How to provide a custom plugin to gstreamer in Android ?

Thu Apr 4 23:56:39 PDT 2013

Would be useful to have a template to build android plugins similar to 
this one

http://cgit.freedesktop.org/gstreamer/gst-template/

or modify the above template to handle build for android and windows too,

thanks
Nicola

Il 27/03/2013 16:11, Andoni Morales ha scritto:
> 2013/3/27  <stic at free.fr>:
>> ok it works ! I was using -DGST_PLUGIN_STATIC_BUILD instead of -DGST_PLUGIN_BUILD_STATIC flag following your first answer.
> I am sorry for that, I was writing in from memory on my phone :)
>
> Andoni
>> Thank you very much.
>>
>> ----- Mail original -----
>> De: "Andoni Morales" <ylatuya at gmail.com>
>> À: "Discussions about GStreamer on Android" <gstreamer-android at lists.freedesktop.org>
>> Envoyé: Mardi 26 Mars 2013 10:58:45
>> Objet: Re: How to provide a custom plugin to gstreamer in Android ?
>>
>> 2013/3/25  <stic at free.fr>:
>>> any help about how to recognize custom plugin in gstreamer Android please ??
>> Hi,
>>
>> I am sorry for getting back to you so late.
>>
>> In the SDK, static plugins are built in the following way:
>>    * Using GST_PLUGIN_DEFINE2 instead of GST_PLUGINS_DEFINE [1]
>>    * Adding the cflag -DGST_PLUGIN_BUILD_STATIC
>>
>> When GST_PLUGIN_BUILD_STATIC is defined, a funtion to register this
>> plugins statically is defined with the name:
>> gst_plugin_foo_register.
>>
>> To check that this function is define properly you can use nm in the
>> following way:
>> arm-linux-androideabi-nm
>> $CERBERO/PREFIX/lib/gstreamer-0.10/static/libgstfoo.a | grep
>> gst_plugin_foo_register
>>
>> Your plugin should be therefore built with -DGST_PLUGIN_BUILD_STATIC
>> and installed to lib/gstreamer-0.10/static/ together with its libtool
>> library.
>> In case you are adding a new plugin to an existent gstreamer project,
>> you will only to need to configure with the options "
>> --enable-static-plugins --enable-static --disable-shared"
>> and make sure your plugins is installed in lib/gstreamer-0.10/static/
>> instead of lib/gstreamer-0.10/
>>
>> Cheers,
>> Andoni
>>
>> [1] http://cgit.freedesktop.org/gstreamer-sdk/gst-plugins-base/tree/gst/volume/gstvolume.c#n1046
>> [2] http://cgit.freedesktop.org/gstreamer-sdk/gst-plugins-base/tree/configure.ac#n375
>> [3] http://cgit.freedesktop.org/gstreamer-sdk/gstreamer/tree/gst/gstplugin.h#n341
>>> ----- Mail original -----
>>> De: stic at free.fr
>>> À: "Discussions about GStreamer on Android" <gstreamer-android at lists.freedesktop.org>
>>> Envoyé: Mardi 19 Mars 2013 11:19:43
>>> Objet: Re: How to provide a custom plugin to gstreamer in Android ?
>>>
>>> Hello Andoni,
>>>
>>> I'm still waiting for any documentation about this that would help :)
>>> Thank you very much.
>>>
>>> ----- Mail original -----
>>> De: "Andoni Morales" <ylatuya at gmail.com>
>>> À: "Discussions about GStreamer on Android" <gstreamer-android at lists.freedesktop.org>
>>> Cc: gstreamer-devel at lists.freedesktop.org
>>> Envoyé: Samedi 16 Mars 2013 21:23:39
>>> Objet: Re: How to provide a custom plugin to gstreamer in Android ?
>>>
>>> 2013/3/14 Jacques Bride <jacques.bride at gmail.com>:
>>>> Hello
>>>>
>>>> Similar to your message, a colleague and I are trying to add a custom plugin
>>>> to the gstreamer-sdk for Android.
>>>> - we built with success the sdk (package gstreamer-sdk) with cerbero and
>>>> cross-android.cbc on Ubuntu1204 (we had to remove the package
>>>> "video-editing" in gstreamer-sdk.package since the gnonlin source code could
>>>> not be correctly fetch by git today (could not understand why))
>>>> - we added a directory with our code in the plugins-bad/gst directory with
>>>> is Makefile.am.
>>>> - we added a static recipe in the recipe folder and added our recipe in the
>>>> plugin-bad recipe
>>>>
>>>> Anyway we are still not done and we we are a bit stuck on how to progress.
>>>> Any hint?
>>> I am on vacations and I can't reply with all the details as I would
