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gstreamer/gst/level/gstlevel.c
Andy Wingo f2d5cae8da /GstBuffer/GstData/ in the API where you can pass events. Fix the plugins to deal with that. Fixes #113488. 
Original commit message from CVS:
/GstBuffer/GstData/ in the API where you can pass events. Fix the plugins to deal with that. Fixes #113488.
2003-10-08 16:08:18 +00:00

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/* GStreamer
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
*
* gstlevel.c: signals RMS, peak and decaying peak levels
* Copyright (C) 2000,2001,2002,2003
* Thomas Vander Stichele <thomas at apestaart dot org>
*
* 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 <gst/gst.h>
#include "gstlevel.h"
#include "math.h"
/* elementfactory information */
static GstElementDetails level_details = {
"Level",
"Filter/Audio/Analysis",
"LGPL",
"RMS/Peak/Decaying Peak Level signaller for audio/raw",
VERSION,
"Thomas <thomas@apestaart.org>",
"(C) 2001, 2003, 2003",
};
/* pad templates */
GST_PAD_TEMPLATE_FACTORY (sink_template_factory,
"level_sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_CAPS_NEW (
"level_sink",
"audio/x-raw-int",
"signed", GST_PROPS_BOOLEAN (TRUE),
"width", GST_PROPS_LIST (
GST_PROPS_INT (8),
GST_PROPS_INT (16)
),
"depth", GST_PROPS_LIST (
GST_PROPS_INT (8),
GST_PROPS_INT (16)
),
"rate", GST_PROPS_INT_RANGE (1, G_MAXINT),
"channels", GST_PROPS_INT_RANGE (1, 2)
)
)
GST_PAD_TEMPLATE_FACTORY (src_template_factory,
"level_src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_CAPS_NEW (
"level_src",
"audio/x-raw-int",
"signed", GST_PROPS_BOOLEAN (TRUE),
"width", GST_PROPS_LIST (
GST_PROPS_INT (8),
GST_PROPS_INT (16)
),
"depth", GST_PROPS_LIST (
GST_PROPS_INT (8),
GST_PROPS_INT (16)
),
"rate", GST_PROPS_INT_RANGE (1, G_MAXINT),
"channels", GST_PROPS_INT_RANGE (1, 2)
)
)
/* Filter signals and args */
enum {
/* FILL ME */
SIGNAL_LEVEL,
LAST_SIGNAL
};
enum {
ARG_0,
ARG_SIGNAL_LEVEL,
ARG_SIGNAL_INTERVAL,
ARG_PEAK_TTL,
ARG_PEAK_FALLOFF
};
static void gst_level_class_init (GstLevelClass *klass);
static void gst_level_init (GstLevel *filter);
static void gst_level_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec);
static void gst_level_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec);
static void gst_level_chain (GstPad *pad, GstData *_data);
static GstElementClass *parent_class = NULL;
static guint gst_filter_signals[LAST_SIGNAL] = { 0 };
GType
gst_level_get_type (void)
{
static GType level_type = 0;
if (!level_type)
{
static const GTypeInfo level_info =
{
sizeof (GstLevelClass), NULL, NULL,
(GClassInitFunc) gst_level_class_init, NULL, NULL,
sizeof (GstLevel), 0,
(GInstanceInitFunc) gst_level_init
};
level_type = g_type_register_static (GST_TYPE_ELEMENT, "GstLevel",
&level_info, 0);
}
return level_type;
}
static GstPadLinkReturn
gst_level_connect (GstPad *pad, GstCaps *caps)
{
GstLevel *filter;
GstPad *otherpad;
GstPadLinkReturn res;
int i;
filter = GST_LEVEL (gst_pad_get_parent (pad));
g_return_val_if_fail (filter != NULL, GST_PAD_LINK_REFUSED);
g_return_val_if_fail (GST_IS_LEVEL (filter), GST_PAD_LINK_REFUSED);
otherpad = (pad == filter->srcpad ? filter->sinkpad : filter->srcpad);
if (GST_CAPS_IS_FIXED (caps))
{
/* yep, got them */
res = gst_pad_try_set_caps (otherpad, caps);
/* if ok, set filter */
if (res == GST_PAD_LINK_OK)
{
filter->num_samples = 0;
/* FIXME: error handling */
if (! gst_caps_get_int (caps, "rate", &(filter->rate)))
g_warning ("WARNING: level: Could not get rate from caps\n");
if (!gst_caps_get_int (caps, "width", &(filter->width)))
g_warning ("WARNING: level: Could not get width from caps\n");
if (!gst_caps_get_int (caps, "channels", &(filter->channels)))
g_warning ("WARNING: level: Could not get number of channels from caps\n");
/* allocate channel variable arrays */
if (filter->CS) g_free (filter->CS);
if (filter->peak) g_free (filter->peak);
if (filter->last_peak) g_free (filter->last_peak);
if (filter->decay_peak) g_free (filter->decay_peak);
if (filter->decay_peak_age) g_free (filter->decay_peak_age);
