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

/*
 *  gstvaapiwindow_drm.c - VA/DRM window abstraction
 *
 *  Copyright (C) 2012 Intel Corporation
 *
 *  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:gstvaapiwindow_drm
 * @short_description: VA/DRM dummy window abstraction
 */

#include "sysdeps.h"
#include "gstvaapiwindow_drm.h"

#define DEBUG 1
#include "gstvaapidebug.h"

G_DEFINE_TYPE(GstVaapiWindowDRM,
              gst_vaapi_window_drm,
              GST_VAAPI_TYPE_WINDOW);

static gboolean
gst_vaapi_window_drm_show(GstVaapiWindow *window)
{
    return TRUE;
}

static gboolean
gst_vaapi_window_drm_hide(GstVaapiWindow *window)
{
    return TRUE;
}

static gboolean
gst_vaapi_window_drm_create(
    GstVaapiWindow *window,
    guint          *width,
    guint          *height
)
{
    return TRUE;
}

static void
gst_vaapi_window_drm_destroy(GstVaapiWindow * window)
{
}

static gboolean
gst_vaapi_window_drm_resize(
    GstVaapiWindow * window,
    guint            width,
    guint            height
)
{
    return TRUE;
}

static gboolean
gst_vaapi_window_drm_render(
    GstVaapiWindow          *window,
    GstVaapiSurface         *surface,
    const GstVaapiRectangle *src_rect,
    const GstVaapiRectangle *dst_rect,
    guint                    flags
)
{
    return TRUE;
}

static void
gst_vaapi_window_drm_finalize(GObject *object)
{
    G_OBJECT_CLASS(gst_vaapi_window_drm_parent_class)->finalize(object);
}

static void
gst_vaapi_window_drm_constructed(GObject *object)
{
    GObjectClass *parent_class;

    parent_class = G_OBJECT_CLASS(gst_vaapi_window_drm_parent_class);
    if (parent_class->constructed)
        parent_class->constructed(object);
}

static void
gst_vaapi_window_drm_class_init(GstVaapiWindowDRMClass * klass)
{
    GObjectClass * const object_class = G_OBJECT_CLASS(klass);
    GstVaapiWindowClass * const window_class = GST_VAAPI_WINDOW_CLASS(klass);

    object_class->finalize      = gst_vaapi_window_drm_finalize;
    object_class->constructed   = gst_vaapi_window_drm_constructed;

    window_class->create        = gst_vaapi_window_drm_create;
    window_class->destroy       = gst_vaapi_window_drm_destroy;
    window_class->show          = gst_vaapi_window_drm_show;
    window_class->hide          = gst_vaapi_window_drm_hide;
    window_class->render        = gst_vaapi_window_drm_render;
    window_class->resize        = gst_vaapi_window_drm_resize;
}

static void
gst_vaapi_window_drm_init(GstVaapiWindowDRM * window)
{
}

/**
 * gst_vaapi_window_drm_new:
 * @display: a #GstVaapiDisplay
 * @width: the requested window width, in pixels (unused)
 * @height: the requested windo height, in pixels (unused)
 *
 * Creates a dummy window. The window will be attached to the @display.
 * All rendering functions will return success since VA/DRM is a
 * renderless API.
 *
 * Note: this dummy window object is only necessary to fulfill cases
 * where the client application wants to automatically determine the
 * best display to use for the current system. As such, it provides
 * utility functions with the same API (function arguments) to help
 * implement uniform function tables.
 *
 * Return value: the newly allocated #GstVaapiWindow object
 */
GstVaapiWindow *
gst_vaapi_window_drm_new(
    GstVaapiDisplay *display,
    guint            width,
    guint            height
)
{
    GST_DEBUG("new window, size %ux%u", width, height);

    g_return_val_if_fail(GST_VAAPI_IS_DISPLAY(display), NULL);
    g_return_val_if_fail(width  > 0, NULL);
    g_return_val_if_fail(height > 0, NULL);

    return g_object_new(GST_VAAPI_TYPE_WINDOW_DRM,
                        "display", display,
                        "id",      GST_VAAPI_ID(0),
                        "width",   width,
                        "height",  height,
                        NULL);
}