>>> like :) I'll be back on Monday and I will try to document all the
>>> steps correctly.
>>>
>>> Cheers,
>>> Andoni
>>>
>>>> Thanks
>>>>
>>>>
>>>>
>>>> 2013/3/13 <stic at free.fr>
>>>>
>>>>> I tried using -DGST_PLUGIN_STATIC_BUILD in CFLAGS, and using
>>>>> GST_PLUGIN_DEFINE2.
>>>>> But it still does not work for me, always same error when trying to use
>>>>> the plugin: undefined reference to 'gst_plugin_testplugin_register'.
>>>>> Do I have to build the plugin using Cerbero or can I compile plugin with
>>>>> GST SDK release ?
>>>>>
>>>>> Thank you
>>>>>
>>>>> El 12/03/2013 21:23, "Andoni Morales" < ylatuya at gmail.com > escribió:
>>>>>>
>>>>>> El 11/03/2013 12:10, < stic at free.fr > escribió:
>>>>>>
>>>>>>> Hello,
>>>>>>>
>>>>>>> in the case I am trying to create a custom gstreamer plugin, how can I
>>>>>>> provide it to gstreamer in Android app ?
>>>>>>> I didn't find how to provide a custom plugin to Android gstreamer.
>>>>>>> Gstreamer finds only plugins already available in the GST SDK.
>>>>>>> I even tried to add the static library of custom plugin in the same
>>>>>>> path as the standard plugins (GSTREAMER_SDK_ROOT/lib/gstreamer-0.10/static)
>>>>>>> but I always have the following message when trying to provide the plugin :
>>>>>>> error: undefined reference to 'gst_plugin_testplugin_register'
>>>>>>> (where testplugin is the name of my plugin)
>>>>>>>
>>>>>> You will also need to create a libtool library for it in this directory
>>>>>> (eg: libgsttestplugin.la ) to help the linker find and link your plugin. And
>>>>>> you must compile your plugin with -DGST_PLUGIN_STATIC_BUILD in your CFLAGS.
>>>>> And use GST_PLUGIN_DEFINE2. It is something we should document :)
>>>>> Andoni
>>>>>> Andoni
>>>>>>
>>>>>>> Thanks a lot for any help :)
>>>>>>> _______________________________________________
>>>>>>> gstreamer-android mailing list
>>>>>>> gstreamer-android at lists.freedesktop.org
>>>>>>> http://lists.freedesktop.org/mailman/listinfo/gstreamer-android
>>>>> _______________________________________________
>>>>> gstreamer-android mailing list
>>>>> gstreamer-android at lists.freedesktop.org
>>>>> http://lists.freedesktop.org/mailman/listinfo/gstreamer-android
>>>>> _______________________________________________
>>>>> gstreamer-android mailing list
>>>>> gstreamer-android at lists.freedesktop.org
>>>>> http://lists.freedesktop.org/mailman/listinfo/gstreamer-android
>>>>
>>>>
>>>> _______________________________________________
>>>> gstreamer-android mailing list
>>>> gstreamer-android at lists.freedesktop.org
>>>> http://lists.freedesktop.org/mailman/listinfo/gstreamer-android
>>>>
>>>
>>>
>>> --
>>> Andoni Morales Alastruey
>>>
>>> LongoMatch:The Digital Coach
>>> http://www.longomatch.ylatuya.es
>>> _______________________________________________
>>> gstreamer-android mailing list
>>> gstreamer-android at lists.freedesktop.org
>>> http://lists.freedesktop.org/mailman/listinfo/gstreamer-android
>>> _______________________________________________
>>> gstreamer-android mailing list
>>> gstreamer-android at lists.freedesktop.org
>>> http://lists.freedesktop.org/mailman/listinfo/gstreamer-android
>>> _______________________________________________
>>> gstreamer-android mailing list
>>> gstreamer-android at lists.freedesktop.org
>>> http://lists.freedesktop.org/mailman/listinfo/gstreamer-android
>>
>>
>> --
>> Andoni Morales Alastruey
>>
>> LongoMatch:The Digital Coach
>> http://www.longomatch.ylatuya.es
>> _______________________________________________
>> gstreamer-android mailing list
>> gstreamer-android at lists.freedesktop.org
>> http://lists.freedesktop.org/mailman/listinfo/gstreamer-android
>> _______________________________________________
>> gstreamer-android mailing list
>> gstreamer-android at lists.freedesktop.org
>> http://lists.freedesktop.org/mailman/listinfo/gstreamer-android
>
>

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