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Port GstSpectrum to GstAudioFilter and libgstfft, add support for int32, float and double, use floats for the message...

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Original commit message from CVS:
* configure.ac:
* gst/spectrum/Makefile.am:
* gst/spectrum/demo-audiotest.c: (draw_spectrum),
(message_handler), (main):
* gst/spectrum/demo-osssrc.c: (draw_spectrum), (message_handler):
* gst/spectrum/gstspectrum.c: (gst_spectrum_base_init),
(gst_spectrum_class_init), (gst_spectrum_init),
(gst_spectrum_dispose), (gst_spectrum_set_property),
(gst_spectrum_get_property), (gst_spectrum_start),
(gst_spectrum_setup), (gst_spectrum_message_new),
(gst_spectrum_transform_ip):
* gst/spectrum/gstspectrum.h:
Port GstSpectrum to GstAudioFilter and libgstfft, add support
for int32, float and double, use floats for the message contents,
average all FFTs done in one interval for better results, use
a better windowing function, allow posting the phase in the message
and actually do an FFT with the requested number of bands instead
of interpolating.
* tests/check/elements/spectrum.c: (GST_START_TEST),
(spectrum_suite):
Improve the units tests by checking for a 11025Hz sine wave
and add unit tests for all 4 supported sample types.
This commit is contained in:
Sebastian Dröge 2007-09-06 07:21:22 +00:00
parent c8af2199d3
commit f5a3e61e69
6 changed files with 752 additions and 162 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

4
gst/spectrum/Makefile.am
View file

@ -1,10 +1,10 @@
plugin_LTLIBRARIES = libgstspectrum.la
libgstspectrum_la_SOURCES = gstspectrum.c fix_fft.c
libgstspectrum_la_SOURCES = gstspectrum.c
libgstspectrum_la_CFLAGS = $(GST_PLUGINS_BASE_CFLAGS) $(GST_BASE_CFLAGS) \
$(GST_CFLAGS)
libgstspectrum_la_LIBADD = $(GST_PLUGINS_BASE_LIBS) $(GST_BASE_LIBS) $(GST_LIBS)
libgstspectrum_la_LIBADD = $(GST_PLUGINS_BASE_LIBS) $(GST_BASE_LIBS) $(GST_LIBS) -lgstaudio-$(GST_MAJORMINOR) -lgstfft-$(GST_MAJORMINOR) $(LIBM)
libgstspectrum_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS)
noinst_HEADERS = gstspectrum.h

468
gst/spectrum/gstspectrum.c
View file

@ -1,6 +1,7 @@
/* GStreamer
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
* <2006> Stefan Kost <ensonic@users.sf.net>
* <2007> Sebastian Dröge <slomo@circular-chaos.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
@ -37,18 +38,26 @@
* </listitem>
* <listitem>
* <para>
* #GstValueList of #guchar
* <classname>&quot;spectrum&quot;</classname>:
* #GstValueList of #gfloat
* <classname>&quot;magnitude&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>
* <listitem>
* <para>
* #GstValueList of #gfloat
* <classname>&quot;phase&quot;</classname>:
* the phase for each frequency band. The value is between -pi and pi.
* </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)
* Last reviewed on 2007-08-18 (0.10.5)
* </refsect2>
*/
@ -56,9 +65,18 @@
#include "config.h"
#endif
#include <string.h>
#include <stdlib.h>
#include <gst/audio/audio.h>
#include <gst/audio/gstaudiofilter.h>
#include <math.h>
#include "gstspectrum.h"
#include <gst/fft/gstfft.h>
#include <gst/fft/gstffts16.h>
#include <gst/fft/gstffts32.h>
#include <gst/fft/gstfftf32.h>
#include <gst/fft/gstfftf64.h>
GST_DEBUG_CATEGORY_STATIC (gst_spectrum_debug);
#define GST_CAT_DEFAULT gst_spectrum_debug
@ -68,32 +86,34 @@ 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>");
"Stefan Kost <ensonic@users.sf.net>, "
"Sebastian Dröge <slomo@circular-chaos.org>");
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")
);
#define ALLOWED_CAPS \
"audio/x-raw-int, " \
" width = (int) 16, " \
" depth = (int) 16, " \
" signed = (boolean) true, " \
" endianness = (int) BYTE_ORDER, " \
" rate = (int) [ 1, MAX ], " \
" channels = (int) [ 1, MAX ]; " \
"audio/x-raw-int, " \
" width = (int) 32, " \
" depth = (int) 32, " \
" signed = (boolean) true, " \
" endianness = (int) BYTE_ORDER, " \
" rate = (int) [ 1, MAX ], " \
" channels = (int) [ 1, MAX ]; " \
"audio/x-raw-float, " \
" width = (int) { 32, 64 }, " \
" endianness = (int) BYTE_ORDER, " \
" rate = (int) [ 1, MAX ], " \
" channels = (int) [ 1, MAX ]"
/* Spectrum properties */
#define DEFAULT_SIGNAL_SPECTRUM TRUE
#define DEFAULT_SIGNAL_MAGNITUDE TRUE
#define DEFAULT_SIGNAL_PHASE FALSE
#define DEFAULT_SIGNAL_INTERVAL (GST_SECOND / 10)
#define DEFAULT_BANDS 128
#define DEFAULT_THRESHOLD -60
@ -105,44 +125,46 @@ enum
{
PROP_0,
PROP_SIGNAL_SPECTRUM,
PROP_SIGNAL_MAGNITUDE,
PROP_SIGNAL_PHASE,
PROP_SIGNAL_INTERVAL,
PROP_BANDS,
PROP_THRESHOLD
};
GST_BOILERPLATE (GstSpectrum, gst_spectrum, GstBaseTransform,
GST_TYPE_BASE_TRANSFORM);
GST_BOILERPLATE (GstSpectrum, gst_spectrum, GstAudioFilter,
