gstreamer/gst-libs/gst/vaapi/gstvaapivalue.c

/*
 *  gstvaapivalue.c - GValue implementations specific to VA-API
 *
 *  Copyright (C) 2010-2011 Splitted-Desktop Systems
 *    Author: Gwenole Beauchesne <gwenole.beauchesne@splitted-desktop.com>
 *  Copyright (C) 2012-2013 Intel Corporation
 *    Author: Gwenole Beauchesne <gwenole.beauchesne@intel.com>
 *
 *  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.
 *
 *  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
 *  Lesser General Public License for more details.
 *
 *  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
 */

/**
 * SECTION:gstvaapivalue
 * @short_description: GValue implementations specific to VA-API
 */

#include "sysdeps.h"
#include <gobject/gvaluecollector.h>
#include "gstvaapivalue.h"

static gpointer
default_copy_func(gpointer data)
{
    return data;
}

static void
default_free_func(gpointer data)
{
}

/* --- GstVaapiPoint --- */

GType
gst_vaapi_point_get_type(void)
{
    static volatile gsize g_type = 0;

    if (g_once_init_enter(&g_type)) {
        GType type = g_boxed_type_register_static(
            g_intern_static_string("GstVaapiPoint"),
            default_copy_func, default_free_func);
        g_once_init_leave(&g_type, type);
    }
    return g_type;
}

/* --- GstVaapiRectangle --- */

GType
gst_vaapi_rectangle_get_type(void)
{
    static volatile gsize g_type = 0;

    if (g_once_init_enter(&g_type)) {
        GType type = g_boxed_type_register_static(
            g_intern_static_string("GstVaapiRectangle"),
            default_copy_func, default_free_func);
        g_once_init_leave(&g_type, type);
    }
    return g_type;
}

/* --- GstVaapiRenderMode --- */

GType
gst_vaapi_render_mode_get_type(void)
{
    static GType render_mode_type = 0;

    static const GEnumValue render_modes[] = {
        { GST_VAAPI_RENDER_MODE_OVERLAY,
          "Overlay render mode", "overlay" },
        { GST_VAAPI_RENDER_MODE_TEXTURE,
          "Textured-blit render mode", "texture" },
        { 0, NULL, NULL }
    };

    if (!render_mode_type) {
        render_mode_type =
            g_enum_register_static("GstVaapiRenderMode", render_modes);
    }
    return render_mode_type;
}

/* --- GstVaapiRotation --- */

GType
gst_vaapi_rotation_get_type(void)
{
    static GType g_type = 0;

    static const GEnumValue rotation_values[] = {
        { GST_VAAPI_ROTATION_0,
          "Unrotated mode", "0" },
        { GST_VAAPI_ROTATION_90,
          "Rotated by 90°, clockwise", "90" },
        { GST_VAAPI_ROTATION_180,
          "Rotated by 180°, clockwise", "180" },
        { GST_VAAPI_ROTATION_270,
          "Rotated by 270°, clockwise", "270" },
        { 0, NULL, NULL },
    };

    if (!g_type)
        g_type = g_enum_register_static("GstVaapiRotation", rotation_values);
    return g_type;
}

/* --- GstVaapiRateControl --- */

GType
gst_vaapi_rate_control_get_type(void)
{
    static volatile gsize g_type = 0;

    static const GEnumValue rate_control_values[] = {
        { GST_VAAPI_RATECONTROL_NONE,
          "None", "none" },
        { GST_VAAPI_RATECONTROL_CQP,
          "Constant QP", "cqp" },
        { GST_VAAPI_RATECONTROL_CBR,
          "Constant bitrate", "cbr" },
        { GST_VAAPI_RATECONTROL_VCM,
          "Video conference", "vcm" },
        { GST_VAAPI_RATECONTROL_VBR,
          "Variable bitrate", "vbr" },
        { GST_VAAPI_RATECONTROL_VBR_CONSTRAINED,
          "Variable bitrate - Constrained", "vbr_constrained" },
        { 0, NULL, NULL },
    };

    if (g_once_init_enter(&g_type)) {
        GType type = g_enum_register_static("GstVaapiRateControl",
            rate_control_values);
        g_once_init_leave(&g_type, type);
    }
    return g_type;
}

static gboolean
build_enum_subset_values_from_mask (GstVaapiEnumSubset *subset, guint32 mask)
{
    GEnumClass *enum_class;
    const GEnumValue *value;
    guint i, n;

    enum_class = g_type_class_ref(subset->parent_type);
    if (!enum_class)
        return FALSE;

    for (i = 0, n = 0; i < 32 && n < subset->num_values; i++) {
        if (!(mask & (1U << i)))
            continue;
        value = g_enum_get_value(enum_class, i);
        if (!value)
            continue;
        subset->values[n++] = *value;
    }
    g_type_class_unref(enum_class);
    if (n != subset->num_values - 1)
        goto error_invalid_num_values;
    return TRUE;

    /* ERRORS */
error_invalid_num_values:
    {
        g_error("invalid number of static values for `%s'", subset->type_name);
        return FALSE;
    }
}

GType
gst_vaapi_type_define_enum_subset_from_mask(GstVaapiEnumSubset *subset,
    guint32 mask)
{
    if (g_once_init_enter(&subset->type)) {
        GType type;

        build_enum_subset_values_from_mask(subset, mask);
        memset(&subset->type_info, 0, sizeof(subset->type_info));
        g_enum_complete_type_info(subset->parent_type, &subset->type_info,
            subset->values);

        type = g_type_register_static (G_TYPE_ENUM, subset->type_name,
            &subset->type_info, 0);
        g_once_init_leave(&subset->type, type);
    }
    return subset->type;
}