gstreamer/ges/ges-custom-source-clip.c
2013-03-15 00:13:09 -03:00

267 lines
7.6 KiB
C

/* GStreamer Editing Services
* Copyright (C) 2009 Edward Hervey <edward.hervey@collabora.co.uk>
* 2009 Nokia Corporation
*
* 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.
*/
/**
* SECTION:ges-custom-source-clip
* @short_description: Convenience GESSourceClip
*
* #GESCustomSourceClip allows creating #GESSourceClip(s) without the
* need to subclass.
*
* Its usage should be limited to testing and prototyping purposes.
*
* To instanciate a asset to extract GESCustomSourceClip-s the expected
* ID is:
* 'PointerToFuncAsInt!PointerToUDataAsInt'
*
* You should use the #ges_asset_custom_source_clip_new helper to create
* a new GESAsset letting you extract GESCustomSourceClip.
*/
#include "ges-internal.h"
#include "ges-custom-source-clip.h"
#include "ges-source-clip.h"
#include "ges-source.h"
#include "ges-extractable.h"
enum
{
PROP_0,
PROP_FILL_FUNC,
PROP_USER_DATA
};
struct _GESCustomSourceClipPrivate
{
GESFillTrackElementUserFunc filltrackelementfunc;
gpointer user_data;
};
static void ges_extractable_interface_init (GESExtractableInterface * iface);
G_DEFINE_TYPE_WITH_CODE (GESCustomSourceClip, ges_custom_source_clip,
GES_TYPE_SOURCE_CLIP,
G_IMPLEMENT_INTERFACE (GES_TYPE_EXTRACTABLE,
ges_extractable_interface_init));
static GParameter *
extractable_get_parameters_from_id (const gchar * id, guint * n_params)
{
gchar **func_udata;
GParameter *params = g_new0 (GParameter, 3);
*n_params = 3;
/* We already know that we have a valid ID here */
func_udata = g_strsplit (id, "!", -1);
params[0].name = "fill-func";
g_value_init (&params[0].value, G_TYPE_POINTER);
g_value_set_pointer (&params[0].value,
GUINT_TO_POINTER (g_ascii_strtoll (func_udata[0], NULL, 10)));
params[1].name = "user-data";
g_value_init (&params[1].value, G_TYPE_POINTER);
g_value_set_pointer (&params[1].value,
GUINT_TO_POINTER (g_ascii_strtoll (func_udata[1], NULL, 10)));
params[2].name = "supported-formats";
g_value_init (&params[2].value, GES_TYPE_TRACK_TYPE);
g_value_set_flags (&params[2].value, GES_TRACK_TYPE_CUSTOM);
g_strfreev (func_udata);
return params;
}
static gchar *
extractable_check_id (GType type, const gchar * id)
{
gchar *ret, **strv = g_strsplit (id, "!", -1);
if (g_strv_length (strv) != 2) {
g_strfreev (strv);
return NULL;
}
/* Remove any whitespace */
strv[0] = g_strstrip (strv[0]);
strv[1] = g_strstrip (strv[1]);
ret = g_strjoinv ("!", strv);
g_strfreev (strv);
return ret;
}
static gchar *
extractable_get_id (GESExtractable * self)
{
GESCustomSourceClipPrivate *priv = GES_CUSTOM_SOURCE_CLIP (self)->priv;
return g_strdup_printf ("%i!%i", GPOINTER_TO_INT (priv->filltrackelementfunc),
GPOINTER_TO_INT (priv->user_data));
}
static void
ges_extractable_interface_init (GESExtractableInterface * iface)
{
iface->check_id = (GESExtractableCheckId) extractable_check_id;
iface->get_id = extractable_get_id;
iface->get_parameters_from_id = extractable_get_parameters_from_id;
}
static gboolean
ges_custom_source_clip_fill_track_element (GESClip * clip,
GESTrackElement * track_element, GstElement * gnlobj);
static GESTrackElement *
ges_custom_source_clip_create_track_element (GESClip * clip, GESTrackType type)
{
return g_object_new (GES_TYPE_SOURCE, "track-type", type, NULL);
}
static void
_set_property (GObject * object, guint property_id,
