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gst/equalizer/gstiirequalizer.*: Update the filter coefficients only when needed in the transform_ip function and cor...

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Original commit message from CVS:
* gst/equalizer/gstiirequalizer.c:
(gst_iir_equalizer_band_set_property), (gst_iir_equalizer_init),
(setup_filter), (set_passthrough), (update_coefficients),
(gst_iir_equalizer_compute_frequencies),
(gst_iir_equalizer_transform_ip):
* gst/equalizer/gstiirequalizer.h:
Update the filter coefficients only when needed in the transform_ip
function and correctly set the element into passthrough mode if the
gain of all bands is 0.
This commit is contained in:
Sebastian Dröge 2008-05-30 11:03:57 +00:00
parent 4ffab084be
commit c17d49ee20
3 changed files with 67 additions and 16 deletions
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12
ChangeLog
View file

@ -1,3 +1,15 @@
2008-05-30 Sebastian Dröge <slomo@circular-chaos.org>
* gst/equalizer/gstiirequalizer.c:
(gst_iir_equalizer_band_set_property), (gst_iir_equalizer_init),
(setup_filter), (set_passthrough), (update_coefficients),
(gst_iir_equalizer_compute_frequencies),
(gst_iir_equalizer_transform_ip):
* gst/equalizer/gstiirequalizer.h:
Update the filter coefficients only when needed in the transform_ip
function and correctly set the element into passthrough mode if the
gain of all bands is 0.
2008-05-29 Wim Taymans <wim.taymans@collabora.co.uk>
Based on patch by: Sebastian Keller <sebastian-keller at gmx dot de>