GST_TYPE_AUDIO_FILTER);
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_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);
static gboolean gst_spectrum_setup (GstAudioFilter * base,
GstRingBufferSpec * format);
#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 process_s16 (GstSpectrum * spectrum, const gint16 * samples);
static void process_s32 (GstSpectrum * spectrum, const gint32 * samples);
static void process_f32 (GstSpectrum * spectrum, const gfloat * samples);
static void process_f64 (GstSpectrum * spectrum, const gdouble * samples);
static void
gst_spectrum_base_init (gpointer g_class)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
GstCaps *caps;
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);
caps = gst_caps_from_string (ALLOWED_CAPS);
gst_audio_filter_class_add_pad_templates (GST_AUDIO_FILTER_CLASS (g_class),
caps);
gst_caps_unref (caps);
}
static void
@ -150,23 +172,35 @@ gst_spectrum_class_init (GstSpectrumClass * klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
GstBaseTransformClass *trans_class = GST_BASE_TRANSFORM_CLASS (klass);
GstAudioFilterClass *filter_class = GST_AUDIO_FILTER_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;
filter_class->setup = GST_DEBUG_FUNCPTR (gst_spectrum_setup);
g_object_class_install_property (gobject_class, PROP_SIGNAL_SPECTRUM,
g_param_spec_boolean ("message", "Message",
"Post a level message for each passed interval",
DEFAULT_SIGNAL_SPECTRUM, G_PARAM_READWRITE));
g_object_class_install_property (gobject_class, PROP_SIGNAL_MAGNITUDE,
g_param_spec_boolean ("message-magnitude", "Magnitude",
"Post the magnitude of the spectrum",
DEFAULT_SIGNAL_MAGNITUDE, G_PARAM_READWRITE));
g_object_class_install_property (gobject_class, PROP_SIGNAL_PHASE,
g_param_spec_boolean ("message-phase", "Phase",
"Post the phase of the spectrum",
DEFAULT_SIGNAL_PHASE, 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)",
@ -191,14 +225,14 @@ gst_spectrum_init (GstSpectrum * spectrum, GstSpectrumClass * g_class)
spectrum->adapter = gst_adapter_new ();
spectrum->message = DEFAULT_SIGNAL_SPECTRUM;
spectrum->message_magnitude = DEFAULT_SIGNAL_MAGNITUDE;
spectrum->message_phase = DEFAULT_SIGNAL_PHASE;
spectrum->interval = DEFAULT_SIGNAL_INTERVAL;
spectrum->bands = DEFAULT_BANDS;
spectrum->threshold = DEFAULT_THRESHOLD;
spectrum->loud = g_malloc (SPECTRUM_WINDOW_LEN * sizeof (gint16));
spectrum->im = g_malloc0 (SPECTRUM_WINDOW_LEN * sizeof (gint16));
spectrum->re = g_malloc0 (SPECTRUM_WINDOW_LEN * sizeof (gint16));
spectrum->spect = g_malloc (spectrum->bands * sizeof (guchar));
spectrum->spect_magnitude = g_new0 (gfloat, spectrum->bands);
spectrum->spect_phase = g_new0 (gfloat, spectrum->bands);
}
static void
@ -211,15 +245,20 @@ gst_spectrum_dispose (GObject * object)
spectrum->adapter = NULL;
}
g_free (spectrum->re);
g_free (spectrum->im);
g_free (spectrum->loud);
g_free (spectrum->spect);
g_free (spectrum->in);
if (spectrum->fft_free_func) {
spectrum->fft_free_func (spectrum->fft_ctx);
spectrum->fft_ctx = NULL;
spectrum->fft_free_func = NULL;
}
g_free (spectrum->freqdata);
g_free (spectrum->spect_magnitude);
g_free (spectrum->spect_phase);
spectrum->re = NULL;
spectrum->im = NULL;
spectrum->loud = NULL;
spectrum->spect = NULL;
spectrum->in = NULL;
spectrum->spect_magnitude = NULL;
spectrum->spect_phase = NULL;
spectrum->freqdata = NULL;
G_OBJECT_CLASS (parent_class)->dispose (object);
}
@ -234,17 +273,39 @@ gst_spectrum_set_property (GObject * object, guint prop_id,
case PROP_SIGNAL_SPECTRUM:
filter->message = g_value_get_boolean (value);
break;
case PROP_SIGNAL_MAGNITUDE:
filter->message_magnitude = g_value_get_boolean (value);
break;
case PROP_SIGNAL_PHASE:
filter->message_phase = g_value_get_boolean (value);
break;
case PROP_SIGNAL_INTERVAL:
filter->interval = g_value_get_uint64 (value);
break;
case PROP_BANDS:
GST_BASE_TRANSFORM_LOCK (filter);
filter->bands = g_value_get_uint (value);
g_free (filter->spect);
filter->spect = g_malloc (filter->bands * sizeof (guchar));
g_free (filter->spect_magnitude);
g_free (filter->spect_phase);
g_free (filter->in);
g_free (filter->freqdata);
if (filter->fft_free_func) {
filter->fft_free_func (filter->fft_ctx);
filter->fft_ctx = NULL;
filter->fft_free_func = NULL;
}
filter->in = NULL;
filter->freqdata = NULL;
filter->spect_magnitude = g_new0 (gfloat, filter->bands);
filter->spect_phase = g_new0 (gfloat, filter->bands);
filter->num_frames = 0;
filter->num_fft = 0;
GST_BASE_TRANSFORM_UNLOCK (filter);
GST_DEBUG_OBJECT (filter, "reallocation, spect = %p, bands =%d ",
filter->spect, filter->bands);
filter->spect_magnitude, filter->bands);
break;
