/* -*- 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 along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
- */
-
-/* this windowed sinc filter is taken from the freely downloadable DSP book,
+ *
+ *
+ * this windowed sinc filter is taken from the freely downloadable DSP book,
* "The Scientist and Engineer's Guide to Digital Signal Processing",
* chapter 16
* available at http://www.dspguide.com/
- */
-
-/* FIXME:
+ *
+ * FIXME:
* - this filter is totally unoptimized !
* - we do not destroy the allocated memory for filters and residue
* - this might be improved upon with bytestream
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
+
+#include <string.h>
+#include <math.h>
#include <gst/gst.h>
-#include "gstfilter.h"
-#include <math.h> /* M_PI */
-#include <string.h> /* memmove */
+#include <gst/base/gstbasetransform.h>
+#include <gst/controller/gstcontroller.h>
-/* elementfactory information */
-static const GstElementDetails gst_bpwsinc_details =
-GST_ELEMENT_DETAILS ("BPWSinc",
+#include "gstbpwsinc.h"
+
+#define GST_CAT_DEFAULT gst_bpwsinc_debug
+GST_DEBUG_CATEGORY_STATIC (GST_CAT_DEFAULT);
+
+static const GstElementDetails bpwsinc_details =
+GST_ELEMENT_DETAILS ("Band-pass Windowed sinc filter",
"Filter/Effect/Audio",
- "Band-Pass Windowed sinc filter",
- "Thomas <thomas@apestaart.org>, " "Steven W. Smith");
+ "Band-pass Windowed sinc filter",
+ "Thomas <thomas@apestaart.org>, "
+ "Steven W. Smith, "
+ "Dreamlab Technologies Ltd. <mathis.hofer@dreamlab.net>");
+/* Filter signals and args */
enum
{
/* FILL ME */
enum
{
- ARG_0,
- ARG_LENGTH,
- ARG_LOWER_FREQUENCY,
- ARG_UPPER_FREQUENCY
-};
-
-#define GST_TYPE_BPWSINC \
- (gst_bpwsinc_get_type())
-#define GST_BPWSINC(obj) \
- (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_BPWSINC,GstBPWSinc))
-#define GST_BPWSINC_CLASS(klass) \
- (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_ULAW,GstBPWSinc))
-#define GST_IS_BPWSINC(obj) \
- (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_BPWSINC))
-#define GST_IS_BPWSINC_CLASS(obj) \
- (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_BPWSINC))
-
-typedef struct _GstBPWSinc GstBPWSinc;
-typedef struct _GstBPWSincClass GstBPWSincClass;
-
-struct _GstBPWSinc
-{
- GstElement element;
-
- GstPad *sinkpad, *srcpad;
-
- double frequency;
- double lower_frequency, upper_frequency;
- int wing_size; /* length of a "wing" of the filter;
- actual length is 2 * wing_size + 1 */
-
- gfloat *residue; /* buffer for left-over samples from previous buffer */
- double *kernel;
-};
-
-struct _GstBPWSincClass
-{
- GstElementClass parent_class;
+ PROP_0,
+ PROP_LENGTH,
+ PROP_LOWER_FREQUENCY,
+ PROP_UPPER_FREQUENCY
};
-static void gst_bpwsinc_base_init (gpointer g_class);
-static void gst_bpwsinc_class_init (GstBPWSincClass * klass);
-static void gst_bpwsinc_init (GstBPWSinc * filter);
-
-static void gst_bpwsinc_set_property (GObject * object, guint prop_id,
+static GstStaticPadTemplate bpwsinc_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 bpwsinc_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_bpwsinc_debug, "bpwsinc", 0, "Band-pass Windowed sinc filter plugin");
+
+GST_BOILERPLATE_FULL (GstBPWSinc, gst_bpwsinc, GstBaseTransform,
+ GST_TYPE_BASE_TRANSFORM, DEBUG_INIT);
+
+static void bpwsinc_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
-static void gst_bpwsinc_get_property (GObject * object, guint prop_id,
+static void bpwsinc_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
