Commit 82178951 authored by Mark Nauwelaerts's avatar Mark Nauwelaerts Committed by Tim-Philipp Müller
Browse files

capssetter: import element into -bad

parent 5ae7119d
/* GStreamer Element
* Copyright (C) 2006-2009 Mark Nauwelaerts <mnauw@users.sourceforge.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., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1307, USA.
*/
/**
* SECTION:element-capssetter
*
* <refsect2>
* <para>
* Sets or merges caps on a stream's buffers.
* That is, a buffer's caps are updated using (fields of)
* <link linkend="GstCapsSetter--caps">caps</link>. Note that this may
* contain multiple structures (though not likely recommended), but each
* of these must be fixed (or will otherwise be rejected).
* </para>
* <para>
* If <link linkend="GstCapsSetter--join">join</link>
* is TRUE, then the incoming caps' mime-type is compared to the mime-type(s)
* of provided caps and only matching structure(s) are considered for updating.
* </para>
* <para>
* If <link linkend="GstCapsSetter--replace">replace</link>
* is TRUE, then any caps update is preceded by clearing existing fields,
* making provided fields (as a whole) replace incoming ones.
* Otherwise, no clearing is performed, in which case provided fields are
* added/merged onto incoming caps
* </para>
* <para>
* Although this element might mainly serve as debug helper,
* it can also practically be used to correct a faulty pixel-aspect-ratio,
* or to modify a yuv fourcc value to effectively swap chroma components or such
* alike.
* </para>
* </refsect2>
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gstcapssetter.h"
#include <string.h>
GST_DEBUG_CATEGORY_STATIC (caps_setter_debug);
#define GST_CAT_DEFAULT caps_setter_debug
/* signals and args */
enum
{
/* FILL ME */
LAST_SIGNAL
};
enum
{
PROP_0,
PROP_CAPS,
PROP_JOIN,
PROP_REPLACE
/* FILL ME */
};
#define DEFAULT_JOIN TRUE
#define DEFAULT_REPLACE FALSE
static GstElementDetails caps_setter_details =
GST_ELEMENT_DETAILS ("CapsSetter",
"Generic",
"Set/merge caps on stream",
"Mark Nauwelaerts <mnauw@users.sourceforge.net>");
static GstStaticPadTemplate gst_caps_setter_src_template =
GST_STATIC_PAD_TEMPLATE (GST_BASE_TRANSFORM_SRC_NAME,
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS_ANY);
static GstStaticPadTemplate gst_caps_setter_sink_template =
GST_STATIC_PAD_TEMPLATE (GST_BASE_TRANSFORM_SINK_NAME,
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS_ANY);
static gboolean gst_caps_setter_transform_size (GstBaseTransform * trans,
GstPadDirection direction, GstCaps * caps, guint size,
GstCaps * othercaps, guint * othersize);
static GstCaps *gst_caps_setter_transform_caps (GstBaseTransform * trans,
GstPadDirection direction, GstCaps * caps);
static GstFlowReturn gst_caps_setter_transform_ip (GstBaseTransform * btrans,
GstBuffer * in);
static void gst_caps_setter_finalize (GObject * object);
static void gst_caps_setter_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_caps_setter_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
GST_BOILERPLATE (GstCapsSetter, gst_caps_setter, GstBaseTransform,
GST_TYPE_BASE_TRANSFORM);
static void
gst_caps_setter_base_init (gpointer g_class)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
gst_element_class_set_details (element_class, &caps_setter_details);
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_caps_setter_sink_template));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_caps_setter_src_template));
}
static void
gst_caps_setter_class_init (GstCapsSetterClass * g_class)
{
GObjectClass *gobject_class;
GstBaseTransformClass *trans_class;
gobject_class = G_OBJECT_CLASS (g_class);
trans_class = GST_BASE_TRANSFORM_CLASS (g_class);
GST_DEBUG_CATEGORY_INIT (caps_setter_debug, "capssetter", 0, "capssetter");
gobject_class->set_property = gst_caps_setter_set_property;
gobject_class->get_property = gst_caps_setter_get_property;
gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_caps_setter_finalize);
g_object_class_install_property (gobject_class, PROP_CAPS,
g_param_spec_boxed ("caps", "Merge caps",
"Merge these caps (thereby overwriting) in the stream",
GST_TYPE_CAPS, G_PARAM_READWRITE));
g_object_class_install_property (gobject_class, PROP_JOIN,
g_param_spec_boolean ("join", "Join",
"Match incoming caps' mime-type to mime-type of provided caps",
DEFAULT_JOIN, G_PARAM_READWRITE));
g_object_class_install_property (gobject_class, PROP_REPLACE,
g_param_spec_boolean ("replace", "Replace",
"Drop fields of incoming caps", DEFAULT_REPLACE, G_PARAM_READWRITE));
trans_class->transform_size =
GST_DEBUG_FUNCPTR (gst_caps_setter_transform_size);
trans_class->transform_caps =
GST_DEBUG_FUNCPTR (gst_caps_setter_transform_caps);
/* dummy seems needed */
trans_class->transform_ip = GST_DEBUG_FUNCPTR (gst_caps_setter_transform_ip);
}
static void
gst_caps_setter_init (GstCapsSetter * filter, GstCapsSetterClass * g_class)
{
filter->caps = gst_caps_new_any ();
filter->join = DEFAULT_JOIN;
filter->replace = DEFAULT_REPLACE;
