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alsa-lib/modules/mixer/simple/python.c
Jaroslav Kysela 5b9041bced Change FSF address (Franklin Street) 
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
2017-11-14 14:29:26 +01:00

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/*
* Mixer Interface - python binding simple abstact module
* Copyright (c) 2007 by Jaroslav Kysela <perex@perex.cz>
*
*
* This library is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#include "Python.h"
#include <stddef.h>
#include "config.h"
#include "asoundlib.h"
#include "mixer_abst.h"
struct python_priv {
int py_initialized;
PyObject *py_event_func;
PyObject *py_mdict;
PyObject *py_mixer;
};
#define SCRIPT ALSA_PLUGIN_DIR "/smixer/python/main.py"
struct pymelem {
PyObject_HEAD
sm_selem_t selem;
PyObject *py_mixer;
snd_mixer_elem_t *melem;
};
struct pymixer {
PyObject_HEAD
snd_mixer_class_t *class;
snd_mixer_t *mixer;
PyObject *mdict;
int hctl_count;
void **hctl;
int helem_count;
void **helem;
int melem_count;
void **melem;
};
static PyInterpreterState *main_interpreter;
static void *get_C_ptr(PyObject *obj, const char *attr)
{
PyObject *o;
o = PyObject_GetAttr(obj, PyString_InternFromString(attr));
if (!o) {
PyErr_Format(PyExc_TypeError, "missing '%s' attribute", attr);
return NULL;
}
if (!PyInt_Check(o)) {
PyErr_Format(PyExc_TypeError, "'%s' attribute is not integer", attr);
return NULL;
}
return (void *)PyInt_AsLong(o);
}
static struct pymelem *melem_to_pymelem(snd_mixer_elem_t *elem)
{
return (struct pymelem *)((char *)snd_mixer_elem_get_private(elem) - offsetof(struct pymelem, selem));
}
static int pcall(struct pymelem *pymelem, const char *attr, PyObject *args, PyObject **_res)
{
PyObject *obj = (PyObject *)pymelem, *res;
int xres = 0;
if (_res)
*_res = NULL;
obj = PyObject_GetAttr(obj, PyString_InternFromString(attr));
if (!obj) {
PyErr_Format(PyExc_TypeError, "missing '%s' attribute", attr);
PyErr_Print();
PyErr_Clear();
Py_DECREF(args);
return -EIO;
}
res = PyObject_CallObject(obj, args);
Py_XDECREF(args);
if (res == NULL) {
PyErr_Print();
PyErr_Clear();
return -EIO;
}
if (_res && PyTuple_Check(res)) {
*_res = res;
res = PyTuple_GetItem(res, 0);
}
if (PyInt_Check(res)) {
xres = PyInt_AsLong(res);
} else if (res == Py_None) {
xres = 0;
} else if (PyBool_Check(res)) {
xres = res == Py_True;
} else {
PyErr_Format(PyExc_TypeError, "wrong result from '%s'!", attr);
PyErr_Print();
PyErr_Clear();
Py_DECREF(res);
if (_res)
*_res = NULL;
return -EIO;
}
if (_res && *_res)
return xres;
Py_DECREF(res);
return xres;
}
static int is_ops(snd_mixer_elem_t *elem, int dir, int cmd, int val)
{
PyObject *obj1;
struct pymelem *pymelem = melem_to_pymelem(elem);
char *s, fcn[32] = "opsIs";
int res, xdir = 1, xval = 0;
switch (cmd) {
case SM_OPS_IS_ACTIVE: s = "Active"; xdir = 0; break;
case SM_OPS_IS_MONO: s = "Mono"; break;
case SM_OPS_IS_CHANNEL: s = "Channel"; xval = 1; break;
case SM_OPS_IS_ENUMERATED: s = "Enumerated"; xdir = val == 1; break;
case SM_OPS_IS_ENUMCNT: s = "EnumCnt"; break;
default:
return 1;
}
strcat(fcn, s);
obj1 = PyTuple_New(xdir + xval);
if (xdir) {
PyTuple_SET_ITEM(obj1, 0, PyInt_FromLong(dir));
if (xval)
PyTuple_SET_ITEM(obj1, 1, PyInt_FromLong(val));
}
res = pcall(pymelem, fcn, obj1, NULL);
return res < 0 ? 0 : res;
}
