gst/interleave/: Split definitions into separate header files for better documentation generation.

Original commit message from CVS:
* gst/interleave/Makefile.am:
* gst/interleave/deinterleave.h:
* gst/interleave/interleave.h:
* gst/interleave/plugin.h:
Split definitions into separate header files for better documentation
generation.
* gst/interleave/deinterleave.c: (gst_deinterleave_base_init),
(gst_deinterleave_class_init), (gst_deinterleave_sink_setcaps),
(gst_deinterleave_process):
Don't use alloca, allow caps changes as long as the number of channels
does not change, don't use g_warning, return NOT_NEGOTIATED as early
as possible and some other cleanup.
* gst/interleave/interleave.c: (gst_interleave_base_init),
(gst_interleave_class_init):
Do some random cleanup.
* tests/check/Makefile.am:
* tests/check/elements/deinterleave.c: (GST_START_TEST),
(deinterleave_chain_func), (deinterleave_pad_added),
(deinterleave_suite):
Add unit tests for the deinterleave element.

7 files changed, 567 insertions, 120 deletions

diff --git a/gst/interleave/Makefile.am b/gst/interleave/Makefile.am
index 9a09cdbc..62e7f3e3 100644
--- a/gst/interleave/Makefile.am
+++ b/gst/interleave/Makefile.am
@@ -6,4 +6,4 @@ libgstinterleave_la_CFLAGS = $(GST_CFLAGS)
 libgstinterleave_la_LIBADD = $(GST_LIBS)
 libgstinterleave_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS)
 
-noinst_HEADERS = plugin.h
+noinst_HEADERS = plugin.h interleave.h deinterleave.h
diff --git a/gst/interleave/deinterleave.c b/gst/interleave/deinterleave.c
index f2e79777..743eb9f5 100644
--- a/gst/interleave/deinterleave.c
+++ b/gst/interleave/deinterleave.c
@@ -3,6 +3,7 @@
  *                    2000 Wim Taymans <wtay@chello.be>
  *                    2005 Wim Taymans <wim@fluendo.com>
  *                    2007 Andy Wingo <wingo at pobox.com>
+ *                    2008 Sebastian Dröge <slomo@circular-chaos.org>
  *
  * deinterleave.c: deinterleave samples, based on interleave.c
  *
@@ -22,48 +23,16 @@
  * Boston, MA 02111-1307, USA.
  */
 
-
 #ifdef HAVE_CONFIG_H
 #  include "config.h"
 #endif
 
 #include <gst/gst.h>
-
-
-#define GST_TYPE_DEINTERLEAVE            (gst_deinterleave_get_type())
-#define GST_DEINTERLEAVE(obj)            (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_DEINTERLEAVE,GstDeinterleave))
-#define GST_DEINTERLEAVE_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_DEINTERLEAVE,GstDeinterleaveClass))
-#define GST_DEINTERLEAVE_GET_CLASS(obj) \
-        (G_TYPE_INSTANCE_GET_CLASS ((obj),GST_TYPE_DEINTERLEAVE,GstDeinterleaveClass))
-#define GST_IS_DEINTERLEAVE(obj)         (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_DEINTERLEAVE))
-#define GST_IS_DEINTERLEAVE_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_DEINTERLEAVE))
-
-typedef struct _GstDeinterleave GstDeinterleave;
-typedef struct _GstDeinterleaveClass GstDeinterleaveClass;
-
-
-struct _GstDeinterleave
-{
-  GstElement element;
-
-  /*< private > */
-  GList *srcpads;
-  GstCaps *sinkcaps;
-  gint channels;
-
-  GstPad *sink;
-};
-
-struct _GstDeinterleaveClass
-{
-  GstElementClass parent_class;
-};
-
+#include "deinterleave.h"
 
 GST_DEBUG_CATEGORY_STATIC (gst_deinterleave_debug);
 #define GST_CAT_DEFAULT gst_deinterleave_debug
 
-
 static GstStaticPadTemplate src_template = GST_STATIC_PAD_TEMPLATE ("src%d",
     GST_PAD_SRC,
     GST_PAD_SOMETIMES,
@@ -85,26 +54,18 @@ static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink",
 GST_BOILERPLATE (GstDeinterleave, gst_deinterleave, GstElement,
     GST_TYPE_ELEMENT);
 
