[FFmpeg-devel] [PATCH] lavd/alsa: implement get_device_list callbacks

[Lukasz Marek]

On 22 October 2014 11:53, Nicolas George <george at nsup.org> wrote:

> Le septidi 27 vendémiaire, an CCXXIII, Lukasz Marek a écrit :
> > ---
> >  libavdevice/alsa-audio-common.c | 60
> +++++++++++++++++++++++++++++++++++++++++
> >  libavdevice/alsa-audio-dec.c    |  6 +++++
> >  libavdevice/alsa-audio-enc.c    |  6 +++++
> >  libavdevice/alsa-audio.h        |  2 ++
> >  4 files changed, 74 insertions(+)
> The rest looks good to me, but I have not checked the actual output. If you
> have a working test tree, can you show the output on a typical system?
>

It gives the same list as aplay -L (upper case). For example (ffmpeg will
display it in different way, but the content is the same)

default
    Playback/recording through the PulseAudio sound server
null
    Discard all samples (playback) or generate zero samples (capture)
pulse
    PulseAudio Sound Server
sysdefault:CARD=PCH
    HDA Intel PCH, ALC887-VD Analog
    Default Audio Device
front:CARD=PCH,DEV=0
    HDA Intel PCH, ALC887-VD Analog
    Front speakers
surround40:CARD=PCH,DEV=0
    HDA Intel PCH, ALC887-VD Analog
    4.0 Surround output to Front and Rear speakers
surround41:CARD=PCH,DEV=0
    HDA Intel PCH, ALC887-VD Analog
    4.1 Surround output to Front, Rear and Subwoofer speakers
surround50:CARD=PCH,DEV=0
    HDA Intel PCH, ALC887-VD Analog
    5.0 Surround output to Front, Center and Rear speakers
surround51:CARD=PCH,DEV=0
    HDA Intel PCH, ALC887-VD Analog
    5.1 Surround output to Front, Center, Rear and Subwoofer speakers
surround71:CARD=PCH,DEV=0
    HDA Intel PCH, ALC887-VD Analog
    7.1 Surround output to Front, Center, Side, Rear and Woofer speakers
dmix:CARD=PCH,DEV=0
    HDA Intel PCH, ALC887-VD Analog
    Direct sample mixing device
dsnoop:CARD=PCH,DEV=0
    HDA Intel PCH, ALC887-VD Analog
    Direct sample snooping device
hw:CARD=PCH,DEV=0
    HDA Intel PCH, ALC887-VD Analog
    Direct hardware device without any conversions
plughw:CARD=PCH,DEV=0
    HDA Intel PCH, ALC887-VD Analog
    Hardware device with all software conversions

Question is, if thats correct. Maybe aplay -l (lower case) with "raw"
devices only should be listed , for example:

card 0: PCH [HDA Intel PCH], device 0: ALC887-VD Analog [ALC887-VD Analog]
  Subdevices: 1/1
  Subdevice #0: subdevice #0

I don't know which is better so I'm glad to have more opinions about that/