static int get_x_range_ops(snd_mixer_elem_t *elem, int dir,
long *min, long *max, const char *attr)
{
PyObject *obj1, *res;
struct pymelem *pymelem = melem_to_pymelem(elem);
int err;
obj1 = PyTuple_New(1);
PyTuple_SET_ITEM(obj1, 0, PyInt_FromLong(dir));
err = pcall(pymelem, attr, obj1, &res);
if (err >= 0) {
err = !PyInt_Check(PyTuple_GetItem(res, 1)) || !PyInt_Check(PyTuple_GetItem(res, 2));
if (err) {
err = !PyLong_Check(PyTuple_GetItem(res, 1)) || !PyLong_Check(PyTuple_GetItem(res, 2));
if (err) {
PyErr_Format(PyExc_TypeError, "wrong result (invalid tuple)");
PyErr_Print();
PyErr_Clear();
err = -EIO;
} else {
*min = PyLong_AsLong(PyTuple_GetItem(res, 1));
*max = PyLong_AsLong(PyTuple_GetItem(res, 2));
}
} else {
*min = PyInt_AsLong(PyTuple_GetItem(res, 1));
*max = PyInt_AsLong(PyTuple_GetItem(res, 2));
}
}
Py_XDECREF(res);
return err;
}
static int get_range_ops(snd_mixer_elem_t *elem, int dir,
long *min, long *max)
{
return get_x_range_ops(elem, dir, min, max, "opsGetRange");
}
static int set_range_ops(snd_mixer_elem_t *elem, int dir,
long min, long max)
{
PyObject *obj1;
struct pymelem *pymelem = melem_to_pymelem(elem);
obj1 = PyTuple_New(3);
PyTuple_SET_ITEM(obj1, 0, PyInt_FromLong(dir));
PyTuple_SET_ITEM(obj1, 1, PyInt_FromLong(min));
PyTuple_SET_ITEM(obj1, 2, PyInt_FromLong(max));
return pcall(pymelem, "opsGetRange", obj1, NULL);
}
static int get_x_ops(snd_mixer_elem_t *elem, int dir,
long channel, long *value,
const char *attr)
{
PyObject *obj1, *res;
struct pymelem *pymelem = melem_to_pymelem(elem);
int err;
obj1 = PyTuple_New(2);
PyTuple_SET_ITEM(obj1, 0, PyInt_FromLong(dir));
PyTuple_SET_ITEM(obj1, 1, PyInt_FromLong(channel));
err = pcall(pymelem, attr, obj1, &res);
if (err >= 0) {
err = !PyInt_Check(PyTuple_GetItem(res, 1));
if (err) {
err = !PyLong_Check(PyTuple_GetItem(res, 1));
if (err) {
PyErr_Format(PyExc_TypeError, "wrong result (invalid tuple)");
PyErr_Print();
PyErr_Clear();
err = -EIO;
} else {
*value = PyLong_AsLong(PyTuple_GetItem(res, 1));
}
} else {
*value = PyInt_AsLong(PyTuple_GetItem(res, 1));
}
}
Py_XDECREF(res);
return err;
}
static int get_volume_ops(snd_mixer_elem_t *elem, int dir,
snd_mixer_selem_channel_id_t channel, long *value)
{
return get_x_ops(elem, dir, channel, value, "opsGetVolume");
}
static int get_switch_ops(snd_mixer_elem_t *elem, int dir,
snd_mixer_selem_channel_id_t channel, int *value)
{
long value1;
int res;
res = get_x_ops(elem, dir, channel, &value1, "opsGetSwitch");
*value = value1;
return res;
}
static int ask_vol_dB_ops(snd_mixer_elem_t *elem,
int dir,
long value,
long *dbValue)
{
return get_x_ops(elem, dir, value, dbValue, "opsGetVolDB");
}
static int ask_dB_vol_ops(snd_mixer_elem_t *elem,
int dir,
long value,
long *dbValue,
int xdir)
{
PyObject *obj1, *res;
struct pymelem *pymelem = melem_to_pymelem(elem);
int err;
obj1 = PyTuple_New(3);
PyTuple_SET_ITEM(obj1, 0, PyInt_FromLong(dir));
PyTuple_SET_ITEM(obj1, 1, PyInt_FromLong(value));
PyTuple_SET_ITEM(obj1, 2, PyInt_FromLong(xdir));
err = pcall(pymelem, "opsGetDBVol", obj1, &res);
if (err >= 0) {
err = !PyInt_Check(PyTuple_GetItem(res, 1));
if (err) {
err = !PyLong_Check(PyTuple_GetItem(res, 1));
if (err) {
PyErr_Format(PyExc_TypeError, "wrong result (invalid tuple)");
PyErr_Print();
PyErr_Clear();
err = -EIO;
} else {
*dbValue = PyLong_AsLong(PyTuple_GetItem(res, 1));
