mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-12-27 10:40:34 +00:00
314 lines
9.3 KiB
C
314 lines
9.3 KiB
C
/* GStreamer
|
|
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Library General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2 of the License, or (at your option) any later version.
|
|
*
|
|
* This library 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
|
|
* Library General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Library General Public
|
|
* License along with this library; if not, write to the
|
|
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
* Boston, MA 02111-1307, USA.
|
|
*/
|
|
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include "config.h"
|
|
#endif
|
|
#include <string.h>
|
|
|
|
#include "gstsmoothwave.h"
|
|
|
|
static GstElementDetails gst_smoothwave_details = GST_ELEMENT_DETAILS (
|
|
"Smooth waveform",
|
|
"Visualization",
|
|
"Fading grayscale waveform display",
|
|
"Erik Walthinsen <omega@cse.ogi.edu>"
|
|
);
|
|
|
|
|
|
/* SmoothWave signals and args */
|
|
enum {
|
|
/* FILL ME */
|
|
LAST_SIGNAL
|
|
};
|
|
|
|
enum {
|
|
ARG_0,
|
|
ARG_WIDTH,
|
|
ARG_HEIGHT,
|
|
ARG_WIDGET,
|
|
};
|
|
|
|
static void gst_smoothwave_base_init (gpointer g_class);
|
|
static void gst_smoothwave_class_init (GstSmoothWaveClass *klass);
|
|
static void gst_smoothwave_init (GstSmoothWave *smoothwave);
|
|
|
|
static void gst_smoothwave_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec);
|
|
static void gst_smoothwave_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec);
|
|
|
|
static void gst_smoothwave_chain (GstPad *pad, GstData *_data);
|
|
|
|
static GstElementClass *parent_class = NULL;
|
|
/*static guint gst_smoothwave_signals[LAST_SIGNAL] = { 0 }; */
|
|
|
|
|
|
GType
|
|
gst_smoothwave_get_type (void)
|
|
{
|
|
static GType smoothwave_type = 0;
|
|
|
|
if (!smoothwave_type) {
|
|
static const GTypeInfo smoothwave_info = {
|
|
sizeof(GstSmoothWaveClass),
|
|
gst_smoothwave_base_init,
|
|
NULL,
|
|
(GClassInitFunc)gst_smoothwave_class_init,
|
|
NULL,
|
|
NULL,
|
|
sizeof(GstSmoothWave),
|
|
0,
|
|
(GInstanceInitFunc)gst_smoothwave_init,
|
|
};
|
|
smoothwave_type = g_type_register_static(GST_TYPE_ELEMENT, "GstSmoothWave", &smoothwave_info, 0);
|
|
}
|
|
return smoothwave_type;
|
|
}
|
|
|
|
static void
|
|
gst_smoothwave_base_init (gpointer g_class)
|
|
{
|
|
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
|
|
|
|
gst_element_class_set_details (element_class, &gst_smoothwave_details);
|
|
}
|
|
|
|
static void
|
|
gst_smoothwave_class_init (GstSmoothWaveClass *klass)
|
|
{
|
|
GObjectClass *gobject_class;
|
|
GstElementClass *gstelement_class;
|
|
|
|
gobject_class = (GObjectClass*)klass;
|
|
gstelement_class = (GstElementClass*)klass;
|
|
|
|
parent_class = g_type_class_ref(GST_TYPE_ELEMENT);
|
|
|
|
g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_WIDTH,
|
|
g_param_spec_int("width","width","width",
|
|
G_MININT,G_MAXINT,0,G_PARAM_READWRITE)); /* CHECKME */
|
|
g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_HEIGHT,
|
|
g_param_spec_int("height","height","height",
|
|
G_MININT,G_MAXINT,0,G_PARAM_READWRITE)); /* CHECKME */
|
|
