1 files changed, 123 insertions, 0 deletions
diff --git a/gst-libs/gst/video/gstvideometa.c b/gst-libs/gst/video/gstvideometa.c
index 739e9f4c3..8940beec1 100644
--- a/gst-libs/gst/video/gstvideometa.c
+++ b/gst-libs/gst/video/gstvideometa.c
@@ -18,6 +18,7 @@
  */
 
 #include "gstvideometa.h"
+#include "video-anc.h"
 
 #include <string.h>
 
@@ -1052,3 +1053,125 @@ gst_buffer_add_video_time_code_meta_full (GstBuffer * buffer, guint fps_n,
 
   return meta;
 }
+
+/* Closed Caption Meta implementation *******************************************/
+
+GType
+gst_video_caption_meta_api_get_type (void)
+{
+  static volatile GType type;
+
+  if (g_once_init_enter (&type)) {
+    static const gchar *tags[] = { NULL };
+    GType _type = gst_meta_api_type_register ("GstVideoCaptionMetaAPI", tags);
+    GST_INFO ("registering");
+    g_once_init_leave (&type, _type);
+  }
+  return type;
+}
+
+
+static gboolean
+gst_video_caption_meta_transform (GstBuffer * dest, GstMeta * meta,
+    GstBuffer * buffer, GQuark type, gpointer data)
+{
+  GstVideoCaptionMeta *dmeta, *smeta;
+
+  if (GST_META_TRANSFORM_IS_COPY (type)) {
+    smeta = (GstVideoCaptionMeta *) meta;
+
+    GST_DEBUG ("copy caption metadata");
+    dmeta =
+        gst_buffer_add_video_caption_meta (dest, smeta->caption_type,
+        smeta->data, smeta->size);
+    if (!dmeta)
+      return FALSE;
+  } else {
+    /* return FALSE, if transform type is not supported */
+    return FALSE;
+  }
+  return TRUE;
+}
+
+static gboolean
+gst_video_caption_meta_init (GstMeta * meta, gpointer params,
+    GstBuffer * buffer)
+{
+  GstVideoCaptionMeta *emeta = (GstVideoCaptionMeta *) meta;
+
+  emeta->caption_type = GST_VIDEO_CAPTION_TYPE_UNKNOWN;
+
+  return TRUE;
+}
+
+static void
+gst_video_caption_meta_free (GstMeta * meta, GstBuffer * buffer)
+{
+  GstVideoCaptionMeta *emeta = (GstVideoCaptionMeta *) meta;
+
+  g_free (emeta->data);
+}
+
+const GstMetaInfo *
+gst_video_caption_meta_get_info (void)
+{
+  static const GstMetaInfo *meta_info = NULL;
+
+  if (g_once_init_enter ((GstMetaInfo **) & meta_info)) {
+    const GstMetaInfo *mi = gst_meta_register (GST_VIDEO_CAPTION_META_API_TYPE,
+        "GstVideoCaptionMeta",
+        sizeof (GstVideoCaptionMeta),
+        gst_video_caption_meta_init,
+        gst_video_caption_meta_free,
+        gst_video_caption_meta_transform);
+    g_once_init_leave ((GstMetaInfo **) & meta_info, (GstMetaInfo *) mi);
+  }
+  return meta_info;
+}
+
+/**
+ * gst_buffer_add_video_caption_meta:
+ * @buffer: a #GstBuffer
+ * @caption_type: The type of Closed Caption to add
+ * @data: The Closed Caption data
+ * @size: The size of @data in bytes
+ *
+ * Attaches #GstVideoCaptionMeta metadata to @buffer with the given
+ * parameters.
+ *
+ * Returns: (transfer none): the #GstVideoCaptionMeta on @buffer.
+ *
+ * Since: 1.16
+ */
+GstVideoCaptionMeta *
+gst_buffer_add_video_caption_meta (GstBuffer * buffer,
+    GstVideoCaptionType caption_type, const guint8 * data, gsize size)
+{
+  GstVideoCaptionMeta *meta;
+
+  g_return_val_if_fail (GST_IS_BUFFER (buffer), NULL);
+  g_return_val_if_fail (data != NULL, NULL);
+  g_return_val_if_fail (size > 0, NULL);
+
+  switch (caption_type) {
+    case GST_VIDEO_CAPTION_TYPE_CEA608_RAW:
+    case GST_VIDEO_CAPTION_TYPE_CEA608_IN_CEA708_RAW:
+    case GST_VIDEO_CAPTION_TYPE_CEA708_RAW:
+    case GST_VIDEO_CAPTION_TYPE_CEA708_CDP:
+      break;
+    default:
+      GST_ERROR ("Unknown caption type !");
+      return NULL;
+  }
+  /* FIXME : Add checks for content ? */
+
+  meta = (GstVideoCaptionMeta *) gst_buffer_add_meta (buffer,
+      GST_VIDEO_CAPTION_META_INFO, NULL);
+  g_return_val_if_fail (meta != NULL, NULL);
+
+  meta->caption_type = caption_type;
+  meta->data = g_memdup (data, size);
+  meta->size = size;
+
+  return meta;
+}