[alsa-devel] Capture not working in MMAP mode with '-v'

[Aggarwal, Anuj]

> -----Original Message-----
> From: Aggarwal, Anuj 
> Sent: Thursday, September 24, 2009 2:28 PM
> To: alsa-devel at alsa-project.org
> Subject: Capture not working in MMAP mode with '-v' 
> 
> Hi,
> 
> When I try to capture audio in MMAP mode using the following 
> command, it works properly:
> 
> arecord -f cd -d 10 -M rec01.wav
> 
> However, if I specify '-v' along with the above command, it fails to 
> capture anything and prints log and returns immediately:
> 
> Recording WAVE 'rec03.wav' : Signed 16 bit Little Endian, 
> Rate 44100 Hz, Stereo
> Plug PCM: Hardware PCM card 0 'omap3evm' device 0 subdevice 0
> Its setup is:
>   stream       : CAPTURE
>   access       : MMAP_INTERLEAVED
>   format       : S16_LE
>   subformat    : STD
>   channels     : 2
>   rate         : 44100
>   exact rate   : 44100 (44100/1)
>   msbits       : 16
>   buffer_size  : 22052
>   period_size  : 5513
>   period_time  : 125011
>   tstamp_mode  : NONE
>   period_step  : 1
>   avail_min    : 5513
>   period_event : 0
>   start_threshold  : 1
>   stop_threshold   : 22052
>   silence_threshold: 0
>   silence_size : 0
>   boundary     : 1445199872
>   appl_ptr     : 0
>   hw_ptr       : 0
> mmap_area[0] = 0x4030e000,0,32 (16)
> mmap_area[1] = 0x4030e000,16,32 (16)
> 
> I have not observed this problem while playing audio, only 
> while capture this issue crops up.
> 
> Any pointers?
Any updates on this? We have observed similar problem on other
platforms as well.
> 
> Thanks & Regards,
> Anuj Aggarwal
>