Thanks for your reply Steve!
I'm using the AIC23 driver bundled in the OMAP kernel, I tried playing
through OSS directly to /dev/dsp (which gives me the best results,
choppy sound though) and through ALSA which is similar. Doing cat
test.wav > /dev/dsp or /dev/audio just gives me noise output. And I
still can't record anything.
I've tried every player possible. Here is the output of aplay:
root@DEA /opt/audios/wav # aplay -lL
default:CARD=AIC23
OSK AIC23, omap alsa pcm
Default Audio Device
null
Discard all samples (playback) or generate zero samples (capture)
**** List of PLAYBACK Hardware Devices ****
card 0: AIC23 [OSK AIC23], device 0: OMAP PCM [omap alsa pcm]
Subdevices: 1/1
Subdevice #0: subdevice #0
root@DEA /opt/audios # aplay audio_44100_16PCM.au -vv
Playing Sparc Audio 'audio_44100_16PCM.au' : Signed 16 bit Big Endian,
Rate 44100 Hz, Stereo
Plug PCM: Linear conversion PCM (S16_LE)
Its setup is:
stream : PLAYBACK
access : RW_INTERLEAVED
format : S16_BE
subformat : STD
channels : 2
rate : 44100
exact rate : 44100 (44100/1)
msbits : 16
buffer_size : 32768
period_size : 2048
period_time : 46439
tick_time : 0
tstamp_mode : NONE
period_step : 1
sleep_min : 0
avail_min : 2048
xfer_align : 2048
start_threshold : 32768
stop_threshold : 32768
silence_threshold: 0
silence_size : 0
boundary : 1073741824
Slave: Hardware PCM card 0 'OSK AIC23' device 0 subdevice 0
Its setup is:
stream : PLAYBACK
access : MMAP_INTERLEAVED
format : S16_LE
subformat : STD
channels : 2
rate : 44100
exact rate : 44100 (44100/1)
msbits : 16
buffer_size : 32768
period_size : 2048
period_time : 46439
tick_time : 0
tstamp_mode : NONE
period_step : 1
sleep_min : 0
avail_min : 2048
xfer_align : 2048
start_threshold : 32768
stop_threshold : 32768
silence_threshold: 0
silence_size : 0
boundary : 1073741824
############### +| 99%underrun!!!
(at least 0.366 ms long)
Status:
state : XRUN
trigger_time: 1217931313.815063477
tstamp : 1217931313.815307617
delay : 0
avail : 32768
avail_max : 32768
############## +| 99%underrun!!!
(at least 0.152 ms long)
Status:
state : XRUN
trigger_time: 1217931314.353729248
tstamp : 1217931314.353851319
delay : 0
avail : 32768
avail_max : 32768
##################################################+| 99%underrun!!!
(at least 0.153 ms long)
Status:
state : XRUN
trigger_time: 1217931314.892425537
tstamp : 1217931314.892547608
delay : 0
avail : 32768
avail_max : 32768
##################################################+| 99%underrun!!!
(at least 0.092 ms long)
Status:
state : XRUN
trigger_time: 1217931315.467193604
tstamp : 1217931315.467254639
delay : 0
avail : 32768
avail_max : 32768
############################### +| 99%underrun!!!
(at least 0.092 ms long)
Status:
state : XRUN
trigger_time: 1217931316.107543946
tstamp : 1217931316.107635498
delay : 0
avail : 34816
avail_max : 34816
##################################################+| 99%underrun!!!
(at least 0.091 ms long)
Status:
state : XRUN
trigger_time: 1217931316.747711182
tstamp : 1217931316.747802735
delay : 0
avail : 34816
avail_max : 34816
##################################################+| 99%underrun!!!
(at least 0.122 ms long)
Status:
state : XRUN
trigger_time: 1217931317.326873780
tstamp : 1217931317.326965332
delay : 0
avail : 32768
avail_max : 32768
##DMA timeout with device 8#######################+| 99%
{sound_dma_irq_handler}-ERROR: DCSR_ERROR!
##################################################+| 99%
root@DEA /opt/audios/wav # aplay test.wav
Playing WAVE 'test.wav' : Unsigned 8 bit, Rate 24000 Hz, Mono
underrun!!! (at least 0.396 ms long)
When playing a long audio file, there is a lot of underruns (XRUN).
I've tried playing ogg files with ogg123, mp3 files with madplay and
also tested with a lot of different sample rates and bitrates, always
choppy sound (good quality but the audio looks like it's splitted into
chunks, and sometimes it loops in the end).
Do you have any hint?
Thanks
---
Yuri Jaeger Monti
On Mon, Aug 25, 2008 at 10:56 PM, Steve Poulsen <spoulsen@xxxxxxxxxxxxx> wrote:
> Yuri,
>
> We have had good luck with ARM audio under this setup. We did write our own
> AIC23 drivers which we used directly from our application. We used a device
> entry (/dev/aic23) that hooked in our driver. We were able to open those in
> any application and play/record or both. The only possible problem was if
> we tried to do things like "cat file.pcm > /dev/aic23". Although this would
> work, some cases would not work due to those applications buffering schemes.
> For example, this was bad: "cat /dev/aic23 > /dev/aic23". It would work,
> but would be choppy.
> How are you playing audio?
>
> Steve
>
> Yuri Jaeger Monti wrote:
>>
>> Hi fellows,
>>
>> I tried everything I could to solve the buffer underrun error's while
>> playing some audio in the OSK5912 with the AIC23, and I don't know
>> what should I do anymore.
>> I'm trying to simply output and audio file via the ARM, I think this
>> should be ok but the audio is always choppy.
>> Am I doing something wrong? Or perhaps should I use only the DSP
>> processor to play the audio? (didn't tried this yet because I need the
>> DSP to do other tasks).
>>
>> Cheers
>>
>> ---
>> Yuri Jaeger Monti
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>>
>
>
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