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276 lines
9 KiB
C
276 lines
9 KiB
C
/* GStreamer
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* Copyright 2010 ST-Ericsson SA
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* @author: Benjamin Gaignard <benjamin.gaignard@stericsson.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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/*
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* test autovideoconvert:
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* if rgb2bayer is present
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* gst-launch-1.0 videotestsrc num-buffers=2 ! "video/x-raw,width=100,height=100,framerate=10/1" ! autovideoconvert ! "video/x-bayer,width=100,height=100,format=bggr,framerate=10/1" ! fakesink -v
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* if bayer2rgb is present
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* gst-launch-1.0 videotestsrc num-buffers=2 ! "video/x-bayer,width=100,height=100,format=bggr,framerate=10/1" ! autovideoconvert ! "video/x-raw,width=100,height=100,framerate=10/1" ! fakesink -v
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* test with videoconvert
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* gst-launch-1.0 videotestsrc num-buffers=2 ! "video/x-raw,format=RGBx,width=100,height=100,framerate=10/1" ! autovideoconvert ! "video/x-raw,format=RGB16,width=100,height=100,framerate=10/1" ! fakesink -v
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <string.h>
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#include "gstautovideoconvert.h"
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GST_DEBUG_CATEGORY (autovideoconvert_debug);
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#define GST_CAT_DEFAULT (autovideoconvert_debug)
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static GMutex factories_mutex;
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static guint32 factories_cookie = 0; /* Cookie from last time when factories was updated */
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static GList *factories = NULL; /* factories we can use for selecting elements */
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/* element factory information */
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static GstStaticPadTemplate sinktemplate = GST_STATIC_PAD_TEMPLATE ("sink",
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GST_PAD_SINK,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS_ANY);
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static GstStaticPadTemplate srctemplate = GST_STATIC_PAD_TEMPLATE ("src",
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GST_PAD_SRC,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS_ANY);
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static GstStateChangeReturn gst_auto_video_convert_change_state (GstElement *
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element, GstStateChange transition);
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void gst_auto_video_convert_update_factory_list (GstAutoVideoConvert *
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autovideoconvert);
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static gboolean
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gst_auto_video_convert_element_filter (GstPluginFeature * feature,
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GstAutoVideoConvert * autovideoconvert)
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{
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const gchar *klass;
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/* we only care about element factories */
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if (G_UNLIKELY (!GST_IS_ELEMENT_FACTORY (feature)))
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return FALSE;
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klass = gst_element_factory_get_metadata (GST_ELEMENT_FACTORY_CAST (feature),
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GST_ELEMENT_METADATA_KLASS);
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/* only select color space converter */
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if (strstr (klass, "Filter") &&
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strstr (klass, "Converter") && strstr (klass, "Video")) {
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GST_DEBUG_OBJECT (autovideoconvert,
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"gst_auto_video_convert_element_filter found %s",
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gst_plugin_feature_get_name (GST_PLUGIN_FEATURE_CAST (feature)));
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return TRUE;
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}
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return FALSE;
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}
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static GList *
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gst_auto_video_convert_create_factory_list (GstAutoVideoConvert *
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autovideoconvert)
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{
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GList *result = NULL;
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/* get the feature list using the filter */
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result = gst_registry_feature_filter (gst_registry_get (),
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(GstPluginFeatureFilter) gst_auto_video_convert_element_filter,
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FALSE, autovideoconvert);
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/* sort on rank and name */
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result = g_list_sort (result, gst_plugin_feature_rank_compare_func);
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return result;
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}
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void
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gst_auto_video_convert_update_factory_list (GstAutoVideoConvert *
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autovideoconvert)
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{
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/* use a static mutex to protect factories list and factories cookie */
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g_mutex_lock (&factories_mutex);
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/* test if a factories list already exist or not */
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if (!factories) {
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/* no factories list create it */
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factories_cookie =
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gst_registry_get_feature_list_cookie (gst_registry_get ());
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factories = gst_auto_video_convert_create_factory_list (autovideoconvert);
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} else {
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/* a factories list exist but is it up to date? */
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if (factories_cookie !=
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gst_registry_get_feature_list_cookie (gst_registry_get ())) {
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/* we need to update the factories list */
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/* first free the old one */
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gst_plugin_feature_list_free (factories);
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/* then create an updated one */
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factories_cookie =
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gst_registry_get_feature_list_cookie (gst_registry_get ());
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factories = gst_auto_video_convert_create_factory_list (autovideoconvert);
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}
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}
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g_mutex_unlock (&factories_mutex);
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}
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G_DEFINE_TYPE (GstAutoVideoConvert, gst_auto_video_convert, GST_TYPE_BIN);
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static void
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gst_auto_video_convert_class_init (GstAutoVideoConvertClass * klass)
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{
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GstElementClass *gstelement_class = (GstElementClass *) klass;
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GST_DEBUG_CATEGORY_INIT (autovideoconvert_debug, "autovideoconvert", 0,
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"Auto color space converter");
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gst_element_class_add_static_pad_template (gstelement_class, &srctemplate);
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gst_element_class_add_static_pad_template (gstelement_class, &sinktemplate);
