source: python/ext/py-sink.c @ 81984a7

#include "aubio-types.h"

typedef struct
{
  PyObject_HEAD
  aubio_sink_t * o;
  char_t* uri;
  uint_t samplerate;
  uint_t channels;
  fvec_t write_data;
  fmat_t mwrite_data;
} Py_sink;

static char Py_sink_doc[] = ""
"  __new__(path, samplerate = 44100, channels = 1)\n"
"\n"
"      Create a new sink, opening the given path for writing.\n"
"\n"
"      Examples\n"
"      --------\n"
"\n"
"      Create a new sink at 44100Hz, mono:\n"
"\n"
"      >>> sink('/tmp/t.wav')\n"
"\n"
"      Create a new sink at 8000Hz, mono:\n"
"\n"
"      >>> sink('/tmp/t.wav', samplerate = 8000)\n"
"\n"
"      Create a new sink at 32000Hz, stereo:\n"
"\n"
"      >>> sink('/tmp/t.wav', samplerate = 32000, channels = 2)\n"
"\n"
"      Create a new sink at 32000Hz, 5 channels:\n"
"\n"
"      >>> sink('/tmp/t.wav', channels = 5, samplerate = 32000)\n"
"\n"
"  __call__(vec, write)\n"
"      x(vec,write) <==> x.do(vec, write)\n"
"\n"
"      Write vector to sink.\n"
"\n"
"      See also\n"
"      --------\n"
"      aubio.sink.do\n"
"\n";

static char Py_sink_do_doc[] = ""
"x.do(vec, write) <==> x(vec, write)\n"
"\n"
"write monophonic vector to sink";

static char Py_sink_do_multi_doc[] = ""
"x.do_multi(mat, write)\n"
"\n"
"write polyphonic vector to sink";

static char Py_sink_close_doc[] = ""
"x.close()\n"
"\n"
"close this sink now";

static PyObject *
Py_sink_new (PyTypeObject * pytype, PyObject * args, PyObject * kwds)
{
  Py_sink *self;
  char_t* uri = NULL;
  uint_t samplerate = 0;
  uint_t channels = 0;
  static char *kwlist[] = { "uri", "samplerate", "channels", NULL };

  if (!PyArg_ParseTupleAndKeywords (args, kwds, "|sII", kwlist,
          &uri, &samplerate, &channels)) {
    return NULL;
  }

  self = (Py_sink *) pytype->tp_alloc (pytype, 0);

  if (self == NULL) {
    return NULL;
  }

  self->uri = "none";
  if (uri != NULL) {
    self->uri = uri;
  }

  self->samplerate = Py_aubio_default_samplerate;
  if ((sint_t)samplerate > 0) {
    self->samplerate = samplerate;
  } else if ((sint_t)samplerate < 0) {
    PyErr_SetString (PyExc_ValueError,
        "can not use negative value for samplerate");
    return NULL;
  }

  self->channels = 1;
  if ((sint_t)channels > 0) {
    self->channels = channels;
  } else if ((sint_t)channels < 0) {
    PyErr_SetString (PyExc_ValueError,
        "can not use negative or null value for channels");
    return NULL;
  }

  return (PyObject *) self;
}

static int
Py_sink_init (Py_sink * self, PyObject * args, PyObject * kwds)
{
  if (self->channels == 1) {
    self->o = new_aubio_sink ( self->uri, self->samplerate );
  } else {
    self->o = new_aubio_sink ( self->uri, 0 );
    aubio_sink_preset_channels ( self->o, self->channels );
    aubio_sink_preset_samplerate ( self->o, self->samplerate );
  }
  if (self->o == NULL) {
    PyErr_SetString (PyExc_RuntimeError, "error creating sink with this uri");
    return -1;
  }
  self->samplerate = aubio_sink_get_samplerate ( self->o );
  self->channels = aubio_sink_get_channels ( self->o );

  return 0;
}

static void
Py_sink_del (Py_sink *self, PyObject *unused)
{
  del_aubio_sink(self->o);
  free(self->mwrite_data.data);
  Py_TYPE(self)->tp_free((PyObject *) self);
}

/* function Py_sink_do */
static PyObject *
Py_sink_do(Py_sink * self, PyObject * args)
{
  /* input vectors python prototypes */
  PyObject * write_data_obj;

  /* input vectors prototypes */
  uint_t write;


  if (!PyArg_ParseTuple (args, "OI", &write_data_obj, &write)) {
    return NULL;
  }

  /* input vectors parsing */
  if (!PyAubio_ArrayToCFvec(write_data_obj, &(self->write_data))) {
    return NULL;
  }


  /* compute _do function */
  aubio_sink_do (self->o, &(self->write_data), write);

  Py_RETURN_NONE;
}

/* function Py_sink_do_multi */
static PyObject *
Py_sink_do_multi(Py_sink * self, PyObject * args)
{
  /* input vectors python prototypes */
  PyObject * write_data_obj;

  /* input vectors prototypes */
  uint_t write;


  if (!PyArg_ParseTuple (args, "OI", &write_data_obj, &write)) {
    return NULL;
  }


  /* input vectors parsing */
  if (!PyAubio_ArrayToCFmat(write_data_obj, &(self->mwrite_data))) {
    return NULL;
  }

  /* compute _do function */
  aubio_sink_do_multi (self->o, &(self->mwrite_data), write);
  Py_RETURN_NONE;
}

static PyMemberDef Py_sink_members[] = {
  {"uri", T_STRING, offsetof (Py_sink, uri), READONLY,
    "path at which the sink was created"},
  {"samplerate", T_INT, offsetof (Py_sink, samplerate), READONLY,
    "samplerate at which the sink was created"},
  {"channels", T_INT, offsetof (Py_sink, channels), READONLY,
    "number of channels with which the sink was created"},
  { NULL } // sentinel
};

static PyObject *
Pyaubio_sink_close (Py_sink *self, PyObject *unused)
{
  aubio_sink_close (self->o);
  Py_RETURN_NONE;
}

static PyMethodDef Py_sink_methods[] = {
  {"do", (PyCFunction) Py_sink_do, METH_VARARGS, Py_sink_do_doc},
  {"do_multi", (PyCFunction) Py_sink_do_multi, METH_VARARGS, Py_sink_do_multi_doc},
  {"close", (PyCFunction) Pyaubio_sink_close, METH_NOARGS, Py_sink_close_doc},
  {NULL} /* sentinel */
};

PyTypeObject Py_sinkType = {
  PyVarObject_HEAD_INIT (NULL, 0)
  "aubio.sink",
  sizeof (Py_sink),
  0,
  (destructor) Py_sink_del,
  0,
  0,
  0,
  0,
  0,
  0,
  0,
  0,
  0,
  (ternaryfunc)Py_sink_do,
  0,
  0,
  0,
  0,
  Py_TPFLAGS_DEFAULT,
  Py_sink_doc,
  0,
  0,
  0,
  0,
  0,
  0,
  Py_sink_methods,
  Py_sink_members,
  0,
  0,
  0,
  0,
  0,
  0,
  (initproc) Py_sink_init,
  0,
  Py_sink_new,
};