gstreamer/gst/debugutils/gstcapsdebug.c

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/* 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., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
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*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <gst/gst.h>
#include <gst/gst.h>
#include "gstcapsdebug.h"
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GST_DEBUG_CATEGORY_STATIC (gst_caps_debug_debug);
#define GST_CAT_DEFAULT gst_caps_debug_debug
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/* prototypes */
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);
/* 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 */
#define gst_caps_debug_parent_class parent_class
G_DEFINE_TYPE (GstCapsDebug, gst_caps_debug, GST_TYPE_ELEMENT);
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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->dispose = gst_caps_debug_dispose;
gobject_class->finalize = gst_caps_debug_finalize;
element_class->change_state = GST_DEBUG_FUNCPTR (gst_caps_debug_change_state);
GST_DEBUG_CATEGORY_INIT (gst_caps_debug_debug, "capsdebug", 0,
"debug category for capsdebug element");
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_static_metadata (element_class, "Caps debug",
"Generic", "Debug caps negotiation", "David Schleef <ds@schleef.org>");
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}
static void
gst_caps_debug_init (GstCapsDebug * capsdebug)
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{
capsdebug->srcpad =
gst_pad_new_from_static_template (&gst_caps_debug_src_template, "src");
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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_static_template (&gst_caps_debug_sink_template, "sink");
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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_dispose (GObject * object)
{
/* clean up as possible. may be called multiple times */
G_OBJECT_CLASS (parent_class)->dispose (object);
}
void
gst_caps_debug_finalize (GObject * 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 ret;
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}
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;
}