How to provide a custom plugin to gstreamer in Android ?

Wed Mar 27 08:11:54 PDT 2013

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


-- 
Andoni Morales Alastruey

LongoMatch:The Digital Coach
http://www.longomatch.ylatuya.es