[meta-freescale] [meta-fsl-arm] i.MX6 audio performance

[Gary Thomas]

On 2014-01-03 10:06, Eric Nelson wrote:
> Hi Gary,
>
> On 01/03/2014 08:51 AM, Gary Thomas wrote:
>> On 2014-01-03 08:23, Fabio Estevam wrote:
>>> On Fri, Jan 3, 2014 at 1:19 PM, Gary Thomas <gary at mlbassoc.com> wrote:
>>>> I'm trying to play MP3 files on my SabreLite (using mplayer from
>>>> meta-oe).  The performance is horrible; I only hear a fraction
>>>> of a second then noise/nothing then another fraction of sound, etc.
>>>> If I convert the file to .WAV and play using 'aplay' the sound is
>>>> perfect.
>>>
>>> Which mp3 decoder is being used on your test?
>>
>> This is what mplayer tells me:
>> ==========================================================================
>> Forced audio codec: mad
>> Requested audio codec family [mad] (afm=libmad) not available.
>> Enable it at compilation.
>> Requested audio codec family [mpg123] (afm=mpg123) not available.
>> Enable it at compilation.
>> Opening audio decoder: [ffmpeg] FFmpeg/libavcodec audio decoders
>> AUDIO: 44100 Hz, 2 ch, floatle, 128.0 kbit/4.54% (ratio: 16002->352800)
>> Selected audio codec: [ffmp3float] afm: ffmpeg (FFmpeg MPEG layer-3 audio)
>>
>> So I assume that it's using FFMPEG.  I get the same messages on my OMAP3
>>
>> I've also run the same experiment on the SabreLite using gstreamer like
>> this
>>     gst-launch filesrc location=file.mp3 ! audio/mpeg,layer=3 !
>> ffdec_mp3 ! alsasink
>> This also plays fine on the SabreLite, so it seems that it's only something
>> about mplayer.
>>
>> I also noticed that on the SabreLite, mplayer is using an additional
>> library
>>    libXxf86dga.so.1
>> and that it was built using hard floating point (the OMAP3 is soft).
>>
>> Any ideas?
>>
>
> Are you forcing ALSA output using '-ao alsa'? I've seen some issues with
> OSS emulation and I'm not sure of the default.
>
> Please advise,

No, I'm using it straight
   # mplayer FILE.mp3
Same on both platforms

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Gary Thomas                 |  Consulting for the
MLB Associates              |    Embedded world
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