-
 static GstFlowReturn gst_deinterleave_chain (GstPad * pad, GstBuffer * buffer);
 static gboolean gst_deinterleave_sink_setcaps (GstPad * pad, GstCaps * caps);
 static gboolean gst_deinterleave_sink_activate_push (GstPad * pad,
     gboolean active);
 
-
-static const GstElementDetails details =
-GST_ELEMENT_DETAILS ("Audio deinterleaver",
-    "Filter/Converter/Audio",
-    "Splits one interleaved multichannel audio stream into many mono audio streams",
-    "Andy Wingo <wingo at pobox.com>, " "Iain <iain@prettypeople.org>");
-
 static void
 gst_deinterleave_base_init (gpointer g_class)
 {
-  GST_DEBUG_CATEGORY_INIT (gst_deinterleave_debug, "interleave", 0,
-      "interleave element");
-
-  gst_element_class_set_details (g_class, &details);
+  gst_element_class_set_details_simple (g_class, "Audio deinterleaver",
+      "Filter/Converter/Audio",
+      "Splits one interleaved multichannel audio stream into many mono audio streams",
+      "Andy Wingo <wingo at pobox.com>, " "Iain <iain@prettypeople.org>");
 
   gst_element_class_add_pad_template (g_class,
       gst_static_pad_template_get (&sink_template));
@@ -115,7 +76,8 @@ gst_deinterleave_base_init (gpointer g_class)
 static void
 gst_deinterleave_class_init (GstDeinterleaveClass * klass)
 {
-  /* pass */
+  GST_DEBUG_CATEGORY_INIT (gst_deinterleave_debug, "deinterleave", 0,
+      "deinterleave element");
 }
 
 static void
@@ -179,20 +141,47 @@ static gboolean
 gst_deinterleave_sink_setcaps (GstPad * pad, GstCaps * caps)
 {
   GstDeinterleave *self;
+  GstCaps *srccaps;
+  GstStructure *s;
 
   self = GST_DEINTERLEAVE (gst_pad_get_parent (pad));
 
   if (self->sinkcaps && !gst_caps_is_equal (caps, self->sinkcaps)) {
-    goto cannot_change_caps_dog;
-  } else {
+    GList *l;
+    gint new_channels;
+
+    if (!caps)
+      goto cannot_change_caps;
+
+    s = gst_caps_get_structure (caps, 0);
+
+    /* We allow caps changes as long as the number of channels doesn't change */
+    if (!gst_structure_get_int (s, "channels", &new_channels) ||
+        new_channels != self->channels)
+      goto cannot_change_caps;
+
     GST_DEBUG_OBJECT (self, "got caps: %" GST_PTR_FORMAT, caps);
     gst_caps_replace (&self->sinkcaps, caps);
-  }
 
-  {
-    GstCaps *srccaps;
-    GstStructure *s;
+    /* Set new caps on all srcpads */
+    srccaps = gst_caps_copy (caps);
+    s = gst_caps_get_structure (srccaps, 0);
+    gst_structure_set (s, "channels", G_TYPE_INT, 1, NULL);
+    gst_structure_remove_field (s, "channel-positions");
 
+    for (l = self->srcpads; l; l = l->next) {
+      GstPad *pad = GST_PAD (l->data);
+
+      if (!gst_pad_set_caps (pad, srccaps))
+        goto cannot_change_caps;
+    }
+
+    gst_caps_unref (srccaps);
+  } else {
+    GST_DEBUG_OBJECT (self, "got caps: %" GST_PTR_FORMAT, caps);
+    gst_caps_replace (&self->sinkcaps, caps);
+
+    /* Add all srcpads */
     srccaps = gst_caps_copy (caps);
     s = gst_caps_get_structure (srccaps, 0);
     if (!gst_structure_get_int (s, "channels", &self->channels))
@@ -207,14 +196,15 @@ gst_deinterleave_sink_setcaps (GstPad * pad, GstCaps * caps)
 
   return TRUE;
 