-static void gst_bpwsinc_chain (GstPad * pad, GstData * _data);
-static GstPadLinkReturn
-gst_bpwsinc_sink_connect (GstPad * pad, const GstCaps * caps);
-
-static GstElementClass *parent_class = NULL;
+static GstFlowReturn bpwsinc_transform_ip (GstBaseTransform * base,
+ GstBuffer * outbuf);
+static gboolean bpwsinc_set_caps (GstBaseTransform * base, GstCaps * incaps,
+ GstCaps * outcaps);
-/*static guint gst_bpwsinc_signals[LAST_SIGNAL] = { 0 }; */
+/* Element class */
-GType
-gst_bpwsinc_get_type (void)
+static void
+gst_bpwsinc_dispose (GObject * object)
{
- static GType bpwsinc_type = 0;
-
- if (!bpwsinc_type) {
- static const GTypeInfo bpwsinc_info = {
- sizeof (GstBPWSincClass),
- gst_bpwsinc_base_init,
- NULL,
- (GClassInitFunc) gst_bpwsinc_class_init, NULL, NULL,
- sizeof (GstBPWSinc), 0,
- (GInstanceInitFunc) gst_bpwsinc_init,
- };
-
- bpwsinc_type = g_type_register_static (GST_TYPE_ELEMENT, "GstBPWSinc",
- &bpwsinc_info, 0);
- }
- return bpwsinc_type;
+ G_OBJECT_CLASS (parent_class)->dispose (object);
}
static void
{
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 (&bpwsinc_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_bpwsinc_details);
+ gst_static_pad_template_get (&bpwsinc_sink_template));
+ gst_element_class_set_details (element_class, &bpwsinc_details);
}
static void
gst_bpwsinc_class_init (GstBPWSincClass * 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 = bpwsinc_set_property;
+ gobject_class->get_property = bpwsinc_get_property;
+ gobject_class->dispose = gst_bpwsinc_dispose;
- g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_LOWER_FREQUENCY,
+ g_object_class_install_property (gobject_class, PROP_LOWER_FREQUENCY,
g_param_spec_double ("lower-frequency", "Lower Frequency",
"Cut-off lower frequency (relative to sample rate)",
0.0, 0.5, 0, G_PARAM_READWRITE));
- g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_UPPER_FREQUENCY,
+ g_object_class_install_property (gobject_class, PROP_UPPER_FREQUENCY,
g_param_spec_double ("upper-frequency", "Upper Frequency",
"Cut-off upper frequency (relative to sample rate)",
0.0, 0.5, 0, G_PARAM_READWRITE));
- g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_LENGTH,
+ g_object_class_install_property (gobject_class, PROP_LENGTH,
g_param_spec_int ("length", "Length",
"N such that the filter length = 2N + 1",
1, G_MAXINT, 1, G_PARAM_READWRITE));
- gobject_class->set_property = gst_bpwsinc_set_property;
- gobject_class->get_property = gst_bpwsinc_get_property;
+ trans_class->transform_ip = GST_DEBUG_FUNCPTR (bpwsinc_transform_ip);
+ trans_class->set_caps = GST_DEBUG_FUNCPTR (bpwsinc_set_caps);
}
static void
-gst_bpwsinc_init (GstBPWSinc * filter)
+gst_bpwsinc_init (GstBPWSinc * this, GstBPWSincClass * 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_bpwsinc_chain);
- gst_pad_set_link_function (filter->sinkpad, gst_bpwsinc_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->wing_size = 50;
- filter->lower_frequency = 0.25;
- filter->upper_frequency = 0.3;
- filter->kernel = NULL;
+ this->wing_size = 50;
+ this->lower_frequency = 0.25;
+ this->upper_frequency = 0.3;
+ this->kernel = NULL;
}
-static GstPadLinkReturn
-gst_bpwsinc_sink_connect (GstPad * pad, const GstCaps * caps)
+
+/* GstBaseTransform vmethod implementations */
+
+/* get notified of caps and plug in the correct process function */
+static gboolean
+bpwsinc_set_caps (GstBaseTransform * base, GstCaps * incaps, GstCaps * outcaps)
{
int i = 0;
double sum = 0.0;
int len = 0;
double *kernel_lp, *kernel_hp;
