#include <gst/gstminiobject.h>
#include <gst/gstclock.h>
#include <gst/gstallocator.h>
+#include <gst/gstcaps.h>
G_BEGIN_DECLS
-GST_EXPORT GType _gst_buffer_type;
+GST_API GType _gst_buffer_type;
typedef struct _GstBuffer GstBuffer;
typedef struct _GstBufferPool GstBufferPool;
+#include <gst/gstmeta.h>
+
#define GST_TYPE_BUFFER (_gst_buffer_type)
#define GST_IS_BUFFER(obj) (GST_IS_MINI_OBJECT_TYPE(obj, GST_TYPE_BUFFER))
#define GST_BUFFER_CAST(obj) ((GstBuffer *)(obj))
*/
#define GST_BUFFER_DTS(buf) (GST_BUFFER_CAST(buf)->dts)
/**
+ * GST_BUFFER_DTS_OR_PTS:
+ * @buf: a #GstBuffer.:
+ *
+ * Returns the buffer decoding timestamp (dts) if valid, else the buffer
+ * presentation time (pts)
+ *
+ * Since: 1.8
+ */
+#define GST_BUFFER_DTS_OR_PTS(buf) (GST_BUFFER_DTS_IS_VALID(buf) ? GST_BUFFER_DTS(buf) : GST_BUFFER_PTS (buf))
+/**
* GST_BUFFER_DURATION:
* @buf: a #GstBuffer.
*
/**
* GstBufferFlags:
- * @GST_BUFFER_FLAG_LIVE: the buffer is live data and should be discarded in
- * the PAUSED state.
- * @GST_BUFFER_FLAG_DECODE_ONLY: the buffer contains data that should be dropped
- * because it will be clipped against the segment
- * boundaries or because it does not contain data
- * that should be shown to the user.
- * @GST_BUFFER_FLAG_DISCONT: the buffer marks a data discontinuity in the stream.
- * This typically occurs after a seek or a dropped buffer
- * from a live or network source.
- * @GST_BUFFER_FLAG_RESYNC: the buffer timestamps might have a discontinuity
- * and this buffer is a good point to resynchronize.
- * @GST_BUFFER_FLAG_CORRUPTED: the buffer data is corrupted.
- * @GST_BUFFER_FLAG_MARKER: the buffer contains a media specific marker. for
- * video this is typically the end of a frame boundary, for audio
- * this is usually the start of a talkspurt.
- * @GST_BUFFER_FLAG_HEADER: the buffer contains header information that is
- * needed to decode the following data.
- * @GST_BUFFER_FLAG_GAP: the buffer has been created to fill a gap in the
- * stream and contains media neutral data (elements can
- * switch to optimized code path that ignores the buffer
- * content).
- * @GST_BUFFER_FLAG_DROPPABLE: the buffer can be dropped without breaking the
- * stream, for example to reduce bandwidth.
- * @GST_BUFFER_FLAG_DELTA_UNIT: this unit cannot be decoded independently.
- * @GST_BUFFER_FLAG_TAG_MEMORY: this flag is cleared when the memory of the buffer
- * is added/removed
- * @GST_BUFFER_FLAG_LAST: additional media specific flags can be added starting from
- * this flag.
+ * @GST_BUFFER_FLAG_LIVE: the buffer is live data and should be discarded in
+ * the PAUSED state.
+ * @GST_BUFFER_FLAG_DECODE_ONLY: the buffer contains data that should be dropped
+ * because it will be clipped against the segment
+ * boundaries or because it does not contain data
+ * that should be shown to the user.
+ * @GST_BUFFER_FLAG_DISCONT: the buffer marks a data discontinuity in the stream.
+ * This typically occurs after a seek or a dropped buffer
+ * from a live or network source.
+ * @GST_BUFFER_FLAG_RESYNC: the buffer timestamps might have a discontinuity
+ * and this buffer is a good point to resynchronize.
