[gst-devel] gstreamer output window

[Sanjay Gupta]

On 6/13/07, bounce bounce <bouncebounce at caramail.com> wrote:
>
> Hi,
>
> I'vealready send a mail on this mailing list because I don't succeed to
> output a video in a Xwindow drawing area with a "playbin" and a
> "directdrawsink" on Windows. And I always do not succed in that.
>
> Well, if we used a "playbin" and play the video, the element will create
> its own internal window and render into it because no Window ID was provided
> by the application or because of an error during the configuration
>
I think you are trying to draw the video frames on your own xwindow. Use the
following code snippet to do so :
--------------
#include <gst/gst.h>
#include <gst/interfaces/xoverlay.h>
#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <math.h>
#include <sys/time.h>

GstElement *bin;
static Display *disp;
static Window root, win;
static GC gc;
static gint width = 176, height = 220 ;
static gint disp_width, disp_height;

static void open_display (void)
{
    gint screen_num;
    disp = XOpenDisplay (NULL);
    root = DefaultRootWindow (disp);
    screen_num = DefaultScreen (disp);
    disp_width = DisplayWidth (disp, screen_num);
    disp_height = DisplayHeight (disp, screen_num);
}

static GstBusSyncReply
create_window (GstBus * bus, GstMessage * message, GstPipeline * pipeline)
{
    XGCValues values;
    const GstStructure *s;
    s = gst_message_get_structure (message);
    if (!gst_structure_has_name (s, "prepare-xwindow-id")) {
        return GST_BUS_PASS;
    }
    g_print ("Creating our own window\n");
    win = XCreateSimpleWindow (disp, root, 0, 0, width, height, 0, 0, 0);
    XSetWindowBackgroundPixmap (disp, win, None);
    gc = XCreateGC (disp, win, 0, &values);
    XMapRaised (disp, win);
    XSync (disp, FALSE);
    gst_x_overlay_set_xwindow_id (GST_X_OVERLAY (GST_MESSAGE_SRC (message)),
win);
    return GST_BUS_DROP;
}

int main (int argc, char *argv[])
{
    ....
    ....
    open_display ();
    bin = gst_element_factory_make ("playbin", "playbin");
    g_object_set (G_OBJECT (bin), "uri", argv[1], NULL);
    bus = gst_pipeline_get_bus (GST_PIPELINE (bin));
    gst_bus_set_sync_handler (bus, (GstBusSyncHandler) create_window, bin);
    gst_object_unref (bus);
    ....
    ....
    //close the created display at the end.
    XCloseDisplay (disp);
}
//------------------
It should work.

Regards,
Sanjay
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