/* GStreamer * * Copyright (C) 2015 Raspberry Pi Foundation * Author: Thibault Saunier * * gstvalidatessim.c: GstValidateActionTypes to use with ssim applications * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 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 * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the * Free Software Foundation, Inc., 59 Temple Place - Suite 330, * Boston, MA 02111-1307, USA. */ /** * SECTION:validate-ssim * @short_description: GstValidate plugin to detect frame corruptions * * GstValidate plugin to run the ssim algorithm on the buffers flowing in the * pipeline to find regressions and detect frame corruptions. * It allows you to generate image files from the buffers flowing in the pipeline * (either as raw in the many formats supported by GStreamer or as png) and then * check them against pre generated, reference images. * * The ssim algorithm will set a value of 1.0 when images are perfectly identical, * and -1.0 if they have nothing in common. By default we consider images as similar * if they have at least a ssim value of 0.95 but you can override it defining the value * under which the test will be considered as failed. * * Errors are reported on the GstValidate reporting system. You can also ask * the plugin to generate grey scale output images. Those will be named in a way * that should lets you precisely see where and how the test failed. * * # Configuration * * The configuration of the plugin is done through a validate configuration file, * specified with the %GST_VALIDATE_CONFIG environment variable. Each line starting * with 'ssim,' will configure the ssim plugin. In practice each configuration statement * will lead to the creation of a #GstValidateOverride object which will then dump * image files and if wanted compare those with a set of reference images. * * The following parameters can be passed in the configuration file: * - element-classification: The target element classification as define in * gst_element_class_set_metadata * - output-dir: The directory in which the image files will be saved * - min-avg-priority: (default 0.95): The minimum average similarity * under which we consider the test as failing * - min-lowest-priority: (default 1): The minimum 'lowest' similarity * under which we consider the test as failing * - reference-images-dir: Define the directory in which the files to be * compared can be found * - result-output-dir: The folder in which to store resulting grey scale * images when the test failed. In that folder you will find images * with the structural difference between the expected result and the actual * result. * - output-video-format: The format in which you want the images to be saved * - reference-video-format: The format in which the reference images are stored * - check-recurrence: The recurrence in seconds (as float) the frames should * be dumped and checked.By default it is GST_CLOCK_TIME_NONE, meaning each * and every frame is checked. Not that in any case, after a discontinuity * in the stream (after a seek or a change in the video format for example) * a check is done. And if recurrence == 0, images will be checked only after * such discontinuity * - is-config: Property letting the plugin know that the config line is exclusively * used to configure the following configuration expressions. In practice this * means that it will change the default values for the other configuration * expressions. * * # Example # * * Let's take a special configuration where we want to compare frames that are * outputted by a video decoder with the ones after a agingtv element we would * call my_agingtv. We force to check one frame every 5.0 seconds only (with * check-recurrence=5.0) so the test is fast. * * The configuration file: * |[ * core, action=set-property, target-element-klass=Sink, property-name=sync, property-value=false * * ssim, is-config=true, output-video-format="I420", reference-video-format="I420" * ssim, element-classification="Video/Decoder", output-dir=/tmp/test/before-agingtv/ * ssim, element-name=my_agingtv, output-dir=/tmp/test/after-agingtv/, \ * reference-images-dir=/tmp/test/before-agingtv/, \ * result-output-dir=/tmp/test/failures, check-recurrence=5.0 * ]| * * Save that content in a file called check_agingtv_ssim.config * * ## Launch the pipeline * |[ * GST_VALIDATE_CONFIG=check_agingtv_ssim.config gst-validate-1.0-debug uridecodebin uri=file://a/file ! videoconvert ! agingtv name=my_agingtv ! videoconvert ! autovideosink * ]| */ #define _GNU_SOURCE #ifdef HAVE_CONFIG_H #include "config.h" #endif #include #include #include #include #include "../../gst-libs/gst/video/gstvalidatessim.h" #include "../../gst/validate/gst-validate-report.h" #include "../../gst/validate/gst-validate-pad-monitor.h" #include "../../gst/validate/gst-validate-reporter.h" #include "../../gst/validate/validate.h" #include "../../gst/validate/gst-validate-scenario.h" #include "../../gst/validate/gst-validate-utils.h" #define SSIM_WRONG_FORMAT g_quark_from_static_string ("validatessim::wrong-format") #define SSIM_CONVERSION_ERROR g_quark_from_static_string ("validatessim::conversion-error") #define SSIM_SAVING_ERROR g_quark_from_static_string ("validatessim::saving-error") #define MONITOR_DATA g_quark_from_static_string ("validate-ssim-monitor-data") typedef struct _ValidateSsimOverridePriv ValidateSsimOverridePriv; typedef struct { GstValidateOverride parent; ValidateSsimOverridePriv *priv; } ValidateSsimOverride; typedef struct { GstValidateOverrideClass parent; } ValidateSsimOverrideClass; typedef struct { gchar *path; GstClockTime position; guint width, height; } Frame; static void free_frame (Frame * frame) { g_free (frame->path); } static GType validate_ssim_override_get_type (void); #define VALIDATE_SSIM_OVERRIDE_TYPE (validate_ssim_override_get_type ()) #define VALIDATE_SSIM_OVERRIDE(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), VALIDATE_SSIM_OVERRIDE_TYPE, ValidateSsimOverride)) #define VALIDATE_SSIM_OVERRIDE_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), VALIDATE_SSIM_OVERRIDE_TYPE, ValidateSsimOverrideClass)) #define IS_VALIDATE_SSIM_OVERRIDE(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), VALIDATE_SSIM_OVERRIDE_TYPE)) #define IS_VALIDATE_SSIM_OVERRIDE_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), VALIDATE_SSIM_OVERRIDE_TYPE)) #define VALIDATE_SSIM_OVERRIDE_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), VALIDATE_SSIM_OVERRIDE_TYPE, ValidateSsimOverrideClass)) /* *INDENT-OFF* */ G_DEFINE_TYPE (ValidateSsimOverride, validate_ssim_override, GST_TYPE_VALIDATE_OVERRIDE) /* *INDENT-ON* */ struct _ValidateSsimOverridePriv { gchar *outdir; gchar *result_outdir; GstStructure *config; gboolean is_attached; GstVideoConverter *converter; GstCaps *last_caps; GstVideoInfo in_info; GstVideoInfo out_info; GArray *frames; GstClockTime recurrence; GstClockTime last_dump_position; /* Always used in the streaming thread */ gboolean needs_reconfigure; GstVideoFormat save_format; const gchar *ext; GstVideoFormat ref_format; const gchar *ref_ext; }; static void runner_stopping (GstValidateRunner * runner, ValidateSsimOverride * self) { GstValidateSsim *ssim; guint i, nfiles; gfloat mssim = 0, lowest = 1, highest = -1, total_avg = 0; gint npassed = 0, nfailures = 0; gdouble min_avg_similarity = 0.95, min_lowest_similarity = -1.0; const gchar *compared_files_dir = gst_structure_get_string (self->priv->config, "reference-images-dir"); if (!compared_files_dir) { return; } gst_validate_printf (self, "Running frame comparison between images from %s and %s" "%s%s.