jack_mixer_c.c

   1 /*
   2  * This file is part of jack_mixer
   3  *
   4  * Copyright (C) 2009 Frederic Peters <fpeters@0d.be>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; version 2 of the License
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  */
  19
  20 #include <Python.h>
  21
  22 #include <stdlib.h>
  23 #include <string.h>
  24 #include <stdbool.h>
  25
  26 #include <structmember.h>
  27
  28 #include "jack_mixer.h"
  29
  30
  31 /** Scale Type **/
  32
  33 typedef struct {
  34         PyObject_HEAD
  35         jack_mixer_scale_t scale;
  36 } ScaleObject;
  37
  38 static void
  39 Scale_dealloc(ScaleObject *self)
  40 {
  41         if (self->scale)
  42                 scale_destroy(self->scale);
  43         self->ob_type->tp_free((PyObject*)self);
  44 }
  45
  46 static int
  47 Scale_init(ScaleObject *self, PyObject *args, PyObject *kwds)
  48 {
  49         self->scale = scale_create();
  50         return 0;
  51 }
  52
  53 static PyObject*
  54 Scale_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
  55 {
  56         ScaleObject *self;
  57
  58         self = (ScaleObject*)type->tp_alloc(type, 0);
  59
  60         return (PyObject*)self;
  61 }
  62
  63 static PyObject*
  64 Scale_add_threshold(ScaleObject *self, PyObject *args)
  65 {
  66         float db, scale_value;
  67
  68         if (! PyArg_ParseTuple(args, "ff", &db, &scale_value)) return NULL;
  69
  70         scale_add_threshold(self->scale, db, scale_value);
  71
  72         Py_INCREF(Py_None);
  73         return Py_None;
  74 }
  75
  76 static PyObject*
  77 Scale_calculate_coefficients(ScaleObject *self, PyObject *args)
  78 {
  79         if (! PyArg_ParseTuple(args, "")) return NULL;
  80         scale_calculate_coefficients(self->scale);
  81         Py_INCREF(Py_None);
  82         return Py_None;
  83 }
  84
  85 static PyObject*
  86 Scale_db_to_scale(ScaleObject *self, PyObject *args)
  87 {
  88         double db;
  89         if (! PyArg_ParseTuple(args, "d", &db)) return NULL;
  90         return PyFloat_FromDouble(scale_db_to_scale(self->scale, db));
  91 }
  92
  93 static PyObject*
  94 Scale_scale_to_db(ScaleObject *self, PyObject *args)
  95 {
  96         double scale_value;
  97         if (! PyArg_ParseTuple(args, "d", &scale_value)) return NULL;
  98         return PyFloat_FromDouble(scale_scale_to_db(self->scale, scale_value));
  99 }
 100
 101 static PyMethodDef Scale_methods[] = {
 102         {"add_threshold", (PyCFunction)Scale_add_threshold, METH_VARARGS, "Add threshold"},
 103         {"calculate_coefficients", (PyCFunction)Scale_calculate_coefficients,
 104                 METH_VARARGS, "Calculate coefficients"},
 105         {"db_to_scale", (PyCFunction)Scale_db_to_scale, METH_VARARGS, "dB to scale"},
 106         {"scale_to_db", (PyCFunction)Scale_scale_to_db, METH_VARARGS, "scale to dB"},
 107         {NULL}
 108 };
 109
 110 static PyTypeObject ScaleType = {
 111         PyObject_HEAD_INIT(NULL)
 112         0,       /*ob_size*/
 113         "jack_mixer_c.Scale",    /*tp_name*/
 114         sizeof(ScaleObject), /*tp_basicsize*/
 115         0,       /*tp_itemsize*/
 116         (destructor)Scale_dealloc,       /*tp_dealloc*/
 117         0,       /*tp_print*/
 118         0,       /*tp_getattr*/
 119         0,       /*tp_setattr*/
 120         0,       /*tp_compare*/
 121         0,       /*tp_repr*/
 122         0,       /*tp_as_number*/
 123         0,       /*tp_as_sequence*/
 124         0,       /*tp_as_mapping*/
 125         0,       /*tp_hash */
 126         0,       /*tp_call*/
 127         0,       /*tp_str*/
 128         0,       /*tp_getattro*/
 129         0,       /*tp_setattro*/
