2 * empathy-gst-video-src.c - Source for EmpathyGstVideoSrc
3 * Copyright (C) 2008 Collabora Ltd.
4 * @author Sjoerd Simons <sjoerd.simons@collabora.co.uk>
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
25 #include <gst/interfaces/colorbalance.h>
27 #include "empathy-video-src.h"
29 G_DEFINE_TYPE(EmpathyGstVideoSrc
, empathy_video_src
, GST_TYPE_BIN
)
31 /* Keep in sync with EmpathyGstVideoSrcChannel */
32 static gchar
*channel_names
[NR_EMPATHY_GST_VIDEO_SRC_CHANNELS
] = { "contrast",
33 "brightness", "gamma" };
42 static guint signals
[LAST_SIGNAL
] = {0};
45 /* private structure */
46 typedef struct _EmpathyGstVideoSrcPrivate EmpathyGstVideoSrcPrivate
;
48 struct _EmpathyGstVideoSrcPrivate
50 gboolean dispose_has_run
;
52 /* Element implementing a ColorBalance interface */
56 #define EMPATHY_GST_VIDEO_SRC_GET_PRIVATE(o) \
57 (G_TYPE_INSTANCE_GET_PRIVATE ((o), EMPATHY_TYPE_GST_VIDEO_SRC, \
58 EmpathyGstVideoSrcPrivate))
61 empathy_video_src_init (EmpathyGstVideoSrc
*obj
)
63 EmpathyGstVideoSrcPrivate
*priv
= EMPATHY_GST_VIDEO_SRC_GET_PRIVATE (obj
);
64 GstElement
*scale
, *colorspace
, *capsfilter
;
68 /* allocate any data required by the object here */
69 scale
= gst_element_factory_make ("videoscale", NULL
);
70 colorspace
= gst_element_factory_make ("ffmpegcolorspace", NULL
);
72 capsfilter
= gst_element_factory_make ("capsfilter", NULL
);
73 caps
= gst_caps_new_simple ("video/x-raw-yuv",
74 "width", G_TYPE_INT
, 320,
75 "height", G_TYPE_INT
, 240,
78 g_object_set (G_OBJECT (capsfilter
), "caps", caps
, NULL
);
80 priv
->src
= gst_element_factory_make ("gconfvideosrc", NULL
);
82 gst_bin_add_many (GST_BIN (obj
), priv
->src
, scale
, colorspace
, capsfilter
,
84 gst_element_link_many (priv
->src
, scale
, colorspace
, capsfilter
, NULL
);
86 src
= gst_element_get_static_pad (capsfilter
, "src");
88 ghost
= gst_ghost_pad_new ("src", src
);
89 gst_element_add_pad (GST_ELEMENT (obj
), ghost
);
91 gst_object_unref (G_OBJECT (src
));
94 static void empathy_video_src_dispose (GObject
*object
);
95 static void empathy_video_src_finalize (GObject
*object
);
98 empathy_video_src_class_init (EmpathyGstVideoSrcClass
*empathy_video_src_class
)
100 GObjectClass
*object_class
= G_OBJECT_CLASS (empathy_video_src_class
);
102 g_type_class_add_private (empathy_video_src_class
,
103 sizeof (EmpathyGstVideoSrcPrivate
));
105 object_class
->dispose
= empathy_video_src_dispose
;
106 object_class
->finalize
= empathy_video_src_finalize
;
110 empathy_video_src_dispose (GObject
*object
)
112 EmpathyGstVideoSrc
*self
= EMPATHY_GST_VIDEO_SRC (object
);
113 EmpathyGstVideoSrcPrivate
*priv
= EMPATHY_GST_VIDEO_SRC_GET_PRIVATE (self
);
115 if (priv
->dispose_has_run
)
118 priv
->dispose_has_run
= TRUE
;
120 /* release any references held by the object here */
122 if (G_OBJECT_CLASS (empathy_video_src_parent_class
)->dispose
)
123 G_OBJECT_CLASS (empathy_video_src_parent_class
)->dispose (object
);
127 empathy_video_src_finalize (GObject
*object
)
129 //EmpathyGstVideoSrc *self = EMPATHY_GST_VIDEO_SRC (object);
130 //EmpathyGstVideoSrcPrivate *priv = EMPATHY_GST_VIDEO_SRC_GET_PRIVATE (self);
132 /* free any data held directly by the object here */
134 G_OBJECT_CLASS (empathy_video_src_parent_class
)->finalize (object
);
138 empathy_video_src_new (void)
140 static gboolean registered
= FALSE
;
143 if (!gst_element_register (NULL
, "empathyvideosrc",
144 GST_RANK_NONE
, EMPATHY_TYPE_GST_VIDEO_SRC
))
148 return gst_element_factory_make ("empathyvideosrc", NULL
);
152 empathy_video_src_set_channel (GstElement
*src
,
153 EmpathyGstVideoSrcChannel channel
, guint percent
)
156 GstColorBalance
*balance
;
157 const GList
*channels
;
160 /* Find something supporting GstColorBalance */
161 color
= gst_bin_get_by_interface (GST_BIN (src
), GST_TYPE_COLOR_BALANCE
);
166 balance
= GST_COLOR_BALANCE (color
);
168 channels
= gst_color_balance_list_channels (balance
);
170 for (l
= (GList
*) channels
; l
!= NULL
; l
= g_list_next (l
))
172 GstColorBalanceChannel
*c
= GST_COLOR_BALANCE_CHANNEL (l
->data
);
174 if (g_ascii_strcasecmp (c
->label
, channel_names
[channel
]) == 0)
176 gst_color_balance_set_value (balance
, c
,
177 ((c
->max_value
- c
->min_value
) * percent
)/100
183 g_object_unref (color
);
187 empathy_video_src_get_channel (GstElement
*src
,
188 EmpathyGstVideoSrcChannel channel
)
191 GstColorBalance
*balance
;
192 const GList
*channels
;
196 /* Find something supporting GstColorBalance */
197 color
= gst_bin_get_by_interface (GST_BIN (src
), GST_TYPE_COLOR_BALANCE
);
202 balance
= GST_COLOR_BALANCE (color
);
204 channels
= gst_color_balance_list_channels (balance
);
206 for (l
= (GList
*) channels
; l
!= NULL
; l
= g_list_next (l
))
208 GstColorBalanceChannel
*c
= GST_COLOR_BALANCE_CHANNEL (l
->data
);
210 if (g_ascii_strcasecmp (c
->label
, channel_names
[channel
]) == 0)
213 ((gst_color_balance_get_value (balance
, c
)
214 - c
->min_value
) * 100) /
215 (c
->max_value
- c
->min_value
);
221 g_object_unref (color
);
228 empathy_video_src_get_supported_channels (GstElement
*src
)
231 GstColorBalance
*balance
;
232 const GList
*channels
;
236 /* Find something supporting GstColorBalance */
237 color
= gst_bin_get_by_interface (GST_BIN (src
), GST_TYPE_COLOR_BALANCE
);
242 balance
= GST_COLOR_BALANCE (color
);
244 channels
= gst_color_balance_list_channels (balance
);
246 for (l
= (GList
*) channels
; l
!= NULL
; l
= g_list_next (l
))
248 GstColorBalanceChannel
*channel
= GST_COLOR_BALANCE_CHANNEL (l
->data
);
251 for (i
= 0; i
< NR_EMPATHY_GST_VIDEO_SRC_CHANNELS
; i
++)
253 if (g_ascii_strcasecmp (channel
->label
, channel_names
[i
]) == 0)
261 g_object_unref (color
);