1 /* gstgoom.c: implementation of goom drawing element
2 * Copyright (C) <2001> Richard Boulton <richard@tartarus.org>
3 * (C) <2006> Wim Taymans <wim at fluendo dot com>
4 * (C) <2015> Luis de Bethencourt <luis@debethencourt.com>
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Library General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
10 *
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Library General Public License for more details.
15 *
16 * You should have received a copy of the GNU Library General Public
17 * License along with this library; if not, write to the
18 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
19 * Boston, MA 02110-1301, USA.
20 */
21
22 /**
23 * SECTION:element-goom2k1
24 * @title: goom2k1
25 * @see_also: goom, synaesthesia
26 *
27 * Goom2k1 is an audio visualisation element. It creates warping structures
28 * based on the incoming audio signal. Goom2k1 is the older version of the
29 * visualisation. Also available is goom2k4, with a different look.
30 *
31 * ## Example launch line
32 * |[
33 * gst-launch-1.0 -v audiotestsrc ! goom2k1 ! videoconvert ! xvimagesink
34 * ]|
35 *
36 */
37
38 #ifdef HAVE_CONFIG_H
39 #include "config.h"
40 #endif
41
42 #include <string.h>
43 #include "gstgoom.h"
44 #include "goom_core.h"
45
46 GST_DEBUG_CATEGORY_STATIC (goom2k1_debug);
47 #define GST_CAT_DEFAULT goom2k1_debug
48
49 #define DEFAULT_WIDTH 320
50 #define DEFAULT_HEIGHT 240
51 #define DEFAULT_FPS_N 25
52 #define DEFAULT_FPS_D 1
53
54 #if G_BYTE_ORDER == G_BIG_ENDIAN
55 #define RGB_ORDER "xRGB"
56 #else
57 #define RGB_ORDER "BGRx"
58 #endif
59
60 static GstStaticPadTemplate src_template = GST_STATIC_PAD_TEMPLATE ("src",
61 GST_PAD_SRC,
62 GST_PAD_ALWAYS,
63 GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE (RGB_ORDER))
64 );
65
66 static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink", /* the name of the pads */
67 GST_PAD_SINK, /* type of the pad */
68 GST_PAD_ALWAYS, /* ALWAYS/SOMETIMES */
69 GST_STATIC_CAPS ("audio/x-raw, "
70 "format = (string) " GST_AUDIO_NE (S16) ", "
71 "rate = (int) [ 8000, 96000 ], "
72 "channels = (int) 1, "
73 "layout = (string) interleaved; "
74 "audio/x-raw, "
75 "format = (string) " GST_AUDIO_NE (S16) ", "
76 "rate = (int) [ 8000, 96000 ], "
77 "channels = (int) 2, "
78 "channel-mask = (bitmask) 0x3, " "layout = (string) interleaved")
79 );
80
81 static void gst_goom2k1_finalize (GObject * object);
82
83 static gboolean gst_goom2k1_setup (GstAudioVisualizer * base);
84 static gboolean gst_goom2k1_render (GstAudioVisualizer * base,
85 GstBuffer * audio, GstVideoFrame * video);
86
87
88 G_DEFINE_TYPE (GstGoom2k1, gst_goom2k1, GST_TYPE_AUDIO_VISUALIZER);
89 GST_ELEMENT_REGISTER_DEFINE (goom2k1, "goom2k1", GST_RANK_NONE,
90 GST_TYPE_GOOM2K1);
91 static void
gst_goom2k1_class_init(GstGoom2k1Class * klass)92 gst_goom2k1_class_init (GstGoom2k1Class * klass)
93 {
94 GObjectClass *gobject_class;
95 GstElementClass *gstelement_class;
96 GstAudioVisualizerClass *visualizer_class;
97
98 gobject_class = (GObjectClass *) klass;
