gstreamer/gst/spectrum/gstspectrum.c
Stefan Kost 5b377ab143 gst/spectrum/gstspectrum.c: Implements stop() to clear the adapter and event() to clear the adapter on FLUSH_STOP and...
Original commit message from CVS:
* gst/spectrum/gstspectrum.c: (gst_spectrum_class_init),
(gst_spectrum_start), (gst_spectrum_stop), (gst_spectrum_event):
Implements stop() to clear the adapter and event() to clear the
adapter on FLUSH_STOP and EOS.
2006-09-12 20:18:55 +00:00

540 lines
16 KiB
C

/* GStreamer
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
* <2006> Stefan Kost <ensonic@users.sf.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.
*/
/**
* SECTION:element-spectrum
*
* <refsect2>
* The Spectrum element analyzes the frequency spectrum of an audio signal.
* If <link linkend="GstSpectrum--message">message property</link> is #TRUE it
* sends analysis results as application message named
* <classname>&quot;spectrum&quot;</classname> after each interval of time given
* by the <link linkend="GstSpectrum--interval">interval property</link>.
* The message's structure contains two fields:
* <itemizedlist>
* <listitem>
* <para>
* #GstClockTime
* <classname>&quot;endtime&quot;</classname>:
* the end time of the buffer that triggered the message
* </para>
* </listitem>
* <listitem>
* <para>
* #GstValueList of #guchar
* <classname>&quot;spectrum&quot;</classname>:
* the level for each frequency band. A value of 0 maps to the
* db value given by the
* <link linkend="GstSpectrum--threshold">threshold property.</link>.
* </para>
* </listitem>
*
* This element cannot be used with the gst-launch command in a sensible way.
* The included demo shows how to use it in an application.
*
* Last reviewed on 2006-05-21 (0.10.3)
* </refsect2>
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <string.h>
#include <gst/audio/audio.h>
#include "gstspectrum.h"
GST_DEBUG_CATEGORY_STATIC (gst_spectrum_debug);
#define GST_CAT_DEFAULT gst_spectrum_debug
/* elementfactory information */
static const GstElementDetails gst_spectrum_details =
GST_ELEMENT_DETAILS ("Spectrum analyzer",
"Filter/Analyzer/Audio",
"Run an FFT on the audio signal, output spectrum data",
"Erik Walthinsen <omega@cse.ogi.edu>, "
"Stefan Kost <ensonic@users.sf.net>");
static GstStaticPadTemplate sink_template_factory =
GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("audio/x-raw-int, "
"rate = (int) [ 1, MAX ], "
"channels = (int) [1, MAX], "
"endianness = (int) BYTE_ORDER, "
"width = (int) 16, " "depth = (int) 16, " "signed = (boolean) true")
);
static GstStaticPadTemplate src_template_factory =
GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("audio/x-raw-int, "
"rate = (int) [ 1, MAX ], "
"channels = (int) [1, MAX], "
"endianness = (int) BYTE_ORDER, "
"width = (int) 16, " "depth = (int) 16, " "signed = (boolean) true")
);
/*
static GstStaticPadTemplate src_template_factory =
GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS_ANY);
*/
/* Spectrum properties */
enum
{
PROP_0,
PROP_SIGNAL_SPECTRUM,
PROP_SIGNAL_INTERVAL,
PROP_BANDS,
PROP_THRESHOLD
};
GST_BOILERPLATE (GstSpectrum, gst_spectrum, GstBaseTransform,
GST_TYPE_BASE_TRANSFORM);
static void gst_spectrum_dispose (GObject * object);
static void gst_spectrum_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_spectrum_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
/*
static gboolean gst_spectrum_set_sink_caps (GstPad * pad, GstCaps * caps);
static GstCaps *gst_spectrum_get_sink_caps (GstPad * pad);
static GstFlowReturn gst_spectrum_chain (GstPad * pad, GstBuffer * buffer);
static GstStateChangeReturn gst_spectrum_change_state (GstElement * element,
