gstreamer/gst-libs/gst/app/gstappsink.c

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/* GStreamer
* Copyright (C) 2007 David Schleef <ds@schleef.org>
*
* 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., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <gst/gst.h>
#include <gst/base/gstbasesink.h>
#include <string.h>
#include "gstappsink.h"
GST_DEBUG_CATEGORY (app_sink_debug);
#define GST_CAT_DEFAULT app_sink_debug
static const GstElementDetails app_sink_details =
GST_ELEMENT_DETAILS ("AppSink",
"FIXME",
"FIXME",
"autogenerated by makefilter");
enum
{
PROP_0
};
static GstStaticPadTemplate gst_app_sink_template =
GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS_ANY);
static void gst_app_sink_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_app_sink_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static void gst_app_sink_dispose (GObject * object);
static gboolean gst_app_sink_start (GstBaseSink * psink);
static gboolean gst_app_sink_stop (GstBaseSink * psink);
static gboolean gst_app_sink_event (GstBaseSink * sink, GstEvent * event);
static GstFlowReturn gst_app_sink_render (GstBaseSink * psink,
GstBuffer * buffer);
GST_BOILERPLATE (GstAppSink, gst_app_sink, GstBaseSink, GST_TYPE_BASE_SINK);
static void
gst_app_sink_base_init (gpointer g_class)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
//GObjectClass *gobject_class = G_OBJECT_CLASS (g_class);
GST_DEBUG_CATEGORY_INIT (app_sink_debug, "appsink", 0, "appsink element");
gst_element_class_set_details (element_class, &app_sink_details);
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_app_sink_template));
}
static void
gst_app_sink_class_init (GstAppSinkClass * klass)
{
GObjectClass *gobject_class = (GObjectClass *) klass;
GstBaseSinkClass *basesink_class = (GstBaseSinkClass *) klass;
gobject_class->set_property = gst_app_sink_set_property;
gobject_class->get_property = gst_app_sink_get_property;
gobject_class->dispose = gst_app_sink_dispose;
basesink_class->start = gst_app_sink_start;
basesink_class->stop = gst_app_sink_stop;
basesink_class->event = gst_app_sink_event;
basesink_class->render = gst_app_sink_render;
}
static void
gst_app_sink_dispose (GObject * obj)
{
GstAppSink *appsink = GST_APP_SINK (obj);
if (appsink->caps) {
gst_caps_unref (appsink->caps);
appsink->caps = NULL;
}
if (appsink->mutex) {
g_mutex_free (appsink->mutex);
appsink->mutex = NULL;
}
if (appsink->cond) {
g_cond_free (appsink->cond);
appsink->cond = NULL;
}
if (appsink->queue) {
g_queue_free (appsink->queue);
appsink->queue = NULL;
}
G_OBJECT_CLASS (parent_class)->dispose (obj);
}
static void
gst_app_sink_init (GstAppSink * appsink, GstAppSinkClass * klass)
{
appsink->mutex = g_mutex_new ();
appsink->cond = g_cond_new ();
appsink->queue = g_queue_new ();
}
static void
gst_app_sink_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstAppSink *appsink = GST_APP_SINK (object);
GST_OBJECT_LOCK (appsink);
switch (prop_id) {
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
GST_OBJECT_UNLOCK (appsink);
}
static void
gst_app_sink_get_property (GObject * object, guint prop_id, GValue * value,
GParamSpec * pspec)
{
GstAppSink *appsink = GST_APP_SINK (object);
GST_OBJECT_LOCK (appsink);
switch (prop_id) {
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
GST_OBJECT_UNLOCK (appsink);
}
static gboolean
gst_app_sink_start (GstBaseSink * psink)
{
GstAppSink *appsink = GST_APP_SINK (psink);
appsink->end_of_stream = FALSE;
return TRUE;
}
static gboolean
gst_app_sink_stop (GstBaseSink * psink)
{
//GstAppSink *appsink = GST_APP_SINK(psink);
return TRUE;
}
static gboolean
gst_app_sink_event (GstBaseSink * sink, GstEvent * event)
{
GstAppSink *appsink = GST_APP_SINK (sink);
switch (event->type) {
case GST_EVENT_EOS:
appsink->end_of_stream = TRUE;
break;
default:
break;
}
gst_object_unref (sink);
return FALSE;
}
static GstFlowReturn
gst_app_sink_render (GstBaseSink * psink, GstBuffer * buffer)
{
GstAppSink *appsink = GST_APP_SINK (psink);
g_mutex_lock (appsink->mutex);
g_queue_push_tail (appsink->queue, gst_buffer_ref (buffer));
g_cond_signal (appsink->cond);
g_mutex_unlock (appsink->mutex);
return GST_FLOW_OK;
}
/* external API */
/**
* gst_app_sink_set_caps:
* @appsink:
* @caps:
*
* Set the capabilities on the appsink element. This function takes
* ownership of the caps structure.
*/
void
gst_app_sink_set_caps (GstAppSink * appsink, GstCaps * caps)
{
g_return_if_fail (appsink != NULL);
g_return_if_fail (GST_IS_APP_SINK (appsink));
gst_caps_replace (&appsink->caps, caps);
}
gboolean
gst_app_sink_end_of_stream (GstAppSink * appsink)
{
gboolean ret;
g_return_val_if_fail (appsink != NULL, FALSE);
g_return_val_if_fail (GST_IS_APP_SINK (appsink), FALSE);
g_mutex_lock (appsink->mutex);
if (appsink->end_of_stream && g_queue_is_empty (appsink->queue)) {
ret = TRUE;
} else {
ret = FALSE;
}
g_mutex_unlock (appsink->mutex);
return ret;
}
GstBuffer *
gst_app_sink_pull_buffer (GstAppSink * appsink)
{
GstBuffer *buf = NULL;
g_return_val_if_fail (appsink != NULL, NULL);
g_return_val_if_fail (GST_IS_APP_SINK (appsink), NULL);
g_mutex_lock (appsink->mutex);
while (g_queue_is_empty (appsink->queue)) {
if (appsink->end_of_stream)
goto out;
g_cond_wait (appsink->cond, appsink->mutex);
}
buf = g_queue_pop_head (appsink->queue);
out:
g_mutex_unlock (appsink->mutex);
return buf;
}