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gst/filter/gstbpwsinc.c: "this" is a C++ keyword, use "self" instead.

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Original commit message from CVS:
* gst/filter/gstbpwsinc.c: (gst_bpwsinc_dispose),
(gst_bpwsinc_init), (bpwsinc_setup), (bpwsinc_transform_ip),
(bpwsinc_set_property), (bpwsinc_get_property):
"this" is a C++ keyword, use "self" instead.
Add TODOs and FIXMEs and remove two wrong FIXMEs.
* gst/filter/gstlpwsinc.c:
Add FIXMEs and a new TODO.
This commit is contained in:
Sebastian Dröge 2007-08-09 19:23:33 +00:00
parent de3d1d62ab
commit ccb73e617b
2 changed files with 64 additions and 58 deletions
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113
gst/audiofx/audiowsincband.c
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@ -25,9 +25,14 @@
* chapter 16 * chapter 16
* available at http://www.dspguide.com/ * available at http://www.dspguide.com/
* *
* FIXME: * TODO: - Implement the convolution in place, probably only makes sense
* - this filter is totally unoptimized ! * when using FFT convolution as currently the convolution itself
* - this might be improved upon with bytestream * is probably the bottleneck
* - Implement a band reject mode (spectral inversion)
* - Allow choosing between different windows (blackman, hanning, ...)
* - Specify filter length instead of 2*N+1
* FIXME: - Doesn't work at all with >1 channels
* - Is bandreject, not bandpass
*/ */
#ifdef HAVE_CONFIG_H #ifdef HAVE_CONFIG_H
@ -96,16 +101,16 @@ static gboolean bpwsinc_setup (GstAudioFilter * base,
static void static void
gst_bpwsinc_dispose (GObject * object) gst_bpwsinc_dispose (GObject * object)
{ {
GstBPWSinc *this = GST_BPWSINC (object); GstBPWSinc *self = GST_BPWSINC (object);
if (this->residue) { if (self->residue) {
g_free (this->residue); g_free (self->residue);
this->residue = NULL; self->residue = NULL;
} }
if (this->kernel) { if (self->kernel) {
g_free (this->kernel); g_free (self->kernel);
this->kernel = NULL; self->kernel = NULL;
} }
G_OBJECT_CLASS (parent_class)->dispose (object); G_OBJECT_CLASS (parent_class)->dispose (object);
@ -156,13 +161,13 @@ gst_bpwsinc_class_init (GstBPWSincClass * klass)
} }
static void static void
gst_bpwsinc_init (GstBPWSinc * this, GstBPWSincClass * g_class) gst_bpwsinc_init (GstBPWSinc * self, GstBPWSincClass * g_class)
{ {
this->wing_size = 50; self->wing_size = 50;
this->lower_frequency = 0.25; self->lower_frequency = 0.25;
this->upper_frequency = 0.3; self->upper_frequency = 0.3;
this->kernel = NULL; self->kernel = NULL;
this->residue = NULL; self->residue = NULL;
} }
@ -176,28 +181,27 @@ bpwsinc_setup (GstAudioFilter * base, GstRingBufferSpec * format)
double sum = 0.0; double sum = 0.0;
int len = 0; int len = 0;
double *kernel_lp, *kernel_hp; double *kernel_lp, *kernel_hp;
GstBPWSinc *this = GST_BPWSINC (base); GstBPWSinc *self = GST_BPWSINC (base);
len = this->wing_size; len = self->wing_size;
/* fill the lp kernel /* fill the lp kernel
* FIXME: refactor to own function, this is not caps related * FIXME: refactor to own function, this is not caps related
*/ */
GST_DEBUG ("bpwsinc: initializing LP kernel of length %d with cut-off %f", GST_DEBUG ("bpwsinc: initializing LP kernel of length %d with cut-off %f",
len * 2 + 1, this->lower_frequency); len * 2 + 1, self->lower_frequency);
kernel_lp = (double *) g_malloc (sizeof (double) * (2 * len + 1)); kernel_lp = (double *) g_malloc (sizeof (double) * (2 * len + 1));
for (i = 0; i <= len * 2; ++i) { for (i = 0; i <= len * 2; ++i) {
if (i == len) if (i == len)
kernel_lp[i] = 2 * M_PI * this->lower_frequency; kernel_lp[i] = 2 * M_PI * self->lower_frequency;
else else
kernel_lp[i] = sin (2 * M_PI * this->lower_frequency * (i - len)) kernel_lp[i] = sin (2 * M_PI * self->lower_frequency * (i - len))
/ (i - len); / (i - len);
/* Blackman windowing */ /* Blackman windowing */
kernel_lp[i] *= (0.42 - 0.5 * cos (M_PI * i / len) kernel_lp[i] *= (0.42 - 0.5 * cos (M_PI * i / len)
+ 0.08 * cos (2 * M_PI * i / len)); + 0.08 * cos (2 * M_PI * i / len));
} }
/* normalize for unity gain at DC /* normalize for unity gain at DC */
* FIXME: sure this is not supposed to be quadratic ? */
sum = 0.0; sum = 0.0;
