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/* GStreamer
* Copyright (C) 2011 David Schleef <ds@entropywave.com>
*
* 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 Street, Suite 500,
* Boston, MA 02110-1335, USA.
*/
/**
* SECTION:element-intersubsink
* @title: gstintersubsink
*
* The intersubsink element is a subtitle sink element. It is used
* in connection with a intersubsrc element in a different pipeline.
*
* ## Example launch line
* |[
* gst-launch-1.0 -v ... ! intersubsink
* ]|
*
* The intersubsink element cannot be used effectively with gst-launch-1.0,
* as it requires a second pipeline in the application to send audio.
* See the gstintertest.c example in the gst-plugins-bad source code for
* more details.
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <gst/gst.h>
#include <gst/base/gstbasesink.h>
#include "gstintersubsink.h"
GST_DEBUG_CATEGORY_STATIC (gst_inter_sub_sink_debug_category);
#define GST_CAT_DEFAULT gst_inter_sub_sink_debug_category
/* prototypes */
static void gst_inter_sub_sink_set_property (GObject * object,
guint property_id, const GValue * value, GParamSpec * pspec);
static void gst_inter_sub_sink_get_property (GObject * object,
guint property_id, GValue * value, GParamSpec * pspec);
static void gst_inter_sub_sink_finalize (GObject * object);
static void gst_inter_sub_sink_get_times (GstBaseSink * sink,
GstBuffer * buffer, GstClockTime * start, GstClockTime * end);
static gboolean gst_inter_sub_sink_start (GstBaseSink * sink);
static gboolean gst_inter_sub_sink_stop (GstBaseSink * sink);
static GstFlowReturn
gst_inter_sub_sink_render (GstBaseSink * sink, GstBuffer * buffer);
enum
{
PROP_0,
PROP_CHANNEL
};
#define DEFAULT_CHANNEL ("default")
/* pad templates */
static GstStaticPadTemplate gst_inter_sub_sink_sink_template =
GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("text/plain")
);
/* class initialization */
#define parent_class gst_inter_sub_sink_parent_class
G_DEFINE_TYPE (GstInterSubSink, gst_inter_sub_sink, GST_TYPE_BASE_SINK);
GST_ELEMENT_REGISTER_DEFINE (intersubsink, "intersubsink", GST_RANK_NONE,
GST_TYPE_INTER_SUB_SINK);
static void
gst_inter_sub_sink_class_init (GstInterSubSinkClass * klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
GstBaseSinkClass *base_sink_class = GST_BASE_SINK_CLASS (klass);
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
GST_DEBUG_CATEGORY_INIT (gst_inter_sub_sink_debug_category, "intersubsink", 0,
"debug category for intersubsink element");
gst_element_class_add_static_pad_template (element_class,
&gst_inter_sub_sink_sink_template);
gst_element_class_set_static_metadata (element_class,
"Internal subtitle sink",
"Sink/Subtitle",
"Virtual subtitle sink for internal process communication",
"David Schleef <ds@schleef.org>");
gobject_class->set_property = gst_inter_sub_sink_set_property;
gobject_class->get_property = gst_inter_sub_sink_get_property;
gobject_class->finalize = gst_inter_sub_sink_finalize;
base_sink_class->get_times = GST_DEBUG_FUNCPTR (gst_inter_sub_sink_get_times);
base_sink_class->start = GST_DEBUG_FUNCPTR (gst_inter_sub_sink_start);
base_sink_class->stop = GST_DEBUG_FUNCPTR (gst_inter_sub_sink_stop);
base_sink_class->render = GST_DEBUG_FUNCPTR (gst_inter_sub_sink_render);
g_object_class_install_property (gobject_class, PROP_CHANNEL,
g_param_spec_string ("channel", "Channel",
"Channel name to match inter src and sink elements",
DEFAULT_CHANNEL, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
}
static void
gst_inter_sub_sink_init (GstInterSubSink * intersubsink)
{
intersubsink->channel = g_strdup (DEFAULT_CHANNEL);
intersubsink->fps_n = 1;
intersubsink->fps_d = 1;
}
void
gst_inter_sub_sink_set_property (GObject * object, guint property_id,
const GValue * value, GParamSpec * pspec)
{
GstInterSubSink *intersubsink = GST_INTER_SUB_SINK (object);
switch (property_id) {
case PROP_CHANNEL:
g_free (intersubsink->channel);
intersubsink->channel = g_value_dup_string (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
void
gst_inter_sub_sink_get_property (GObject * object, guint property_id,
GValue * value, GParamSpec * pspec)
{
GstInterSubSink *intersubsink = GST_INTER_SUB_SINK (object);
switch (property_id) {
case PROP_CHANNEL:
g_value_set_string (value, intersubsink->channel);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
gst_inter_sub_sink_finalize (GObject * object)
{
GstInterSubSink *intersubsink = GST_INTER_SUB_SINK (object);
g_free (intersubsink->channel);
intersubsink->channel = NULL;
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
gst_inter_sub_sink_get_times (GstBaseSink * sink, GstBuffer * buffer,
GstClockTime * start, GstClockTime * end)
{
GstInterSubSink *intersubsink = GST_INTER_SUB_SINK (sink);
if (GST_BUFFER_TIMESTAMP_IS_VALID (buffer)) {
*start = GST_BUFFER_TIMESTAMP (buffer);
if (GST_BUFFER_DURATION_IS_VALID (buffer)) {
*end = *start + GST_BUFFER_DURATION (buffer);
} else {
if (intersubsink->fps_n > 0) {
*end = *start +
gst_util_uint64_scale_int (GST_SECOND, intersubsink->fps_d,
intersubsink->fps_n);
}
}
}
}
static gboolean
gst_inter_sub_sink_start (GstBaseSink * sink)
{
GstInterSubSink *intersubsink = GST_INTER_SUB_SINK (sink);
intersubsink->surface = gst_inter_surface_get (intersubsink->channel);
return TRUE;
}
static gboolean
gst_inter_sub_sink_stop (GstBaseSink * sink)
{
GstInterSubSink *intersubsink = GST_INTER_SUB_SINK (sink);
g_mutex_lock (&intersubsink->surface->mutex);
if (intersubsink->surface->sub_buffer) {
gst_buffer_unref (intersubsink->surface->sub_buffer);
}
intersubsink->surface->sub_buffer = NULL;
g_mutex_unlock (&intersubsink->surface->mutex);
gst_inter_surface_unref (intersubsink->surface);
intersubsink->surface = NULL;
return TRUE;
}
static GstFlowReturn
gst_inter_sub_sink_render (GstBaseSink * sink, GstBuffer * buffer)
{
GstInterSubSink *intersubsink = GST_INTER_SUB_SINK (sink);
g_mutex_lock (&intersubsink->surface->mutex);
if (intersubsink->surface->sub_buffer) {
gst_buffer_unref (intersubsink->surface->sub_buffer);
}
intersubsink->surface->sub_buffer = gst_buffer_ref (buffer);
//intersubsink->surface->sub_buffer_count = 0;
g_mutex_unlock (&intersubsink->surface->mutex);
return GST_FLOW_OK;
}
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