}
} else {
*dbValue = PyInt_AsLong(PyTuple_GetItem(res, 1));
}
}
Py_XDECREF(res);
return err;
}
static int get_dB_ops(snd_mixer_elem_t *elem,
int dir,
snd_mixer_selem_channel_id_t channel,
long *value)
{
return get_x_ops(elem, dir, channel, value, "opsGetDB");
}
static int get_dB_range_ops(snd_mixer_elem_t *elem, int dir,
long *min, long *max)
{
return get_x_range_ops(elem, dir, min, max, "opsGetDBRange");
}
static int set_volume_ops(snd_mixer_elem_t *elem, int dir,
snd_mixer_selem_channel_id_t channel, long value)
{
PyObject *obj1;
struct pymelem *pymelem = melem_to_pymelem(elem);
obj1 = PyTuple_New(3);
PyTuple_SET_ITEM(obj1, 0, PyInt_FromLong(dir));
PyTuple_SET_ITEM(obj1, 1, PyInt_FromLong(channel));
PyTuple_SET_ITEM(obj1, 2, PyInt_FromLong(value));
return pcall(pymelem, "opsSetVolume", obj1, NULL);
}
static int set_switch_ops(snd_mixer_elem_t *elem, int dir,
snd_mixer_selem_channel_id_t channel, int value)
{
PyObject *obj1;
struct pymelem *pymelem = melem_to_pymelem(elem);
obj1 = PyTuple_New(3);
PyTuple_SET_ITEM(obj1, 0, PyInt_FromLong(dir));
PyTuple_SET_ITEM(obj1, 1, PyInt_FromLong(channel));
PyTuple_SET_ITEM(obj1, 2, PyInt_FromLong(value));
return pcall(pymelem, "opsSetSwitch", obj1, NULL);
}
static int set_dB_ops(snd_mixer_elem_t *elem, int dir,
snd_mixer_selem_channel_id_t channel,
long db_gain, int xdir)
{
PyObject *obj1;
struct pymelem *pymelem = melem_to_pymelem(elem);
obj1 = PyTuple_New(4);
PyTuple_SET_ITEM(obj1, 0, PyInt_FromLong(dir));
PyTuple_SET_ITEM(obj1, 1, PyInt_FromLong(channel));
PyTuple_SET_ITEM(obj1, 2, PyInt_FromLong(db_gain));
PyTuple_SET_ITEM(obj1, 3, PyInt_FromLong(xdir));
return pcall(pymelem, "opsSetDB", obj1, NULL);
}
static int enum_item_name_ops(snd_mixer_elem_t *elem,
unsigned int item,
size_t maxlen, char *buf)
{
PyObject *obj1, *res;
struct pymelem *pymelem = melem_to_pymelem(elem);
int err;
unsigned int len;
char *s;
obj1 = PyTuple_New(1);
PyTuple_SET_ITEM(obj1, 0, PyInt_FromLong(item));
err = pcall(pymelem, "opsGetEnumItemName", obj1, &res);
if (err >= 0) {
err = !PyString_Check(PyTuple_GetItem(res, 1));
if (err) {
PyErr_Format(PyExc_TypeError, "wrong result (invalid tuple)");
PyErr_Print();
PyErr_Clear();
err = -EIO;
} else {
s = PyString_AsString(PyTuple_GetItem(res, 1));
len = strlen(s);
if (maxlen - 1 > len)
len = maxlen - 1;
memcpy(buf, s, len);
buf[len] = '\0';
}
}
Py_XDECREF(res);
return err;
}
static int get_enum_item_ops(snd_mixer_elem_t *elem,
snd_mixer_selem_channel_id_t channel,
unsigned int *itemp)
{
PyObject *obj1, *res;
struct pymelem *pymelem = melem_to_pymelem(elem);
int err;
obj1 = PyTuple_New(1);
PyTuple_SET_ITEM(obj1, 0, PyInt_FromLong(channel));
err = pcall(pymelem, "opsGetEnumItem", obj1, &res);
if (err >= 0) {
err = !PyInt_Check(PyTuple_GetItem(res, 1));
if (err) {
PyErr_Format(PyExc_TypeError, "wrong result (invalid tuple)");
PyErr_Print();
PyErr_Clear();
err = -EIO;
} else {
*itemp = PyInt_AsLong(PyTuple_GetItem(res, 1));
}
}
Py_XDECREF(res);
return err;
}
static int set_enum_item_ops(snd_mixer_elem_t *elem,
snd_mixer_selem_channel_id_t channel,
unsigned int item)
{
PyObject *obj1;
struct pymelem *pymelem = melem_to_pymelem(elem);
obj1 = PyTuple_New(2);
PyTuple_SET_ITEM(obj1, 0, PyInt_FromLong(channel));
PyTuple_SET_ITEM(obj1, 1, PyInt_FromLong(item));
