capsdebug: Add new element

gst/debugutils/Makefile.am

@@ -8,6 +8,7 @@ plugin_LTLIBRARIES = $(EFENCE_PLUGIN) libgstdebug.la libgstnavigationtest.la
 
 noinst_HEADERS = \
 	efence.h \
+	gstcapsdebug.h \
 	gstcapssetter.h \
 	gstnavigationtest.h \
 	gstnavseek.h \
@@ -33,6 +34,7 @@ libgstnavigationtest_la_LIBTOOLFLAGS = --tag=disable-static
 libgstdebug_la_SOURCES = \
 	gstdebug.c \
 	breakmydata.c \
+	gstcapsdebug.c \
 	gstcapssetter.c \
 	gstnavseek.c \
 	gstpushfilesrc.c \

gst/debugutils/gstcapsdebug.c

@@ -0,0 +1,314 @@
+/* GStreamer
+ * Copyright (C) 2010 David Schleef <ds@schleef.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/gst.h>
+#include <gst/gst.h>
+#include "gstcapsdebug.h"
+
+/* prototypes */
+
+
+static void gst_caps_debug_set_property (GObject * object,
+    guint property_id, const GValue * value, GParamSpec * pspec);
+static void gst_caps_debug_get_property (GObject * object,
+    guint property_id, GValue * value, GParamSpec * pspec);
+static void gst_caps_debug_dispose (GObject * object);
+static void gst_caps_debug_finalize (GObject * object);
+
+static GstFlowReturn gst_caps_debug_sink_chain (GstPad * pad,
+    GstBuffer * buffer);
+static GstCaps *gst_caps_debug_getcaps (GstPad * pad);
+static gboolean gst_caps_debug_acceptcaps (GstPad * pad, GstCaps * caps);
+static GstFlowReturn gst_caps_debug_bufferalloc (GstPad * pad,
+    guint64 offset, guint size, GstCaps * caps, GstBuffer ** buf);
+
+static GstStateChangeReturn
+gst_caps_debug_change_state (GstElement * element, GstStateChange transition);
+
+enum
+{
+  PROP_0
+};
+
+/* pad templates */
+
+static GstStaticPadTemplate gst_caps_debug_sink_template =
+GST_STATIC_PAD_TEMPLATE ("sink",
+    GST_PAD_SINK,
+    GST_PAD_ALWAYS,
+    GST_STATIC_CAPS_ANY);
+
+static GstStaticPadTemplate gst_caps_debug_src_template =
+GST_STATIC_PAD_TEMPLATE ("src",
+    GST_PAD_SRC,
+    GST_PAD_ALWAYS,
+    GST_STATIC_CAPS_ANY);
+
+/* class initialization */
+
+GST_BOILERPLATE (GstCapsDebug, gst_caps_debug, GstElement, GST_TYPE_ELEMENT);
+
+static void
+gst_caps_debug_base_init (gpointer g_class)
+{
+  GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
+
+  gst_element_class_add_pad_template (element_class,
+      gst_static_pad_template_get (&gst_caps_debug_src_template));
+  gst_element_class_add_pad_template (element_class,
+      gst_static_pad_template_get (&gst_caps_debug_sink_template));
+
+  gst_element_class_set_details_simple (element_class, "Caps debug",
+      "Generic", "Debug caps negotiation", "David Schleef <ds@schleef.org>");
+}
+
+static void
+gst_caps_debug_class_init (GstCapsDebugClass * klass)
+{
+  GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
+  GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
+
+  gobject_class->set_property = gst_caps_debug_set_property;
+  gobject_class->get_property = gst_caps_debug_get_property;
+  gobject_class->dispose = gst_caps_debug_dispose;
+  gobject_class->finalize = gst_caps_debug_finalize;
+  element_class->change_state = GST_DEBUG_FUNCPTR (gst_caps_debug_change_state);
+
+}
+
+static void
+gst_caps_debug_init (GstCapsDebug * capsdebug,
+    GstCapsDebugClass * capsdebug_class)
+{
+
+  capsdebug->srcpad =
+      gst_pad_new_from_template (gst_static_pad_template_get
+      (&gst_caps_debug_src_template), "src");
+  gst_pad_set_getcaps_function (capsdebug->srcpad,
+      GST_DEBUG_FUNCPTR (gst_caps_debug_getcaps));
+  gst_pad_set_acceptcaps_function (capsdebug->srcpad,
+      GST_DEBUG_FUNCPTR (gst_caps_debug_acceptcaps));
+  gst_element_add_pad (GST_ELEMENT (capsdebug), capsdebug->srcpad);
+
+  capsdebug->sinkpad =
+      gst_pad_new_from_template (gst_static_pad_template_get
+      (&gst_caps_debug_sink_template), "sink");
+  gst_pad_set_chain_function (capsdebug->sinkpad,
+      GST_DEBUG_FUNCPTR (gst_caps_debug_sink_chain));
+  gst_pad_set_bufferalloc_function (capsdebug->sinkpad,
+      GST_DEBUG_FUNCPTR (gst_caps_debug_bufferalloc));
+  gst_pad_set_getcaps_function (capsdebug->sinkpad,
+      GST_DEBUG_FUNCPTR (gst_caps_debug_getcaps));
+  gst_pad_set_acceptcaps_function (capsdebug->sinkpad,
+      GST_DEBUG_FUNCPTR (gst_caps_debug_acceptcaps));
+  gst_element_add_pad (GST_ELEMENT (capsdebug), capsdebug->sinkpad);
+
+}
+
+void
+gst_caps_debug_set_property (GObject * object, guint property_id,
