+++ /dev/null
-/* GStreamer
- * Copyright (C) <2009> Руслан Ижбулатов <lrn1986 _at_ gmail _dot_ com>
- *
- * 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., 51 Franklin Street, Fifth Floor,
- * Boston, MA 02110-1301 USA
- */
-
-/**
- * SECTION:element-measurecollector
- *
- * This plugin collects measurements from measuring elemtns and calculates
- * total measure for the whole sequence and also outputs measurements to a file
- * <classname>"GstMeasureCollector"</classname>.
- */
-
-#ifdef HAVE_CONFIG_H
-#include "config.h"
-#endif
-
-#include <gst/gst-i18n-plugin.h>
-
-#include "gstvideomeasure_collector.h"
-
-#include <stdio.h>
-#include <string.h>
-#include <math.h>
-
-#include <gst/video/video.h>
-
-/* GstMeasureCollector signals and args */
-
-enum
-{
- PROP_0,
- PROP_FLAGS,
- PROP_FILENAME
-};
-
-GST_DEBUG_CATEGORY_STATIC (measure_collector_debug);
-#define GST_CAT_DEFAULT measure_collector_debug
-
-static GstStaticPadTemplate gst_measure_collector_src_template =
-GST_STATIC_PAD_TEMPLATE ("src",
- GST_PAD_SRC,
- GST_PAD_ALWAYS,
- GST_STATIC_CAPS_ANY);
-
-static GstStaticPadTemplate gst_measure_collector_sink_template =
-GST_STATIC_PAD_TEMPLATE ("sink",
- GST_PAD_SINK,
- GST_PAD_ALWAYS,
- GST_STATIC_CAPS_ANY);
-
-//static GstBaseTransformClass *parent_class = NULL;
-
-static void gst_measure_collector_finalize (GObject * object);
-static gboolean gst_measure_collector_event (GstBaseTransform * base,
- GstEvent * event);
-static void gst_measure_collector_save_csv (GstMeasureCollector * mc);
-
-static void gst_measure_collector_post_message (GstMeasureCollector * mc);
-
-GST_BOILERPLATE (GstMeasureCollector, gst_measure_collector, GstBaseTransform,
- GST_TYPE_BASE_TRANSFORM);
-
-static void
-gst_measure_collector_collect (GstMeasureCollector * mc, GstEvent * gstevent)
-{
- const GstStructure *str;
- const gchar *event, *metric;
- guint64 framenumber = G_MAXUINT64;
- const GValue *framenumber_v;
-
- str = gst_event_get_structure (gstevent);
-
- event = gst_structure_get_string (str, "event");
- metric = gst_structure_get_string (str, "metric");
-
- if (strcmp (event, "frame-measured") == 0 && metric != NULL) {
- GstStructure *cpy;
- cpy = gst_structure_copy (str);
-
- framenumber_v = gst_structure_get_value (str, "offset");
- if (framenumber_v) {
- if (G_VALUE_TYPE (framenumber_v) == G_TYPE_UINT64)
- framenumber = g_value_get_uint64 (framenumber_v);
- else if (G_VALUE_TYPE (framenumber_v) == G_TYPE_INT64)
- framenumber = g_value_get_int64 (framenumber_v);
- }
-
- if (framenumber == G_MAXUINT64)
- framenumber = mc->nextoffset++;
-
- if (mc->measurements->len <= framenumber)
- g_ptr_array_set_size (mc->measurements, framenumber + 1);
- g_ptr_array_index (mc->measurements, framenumber) = cpy;
-
- mc->nextoffset = framenumber + 1;
-
- if (!mc->metric)
- mc->metric = g_strdup (metric);
- }
-}
-
-static void
-gst_measure_collector_post_message (GstMeasureCollector * mc)
-{
- GstMessage *m;
- guint64 i;
-
- g_return_if_fail (mc->metric);
-
- if (strcmp (mc->metric, "SSIM") == 0) {
- gfloat dresult = 0;
- guint64 mlen;
- g_free (mc->result);
- mc->result = g_new0 (GValue, 1);
- g_value_init (mc->result, G_TYPE_FLOAT);
- mlen = mc->measurements->len;
- for (i = 0; i < mc->measurements->len; i++) {
- const GValue *v;
- GstStructure *str =
- (GstStructure *) g_ptr_array_index (mc->measurements, i);
- if (str) {
- v = gst_structure_get_value (str, "mean");
- dresult += g_value_get_float (v);
- } else {
- GST_WARNING_OBJECT (mc,
- "No measurement info for frame %" G_GUINT64_FORMAT, i);
- mlen--;
- }
- }
- g_value_set_float (mc->result, dresult / mlen);
- }
-
- m = gst_message_new_element (GST_OBJECT_CAST (mc),
- gst_structure_new ("GstMeasureCollector",
- "measure-result", G_TYPE_VALUE, mc->result, NULL));
-
- gst_element_post_message (GST_ELEMENT_CAST (mc), m);
-}
-
-static void
-gst_measure_collector_set_property (GObject * object, guint prop_id,
- const GValue * value, GParamSpec * pspec)
-{
- GstMeasureCollector *measurecollector;