69
gst/equalizer/gstiirequalizer.c
View file

@ -120,8 +120,11 @@ struct _GstIirEqualizerBandClass
};
static GType gst_iir_equalizer_band_get_type (void);
static void setup_filter (GstIirEqualizer * equ, GstIirEqualizerBand * band);
static void set_passthrough (GstIirEqualizer * equ);
static void
gst_iir_equalizer_band_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
@ -138,10 +141,10 @@ gst_iir_equalizer_band_set_property (GObject * object, guint prop_id,
GstIirEqualizer *equ =
GST_IIR_EQUALIZER (gst_object_get_parent (GST_OBJECT (band)));
equ->need_new_coefficients = equ->need_new_coefficients ||
(band->gain != gain);
band->gain = gain;
if (GST_AUDIO_FILTER (equ)->format.rate) {
setup_filter (equ, band);
}
gst_object_unref (equ);
GST_DEBUG_OBJECT (band, "changed gain = %lf ", band->gain);
}
@ -156,10 +159,9 @@ gst_iir_equalizer_band_set_property (GObject * object, guint prop_id,
GstIirEqualizer *equ =
GST_IIR_EQUALIZER (gst_object_get_parent (GST_OBJECT (band)));
equ->need_new_coefficients = equ->need_new_coefficients ||
(band->freq != freq);
band->freq = freq;
if (GST_AUDIO_FILTER (equ)->format.rate) {
setup_filter (equ, band);
}
gst_object_unref (equ);
GST_DEBUG_OBJECT (band, "changed freq = %lf ", band->freq);
}
@ -174,10 +176,9 @@ gst_iir_equalizer_band_set_property (GObject * object, guint prop_id,
GstIirEqualizer *equ =
GST_IIR_EQUALIZER (gst_object_get_parent (GST_OBJECT (band)));
equ->need_new_coefficients = equ->need_new_coefficients ||
(band->width != width);
band->width = width;
if (GST_AUDIO_FILTER (equ)->format.rate) {
setup_filter (equ, band);
}
gst_object_unref (equ);
GST_DEBUG_OBJECT (band, "changed width = %lf ", band->width);
}
@ -310,6 +311,7 @@ static void
gst_iir_equalizer_base_init (gpointer g_class)
{
GstAudioFilterClass *audiofilter_class = GST_AUDIO_FILTER_CLASS (g_class);
GstCaps *caps;
caps = gst_caps_from_string (ALLOWED_CAPS);
@ -321,7 +323,9 @@ static void
gst_iir_equalizer_class_init (GstIirEqualizerClass * klass)
{
GstAudioFilterClass *audio_filter_class = (GstAudioFilterClass *) klass;
GstBaseTransformClass *btrans_class = (GstBaseTransformClass *) klass;
GObjectClass *gobject_class = (GObjectClass *) klass;
gobject_class->finalize = gst_iir_equalizer_finalize;
@ -333,13 +337,14 @@ gst_iir_equalizer_class_init (GstIirEqualizerClass * klass)
static void
gst_iir_equalizer_init (GstIirEqualizer * eq, GstIirEqualizerClass * g_class)
{
/* nothing to do here */
eq->need_new_coefficients = TRUE;
}
static void
gst_iir_equalizer_finalize (GObject * object)
{
GstIirEqualizer *equ = GST_IIR_EQUALIZER (object);
gint i;
for (i = 0; i < equ->freq_band_count; i++) {
@ -385,7 +390,9 @@ setup_filter (GstIirEqualizer * equ, GstIirEqualizerBand * band)
*/
{
gdouble gain, omega, bw;
gdouble edge_gain, gamma;
gdouble alpha, beta;
@ -414,6 +421,7 @@ setup_filter (GstIirEqualizer * equ, GstIirEqualizerBand * band)
band->a2 = 0.0;
band->b1 = 0.0;
band->b2 = 0.0;
gain = 1.0;
goto out;
} else {
bw = 2.0 * M_PI * (band->width / GST_AUDIO_FILTER (equ)->format.rate);
@ -439,11 +447,38 @@ setup_filter (GstIirEqualizer * equ, GstIirEqualizerBand * band)
}
}
static void
set_passthrough (GstIirEqualizer * equ)
{
gint i;
gboolean passthrough = TRUE;
for (i = 0; i < equ->freq_band_count; i++) {
passthrough = passthrough && (equ->bands[i]->gain == 0.0);
}
gst_base_transform_set_passthrough (GST_BASE_TRANSFORM (equ), passthrough);
GST_DEBUG ("Passthrough mode: %d\n", passthrough);
}
static void
update_coefficients (GstIirEqualizer * equ)
{
gint i;
for (i = 0; i < equ->freq_band_count; i++) {
setup_filter (equ, equ->bands[i]);
}
}
void
gst_iir_equalizer_compute_frequencies (GstIirEqualizer * equ, guint new_count)
{
guint old_count, i;
gdouble freq0, freq1, step;
gchar name[20];
old_count = equ->freq_band_count;
@ -503,12 +538,7 @@ gst_iir_equalizer_compute_frequencies (GstIirEqualizer * equ, guint new_count)
freq0 = freq1;
}
if (GST_AUDIO_FILTER (equ)->format.rate) {
for (i = 0; i < new_count; i++) {
setup_filter (equ, equ->bands[i]);
}
}
equ->need_new_coefficients = TRUE;
}
/* start of code that is type specific */
@ -572,7 +602,9 @@ static GstFlowReturn
gst_iir_equalizer_transform_ip (GstBaseTransform * btrans, GstBuffer * buf)
{
GstAudioFilter *filter = GST_AUDIO_FILTER (btrans);
GstIirEqualizer *equ = GST_IIR_EQUALIZER (btrans);
GstClockTime timestamp;
if (gst_base_transform_is_passthrough (btrans))
@ -581,6 +613,11 @@ gst_iir_equalizer_transform_ip (GstBaseTransform * btrans, GstBuffer * buf)
if (G_UNLIKELY (filter->format.channels < 1 || equ->process == NULL))
return GST_FLOW_NOT_NEGOTIATED;
if (equ->need_new_coefficients) {
update_coefficients (equ);
set_passthrough (equ);
}
timestamp = GST_BUFFER_TIMESTAMP (buf);
timestamp =
gst_segment_to_stream_time (&btrans->segment, GST_FORMAT_TIME, timestamp);

2
gst/equalizer/gstiirequalizer.h
View file

@ -60,6 +60,8 @@ struct _GstIirEqualizer
gpointer history;
guint history_size;
gboolean need_new_coefficients;
ProcessFunc process;
};