 130         0,       /*tp_as_buffer*/
 131         Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE,  /*tp_flags*/
 132         "Scale objects",           /* tp_doc */
 133         0,                         /* tp_traverse */
 134         0,                         /* tp_clear */
 135         0,                         /* tp_richcompare */
 136         0,                         /* tp_weaklistoffset */
 137         0,                         /* tp_iter */
 138         0,                         /* tp_iternext */
 139         Scale_methods,             /* tp_methods */
 140         0,             /* tp_members */
 141         0,           /* tp_getset */
 142         0,                         /* tp_base */
 143         0,                         /* tp_dict */
 144         0,                         /* tp_descr_get */
 145         0,                         /* tp_descr_set */
 146         0,                         /* tp_dictoffset */
 147         (initproc)Scale_init,      /* tp_init */
 148         0,                         /* tp_alloc */
 149         Scale_new,                 /* tp_new */
 150 };
 151
 152
 153 /** Channel Type **/
 154
 155 typedef struct {
 156         PyObject_HEAD
 157         PyObject *midi_change_callback;
 158         jack_mixer_channel_t channel;
 159 } ChannelObject;
 160
 161 static void
 162 Channel_dealloc(ChannelObject *self)
 163 {
 164         Py_XDECREF(self->midi_change_callback);
 165         self->ob_type->tp_free((PyObject*)self);
 166 }
 167
 168 static int
 169 Channel_init(ChannelObject *self, PyObject *args, PyObject *kwds)
 170 {
 171         self->midi_change_callback = NULL;
 172         return 0;
 173 }
 174
 175 static PyObject*
 176 Channel_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
 177 {
 178         ChannelObject *self;
 179
 180         self = (ChannelObject*)type->tp_alloc(type, 0);
 181
 182         if (self != NULL) {
 183                 self->channel = NULL;
 184                 self->midi_change_callback = NULL;
 185         }
 186
 187         return (PyObject*)self;
 188 }
 189
 190 static PyObject*
 191 Channel_get_is_stereo(ChannelObject *self, void *closure)
 192 {
 193         PyObject *result;
 194
 195         bool is_stereo = channel_is_stereo(self->channel);
 196         if (is_stereo) {
 197                 result = Py_True;
 198         } else {
 199                 result = Py_False;
 200         }
 201         Py_INCREF(result);
 202         return result;
 203 }
 204
 205 static PyObject*
 206 Channel_get_volume(ChannelObject *self, void *closure)
 207 {
 208         return PyFloat_FromDouble(channel_volume_read(self->channel));
 209 }
 210
 211 static int
 212 Channel_set_volume(ChannelObject *self, PyObject *value, void *closure)
 213 {
 214         channel_volume_write(self->channel, PyFloat_AsDouble(value));
 215         return 0;
 216 }
 217
 218 static PyObject*
 219 Channel_get_balance(ChannelObject *self, void *closure)
 220 {
 221         return PyFloat_FromDouble(channel_balance_read(self->channel));
 222 }
 223
 224 static int
 225 Channel_set_balance(ChannelObject *self, PyObject *value, void *closure)
 226 {
 227         channel_balance_write(self->channel, PyFloat_AsDouble(value));
 228         return 0;
 229 }
 230
 231 static PyObject*
 232 Channel_get_mute(ChannelObject *self, void *closure)
 233 {
 234         PyObject *result;
 235
 236         if (channel_is_muted(self->channel)) {
 237                 result = Py_True;
 238         } else {
 239                 result = Py_False;
 240         }
 241         Py_INCREF(result);
 242         return result;
 243 }
 244
 245 static int
 246 Channel_set_mute(ChannelObject *self, PyObject *value, void *closure)
 247 {
