[alsa-devel] issue with AD1989A HDA codec and alsamixer

[Raymond Yau]

2011/2/7 Vincent Meserette <vmeserette at aldebaran-robotics.com>

>
> To record four channels simultaneously, I have created the following alsa configuration file :
>
> *# output device
> pcm.AD1989A{
>     type hw
>     card 0
> }
>
> # input device* *
> pcm.quad {
>         type multi
>
>         slaves.a.pcm "hw:0,0,0" # ADC 0 of the codec (left and right mics)
>         slaves.a.channels 2
>         slaves.b.pcm "hw:0,0,1" # ADC 1 of the codec (front and rear mics)
>         slaves.b.channels 2
>
>         bindings.0.slave a
>         bindings.0.channel 0
>         bindings.1.slave a
>         bindings.1.channel 1
>         bindings.2.slave b
>         bindings.2.channel 0
>         bindings.3.slave b
>         bindings.3.channel 1
> }
>
> # input device containing interleaved data
> pcm.quad2 {
>         type route
>         slave.pcm "quad"
>         ttable.0.0 1
>         ttable.1.1 1
>         ttable.2.2 1
>         ttable.3.3 1
> }
>
> ### CTL DEVICES (controls)
> ctl.mixer0 {
>     type hw
>     card 0
> }*
>
> With this configuration file, I am able to record the four channels
> simultaneously with the following command :
>
> arecord -c4 -fS16_LE -r48000 -D «quad2 » -d5 /tmp/recording.wav
>
>
it is strange that I alway got overrun only at the first time of running the
above command but no overrun on the second time

arecord -v -c4 -fS16_LE -r48000 -D quad2  -d5 /tmp/recording.wav
Recording WAVE '/tmp/recording.wav' : Signed 16 bit Little Endian, Rate
48000 Hz, Channels 4
Route conversion PCM
  Transformation table:
    0 <- 0
    1 <- 1
    2 <- 2
    3 <- 3
Its setup is:
  stream       : CAPTURE
  access       : RW_INTERLEAVED
  format       : S16_LE
  subformat    : STD
  channels     : 4
  rate         : 48000
  exact rate   : 48000 (48000/1)
  msbits       : 16
  buffer_size  : 16384
  period_size  : 4096
  period_time  : 85333
  tstamp_mode  : NONE
  period_step  : 1
  avail_min    : 4096
  period_event : 0
  start_threshold  : 1
  stop_threshold   : 16384
  silence_threshold: 0
  silence_size : 0
  boundary     : 1073741824
Slave: Multi PCM
  Channel bindings:
    0: slave 0, channel 0
    1: slave 0, channel 1
    2: slave 1, channel 0
    3: slave 1, channel 1
Its setup is:
  stream       : CAPTURE
  access       : MMAP_COMPLEX
  format       : S16_LE
  subformat    : STD
  channels     : 4
  rate         : 48000
  exact rate   : 48000 (48000/1)
  msbits       : 16
  buffer_size  : 16384
  period_size  : 4096
  period_time  : 85333
  tstamp_mode  : NONE
  period_step  : 1
  avail_min    : 4096
  period_event : 0
  start_threshold  : 1
  stop_threshold   : 16384
  silence_threshold: 0
  silence_size : 0
  boundary     : 1073741824
Slave #0: Hardware PCM card 1 'HDA Intel' device 0 subdevice 0
Its setup is:
  stream       : CAPTURE
  access       : MMAP_INTERLEAVED
  format       : S16_LE
  subformat    : STD
  channels     : 2
  rate         : 48000
  exact rate   : 48000 (48000/1)
  msbits       : 16
  buffer_size  : 16384
  period_size  : 4096
  period_time  : 85333
  tstamp_mode  : NONE
  period_step  : 1
  avail_min    : 4096
  period_event : 0
  start_threshold  : 1
  stop_threshold   : 16384
  silence_threshold: 0
  silence_size : 0
  boundary     : 1073741824
  appl_ptr     : 0
  hw_ptr       : 0
Slave #1: Hardware PCM card 1 'HDA Intel' device 0 subdevice 1
Its setup is:
  stream       : CAPTURE
  access       : MMAP_INTERLEAVED
  format       : S16_LE
  subformat    : STD
  channels     : 2
  rate         : 48000
  exact rate   : 48000 (48000/1)
  msbits       : 16
  buffer_size  : 16384
  period_size  : 4096
  period_time  : 85333
  tstamp_mode  : NONE
  period_step  : 1
  avail_min    : 4096
  period_event : 0
  start_threshold  : 1
  stop_threshold   : 16384
  silence_threshold: 0
  silence_size : 0
  boundary     : 1073741824
  appl_ptr     : 0
  hw_ptr       : 0
overrun!!! (at least 0.001 ms long)
Status:
  state       : XRUN
  trigger_time: 1077.282286934
  tstamp      : 1077.282292637
  delay       : 0
  avail       : 16384
  avail_max   : 16384
overrun!!! (at least 0.001 ms long)
Status:
  state       : XRUN
  trigger_time: 1077.623810402
  tstamp      : 1077.623819150
  delay       : 0
  avail       : 16384