+ * @GST_BUFFER_FLAG_CORRUPTED: the buffer data is corrupted.
+ * @GST_BUFFER_FLAG_MARKER: the buffer contains a media specific marker. for
+ * video this is typically the end of a frame boundary, for audio
+ * this is usually the start of a talkspurt.
+ * @GST_BUFFER_FLAG_HEADER: the buffer contains header information that is
+ * needed to decode the following data.
+ * @GST_BUFFER_FLAG_GAP: the buffer has been created to fill a gap in the
+ * stream and contains media neutral data (elements can
+ * switch to optimized code path that ignores the buffer
+ * content).
+ * @GST_BUFFER_FLAG_DROPPABLE: the buffer can be dropped without breaking the
+ * stream, for example to reduce bandwidth.
+ * @GST_BUFFER_FLAG_DELTA_UNIT: this unit cannot be decoded independently.
+ * @GST_BUFFER_FLAG_TAG_MEMORY: this flag is set when memory of the buffer
+ * is added/removed
+ * @GST_BUFFER_FLAG_SYNC_AFTER: Elements which write to disk or permanent
+ * storage should ensure the data is synced after
+ * writing the contents of this buffer. (Since: 1.6)
+ * @GST_BUFFER_FLAG_NON_DROPPABLE: This buffer is important and should not be dropped.
+ * This can be used to mark important buffers, e.g. to flag
+ * RTP packets carrying keyframes or codec setup data for RTP
+ * Forward Error Correction purposes, or to prevent still video
+ * frames from being dropped by elements due to QoS. (Since: 1.14)
+ * @GST_BUFFER_FLAG_LAST: additional media specific flags can be added starting from
+ * this flag.
*
* A set of buffer flags used to describe properties of a #GstBuffer.
*/
typedef enum {
- GST_BUFFER_FLAG_LIVE = (GST_MINI_OBJECT_FLAG_LAST << 0),
- GST_BUFFER_FLAG_DECODE_ONLY = (GST_MINI_OBJECT_FLAG_LAST << 1),
- GST_BUFFER_FLAG_DISCONT = (GST_MINI_OBJECT_FLAG_LAST << 2),
- GST_BUFFER_FLAG_RESYNC = (GST_MINI_OBJECT_FLAG_LAST << 3),
- GST_BUFFER_FLAG_CORRUPTED = (GST_MINI_OBJECT_FLAG_LAST << 4),
- GST_BUFFER_FLAG_MARKER = (GST_MINI_OBJECT_FLAG_LAST << 5),
- GST_BUFFER_FLAG_HEADER = (GST_MINI_OBJECT_FLAG_LAST << 6),
- GST_BUFFER_FLAG_GAP = (GST_MINI_OBJECT_FLAG_LAST << 7),
- GST_BUFFER_FLAG_DROPPABLE = (GST_MINI_OBJECT_FLAG_LAST << 8),
- GST_BUFFER_FLAG_DELTA_UNIT = (GST_MINI_OBJECT_FLAG_LAST << 9),
- GST_BUFFER_FLAG_TAG_MEMORY = (GST_MINI_OBJECT_FLAG_LAST << 10),
-
- GST_BUFFER_FLAG_LAST = (GST_MINI_OBJECT_FLAG_LAST << 16)
+ GST_BUFFER_FLAG_LIVE = (GST_MINI_OBJECT_FLAG_LAST << 0),
+ GST_BUFFER_FLAG_DECODE_ONLY = (GST_MINI_OBJECT_FLAG_LAST << 1),
+ GST_BUFFER_FLAG_DISCONT = (GST_MINI_OBJECT_FLAG_LAST << 2),
+ GST_BUFFER_FLAG_RESYNC = (GST_MINI_OBJECT_FLAG_LAST << 3),
+ GST_BUFFER_FLAG_CORRUPTED = (GST_MINI_OBJECT_FLAG_LAST << 4),
+ GST_BUFFER_FLAG_MARKER = (GST_MINI_OBJECT_FLAG_LAST << 5),