- GstPadLinkReturn set_retval;
-
- GstBPWSinc *filter = GST_BPWSINC (gst_pad_get_parent (pad));
-
- g_assert (GST_IS_PAD (pad));
- g_assert (caps != NULL);
-
- set_retval = gst_pad_try_set_caps (filter->srcpad, caps);
-
- if (set_retval > 0) {
- len = filter->wing_size;
- /* fill the lp kernel */
- GST_DEBUG ("bpwsinc: initializing LP kernel of length %d with cut-off %f",
- len * 2 + 1, filter->lower_frequency);
- kernel_lp = (double *) g_malloc (sizeof (double) * (2 * len + 1));
- for (i = 0; i <= len * 2; ++i) {
- if (i == len)
- kernel_lp[i] = 2 * M_PI * filter->lower_frequency;
- else
- kernel_lp[i] = sin (2 * M_PI * filter->lower_frequency * (i - len))
- / (i - len);
- /* Blackman windowing */
- kernel_lp[i] *= (0.42 - 0.5 * cos (M_PI * i / len)
- + 0.08 * cos (2 * M_PI * i / len));
- }
-
- /* normalize for unity gain at DC
- * FIXME: sure this is not supposed to be quadratic ? */
- sum = 0.0;
- for (i = 0; i <= len * 2; ++i)
- sum += kernel_lp[i];
- for (i = 0; i <= len * 2; ++i)
- kernel_lp[i] /= sum;
-
- /* fill the hp kernel */
- GST_DEBUG ("bpwsinc: initializing HP kernel of length %d with cut-off %f",
- len * 2 + 1, filter->upper_frequency);
- kernel_hp = (double *) g_malloc (sizeof (double) * (2 * len + 1));
- for (i = 0; i <= len * 2; ++i) {
- if (i == len)
- kernel_hp[i] = 2 * M_PI * filter->upper_frequency;
- else
- kernel_hp[i] = sin (2 * M_PI * filter->upper_frequency * (i - len))
- / (i - len);
- /* Blackman windowing */
- kernel_hp[i] *= (0.42 - 0.5 * cos (M_PI * i / len)
- + 0.08 * cos (2 * M_PI * i / len));
- }
-
- /* normalize for unity gain at DC
- * FIXME: sure this is not supposed to be quadratic ? */
- sum = 0.0;
- for (i = 0; i <= len * 2; ++i)
- sum += kernel_hp[i];
- for (i = 0; i <= len * 2; ++i)
- kernel_hp[i] /= sum;
-
- /* do spectral inversion to get a HP filter */
- for (i = 0; i <= len * 2; ++i)
- kernel_hp[i] = -kernel_hp[i];
- kernel_hp[len] += 1;
-
- /* combine the two filters */
-
- filter->kernel = (double *) g_malloc (sizeof (double) * (2 * len + 1));
-
- for (i = 0; i <= len * 2; ++i)
- filter->kernel[i] = kernel_lp[i] + kernel_hp[i];
-
- /* do spectral inversion to go from band reject to bandpass */
- for (i = 0; i <= len * 2; ++i)
- filter->kernel[i] = -filter->kernel[i];
- filter->kernel[len] += 1;
-
- /* free the helper kernels */
- g_free (kernel_lp);
- g_free (kernel_hp);
-
- /* set up the residue memory space */
- filter->residue = (gfloat *) g_malloc (sizeof (gfloat) * (len * 2 + 1));
- for (i = 0; i <= len * 2; ++i)
- filter->residue[i] = 0.0;
+ GstBPWSinc *this = GST_BPWSINC (base);
+
+ GST_DEBUG_OBJECT (this,
+ "set_caps: in %" GST_PTR_FORMAT " out %" GST_PTR_FORMAT, incaps, outcaps);
+
+ len = this->wing_size;
+ /* fill the lp kernel */
+ GST_DEBUG ("bpwsinc: initializing LP kernel of length %d with cut-off %f",
+ len * 2 + 1, this->lower_frequency);
+ kernel_lp = (double *) g_malloc (sizeof (double) * (2 * len + 1));
+ for (i = 0; i <= len * 2; ++i) {
+ if (i == len)
+ kernel_lp[i] = 2 * M_PI * this->lower_frequency;
+ else
+ kernel_lp[i] = sin (2 * M_PI * this->lower_frequency * (i - len))
+ / (i - len);
+ /* Blackman windowing */
+ kernel_lp[i] *= (0.42 - 0.5 * cos (M_PI * i / len)
+ + 0.08 * cos (2 * M_PI * i / len));
+ }
+
+ /* normalize for unity gain at DC
+ * FIXME: sure this is not supposed to be quadratic ? */
+ sum = 0.0;
+ for (i = 0; i <= len * 2; ++i)
+ sum += kernel_lp[i];
+ for (i = 0; i <= len * 2; ++i)
+ kernel_lp[i] /= sum;
+
+ /* fill the hp kernel */
