gstreamer/ext/wavpack/gstwavpackparse.h

/* GStreamer wavpack plugin
 * (c) 2005 Arwed v. Merkatz <v.merkatz@gmx.net>
 *
 * gstwavpackparse.h: wavpack file parser
 *
 * 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_WAVPACK_PARSE_H__
#define __GST_WAVPACK_PARSE_H__

#include <gst/gst.h>

G_BEGIN_DECLS

/* #define's don't like whitespacey bits */
#define GST_TYPE_WAVPACK_PARSE \
  (gst_wavpack_parse_get_type())
#define GST_WAVPACK_PARSE(obj) \
  (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_WAVPACK_PARSE,GstWavpackParse))
#define GST_WAVPACK_PARSE_CLASS(klass) \
  (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_WAVPACK_PARSE,GstWavpackParse))
#define GST_IS_WAVPACK_PARSE(obj) \
  (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_WAVPACK_PARSE))
#define GST_IS_WAVPACK_PARSE_CLASS(obj) \
  (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_WAVPACK_PARSE))

typedef struct _GstWavpackParse           GstWavpackParse;
typedef struct _GstWavpackParseClass      GstWavpackParseClass;
typedef struct _GstWavpackParseIndexEntry GstWavpackParseIndexEntry;

struct _GstWavpackParseIndexEntry {
  gint64 byte_offset;          /* byte offset of this chunk  */
  gint64 sample_offset;        /* first sample in this chunk */
  gint64 sample_offset_end;    /* first sample in next chunk  */
};

struct _GstWavpackParse
{
  GstElement     element;

  GstPad        *sinkpad;
  GstPad        *srcpad;
  
  guint          samplerate;
  guint          channels;
  guint          total_samples;

  gboolean       need_newsegment;

  gint64         current_offset;   /* byte offset on sink pad */
  gint64         upstream_length;  /* length of file in bytes */

  GstSegment     segment;     /* the currently configured segment, in
                               * samples/audio frames (DEFAULT format) */

  /* Array of GstWavpackParseIndexEntry structs, mapping known
   * sample offsets to byte offsets. Is kept increasing without
   * gaps (ie. append only and consecutive entries must always
   * map to consecutive chunks in the file). */
  GArray        *entries;
};

struct _GstWavpackParseClass 
{
  GstElementClass parent;
};

GType gst_wavpack_parse_get_type (void);

gboolean gst_wavpack_parse_plugin_init (GstPlugin *plugin);

G_END_DECLS

#endif /* __GST_WAVPACK_PARSE_H__ */