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248 lines
10 KiB
C
248 lines
10 KiB
C
/* Generic video aggregator plugin
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* Copyright (C) 2008 Wim Taymans <wim@fluendo.com>
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* Copyright (C) 2010 Sebastian Dröge <sebastian.droege@collabora.co.uk>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 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
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#ifndef __GST_VIDEO_AGGREGATOR_H__
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#define __GST_VIDEO_AGGREGATOR_H__
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#ifndef GST_USE_UNSTABLE_API
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#warning "The Video library from gst-plugins-bad is unstable API and may change in future."
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#warning "You can define GST_USE_UNSTABLE_API to avoid this warning."
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#endif
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#include <gst/gst.h>
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#include <gst/video/video.h>
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#include <gst/base/gstaggregator.h>
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#include <gst/video/video-bad-prelude.h>
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G_BEGIN_DECLS
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typedef struct _GstVideoAggregator GstVideoAggregator;
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typedef struct _GstVideoAggregatorClass GstVideoAggregatorClass;
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typedef struct _GstVideoAggregatorPrivate GstVideoAggregatorPrivate;
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/*************************
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* GstVideoAggregatorPad *
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*************************/
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#define GST_TYPE_VIDEO_AGGREGATOR_PAD (gst_video_aggregator_pad_get_type())
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#define GST_VIDEO_AGGREGATOR_PAD(obj) \
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(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_VIDEO_AGGREGATOR_PAD, GstVideoAggregatorPad))
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#define GST_VIDEO_AGGREGATOR_PAD_CAST(obj) ((GstVideoAggregatorPad *)(obj))
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#define GST_VIDEO_AGGREGATOR_PAD_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_VIDEO_AGGREGATOR_PAD, GstVideoAggregatorPadClass))
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#define GST_IS_VIDEO_AGGREGATOR_PAD(obj) \
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(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_VIDEO_AGGREGATOR_PAD))
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#define GST_IS_VIDEO_AGGREGATOR_PAD_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_VIDEO_AGGREGATOR_PAD))
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#define GST_VIDEO_AGGREGATOR_PAD_GET_CLASS(obj) \
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(G_TYPE_INSTANCE_GET_CLASS((obj),GST_TYPE_VIDEO_AGGREGATOR_PAD,GstVideoAggregatorPadClass))
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typedef struct _GstVideoAggregatorPad GstVideoAggregatorPad;
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typedef struct _GstVideoAggregatorPadClass GstVideoAggregatorPadClass;
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typedef struct _GstVideoAggregatorPadPrivate GstVideoAggregatorPadPrivate;
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/**
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* GstVideoAggregatorPad:
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* @info: The #GstVideoInfo currently set on the pad
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*/
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struct _GstVideoAggregatorPad
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{
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GstAggregatorPad parent;
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/*< public >*/
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/* read-only, with OBJECT_LOCK */
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GstVideoInfo info;
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/* < private > */
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GstVideoAggregatorPadPrivate *priv;
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gpointer _gst_reserved[GST_PADDING];
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};
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/**
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* GstVideoAggregatorPadClass:
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*
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* @update_conversion_info: Called when either the input or output formats
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* have changed.
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* @prepare_frame: Prepare the frame from the pad buffer and sets it to prepared_frame
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* @clean_frame: clean the frame previously prepared in prepare_frame
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*/
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struct _GstVideoAggregatorPadClass
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{
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GstAggregatorPadClass parent_class;
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void (*update_conversion_info) (GstVideoAggregatorPad * pad);
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gboolean (*prepare_frame) (GstVideoAggregatorPad * pad,
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GstVideoAggregator * videoaggregator,
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GstBuffer * buffer,
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GstVideoFrame * prepared_frame);
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void (*clean_frame) (GstVideoAggregatorPad * pad,
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GstVideoAggregator * videoaggregator,
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GstVideoFrame * prepared_frame);
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gpointer _gst_reserved[GST_PADDING_LARGE];
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};
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GST_VIDEO_BAD_API
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GType gst_video_aggregator_pad_get_type (void);
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GST_VIDEO_BAD_API
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gboolean gst_video_aggregator_pad_has_current_buffer (GstVideoAggregatorPad *pad);
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GST_VIDEO_BAD_API
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GstBuffer * gst_video_aggregator_pad_get_current_buffer (GstVideoAggregatorPad *pad);
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GST_VIDEO_BAD_API
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GstVideoFrame * gst_video_aggregator_pad_get_prepared_frame (GstVideoAggregatorPad *pad);
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GST_VIDEO_BAD_API
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void gst_video_aggregator_pad_set_needs_alpha (GstVideoAggregatorPad *pad, gboolean needs_alpha);
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/********************************
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* GstVideoAggregatorConvertPad *
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*******************************/
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#define GST_TYPE_VIDEO_AGGREGATOR_CONVERT_PAD (gst_video_aggregator_convert_pad_get_type())
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#define GST_VIDEO_AGGREGATOR_CONVERT_PAD(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_VIDEO_AGGREGATOR_CONVERT_PAD, GstVideoAggregatorConvertPad))
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#define GST_VIDEO_AGGREGATOR_CONVERT_PAD_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_VIDEO_AGGREGATOR_CONVERT_PAD, GstVideoAggregatorConvertPadClass))
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#define GST_VIDEO_AGGREGATOR_CONVERT_PAD_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj),GST_TYPE_VIDEO_AGGREGATOR_CONVERT_PAD, GstVideoAggregatorConvertPadClass))
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#define GST_IS_VIDEO_AGGREGATOR_CONVERT_PAD(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_VIDEO_AGGREGATOR_CONVERT_PAD))
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#define GST_IS_VIDEO_AGGREGATOR_CONVERT_PAD_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_VIDEO_AGGREGATOR_CONVERT_PAD))
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typedef struct _GstVideoAggregatorConvertPad GstVideoAggregatorConvertPad;
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typedef struct _GstVideoAggregatorConvertPadClass GstVideoAggregatorConvertPadClass;
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typedef struct _GstVideoAggregatorConvertPadPrivate GstVideoAggregatorConvertPadPrivate;
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/**
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* GstVideoAggregatorConvertPad:
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*
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* An implementation of GstPad that can be used with #GstVideoAggregator.
