gst/autoconvert/gstautovideoconvert.c - imx-gst-plugins-bad - Git at Google

 /* GStreamer
  * Copyright 2010 ST-Ericsson SA
  *  @author: Benjamin Gaignard <benjamin.gaignard@stericsson.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.
  */
 /*
  * test autovideoconvert:
  * if rgb2bayer is present
  * 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
  * if bayer2rgb is present
  * 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
  * test with videoconvert
  * 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
  */
 #ifdef HAVE_CONFIG_H
 #include "config.h"
 #endif

 #include <string.h>

 #include "gstautovideoconvert.h"

 GST_DEBUG_CATEGORY (autovideoconvert_debug);
 #define GST_CAT_DEFAULT (autovideoconvert_debug)

 static GMutex factories_mutex;
 static guint32 factories_cookie = 0;    /* Cookie from last time when factories was updated */
 static GList *factories = NULL; /* factories we can use for selecting elements */

 /* element factory information */
 static GstStaticPadTemplate sinktemplate = GST_STATIC_PAD_TEMPLATE ("sink",
     GST_PAD_SINK,
     GST_PAD_ALWAYS,
     GST_STATIC_CAPS_ANY);

 static GstStaticPadTemplate srctemplate = GST_STATIC_PAD_TEMPLATE ("src",
     GST_PAD_SRC,
     GST_PAD_ALWAYS,
     GST_STATIC_CAPS_ANY);


 static GstStateChangeReturn gst_auto_video_convert_change_state (GstElement *
     element, GstStateChange transition);

 void gst_auto_video_convert_update_factory_list (GstAutoVideoConvert *
     autovideoconvert);

 static gboolean
 gst_auto_video_convert_element_filter (GstPluginFeature * feature,
     GstAutoVideoConvert * autovideoconvert)
 {
   const gchar *klass;

   /* we only care about element factories */
   if (G_UNLIKELY (!GST_IS_ELEMENT_FACTORY (feature)))
     return FALSE;

   klass = gst_element_factory_get_metadata (GST_ELEMENT_FACTORY_CAST (feature),
       GST_ELEMENT_METADATA_KLASS);
   /* only select color space converter */
   if (strstr (klass, "Filter") &&
       strstr (klass, "Converter") && strstr (klass, "Video")) {
     GST_DEBUG_OBJECT (autovideoconvert,
         "gst_auto_video_convert_element_filter found %s\n",
         gst_plugin_feature_get_name (GST_PLUGIN_FEATURE_CAST (feature)));
     return TRUE;
   }
   return FALSE;
 }


 static GList *
 gst_auto_video_convert_create_factory_list (GstAutoVideoConvert *
     autovideoconvert)
 {
   GList *result = NULL;

   /* get the feature list using the filter */
   result = gst_registry_feature_filter (gst_registry_get (),
       (GstPluginFeatureFilter) gst_auto_video_convert_element_filter,
       FALSE, autovideoconvert);

   /* sort on rank and name */
   result = g_list_sort (result, gst_plugin_feature_rank_compare_func);

   return result;
 }

 void
 gst_auto_video_convert_update_factory_list (GstAutoVideoConvert *
     autovideoconvert)
 {
   /* use a static mutex to protect factories list and factories cookie */
   g_mutex_lock (&factories_mutex);

   /* test if a factories list already exist or not */
   if (!factories) {
     /* no factories list create it */
     factories_cookie =
         gst_registry_get_feature_list_cookie (gst_registry_get ());
     factories = gst_auto_video_convert_create_factory_list (autovideoconvert);
   } else {
     /* a factories list exist but is it up to date? */
     if (factories_cookie !=
         gst_registry_get_feature_list_cookie (gst_registry_get ())) {
       /* we need to update the factories list */
       /* first free the old one */
       gst_plugin_feature_list_free (factories);
       /* then create an updated one */
       factories_cookie =
           gst_registry_get_feature_list_cookie (gst_registry_get ());
       factories = gst_auto_video_convert_create_factory_list (autovideoconvert);
     }
   }

   g_mutex_unlock (&factories_mutex);
 }

 G_DEFINE_TYPE (GstAutoVideoConvert, gst_auto_video_convert, GST_TYPE_BIN);

 static void
 gst_auto_video_convert_class_init (GstAutoVideoConvertClass * klass)
 {
   GstElementClass *gstelement_class = (GstElementClass *) klass;

