X-Git-Url: http://review.tizen.org/git/?a=blobdiff_plain;f=gst%2Fgstbuffer.c;h=19a70b417bbaaa985ef0393033d439d8817dde76;hb=dac5966da6a0f53d0443dfa1ac239289028c415d;hp=7d51c6d2edef543e4449c906a1261d952c99c326;hpb=a87b4551a6090663a1714f263d4e20fe75eb46ca;p=platform%2Fupstream%2Fgstreamer.git

diff --git a/gst/gstbuffer.c b/gst/gstbuffer.c
index 7d51c6d..19a70b4 100644
--- a/gst/gstbuffer.c
+++ b/gst/gstbuffer.c
@@ -113,7 +113,7 @@
  * Typically, #GstParentBufferMeta is used when the child buffer is directly
  * using the #GstMemory of the parent buffer, and wants to prevent the parent
  * buffer from being returned to a buffer pool until the #GstMemory is available
- * for re-use. (Since 1.6)
+ * for re-use. (Since: 1.6)
  *
  */
 #include "gst_private.h"
@@ -133,14 +133,9 @@
 
 GType _gst_buffer_type = 0;
 
-typedef struct _GstMetaItem GstMetaItem;
-
-struct _GstMetaItem
-{
-  GstMetaItem *next;
-  GstMeta meta;
-};
-#define ITEM_SIZE(info) ((info)->size + sizeof (GstMetaItem))
+/* info->size will be sizeof(FooMeta) which contains a GstMeta at the beginning
+ * too, and then there is again a GstMeta in GstMetaItem, so subtract one. */
+#define ITEM_SIZE(info) ((info)->size + sizeof (GstMetaItem) - sizeof (GstMeta))
 
 #define GST_BUFFER_MEM_MAX         16
 
@@ -150,6 +145,7 @@ struct _GstMetaItem
 #define GST_BUFFER_MEM_PTR(b,i)    (((GstBufferImpl *)(b))->mem[i])
 #define GST_BUFFER_BUFMEM(b)       (((GstBufferImpl *)(b))->bufmem)
 #define GST_BUFFER_META(b)         (((GstBufferImpl *)(b))->item)
+#define GST_BUFFER_TAIL_META(b)    (((GstBufferImpl *)(b))->tail_item)
 
 typedef struct
 {
@@ -167,8 +163,41 @@ typedef struct
   /* FIXME, make metadata allocation more efficient by using part of the
    * GstBufferImpl */
   GstMetaItem *item;
+  GstMetaItem *tail_item;
 } GstBufferImpl;
 
+static gint64 meta_seq;         /* 0 *//* ATOMIC */
+
+/* TODO: use GLib's once https://gitlab.gnome.org/GNOME/glib/issues/1076 lands */
+#if defined(__GCC_HAVE_SYNC_COMPARE_AND_SWAP_8)
+static inline gint64
+gst_atomic_int64_inc (volatile gint64 * atomic)
+{
+  return __sync_fetch_and_add (atomic, 1);
+}
+#elif defined (G_PLATFORM_WIN32)
+#include <windows.h>
+static inline gint64
+gst_atomic_int64_inc (volatile gint64 * atomic)
+{
+  return InterlockedExchangeAdd64 (atomic, 1);
+}
+#else
+#warning No 64-bit atomic int defined for this platform/toolchain!
+#define NO_64BIT_ATOMIC_INT_FOR_PLATFORM
+G_LOCK_DEFINE_STATIC (meta_seq);
+static inline gint64
+gst_atomic_int64_inc (volatile gint64 * atomic)
+{
+  gint64 ret;
+
+  G_LOCK (meta_seq);
+  ret = *atomic++;
+  G_UNLOCK (meta_seq);
+
+  return ret;
+}
+#endif
 
 static gboolean
 _is_span (GstMemory ** mem, gsize len, gsize * poffset, GstMemory ** parent)
@@ -288,11 +317,15 @@ _replace_memory (GstBuffer * buffer, guint len, guint idx, guint length,
     GstMemory *old = GST_BUFFER_MEM_PTR (buffer, i);
 
     gst_memory_unlock (old, GST_LOCK_FLAG_EXCLUSIVE);
+    gst_mini_object_remove_parent (GST_MINI_OBJECT_CAST (old),
+        GST_MINI_OBJECT_CAST (buffer));
     gst_memory_unref (old);
   }
 
