mirrors/gstreamer
mirrors/gstreamer
1
1
Fork 0
mirror of https://gitlab.freedesktop.org/gstreamer/gstreamer.git synced 2024-11-27 04:01:08 +00:00
Code Issues 1 Projects Releases Wiki Activity
gstreamer/subprojects/gst-plugins-base/gst-libs/gst/video/gstvideoaggregator.h

332 lines
13 KiB
C
Raw Blame History

/* 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__
#include <gst/video/video.h>
#include <gst/base/gstaggregator.h>
G_BEGIN_DECLS
typedef struct _GstVideoAggregator GstVideoAggregator;
typedef struct _GstVideoAggregatorClass GstVideoAggregatorClass;
typedef struct _GstVideoAggregatorPrivate GstVideoAggregatorPrivate;
/*************************
* GstVideoAggregatorPad *
*************************/
#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_VIDEO_AGGREGATOR_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
*
* Since: 1.16
*/
struct _GstVideoAggregatorPad
{
GstAggregatorPad parent;
/*< public >*/
/* read-only, with OBJECT_LOCK */
GstVideoInfo info;
/* < private > */
GstVideoAggregatorPadPrivate *priv;
gpointer _gst_reserved[GST_PADDING];
};
/**
* GstVideoAggregatorPadClass:
* @update_conversion_info: Called when either the input or output formats
* have changed.
* @prepare_frame: Prepare the frame from the pad buffer and sets it to prepared_frame.
* Implementations should always return TRUE. Returning FALSE will cease
* iteration over subsequent pads.
* @clean_frame: clean the frame previously prepared in prepare_frame
*
* Since: 1.16
*/
/**
* GstVideoAggregatorPadClass::prepare_frame_start:
* @pad: the #GstVideoAggregatorPad
* @videoaggregator: the parent #GstVideoAggregator
* @buffer: the input #GstBuffer to prepare
* @prepared_frame: the #GstVideoFrame to prepare into
*
* Begin preparing the frame from the pad buffer and sets it to prepared_frame.
*
* If overriden, `prepare_frame_finish` must also be overriden.
*
* Since: 1.20
*/
/**
* GstVideoAggregatorPadClass::prepare_frame_finish:
* @pad: the #GstVideoAggregatorPad
* @videoaggregator: the parent #GstVideoAggregator
* @prepared_frame: the #GstVideoFrame to prepare into
*
* Finish preparing @prepared_frame.
*
* If overriden, `prepare_frame_start` must also be overriden.
*
* Since: 1.20
*/
struct _GstVideoAggregatorPadClass
{
GstAggregatorPadClass parent_class;
void (*update_conversion_info) (GstVideoAggregatorPad * pad);
gboolean (*prepare_frame) (GstVideoAggregatorPad * pad,
GstVideoAggregator * videoaggregator,
GstBuffer * buffer,
GstVideoFrame * prepared_frame);
void (*clean_frame) (GstVideoAggregatorPad * pad,
GstVideoAggregator * videoaggregator,
GstVideoFrame * prepared_frame);
void (*prepare_frame_start) (GstVideoAggregatorPad * pad,
GstVideoAggregator * videoaggregator,
GstBuffer * buffer,
GstVideoFrame * prepared_frame);
void (*prepare_frame_finish) (GstVideoAggregatorPad * pad,
GstVideoAggregator * videoaggregator,
GstVideoFrame * prepared_frame);
gpointer _gst_reserved[GST_PADDING_LARGE-2];
};
GST_VIDEO_API
GType gst_video_aggregator_pad_get_type (void);
GST_VIDEO_API
gboolean gst_video_aggregator_pad_has_current_buffer (GstVideoAggregatorPad *pad);
GST_VIDEO_API
GstBuffer * gst_video_aggregator_pad_get_current_buffer (GstVideoAggregatorPad *pad);
GST_VIDEO_API
GstVideoFrame * gst_video_aggregator_pad_get_prepared_frame (GstVideoAggregatorPad *pad);
GST_VIDEO_API
void gst_video_aggregator_pad_set_needs_alpha (GstVideoAggregatorPad *pad, gboolean needs_alpha);
/********************************
* GstVideoAggregatorConvertPad *
*******************************/
#define GST_TYPE_VIDEO_AGGREGATOR_CONVERT_PAD (gst_video_aggregator_convert_pad_get_type())
#define GST_VIDEO_AGGREGATOR_CONVERT_PAD(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_VIDEO_AGGREGATOR_CONVERT_PAD, GstVideoAggregatorConvertPad))
#define GST_VIDEO_AGGREGATOR_CONVERT_PAD_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_VIDEO_AGGREGATOR_CONVERT_PAD, GstVideoAggregatorConvertPadClass))
#define GST_VIDEO_AGGREGATOR_CONVERT_PAD_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj),GST_TYPE_VIDEO_AGGREGATOR_CONVERT_PAD, GstVideoAggregatorConvertPadClass))
#define GST_IS_VIDEO_AGGREGATOR_CONVERT_PAD(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_VIDEO_AGGREGATOR_CONVERT_PAD))
#define GST_IS_VIDEO_AGGREGATOR_CONVERT_PAD_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_VIDEO_AGGREGATOR_CONVERT_PAD))
typedef struct _GstVideoAggregatorConvertPad GstVideoAggregatorConvertPad;
typedef struct _GstVideoAggregatorConvertPadClass GstVideoAggregatorConvertPadClass;
typedef struct _GstVideoAggregatorConvertPadPrivate GstVideoAggregatorConvertPadPrivate;
/**
* GstVideoAggregatorConvertPad:
*
* An implementation of GstPad that can be used with #GstVideoAggregator.
