1 /* GStreamer

     2  * Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>

     3  *                    2000 Wim Taymans <wtay@chello.be>

     4  *

     5  * gstadder.h: Header for GstAdder element

     6  *

     7  * This library is free software; you can redistribute it and/or

     8  * modify it under the terms of the GNU Library General Public

     9  * License as published by the Free Software Foundation; either

    10  * version 2 of the License, or (at your option) any later version.

    11  *

    12  * This library is distributed in the hope that it will be useful,

    13  * but WITHOUT ANY WARRANTY; without even the implied warranty of

    14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

    15  * Library General Public License for more details.

    16  *

    17  * You should have received a copy of the GNU Library General Public

    18  * License along with this library; if not, write to the

    19  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,

    20  * Boston, MA 02111-1307, USA.

    21  */

    22 

    23 #ifndef __GST_ADDER_H__

    24 #define __GST_ADDER_H__

    25 

    26 #include <gst/gst.h>

    27 #include <gst/base/gstcollectpads.h>

    28 

    29 G_BEGIN_DECLS

    30 

    31 #define GST_TYPE_ADDER            (gst_adder_get_type())

    32 #define GST_ADDER(obj)            (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_ADDER,GstAdder))

    33 #define GST_IS_ADDER(obj)         (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_ADDER))

    34 #define GST_ADDER_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST((klass) ,GST_TYPE_ADDER,GstAdderClass))

    35 #define GST_IS_ADDER_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass) ,GST_TYPE_ADDER))

    36 #define GST_ADDER_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS((obj) ,GST_TYPE_ADDER,GstAdderClass))

    37 

    38 typedef struct _GstAdder             GstAdder;

    39 typedef struct _GstAdderClass        GstAdderClass;

    40 typedef struct _GstAdderInputChannel GstAdderInputChannel;

    41 

    42 typedef enum {

    43   GST_ADDER_FORMAT_UNSET,

    44   GST_ADDER_FORMAT_INT,

    45   GST_ADDER_FORMAT_FLOAT

    46 } GstAdderFormat;

    47 

    48 typedef void (*GstAdderFunction) (gpointer out, gpointer in, guint size);

    49 

    50 /**

    51  * GstAdder:

    52  *

    53  * The adder object structure.

    54  */

    55 struct _GstAdder {

    56   GstElement      element;

    57 

    58   GstPad         *srcpad;

    59   GstCollectPads *collect;

    60   /* pad counter, used for creating unique request pads */

    61   gint            padcount;

    62 

    63   /* the next are valid for both int and float */

    64   GstAdderFormat  format;

    65   gint            rate;

    66   gint            channels;

    67   gint            width;

    68   gint            endianness;

    69 

    70   /* the next are valid only for format == GST_ADDER_FORMAT_INT */

    71   gint            depth;

    72   gboolean        is_signed;

    73 

    74   /* number of bytes per sample, actually width/8 * channels */

    75   gint            bps;

    76 

    77   /* function to add samples */

    78   GstAdderFunction func;

    79 

    80   /* counters to keep track of timestamps */

    81   gint64          timestamp;

    82   gint64          offset;

    83 

    84   /* sink event handling */

    85   GstPadEventFunction  collect_event;

    86   GstSegment      segment;

    87   gboolean        segment_pending;

    88   guint64         segment_position;

    89   gdouble         segment_rate;

    90 };

    91 

    92 struct _GstAdderClass {

    93   GstElementClass parent_class;

    94 };

    95 #ifdef __SYMBIAN32__

    96 IMPORT_C

    97 #endif

    98 

    99 

   100 GType    gst_adder_get_type (void);

   101 

   102 G_END_DECLS

   103 

   104 

   105 #endif /* __GST_ADDER_H__ */