const GValue * value, GParamSpec * pspec)
{
GESCustomSourceClipPrivate *priv = GES_CUSTOM_SOURCE_CLIP (object)->priv;
switch (property_id) {
case PROP_FILL_FUNC:
priv->filltrackelementfunc = g_value_get_pointer (value);
break;
case PROP_USER_DATA:
priv->user_data = g_value_get_pointer (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}
}
static void
ges_custom_source_clip_class_init (GESCustomSourceClipClass * klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GESClipClass *clip_class = GES_CLIP_CLASS (klass);
g_type_class_add_private (klass, sizeof (GESCustomSourceClipPrivate));
clip_class->fill_track_element = ges_custom_source_clip_fill_track_element;
clip_class->create_track_element =
ges_custom_source_clip_create_track_element;
object_class->set_property = _set_property;
/**
* GESCustomSourceClip:fill-func:
*
* The function pointer to create the TrackElement content
*/
g_object_class_install_property (object_class, PROP_FILL_FUNC,
g_param_spec_pointer ("fill-func", "Fill func",
"A pointer to a GESFillTrackElementUserFunc",
G_PARAM_WRITABLE | G_PARAM_CONSTRUCT_ONLY));
/**
* GESCustomSourceClip:user-data:
*
* The user data that will be passed
*/
g_object_class_install_property (object_class, PROP_USER_DATA,
g_param_spec_pointer ("user-data", "User data",
"The user data pointer that will be passed when creating TrackElements",
G_PARAM_WRITABLE | G_PARAM_CONSTRUCT_ONLY));
}
static void
ges_custom_source_clip_init (GESCustomSourceClip * self)
{
self->priv = G_TYPE_INSTANCE_GET_PRIVATE (self,
GES_TYPE_CUSTOM_SOURCE_CLIP, GESCustomSourceClipPrivate);
}
static gboolean
ges_custom_source_clip_fill_track_element (GESClip * clip,
GESTrackElement * track_element, GstElement * gnlobj)
{
gboolean res;
GESCustomSourceClipPrivate *priv;
GST_DEBUG ("Calling callback (timelineobj:%p, trackelement:%p, gnlobj:%p)",
clip, track_element, gnlobj);
priv = GES_CUSTOM_SOURCE_CLIP (clip)->priv;
res = priv->filltrackelementfunc (clip, track_element, gnlobj,
priv->user_data);
GST_DEBUG ("Returning res:%d", res);
return res;
}
/**
* ges_custom_source_clip_new:
* @func: (scope notified): The #GESFillTrackElementUserFunc that will be used to fill the track
* objects.
* @user_data: (closure): a gpointer that will be used when @func is called.
*
* Creates a new #GESCustomSourceClip.
*
* Returns: The new #GESCustomSourceClip.
*/
GESCustomSourceClip *
ges_custom_source_clip_new (GESFillTrackElementUserFunc func,
gpointer user_data)
{
GESCustomSourceClip *src;
GESAsset *asset = ges_asset_custom_source_clip_new (func, user_data);
src = GES_CUSTOM_SOURCE_CLIP (ges_asset_extract (asset, NULL));
gst_object_unref (asset);
return src;
}
/**
* ges_asset_custom_source_clip_new:
* @func: (scope notified): The #GESFillTrackElementUserFunc that will be used to fill the track
* objects.
* @user_data: (closure): a gpointer that will be used when @func is called.
*
* Helper constructor to instanciate a new #GESAsset from which you can
* extract #GESCustomSourceClip-s
*
* Returns: The new #GESAsset.
*/
GESAsset *
ges_asset_custom_source_clip_new (GESFillTrackElementUserFunc func,
gpointer user_data)
{
GESAsset *asset;
gchar *id = g_strdup_printf ("%i!%i", GPOINTER_TO_INT (func),
GPOINTER_TO_INT (user_data));
asset = ges_asset_request (GES_TYPE_CUSTOM_SOURCE_CLIP, id, NULL);
g_free (id);
return asset;
}