-
- measurecollector = GST_MEASURE_COLLECTOR (object);
-
- switch (prop_id) {
- case PROP_FLAGS:
- measurecollector->flags = g_value_get_uint64 (value);
- break;
- case PROP_FILENAME:
- measurecollector->filename = g_value_dup_string (value);
- break;
- default:
- G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
- break;
- }
-}
-
-static void
-gst_measure_collector_get_property (GObject * object, guint prop_id,
- GValue * value, GParamSpec * pspec)
-{
- GstMeasureCollector *measurecollector;
-
- measurecollector = GST_MEASURE_COLLECTOR (object);
-
- switch (prop_id) {
- case PROP_FLAGS:
- g_value_set_uint64 (value, measurecollector->flags);
- break;
- case PROP_FILENAME:
- g_value_set_string (value, measurecollector->filename);
- break;
- default:
- G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
- break;
- }
-}
-
-static gboolean
-gst_measure_collector_event (GstBaseTransform * base, GstEvent * event)
-{
- GstMeasureCollector *mc = GST_MEASURE_COLLECTOR (base);
-
- switch (GST_EVENT_TYPE (event)) {
- case GST_EVENT_CUSTOM_DOWNSTREAM:
- if (gst_event_has_name (event, GST_EVENT_VIDEO_MEASURE))
- gst_measure_collector_collect (mc, event);
- break;
- case GST_EVENT_EOS:
- gst_measure_collector_post_message (mc);
- gst_measure_collector_save_csv (mc);
- break;
- default:
- break;
- }
-
- return parent_class->event (base, event);
-}
-
-static void
-gst_measure_collector_save_csv (GstMeasureCollector * mc)
-{
- gchar *name_local;
- FILE *file;
- guint64 i, j;
- GstStructure *str;
- GValue tmp = { 0 };
- g_value_init (&tmp, G_TYPE_STRING);
-
- if (!(mc->flags & GST_MEASURE_COLLECTOR_WRITE_CSV))
- return;
-
- if (mc->measurements->len <= 0)
- goto empty;
-
- /* open the file */
- if (mc->filename == NULL || mc->filename[0] == '\0')
- goto no_filename;
-
- name_local = g_filename_from_utf8 ((const gchar *) mc->filename,
- -1, NULL, NULL, NULL);
-
- /* open the file */
- if (name_local == NULL || name_local[0] == '\0')
- goto not_good_filename;
-
-
- /* FIXME, can we use g_fopen here? some people say that the FILE object is
- * local to the .so that performed the fopen call, which would not be us when
- * we use g_fopen. */
- file = fopen (name_local, "wb");
-
- g_free (name_local);
-
- if (file == NULL)
- goto open_failed;
-
- str = (GstStructure *) g_ptr_array_index (mc->measurements, 0);
-
- for (j = 0; j < gst_structure_n_fields (str); j++) {
- const gchar *fieldname;
- fieldname = gst_structure_nth_field_name (str, j);
- if (G_LIKELY (j > 0))
- fprintf (file, ";");
- fprintf (file, "%s", fieldname);
- }
-
- for (i = 0; i < mc->measurements->len; i++) {
- fprintf (file, "\n");
- str = (GstStructure *) g_ptr_array_index (mc->measurements, i);
- if (str != NULL) {
- for (j = 0; j < gst_structure_n_fields (str); j++) {
- const gchar *fieldname;
- fieldname = gst_structure_nth_field_name (str, j);
- if (G_LIKELY (j > 0))
- fprintf (file, ";");
- if (G_LIKELY (g_value_transform (gst_structure_get_value (str,
- fieldname), &tmp)))
- fprintf (file, "%s", g_value_get_string (&tmp));
- else
- fprintf (file, "<untranslatable>");
- }
- }
- }
-
- fclose (file);
-
- /* ERRORS */
-empty:
- {
- return;
- }
-no_filename:
- {
- GST_ELEMENT_ERROR (mc, RESOURCE, NOT_FOUND,
- (_("No file name specified for writing.")), (NULL));
- return;
- }
-not_good_filename:
- {
- GST_ELEMENT_ERROR (mc, RESOURCE, NOT_FOUND,
- (_("Given file name \"%s\" can't be converted to local file name \
-encoding."), mc->filename), (NULL));
- return;
- }
-open_failed:
- {
- GST_ELEMENT_ERROR (mc, RESOURCE, OPEN_WRITE,
- (_("Could not open file \"%s\" for writing."), mc->filename),
- GST_ERROR_SYSTEM);
- return;
- }
-}
-
-static void
-gst_measure_collector_base_init (gpointer g_class)
-{
- GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
-
- gst_element_class_set_static_metadata (element_class,
- "Video measure collector", "Filter/Effect/Video",
- "Collect measurements from a measuring element",
- "Руслан Ижбулатов <lrn _at_ gmail _dot_ com>");
