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2271946d73
This allows e.g. FFT based elements to require enough data. If they need more data than what we get, we flush less from the adapter. https://bugzilla.gnome.org/show_bug.cgi?id=651536
82 lines
2.6 KiB
C
82 lines
2.6 KiB
C
/* GStreamer
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* Copyright (C) <2011> Stefan Kost <ensonic@users.sf.net>
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*
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* gstbasescope.c: base class for audio visualisation elements
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifndef __GST_BASE_SCOPE_H__
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#define __GST_BASE_SCOPE_H__
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#include <gst/gst.h>
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#include <gst/base/gstbasetransform.h>
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#include <gst/video/video.h>
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#include <gst/audio/audio.h>
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#include <gst/base/gstadapter.h>
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G_BEGIN_DECLS
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#define GST_TYPE_BASE_SCOPE (gst_base_scope_get_type())
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#define GST_BASE_SCOPE(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_BASE_SCOPE,GstBaseScope))
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#define GST_BASE_SCOPE_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_BASE_SCOPE,GstBaseScopeClass))
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#define GST_IS_SYNAESTHESIA(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_BASE_SCOPE))
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#define GST_IS_SYNAESTHESIA_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_BASE_SCOPE))
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typedef struct _GstBaseScope GstBaseScope;
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typedef struct _GstBaseScopeClass GstBaseScopeClass;
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struct _GstBaseScope
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{
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GstElement parent;
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/* pads */
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GstPad *srcpad, *sinkpad;
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GstAdapter *adapter;
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GstBuffer *inbuf;
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guint64 next_ts; /* the timestamp of the next frame */
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guint64 frame_duration;
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guint bps; /* bytes per sample */
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guint spf; /* samples per video frame */
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guint req_spf; /* min samples per frame wanted by the subclass */
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/* video state */
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GstVideoFormat video_format;
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gint fps_n, fps_d;
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gint width;
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gint height;
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gint channels;
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/* audio state */
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gint sample_rate;
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gint rate;
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};
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struct _GstBaseScopeClass
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{
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GstElementClass parent_class;
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/* virtual function, called whenever the format changes */
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gboolean (*setup) (GstBaseScope * scope);
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/* virtual function for rendering a frame */
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gboolean (*render) (GstBaseScope * scope, GstBuffer * audio, GstBuffer * video);
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};
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GType gst_base_scope_get_type (void);
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G_END_DECLS
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#endif /* __GST_BASE_SCOPE_H__ */
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