   if (mem != NULL) {
     /* replace with single memory */
+    gst_mini_object_add_parent (GST_MINI_OBJECT_CAST (mem),
+        GST_MINI_OBJECT_CAST (buffer));
     gst_memory_lock (mem, GST_LOCK_FLAG_EXCLUSIVE);
     GST_BUFFER_MEM_PTR (buffer, idx) = mem;
     idx++;
@@ -435,6 +468,8 @@ _memory_add (GstBuffer * buffer, gint idx, GstMemory * mem)
   /* and insert the new buffer */
   GST_BUFFER_MEM_PTR (buffer, idx) = mem;
   GST_BUFFER_MEM_LEN (buffer) = len + 1;
+  gst_mini_object_add_parent (GST_MINI_OBJECT_CAST (mem),
+      GST_MINI_OBJECT_CAST (buffer));
 
   GST_BUFFER_FLAG_SET (buffer, GST_BUFFER_FLAG_TAG_MEMORY);
 }
@@ -445,6 +480,11 @@ void
 _priv_gst_buffer_initialize (void)
 {
   _gst_buffer_type = gst_buffer_get_type ();
+
+#ifdef NO_64BIT_ATOMIC_INT_FOR_PLATFORM
+  GST_CAT_WARNING (GST_CAT_PERFORMANCE,
+      "No 64-bit atomic int defined for this platform/toolchain!");
+#endif
 }
 
 /**
@@ -746,6 +786,8 @@ _gst_buffer_free (GstBuffer * buffer)
   len = GST_BUFFER_MEM_LEN (buffer);
   for (i = 0; i < len; i++) {
     gst_memory_unlock (GST_BUFFER_MEM_PTR (buffer, i), GST_LOCK_FLAG_EXCLUSIVE);
+    gst_mini_object_remove_parent (GST_MINI_OBJECT_CAST (GST_BUFFER_MEM_PTR
+            (buffer, i)), GST_MINI_OBJECT_CAST (buffer));
     gst_memory_unref (GST_BUFFER_MEM_PTR (buffer, i));
   }
 
@@ -968,6 +1010,33 @@ gst_buffer_new_wrapped (gpointer data, gsize size)
 }
 
 /**
+ * gst_buffer_new_wrapped_bytes:
+ * @bytes: (transfer none): a #GBytes to wrap
+ *
+ * Creates a new #GstBuffer that wraps the given @bytes. The data inside
+ * @bytes cannot be %NULL and the resulting buffer will be marked as read only.
+ *
+ * MT safe.
+ *
+ * Returns: (transfer full): a new #GstBuffer wrapping @bytes
+ *
+ * Since: 1.16
+ */
+GstBuffer *
+gst_buffer_new_wrapped_bytes (GBytes * bytes)
+{
+  guint8 *bytes_data;
+  gsize size;
+
+  g_return_val_if_fail (bytes != NULL, NULL);
+  bytes_data = (guint8 *) g_bytes_get_data (bytes, &size);
+  g_return_val_if_fail (bytes_data != NULL, NULL);
+
+  return gst_buffer_new_wrapped_full (GST_MEMORY_FLAG_READONLY, bytes_data,
+      size, 0, size, g_bytes_ref (bytes), (GDestroyNotify) g_bytes_unref);
+}
+
+/**
  * gst_buffer_n_memory:
  * @buffer: a #GstBuffer.
  *
@@ -1060,10 +1129,14 @@ _get_mapped (GstBuffer * buffer, guint idx, GstMapInfo * info,
 