+ GST_DEBUG ("bpwsinc: initializing HP kernel of length %d with cut-off %f",
+ len * 2 + 1, this->upper_frequency);
+ kernel_hp = (double *) g_malloc (sizeof (double) * (2 * len + 1));
+ for (i = 0; i <= len * 2; ++i) {
+ if (i == len)
+ kernel_hp[i] = 2 * M_PI * this->upper_frequency;
+ else
+ kernel_hp[i] = sin (2 * M_PI * this->upper_frequency * (i - len))
+ / (i - len);
+ /* Blackman windowing */
+ kernel_hp[i] *= (0.42 - 0.5 * cos (M_PI * i / len)
+ + 0.08 * cos (2 * M_PI * i / len));
}
- return set_retval;
+ /* normalize for unity gain at DC
+ * FIXME: sure this is not supposed to be quadratic ? */
+ sum = 0.0;
+ for (i = 0; i <= len * 2; ++i)
+ sum += kernel_hp[i];
+ for (i = 0; i <= len * 2; ++i)
+ kernel_hp[i] /= sum;
+
+ /* combine the two thiss */
+ this->kernel = (double *) g_malloc (sizeof (double) * (2 * len + 1));
+
+ for (i = 0; i <= len * 2; ++i)
+ this->kernel[i] = kernel_lp[i] + kernel_hp[i];
+
+ /* do spectral inversion to go from band reject to bandpass */
+ for (i = 0; i <= len * 2; ++i)
+ this->kernel[i] = -this->kernel[i];
+ this->kernel[len] += 1;
+
+ /* free the helper kernels */
+ g_free (kernel_lp);
+ g_free (kernel_hp);
+
+ /* set up the residue memory space */
+ this->residue = (gfloat *) g_malloc (sizeof (gfloat) * (len * 2 + 1));
+ for (i = 0; i <= len * 2; ++i)
+ this->residue[i] = 0.0;
+
+ return TRUE;
}
-static void
-gst_bpwsinc_chain (GstPad * pad, GstData * _data)
+static GstFlowReturn
+bpwsinc_transform_ip (GstBaseTransform * base, GstBuffer * outbuf)
{
- GstBuffer *buf = GST_BUFFER (_data);
- GstBPWSinc *filter;
+ GstBPWSinc *this = GST_BPWSINC (base);
+ GstClockTime timestamp;
+
+ /* 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);
+
gfloat *src;
gfloat *input;
- gint residue_samples;
+ int residue_samples;
gint input_samples;
gint total_samples;
int i, j;
- filter = GST_BPWSINC (gst_pad_get_parent (pad));
-
/* FIXME: out of laziness, we copy the left-over bit from last buffer
* together with the incoming buffer to a new buffer to make the loop
* easy; this could be a lot more optimized though
* to make amends we keep the incoming buffer around and write our
* output samples there */
- /* get a writable buffer */
- buf = gst_buffer_copy_on_write (buf);
-
- src = (gfloat *) GST_BUFFER_DATA (buf);
- residue_samples = filter->wing_size * 2 + 1;
- input_samples = GST_BUFFER_SIZE (buf) / sizeof (gfloat);
+ src = (gfloat *) GST_BUFFER_DATA (outbuf);
+ residue_samples = this->wing_size * 2 + 1;
+ input_samples = GST_BUFFER_SIZE (outbuf) / sizeof (gfloat);
total_samples = residue_samples + input_samples;
input = (gfloat *) g_malloc (sizeof (gfloat) * total_samples);
/* copy the left-over bit */
- memcpy (input, filter->residue, sizeof (gfloat) * residue_samples);
+ memcpy (input, this->residue, sizeof (gfloat) * residue_samples);
/* copy the new buffer */
memcpy (&input[residue_samples], src, sizeof (gfloat) * input_samples);
/* copy the tail of the current input buffer to the residue */
- memcpy (filter->residue, &src[input_samples - residue_samples],
+ memcpy (this->residue, &src[input_samples - residue_samples],
sizeof (gfloat) * residue_samples);
/* convolution */
for (i = 0; i < input_samples; ++i) {
src[i] = 0.0;
for (j = 0; j < residue_samples; ++j)
- src[i] += input[i - j + residue_samples] * filter->kernel[j];
+ src[i] += input[i - j + residue_samples] * this->kernel[j];
}
g_free (input);
- gst_pad_push (filter->srcpad, GST_DATA (buf));
+
+ return GST_FLOW_OK;
}
static void
-gst_bpwsinc_set_property (GObject * object, guint prop_id, const GValue * value,