}
static void
gst_caps_setter_finalize (GObject * object)
{
GstCapsSetter *filter = GST_CAPS_SETTER (object);
gst_caps_replace (&filter->caps, NULL);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static gboolean
gst_caps_setter_transform_size (GstBaseTransform * trans,
GstPadDirection direction, GstCaps * caps, guint size,
GstCaps * othercaps, guint * othersize)
{
*othersize = size;
return TRUE;
}
static GstCaps *
gst_caps_setter_transform_caps (GstBaseTransform * trans,
GstPadDirection direction, GstCaps * caps)
{
GstCapsSetter *filter;
GstCaps *ret, *filter_caps;
GstStructure *structure, *merge;
const gchar *name;
gint i, j;
filter = GST_CAPS_SETTER (trans);
GST_DEBUG_OBJECT (trans, "receiving caps: %" GST_PTR_FORMAT, caps);
ret = gst_caps_copy (caps);
/* this function is always called with a simple caps */
if (!GST_CAPS_IS_SIMPLE (ret) || direction != GST_PAD_SINK)
return ret;
structure = gst_caps_get_structure (ret, 0);
name = gst_structure_get_name (structure);
GST_OBJECT_LOCK (filter);
filter_caps = gst_caps_ref (filter->caps);
GST_OBJECT_UNLOCK (filter);
for (i = 0; i < gst_caps_get_size (filter_caps); ++i) {
merge = gst_caps_get_structure (filter_caps, i);
if (gst_structure_has_name (merge, name) || !filter->join) {
if (!filter->join)
gst_structure_set_name (structure, gst_structure_get_name (merge));
if (filter->replace)
gst_structure_remove_all_fields (structure);
for (j = 0; j < gst_structure_n_fields (merge); ++j) {
const gchar *fname;
fname = gst_structure_nth_field_name (merge, j);
gst_structure_set_value (structure, fname,
gst_structure_get_value (merge, fname));
}
}
}
GST_DEBUG_OBJECT (trans, "returning caps: %" GST_PTR_FORMAT, ret);
gst_caps_unref (filter_caps);
return ret;
}
static GstFlowReturn
gst_caps_setter_transform_ip (GstBaseTransform * btrans, GstBuffer * in)
{
return GST_FLOW_OK;
}
static gboolean
gst_caps_is_fixed_foreach (GQuark field_id, const GValue * value,
gpointer unused)
{
return gst_value_is_fixed (value);
}
static void
gst_caps_setter_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstCapsSetter *filter;
g_return_if_fail (GST_IS_CAPS_SETTER (object));
filter = GST_CAPS_SETTER (object);
switch (prop_id) {
case PROP_CAPS:{
GstCaps *new_caps;
const GstCaps *new_caps_val = gst_value_get_caps (value);
gint i;
if (new_caps_val == NULL) {
new_caps = gst_caps_new_any ();
} else {
new_caps = gst_caps_copy (new_caps_val);
}
for (i = 0; new_caps && (i < gst_caps_get_size (new_caps)); ++i) {
GstStructure *s;
s = gst_caps_get_structure (new_caps, i);
if (!gst_structure_foreach (s, gst_caps_is_fixed_foreach, NULL)) {
GST_ERROR_OBJECT (filter, "rejected unfixed caps: %" GST_PTR_FORMAT,
new_caps);
gst_caps_unref (new_caps);
new_caps = NULL;
break;
}
}
if (new_caps) {
GST_OBJECT_LOCK (filter);
gst_caps_replace (&filter->caps, new_caps);
/* drop extra ref */
gst_caps_unref (new_caps);
GST_OBJECT_UNLOCK (filter);
GST_DEBUG_OBJECT (filter, "set new caps %" GST_PTR_FORMAT, new_caps);
}
/* try to activate these new caps next time around */
gst_base_transform_reconfigure (GST_BASE_TRANSFORM (filter));
break;
}
case PROP_JOIN:
filter->join = g_value_get_boolean (value);
break;
case PROP_REPLACE:
filter->replace = g_value_get_boolean (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_caps_setter_get_property (GObject * object, guint prop_id, GValue * value,
GParamSpec * pspec)
{
GstCapsSetter *filter;
g_return_if_fail (GST_IS_CAPS_SETTER (object));
filter = GST_CAPS_SETTER (object);
switch (prop_id) {
case PROP_CAPS:
gst_value_set_caps (value, filter->caps);
break;
case PROP_JOIN:
g_value_set_boolean (value, filter->join);
break;
case PROP_REPLACE:
g_value_set_boolean (value, filter->replace);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
/* GStreamer Element
* Copyright (C) 2006-2009 Mark Nauwelaerts <mnauw@users.sourceforge.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., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1307, USA.
*/
#ifndef __GST_CAPS_SETTER_H__
#define __GST_CAPS_SETTER_H__
#include <gst/base/gstbasetransform.h>
G_BEGIN_DECLS
#define GST_TYPE_CAPS_SETTER \
(gst_caps_setter_get_type())
#define GST_CAPS_SETTER(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_CAPS_SETTER,GstCapsSetter))
#define GST_CAPS_SETTER_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_CAPS_SETTER,GstCapsSetterClass))
#define GST_IS_CAPS_SETTER(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_CAPS_SETTER))
#define GST_IS_CAPS_SETTER_CLASS(klass) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_CAPS_SETTER))
GType gst_caps_setter_get_type (void);
typedef struct _GstCapsSetter GstCapsSetter;
typedef struct _GstCapsSetterClass GstCapsSetterClass;
struct _GstCapsSetter
{
GstBaseTransform parent;
/* properties */
GstCaps *caps;
gboolean join;
gboolean replace;
};
struct _GstCapsSetterClass
{
GstBaseTransformClass parent_class;
};
G_END_DECLS
#endif /* __GST_CAPS_SETTER_H__ */
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