1 Nov
2007
1 Nov
'07
11:10 a.m.
On Wed, 2007-10-31 at 18:48 +0530, Avadhoot Punde wrote:
Hi all
As part of a bigger project, I need to develop a module which reads
PCM data from a file and feeds it to sound driver. Is it possible to
develop such a module without actually writing device driver, I mean
just by using existing functions such as snd_pcm_open and all that ?
Can someone throw more light on this ?
For an example of how to use ALSA, you may want to have a look at this
kit:
http://amirhirsch.com/ps3synth.tar
$ tar -xf ps3synth.tar && cd ps3synth
If you are on Intel hardware, you'll need to edit line 49 in play.c
from:
// Signed 16-bit big-endian format
snd_pcm_hw_params_set_format(handle, params,
SND_PCM_FORMAT_S16_BE);
.. to:
// Signed 16-bit little-endian format
snd_pcm_hw_params_set_format(handle, params,
SND_PCM_FORMAT_S16_LE);
.. and then:
$ make && ./square|./filter|./play
Despite the name of the archive, this is all standard C.
Regards,
Avadhoot
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