[Vorbis-dev] Does libao use /dev/sound for audio ?

[Diptopal Basu]

Resending the mail . Please help .

On Tue, Apr 14, 2009 at 8:30 PM, Diptopal Basu <diptopal.basu at gmail.com>wrote:

> Hi Conrad ,
>
>     Thanks for your response , please see my answers below .
>
> Regards
> Diptopal Basu
>
> On Tue, Apr 14, 2009 at 7:04 PM, Conrad Parker <conrad at metadecks.org>wrote:
>
>> Mr. Basu,
>>
>> 1. Have you successfully compiled anything else on this ARM platform?
>> Is there something particular about vorbis that you are having trouble
>> with, or are you having general problems with building software for
>> this platform?
>
>
>    Answer : I have compiled the Linux kernel version 2.6.26.5 for ARM
> including busybox . I have created the ramfs file system and compiled the
> kernel modules and placed the modules in the ramfs file system. I have a
> running Linux kernel on QEMU simulator for ARM versatile Application
> baseboard  , the real hardware will be coming in soon. I am using ELDK
> v4.1 for ARM
>
>    I have compiled basic hello world programs on Linux and a program which
> programs the timer and prints messages on each timeout . These programs run
> successfully the kernel I compiled .
>
>   I do not have a clue as to where to change the makefiles and config
> files for the ligogg and the libvorbis files for building them with ARM
> compiler  . What are the factors that I need to take care if I try to cross
> compile these libraries on ARM ?
>
>   How do these libraries interact with the Linux kernel ? How to use these
> libraries if I am planning to write a player software ?
>
>
>>
>>
>> 2. how have tried to compile the vorbis libraries on ARM already? what
>> errors have you encountered? What steps did you take to fix these
>> errors?
>
>
> Answer : No I have not yet tried to compile the files , I have not found
> any information as I stated above.
>
>>
>>
>> 3. What is the purpose of libao? What is the purpose of libvorbis?
>> Which of the problems that you are having relate to libao, and which
>> relate to libvorbis?
>>
>
> Answer : Eventually I need to use ogg123 ( ogg123 uses libao to output
> sound thats what I heard ) and therefore I need have the rest of the files
> like libao libogg libcurl libvorbis ready , I need to understand the
> interactions of these libraries and of course how to compile all of them on
> ARM .
>
>  So I will have a separate application which will communicate with ogg123
> using IPC pipes and control the playback of oggfiles .
>
>>
>> Conrad.
>>
>> 2009/4/14 Diptopal Basu <diptopal.basu at gmail.com>:
>>  > I need information on compiling the vorbis libraries on ARM , can
>> anyone
>> > help ?
>> >
>> > Regards
>> > Diptopal
>> >
>> > On Tue, Apr 14, 2009 at 10:16 AM, Diptopal Basu <
>> diptopal.basu at gmail.com>
>> > wrote:
>> >>
>> >> Hi Michael ,
>> >>
>> >>  Actually I will need to use ogg123 for some implementation hence libao
>> .
>> >>
>> >> So you mean even if my /dev/sound has problems I can use the vorbis
>> >> libraries ( not the libao , only the vorbis libraries ) ?
>> >>
>> >> Regards
>> >> Diptopal
>> >>
>> >> On Tue, Apr 14, 2009 at 10:12 AM, Michael Smith <msmith at xiph.org>
>> wrote:
>> >>>
>> >>> On Mon, Apr 13, 2009 at 9:09 PM, Diptopal Basu <
>> diptopal.basu at gmail.com>
>> >>> wrote:
>> >>> >
>> >>> >
>> >>> > I am using the Versatile Application baseboard and intend to use the
>> >>> > ogg
>> >>> > vorbis libraries .
>> >>> >
>> >>> > I have been able to install all the modules related to sound .
>> However
>> >>> > I
>> >>> > think there's something wrong with the /sev/sound folder in my
>> kernel ,
>> >>> > hence everytime we do
>> >>> >
>> >>> > cat anything.au > /dev/audio
>> >>> >
>> >>> > It throws an error cant create device /dev/audio even though
>> /dev/audio
>> >>> > is
>> >>> > present .
>> >>> >
>> >>> > My question is the ogg vorbis libraries like the libao , do they
>> make
>> >>> > use of
>> >>> > /dev/audio or is there any other mechanism .
>> >>>
>> >>> libao is not an ogg or vorbis library. It's a completely unrelated
>> >>> library, for audio output - and it's unmaintained, so I don't know if
>> >>> anyone will be able to help you with it.
>> >>>
>> >>> Fortunately, since libao has nothing to do with ogg or vorbis, you can
>> >>> happily use vorbis without using libao.
>> >>>
>> >>> Mike
>> >>
>> >
>> >
>> > _______________________________________________
>> > Vorbis-dev mailing list
>> > Vorbis-dev at xiph.org
>> > http://lists.xiph.org/mailman/listinfo/vorbis-dev
>> >
>> >
>>
>
>
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