[gst-devel] querry : copying an ordinary buffer to GstBuffer

[Stefan Kost]

hi,

sudarshan bisht schrieb:
>  
> Hi ,
>          Try following , would work   ,
>  
>        get_data(void *buffer, size_t frame)
>        {
>                GstBuffer *gst_buffer ;
>                gst_buffer =  gst_buffer_new_and_alloc (frame);
>                memcpy(GST_BUFFER_DATA(gst_buffer) , buffer, frame);
>        }
you should also try to avoid the copy if you can (if you can take
ownership and if the buffer can be freed with g_free()):

gst_buffer =  gst_buffer_new()
GST_BUFFER_MALLOCDATA(gst_buffer) = GST_BUFFER_DATA(gst_buffer) = buffer;
GST_BUFFER_SIZE(gst_buffer) = frame;

Stefan
>
>
>  
> On Mon, Sep 22, 2008 at 3:57 PM, arnabsamanta
> <arnabsamanta at tataelxsi.co.in <mailto:arnabsamanta at tataelxsi.co.in>>
> wrote:
>
>      Hi ,
>            how can i copy the contents of an ordinary buffer created
>     in C++ to the
>     GstBuffer buffer.
>            i have the following.... can any body tell me if its correct
>
>            get_data(void *buffer, size_t frame)
>            {
>                    GstBuffer *gst_buffer ;
>                    gst_buffer =  gst_buffer_new_and_alloc (frame);
>                    memcpy(gst_buffer , buffer, frame);
>            }
>
>            where buffer is the memory segment created by the previous
>     function by
>     "new"
>
>
>            i did so as i guess ,
>                            gst_buffer = GST_BUFFER_CAST(buffer);
>                                     or
>                        gst_buffer = GST_BUFFER_DATA(buffer)
>
>            wont work because "buffer" is not a n GST type buffer.
>
>            is my understanding as stated above is correct ?
>            if wrong , can any body tell me the correct way ?
>
>      regards,
>            ~Arnab
>
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> -- 
> Regards,
>
> Sudarshan Bisht
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