gstvaapiparamspecs.c 4.03 KB
Newer Older
gb's avatar
gb committed
1 2 3
/*
 *  gstvaapiparamspecs.c - GParamSpecs for some of our types
 *
4
 *  Copyright (C) 2010-2011 Splitted-Desktop Systems
gb's avatar
gb committed
5
 *
6 7 8 9
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Lesser General Public License
 *  as published by the Free Software Foundation; either version 2.1
 *  of the License, or (at your option) any later version.
gb's avatar
gb committed
10
 *
11
 *  This library is distributed in the hope that it will be useful,
gb's avatar
gb committed
12
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
13 14
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *  Lesser General Public License for more details.
gb's avatar
gb committed
15
 *
16 17 18 19
 *  You should have received a copy of the GNU Lesser General Public
 *  License along with this library; if not, write to the Free
 *  Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 *  Boston, MA 02110-1301 USA
gb's avatar
gb committed
20 21
 */

gb's avatar
gb committed
22 23 24 25 26
/**
 * SECTION:gstvaapiparamspecs
 * @short_description: GParamSpecs for some of our types
 */

gb's avatar
gb committed
27 28
#include "config.h"
#include "gstvaapiparamspecs.h"
29
#include "gstvaapivalue.h"
gb's avatar
gb committed
30 31 32 33 34 35

/* --- GstVaapiParamSpecID --- */

static void
gst_vaapi_param_id_init(GParamSpec *pspec)
{
36
    GST_VAAPI_PARAM_SPEC_ID(pspec)->default_value = GST_VAAPI_ID_NONE;
gb's avatar
gb committed
37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140
}

static void
gst_vaapi_param_id_set_default(GParamSpec *pspec, GValue *value)
{
    gst_vaapi_value_set_id(value, GST_VAAPI_PARAM_SPEC_ID(pspec)->default_value);
}

static gboolean
gst_vaapi_param_id_validate(GParamSpec *pspec, GValue *value)
{
    /* Return FALSE if everything is OK, otherwise TRUE */
    return FALSE;
}

static gint
gst_vaapi_param_id_compare(
    GParamSpec   *pspec,
    const GValue *value1,
    const GValue *value2
)
{
    const GstVaapiID v1 = gst_vaapi_value_get_id(value1);
    const GstVaapiID v2 = gst_vaapi_value_get_id(value2);

    return (v1 < v2 ? -1 : (v1 > v2 ? 1 : 0));
}

GType
gst_vaapi_param_spec_id_get_type(void)
{
    static GType type;

    if (G_UNLIKELY(type == 0)) {
        static GParamSpecTypeInfo pspec_info = {
            sizeof(GstVaapiParamSpecID),        /* instance_size     */
            0,                                  /* n_preallocs       */
            gst_vaapi_param_id_init,            /* instance_init     */
            G_TYPE_INVALID,                     /* value_type        */
            NULL,                               /* finalize          */
            gst_vaapi_param_id_set_default,     /* value_set_default */
            gst_vaapi_param_id_validate,        /* value_validate    */
            gst_vaapi_param_id_compare,         /* values_cmp        */
        };
        pspec_info.value_type = GST_VAAPI_TYPE_ID;
        type = g_param_type_register_static("GstVaapiParamSpecID", &pspec_info);
    }
    return type;
}

/**
 * gst_vaapi_param_spec_id:
 * @name: canonical name of the property specified
 * @nick: nick name for the property specified
 * @blurb: description of the property specified
 * @default_value: default value
 * @flags: flags for the property specified
 *
 * This function creates an ID GParamSpec for use by #GstVaapiObject
 * objects. This function is typically used in connection with
 * g_object_class_install_property() in a GObjects's instance_init
 * function.
 *
 * Return value: a newly created parameter specification
 */
GParamSpec *
gst_vaapi_param_spec_id(
    const gchar *name,
    const gchar *nick,
    const gchar *blurb,
    GstVaapiID   default_value,
    GParamFlags  flags
)
{
    GstVaapiParamSpecID *ispec;
    GParamSpec *pspec;
    GValue value = { 0, };

    ispec = g_param_spec_internal(
        GST_VAAPI_TYPE_PARAM_ID,
        name,
        nick,
        blurb,
        flags
    );
    if (!ispec)
        return NULL;

    ispec->default_value = default_value;
    pspec = G_PARAM_SPEC(ispec);

    /* Validate default value */
    g_value_init(&value, GST_VAAPI_TYPE_ID);
    gst_vaapi_value_set_id(&value, default_value);
    if (gst_vaapi_param_id_validate(pspec, &value)) {
        g_param_spec_ref(pspec);
        g_param_spec_sink(pspec);
        g_param_spec_unref(pspec);
        pspec = NULL;
    }
    g_value_unset(&value);

    return pspec;
}