\n", compared_files_dir, self->priv->outdir, self->priv->result_outdir ? ". Issues can be visialized in " : " (set 'result-output-dir' in the config file to visualize the result)", self->priv->result_outdir ? self->priv->result_outdir : ""); gst_structure_get_double (self->priv->config, "min-avg-priority", &min_avg_similarity); gst_structure_get_double (self->priv->config, "min-lowest-priority", &min_lowest_similarity); ssim = gst_validate_ssim_new (runner, min_avg_similarity, min_lowest_similarity); nfiles = self->priv->frames->len; for (i = 0; i < nfiles; i++) { Frame *frame = &g_array_index (self->priv->frames, Frame, i); gchar *refname, *ref_path, *bname = g_path_get_basename (frame->path); if (self->priv->ref_format == GST_VIDEO_FORMAT_ENCODED) refname = g_strdup_printf ("*.%s", self->priv->ref_ext); else refname = g_strdup_printf ("*.%dx%d.%s", frame->width, frame->height, self->priv->ref_ext); ref_path = g_build_path (G_DIR_SEPARATOR_S, compared_files_dir, refname, NULL); if (!gst_validate_ssim_compare_image_files (ssim, ref_path, frame->path, &mssim, &lowest, &highest, self->priv->result_outdir)) nfailures++; else npassed++; total_avg += mssim; gst_validate_printf (NULL, "\r", GST_TIME_ARGS (frame->position), i + 1, nfiles, mssim, lowest, npassed, nfailures); g_free (bname); } gst_validate_printf (NULL, "\nAverage similarity: %f\n", total_avg / nfiles); } static void _runner_set (GObject * object, GParamSpec * pspec, gpointer user_data) { ValidateSsimOverride *self = VALIDATE_SSIM_OVERRIDE (object); self->priv->is_attached = TRUE; g_signal_connect (gst_validate_reporter_get_runner (GST_VALIDATE_REPORTER (self)), "stopping", G_CALLBACK (runner_stopping), self); } static ValidateSsimOverride * validate_ssim_override_new (GstStructure * config) { const gchar *format; ValidateSsimOverride *self = g_object_new (VALIDATE_SSIM_OVERRIDE_TYPE, NULL); self->priv->outdir = g_strdup (gst_structure_get_string (config, "output-dir")); if (self->priv->outdir == NULL) { gchar *template = g_build_filename (g_get_tmp_dir (), "validatessim-XXXXXX", NULL); self->priv->outdir = g_mkdtemp (template); } if (!g_file_test (self->priv->outdir, G_FILE_TEST_IS_DIR)) { if (g_mkdir_with_parents (self->priv->outdir, 0755) != 0) { GST_ERROR ("Could not create directory %s", self->priv->outdir); g_object_unref (self); return NULL; } } gst_validate_printf (self, "Using %s as output directory\n", self->priv->outdir); self->priv->config = gst_structure_copy (config); self->priv->result_outdir = g_strdup (gst_structure_get_string (config, "result-output-dir")); format = gst_structure_get_string (config, "output-video-format"); if (!format) { self->priv->save_format = GST_VIDEO_FORMAT_ENCODED; self->priv->ext = "png"; } else { self->priv->save_format = gst_video_format_from_string (format); self->priv->ext = format; } if (self->priv->save_format == GST_VIDEO_FORMAT_UNKNOWN) { GST_ERROR ("Uknown video format: %s", format); gst_object_unref (self); return NULL; } format = gst_structure_get_string (config, "reference-video-format"); if (!format) { self->priv->ref_ext = "png"; self->priv->ref_format = GST_VIDEO_FORMAT_ENCODED; } else { self->priv->ref_format = gst_video_format_from_string (format); if (self->priv->ref_format == GST_VIDEO_FORMAT_UNKNOWN) { GST_ERROR ("Uknown video format: %s", format); gst_object_unref (self); return NULL; } self->priv->ref_ext = format; } gst_validate_utils_get_clocktime (config, "check-recurrence", &self->priv->recurrence); g_signal_connect (self, "notify::validate-runner", G_CALLBACK (_runner_set), NULL); return self; } static gboolean _can_attach (GstValidateOverride * override, GstValidateMonitor * monitor) { guint i; GstPad *pad; GstCaps *template_caps; GstElement *element; GstStructure *structure; if (VALIDATE_SSIM_OVERRIDE (override)->priv->is_attached) { GST_ERROR_OBJECT (override, "Already attached"); return FALSE; } if (!GST_IS_VALIDATE_PAD_MONITOR (monitor)) { return FALSE; } pad = GST_VALIDATE_PAD_MONITOR_GET_PAD (monitor); element = gst_validate_monitor_get_element (monitor); if ((gst_validate_element_has_klass (element, "Converter") || gst_validate_element_has_klass (element, "Filter")) && GST_PAD_IS_SINK (pad)) { GST_INFO_OBJECT (override, "Not attaching on filter sinkpads"); return FALSE; } template_caps = GST_PAD_TEMPLATE_CAPS (GST_PAD_PAD_TEMPLATE (pad)); for (i = 0; i < gst_caps_get_size (template_caps); i++) { structure = gst_caps_get_structure (template_caps, i); if (gst_structure_has_name (structure, "video/x-raw")) { GST_INFO_OBJECT (override, "Wrapping %" GST_PTR_FORMAT, pad); gst_validate_reporter_set_name (GST_VALIDATE_REPORTER (override), g_strdup_printf ("ssim-override-%s", gst_validate_reporter_get_name (GST_VALIDATE_REPORTER (monitor)))); return TRUE; } } return FALSE; } static void _finalize (GObject * object) { ValidateSsimOverridePriv *priv = VALIDATE_SSIM_OVERRIDE (object)->priv; if (priv->converter) gst_video_converter_free (priv->converter); if (priv->last_caps) gst_caps_unref (priv->last_caps); g_free (priv->outdir); g_free (priv->result_outdir); g_array_unref (priv->frames); if (priv->config) gst_structure_free (priv->config); } static void validate_ssim_override_class_init (ValidateSsimOverrideClass * klass) { GObjectClass *gobject_class = G_OBJECT_CLASS (klass); gobject_class->finalize = _finalize; if (!gst_validate_is_initialized ()) return; GST_VALIDATE_OVERRIDE_CLASS (klass)->can_attach = _can_attach; gst_validate_issue_register (gst_validate_issue_new (SSIM_WRONG_FORMAT, "The ValidateSSim plugin can not work with a video format", "The GstValidate ssim plugin was not able to work" " with a video format that flowed in the pipeline." " Make sure you properly configured the plugin", GST_VALIDATE_REPORT_LEVEL_CRITICAL)); gst_validate_issue_register (gst_validate_issue_new (SSIM_CONVERSION_ERROR, "The ValidateSSim plugin could not convert a frame in the needed format", "The GstValidate ssim plugin needs to convert the frame in a colorspace" " it can handle, but it was not possible.", GST_VALIDATE_REPORT_LEVEL_CRITICAL)); gst_validate_issue_register (gst_validate_issue_new (SSIM_SAVING_ERROR, "The ValidateSSim plugin could not save PNG file", "The ValidateSSim plugin could not save PNG file", GST_VALIDATE_REPORT_LEVEL_CRITICAL)); g_type_class_add_private (klass, sizeof (ValidateSsimOverridePriv)); } static void validate_ssim_override_init (ValidateSsimOverride * self) { self->priv = G_TYPE_INSTANCE_GET_PRIVATE (self, VALIDATE_SSIM_OVERRIDE_TYPE, ValidateSsimOverridePriv); self->priv->needs_reconfigure = TRUE; self->priv->frames = g_array_new (TRUE, TRUE, sizeof (Frame)); g_array_set_clear_func (self->priv->frames, (GDestroyNotify) free_frame); } static gboolean _set_videoconvert (ValidateSsimOverride * o, GstValidatePadMonitor * pad_monitor) { GstCaps *caps; GstVideoFormat format; ValidateSsimOverridePriv *priv = o->priv; GstPad *pad = GST_VALIDATE_PAD_MONITOR_GET_PAD (pad_monitor); caps = gst_pad_get_current_caps (pad); gst_caps_replace (&priv->last_caps, caps); gst_video_info_init (&priv->in_info); gst_video_info_init (&priv->out_info); if (priv->converter) { gst_video_converter_free (priv->converter); priv->converter = NULL; } if (!gst_video_info_from_caps (&priv->in_info, priv->last_caps)) { GST_VALIDATE_REPORT (o, SSIM_WRONG_FORMAT, "The format %" GST_PTR_FORMAT " is not supported" " by the plugin", pad_monitor->last_caps); return FALSE; } if (GST_VIDEO_INFO_HAS_ALPHA (&priv->in_info)) format = GST_VIDEO_FORMAT_BGRA; else format = GST_VIDEO_FORMAT_BGRx; if (priv->in_info.finfo->format == format) { GST_INFO_OBJECT (o, "No conversion needed"); return TRUE; } if (priv->save_format != GST_VIDEO_FORMAT_ENCODED) format = priv->save_format; gst_video_info_set_format (&priv->out_info, format, priv->in_info.width, priv->in_info.height); priv->out_info.fps_d = priv->in_info.fps_d; priv->out_info.fps_n = priv->in_info.fps_n; priv->converter = gst_video_converter_new (&priv->in_info, &priv->out_info, NULL); return TRUE; } static gboolean has_frame (ValidateSsimOverride * self, gchar * name) { guint i; GArray *frames = self->priv->frames; for (i = 0; i < frames->len; ++i) { if (g_strcmp0 (g_array_index (frames, Frame, i).path, name) == 0) return TRUE; } return FALSE; } static gchar * _get_filename (ValidateSsimOverride * self, GstValidatePadMonitor * monitor, GstClockTime position) { gint i = 0; gchar *outname = NULL, *s; if (self->priv->save_format == GST_VIDEO_FORMAT_ENCODED) s = g_strdup_printf ("%" GST_TIME_FORMAT ".%s", GST_TIME_ARGS (position), self->priv->ext); else s = g_strdup_printf ("%" GST_TIME_FORMAT ".%dx%d.%s", GST_TIME_ARGS (position), self->priv->out_info.width, self->priv->out_info.height, self->priv->ext); outname = g_build_path (G_DIR_SEPARATOR_S, self->priv->outdir, s, NULL); g_free (s); while (has_frame (self, outname)) { g_free (outname); if (self->priv->save_format == GST_VIDEO_FORMAT_ENCODED) s = g_strdup_printf ("%" GST_TIME_FORMAT "-%d.%s", GST_TIME_ARGS (position), i++, self->priv->ext); else s = g_strdup_printf ("%" GST_TIME_FORMAT "-%d.%dx%d.%s", GST_TIME_ARGS (position), i++, self->priv->out_info.width, self->priv->out_info.height, self->priv->ext); outname = g_build_path (G_DIR_SEPARATOR_S, self->priv->outdir, s, NULL); g_free (s); } return outname; } static gboolean _should_dump_buffer (ValidateSsimOverride * self, GstValidatePadMonitor * pad_monitor, GstClockTime position) { ValidateSsimOverridePriv *priv = self->priv; if (!GST_CLOCK_TIME_IS_VALID (priv->recurrence)) return TRUE; if (priv->needs_reconfigure) return TRUE; /* recurence 0 means, dump exclusively on reconfiguration */ if (priv->recurrence == 0) return FALSE; if (ABS (position - priv->last_dump_position) >= priv->recurrence) return TRUE; return FALSE; } static gboolean _save_frame (ValidateSsimOverride * self, GstVideoFrame * frame, const gchar * outname) { gboolean res = TRUE; cairo_status_t status; cairo_surface_t *surface; GError *error = NULL; if (self->priv->save_format == GST_VIDEO_FORMAT_ENCODED) { surface = cairo_image_surface_create_for_data (GST_VIDEO_FRAME_PLANE_DATA (frame, 0), CAIRO_FORMAT_RGB24, GST_VIDEO_FRAME_WIDTH (frame), GST_VIDEO_FRAME_HEIGHT (frame), GST_VIDEO_FRAME_PLANE_STRIDE (frame, 0)); if ((status = cairo_surface_write_to_png (surface, outname)) != CAIRO_STATUS_SUCCESS) { GST_VALIDATE_REPORT (self, SSIM_SAVING_ERROR, "Could not save %s" " cairo status is %s", outname, cairo_status_to_string (status)); res = FALSE; } cairo_surface_destroy (surface); return res; } if (!g_file_set_contents (outname, GST_VIDEO_FRAME_PLANE_DATA (frame, 0), GST_VIDEO_FRAME_SIZE (frame), &error)) { GST_VALIDATE_REPORT (self, SSIM_SAVING_ERROR, "Could not save %s error: %s", outname, error->message); res = FALSE; } return res; } static void _handle_buffer (GstValidateOverride * override, GstValidatePadMonitor * pad_monitor, GstBuffer * buffer) { gchar *outname = NULL; GstVideoFrame frame; Frame iframe; ValidateSsimOverride *o = VALIDATE_SSIM_OVERRIDE (override); ValidateSsimOverridePriv *priv = o->priv; GstClockTime running_time, position; running_time = gst_segment_to_running_time (&pad_monitor->segment, GST_FORMAT_TIME, GST_BUFFER_PTS (buffer)); position = gst_segment_to_position (&pad_monitor->segment, GST_FORMAT_TIME, running_time); if (!_should_dump_buffer (o, pad_monitor, position)) { GST_LOG_OBJECT (override, "Not dumping buffer: %" GST_TIME_FORMAT, GST_TIME_ARGS (position)); return; } if (priv->needs_reconfigure) { priv->needs_reconfigure = !