-cannot_change_caps_dog:
+cannot_change_caps:
   {
+    GST_ERROR_OBJECT (self, "can't set new caps: %" GST_PTR_FORMAT, caps);
     gst_object_unref (self);
     return FALSE;
   }
 no_channels:
   {
-    g_warning ("yarr, shiver me timbers");
+    GST_ERROR_OBJECT (self, "invalid caps");
     gst_object_unref (self);
     return FALSE;
   }
@@ -225,37 +215,45 @@ gst_deinterleave_process (GstDeinterleave * self, GstBuffer * buf)
 {
   GstFlowReturn ret = GST_FLOW_OK;      /* initialized to silence a warning */
   GList *srcs;
-  guint bufsize, i, j, channels, pads_pushed, nframes;
+  guint bufsize, i, j, channels, pads_pushed, buffers_allocated, nframes;
   GstBuffer **buffers_out;
   gfloat *in, *out;
 
   channels = self->channels;
-  buffers_out = g_alloca (sizeof (GstBuffer *) * channels);
+  buffers_out = g_new0 (GstBuffer *, channels);
   nframes = GST_BUFFER_SIZE (buf) / channels / sizeof (gfloat);
   bufsize = nframes * sizeof (gfloat);
   pads_pushed = 0;
+  buffers_allocated = 0;
 
-  for (i = 0; i < channels; i++)
-    buffers_out[i] = NULL;
-
+  /* Allocate buffers */
   for (srcs = self->srcpads, i = 0; srcs; srcs = srcs->next, i++) {
     GstPad *pad = (GstPad *) srcs->data;
 
     buffers_out[i] = NULL;
-    ret = gst_pad_alloc_buffer (pad, -1, bufsize, GST_PAD_CAPS (pad),
-        &buffers_out[i]);
+    ret =
+        gst_pad_alloc_buffer (pad, GST_BUFFER_OFFSET_NONE, bufsize,
+        GST_PAD_CAPS (pad), &buffers_out[i]);
 
     if (ret != GST_FLOW_OK && ret != GST_FLOW_NOT_LINKED)
       goto alloc_buffer_failed;
     if (buffers_out[i] && GST_BUFFER_SIZE (buffers_out[i]) != bufsize)
       goto alloc_buffer_bad_size;
 
-    if (buffers_out[i])
+    if (buffers_out[i]) {
       gst_buffer_copy_metadata (buffers_out[i], buf,
-          GST_BUFFER_COPY_TIMESTAMPS);
+          GST_BUFFER_COPY_TIMESTAMPS | GST_BUFFER_COPY_FLAGS);
+      buffers_allocated++;
+    }
+  }
+
+  /* Return NOT_LINKED if we couldn't allocate any buffers */
+  if (!buffers_allocated) {
+    ret = GST_FLOW_NOT_LINKED;
+    goto done;
   }
 
-  /* do the thing */
+  /* deinterleave */
   for (srcs = self->srcpads, i = 0; srcs; srcs = srcs->next, i++) {
     GstPad *pad = (GstPad *) srcs->data;
 
@@ -263,8 +261,8 @@ gst_deinterleave_process (GstDeinterleave * self, GstBuffer * buf)
     in += i;                    /* gfloat * arith */
     if (buffers_out[i]) {
       out = (gfloat *) GST_BUFFER_DATA (buffers_out[i]);
-      for (j = 0; j < nframes; j++)
-        out[j] = in[j * channels];
+      for (j = 0; j < nframes * channels; j += channels)
+        *out++ = in[j];
 
       ret = gst_pad_push (pad, buffers_out[i]);
       buffers_out[i] = NULL;
@@ -280,7 +278,9 @@ gst_deinterleave_process (GstDeinterleave * self, GstBuffer * buf)
   if (!pads_pushed)
     ret = GST_FLOW_NOT_LINKED;
 
+done:
   gst_buffer_unref (buf);
+  g_free (buffers_out);
   return ret;
 