GstStateChange transition);
*/
static gboolean gst_spectrum_set_caps (GstBaseTransform * trans, GstCaps * in,
GstCaps * out);
static gboolean gst_spectrum_start (GstBaseTransform * trans);
static gboolean gst_spectrum_stop (GstBaseTransform * trans);
static gboolean gst_spectrum_event (GstBaseTransform * trans, GstEvent * event);
static GstFlowReturn gst_spectrum_transform_ip (GstBaseTransform * trans,
GstBuffer * in);
#define fixed short
extern int gst_spectrum_fix_fft (fixed fr[], fixed fi[], int m, int inverse);
extern void gst_spectrum_fix_loud (fixed loud[], fixed fr[], fixed fi[], int n,
int scale_shift);
extern void gst_spectrum_window (fixed fr[], int n);
static void
gst_spectrum_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 (&sink_template_factory));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&src_template_factory));
gst_element_class_set_details (element_class, &gst_spectrum_details);
}
static void
gst_spectrum_class_init (GstSpectrumClass * klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
GstBaseTransformClass *trans_class = GST_BASE_TRANSFORM_CLASS (klass);
gobject_class->set_property = gst_spectrum_set_property;
gobject_class->get_property = gst_spectrum_get_property;
gobject_class->dispose = gst_spectrum_dispose;
trans_class->set_caps = GST_DEBUG_FUNCPTR (gst_spectrum_set_caps);
trans_class->start = GST_DEBUG_FUNCPTR (gst_spectrum_start);
trans_class->stop = GST_DEBUG_FUNCPTR (gst_spectrum_stop);
trans_class->event = GST_DEBUG_FUNCPTR (gst_spectrum_event);
trans_class->transform_ip = GST_DEBUG_FUNCPTR (gst_spectrum_transform_ip);
trans_class->passthrough_on_same_caps = TRUE;
g_object_class_install_property (gobject_class, PROP_SIGNAL_SPECTRUM,
g_param_spec_boolean ("message", "Message",
"Post a level message for each passed interval",
TRUE, G_PARAM_READWRITE));
g_object_class_install_property (gobject_class, PROP_SIGNAL_INTERVAL,
g_param_spec_uint64 ("interval", "Interval",
"Interval of time between message posts (in nanoseconds)",
1, G_MAXUINT64, GST_SECOND / 10, G_PARAM_READWRITE));
g_object_class_install_property (gobject_class, PROP_BANDS,
g_param_spec_uint ("bands", "Bands", "number of frequency bands",
0, G_MAXUINT, 0, G_PARAM_READWRITE));
g_object_class_install_property (gobject_class, PROP_THRESHOLD,
g_param_spec_int ("threshold", "Threshold",
"db threshold for result, maps to 0", G_MININT, 0, -60,
G_PARAM_READWRITE));
GST_DEBUG_CATEGORY_INIT (gst_spectrum_debug, "spectrum", 0,
"audio spectrum analyser element");
}
static void
gst_spectrum_init (GstSpectrum * spectrum, GstSpectrumClass * g_class)
{
/*
spectrum->sinkpad =
gst_pad_new_from_static_template (&sink_template_factory, "sink");
gst_pad_set_chain_function (spectrum->sinkpad, gst_spectrum_chain);
gst_pad_set_setcaps_function (spectrum->sinkpad, gst_spectrum_set_sink_caps);
gst_pad_set_getcaps_function (spectrum->sinkpad, gst_spectrum_get_sink_caps);
gst_element_add_pad (GST_ELEMENT (spectrum), spectrum->sinkpad);
spectrum->srcpad =
gst_pad_new_from_static_template (&src_template_factory, "src");
gst_element_add_pad (GST_ELEMENT (spectrum), spectrum->srcpad);
*/
spectrum->adapter = gst_adapter_new ();
spectrum->interval = GST_SECOND / 10;
spectrum->bands = 128;
spectrum->base = 9;
spectrum->len = 1024; /* 2 ^ (base+1) */
spectrum->loud = g_malloc (spectrum->len * sizeof (gint16));
spectrum->im = g_malloc0 (spectrum->len * sizeof (gint16));
spectrum->re = g_malloc0 (spectrum->len * sizeof (gint16));
spectrum->spect = g_malloc (spectrum->bands * sizeof (guchar));
}
static void
gst_spectrum_dispose (GObject * object)
{
GstSpectrum *spectrum = GST_SPECTRUM (object);
