Add audioiirfilter and audiofirfilter elements which allow generic IIR/FIR filters to be implemented by providing the...

Original commit message from CVS:
* configure.ac:
* gst/audiofx/Makefile.am:
* gst/audiofx/audiofirfilter.c: (gst_audio_fir_filter_base_init),
(gst_audio_fir_filter_class_init),
(gst_audio_fir_filter_update_kernel), (gst_audio_fir_filter_init),
(gst_audio_fir_filter_setup), (gst_audio_fir_filter_finalize),
(gst_audio_fir_filter_set_property),
(gst_audio_fir_filter_get_property):
* gst/audiofx/audiofirfilter.h:
* gst/audiofx/audiofx.c: (plugin_init):
* gst/audiofx/audioiirfilter.c: (gst_audio_iir_filter_base_init),
(gst_audio_iir_filter_class_init),
(gst_audio_iir_filter_update_coefficients),
(gst_audio_iir_filter_init), (gst_audio_iir_filter_setup),
(gst_audio_iir_filter_finalize),
(gst_audio_iir_filter_set_property),
(gst_audio_iir_filter_get_property):
* gst/audiofx/audioiirfilter.h:
Add audioiirfilter and audiofirfilter elements which allow
generic IIR/FIR filters to be implemented by providing the
filter coefficients. Fixes bug #567577.
* docs/plugins/Makefile.am:
* docs/plugins/gst-plugins-good-plugins-docs.sgml:
* docs/plugins/gst-plugins-good-plugins-sections.txt:
* docs/plugins/gst-plugins-good-plugins.args:
* docs/plugins/gst-plugins-good-plugins.hierarchy:
* docs/plugins/gst-plugins-good-plugins.signals:
* docs/plugins/inspect/plugin-alaw.xml:
* docs/plugins/inspect/plugin-audiofx.xml:
* docs/plugins/inspect/plugin-avi.xml:
* docs/plugins/inspect/plugin-flac.xml:
* docs/plugins/inspect/plugin-mulaw.xml:
* docs/plugins/inspect/plugin-video4linux2.xml:
* docs/plugins/inspect/plugin-wavparse.xml:
Add documentation for the audioiirfilter and audiofirfilter
elements.
* tests/check/Makefile.am:
* tests/check/elements/audiofirfilter.c: (on_message),
(on_rate_changed), (on_handoff), (GST_START_TEST),
(audiofirfilter_suite):
* tests/check/elements/audioiirfilter.c: (on_message),
(on_rate_changed), (on_handoff), (GST_START_TEST),
(audioiirfilter_suite):
* tests/examples/Makefile.am:
* tests/examples/audiofx/Makefile.am:
* tests/examples/audiofx/firfilter-example.c: (on_message),
(on_rate_changed), (main):
* tests/examples/audiofx/iirfilter-example.c: (on_message),
(on_rate_changed), (main):
Add unit tests and example applications for the two filter
elements.

1 files changed, 71 insertions, 0 deletions

diff --git a/gst/audiofx/audioiirfilter.h b/gst/audiofx/audioiirfilter.h
new file mode 100644
index 00000000..607edf27
--- /dev/null
+++ b/gst/audiofx/audioiirfilter.h
@@ -0,0 +1,71 @@
+/* 
+ * GStreamer
+ * Copyright (C) 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
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ * 
+ */
+
+#ifndef __GST_AUDIO_IIR_FILTER_H__
+#define __GST_AUDIO_IIR_FILTER_H__
+
+#include <gst/gst.h>
+#include <gst/audio/gstaudiofilter.h>
+
+#include "audiofxbaseiirfilter.h"
+
+G_BEGIN_DECLS
+
+#define GST_TYPE_AUDIO_IIR_FILTER \
+  (gst_audio_iir_filter_get_type())
+#define GST_AUDIO_IIR_FILTER(obj) \
+  (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_AUDIO_IIR_FILTER,GstAudioIIRFilter))
+#define GST_AUDIO_IIR_FILTER_CLASS(klass) \
+  (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_AUDIO_IIR_FILTER,GstAudioIIRFilterClass))
+#define GST_IS_AUDIO_IIR_FILTER(obj) \
+  (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_AUDIO_IIR_FILTER))
+#define GST_IS_AUDIO_IIR_FILTER_CLASS(klass) \
+  (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_AUDIO_IIR_FILTER))
+
+typedef struct _GstAudioIIRFilter GstAudioIIRFilter;
+typedef struct _GstAudioIIRFilterClass GstAudioIIRFilterClass;
+
+/**
+ * GstAudioIIRFilter:
+ *
+ * Opaque data structure.
+ */
+struct _GstAudioIIRFilter {
+  GstAudioFXBaseIIRFilter parent;
+
+  GValueArray *a, *b;
+
+  /* < private > */
+  GMutex *lock;
+  gint rate;
+};
+
+struct _GstAudioIIRFilterClass {
+  GstAudioFXBaseIIRFilterClass parent;
+
+  void (*rate_changed) (GstElement * element, gint rate);
+};
+
+GType gst_audio_iir_filter_get_type (void);
+
+G_END_DECLS
+
+#endif /* __GST_AUDIO_IIR_FILTER_H__ */