C++ (Cpp) cam_unit_chain_add_unit_by_id Examples

Example #1

File: camview.c Project: ashuang/camunits

static void
on_unit_description_activated (CamUnitManagerWidget *mw, 
        CamUnitDescription *udesc, void *user_data)
{
    state_t *self = user_data;
    cam_unit_chain_add_unit_by_id (self->chain, 
            cam_unit_description_get_unit_id(udesc));
}

Example #2

File: resize_and_publish.c Project: Patrick6289/navguide

int main(int argc, char **argv)
{
    g_type_init();

    CamUnit *resize_unit = NULL;
    CamUnit *faulty_unit = NULL;
    CamUnitChain * chain = NULL;
    const char *input_id = NULL;

    state_t s;
    memset (&s, 0, sizeof (s));
    sprintf (s.filename, "snapshot-output.ppm");

    // create the GLib mainloop
    s.mainloop = g_main_loop_new (NULL, FALSE);

    s.lcm = lcm_create ("udpm://?transmit_only=true");
    if (!s.lcm) {
        fprintf (stderr, "Couldn't create LCM\n");
        goto failed;
    }

    // create the image processing chain
    chain = cam_unit_chain_new ();

    // abort if no input unit was specified
    if (argc < 2) {
        print_usage_and_inputs (argv[0], chain->manager);
        goto failed;
    }
    input_id = argv[1];

    // instantiate the input unit
    if (! cam_unit_chain_add_unit_by_id (chain, input_id)) {
        fprintf (stderr, "Oh no!  Couldn't create input unit [%s].\n\n", 
                input_id);
        print_usage_and_inputs (argv[0], chain->manager);
        goto failed;
    }

    // create a unit to convert the input data to 8-bit RGB
    cam_unit_chain_add_unit_by_id (chain, "convert.to_rgb8");

    resize_unit = cam_unit_chain_add_unit_by_id (chain, 
            "filter.ipp.resize");
//    cam_unit_set_control_boolean (resize_unit, "aspect-lock", FALSE);
    cam_unit_set_control_int (resize_unit, "width", 64);
//    cam_unit_set_control_int (resize_unit, "height", 64);

    // start the image processing chain
    faulty_unit = cam_unit_chain_all_units_stream_init (chain);

    // did everything start up correctly?
    if (faulty_unit) {
        fprintf (stderr, "Unit [%s] is not streaming, aborting...\n",
                cam_unit_get_name (faulty_unit));
        goto failed;
    }

    // attach the chain to the glib event loop.
    cam_unit_chain_attach_glib (chain, 1000, NULL);

    // subscribe to be notified when an image has made its way through the
    // chain
    g_signal_connect (G_OBJECT (chain), "frame-ready",
            G_CALLBACK (on_frame_ready), &s);

    s.next_publish_utime = _timestamp_now ();

    // run 
    g_main_loop_run (s.mainloop);

    // cleanup
    g_main_loop_unref (s.mainloop);
    cam_unit_chain_all_units_stream_shutdown (chain);
    g_object_unref (chain);
    return 0;

failed:
    g_main_loop_unref (s.mainloop);
    cam_unit_chain_all_units_stream_shutdown (chain);
    g_object_unref (chain);
    return 1;
}