return pcall(pymelem, "opsSetEnumItem", obj1, NULL);
}
static struct sm_elem_ops simple_python_ops = {
.is = is_ops,
.get_range = get_range_ops,
.get_dB_range = get_dB_range_ops,
.set_range = set_range_ops,
.ask_vol_dB = ask_vol_dB_ops,
.ask_dB_vol = ask_dB_vol_ops,
.get_volume = get_volume_ops,
.get_dB = get_dB_ops,
.set_volume = set_volume_ops,
.set_dB = set_dB_ops,
.get_switch = get_switch_ops,
.set_switch = set_switch_ops,
.enum_item_name = enum_item_name_ops,
.get_enum_item = get_enum_item_ops,
.set_enum_item = set_enum_item_ops
};
static void selem_free(snd_mixer_elem_t *elem)
{
sm_selem_t *simple = snd_mixer_elem_get_private(elem);
if (simple->id) {
snd_mixer_selem_id_free(simple->id);
simple->id = NULL;
}
}
static PyObject *
pymelem_cap(struct pymelem *pymelem ATTRIBUTE_UNUSED, void *priv)
{
return PyInt_FromLong((long)priv);
}
static PyObject *
pymelem_get_caps(struct pymelem *pymelem, void *priv ATTRIBUTE_UNUSED)
{
return PyInt_FromLong(pymelem->selem.caps);
}
static PyObject *
pymelem_get_name(struct pymelem *pymelem, void *priv ATTRIBUTE_UNUSED)
{
return PyString_FromString(snd_mixer_selem_id_get_name(pymelem->selem.id));
}
static PyObject *
pymelem_get_index(struct pymelem *pymelem, void *priv ATTRIBUTE_UNUSED)
{
return PyInt_FromLong(snd_mixer_selem_id_get_index(pymelem->selem.id));
}
static int
pymelem_set_caps(struct pymelem *pymelem, PyObject *val, void *priv ATTRIBUTE_UNUSED)
{
if (!PyInt_Check(val)) {
PyErr_SetString(PyExc_TypeError, "The last attribute value must be an integer");
return -1;
}
pymelem->selem.caps = PyInt_AsLong(val);
return 0;
}
static PyObject *
pymelem_ignore(struct pymelem *pymelem ATTRIBUTE_UNUSED, PyObject *args ATTRIBUTE_UNUSED)
{
Py_RETURN_NONE;
}
static PyObject *
pymelem_ignore1(struct pymelem *pymelem ATTRIBUTE_UNUSED, PyObject *args ATTRIBUTE_UNUSED)
{
Py_RETURN_TRUE;
}
static PyObject *
pymelem_error(struct pymelem *pymelem ATTRIBUTE_UNUSED, PyObject *args ATTRIBUTE_UNUSED)
{
return PyInt_FromLong(-EIO);
}
static PyObject *
pymelem_attach(struct pymelem *pymelem, PyObject *args)
{
PyObject *obj;
snd_hctl_elem_t *helem;
int err;
if (!PyArg_ParseTuple(args, "O", &obj))
return NULL;
helem = (snd_hctl_elem_t *)get_C_ptr(obj, "get_C_helem");
if (helem == NULL)
return NULL;
err = snd_mixer_elem_attach(pymelem->melem, helem);
if (err < 0) {
PyErr_Format(PyExc_RuntimeError, "Cannot attach hcontrol element to mixer element: %s", snd_strerror(err));
return NULL;
}
Py_RETURN_NONE;
}
static PyObject *
pymelem_detach(struct pymelem *pymelem, PyObject *args)
{
PyObject *obj;
snd_hctl_elem_t *helem;
int err;
if (!PyArg_ParseTuple(args, "O", &obj))
return NULL;
helem = (snd_hctl_elem_t *)get_C_ptr(obj, "get_C_helem");
if (helem == NULL)
return NULL;
err = snd_mixer_elem_detach(pymelem->melem, helem);
if (err < 0) {
PyErr_Format(PyExc_RuntimeError, "Cannot detach hcontrol element to mixer element: %s", snd_strerror(err));
return NULL;
}
Py_RETURN_NONE;
}
static PyObject *
pymelem_event_info(struct pymelem *pymelem, PyObject *args)
{
if (!PyArg_ParseTuple(args, ""))
return NULL;
return PyInt_FromLong(snd_mixer_elem_info(pymelem->melem));
}
static PyObject *
pymelem_event_value(struct pymelem *pymelem, PyObject *args)
{
if (!PyArg_ParseTuple(args, ""))
return NULL;
return PyInt_FromLong(snd_mixer_elem_value(pymelem->melem));