g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_WIDGET,
|
|
g_param_spec_object("widget","widget","widget",
|
|
GTK_TYPE_WIDGET,G_PARAM_READABLE)); /* CHECKME! */
|
|
|
|
gobject_class->set_property = gst_smoothwave_set_property;
|
|
gobject_class->get_property = gst_smoothwave_get_property;
|
|
}
|
|
|
|
static void
|
|
gst_smoothwave_init (GstSmoothWave *smoothwave)
|
|
{
|
|
int i;
|
|
guint32 palette[256];
|
|
|
|
smoothwave->sinkpad = gst_pad_new("sink",GST_PAD_SINK);
|
|
gst_element_add_pad(GST_ELEMENT(smoothwave),smoothwave->sinkpad);
|
|
gst_pad_set_chain_function(smoothwave->sinkpad,gst_smoothwave_chain);
|
|
smoothwave->srcpad = gst_pad_new("src",GST_PAD_SRC);
|
|
gst_element_add_pad(GST_ELEMENT(smoothwave),smoothwave->srcpad);
|
|
|
|
/* smoothwave->meta = NULL; */
|
|
smoothwave->width = 512;
|
|
smoothwave->height = 256;
|
|
|
|
gdk_rgb_init();
|
|
/* gtk_widget_set_default_colormap (gdk_rgb_get_cmap()); */
|
|
/* gtk_widget_set_default_visual (gdk_rgb_get_visual()); */
|
|
|
|
/* GST_DEBUG ("creating palette"); */
|
|
for (i=0;i<256;i++)
|
|
palette[i] = (i << 16) || (i << 8);
|
|
/* GST_DEBUG ("creating cmap"); */
|
|
smoothwave->cmap = gdk_rgb_cmap_new(palette,256);
|
|
/* GST_DEBUG ("created cmap"); */
|
|
/* gtk_widget_set_default_colormap (smoothwave->cmap); */
|
|
|
|
smoothwave->image = gtk_drawing_area_new();
|
|
gtk_drawing_area_size(GTK_DRAWING_AREA(smoothwave->image),
|
|
smoothwave->width,smoothwave->height);
|
|
gtk_widget_show(smoothwave->image);
|
|
|
|
smoothwave->imagebuffer = g_malloc(smoothwave->width*smoothwave->height);
|
|
memset(smoothwave->imagebuffer,0,smoothwave->width*smoothwave->height);
|
|
}
|
|
|
|
static void
|
|
gst_smoothwave_chain (GstPad *pad, GstData *_data)
|
|
{
|
|
GstBuffer *buf = GST_BUFFER (_data);
|
|
GstSmoothWave *smoothwave;
|
|
gint16 *samples;
|
|
gint samplecount,i;
|
|
register guint32 *ptr;
|
|
gint qheight;
|
|
|
|
g_return_if_fail(pad != NULL);
|
|
g_return_if_fail(GST_IS_PAD(pad));
|
|
g_return_if_fail(buf != NULL);
|
|
/* g_return_if_fail(GST_IS_BUFFER(buf)); */
|
|
|
|
smoothwave = GST_SMOOTHWAVE(GST_OBJECT_PARENT (pad));
|
|
|
|
/* first deal with audio metadata */
|
|
#if 0
|
|
if (buf->meta) {
|
|
if (smoothwave->meta != NULL) {
|
|
/* FIXME: need to unref the old metadata so it goes away */
|
|
}
|
|
/* we just make a copy of the pointer */
|
|
smoothwave->meta = (MetaAudioRaw *)(buf->meta);
|
|
/* FIXME: now we have to ref the metadata so it doesn't go away */
|
|
}
|
|
#endif
|
|
|
|
/* g_return_if_fail(smoothwave->meta != NULL); */
|
|
|
|
samples = (gint16 *)GST_BUFFER_DATA(buf);
|
|
/* samplecount = buf->datasize / (smoothwave->meta->channels * sizeof(gint16)); */
|
|
samplecount = GST_BUFFER_SIZE(buf) / (2 * sizeof(gint16));
|
|
|
|
qheight = smoothwave->height/4;
|
|
|
|
/* GST_DEBUG ("traversing %d",smoothwave->width); */
|
|
for (i=0;i<MAX(smoothwave->width,samplecount);i++) {
|
|
gint16 y1 = (gint32)(samples[i*2] * qheight) / 32768 +
|
|
qheight;
|
|
gint16 y2 = (gint32)(samples[(i*2)+1] * qheight) / 32768 +
|
|
(qheight*3);
|
|
smoothwave->imagebuffer[y1*smoothwave->width + i] = 0xff;
|
|
smoothwave->imagebuffer[y2*smoothwave->width + i] = 0xff;
|
|