   if (mapped != mem) {
     /* memory changed, lock new memory */
+    gst_mini_object_add_parent (GST_MINI_OBJECT_CAST (mapped),
+        GST_MINI_OBJECT_CAST (buffer));
     gst_memory_lock (mapped, GST_LOCK_FLAG_EXCLUSIVE);
     GST_BUFFER_MEM_PTR (buffer, idx) = mapped;
     /* unlock old memory */
     gst_memory_unlock (mem, GST_LOCK_FLAG_EXCLUSIVE);
+    gst_mini_object_remove_parent (GST_MINI_OBJECT_CAST (mem),
+        GST_MINI_OBJECT_CAST (buffer));
     GST_BUFFER_FLAG_SET (buffer, GST_BUFFER_FLAG_TAG_MEMORY);
   }
   gst_memory_unref (mem);
@@ -1080,7 +1153,7 @@ _get_mapped (GstBuffer * buffer, guint idx, GstMapInfo * info,
  * the memory block in @buffer is removed, replaced or merged, typically with
  * any call that modifies the memory in @buffer.
  *
- * Returns: (transfer none): the #GstMemory at @idx.
+ * Returns: (transfer none) (nullable): the #GstMemory at @idx.
  */
 GstMemory *
 gst_buffer_peek_memory (GstBuffer * buffer, guint idx)
@@ -1101,7 +1174,7 @@ gst_buffer_peek_memory (GstBuffer * buffer, guint idx)
  *
  * Get the memory block at index @idx in @buffer.
  *
- * Returns: (transfer full): a #GstMemory that contains the data of the
+ * Returns: (transfer full) (nullable): a #GstMemory that contains the data of the
  * memory block at @idx. Use gst_memory_unref () after usage.
  */
 GstMemory *
@@ -1117,7 +1190,7 @@ gst_buffer_get_memory (GstBuffer * buffer, guint idx)
  * Get all the memory block in @buffer. The memory blocks will be merged
  * into one large #GstMemory.
  *
- * Returns: (transfer full): a #GstMemory that contains the merged memory.
+ * Returns: (transfer full) (nullable): a #GstMemory that contains the merged memory.
  * Use gst_memory_unref () after usage.
  */
 GstMemory *
@@ -1137,7 +1210,7 @@ gst_buffer_get_all_memory (GstBuffer * buffer)
  *
  * If @length is -1, all memory starting from @idx is merged.
  *
- * Returns: (transfer full): a #GstMemory that contains the merged data of @length
+ * Returns: (transfer full) (nullable): a #GstMemory that contains the merged data of @length
  *    blocks starting at @idx. Use gst_memory_unref () after usage.
  */
 GstMemory *
@@ -1633,9 +1706,13 @@ gst_buffer_resize_range (GstBuffer * buffer, guint idx, gint length,
         if (newmem == NULL)
           return FALSE;
 
+        gst_mini_object_add_parent (GST_MINI_OBJECT_CAST (newmem),
+            GST_MINI_OBJECT_CAST (buffer));
         gst_memory_lock (newmem, GST_LOCK_FLAG_EXCLUSIVE);
         GST_BUFFER_MEM_PTR (buffer, i) = newmem;
         gst_memory_unlock (mem, GST_LOCK_FLAG_EXCLUSIVE);
+        gst_mini_object_remove_parent (GST_MINI_OBJECT_CAST (mem),
+            GST_MINI_OBJECT_CAST (buffer));
         gst_memory_unref (mem);
 
         GST_BUFFER_FLAG_SET (buffer, GST_BUFFER_FLAG_TAG_MEMORY);
@@ -1757,7 +1834,7 @@ gst_buffer_map_range (GstBuffer * buffer, guint idx, gint length,
   /* ERROR */
 not_writable:
   {
-    GST_WARNING_OBJECT (buffer, "write map requested on non-writable buffer");
+    GST_WARNING ("write map requested on non-writable buffer");
     g_critical ("write map requested on non-writable buffer");
     memset (info, 0, sizeof (GstMapInfo));
     return FALSE;
@@ -1765,13 +1842,13 @@ not_writable:
 no_memory:
   {
     /* empty buffer, we need to return NULL */
-    GST_DEBUG_OBJECT (buffer, "can't get buffer memory");
+    GST_DEBUG ("can't get buffer memory");
     memset (info, 0, sizeof (GstMapInfo));
     return TRUE;
   }
 cannot_map:
   {
-    GST_DEBUG_OBJECT (buffer, "cannot map memory");
+    GST_DEBUG ("cannot map memory");
     memset (info, 0, sizeof (GstMapInfo));
     return FALSE;
   }
@@ -1854,7 +1931,8 @@ gst_buffer_fill (GstBuffer * buffer, gsize offset, gconstpointer src,
  * gst_buffer_extract:
  * @buffer: a #GstBuffer.
  * @offset: the offset to extract
- * @dest: the destination address
+ * @dest: (out caller-allocates) (array length=size) (element-type guint8):
+ *     the destination address
  * @size: the size to extract
  *
  * Copy @size bytes starting from @offset in @buffer to @dest.
@@ -2094,6 +2172,8 @@ gst_buffer_append_region (GstBuffer * buf1, GstBuffer * buf2, gssize offset,
     GstMemory *mem;
 
     mem = GST_BUFFER_MEM_PTR (buf2, i);
+    gst_mini_object_remove_parent (GST_MINI_OBJECT_CAST (mem),
+        GST_MINI_OBJECT_CAST (buf2));
     GST_BUFFER_MEM_PTR (buf2, i) = NULL;
     _memory_add (buf1, -1, mem);
   }
@@ -2140,6 +2220,28 @@ gst_buffer_get_meta (GstBuffer * buffer, GType api)
 }
 