+ GST_BUFFER_FLAG_HEADER = (GST_MINI_OBJECT_FLAG_LAST << 6),
+ GST_BUFFER_FLAG_GAP = (GST_MINI_OBJECT_FLAG_LAST << 7),
+ GST_BUFFER_FLAG_DROPPABLE = (GST_MINI_OBJECT_FLAG_LAST << 8),
+ GST_BUFFER_FLAG_DELTA_UNIT = (GST_MINI_OBJECT_FLAG_LAST << 9),
+ GST_BUFFER_FLAG_TAG_MEMORY = (GST_MINI_OBJECT_FLAG_LAST << 10),
+ GST_BUFFER_FLAG_SYNC_AFTER = (GST_MINI_OBJECT_FLAG_LAST << 11),
+ GST_BUFFER_FLAG_NON_DROPPABLE = (GST_MINI_OBJECT_FLAG_LAST << 12),
+
+ GST_BUFFER_FLAG_LAST = (GST_MINI_OBJECT_FLAG_LAST << 16)
} GstBufferFlags;
/**
guint64 offset_end;
};
+GST_API
GType gst_buffer_get_type (void);
+GST_API
guint gst_buffer_get_max_memory (void);
/* allocation */
+
+GST_API
GstBuffer * gst_buffer_new (void);
+
+GST_API
GstBuffer * gst_buffer_new_allocate (GstAllocator * allocator, gsize size,
GstAllocationParams * params);
+GST_API
GstBuffer * gst_buffer_new_wrapped_full (GstMemoryFlags flags, gpointer data, gsize maxsize,
gsize offset, gsize size, gpointer user_data,
GDestroyNotify notify);
+GST_API
GstBuffer * gst_buffer_new_wrapped (gpointer data, gsize size);
+GST_API
+GstBuffer * gst_buffer_new_wrapped_bytes (GBytes * bytes);
/* memory blocks */
+
+GST_API
guint gst_buffer_n_memory (GstBuffer *buffer);
+
+GST_API
void gst_buffer_insert_memory (GstBuffer *buffer, gint idx, GstMemory *mem);
+
+GST_API
void gst_buffer_replace_memory_range (GstBuffer *buffer, guint idx, gint length, GstMemory *mem);
+
+GST_API
GstMemory * gst_buffer_peek_memory (GstBuffer *buffer, guint idx);
+
+GST_API
GstMemory * gst_buffer_get_memory_range (GstBuffer *buffer, guint idx, gint length);
+
+GST_API
void gst_buffer_remove_memory_range (GstBuffer *buffer, guint idx, gint length);
+GST_API
void gst_buffer_prepend_memory (GstBuffer *buffer, GstMemory *mem);
+
+GST_API
void gst_buffer_append_memory (GstBuffer *buffer, GstMemory *mem);
+
+GST_API
void gst_buffer_replace_memory (GstBuffer *buffer, guint idx, GstMemory *mem);
+
+GST_API
void gst_buffer_replace_all_memory (GstBuffer *buffer, GstMemory *mem);
+
+GST_API
GstMemory * gst_buffer_get_memory (GstBuffer *buffer, guint idx);
+
+GST_API
GstMemory * gst_buffer_get_all_memory (GstBuffer *buffer);
+
+GST_API
void gst_buffer_remove_memory (GstBuffer *buffer, guint idx);
+
+GST_API
void gst_buffer_remove_all_memory (GstBuffer *buffer);
+GST_API
gboolean gst_buffer_find_memory (GstBuffer *buffer, gsize offset, gsize size,
guint *idx, guint *length, gsize *skip);
-
+GST_API
gboolean gst_buffer_is_memory_range_writable (GstBuffer *buffer, guint idx, gint length);
+
+GST_API
gboolean gst_buffer_is_all_memory_writable (GstBuffer *buffer);
+GST_API
gsize gst_buffer_fill (GstBuffer *buffer, gsize offset,
gconstpointer src, gsize size);
+GST_API
gsize gst_buffer_extract (GstBuffer *buffer, gsize offset,
