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Support all essential parameters in alsapcm_new.

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Lars Immisch
2020-07-08 22:39:46 +02:00
parent 8084297926
commit 2a21bf6c42
2 changed files with 21 additions and 13 deletions
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alsaaudio.c
+12 -7
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@@ -423,11 +423,16 @@ alsapcm_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
char *card = NULL;
int cardidx = -1;
char hw_device[128];
char *kw[] = { "type", "mode", "device", "cardindex", "card", NULL };
int rate = 44100;
int channels = 2;
int format = SND_PCM_FORMAT_S16_LE;
int periodsize = 32;
if (!PyArg_ParseTupleAndKeywords(args, kwds, "|Oisiz", kw,
char *kw[] = { "type", "mode", "device", "cardindex", "card", "rate", "channels", "format", "periodsize", NULL };
if (!PyArg_ParseTupleAndKeywords(args, kwds, "|Oisiziiii", kw,
&pcmtypeobj, &pcmmode, &device,
&cardidx, &card))
&cardidx, &card, &rate, &channels, &format, &periodsize))
return NULL;
if (cardidx >= 0) {
@@ -471,10 +476,10 @@ alsapcm_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
self->handle = 0;
self->pcmtype = pcmtype;
self->pcmmode = pcmmode;
self->channels = 2;
self->rate = 44100;
self->format = SND_PCM_FORMAT_S16_LE;
self->periodsize = 32;
self->channels = channels;
self->rate = rate;
self->format = format;
self->periodsize = periodsize;
res = snd_pcm_open(&(self->handle), device, self->pcmtype,
self->pcmmode);
doc/libalsaaudio.rst
+9 -6
View File
@@ -108,7 +108,7 @@ PCM objects in :mod:`alsaaudio` can play or capture (record) PCM
sound through speakers or a microphone. The PCM constructor takes the
following arguments:
.. class:: PCM(type=PCM_PLAYBACK, mode=PCM_NORMAL, device='default', cardindex=-1)
.. class:: PCM(type=PCM_PLAYBACK, mode=PCM_NORMAL, rate=44100, channels=2, format=PCM_FORMAT_S16_LE, periodsize=32, device='default', cardindex=-1)
This class is used to represent a PCM device (either for playback and
recording). The arguments are:
@@ -117,6 +117,10 @@ following arguments:
(default).
* *mode* - can be either :const:`PCM_NONBLOCK`, or :const:`PCM_NORMAL`
(default).
* *rate* - the sampling rate. The default value is 44100.
* *channels* - the number of channels. The default value is 2 (stereo).
* *format* - the data format. The default value is :const:`PCM_FORMAT_S16_LE`,
* *periodsize - the period size. The default value is 32. Each write should consist of *periodsize* frames.
* *device* - the name of the PCM device that should be used (for example
a value from the output of :func:`pcms`). The default value is
``'default'``.
@@ -125,12 +129,11 @@ following arguments:
the `device` keyword argument is ignored.
``0`` is the first hardware sound card.
This will construct a PCM object with these default settings:
This will construct a PCM object with the given settings.
* Sample format: :const:`PCM_FORMAT_S16_LE`
* Rate: 44100 Hz
* Channels: 2
* Period size: 32 frames
*Changed in 0.9:*
- Added optional arguments `rate`, `channels`, `format` and `periodsize`.
*Changed in 0.8:*