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When set, it causes videoaggregator to repeatedly aggregate the last buffer on an EOS pad instead of skipping it and outputting silence. This is useful, for instance, while playing back files seamless one after the other, to avoid videoaggregator ever outputting silence (the checkerboard pattern). It is to be noted that if all the pads on videoaggregator have this property set on them, the mixer will never forward EOS downstream for obvious reasons. Hence, at least one pad with 'ignore-eos' set to FALSE must send EOS to the mixer before it will be forwarded downstream. https://bugzilla.gnome.org/show_bug.cgi?id=748946
112 lines
4.3 KiB
C
112 lines
4.3 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_PAD_H__
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#define __GST_VIDEO_AGGREGATOR_PAD_H__
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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 "gstvideoaggregator.h"
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G_BEGIN_DECLS
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#define GST_TYPE_VIDEO_AGGREGATOR_PAD (gst_videoaggregator_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_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_COMPOSITOR_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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* @buffer_vinfo: The #GstVideoInfo representing the type contained
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* in @buffer
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* @aggregated_frame: The #GstVideoFrame ready to be used for aggregation
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* inside the aggregate_frames vmethod.
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* @zorder: The zorder of this 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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GstVideoInfo info;
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GstBuffer *buffer;
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/* The caps on the pad may not match the buffer above because of two reasons:
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* 1) When caps change, the info above will get updated, but the buffer might
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* not since it might be pending on the GstAggregatorPad
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* 2) We might reject the new buffer in fill_queues() and reuse a previous
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* buffer which has older GstVideoInfo
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* Hence, we need to maintain a GstVideoInfo for mapping buffers separately */
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GstVideoInfo buffer_vinfo;
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GstVideoFrame *aggregated_frame;
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/* properties */
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guint zorder;
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gboolean ignore_eos;
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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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* @set_info: Lets subclass set a converter on the pad,
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* right after a new format has been negotiated.
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* @prepare_frame: Prepare the frame from the pad buffer (if any)
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* and sets it to @aggregated_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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gboolean (*set_info) (GstVideoAggregatorPad * pad,
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GstVideoAggregator * videoaggregator,
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GstVideoInfo * current_info,
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GstVideoInfo * wanted_info);
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gboolean (*prepare_frame) (GstVideoAggregatorPad * pad,
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GstVideoAggregator * videoaggregator);
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void (*clean_frame) (GstVideoAggregatorPad * pad,
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GstVideoAggregator * videoaggregator);
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gpointer _gst_reserved[GST_PADDING_LARGE];
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};
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GType gst_videoaggregator_pad_get_type (void);
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G_END_DECLS
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#endif /* __GST_VIDEO_AGGREGATOR_PAD_H__ */
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