case PROP_THRESHOLD:
filter->threshold = g_value_get_int (value);
@ -265,6 +326,12 @@ gst_spectrum_get_property (GObject * object, guint prop_id,
case PROP_SIGNAL_SPECTRUM:
g_value_set_boolean (value, filter->message);
break;
case PROP_SIGNAL_MAGNITUDE:
g_value_set_boolean (value, filter->message_magnitude);
break;
case PROP_SIGNAL_PHASE:
g_value_set_boolean (value, filter->message_phase);
break;
case PROP_SIGNAL_INTERVAL:
g_value_set_uint64 (value, filter->interval);
break;
@ -280,25 +347,17 @@ gst_spectrum_get_property (GObject * object, guint prop_id,
}
}
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;
filter->num_fft = 0;
if (filter->spect_magnitude)
memset (filter->spect_magnitude, filter->bands * sizeof (gfloat), 0);
if (filter->spect_phase)
memset (filter->spect_phase, filter->bands * sizeof (gfloat), 0);
gst_segment_init (&filter->segment, GST_FORMAT_UNDEFINED);
return TRUE;
@ -347,6 +406,41 @@ gst_spectrum_event (GstBaseTransform * trans, GstEvent * event)
return TRUE;
}
static gboolean
gst_spectrum_setup (GstAudioFilter * base, GstRingBufferSpec * format)
{
GstSpectrum *filter = GST_SPECTRUM (base);
if (filter->in) {
g_free (filter->in);
filter->in = NULL;
}
if (filter->fft_free_func) {
filter->fft_free_func (filter->fft_ctx);
filter->fft_ctx = NULL;
filter->fft_free_func = NULL;
}
if (filter->freqdata) {
g_free (filter->freqdata);
filter->freqdata = NULL;
}
if (format->type == GST_BUFTYPE_LINEAR && format->width == 32)
filter->process = (GstSpectrumProcessFunc) process_s32;
else if (format->type == GST_BUFTYPE_LINEAR && format->width == 16)
filter->process = (GstSpectrumProcessFunc) process_s16;
else if (format->type == GST_BUFTYPE_FLOAT && format->width == 64)
filter->process = (GstSpectrumProcessFunc) process_f64;
else if (format->type == GST_BUFTYPE_FLOAT && format->width == 32)
filter->process = (GstSpectrumProcessFunc) process_f32;
else
g_assert_not_reached ();
return TRUE;
}
static GstMessage *
gst_spectrum_message_new (GstSpectrum * spectrum, GstClockTime endtime)
{
@ -354,99 +448,231 @@ gst_spectrum_message_new (GstSpectrum * spectrum, GstClockTime endtime)
GValue v = { 0, };
GValue *l;
guint i;
guchar *spect = spectrum->spect;
gfloat *spect_magnitude = spectrum->spect_magnitude;
gfloat *spect_phase = spectrum->spect_phase;
GST_DEBUG_OBJECT (spectrum, "preparing message, spect = %p, bands =%d ",
spect, spectrum->bands);
spect_magnitude, 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);
if (spectrum->message_magnitude) {
g_value_init (&v, GST_TYPE_LIST);
/* will copy-by-value */
gst_structure_set_value (s, "magnitude", &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_init (&v, G_TYPE_FLOAT);
l = (GValue *) gst_structure_get_value (s, "magnitude");
for (i = 0; i < spectrum->bands; i++) {
g_value_set_float (&v, spect_magnitude[i]);
gst_value_list_append_value (l, &v); /* copies by value */
}
g_value_unset (&v);
}
if (spectrum->message_phase) {
g_value_init (&v, GST_TYPE_LIST);
/* will copy-by-value */
gst_structure_set_value (s, "phase", &v);
g_value_unset (&v);
g_value_init (&v, G_TYPE_FLOAT);
l = (GValue *) gst_structure_get_value (s, "phase");
for (i = 0; i < spectrum->bands; i++) {
g_value_set_float (&v, spect_phase[i]);
gst_value_list_append_value (l, &v); /* copies by value */
}
g_value_unset (&v);
}
g_value_unset (&v);
return gst_message_new_element (GST_OBJECT (spectrum), s);
}
#define DEFINE_PROCESS_FUNC_INT(width,next_width,max) \
static void \
process_s##width (GstSpectrum *spectrum, const gint##width *samples) \
{ \
gfloat *spect_magnitude = spectrum->spect_magnitude; \
gfloat *spect_phase = spectrum->spect_phase; \
gint channels = GST_AUDIO_FILTER (spectrum)->format.channels; \
gint i, j, k; \
gint##next_width acc; \
GstFFTS##width##Complex *freqdata; \
GstFFTS##width *ctx; \
gint##width *in; \
gint nfft = 2 * spectrum->bands - 2; \
\
if (!spectrum->in) \
spectrum->in = (guint8 *) g_new (gint##width, nfft); \
\
in = (gint##width *) spectrum->in; \
\
for (i = 0, j = 0; i < nfft; i++) { \
/* convert to mono */ \
for (k = 0, acc = 0; k < channels; k++) \
acc += samples[j++]; \
in[i] = (gint##width) (acc / channels); \
} \
\
if (!spectrum->fft_ctx) { \
spectrum->fft_ctx = gst_fft_s##width##_new (nfft, FALSE); \
spectrum->fft_free_func = (GstSpectrumFFTFreeFunc) gst_fft_s##width##_free; \
} \
ctx = spectrum->fft_ctx; \
\
gst_fft_s##width##_window (ctx, in, GST_FFT_WINDOW_HAMMING); \
\
if (!spectrum->freqdata) \
spectrum->freqdata = g_new (GstFFTS##width##Complex, spectrum->bands); \
\
freqdata = (GstFFTS##width##Complex *) spectrum->freqdata; \
\
gst_fft_s##width##_fft (ctx, in, freqdata); \
spectrum->num_fft++; \
\
