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/* Generic video mixer plugin
* Copyright (C) 2008 Wim Taymans <wim@fluendo.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef __GST_VIDEO_MIXER_H__
#define __GST_VIDEO_MIXER_H__
#include <gst/gst.h>
#include <gst/video/video.h>
#include "videomixerpad.h"
GST_DEBUG_CATEGORY_EXTERN (gst_videomixer_debug);
#define GST_CAT_DEFAULT gst_videomixer_debug
G_BEGIN_DECLS
#define GST_TYPE_VIDEO_MIXER (gst_videomixer_get_type())
#define GST_VIDEO_MIXER(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_VIDEO_MIXER, GstVideoMixer))
#define GST_VIDEO_MIXER_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_VIDEO_MIXER, GstVideoMixerClass))
#define GST_IS_VIDEO_MIXER(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_VIDEO_MIXER))
#define GST_IS_VIDEO_MIXER_CLASS(klass) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_VIDEO_MIXER))
typedef struct _GstVideoMixer GstVideoMixer;
typedef struct _GstVideoMixerClass GstVideoMixerClass;
/**
* GstVideoMixerBackground:
* @VIDEO_MIXER_BACKGROUND_CHECKER: checker pattern background
* @VIDEO_MIXER_BACKGROUND_BLACK: solid color black background
* @VIDEO_MIXER_BACKGROUND_WHITE: solid color white background
*
* The different backgrounds videomixer can blend over.
*/
typedef enum
{
VIDEO_MIXER_BACKGROUND_CHECKER,
VIDEO_MIXER_BACKGROUND_BLACK,
VIDEO_MIXER_BACKGROUND_WHITE
}
GstVideoMixerBackground;
/**
* GstVideoMixer:
*
* The opaque #GstVideoMixer structure.
*/
struct _GstVideoMixer
{
GstElement element;
/* pad */
GstPad *srcpad;
/* Lock to prevent the state to change while blending */
GMutex *state_lock;
/* Sink pads using Collect Pads from core's base library */
GstCollectPads *collect;
/* sinkpads, a GSList of GstVideoMixerPads */
GSList *sinkpads;
gint numpads;
GstClockTime last_ts;
/* the master pad */
GstVideoMixerPad *master;
GstVideoFormat fmt;
gint in_width, in_height;
gint out_width, out_height;
gboolean setcaps;
gboolean sendseg;
GstVideoMixerBackground background;
gint fps_n;
gint fps_d;
/* Next available sinkpad index */
gint next_sinkpad;
/* sink event handling */
GstPadEventFunction collect_event;
guint64 segment_position;
gdouble segment_rate;
void (*blend) (guint8 * src, gint xpos, gint ypos, gint src_width, gint src_height, gdouble src_alpha,
guint8 * dest, gint dest_width, gint dest_height);
void (*fill_checker) (guint8 * dest, gint width, gint height);
void (*fill_color) (guint8 * dest, gint width, gint height, gint colY, gint colU, gint colV);
};
struct _GstVideoMixerClass
{
GstElementClass parent_class;
};
G_END_DECLS
#endif /* __GST_VIDEO_MIXER_H__ */
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