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-rw-r--r--gst/filter/gstiir.c292
1 files changed, 133 insertions, 159 deletions
diff --git a/gst/filter/gstiir.c b/gst/filter/gstiir.c
index bdebf4ba..45d217db 100644
--- a/gst/filter/gstiir.c
+++ b/gst/filter/gstiir.c
@@ -1,6 +1,8 @@
/* -*- 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
@@ -21,16 +23,27 @@
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
+
+#include <string.h>
+#include <math.h>
#include <gst/gst.h>
-#include "gstfilter.h"
-#include "iir.h"
+#include <gst/base/gstbasetransform.h>
+#include <gst/controller/gstcontroller.h>
+
+#include "gstiir.h"
-static const GstElementDetails gst_iir_details =
-GST_ELEMENT_DETAILS ("Infinite Impulse Response(IIR) filter",
+#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 <thomas@apestaart.org>");
+ "Monty <monty@xiph.org>, "
+ "Thomas <thomas@apestaart.org>, "
+ "Dreamlab Technologies Ltd. <mathis.hofer@dreamlab.net>");
+/* Filter signals and args */
enum
{
/* FILL ME */
@@ -39,80 +52,53 @@ enum
enum
{
- ARG_0,
- ARG_A,
- ARG_B,
- ARG_GAIN,
- ARG_STAGES
-};
-
-#define GST_TYPE_IIR \
- (gst_iir_get_type())
-#define GST_IIR(obj) \
- (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_IIR,GstIIR))
-#define GST_IIR_CLASS(klass) \
- (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_ULAW,GstIIR))
-#define GST_IS_IIR(obj) \
- (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_IIR))
-#define GST_IS_IIR_CLASS(obj) \
- (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_IIR))
-
-typedef struct _GstIIR GstIIR;
-typedef struct _GstIIRClass GstIIRClass;
-
-struct _GstIIR
-{
- GstElement element;
-
- GstPad *sinkpad, *srcpad;
-
- double A, B;
- double gain;
- int stages;
- IIR_state *state;
-};
-
-struct _GstIIRClass
-{
- GstElementClass parent_class;
+ PROP_0,
+ PROP_A,
+ PROP_B,
+ PROP_GAIN,
+ PROP_STAGES
};
-static void gst_iir_base_init (gpointer g_class);
-static void gst_iir_class_init (GstIIRClass * klass);
-static void gst_iir_init (GstIIR * filter);
-
-static void gst_iir_set_property (GObject * object, guint prop_id,
+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 gst_iir_get_property (GObject * object, guint prop_id,
+static void iir_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
-static void gst_iir_chain (GstPad * pad, GstData * _data);
-static GstPadLinkReturn
-gst_iir_sink_connect (GstPad * pad, const GstCaps * caps);
+static GstFlowReturn iir_transform_ip (GstBaseTransform * base,
+ GstBuffer * outbuf);
+static gboolean iir_set_caps (GstBaseTransform * base, GstCaps * incaps,
+ GstCaps * outcaps);
-static GstElementClass *parent_class = NULL;
+/* Element class */
-/*static guint gst_iir_signals[LAST_SIGNAL] = { 0 }; */
-
-GType
-gst_iir_get_type (void)
+static void
+gst_iir_dispose (GObject * object)
{
- static GType iir_type = 0;
-
- if (!iir_type) {
- static const GTypeInfo iir_info = {
- sizeof (GstIIRClass),
- gst_iir_base_init,
- NULL,
- (GClassInitFunc) gst_iir_class_init, NULL, NULL,
- sizeof (GstIIR), 0,
- (GInstanceInitFunc) gst_iir_init,
- };
-
- iir_type = g_type_register_static (GST_TYPE_ELEMENT, "GstIIR",
- &iir_info, 0);
- }
- return iir_type;
+ G_OBJECT_CLASS (parent_class)->dispose (object);
}
static void
@@ -120,157 +106,145 @@ gst_iir_base_init (gpointer g_class)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
- /* register src pads */
gst_element_class_add_pad_template (element_class,
- gst_static_pad_template_get (&gst_filter_src_template));
+ gst_static_pad_template_get (&iir_src_template));
gst_element_class_add_pad_template (element_class,
- gst_static_pad_template_get (&gst_filter_sink_template));
-
- gst_element_class_set_details (element_class, &gst_iir_details);
+ 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;
- GstElementClass *gstelement_class;
+ GstBaseTransformClass *trans_class;
gobject_class = (GObjectClass *) klass;
- gstelement_class = (GstElementClass *) klass;
+ trans_class = (GstBaseTransformClass *) klass;
- parent_class = g_type_class_peek_parent (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 (G_OBJECT_CLASS (klass), ARG_A,
+ 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 (G_OBJECT_CLASS (klass), ARG_B,
+ 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 (G_OBJECT_CLASS (klass), ARG_GAIN,
+ 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 (G_OBJECT_CLASS (klass), ARG_STAGES,
+ 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));
- gobject_class->set_property = gst_iir_set_property;
- gobject_class->get_property = gst_iir_get_property;
+ 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 * filter)