99 gstelement_class = (GstElementClass *) klass;
100 visualizer_class = (GstAudioVisualizerClass *) klass;
101
102 gobject_class->finalize = gst_goom2k1_finalize;
103
104 gst_element_class_set_static_metadata (gstelement_class,
105 "GOOM: what a GOOM! 2k1 edition", "Visualization",
106 "Takes frames of data and outputs video frames using the GOOM 2k1 filter",
107 "Wim Taymans <wim@fluendo.com>");
108 gst_element_class_add_static_pad_template (gstelement_class, &sink_template);
109 gst_element_class_add_static_pad_template (gstelement_class, &src_template);
110
111 GST_DEBUG_CATEGORY_INIT (goom2k1_debug, "goom2k1", 0,
112 "goom2k1 visualisation element");
113
114 visualizer_class->setup = GST_DEBUG_FUNCPTR (gst_goom2k1_setup);
115 visualizer_class->render = GST_DEBUG_FUNCPTR (gst_goom2k1_render);
116 }
117
118 static void
gst_goom2k1_init(GstGoom2k1 * goom)119 gst_goom2k1_init (GstGoom2k1 * goom)
120 {
121 goom->width = DEFAULT_WIDTH;
122 goom->height = DEFAULT_HEIGHT;
123 goom->channels = 0;
124
125 goom_init (&(goom->goomdata), goom->width, goom->height);
126 }
127
128 static void
gst_goom2k1_finalize(GObject * object)129 gst_goom2k1_finalize (GObject * object)
130 {
131 GstGoom2k1 *goom = GST_GOOM2K1 (object);
132
133 goom_close (&(goom->goomdata));
134
135 G_OBJECT_CLASS (gst_goom2k1_parent_class)->finalize (object);
136 }
137
138 static gboolean
gst_goom2k1_setup(GstAudioVisualizer * base)139 gst_goom2k1_setup (GstAudioVisualizer * base)
140 {
141 GstGoom2k1 *goom = GST_GOOM2K1 (base);
142
143 goom->width = GST_VIDEO_INFO_WIDTH (&base->vinfo);
144 goom->height = GST_VIDEO_INFO_HEIGHT (&base->vinfo);
145
146 goom_set_resolution (&(goom->goomdata), goom->width, goom->height);
147
148 return TRUE;
149 }
150
151 static gboolean
gst_goom2k1_render(GstAudioVisualizer * base,GstBuffer * audio,GstVideoFrame * video)152 gst_goom2k1_render (GstAudioVisualizer * base, GstBuffer * audio,
153 GstVideoFrame * video)
154 {
155 GstGoom2k1 *goom = GST_GOOM2K1 (base);
156 GstMapInfo amap;
157 gint16 datain[2][GOOM2K1_SAMPLES];
158 gint16 *adata;
159 gint i;
160
161 /* get next GOOM2K1_SAMPLES, we have at least this amount of samples */
162 gst_buffer_map (audio, &amap, GST_MAP_READ);
163 adata = (gint16 *) amap.data;
164
165 if (goom->channels == 2) {
166 for (i = 0; i < GOOM2K1_SAMPLES; i++) {
167 datain[0][i] = *adata++;
168 datain[1][i] = *adata++;
169 }
170 } else {
171 for (i = 0; i < GOOM2K1_SAMPLES; i++) {
172 datain[0][i] = *adata;
173 datain[1][i] = *adata++;
174 }
175 }
176
177 video->data[0] = goom_update (&(goom->goomdata), datain);
178 gst_buffer_unmap (audio, &amap);
179
180 return TRUE;
181 }
182
183 static gboolean
plugin_init(GstPlugin * plugin)184 plugin_init (GstPlugin * plugin)
185 {
186 return GST_ELEMENT_REGISTER (goom2k1, plugin);
187 }
188
189 GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
190 GST_VERSION_MINOR,
191 goom2k1,
192 "GOOM 2k1 visualization filter",
193 plugin_init, VERSION, GST_LICENSE, GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)
194