/* Calculate magnitude in db */ \
for (i = 0; i < spectrum->bands; i++) { \
gdouble val = (gdouble) freqdata[i].r * (gdouble) freqdata[i].r \
+ (gdouble) freqdata[i].i * (gdouble) freqdata[i].i; \
val = sqrt (val); \
val = 20.0 * log10 (val / max); \
if (val > spectrum->threshold) \
val -= spectrum->threshold; \
else \
val = 0.0; \
spect_magnitude[i] += val; \
} \
\
/* Calculate phase */ \
for (i = 0; i < spectrum->bands; i++) \
spect_phase[i] += atan2 (freqdata[i].i, freqdata[i].r); \
\
}
DEFINE_PROCESS_FUNC_INT (16, 32, 32767.0);
DEFINE_PROCESS_FUNC_INT (32, 64, 2147483647.0);
#define DEFINE_PROCESS_FUNC_FLOAT(width,type) \
static void \
process_f##width (GstSpectrum *spectrum, const g##type *samples) \
{ \
gfloat *spect_magnitude = spectrum->spect_magnitude; \
gfloat *spect_phase = spectrum->spect_phase; \
gint channels = GST_AUDIO_FILTER (spectrum)->format.channels; \
gint i, j, k; \
g##type acc; \
GstFFTF##width##Complex *freqdata; \
GstFFTF##width *ctx; \
g##type *in; \
gint nfft = 2 * spectrum->bands - 2; \
\
if (!spectrum->in) \
spectrum->in = (guint8 *) g_new (g##type, nfft); \
\
in = (g##type *) spectrum->in; \
\
for (i = 0, j = 0; i < nfft; i++) { \
/* convert to mono */ \
for (k = 0, acc = 0; k < channels; k++) \
acc += samples[j++]; \
in[i] = (g##type) (acc / channels); \
if (abs (in[i]) > 1.0) \
g_assert_not_reached(); \
} \
\
if (!spectrum->fft_ctx) { \
spectrum->fft_ctx = gst_fft_f##width##_new (nfft, FALSE); \
spectrum->fft_free_func = (GstSpectrumFFTFreeFunc) gst_fft_f##width##_free; \
} \
ctx = spectrum->fft_ctx; \
\
gst_fft_f##width##_window (ctx, in, GST_FFT_WINDOW_HAMMING); \
\
if (!spectrum->freqdata) \
spectrum->freqdata = g_new (GstFFTF##width##Complex, spectrum->bands); \
\
freqdata = (GstFFTF##width##Complex *) spectrum->freqdata; \
\
gst_fft_f##width##_fft (ctx, in, freqdata); \
spectrum->num_fft++; \
\
/* Calculate magnitude in db */ \
for (i = 0; i < spectrum->bands; i++) { \
gdouble val = freqdata[i].r * freqdata[i].r + freqdata[i].i * freqdata[i].i; \
val = sqrt (val); \
val = 20.0 * log10 (val / nfft); \
if (val > spectrum->threshold) \
val -= spectrum->threshold; \
else \
val = 0.0; \
spect_magnitude[i] += val; \
} \
\
/* Calculate phase */ \
for (i = 0; i < spectrum->bands; i++) \
spect_phase[i] += atan2 (freqdata[i].i, freqdata[i].r); \
\
}
DEFINE_PROCESS_FUNC_FLOAT (32, float);
DEFINE_PROCESS_FUNC_FLOAT (64, double);
static GstFlowReturn
gst_spectrum_transform_ip (GstBaseTransform * trans, GstBuffer * in)
{
GstSpectrum *spectrum = GST_SPECTRUM (trans);
gint wanted;
gint i, j, k;
gint32 acc;
gfloat pos, step;
guchar *spect = spectrum->spect;
gint i;
gfloat *spect_magnitude = spectrum->spect_magnitude;
gfloat *spect_phase = spectrum->spect_phase;
gint rate = GST_AUDIO_FILTER (spectrum)->format.rate;
gint channels = GST_AUDIO_FILTER (spectrum)->format.channels;
gint width = GST_AUDIO_FILTER (spectrum)->format.width / 8;
gint nfft = 2 * spectrum->bands - 2;
GstClockTime endtime =
gst_segment_to_running_time (&spectrum->segment, GST_FORMAT_TIME,
GST_BUFFER_TIMESTAMP (in));
GstClockTime blktime =
GST_FRAMES_TO_CLOCK_TIME (SPECTRUM_WINDOW_LEN, spectrum->rate);
GstClockTime blktime = GST_FRAMES_TO_CLOCK_TIME (nfft, rate);
GST_LOG_OBJECT (spectrum, "input size: %d bytes", GST_BUFFER_SIZE (in));
/* can we do this nicer? */
gst_adapter_push (spectrum->adapter, gst_buffer_copy (in));
/* required number of bytes */
wanted = spectrum->channels * SPECTRUM_WINDOW_LEN * sizeof (gint16);
/* FIXME: 4.0 was 2.0 before, but that include the mirrored spectrum */
step = (gfloat) SPECTRUM_WINDOW_LEN / (spectrum->bands * 4.0);
wanted = channels * nfft * width;
while (gst_adapter_available (spectrum->adapter) >= wanted) {
const gint16 *samples;
const guint8 *samples;
samples = (const gint16 *) gst_adapter_peek (spectrum->adapter, wanted);
samples = gst_adapter_peek (spectrum->adapter, wanted);
/* the current fft code is gint16 based, so supporting other formats would
* not really benefit now */
for (i = 0, j = 0; i < SPECTRUM_WINDOW_LEN; i++) {
/* convert to mono */
for (k = 0, acc = 0; k < spectrum->channels; k++)
acc += samples[j++];
spectrum->re[i] = (gint16) (acc / spectrum->channels);
}
spectrum->process (spectrum, samples);
gst_spectrum_window (spectrum->re, SPECTRUM_WINDOW_LEN);
gst_spectrum_fix_fft (spectrum->re, spectrum->im, SPECTRUM_WINDOW_BASE,
FALSE);
gst_spectrum_fix_loud (spectrum->loud, spectrum->re, spectrum->im,
SPECTRUM_WINDOW_LEN, 0);
/* resample to requested number of bands and offset by threshold */
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;
}
spectrum->num_frames += SPECTRUM_WINDOW_LEN;
spectrum->num_frames += nfft;
endtime += blktime;
