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008fa0770b
Use macros to simplyfy the shading code. Those will ease to add support for other colorspaces in the future. Add more variants for the shading (left,right, horiz-in, vert-out, vert-in).
122 lines
4.6 KiB
C
122 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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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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guint64 next_ts; /* the timestamp of the next frame */
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guint64 frame_duration;
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guint bpf; /* bytes per frame */
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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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/* configuration mutex */
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GMutex *config_lock;
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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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