mpegts: Handle ISO 13818 / ITU H.222.0 base extension descriptor

Previously this was hardcoded to the DVB extension descriptors (0x7f), but it
should also be applied for the base specification extension descriptors (0x3f)

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/7172>

girs/GstMpegts-1.0.gir

@@ -1294,7 +1294,7 @@ and other specifications mentioned in the documentation.</doc>
         <type name="guint8" c:type="guint8"/>
       </field>
       <field name="tag_extension" writable="1">
-        <doc xml:space="preserve" filename="../subprojects/gst-plugins-bad/gst-libs/gst/mpegts/gstmpegtsdescriptor.h">the extended type (if @descriptor_tag is 0x7f)</doc>
+        <doc xml:space="preserve" filename="../subprojects/gst-plugins-bad/gst-libs/gst/mpegts/gstmpegtsdescriptor.h">the extended type (if @tag is 0x7f (for DVB) or 0x3f (for H.222.0))</doc>
         <type name="guint8" c:type="guint8"/>
       </field>
       <field name="length" writable="1">
@@ -2497,6 +2497,9 @@ Consult the relevant specifications for more details.</doc>
       </member>
       <member name="stereoscopic_video_info" value="54" c:identifier="GST_MTS_DESC_STEREOSCOPIC_VIDEO_INFO">
       </member>
+      <member name="extension" value="63" c:identifier="GST_MTS_DESC_EXTENSION" version="1.26">
+        <doc xml:space="preserve" filename="../subprojects/gst-plugins-bad/gst-libs/gst/mpegts/gstmpegtsdescriptor.h">Extension Descriptor.</doc>
+      </member>
     </enumeration>
     <record name="DvbMultilingualBouquetNameItem" c:type="GstMpegtsDvbMultilingualBouquetNameItem" glib:type-name="GstMpegtsDvbMultilingualBouquetNameItem" glib:get-type="gst_mpegts_dvb_multilingual_bouquet_name_item_get_type" c:symbol-prefix="dvb_multilingual_bouquet_name_item">
       <doc xml:space="preserve" filename="../subprojects/gst-plugins-bad/gst-libs/gst/mpegts/gst-dvb-descriptor.h">a multilingual bouquet name entry</doc>
@@ -2602,6 +2605,17 @@ Consult the relevant specifications for more details.</doc>
         </array>
       </field>
     </record>
+    <enumeration name="ExtendedDescriptorType" version="1.26" c:type="GstMpegtsExtendedDescriptorType">
+      <doc xml:space="preserve" filename="../subprojects/gst-plugins-bad/gst-libs/gst/mpegts/gstmpegtsdescriptor.h">The type of an extended descriptor
+
+The values correpond to the registered extended descriptor types from the
+base ISO 13818 / ITU H.222.0 specifications
+
+Consult the specification for more details</doc>
+      <source-position filename="../subprojects/gst-plugins-bad/gst-libs/gst/mpegts/gstmpegtsdescriptor.h"/>
+      <member name="mts_desc_ext_jxs_video" value="20" c:identifier="GST_MTS_DESC_EXT_JXS_VIDEO">
+      </member>
+    </enumeration>
     <record name="ExtendedEventDescriptor" c:type="GstMpegtsExtendedEventDescriptor" glib:type-name="GstMpegtsExtendedEventDescriptor" glib:get-type="gst_mpegts_extended_event_descriptor_get_type" c:symbol-prefix="extended_event_descriptor">
       <doc xml:space="preserve" filename="../subprojects/gst-plugins-bad/gst-libs/gst/mpegts/gst-dvb-descriptor.h">Extended Event Descriptor (EN 300 468 v.1.13.1)</doc>
       <source-position filename="../subprojects/gst-plugins-bad/gst-libs/gst/mpegts/gst-dvb-descriptor.h"/>