 alloc_buffer_failed:
@@ -307,6 +307,7 @@ clean_buffers:
         gst_buffer_unref (buffers_out[i]);
     }
     gst_buffer_unref (buf);
+    g_free (buffers_out);
     return ret;
   }
 }
diff --git a/gst/interleave/deinterleave.h b/gst/interleave/deinterleave.h
new file mode 100644
index 00000000..ee3f8e17
--- /dev/null
+++ b/gst/interleave/deinterleave.h
@@ -0,0 +1,65 @@
+/* GStreamer
+ * Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
+ *                    2000 Wim Taymans <wtay@chello.be>
+ *                    2005 Wim Taymans <wim@fluendo.com>
+ *                    2007 Andy Wingo <wingo at pobox.com>
+ *                    2008 Sebastian Dröge <slomo@circular-chaos.org>
+ *
+ * deinterleave.c: deinterleave samples, based on interleave.c
+ *
+ * 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 __DEINTERLEAVE_H__
+#define __DEINTERLEAVE_H__
+
+G_BEGIN_DECLS
+
+#include <gst/gst.h>
+
+#define GST_TYPE_DEINTERLEAVE            (gst_deinterleave_get_type())
+#define GST_DEINTERLEAVE(obj)            (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_DEINTERLEAVE,GstDeinterleave))
+#define GST_DEINTERLEAVE_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_DEINTERLEAVE,GstDeinterleaveClass))
+#define GST_DEINTERLEAVE_GET_CLASS(obj) \
+        (G_TYPE_INSTANCE_GET_CLASS ((obj),GST_TYPE_DEINTERLEAVE,GstDeinterleaveClass))
+#define GST_IS_DEINTERLEAVE(obj)         (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_DEINTERLEAVE))
+#define GST_IS_DEINTERLEAVE_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_DEINTERLEAVE))
+
+typedef struct _GstDeinterleave GstDeinterleave;
+typedef struct _GstDeinterleaveClass GstDeinterleaveClass;
+
+struct _GstDeinterleave
+{
+  GstElement element;
+
+  /*< private > */
+  GList *srcpads;
+  GstCaps *sinkcaps;
+  gint channels;
+
+  GstPad *sink;
+};
+
+struct _GstDeinterleaveClass
+{
+  GstElementClass parent_class;
+};
+
+GType gst_deinterleave_get_type (void);
+
+G_END_DECLS
+
+#endif /* __DEINTERLEAVE_H__ */
diff --git a/gst/interleave/interleave.c b/gst/interleave/interleave.c
index bce077d7..be5b4108 100644
--- a/gst/interleave/interleave.c
+++ b/gst/interleave/interleave.c
@@ -45,45 +45,11 @@
 #endif
 
 #include <gst/gst.h>
-
-
-#define GST_TYPE_INTERLEAVE            (gst_interleave_get_type())
-#define GST_INTERLEAVE(obj)            (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_INTERLEAVE,GstInterleave))
-#define GST_INTERLEAVE_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_INTERLEAVE,GstInterleaveClass))
-#define GST_INTERLEAVE_GET_CLASS(obj) \
-        (G_TYPE_INSTANCE_GET_CLASS ((obj),GST_TYPE_INTERLEAVE,GstInterleaveClass))
-#define GST_IS_INTERLEAVE(obj)         (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_INTERLEAVE))
-#define GST_IS_INTERLEAVE_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_INTERLEAVE))
-
-
-typedef struct _GstInterleave GstInterleave;
-typedef struct _GstInterleaveClass GstInterleaveClass;
-
-
-struct _GstInterleave
-{
-  GstElement element;
-
-  GstCaps *sinkcaps;
-  guint channels;
-
-  GstPad *src;
-
-  GstActivateMode mode;
-
-  guint pending_in;
-};
-
-struct _GstInterleaveClass
-{
-  GstElementClass parent_class;
-};
-
+#include "interleave.h"
 
 GST_DEBUG_CATEGORY_STATIC (gst_interleave_debug);
 #define GST_CAT_DEFAULT gst_interleave_debug
 
-
 static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink%d",
     GST_PAD_SINK,
     GST_PAD_REQUEST,
@@ -156,20 +122,13 @@ static gboolean gst_interleave_src_setcaps (GstPad * pad, GstCaps * caps);
 static gboolean gst_interleave_sink_setcaps (GstPad * pad, GstCaps * caps);
 static GstCaps *gst_interleave_src_getcaps (GstPad * pad);
 
-
-static const GstElementDetails details =
-GST_ELEMENT_DETAILS ("Audio interleaver",
-    "Filter/Converter/Audio",
-    "Folds many mono channels into one interleaved audio stream",
-    "Andy Wingo <wingo at pobox.com>");
-
 static void
 gst_interleave_base_init (gpointer g_class)
 {
-  GST_DEBUG_CATEGORY_INIT (gst_interleave_debug, "interleave", 0,
-      "interleave element");
-
-  gst_element_class_set_details (g_class, &details);
+  gst_element_class_set_details_simple (g_class, "Audio interleaver",
+      "Filter/Converter/Audio",
+      "Folds many mono channels into one interleaved audio stream",
+      "Andy Wingo <wingo at pobox.com>");
 
   gst_element_class_add_pad_template (g_class,
       gst_static_pad_template_get (&sink_template));
@@ -184,6 +143,9 @@ gst_interleave_class_init (GstInterleaveClass * klass)
 
   gstelement_class = GST_ELEMENT_CLASS (klass);
 
