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130 lines
4.6 KiB
C
130 lines
4.6 KiB
C
/* GStreamer
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* Copyright (C) <2011> Stefan Kost <ensonic@users.sf.net>
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*
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* 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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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_AUDIO_VISUALIZER(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_AUDIO_VISUALIZER))
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#define GST_IS_AUDIO_VISUALIZER_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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/* pads */
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GstPad *srcpad, *sinkpad;
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GstAdapter *adapter;
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GstBuffer *inbuf;
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GstBuffer *tempbuf;
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GstVideoFrame tempframe;
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GstAudioVisualizerShader shader_type;
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GstAudioVisualizerShaderFunc shader;
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guint32 shade_amount;
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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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GstVideoInfo vinfo;
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guint64 frame_duration;
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/* audio state */
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GstAudioInfo ainfo;
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/* configuration mutex */
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GMutex config_lock;
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/* QoS stuff *//* with LOCK */
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gdouble proportion;
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GstClockTime earliest_time;
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GstSegment segment;
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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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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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