gpointer dest, gsize size);
+GST_API
gint gst_buffer_memcmp (GstBuffer *buffer, gsize offset,
gconstpointer mem, gsize size);
+GST_API
gsize gst_buffer_memset (GstBuffer *buffer, gsize offset,
guint8 val, gsize size);
-
+GST_API
gsize gst_buffer_get_sizes_range (GstBuffer *buffer, guint idx, gint length,
gsize *offset, gsize *maxsize);
+GST_API
gboolean gst_buffer_resize_range (GstBuffer *buffer, guint idx, gint length,
gssize offset, gssize size);
-
+GST_API
gsize gst_buffer_get_sizes (GstBuffer *buffer, gsize *offset, gsize *maxsize);
+
+GST_API
gsize gst_buffer_get_size (GstBuffer *buffer);
+
+GST_API
void gst_buffer_resize (GstBuffer *buffer, gssize offset, gssize size);
+
+GST_API
void gst_buffer_set_size (GstBuffer *buffer, gssize size);
+GST_API
gboolean gst_buffer_map_range (GstBuffer *buffer, guint idx, gint length,
GstMapInfo *info, GstMapFlags flags);
+GST_API
gboolean gst_buffer_map (GstBuffer *buffer, GstMapInfo *info, GstMapFlags flags);
+GST_API
void gst_buffer_unmap (GstBuffer *buffer, GstMapInfo *info);
+
+GST_API
void gst_buffer_extract_dup (GstBuffer *buffer, gsize offset,
gsize size, gpointer *dest,
gsize *dest_size);
+GST_API
+GstBufferFlags gst_buffer_get_flags (GstBuffer * buffer);
+
+GST_API
+gboolean gst_buffer_has_flags (GstBuffer * buffer, GstBufferFlags flags);
+
+GST_API
+gboolean gst_buffer_set_flags (GstBuffer * buffer, GstBufferFlags flags);
+
+GST_API
+gboolean gst_buffer_unset_flags (GstBuffer * buffer, GstBufferFlags flags);
+
+
/* refcounting */
/**
*
* Returns: (transfer full): @buf
*/
-#ifdef _FOOL_GTK_DOC_
-G_INLINE_FUNC GstBuffer * gst_buffer_ref (GstBuffer * buf);
-#endif
-
static inline GstBuffer *
gst_buffer_ref (GstBuffer * buf)
{
* Decreases the refcount of the buffer. If the refcount reaches 0, the buffer
* with the associated metadata and memory will be freed.
*/
-#ifdef _FOOL_GTK_DOC_
-G_INLINE_FUNC void gst_buffer_unref (GstBuffer * buf);
-#endif
-
static inline void
gst_buffer_unref (GstBuffer * buf)
{
gst_mini_object_unref (GST_MINI_OBJECT_CAST (buf));
}
+/**
+ * gst_clear_buffer: (skip)
+ * @buf_ptr: a pointer to a #GstBuffer reference
+ *
+ * Clears a reference to a #GstBuffer.
+ *
+ * @buf_ptr must not be %NULL.
+ *
+ * If the reference is %NULL then this function does nothing. Otherwise, the
+ * reference count of the buffer is decreased and the pointer is set to %NULL.
+ *
+ * Since: 1.16
+ */
+static inline void
+gst_clear_buffer (GstBuffer ** buf_ptr)
+{
+ gst_clear_mini_object ((GstMiniObject **) buf_ptr);
+}
+
/* copy buffer */
/**
* gst_buffer_copy:
* @buf: a #GstBuffer.
*
- * Create a copy of the given buffer. This will also make a newly allocated
- * copy of the data the source buffer contains.