+bpwsinc_set_property (GObject * object, guint prop_id, const GValue * value,
GParamSpec * pspec)
{
- GstBPWSinc *filter;
-
- g_return_if_fail (GST_IS_BPWSINC (object));
+ GstBPWSinc *this = GST_BPWSINC (object);
- filter = GST_BPWSINC (object);
+ g_return_if_fail (GST_IS_BPWSINC (this));
switch (prop_id) {
- case ARG_LENGTH:
- filter->wing_size = g_value_get_int (value);
+ case PROP_LENGTH:
+ this->wing_size = g_value_get_int (value);
break;
- case ARG_LOWER_FREQUENCY:
- filter->lower_frequency = g_value_get_double (value);
+ case PROP_LOWER_FREQUENCY:
+ this->lower_frequency = g_value_get_double (value);
break;
- case ARG_UPPER_FREQUENCY:
- filter->upper_frequency = g_value_get_double (value);
+ case PROP_UPPER_FREQUENCY:
+ this->upper_frequency = g_value_get_double (value);
break;
default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
-gst_bpwsinc_get_property (GObject * object, guint prop_id, GValue * value,
+bpwsinc_get_property (GObject * object, guint prop_id, GValue * value,
GParamSpec * pspec)
{
- GstBPWSinc *filter;
-
- g_return_if_fail (GST_IS_BPWSINC (object));
-
- filter = GST_BPWSINC (object);
+ GstBPWSinc *this = GST_BPWSINC (object);
switch (prop_id) {
- case ARG_LENGTH:
- g_value_set_int (value, filter->wing_size);
+ case PROP_LENGTH:
+ g_value_set_int (value, this->wing_size);
break;
- case ARG_LOWER_FREQUENCY:
- g_value_set_double (value, filter->lower_frequency);
+ case PROP_LOWER_FREQUENCY:
+ g_value_set_double (value, this->lower_frequency);
break;
- case ARG_UPPER_FREQUENCY:
- g_value_set_double (value, filter->upper_frequency);
+ case PROP_UPPER_FREQUENCY:
+ g_value_set_double (value, this->upper_frequency);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
/* -*- 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 along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
- */
-
-/* this windowed sinc filter is taken from the freely downloadable DSP book,
+ *
+ *
+ * this windowed sinc filter is taken from the freely downloadable DSP book,
* "The Scientist and Engineer's Guide to Digital Signal Processing",
* chapter 16
* available at http://www.dspguide.com/
- */
-
-/* FIXME:
+ *
+ * FIXME:
* - this filter is totally unoptimized !
* - we do not destroy the allocated memory for filters and residue
* - this might be improved upon with bytestream
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
+
+#include <string.h>
+#include <math.h>
#include <gst/gst.h>
-#include "gstfilter.h"
-#include <math.h> /* M_PI */
-#include <string.h> /* memmove */
+#include <gst/base/gstbasetransform.h>
+#include <gst/controller/gstcontroller.h>
+
+#include "gstlpwsinc.h"
+
+#define GST_CAT_DEFAULT gst_lpwsinc_debug
+GST_DEBUG_CATEGORY_STATIC (GST_CAT_DEFAULT);
-static const GstElementDetails gst_lpwsinc_details =
+static const GstElementDetails lpwsinc_details =
GST_ELEMENT_DETAILS ("Low-pass Windowed sinc filter",
"Filter/Effect/Audio",
"Low-pass Windowed sinc filter",
- "Thomas <thomas@apestaart.org>, " "Steven W. Smith");
+ "Thomas <thomas@apestaart.org>, "
+ "Steven W. Smith, "
+ "Dreamlab Technologies Ltd. <mathis.hofer@dreamlab.net>");
+/* Filter signals and args */
enum
{
/* FILL ME */
enum
{
- ARG_0,
- ARG_LENGTH,
- ARG_FREQUENCY
-};
-
-#define GST_TYPE_LPWSINC \
- (gst_lpwsinc_get_type())
-#define GST_LPWSINC(obj) \
- (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_LPWSINC,GstLPWSinc))
-#define GST_LPWSINC_CLASS(klass) \
- (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_ULAW,GstLPWSinc))