subprojects/gst-plugins-bad/gst-libs/gst/mpegts/gstmpegts-private.h

@@ -80,7 +80,7 @@ G_GNUC_INTERNAL gpointer __common_section_checks (GstMpegtsSection *section,
     GST_WARNING ("Descriptor is empty (data field == NULL)");           \
     return retval;                                                      \
   }                                                                     \
-  if (G_UNLIKELY ((desc)->tag != 0x7f) ||                               \
+  if (G_UNLIKELY (((desc)->tag != 0x7f) && ((desc)->tag != 0x3f)) ||	\
     ((desc)->tag_extension != (tagexttype))) {                          \
     GST_WARNING ("Wrong descriptor type (Got 0x%02x, expected 0x%02x)", \
                  (desc)->tag_extension, tagexttype);                    \

subprojects/gst-plugins-bad/gst-libs/gst/mpegts/gstmpegtsdescriptor.c

@@ -794,7 +794,8 @@ gst_mpegts_parse_descriptors (guint8 * buffer, gsize buf_len)
     GST_LOG ("descriptor 0x%02x length:%d", desc->tag, desc->length);
     GST_MEMDUMP ("descriptor", desc->data + 2, desc->length);
     /* extended descriptors */
-    if (G_UNLIKELY (desc->tag == 0x7f))
+    if (G_UNLIKELY (desc->tag == GST_MTS_DESC_DVB_EXTENSION
+            || desc->tag == GST_MTS_DESC_EXTENSION))
       desc->tag_extension = *data;
 
     data += desc->length;

subprojects/gst-plugins-bad/gst-libs/gst/mpegts/gstmpegtsdescriptor.h

@@ -135,9 +135,33 @@ typedef enum {
   GST_MTS_DESC_STEREOSCOPIC_PROGRAM_INFO        = 0x35,
   GST_MTS_DESC_STEREOSCOPIC_VIDEO_INFO          = 0x36,
 
+  /**
+   * GST_MTS_DESC_EXTENSION:
+   *
+   * Extension Descriptor.
+   *
+   * Since: 1.26
+   */
+  GST_MTS_DESC_EXTENSION                        = 0x3f
   /* 55-63 ITU-T Rec. H.222.0 | ISO/IEC 13818-1 Reserved */
 } GstMpegtsDescriptorType;
 
+/**
+ * GstMpegtsExtendedDescriptorType:
+ *
+ * The type of an extended descriptor
+ *
+ * The values correpond to the registered extended descriptor types from the
+ * base ISO 13818 / ITU H.222.0 specifications
+ *
+ * Consult the specification for more details
+ *
+ * Since: 1.26
+ */
+typedef enum {
+  GST_MTS_DESC_EXT_JXS_VIDEO                    = 0x14,
+} GstMpegtsExtendedDescriptorType;
+
 /**
  * GstMpegtsMiscDescriptorType:
  *
@@ -180,7 +204,7 @@ GType gst_mpegts_descriptor_get_type (void);
 /**
  * GstMpegtsDescriptor:
  * @tag: the type of descriptor
- * @tag_extension: the extended type (if @descriptor_tag is 0x7f)
+ * @tag_extension: the extended type (if @tag is 0x7f (for DVB) or 0x3f (for H.222.0))
  * @length: the length of the descriptor content (excluding tag/length field)
  * @data: the full descriptor data (including tag, extension, length). The first
  * two bytes are the @tag and @length.

subprojects/gst-plugins-bad/tests/examples/mpegts/ts-parser.c

@@ -87,7 +87,11 @@ descriptor_name (GstMpegtsDescriptor * desc)
   gint val = desc->tag;
 
   /* Treat extended descriptors */
-  if (val == 0x7f) {
+  if (val == 0x3f) {
+    en = g_enum_get_value (G_ENUM_CLASS (g_type_class_peek
+            (GST_TYPE_MPEGTS_EXTENDED_DESCRIPTOR_TYPE)), desc->tag_extension);
+  }
+  if (en == NULL && val == 0x7f) {
     en = g_enum_get_value (G_ENUM_CLASS (g_type_class_peek
             (GST_TYPE_MPEGTS_DVB_EXTENDED_DESCRIPTOR_TYPE)),
         desc->tag_extension);