gst/equalizer/: Refactor plugin into a base class and a first subclass (nband eq). The nband eq uses GstChildProxy an...

Original commit message from CVS:
* gst/equalizer/Makefile.am:
* gst/equalizer/gstiirequalizer.c: (_do_init),
(gst_iir_equalizer_band_set_property),
(gst_iir_equalizer_band_get_property),
(gst_iir_equalizer_band_class_init),
(gst_iir_equalizer_band_get_type),
(gst_iir_equalizer_child_proxy_get_child_by_index),
(gst_iir_equalizer_child_proxy_get_children_count),
(gst_iir_equalizer_child_proxy_interface_init),
(gst_iir_equalizer_base_init), (gst_iir_equalizer_class_init),
(gst_iir_equalizer_finalize), (setup_filter),
(gst_iir_equalizer_compute_frequencies),
(gst_iir_equalizer_set_property), (gst_iir_equalizer_get_property),
(gst_iir_equalizer_setup), (plugin_init):
* gst/equalizer/gstiirequalizer.h:
* gst/equalizer/gstiirequalizernbands.c:
(gst_iir_equalizer_nbands_base_init),
(gst_iir_equalizer_nbands_class_init),
(gst_iir_equalizer_nbands_init),
(gst_iir_equalizer_nbands_set_property),
(gst_iir_equalizer_nbands_get_property):
* gst/equalizer/gstiirequalizernbands.h:
Refactor plugin into a base class and a first subclass (nband eq). The
nband eq uses GstChildProxy and is controlable. More subclasses will
follow.

1 files changed, 122 insertions, 0 deletions

diff --git a/gst/equalizer/gstiirequalizernbands.c b/gst/equalizer/gstiirequalizernbands.c
new file mode 100644
index 00000000..53d3c128
--- /dev/null
+++ b/gst/equalizer/gstiirequalizernbands.c
@@ -0,0 +1,122 @@
+/* GStreamer
+ * Copyright (C) <2004> Benjamin Otte <otte@gnome.org>
+ *               <2007> Stefan Kost <ensonic@users.sf.net>
+ *
+ * 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.
+ */
+
+/*
+ *
+ * gst-launch filesrc location=song.ogg ! oggdemux ! vorbisdec ! audioconvert ! equalizer-nbands rband5::gain=-1.0 ! alsasink
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include "gstiirequalizer.h"
+#include "gstiirequalizernbands.h"
+
+
+enum
+{
+  ARG_NUM_BANDS = 1
+};
+
+static void gst_iir_equalizer_nbands_set_property (GObject * object,
+    guint prop_id, const GValue * value, GParamSpec * pspec);
+static void gst_iir_equalizer_nbands_get_property (GObject * object,
+    guint prop_id, GValue * value, GParamSpec * pspec);
+
+GST_DEBUG_CATEGORY_EXTERN ()(equalizer_debug);
+#define GST_CAT_DEFAULT equalizer_debug
+
+GST_BOILERPLATE (GstIirEqualizerNBands, gst_iir_equalizer_nbands,
+    GstIirEqualizer, GST_TYPE_IIR_EQUALIZER);
+
+/* equalizer implementation */
+
+static void
+gst_iir_equalizer_nbands_base_init (gpointer g_class)
+{
+  GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
+  const GstElementDetails iir_equalizer_details =
+      GST_ELEMENT_DETAILS ("N Band Equalizer",
+      "Filter/Effect/Audio",
+      "Direct Form IIR equalizer",
+      "Benjamin Otte <otte@gnome.org>," " Stefan Kost <ensonic@user.sf.net>");
+
+  gst_element_class_set_details (element_class, &iir_equalizer_details);
+}
+
+static void
+gst_iir_equalizer_nbands_class_init (GstIirEqualizerNBandsClass * klass)
+{
+  GObjectClass *gobject_class = (GObjectClass *) klass;
+
+  gobject_class->set_property = gst_iir_equalizer_nbands_set_property;
+  gobject_class->get_property = gst_iir_equalizer_nbands_get_property;
+
+  g_object_class_install_property (gobject_class, ARG_NUM_BANDS,
+      g_param_spec_uint ("num-bands", "num-bands",
+          "number of different bands to use", 2, 64, 10,
+          G_PARAM_READWRITE | G_PARAM_CONSTRUCT));
+}
+
+static void
+gst_iir_equalizer_nbands_init (GstIirEqualizerNBands * equ_n,
+    GstIirEqualizerNBandsClass * g_class)
+{
+  GstIirEqualizer *equ = GST_IIR_EQUALIZER (equ_n);
+
+  gst_iir_equalizer_compute_frequencies (equ, 10);
+}
+
+static void
+gst_iir_equalizer_nbands_set_property (GObject * object, guint prop_id,
+    const GValue * value, GParamSpec * pspec)
+{
+  GstIirEqualizer *equ = GST_IIR_EQUALIZER (object);
+
+  GST_EQUALIZER_TRANSFORM_LOCK (equ);
+  GST_OBJECT_LOCK (equ);
+  switch (prop_id) {
+    case ARG_NUM_BANDS:
+      gst_iir_equalizer_compute_frequencies (equ, g_value_get_uint (value));
+      break;
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+      break;
+  }
+  GST_OBJECT_UNLOCK (equ);
+  GST_EQUALIZER_TRANSFORM_UNLOCK (equ);
+}
+
+static void
+gst_iir_equalizer_nbands_get_property (GObject * object, guint prop_id,
+    GValue * value, GParamSpec * pspec)
+{
+  GstIirEqualizer *equ = GST_IIR_EQUALIZER (object);
+
+  switch (prop_id) {
+    case ARG_NUM_BANDS:
+      g_value_set_uint (value, equ->freq_band_count);
+      break;
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+      break;
+  }
+}