 /**
+ * gst_buffer_get_n_meta:
+ * @buffer: a #GstBuffer
+ * @api_type: the #GType of an API
+ *
+ * Returns: number of metas of type @api_type on @buffer.
+ *
+ * Since: 1.14
+ */
+guint
+gst_buffer_get_n_meta (GstBuffer * buffer, GType api_type)
+{
+  gpointer state = NULL;
+  GstMeta *meta;
+  guint n = 0;
+
+  while ((meta = gst_buffer_iterate_meta_filtered (buffer, &state, api_type)))
+    ++n;
+
+  return n;
+}
+
+/**
  * gst_buffer_add_meta:
  * @buffer: a #GstBuffer
  * @info: a #GstMetaInfo
@@ -2147,7 +2249,7 @@ gst_buffer_get_meta (GstBuffer * buffer, GType api)
  *
  * Add metadata for @info to @buffer using the parameters in @params.
  *
- * Returns: (transfer none): the metadata for the api in @info on @buffer.
+ * Returns: (transfer none) (nullable): the metadata for the api in @info on @buffer.
  */
 GstMeta *
 gst_buffer_add_meta (GstBuffer * buffer, const GstMetaInfo * info,
@@ -2183,9 +2285,16 @@ gst_buffer_add_meta (GstBuffer * buffer, const GstMetaInfo * info,
     if (!info->init_func (result, params, buffer))
       goto init_failed;
 
-  /* and add to the list of metadata */
-  item->next = GST_BUFFER_META (buffer);
-  GST_BUFFER_META (buffer) = item;
+  item->seq_num = gst_atomic_int64_inc (&meta_seq);
+  item->next = NULL;
+
+  if (!GST_BUFFER_META (buffer)) {
+    GST_BUFFER_META (buffer) = item;
+    GST_BUFFER_TAIL_META (buffer) = item;
+  } else {
+    GST_BUFFER_TAIL_META (buffer)->next = item;
+    GST_BUFFER_TAIL_META (buffer) = item;
+  }
 
   return result;
 
@@ -2225,10 +2334,18 @@ gst_buffer_remove_meta (GstBuffer * buffer, GstMeta * meta)
       const GstMetaInfo *info = meta->info;
 
       /* remove from list */
+      if (GST_BUFFER_TAIL_META (buffer) == walk) {
+        if (prev != walk)
+          GST_BUFFER_TAIL_META (buffer) = prev;
+        else
+          GST_BUFFER_TAIL_META (buffer) = NULL;
+      }
+
       if (GST_BUFFER_META (buffer) == walk)
         GST_BUFFER_META (buffer) = walk->next;
       else
         prev->next = walk->next;
+
       /* call free_func if any */
       if (info->free_func)
         info->free_func (m, buffer);
@@ -2245,7 +2362,7 @@ gst_buffer_remove_meta (GstBuffer * buffer, GstMeta * meta)
 /**
  * gst_buffer_iterate_meta: (skip)
  * @buffer: a #GstBuffer
- * @state: an opaque state pointer
+ * @state: (out caller-allocates): an opaque state pointer
  *
  * Retrieve the next #GstMeta after @current. If @state points
  * to %NULL, the first metadata is returned.
@@ -2280,7 +2397,7 @@ gst_buffer_iterate_meta (GstBuffer * buffer, gpointer * state)
 /**
  * gst_buffer_iterate_meta_filtered: (skip)
  * @buffer: a #GstBuffer
- * @state: an opaque state pointer
+ * @state: (out caller-allocates): an opaque state pointer
  * @meta_api_type: only return #GstMeta of this type
  *
  * Retrieve the next #GstMeta of type @meta_api_type after the current one
@@ -2364,9 +2481,16 @@ gst_buffer_foreach_meta (GstBuffer * buffer, GstBufferForeachMetaFunc func,
       g_return_val_if_fail (!GST_META_FLAG_IS_SET (m, GST_META_FLAG_LOCKED),
           FALSE);
 
+      if (GST_BUFFER_TAIL_META (buffer) == walk) {
+        if (prev != walk)
+          GST_BUFFER_TAIL_META (buffer) = prev;
+        else
+          GST_BUFFER_TAIL_META (buffer) = NULL;
+      }
+
       /* remove from list */
       if (GST_BUFFER_META (buffer) == walk)
-        GST_BUFFER_META (buffer) = next;
+        prev = GST_BUFFER_META (buffer) = next;
       else
         prev->next = next;
 