 248         if (value == Py_True) {
 249                 channel_mute(self->channel);
 250         } else {
 251                 channel_unmute(self->channel);
 252         }
 253         return 0;
 254 }
 255
 256 static PyObject*
 257 Channel_get_solo(ChannelObject *self, void *closure)
 258 {
 259         PyObject *result;
 260
 261         if (channel_is_soloed(self->channel)) {
 262                 result = Py_True;
 263         } else {
 264                 result = Py_False;
 265         }
 266         Py_INCREF(result);
 267         return result;
 268 }
 269
 270 static int
 271 Channel_set_solo(ChannelObject *self, PyObject *value, void *closure)
 272 {
 273         if (value == Py_True) {
 274                 channel_solo(self->channel);
 275         } else {
 276                 channel_unsolo(self->channel);
 277         }
 278         return 0;
 279 }
 280
 281 static PyObject*
 282 Channel_get_meter(ChannelObject *self, void *closure)
 283 {
 284         PyObject *result;
 285         double left, right;
 286
 287         if (channel_is_stereo(self->channel)) {
 288                 result = PyTuple_New(2);
 289                 channel_stereo_meter_read(self->channel, &left, &right);
 290                 PyTuple_SetItem(result, 0, PyFloat_FromDouble(left));
 291                 PyTuple_SetItem(result, 1, PyFloat_FromDouble(right));
 292         } else {
 293                 result = PyTuple_New(1);
 294                 channel_mono_meter_read(self->channel, &left);
 295                 PyTuple_SetItem(result, 0, PyFloat_FromDouble(left));
 296         }
 297         return result;
 298 }
 299
 300 static PyObject*
 301 Channel_get_abspeak(ChannelObject *self, void *closure)
 302 {
 303         return PyFloat_FromDouble(channel_abspeak_read(self->channel));
 304 }
 305
 306 static int
 307 Channel_set_abspeak(ChannelObject *self, PyObject *value, void *closure)
 308 {
 309         if (value != Py_None) {
 310                 fprintf(stderr, "abspeak can only be reset (set to None)\n");
 311                 return -1;
 312         }
 313         channel_abspeak_reset(self->channel);
 314         return 0;
 315 }
 316
 317 static int
 318 Channel_set_midi_scale(ChannelObject *self, PyObject *value, void *closure)
 319 {
 320         ScaleObject *scale_object = (ScaleObject*)value; /* XXX: check */
 321
 322         channel_set_midi_scale(self->channel, scale_object->scale);
 323         return 0;
 324 }
 325
 326
 327 static PyObject*
 328 Channel_get_midi_change_callback(ChannelObject *self, void *closure)
 329 {
 330         if (self->midi_change_callback) {
 331                 Py_INCREF(self->midi_change_callback);
 332                 return self->midi_change_callback;
 333         } else {
 334                 Py_INCREF(Py_None);
 335                 return Py_None;
 336         }
 337 }
 338
 339 static void
 340 channel_midi_callback(void *userdata)
 341 {
 342         ChannelObject *self = (ChannelObject*)userdata;
 343         PyGILState_STATE gstate;
 344
 345         gstate = PyGILState_Ensure();
 346         PyObject_CallObject(self->midi_change_callback, NULL);
 347         PyGILState_Release(gstate);
 348 }
 349
 350 static int
 351 Channel_set_midi_change_callback(ChannelObject *self, PyObject *value, void *closure)
 352 {
 353         if (value == Py_None) {
 354                 self->midi_change_callback = NULL;
 355                 channel_set_midi_change_callback(self->channel, NULL, NULL);
 356         } else {
 357                 if (!PyCallable_Check(value)) {
 358                         PyErr_SetString(PyExc_TypeError, "value must be callable");
 359                         return -1;
 360                 }
