gstreamer/subprojects/gst-plugins-base/gst/playback/gstplaysinkvideoconvert.c

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/* GStreamer
* Copyright (C) <2011> Sebastian Dröge <sebastian.droege@collabora.co.uk>
*
* 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 "gstplaysinkvideoconvert.h"
#include <gst/pbutils/pbutils.h>
#include <gst/gst-i18n-plugin.h>
GST_DEBUG_CATEGORY_STATIC (gst_play_sink_video_convert_debug);
#define GST_CAT_DEFAULT gst_play_sink_video_convert_debug
#define parent_class gst_play_sink_video_convert_parent_class
G_DEFINE_TYPE (GstPlaySinkVideoConvert, gst_play_sink_video_convert,
GST_TYPE_PLAY_SINK_CONVERT_BIN);
enum
{
PROP_0,
PROP_USE_CONVERTERS,
PROP_USE_BALANCE,
};
static gboolean
gst_play_sink_video_convert_add_conversion_elements (GstPlaySinkVideoConvert *
self)
{
GstPlaySinkConvertBin *cbin = GST_PLAY_SINK_CONVERT_BIN (self);
GstElement *el, *prev = NULL;
g_assert (cbin->conversion_elements == NULL);
GST_DEBUG_OBJECT (self,
"Building video conversion with use-converters %d, use-balance %d",
self->use_converters, self->use_balance);
if (self->use_converters) {
el = gst_play_sink_convert_bin_add_conversion_element_factory (cbin,
COLORSPACE, "conv");
if (el)
prev = el;
el = gst_play_sink_convert_bin_add_conversion_element_factory (cbin,
"videoscale", "scale");
if (el) {
/* Add black borders if necessary to keep the DAR */
g_object_set (el, "add-borders", TRUE, NULL);
if (prev) {
if (!gst_element_link_pads_full (prev, "src", el, "sink",
GST_PAD_LINK_CHECK_TEMPLATE_CAPS))
goto link_failed;
}
prev = el;
}
}
if (self->use_balance && self->balance) {
el = self->balance;
gst_play_sink_convert_bin_add_conversion_element (cbin, el);
if (prev) {
if (!gst_element_link_pads_full (prev, "src", el, "sink",
GST_PAD_LINK_CHECK_TEMPLATE_CAPS))
goto link_failed;
}
prev = el;
el = gst_play_sink_convert_bin_add_conversion_element_factory (cbin,
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COLORSPACE, "conv2");
if (prev) {
if (!gst_element_link_pads_full (prev, "src", el, "sink",
GST_PAD_LINK_CHECK_TEMPLATE_CAPS))
goto link_failed;
}
if (el)
prev = el;
}
return TRUE;
link_failed:
return FALSE;
}
static void
gst_play_sink_video_convert_finalize (GObject * object)
{
GstPlaySinkVideoConvert *self = GST_PLAY_SINK_VIDEO_CONVERT_CAST (object);
if (self->balance)
gst_object_unref (self->balance);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
gst_play_sink_video_convert_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstPlaySinkVideoConvert *self = GST_PLAY_SINK_VIDEO_CONVERT_CAST (object);
gboolean v, changed = FALSE;
GST_PLAY_SINK_CONVERT_BIN_LOCK (self);
switch (prop_id) {
case PROP_USE_CONVERTERS:
v = g_value_get_boolean (value);
if (v != self->use_converters) {
self->use_converters = v;
changed = TRUE;
}
break;
case PROP_USE_BALANCE:
v = g_value_get_boolean (value);
if (v != self->use_balance) {
self->use_balance = v;
changed = TRUE;
}
break;
default:
break;
}
if (changed) {
GstPlaySinkConvertBin *cbin = GST_PLAY_SINK_CONVERT_BIN (self);
GST_DEBUG_OBJECT (self, "Rebuilding converter bin");
gst_play_sink_convert_bin_remove_elements (cbin);
gst_play_sink_video_convert_add_conversion_elements (self);
gst_play_sink_convert_bin_add_identity (cbin);
gst_play_sink_convert_bin_cache_converter_caps (cbin);
}
GST_PLAY_SINK_CONVERT_BIN_UNLOCK (self);
}
static void
gst_play_sink_video_convert_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstPlaySinkVideoConvert *self = GST_PLAY_SINK_VIDEO_CONVERT_CAST (object);
GST_PLAY_SINK_CONVERT_BIN_LOCK (self);
switch (prop_id) {
case PROP_USE_CONVERTERS:
g_value_set_boolean (value, self->use_converters);
break;
case PROP_USE_BALANCE:
g_value_set_boolean (value, self->use_balance);
break;
default:
break;
}
GST_PLAY_SINK_CONVERT_BIN_UNLOCK (self);
}
static void
gst_play_sink_video_convert_class_init (GstPlaySinkVideoConvertClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
GST_DEBUG_CATEGORY_INIT (gst_play_sink_video_convert_debug,
"playsinkvideoconvert", 0, "play bin");
gobject_class = (GObjectClass *) klass;
gstelement_class = (GstElementClass *) klass;
gobject_class->finalize = gst_play_sink_video_convert_finalize;
gobject_class->set_property = gst_play_sink_video_convert_set_property;
gobject_class->get_property = gst_play_sink_video_convert_get_property;
g_object_class_install_property (gobject_class, PROP_USE_CONVERTERS,
g_param_spec_boolean ("use-converters", "Use converters",
"Whether to use conversion elements", FALSE,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_USE_BALANCE,
g_param_spec_boolean ("use-balance", "Use balance",
"Whether to use a videobalance element", FALSE,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
gst_element_class_set_static_metadata (gstelement_class,
"Player Sink Video Converter", "Video/Bin/Converter",
"Convenience bin for video conversion",
"Sebastian Dröge <sebastian.droege@collabora.co.uk>");
}
static void
gst_play_sink_video_convert_init (GstPlaySinkVideoConvert * self)
{
GstPlaySinkConvertBin *cbin = GST_PLAY_SINK_CONVERT_BIN (self);
cbin->audio = FALSE;
/* FIXME: Only create this on demand but for now we need
* it to always exist because of playsink's color balance
* proxying logic.
*/
self->balance = gst_element_factory_make ("videobalance", "videobalance");
if (self->balance)
gst_object_ref_sink (self->balance);
gst_play_sink_video_convert_add_conversion_elements (self);
gst_play_sink_convert_bin_cache_converter_caps (cbin);
}