C++ (Cpp) gst_pad_pull Examples

Example #1

File: gstoverlay.c Project: Distrotech/gst-plugins-bad

static void
gst_overlay_loop (GstElement * element)
{
  GstOverlay *overlay;
  GstBuffer *out;
  GstBuffer *in1 = NULL, *in2 = NULL, *in3 = NULL;
  int size;

  overlay = GST_OVERLAY (element);

  in1 = GST_BUFFER (gst_pad_pull (overlay->sinkpad1));
  if (GST_IS_EVENT (in1)) {
    gst_pad_push (overlay->srcpad, GST_DATA (in1));
    /* FIXME */
    return;
  }
  in2 = GST_BUFFER (gst_pad_pull (overlay->sinkpad2));
  if (GST_IS_EVENT (in2)) {
    gst_pad_push (overlay->srcpad, GST_DATA (in2));
    /* FIXME */
    return;
  }
  in3 = GST_BUFFER (gst_pad_pull (overlay->sinkpad3));
  if (GST_IS_EVENT (in3)) {
    gst_pad_push (overlay->srcpad, GST_DATA (in3));
    /* FIXME */
    return;
  }

  g_return_if_fail (in1 != NULL);
  g_return_if_fail (in2 != NULL);
  g_return_if_fail (in3 != NULL);

  size = (overlay->width * overlay->height * 3) / 2;
  g_return_if_fail (GST_BUFFER_SIZE (in1) != size);
  g_return_if_fail (GST_BUFFER_SIZE (in2) != size);
  g_return_if_fail (GST_BUFFER_SIZE (in3) != size);

  out = gst_buffer_new_and_alloc (size);

  gst_overlay_blend_i420 (GST_BUFFER_DATA (out),
      GST_BUFFER_DATA (in1),
      GST_BUFFER_DATA (in2),
      GST_BUFFER_DATA (in3), overlay->width, overlay->height);

  GST_BUFFER_TIMESTAMP (out) = GST_BUFFER_TIMESTAMP (in1);
  GST_BUFFER_DURATION (out) = GST_BUFFER_DURATION (in1);

  gst_buffer_unref (in1);
  gst_buffer_unref (in2);
  gst_buffer_unref (in3);

  gst_pad_push (overlay->srcpad, GST_DATA (out));
}

Example #2

File: gstmikmod.c Project: an146/gst-plugins-good

static void
gst_mikmod_loop (GstElement * element)
{
  GstMikMod *mikmod;
  GstBuffer *buffer_in;

  g_return_if_fail (element != NULL);
  g_return_if_fail (GST_IS_MIKMOD (element));

  mikmod = GST_MIKMOD (element);
  srcpad = mikmod->srcpad;
  mikmod->Buffer = NULL;

  if (!mikmod->initialized) {
    while ((buffer_in = GST_BUFFER (gst_pad_pull (mikmod->sinkpad)))) {
      if (GST_IS_EVENT (buffer_in)) {
        GstEvent *event = GST_EVENT (buffer_in);

        if (GST_EVENT_TYPE (event) == GST_EVENT_EOS)
          break;
      } else {
        if (mikmod->Buffer) {
          mikmod->Buffer = gst_buffer_append (mikmod->Buffer, buffer_in);
        } else {
          mikmod->Buffer = buffer_in;
        }
      }
    }

    if (!GST_PAD_CAPS (mikmod->srcpad)) {
      if (GST_PAD_LINK_SUCCESSFUL (gst_pad_renegotiate (mikmod->srcpad))) {
        GST_ELEMENT_ERROR (mikmod, CORE, NEGOTIATION, (NULL), (NULL));
        return;
      }
    }

    MikMod_RegisterDriver (&drv_gst);
    MikMod_RegisterAllLoaders ();

    MikMod_Init ("");
    reader = GST_READER_new (mikmod);
    module = Player_LoadGeneric (reader, 64, 0);

    gst_buffer_unref (mikmod->Buffer);

    if (!Player_Active ())
      Player_Start (module);

    mikmod->initialized = TRUE;
  }

  if (Player_Active ()) {
    timestamp = (module->sngtime / 1024.0) * GST_SECOND;
    drv_gst.Update ();
  } else {
    gst_element_set_eos (GST_ELEMENT (mikmod));
    gst_pad_push (mikmod->srcpad, GST_DATA (gst_event_new (GST_EVENT_EOS)));
  }
}