+    const GValue * value, GParamSpec * pspec)
+{
+  GstCapsDebug *capsdebug;
+
+  g_return_if_fail (GST_IS_CAPS_DEBUG (object));
+  capsdebug = GST_CAPS_DEBUG (object);
+
+  switch (property_id) {
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+      break;
+  }
+}
+
+void
+gst_caps_debug_get_property (GObject * object, guint property_id,
+    GValue * value, GParamSpec * pspec)
+{
+  GstCapsDebug *capsdebug;
+
+  g_return_if_fail (GST_IS_CAPS_DEBUG (object));
+  capsdebug = GST_CAPS_DEBUG (object);
+
+  switch (property_id) {
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+      break;
+  }
+}
+
+void
+gst_caps_debug_dispose (GObject * object)
+{
+  GstCapsDebug *capsdebug;
+
+  g_return_if_fail (GST_IS_CAPS_DEBUG (object));
+  capsdebug = GST_CAPS_DEBUG (object);
+
+  /* clean up as possible.  may be called multiple times */
+
+  G_OBJECT_CLASS (parent_class)->dispose (object);
+}
+
+void
+gst_caps_debug_finalize (GObject * object)
+{
+  GstCapsDebug *capsdebug;
+
+  g_return_if_fail (GST_IS_CAPS_DEBUG (object));
+  capsdebug = GST_CAPS_DEBUG (object);
+
+  /* clean up object here */
+
+  G_OBJECT_CLASS (parent_class)->finalize (object);
+}
+
+
+
+static GstStateChangeReturn
+gst_caps_debug_change_state (GstElement * element, GstStateChange transition)
+{
+  GstStateChangeReturn ret;
+
+  ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
+
+  return GST_STATE_CHANGE_SUCCESS;
+}
+
+
+static GstFlowReturn
+gst_caps_debug_sink_chain (GstPad * pad, GstBuffer * buffer)
+{
+  GstFlowReturn ret;
+  GstCapsDebug *capsdebug;
+
+  capsdebug = GST_CAPS_DEBUG (gst_pad_get_parent (pad));
+
+  ret = gst_pad_push (capsdebug->srcpad, buffer);
+
+  gst_object_unref (capsdebug);
+
+  return ret;
+}
+
+#define THISPAD ((pad == capsdebug->srcpad) ? "downstream" : "upstream")
+#define OTHERPAD ((pad == capsdebug->srcpad) ? "upstream" : "downstream")
+
+static GstCaps *
+gst_caps_debug_getcaps (GstPad * pad)
+{
+  GstCaps *caps;
+  GstCapsDebug *capsdebug;
+  gchar *s;
+  GstPad *otherpad;
+
+  capsdebug = GST_CAPS_DEBUG (gst_pad_get_parent (pad));
+  otherpad =
+      (pad == capsdebug->srcpad) ? capsdebug->sinkpad : capsdebug->srcpad;
+
+  GST_INFO ("%s called getcaps", THISPAD);
+
+  caps = gst_pad_peer_get_caps (otherpad);
+
+  s = gst_caps_to_string (caps);
+  GST_INFO ("%s returned %s", OTHERPAD, s);
+  g_free (s);
+
+  if (caps == NULL)
+    caps = gst_caps_new_any ();
+
+  gst_object_unref (capsdebug);
+
+  return caps;
+}
+
+
+static gboolean
+gst_caps_debug_acceptcaps (GstPad * pad, GstCaps * caps)
+{
+  GstCapsDebug *capsdebug;
+  gchar *s;
+  gboolean ret;
+  GstPad *otherpad;
+
+  capsdebug = GST_CAPS_DEBUG (gst_pad_get_parent (pad));
+  otherpad =
+      (pad == capsdebug->srcpad) ? capsdebug->sinkpad : capsdebug->srcpad;
+
+  s = gst_caps_to_string (caps);
+  GST_INFO ("%s called acceptcaps with %s", THISPAD, s);
+  g_free (s);
+
+  ret = gst_pad_peer_accept_caps (otherpad, caps);
+
+  GST_INFO ("%s returned %s", OTHERPAD, ret ? "TRUE" : "FALSE");
+
+  gst_object_unref (capsdebug);
+
+  return ret;
+}
+
+static GstFlowReturn
+gst_caps_debug_bufferalloc (GstPad * pad, guint64 offset, guint size,
+    GstCaps * caps, GstBuffer ** buf)
+{
+  GstCapsDebug *capsdebug;
+  gchar *s;
+  gchar *t;
+  GstFlowReturn ret;
+  GstPad *otherpad;
+  gboolean newcaps;
+
+  capsdebug = GST_CAPS_DEBUG (gst_pad_get_parent (pad));
+  otherpad =
+      (pad == capsdebug->srcpad) ? capsdebug->sinkpad : capsdebug->srcpad;
+
+  newcaps = (caps != GST_PAD_CAPS (pad));
+
+  if (newcaps) {
+    s = gst_caps_to_string (caps);
+    GST_INFO ("%s called bufferalloc with new caps, offset=%" G_GUINT64_FORMAT
+        " size=%d caps=%s", THISPAD, offset, size, s);
+    g_free (s);
+  }
+
+  ret = gst_pad_alloc_buffer_and_set_caps (otherpad, offset, size, caps, buf);
+
+  if (newcaps) {
+    GST_INFO ("%s returned %s", OTHERPAD, gst_flow_get_name (ret));
+  }
+  if (caps != GST_BUFFER_CAPS (*buf)) {
+    s = gst_caps_to_string (caps);
+    t = gst_caps_to_string (GST_BUFFER_CAPS (*buf));
+    GST_INFO
+        ("%s returned from bufferalloc with different caps, requested=%s returned=%s",
+        OTHERPAD, s, t);
+    g_free (s);
+    g_free (t);
+  }
+
+  gst_object_unref (capsdebug);
+
+  return ret;
+}