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gst_element_class_set_static_metadata (gstelement_class,
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"Select color space converter based on caps", "Generic/Bin",
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"Selects the right color space converter based on the caps",
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"Benjamin Gaignard <benjamin.gaignard@stericsson.com>");
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gstelement_class->change_state =
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GST_DEBUG_FUNCPTR (gst_auto_video_convert_change_state);
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}
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static gboolean
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gst_auto_video_convert_add_autoconvert (GstAutoVideoConvert * autovideoconvert)
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{
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GstPad *pad;
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if (autovideoconvert->autoconvert)
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return TRUE;
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autovideoconvert->autoconvert =
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gst_element_factory_make ("autoconvert", "autoconvertchild");
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if (!autovideoconvert->autoconvert) {
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GST_ERROR_OBJECT (autovideoconvert,
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"Could not create autoconvert instance");
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return FALSE;
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}
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/* first add autoconvert in bin */
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gst_bin_add (GST_BIN (autovideoconvert),
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gst_object_ref (autovideoconvert->autoconvert));
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/* get sinkpad and link it to ghost sink pad */
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pad = gst_element_get_static_pad (autovideoconvert->autoconvert, "sink");
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gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (autovideoconvert->sinkpad),
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pad);
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gst_object_unref (pad);
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/* get srcpad and link it to ghost src pad */
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pad = gst_element_get_static_pad (autovideoconvert->autoconvert, "src");
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gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (autovideoconvert->srcpad), pad);
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gst_object_unref (pad);
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return TRUE;
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}
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static void
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gst_auto_video_convert_remove_autoconvert (GstAutoVideoConvert *
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autovideoconvert)
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{
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if (!autovideoconvert->autoconvert)
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return;
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gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (autovideoconvert->srcpad),
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NULL);
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gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (autovideoconvert->sinkpad),
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NULL);
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gst_bin_remove (GST_BIN (autovideoconvert), autovideoconvert->autoconvert);
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gst_object_unref (autovideoconvert->autoconvert);
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autovideoconvert->autoconvert = NULL;
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}
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static void
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gst_auto_video_convert_init (GstAutoVideoConvert * autovideoconvert)
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{
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GstPadTemplate *pad_tmpl;
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/* get sink pad template */
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pad_tmpl = gst_static_pad_template_get (&sinktemplate);
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autovideoconvert->sinkpad =
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gst_ghost_pad_new_no_target_from_template ("sink", pad_tmpl);
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/* add sink ghost pad */
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gst_element_add_pad (GST_ELEMENT (autovideoconvert),
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autovideoconvert->sinkpad);
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gst_object_unref (pad_tmpl);
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/* get src pad template */
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pad_tmpl = gst_static_pad_template_get (&srctemplate);
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autovideoconvert->srcpad =
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gst_ghost_pad_new_no_target_from_template ("src", pad_tmpl);
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/* add src ghost pad */
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gst_element_add_pad (GST_ELEMENT (autovideoconvert),
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autovideoconvert->srcpad);
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gst_object_unref (pad_tmpl);
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return;
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}
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static GstStateChangeReturn
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gst_auto_video_convert_change_state (GstElement * element,
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GstStateChange transition)
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{
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GstAutoVideoConvert *autovideoconvert = GST_AUTO_VIDEO_CONVERT (element);
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GstStateChangeReturn ret;
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switch (transition) {
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case GST_STATE_CHANGE_NULL_TO_READY:
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{
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/* create and add autoconvert in bin */
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if (!gst_auto_video_convert_add_autoconvert (autovideoconvert)) {
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ret = GST_STATE_CHANGE_FAILURE;
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return ret;
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}
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/* get an updated list of factories */
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gst_auto_video_convert_update_factory_list (autovideoconvert);
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GST_DEBUG_OBJECT (autovideoconvert, "set factories list");
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/* give factory list to autoconvert */
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g_object_set (GST_ELEMENT (autovideoconvert->autoconvert), "factories",
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factories, NULL);
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break;
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}
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default:
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break;
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}
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ret = GST_ELEMENT_CLASS (gst_auto_video_convert_parent_class)->change_state
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(element, transition);
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if (ret == GST_STATE_CHANGE_FAILURE)
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return ret;
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switch (transition) {
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case GST_STATE_CHANGE_READY_TO_NULL:
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{
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gst_auto_video_convert_remove_autoconvert (autovideoconvert);
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break;
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}
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default:
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break;
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}
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return ret;
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}
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