   GST_DEBUG_CATEGORY_INIT (autovideoconvert_debug, "autovideoconvert", 0,
       "Auto color space converter");

   gst_element_class_add_static_pad_template (gstelement_class, &srctemplate);
   gst_element_class_add_static_pad_template (gstelement_class, &sinktemplate);

   gst_element_class_set_static_metadata (gstelement_class,
       "Select color space convertor based on caps", "Generic/Bin",
       "Selects the right color space convertor based on the caps",
       "Benjamin Gaignard <benjamin.gaignard@stericsson.com>");

   gstelement_class->change_state =
       GST_DEBUG_FUNCPTR (gst_auto_video_convert_change_state);

 }

 static gboolean
 gst_auto_video_convert_add_autoconvert (GstAutoVideoConvert * autovideoconvert)
 {
   GstPad *pad;

   if (autovideoconvert->autoconvert)
     return TRUE;

   autovideoconvert->autoconvert =
       gst_element_factory_make ("autoconvert", "autoconvertchild");
   if (!autovideoconvert->autoconvert) {
     GST_ERROR_OBJECT (autovideoconvert,
         "Could not create autoconvert instance");
     return FALSE;
   }

   /* first add autoconvert in bin */
   gst_bin_add (GST_BIN (autovideoconvert),
       gst_object_ref (autovideoconvert->autoconvert));

   /* get sinkpad and link it to ghost sink pad */
   pad = gst_element_get_static_pad (autovideoconvert->autoconvert, "sink");
   gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (autovideoconvert->sinkpad),
       pad);
   gst_object_unref (pad);

   /* get srcpad and link it to ghost src pad */
   pad = gst_element_get_static_pad (autovideoconvert->autoconvert, "src");
   gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (autovideoconvert->srcpad), pad);
   gst_object_unref (pad);

   return TRUE;
 }

 static void
 gst_auto_video_convert_remove_autoconvert (GstAutoVideoConvert *
     autovideoconvert)
 {
   if (!autovideoconvert->autoconvert)
     return;

   gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (autovideoconvert->srcpad),
       NULL);
   gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (autovideoconvert->sinkpad),
       NULL);

   gst_bin_remove (GST_BIN (autovideoconvert), autovideoconvert->autoconvert);
   gst_object_unref (autovideoconvert->autoconvert);
   autovideoconvert->autoconvert = NULL;
 }

 static void
 gst_auto_video_convert_init (GstAutoVideoConvert * autovideoconvert)
 {
   GstPadTemplate *pad_tmpl;

   /* get sink pad template */
   pad_tmpl = gst_static_pad_template_get (&sinktemplate);
   autovideoconvert->sinkpad =
       gst_ghost_pad_new_no_target_from_template ("sink", pad_tmpl);
   /* add sink ghost pad */
   gst_element_add_pad (GST_ELEMENT (autovideoconvert),
       autovideoconvert->sinkpad);
   gst_object_unref (pad_tmpl);

   /* get src pad template */
   pad_tmpl = gst_static_pad_template_get (&srctemplate);
   autovideoconvert->srcpad =
       gst_ghost_pad_new_no_target_from_template ("src", pad_tmpl);
   /* add src ghost pad */
   gst_element_add_pad (GST_ELEMENT (autovideoconvert),
       autovideoconvert->srcpad);
   gst_object_unref (pad_tmpl);

   return;
 }

 static GstStateChangeReturn
 gst_auto_video_convert_change_state (GstElement * element,
     GstStateChange transition)
 {
   GstAutoVideoConvert *autovideoconvert = GST_AUTO_VIDEO_CONVERT (element);
   GstStateChangeReturn ret;

   switch (transition) {
     case GST_STATE_CHANGE_NULL_TO_READY:
     {
       /* create and add autoconvert in bin */
       if (!gst_auto_video_convert_add_autoconvert (autovideoconvert)) {
         ret = GST_STATE_CHANGE_FAILURE;
         return ret;
       }
       /* get an updated list of factories */
       gst_auto_video_convert_update_factory_list (autovideoconvert);
       GST_DEBUG_OBJECT (autovideoconvert, "set factories list");
       /* give factory list to autoconvert */
       g_object_set (GST_ELEMENT (autovideoconvert->autoconvert), "factories",
           factories, NULL);
       break;
     }
     default:
       break;
   }

   ret = GST_ELEMENT_CLASS (gst_auto_video_convert_parent_class)->change_state
       (element, transition);
   if (ret == GST_STATE_CHANGE_FAILURE)
     return ret;

   switch (transition) {
     case GST_STATE_CHANGE_READY_TO_NULL:
     {
       gst_auto_video_convert_remove_autoconvert (autovideoconvert);
       break;
     }
     default:
       break;
   }

   return ret;
 }
	/* GStreamer
	* Copyright 2010 ST-Ericsson SA
	* @author: Benjamin Gaignard <benjamin.gaignard@stericsson.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.
	*/
	/*
	* test autovideoconvert:
	* if rgb2bayer is present
	* 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
	* if bayer2rgb is present
	* 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
	* test with videoconvert
	* 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
	*/
	#ifdef HAVE_CONFIG_H
	#include "config.h"
	#endif

