gstreamer/gst/audiovisualizers/gstbaseaudiovisualizer.h
2012-02-07 12:02:49 +01:00

124 lines
4.6 KiB
C

/* GStreamer
* Copyright (C) <2011> Stefan Kost <ensonic@users.sf.net>
*
* gstbaseaudiovisualizer.c: base class for audio visualisation elements
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifndef __GST_BASE_AUDIO_VISUALIZER_H__
#define __GST_BASE_AUDIO_VISUALIZER_H__
#include <gst/gst.h>
#include <gst/base/gstbasetransform.h>
#include <gst/video/video.h>
#include <gst/audio/audio.h>
#include <gst/base/gstadapter.h>
G_BEGIN_DECLS
#define GST_TYPE_BASE_AUDIO_VISUALIZER (gst_base_audio_visualizer_get_type())
#define GST_BASE_AUDIO_VISUALIZER(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_BASE_AUDIO_VISUALIZER,GstBaseAudioVisualizer))
#define GST_BASE_AUDIO_VISUALIZER_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_BASE_AUDIO_VISUALIZER,GstBaseAudioVisualizerClass))
#define GST_IS_SYNAESTHESIA(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_BASE_AUDIO_VISUALIZER))
#define GST_IS_SYNAESTHESIA_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_BASE_AUDIO_VISUALIZER))
typedef struct _GstBaseAudioVisualizer GstBaseAudioVisualizer;
typedef struct _GstBaseAudioVisualizerClass GstBaseAudioVisualizerClass;
typedef void (*GstBaseAudioVisualizerShaderFunc)(GstBaseAudioVisualizer *scope, const guint8 *s, guint8 *d);
/**
* GstBaseAudioVisualizerShader:
* @GST_BASE_AUDIO_VISUALIZER_SHADER_NONE: no shading
* @GST_BASE_AUDIO_VISUALIZER_SHADER_FADE: plain fading
* @GST_BASE_AUDIO_VISUALIZER_SHADER_FADE_AND_MOVE_UP: fade and move up
* @GST_BASE_AUDIO_VISUALIZER_SHADER_FADE_AND_MOVE_DOWN: fade and move down
* @GST_BASE_AUDIO_VISUALIZER_SHADER_FADE_AND_MOVE_LEFT: fade and move left
* @GST_BASE_AUDIO_VISUALIZER_SHADER_FADE_AND_MOVE_RIGHT: fade and move right
* @GST_BASE_AUDIO_VISUALIZER_SHADER_FADE_AND_MOVE_HORIZ_OUT: fade and move horizontally out
* @GST_BASE_AUDIO_VISUALIZER_SHADER_FADE_AND_MOVE_HORIZ_IN: fade and move horizontally in
* @GST_BASE_AUDIO_VISUALIZER_SHADER_FADE_AND_MOVE_VERT_OUT: fade and move vertically out
* @GST_BASE_AUDIO_VISUALIZER_SHADER_FADE_AND_MOVE_VERT_IN: fade and move vertically in
*
* Different types of supported background shading functions.
*/
typedef enum {
GST_BASE_AUDIO_VISUALIZER_SHADER_NONE,
GST_BASE_AUDIO_VISUALIZER_SHADER_FADE,
GST_BASE_AUDIO_VISUALIZER_SHADER_FADE_AND_MOVE_UP,
GST_BASE_AUDIO_VISUALIZER_SHADER_FADE_AND_MOVE_DOWN,
GST_BASE_AUDIO_VISUALIZER_SHADER_FADE_AND_MOVE_LEFT,
GST_BASE_AUDIO_VISUALIZER_SHADER_FADE_AND_MOVE_RIGHT,
GST_BASE_AUDIO_VISUALIZER_SHADER_FADE_AND_MOVE_HORIZ_OUT,
GST_BASE_AUDIO_VISUALIZER_SHADER_FADE_AND_MOVE_HORIZ_IN,
GST_BASE_AUDIO_VISUALIZER_SHADER_FADE_AND_MOVE_VERT_OUT,
GST_BASE_AUDIO_VISUALIZER_SHADER_FADE_AND_MOVE_VERT_IN
} GstBaseAudioVisualizerShader;
struct _GstBaseAudioVisualizer
{
GstElement parent;
/* pads */
GstPad *srcpad, *sinkpad;
GstBufferPool *pool;
GstAdapter *adapter;
GstBuffer *inbuf;
guint8 *pixelbuf;
GstBaseAudioVisualizerShader shader_type;
GstBaseAudioVisualizerShaderFunc shader;
guint32 shade_amount;
guint spf; /* samples per video frame */
guint req_spf; /* min samples per frame wanted by the subclass */
/* video state */
GstVideoFormat video_format;
gint fps_n, fps_d;
gint width;
gint height;
guint64 frame_duration;
guint bpf; /* bytes per frame */
/* audio state */
GstAudioInfo ainfo;
/* configuration mutex */
GMutex config_lock;
/* QoS stuff *//* with LOCK */
gdouble proportion;
GstClockTime earliest_time;
GstSegment segment;
};
struct _GstBaseAudioVisualizerClass
{
GstElementClass parent_class;
/* virtual function, called whenever the format changes */
gboolean (*setup) (GstBaseAudioVisualizer * scope);
/* virtual function for rendering a frame */
gboolean (*render) (GstBaseAudioVisualizer * scope, GstBuffer * audio, GstBuffer * video);
};
GType gst_base_audio_visualizer_get_type (void);
G_END_DECLS
#endif /* __GST_BASE_AUDIO_VISUALIZER_H__ */