@@ -2376,6 +2500,8 @@ gst_buffer_foreach_meta (GstBuffer * buffer, GstBufferForeachMetaFunc func,
 
       /* and free the slice */
       g_slice_free1 (ITEM_SIZE (info), walk);
+    } else {
+      prev = walk;
     }
     if (!res)
       break;
@@ -2389,7 +2515,7 @@ gst_buffer_foreach_meta (GstBuffer * buffer, GstBufferForeachMetaFunc func,
  * @offset: the offset to extract
  * @size: the size to extract
  * @dest: (array length=dest_size) (element-type guint8) (out): A pointer where
- *  the destination array will be written.
+ *  the destination array will be written. Might be %NULL if the size is 0.
  * @dest_size: (out): A location where the size of @dest can be written
  *
  * Extracts a copy of at most @size bytes the data at @offset into
@@ -2402,13 +2528,18 @@ void
 gst_buffer_extract_dup (GstBuffer * buffer, gsize offset, gsize size,
     gpointer * dest, gsize * dest_size)
 {
-  gsize real_size;
+  gsize real_size, alloc_size;
 
   real_size = gst_buffer_get_size (buffer);
 
-  *dest = g_malloc (MIN (real_size - offset, size));
-
-  *dest_size = gst_buffer_extract (buffer, offset, *dest, size);
+  alloc_size = MIN (real_size - offset, size);
+  if (alloc_size == 0) {
+    *dest = NULL;
+    *dest_size = 0;
+  } else {
+    *dest = g_malloc (alloc_size);
+    *dest_size = gst_buffer_extract (buffer, offset, *dest, size);
+  }
 }
 
 GST_DEBUG_CATEGORY_STATIC (gst_parent_buffer_meta_debug);
@@ -2421,7 +2552,7 @@ GST_DEBUG_CATEGORY_STATIC (gst_parent_buffer_meta_debug);
  * Add a #GstParentBufferMeta to @buffer that holds a reference on
  * @ref until the buffer is freed.
  *
- * Returns: (transfer none): The #GstParentBufferMeta that was added to the buffer
+ * Returns: (transfer none) (nullable): The #GstParentBufferMeta that was added to the buffer
  *
  * Since: 1.6
  */
@@ -2538,3 +2669,172 @@ gst_parent_buffer_meta_get_info (void)
 