	#include <string.h>

	#include "gstautovideoconvert.h"

	GST_DEBUG_CATEGORY (autovideoconvert_debug);
	#define GST_CAT_DEFAULT (autovideoconvert_debug)

	static GMutex factories_mutex;
	static guint32 factories_cookie = 0; /* Cookie from last time when factories was updated */
	static GList factories = NULL; / factories we can use for selecting elements */

	/* element factory information */
	static GstStaticPadTemplate sinktemplate = GST_STATIC_PAD_TEMPLATE ("sink",
	GST_PAD_SINK,
	GST_PAD_ALWAYS,
	GST_STATIC_CAPS_ANY);

	static GstStaticPadTemplate srctemplate = GST_STATIC_PAD_TEMPLATE ("src",
	GST_PAD_SRC,
	GST_PAD_ALWAYS,
	GST_STATIC_CAPS_ANY);


	static GstStateChangeReturn gst_auto_video_convert_change_state (GstElement *
	element, GstStateChange transition);

	void gst_auto_video_convert_update_factory_list (GstAutoVideoConvert *
	autovideoconvert);

	static gboolean
	gst_auto_video_convert_element_filter (GstPluginFeature * feature,
	GstAutoVideoConvert * autovideoconvert)
	{
	const gchar *klass;

	/* we only care about element factories */
	if (G_UNLIKELY (!GST_IS_ELEMENT_FACTORY (feature)))
	return FALSE;

	klass = gst_element_factory_get_metadata (GST_ELEMENT_FACTORY_CAST (feature),
	GST_ELEMENT_METADATA_KLASS);
	/* only select color space converter */
	if (strstr (klass, "Filter") &&
	strstr (klass, "Converter") && strstr (klass, "Video")) {
	GST_DEBUG_OBJECT (autovideoconvert,
	"gst_auto_video_convert_element_filter found %s\n",
	gst_plugin_feature_get_name (GST_PLUGIN_FEATURE_CAST (feature)));
	return TRUE;
	}
	return FALSE;
	}


	static GList *
	gst_auto_video_convert_create_factory_list (GstAutoVideoConvert *
	autovideoconvert)
	{
	GList *result = NULL;

	/* get the feature list using the filter */
	result = gst_registry_feature_filter (gst_registry_get (),
	(GstPluginFeatureFilter) gst_auto_video_convert_element_filter,
	FALSE, autovideoconvert);

	/* sort on rank and name */
	result = g_list_sort (result, gst_plugin_feature_rank_compare_func);

	return result;
	}

	void
	gst_auto_video_convert_update_factory_list (GstAutoVideoConvert *
	autovideoconvert)
	{
	/* use a static mutex to protect factories list and factories cookie */
	g_mutex_lock (&factories_mutex);

	/* test if a factories list already exist or not */
	if (!factories) {
	/* no factories list create it */
	factories_cookie =
	gst_registry_get_feature_list_cookie (gst_registry_get ());
	factories = gst_auto_video_convert_create_factory_list (autovideoconvert);
	} else {
	/* a factories list exist but is it up to date? */
	if (factories_cookie !=
	gst_registry_get_feature_list_cookie (gst_registry_get ())) {
	/* we need to update the factories list */
	/* first free the old one */
	gst_plugin_feature_list_free (factories);
	/* then create an updated one */
	factories_cookie =
	gst_registry_get_feature_list_cookie (gst_registry_get ());
	factories = gst_auto_video_convert_create_factory_list (autovideoconvert);
	}
	}

	g_mutex_unlock (&factories_mutex);
	}

	G_DEFINE_TYPE (GstAutoVideoConvert, gst_auto_video_convert, GST_TYPE_BIN);

	static void
	gst_auto_video_convert_class_init (GstAutoVideoConvertClass * klass)
	{
	GstElementClass gstelement_class = (GstElementClass ) klass;