+  GST_DEBUG_CATEGORY_INIT (gst_interleave_debug, "interleave", 0,
+      "interleave element");
+
   gstelement_class->request_new_pad =
       GST_DEBUG_FUNCPTR (gst_interleave_request_new_pad);
 }
diff --git a/gst/interleave/interleave.h b/gst/interleave/interleave.h
new file mode 100644
index 00000000..915871eb
--- /dev/null
+++ b/gst/interleave/interleave.h
@@ -0,0 +1,66 @@
+/* GStreamer
+ * Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
+ *                    2000 Wim Taymans <wtay@chello.be>
+ *                    2005 Wim Taymans <wim@fluendo.com>
+ *                    2007 Andy Wingo <wingo at pobox.com>
+ *
+ * interleave.c: interleave samples, based on gstsignalprocessor.c
+ *
+ * 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 __INTERLEAVE_H__
+#define __INTERLEAVE_H__
+
+#include <gst/gst.h>
+
+G_BEGIN_DECLS
+
+#define GST_TYPE_INTERLEAVE            (gst_interleave_get_type())
+#define GST_INTERLEAVE(obj)            (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_INTERLEAVE,GstInterleave))
+#define GST_INTERLEAVE_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_INTERLEAVE,GstInterleaveClass))
+#define GST_INTERLEAVE_GET_CLASS(obj) \
+        (G_TYPE_INSTANCE_GET_CLASS ((obj),GST_TYPE_INTERLEAVE,GstInterleaveClass))
+#define GST_IS_INTERLEAVE(obj)         (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_INTERLEAVE))
+#define GST_IS_INTERLEAVE_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_INTERLEAVE))
+
+typedef struct _GstInterleave GstInterleave;
+typedef struct _GstInterleaveClass GstInterleaveClass;
+
+struct _GstInterleave
+{
+  GstElement element;
+
+  /*< private >*/
+  GstCaps *sinkcaps;
+  guint channels;
+
+  GstPad *src;
+  GstActivateMode mode;
+
+  guint pending_in;
+};
+
+struct _GstInterleaveClass
+{
+  GstElementClass parent_class;
+};
+
+GType gst_interleave_get_type (void);
+
+G_END_DECLS
+
+#endif /* __INTERLEAVE_H__ */
diff --git a/gst/interleave/plugin.h b/gst/interleave/plugin.h
index bc722bdb..3e96a7e1 100644
--- a/gst/interleave/plugin.h
+++ b/gst/interleave/plugin.h
@@ -25,12 +25,7 @@
 
 
 #include <gst/gst.h>
-
-G_BEGIN_DECLS
-
-GType gst_interleave_get_type (void);
-GType gst_deinterleave_get_type (void);
-
-G_END_DECLS
+#include "interleave.h"
+#include "deinterleave.h"
 
