gstvaapisubpicture.h 3.33 KB
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/*
 *  gstvaapisubpicture.h - VA subpicture abstraction
 *
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 *  Copyright (C) 2010-2011 Splitted-Desktop Systems
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 *    Author: Gwenole Beauchesne <gwenole.beauchesne@splitted-desktop.com>
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 *  Copyright (C) 2011-2013 Intel Corporation
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 *    Author: Gwenole Beauchesne <gwenole.beauchesne@intel.com>
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 *
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 *  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.
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 *
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 *  This library is distributed in the hope that it will be useful,
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 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
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 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *  Lesser General Public License for more details.
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 *
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 *  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
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 */

#ifndef GST_VAAPI_SUBPICTURE_H
#define GST_VAAPI_SUBPICTURE_H

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#include <gst/vaapi/gstvaapiobject.h>
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#include <gst/vaapi/gstvaapidisplay.h>
#include <gst/vaapi/gstvaapiimage.h>
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#include <gst/video/video-overlay-composition.h>
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G_BEGIN_DECLS

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#define GST_VAAPI_SUBPICTURE(obj) \
    ((GstVaapiSubpicture *)(obj))
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typedef struct _GstVaapiSubpicture              GstVaapiSubpicture;

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/**
 * GstVaapiSubpictureFlags:
 * @GST_VAAPI_SUBPICTURE_FLAG_PREMULTIPLIED_ALPHA:
 *   subpicture has RGB pixels with pre-multiplied alpha
 * @GST_VAAPI_SUBPICTURE_FLAG_GLOBAL_ALPHA:
 *   subpicture needs to be blended with some global-alpha value at
 *   rendering time
 *
 * The set of all subpicture rendering flags for #GstVaapiSubpicture.
 */
typedef enum {
    GST_VAAPI_SUBPICTURE_FLAG_PREMULTIPLIED_ALPHA    = (1 << 0),
    GST_VAAPI_SUBPICTURE_FLAG_GLOBAL_ALPHA           = (1 << 1),
} GstVaapiSubpictureFlags;

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#define GST_TYPE_VAAPI_SUBPICTURE (gst_vaapi_subpicture_get_type ())

#define GST_VAAPI_SUBPICTURE_ID(subpicture)      (gst_vaapi_subpicture_get_id (subpicture))

GType
gst_vaapi_subpicture_get_type (void) G_GNUC_CONST;

/**
 * gst_vaapi_subpicture_unref: (skip)
 * @subpicture: (transfer full): a #GstVaapiSubpicture.
 *
 * Decreases the refcount of the subpicture. If the refcount reaches 0, the
 * subpicture will be freed.
 */
static inline void
gst_vaapi_subpicture_unref (GstVaapiSubpicture *subpicture)
{
  gst_mini_object_unref (GST_MINI_OBJECT_CAST (subpicture));
}

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GstVaapiSubpicture *
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gst_vaapi_subpicture_new(GstVaapiImage *image, guint flags);
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GstVaapiSubpicture *
gst_vaapi_subpicture_new_from_overlay_rectangle(
    GstVaapiDisplay          *display,
    GstVideoOverlayRectangle *rect
);

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GstVaapiID
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gst_vaapi_subpicture_get_id(GstVaapiSubpicture *subpicture);

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guint
gst_vaapi_subpicture_get_flags(GstVaapiSubpicture *subpicture);

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GstVaapiImage *
gst_vaapi_subpicture_get_image(GstVaapiSubpicture *subpicture);

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gboolean
gst_vaapi_subpicture_set_image(GstVaapiSubpicture *subpicture,
    GstVaapiImage *image);
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gfloat
gst_vaapi_subpicture_get_global_alpha(GstVaapiSubpicture *subpicture);

gboolean
gst_vaapi_subpicture_set_global_alpha(GstVaapiSubpicture *subpicture,
    gfloat global_alpha);

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G_DEFINE_AUTOPTR_CLEANUP_FUNC(GstVaapiSubpicture, gst_vaapi_subpicture_unref)

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G_END_DECLS

#endif /* GST_VAAPI_SUBPICTURE_H */