gstreamer/subprojects/gst-plugins-bad/gst/autoconvert/gstautovideo.c
Thibault Saunier e41e31f2ae auto: Add a gstautodeinterlace element
Which can do colorspace conversion if necessary.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/899>
2024-01-31 11:00:24 +00:00

117 lines
3.4 KiB
C

/* GStreamer
* Copyright 2023 Igalia S.L.
* @author: Thibault Saunier <tsaunier@igalia.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 St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <string.h>
#include "gstautovideo.h"
GST_DEBUG_CATEGORY (autovideo_debug);
#define GST_CAT_DEFAULT (autovideo_debug)
static gboolean
append_elements (GString * name, GString * bindesc,
const gchar * const *elements)
{
if (!elements) {
/* Nothing to do. */
return TRUE;
}
for (gint i = 0; elements[i]; i++) {
gchar **e = g_strsplit (elements[i], " ", 2);
GstElementFactory *factory = gst_element_factory_find (g_strchomp (e[0]));
if (!factory) {
GST_DEBUG_OBJECT (NULL, "Factory %s not found: %s", e[0], elements[i]);
g_strfreev (e);
return FALSE;
}
if (name) {
g_string_append (name, e[0]);
}
g_strfreev (e);
if (bindesc->len > 0) {
g_string_append (bindesc, " ! ");
}
g_string_append (bindesc, elements[i]);
}
return TRUE;
}
static void
register_known_bin (GstBaseAutoConvert * self,
const gchar * const *first_elements,
const gchar * const *colorspace_converters,
const gchar * const *last_elements,
const gchar * const *filters, GstRank rank)
{
GString *name = g_string_new ("autovideoconvert-");
GString *bindesc = g_string_new ("");
if (!append_elements (name, bindesc, first_elements))
goto abort;
if (!append_elements (name, bindesc, colorspace_converters))
goto abort;
for (gint i = 0; filters && filters[i]; i++) {
const gchar *tmp[2] = { filters[i], NULL };
if (!append_elements (name, bindesc, tmp))
goto abort;
if (!append_elements (NULL, bindesc, colorspace_converters))
goto abort;
}
if (!append_elements (name, bindesc, last_elements))
goto abort;
gst_base_auto_convert_register_filter (GST_BASE_AUTO_CONVERT (self),
g_string_free (name, FALSE), g_string_free (bindesc, FALSE), rank);
return;
abort:
g_string_free (name, TRUE);
g_string_free (bindesc, TRUE);
}
void
gst_auto_video_register_well_known_bins (GstBaseAutoConvert * self,
const GstAutoVideoFilterGenerator * gen)
{
static gsize gst_auto_video_register_well_known_bins_once = 0;
if (g_once_init_enter (&gst_auto_video_register_well_known_bins_once)) {
GST_DEBUG_CATEGORY_INIT (autovideo_debug, "autovideo", 0, "Auto video");
g_once_init_leave (&gst_auto_video_register_well_known_bins_once, TRUE);
}
for (gint i = 0; gen[i].colorspace_converters[0] || gen[i].first_elements[0]
|| gen[i].last_elements[0] || gen[i].filters[0]; i++) {
register_known_bin (self, gen[i].first_elements,
gen[i].colorspace_converters, gen[i].last_elements, gen[i].filters,
gen[i].rank);
}
}