+ * Create a copy of the given buffer. This will only copy the buffer's
+ * data to a newly allocated memory if needed (if the type of memory
+ * requires it), otherwise the underlying data is just referenced.
+ * Check gst_buffer_copy_deep() if you want to force the data
+ * to be copied to newly allocated memory.
*
* Returns: (transfer full): a new copy of @buf.
*/
-#ifdef _FOOL_GTK_DOC_
-G_INLINE_FUNC GstBuffer * gst_buffer_copy (const GstBuffer * buf);
-#endif
-
static inline GstBuffer *
gst_buffer_copy (const GstBuffer * buf)
{
return GST_BUFFER (gst_mini_object_copy (GST_MINI_OBJECT_CONST_CAST (buf)));
}
+GST_API
+GstBuffer * gst_buffer_copy_deep (const GstBuffer * buf);
/**
* GstBufferCopyFlags:
* @GST_BUFFER_COPY_META: flag indicating that buffer meta should be
* copied
* @GST_BUFFER_COPY_DEEP: flag indicating that memory should always be
- * copied instead of reffed (Since 1.2)
+ * copied instead of reffed (Since: 1.2)
*
* A set of flags that can be provided to the gst_buffer_copy_into()
* function to specify which items should be copied.
} GstBufferCopyFlags;
/**
- * GST_BUFFER_COPY_METADATA:
+ * GST_BUFFER_COPY_METADATA: (value 7) (type GstBufferCopyFlags)
*
* Combination of all possible metadata fields that can be copied with
* gst_buffer_copy_into().
*/
-#define GST_BUFFER_COPY_METADATA (GST_BUFFER_COPY_FLAGS | GST_BUFFER_COPY_TIMESTAMPS |\
- GST_BUFFER_COPY_META)
+#define GST_BUFFER_COPY_METADATA ((GstBufferCopyFlags) (GST_BUFFER_COPY_FLAGS |\
+ GST_BUFFER_COPY_TIMESTAMPS | GST_BUFFER_COPY_META))
/**
- * GST_BUFFER_COPY_ALL:
+ * GST_BUFFER_COPY_ALL: (value 15) (type GstBufferCopyFlags)
*
* Combination of all possible fields that can be copied with
* gst_buffer_copy_into().
#define GST_BUFFER_COPY_ALL ((GstBufferCopyFlags)(GST_BUFFER_COPY_METADATA | GST_BUFFER_COPY_MEMORY))
/* copies memory or metadata into newly allocated buffer */
+
+GST_API
gboolean gst_buffer_copy_into (GstBuffer *dest, GstBuffer *src,
GstBufferCopyFlags flags,
gsize offset, gsize size);
* gst_buffer_make_writable:
* @buf: (transfer full): a #GstBuffer
*
- * Makes a writable buffer from the given buffer. If the source buffer is
- * already writable, this will simply return the same buffer. A copy will
- * otherwise be made using gst_buffer_copy().
+ * Returns a writable copy of @buf. If the source buffer is
+ * already writable, this will simply return the same buffer.
+ *
+ * Use this function to ensure that a buffer can be safely modified before
+ * making changes to it, including changing the metadata such as PTS/DTS.
+ *
+ * If the reference count of the source buffer @buf is exactly one, the caller
+ * is the sole owner and this function will return the buffer object unchanged.
+ *
+ * If there is more than one reference on the object, a copy will be made using
+ * gst_buffer_copy(). The passed-in @buf will be unreffed in that case, and the
+ * caller will now own a reference to the new returned buffer object. Note
+ * that this just copies the buffer structure itself, the underlying memory is
+ * not copied if it can be shared amongst multiple buffers.
+ *
+ * In short, this function unrefs the buf in the argument and refs the buffer
+ * that it returns. Don't access the argument after calling this function unless
+ * you have an additional reference to it.
*
* Returns: (transfer full): a writable buffer which may or may not be the
* same as @buf
/**
* gst_buffer_replace:
- * @obuf: (inout) (transfer full): pointer to a pointer to a #GstBuffer to be
- * replaced.
