[alsa-devel] [Question] Can I open a substream in kernel space without attach to a file pointer?
cooloney at kernel.org
Wed Nov 19 11:00:36 CET 2008
I am developing a USB gadget driver compliant to USB Audio Class Spec 2.0.
So I want to open a PCM substream and do some playback of capture,
then close them?
I found snd_pcm_open_substream() is for opening a substream and attach
it to a file.
But in my application, there is no need to open a file before opening
- Is there any interface for me to open a substream in kernel space
without attach to a file?
- How to playback and capture in kernel space, use snd_pcm_lib_write
- How to get the snd_pcm_hardware struct from low level driver,
because I have to get the hardware configuration of the snd pcm
And I am reading the code of OSS emulator in ALSA. It provides some
info about the kernel space sound card programming.
Thanks a lot
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