Re: [alsa-devel] [PATCH] - arecord - remove "front" and related devices from the output of list-pcm option of arecord

3 Jul 2010


      2010/7/2 Jaroslav Kysela perex@perex.cz
...
On Fri, 2 Jul 2010, Raymond Yau wrote:
2010/7/1 Jaroslav Kysela perex@perex.cz
...
On Thu, 1 Jul 2010, Raymond Yau wrote:
...
Replace "front" device by "hw" device  and remove "rear", "center_lfe" ,
...
"side" , "surroundxx" from the output of "arecord -L" since "front"
device
cannot be used for capturing and the front device is for playback only
 .
NAK. Fix alsa-lib/configuration to return proper "IOID".
                                  Jaroslav


I guess  the hint "IOID" has not implemented , the namehint.c did not add
"Input" or "Output" to the hint_list and snd_device_name_get_hint() is
unable to retrieve "IOID" from the hint_list
Use device_input and device_output in the hint {} section instead device.
                                           Jaroslav


The only conf file which contain device_input and device_output is
alsa-lib/src/conf/pcm/default.conf
hint {
        description "Default Audio Device"
        device_output {
            @func refer
            name defaults.pcm.dmix.device
        }
        device_input {
            @func refer
            name defaults.pcm.dsnoop.device
        }
    }
But arecord -L or aplay -L show both dmix:CARD=xxx , dsnopp:CARD=xxx devices
Any example how to set the correct syntax to use device_input and
device_output ?
Do I need to put them in every card's conf file or just pcm/front.conf ?