[alsa-devel] ALSA buffer query
perex at perex.cz
Thu Nov 11 08:18:06 CET 2010
On Thu, 11 Nov 2010, Irfan Shaikh wrote:
> Hello All,
> 1) My understanding : snd_pcm_writei() takes the allocated buffer
> from applications and passes the buffer beneath to the ASLA library and
> then to the ALSA driver for rendering Audio.
> 2) Query 1 : Instead of me allocating the buffer in ALSA
> application and passing the pointer in snd_pcm_writei, Can ALSA allocate
> the buffer and give to my application, so that i can copy my data into
> 3) Query 2 : Is there any wayto diirectly get hardware ALSA buffer
> from the ALSA driver to application so that i can copy PCM data to this
> buffer directly.
> If not, is there any way can we do this ?
Read alsa-lib documentation. snd_pcm_mmap_begin/snd_pcm_mmap_commit.
Jaroslav Kysela <perex at perex.cz>
Linux Kernel Sound Maintainer
ALSA Project, Red Hat, Inc.
More information about the Alsa-devel