pcm test app failure on PowerPC

pcm test app failure on PowerPC

[John Faith]

Hello,
I am using alsa-lib 1.0.15 on an embedded PowerPC board.  I can play 
audio with aplay, but gstreamer fails, so I built and ran the 'pcm' app 
in alsa-lib-1.0.15/test/.  pcm gives:

# export LIBASOUND_DEBUG=1
# ./pcm
Playback device is plughw:0,0
Stream parameters are 44100Hz, S16_BE, 1 channels
Sine wave rate is 440.0000Hz
Using transfer method: write
ALSA lib pcm_plug.c:773:(snd_pcm_plug_hw_refine_schange) Unable to find 
an usable access for 'plughw:0,0'
ALSA ERROR hw_params: set (FORMAT)
            value = S16_BE : Invalid argument
ACCESS:  RW_INTERLEAVED
FORMAT:  S8 U8 S16_LE S16_BE U16_LE U16_BE S24_LE S24_BE U24_LE U24_BE 
S32_LE S32_BE U32_LE U32_BE FLOAT_LE FLOAT_BE
SUBFORMAT:  STD
SAMPLE_BITS: [4 64]
FRAME_BITS: [4 640000]
CHANNELS: [1 10000]
RATE: [4000 4294967295)
PERIOD_TIME: [25000 300000]
PERIOD_SIZE: [100 1288490189)
PERIOD_BYTES: [50 4294967295)
PERIODS: (0 12884902)
BUFFER_TIME: [1 4294967295]
BUFFER_SIZE: [100 1288490188]
BUFFER_BYTES: [50 4294967295]
TICK_TIME: 4000
Sample format not available for playback: Invalid argument
Setting of hwparams failed: Invalid argument


Is the driver saying it can do format S16_BE somewhere, but fails when 
the format is actually set?  How can I dig deeper on this?


Thanks in advance for any ideas!
,
John

Re: pcm test app failure on PowerPC

[John Faith]

Hello,
I had a look at the driver for my platform and in its snd_pcm_hardware 
struct, it sets ".formats = SNDRV_PCM_FMTBIT_S16_LE" (no big endian 
format).  Does the S16_BE format being used by alsalib/test/pcm get set 
  in alsalib or elsewhere in the kernel?

Thanks,
John


John Faith wrote:
> Hello,
> I am using alsa-lib 1.0.15 on an embedded PowerPC board.  I can play 
> audio with aplay, but gstreamer fails, so I built and ran the 'pcm' app 
> in alsa-lib-1.0.15/test/.  pcm gives:
> 
> # export LIBASOUND_DEBUG=1
> # ./pcm
> Playback device is plughw:0,0
> Stream parameters are 44100Hz, S16_BE, 1 channels
> Sine wave rate is 440.0000Hz
> Using transfer method: write
> ALSA lib pcm_plug.c:773:(snd_pcm_plug_hw_refine_schange) Unable to find 
> an usable access for 'plughw:0,0'
> ALSA ERROR hw_params: set (FORMAT)
>             value = S16_BE : Invalid argument
> ACCESS:  RW_INTERLEAVED
> FORMAT:  S8 U8 S16_LE S16_BE U16_LE U16_BE S24_LE S24_BE U24_LE U24_BE 
> S32_LE S32_BE U32_LE U32_BE FLOAT_LE FLOAT_BE
> SUBFORMAT:  STD
> SAMPLE_BITS: [4 64]
> FRAME_BITS: [4 640000]
> CHANNELS: [1 10000]
> RATE: [4000 4294967295)
> PERIOD_TIME: [25000 300000]
> PERIOD_SIZE: [100 1288490189)
> PERIOD_BYTES: [50 4294967295)
> PERIODS: (0 12884902)
> BUFFER_TIME: [1 4294967295]
> BUFFER_SIZE: [100 1288490188]
> BUFFER_BYTES: [50 4294967295]
> TICK_TIME: 4000
> Sample format not available for playback: Invalid argument
> Setting of hwparams failed: Invalid argument
> 
> 
> Is the driver saying it can do format S16_BE somewhere, but fails when 
> the format is actually set?  How can I dig deeper on this?
> 
> 
> Thanks in advance for any ideas!
> ,
> John