mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-11-27 12:11:13 +00:00
Initial revision
Original commit message from CVS: Initial revision
This commit is contained in:
Andy Wingo
commit
9b6939b996
2 changed files with 294 additions and 0 deletions
226
gst/audiofx/gststereo.c
Normal file
226
gst/audiofx/gststereo.c
Normal file
|
|
@ -0,0 +1,226 @@
|
|||
/* Gnome-Streamer
|
||||
* 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.
|
||||
*/
|
||||
|
||||
#include <gststereo.h>
|
||||
|
||||
|
||||
static GstElementDetails stereo_details = {
|
||||
"Stereo effect",
|
||||
"Filter/Effect",
|
||||
"Muck with the stereo signal, enhance it's 'stereo-ness'",
|
||||
VERSION,
|
||||
"Erik Walthinsen <omega@cse.ogi.edu>",
|
||||
"(C) 1999",
|
||||
};
|
||||
|
||||
|
||||
/* Stereo signals and args */
|
||||
enum {
|
||||
/* FILL ME */
|
||||
LAST_SIGNAL
|
||||
};
|
||||
|
||||
enum {
|
||||
ARG_0,
|
||||
ARG_ACTIVE,
|
||||
ARG_STEREO
|
||||
};
|
||||
|
||||
|
||||
static void gst_stereo_class_init (GstStereoClass *klass);
|
||||
static void gst_stereo_init (GstStereo *stereo);
|
||||
|
||||
static void gst_stereo_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec);
|
||||
static void gst_stereo_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec);
|
||||
|
||||
static void gst_stereo_chain (GstPad *pad, GstBuffer *buf);
|
||||
|
||||
static GstElementClass *parent_class = NULL;
|
||||
//static guint gst_stereo_signals[LAST_SIGNAL] = { 0 };
|
||||
|
||||
GType
|
||||
gst_stereo_get_type(void) {
|
||||
static GType stereo_type = 0;
|
||||
|
||||
if (!stereo_type) {
|
||||
static const GTypeInfo stereo_info = {
|
||||
sizeof(GstStereoClass), NULL,
|
||||
NULL,
|
||||
(GClassInitFunc)gst_stereo_class_init,
|
||||
NULL,
|
||||
NULL,
|
||||
sizeof(GstStereo),
|
||||
0,
|
||||
(GInstanceInitFunc)gst_stereo_init,
|
||||
};
|
||||
stereo_type = g_type_register_static(GST_TYPE_ELEMENT, "GstStereo", &stereo_info, 0);
|
||||
}
|
||||
return stereo_type;
|
||||
}
|
||||
|
||||
static void
|
||||
gst_stereo_class_init (GstStereoClass *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_ACTIVE,
|
||||
g_param_spec_int("active","active","active",
|
||||
G_MININT,G_MAXINT,0,G_PARAM_READWRITE)); // CHECKME
|
||||
g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_STEREO,
|
||||
g_param_spec_float("stereo","stereo","stereo",
|
||||
0.0,1.0,0.0,G_PARAM_READWRITE)); // CHECKME
|
||||
|
||||
gobject_class->set_property = gst_stereo_set_property;
|
||||
gobject_class->get_property = gst_stereo_get_property;
|
||||
}
|
||||
|
||||
static void
|
||||
gst_stereo_init (GstStereo *stereo)
|
||||
{
|
||||
stereo->sinkpad = gst_pad_new("sink",GST_PAD_SINK);
|
||||
gst_element_add_pad(GST_ELEMENT(stereo),stereo->sinkpad);
|
||||
gst_pad_set_chain_function(stereo->sinkpad,gst_stereo_chain);
|
||||
stereo->srcpad = gst_pad_new("src",GST_PAD_SRC);
|
||||
gst_element_add_pad(GST_ELEMENT(stereo),stereo->srcpad);
|
||||
|
||||
stereo->active = FALSE;
|
||||
stereo->stereo = 2.5;
|
||||
}
|
||||
|
||||
static void
|
||||
gst_stereo_chain (GstPad *pad,GstBuffer *buf)
|
||||
{
|
||||
GstStereo *stereo;
|
||||
gint16 *data;
|
||||
gint samples;
|
||||
gint i;
|
||||
gdouble avg,ldiff,rdiff,tmp,mul;
|
||||
|
||||
g_return_if_fail(pad != NULL);
|
||||
g_return_if_fail(GST_IS_PAD(pad));
|
||||
g_return_if_fail(buf != NULL);
|
||||
|
||||
stereo = GST_STEREO(GST_OBJECT_PARENT (pad));
|
||||
g_return_if_fail(stereo != NULL);
|
||||
g_return_if_fail(GST_IS_STEREO(stereo));
|
||||
|
||||
// FIXME
|
||||
// if (buf->meta)
|
||||
// memcpy(&stereo->meta,buf->meta,sizeof(stereo->meta));
|
||||
|
||||
if (stereo->active) {
|
||||
|
||||
//if (stereo->meta.channels == 2 && stereo->meta.format == AFMT_S16_LE) {
|
||||
data = (gint16 *)GST_BUFFER_DATA(buf);
|
||||