-#define GST_IS_LPWSINC(obj) \
- (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_LPWSINC))
-#define GST_IS_LPWSINC_CLASS(obj) \
- (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_LPWSINC))
-
-typedef struct _GstLPWSinc GstLPWSinc;
-typedef struct _GstLPWSincClass GstLPWSincClass;
-
-struct _GstLPWSinc
-{
- GstElement element;
-
- GstPad *sinkpad, *srcpad;
-
- double frequency;
- int wing_size; /* length of a "wing" of the filter;
- actual length is 2 * wing_size + 1 */
-
- gfloat *residue; /* buffer for left-over samples from previous buffer */
- double *kernel;
-};
-
-struct _GstLPWSincClass
-{
- GstElementClass parent_class;
+ PROP_0,
+ PROP_LENGTH,
+ PROP_FREQUENCY
};
-static void gst_lpwsinc_base_init (gpointer g_class);
-static void gst_lpwsinc_class_init (GstLPWSincClass * klass);
-static void gst_lpwsinc_init (GstLPWSinc * filter);
-
-static void gst_lpwsinc_set_property (GObject * object, guint prop_id,
+static GstStaticPadTemplate lpwsinc_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 lpwsinc_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_lpwsinc_debug, "lpwsinc", 0, "Low-pass Windowed sinc filter plugin");
+
+GST_BOILERPLATE_FULL (GstLPWSinc, gst_lpwsinc, GstBaseTransform,
+ GST_TYPE_BASE_TRANSFORM, DEBUG_INIT);
+
+static void lpwsinc_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
-static void gst_lpwsinc_get_property (GObject * object, guint prop_id,
+static void lpwsinc_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
-static void gst_lpwsinc_chain (GstPad * pad, GstData * _data);
-static GstPadLinkReturn
-gst_lpwsinc_sink_connect (GstPad * pad, const GstCaps * caps);
+static GstFlowReturn lpwsinc_transform_ip (GstBaseTransform * base,
+ GstBuffer * outbuf);
+static gboolean lpwsinc_set_caps (GstBaseTransform * base, GstCaps * incaps,
+ GstCaps * outcaps);
-static GstElementClass *parent_class = NULL;
+/* Element class */
-/*static guint gst_lpwsinc_signals[LAST_SIGNAL] = { 0 }; */
-
-GType
-gst_lpwsinc_get_type (void)
+static void
+gst_lpwsinc_dispose (GObject * object)
{
- static GType lpwsinc_type = 0;
-
- if (!lpwsinc_type) {
- static const GTypeInfo lpwsinc_info = {
- sizeof (GstLPWSincClass),
- gst_lpwsinc_base_init,
- NULL,
- (GClassInitFunc) gst_lpwsinc_class_init, NULL, NULL,
- sizeof (GstLPWSinc), 0,
- (GInstanceInitFunc) gst_lpwsinc_init,
- };
-
- lpwsinc_type = g_type_register_static (GST_TYPE_ELEMENT, "GstLPWSinc",
- &lpwsinc_info, 0);
- }
- return lpwsinc_type;
+ G_OBJECT_CLASS (parent_class)->dispose (object);
}
static void
{
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 (&lpwsinc_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_lpwsinc_details);
+ gst_static_pad_template_get (&lpwsinc_sink_template));
+ gst_element_class_set_details (element_class, &lpwsinc_details);
}
static void
gst_lpwsinc_class_init (GstLPWSincClass * 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 = lpwsinc_set_property;
+ gobject_class->get_property = lpwsinc_get_property;
+ gobject_class->dispose = gst_lpwsinc_dispose;
- g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_FREQUENCY,
+ g_object_class_install_property (gobject_class, PROP_FREQUENCY,
g_param_spec_double ("frequency", "Frequency",
- "Cut-off Frequency relative to sample rate)",
+ "Cut-off Frequency relative to sample rate",
0.0, 0.5, 0, G_PARAM_READWRITE));
- g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_LENGTH,
+
+ g_object_class_install_property (gobject_class, PROP_LENGTH,