}
static int
pymelem_init(struct pymelem *pymelem, PyObject *args, PyObject *kwds ATTRIBUTE_UNUSED)
{
char *name;
long index, weight;
snd_mixer_selem_id_t *id;
int err;
if (!PyArg_ParseTuple(args, "Osii", &pymelem->py_mixer, &name, &index, &weight))
return -1;
memset(&pymelem->selem, 0, sizeof(pymelem->selem));
if (snd_mixer_selem_id_malloc(&id))
return -1;
snd_mixer_selem_id_set_name(id, name);
snd_mixer_selem_id_set_index(id, index);
pymelem->selem.id = id;
pymelem->selem.ops = &simple_python_ops;
err = snd_mixer_elem_new(&pymelem->melem, SND_MIXER_ELEM_SIMPLE,
weight, &pymelem->selem, selem_free);
if (err < 0) {
snd_mixer_selem_id_free(id);
return -1;
}
return 0;
}
static void
pymelem_dealloc(struct pymelem *self)
{
selem_free(self->melem);
self->ob_type->tp_free(self);
}
static PyGetSetDef pymelem_getseters[] = {
{"CAP_GVOLUME", (getter)pymelem_cap, NULL, NULL, (void *)SM_CAP_GVOLUME},
{"CAP_GSWITCH", (getter)pymelem_cap, NULL, NULL, (void *)SM_CAP_GSWITCH},
{"CAP_PVOLUME", (getter)pymelem_cap, NULL, NULL, (void *)SM_CAP_PVOLUME},
{"CAP_PVOLUME_JOIN", (getter)pymelem_cap, NULL, NULL, (void *)SM_CAP_PVOLUME_JOIN},
{"CAP_PSWITCH", (getter)pymelem_cap, NULL, NULL, (void *)SM_CAP_PSWITCH},
{"CAP_PSWITCH_JOIN", (getter)pymelem_cap, NULL, NULL, (void *)SM_CAP_PSWITCH_JOIN},
{"CAP_CVOLUME", (getter)pymelem_cap, NULL, NULL, (void *)SM_CAP_CVOLUME},
{"CAP_CVOLUME_JOIN", (getter)pymelem_cap, NULL, NULL, (void *)SM_CAP_CVOLUME_JOIN},
{"CAP_CSWITCH", (getter)pymelem_cap, NULL, NULL, (void *)SM_CAP_CSWITCH},
{"CAP_CSWITCH_JOIN", (getter)pymelem_cap, NULL, NULL, (void *)SM_CAP_CSWITCH_JOIN},
{"CAP_CSWITCH_EXCL", (getter)pymelem_cap, NULL, NULL, (void *)SM_CAP_CSWITCH_EXCL},
{"CAP_PENUM", (getter)pymelem_cap, NULL, NULL, (void *)SM_CAP_PENUM},
{"CAP_CENUM", (getter)pymelem_cap, NULL, NULL, (void *)SM_CAP_CENUM},
{"caps", (getter)pymelem_get_caps, (setter)pymelem_set_caps, NULL, NULL},
{"name", (getter)pymelem_get_name, NULL, NULL, NULL},
{"index", (getter)pymelem_get_index, NULL, NULL, NULL},
{NULL,NULL,NULL,NULL,NULL}
};
static PyMethodDef pymelem_methods[] = {
{"attach", (PyCFunction)pymelem_attach, METH_VARARGS, NULL},
{"detach", (PyCFunction)pymelem_detach, METH_VARARGS, NULL},
/* "default" functions - no functionality */
{"opsIsActive", (PyCFunction)pymelem_ignore1, METH_VARARGS, NULL},
{"opsIsMono", (PyCFunction)pymelem_ignore, METH_VARARGS, NULL},
{"opsIsChannel", (PyCFunction)pymelem_ignore, METH_VARARGS, NULL},
{"opsIsEnumerated", (PyCFunction)pymelem_ignore, METH_VARARGS, NULL},
{"opsIsEnumCnt", (PyCFunction)pymelem_ignore, METH_VARARGS, NULL},
{"opsGetDB", (PyCFunction)pymelem_error, METH_VARARGS, NULL},
{"eventInfo", (PyCFunction)pymelem_event_info, METH_VARARGS, NULL},
{"eventValue", (PyCFunction)pymelem_event_value, METH_VARARGS, NULL},
{NULL,NULL,0,NULL}
};
static PyTypeObject pymelem_type = {
PyObject_HEAD_INIT(0)
tp_name: "smixer_python.InternalMElement",
tp_basicsize: sizeof(struct pymelem),
tp_dealloc: (destructor)pymelem_dealloc,
tp_flags: Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE,
tp_doc: NULL /* mixerinit__doc__ */,
tp_getset: pymelem_getseters,
tp_init: (initproc)pymelem_init,
tp_alloc: PyType_GenericAlloc,
tp_new: PyType_GenericNew,
tp_free: PyObject_Del,
tp_methods: pymelem_methods,
};
static PyObject *
