videoparseutils: Store multiple user data unregistered messages

A frame can have multiple unregistered messages attached. We need to
store them all.

For: https://gitlab.freedesktop.org/gstreamer/gstreamer/-/issues/3008
Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/5450>

subprojects/gst-plugins-bad/gst/videoparsers/gsth264parse.c

@@ -235,7 +235,8 @@ gst_h264_parse_finalize (GObject * object)
 {
   GstH264Parse *h264parse = GST_H264_PARSE (object);
 
-  gst_video_clear_user_data_unregistered (&h264parse->user_data_unregistered);
+  gst_video_clear_user_data_unregistered (&h264parse->user_data_unregistered,
+      TRUE);
 
   g_object_unref (h264parse->frame_out);
   g_array_unref (h264parse->nal_backlog);
@@ -263,7 +264,8 @@ gst_h264_parse_reset_frame (GstH264Parse * h264parse)
   h264parse->have_aud_in_frame = FALSE;
   gst_adapter_clear (h264parse->frame_out);
   gst_video_clear_user_data (&h264parse->user_data);
-  gst_video_clear_user_data_unregistered (&h264parse->user_data_unregistered);
+  gst_video_clear_user_data_unregistered (&h264parse->user_data_unregistered,
+      FALSE);
 }
 
 static void

subprojects/gst-plugins-bad/gst/videoparsers/gsth265parse.c

@@ -182,7 +182,8 @@ gst_h265_parse_finalize (GObject * object)
 {
   GstH265Parse *h265parse = GST_H265_PARSE (object);
 
-  gst_video_clear_user_data_unregistered (&h265parse->user_data_unregistered);
+  gst_video_clear_user_data_unregistered (&h265parse->user_data_unregistered,
+      TRUE);
 
   g_object_unref (h265parse->frame_out);
 
@@ -209,7 +210,8 @@ gst_h265_parse_reset_frame (GstH265Parse * h265parse)
   h265parse->have_pps_in_frame = FALSE;
   gst_adapter_clear (h265parse->frame_out);
   gst_video_clear_user_data (&h265parse->user_data);
-  gst_video_clear_user_data_unregistered (&h265parse->user_data_unregistered);
+  gst_video_clear_user_data_unregistered (&h265parse->user_data_unregistered,
+      FALSE);
 }
 
 static void

subprojects/gst-plugins-bad/gst/videoparsers/gstvideoparseutils.c

@@ -39,6 +39,9 @@ static gboolean gst_video_parse_utils_parse_bar (const guint8 * data,
 static gboolean gst_video_parse_utils_parse_afd (const guint8 data,
     GstVideoAFDSpec spec, GstVideoParseUtilsField field, GstVideoAFD * afd);
 
+static void gst_video_clear_unregistered_message
+    (GstVideoUnregisteredMessage * msg);
+
 
 /*
  * gst_video_parse_user_data:
@@ -465,14 +468,23 @@ gst_video_parse_user_data_unregistered (GstElement * elt,
     GstVideoParseUserDataUnregistered * user_data,
     GstByteReader * br, guint8 uuid[16])
 {
-  gst_video_clear_user_data_unregistered (user_data);
+  GstVideoUnregisteredMessage msg;
 
-  memcpy (&user_data->uuid, uuid, 16);
+  memcpy (&msg.uuid, uuid, 16);
 
-  user_data->size = gst_byte_reader_get_size (br);
-  if (!gst_byte_reader_dup_data (br, user_data->size, &user_data->data)) {
+  msg.size = gst_byte_reader_get_size (br);
+  if (!gst_byte_reader_dup_data (br, msg.size, &msg.data)) {
     g_return_if_reached ();
   }
+
+  if (user_data->messages == NULL) {
+    user_data->messages = g_array_sized_new (FALSE, TRUE,
+        sizeof (GstVideoUnregisteredMessage), 3);
+    g_array_set_clear_func (user_data->messages,
+        (GDestroyNotify) gst_video_clear_unregistered_message);
+  }
+
+  g_array_append_val (user_data->messages, msg);
 }
 
 /*
@@ -481,27 +493,52 @@ gst_video_parse_user_data_unregistered (GstElement * elt,
  * @user_data: #GstVideoParseUserDataUnregistered holding SEI User Data Unregistered
  * @buf: (transfer none): #GstBuffer that receives the unregistered data
  *
- * Attach unregistered user data from @user_data to @buf as
+ * Attach unregistered messages from @user_data to @buf as
  * GstVideoSEIUserDataUnregisteredMeta
  */
 void
 gst_video_push_user_data_unregistered (GstElement * elt,
     GstVideoParseUserDataUnregistered * user_data, GstBuffer * buf)
 {
-  if (user_data->data != NULL) {
-    gst_buffer_add_video_sei_user_data_unregistered_meta (buf, user_data->uuid,
-        user_data->data, user_data->size);
+  GArray *messages = user_data->messages;
+  guint i;
+
+  if (messages == NULL)
+    return;
+
+  for (i = 0; i < messages->len; i++) {
+    GstVideoUnregisteredMessage *msg =
+        &g_array_index (messages, GstVideoUnregisteredMessage, i);
+
+    gst_buffer_add_video_sei_user_data_unregistered_meta (buf, msg->uuid,
+        msg->data, msg->size);
   }
 }
 
 /*
  * gst_video_clear_user_data_unregistered:
  * @user_data: #GstVideoParseUserDataUnregistered holding SEI User Data Unregistered
+ * @free: Whether to deallocate memory resources
  *
  * Clears the user data unregistered, resetting it for the next frame
  */
 void gst_video_clear_user_data_unregistered
-    (GstVideoParseUserDataUnregistered * user_data)
+    (GstVideoParseUserDataUnregistered * user_data, gboolean free)
+{
+  if (free)
+    g_clear_pointer (&user_data->messages, g_array_unref);
+  else if (user_data->messages != NULL)
+    g_array_set_size (user_data->messages, 0);
+}
+
+/*
+ * gst_video_clear_unregistered_message:
+ * @msg: #GstVideoUnregisteredMessage holding a single SEI User Data Unregistered
+ *
+ * Clears the message, freeing the data
+ */
+static void
+gst_video_clear_unregistered_message (GstVideoUnregisteredMessage * msg)
 {
   memset (&msg->uuid, 0, sizeof msg->uuid);
   g_clear_pointer (&msg->data, g_free);

subprojects/gst-plugins-bad/gst/videoparsers/gstvideoparseutils.h

@@ -173,10 +173,20 @@ typedef struct
  */
 typedef struct
 {
+  /* item type: GstVideoUnregisteredMessage */
+  GArray *messages;
+} GstVideoParseUserDataUnregistered;
+
+/*
+ * GstVideoUnregisteredMessage
+ *
+ * Item type for the unregistered user data.
+ */
+typedef struct {
   guint8 uuid[16];
   guint8 *data;
   gsize size;
-} GstVideoParseUserDataUnregistered;
+} GstVideoUnregisteredMessage;
 
 G_BEGIN_DECLS