/* do we need to message ? */
if (spectrum->num_frames >=
GST_CLOCK_TIME_TO_FRAMES (spectrum->interval, spectrum->rate)) {
GST_CLOCK_TIME_TO_FRAMES (spectrum->interval, rate)) {
if (spectrum->message) {
GstMessage *m = gst_spectrum_message_new (spectrum, endtime);
GstMessage *m;
/* Calculate average */
for (i = 0; i < spectrum->bands; i++) {
spect_magnitude[i] /= spectrum->num_fft;
spect_phase[i] /= spectrum->num_fft;
}
m = gst_spectrum_message_new (spectrum, endtime);
gst_element_post_message (GST_ELEMENT (spectrum), m);
}
memset (spect_magnitude, spectrum->bands * sizeof (gfloat), 0);
memset (spect_phase, spectrum->bands * sizeof (gfloat), 0);
spectrum->num_frames = 0;
spectrum->num_fft = 0;
}
gst_adapter_flush (spectrum->adapter, wanted);

23
gst/spectrum/gstspectrum.h
View file

@ -25,6 +25,7 @@
#include <gst/gst.h>
#include <gst/base/gstadapter.h>
#include <gst/base/gstbasetransform.h>
#include <gst/audio/gstaudiofilter.h>
#ifdef __cplusplus
extern "C" {
@ -39,9 +40,11 @@ extern "C" {
typedef struct _GstSpectrum GstSpectrum;
typedef struct _GstSpectrumClass GstSpectrumClass;
typedef void (*GstSpectrumProcessFunc) (GstSpectrum *, const guint8 *);
typedef void (*GstSpectrumFFTFreeFunc) (void *);
struct _GstSpectrum {
GstBaseTransform element;
GstAudioFilter element;
GstPad *sinkpad,*srcpad;
GstAdapter *adapter;
@ -49,24 +52,28 @@ struct _GstSpectrum {
/* properties */
gboolean message; /* whether or not to post messages */
gboolean message_magnitude;
gboolean message_phase;
guint64 interval; /* how many seconds between emits */
guint bands; /* number of spectrum bands */
gint threshold; /* energy level treshold */
gint num_frames; /* frame count (1 sample per channel)
* since last emit */
gint num_fft; /* number of FFTs since last emit */
gint rate; /* caps variables */
gint channels;
/* <private> */
gint base, len;
gint16 *re, *im, *loud;
guchar *spect;
gfloat *spect_magnitude;
gfloat *spect_phase;
GstSpectrumProcessFunc process;
void *fft_ctx;
GstSpectrumFFTFreeFunc fft_free_func;
void *in;
void *freqdata;
};
struct _GstSpectrumClass {
GstBaseTransformClass parent_class;
GstAudioFilterClass parent_class;
};
GType gst_spectrum_get_type (void);

395
tests/check/elements/spectrum.c
View file

@ -33,15 +33,27 @@ gboolean have_eos = FALSE;
GstPad *mysrcpad, *mysinkpad;
#define SPECT_CAPS_TEMPLATE_STRING \
"audio/x-raw-int, " \
"rate = (int) [ 1, MAX ], " \
"channels = (int) [ 1, 8 ], " \
"endianness = (int) BYTE_ORDER, " \
"width = (int) {8, 16}, " \
"depth = (int) {8, 16}, " \
"signed = (boolean) true"
"audio/x-raw-int, " \
" width = (int) 16, " \
" depth = (int) 16, " \
" signed = (boolean) true, " \
" endianness = (int) BYTE_ORDER, " \
" rate = (int) [ 1, MAX ], " \
" channels = (int) [ 1, MAX ]; " \
"audio/x-raw-int, " \
" width = (int) 32, " \
" depth = (int) 32, " \
" signed = (boolean) true, " \
" endianness = (int) BYTE_ORDER, " \
" rate = (int) [ 1, MAX ], " \
" channels = (int) [ 1, MAX ]; " \
"audio/x-raw-float, " \
" width = (int) { 32, 64 }, " \
" endianness = (int) BYTE_ORDER, " \
" rate = (int) [ 1, MAX ], " \
" channels = (int) [ 1, MAX ]"
#define SPECT_CAPS_STRING \
#define SPECT_CAPS_STRING_S16 \
"audio/x-raw-int, " \
"rate = (int) 44100, " \
"channels = (int) 1, " \
@ -50,7 +62,30 @@ GstPad *mysrcpad, *mysinkpad;
"depth = (int) 16, " \
"signed = (boolean) true"
#define SPECT_BANDS 64
#define SPECT_CAPS_STRING_S32 \
"audio/x-raw-int, " \
"rate = (int) 44100, " \
"channels = (int) 1, " \
"endianness = (int) BYTE_ORDER, " \
"width = (int) 32, " \
"depth = (int) 32, " \
"signed = (boolean) true"
#define SPECT_CAPS_STRING_F32 \
"audio/x-raw-float, " \
" width = (int) 32, " \
" endianness = (int) BYTE_ORDER, " \
" rate = (int) 44100, " \
" channels = (int) 1"
#define SPECT_CAPS_STRING_F64 \
"audio/x-raw-float, " \
" width = (int) 64, " \
" endianness = (int) BYTE_ORDER, " \
" rate = (int) 44100, " \
" channels = (int) 1"
#define SPECT_BANDS 256
static GstStaticPadTemplate sinktemplate = GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
@ -104,24 +139,32 @@ GST_START_TEST (test_int16)
gint16 *data;
const GValue *list, *value;
GstClockTime endtime;
guchar level;
gfloat level;
spectrum = setup_spectrum ();
g_object_set (spectrum, "message", TRUE, "interval", GST_SECOND / 10,
g_object_set (spectrum, "message", TRUE, "interval", GST_SECOND / 100,
"bands", SPECT_BANDS, "threshold", -80, NULL);
fail_unless (gst_element_set_state (spectrum,
GST_STATE_PLAYING) == GST_STATE_CHANGE_SUCCESS,
"could not set to playing");
/* create a fake 1 sec buffer with a half-amplitude block signal */
/* create a 1 sec buffer with an 11025 Hz sine wave */
