/* GStreamer EBML I/O
 * (c) 2003 Ronald Bultje <rbultje@ronald.bitfreak.net>
 *
 * ebml-read.c: read EBML data from file/stream
 *
 * 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_EBML_READ_H__
#define __GST_EBML_READ_H__

#include <gst/gst.h>

G_BEGIN_DECLS

#define GST_TYPE_EBML_READ \
  (gst_ebml_read_get_type ())
#define GST_EBML_READ(obj) \
  (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_EBML_READ, GstEbmlRead))
#define GST_EBML_READ_CLASS(klass) \
  (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_EBML_READ, GstEbmlReadClass))
#define GST_IS_EBML_READ(obj) \
  (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_EBML_READ))
#define GST_IS_EBML_READ_CLASS(klass) \
  (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_EBML_READ))
#define GST_EBML_READ_GET_CLASS(obj) \
  (G_TYPE_INSTANCE_GET_CLASS ((obj), GST_TYPE_EBML_READ, GstEbmlReadClass))

/* custom flow return code */
#define  GST_FLOW_END  GST_FLOW_CUSTOM_SUCCESS

typedef struct _GstEbmlLevel {
  guint64 start;
  guint64 length;
} GstEbmlLevel;

typedef struct _GstEbmlRead {
  GstElement parent;

  GstBuffer *cached_buffer;
  gboolean push_cache;

  GstPad *sinkpad;
  guint64 offset;

  GList *level;
} GstEbmlRead;

typedef struct _GstEbmlReadClass {
  GstElementClass parent;
} GstEbmlReadClass;

GType    gst_ebml_read_get_type          (void);

void          gst_ebml_level_free        (GstEbmlLevel *level);

void          gst_ebml_read_reset_cache (GstEbmlRead * ebml,
                                          GstBuffer * buffer,
                                          guint64 offset);

GstFlowReturn gst_ebml_peek_id           (GstEbmlRead *ebml,
                                          guint       *level_up,
                                          guint32     *id);

GstFlowReturn gst_ebml_read_seek         (GstEbmlRead *ebml,
                                          guint64      offset);

gint64        gst_ebml_read_get_length   (GstEbmlRead *ebml);

GstFlowReturn gst_ebml_read_skip         (GstEbmlRead *ebml);

GstFlowReturn gst_ebml_read_buffer       (GstEbmlRead *ebml,
                                          guint32     *id,
                                          GstBuffer  **buf);

GstFlowReturn gst_ebml_read_uint         (GstEbmlRead *ebml,
                                          guint32     *id,
                                          guint64     *num);

GstFlowReturn gst_ebml_read_sint         (GstEbmlRead *ebml,
                                          guint32     *id,
                                          gint64      *num);

GstFlowReturn gst_ebml_read_float        (GstEbmlRead *ebml,
                                          guint32     *id,
                                          gdouble     *num);

GstFlowReturn gst_ebml_read_ascii        (GstEbmlRead *ebml,
                                          guint32     *id,
                                          gchar      **str);

GstFlowReturn gst_ebml_read_utf8         (GstEbmlRead *ebml,
                                          guint32     *id,
                                          gchar      **str);

GstFlowReturn gst_ebml_read_date         (GstEbmlRead *ebml,
                                          guint32     *id,
                                          gint64      *date);

GstFlowReturn gst_ebml_read_master       (GstEbmlRead *ebml,
                                          guint32     *id);

GstFlowReturn gst_ebml_read_binary       (GstEbmlRead *ebml,
                                          guint32     *id,
                                          guint8     **binary,
                                          guint64     *length);

GstFlowReturn gst_ebml_read_header       (GstEbmlRead *read,
                                          gchar      **doctype,
                                          guint       *version);

G_END_DECLS

#endif /* __GST_EBML_READ_H__ */