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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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5e6abc449b
Add a copy of the base class until it is stable. Right now the extra effects of the baseclass are not supported as the sublass overwrites the buffer instead of blending.
125 lines
4.6 KiB
C
125 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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* gstbaseaudiovisualizer.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_AUDIO_VISUALIZER_H__
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#define __GST_BASE_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_BASE_AUDIO_VISUALIZER (gst_base_audio_visualizer_get_type())
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#define GST_BASE_AUDIO_VISUALIZER(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_BASE_AUDIO_VISUALIZER,GstBaseAudioVisualizer))
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#define GST_BASE_AUDIO_VISUALIZER_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_BASE_AUDIO_VISUALIZER,GstBaseAudioVisualizerClass))
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#define GST_IS_SYNAESTHESIA(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_BASE_AUDIO_VISUALIZER))
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#define GST_IS_SYNAESTHESIA_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_BASE_AUDIO_VISUALIZER))
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typedef struct _GstBaseAudioVisualizer GstBaseAudioVisualizer;
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typedef struct _GstBaseAudioVisualizerClass GstBaseAudioVisualizerClass;
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typedef void (*GstBaseAudioVisualizerShaderFunc)(GstBaseAudioVisualizer *scope, const guint8 *s, guint8 *d);
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/**
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* GstBaseAudioVisualizerShader:
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* @GST_BASE_AUDIO_VISUALIZER_SHADER_NONE: no shading
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* @GST_BASE_AUDIO_VISUALIZER_SHADER_FADE: plain fading
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* @GST_BASE_AUDIO_VISUALIZER_SHADER_FADE_AND_MOVE_UP: fade and move up
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* @GST_BASE_AUDIO_VISUALIZER_SHADER_FADE_AND_MOVE_DOWN: fade and move down
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* @GST_BASE_AUDIO_VISUALIZER_SHADER_FADE_AND_MOVE_LEFT: fade and move left
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* @GST_BASE_AUDIO_VISUALIZER_SHADER_FADE_AND_MOVE_RIGHT: fade and move right
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* @GST_BASE_AUDIO_VISUALIZER_SHADER_FADE_AND_MOVE_HORIZ_OUT: fade and move horizontally out
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* @GST_BASE_AUDIO_VISUALIZER_SHADER_FADE_AND_MOVE_HORIZ_IN: fade and move horizontally in
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* @GST_BASE_AUDIO_VISUALIZER_SHADER_FADE_AND_MOVE_VERT_OUT: fade and move vertically out
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* @GST_BASE_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_BASE_AUDIO_VISUALIZER_SHADER_NONE,
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GST_BASE_AUDIO_VISUALIZER_SHADER_FADE,
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GST_BASE_AUDIO_VISUALIZER_SHADER_FADE_AND_MOVE_UP,
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GST_BASE_AUDIO_VISUALIZER_SHADER_FADE_AND_MOVE_DOWN,
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GST_BASE_AUDIO_VISUALIZER_SHADER_FADE_AND_MOVE_LEFT,
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GST_BASE_AUDIO_VISUALIZER_SHADER_FADE_AND_MOVE_RIGHT,
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GST_BASE_AUDIO_VISUALIZER_SHADER_FADE_AND_MOVE_HORIZ_OUT,
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GST_BASE_AUDIO_VISUALIZER_SHADER_FADE_AND_MOVE_HORIZ_IN,
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GST_BASE_AUDIO_VISUALIZER_SHADER_FADE_AND_MOVE_VERT_OUT,
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GST_BASE_AUDIO_VISUALIZER_SHADER_FADE_AND_MOVE_VERT_IN
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} GstBaseAudioVisualizerShader;
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struct _GstBaseAudioVisualizer
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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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GstBufferPool *pool;
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GstAdapter *adapter;
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GstBuffer *inbuf;
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guint8 *pixelbuf;
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GstBaseAudioVisualizerShader shader_type;
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GstBaseAudioVisualizerShaderFunc 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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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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guint64 frame_duration;
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guint bpf; /* bytes per frame */
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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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};
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struct _GstBaseAudioVisualizerClass
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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) (GstBaseAudioVisualizer * scope);
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/* virtual function for rendering a frame */
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gboolean (*render) (GstBaseAudioVisualizer * scope, GstBuffer * audio, GstBuffer * video);
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};
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GType gst_base_audio_visualizer_get_type (void);
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G_END_DECLS
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#endif /* __GST_BASE_AUDIO_VISUALIZER_H__ */
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