_set_videoconvert (o, pad_monitor); } if (priv->converter) { GstVideoFrame inframe; GstBuffer *outbuf; if (!gst_video_frame_map (&inframe, &priv->in_info, buffer, GST_MAP_READ)) { GST_VALIDATE_REPORT (o, SSIM_CONVERSION_ERROR, "Could not map the videoframe %p", buffer); return; } outbuf = gst_buffer_new_allocate (NULL, priv->out_info.size, NULL); if (!gst_video_frame_map (&frame, &priv->out_info, outbuf, GST_MAP_WRITE)) { GST_VALIDATE_REPORT (o, SSIM_CONVERSION_ERROR, "Could not map the outbuffer %p", outbuf); gst_buffer_unref (outbuf); return; } gst_buffer_unref (outbuf); gst_video_converter_frame (priv->converter, &inframe, &frame); gst_video_frame_unmap (&inframe); } else { if (!gst_video_frame_map (&frame, &priv->in_info, buffer, GST_MAP_WRITE)) { GST_VALIDATE_REPORT (o, SSIM_CONVERSION_ERROR, "Could not map the buffer %p", buffer); return; } } outname = _get_filename (o, pad_monitor, position); if (_save_frame (o, &frame, outname)) { priv->last_dump_position = position; iframe.position = position; iframe.path = outname; iframe.width = priv->in_info.width; iframe.height = priv->in_info.height; g_array_append_val (priv->frames, iframe); } gst_video_frame_unmap (&frame); } static void _handle_event (GstValidateOverride * override, GstValidateMonitor * pad_monitor, GstEvent * event) { ValidateSsimOverride *self = VALIDATE_SSIM_OVERRIDE (override); switch (GST_EVENT_TYPE (event)) { case GST_EVENT_FLUSH_STOP: self->priv->needs_reconfigure = TRUE; break; case GST_EVENT_CAPS: self->priv->needs_reconfigure = TRUE; break; default: break; } } static gboolean _map_confg (GQuark field_id, GValue * value, GstStructure * structure) { if (!gst_structure_id_has_field (structure, field_id)) gst_structure_id_set_value (structure, field_id, value); return TRUE; } static gboolean gst_validate_ssim_init (GstPlugin * plugin) { GList *tmp, *config; GstStructure *config_structure = NULL; if (!gst_validate_is_initialized ()) return FALSE; config = gst_validate_plugin_get_config (plugin); for (tmp = config; tmp; tmp = tmp->next) { gboolean is_config; if (gst_structure_get_boolean (tmp->data, "is-config", &is_config)) { if (is_config) { config_structure = tmp->data; break; } } } for (tmp = config; tmp; tmp = tmp->next) { const gchar *name = gst_structure_get_string (tmp->data, "element-name"); const gchar *target_element_classification = gst_structure_get_string (tmp->data, "element-classification"); if (tmp->data == config_structure) continue; if (config_structure) { gst_structure_map_in_place (config_structure, (GstStructureMapFunc) _map_confg, tmp->data); } if ((name || target_element_classification)) { GstValidateOverride *override = GST_VALIDATE_OVERRIDE (validate_ssim_override_new (tmp->data)); if (override == NULL) { GST_ERROR ("Could not create override with config %" GST_PTR_FORMAT, tmp->data); continue; } override->buffer_probe_handler = (GstValidateOverrideBufferHandler) _handle_buffer; override->buffer_handler = (GstValidateOverrideBufferHandler) _handle_buffer; override->event_handler = (GstValidateOverrideEventHandler) _handle_event; if (target_element_classification) gst_validate_override_register_by_klass (target_element_classification, override); else if (name) gst_validate_override_register_by_name (name, override); else g_assert_not_reached (); } else { GST_ERROR ("Wrong configuration '%" GST_PTR_FORMAT "'element-classification' and output-dir are mandatory fields", tmp->data); g_assert_not_reached (); } } return TRUE; } GST_PLUGIN_DEFINE (GST_VERSION_MAJOR, GST_VERSION_MINOR, ssim, "GstValidate plugin to run the ssim algorithm on raw" " video buffers. It allows you to generate png files" "\n " " and then check them against pre generated, reference images." "\n " " The following parametters can be passed in the configuration file:" "\n " " 'element-classification': The target element classification as define in gst_element_class_set_metadata" "\n " " 'output-dir': The directory in which the image files will be saved'" "\n", gst_validate_ssim_init, VERSION, "LGPL", GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)