gstreamer/gst/audiovisualizers/gstwavescope.c
Luis de Bethencourt c01af3aa8f audiovisualizer: remove check for below zero for unsigned value
CLAMP checks both if value is '< 0' and '> max'. Value will never be a negative
number since it is an unsigned integer. Removing that check and only checking if
it is bigger than max and setting it appropriately.

Also converting the previous instance of this into MIN() for consistency.

CID 1139793
2015-01-09 17:56:09 +00:00

431 lines
12 KiB
C

/* GStreamer
* Copyright (C) <2011> Stefan Kost <ensonic@users.sf.net>
*
* gstwavescope.c: simple oscilloscope
*
* 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
*/
/**
* SECTION:element-wavescope
* @see_also: goom
*
* Wavescope is a simple audio visualisation element. It renders the waveforms
* like on an oscilloscope.
*
* <refsect2>
* <title>Example launch line</title>
* |[
* gst-launch audiotestsrc ! audioconvert ! wavescope ! ximagesink
* ]|
* </refsect2>
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdlib.h>
#include "gstwavescope.h"
static GstStaticPadTemplate gst_wave_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_wave_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 (wave_scope_debug);
#define GST_CAT_DEFAULT wave_scope_debug
enum
{
PROP_0,
PROP_STYLE
};
enum
{
STYLE_DOTS = 0,
STYLE_LINES,
STYLE_COLOR_DOTS,
STYLE_COLOR_LINES,
NUM_STYLES
};
#define GST_TYPE_WAVE_SCOPE_STYLE (gst_wave_scope_style_get_type ())
static GType
gst_wave_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 ("GstWaveScopeStyle", values);
}
return gtype;
}
static void gst_wave_scope_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_wave_scope_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static void gst_wave_scope_finalize (GObject * object);
static void render_dots (GstAudioVisualizer * scope, guint32 * vdata,
gint16 * adata, guint num_samples);
static void render_lines (GstAudioVisualizer * scope, 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_wave_scope_setup (GstAudioVisualizer * scope);
static gboolean gst_wave_scope_render (GstAudioVisualizer * base,
GstBuffer * audio, GstVideoFrame * video);
#define gst_wave_scope_parent_class parent_class
G_DEFINE_TYPE (GstWaveScope, gst_wave_scope, GST_TYPE_AUDIO_VISUALIZER);
static void
gst_wave_scope_class_init (GstWaveScopeClass * g_class)
{
GObjectClass *gobject_class = (GObjectClass *) g_class;
GstElementClass *gstelement_class = (GstElementClass *) g_class;
GstAudioVisualizerClass *scope_class = (GstAudioVisualizerClass *) g_class;
gobject_class->set_property = gst_wave_scope_set_property;
gobject_class->get_property = gst_wave_scope_get_property;
gobject_class->finalize = gst_wave_scope_finalize;
scope_class->setup = GST_DEBUG_FUNCPTR (gst_wave_scope_setup);
scope_class->render = GST_DEBUG_FUNCPTR (gst_wave_scope_render);
g_object_class_install_property (gobject_class, PROP_STYLE,
g_param_spec_enum ("style", "drawing style",
"Drawing styles for the wave form display.",
GST_TYPE_WAVE_SCOPE_STYLE, STYLE_DOTS,
G_PARAM_CONSTRUCT | G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
gst_element_class_set_static_metadata (gstelement_class,
"Waveform oscilloscope", "Visualization", "Simple waveform oscilloscope",
"Stefan Kost <ensonic@users.sf.net>");
gst_element_class_add_pad_template (gstelement_class,
gst_static_pad_template_get (&gst_wave_scope_src_template));
gst_element_class_add_pad_template (gstelement_class,
gst_static_pad_template_get (&gst_wave_scope_sink_template));
scope_class->render = GST_DEBUG_FUNCPTR (gst_wave_scope_render);
}
static void
gst_wave_scope_init (GstWaveScope * scope)
{
/* do nothing */
}
static void
gst_wave_scope_finalize (GObject * object)
{
GstWaveScope *scope = GST_WAVE_SCOPE (object);
if (scope->flt) {
g_free (scope->flt);
scope->flt = NULL;
}
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static gboolean
gst_wave_scope_setup (GstAudioVisualizer * bscope)
{
GstWaveScope *scope = GST_WAVE_SCOPE (bscope);
if (scope->flt)
g_free (scope->flt);
scope->flt = g_new0 (gdouble, 6 * GST_AUDIO_INFO_CHANNELS (&bscope->ainfo));
return TRUE;
}
static void
gst_wave_scope_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstWaveScope *scope = GST_WAVE_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_wave_scope_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstWaveScope *scope = GST_WAVE_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)