 #endif /* __GST_PLUGIN_INTERLEAVE_H__ */
diff --git a/tests/check/elements/deinterleave.c b/tests/check/elements/deinterleave.c
new file mode 100644
index 00000000..04b6f092
--- /dev/null
+++ b/tests/check/elements/deinterleave.c
@@ -0,0 +1,358 @@
+/* GStreamer unit tests for the interleave element
+ * Copyright (C) 2008 Sebastian Dröge <slomo@circular-chaos.org>
+ *
+ * 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.
+ */
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include <gst/check/gstcheck.h>
+
+GST_START_TEST (test_create_and_unref)
+{
+  GstElement *deinterleave;
+
+  deinterleave = gst_element_factory_make ("deinterleave", NULL);
+  fail_unless (deinterleave != NULL);
+
+  gst_element_set_state (deinterleave, GST_STATE_NULL);
+  gst_object_unref (deinterleave);
+}
+
+GST_END_TEST;
+
+static GstPad *mysrcpad, **mysinkpads;
+static gint nsinkpads;
+static GstBus *bus;
+static GstElement *deinterleave;
+
+static GstStaticPadTemplate sinktemplate = GST_STATIC_PAD_TEMPLATE ("sink",
+    GST_PAD_SINK,
+    GST_PAD_ALWAYS,
+    GST_STATIC_CAPS ("audio/x-raw-float, "
+        "width = (int) 32, "
+        "channels = (int) 1, "
+        "rate = (int) {32000, 48000}, " "endianness = (int) BYTE_ORDER"));
+
+static GstStaticPadTemplate srctemplate = GST_STATIC_PAD_TEMPLATE ("src",
+    GST_PAD_SRC,
+    GST_PAD_ALWAYS,
+    GST_STATIC_CAPS ("audio/x-raw-float, "
+        "width = (int) 32, "
+        "channels = (int) 2, "
+        "rate = (int) {32000, 48000}, " "endianness = (int) BYTE_ORDER"));
+
+#define CAPS_32khz \
+         "audio/x-raw-float, " \
+        "width = (int) 32, " \
+        "channels = (int) 2, " \
+        "rate = (int) 32000, " \
+	"endianness = (int) BYTE_ORDER"
+
+#define CAPS_48khz \
+         "audio/x-raw-float, " \
+        "width = (int) 32, " \
+        "channels = (int) 2, " \
+        "rate = (int) 48000, " \
+	"endianness = (int) BYTE_ORDER"
+
+#define CAPS_48khz_3CH \
+         "audio/x-raw-float, " \
+        "width = (int) 32, " \
+        "channels = (int) 3, " \
+        "rate = (int) 48000, " \
+	"endianness = (int) BYTE_ORDER"
+
+static GstFlowReturn
+deinterleave_chain_func (GstPad * pad, GstBuffer * buffer)
+{
+  gint i;
+  gfloat *indata;
+
+  fail_unless (GST_IS_BUFFER (buffer));
+  fail_unless_equals_int (GST_BUFFER_SIZE (buffer), 48000 * sizeof (gfloat));
+  fail_unless (GST_BUFFER_DATA (buffer) != NULL);
+
+  indata = (gfloat *) GST_BUFFER_DATA (buffer);
+
+  if (strcmp (GST_PAD_NAME (pad), "sink0") == 0) {
+    for (i = 0; i < 48000; i++)
+      fail_unless_equals_float (indata[i], -1.0);
+  } else if (strcmp (GST_PAD_NAME (pad), "sink1") == 0) {
+    for (i = 0; i < 48000; i++)
+      fail_unless_equals_float (indata[i], 1.0);
+  } else {
+    g_assert_not_reached ();
+  }
+
+  gst_buffer_unref (buffer);
+
+  return GST_FLOW_OK;
+}
+
+static void
+deinterleave_pad_added (GstElement * src, GstPad * pad, gpointer data)
+{
+  gchar *name;
+  gint link = GPOINTER_TO_INT (data);
+
+  if (nsinkpads >= link)
+    return;
+
+  name = g_strdup_printf ("sink%d", nsinkpads);
+
+  mysinkpads[nsinkpads] =
+      gst_pad_new_from_static_template (&sinktemplate, name);
+  g_free (name);
+  fail_if (mysinkpads[nsinkpads] == NULL);
+
+  gst_pad_set_chain_function (mysinkpads[nsinkpads], deinterleave_chain_func);