/* smoothwave->imagebuffer[i+(smoothwave->width*5)] = i; */
|
|
}
|
|
|
|
ptr = (guint32 *)smoothwave->imagebuffer;
|
|
for (i=0;i<(smoothwave->width*smoothwave->height)/4;i++) {
|
|
if (*ptr){
|
|
*ptr -= ((*ptr & 0xf0f0f0f0ul) >> 4) + ((*ptr & 0xe0e0e0e0ul) >> 5);
|
|
ptr++;
|
|
}else{
|
|
ptr++;
|
|
}
|
|
}
|
|
|
|
/* GST_DEBUG ("drawing"); */
|
|
/* GST_DEBUG ("gdk_draw_indexed_image(%p,%p,%d,%d,%d,%d,%s,%p,%d,%p);",
|
|
smoothwave->image->window,
|
|
smoothwave->image->style->fg_gc[GTK_STATE_NORMAL],
|
|
0,0,smoothwave->width,smoothwave->height,
|
|
"GDK_RGB_DITHER_NORMAL",
|
|
smoothwave->imagebuffer,smoothwave->width,
|
|
smoothwave->cmap);*/
|
|
/* gdk_draw_indexed_image(smoothwave->image->window,
|
|
smoothwave->image->style->fg_gc[GTK_STATE_NORMAL],
|
|
0,0,smoothwave->width,smoothwave->height,
|
|
GDK_RGB_DITHER_NONE,
|
|
smoothwave->imagebuffer,smoothwave->width,
|
|
smoothwave->cmap);*/
|
|
gdk_draw_gray_image(smoothwave->image->window,
|
|
smoothwave->image->style->fg_gc[GTK_STATE_NORMAL],
|
|
0,0,smoothwave->width,smoothwave->height,
|
|
GDK_RGB_DITHER_NORMAL,
|
|
smoothwave->imagebuffer,smoothwave->width);
|
|
|
|
/* gst_trace_add_entry(NULL,0,buf,"smoothwave: calculated smoothwave"); */
|
|
|
|
gst_buffer_unref(buf);
|
|
}
|
|
|
|
static void
|
|
gst_smoothwave_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec)
|
|
{
|
|
GstSmoothWave *smoothwave;
|
|
|
|
/* it's not null if we got it, but it might not be ours */
|
|
g_return_if_fail(GST_IS_SMOOTHWAVE(object));
|
|
smoothwave = GST_SMOOTHWAVE(object);
|
|
|
|
switch (prop_id) {
|
|
case ARG_WIDTH:
|
|
smoothwave->width = g_value_get_int (value);
|
|
gtk_drawing_area_size(GTK_DRAWING_AREA(smoothwave->image),
|
|
smoothwave->width,smoothwave->height);
|
|
gtk_widget_set_usize(GTK_WIDGET(smoothwave->image),
|
|
smoothwave->width,smoothwave->height);
|
|
break;
|
|
case ARG_HEIGHT:
|
|
smoothwave->height = g_value_get_int (value);
|
|
gtk_drawing_area_size(GTK_DRAWING_AREA(smoothwave->image),
|
|
smoothwave->width,smoothwave->height);
|
|
gtk_widget_set_usize(GTK_WIDGET(smoothwave->image),
|
|
smoothwave->width,smoothwave->height);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void
|
|
gst_smoothwave_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec)
|
|
{
|
|
GstSmoothWave *smoothwave;
|
|
|
|
/* it's not null if we got it, but it might not be ours */
|
|
smoothwave = GST_SMOOTHWAVE(object);
|
|
|
|
switch (prop_id) {
|
|
case ARG_WIDTH: {
|
|
g_value_set_int (value, smoothwave->width);
|
|
break;
|
|
}
|
|
case ARG_HEIGHT: {
|
|
g_value_set_int (value, smoothwave->height);
|
|
break;
|
|
}
|
|
case ARG_WIDGET: {
|
|
g_value_set_object (value, smoothwave->image);
|
|
break;
|
|
}
|
|
default: {
|
|
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
|
|
static gboolean
|
|
plugin_init (GstPlugin *plugin)
|
|
{
|
|
if (!gst_element_register (plugin, "smoothwave", GST_RANK_NONE, GST_TYPE_SMOOTHWAVE))
|
|
return FALSE;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
GST_PLUGIN_DEFINE (
|
|
GST_VERSION_MAJOR,
|
|
GST_VERSION_MINOR,
|
|
"smoothwave",
|
|
"Fading greyscale waveform display",
|
|
plugin_init,
|
|
VERSION,
|
|
"LGPL",
|
|
GST_PACKAGE,
|
|
GST_ORIGIN)
|