source: python/ext/py-sink.c @ 569b363

feature/autosinkfeature/constantqfeature/pitchshiftfeature/pydocstringsfeature/timestretchpitchshiftsamplertimestretchyinfft+
Last change on this file since 569b363 was 569b363, checked in by Paul Brossier <piem@piem.org>, 6 years ago

python/ext: simplify memory allocations, removed unneeded malloc/free calls

  • Property mode set to 100644
File size: 5.4 KB
Line 
1#include "aubio-types.h"
2
3typedef struct
4{
5  PyObject_HEAD
6  aubio_sink_t * o;
7  char_t* uri;
8  uint_t samplerate;
9  uint_t channels;
10  fvec_t write_data;
11  fmat_t mwrite_data;
12} Py_sink;
13
14static char Py_sink_doc[] = ""
15"  __new__(path, samplerate = 44100, channels = 1)\n"
16"\n"
17"      Create a new sink, opening the given path for writing.\n"
18"\n"
19"      Examples\n"
20"      --------\n"
21"\n"
22"      Create a new sink at 44100Hz, mono:\n"
23"\n"
24"      >>> sink('/tmp/t.wav')\n"
25"\n"
26"      Create a new sink at 8000Hz, mono:\n"
27"\n"
28"      >>> sink('/tmp/t.wav', samplerate = 8000)\n"
29"\n"
30"      Create a new sink at 32000Hz, stereo:\n"
31"\n"
32"      >>> sink('/tmp/t.wav', samplerate = 32000, channels = 2)\n"
33"\n"
34"      Create a new sink at 32000Hz, 5 channels:\n"
35"\n"
36"      >>> sink('/tmp/t.wav', channels = 5, samplerate = 32000)\n"
37"\n"
38"  __call__(vec, write)\n"
39"      x(vec,write) <==> x.do(vec, write)\n"
40"\n"
41"      Write vector to sink.\n"
42"\n"
43"      See also\n"
44"      --------\n"
45"      aubio.sink.do\n"
46"\n";
47
48static char Py_sink_do_doc[] = ""
49"x.do(vec, write) <==> x(vec, write)\n"
50"\n"
51"write monophonic vector to sink";
52
53static char Py_sink_do_multi_doc[] = ""
54"x.do_multi(mat, write)\n"
55"\n"
56"write polyphonic vector to sink";
57
58static char Py_sink_close_doc[] = ""
59"x.close()\n"
60"\n"
61"close this sink now";
62
63static PyObject *
64Py_sink_new (PyTypeObject * pytype, PyObject * args, PyObject * kwds)
65{
66  Py_sink *self;
67  char_t* uri = NULL;
68  uint_t samplerate = 0;
69  uint_t channels = 0;
70  static char *kwlist[] = { "uri", "samplerate", "channels", NULL };
71
72  if (!PyArg_ParseTupleAndKeywords (args, kwds, "|sII", kwlist,
73          &uri, &samplerate, &channels)) {
74    return NULL;
75  }
76
77  self = (Py_sink *) pytype->tp_alloc (pytype, 0);
78
79  if (self == NULL) {
80    return NULL;
81  }
82
83  self->uri = "none";
84  if (uri != NULL) {
85    self->uri = uri;
86  }
87
88  self->samplerate = Py_aubio_default_samplerate;
89  if ((sint_t)samplerate > 0) {
90    self->samplerate = samplerate;
91  } else if ((sint_t)samplerate < 0) {
92    PyErr_SetString (PyExc_ValueError,
93        "can not use negative value for samplerate");
94    return NULL;
95  }
96
97  self->channels = 1;
98  if ((sint_t)channels > 0) {
99    self->channels = channels;
100  } else if ((sint_t)channels < 0) {
101    PyErr_SetString (PyExc_ValueError,
102        "can not use negative or null value for channels");
103    return NULL;
104  }
105
106  return (PyObject *) self;
107}
108
109static int
110Py_sink_init (Py_sink * self, PyObject * args, PyObject * kwds)
111{
112  if (self->channels == 1) {
113    self->o = new_aubio_sink ( self->uri, self->samplerate );
114  } else {
115    self->o = new_aubio_sink ( self->uri, 0 );