inbuffer = gst_buffer_new_and_alloc (44100 * sizeof (gint16));
data = (gint16 *) GST_BUFFER_DATA (inbuffer);
for (j = 0; j < 44100; ++j) {
*data = 16536;
for (j = 0; j < 44100; j += 4) {
*data = 0;
++data;
*data = 32767;
++data;
*data = 0;
++data;
*data = -32767;
++data;
}
caps = gst_caps_from_string (SPECT_CAPS_STRING);
caps = gst_caps_from_string (SPECT_CAPS_STRING_S16);
gst_buffer_set_caps (inbuffer, caps);
gst_caps_unref (caps);
ASSERT_BUFFER_REFCOUNT (inbuffer, "inbuffer", 1);
@ -152,13 +195,322 @@ GST_START_TEST (test_int16)
"spectrum");
fail_unless (gst_structure_get_clock_time (structure, "endtime", &endtime));
/* block wave of half amplitude has -5.94 dB for rms, peak and decay */
list = gst_structure_get_value (structure, "spectrum");
list = gst_structure_get_value (structure, "magnitude");
for (i = 0; i < SPECT_BANDS; ++i) {
value = gst_value_list_get_value (list, i);
level = g_value_get_uchar (value);
GST_DEBUG ("band[%3d] is %3d", i, level);
fail_if (level == 0);
level = g_value_get_float (value);
GST_DEBUG ("band[%3d] is %.2f", i, level);
/* Only the bands in the middle should have a level above 60 */
fail_if ((i == SPECT_BANDS / 2 || i == SPECT_BANDS / 2 - 1)
&& level < 60.0);
fail_if ((i != SPECT_BANDS / 2 && i != SPECT_BANDS / 2 - 1)
&& level > 60.0);
}
fail_unless_equals_int (g_list_length (buffers), 1);
fail_if ((outbuffer = (GstBuffer *) buffers->data) == NULL);
fail_unless (inbuffer == outbuffer);
/* clean up */
/* flush current messages,and future state change messages */
gst_bus_set_flushing (bus, TRUE);
/* message has a ref to the element */
ASSERT_OBJECT_REFCOUNT (spectrum, "spectrum", 2);
gst_message_unref (message);
ASSERT_OBJECT_REFCOUNT (spectrum, "spectrum", 1);
gst_element_set_bus (spectrum, NULL);
ASSERT_OBJECT_REFCOUNT (bus, "bus", 1);
gst_object_unref (bus);
gst_buffer_unref (outbuffer);
fail_unless (gst_element_set_state (spectrum,
GST_STATE_NULL) == GST_STATE_CHANGE_SUCCESS, "could not set to null");
ASSERT_OBJECT_REFCOUNT (spectrum, "spectrum", 1);
cleanup_spectrum (spectrum);
}
GST_END_TEST;
GST_START_TEST (test_int32)
{
GstElement *spectrum;
GstBuffer *inbuffer, *outbuffer;
GstBus *bus;
GstCaps *caps;
GstMessage *message;
const GstStructure *structure;
int i, j;
gint32 *data;
const GValue *list, *value;
GstClockTime endtime;
gfloat level;
spectrum = setup_spectrum ();
g_object_set (spectrum, "message", TRUE, "interval", GST_SECOND / 100,
"bands", SPECT_BANDS, "threshold", -80, NULL);
fail_unless (gst_element_set_state (spectrum,
GST_STATE_PLAYING) == GST_STATE_CHANGE_SUCCESS,
"could not set to playing");
/* create a 1 sec buffer with an 11025 Hz sine wave */
inbuffer = gst_buffer_new_and_alloc (44100 * sizeof (gint32));
data = (gint32 *) GST_BUFFER_DATA (inbuffer);
for (j = 0; j < 44100; j += 4) {
*data = 0;
++data;
*data = 2147483647;
++data;
*data = 0;
++data;
*data = -2147483647;
++data;
}
caps = gst_caps_from_string (SPECT_CAPS_STRING_S32);
gst_buffer_set_caps (inbuffer, caps);
gst_caps_unref (caps);
ASSERT_BUFFER_REFCOUNT (inbuffer, "inbuffer", 1);
/* create a bus to get the spectrum message on */
bus = gst_bus_new ();
ASSERT_OBJECT_REFCOUNT (bus, "bus", 1);
gst_element_set_bus (spectrum, bus);
ASSERT_OBJECT_REFCOUNT (bus, "bus", 2);
/* pushing gives away my reference ... */
fail_unless (gst_pad_push (mysrcpad, inbuffer) == GST_FLOW_OK);
/* ... but it ends up being collected on the global buffer list */
ASSERT_BUFFER_REFCOUNT (inbuffer, "inbuffer", 1);
fail_unless_equals_int (g_list_length (buffers), 1);
fail_if ((outbuffer = (GstBuffer *) buffers->data) == NULL);
fail_unless (inbuffer == outbuffer);
message = gst_bus_poll (bus, GST_MESSAGE_ELEMENT, -1);
ASSERT_OBJECT_REFCOUNT (message, "message", 1);
fail_unless (message != NULL);
fail_unless (GST_MESSAGE_SRC (message) == GST_OBJECT (spectrum));
fail_unless (GST_MESSAGE_TYPE (message) == GST_MESSAGE_ELEMENT);
structure = gst_message_get_structure (message);
fail_if (structure == NULL);
fail_unless_equals_string ((char *) gst_structure_get_name (structure),
"spectrum");
fail_unless (gst_structure_get_clock_time (structure, "endtime", &endtime));
list = gst_structure_get_value (structure, "magnitude");
for (i = 0; i < SPECT_BANDS; ++i) {
value = gst_value_list_get_value (list, i);
level = g_value_get_float (value);
GST_DEBUG ("band[%3d] is %.2f", i, level);
/* Only the bands in the middle should have a level above 60 */
fail_if ((i == SPECT_BANDS / 2 || i == SPECT_BANDS / 2 - 1)
&& level < 60.0);
fail_if ((i != SPECT_BANDS / 2 && i != SPECT_BANDS / 2 - 1)
&& level > 60.0);
}
fail_unless_equals_int (g_list_length (buffers), 1);
fail_if ((outbuffer = (GstBuffer *) buffers->data) == NULL);