*
* See #GstVideoAggregator for more details.
*
* Since: 1.16
*/
struct _GstVideoAggregatorConvertPad
{
/*< private >*/
GstVideoAggregatorPad parent;
GstVideoAggregatorConvertPadPrivate *priv;
gpointer _gst_reserved[GST_PADDING];
};
/**
* GstVideoAggregatorConvertPadClass:
*
* Since: 1.16
*/
struct _GstVideoAggregatorConvertPadClass
{
GstVideoAggregatorPadClass parent_class;
void (*create_conversion_info) (GstVideoAggregatorConvertPad *pad, GstVideoAggregator *agg, GstVideoInfo *conversion_info);
/*< private >*/
gpointer _gst_reserved[GST_PADDING];
};
GST_VIDEO_API
GType gst_video_aggregator_convert_pad_get_type (void);
GST_VIDEO_API
void gst_video_aggregator_convert_pad_update_conversion_info (GstVideoAggregatorConvertPad * pad);
G_DEFINE_AUTOPTR_CLEANUP_FUNC(GstVideoAggregatorConvertPad, gst_object_unref);
/****************************************
* GstVideoAggregatorParallelConvertPad *
****************************************/
#define GST_TYPE_VIDEO_AGGREGATOR_PARALLEL_CONVERT_PAD (gst_video_aggregator_parallel_convert_pad_get_type())
GST_VIDEO_API
G_DECLARE_DERIVABLE_TYPE (GstVideoAggregatorParallelConvertPad, gst_video_aggregator_parallel_convert_pad, GST, VIDEO_AGGREGATOR_PARALLEL_CONVERT_PAD, GstVideoAggregatorConvertPad);
#define GST_VIDEO_AGGREGATOR_PARALLEL_CONVERT_PAD(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_VIDEO_AGGREGATOR_PARALLEL_CONVERT_PAD, GstVideoAggregatorParallelConvertPad))
#define GST_VIDEO_AGGREGATOR_PARALLEL_CONVERT_PAD_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_VIDEO_AGGREGATOR_PARALLEL_CONVERT_PAD, GstVideoAggregatorConvertPadClass))
#define GST_VIDEO_AGGREGATOR_PARALLEL_CONVERT_PAD_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj),GST_TYPE_VIDEO_AGGREGATOR_PARALLEL_CONVERT_PAD, GstVideoAggregatorConvertPadClass))
#define GST_IS_VIDEO_AGGREGATOR_PARALLEL_CONVERT_PAD(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_VIDEO_AGGREGATOR_PARALLEL_CONVERT_PAD))
#define GST_IS_VIDEO_AGGREGATOR_PARALLEL_CONVERT_PAD_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_VIDEO_AGGREGATOR_PARALLEL_CONVERT_PAD))
/**
* GstVideoAggregatorParallelConvertPad:
*
* An implementation of GstPad that can be used with #GstVideoAggregator.
*
* See #GstVideoAggregator for more details.
*
* Since: 1.20
*/
/**
* GstVideoAggregatorParallelConvertPadClass:
*
* Since: 1.20
*/
struct _GstVideoAggregatorParallelConvertPadClass
{
GstVideoAggregatorConvertPadClass parent_class;
/*< private >*/
gpointer _gst_reserved[GST_PADDING];
};
/**********************
* GstVideoAggregator *
*********************/
#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.
*
* Since: 1.16
*/
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 gst_video_aggregator_pad_get_prepared_frame()
* or directly use the #GstBuffer from gst_video_aggregator_pad_get_current_buffer()
* if it needs to map the buffer in a special way. The result of the
* aggregation should land in @outbuffer.
* @create_output_buffer: Optional.
* Lets subclasses provide a #GstBuffer to be used as @outbuffer of
* the #aggregate_frames vmethod.
* @find_best_format: Optional.
* Lets subclasses decide of the best common format to use.
*
* Since: 1.16
**/
struct _GstVideoAggregatorClass
{
/*< private >*/
GstAggregatorClass parent_class;
/*< public >*/
GstCaps * (*update_caps) (GstVideoAggregator * videoaggregator,
GstCaps * caps);
GstFlowReturn (*aggregate_frames) (GstVideoAggregator * videoaggregator,
GstBuffer * outbuffer);
GstFlowReturn (*create_output_buffer) (GstVideoAggregator * videoaggregator,
GstBuffer ** outbuffer);
void (*find_best_format) (GstVideoAggregator * vagg,
GstCaps * downstream_caps,
GstVideoInfo * best_info,
gboolean * at_least_one_alpha);
/* < private > */
gpointer _gst_reserved[GST_PADDING_LARGE];
};
GST_VIDEO_API
GType gst_video_aggregator_get_type (void);
GST_VIDEO_API
GstTaskPool * gst_video_aggregator_get_execution_task_pool (GstVideoAggregator * vagg);
G_DEFINE_AUTOPTR_CLEANUP_FUNC(GstVideoAggregator, gst_object_unref)
G_DEFINE_AUTOPTR_CLEANUP_FUNC(GstVideoAggregatorPad, gst_object_unref)
G_END_DECLS
#endif /* __GST_VIDEO_AGGREGATOR_H__ */
Reference in a new issue View git blame Copy permalink