1 /* GStreamer
2  *
3  * Copyright (C) 2003 Ronald Bultje <rbultje@ronald.bitfreak.net>
4  *               2006 Edgard Lima <edgard.lima@gmail.com>
5  *
6  * gstv4l2colorbalance.h: color balance interface implementation for V4L2
7  *
8  * This library is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU Library General Public
10  * License as published by the Free Software Foundation; either
11  * version 2 of the License, or (at your option) any later version.
12  *
13  * This library is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
16  * Library General Public License for more details.
17  *
18  * You should have received a copy of the GNU Library General Public
19  * License along with this library; if not, write to the
20  * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
21  * Boston, MA 02110-1301, USA.
22  */
23 
24 #ifndef __GST_V4L2_COLOR_BALANCE_H__
25 #define __GST_V4L2_COLOR_BALANCE_H__
26 
27 #include <gst/gst.h>
28 #include <gst/video/colorbalance.h>
29 
30 #include "gstv4l2object.h"
31 
32 G_BEGIN_DECLS
33 
34 #define GST_TYPE_V4L2_COLOR_BALANCE_CHANNEL \
35   (gst_v4l2_color_balance_channel_get_type ())
36 #define GST_V4L2_COLOR_BALANCE_CHANNEL(obj) \
37   (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_V4L2_COLOR_BALANCE_CHANNEL, \
38                                GstV4l2ColorBalanceChannel))
39 #define GST_V4L2_COLOR_BALANCE_CHANNEL_CLASS(klass) \
40   (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_V4L2_COLOR_BALANCE_CHANNEL, \
41                             GstV4l2ColorBalanceChannelClass))
42 #define GST_IS_V4L2_COLOR_BALANCE_CHANNEL(obj) \
43   (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_V4L2_COLOR_BALANCE_CHANNEL))
44 #define GST_IS_V4L2_COLOR_BALANCE_CHANNEL_CLASS(klass) \
45   (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_V4L2_COLOR_BALANCE_CHANNEL))
46 
47 typedef struct _GstV4l2ColorBalanceChannel {
48   GstColorBalanceChannel parent;
49 
50   guint32 id;
51 } GstV4l2ColorBalanceChannel;
52 
53 typedef struct _GstV4l2ColorBalanceChannelClass {
54   GstColorBalanceChannelClass parent;
55 } GstV4l2ColorBalanceChannelClass;
56 
57 GType gst_v4l2_color_balance_channel_get_type   (void);
58 
59 const GList *   gst_v4l2_color_balance_list_channels    (GstV4l2Object * v4l2object);
60 
61 void            gst_v4l2_color_balance_set_value        (GstV4l2Object * v4l2object,
62                                                          GstColorBalanceChannel * channel,
63                                                          gint value);
64 
65 gint            gst_v4l2_color_balance_get_value        (GstV4l2Object * v4l2object,
66                                                          GstColorBalanceChannel * channel);
67 
68 #define GST_IMPLEMENT_V4L2_COLOR_BALANCE_METHODS(Type, interface_as_function)         \
69                                                                                       \
70 static const GList *                                                                  \
71 interface_as_function ## _color_balance_list_channels (GstColorBalance * balance)     \
72 {                                                                                     \
73   Type *this = (Type*) balance;                                                       \
74   return gst_v4l2_color_balance_list_channels(this->v4l2object);                      \
75 }                                                                                     \
76                                                                                       \
77 static void                                                                           \
78 interface_as_function ## _color_balance_set_value (GstColorBalance * balance,         \
79                                                    GstColorBalanceChannel * channel,  \
80                                                    gint value)                        \
81 {                                                                                     \
82   Type *this = (Type*) balance;                                                       \
83   gst_v4l2_color_balance_set_value(this->v4l2object, channel, value);          \
84 }                                                                                     \
85                                                                                       \
86 static gint                                                                           \
87 interface_as_function ## _color_balance_get_value (GstColorBalance * balance,         \
88                                                    GstColorBalanceChannel * channel)  \
89 {                                                                                     \
90   Type *this = (Type*) balance;                                                       \
91   return gst_v4l2_color_balance_get_value(this->v4l2object, channel);                 \
92 }                                                                                     \
93                                                                                       \
94 static GstColorBalanceType                                                            \
95 interface_as_function ## _color_balance_get_balance_type (GstColorBalance * balance)  \
96 {                                                                                     \
97   return GST_COLOR_BALANCE_HARDWARE;                                                  \
98 }                                                                                     \
99                                                                                       \
100 static void                                                                           \
101 interface_as_function ## _color_balance_interface_init (GstColorBalanceInterface * iface) \
102 {                                                                                     \
103   /* default virtual functions */                                                     \
104   iface->list_channels = interface_as_function ## _color_balance_list_channels;       \
105   iface->set_value = interface_as_function ## _color_balance_set_value;               \
106   iface->get_value = interface_as_function ## _color_balance_get_value;               \
107   iface->get_balance_type = interface_as_function ## _color_balance_get_balance_type; \
108 }                                                                                     \
109 
110 G_END_DECLS
111 #endif /* __GST_V4L2_COLOR_BALANCE_H__ */
112