-
- gst_element_class_add_static_pad_template (element_class,
- &gst_measure_collector_sink_template);
- gst_element_class_add_static_pad_template (element_class,
- &gst_measure_collector_src_template);
-}
-
-static void
-gst_measure_collector_class_init (GstMeasureCollectorClass * klass)
-{
- GObjectClass *gobject_class;
- GstBaseTransformClass *trans_class;
-
- gobject_class = G_OBJECT_CLASS (klass);
- trans_class = GST_BASE_TRANSFORM_CLASS (klass);
-
- GST_DEBUG_CATEGORY_INIT (GST_CAT_DEFAULT, "measurecollect", 0,
- "measurement collector");
-
- gobject_class->set_property = gst_measure_collector_set_property;
- gobject_class->get_property = gst_measure_collector_get_property;
- gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_measure_collector_finalize);
-
- g_object_class_install_property (gobject_class, PROP_FLAGS,
- g_param_spec_uint64 ("flags", "Flags",
- "Flags that control the operation of the element",
- 0, G_MAXUINT64, 0,
- G_PARAM_READWRITE | G_PARAM_CONSTRUCT | G_PARAM_STATIC_STRINGS));
-
- g_object_class_install_property (gobject_class, PROP_FILENAME,
- g_param_spec_string ("filename", "Output file name",
- "A name of a file into which element will write the measurement"
- " information", "",
- G_PARAM_READWRITE | G_PARAM_CONSTRUCT | G_PARAM_STATIC_STRINGS));
-
- trans_class->event = GST_DEBUG_FUNCPTR (gst_measure_collector_event);
-
- trans_class->passthrough_on_same_caps = TRUE;
-
-}
-
-static void
-gst_measure_collector_init (GstMeasureCollector * instance,
- GstMeasureCollectorClass * g_class)
-{
- GstMeasureCollector *measurecollector;
-
- measurecollector = GST_MEASURE_COLLECTOR (instance);
-
- GST_DEBUG_OBJECT (measurecollector, "gst_measure_collector_init");
-
- gst_base_transform_set_qos_enabled (GST_BASE_TRANSFORM (measurecollector),
- FALSE);
-
- measurecollector->measurements = g_ptr_array_new ();
- measurecollector->metric = NULL;
- measurecollector->inited = TRUE;
- measurecollector->filename = NULL;
- measurecollector->flags = 0;
- measurecollector->nextoffset = 0;
- measurecollector->result = NULL;
-}
-
-static void
-gst_measure_collector_finalize (GObject * object)
-{
- gint i;
- GstMeasureCollector *mc = GST_MEASURE_COLLECTOR (object);
-
- for (i = 0; i < mc->measurements->len; i++) {
- if (g_ptr_array_index (mc->measurements, i) != NULL)
- gst_structure_free ((GstStructure *) g_ptr_array_index (mc->measurements,
- i));
- }
-
- g_ptr_array_free (mc->measurements, TRUE);
- mc->measurements = NULL;
-
- g_free (mc->result);
- mc->result = NULL;
-
- g_free (mc->metric);
- mc->metric = NULL;
-
- g_free (mc->filename);
- mc->filename = NULL;
-
- G_OBJECT_CLASS (parent_class)->finalize (object);
-}
+++ /dev/null
-/* GStreamer
- * Copyright (C) <2009> Руслан Ижбулатов <lrn1986 _at_ gmail _dot_ com>
- *
- * 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., 51 Franklin Street, Fifth Floor,
- * Boston, MA 02110-1301 USA
- */
-
-/**
- * SECTION:element-ssim
- *
- * The ssim calculates SSIM (Structural SIMilarity) index for two or more
- * streams, for each frame.
- * First stream is the original, other streams are modified (compressed) ones.
- * ssim will calculate SSIM index of each frame of each modified stream, using
- * original stream as a reference.
- *
- * The ssim accepts only YUV planar top-first data and calculates only Y-SSIM.
- * All streams must have the same width, height and colorspace.
- * Output streams are greyscale video streams, where bright pixels indicate
- * high SSIM values, dark pixels - low SSIM values.
- * The ssim also calculates mean SSIM index for each frame and emits is as a
- * message.
- * ssim is intended to be used with videomeasure_collector element to catch the
- * events (such as mean SSIM index values) and save them into a file.
- *
- * <refsect2>
- * <title>Example launch line</title>
- * |[
- * gst-launch ssim name=ssim ssim.src0 ! videoconvert ! glimagesink filesrc
- * location=orig.avi ! decodebin ! ssim.original filesrc location=compr.avi !