{
gint channels = GST_AUDIO_INFO_CHANNELS (&base->ainfo);
guint i, c, s, x, y, oy;
gfloat dx, dy;
guint w = GST_VIDEO_INFO_WIDTH (&base->vinfo);
guint h = GST_VIDEO_INFO_HEIGHT (&base->vinfo);
/* draw dots */
dx = (gfloat) w / (gfloat) num_samples;
dy = h / 65536.0;
oy = h / 2;
for (c = 0; c < channels; c++) {
s = c;
for (i = 0; i < num_samples; i++) {
x = (guint) ((gfloat) i * dx);
y = (guint) (oy + (gfloat) adata[s] * dy);
s += channels;
draw_dot (vdata, x, y, w, 0x00FFFFFF);
}
}
}
static void
render_lines (GstAudioVisualizer * base, guint32 * vdata, gint16 * adata,
guint num_samples)
{
gint channels = GST_AUDIO_INFO_CHANNELS (&base->ainfo);
guint i, c, s, x, y, oy;
gfloat dx, dy;
guint w = GST_VIDEO_INFO_WIDTH (&base->vinfo);
guint h = GST_VIDEO_INFO_HEIGHT (&base->vinfo);
gint x2, y2;
/* draw lines */
dx = (gfloat) (w - 1) / (gfloat) num_samples;
dy = (h - 1) / 65536.0;
oy = (h - 1) / 2;
for (c = 0; c < channels; c++) {
s = c;
x2 = 0;
y2 = (guint) (oy + (gfloat) adata[s] * dy);
for (i = 1; i < num_samples; i++) {
x = (guint) ((gfloat) i * dx);
y = (guint) (oy + (gfloat) adata[s] * dy);
s += channels;
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(in) G_STMT_START { \
flt[2] = in - (flt[1] * RESONANCE) - flt[0]; \
flt[1] += (flt[2] * CUTOFF_1); \
flt[0] += (flt[1] * CUTOFF_1); \
\
flt[5] = (flt[1] + flt[2]) - (flt[4] * RESONANCE) - flt[3]; \
flt[4] += (flt[5] * CUTOFF_2); \
flt[3] += (flt[4] * CUTOFF_2); \
} G_STMT_END
static void
render_color_dots (GstAudioVisualizer * base, guint32 * vdata,
gint16 * adata, guint num_samples)
{
GstWaveScope *scope = (GstWaveScope *) base;
gint channels = GST_AUDIO_INFO_CHANNELS (&base->ainfo);
guint i, c, s, x, y, oy;
gfloat dx, dy;
guint w = GST_VIDEO_INFO_WIDTH (&base->vinfo);
guint h = GST_VIDEO_INFO_HEIGHT (&base->vinfo), h1 = h - 2;
gdouble *flt = scope->flt;
/* draw dots */
dx = (gfloat) w / (gfloat) num_samples;
dy = h / 65536.0;
oy = h / 2;
for (c = 0; c < channels; c++) {
s = c;
for (i = 0; i < num_samples; i++) {
x = (guint) ((gfloat) i * dx);
filter ((gfloat) adata[s]);
y = (guint) (oy + flt[0] * dy);
y = MIN (y, h1);
draw_dot_c (vdata, x, y, w, 0x00FF0000);
y = (guint) (oy + flt[3] * dy);
y = MIN (y, h1);
draw_dot_c (vdata, x, y, w, 0x0000FF00);
y = (guint) (oy + (flt[4] + flt[5]) * dy);
y = MIN (y, h1);
draw_dot_c (vdata, x, y, w, 0x000000FF);
s += channels;
}
flt += 6;
}
}
static void
render_color_lines (GstAudioVisualizer * base, guint32 * vdata,
gint16 * adata, guint num_samples)
{
GstWaveScope *scope = (GstWaveScope *) base;
gint channels = GST_AUDIO_INFO_CHANNELS (&base->ainfo);
guint i, c, s, x, y, oy;
gfloat dx, dy;
guint w = GST_VIDEO_INFO_WIDTH (&base->vinfo);
guint h = GST_VIDEO_INFO_HEIGHT (&base->vinfo), h1 = h - 2;
gdouble *flt = scope->flt;
gint x2, y2, y3, y4;
/* draw lines */
dx = (gfloat) (w - 1) / (gfloat) num_samples;
dy = (h - 1) / 65536.0;
oy = (h - 1) / 2;
for (c = 0; c < channels; c++) {
s = c;
/* do first pixels */
x2 = 0;
filter ((gfloat) adata[s]);
y = (guint) (oy + flt[0] * dy);
y2 = MIN (y, h1);
y = (guint) (oy + flt[3] * dy);
y3 = MIN (y, h1);
y = (guint) (oy + (flt[4] + flt[5]) * dy);
y4 = MIN (y, h1);
for (i = 1; i < num_samples; i++) {
x = (guint) ((gfloat) i * dx);
filter ((gfloat) adata[s]);
y = (guint) (oy + flt[0] * dy);
y = MIN (y, h1);
draw_line_aa (vdata, x2, x, y2, y, w, 0x00FF0000);
y2 = y;
y = (guint) (oy + flt[3] * dy);
y = MIN (y, h1);
draw_line_aa (vdata, x2, x, y3, y, w, 0x0000FF00);
y3 = y;
y = (guint) (oy + (flt[4] + flt[5]) * dy);
y = MIN (y, h1);
draw_line_aa (vdata, x2, x, y4, y, w, 0x000000FF);
y4 = y;
x2 = x;
s += channels;
}
flt += 6;
}
}
static gboolean
gst_wave_scope_render (GstAudioVisualizer * base, GstBuffer * audio,
GstVideoFrame * video)
{
GstWaveScope *scope = GST_WAVE_SCOPE (base);
GstMapInfo amap;
guint num_samples;
gint channels = GST_AUDIO_INFO_CHANNELS (&base->ainfo);
gst_buffer_map (audio, &amap, GST_MAP_READ);
num_samples = amap.size / (channels * sizeof (gint16));
scope->process (base, (guint32 *) GST_VIDEO_FRAME_PLANE_DATA (video, 0),
(gint16 *) amap.data, num_samples);
gst_buffer_unmap (audio, &amap);
return TRUE;
}
gboolean
gst_wave_scope_plugin_init (GstPlugin * plugin)
{
GST_DEBUG_CATEGORY_INIT (wave_scope_debug, "wavescope", 0, "wavescope");
return gst_element_register (plugin, "wavescope", GST_RANK_NONE,
GST_TYPE_WAVE_SCOPE);
}