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gstreamer/gst/audiovisualizers/gstspacescope.c
Stefan Sauer 124c9a7fa4 audiovisualizer: shorten base class name 
As suggested on IRC rename to AudioVisualizer. We use custom suffix on the type
to avoid clashing with other copies for the time being.
2012-07-16 22:02:44 +02:00

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/* GStreamer
* Copyright (C) <2011> Stefan Kost <ensonic@users.sf.net>
*
* gstspacescope.c: simple stereo visualizer
*
* 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.
*/
/**
* SECTION:element-spacescope
* @see_also: goom
*
* Spacescope is a simple audio visualisation element. It maps the left and
* right channel to x and y coordinates.
*
* <refsect2>
* <title>Example launch line</title>
* |[
* gst-launch audiotestsrc ! audioconvert ! spacescope ! ximagesink
* ]|
* </refsect2>
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdlib.h>
#include "gstspacescope.h"
static GstStaticPadTemplate gst_space_scope_src_template =
GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
#if G_BYTE_ORDER == G_BIG_ENDIAN
GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE ("xRGB"))
#else
GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE ("BGRx"))
#endif
);
static GstStaticPadTemplate gst_space_scope_sink_template =
GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("audio/x-raw, "
"format = (string) " GST_AUDIO_NE (S16) ", "
"layout = (string) interleaved, "
"rate = (int) [ 8000, 96000 ], "
"channels = (int) 2, " "channel-mask = (bitmask) 0x3")
);
GST_DEBUG_CATEGORY_STATIC (space_scope_debug);
#define GST_CAT_DEFAULT space_scope_debug
enum
{
PROP_0,
PROP_STYLE
};
enum
{
STYLE_DOTS = 0,
STYLE_LINES,
STYLE_COLOR_DOTS,
STYLE_COLOR_LINES,
NUM_STYLES
};
#define GST_TYPE_SPACE_SCOPE_STYLE (gst_space_scope_style_get_type ())
static GType
gst_space_scope_style_get_type (void)
{
static GType gtype = 0;
if (gtype == 0) {
static const GEnumValue values[] = {
{STYLE_DOTS, "draw dots (default)", "dots"},
{STYLE_LINES, "draw lines", "lines"},
{STYLE_COLOR_DOTS, "draw color dots", "color-dots"},
{STYLE_COLOR_LINES, "draw color lines", "color-lines"},
{0, NULL, NULL}
};
gtype = g_enum_register_static ("GstSpaceScopeStyle", values);
}
return gtype;
}
static void gst_space_scope_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_space_scope_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static void render_dots (GstAudioVisualizer * base, guint32 * vdata,
gint16 * adata, guint num_samples);
static void render_lines (GstAudioVisualizer * base, guint32 * vdata,
gint16 * adata, guint num_samples);
static void render_color_dots (GstAudioVisualizer * base, guint32 * vdata,
gint16 * adata, guint num_samples);
static void render_color_lines (GstAudioVisualizer * base, guint32 * vdata,
gint16 * adata, guint num_samples);
static gboolean gst_space_scope_render (GstAudioVisualizer * scope,
GstBuffer * audio, GstBuffer * video);
G_DEFINE_TYPE (GstSpaceScope, gst_space_scope, GST_TYPE_AUDIO_VISUALIZER);
static void
gst_space_scope_class_init (GstSpaceScopeClass * g_class)
{
GObjectClass *gobject_class = (GObjectClass *) g_class;
GstElementClass *element_class = (GstElementClass *) g_class;
GstAudioVisualizerClass *scope_class = (GstAudioVisualizerClass *) g_class;
gst_element_class_set_details_simple (element_class, "Stereo visualizer",
"Visualization",
"Simple stereo visualizer", "Stefan Kost <ensonic@users.sf.net>");
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_space_scope_src_template));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_space_scope_sink_template));
gobject_class->set_property = gst_space_scope_set_property;