+ * @obuf: (inout) (transfer full) (nullable): pointer to a pointer to
+ * a #GstBuffer to be replaced.
* @nbuf: (transfer none) (allow-none): pointer to a #GstBuffer that will
* replace the buffer pointed to by @obuf.
*
* in some cases), and the reference counts are updated appropriately (the old
* buffer is unreffed, the new is reffed).
*
- * Either @nbuf or the #GstBuffer pointed to by @obuf may be NULL.
+ * Either @nbuf or the #GstBuffer pointed to by @obuf may be %NULL.
*
- * Returns: TRUE when @obuf was different from @nbuf.
+ * Returns: %TRUE when @obuf was different from @nbuf.
*/
-#ifdef _FOOL_GTK_DOC_
-G_INLINE_FUNC gboolean gst_buffer_replace (GstBuffer **obuf, GstBuffer *nbuf);
-#endif
-
static inline gboolean
gst_buffer_replace (GstBuffer **obuf, GstBuffer *nbuf)
{
}
/* creating a region */
+
+GST_API
GstBuffer* gst_buffer_copy_region (GstBuffer *parent, GstBufferCopyFlags flags,
gsize offset, gsize size);
/* append two buffers */
+
+GST_API
GstBuffer* gst_buffer_append_region (GstBuffer *buf1, GstBuffer *buf2,
gssize offset, gssize size);
+GST_API
GstBuffer* gst_buffer_append (GstBuffer *buf1, GstBuffer *buf2);
/* metadata */
/**
* GstBufferForeachMetaFunc:
* @buffer: a #GstBuffer
- * @meta: a pointer to a #GstMeta
+ * @meta: (out) (nullable): a pointer to a #GstMeta
* @user_data: user data passed to gst_buffer_foreach_meta()
*
* A function that will be called from gst_buffer_foreach_meta(). The @meta
* When this function returns %TRUE, the next meta will be
* returned. When %FALSE is returned, gst_buffer_foreach_meta() will return.
*
- * When @meta is set to NULL, the item will be removed from the buffer.
+ * When @meta is set to %NULL, the item will be removed from the buffer.
*
* Returns: %FALSE when gst_buffer_foreach_meta() should stop
*/
typedef gboolean (*GstBufferForeachMetaFunc) (GstBuffer *buffer, GstMeta **meta,
gpointer user_data);
+GST_API
GstMeta * gst_buffer_get_meta (GstBuffer *buffer, GType api);
+
+GST_API
+guint gst_buffer_get_n_meta (GstBuffer *buffer, GType api_type);
+
+GST_API
GstMeta * gst_buffer_add_meta (GstBuffer *buffer, const GstMetaInfo *info,
gpointer params);
+GST_API
gboolean gst_buffer_remove_meta (GstBuffer *buffer, GstMeta *meta);
+GST_API
GstMeta * gst_buffer_iterate_meta (GstBuffer *buffer, gpointer *state);
+GST_API
+GstMeta * gst_buffer_iterate_meta_filtered (GstBuffer * buffer,
+ gpointer * state,
+ GType meta_api_type);
+GST_API
gboolean gst_buffer_foreach_meta (GstBuffer *buffer,
GstBufferForeachMetaFunc func,
gpointer user_data);
*/
#define gst_value_get_buffer(v) GST_BUFFER_CAST (g_value_get_boxed(v))
+typedef struct _GstParentBufferMeta GstParentBufferMeta;
+
+/**
+ * GstParentBufferMeta:
+ * @parent: the parent #GstMeta structure
+ * @buffer: the #GstBuffer on which a reference is being held.
+ *
+ * The #GstParentBufferMeta is a #GstMeta which can be attached to a #GstBuffer
+ * to hold a reference to another buffer that is only released when the child
+ * #GstBuffer is released.
