gstreamer/subprojects/gst-plugins-bad/gst-libs/gst/mse/gstmseeventqueue.c

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/* GStreamer
*
* SPDX-License-Identifier: LGPL-2.1
*
* Copyright (C) 2023 Collabora Ltd.
*
* 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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <gst/base/gstdataqueue.h>
#include <gst/mse/mse-prelude.h>
#include "gstmseeventqueue-private.h"
struct _GstMseEventQueue
{
GstObject parent_instance;
GstMseEventQueueCallback callback;
gpointer user_data;
GstTask *task;
GRecMutex lock;
GstDataQueue *queue;
};
G_DEFINE_TYPE (GstMseEventQueue, gst_mse_event_queue, GST_TYPE_OBJECT);
GstMseEventQueue *
gst_mse_event_queue_new (GstMseEventQueueCallback callback, gpointer user_data)
{
g_return_val_if_fail (callback != NULL, NULL);
GstMseEventQueue *self = g_object_new (GST_TYPE_MSE_EVENT_QUEUE, NULL);
self->callback = callback;
self->user_data = user_data;
gst_task_start (self->task);
return g_object_ref_sink (self);
}
static void
gst_mse_background_event_queue_dispose (GObject * obj)
{
GstMseEventQueue *self = GST_MSE_EVENT_QUEUE (obj);
gst_data_queue_set_flushing (self->queue, TRUE);
gst_data_queue_flush (self->queue);
G_OBJECT_CLASS (gst_mse_event_queue_parent_class)->dispose (obj);
}
static void
gst_mse_background_event_queue_finalize (GObject * obj)
{
GstMseEventQueue *self = GST_MSE_EVENT_QUEUE (obj);
gst_task_join (self->task);
g_rec_mutex_clear (&self->lock);
gst_clear_object (&self->task);
gst_clear_object (&self->queue);
G_OBJECT_CLASS (gst_mse_event_queue_parent_class)->finalize (obj);
}
void
gst_mse_event_queue_class_init (GstMseEventQueueClass * klass)
{
GObjectClass *oclass = G_OBJECT_CLASS (klass);
oclass->dispose = GST_DEBUG_FUNCPTR (gst_mse_background_event_queue_dispose);
oclass->finalize =
GST_DEBUG_FUNCPTR (gst_mse_background_event_queue_finalize);
}
static void
task_func (GstMseEventQueue * self)
{
GstTask *task = self->task;
GstDataQueue *queue = self->queue;
GstDataQueueItem *item = NULL;
if (!gst_data_queue_pop (queue, &item)) {
gst_task_stop (task);
return;
}
self->callback (item, self->user_data);
if (item->destroy) {
item->destroy (item);
}
}
static gboolean
never_full (GstDataQueue * queue, guint visible, guint bytes, guint64 time,
gpointer user_data)
{
return FALSE;
}
void
gst_mse_event_queue_init (GstMseEventQueue * self)
{
self->queue = gst_data_queue_new (never_full, NULL, NULL, NULL);
self->task = gst_task_new ((GstTaskFunction) task_func, self, NULL);
g_rec_mutex_init (&self->lock);
gst_task_set_lock (self->task, &self->lock);
}
gboolean
gst_mse_event_queue_push (GstMseEventQueue * self, GstDataQueueItem * item)
{
g_return_val_if_fail (GST_IS_MSE_EVENT_QUEUE (self), FALSE);
g_return_val_if_fail (item != NULL, FALSE);
return gst_data_queue_push (self->queue, item);
}