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310 lines
9 KiB
C
310 lines
9 KiB
C
/* GStreamer GES plugin
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*
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* Copyright (C) 2019 Thibault Saunier <tsaunier@igalia.com>
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*
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* gesbasebin.h
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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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#include "gesbasebin.h"
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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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typedef struct
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{
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GESTimeline *timeline;
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GstFlowCombiner *flow_combiner;
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} GESBaseBinPrivate;
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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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G_DEFINE_TYPE_WITH_PRIVATE (GESBaseBin, ges_base_bin, GST_TYPE_BIN);
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GST_DEBUG_CATEGORY_STATIC (gesbasebin);
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#define GST_CAT_DEFAULT gesbasebin
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static void
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ges_base_bin_dispose (GObject * object)
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{
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GESBaseBin *self = GES_BASE_BIN (object);
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GESBaseBinPrivate *priv = ges_base_bin_get_instance_private (self);
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if (priv->timeline)
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gst_clear_object (&priv->timeline);
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}
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static void
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ges_base_bin_finalize (GObject * object)
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{
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GESBaseBin *self = GES_BASE_BIN (object);
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GESBaseBinPrivate *priv = ges_base_bin_get_instance_private (self);
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gst_flow_combiner_free (priv->flow_combiner);
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}
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static void
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ges_base_bin_get_property (GObject * object, guint property_id,
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GValue * value, GParamSpec * pspec)
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{
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GESBaseBin *self = GES_BASE_BIN (object);
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GESBaseBinPrivate *priv = ges_base_bin_get_instance_private (self);
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switch (property_id) {
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case PROP_TIMELINE:
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g_value_set_object (value, priv->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_base_bin_set_property (GObject * object, guint property_id,
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const GValue * value, GParamSpec * pspec)
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{
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GESBaseBin *self = GES_BASE_BIN (object);
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switch (property_id) {
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case PROP_TIMELINE:
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ges_base_bin_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_base_bin_class_init (GESBaseBinClass * 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 (gesbasebin, "gesbasebin", 0, "ges bin element");
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gst_tag_register ("is-ges-timeline", GST_TAG_FLAG_META, G_TYPE_BOOLEAN,
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"is-ges-timeline", "The stream is a ges timeline.", NULL);
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gclass->get_property = ges_base_bin_get_property;
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gclass->set_property = ges_base_bin_set_property;
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gclass->dispose = ges_base_bin_dispose;
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gclass->finalize = ges_base_bin_finalize;
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/**
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* GESBaseBin:timeline:
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*
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* Timeline to use in this bin.
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*
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* Since: 1.16
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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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gst_type_mark_as_plugin_api (ges_base_bin_get_type (), 0);
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}
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static void
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ges_base_bin_init (GESBaseBin * self)
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{
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GESBaseBinPrivate *priv = ges_base_bin_get_instance_private (self);
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ges_init ();
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priv->flow_combiner = gst_flow_combiner_new ();
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}
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static gboolean
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ges_base_bin_event (GstPad * pad, GstObject * parent, GstEvent * event)
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{
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switch (GST_EVENT_TYPE (event)) {
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case GST_EVENT_STREAM_START:
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{
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const gchar *stream_id;
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gchar *new_stream_id;
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guint stream_group;
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GstTagList *tlist = gst_tag_list_new ("is-ges-timeline", TRUE, NULL);
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GstPad *peer = gst_pad_get_peer (pad);
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GstEvent *new_event;
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gst_event_parse_stream_start (event, &stream_id);
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new_stream_id =
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gst_pad_create_stream_id (peer,
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GST_ELEMENT (GST_OBJECT_PARENT (parent)), stream_id);
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gst_object_unref (peer);
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new_event = gst_event_new_stream_start (new_stream_id);
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if (gst_event_parse_group_id (event, &stream_group))
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gst_event_set_group_id (new_event, stream_group);
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gst_event_unref (event);
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g_free (new_stream_id);
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gst_pad_event_default (pad, parent, new_event);
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gst_tag_list_set_scope (tlist, GST_TAG_SCOPE_GLOBAL);
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return gst_pad_send_event (pad, gst_event_new_tag (tlist));
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}
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default:
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break;
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}
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return gst_pad_event_default (pad, parent, event);
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}
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static GstFlowReturn
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ges_base_bin_src_chain (GstPad * pad, GstObject * parent, GstBuffer * buffer)
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{
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GstFlowReturn result, chain_result;
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GESBaseBin *self = GES_BASE_BIN (GST_OBJECT_PARENT (parent));
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GESBaseBinPrivate *priv = ges_base_bin_get_instance_private (self);
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chain_result = gst_proxy_pad_chain_default (pad, GST_OBJECT (self), buffer);
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result =
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gst_flow_combiner_update_pad_flow (priv->flow_combiner, pad,
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chain_result);
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if (result == GST_FLOW_FLUSHING)
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return chain_result;
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return result;
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}
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gboolean
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ges_base_bin_set_timeline (GESBaseBin * 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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GESBaseBinPrivate *priv = ges_base_bin_get_instance_private (self);
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g_return_val_if_fail (GES_IS_TIMELINE (timeline), FALSE);
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if (priv->timeline) {
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GST_ERROR_OBJECT (sbin, "Implement changing timeline support");
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return FALSE;
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}
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priv->timeline = gst_object_ref (timeline);
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GST_INFO_OBJECT (sbin, "Setting timeline: %" GST_PTR_FORMAT, timeline);
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gst_element_set_locked_state (GST_ELEMENT (timeline), TRUE);
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if (!gst_bin_add (sbin, GST_ELEMENT (timeline))) {
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GST_ERROR_OBJECT (sbin, "Could not add timeline to myself!");
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return FALSE;
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}
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ges_timeline_commit (timeline);
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for (tmp = 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 *proxy_pad, *tmppad, *pad =
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ges_timeline_get_pad_for_track (timeline, track);
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GstStaticPadTemplate *template;
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if (!pad) {
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GST_WARNING_OBJECT (sbin, "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 (sbin, "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 (sbin, queue);
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gst_element_sync_state_with_parent (GST_ELEMENT (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_OBJECT (sbin, "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 (sbin), gpad);
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proxy_pad = GST_PAD (gst_proxy_pad_get_internal (GST_PROXY_PAD (gpad)));
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gst_flow_combiner_add_pad (priv->flow_combiner, proxy_pad);
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gst_pad_set_chain_function (proxy_pad, ges_base_bin_src_chain);
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gst_pad_set_event_function (proxy_pad, ges_base_bin_event);
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gst_object_unref (proxy_pad);
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GST_DEBUG_OBJECT (sbin, "Adding pad: %" GST_PTR_FORMAT, gpad);
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}
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gst_element_set_locked_state (GST_ELEMENT (timeline), FALSE);
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gst_element_no_more_pads (GST_ELEMENT (sbin));
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gst_element_sync_state_with_parent (GST_ELEMENT (timeline));
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return TRUE;
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}
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GESTimeline *
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ges_base_bin_get_timeline (GESBaseBin * self)
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{
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GESBaseBinPrivate *priv = ges_base_bin_get_instance_private (self);
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return priv->timeline;
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}
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