mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-09-19 02:20:20 +00:00
49e707606a
Original commit message from CVS: * gst/filter/gstiir.c: Fix name tag.
253 lines
7.2 KiB
C
253 lines
7.2 KiB
C
/* -*- c-basic-offset: 2 -*-
|
|
*
|
|
* GStreamer
|
|
* Copyright (C) 1999-2001 Erik Walthinsen <omega@cse.ogi.edu>
|
|
* 2006 Dreamlab Technologies Ltd. <mathis.hofer@dreamlab.net>
|
|
*
|
|
* 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 <math.h>
|
|
#include <gst/gst.h>
|
|
#include <gst/base/gstbasetransform.h>
|
|
#include <gst/controller/gstcontroller.h>
|
|
|
|
#include "gstiir.h"
|
|
|
|
#define GST_CAT_DEFAULT gst_iir_debug
|
|
GST_DEBUG_CATEGORY_STATIC (GST_CAT_DEFAULT);
|
|
|
|
static const GstElementDetails iir_details =
|
|
GST_ELEMENT_DETAILS ("Infinite Impulse Response (IIR) filter",
|
|
"Filter/Effect/Audio",
|
|
"IIR filter based on vorbis code",
|
|
"Monty <monty@xiph.org>, "
|
|
"Thomas Vander Stichele <thomas at apestaart dot org>, "
|
|
"Dreamlab Technologies Ltd. <mathis.hofer@dreamlab.net>");
|
|
|
|
/* Filter signals and args */
|
|
enum
|
|
{
|
|
/* FILL ME */
|
|
LAST_SIGNAL
|
|
};
|
|
|
|
enum
|
|
{
|
|
PROP_0,
|
|
PROP_A,
|
|
PROP_B,
|
|
PROP_GAIN,
|
|
PROP_STAGES
|
|
};
|
|
|
|
static GstStaticPadTemplate iir_sink_template = GST_STATIC_PAD_TEMPLATE ("sink",
|
|
GST_PAD_SINK,
|
|
GST_PAD_ALWAYS,
|
|
GST_STATIC_CAPS ("audio/x-raw-float, "
|
|
"rate = (int) [ 1, MAX ], "
|
|
"channels = (int) [ 1, MAX ], "
|
|
"endianness = (int) BYTE_ORDER, " "width = (int) 32")
|
|
);
|
|
|
|
static GstStaticPadTemplate iir_src_template = GST_STATIC_PAD_TEMPLATE ("src",
|
|
GST_PAD_SRC,
|
|
GST_PAD_ALWAYS,
|
|
GST_STATIC_CAPS ("audio/x-raw-float, "
|
|
"rate = (int) [ 1, MAX ], "
|
|
"channels = (int) [ 1, MAX ], "
|
|
"endianness = (int) BYTE_ORDER, " "width = (int) 32")
|
|
);
|
|
|
|
#define DEBUG_INIT(bla) \
|
|
GST_DEBUG_CATEGORY_INIT (gst_iir_debug, "iir", 0, "Infinite Impulse Response (IIR) filter plugin");
|
|
|
|
GST_BOILERPLATE_FULL (GstIIR, gst_iir, GstBaseTransform,
|
|
GST_TYPE_BASE_TRANSFORM, DEBUG_INIT);
|
|
|
|
static void iir_set_property (GObject * object, guint prop_id,
|
|
const GValue * value, GParamSpec * pspec);
|
|
static void iir_get_property (GObject * object, guint prop_id,
|
|
GValue * value, GParamSpec * pspec);
|
|
|
|
static GstFlowReturn iir_transform_ip (GstBaseTransform * base,
|
|
GstBuffer * outbuf);
|
|
static gboolean iir_set_caps (GstBaseTransform * base, GstCaps * incaps,
|
|
GstCaps * outcaps);
|
|
|
|
/* Element class */
|
|
|
|
static void
|
|
gst_iir_dispose (GObject * object)
|
|
{
|
|
G_OBJECT_CLASS (parent_class)->dispose (object);
|
|
}
|
|
|
|
static void
|
|
gst_iir_base_init (gpointer g_class)
|
|
{
|
|
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
|
|
|
|
gst_element_class_add_pad_template (element_class,
|
|
gst_static_pad_template_get (&iir_src_template));
|
|
gst_element_class_add_pad_template (element_class,
|
|
gst_static_pad_template_get (&iir_sink_template));
|
|
gst_element_class_set_details (element_class, &iir_details);
|
|
}
|
|
|
|
static void
|
|
gst_iir_class_init (GstIIRClass * klass)
|
|
{
|
|
GObjectClass *gobject_class;
|
|
GstBaseTransformClass *trans_class;
|
|
|
|
gobject_class = (GObjectClass *) klass;
|
|
trans_class = (GstBaseTransformClass *) klass;
|
|
|
|
gobject_class->set_property = iir_set_property;
|
|
gobject_class->get_property = iir_get_property;
|
|
gobject_class->dispose = gst_iir_dispose;
|
|
|
|
g_object_class_install_property (gobject_class, PROP_A,
|
|