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*
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* See #GstVideoAggregator for more details.
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*/
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struct _GstVideoAggregatorConvertPad
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{
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/*< private >*/
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GstVideoAggregatorPad parent;
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GstVideoAggregatorConvertPadPrivate *priv;
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gpointer _gst_reserved[GST_PADDING];
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};
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/**
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* GstVideoAggregatorConvertPadClass:
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*
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*/
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struct _GstVideoAggregatorConvertPadClass
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{
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GstVideoAggregatorPadClass parent_class;
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void (*create_conversion_info) (GstVideoAggregatorConvertPad *pad, GstVideoAggregator *agg, GstVideoInfo *conversion_info);
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/*< private >*/
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gpointer _gst_reserved[GST_PADDING];
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};
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GST_VIDEO_BAD_API
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GType gst_video_aggregator_convert_pad_get_type (void);
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GST_VIDEO_BAD_API
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void gst_video_aggregator_convert_pad_update_conversion_info (GstVideoAggregatorConvertPad * pad);
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/**********************
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* GstVideoAggregator *
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*********************/
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#define GST_TYPE_VIDEO_AGGREGATOR (gst_video_aggregator_get_type())
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#define GST_VIDEO_AGGREGATOR(obj) \
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(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_VIDEO_AGGREGATOR, GstVideoAggregator))
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#define GST_VIDEO_AGGREGATOR_CAST(obj) ((GstVideoAggregator *)(obj))
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#define GST_VIDEO_AGGREGATOR_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_VIDEO_AGGREGATOR, GstVideoAggregatorClass))
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#define GST_IS_VIDEO_AGGREGATOR(obj) \
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(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_VIDEO_AGGREGATOR))
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#define GST_IS_VIDEO_AGGREGATOR_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_VIDEO_AGGREGATOR))
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#define GST_VIDEO_AGGREGATOR_GET_CLASS(obj) \
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(G_TYPE_INSTANCE_GET_CLASS((obj),GST_TYPE_VIDEO_AGGREGATOR,GstVideoAggregatorClass))
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/**
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* GstVideoAggregator:
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* @info: The #GstVideoInfo representing the currently set
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* srcpad caps.
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*/
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struct _GstVideoAggregator
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{
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GstAggregator aggregator;
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/*< public >*/
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/* Output caps */
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GstVideoInfo info;
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/* < private > */
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GstVideoAggregatorPrivate *priv;
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gpointer _gst_reserved[GST_PADDING_LARGE];
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};
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/**
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* GstVideoAggregatorClass:
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* @update_caps: Optional.
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* Lets subclasses update the #GstCaps representing
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* the src pad caps before usage. Return %NULL to indicate failure.
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* @aggregate_frames: Lets subclasses aggregate frames that are ready. Subclasses
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* should iterate the GstElement.sinkpads and use the already
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* mapped #GstVideoFrame from gst_video_aggregator_pad_get_prepared_frame()
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* or directly use the #GstBuffer from gst_video_aggregator_pad_get_current_buffer()
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* if it needs to map the buffer in a special way. The result of the
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* aggregation should land in @outbuffer.
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* @create_output_buffer: Optional.
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* Lets subclasses provide a #GstBuffer to be used as @outbuffer of
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* the #aggregate_frames vmethod.
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* @find_best_format: Optional.
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* Lets subclasses decide of the best common format to use.
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**/
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struct _GstVideoAggregatorClass
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{
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/*< private >*/
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GstAggregatorClass parent_class;
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/*< public >*/
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GstCaps * (*update_caps) (GstVideoAggregator * videoaggregator,
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GstCaps * caps);
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GstFlowReturn (*aggregate_frames) (GstVideoAggregator * videoaggregator,
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GstBuffer * outbuffer);
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GstFlowReturn (*create_output_buffer) (GstVideoAggregator * videoaggregator,
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GstBuffer ** outbuffer);
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void (*find_best_format) (GstVideoAggregator * vagg,
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GstCaps * downstream_caps,
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GstVideoInfo * best_info,
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gboolean * at_least_one_alpha);
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/* < private > */
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gpointer _gst_reserved[GST_PADDING_LARGE];
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};
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GST_VIDEO_BAD_API
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GType gst_video_aggregator_get_type (void);
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G_END_DECLS
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#endif /* __GST_VIDEO_AGGREGATOR_H__ */
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