gobject_class->get_property = gst_space_scope_get_property;
scope_class->render = GST_DEBUG_FUNCPTR (gst_space_scope_render);
g_object_class_install_property (gobject_class, PROP_STYLE,
g_param_spec_enum ("style", "drawing style",
"Drawing styles for the space scope display.",
GST_TYPE_SPACE_SCOPE_STYLE, STYLE_DOTS,
G_PARAM_CONSTRUCT | G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
}
static void
gst_space_scope_init (GstSpaceScope * scope)
{
/* do nothing */
}
static void
gst_space_scope_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstSpaceScope *scope = GST_SPACE_SCOPE (object);
switch (prop_id) {
case PROP_STYLE:
scope->style = g_value_get_enum (value);
switch (scope->style) {
case STYLE_DOTS:
scope->process = render_dots;
break;
case STYLE_LINES:
scope->process = render_lines;
break;
case STYLE_COLOR_DOTS:
scope->process = render_color_dots;
break;
case STYLE_COLOR_LINES:
scope->process = render_color_lines;
break;
}
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_space_scope_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstSpaceScope *scope = GST_SPACE_SCOPE (object);
switch (prop_id) {
case PROP_STYLE:
g_value_set_enum (value, scope->style);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
#include "gstdrawhelpers.h"
static void
render_dots (GstAudioVisualizer * base, guint32 * vdata, gint16 * adata,
guint num_samples)
{
guint i, s, x, y, ox, oy;
gfloat dx, dy;
guint w = base->width;
guint h = base->height;
/* draw dots 1st channel x, 2nd channel y */
dx = w / 65536.0;
ox = w / 2;
dy = h / 65536.0;
oy = h / 2;
s = 0;
for (i = 0; i < num_samples; i++) {
x = (guint) (ox + (gfloat) adata[s++] * dx);
y = (guint) (oy + (gfloat) adata[s++] * dy);
draw_dot (vdata, x, y, w, 0x00FFFFFF);
}
}
static void
render_lines (GstAudioVisualizer * base, guint32 * vdata, gint16 * adata,
guint num_samples)
{
guint i, s, x, y, ox, oy;
gfloat dx, dy;
guint w = base->width;
guint h = base->height;
gint x2, y2;
/* draw lines 1st channel x, 2nd channel y */
dx = (w - 1) / 65536.0;
ox = (w - 1) / 2;
dy = (h - 1) / 65536.0;
oy = (h - 1) / 2;
s = 0;
x2 = (guint) (ox + (gfloat) adata[s++] * dx);
y2 = (guint) (oy + (gfloat) adata[s++] * dy);
for (i = 1; i < num_samples; i++) {
x = (guint) (ox + (gfloat) adata[s++] * dx);
y = (guint) (oy + (gfloat) adata[s++] * dy);
draw_line_aa (vdata, x2, x, y2, y, w, 0x00FFFFFF);
x2 = x;
y2 = y;
}
}
#define CUTOFF_1 0.15
#define CUTOFF_2 0.45
#define RESONANCE (1.0/0.5)
#define filter(il, ir) G_STMT_START { \
f1l_h = il - (f1l_m * RESONANCE) - f1l_l; \
f1l_m += (f1l_h * CUTOFF_1); \
f1l_l += (f1l_m * CUTOFF_1); \
\
f2l_h = (f1l_m + f1l_h) - (f2l_m * RESONANCE) - f2l_l; \
f2l_m += (f2l_h * CUTOFF_2); \
f2l_l += (f2l_m * CUTOFF_2); \
\
f1r_h = ir - (f1r_m * RESONANCE) - f1r_l; \
f1r_m += (f1r_h * CUTOFF_1); \
f1r_l += (f1r_m * CUTOFF_1); \
\
f2r_h = (f1r_m + f1r_h) - (f2r_m * RESONANCE) - f2r_l; \
f2r_m += (f2r_h * CUTOFF_2); \
f2r_l += (f2r_m * CUTOFF_2); \
} G_STMT_END
static void
render_color_dots (GstAudioVisualizer * base, guint32 * vdata,
gint16 * adata, guint num_samples)
{
GstSpaceScope *scope = (GstSpaceScope *) base;
guint i, s;
gint x, y, ox, oy;
gfloat dx, dy;
gint w = base->width, w1 = w - 2;
gint h = base->height, h1 = h - 2;
gdouble il, ir;
gdouble f1l_l = scope->f1l_l, f1l_m = scope->f1l_m, f1l_h = scope->f1l_h;
gdouble f1r_l = scope->f1r_l, f1r_m = scope->f1r_m, f1r_h = scope->f1r_h;
gdouble f2l_l = scope->f2l_l, f2l_m = scope->f2l_m, f2l_h = scope->f2l_h;
gdouble f2r_l = scope->f2r_l, f2r_m = scope->f2r_m, f2r_h = scope->f2r_h;
/* draw dots 1st channel x, 2nd channel y */
ox = w / 2;
oy = h / 2;
dx = w / 65536.0;
dy = h / 65536.0;
s = 0;
for (i = 0; i < num_samples; i++) {