+gst_iir_init (GstIIR * this, GstIIRClass * g_class)
{
- filter->sinkpad =
- gst_pad_new_from_template (gst_static_pad_template_get
- (&gst_filter_sink_template), "sink");
- gst_pad_set_chain_function (filter->sinkpad, gst_iir_chain);
- gst_pad_set_link_function (filter->sinkpad, gst_iir_sink_connect);
- gst_element_add_pad (GST_ELEMENT (filter), filter->sinkpad);
-
- filter->srcpad =
- gst_pad_new_from_template (gst_static_pad_template_get
- (&gst_filter_src_template), "src");
- gst_element_add_pad (GST_ELEMENT (filter), filter->srcpad);
-
- filter->A = 0.0;
- filter->B = 0.0;
- filter->gain = 1.0; /* unity gain as default */
- filter->stages = 1;
- filter->state = NULL;
+ this->A = 0.0;
+ this->B = 0.0;
+ this->gain = 1.0; /* unity gain as default */
+ this->stages = 1;
+ this->state = NULL;
}
-static GstPadLinkReturn
-gst_iir_sink_connect (GstPad * pad, const GstCaps * caps)
+
+/* 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 *filter;
- GstPadLinkReturn set_retval;
-
- filter = GST_IIR (gst_pad_get_parent (pad));
-
- set_retval = gst_pad_try_set_caps (filter->srcpad, caps);
- if (set_retval > 0) {
- /* connection works, so init the filter */
- /* FIXME: remember to free it */
- filter->state = (IIR_state *) g_malloc (sizeof (IIR_state));
- IIR_init (filter->state, filter->stages,
- filter->gain, &(filter->A), &(filter->B));
- }
+ GstIIR *this = GST_IIR (base);
+
+ GST_DEBUG_OBJECT (this,
+ "set_caps: in %" GST_PTR_FORMAT " out %" GST_PTR_FORMAT, incaps, outcaps);
- return set_retval;
+ /* 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 void
-gst_iir_chain (GstPad * pad, GstData * _data)
+static GstFlowReturn
+iir_transform_ip (GstBaseTransform * base, GstBuffer * outbuf)
{
- GstBuffer *buf = GST_BUFFER (_data);
- GstIIR *filter;
- gfloat *src;
- int i;
+ GstIIR *this = GST_IIR (base);
+ GstClockTime timestamp;
- filter = GST_IIR (gst_pad_get_parent (pad));
+ /* don't process data in passthrough-mode */
+ if (gst_base_transform_is_passthrough (base))
+ return GST_FLOW_OK;
- src = (gfloat *) GST_BUFFER_DATA (buf);
+ /* FIXME: subdivide GST_BUFFER_SIZE into small chunks for smooth fades */
+ timestamp = GST_BUFFER_TIMESTAMP (outbuf);
- /* get a writable buffer */
- buf = gst_buffer_copy_on_write (buf);
+ if (GST_CLOCK_TIME_IS_VALID (timestamp))
+ gst_object_sync_values (G_OBJECT (this), timestamp);
+
+ gfloat *src;
+ int i;
+
+ src = (gfloat *) GST_BUFFER_DATA (outbuf);
/* do an in-place edit */
- for (i = 0; i < GST_BUFFER_SIZE (buf) / sizeof (gfloat); ++i)
- *(src + i) = (gfloat) IIR_filter (filter->state, (double) *(src + i));
+ for (i = 0; i < GST_BUFFER_SIZE (outbuf) / sizeof (gfloat); ++i)
+ *(src + i) = (gfloat) IIR_filter (this->state, (double) *(src + i));
- gst_pad_push (filter->srcpad, GST_DATA (buf));
+ return GST_FLOW_OK;
}
static void
-gst_iir_set_property (GObject * object, guint prop_id, const GValue * value,
+iir_set_property (GObject * object, guint prop_id, const GValue * value,
GParamSpec * pspec)
{
- GstIIR *filter;
+ GstIIR *this = GST_IIR (object);
- g_return_if_fail (GST_IS_IIR (object));
-
- filter = GST_IIR (object);
+ g_return_if_fail (GST_IS_IIR (this));
switch (prop_id) {
- case ARG_A:
- filter->A = g_value_get_double (value);
+ case PROP_A:
+ this->A = g_value_get_double (value);
break;
- case ARG_B:
- filter->B = g_value_get_double (value);
+ case PROP_B:
+ this->B = g_value_get_double (value);
break;
- case ARG_GAIN:
- filter->gain = g_value_get_double (value);
+ case PROP_GAIN:
+ this->gain = g_value_get_double (value);
break;
- case ARG_STAGES:
- filter->stages = g_value_get_int (value);
+ 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
-gst_iir_get_property (GObject * object, guint prop_id, GValue * value,
+iir_get_property (GObject * object, guint prop_id, GValue * value,
GParamSpec * pspec)
{
- GstIIR *filter;
-
- g_return_if_fail (GST_IS_IIR (object));
-
- filter = GST_IIR (object);
+ GstIIR *this = GST_IIR (object);
switch (prop_id) {
- case ARG_A:
- g_value_set_double (value, filter->A);
+ case PROP_A:
+ g_value_set_double (value, this->A);
break;
- case ARG_B:
- g_value_set_double (value, filter->B);
+ case PROP_B:
+ g_value_set_double (value, this->B);
break;
- case ARG_GAIN:
- g_value_set_double (value, filter->gain);
+ case PROP_GAIN:
+ g_value_set_double (value, this->gain);
break;
- case ARG_STAGES:
- g_value_set_int (value, filter->stages);
+ case PROP_STAGES:
+ g_value_set_int (value, this->stages);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
generated by cgit v1.2.1 (git 2.18.0) at 2024-07-03 05:09:48 +0000