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spacescope: use the drawhelpers and add a draw-style property

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Like in wavescope support drawing dots and lines.
This commit is contained in:
Stefan Sauer 2011-11-23 11:21:15 +01:00
parent e3d1a50c0d
commit 3ba8b3c0ad
2 changed files with 144 additions and 10 deletions
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148
gst/audiovisualizers/gstspacescope.c
View file

@ -35,6 +35,7 @@
#include "config.h"
#endif
#include <stdlib.h>
#include "gstspacescope.h"
static GstStaticPadTemplate gst_space_scope_src_template =
@ -55,6 +56,47 @@ GST_STATIC_PAD_TEMPLATE ("sink",
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);
@ -80,10 +122,20 @@ gst_space_scope_base_init (gpointer g_class)
static void
gst_space_scope_class_init (GstSpaceScopeClass * g_class)
{
GObjectClass *gobject_class = (GObjectClass *) g_class;
GstBaseAudioVisualizerClass *scope_class =
(GstBaseAudioVisualizerClass *) g_class;
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
@ -92,19 +144,57 @@ gst_space_scope_init (GstSpaceScope * scope, GstSpaceScopeClass * g_class)
/* do nothing */
}
static gboolean
gst_space_scope_render (GstBaseAudioVisualizer * scope, GstBuffer * audio,
GstBuffer * video)
static void
gst_space_scope_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
guint32 *vdata = (guint32 *) GST_BUFFER_DATA (video);
gint16 *adata = (gint16 *) GST_BUFFER_DATA (audio);
guint i, s, x, y, off, ox, oy;
guint num_samples;
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 */
num_samples = GST_BUFFER_SIZE (audio) / (scope->channels * sizeof (gint16));
dx = scope->width / 65536.0;
ox = scope->width / 2;
dy = scope->height / 65536.0;
@ -113,9 +203,47 @@ gst_space_scope_render (GstBaseAudioVisualizer * scope, GstBuffer * audio,
for (i = 0; i < num_samples; i++) {
x = (guint) (ox + (gfloat) adata[s++] * dx);
y = (guint) (oy + (gfloat) adata[s++] * dy);
off = (y * w) + x;
vdata[off] = 0x00FFFFFF;
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;
gint x2, y2;
/* draw lines 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;
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 (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);
guint32 *vdata = (guint32 *) GST_BUFFER_DATA (video);
gint16 *adata = (gint16 *) GST_BUFFER_DATA (audio);
guint num_samples;
num_samples = GST_BUFFER_SIZE (audio) / (base->channels * sizeof (gint16));
scope->process (base, vdata, adata, num_samples);
return TRUE;
}

6
gst/audiovisualizers/gstspacescope.h
View file

@ -33,9 +33,15 @@ G_BEGIN_DECLS
typedef struct _GstSpaceScope GstSpaceScope;
typedef struct _GstSpaceScopeClass GstSpaceScopeClass;
typedef void (*GstSpaceScopeProcessFunc) (GstBaseAudioVisualizer *, guint32 *, gint16 *, guint);
struct _GstSpaceScope
{
GstBaseAudioVisualizer parent;
/* < private > */
GstSpaceScopeProcessFunc process;
gint style;
};
struct _GstSpaceScopeClass