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cad9759e7b
We need different export decorators for the different libs. For now no actual change though, just rename before the release, and add prelude headers to define the new decorator to GST_EXPORT.
108 lines
4.3 KiB
C
108 lines
4.3 KiB
C
/* GStreamer
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* Copyright (C) <2011> Stefan Kost <ensonic@users.sf.net>
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* Copyright (C) <2015> Luis de Bethencourt <luis@debethencourt.com>
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*
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* gstaudiovisualizer.c: base class for audio visualisation elements
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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_AUDIO_VISUALIZER_H__
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#define __GST_AUDIO_VISUALIZER_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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#include <gst/pbutils/pbutils-prelude.h>
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G_BEGIN_DECLS
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#define GST_TYPE_AUDIO_VISUALIZER (gst_audio_visualizer_get_type())
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#define GST_AUDIO_VISUALIZER(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_AUDIO_VISUALIZER,GstAudioVisualizer))
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#define GST_AUDIO_VISUALIZER_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_AUDIO_VISUALIZER,GstAudioVisualizerClass))
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#define GST_AUDIO_VISUALIZER_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS((obj),GST_TYPE_AUDIO_VISUALIZER,GstAudioVisualizerClass))
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#define GST_IS_SYNAESTHESIA(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_AUDIO_VISUALIZER))
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#define GST_IS_SYNAESTHESIA_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_AUDIO_VISUALIZER))
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typedef struct _GstAudioVisualizer GstAudioVisualizer;
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typedef struct _GstAudioVisualizerClass GstAudioVisualizerClass;
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typedef struct _GstAudioVisualizerPrivate GstAudioVisualizerPrivate;
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typedef void (*GstAudioVisualizerShaderFunc)(GstAudioVisualizer *scope, const GstVideoFrame *s, GstVideoFrame *d);
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/**
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* GstAudioVisualizerShader:
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* @GST_AUDIO_VISUALIZER_SHADER_NONE: no shading
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* @GST_AUDIO_VISUALIZER_SHADER_FADE: plain fading
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* @GST_AUDIO_VISUALIZER_SHADER_FADE_AND_MOVE_UP: fade and move up
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* @GST_AUDIO_VISUALIZER_SHADER_FADE_AND_MOVE_DOWN: fade and move down
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* @GST_AUDIO_VISUALIZER_SHADER_FADE_AND_MOVE_LEFT: fade and move left
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* @GST_AUDIO_VISUALIZER_SHADER_FADE_AND_MOVE_RIGHT: fade and move right
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* @GST_AUDIO_VISUALIZER_SHADER_FADE_AND_MOVE_HORIZ_OUT: fade and move horizontally out
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* @GST_AUDIO_VISUALIZER_SHADER_FADE_AND_MOVE_HORIZ_IN: fade and move horizontally in
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* @GST_AUDIO_VISUALIZER_SHADER_FADE_AND_MOVE_VERT_OUT: fade and move vertically out
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* @GST_AUDIO_VISUALIZER_SHADER_FADE_AND_MOVE_VERT_IN: fade and move vertically in
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*
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* Different types of supported background shading functions.
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*/
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typedef enum {
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GST_AUDIO_VISUALIZER_SHADER_NONE,
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GST_AUDIO_VISUALIZER_SHADER_FADE,
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GST_AUDIO_VISUALIZER_SHADER_FADE_AND_MOVE_UP,
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GST_AUDIO_VISUALIZER_SHADER_FADE_AND_MOVE_DOWN,
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GST_AUDIO_VISUALIZER_SHADER_FADE_AND_MOVE_LEFT,
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GST_AUDIO_VISUALIZER_SHADER_FADE_AND_MOVE_RIGHT,
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GST_AUDIO_VISUALIZER_SHADER_FADE_AND_MOVE_HORIZ_OUT,
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GST_AUDIO_VISUALIZER_SHADER_FADE_AND_MOVE_HORIZ_IN,
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GST_AUDIO_VISUALIZER_SHADER_FADE_AND_MOVE_VERT_OUT,
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GST_AUDIO_VISUALIZER_SHADER_FADE_AND_MOVE_VERT_IN
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} GstAudioVisualizerShader;
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struct _GstAudioVisualizer
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{
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GstElement parent;
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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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GstVideoInfo vinfo;
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/* audio state */
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GstAudioInfo ainfo;
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/* <private> */
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GstAudioVisualizerPrivate *priv;
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};
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struct _GstAudioVisualizerClass
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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) (GstAudioVisualizer * scope);
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/* virtual function for rendering a frame */
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gboolean (*render) (GstAudioVisualizer * scope, GstBuffer * audio, GstVideoFrame * video);
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gboolean (*decide_allocation) (GstAudioVisualizer * scope, GstQuery *query);
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};
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GST_PBUTILS_API
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GType gst_audio_visualizer_get_type (void);
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G_END_DECLS
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#endif /* __GST_AUDIO_VISUALIZER_H__ */
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