g_param_spec_double ("A", "A", "A filter coefficient",
|
|
-G_MAXDOUBLE, G_MAXDOUBLE, 0, G_PARAM_READWRITE));
|
|
g_object_class_install_property (gobject_class, PROP_B,
|
|
g_param_spec_double ("B", "B", "B filter coefficient",
|
|
-G_MAXDOUBLE, G_MAXDOUBLE, 0, G_PARAM_READWRITE));
|
|
g_object_class_install_property (gobject_class, PROP_GAIN,
|
|
g_param_spec_double ("gain", "Gain", "Filter gain",
|
|
-G_MAXDOUBLE, G_MAXDOUBLE, 0, G_PARAM_READWRITE));
|
|
g_object_class_install_property (gobject_class, PROP_STAGES,
|
|
g_param_spec_int ("stages", "Stages", "Number of filter stages",
|
|
1, G_MAXINT, 1, G_PARAM_READWRITE));
|
|
|
|
trans_class->transform_ip = GST_DEBUG_FUNCPTR (iir_transform_ip);
|
|
trans_class->set_caps = GST_DEBUG_FUNCPTR (iir_set_caps);
|
|
}
|
|
|
|
static void
|
|
gst_iir_init (GstIIR * this, GstIIRClass * g_class)
|
|
{
|
|
this->A = 0.0;
|
|
this->B = 0.0;
|
|
this->gain = 1.0; /* unity gain as default */
|
|
this->stages = 1;
|
|
this->state = NULL;
|
|
}
|
|
|
|
|
|
/* GstBaseTransform vmethod implementations */
|
|
|
|
/* get notified of caps and plug in the correct process function */
|
|
static gboolean
|
|
iir_set_caps (GstBaseTransform * base, GstCaps * incaps, GstCaps * outcaps)
|
|
{
|
|
GstIIR *this = GST_IIR (base);
|
|
|
|
GST_DEBUG_OBJECT (this,
|
|
"set_caps: in %" GST_PTR_FORMAT " out %" GST_PTR_FORMAT, incaps, outcaps);
|
|
|
|
/* FIXME: remember to free it */
|
|
this->state = (IIR_state *) g_malloc (sizeof (IIR_state));
|
|
IIR_init (this->state, this->stages, this->gain, &(this->A), &(this->B));
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static GstFlowReturn
|
|
iir_transform_ip (GstBaseTransform * base, GstBuffer * outbuf)
|
|
{
|
|
GstIIR *this = GST_IIR (base);
|
|
GstClockTime timestamp;
|
|
|
|
gfloat *src;
|
|
int i;
|
|
|
|
/* don't process data in passthrough-mode */
|
|
if (gst_base_transform_is_passthrough (base))
|
|
return GST_FLOW_OK;
|
|
|
|
/* FIXME: subdivide GST_BUFFER_SIZE into small chunks for smooth fades */
|
|
timestamp = GST_BUFFER_TIMESTAMP (outbuf);
|
|
|
|
if (GST_CLOCK_TIME_IS_VALID (timestamp))
|
|
gst_object_sync_values (G_OBJECT (this), timestamp);
|
|
|
|
src = (gfloat *) GST_BUFFER_DATA (outbuf);
|
|
|
|
/* do an in-place edit */
|
|
for (i = 0; i < GST_BUFFER_SIZE (outbuf) / sizeof (gfloat); ++i)
|
|
*(src + i) = (gfloat) IIR_filter (this->state, (double) *(src + i));
|
|
|
|
return GST_FLOW_OK;
|
|
}
|
|
|
|
static void
|
|
iir_set_property (GObject * object, guint prop_id, const GValue * value,
|
|
GParamSpec * pspec)
|
|
{
|
|
GstIIR *this = GST_IIR (object);
|
|
|
|
g_return_if_fail (GST_IS_IIR (this));
|
|
|
|
switch (prop_id) {
|
|
case PROP_A:
|
|
this->A = g_value_get_double (value);
|
|
break;
|
|
case PROP_B:
|
|
this->B = g_value_get_double (value);
|
|
break;
|
|
case PROP_GAIN:
|
|
this->gain = g_value_get_double (value);
|
|
break;
|
|
case PROP_STAGES:
|
|
this->stages = g_value_get_int (value);
|
|
break;
|
|
default:
|
|
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void
|
|
iir_get_property (GObject * object, guint prop_id, GValue * value,
|
|
GParamSpec * pspec)
|
|
{
|
|
GstIIR *this = GST_IIR (object);
|
|
|
|
switch (prop_id) {
|
|
case PROP_A:
|
|
g_value_set_double (value, this->A);
|
|
break;
|
|
case PROP_B:
|
|
g_value_set_double (value, this->B);
|
|
break;
|
|
case PROP_GAIN:
|
|
g_value_set_double (value, this->gain);
|
|
break;
|
|
case PROP_STAGES:
|
|
g_value_set_int (value, this->stages);
|
|
break;
|
|
default:
|
|
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
|
|
break;
|
|
}
|
|
}
|