gstreamer/plugins/ges/gessrc.c
Thibault Saunier cf43d9b6d4 plugin: Make use of G_DECLARE
And remove useless .h files
2019-07-05 17:48:23 -04:00

264 lines
7 KiB
C

/* GStreamer Editing Services GStreamer plugin
* Copyright (C) 2019 Thibault Saunier <tsaunier@igalia.com>
*
* gessrc.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., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
**
* SECTION:gessrc
* @short_description: A GstBin subclasses use to use GESTimeline
* as sources inside any GstPipeline.
* @see_also: #GESTimeline
*
* The gessrc is a bin that will simply expose the track src pads
* and implements the GstUriHandler interface using a custom `ges://`
* uri scheme.
*
* NOTE: That to use it inside playbin and friends you **need** to
* set gessrc::timeline property yourself.
*
* Example with #playbin:
*
* {{../../examples/c/gessrc.c}}
*
* Example with #GstPlayer:
*
* {{../../examples/python/gst-player.py}}
**/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <gst/gst.h>
#include <ges/ges.h>
GST_DEBUG_CATEGORY_STATIC (gessrc);
#define GST_CAT_DEFAULT gessrc
static GstStaticPadTemplate video_src_template =
GST_STATIC_PAD_TEMPLATE ("video_src",
GST_PAD_SRC,
GST_PAD_SOMETIMES,
GST_STATIC_CAPS ("video/x-raw(ANY)"));
static GstStaticPadTemplate audio_src_template =
GST_STATIC_PAD_TEMPLATE ("audio_src",
GST_PAD_SRC,
GST_PAD_SOMETIMES,
GST_STATIC_CAPS ("audio/x-raw(ANY);"));
G_DECLARE_FINAL_TYPE (GESSrc, ges_src, GES, SRC, GstBin);
struct _GESSrc
{
GstBin parent;
GESTimeline *timeline;
};
#define GES_SRC(obj) ((GESSrc*) obj)
enum
{
PROP_0,
PROP_TIMELINE,
PROP_LAST
};
static GParamSpec *properties[PROP_LAST];
static gboolean
ges_src_set_timeline (GESSrc * self, GESTimeline * timeline)
{
GList *tmp;
guint naudiopad = 0, nvideopad = 0;
GstBin *sbin = GST_BIN (self);
g_return_val_if_fail (GES_IS_TIMELINE (timeline), FALSE);
if (self->timeline) {
GST_FIXME_OBJECT (self, "Implement changing timeline support");
return FALSE;
}
self->timeline = timeline;
gst_bin_add (sbin, GST_ELEMENT (self->timeline));
for (tmp = self->timeline->tracks; tmp; tmp = tmp->next) {
GstPad *gpad;
gchar *name = NULL;
GstElement *queue;
GESTrack *track = GES_TRACK (tmp->data);
GstPad *tmppad, *pad =
ges_timeline_get_pad_for_track (self->timeline, track);
GstStaticPadTemplate *template;
if (!pad) {
GST_INFO_OBJECT (self, "No pad for track: %" GST_PTR_FORMAT, track);
continue;
}
if (track->type == GES_TRACK_TYPE_AUDIO) {
name = g_strdup_printf ("audio_%u", naudiopad++);
template = &audio_src_template;
} else if (track->type == GES_TRACK_TYPE_VIDEO) {
name = g_strdup_printf ("video_%u", nvideopad++);
template = &video_src_template;
} else {
GST_INFO_OBJECT (self, "Track type not handled: %" GST_PTR_FORMAT, track);
continue;
}
queue = gst_element_factory_make ("queue", NULL);
/* Add queues the same way as in GESPipeline */
g_object_set (G_OBJECT (queue), "max-size-buffers", 0,
"max-size-bytes", 0, "max-size-time", (gint64) 2 * GST_SECOND, NULL);
gst_bin_add (GST_BIN (self), queue);
tmppad = gst_element_get_static_pad (queue, "sink");
if (gst_pad_link (pad, tmppad) != GST_PAD_LINK_OK) {
GST_ERROR ("Could not link %s:%s and %s:%s",
GST_DEBUG_PAD_NAME (pad), GST_DEBUG_PAD_NAME (tmppad));
gst_object_unref (tmppad);
gst_object_unref (queue);
continue;
}
tmppad = gst_element_get_static_pad (queue, "src");
gpad = gst_ghost_pad_new_from_template (name, tmppad,
gst_static_pad_template_get (template));
gst_pad_set_active (gpad, TRUE);
gst_element_add_pad (GST_ELEMENT (self), gpad);
}
gst_element_sync_state_with_parent (GST_ELEMENT (self->timeline));
return TRUE;
}
/*** GSTURIHANDLER INTERFACE *************************************************/
static GstURIType
ges_src_uri_get_type (GType type)
{
return GST_URI_SRC;
}
static const gchar *const *
ges_src_uri_get_protocols (GType type)
{
static const gchar *protocols[] = { "ges", NULL };
return protocols;
}
static gchar *
ges_src_uri_get_uri (GstURIHandler * handler)
{
GESSrc *self = GES_SRC (handler);
return self->timeline ? g_strdup_printf ("ges://%s",
GST_OBJECT_NAME (self->timeline)) : NULL;
}
static gboolean
ges_src_uri_set_uri (GstURIHandler * handler, const gchar * uri,
GError ** error)
{
return TRUE;
}
static void
ges_src_uri_handler_init (gpointer g_iface, gpointer iface_data)
{
GstURIHandlerInterface *iface = (GstURIHandlerInterface *) g_iface;
iface->get_type = ges_src_uri_get_type;
iface->get_protocols = ges_src_uri_get_protocols;
iface->get_uri = ges_src_uri_get_uri;
iface->set_uri = ges_src_uri_set_uri;
}
G_DEFINE_TYPE_WITH_CODE (GESSrc, ges_src, GST_TYPE_BIN,
G_IMPLEMENT_INTERFACE (GST_TYPE_URI_HANDLER, ges_src_uri_handler_init));
static void
ges_src_get_property (GObject * object, guint property_id,
GValue * value, GParamSpec * pspec)
{
GESSrc *self = GES_SRC (object);
switch (property_id) {
case PROP_TIMELINE:
g_value_set_object (value, self->timeline);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}
}
static void
ges_src_set_property (GObject * object, guint property_id,
const GValue * value, GParamSpec * pspec)
{
GESSrc *self = GES_SRC (object);
switch (property_id) {
case PROP_TIMELINE:
ges_src_set_timeline (self, g_value_get_object (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}
}
static void
ges_src_class_init (GESSrcClass * self_class)
{
GObjectClass *gclass = G_OBJECT_CLASS (self_class);
GstElementClass *gstelement_klass = GST_ELEMENT_CLASS (self_class);
GST_DEBUG_CATEGORY_INIT (gessrc, "gessrc", 0, "ges src element");
gclass->get_property = ges_src_get_property;
gclass->set_property = ges_src_set_property;
/**
* GESSrc:timeline:
*
* Timeline to use in this src.
*/
properties[PROP_TIMELINE] = g_param_spec_object ("timeline", "Timeline",
"Timeline to use in this src.",
GES_TYPE_TIMELINE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS);
g_object_class_install_properties (gclass, PROP_LAST, properties);
gst_element_class_add_pad_template (gstelement_klass,
gst_static_pad_template_get (&video_src_template));
gst_element_class_add_pad_template (gstelement_klass,
gst_static_pad_template_get (&audio_src_template));
}
static void
ges_src_init (GESSrc * self)
{
}