for (i = 0; i <= len * 2; ++i) for (i = 0; i <= len * 2; ++i)
sum += kernel_lp[i]; sum += kernel_lp[i];
@ -206,51 +210,50 @@ bpwsinc_setup (GstAudioFilter * base, GstRingBufferSpec * format)
/* fill the hp kernel */ /* fill the hp kernel */
GST_DEBUG ("bpwsinc: initializing HP kernel of length %d with cut-off %f", GST_DEBUG ("bpwsinc: initializing HP kernel of length %d with cut-off %f",
len * 2 + 1, this->upper_frequency); len * 2 + 1, self->upper_frequency);
kernel_hp = (double *) g_malloc (sizeof (double) * (2 * len + 1)); kernel_hp = (double *) g_malloc (sizeof (double) * (2 * len + 1));
for (i = 0; i <= len * 2; ++i) { for (i = 0; i <= len * 2; ++i) {
if (i == len) if (i == len)
kernel_hp[i] = 2 * M_PI * this->upper_frequency; kernel_hp[i] = 2 * M_PI * self->upper_frequency;
else else
kernel_hp[i] = sin (2 * M_PI * this->upper_frequency * (i - len)) kernel_hp[i] = sin (2 * M_PI * self->upper_frequency * (i - len))
/ (i - len); / (i - len);
/* Blackman windowing */ /* Blackman windowing */
kernel_hp[i] *= (0.42 - 0.5 * cos (M_PI * i / len) kernel_hp[i] *= (0.42 - 0.5 * cos (M_PI * i / len)
+ 0.08 * cos (2 * M_PI * i / len)); + 0.08 * cos (2 * M_PI * i / len));
} }
/* normalize for unity gain at DC /* normalize for unity gain at DC */
* FIXME: sure this is not supposed to be quadratic ? */
sum = 0.0; sum = 0.0;
for (i = 0; i <= len * 2; ++i) for (i = 0; i <= len * 2; ++i)
sum += kernel_hp[i]; sum += kernel_hp[i];
for (i = 0; i <= len * 2; ++i) for (i = 0; i <= len * 2; ++i)
kernel_hp[i] /= sum; kernel_hp[i] /= sum;
/* combine the two thiss */ /* combine the two kernels */
if (this->kernel) if (self->kernel)
g_free (this->kernel); g_free (self->kernel);
this->kernel = (double *) g_malloc (sizeof (double) * (2 * len + 1)); self->kernel = (double *) g_malloc (sizeof (double) * (2 * len + 1));
for (i = 0; i <= len * 2; ++i) for (i = 0; i <= len * 2; ++i)
this->kernel[i] = kernel_lp[i] + kernel_hp[i]; self->kernel[i] = kernel_lp[i] + kernel_hp[i];
/* do spectral inversion to go from band reject to bandpass */ /* do spectral inversion to go from band reject to bandpass */
for (i = 0; i <= len * 2; ++i) for (i = 0; i <= len * 2; ++i)
this->kernel[i] = -this->kernel[i]; self->kernel[i] = -self->kernel[i];
this->kernel[len] += 1; self->kernel[len] += 1;
/* free the helper kernels */ /* free the helper kernels */
g_free (kernel_lp); g_free (kernel_lp);
g_free (kernel_hp); g_free (kernel_hp);
/* set up the residue memory space */ /* set up the residue memory space */
if (this->residue) if (self->residue)
g_free (this->residue); g_free (self->residue);
this->residue = (gfloat *) g_malloc (sizeof (gfloat) * (len * 2 + 1)); self->residue = (gfloat *) g_malloc (sizeof (gfloat) * (len * 2 + 1));
for (i = 0; i <= len * 2; ++i) for (i = 0; i <= len * 2; ++i)
this->residue[i] = 0.0; self->residue[i] = 0.0;
return TRUE; return TRUE;
} }
@ -260,7 +263,7 @@ bpwsinc_setup (GstAudioFilter * base, GstRingBufferSpec * format)
static GstFlowReturn static GstFlowReturn
bpwsinc_transform_ip (GstBaseTransform * base, GstBuffer * outbuf) bpwsinc_transform_ip (GstBaseTransform * base, GstBuffer * outbuf)
{ {
GstBPWSinc *this = GST_BPWSINC (base); GstBPWSinc *self = GST_BPWSINC (base);
GstClockTime timestamp; GstClockTime timestamp;
gfloat *src; gfloat *src;
@ -278,28 +281,28 @@ bpwsinc_transform_ip (GstBaseTransform * base, GstBuffer * outbuf)
timestamp = GST_BUFFER_TIMESTAMP (outbuf); timestamp = GST_BUFFER_TIMESTAMP (outbuf);
if (GST_CLOCK_TIME_IS_VALID (timestamp)) if (GST_CLOCK_TIME_IS_VALID (timestamp))
gst_object_sync_values (G_OBJECT (this), timestamp); gst_object_sync_values (G_OBJECT (self), timestamp);
/* FIXME: out of laziness, we copy the left-over bit from last buffer /* 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 * together with the incoming buffer to a new buffer to make the loop
* easy; this could be a lot more optimized though * easy; self could be a lot more optimized though
* to make amends we keep the incoming buffer around and write our * to make amends we keep the incoming buffer around and write our
* output samples there */ * output samples there */
src = (gfloat *) GST_BUFFER_DATA (outbuf); src = (gfloat *) GST_BUFFER_DATA (outbuf);