+ *
+ * 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
+ */
+struct _GstParentBufferMeta
+{
+ GstMeta parent;
+
+ /*< public >*/
+ GstBuffer *buffer;
+};
+
+GST_API
+GType gst_parent_buffer_meta_api_get_type (void);
+#ifndef GST_DISABLE_DEPRECATED
+#define GST_TYPE_PARENT_BUFFER_META_API_TYPE GST_PARENT_BUFFER_META_API_TYPE
+#endif
+#define GST_PARENT_BUFFER_META_API_TYPE (gst_parent_buffer_meta_api_get_type())
+
+/**
+ * gst_buffer_get_parent_buffer_meta:
+ * @b: a #GstBuffer
+ *
+ * Find and return a #GstParentBufferMeta if one exists on the
+ * buffer
+ */
+#define gst_buffer_get_parent_buffer_meta(b) \
+ ((GstParentBufferMeta*)gst_buffer_get_meta((b),GST_PARENT_BUFFER_META_API_TYPE))
+
+GST_API
+const GstMetaInfo *gst_parent_buffer_meta_get_info (void);
+#define GST_PARENT_BUFFER_META_INFO (gst_parent_buffer_meta_get_info())
+
+/* implementation */
+
+GST_API
+GstParentBufferMeta *gst_buffer_add_parent_buffer_meta (GstBuffer *buffer,
+ GstBuffer *ref);
+
+typedef struct _GstReferenceTimestampMeta GstReferenceTimestampMeta;
+
+/**
+ * GstReferenceTimestampMeta:
+ * @parent: the parent #GstMeta structure
+ * @reference: identifier for the timestamp reference.
+ * @timestamp: timestamp
+ * @duration: duration, or %GST_CLOCK_TIME_NONE
+ *
+ * #GstReferenceTimestampMeta can be used to attach alternative timestamps and
+ * possibly durations to a #GstBuffer. These are generally not according to
+ * the pipeline clock and could be e.g. the NTP timestamp when the media was
+ * captured.
+ *
+ * The reference is stored as a #GstCaps in @reference. Examples of valid
+ * references would be "timestamp/x-drivername-stream" for timestamps that are locally
+ * generated by some driver named "drivername" when generating the stream,
+ * e.g. based on a frame counter, or "timestamp/x-ntp, host=pool.ntp.org,
+ * port=123" for timestamps based on a specific NTP server.
+ *
+ * Since: 1.14
+ */
+struct _GstReferenceTimestampMeta
+{
+ GstMeta parent;
+
+ /*< public >*/
+ GstCaps *reference;
+ GstClockTime timestamp, duration;
+};
+
+GST_API
+GType gst_reference_timestamp_meta_api_get_type (void);
+#define GST_REFERENCE_TIMESTAMP_META_API_TYPE (gst_reference_timestamp_meta_api_get_type())
+
+GST_API
+const GstMetaInfo *gst_reference_timestamp_meta_get_info (void);
+#define GST_REFERENCE_TIMESTAMP_META_INFO (gst_reference_timestamp_meta_get_info())
+
+/* implementation */
+
+GST_API
+GstReferenceTimestampMeta * gst_buffer_add_reference_timestamp_meta (GstBuffer * buffer,
+ GstCaps * reference,
+ GstClockTime timestamp,
+ GstClockTime duration);
+
+GST_API
+GstReferenceTimestampMeta * gst_buffer_get_reference_timestamp_meta (GstBuffer * buffer,
+ GstCaps * reference);
+
+#ifdef G_DEFINE_AUTOPTR_CLEANUP_FUNC
+G_DEFINE_AUTOPTR_CLEANUP_FUNC(GstBuffer, gst_buffer_unref)
+#endif
+
+#ifdef G_DEFINE_AUTOPTR_CLEANUP_FUNC
+G_DEFINE_AUTOPTR_CLEANUP_FUNC(GstBufferPool, gst_object_unref)
+#endif
+
G_END_DECLS
#endif /* __GST_BUFFER_H__ */
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