if (filter->MS) g_free (filter->MS);
if (filter->RMS_dB) g_free (filter->RMS_dB);
filter->CS = g_new (double, filter->channels);
filter->peak = g_new (double, filter->channels);
filter->last_peak = g_new (double, filter->channels);
filter->decay_peak = g_new (double, filter->channels);
filter->decay_peak_age = g_new (double, filter->channels);
filter->MS = g_new (double, filter->channels);
filter->RMS_dB = g_new (double, filter->channels);
for (i = 0; i < filter->channels; ++i)
{
filter->CS[i] = filter->peak[i] = filter->last_peak[i] =
filter->decay_peak[i] = filter->decay_peak_age[i] =
filter->MS[i] = filter->RMS_dB[i] = 0.0;
}
}
return res;
}
return GST_PAD_LINK_DELAYED;
}
static void inline
gst_level_fast_16bit_chain (gint16* in, guint num, gint channels,
gint resolution, double *CS, double *peak)
#include "filter.func"
static void inline
gst_level_fast_8bit_chain (gint8* in, guint num, gint channels,
gint resolution, double *CS, double *peak)
#include "filter.func"
static void
gst_level_chain (GstPad *pad, GstData *_data)
{
GstBuffer *buf = GST_BUFFER (_data);
GstLevel *filter;
gint16 *in_data;
double CS = 0.0;
gint num_samples = 0;
gint i;
g_return_if_fail (pad != NULL);
g_return_if_fail (GST_IS_PAD (pad));
g_return_if_fail (buf != NULL);
filter = GST_LEVEL (GST_OBJECT_PARENT (pad));
g_return_if_fail (filter != NULL);
g_return_if_fail (GST_IS_LEVEL (filter));
for (i = 0; i < filter->channels; ++i)
filter->CS[i] = filter->peak[i] = filter->MS[i] = filter->RMS_dB[i] = 0.0;
in_data = (gint16 *) GST_BUFFER_DATA (buf);
num_samples = GST_BUFFER_SIZE (buf) / (filter->width / 8);
if (num_samples % filter->channels != 0)
g_warning ("WARNING: level: programming error, data not properly interleaved");
for (i = 0; i < filter->channels; ++i)
{
switch (filter->width)
{
case 16:
gst_level_fast_16bit_chain (in_data + i, num_samples,
filter->channels, filter->width - 1,
&CS, &filter->peak[i]);
break;
case 8:
gst_level_fast_8bit_chain (((gint8 *) in_data) + i, num_samples,
filter->channels, filter->width - 1,
&CS, &filter->peak[i]);
break;
}
/* g_print ("DEBUG: CS %f, peak %f\n", CS, filter->peak[i]); */
filter->CS[i] += CS;
}
gst_pad_push (filter->srcpad, GST_DATA (buf));
filter->num_samples += num_samples;
for (i = 0; i < filter->channels; ++i)
{
filter->decay_peak_age[i] += num_samples;
/* g_print ("filter peak info [%d]: peak %f, age %f\n", i,
filter->last_peak[i], filter->decay_peak_age[i]); */
/* update running peak */
if (filter->peak[i] > filter->last_peak[i])
filter->last_peak[i] = filter->peak[i];
/* update decay peak */
if (filter->peak[i] >= filter->decay_peak[i])
{
/* g_print ("new peak, %f\n", filter->peak[i]); */
filter->decay_peak[i] = filter->peak[i];
filter->decay_peak_age[i] = 0;
}
else
{
/* make decay peak fall off if too old */
if (filter->decay_peak_age[i] > filter->rate * filter->decay_peak_ttl)
{
double falloff_dB;
double falloff;
double length; /* length of buffer in seconds */
length = (double) num_samples / (filter->channels * filter->rate);
falloff_dB = filter->decay_peak_falloff * length;
falloff = pow (10, falloff_dB / -20.0);
/* g_print ("falloff: length %f, dB falloff %f, falloff factor %e\n",
length, falloff_dB, falloff); */
filter->decay_peak[i] *= falloff;
/* g_print ("peak is %f samples old, decayed with factor %e to %f\n",
filter->decay_peak_age[i], falloff, filter->decay_peak[i]); */
}
}
}
/* do we need to emit ? */
if (filter->num_samples >= filter->interval * (gdouble) filter->rate)
{
if (filter->signal)
{
gdouble RMS, peak, endtime;
for (i = 0; i < filter->channels; ++i)
{
RMS = sqrt (filter->CS[i] / (filter->num_samples / filter->channels));
peak = filter->last_peak[i];
num_samples = GST_BUFFER_SIZE (buf) / (filter->width / 8);
endtime = (double) GST_BUFFER_TIMESTAMP (buf) / GST_SECOND
+ (double) num_samples / (double) filter->rate;
g_signal_emit (G_OBJECT (filter), gst_filter_signals[SIGNAL_LEVEL], 0,
endtime, i,
20 * log10 (RMS), 20 * log10 (filter->last_peak[i]),
20 * log10 (filter->decay_peak[i]));
/* we emitted, so reset cumulative and normal peak */
filter->CS[i] = 0.0;