il = (gdouble) adata[s++];
ir = (gdouble) adata[s++];
filter (il, ir);
x = (gint) (ox + f1l_l * dx);
y = (gint) (oy + f1r_l * dy);
x = CLAMP (x, 0, w1);
y = CLAMP (y, 0, h1);
draw_dot_c (vdata, x, y, w, 0x00FF0000);
x = (gint) (ox + f2l_l * dx);
y = (gint) (oy + f2r_l * dy);
x = CLAMP (x, 0, w1);
y = CLAMP (y, 0, h1);
draw_dot_c (vdata, x, y, w, 0x0000FF00);
x = (gint) (ox + (f2l_m + f2l_h) * dx);
y = (gint) (oy + (f2r_m + f2r_h) * dy);
x = CLAMP (x, 0, w1);
y = CLAMP (y, 0, h1);
draw_dot_c (vdata, x, y, w, 0x000000FF);
}
scope->f1l_l = f1l_l;
scope->f1l_m = f1l_m;
scope->f1l_h = f1l_h;
scope->f1r_l = f1r_l;
scope->f1r_m = f1r_m;
scope->f1r_h = f1r_h;
scope->f2l_l = f2l_l;
scope->f2l_m = f2l_m;
scope->f2l_h = f2l_h;
scope->f2r_l = f2r_l;
scope->f2r_m = f2r_m;
scope->f2r_h = f2r_h;
}
static void
render_color_lines (GstAudioVisualizer * base, guint32 * vdata,
gint16 * adata, guint num_samples)
{
GstSpaceScope *scope = (GstSpaceScope *) base;
guint i, s;
gint x, y, ox, oy;
gfloat dx, dy;
gint w = base->width, w1 = w - 2;
gint h = base->height, h1 = h - 2;
gdouble il, ir;
gdouble f1l_l = scope->f1l_l, f1l_m = scope->f1l_m, f1l_h = scope->f1l_h;
gdouble f1r_l = scope->f1r_l, f1r_m = scope->f1r_m, f1r_h = scope->f1r_h;
gdouble f2l_l = scope->f2l_l, f2l_m = scope->f2l_m, f2l_h = scope->f2l_h;
gdouble f2r_l = scope->f2r_l, f2r_m = scope->f2r_m, f2r_h = scope->f2r_h;
gint x2, y2, x3, y3, x4, y4;
/* draw lines 1st channel x, 2nd channel y */
ox = w / 2;
oy = h / 2;
dx = w / 65536.0;
dy = h / 65536.0;
s = 0;
/* do first pixels */
il = (gdouble) adata[s++];
ir = (gdouble) adata[s++];
filter (il, ir);
x = (gint) (ox + f1l_l * dx);
y = (gint) (oy + f1r_l * dy);
x2 = CLAMP (x, 0, w1);
y2 = CLAMP (y, 0, h1);
x = (gint) (ox + f2l_l * dx);
y = (gint) (oy + f2r_l * dy);
x3 = CLAMP (x, 0, w1);
y3 = CLAMP (y, 0, h1);
x = (gint) (ox + (f2l_m + f2l_h) * dx);
y = (gint) (oy + (f2r_m + f2r_h) * dy);
x4 = CLAMP (x, 0, w1);
y4 = CLAMP (y, 0, h1);
for (i = 1; i < num_samples; i++) {
il = (gdouble) adata[s++];
ir = (gdouble) adata[s++];
filter (il, ir);
x = (gint) (ox + f1l_l * dx);
y = (gint) (oy + f1r_l * dy);
x = CLAMP (x, 0, w1);
y = CLAMP (y, 0, h1);
draw_line_aa (vdata, x2, x, y2, y, w, 0x00FF0000);
x2 = x;
y2 = y;
x = (gint) (ox + f2l_l * dx);
y = (gint) (oy + f2r_l * dy);
x = CLAMP (x, 0, w1);
y = CLAMP (y, 0, h1);
draw_line_aa (vdata, x3, x, y3, y, w, 0x0000FF00);
x3 = x;
y3 = y;
x = (gint) (ox + (f2l_m + f2l_h) * dx);
y = (gint) (oy + (f2r_m + f2r_h) * dy);
x = CLAMP (x, 0, w1);
y = CLAMP (y, 0, h1);
draw_line_aa (vdata, x4, x, y4, y, w, 0x000000FF);
x4 = x;
y4 = y;
}
scope->f1l_l = f1l_l;
scope->f1l_m = f1l_m;
scope->f1l_h = f1l_h;
scope->f1r_l = f1r_l;
scope->f1r_m = f1r_m;
scope->f1r_h = f1r_h;
scope->f2l_l = f2l_l;
scope->f2l_m = f2l_m;
scope->f2l_h = f2l_h;
scope->f2r_l = f2r_l;
scope->f2r_m = f2r_m;
scope->f2r_h = f2r_h;
}
static gboolean
gst_space_scope_render (GstAudioVisualizer * base, GstBuffer * audio,
GstBuffer * video)
{
GstSpaceScope *scope = GST_SPACE_SCOPE (base);
GstMapInfo vmap, amap;
guint num_samples;
gst_buffer_map (audio, &amap, GST_MAP_READ);
gst_buffer_map (video, &vmap, GST_MAP_WRITE);
num_samples =
amap.size / (GST_AUDIO_INFO_CHANNELS (&base->ainfo) * sizeof (gint16));
scope->process (base, (guint32 *) vmap.data, (gint16 *) amap.data,
num_samples);
gst_buffer_unmap (video, &vmap);
gst_buffer_unmap (audio, &amap);
return TRUE;
}
gboolean
gst_space_scope_plugin_init (GstPlugin * plugin)
{
GST_DEBUG_CATEGORY_INIT (space_scope_debug, "spacescope", 0, "spacescope");
return gst_element_register (plugin, "spacescope", GST_RANK_NONE,
GST_TYPE_SPACE_SCOPE);
}
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