- * decodebin ! ssim.modified0
- * ]| This pipeline produces a video stream that consists of SSIM frames.
- * </refsect2>
- */
-/* Element-Checklist-Version: 5 */
-
-#ifdef HAVE_CONFIG_H
-#include "config.h"
-#endif
-
-#include "gstvideomeasure.h"
-#include "gstvideomeasure_ssim.h"
-#include <gst/audio/audio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <math.h>
-
-#define GST_CAT_DEFAULT gst_ssim_debug
-GST_DEBUG_CATEGORY_STATIC (GST_CAT_DEFAULT);
-
-/* elementfactory information */
-
-#define SINK_CAPS \
- "video/x-raw-yuv, " \
- "format = (fourcc) { I420, YV12, Y41B, Y42B } "
-
-
-#define SRC_CAPS \
- "video/x-raw-gray, " \
- "width = (int) [ 1, MAX ], " \
- "height = (int) [ 1, MAX ], " \
- "framerate = (fraction) [ 0/1, MAX ], " \
- "bpp = (int) 8, " \
- "depth = (int) 8 "
-
-static GstStaticPadTemplate gst_ssim_src_template =
-GST_STATIC_PAD_TEMPLATE ("src_%u",
- GST_PAD_SRC,
- GST_PAD_SOMETIMES,
- GST_STATIC_CAPS (SRC_CAPS)
- );
-
-static GstStaticPadTemplate gst_ssim_sink_original_template =
-GST_STATIC_PAD_TEMPLATE ("original",
- GST_PAD_SINK,
- GST_PAD_REQUEST,
- GST_STATIC_CAPS (SINK_CAPS)
- );
-
-static GstStaticPadTemplate gst_ssim_sink_modified_template =
-GST_STATIC_PAD_TEMPLATE ("modified_%u",
- GST_PAD_SINK,
- GST_PAD_REQUEST,
- GST_STATIC_CAPS (SINK_CAPS)
- );
-
-static void gst_ssim_class_init (GstSSimClass * klass);
-static void gst_ssim_init (GstSSim * ssim);
-static void gst_ssim_finalize (GObject * object);
-
-static gboolean gst_ssim_setcaps (GstPad * pad, GstCaps * caps);
-static gboolean gst_ssim_query (GstPad * pad, GstQuery * query);
-static gboolean gst_ssim_src_event (GstPad * pad, GstEvent * event);
-static gboolean gst_ssim_sink_event (GstPad * pad, GstEvent * event);
-
-static GstPad *gst_ssim_request_new_pad (GstElement * element,
- GstPadTemplate * temp, const gchar * unused);
-static void gst_ssim_release_pad (GstElement * element, GstPad * pad);
-
-static GstStateChangeReturn gst_ssim_change_state (GstElement * element,
- GstStateChange transition);
-
-static GstFlowReturn gst_ssim_collected (GstCollectPads * pads,
- gpointer user_data);
-
-static GstElementClass *parent_class = NULL;
-
-GType
-gst_ssim_get_type (void)
-{
- static GType ssim_type = 0;
-
- if (G_UNLIKELY (ssim_type == 0)) {
- static const GTypeInfo ssim_info = {
- sizeof (GstSSimClass), NULL, NULL,
- (GClassInitFunc) gst_ssim_class_init, NULL, NULL,
- sizeof (GstSSim), 0,
- (GInstanceInitFunc) gst_ssim_init,
- };
-
- ssim_type = g_type_register_static (GST_TYPE_ELEMENT, "GstSSim",
- &ssim_info, 0);
- GST_DEBUG_CATEGORY_INIT (GST_CAT_DEFAULT, "ssim", 0, "SSIM calculator");
- }
- return ssim_type;
-}
-
-static void
-gst_ssim_post_message (GstSSim * ssim, GstBuffer * buffer, gfloat mssim,
- gfloat lowest, gfloat highest)
-{
- GstMessage *m;
- guint64 offset;
-
- offset = GST_BUFFER_OFFSET (buffer);
-
- m = gst_message_new_element (GST_OBJECT_CAST (ssim),
- gst_structure_new ("SSIM",
- "offset", G_TYPE_UINT64, offset,
- "timestamp", GST_TYPE_CLOCK_TIME, GST_BUFFER_TIMESTAMP (buffer),
- "mean", G_TYPE_FLOAT, mssim,
- "lowest", G_TYPE_FLOAT, lowest,
- "highest", G_TYPE_FLOAT, highest, NULL));
-
- GST_DEBUG_OBJECT (GST_OBJECT (ssim), "Frame %" G_GINT64_FORMAT
- " @ %" GST_TIME_FORMAT " mean SSIM is %f, l-h is %f-%f", offset,
- GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buffer)), mssim, lowest, highest);
