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/* Generic video aggregator plugin
* Copyright (C) 2008 Wim Taymans <wim@fluendo.com>
* Copyright (C) 2010 Sebastian Dröge <sebastian.droege@collabora.co.uk>
*
* 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., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifndef __GST_VIDEO_AGGREGATOR_H__
#define __GST_VIDEO_AGGREGATOR_H__
#ifndef GST_USE_UNSTABLE_API
#warning "The Video library from gst-plugins-bad is unstable API and may change in future."
#warning "You can define GST_USE_UNSTABLE_API to avoid this warning."
#endif
#include <gst/gst.h>
#include <gst/video/video.h>
#include <gst/base/gstaggregator.h>
#include <gst/video/video-bad-prelude.h>
G_BEGIN_DECLS
typedef struct _GstVideoAggregator GstVideoAggregator;
typedef struct _GstVideoAggregatorClass GstVideoAggregatorClass;
typedef struct _GstVideoAggregatorPrivate GstVideoAggregatorPrivate;
#define GST_TYPE_VIDEO_AGGREGATOR_PAD (gst_video_aggregator_pad_get_type())
#define GST_VIDEO_AGGREGATOR_PAD(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_VIDEO_AGGREGATOR_PAD, GstVideoAggregatorPad))
#define GST_VIDEO_AGGREGATOR_PAD_CAST(obj) ((GstVideoAggregatorPad *)(obj))
#define GST_VIDEO_AGGREGATOR_PAD_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_COMPOSITOR_PAD, GstVideoAggregatorPadClass))
#define GST_IS_VIDEO_AGGREGATOR_PAD(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_VIDEO_AGGREGATOR_PAD))
#define GST_IS_VIDEO_AGGREGATOR_PAD_CLASS(klass) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_VIDEO_AGGREGATOR_PAD))
#define GST_VIDEO_AGGREGATOR_PAD_GET_CLASS(obj) \
(G_TYPE_INSTANCE_GET_CLASS((obj),GST_TYPE_VIDEO_AGGREGATOR_PAD,GstVideoAggregatorPadClass))
typedef struct _GstVideoAggregatorPad GstVideoAggregatorPad;
typedef struct _GstVideoAggregatorPadClass GstVideoAggregatorPadClass;
typedef struct _GstVideoAggregatorPadPrivate GstVideoAggregatorPadPrivate;
/**
* GstVideoAggregatorPad:
* @info: The #GstVideoInfo currently set on the pad
* @buffer_vinfo: The #GstVideoInfo representing the type contained
* in @buffer
* @aggregated_frame: The #GstVideoFrame ready to be used for aggregation
* inside the aggregate_frames vmethod.
* @zorder: The zorder of this pad
*/
struct _GstVideoAggregatorPad
{
GstAggregatorPad parent;
GstVideoInfo info;
GstBuffer *buffer;
GstVideoFrame *aggregated_frame;
/* properties */
guint zorder;
gboolean ignore_eos;
/* Subclasses can force an alpha channel in the (input thus output)
* colorspace format */
gboolean needs_alpha;
/* < private > */
GstVideoAggregatorPadPrivate *priv;
gpointer _gst_reserved[GST_PADDING];
};
/**
* GstVideoAggregatorPadClass:
*
* @set_info: Lets subclass set a converter on the pad,
* right after a new format has been negotiated.
* @prepare_frame: Prepare the frame from the pad buffer (if any)
* and sets it to @aggregated_frame
* @clean_frame: clean the frame previously prepared in prepare_frame
*/
struct _GstVideoAggregatorPadClass
{
GstAggregatorPadClass parent_class;
gboolean (*set_info) (GstVideoAggregatorPad * pad,
GstVideoAggregator * videoaggregator,
GstVideoInfo * current_info,
GstVideoInfo * wanted_info);
gboolean (*prepare_frame) (GstVideoAggregatorPad * pad,
GstVideoAggregator * videoaggregator);
void (*clean_frame) (GstVideoAggregatorPad * pad,
GstVideoAggregator * videoaggregator);
gpointer _gst_reserved[GST_PADDING_LARGE];
};
GST_VIDEO_BAD_API
GType gst_video_aggregator_pad_get_type (void);
#define GST_TYPE_VIDEO_AGGREGATOR (gst_video_aggregator_get_type())
#define GST_VIDEO_AGGREGATOR(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_VIDEO_AGGREGATOR, GstVideoAggregator))
#define GST_VIDEO_AGGREGATOR_CAST(obj) ((GstVideoAggregator *)(obj))
#define GST_VIDEO_AGGREGATOR_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_VIDEO_AGGREGATOR, GstVideoAggregatorClass))
#define GST_IS_VIDEO_AGGREGATOR(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_VIDEO_AGGREGATOR))
#define GST_IS_VIDEO_AGGREGATOR_CLASS(klass) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_VIDEO_AGGREGATOR))
#define GST_VIDEO_AGGREGATOR_GET_CLASS(obj) \
(G_TYPE_INSTANCE_GET_CLASS((obj),GST_TYPE_VIDEO_AGGREGATOR,GstVideoAggregatorClass))
/**
* GstVideoAggregator:
* @info: The #GstVideoInfo representing the currently set
* srcpad caps.
*/
struct _GstVideoAggregator
{
GstAggregator aggregator;
/*< public >*/
/* Output caps */
GstVideoInfo info;
/* < private > */
GstVideoAggregatorPrivate *priv;
gpointer _gst_reserved[GST_PADDING_LARGE];
};
/**
* GstVideoAggregatorClass:
* @update_caps: Optional.
* Lets subclasses update the #GstCaps representing
* the src pad caps before usage. Return %NULL to indicate failure.
* @aggregate_frames: Lets subclasses aggregate frames that are ready. Subclasses
* should iterate the GstElement.sinkpads and use the already
* mapped #GstVideoFrame from GstVideoAggregatorPad.aggregated_frame
* or directly use the #GstBuffer from GstVideoAggregatorPad.buffer
* if it needs to map the buffer in a special way. The result of the
* aggregation should land in @outbuffer.
* @get_output_buffer: Optional.
* Lets subclasses provide a #GstBuffer to be used as @outbuffer of
* the #aggregate_frames vmethod.
* @negotiated_caps: Optional.
* Notifies subclasses what caps format has been negotiated
* @find_best_format: Optional.
* Lets subclasses decide of the best common format to use.
**/
struct _GstVideoAggregatorClass
{
/*< private >*/
GstAggregatorClass parent_class;
/*< public >*/
GstCaps * (*update_caps) (GstVideoAggregator * videoaggregator,
GstCaps * caps);
GstFlowReturn (*aggregate_frames) (GstVideoAggregator * videoaggregator,
GstBuffer * outbuffer);
GstFlowReturn (*get_output_buffer) (GstVideoAggregator * videoaggregator,
GstBuffer ** outbuffer);
void (*find_best_format) (GstVideoAggregator * vagg,
GstCaps * downstream_caps,
GstVideoInfo * best_info,
gboolean * at_least_one_alpha);
GstCaps *sink_non_alpha_caps;
/* < private > */
gpointer _gst_reserved[GST_PADDING_LARGE];
};
GST_VIDEO_BAD_API
GType gst_video_aggregator_get_type (void);
G_END_DECLS
#endif /* __GST_VIDEO_AGGREGATOR_H__ */
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