sad_close, METH_NOARGS },
{ "fileno", (PyCFunction)sad_fileno, METH_NOARGS },
{NULL, NULL} /* sentinel */
};
static PyObject *
sad_getattr(sadobject *xp, char *name)
{
if (xp->x_isctl)
return Py_FindMethod(sad_methods+CTL_METHODS,
(PyObject *)xp, name);
else
return Py_FindMethod(sad_methods, (PyObject *)xp, name);
}
/* ----------------------------------------------------------------- */
static sadstatusobject *
sads_alloc(void) {
return PyObject_New(sadstatusobject, &Sadstatustype);
}
static void
sads_dealloc(sadstatusobject *xp)
{
PyMem_DEL(xp);
}
#define OFF(x) offsetof(audio_info_t,x)
static struct memberlist sads_ml[] = {
{ "i_sample_rate", T_UINT, OFF(record.sample_rate) },
{ "i_channels", T_UINT, OFF(record.channels) },
{ "i_precision", T_UINT, OFF(record.precision) },
{ "i_encoding", T_UINT, OFF(record.encoding) },
{ "i_gain", T_UINT, OFF(record.gain) },
{ "i_port", T_UINT, OFF(record.port) },
{ "i_samples", T_UINT, OFF(record.samples) },
{ "i_eof", T_UINT, OFF(record.eof) },
{ "i_pause", T_UBYTE, OFF(record.pause) },
{ "i_error", T_UBYTE, OFF(record.error) },
{ "i_waiting", T_UBYTE, OFF(record.waiting) },
{ "i_open", T_UBYTE, OFF(record.open) , RO},
{ "i_active", T_UBYTE, OFF(record.active) , RO},
#ifdef SOLARIS
{ "i_buffer_size", T_UINT, OFF(record.buffer_size) },
{ "i_balance", T_UBYTE, OFF(record.balance) },
{ "i_avail_ports", T_UINT, OFF(record.avail_ports) },
#endif
{ "o_sample_rate", T_UINT, OFF(play.sample_rate) },
{ "o_channels", T_UINT, OFF(play.channels) },
{ "o_precision", T_UINT, OFF(play.precision) },
{ "o_encoding", T_UINT, OFF(play.encoding) },
{ "o_gain", T_UINT, OFF(play.gain) },
{ "o_port", T_UINT, OFF(play.port) },
{ "o_samples", T_UINT, OFF(play.samples) },
{ "o_eof", T_UINT, OFF(play.eof) },
{ "o_pause", T_UBYTE, OFF(play.pause) },
{ "o_error", T_UBYTE, OFF(play.error) },
{ "o_waiting", T_UBYTE, OFF(play.waiting) },
{ "o_open", T_UBYTE, OFF(play.open) , RO},
{ "o_active", T_UBYTE, OFF(play.active) , RO},
#ifdef SOLARIS
{ "o_buffer_size", T_UINT, OFF(play.buffer_size) },
{ "o_balance", T_UBYTE, OFF(play.balance) },
{ "o_avail_ports", T_UINT, OFF(play.avail_ports) },
#endif
{ "monitor_gain", T_UINT, OFF(monitor_gain) },
{ NULL, 0, 0},
};
static PyObject *
sads_getattr(sadstatusobject *xp, char *name)
{
return PyMember_Get((char *)&xp->ai, sads_ml, name);
}
static int
sads_setattr(sadstatusobject *xp, char *name, PyObject *v)
{
if (v == NULL) {
PyErr_SetString(PyExc_TypeError,
"can't delete sun audio status attributes");
return -1;
}
return PyMember_Set((char *)&xp->ai, sads_ml, name, v);
}
/* ------------------------------------------------------------------- */
static PyTypeObject Sadtype = {
PyObject_HEAD_INIT(&PyType_Type)
0, /*ob_size*/
"sunaudiodev.sun_audio_device", /*tp_name*/
sizeof(sadobject), /*tp_size*/
0, /*tp_itemsize*/
/* methods */
(destructor)sad_dealloc, /*tp_dealloc*/
0, /*tp_print*/
(getattrfunc)sad_getattr, /*tp_getattr*/
0, /*tp_setattr*/
0, /*tp_compare*/
0, /*tp_repr*/
};
static PyTypeObject Sadstatustype = {
PyObject_HEAD_INIT(&PyType_Type)
0, /*ob_size*/
"sunaudiodev.sun_audio_device_status", /*tp_name*/
sizeof(sadstatusobject), /*tp_size*/
0, /*tp_itemsize*/
/* methods */
(destructor)sads_dealloc, /*tp_dealloc*/
0, /*tp_print*/
(getattrfunc)sads_getattr, /*tp_getattr*/
(setattrfunc)sads_setattr, /*tp_setattr*/
0, /*tp_compare*/
0, /*tp_repr*/
};
/* ------------------------------------------------------------------- */
static PyObject *
sadopen(PyObject *self, PyObject *args)
{
return (PyObject *)newsadobject(args);
}
static PyMethodDef sunaudiodev_methods[] = {
{ "open", sadopen, METH_VARARGS },
{ 0, 0 },
};
void
initsunaudiodev(void)
{
PyObject *m, *d;
m = Py_InitModule("sunaudiodev", sunaudiodev_methods);
if (m == NULL)
return;
d = PyModule_GetDict(m);
SunAudioError = PyErr_NewException("sunaudiodev.error", NULL, NULL);
if (SunAudioError)
PyDict_SetItemString(d, "error", SunAudioError);
}