-
- gst_element_post_message (GST_ELEMENT_CAST (ssim), m);
-}
-
-static GstCaps *
-gst_ssim_src_getcaps (GstPad * pad)
-{
- GstCaps *result;
- gchar *capstr;
-
- result = gst_caps_copy (gst_pad_get_pad_template_caps (pad));
- capstr = gst_caps_to_string (result);
- GST_DEBUG ("getsrccaps - return static caps: %s", capstr);
- g_free (capstr);
- return result;
-}
-
-static GstCaps *
-gst_ssim_sink_getcaps (GstPad * pad)
-{
- GstCaps *result = NULL;
- GstSSim *ssim;
- gchar *capstr;
-
- ssim = GST_SSIM (GST_PAD_PARENT (pad));
-
- GST_OBJECT_LOCK (ssim);
-
- result = gst_pad_get_fixed_caps_func (pad);
- capstr = gst_caps_to_string (result);
- GST_DEBUG ("getsinkcaps - return caps: %s", capstr);
- g_free (capstr);
-
- GST_OBJECT_UNLOCK (ssim);
-
- return result;
-}
-
-static void
-calculate_mu (GstSSim * ssim, gfloat * outmu, guint8 * buf)
-{
- gint oy, ox, iy, ix;
-
- for (oy = 0; oy < ssim->height; oy++) {
- for (ox = 0; ox < ssim->width; ox++) {
- gfloat mu = 0;
- gfloat elsumm;
- gint weight_y_base, weight_x_base;
- gint weight_offset;
- gint pixel_offset;
- gint winstart_y;
- gint wghstart_y;
- gint winend_y;
- gint winstart_x;
- gint wghstart_x;
- gint winend_x;
- gfloat weight;
- gint source_offset;
-
- source_offset = oy * ssim->width + ox;
-
- winstart_x = ssim->windows[source_offset].x_window_start;
- wghstart_x = ssim->windows[source_offset].x_weight_start;
- winend_x = ssim->windows[source_offset].x_window_end;
- winstart_y = ssim->windows[source_offset].y_window_start;
- wghstart_y = ssim->windows[source_offset].y_weight_start;
- winend_y = ssim->windows[source_offset].y_window_end;
- elsumm = ssim->windows[source_offset].element_summ;
-
- switch (ssim->windowtype) {
- case 0:
- for (iy = winstart_y; iy <= winend_y; iy++) {
- pixel_offset = iy * ssim->width;
- for (ix = winstart_x; ix <= winend_x; ix++)
- mu += buf[pixel_offset + ix];
- }
- mu = mu / elsumm;
- break;
- case 1:
-
- weight_y_base = wghstart_y - winstart_y;
- weight_x_base = wghstart_x - winstart_x;
-
- for (iy = winstart_y; iy <= winend_y; iy++) {
- pixel_offset = iy * ssim->width;
- weight_offset = (weight_y_base + iy) * ssim->windowsize +
- weight_x_base;
- for (ix = winstart_x; ix <= winend_x; ix++) {
- weight = ssim->weights[weight_offset + ix];
- mu += weight * buf[pixel_offset + ix];
- }
- }
- mu = mu / elsumm;
- break;
- }
- outmu[oy * ssim->width + ox] = mu;
- }
- }
-
-}
-
-static void
-calcssim_without_mu (GstSSim * ssim, guint8 * org, gfloat * orgmu, guint8 * mod,
- guint8 * out, gfloat * mean, gfloat * lowest, gfloat * highest)
-{
- gint oy, ox, iy, ix;
- gfloat cumulative_ssim = 0;
- *lowest = G_MAXFLOAT;
- *highest = -G_MAXFLOAT;
-
- for (oy = 0; oy < ssim->height; oy++) {
- for (ox = 0; ox < ssim->width; ox++) {
- gfloat mu_o = 128, mu_m = 128;
- gdouble sigma_o = 0, sigma_m = 0, sigma_om = 0;
- gfloat tmp1 = 0, tmp2 = 0;
- gfloat elsumm = 0;
- gint weight_y_base, weight_x_base;
- gint weight_offset;
- gint pixel_offset;
- gint winstart_y;
- gint wghstart_y;
- gint winend_y;
- gint winstart_x;
- gint wghstart_x;
- gint winend_x;
- gfloat weight;
- gint source_offset;
-
- source_offset = oy * ssim->width + ox;
-
- winstart_x = ssim->windows[source_offset].x_window_start;
- wghstart_x = ssim->windows[source_offset].x_weight_start;
- winend_x = ssim->windows[source_offset].x_window_end;