if (spectrum->adapter) {
g_object_unref (spectrum->adapter);
spectrum->adapter = NULL;
}
g_free (spectrum->re);
g_free (spectrum->im);
g_free (spectrum->loud);
g_free (spectrum->spect);
spectrum->re = NULL;
spectrum->im = NULL;
spectrum->loud = NULL;
spectrum->spect = NULL;
G_OBJECT_CLASS (parent_class)->dispose (object);
}
static void
gst_spectrum_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstSpectrum *filter = GST_SPECTRUM (object);
switch (prop_id) {
case PROP_SIGNAL_SPECTRUM:
filter->message = g_value_get_boolean (value);
break;
case PROP_SIGNAL_INTERVAL:
filter->interval = g_value_get_uint64 (value);
break;
case PROP_BANDS:
filter->bands = g_value_get_uint (value);
g_free (filter->spect);
filter->spect = g_malloc (filter->bands * sizeof (guchar));
GST_DEBUG_OBJECT (filter, "reallocation, spect = %p, bands =%d ",
filter->spect, filter->bands);
break;
case PROP_THRESHOLD:
filter->threshold = g_value_get_int (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_spectrum_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstSpectrum *filter = GST_SPECTRUM (object);
switch (prop_id) {
case PROP_SIGNAL_SPECTRUM:
g_value_set_boolean (value, filter->message);
break;
case PROP_SIGNAL_INTERVAL:
g_value_set_uint64 (value, filter->interval);
break;
case PROP_BANDS:
g_value_set_uint (value, filter->bands);
break;
case PROP_THRESHOLD:
g_value_set_int (value, filter->threshold);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
/*
static gboolean
gst_spectrum_set_sink_caps (GstPad * pad, GstCaps * caps)
{
GstSpectrum *spectrum = GST_SPECTRUM (gst_pad_get_parent (pad));
GstStructure *structure = gst_caps_get_structure (caps, 0);
gboolean ret;
ret = gst_structure_get_int (structure, "channels", &spectrum->channels);
GST_INFO ("Got channels = %d", spectrum->channels);
gst_object_unref (spectrum);
return ret;
}
static GstCaps *
gst_spectrum_get_sink_caps (GstPad * pad)
{
GstSpectrum *spectrum = GST_SPECTRUM (gst_pad_get_parent (pad));
GstCaps *res;
GstStructure *structure;
res = gst_caps_copy (gst_pad_get_pad_template_caps (spectrum->sinkpad));
if (spectrum->channels) {
structure = gst_caps_get_structure (res, 0);
gst_structure_set (structure, "channels", G_TYPE_INT, spectrum->channels,
NULL);
GST_INFO ("Fixate channels = %d", spectrum->channels);
}
gst_object_unref (spectrum);
return res;
}
*/
static gboolean
gst_spectrum_set_caps (GstBaseTransform * trans, GstCaps * in, GstCaps * out)
{
GstSpectrum *filter = GST_SPECTRUM (trans);
GstStructure *structure;
structure = gst_caps_get_structure (in, 0);
gst_structure_get_int (structure, "rate", &filter->rate);
gst_structure_get_int (structure, "channels", &filter->channels);
return TRUE;
}
static gboolean
gst_spectrum_start (GstBaseTransform * trans)
{
GstSpectrum *filter = GST_SPECTRUM (trans);
filter->num_frames = 0;
return TRUE;
}
static gboolean
gst_spectrum_stop (GstBaseTransform * trans)
{
GstSpectrum *filter = GST_SPECTRUM (trans);
gst_adapter_clear (filter->adapter);
return TRUE;
}
static gboolean
gst_spectrum_event (GstBaseTransform * trans, GstEvent * event)
{
GstSpectrum *filter = GST_SPECTRUM (trans);
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_FLUSH_STOP:
case GST_EVENT_EOS:
gst_adapter_clear (filter->adapter);
break;
default:
break;
}
return TRUE;
}
static GstMessage *
gst_spectrum_message_new (GstSpectrum * spectrum, GstClockTime endtime)
{
GstStructure *s;
GValue v = { 0, };
GValue *l;
guint i;
guchar *spect = spectrum->spect;
GST_DEBUG_OBJECT (spectrum, "preparing message, spect = %p, bands =%d ",
spect, spectrum->bands);
s = gst_structure_new ("spectrum", "endtime", GST_TYPE_CLOCK_TIME,
