C++ (Cpp) connect_thru_mq примеры использования

Пример #1

Файл: resindvdbin.c Проект: zsx/ossbuild

static void
demux_pad_added (GstElement * element, GstPad * pad, RsnDvdBin * dvdbin)
{
  gboolean skip_mq = FALSE;
  GstPad *mq_pad = NULL;
  GstPad *dest_pad = NULL;
  GstCaps *caps;
  GstStructure *s;

  GST_DEBUG_OBJECT (dvdbin, "New pad: %" GST_PTR_FORMAT, pad);

  caps = gst_pad_get_caps (pad);
  if (caps == NULL) {
    GST_WARNING_OBJECT (dvdbin, "NULL caps from pad %" GST_PTR_FORMAT, pad);
    return;
  }
  if (!gst_caps_is_fixed (caps)) {
    GST_WARNING_OBJECT (dvdbin, "Unfixed caps %" GST_PTR_FORMAT
        " on pad %" GST_PTR_FORMAT, caps, pad);
    gst_caps_unref (caps);
    return;
  }

  GST_DEBUG_OBJECT (dvdbin,
      "Pad %" GST_PTR_FORMAT " has caps: %" GST_PTR_FORMAT, pad, caps);

  s = gst_caps_get_structure (caps, 0);
  g_return_if_fail (s != NULL);

  if (can_sink_caps (dvdbin->pieces[DVD_ELEM_VIDDEC], caps)) {
    dest_pad =
        gst_element_get_static_pad (dvdbin->pieces[DVD_ELEM_VIDDEC], "sink");
  } else if (g_str_equal (gst_structure_get_name (s), "video/x-dvd-subpicture")) {
    dest_pad =
        gst_element_get_request_pad (dvdbin->pieces[DVD_ELEM_SPU_SELECT],
        "sink%d");
    skip_mq = TRUE;
  } else if (can_sink_caps (dvdbin->pieces[DVD_ELEM_AUDDEC], caps)) {
    GST_LOG_OBJECT (dvdbin, "Found audio pad w/ caps %" GST_PTR_FORMAT, caps);
    dest_pad =
        gst_element_get_request_pad (dvdbin->pieces[DVD_ELEM_AUD_SELECT],
        "sink%d");
  } else {
    GstStructure *s;

    GST_DEBUG_OBJECT (dvdbin, "Ignoring unusable pad w/ caps %" GST_PTR_FORMAT,
        caps);
    gst_element_post_message (GST_ELEMENT_CAST (dvdbin),
        gst_missing_decoder_message_new (GST_ELEMENT_CAST (dvdbin), caps));

    s = gst_caps_get_structure (caps, 0);
    if (g_str_has_prefix ("video/", gst_structure_get_name (s))) {
      GST_ELEMENT_ERROR (dvdbin, STREAM, CODEC_NOT_FOUND, (NULL),
          ("No MPEG video decoder found"));
    } else {
      GST_ELEMENT_WARNING (dvdbin, STREAM, CODEC_NOT_FOUND, (NULL),
          ("No MPEG video decoder found"));
    }
  }

  gst_caps_unref (caps);

  if (dest_pad == NULL) {
    GST_DEBUG_OBJECT (dvdbin, "Don't know how to handle pad. Ignoring");
    return;
  }

  if (skip_mq) {
    mq_pad = gst_object_ref (pad);
  } else {
    mq_pad = connect_thru_mq (dvdbin, pad);
    if (mq_pad == NULL)
      goto failed;
    GST_DEBUG_OBJECT (dvdbin, "Linking new pad %" GST_PTR_FORMAT
        " through multiqueue to %" GST_PTR_FORMAT, pad, dest_pad);
  }

  gst_pad_link (mq_pad, dest_pad);

  gst_object_unref (mq_pad);
  gst_object_unref (dest_pad);

  return;
failed:
  GST_ELEMENT_ERROR (dvdbin, CORE, FAILED, (NULL),
      ("Failed to handle new demuxer pad %s", GST_PAD_NAME (pad)));
  if (mq_pad)
    gst_object_unref (mq_pad);
  if (dest_pad)
    gst_object_unref (dest_pad);
  return;
}

Пример #2

Файл: resindvdbin.c Проект: prajnashi/gst-plugins-bad

static void
demux_pad_added (GstElement * element, GstPad * pad, RsnDvdBin * dvdbin)
{
  gboolean skip_mq = FALSE;
  GstPad *mq_pad = NULL;
  GstPad *dest_pad = NULL;
  GstCaps *caps;
  GstStructure *s;

  GST_DEBUG_OBJECT (dvdbin, "New pad: %" GST_PTR_FORMAT, pad);

  caps = gst_pad_get_caps (pad);
  if (caps == NULL) {
    GST_WARNING_OBJECT (dvdbin, "NULL caps from pad %" GST_PTR_FORMAT, pad);
    return;
  }
  if (!gst_caps_is_fixed (caps)) {
    GST_WARNING_OBJECT (dvdbin, "Unfixed caps %" GST_PTR_FORMAT
        " on pad %" GST_PTR_FORMAT, caps, pad);
    gst_caps_unref (caps);
    return;
  }

  s = gst_caps_get_structure (caps, 0);
  g_return_if_fail (s != NULL);

  if (g_str_equal (gst_structure_get_name (s), "video/mpeg")) {
    dest_pad =
        gst_element_get_static_pad (dvdbin->pieces[DVD_ELEM_VIDDEC], "sink");
  } else if (g_str_equal (gst_structure_get_name (s), "video/x-dvd-subpicture")) {
    dest_pad =
        gst_element_get_request_pad (dvdbin->pieces[DVD_ELEM_SPU_SELECT],
        "sink%d");
    skip_mq = TRUE;
  } else if (g_str_equal (gst_structure_get_name (s), "audio/x-private1-ac3")) {
    dest_pad =
        gst_element_get_request_pad (dvdbin->pieces[DVD_ELEM_AUD_SELECT],
        "sink%d");
  }

  gst_caps_unref (caps);

  if (dest_pad == NULL) {
    GST_DEBUG_OBJECT (dvdbin, "Don't know how to handle pad. Ignoring");
    return;
  }

  if (skip_mq) {
    mq_pad = gst_object_ref (pad);
  } else {
    mq_pad = connect_thru_mq (dvdbin, pad);
    if (mq_pad == NULL)
      goto failed;
    GST_DEBUG_OBJECT (dvdbin, "Linking new pad %" GST_PTR_FORMAT
        " through multiqueue to %" GST_PTR_FORMAT, pad, dest_pad);
  }

  gst_pad_link (mq_pad, dest_pad);

  gst_object_unref (mq_pad);
  gst_object_unref (dest_pad);

  return;
failed:
  GST_ELEMENT_ERROR (dvdbin, CORE, FAILED, (NULL),
      ("Failed to handle new demuxer pad %s", GST_PAD_NAME (pad)));
  if (mq_pad)
    gst_object_unref (mq_pad);
  if (dest_pad)
    gst_object_unref (dest_pad);
  return;
}