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diff --git a/gst/matroska/matroska-mux.h b/gst/matroska/matroska-mux.h
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+++ b/gst/matroska/matroska-mux.h
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+/* GStreamer Matroska muxer/demuxer
+ * (c) 2003 Ronald Bultje <rbultje@ronald.bitfreak.net>
+ *
+ * matroska-mux.h: matroska file/stream muxer object types
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#ifndef __GST_MATROSKA_MUX_H__
+#define __GST_MATROSKA_MUX_H__
+
+#include <gst/gst.h>
+
+#include "ebml-write.h"
+#include "matroska-ids.h"
+
+G_BEGIN_DECLS
+
+#define GST_TYPE_MATROSKA_MUX \
+  (gst_matroska_mux_get_type ())
+#define GST_MATROSKA_MUX(obj) \
+  (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_MATROSKA_MUX, GstMatroskaMux))
+#define GST_MATROSKA_MUX_CLASS(klass) \
+  (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_MATROSKA_MUX, GstMatroskaMux))
+#define GST_IS_MATROSKA_MUX(obj) \
+  (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_MATROSKA_MUX))
+#define GST_IS_MATROSKA_MUX_CLASS(obj) \
+  (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_MATROSKA_MUX))
+
+#define GST_MATROSKA_MUX_MAX_STREAMS 64
+
+typedef enum {
+  GST_MATROSKA_MUX_STATE_START,
+  GST_MATROSKA_MUX_STATE_HEADER,
+  GST_MATROSKA_MUX_STATE_DATA,
+} GstMatroskaMuxState;
+
+typedef struct _GstMatroskaMux {
+  GstEbmlWrite   parent;
+
+  /* pads */
+  GstPad 	*srcpad;
+  struct {
+    GstMatroskaTrackContext *track;
+    GstBuffer   *buffer;
+    gboolean     eos;
+  } sink[GST_MATROSKA_MUX_MAX_STREAMS];
+  guint          num_streams,
+                 num_v_streams, num_a_streams, num_t_streams;
+
+  /* metadata - includes writing_app and creation_time */
+  GstCaps       *metadata;
+
+  /* state */
+  GstMatroskaMuxState state;
+
+  /* a cue (index) table */
+  GstMatroskaIndex *index;
+  guint          num_indexes;
+
+  /* timescale in the file */
+  guint64        time_scale;
+
+  /* length, position (time, ns) */
+  guint64        duration;
+
+  /* byte-positions of master-elements (for replacing contents) */
+  guint64        segment_pos,
+		 seekhead_pos,
+		 cues_pos,
+#if 0
+		 tags_pos,
+#endif
+		 info_pos,
+		 tracks_pos,
+		 duration_pos;
+  guint64        segment_master;
+} GstMatroskaMux;
+
+typedef struct _GstMatroskaMuxClass {
+  GstEbmlWriteClass parent;
+} GstMatroskaMuxClass;
+
+GType    gst_matroska_mux_get_type    (void);
+
+gboolean gst_matroska_mux_plugin_init (GstPlugin *plugin);
+
+G_END_DECLS
+
+#endif /* __GST_MATROSKA_MUX_H__ */