mpegts: add multilingual component descriptor

https://bugzilla.gnome.org/show_bug.cgi?id=728429

2 files changed, 76 insertions, 0 deletions

diff --git a/gst-libs/gst/mpegts/gst-dvb-descriptor.c b/gst-libs/gst/mpegts/gst-dvb-descriptor.c
index 45de0f867..7e09c5351 100644
--- a/gst-libs/gst/mpegts/gst-dvb-descriptor.c
+++ b/gst-libs/gst/mpegts/gst-dvb-descriptor.c
@@ -1546,6 +1546,65 @@ gst_mpegts_descriptor_parse_dvb_multilingual_service_name (const
   return TRUE;
 }
 
+/* GST_MTS_DESC_DVB_MULTILINGUAL_COMPONENT (0x5E) */
+static void
+    _gst_mpegts_dvb_multilingual_component_item_free
+    (GstMpegTsDvbMultilingualComponentItem * item)
+{
+  g_slice_free (GstMpegTsDvbMultilingualComponentItem, item);
+}
+
+/**
+ * gst_mpegts_descriptor_parse_dvb_multilingual_component:
+ * @descriptor: a %GST_MTS_DESC_DVB_MULTILINGUAL_COMPONENT
+ * #GstMpegTsDescriptor
+ * @component_tag: the component tag
+ * @component_description_items: (out) (element-type GstMpegTsDvbMultilingualComponentItem):
+ * a #GstMpegTsDvbMultilingualComponentItem
+ *
+ * Parses out the multilingual component from the @descriptor.
+ *
+ * Returns: %TRUE if the parsing happened correctly, else %FALSE.
+ */
+gboolean
+gst_mpegts_descriptor_parse_dvb_multilingual_component (const
+    GstMpegTsDescriptor * descriptor, guint8 * component_tag,
+    GPtrArray ** component_description_items)
+{
+  guint8 *data, i, len;
+  GstMpegTsDvbMultilingualComponentItem *item;
+
+  g_return_val_if_fail (descriptor != NULL
+      && component_description_items != NULL && component_tag != NULL, FALSE);
+  __common_desc_checks (descriptor, GST_MTS_DESC_DVB_MULTILINGUAL_COMPONENT, 6,
+      FALSE);
+
+  data = (guint8 *) descriptor->data + 2;
+
+  *component_tag = *data;
+  data += 1;
+
+  *component_description_items =
+      g_ptr_array_new_with_free_func ((GDestroyNotify)
+      _gst_mpegts_dvb_multilingual_component_item_free);
+
+  for (i = 0; i < descriptor->length - 3;) {
+    item = g_slice_new0 (GstMpegTsDvbMultilingualComponentItem);
+    g_ptr_array_add (*component_description_items, item);
+    memcpy (data, item->language_code, 3);
+    data += 3;
+    i += 3;
+
+    len = *data;
+    item->description =
+        get_encoding_and_convert ((const gchar *) data + 1, len);
+    data += len + 1;
+    i += len + 1;
+  }
+
+  return TRUE;
+}
+
 /* GST_MTS_DESC_DVB_PRIVATE_DATA_SPECIFIER (0x5F) */
 /**
  * gst_mpegts_descriptor_parse_dvb_private_data_specifier:
diff --git a/gst-libs/gst/mpegts/gst-dvb-descriptor.h b/gst-libs/gst/mpegts/gst-dvb-descriptor.h
index c93657296..edf5309f6 100644
--- a/gst-libs/gst/mpegts/gst-dvb-descriptor.h
+++ b/gst-libs/gst/mpegts/gst-dvb-descriptor.h
@@ -715,6 +715,23 @@ struct _GstMpegTsDvbMultilingualServiceNameItem
 gboolean gst_mpegts_descriptor_parse_dvb_multilingual_service_name (const GstMpegTsDescriptor
               *descriptor, GPtrArray ** service_name_items);
 
+/* GST_MTS_DESC_DVB_MULTILINGUAL_COMPONENT (0x5E) */
+typedef struct _GstMpegTsDvbMultilingualComponentItem GstMpegTsDvbMultilingualComponentItem;
+
+/**
+ * GstMpegTsDvbMultilingualComponentItem:
+ * @language_code: the ISO 639 language code
+ * @description: the component description
+ */
+struct _GstMpegTsDvbMultilingualComponentItem
+{
+  gchar language_code[3];
+  gchar *description;
+};
+
+gboolean gst_mpegts_descriptor_parse_dvb_multilingual_component (const GstMpegTsDescriptor
+              *descriptor, guint8 * component_tag, GPtrArray ** component_description_items);
+
 /* GST_MTS_DESC_DVB_PRIVATE_DATA_SPECIFIER (0x5F) */
 gboolean gst_mpegts_descriptor_parse_dvb_private_data_specifier (const GstMpegTsDescriptor
               * descriptor, guint32 * private_data_specifier, guint8 ** private_data,