residue_samples = this->wing_size * 2 + 1; residue_samples = self->wing_size * 2 + 1;
input_samples = GST_BUFFER_SIZE (outbuf) / sizeof (gfloat); input_samples = GST_BUFFER_SIZE (outbuf) / sizeof (gfloat);
total_samples = residue_samples + input_samples; total_samples = residue_samples + input_samples;
input = (gfloat *) g_malloc (sizeof (gfloat) * total_samples); input = (gfloat *) g_malloc (sizeof (gfloat) * total_samples);
/* copy the left-over bit */ /* copy the left-over bit */
memcpy (input, this->residue, sizeof (gfloat) * residue_samples); memcpy (input, self->residue, sizeof (gfloat) * residue_samples);
/* copy the new buffer */ /* copy the new buffer */
memcpy (&input[residue_samples], src, sizeof (gfloat) * input_samples); memcpy (&input[residue_samples], src, sizeof (gfloat) * input_samples);
/* copy the tail of the current input buffer to the residue */ /* copy the tail of the current input buffer to the residue */
memcpy (this->residue, &src[input_samples - residue_samples], memcpy (self->residue, &src[input_samples - residue_samples],
sizeof (gfloat) * residue_samples); sizeof (gfloat) * residue_samples);
/* convolution */ /* convolution */
@ -308,7 +311,7 @@ bpwsinc_transform_ip (GstBaseTransform * base, GstBuffer * outbuf)
for (i = 0; i < input_samples; ++i) { for (i = 0; i < input_samples; ++i) {
src[i] = 0.0; src[i] = 0.0;
for (j = 0; j < residue_samples; ++j) for (j = 0; j < residue_samples; ++j)
src[i] += input[i - j + residue_samples] * this->kernel[j]; src[i] += input[i - j + residue_samples] * self->kernel[j];
} }
g_free (input); g_free (input);
@ -320,19 +323,19 @@ static void
bpwsinc_set_property (GObject * object, guint prop_id, const GValue * value, bpwsinc_set_property (GObject * object, guint prop_id, const GValue * value,
GParamSpec * pspec) GParamSpec * pspec)
{ {
GstBPWSinc *this = GST_BPWSINC (object); GstBPWSinc *self = GST_BPWSINC (object);
g_return_if_fail (GST_IS_BPWSINC (this)); g_return_if_fail (GST_IS_BPWSINC (self));
switch (prop_id) { switch (prop_id) {
case PROP_LENGTH: case PROP_LENGTH:
this->wing_size = g_value_get_int (value); self->wing_size = g_value_get_int (value);
break; break;
case PROP_LOWER_FREQUENCY: case PROP_LOWER_FREQUENCY:
this->lower_frequency = g_value_get_double (value); self->lower_frequency = g_value_get_double (value);
break; break;
case PROP_UPPER_FREQUENCY: case PROP_UPPER_FREQUENCY:
this->upper_frequency = g_value_get_double (value); self->upper_frequency = g_value_get_double (value);
break; break;
default: default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
@ -344,17 +347,17 @@ static void
bpwsinc_get_property (GObject * object, guint prop_id, GValue * value, bpwsinc_get_property (GObject * object, guint prop_id, GValue * value,
GParamSpec * pspec) GParamSpec * pspec)
{ {
GstBPWSinc *this = GST_BPWSINC (object); GstBPWSinc *self = GST_BPWSINC (object);
switch (prop_id) { switch (prop_id) {
case PROP_LENGTH: case PROP_LENGTH:
g_value_set_int (value, this->wing_size); g_value_set_int (value, self->wing_size);
break; break;
case PROP_LOWER_FREQUENCY: case PROP_LOWER_FREQUENCY:
g_value_set_double (value, this->lower_frequency); g_value_set_double (value, self->lower_frequency);
break; break;
case PROP_UPPER_FREQUENCY: case PROP_UPPER_FREQUENCY:
g_value_set_double (value, this->upper_frequency); g_value_set_double (value, self->upper_frequency);
break; break;
default: default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);

9
gst/audiofx/audiowsinclimit.c
View File

@ -26,9 +26,12 @@
* chapter 16 * chapter 16
* available at http://www.dspguide.com/ * available at http://www.dspguide.com/
* *
* TODO: - Implement the convolution in place * TODO: - Implement the convolution in place, probably only makes sense
* - Implement a highpass mode (spectral inversion) * when using FFT convolution as currently the convolution itself
* - Allow choosing between different windows (blackman, hanning, ...) * is probably the bottleneck.
* - Implement a highpass mode (spectral inversion)
* - Allow choosing between different windows (blackman, hanning, ...)
* FIXME: - Doesn't work at all with >1 channels
*/ */
#ifdef HAVE_CONFIG_H #ifdef HAVE_CONFIG_H