endtime, NULL);
g_value_init (&v, GST_TYPE_LIST);
/* will copy-by-value */
gst_structure_set_value (s, "spectrum", &v);
g_value_unset (&v);
g_value_init (&v, G_TYPE_UCHAR);
l = (GValue *) gst_structure_get_value (s, "spectrum");
for (i = 0; i < spectrum->bands; i++) {
g_value_set_uchar (&v, spect[i]);
gst_value_list_append_value (l, &v); /* copies by value */
}
g_value_unset (&v);
return gst_message_new_element (GST_OBJECT (spectrum), s);
}
static GstFlowReturn
gst_spectrum_transform_ip (GstBaseTransform * trans, GstBuffer * in)
{
GstSpectrum *spectrum = GST_SPECTRUM (trans);
gint16 *samples;
gint wanted;
gint i, j, k;
gint32 acc;
gfloat pos, step;
guchar *spect = spectrum->spect;
GstClockTime endtime = GST_BUFFER_TIMESTAMP (in);
GstClockTime blktime =
GST_FRAMES_TO_CLOCK_TIME (spectrum->len, spectrum->rate);
GST_LOG ("transform : %ld bytes", GST_BUFFER_SIZE (in));
gst_adapter_push (spectrum->adapter, gst_buffer_ref (in));
/* required number of bytes */
wanted = spectrum->channels * spectrum->len * sizeof (gint16);
/* FIXME: 4.0 was 2.0 before, but that include the mirrored spectrum */
step = (gfloat) spectrum->len / (spectrum->bands * 4.0);
while (gst_adapter_available (spectrum->adapter) > wanted) {
GST_LOG (" adapter loop");
samples = (gint16 *) gst_adapter_take (spectrum->adapter, wanted);
for (i = 0, j = 0; i < spectrum->len; i++) {
for (k = 0, acc = 0; k < spectrum->channels; k++)
acc += samples[j++];
spectrum->re[i] = (gint16) (acc / spectrum->channels);
}
GST_LOG (" fft");
gst_spectrum_window (spectrum->re, spectrum->len);
gst_spectrum_fix_fft (spectrum->re, spectrum->im, spectrum->base, FALSE);
gst_spectrum_fix_loud (spectrum->loud, spectrum->re, spectrum->im,
spectrum->len, 0);
GST_LOG (" resampling");
/* resample to requested number of bands */
for (i = 0, pos = 0.0; i < spectrum->bands; i++, pos += step) {
if (spectrum->loud[(gint) pos] > spectrum->threshold) {
spect[i] = spectrum->loud[(gint) pos] - spectrum->threshold;
/*
if (spect[i] > 15);
spect[i] = 15;
*/
} else
/* treat as silence */
spect[i] = 0;
}
GST_LOG (" send message?");
//ret = gst_pad_push (spectrum->srcpad, outbuf);
spectrum->num_frames += spectrum->len;
endtime += blktime;
/* do we need to message ? */
if (spectrum->num_frames >=
GST_CLOCK_TIME_TO_FRAMES (spectrum->interval, spectrum->rate)) {
if (spectrum->message) {
GstMessage *m = gst_spectrum_message_new (spectrum, endtime);
GST_LOG (" sending message");
gst_element_post_message (GST_ELEMENT (spectrum), m);
}
spectrum->num_frames = 0;
}
}
return GST_FLOW_OK;
}
/*
static GstStateChangeReturn
gst_spectrum_change_state (GstElement * element, GstStateChange transition)
{
GstSpectrum *spectrum = GST_SPECTRUM (element);
GstStateChangeReturn ret;
switch (transition) {
case GST_STATE_CHANGE_NULL_TO_READY:
break;
case GST_STATE_CHANGE_READY_TO_PAUSED:
gst_adapter_clear (spectrum->adapter);
break;
case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
break;
default:
break;
}
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
switch (transition) {
case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
break;
case GST_STATE_CHANGE_PAUSED_TO_READY:
break;
case GST_STATE_CHANGE_READY_TO_NULL:
break;
default:
break;
}
return ret;
}
*/
static gboolean
plugin_init (GstPlugin * plugin)
{
return gst_element_register (plugin, "spectrum", GST_RANK_NONE,
GST_TYPE_SPECTRUM);
}
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
GST_VERSION_MINOR,
"spectrum",
"Run an FFT on the audio signal, output spectrum data",
plugin_init, VERSION, GST_LICENSE, GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)