+  fail_unless (gst_pad_link (pad, mysinkpads[nsinkpads]) == GST_PAD_LINK_OK);
+  gst_pad_set_active (mysinkpads[nsinkpads], TRUE);
+  nsinkpads++;
+}
+
+GST_START_TEST (test_2_channels)
+{
+  GstPad *sinkpad;
+  gint i;
+  GstBuffer *inbuf;
+  GstCaps *caps;
+  gfloat *indata;
+
+  mysinkpads = g_new0 (GstPad *, 2);
+  nsinkpads = 0;
+
+  deinterleave = gst_element_factory_make ("deinterleave", NULL);
+  fail_unless (deinterleave != NULL);
+
+  mysrcpad = gst_pad_new_from_static_template (&srctemplate, "src");
+  fail_unless (mysrcpad != NULL);
+
+  caps = gst_caps_from_string (CAPS_48khz);
+  fail_unless (gst_pad_set_caps (mysrcpad, caps));
+  gst_pad_use_fixed_caps (mysrcpad);
+
+  sinkpad = gst_element_get_pad (deinterleave, "sink");
+  fail_unless (sinkpad != NULL);
+  fail_unless (gst_pad_link (mysrcpad, sinkpad) == GST_PAD_LINK_OK);
+  g_object_unref (sinkpad);
+
+  g_signal_connect (deinterleave, "pad-added",
+      G_CALLBACK (deinterleave_pad_added), GINT_TO_POINTER (2));
+
+  bus = gst_bus_new ();
+  gst_element_set_bus (deinterleave, bus);
+
+  fail_unless (gst_element_set_state (deinterleave,
+          GST_STATE_PLAYING) == GST_STATE_CHANGE_SUCCESS);
+
+  inbuf = gst_buffer_new_and_alloc (2 * 48000 * sizeof (gfloat));
+  indata = (gfloat *) GST_BUFFER_DATA (inbuf);
+  for (i = 0; i < 2 * 48000; i += 2) {
+    indata[i] = -1.0;
+    indata[i + 1] = 1.0;
+  }
+  gst_buffer_set_caps (inbuf, caps);
+
+  fail_unless (gst_pad_push (mysrcpad, inbuf) == GST_FLOW_OK);
+
+  fail_unless (gst_element_set_state (deinterleave,
+          GST_STATE_NULL) == GST_STATE_CHANGE_SUCCESS);
+
+  for (i = 0; i < nsinkpads; i++)
+    g_object_unref (mysinkpads[i]);
+  g_free (mysinkpads);
+  mysinkpads = NULL;
+
+  g_object_unref (deinterleave);
+  g_object_unref (bus);
+  gst_caps_unref (caps);
+}
+
+GST_END_TEST;
+
+GST_START_TEST (test_2_channels_1_linked)
+{
+  GstPad *sinkpad;
+  gint i;
+  GstBuffer *inbuf;
+  GstCaps *caps;
+  gfloat *indata;
+
+  nsinkpads = 0;
+  mysinkpads = g_new0 (GstPad *, 2);
+
+  deinterleave = gst_element_factory_make ("deinterleave", NULL);
+  fail_unless (deinterleave != NULL);
+
+  mysrcpad = gst_pad_new_from_static_template (&srctemplate, "src");
+  fail_unless (mysrcpad != NULL);
+
+  caps = gst_caps_from_string (CAPS_48khz);
+  fail_unless (gst_pad_set_caps (mysrcpad, caps));
+  gst_pad_use_fixed_caps (mysrcpad);
+
+  sinkpad = gst_element_get_pad (deinterleave, "sink");
+  fail_unless (sinkpad != NULL);
+  fail_unless (gst_pad_link (mysrcpad, sinkpad) == GST_PAD_LINK_OK);
+  g_object_unref (sinkpad);
+
+  g_signal_connect (deinterleave, "pad-added",
+      G_CALLBACK (deinterleave_pad_added), GINT_TO_POINTER (1));
+
+  bus = gst_bus_new ();
+  gst_element_set_bus (deinterleave, bus);
+
+  fail_unless (gst_element_set_state (deinterleave,
+          GST_STATE_PLAYING) == GST_STATE_CHANGE_SUCCESS);
+
+  inbuf = gst_buffer_new_and_alloc (2 * 48000 * sizeof (gfloat));
+  indata = (gfloat *) GST_BUFFER_DATA (inbuf);
+  for (i = 0; i < 2 * 48000; i += 2) {
+    indata[i] = -1.0;
+    indata[i + 1] = 1.0;
+  }
+  gst_buffer_set_caps (inbuf, caps);
+
+  fail_unless (gst_pad_push (mysrcpad, inbuf) == GST_FLOW_OK);
+
+  fail_unless (gst_element_set_state (deinterleave,
+          GST_STATE_NULL) == GST_STATE_CHANGE_SUCCESS);
+
+  for (i = 0; i < nsinkpads; i++)
+    g_object_unref (mysinkpads[i]);