 361                 if (self->midi_change_callback) {
 362                         Py_XDECREF(self->midi_change_callback);
 363                 }
 364                 Py_INCREF(value);
 365                 self->midi_change_callback = value;
 366                 channel_set_midi_change_callback(self->channel,
 367                                 channel_midi_callback, self);
 368         }
 369
 370         return 0;
 371 }
 372
 373 static PyObject*
 374 Channel_get_name(ChannelObject *self, void *closure)
 375 {
 376         return PyString_FromString(channel_get_name(self->channel));
 377 }
 378
 379 static int
 380 Channel_set_name(ChannelObject *self, PyObject *value, void *closure)
 381 {
 382         channel_rename(self->channel, PyString_AsString(value));
 383         return 0;
 384 }
 385
 386 static PyObject*
 387 Channel_get_balance_midi_cc(ChannelObject *self, void *closure)
 388 {
 389         return PyInt_FromLong(channel_get_balance_midi_cc(self->channel));
 390 }
 391
 392 static int
 393 Channel_set_balance_midi_cc(ChannelObject *self, PyObject *value, void *closure)
 394 {
 395         unsigned int new_cc;
 396         unsigned int result;
 397
 398         new_cc = PyInt_AsLong(value);
 399         result = channel_set_balance_midi_cc(self->channel, new_cc);
 400         if (result == 0) {
 401                 return 0;
 402         }
 403         if (result == 1) {
 404                 PyErr_SetString(PyExc_RuntimeError, "value already in use");
 405         } else if (result == 2) {
 406                 PyErr_SetString(PyExc_RuntimeError, "value out of range");
 407         }
 408         return -1;
 409 }
 410
 411 static PyObject*
 412 Channel_get_volume_midi_cc(ChannelObject *self, void *closure)
 413 {
 414         return PyInt_FromLong(channel_get_volume_midi_cc(self->channel));
 415 }
 416
 417 static int
 418 Channel_set_volume_midi_cc(ChannelObject *self, PyObject *value, void *closure)
 419 {
 420         unsigned int new_cc;
 421         unsigned int result;
 422
 423         new_cc = PyInt_AsLong(value);
 424         result = channel_set_volume_midi_cc(self->channel, new_cc);
 425         if (result == 0) {
 426                 return 0;
 427         }
 428         if (result == 1) {
 429                 PyErr_SetString(PyExc_RuntimeError, "value already in use");
 430         } else if (result == 2) {
 431                 PyErr_SetString(PyExc_RuntimeError, "value out of range");
 432         }
 433         return -1;
 434 }
 435
 436 static PyGetSetDef Channel_getseters[] = {
 437         {"is_stereo",
 438                 (getter)Channel_get_is_stereo, NULL,
 439                 "mono/stereo", NULL},
 440         {"volume",
 441                 (getter)Channel_get_volume, (setter)Channel_set_volume,
 442                 "volume", NULL},
 443         {"balance",
 444                 (getter)Channel_get_balance, (setter)Channel_set_balance,
 445                 "balance", NULL},
 446         {"mute",
 447                 (getter)Channel_get_mute, (setter)Channel_set_mute,
 448                 "mute", NULL},
 449         {"solo",
 450                 (getter)Channel_get_solo, (setter)Channel_set_solo,
 451                 "solo", NULL},
 452         {"meter",
 453                 (getter)Channel_get_meter, NULL,
 454                 "meter", NULL},
 455         {"abspeak",
 456                 (getter)Channel_get_abspeak, (setter)Channel_set_abspeak,
 457                 "balance", NULL},
 458         {"midi_scale",
 459                 NULL, (setter)Channel_set_midi_scale,
 460                 "midi scale", NULL},
 461         {"midi_change_callback",
 462                 (getter)Channel_get_midi_change_callback,