- winstart_y = ssim->windows[source_offset].y_window_start;
- wghstart_y = ssim->windows[source_offset].y_weight_start;
- winend_y = ssim->windows[source_offset].y_window_end;
- elsumm = ssim->windows[source_offset].element_summ;
-
- weight_y_base = wghstart_y - winstart_y;
- weight_x_base = wghstart_x - winstart_x;
- switch (ssim->windowtype) {
- case 0:
- for (iy = winstart_y; iy <= winend_y; iy++) {
- guint8 *org_with_offset, *mod_with_offset;
- pixel_offset = iy * ssim->width;
- org_with_offset = &org[pixel_offset];
- mod_with_offset = &mod[pixel_offset];
- for (ix = winstart_x; ix <= winend_x; ix++) {
- tmp1 = org_with_offset[ix] - mu_o;
- sigma_o += tmp1 * tmp1;
- tmp2 = mod_with_offset[ix] - mu_m;
- sigma_m += tmp2 * tmp2;
- sigma_om += tmp1 * tmp2;
- }
- }
- break;
- case 1:
-
- weight_y_base = wghstart_y - winstart_y;
- weight_x_base = wghstart_x - winstart_x;
-
- for (iy = winstart_y; iy <= winend_y; iy++) {
- guint8 *org_with_offset, *mod_with_offset;
- gfloat *weights_with_offset;
- gfloat wt1, wt2;
- pixel_offset = iy * ssim->width;
- weight_offset = (weight_y_base + iy) * ssim->windowsize +
- weight_x_base;
- org_with_offset = &org[pixel_offset];
- mod_with_offset = &mod[pixel_offset];
- weights_with_offset = &ssim->weights[weight_offset];
- for (ix = winstart_x; ix <= winend_x; ix++) {
- weight = weights_with_offset[ix];
- tmp1 = org_with_offset[ix] - mu_o;
- tmp2 = mod_with_offset[ix] - mu_m;
- wt1 = weight * tmp1;
- wt2 = weight * tmp2;
- sigma_o += wt1 * tmp1;
- sigma_m += wt2 * tmp2;
- sigma_om += wt1 * tmp2;
- }
- }
- break;
- }
- sigma_o = sqrt (sigma_o / elsumm);
- sigma_m = sqrt (sigma_m / elsumm);
- sigma_om = sigma_om / elsumm;
- tmp1 = (2 * mu_o * mu_m + ssim->const1) * (2 * sigma_om + ssim->const2) /
- ((mu_o * mu_o + mu_m * mu_m + ssim->const1) *
- (sigma_o * sigma_o + sigma_m * sigma_m + ssim->const2));
-
- /* SSIM can go negative, that's why it is
- 127 + index * 128 instead of index * 255 */
- out[oy * ssim->width + ox] = 127 + tmp1 * 128;
- *lowest = MIN (*lowest, tmp1);
- *highest = MAX (*highest, tmp1);
- cumulative_ssim += tmp1;
- }
- }
- *mean = cumulative_ssim / (ssim->width * ssim->height);
-}
-
-static void
-calcssim_canonical (GstSSim * ssim, guint8 * org, gfloat * orgmu, guint8 * mod,
- guint8 * out, gfloat * mean, gfloat * lowest, gfloat * highest)
-{
- gint oy, ox, iy, ix;
- gfloat cumulative_ssim = 0;
- *lowest = G_MAXFLOAT;
- *highest = -G_MAXFLOAT;
-
- for (oy = 0; oy < ssim->height; oy++) {
- for (ox = 0; ox < ssim->width; ox++) {
- gfloat mu_o = 0, mu_m = 0;
- gdouble sigma_o = 0, sigma_m = 0, sigma_om = 0;
- gfloat tmp1, tmp2;
- gfloat elsumm = 0;
- gint weight_y_base, weight_x_base;
- gint weight_offset;
- gint pixel_offset;
- gint winstart_y;
- gint wghstart_y;
- gint winend_y;
- gint winstart_x;
- gint wghstart_x;
- gint winend_x;
- gfloat weight;
- gint source_offset;
-
- source_offset = oy * ssim->width + ox;
-
- winstart_x = ssim->windows[source_offset].x_window_start;
- wghstart_x = ssim->windows[source_offset].x_weight_start;
- winend_x = ssim->windows[source_offset].x_window_end;
- winstart_y = ssim->windows[source_offset].y_window_start;
- wghstart_y = ssim->windows[source_offset].y_weight_start;
- winend_y = ssim->windows[source_offset].y_window_end;
- elsumm = ssim->windows[source_offset].element_summ;