g_param_spec_int ("length", "Length",
"N such that the filter length = 2N + 1",
1, G_MAXINT, 1, G_PARAM_READWRITE));
- gobject_class->set_property = gst_lpwsinc_set_property;
- gobject_class->get_property = gst_lpwsinc_get_property;
+ trans_class->transform_ip = GST_DEBUG_FUNCPTR (lpwsinc_transform_ip);
+ trans_class->set_caps = GST_DEBUG_FUNCPTR (lpwsinc_set_caps);
}
static void
-gst_lpwsinc_init (GstLPWSinc * filter)
+gst_lpwsinc_init (GstLPWSinc * this, GstLPWSincClass * 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_lpwsinc_chain);
- gst_pad_set_link_function (filter->sinkpad, gst_lpwsinc_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->wing_size = 50;
- filter->frequency = 0.25;
- filter->kernel = NULL;
+ this->wing_size = 50;
+ this->frequency = 0.25;
+ this->kernel = NULL;
}
-static GstPadLinkReturn
-gst_lpwsinc_sink_connect (GstPad * pad, const GstCaps * caps)
+
+/* GstBaseTransform vmethod implementations */
+
+/* get notified of caps and plug in the correct process function */
+static gboolean
+lpwsinc_set_caps (GstBaseTransform * base, GstCaps * incaps, GstCaps * outcaps)
{
int i = 0;
double sum = 0.0;
int len = 0;
- GstLPWSinc *filter = GST_LPWSINC (gst_pad_get_parent (pad));
- GstPadLinkReturn set_retval;
-
- g_assert (GST_IS_PAD (pad));
- g_assert (caps != NULL);
-
- 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 */
- /* fill the kernel */
- g_print ("DEBUG: initing filter kernel\n");
- len = filter->wing_size;
- GST_DEBUG ("lpwsinc: initializing filter kernel of length %d", len * 2 + 1);
- filter->kernel = (double *) g_malloc (sizeof (double) * (2 * len + 1));
-
- for (i = 0; i <= len * 2; ++i) {
- if (i == len)
- filter->kernel[i] = 2 * M_PI * filter->frequency;
- else
- filter->kernel[i] = sin (2 * M_PI * filter->frequency * (i - len))
- / (i - len);
- /* windowing */
- filter->kernel[i] *= (0.54 - 0.46 * cos (M_PI * i / len));
- }
-
- /* normalize for unity gain at DC
- * FIXME: sure this is not supposed to be quadratic ? */
- for (i = 0; i <= len * 2; ++i)
- sum += filter->kernel[i];
- for (i = 0; i <= len * 2; ++i)
- filter->kernel[i] /= sum;
-
- /* set up the residue memory space */
- filter->residue = (gfloat *) g_malloc (sizeof (gfloat) * (len * 2 + 1));
- for (i = 0; i <= len * 2; ++i)
- filter->residue[i] = 0.0;
+ GstLPWSinc *this = GST_LPWSINC (base);
+
+ GST_DEBUG_OBJECT (this,
+ "set_caps: in %" GST_PTR_FORMAT " out %" GST_PTR_FORMAT, incaps, outcaps);
+
+ /* FIXME: remember to free it */
+ /* fill the kernel */
+ g_print ("DEBUG: initing filter kernel\n");
+ len = this->wing_size;
+ GST_DEBUG ("lpwsinc: initializing filter kernel of length %d", len * 2 + 1);
+ this->kernel = (double *) g_malloc (sizeof (double) * (2 * len + 1));
+
+ for (i = 0; i <= len * 2; ++i) {
+ if (i == len)
+ this->kernel[i] = 2 * M_PI * this->frequency;
+ else
+ this->kernel[i] =
+ sin (2 * M_PI * this->frequency * (i - len)) / (i - len);
+ /* windowing */
+ this->kernel[i] *= (0.54 - 0.46 * cos (M_PI * i / len));
}
- return set_retval;
+ /* normalize for unity gain at DC
+ * FIXME: sure this is not supposed to be quadratic ? */
+ for (i = 0; i <= len * 2; ++i)
+ sum += this->kernel[i];
+ for (i = 0; i <= len * 2; ++i)
+ this->kernel[i] /= sum;
+
+ /* set up the residue memory space */
+ this->residue = (gfloat *) g_malloc (sizeof (gfloat) * (len * 2 + 1));
+ for (i = 0; i <= len * 2; ++i)
+ this->residue[i] = 0.0;
+
+ return TRUE;
}
-static void
-gst_lpwsinc_chain (GstPad * pad, GstData * _data)
+static GstFlowReturn