 463                 (setter)Channel_set_midi_change_callback,
 464                 "midi change callback", NULL},
 465         {"name",
 466                 (getter)Channel_get_name,
 467                 (setter)Channel_set_name,
 468                 "name", NULL},
 469         {"balance_midi_cc",
 470                 (getter)Channel_get_balance_midi_cc,
 471                 (setter)Channel_set_balance_midi_cc,
 472                 "Balance MIDI CC", NULL},
 473         {"volume_midi_cc",
 474                 (getter)Channel_get_volume_midi_cc,
 475                 (setter)Channel_set_volume_midi_cc,
 476                 "Volume MIDI CC", NULL},
 477         {NULL}
 478 };
 479
 480 static PyObject*
 481 Channel_remove(ChannelObject *self, PyObject *args)
 482 {
 483         if (! PyArg_ParseTuple(args, "")) return NULL;
 484         remove_channel(self->channel);
 485         Py_INCREF(Py_None);
 486         return Py_None;
 487 }
 488
 489 static PyObject*
 490 Channel_autoset_midi_cc(ChannelObject *self, PyObject *args)
 491 {
 492         if (! PyArg_ParseTuple(args, "")) return NULL;
 493         channel_autoset_midi_cc(self->channel);
 494         Py_INCREF(Py_None);
 495         return Py_None;
 496 }
 497
 498 static PyMethodDef channel_methods[] = {
 499         {"remove", (PyCFunction)Channel_remove, METH_VARARGS, "Remove"},
 500         {"autoset_midi_cc", (PyCFunction)Channel_autoset_midi_cc, METH_VARARGS, "Autoset MIDI CC"},
 501         {NULL}
 502 };
 503
 504 static PyTypeObject ChannelType = {
 505         PyObject_HEAD_INIT(NULL)
 506         0,       /*ob_size*/
 507         "jack_mixer_c.Channel",    /*tp_name*/
 508         sizeof(ChannelObject), /*tp_basicsize*/
 509         0,       /*tp_itemsize*/
 510         (destructor)Channel_dealloc,       /*tp_dealloc*/
 511         0,       /*tp_print*/
 512         0,       /*tp_getattr*/
 513         0,       /*tp_setattr*/
 514         0,       /*tp_compare*/
 515         0,       /*tp_repr*/
 516         0,       /*tp_as_number*/
 517         0,       /*tp_as_sequence*/
 518         0,       /*tp_as_mapping*/
 519         0,       /*tp_hash */
 520         0,       /*tp_call*/
 521         0,       /*tp_str*/
 522         0,       /*tp_getattro*/
 523         0,       /*tp_setattro*/
 524         0,       /*tp_as_buffer*/
 525         Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE,  /*tp_flags*/
 526         "Channel objects",           /* tp_doc */
 527         0,                         /* tp_traverse */
 528         0,                         /* tp_clear */
 529         0,                         /* tp_richcompare */
 530         0,                         /* tp_weaklistoffset */
 531         0,                         /* tp_iter */
 532         0,                         /* tp_iternext */
 533         channel_methods,           /* tp_methods */
 534         0,             /* tp_members */
 535         Channel_getseters,           /* tp_getset */
 536         0,                         /* tp_base */
 537         0,                         /* tp_dict */
 538         0,                         /* tp_descr_get */
 539         0,                         /* tp_descr_set */
 540         0,                         /* tp_dictoffset */
 541         (initproc)Channel_init,    /* tp_init */
 542         0,                         /* tp_alloc */
 543         Channel_new,                 /* tp_new */
 544 };
 545
 546 static PyObject*
 547 Channel_New(jack_mixer_channel_t channel)
 548 {
 549         ChannelObject *self;
 550         self = (ChannelObject*)PyObject_NEW(ChannelObject, &ChannelType);
 551         if (self != NULL) {
 552                 self->channel = channel;
 553                 self->midi_change_callback = NULL;
