gst/audiofx/: Implement a base class for generic audio FIR filters.

Original commit message from CVS:
* gst/audiofx/Makefile.am:
* gst/audiofx/audiofxbasefirfilter.c:
(gst_audio_fx_base_fir_filter_dispose),
(gst_audio_fx_base_fir_filter_base_init),
(gst_audio_fx_base_fir_filter_class_init),
(gst_audio_fx_base_fir_filter_init),
(gst_audio_fx_base_fir_filter_push_residue),
(gst_audio_fx_base_fir_filter_setup),
(gst_audio_fx_base_fir_filter_transform),
(gst_audio_fx_base_fir_filter_start),
(gst_audio_fx_base_fir_filter_stop),
(gst_audio_fx_base_fir_filter_query),
(gst_audio_fx_base_fir_filter_query_type),
(gst_audio_fx_base_fir_filter_event),
(gst_audio_fx_base_fir_filter_set_kernel):
* gst/audiofx/audiofxbasefirfilter.h:
* gst/audiofx/audiofxbaseiirfilter.c:
Implement a base class for generic audio FIR filters.
* gst/audiofx/audiowsincband.c:
(gst_gst_audio_wsincband_mode_get_type),
(gst_gst_audio_wsincband_window_get_type),
(gst_audio_wsincband_base_init), (gst_audio_wsincband_class_init),
(gst_audio_wsincband_init), (gst_audio_wsincband_build_kernel),
(gst_audio_wsincband_setup), (gst_audio_wsincband_set_property),
(gst_audio_wsincband_get_property):
* gst/audiofx/audiowsincband.h:
* gst/audiofx/audiowsinclimit.c:
(gst_audio_wsinclimit_mode_get_type),
(gst_audio_wsinclimit_window_get_type),
(gst_audio_wsinclimit_base_init),
(gst_audio_wsinclimit_class_init), (gst_audio_wsinclimit_init),
(gst_audio_wsinclimit_build_kernel), (gst_audio_wsinclimit_setup),
(gst_audio_wsinclimit_set_property),
(gst_audio_wsinclimit_get_property):
* gst/audiofx/audiowsinclimit.h:
* tests/check/elements/audiowsincband.c: (GST_START_TEST):
* tests/check/elements/audiowsinclimit.c: (GST_START_TEST):
Use this new base class for audiowsincband and audiowsinclimit.
Also cleanup both elements.

1 files changed, 8 insertions, 17 deletions

diff --git a/gst/audiofx/audiowsinclimit.h b/gst/audiofx/audiowsinclimit.h
index b781a422..d30b3938 100644
--- a/gst/audiofx/audiowsinclimit.h
+++ b/gst/audiofx/audiowsinclimit.h
@@ -3,6 +3,7 @@
  * GStreamer
  * Copyright (C) 1999-2001 Erik Walthinsen <omega@cse.ogi.edu>
  *               2006 Dreamlab Technologies Ltd. <mathis.hofer@dreamlab.net>
+ *               2007-2009 Sebastian Dröge <sebastian.droege@collabora.co.uk>
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
@@ -33,10 +34,12 @@
 #include <gst/gst.h>
 #include <gst/audio/gstaudiofilter.h>
 
+#include "audiofxbasefirfilter.h"
+
 G_BEGIN_DECLS
 
 #define GST_TYPE_AUDIO_WSINC_LIMIT \
-  (audio_wsinclimit_get_type())
+  (gst_audio_wsinclimit_get_type())
 #define GST_AUDIO_WSINC_LIMIT(obj) \
   (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_AUDIO_WSINC_LIMIT,GstAudioWSincLimit))
 #define GST_AUDIO_WSINC_LIMIT_CLASS(klass) \
@@ -49,38 +52,26 @@ G_BEGIN_DECLS
 typedef struct _GstAudioWSincLimit GstAudioWSincLimit;
 typedef struct _GstAudioWSincLimitClass GstAudioWSincLimitClass;
 
-typedef void (*GstAudioWSincLimitProcessFunc) (GstAudioWSincLimit *, guint8 *, guint8 *, guint);
-
 /**
  * GstAudioWSincLimit:
  *
  * Opaque data structure.
  */
 struct _GstAudioWSincLimit {
-  GstAudioFilter element;
+  GstAudioFXBaseFIRFilter parent;
 
   /* < private > */
-  GstAudioWSincLimitProcessFunc process;
-
   gint mode;
   gint window;
   gfloat cutoff;
-  gint kernel_length;           /* length of the filter kernel */
-
-  gdouble *residue;             /* buffer for left-over samples from previous buffer */
-  gdouble *kernel;              /* filter kernel */
-  gboolean have_kernel;
-  gint residue_length;
-  guint64 latency;
-  GstClockTime next_ts;
-  guint64 next_off;
+  gint kernel_length;
 };
 
 struct _GstAudioWSincLimitClass {
-  GstAudioFilterClass parent_class;
+  GstAudioFXBaseFIRFilterClass parent;
 };
 
-GType audio_wsinclimit_get_type (void);
+GType gst_audio_wsinclimit_get_type (void);
 
 G_END_DECLS