+lpwsinc_transform_ip (GstBaseTransform * base, GstBuffer * outbuf)
{
- GstBuffer *buf = GST_BUFFER (_data);
- GstLPWSinc *filter;
+ GstLPWSinc *this = GST_LPWSINC (base);
+ GstClockTime timestamp;
+
+ /* 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);
+
gfloat *src;
gfloat *input;
- gint residue_samples;
+ int residue_samples;
gint input_samples;
gint total_samples;
int i, j;
- filter = GST_LPWSINC (gst_pad_get_parent (pad));
-
/* FIXME: out of laziness, we copy the left-over bit from last buffer
* together with the incoming buffer to a new buffer to make the loop
* easy; this could be a lot more optimized though
* to make amends we keep the incoming buffer around and write our
* output samples there */
- /* get a writable buffer */
- buf = gst_buffer_copy_on_write (buf);
-
- src = (gfloat *) GST_BUFFER_DATA (buf);
- residue_samples = filter->wing_size * 2 + 1;
- input_samples = GST_BUFFER_SIZE (buf) / sizeof (gfloat);
+ src = (gfloat *) GST_BUFFER_DATA (outbuf);
+ residue_samples = this->wing_size * 2 + 1;
+ input_samples = GST_BUFFER_SIZE (outbuf) / sizeof (gfloat);
total_samples = residue_samples + input_samples;
input = (gfloat *) g_malloc (sizeof (gfloat) * total_samples);
/* copy the left-over bit */
- memcpy (input, filter->residue, sizeof (gfloat) * residue_samples);
+ memcpy (input, this->residue, sizeof (gfloat) * residue_samples);
/* copy the new buffer */
memcpy (&input[residue_samples], src, sizeof (gfloat) * input_samples);
/* copy the tail of the current input buffer to the residue */
- memcpy (filter->residue, &src[input_samples - residue_samples],
+ memcpy (this->residue, &src[input_samples - residue_samples],
sizeof (gfloat) * residue_samples);
/* convolution */
for (i = 0; i < input_samples; ++i) {
src[i] = 0.0;
for (j = 0; j < residue_samples; ++j)
- src[i] += input[i - j + residue_samples] * filter->kernel[j];
+ src[i] += input[i - j + residue_samples] * this->kernel[j];
}
g_free (input);
- gst_pad_push (filter->srcpad, GST_DATA (buf));
+
+ return GST_FLOW_OK;
}
static void
-gst_lpwsinc_set_property (GObject * object, guint prop_id, const GValue * value,
+lpwsinc_set_property (GObject * object, guint prop_id, const GValue * value,
GParamSpec * pspec)
{
- GstLPWSinc *filter;
+ GstLPWSinc *this = GST_LPWSINC (object);
- g_return_if_fail (GST_IS_LPWSINC (object));
-
- filter = GST_LPWSINC (object);
+ g_return_if_fail (GST_IS_LPWSINC (this));
switch (prop_id) {
- case ARG_LENGTH:
- filter->wing_size = g_value_get_int (value);
+ case PROP_LENGTH:
+ this->wing_size = g_value_get_int (value);
break;
- case ARG_FREQUENCY:
- filter->frequency = g_value_get_double (value);
+ case PROP_FREQUENCY:
+ this->frequency = g_value_get_double (value);
break;
default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
-gst_lpwsinc_get_property (GObject * object, guint prop_id, GValue * value,
+lpwsinc_get_property (GObject * object, guint prop_id, GValue * value,
GParamSpec * pspec)
{
- GstLPWSinc *filter;
-
- g_return_if_fail (GST_IS_LPWSINC (object));
-
- filter = GST_LPWSINC (object);
+ GstLPWSinc *this = GST_LPWSINC (object);
switch (prop_id) {
- case ARG_LENGTH:
- g_value_set_int (value, filter->wing_size);
+ case PROP_LENGTH:
+ g_value_set_int (value, this->wing_size);
break;
- case ARG_FREQUENCY:
- g_value_set_double (value, filter->frequency);
+ case PROP_FREQUENCY:
+ g_value_set_double (value, this->frequency);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
projects / platform / upstream / gst-plugins-good.git / commitdiff