	GST_DEBUG_CATEGORY_INIT (autovideoconvert_debug, "autovideoconvert", 0,
	"Auto color space converter");

	gst_element_class_add_static_pad_template (gstelement_class, &srctemplate);
	gst_element_class_add_static_pad_template (gstelement_class, &sinktemplate);

	gst_element_class_set_static_metadata (gstelement_class,
	"Select color space convertor based on caps", "Generic/Bin",
	"Selects the right color space convertor based on the caps",
	"Benjamin Gaignard <benjamin.gaignard@stericsson.com>");

	gstelement_class->change_state =
	GST_DEBUG_FUNCPTR (gst_auto_video_convert_change_state);

	}

	static gboolean
	gst_auto_video_convert_add_autoconvert (GstAutoVideoConvert * autovideoconvert)
	{
	GstPad *pad;

	if (autovideoconvert->autoconvert)
	return TRUE;

	autovideoconvert->autoconvert =
	gst_element_factory_make ("autoconvert", "autoconvertchild");
	if (!autovideoconvert->autoconvert) {
	GST_ERROR_OBJECT (autovideoconvert,
	"Could not create autoconvert instance");
	return FALSE;
	}

	/* first add autoconvert in bin */
	gst_bin_add (GST_BIN (autovideoconvert),
	gst_object_ref (autovideoconvert->autoconvert));

	/* get sinkpad and link it to ghost sink pad */
	pad = gst_element_get_static_pad (autovideoconvert->autoconvert, "sink");
	gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (autovideoconvert->sinkpad),
	pad);
	gst_object_unref (pad);

	/* get srcpad and link it to ghost src pad */
	pad = gst_element_get_static_pad (autovideoconvert->autoconvert, "src");
	gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (autovideoconvert->srcpad), pad);
	gst_object_unref (pad);

	return TRUE;
	}

	static void
	gst_auto_video_convert_remove_autoconvert (GstAutoVideoConvert *
	autovideoconvert)
	{
	if (!autovideoconvert->autoconvert)
	return;

	gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (autovideoconvert->srcpad),
	NULL);
	gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (autovideoconvert->sinkpad),
	NULL);

	gst_bin_remove (GST_BIN (autovideoconvert), autovideoconvert->autoconvert);
	gst_object_unref (autovideoconvert->autoconvert);
	autovideoconvert->autoconvert = NULL;
	}

	static void
	gst_auto_video_convert_init (GstAutoVideoConvert * autovideoconvert)
	{
	GstPadTemplate *pad_tmpl;

	/* get sink pad template */
	pad_tmpl = gst_static_pad_template_get (&sinktemplate);
	autovideoconvert->sinkpad =
	gst_ghost_pad_new_no_target_from_template ("sink", pad_tmpl);
	/* add sink ghost pad */
	gst_element_add_pad (GST_ELEMENT (autovideoconvert),
	autovideoconvert->sinkpad);
	gst_object_unref (pad_tmpl);

	/* get src pad template */
	pad_tmpl = gst_static_pad_template_get (&srctemplate);
	autovideoconvert->srcpad =
	gst_ghost_pad_new_no_target_from_template ("src", pad_tmpl);
	/* add src ghost pad */
	gst_element_add_pad (GST_ELEMENT (autovideoconvert),
	autovideoconvert->srcpad);
	gst_object_unref (pad_tmpl);

	return;
	}

	static GstStateChangeReturn
	gst_auto_video_convert_change_state (GstElement * element,
	GstStateChange transition)
	{
	GstAutoVideoConvert *autovideoconvert = GST_AUTO_VIDEO_CONVERT (element);
	GstStateChangeReturn ret;

	switch (transition) {
	case GST_STATE_CHANGE_NULL_TO_READY:
	{
	/* create and add autoconvert in bin */
	if (!gst_auto_video_convert_add_autoconvert (autovideoconvert)) {
	ret = GST_STATE_CHANGE_FAILURE;
	return ret;
	}
	/* get an updated list of factories */
	gst_auto_video_convert_update_factory_list (autovideoconvert);
	GST_DEBUG_OBJECT (autovideoconvert, "set factories list");
	/* give factory list to autoconvert */
	g_object_set (GST_ELEMENT (autovideoconvert->autoconvert), "factories",
	factories, NULL);
	break;
	}
	default:
	break;
	}

	ret = GST_ELEMENT_CLASS (gst_auto_video_convert_parent_class)->change_state
	(element, transition);
	if (ret == GST_STATE_CHANGE_FAILURE)
	return ret;

	switch (transition) {
	case GST_STATE_CHANGE_READY_TO_NULL:
	{
	gst_auto_video_convert_remove_autoconvert (autovideoconvert);
	break;
	}
	default:
	break;
	}

	return ret;
	}