-
- switch (ssim->windowtype) {
- case 0:
- for (iy = winstart_y; iy <= winend_y; iy++) {
- pixel_offset = iy * ssim->width;
- for (ix = winstart_x; ix <= winend_x; ix++) {
- mu_m += mod[pixel_offset + ix];
- }
- }
- mu_m = mu_m / elsumm;
- mu_o = orgmu[oy * ssim->width + ox];
- for (iy = winstart_y; iy <= winend_y; iy++) {
- pixel_offset = iy * ssim->width;
- for (ix = winstart_x; ix <= winend_x; ix++) {
- tmp1 = org[pixel_offset + ix] - mu_o;
- tmp2 = mod[pixel_offset + ix] - mu_m;
- sigma_o += tmp1 * tmp1;
- sigma_m += tmp2 * tmp2;
- sigma_om += tmp1 * tmp2;
- }
- }
- break;
- case 1:
-
- weight_y_base = wghstart_y - winstart_y;
- weight_x_base = wghstart_x - winstart_x;
-
- for (iy = winstart_y; iy <= winend_y; iy++) {
- pixel_offset = iy * ssim->width;
- weight_offset = (weight_y_base + iy) * ssim->windowsize +
- weight_x_base;
- for (ix = winstart_x; ix <= winend_x; ix++) {
- weight = ssim->weights[weight_offset + ix];
- mu_o += weight * org[pixel_offset + ix];
- mu_m += weight * mod[pixel_offset + ix];
- }
- }
- mu_m = mu_m / elsumm;
- mu_o = orgmu[oy * ssim->width + ox];
- for (iy = winstart_y; iy <= winend_y; iy++) {
- gfloat *weights_with_offset;
- guint8 *org_with_offset, *mod_with_offset;
- gfloat wt1, wt2;
- pixel_offset = iy * ssim->width;
- weight_offset = (weight_y_base + iy) * ssim->windowsize +
- weight_x_base;
- weights_with_offset = &ssim->weights[weight_offset];
- org_with_offset = &org[pixel_offset];
- mod_with_offset = &mod[pixel_offset];
- for (ix = winstart_x; ix <= winend_x; ix++) {
- weight = weights_with_offset[ix];
- tmp1 = org_with_offset[ix] - mu_o;
- tmp2 = mod_with_offset[ix] - mu_m;
- wt1 = weight * tmp1;
- wt2 = weight * tmp2;
- sigma_o += wt1 * tmp1;
- sigma_m += wt2 * tmp2;
- sigma_om += wt1 * tmp2;
- }
- }
- break;
- }
- sigma_o = sqrt (sigma_o / elsumm);
- sigma_m = sqrt (sigma_m / elsumm);
- sigma_om = sigma_om / elsumm;
- tmp1 = (2 * mu_o * mu_m + ssim->const1) * (2 * sigma_om + ssim->const2) /
- ((mu_o * mu_o + mu_m * mu_m + ssim->const1) *
- (sigma_o * sigma_o + sigma_m * sigma_m + ssim->const2));
-
- /* SSIM can go negative, that's why it is
- 127 + index * 128 instead of index * 255 */
- out[oy * ssim->width + ox] = 127 + tmp1 * 128;
- *lowest = MIN (*lowest, tmp1);
- *highest = MAX (*highest, tmp1);
- cumulative_ssim += tmp1;
- }
- }
- *mean = cumulative_ssim / (ssim->width * ssim->height);
-}
-
-
-/* the first caps we receive on any of the sinkpads will define the caps for all
- * the other sinkpads because we can only measure streams with the same caps.
- */
-static gboolean
-gst_ssim_setcaps (GstPad * pad, GstCaps * caps)
-{
- GstSSim *ssim;
- GList *pads;
- const char *media_type;
- GstStructure *capsstr;
- gint width, height, fps_n, fps_d;
- guint32 fourcc;
-
- ssim = GST_SSIM (GST_PAD_PARENT (pad));
-
- GST_DEBUG_OBJECT (ssim, "setting caps on pad %p,%s to %" GST_PTR_FORMAT, pad,
- GST_PAD_NAME (pad), caps);
-
- capsstr = gst_caps_get_structure (caps, 0);
- gst_structure_get_int (capsstr, "width", &width);
- gst_structure_get_int (capsstr, "height", &height);
- gst_structure_get_fraction (capsstr, "framerate", &fps_n, &fps_d);
- gst_structure_get_fourcc (capsstr, "format", &fourcc);
-
- GST_OBJECT_LOCK (ssim);
-
- /* Sink caps are stored only once. At the moment it doesn't feel
- * right to measure streams with variable caps.
