ref: 0cd37209cc5a5673eb7f19b6bb1d0cc6294c4caa
dir: /doc/py_io.rst/
.. currentmodule:: aubio
.. default-domain:: py
Input/Output
------------
This section contains the documentation for two classes:
:class:`source`, to read audio samples from files, and :class:`sink`,
to write audio samples to disk.
.. defined in `python/ext`
..
Note: __call__ docstrings of objects defined in C must be written
specifically in RST, since there is no known way to add them to
their C implementation.
..
TODO: remove special-members documentation
.. defined in py-source.c
.. autoclass:: source
:members:
:special-members: __enter__
:no-special-members:
.. function:: __call__()
Read at most `hop_size` new samples from self, return them in
a tuple with the number of samples actually read.
The returned tuple contains:
- a vector of shape `(hop_size,)`, filled with the `read` next
samples available, zero-padded if `read < hop_size`
- `read`, an integer indicating the number of samples read
If opened with more than one channel, the frames will be
down-mixed to produce the new samples.
:returns: A tuple of one array of samples and one integer.
:rtype: (array, int)
.. seealso:: :meth:`__next__`
.. rubric:: Example
>>> src = aubio.source('stereo.wav')
>>> while True:
... samples, read = src()
... if read < src.hop_size:
... break
.. function:: __next__()
Read at most `hop_size` new frames from self, return them in
an array.
If source was opened with one channel, next(self) returns
an array of shape `(read,)`, where `read` is the actual
number of frames read (`0 <= read <= hop_size`).
If `source` was opened with more then one channel, the
returned arrays will be of shape `(channels, read)`, where
`read` is the actual number of frames read (`0 <= read <=
hop_size`).
:return: A tuple of one array of frames and one integer.
:rtype: (array, int)
.. seealso:: :meth:`__call__`
.. rubric:: Example
>>> for frames in aubio.source('song.flac')
... print(samples.shape)
.. function:: __iter__()
Implement iter(self).
.. seealso:: :meth:`__next__`
.. function:: __enter__()
Implement context manager interface. The file will be opened
upon entering the context. See `with` statement.
.. rubric:: Example
>>> with aubio.source('loop.ogg') as src:
... src.uri, src.samplerate, src.channels
.. function:: __exit__()
Implement context manager interface. The file will be closed
before exiting the context. See `with` statement.
.. seealso:: :meth:`__enter__`
.. py-sink.c
TODO: remove special-members documentation
.. autoclass:: aubio.sink
:members:
.. function:: __call__(vec, length)
Write `length` samples from `vec`.
:param array vec: input vector to write from
:param int length: number of samples to write
:example:
>>> with aubio.sink('foo.wav') as snk:
... snk(aubio.fvec(1025), 1025)