samples = GST_BUFFER_SIZE(buf) / 2;
|
||||
mul = stereo->stereo;
|
||||
for (i = 0; i < samples / 2; i += 2) {
|
||||
avg = (data[i] + data[i + 1]) / 2;
|
||||
ldiff = data[i] - avg;
|
||||
rdiff = data[i + 1] - avg;
|
||||
|
||||
tmp = avg + ldiff * mul;
|
||||
if (tmp < -32768)
|
||||
tmp = -32768;
|
||||
if (tmp > 32767)
|
||||
tmp = 32767;
|
||||
data[i] = tmp;
|
||||
|
||||
tmp = avg + rdiff * mul;
|
||||
if (tmp < -32768)
|
||||
tmp = -32768;
|
||||
if (tmp > 32767)
|
||||
tmp = 32767;
|
||||
data[i + 1] = tmp;
|
||||
}
|
||||
//}
|
||||
}
|
||||
|
||||
gst_pad_push(stereo->srcpad,buf);
|
||||
}
|
||||
|
||||
static void
|
||||
gst_stereo_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec)
|
||||
{
|
||||
GstStereo *stereo;
|
||||
|
||||
/* it's not null if we got it, but it might not be ours */
|
||||
g_return_if_fail(GST_IS_STEREO(object));
|
||||
stereo = GST_STEREO(object);
|
||||
|
||||
switch (prop_id) {
|
||||
case ARG_ACTIVE:
|
||||
stereo->active = g_value_get_int (value);
|
||||
break;
|
||||
case ARG_STEREO:
|
||||
stereo->stereo = g_value_get_float (value) * 10.0;
|
||||
break;
|
||||
default:
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
static void
|
||||
gst_stereo_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec)
|
||||
{
|
||||
GstStereo *stereo;
|
||||
|
||||
/* it's not null if we got it, but it might not be ours */
|
||||
g_return_if_fail(GST_IS_STEREO(object));
|
||||
stereo = GST_STEREO(object);
|
||||
|
||||
switch (prop_id) {
|
||||
case ARG_ACTIVE:
|
||||
g_value_set_int (value, stereo->active);
|
||||
break;
|
||||
case ARG_STEREO:
|
||||
g_value_set_float (value, stereo->stereo / 10.0);
|
||||
break;
|
||||
default:
|
||||
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
static gboolean
|
||||
plugin_init (GModule *module, GstPlugin *plugin)
|
||||
{
|
||||
GstElementFactory *factory;
|
||||
|
||||
factory = gst_elementfactory_new("stereo",GST_TYPE_STEREO,
|
||||
&stereo_details);
|
||||
g_return_val_if_fail(factory != NULL, FALSE);
|
||||
gst_plugin_add_feature (plugin, GST_PLUGIN_FEATURE (factory));
|
||||
|
||||
return TRUE;
|
||||
}
|
||||
|
||||
GstPluginDesc plugin_desc = {
|
||||
GST_VERSION_MAJOR,
|
||||
GST_VERSION_MINOR,
|
||||
"stereo",
|
||||
plugin_init
|
||||
};
|
||||
|
||||
68
gst/audiofx/gststereo.h
Normal file
68
gst/audiofx/gststereo.h
Normal file
|
|
@ -0,0 +1,68 @@
|
|||
/* Gnome-Streamer
|
||||
* 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.
|
||||
*/
|
||||
|
||||
|
||||
#ifndef __GST_STEREO_H__
|
||||
#define __GST_STEREO_H__
|
||||
|
||||
|
||||
#include <config.h>
|
||||
#include <gst/gst.h>
|
||||
|
||||
|
||||
#ifdef __cplusplus
|
||||
extern "C" {
|
||||
#endif /* __cplusplus */
|
||||
|
||||
|
||||
#define GST_TYPE_STEREO \
|
||||
(gst_stereo_get_type())
|
||||
#define GST_STEREO(obj) \
|
||||
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_STEREO,GstStereo))
|
||||
#define GST_STEREO_CLASS(klass) \
|
||||
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_STEREO,GstStereo))
|
||||
#define GST_IS_STEREO(obj) \
|
||||
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_STEREO))
|
||||
#define GST_IS_STEREO_CLASS(obj) \
|
||||
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_STEREO))
|
||||
|
||||
typedef struct _GstStereo GstStereo;
|
||||
typedef struct _GstStereoClass GstStereoClass;
|
||||
|
||||
struct _GstStereo {
|
||||
GstElement element;
|
||||
|
||||
GstPad *sinkpad,*srcpad;
|
||||
|
||||
gint8 active;
|
||||
gfloat stereo;
|
||||
};
|
||||
|
||||
struct _GstStereoClass {
|
||||
GstElementClass parent_class;
|
||||
};
|
||||
|
||||
GType gst_stereo_get_type(void);
|
||||
|
||||
#ifdef __cplusplus
|
||||
}
|
||||
#endif /* __cplusplus */
|
||||
|
||||
|
||||
#endif /* __GST_STEREO_H__ */
|
||||
Loading…
Reference in a new issue