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