gstreamer/gst/audiovisualizers/gstspacescope.c
Edward Hervey b78b980d72 Merge remote-tracking branch 'origin/master' into 0.11
Conflicts:
	ext/faac/gstfaac.c
	ext/opus/gstopusdec.c
	ext/opus/gstopusenc.c
	gst/audiovisualizers/gstspacescope.c
	gst/colorspace/colorspace.c
2011-11-25 12:48:58 +01:00

262 lines
7.3 KiB
C

/* 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) ", "
"rate = (int) [ 8000, 96000 ], " "channels = (int) 2")
);
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,
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"},
{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 (GstBaseAudioVisualizer * scope, guint32 * vdata,
gint16 * adata, guint num_samples);
static void render_lines (GstBaseAudioVisualizer * scope, guint32 * vdata,
gint16 * adata, guint num_samples);
static gboolean gst_space_scope_render (GstBaseAudioVisualizer * scope,
GstBuffer * audio, GstBuffer * video);
G_DEFINE_TYPE (GstSpaceScope, gst_space_scope, GST_TYPE_BASE_AUDIO_VISUALIZER);
static void
gst_space_scope_class_init (GstSpaceScopeClass * g_class)
{
GObjectClass *gobject_class = (GObjectClass *) g_class;
GstElementClass *element_class = (GstElementClass *) g_class;
GstBaseAudioVisualizerClass *scope_class =
(GstBaseAudioVisualizerClass *) 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;
}
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 (GstBaseAudioVisualizer * scope, guint32 * vdata, gint16 * adata,
guint num_samples)
{
guint i, s, x, y, ox, oy;
gfloat dx, dy;
guint w = scope->width;
/* draw dots 1st channel x, 2nd channel y */
dx = scope->width / 65536.0;
ox = scope->width / 2;
dy = scope->height / 65536.0;
oy = scope->height / 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 (GstBaseAudioVisualizer * scope, guint32 * vdata, gint16 * adata,
guint num_samples)
{
guint i, s, x, y, ox, oy;
gfloat dx, dy;
guint w = scope->width;
guint h = scope->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;
}
}
static gboolean
gst_space_scope_render (GstBaseAudioVisualizer * base, GstBuffer * audio,
GstBuffer * video)
{
GstSpaceScope *scope = GST_SPACE_SCOPE (base);
gsize asize;
guint32 *vdata =
(guint32 *) gst_buffer_map (video, NULL, NULL, GST_MAP_WRITE);
gint16 *adata = (gint16 *) gst_buffer_map (audio, &asize, NULL, GST_MAP_READ);
guint num_samples;
num_samples = asize / (base->channels * sizeof (gint16));
scope->process (base, vdata, adata, num_samples);
gst_buffer_unmap (video, vdata, -1);
gst_buffer_unmap (audio, adata, -1);
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);
}