pymixer_attach_hctl(struct pymixer *pymixer, PyObject *args)
{
PyObject *obj;
snd_hctl_t *hctl;
void **hctls;
int err;
if (!PyArg_ParseTuple(args, "O", &obj))
return NULL;
hctl = (snd_hctl_t *)get_C_ptr(obj, "get_C_hctl");
if (hctl == NULL)
return NULL;
err = snd_mixer_attach_hctl(pymixer->mixer, hctl);
if (err < 0) {
PyErr_Format(PyExc_RuntimeError, "Cannot attach hctl: %s", snd_strerror(err));
return NULL;
}
hctls = realloc(pymixer->hctl, sizeof(void *) * (pymixer->hctl_count+1) * 2);
if (hctls == NULL) {
PyErr_SetString(PyExc_RuntimeError, "No enough memory");
return NULL;
}
pymixer->hctl = hctls;
pymixer->hctl[pymixer->hctl_count*2] = (void *)hctl;
pymixer->hctl[pymixer->hctl_count*2+1] = (void *)obj;
pymixer->hctl_count++;
Py_INCREF(obj);
Py_RETURN_NONE;
}
static PyObject *
pymixer_register(struct pymixer *pymixer, PyObject *args)
{
int err;
if (!PyArg_ParseTuple(args, ""))
return NULL;
err = snd_mixer_class_register(pymixer->class, pymixer->mixer);
if (err < 0) {
PyErr_Format(PyExc_RuntimeError, "Cannot register mixer: %s", snd_strerror(err));
return NULL;
}
Py_RETURN_NONE;
}
static PyObject *
pymixer_melement_new(struct pymixer *pymixer, PyObject *args)
{
PyObject *obj, *obj1, *obj2;
char *class, *name;
long index, weight;
if (!PyArg_ParseTuple(args, "ssii", &class, &name, &index, &weight))
return NULL;
obj = PyDict_GetItemString(pymixer->mdict, class);
if (obj) {
obj1 = PyTuple_New(4);
if (PyTuple_SET_ITEM(obj1, 0, (PyObject *)pymixer))
Py_INCREF((PyObject *)pymixer);
PyTuple_SET_ITEM(obj1, 1, PyString_FromString(name));
PyTuple_SET_ITEM(obj1, 2, PyInt_FromLong(index));
PyTuple_SET_ITEM(obj1, 3, PyInt_FromLong(weight));
obj2 = PyObject_CallObject(obj, obj1);
Py_XDECREF(obj1);
if (obj2) {
struct pymelem *pymelem = (struct pymelem *)obj2;
void **melems = realloc(pymixer->melem, sizeof(void *) * (pymixer->melem_count + 1) * 2);
if (melems == NULL) {
Py_DECREF(obj2);
return NULL;
}
melems[pymixer->melem_count*2] = pymelem->melem;
melems[pymixer->melem_count*2+1] = obj2;
Py_INCREF(obj2);
pymixer->melem = melems;
pymixer->melem_count++;
}
} else {
PyErr_Format(PyExc_RuntimeError, "Cannot find class '%s'", class);
return NULL;
}
return obj2;
}
static PyObject *
pymixer_melement_add(struct pymixer *pymixer, PyObject *args)
{
PyObject *obj;
struct pymelem *pymelem;
int err;
if (!PyArg_ParseTuple(args, "O", &obj))
return NULL;
pymelem = (struct pymelem *)obj;
err = snd_mixer_elem_add(pymelem->melem, pymixer->class);
if (err < 0) {
PyErr_Format(PyExc_RuntimeError, "Cannot add mixer element: %s", snd_strerror(err));
return NULL;
}
Py_RETURN_NONE;
}
static int
pymixer_init(struct pymixer *pymixer, PyObject *args, PyObject *kwds ATTRIBUTE_UNUSED)
{
long class, mixer;
if (!PyArg_ParseTuple(args, "iiO", &class, &mixer, &pymixer->mdict))
return -1;
pymixer->class = (snd_mixer_class_t *)class;
pymixer->mixer = (snd_mixer_t *)mixer;
pymixer->hctl_count = 0;
pymixer->hctl = NULL;
pymixer->helem_count = 0;
pymixer->helem = NULL;
pymixer->melem_count = 0;
pymixer->melem = NULL;
return 0;
}
static void
pymixer_free(struct pymixer *self)
{
int idx;
for (idx = 0; idx < self->hctl_count; idx++) {
snd_mixer_detach_hctl(self->mixer, self->hctl[idx*2]);
Py_DECREF((PyObject *)self->hctl[idx*2+1]);
}
if (self->hctl)
free(self->hctl);
self->hctl_count = 0;