fail_unless (inbuffer == outbuffer);
/* clean up */
/* flush current messages,and future state change messages */
gst_bus_set_flushing (bus, TRUE);
/* message has a ref to the element */
ASSERT_OBJECT_REFCOUNT (spectrum, "spectrum", 2);
gst_message_unref (message);
ASSERT_OBJECT_REFCOUNT (spectrum, "spectrum", 1);
gst_element_set_bus (spectrum, NULL);
ASSERT_OBJECT_REFCOUNT (bus, "bus", 1);
gst_object_unref (bus);
gst_buffer_unref (outbuffer);
fail_unless (gst_element_set_state (spectrum,
GST_STATE_NULL) == GST_STATE_CHANGE_SUCCESS, "could not set to null");
ASSERT_OBJECT_REFCOUNT (spectrum, "spectrum", 1);
cleanup_spectrum (spectrum);
}
GST_END_TEST;
GST_START_TEST (test_float32)
{
GstElement *spectrum;
GstBuffer *inbuffer, *outbuffer;
GstBus *bus;
GstCaps *caps;
GstMessage *message;
const GstStructure *structure;
int i, j;
gfloat *data;
const GValue *list, *value;
GstClockTime endtime;
gfloat level;
spectrum = setup_spectrum ();
g_object_set (spectrum, "message", TRUE, "interval", GST_SECOND / 100,
"bands", SPECT_BANDS, "threshold", -80, NULL);
fail_unless (gst_element_set_state (spectrum,
GST_STATE_PLAYING) == GST_STATE_CHANGE_SUCCESS,
"could not set to playing");
/* create a 1 sec buffer with an 11025 Hz sine wave */
inbuffer = gst_buffer_new_and_alloc (44100 * sizeof (gfloat));
data = (gfloat *) GST_BUFFER_DATA (inbuffer);
for (j = 0; j < 44100; j += 4) {
*data = 0.0;
++data;
*data = 1.0;
++data;
*data = 0.0;
++data;
*data = -1.0;
++data;
}
caps = gst_caps_from_string (SPECT_CAPS_STRING_F32);
gst_buffer_set_caps (inbuffer, caps);
gst_caps_unref (caps);
ASSERT_BUFFER_REFCOUNT (inbuffer, "inbuffer", 1);
/* create a bus to get the spectrum message on */
bus = gst_bus_new ();
ASSERT_OBJECT_REFCOUNT (bus, "bus", 1);
gst_element_set_bus (spectrum, bus);
ASSERT_OBJECT_REFCOUNT (bus, "bus", 2);
/* pushing gives away my reference ... */
fail_unless (gst_pad_push (mysrcpad, inbuffer) == GST_FLOW_OK);
/* ... but it ends up being collected on the global buffer list */
ASSERT_BUFFER_REFCOUNT (inbuffer, "inbuffer", 1);
fail_unless_equals_int (g_list_length (buffers), 1);
fail_if ((outbuffer = (GstBuffer *) buffers->data) == NULL);
fail_unless (inbuffer == outbuffer);
message = gst_bus_poll (bus, GST_MESSAGE_ELEMENT, -1);
ASSERT_OBJECT_REFCOUNT (message, "message", 1);
fail_unless (message != NULL);
fail_unless (GST_MESSAGE_SRC (message) == GST_OBJECT (spectrum));
fail_unless (GST_MESSAGE_TYPE (message) == GST_MESSAGE_ELEMENT);
structure = gst_message_get_structure (message);
fail_if (structure == NULL);
fail_unless_equals_string ((char *) gst_structure_get_name (structure),
"spectrum");
fail_unless (gst_structure_get_clock_time (structure, "endtime", &endtime));
list = gst_structure_get_value (structure, "magnitude");
for (i = 0; i < SPECT_BANDS; ++i) {
value = gst_value_list_get_value (list, i);
level = g_value_get_float (value);
GST_DEBUG ("band[%3d] is %.2f", i, level);
/* Only the bands in the middle should have a level above 60 */
fail_if ((i == SPECT_BANDS / 2 || i == SPECT_BANDS / 2 - 1)
&& level < 60.0);
fail_if ((i != SPECT_BANDS / 2 && i != SPECT_BANDS / 2 - 1)
&& level > 60.0);
}
fail_unless_equals_int (g_list_length (buffers), 1);
fail_if ((outbuffer = (GstBuffer *) buffers->data) == NULL);
fail_unless (inbuffer == outbuffer);
/* clean up */
/* flush current messages,and future state change messages */
gst_bus_set_flushing (bus, TRUE);
/* message has a ref to the element */
ASSERT_OBJECT_REFCOUNT (spectrum, "spectrum", 2);
gst_message_unref (message);
ASSERT_OBJECT_REFCOUNT (spectrum, "spectrum", 1);
gst_element_set_bus (spectrum, NULL);
ASSERT_OBJECT_REFCOUNT (bus, "bus", 1);
gst_object_unref (bus);
gst_buffer_unref (outbuffer);
fail_unless (gst_element_set_state (spectrum,
GST_STATE_NULL) == GST_STATE_CHANGE_SUCCESS, "could not set to null");
ASSERT_OBJECT_REFCOUNT (spectrum, "spectrum", 1);
cleanup_spectrum (spectrum);
}
GST_END_TEST;
GST_START_TEST (test_float64)
{
GstElement *spectrum;
GstBuffer *inbuffer, *outbuffer;
GstBus *bus;
GstCaps *caps;
GstMessage *message;
const GstStructure *structure;
int i, j;
gdouble *data;
const GValue *list, *value;
GstClockTime endtime;
gfloat level;
spectrum = setup_spectrum ();
g_object_set (spectrum, "message", TRUE, "interval", GST_SECOND / 100,
"bands", SPECT_BANDS, "threshold", -80, NULL);
fail_unless (gst_element_set_state (spectrum,
GST_STATE_PLAYING) == GST_STATE_CHANGE_SUCCESS,
"could not set to playing");
/* create a 1 sec buffer with an 11025 Hz sine wave */
inbuffer = gst_buffer_new_and_alloc (44100 * sizeof (gdouble));
data = (gdouble *) GST_BUFFER_DATA (inbuffer);
for (j = 0; j < 44100; j += 4) {
*data = 0.0;