 554         }
 555         return (PyObject*)self;
 556 }
 557
 558 /** Output Channel Type **/
 559
 560 typedef struct {
 561         PyObject_HEAD
 562         PyObject *midi_change_callback;
 563         jack_mixer_output_channel_t *output_channel;
 564 } OutputChannelObject;
 565
 566 static PyObject*
 567 OutputChannel_remove(OutputChannelObject *self, PyObject *args)
 568 {
 569         if (! PyArg_ParseTuple(args, "")) return NULL;
 570         remove_output_channel(self->output_channel);
 571         Py_INCREF(Py_None);
 572         return Py_None;
 573 }
 574
 575 static PyObject*
 576 OutputChannel_set_solo(OutputChannelObject *self, PyObject *args)
 577 {
 578         PyObject *channel;
 579         int solo;
 580
 581         if (! PyArg_ParseTuple(args, "Ob", &channel, &solo)) return NULL;
 582
 583         output_channel_set_solo(self->output_channel,
 584                         ((ChannelObject*)channel)->channel,
 585                         solo);
 586
 587         Py_INCREF(Py_None);
 588         return Py_None;
 589 }
 590
 591 static PyObject*
 592 OutputChannel_set_muted(OutputChannelObject *self, PyObject *args)
 593 {
 594         PyObject *channel;
 595         int muted;
 596
 597         if (! PyArg_ParseTuple(args, "Ob", &channel, &muted)) return NULL;
 598
 599         output_channel_set_muted(self->output_channel,
 600                         ((ChannelObject*)channel)->channel,
 601                         muted);
 602
 603         Py_INCREF(Py_None);
 604         return Py_None;
 605 }
 606
 607
 608
 609 static PyMethodDef output_channel_methods[] = {
 610         {"remove", (PyCFunction)OutputChannel_remove, METH_VARARGS, "Remove"},
 611         {"set_solo", (PyCFunction)OutputChannel_set_solo, METH_VARARGS, "Set a channel as solo"},
 612         {"set_muted", (PyCFunction)OutputChannel_set_muted, METH_VARARGS, "Set a channel as muted"},
 613         {NULL}
 614 };
 615
 616 static PyTypeObject OutputChannelType = {
 617         PyObject_HEAD_INIT(NULL)
 618         0,       /*ob_size*/
 619         "jack_mixer_c.OutputChannel",    /*tp_name*/
 620         sizeof(OutputChannelObject), /*tp_basicsize*/
 621         0,       /*tp_itemsize*/
 622         0,       /*tp_dealloc*/
 623         0,       /*tp_print*/
 624         0,       /*tp_getattr*/
 625         0,       /*tp_setattr*/
 626         0,       /*tp_compare*/
 627         0,       /*tp_repr*/
 628         0,       /*tp_as_number*/
 629         0,       /*tp_as_sequence*/
 630         0,       /*tp_as_mapping*/
 631         0,       /*tp_hash */
 632         0,       /*tp_call*/
 633         0,       /*tp_str*/
 634         0,       /*tp_getattro*/
 635         0,       /*tp_setattro*/
 636         0,       /*tp_as_buffer*/
 637         Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE,  /*tp_flags*/
 638         "Output Channel objects",           /* tp_doc */
 639         0,                         /* tp_traverse */
 640         0,                         /* tp_clear */
 641         0,                         /* tp_richcompare */
 642         0,                         /* tp_weaklistoffset */
 643         0,                         /* tp_iter */
 644         0,                         /* tp_iternext */
 645         output_channel_methods,    /* tp_methods */
 646         0,             /* tp_members */
 647         0,           /* tp_getset */
 648         &ChannelType,              /* tp_base */
 649         0,                         /* tp_dict */
 650         0,                         /* tp_descr_get */
 651         0,                         /* tp_descr_set */
 652         0,                         /* tp_dictoffset */