self->hctl = NULL;
for (idx = 0; idx < self->helem_count; idx++)
Py_DECREF((PyObject *)self->helem[idx*2+1]);
if (self->helem)
free(self->helem);
self->helem_count = 0;
self->helem = NULL;
for (idx = 0; idx < self->melem_count; idx++)
Py_DECREF((PyObject *)self->melem[idx*2+1]);
if (self->melem)
free(self->melem);
self->melem_count = 0;
self->melem = NULL;
}
static void
pymixer_dealloc(struct pymixer *self)
{
pymixer_free(self);
self->ob_type->tp_free(self);
}
static PyGetSetDef pymixer_getseters[] = {
{NULL,NULL,NULL,NULL,NULL}
};
static PyMethodDef pymixer_methods[] = {
{"attachHCtl", (PyCFunction)pymixer_attach_hctl, METH_VARARGS, NULL},
{"register", (PyCFunction)pymixer_register, METH_VARARGS, NULL},
{"newMElement", (PyCFunction)pymixer_melement_new, METH_VARARGS, NULL},
{"addMElement", (PyCFunction)pymixer_melement_add, METH_VARARGS, NULL},
{NULL,NULL,0,NULL}
};
static PyTypeObject pymixer_type = {
PyObject_HEAD_INIT(0)
tp_name: "smixer_python.InternalMixer",
tp_basicsize: sizeof(struct pymixer),
tp_dealloc: (destructor)pymixer_dealloc,
tp_flags: Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE,
tp_doc: NULL /* mixerinit__doc__ */,
tp_getset: pymixer_getseters,
tp_init: (initproc)pymixer_init,
tp_alloc: PyType_GenericAlloc,
tp_new: PyType_GenericNew,
tp_free: PyObject_Del,
tp_methods: pymixer_methods,
};
static PyMethodDef python_methods[] = {
{NULL, NULL, 0, NULL}
};
static PyObject *new_helem(struct python_priv *priv, snd_hctl_elem_t *helem)
{
PyObject *obj, *py_hctl = NULL, *obj1, *obj2;
snd_hctl_t *hctl = snd_hctl_elem_get_hctl(helem);
struct pymixer *pymixer = (struct pymixer *)priv->py_mixer;
int idx;
for (idx = 0; idx < pymixer->hctl_count; idx++) {
if (pymixer->hctl[idx] == hctl) {
py_hctl = pymixer->hctl[idx*2+1];
break;
}
}
if (py_hctl == NULL)
return NULL;
obj = PyDict_GetItemString(priv->py_mdict, "HElement");
if (obj) {
obj1 = PyTuple_New(3);
if (PyTuple_SET_ITEM(obj1, 0, py_hctl))
Py_INCREF(py_hctl);
PyTuple_SET_ITEM(obj1, 1, PyFloat_FromDouble(1));
PyTuple_SET_ITEM(obj1, 2, PyInt_FromLong((long)helem));
obj2 = PyObject_CallObject(obj, obj1);
if (obj2 == NULL) {
PyErr_Print();
PyErr_Clear();
}
Py_XDECREF(obj1);
} else {
SNDERR("Unable to create InternalMixer object");
return NULL;
}
if (obj2) {
struct pymixer *pymixer = (struct pymixer *)priv->py_mixer;
void **helems = realloc(pymixer->helem, sizeof(void *) * (pymixer->helem_count + 1) * 2);
if (helems == NULL) {
Py_DECREF(obj2);
return NULL;
}
helems[pymixer->helem_count*2] = helem;
helems[pymixer->helem_count*2+1] = obj2;
Py_INCREF(obj2);
pymixer->helem = helems;
pymixer->helem_count++;
}
return obj2;
}
static PyObject *find_helem(struct python_priv *priv, snd_hctl_elem_t *helem)
{
struct pymixer *pymixer = (struct pymixer *)priv->py_mixer;
int idx;
for (idx = 0; idx < pymixer->helem_count; idx++) {
if (pymixer->helem[idx*2] == helem)
return (PyObject *)pymixer->helem[idx*2+1];
}
return NULL;
}
static PyObject *find_melem(struct python_priv *priv, snd_mixer_elem_t *melem)
{
struct pymixer *pymixer = (struct pymixer *)priv->py_mixer;
int idx;
for (idx = 0; idx < pymixer->melem_count; idx++) {
if (pymixer->melem[idx*2] == melem)
return (PyObject *)pymixer->melem[idx*2+1];
}
return NULL;
}
int alsa_mixer_simple_event(snd_mixer_class_t *class, unsigned int mask,