++data;
*data = 1.0;
++data;
*data = 0.0;
++data;
*data = -1.0;
++data;
}
caps = gst_caps_from_string (SPECT_CAPS_STRING_F64);
gst_buffer_set_caps (inbuffer, caps);
gst_caps_unref (caps);
ASSERT_BUFFER_REFCOUNT (inbuffer, "inbuffer", 1);
/* create a bus to get the spectrum message on */
bus = gst_bus_new ();
ASSERT_OBJECT_REFCOUNT (bus, "bus", 1);
gst_element_set_bus (spectrum, bus);
ASSERT_OBJECT_REFCOUNT (bus, "bus", 2);
/* pushing gives away my reference ... */
fail_unless (gst_pad_push (mysrcpad, inbuffer) == GST_FLOW_OK);
/* ... but it ends up being collected on the global buffer list */
ASSERT_BUFFER_REFCOUNT (inbuffer, "inbuffer", 1);
fail_unless_equals_int (g_list_length (buffers), 1);
fail_if ((outbuffer = (GstBuffer *) buffers->data) == NULL);
fail_unless (inbuffer == outbuffer);
message = gst_bus_poll (bus, GST_MESSAGE_ELEMENT, -1);
ASSERT_OBJECT_REFCOUNT (message, "message", 1);
fail_unless (message != NULL);
fail_unless (GST_MESSAGE_SRC (message) == GST_OBJECT (spectrum));
fail_unless (GST_MESSAGE_TYPE (message) == GST_MESSAGE_ELEMENT);
structure = gst_message_get_structure (message);
fail_if (structure == NULL);
fail_unless_equals_string ((char *) gst_structure_get_name (structure),
"spectrum");
fail_unless (gst_structure_get_clock_time (structure, "endtime", &endtime));
list = gst_structure_get_value (structure, "magnitude");
for (i = 0; i < SPECT_BANDS; ++i) {
value = gst_value_list_get_value (list, i);
level = g_value_get_float (value);
GST_DEBUG ("band[%3d] is %.2f", i, level);
/* Only the bands in the middle should have a level above 60 */
fail_if ((i == SPECT_BANDS / 2 || i == SPECT_BANDS / 2 - 1)
&& level < 60.0);
fail_if ((i != SPECT_BANDS / 2 && i != SPECT_BANDS / 2 - 1)
&& level > 60.0);
}
fail_unless_equals_int (g_list_length (buffers), 1);
fail_if ((outbuffer = (GstBuffer *) buffers->data) == NULL);
@ -194,6 +546,9 @@ spectrum_suite (void)
suite_add_tcase (s, tc_chain);
tcase_add_test (tc_chain, test_int16);
tcase_add_test (tc_chain, test_int32);
tcase_add_test (tc_chain, test_float32);
tcase_add_test (tc_chain, test_float64);
return s;
}

16
tests/examples/spectrum/demo-audiotest.c
View file

@ -51,7 +51,7 @@ on_frequency_changed (GtkRange * range, gpointer user_data)
/* draw frequency spectrum as a bunch of bars */
static void
draw_spectrum (guchar * data)
draw_spectrum (gfloat * data)
{
gint i;
GdkRectangle rect = { 0, 0, SPECT_BANDS, 50 };
@ -78,15 +78,15 @@ message_handler (GstBus * bus, GstMessage * message, gpointer data)
const gchar *name = gst_structure_get_name (s);
if (strcmp (name, "spectrum") == 0) {
guchar spect[SPECT_BANDS];
gfloat spect[SPECT_BANDS];
const GValue *list;
const GValue *value;
guint i;
list = gst_structure_get_value (s, "spectrum");
list = gst_structure_get_value (s, "magnitude");
for (i = 0; i < SPECT_BANDS; ++i) {
value = gst_value_list_get_value (list, i);
spect[i] = g_value_get_uchar (value);
spect[i] = g_value_get_float (value);
}
draw_spectrum (spect);
}
@ -98,7 +98,7 @@ int
main (int argc, char *argv[])
{
GstElement *bin;
GstElement *src, *spectrum, *sink;
GstElement *src, *spectrum, *audioconvert, *sink;
GstBus *bus;
GtkWidget *appwindow, *vbox, *widget;
@ -116,10 +116,12 @@ main (int argc, char *argv[])
g_object_set (G_OBJECT (spectrum), "bands", SPECT_BANDS, "threshold", -80,
"message", TRUE, NULL);
audioconvert = gst_element_factory_make ("audioconvert", "audioconvert");
sink = gst_element_factory_make (DEFAULT_AUDIOSINK, "sink");
gst_bin_add_many (GST_BIN (bin), src, spectrum, sink, NULL);
if (!gst_element_link_many (src, spectrum, sink, NULL)) {
gst_bin_add_many (GST_BIN (bin), src, spectrum, audioconvert, sink, NULL);
if (!gst_element_link_many (src, spectrum, audioconvert, sink, NULL)) {
fprintf (stderr, "cant link elements\n");
exit (1);
}

8
tests/examples/spectrum/demo-osssrc.c
View file

@ -43,7 +43,7 @@ on_window_destroy (GtkObject * object, gpointer user_data)
/* draw frequency spectrum as a bunch of bars */
static void
draw_spectrum (guchar * data)
draw_spectrum (gfloat * data)
{
gint i;
GdkRectangle rect = { 0, 0, SPECT_WIDTH, SPECT_HEIGHT };
@ -70,15 +70,15 @@ message_handler (GstBus * bus, GstMessage * message, gpointer data)
const gchar *name = gst_structure_get_name (s);
if (strcmp (name, "spectrum") == 0) {
guchar spect[SPECT_BANDS];
gfloat spect[SPECT_BANDS];
const GValue *list;
const GValue *value;
guint i;
list = gst_structure_get_value (s, "spectrum");
list = gst_structure_get_value (s, "magnitude");
for (i = 0; i < SPECT_BANDS; ++i) {
value = gst_value_list_get_value (list, i);
spect[i] = g_value_get_uchar (value);
spect[i] = g_value_get_float (value);
}
draw_spectrum (spect);
}