[alsa-devel] Problem with mplayer and OSS on at91sam9g20(kernel 2.6.30)

[Sedji Gaouaou]

Hi,

We've been doing some tests here and we noticed a problem when using 
mplayer that we didn't have previously(on 2.6.27).

While playing audio through OSS emulation on 2.6.30 / at91sam9g20ek 
there seems to be issue with hardware parameters. The sound does not 
play and a bunch of error messages are comming on the console.

Here is the test case on angstrom:

-- mplayer output sample -------------------------

mplayer -quiet myfile.mp3

MPlayer 1.0rc1-4.1.2 (C) 2000-2006 MPlayer Team
CPU: ARM
Playing /media/sda/audio/01.mp3.
[..]
AUDIO: 44100 Hz, 2 ch, s16le, 192.0 kbit/13.61% (ratio: 24000->176400)
Selected audio codec: [mad] afm: libmad (libMAD MPEG layer 1-2-3)
[AO OSS]setup: driver doesn't support SNDCTL_DSP_GETOSPACE :-(

-- kernel output sample -------------------------

Atmel_ssc_dai: Entering atmel_ssc_hw_params()
natmel_ssc_hw_params: RCMR=00010420 RFMR=001f008f TCMR=4a010404 
TFMR=001f008f
atmel_ssc_dai: Starting clock
atmel_ssc_dai,hw_params: SSC initialized
Atmel_ssc_dai: Entering atmel_ssc_hw_params()
atmel_ssc_hw_params: RCMR=00010420 RFMR=001f008f TCMR=4a010404 TFMR=001f008f
atmel_ssc_dai,hw_params: SSC initialized
Atmel_ssc_dai: Entering atmel_ssc_hw_params()
atmel_ssc_hw_params: RCMR=00010420 RFMR=001f018f TCMR=4a010404 TFMR=001f018f
atmel_ssc_dai,hw_params: SSC initialized
asoc: machine hw_params failed
asoc: machine hw_params failed
asoc: machine hw_params failed
asoc: machine hw_params failed
asoc: machine hw_params failed
asoc: machine hw_params failed
asoc: machine hw_params failed
[..]
asoc: machine hw_params failed

MPlayer interrupted by signal 2 in module: ao2_init
atmel_ssc_shutdown: transmit disabled SSC_SR=0x000004cc
atmel_ssc_dau: Stopping clock
soc-audio soc-audio: shutdown
pop wq checking: Playback status: inactive waiting: yes
pop wq D1 WM8731 Playback
pop wq D3 WM8731 Playback

-- 2 error messages to note -------------------------
mplayer:
"[AO OSS]setup: driver doesn't support SNDCTL_DSP_GETOSPACE :-("

kernel:
"asoc: machine hw_params failed"


=> please note also that it is working correctly using the alsa output:
mplayer -ao alsa myfile.mp3

Here is the log while using the alsa output (it is working in this case):

root at at91sam:~$ mplayer -quiet -ao alsa /media/sda/audio/01.mp3
MPlayer 1.0rc1-4.1.2 (C) 2000-2006 MPlayer Team
CPU: ARM

Playing /media/sda/audio/01.mp3.
Audio file file format detected.
Clip info:
  Title: Angel
  Artist: Massive Attack
  Album: Mezzanine
  Year: 1998
  Comment: Ripped by Beto
  Track: 1
  Genre: Rock
==========================================================================
Forced audio codec: mad
Opening audio decoder: [libmad] libmad mpeg audio decoder
AUDIO: 44100 Hz, 2 ch, s16le, 192.0 kbit/13.61% (ratio: 24000->176400)
Selected audio codec: [mad] afm: libmad (libMAD MPEG layer 1-2-3)
==========================================================================
atmel_ssc_startup: SSC_SR=0x204
asoc: WM8731 <-> atmel-ssc0 info:
asoc: rate mask 0x6fe
asoc: min ch 1 max ch 2
asoc: min rate 8000 max rate 96000
Atmel_ssc_dai: Entering atmel_ssc_hw_params()
atmel_ssc_hw_params: RCMR=00010420 RFMR=001f018f TCMR=19010404 TFMR=001f018f
atmel_ssc_dai: Starting clock
atmel_ssc_dai,hw_params: SSC initialized
transmit enabled SSC_SR=0x000104cf
AO: [alsa] 44100Hz 2ch s16le (2 bytes per sample)
Video: no video
Starting playback...
[..]
atmel_ssc_shutdown: transmit disabled SSC_SR=0x000104c3
atmel_ssc_dau: Stopping clock
soc-audio soc-audio: shutdown
Exiting... (Quit)

pop wq checking: Playback status: inactive waiting: yes
pop wq D1 WM8731 Playback
pop wq D3 WM8731 Playback


egards,
Sedji