+  g_free (mysinkpads);
+  mysinkpads = NULL;
+
+  g_object_unref (deinterleave);
+  g_object_unref (bus);
+  gst_caps_unref (caps);
+}
+
+GST_END_TEST;
+
+GST_START_TEST (test_2_channels_caps_change)
+{
+  GstPad *sinkpad;
+  GstCaps *caps, *caps2;
+  gint i;
+  GstBuffer *inbuf;
+  gfloat *indata;
+
+  nsinkpads = 0;
+  mysinkpads = g_new0 (GstPad *, 2);
+
+  deinterleave = gst_element_factory_make ("deinterleave", NULL);
+  fail_unless (deinterleave != NULL);
+
+  mysrcpad = gst_pad_new_from_static_template (&srctemplate, "src");
+  fail_unless (mysrcpad != NULL);
+
+  caps = gst_caps_from_string (CAPS_48khz);
+  fail_unless (gst_pad_set_caps (mysrcpad, caps));
+  gst_pad_use_fixed_caps (mysrcpad);
+
+  sinkpad = gst_element_get_pad (deinterleave, "sink");
+  fail_unless (sinkpad != NULL);
+  fail_unless (gst_pad_link (mysrcpad, sinkpad) == GST_PAD_LINK_OK);
+  g_object_unref (sinkpad);
+
+  g_signal_connect (deinterleave, "pad-added",
+      G_CALLBACK (deinterleave_pad_added), GINT_TO_POINTER (2));
+
+  bus = gst_bus_new ();
+  gst_element_set_bus (deinterleave, bus);
+
+  fail_unless (gst_element_set_state (deinterleave,
+          GST_STATE_PLAYING) == GST_STATE_CHANGE_SUCCESS);
+
+  inbuf = gst_buffer_new_and_alloc (2 * 48000 * sizeof (gfloat));
+  indata = (gfloat *) GST_BUFFER_DATA (inbuf);
+  for (i = 0; i < 2 * 48000; i += 2) {
+    indata[i] = -1.0;
+    indata[i + 1] = 1.0;
+  }
+  gst_buffer_set_caps (inbuf, caps);
+
+  fail_unless (gst_pad_push (mysrcpad, inbuf) == GST_FLOW_OK);
+
+  caps2 = gst_caps_from_string (CAPS_32khz);
+  gst_pad_set_caps (mysrcpad, caps2);
+
+  inbuf = gst_buffer_new_and_alloc (2 * 48000 * sizeof (gfloat));
+  indata = (gfloat *) GST_BUFFER_DATA (inbuf);
+  for (i = 0; i < 2 * 48000; i += 2) {
+    indata[i] = -1.0;
+    indata[i + 1] = 1.0;
+  }
+  gst_buffer_set_caps (inbuf, caps2);
+
+  /* Should work fine because the caps changed in a compatible way */
+  fail_unless (gst_pad_push (mysrcpad, inbuf) == GST_FLOW_OK);
+
+  gst_caps_unref (caps2);
+
+  caps2 = gst_caps_from_string (CAPS_48khz_3CH);
+  gst_pad_set_caps (mysrcpad, caps2);
+
+  inbuf = gst_buffer_new_and_alloc (3 * 48000 * sizeof (gfloat));
+  indata = (gfloat *) GST_BUFFER_DATA (inbuf);
+  for (i = 0; i < 3 * 48000; i += 3) {
+    indata[i] = -1.0;
+    indata[i + 1] = 1.0;
+    indata[i + 2] = 0.0;
+  }
+  gst_buffer_set_caps (inbuf, caps2);
+
+  /* Should break because the caps changed in an incompatible way */
+  fail_if (gst_pad_push (mysrcpad, inbuf) == GST_FLOW_OK);
+
+  fail_unless (gst_element_set_state (deinterleave,
+          GST_STATE_NULL) == GST_STATE_CHANGE_SUCCESS);
+
+  for (i = 0; i < nsinkpads; i++)
+    g_object_unref (mysinkpads[i]);
+  g_free (mysinkpads);
+  mysinkpads = NULL;
+
+  g_object_unref (deinterleave);
+  g_object_unref (bus);
+  gst_caps_unref (caps);
+  gst_caps_unref (caps2);
+}
+
+GST_END_TEST;
+
+
+static Suite *
+deinterleave_suite (void)
+{
+  Suite *s = suite_create ("deinterleave");
+  TCase *tc_chain = tcase_create ("general");
+
+  suite_add_tcase (s, tc_chain);
+  tcase_add_test (tc_chain, test_create_and_unref);
+  tcase_add_test (tc_chain, test_2_channels);
+  tcase_add_test (tc_chain, test_2_channels_1_linked);
+  tcase_add_test (tc_chain, test_2_channels_caps_change);
+
+  return s;
+}
+
+GST_CHECK_MAIN (deinterleave);