gst/debugutils/gstcapsdebug.h

@@ -0,0 +1,55 @@
+/* GStreamer
+ * Copyright (C) 2010 FIXME <fixme@example.com>
+ *
+ * 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_CAPS_DEBUG_H_
+#define _GST_CAPS_DEBUG_H_
+
+#include <gst/gst.h>
+#include <gst/gst.h>
+
+G_BEGIN_DECLS
+
+#define GST_TYPE_CAPS_DEBUG   (gst_caps_debug_get_type())
+#define GST_CAPS_DEBUG(obj)   (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_CAPS_DEBUG,GstCapsDebug))
+#define GST_CAPS_DEBUG_CLASS(klass)   (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_CAPS_DEBUG,GstCapsDebugClass))
+#define GST_IS_CAPS_DEBUG(obj)   (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_CAPS_DEBUG))
+#define GST_IS_CAPS_DEBUG_CLASS(obj)   (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_CAPS_DEBUG))
+
+typedef struct _GstCapsDebug GstCapsDebug;
+typedef struct _GstCapsDebugClass GstCapsDebugClass;
+
+struct _GstCapsDebug
+{
+  GstElement base_capsdebug;
+
+  GstPad *srcpad;
+  GstPad *sinkpad;
+
+};
+
+struct _GstCapsDebugClass
+{
+  GstElementClass base_capsdebug_class;
+};
+
+GType gst_caps_debug_get_type (void);
+
+G_END_DECLS
+
+#endif

gst/debugutils/gstdebug.c

@@ -24,6 +24,7 @@
 #include <gst/gst.h>
 
 GType gst_break_my_data_get_type (void);
+GType gst_caps_debug_get_type (void);
 GType gst_caps_setter_get_type (void);
 GType gst_rnd_buffer_size_get_type (void);
 GType gst_navseek_get_type (void);
@@ -54,7 +55,9 @@ plugin_init (GstPlugin * plugin)
       || !gst_element_register (plugin, "taginject", GST_RANK_NONE,
           gst_tag_inject_get_type ())
       || !gst_element_register (plugin, "testsink", GST_RANK_NONE,
-          gst_test_get_type ()))
+          gst_test_get_type ())
+      || !gst_element_register (plugin, "capsdebug", GST_RANK_NONE,
+          gst_caps_debug_get_type ()))
     return FALSE;
 
   return TRUE;