C++ (Cpp) MXF_METADATA_GENERIC_PICTURE_ESSENCE_DESCRIPTOR示例

示例#1

文件： mxfdv-dif.c 项目： collects/gst-plugins-bad

static GstCaps *
mxf_dv_dif_create_caps (MXFMetadataTimelineTrack * track, GstTagList ** tags,
    MXFEssenceElementHandleFunc * handler, gpointer * mapping_data)
{
  GstCaps *caps = NULL;
  guint i;
  MXFMetadataGenericPictureEssenceDescriptor *d = NULL;

  g_return_val_if_fail (track != NULL, NULL);

  if (track->parent.descriptor == NULL) {
    GST_ERROR ("No descriptor found for this track");
    return NULL;
  }

  for (i = 0; i < track->parent.n_descriptor; i++) {
    if (MXF_IS_METADATA_GENERIC_PICTURE_ESSENCE_DESCRIPTOR (track->
            parent.descriptor[i])) {
      d = MXF_METADATA_GENERIC_PICTURE_ESSENCE_DESCRIPTOR (track->
          parent.descriptor[i]);
      break;
    }
  }

  *handler = mxf_dv_dif_handle_essence_element;
  /* SMPTE 383M 8 */

  /* TODO: might be video or audio only, use values of the generic sound/picture
   * descriptor in the caps in that case
   */
  GST_DEBUG ("Found DV-DIF stream");
  caps =
      gst_caps_new_simple ("video/x-dv", "systemstream", G_TYPE_BOOLEAN, TRUE,
      NULL);

  if (d)
    mxf_metadata_generic_picture_essence_descriptor_set_caps (d, caps);

  if (!*tags)
    *tags = gst_tag_list_new_empty ();

  gst_tag_list_add (*tags, GST_TAG_MERGE_APPEND, GST_TAG_CODEC, "DV-DIF", NULL);

  return caps;
}

示例#2

文件： mxfvc3.c 项目： Distrotech/gst-plugins-bad

static gboolean
mxf_is_vc3_essence_track (const MXFMetadataTimelineTrack * track)
{
  guint i;

  g_return_val_if_fail (track != NULL, FALSE);

  if (track->parent.descriptor == NULL)
    return FALSE;

  for (i = 0; i < track->parent.n_descriptor; i++) {
    MXFMetadataFileDescriptor *d = track->parent.descriptor[i];
    MXFUL *key;

    if (!d)
      continue;

    key = &d->essence_container;
    /* SMPTE S2019-4 7 */
    if (mxf_is_generic_container_essence_container_label (key) &&
        key->u[12] == 0x02 && key->u[13] == 0x11 &&
        (key->u[14] == 0x01 || key->u[14] == 0x02)) {
      return TRUE;
    } else if (mxf_is_avid_essence_container_label (key)) {
      MXFMetadataGenericPictureEssenceDescriptor *p;

      if (!MXF_IS_METADATA_GENERIC_PICTURE_ESSENCE_DESCRIPTOR (d))
        return FALSE;
      p = MXF_METADATA_GENERIC_PICTURE_ESSENCE_DESCRIPTOR (d);

      key = &p->picture_essence_coding;
      if (mxf_ul_is_subclass (&picture_essence_coding_vc3_avid, key))
        return TRUE;
    }
  }

  return FALSE;
}