 653         0,                         /* tp_init */
 654         0,                         /* tp_alloc */
 655         0,                         /* tp_new */
 656 };
 657
 658 static PyObject*
 659 OutputChannel_New(jack_mixer_output_channel_t output_channel)
 660 {
 661         OutputChannelObject *self;
 662         self = (OutputChannelObject*)PyObject_NEW(OutputChannelObject, &OutputChannelType);
 663         if (self != NULL) {
 664                 self->midi_change_callback = NULL;
 665                 self->output_channel = output_channel;
 666         }
 667         return (PyObject*)self;
 668 }
 669
 670
 671 /** Mixer Type **/
 672
 673 typedef struct {
 674         PyObject_HEAD
 675         PyObject *main_mix_channel;
 676         jack_mixer_t mixer;
 677 } MixerObject;
 678
 679 static void
 680 Mixer_dealloc(MixerObject *self)
 681 {
 682         Py_XDECREF(self->main_mix_channel);
 683         if (self->mixer)
 684                 destroy(self->mixer);
 685         self->ob_type->tp_free((PyObject*)self);
 686 }
 687
 688 static PyObject*
 689 Mixer_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
 690 {
 691         MixerObject *self;
 692
 693         self = (MixerObject*)type->tp_alloc(type, 0);
 694
 695         if (self != NULL) {
 696                 self->main_mix_channel = NULL;
 697                 self->mixer = NULL;
 698         }
 699
 700         return (PyObject*)self;
 701 }
 702
 703 static int
 704 Mixer_init(MixerObject *self, PyObject *args, PyObject *kwds)
 705 {
 706         static char *kwlist[] = {"name", NULL};
 707         char *name;
 708
 709         if (!PyArg_ParseTupleAndKeywords(args, kwds, "s", kwlist, &name))
 710                 return -1;
 711
 712         self->mixer = create(name);
 713         if (self->mixer == NULL) {
 714                 PyErr_SetString(PyExc_RuntimeError,
 715                                 "error creating mixer, probably jack is not running");
 716                 return -1;
 717         }
 718
 719         self->main_mix_channel = Channel_New(get_main_mix_channel(self->mixer));
 720
 721         return 0;
 722 }
 723
 724 static PyMemberDef Mixer_members[] = {
 725         {"main_mix_channel", T_OBJECT, offsetof(MixerObject, main_mix_channel), 0, "main_mix_channel"},
 726         {NULL}
 727 };
 728
 729 static PyObject*
 730 Mixer_get_channels_count(MixerObject *self, void *closure)
 731 {
 732         return PyInt_FromLong(get_channels_count(self->mixer));
 733 }
 734
 735 static PyObject*
 736 Mixer_get_last_midi_channel(MixerObject *self, void *closure)
 737 {
 738         return PyInt_FromLong(get_last_midi_channel(self->mixer));
 739 }
 740
 741
 742 static PyGetSetDef Mixer_getseters[] = {
 743         {"channels_count", (getter)Mixer_get_channels_count, NULL,
 744                 "channels count", NULL},
 745         {"last_midi_channel", (getter)Mixer_get_last_midi_channel, NULL,
 746                 "last midi channel", NULL},
 747         {NULL}
 748 };
 749
 750 static PyObject*
 751 Mixer_add_channel(MixerObject *self, PyObject *args)
 752 {
 753         char *name;
 754         int stereo;
 755         jack_mixer_channel_t channel;
 756
 757         if (! PyArg_ParseTuple(args, "sb", &name, &stereo)) return NULL;
 758
 759         channel = add_channel(self->mixer, name, (bool)stereo);
 760
 761         if (channel == NULL) {
 762                 PyErr_SetString(PyExc_RuntimeError, "error adding channel");
 763                 return NULL;
 764         }
 765
 766         return Channel_New(channel);
 767 }
 768
 769 static PyObject*
 770 Mixer_add_output_channel(MixerObject *self, PyObject *args)
 771 {
 772         char *name;
 773         int stereo = 1;
 774         int system = 0;