   return meta_info;
 }
+
+GST_DEBUG_CATEGORY_STATIC (gst_reference_timestamp_meta_debug);
+
+/**
+ * gst_buffer_add_reference_timestamp_meta:
+ * @buffer: (transfer none): a #GstBuffer
+ * @reference: (transfer none): identifier for the timestamp reference.
+ * @timestamp: timestamp
+ * @duration: duration, or %GST_CLOCK_TIME_NONE
+ *
+ * Add a #GstReferenceTimestampMeta to @buffer that holds a @timestamp and
+ * optionally @duration based on a specific timestamp @reference. See the
+ * documentation of #GstReferenceTimestampMeta for details.
+ *
+ * Returns: (transfer none) (nullable): The #GstReferenceTimestampMeta that was added to the buffer
+ *
+ * Since: 1.14
+ */
+GstReferenceTimestampMeta *
+gst_buffer_add_reference_timestamp_meta (GstBuffer * buffer,
+    GstCaps * reference, GstClockTime timestamp, GstClockTime duration)
+{
+  GstReferenceTimestampMeta *meta;
+
+  g_return_val_if_fail (GST_IS_CAPS (reference), NULL);
+  g_return_val_if_fail (timestamp != GST_CLOCK_TIME_NONE, NULL);
+
+  meta =
+      (GstReferenceTimestampMeta *) gst_buffer_add_meta (buffer,
+      GST_REFERENCE_TIMESTAMP_META_INFO, NULL);
+
+  if (!meta)
+    return NULL;
+
+  meta->reference = gst_caps_ref (reference);
+  meta->timestamp = timestamp;
+  meta->duration = duration;
+
+  return meta;
+}
+
+/**
+ * gst_buffer_get_reference_timestamp_meta:
+ * @buffer: a #GstBuffer
+ * @reference: (allow-none): a reference #GstCaps
+ *
+ * Find the first #GstReferenceTimestampMeta on @buffer that conforms to
+ * @reference. Conformance is tested by checking if the meta's reference is a
+ * subset of @reference.
+ *
+ * Buffers can contain multiple #GstReferenceTimestampMeta metadata items.
+ *
+ * Returns: (transfer none) (nullable): the #GstReferenceTimestampMeta or %NULL when there
+ * is no such metadata on @buffer.
+ *
+ * Since: 1.14
+ */
+GstReferenceTimestampMeta *
+gst_buffer_get_reference_timestamp_meta (GstBuffer * buffer,
+    GstCaps * reference)
+{
+  gpointer state = NULL;
+  GstMeta *meta;
+  const GstMetaInfo *info = GST_REFERENCE_TIMESTAMP_META_INFO;
+
+  while ((meta = gst_buffer_iterate_meta (buffer, &state))) {
+    if (meta->info->api == info->api) {
+      GstReferenceTimestampMeta *rmeta = (GstReferenceTimestampMeta *) meta;
+
+      if (!reference)
+        return rmeta;
+      if (gst_caps_is_subset (rmeta->reference, reference))
+        return rmeta;
+    }
+  }
+  return NULL;
+}
+
+static gboolean
+_gst_reference_timestamp_meta_transform (GstBuffer * dest, GstMeta * meta,
+    GstBuffer * buffer, GQuark type, gpointer data)
+{
+  GstReferenceTimestampMeta *dmeta, *smeta;
+
+  /* we copy over the reference timestamp meta, independent of transformation
+   * that happens. If it applied to the original buffer, it still applies to
+   * the new buffer as it refers to the time when the media was captured */
+  smeta = (GstReferenceTimestampMeta *) meta;
+  dmeta =
+      gst_buffer_add_reference_timestamp_meta (dest, smeta->reference,
+      smeta->timestamp, smeta->duration);
+  if (!dmeta)
+    return FALSE;
+
+  GST_CAT_DEBUG (gst_reference_timestamp_meta_debug,
+      "copy reference timestamp metadata from buffer %p to %p", buffer, dest);
+
+  return TRUE;
+}
+
+static void
+_gst_reference_timestamp_meta_free (GstReferenceTimestampMeta * meta,
+    GstBuffer * buffer)
+{
+  if (meta->reference)
+    gst_caps_unref (meta->reference);
+}
+
+static gboolean
+_gst_reference_timestamp_meta_init (GstReferenceTimestampMeta * meta,
+    gpointer params, GstBuffer * buffer)
+{
+  static volatile gsize _init;
+
+  if (g_once_init_enter (&_init)) {
+    GST_DEBUG_CATEGORY_INIT (gst_reference_timestamp_meta_debug,
+        "referencetimestampmeta", 0, "referencetimestampmeta");
+    g_once_init_leave (&_init, 1);
+  }
+
+  meta->reference = NULL;
+  meta->timestamp = GST_CLOCK_TIME_NONE;
+  meta->duration = GST_CLOCK_TIME_NONE;
+
+  return TRUE;
+}
+
+GType
+gst_reference_timestamp_meta_api_get_type (void)
+{
+  static volatile GType type = 0;
+  static const gchar *tags[] = { NULL };
+
+  if (g_once_init_enter (&type)) {
+    GType _type =
+        gst_meta_api_type_register ("GstReferenceTimestampMetaAPI", tags);
+    g_once_init_leave (&type, _type);
+  }
+
+  return type;
+}
+
+/**
+ * gst_reference_timestamp_meta_get_info:
+ *
+ * Get the global #GstMetaInfo describing  the #GstReferenceTimestampMeta meta.
+ *
+ * Returns: (transfer none): The #GstMetaInfo
+ *
+ * Since: 1.14
+ */
+const GstMetaInfo *
+gst_reference_timestamp_meta_get_info (void)
+{
+  static const GstMetaInfo *meta_info = NULL;
+
+  if (g_once_init_enter ((GstMetaInfo **) & meta_info)) {
+    const GstMetaInfo *meta =
+        gst_meta_register (gst_reference_timestamp_meta_api_get_type (),
+        "GstReferenceTimestampMeta",
+        sizeof (GstReferenceTimestampMeta),
+        (GstMetaInitFunction) _gst_reference_timestamp_meta_init,
+        (GstMetaFreeFunction) _gst_reference_timestamp_meta_free,
+        _gst_reference_timestamp_meta_transform);
+    g_once_init_leave ((GstMetaInfo **) & meta_info, (GstMetaInfo *) meta);
+  }
+
+  return meta_info;
+}