[alsa-devel] pcm test app failure on PowerPC
John Faith
jfaith at freescale.com
Thu Nov 29 19:48:13 CET 2007
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
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