 775         jack_mixer_output_channel_t channel;
 776
 777         if (! PyArg_ParseTuple(args, "s|bb", &name, &stereo, &system)) return NULL;
 778
 779         channel = add_output_channel(self->mixer, name, (bool)stereo, (bool)system);
 780
 781         return OutputChannel_New(channel);
 782 }
 783
 784
 785 static PyMethodDef Mixer_methods[] = {
 786         {"add_channel", (PyCFunction)Mixer_add_channel, METH_VARARGS, "Add a new channel"},
 787         {"add_output_channel", (PyCFunction)Mixer_add_output_channel, METH_VARARGS, "Add a new output channel"},
 788 //      {"remove_channel", (PyCFunction)Mixer_remove_channel, METH_VARARGS, "Remove a channel"},
 789         {NULL}
 790 };
 791
 792 static PyTypeObject MixerType = {
 793         PyObject_HEAD_INIT(NULL)
 794         0,       /*ob_size*/
 795         "jack_mixer_c.Mixer",    /*tp_name*/
 796         sizeof(MixerObject), /*tp_basicsize*/
 797         0,       /*tp_itemsize*/
 798         (destructor)Mixer_dealloc,       /*tp_dealloc*/
 799         0,       /*tp_print*/
 800         0,       /*tp_getattr*/
 801         0,       /*tp_setattr*/
 802         0,       /*tp_compare*/
 803         0,       /*tp_repr*/
 804         0,       /*tp_as_number*/
 805         0,       /*tp_as_sequence*/
 806         0,       /*tp_as_mapping*/
 807         0,       /*tp_hash */
 808         0,       /*tp_call*/
 809         0,       /*tp_str*/
 810         0,       /*tp_getattro*/
 811         0,       /*tp_setattro*/
 812         0,       /*tp_as_buffer*/
 813         Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE,  /*tp_flags*/
 814         "Mixer objects",           /* tp_doc */
 815         0,                         /* tp_traverse */
 816         0,                         /* tp_clear */
 817         0,                         /* tp_richcompare */
 818         0,                         /* tp_weaklistoffset */
 819         0,                         /* tp_iter */
 820         0,                         /* tp_iternext */
 821         Mixer_methods,             /* tp_methods */
 822         Mixer_members,             /* tp_members */
 823         Mixer_getseters,           /* tp_getset */
 824         0,                         /* tp_base */
 825         0,                         /* tp_dict */
 826         0,                         /* tp_descr_get */
 827         0,                         /* tp_descr_set */
 828         0,                         /* tp_dictoffset */
 829         (initproc)Mixer_init,      /* tp_init */
 830         0,                         /* tp_alloc */
 831         Mixer_new,                 /* tp_new */
 832 };
 833
 834
 835 static PyMethodDef jack_mixer_methods[] = {
 836         {NULL}  /* Sentinel */
 837 };
 838
 839
 840
 841 PyMODINIT_FUNC initjack_mixer_c(void)
 842 {
 843         PyObject *m;
 844
 845         if (PyType_Ready(&MixerType) < 0)
 846                 return;
 847         if (PyType_Ready(&ChannelType) < 0)
 848                 return;
 849         if (PyType_Ready(&OutputChannelType) < 0)
 850                 return;
 851         if (PyType_Ready(&ScaleType) < 0)
 852                 return;
 853
 854         m = Py_InitModule3("jack_mixer_c", jack_mixer_methods, "Jack Mixer C Helper Module");
 855
 856         Py_INCREF(&MixerType);
 857         PyModule_AddObject(m, "Mixer", (PyObject*)&MixerType);
 858         Py_INCREF(&ChannelType);
 859         PyModule_AddObject(m, "Channel", (PyObject*)&ChannelType);
 860         Py_INCREF(&OutputChannelType);
 861         PyModule_AddObject(m, "OutputChannel", (PyObject*)&OutputChannelType);
 862         Py_INCREF(&ScaleType);
 863         PyModule_AddObject(m, "Scale", (PyObject*)&ScaleType);
 864 }
 865