[gst-devel] PushSrc problem

[Benoit Fouet]

Corentin BARON wrote:

> Right, this also changed from 0.8, now it goes up to the PREROLLING 
> stage before crashing :p
>
> Now the problem I got is with my create() function (too much things 
> have changed in 0.10 from 0.8, I'm quite lost on some points):
>
> As it's made on videotestsrc, I replaced my old good working 0.8 
> style get() function with a create() function:
>
>> static GstFlowReturn
>> gst_blinkysrc_create(GstPushSrc * psrc,
>>                     GstBuffer ** buffer) {
>
for what i've done with src plugins, it seems that the prototype is
something like:
static GstFlowReturn
gst_salcam_src_create( GstBaseSrc *basesrc, guint64 offset, guint length,
                       GstBuffer **buffer )

Rgds,

--Ben

>>     GstBuffer *buf;
>>     [...]
>>     buf = gst_buffer_new();
>>     gst_buffer_set_caps(buf, gst_blinkysrc_getcaps(GST_BASE_SRC(psrc));
>>     [... fill buf as I did in 0.8 ...]
>>     *buffer = buf;
>>     return GST_FLOW_OK;
>> }
>
>
> And registered it in the class_init() function:
>
>> static void
>> gst_blinkysrc_class_init(GstBlinkySrcClass *klass) {
>>     GstBaseSrcClass *gstbasesrc_class;
>>     GstPushSrcClass *gstpushsrc_class;
>>     [...]
>>     gstpushsrc_class->create = gst_blinkysrc_create;
>> }
>
>
> But if the create function is present, my element does'nt even load 
> in GStreamer. And, of course, when absent nothing happens but a 
> segfault (but the plugin loads).
>
> Thx,
> Corentin.
>
> Le 10 août 06 à 09:45, Benoit Fouet a écrit :
>
>> Corentin BARON wrote:
>>
>>> Right, I forgot to update the boilerplate. But it still doesn't work:
>>> gstreamer goes twice through my getcaps() function (which are
>>> strictly the same as in 0.8), but tells me the pipeline is wrong,
>>> even if I fix the framerate. Here's my plugin's verbose output
>>> (sorry, french system):
>>>
>>>> getcaps()
>>>> | Caps:
>>>> video/x-raw-yuv, format=(fourcc)I420, width=(int)640, height=(int)
>>>> 480, framerate=(double)[ 1, 100 ]
>>>> getcaps()
>>>> | Caps:
>>>> video/x-raw-yuv, format=(fourcc)I420, width=(int)640, height=(int)
>>>> 480, framerate=(double)[ 1, 100 ]
>>>> AVERTISSEMENT: tube erroné: impossible de connecter blinkysrc0 a
>>>> xvimagesink0
>>>
>>>
>>>
>> doesn't framerate have to be a fraction, and not a double ?
>
>
>
>
>
>
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