filter->last_peak[i] = 0.0;
}
}
filter->num_samples = 0;
}
}
static void
gst_level_set_property (GObject *object, guint prop_id,
const GValue *value, GParamSpec *pspec)
{
GstLevel *filter;
/* it's not null if we got it, but it might not be ours */
g_return_if_fail (GST_IS_LEVEL (object));
filter = GST_LEVEL (object);
switch (prop_id) {
case ARG_SIGNAL_LEVEL:
filter->signal = g_value_get_boolean (value);
break;
case ARG_SIGNAL_INTERVAL:
filter->interval = g_value_get_double (value);
break;
case ARG_PEAK_TTL:
filter->decay_peak_ttl = g_value_get_double (value);
break;
case ARG_PEAK_FALLOFF:
filter->decay_peak_falloff = g_value_get_double (value);
break;
default:
break;
}
}
static void
gst_level_get_property (GObject *object, guint prop_id,
GValue *value, GParamSpec *pspec)
{
GstLevel *filter;
/* it's not null if we got it, but it might not be ours */
g_return_if_fail (GST_IS_LEVEL (object));
filter = GST_LEVEL (object);
switch (prop_id) {
case ARG_SIGNAL_LEVEL:
g_value_set_boolean (value, filter->signal);
break;
case ARG_SIGNAL_INTERVAL:
g_value_set_double (value, filter->interval);
break;
case ARG_PEAK_TTL:
g_value_set_double (value, filter->decay_peak_ttl);
break;
case ARG_PEAK_FALLOFF:
g_value_set_double (value, filter->decay_peak_falloff);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_level_class_init (GstLevelClass *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_SIGNAL_LEVEL,
g_param_spec_boolean ("signal", "Signal",
"Emit level signals for each interval",
TRUE, G_PARAM_READWRITE));
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_SIGNAL_INTERVAL,
g_param_spec_double ("interval", "Interval",
"Interval between emissions (in seconds)",
0.01, 100.0, 0.1, G_PARAM_READWRITE));
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_PEAK_TTL,
g_param_spec_double ("peak_ttl", "Peak TTL",
"Time To Live of decay peak before it falls back",
0, 100.0, 0.3, G_PARAM_READWRITE));
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_PEAK_FALLOFF,
g_param_spec_double ("peak_falloff", "Peak Falloff",
"Decay rate of decay peak after TTL (in dB/sec)",
0.0, G_MAXDOUBLE, 10.0, G_PARAM_READWRITE));
gobject_class->set_property = gst_level_set_property;
gobject_class->get_property = gst_level_get_property;
gst_filter_signals[SIGNAL_LEVEL] =
g_signal_new ("level", G_TYPE_FROM_CLASS(klass), G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GstLevelClass, level), NULL, NULL,
gstlevel_cclosure_marshal_VOID__DOUBLE_INT_DOUBLE_DOUBLE_DOUBLE,
G_TYPE_NONE, 5,
G_TYPE_DOUBLE, G_TYPE_INT,
G_TYPE_DOUBLE, G_TYPE_DOUBLE, G_TYPE_DOUBLE);
}
static void
gst_level_init (GstLevel *filter)
{
filter->sinkpad = gst_pad_new_from_template (GST_PAD_TEMPLATE_GET (sink_template_factory), "sink");
gst_pad_set_link_function (filter->sinkpad, gst_level_connect);
filter->srcpad = gst_pad_new_from_template (GST_PAD_TEMPLATE_GET (src_template_factory), "src");
gst_pad_set_link_function (filter->srcpad, gst_level_connect);
gst_element_add_pad (GST_ELEMENT (filter), filter->sinkpad);
gst_pad_set_chain_function (filter->sinkpad, gst_level_chain);
filter->srcpad = gst_pad_new ("src", GST_PAD_SRC);
gst_element_add_pad (GST_ELEMENT (filter), filter->srcpad);
filter->CS = NULL;
filter->peak = NULL;
filter->MS = NULL;
filter->RMS_dB = NULL;
filter->rate = 0;
filter->width = 0;
filter->channels = 0;
filter->interval = 0.1;
filter->decay_peak_ttl = 0.4;
filter->decay_peak_falloff = 10.0; /* dB falloff (/sec) */
}
static gboolean
plugin_init (GModule *module, GstPlugin *plugin)
{
GstElementFactory *factory;
factory = gst_element_factory_new ("level", GST_TYPE_LEVEL,
&level_details);
g_return_val_if_fail (factory != NULL, FALSE);
gst_element_factory_add_pad_template (factory, GST_PAD_TEMPLATE_GET (sink_template_factory));
gst_element_factory_add_pad_template (factory, GST_PAD_TEMPLATE_GET (src_template_factory));
gst_plugin_add_feature (plugin, GST_PLUGIN_FEATURE (factory));
return TRUE;
}
GstPluginDesc plugin_desc = {
GST_VERSION_MAJOR,
GST_VERSION_MINOR,
"level",
plugin_init
};
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