116    aubio_sink_preset_channels ( self->o, self->channels );
117    aubio_sink_preset_samplerate ( self->o, self->samplerate );
118  }
119  if (self->o == NULL) {
120    PyErr_SetString (PyExc_RuntimeError, "error creating sink with this uri");
121    return -1;
122  }
123  self->samplerate = aubio_sink_get_samplerate ( self->o );
124  self->channels = aubio_sink_get_channels ( self->o );
125
126  return 0;
127}
128
129static void
130Py_sink_del (Py_sink *self, PyObject *unused)
131{
132  del_aubio_sink(self->o);
133  free(self->mwrite_data.data);
134  Py_TYPE(self)->tp_free((PyObject *) self);
135}
136
137/* function Py_sink_do */
138static PyObject *
139Py_sink_do(Py_sink * self, PyObject * args)
140{
141  /* input vectors python prototypes */
142  PyObject * write_data_obj;
143
144  /* input vectors prototypes */
145  uint_t write;
146
147
148  if (!PyArg_ParseTuple (args, "OI", &write_data_obj, &write)) {
149    return NULL;
150  }
151
152  /* input vectors parsing */
153  if (!PyAubio_ArrayToCFvec(write_data_obj, &(self->write_data))) {
154    return NULL;
155  }
156
157
158  /* compute _do function */
159  aubio_sink_do (self->o, &(self->write_data), write);
160
161  Py_RETURN_NONE;
162}
163
164/* function Py_sink_do_multi */
165static PyObject *
166Py_sink_do_multi(Py_sink * self, PyObject * args)
167{
168  /* input vectors python prototypes */
169  PyObject * write_data_obj;
170
171  /* input vectors prototypes */
172  uint_t write;
173
174
175  if (!PyArg_ParseTuple (args, "OI", &write_data_obj, &write)) {
176    return NULL;
177  }
178
179
180  /* input vectors parsing */
181  if (!PyAubio_ArrayToCFmat(write_data_obj, &(self->mwrite_data))) {
182    return NULL;
183  }
184
185  /* compute _do function */
186  aubio_sink_do_multi (self->o, &(self->mwrite_data), write);
187  Py_RETURN_NONE;
188}
189
190static PyMemberDef Py_sink_members[] = {
191  {"uri", T_STRING, offsetof (Py_sink, uri), READONLY,
192    "path at which the sink was created"},
193  {"samplerate", T_INT, offsetof (Py_sink, samplerate), READONLY,
194    "samplerate at which the sink was created"},
195  {"channels", T_INT, offsetof (Py_sink, channels), READONLY,
196    "number of channels with which the sink was created"},
197  { NULL } // sentinel
198};
199
200static PyObject *
201Pyaubio_sink_close (Py_sink *self, PyObject *unused)
202{
203  aubio_sink_close (self->o);
204  Py_RETURN_NONE;
205}
206
207static PyMethodDef Py_sink_methods[] = {
208  {"do", (PyCFunction) Py_sink_do, METH_VARARGS, Py_sink_do_doc},
209  {"do_multi", (PyCFunction) Py_sink_do_multi, METH_VARARGS, Py_sink_do_multi_doc},
210  {"close", (PyCFunction) Pyaubio_sink_close, METH_NOARGS, Py_sink_close_doc},
211  {NULL} /* sentinel */
212};
213
214PyTypeObject Py_sinkType = {
215  PyVarObject_HEAD_INIT (NULL, 0)
216  "aubio.sink",
217  sizeof (Py_sink),
218  0,
219  (destructor) Py_sink_del,
220  0,
221  0,
222  0,
223  0,
224  0,
225  0,
226  0,
227  0,
228  0,
229  (ternaryfunc)Py_sink_do,
230  0,
231  0,
232  0,
233  0,
234  Py_TPFLAGS_DEFAULT,
235  Py_sink_doc,
236  0,
237  0,
238  0,
239  0,
240  0,
241  0,
242  Py_sink_methods,
243  Py_sink_members,
244  0,
245  0,
246  0,
247  0,
248  0,
249  0,
250  (initproc) Py_sink_init,
251  0,
252  Py_sink_new,
253};
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