snd_hctl_elem_t *helem, snd_mixer_elem_t *melem)
{
struct python_priv *priv = snd_mixer_sbasic_get_private(class);
PyThreadState *tstate, *origstate;
PyObject *t, *o, *r;
int res = -ENOMEM;
tstate = PyThreadState_New(main_interpreter);
origstate = PyThreadState_Swap(tstate);
t = PyTuple_New(3);
if (t) {
PyTuple_SET_ITEM(t, 0, (PyObject *)PyInt_FromLong(mask));
o = find_helem(priv, helem);
if (mask & SND_CTL_EVENT_MASK_ADD) {
if (o == NULL)
o = new_helem(priv, helem);
}
if (o == NULL)
return 0;
if (PyTuple_SET_ITEM(t, 1, o))
Py_INCREF(o);
o = melem ? find_melem(priv, melem) : Py_None;
if (PyTuple_SET_ITEM(t, 2, o))
Py_INCREF(o);
r = PyObject_CallObject(priv->py_event_func, t);
Py_DECREF(t);
if (r) {
if (PyInt_Check(r)) {
res = PyInt_AsLong(r);
} else if (r == Py_None) {
res = 0;
}
Py_DECREF(r);
} else {
PyErr_Print();
PyErr_Clear();
res = -EIO;
}
}
return res;
}
static void alsa_mixer_simple_free(snd_mixer_class_t *class)
{
struct python_priv *priv = snd_mixer_sbasic_get_private(class);
if (priv->py_mixer) {
pymixer_free((struct pymixer *)priv->py_mixer);
Py_DECREF(priv->py_mixer);
}
if (priv->py_initialized) {
Py_XDECREF(priv->py_event_func);
Py_Finalize();
}
free(priv);
}
int alsa_mixer_simple_finit(snd_mixer_class_t *class,
snd_mixer_t *mixer,
const char *device)
{
struct python_priv *priv;
FILE *fp;
const char *file;
PyObject *obj, *obj1, *obj2, *py_mod, *mdict;
priv = calloc(1, sizeof(*priv));
if (priv == NULL)
return -ENOMEM;
snd_mixer_sbasic_set_private(class, priv);
snd_mixer_sbasic_set_private_free(class, alsa_mixer_simple_free);
file = getenv("ALSA_MIXER_SIMPLE_MPYTHON");
if (file == NULL)
file = SCRIPT;
fp = fopen(file, "r");
if (fp == NULL) {
SNDERR("Unable to find python module '%s'", file);
return -ENODEV;
}
Py_Initialize();
if (PyType_Ready(&pymelem_type) < 0)
return -EIO;
if (PyType_Ready(&pymixer_type) < 0)
return -EIO;
Py_InitModule("smixer_python", python_methods);
priv->py_initialized = 1;
main_interpreter = PyThreadState_Get()->interp;
obj = PyImport_GetModuleDict();
py_mod = PyDict_GetItemString(obj, "__main__");
if (py_mod) {
mdict = priv->py_mdict = PyModule_GetDict(py_mod);
obj = PyString_FromString(file);
if (obj)
PyDict_SetItemString(mdict, "__file__", obj);
Py_XDECREF(obj);
obj = PyString_FromString(device);
if (obj)
PyDict_SetItemString(mdict, "device", obj);
Py_XDECREF(obj);
Py_INCREF(&pymixer_type);
PyModule_AddObject(py_mod, "InternalMElement", (PyObject *)&pymelem_type);
PyModule_AddObject(py_mod, "InternalMixer", (PyObject *)&pymixer_type);
obj = PyDict_GetItemString(mdict, "InternalMixer");
if (obj) {
obj1 = PyTuple_New(3);
PyTuple_SET_ITEM(obj1, 0, PyInt_FromLong((long)class));
PyTuple_SET_ITEM(obj1, 1, PyInt_FromLong((long)mixer));
if (PyTuple_SET_ITEM(obj1, 2, mdict))
Py_INCREF(mdict);
obj2 = PyObject_CallObject(obj, obj1);
Py_XDECREF(obj1);
PyDict_SetItemString(mdict, "mixer", obj2);
priv->py_mixer = obj2;
} else {
SNDERR("Unable to create InternalMixer object");
return -EIO;
}
obj = PyRun_FileEx(fp, file, Py_file_input, mdict, mdict, 1);
if (obj == NULL)
PyErr_Print();
Py_XDECREF(obj);
priv->py_event_func = PyDict_GetItemString(mdict, "event");
if (priv->py_event_func == NULL) {
SNDERR("Unable to find python function 'event'");
return -EIO;
}
}
return 0;
}
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