gst/filter/gstlpwsinc.*: Add double support, replace "this" with "self" as the former is a C++ keyword.

Original commit message from CVS:
* gst/filter/gstlpwsinc.c: (gst_lpwsinc_dispose),
(gst_lpwsinc_class_init), (gst_lpwsinc_init), (process_32),
(process_64), (lpwsinc_build_kernel), (lpwsinc_setup),
(lpwsinc_get_unit_size), (lpwsinc_transform),
(lpwsinc_set_property), (lpwsinc_get_property):
* gst/filter/gstlpwsinc.h:
Add double support, replace "this" with "self" as the former
is a C++ keyword.
Implement the frequency property in Hz instead of fraction
of sampling frequency.
Remove some unecessary FIXMEs and add some TODOs, add some
required locking and refactor the kernel generation into a
separate function that is also called when the properties
change now.
And use BaseTransform::transform instead of transform_ip
as the convolution is done out of place anyway. Should
be done in place later.

1 files changed, 8 insertions, 5 deletions

diff --git a/gst/filter/gstlpwsinc.h b/gst/filter/gstlpwsinc.h
index 14791b51..afb7e9c7 100644
--- a/gst/filter/gstlpwsinc.h
+++ b/gst/filter/gstlpwsinc.h
@@ -54,6 +54,8 @@ G_BEGIN_DECLS
 typedef struct _GstLPWSinc GstLPWSinc;
 typedef struct _GstLPWSincClass GstLPWSincClass;
 
+typedef void (*GstLPWSincProcessFunc) (GstLPWSinc *, guint8 *, guint8 *, guint);
+
 /**
  * GstLPWSinc:
  *
@@ -62,14 +64,15 @@ typedef struct _GstLPWSincClass GstLPWSincClass;
 struct _GstLPWSinc {
   GstAudioFilter element;
 
-  void (*process)(GstLPWSinc*, gpointer, gint);
+  GstLPWSincProcessFunc process;
 
-  double frequency;
-  int wing_size;                /* length of a "wing" of the filter; 
+  gdouble frequency;
+  gint wing_size;               /* length of a "wing" of the filter; 
                                    actual length is 2 * wing_size + 1 */
 
-  gfloat *residue;              /* buffer for left-over samples from previous buffer */
-  double *kernel;
+  gdouble *residue;             /* buffer for left-over samples from previous buffer */
+  gdouble *kernel;              /* filter kernel */
+  gboolean have_kernel;
 };
 
 struct _GstLPWSincClass {