- */
- if (G_UNLIKELY (!ssim->sinkcaps)) {
- GstStructure *newstr;
- GValue list = { 0, }
- , fourcc = {
- 0,};
-
- g_value_init (&list, GST_TYPE_LIST);
- g_value_init (&fourcc, GST_TYPE_FOURCC);
-
- gst_value_set_fourcc (&fourcc, GST_MAKE_FOURCC ('I', '4', '2', '0'));
- gst_value_list_append_value (&list, &fourcc);
- gst_value_set_fourcc (&fourcc, GST_MAKE_FOURCC ('Y', 'V', '1', '2'));
- gst_value_list_append_value (&list, &fourcc);
- gst_value_set_fourcc (&fourcc, GST_MAKE_FOURCC ('Y', '4', '1', 'B'));
- gst_value_list_append_value (&list, &fourcc);
- gst_value_set_fourcc (&fourcc, GST_MAKE_FOURCC ('Y', '4', '2', 'B'));
- gst_value_list_append_value (&list, &fourcc);
-
- newstr = gst_structure_new ("video/x-raw-yuv", NULL);
- gst_structure_set (newstr, "width", G_TYPE_INT, width, NULL);
- gst_structure_set (newstr, "height", G_TYPE_INT, height, NULL);
- gst_structure_set_value (newstr, "format", &list);
-
- ssim->sinkcaps = gst_caps_new_full (newstr, NULL);
-
- g_value_unset (&list);
- g_value_unset (&fourcc);
- }
-
- if (G_UNLIKELY (!ssim->srccaps)) {
- GstStructure *newstr;
-
- newstr = gst_structure_new ("video/x-raw-gray", NULL);
- gst_structure_set (newstr, "width", G_TYPE_INT, width, NULL);
- gst_structure_set (newstr, "height", G_TYPE_INT, height, NULL);
- gst_structure_set (newstr, "framerate", GST_TYPE_FRACTION, fps_n, fps_d,
- NULL);
- /* Calculates SSIM only for Y channel, hence the output is monochrome.
- * TODO: an option (a mask?) to calculate SSIM for more than one channel,
- * will probably output RGB, one metric per channel...that would
- * look kinda funny :)
- */
- gst_structure_set (newstr, "bpp", G_TYPE_INT, 8, "depth", G_TYPE_INT, 8,
- NULL);
-
- ssim->srccaps = gst_caps_new_full (newstr, NULL);
- }
-
- pads = GST_ELEMENT (ssim)->pads;
- while (pads) {
- GstPadDirection direction;
- GstPad *otherpad = GST_PAD (pads->data);
- direction = gst_pad_get_direction (otherpad);
-
- GST_DEBUG_OBJECT (ssim, "checking caps on pad %p", otherpad);
- if (direction == GST_PAD_SINK) {
- gchar *capstr;
- capstr = gst_caps_to_string (GST_PAD_CAPS (otherpad));
- GST_DEBUG_OBJECT (ssim, "old caps on pad %p,%s were %s", otherpad,
- GST_PAD_NAME (otherpad), capstr);
- g_free (capstr);
- gst_caps_replace (&GST_PAD_CAPS (otherpad), ssim->sinkcaps);
- capstr = gst_caps_to_string (ssim->sinkcaps);
- GST_DEBUG_OBJECT (ssim, "new caps on pad %p,%s are %s", otherpad,
- GST_PAD_NAME (otherpad), capstr);
- g_free (capstr);
- } else if (direction == GST_PAD_SRC) {
- gst_caps_replace (&GST_PAD_CAPS (otherpad), ssim->srccaps);
- }
- pads = g_list_next (pads);
- }
-
- /* parse caps now */
- media_type = gst_structure_get_name (capsstr);
- GST_DEBUG_OBJECT (ssim, "media type is %s", media_type);
- if (strcmp (media_type, "video/x-raw-yuv") == 0) {
- ssim->width = width;
- ssim->height = height;
- ssim->frame_rate = fps_n;
- ssim->frame_rate_base = fps_d;
-
- GST_INFO_OBJECT (ssim, "parse_caps sets ssim to yuv format "
- "%d, %dx%d, %d/%d fps", fourcc, ssim->width, ssim->height,
- ssim->frame_rate, ssim->frame_rate_base);
-
- /* Only planar formats are supported.
- * TODO: implement support for interleaved formats
- * Only YUV formats are supported. There's no sense in calculating the
- * index for R, G or B channels separately.
- */
- switch (fourcc) {
- case GST_MAKE_FOURCC ('I', '4', '2', '0'):
- case GST_MAKE_FOURCC ('Y', 'V', '1', '2'):
- case GST_MAKE_FOURCC ('Y', '4', '1', 'B'):
- case GST_MAKE_FOURCC ('Y', '4', '2', 'B'):
- break;
- default:
- goto not_supported;
- }
-
- } else {
- goto not_supported;
- }
-
- GST_OBJECT_UNLOCK (ssim);
- return TRUE;
- /* ERRORS */
-not_supported:
- {
- GST_OBJECT_UNLOCK (ssim);
- GST_DEBUG_OBJECT (ssim, "unsupported format set as caps");
- return FALSE;
- }
-}
-
-static gboolean
-gst_ssim_query_latency (GstSSim * ssim, GstQuery * query)
-{
- GstClockTime min, max;
- gboolean live;
- gboolean res;
- GstIterator *it;
- gboolean done;
-
- res = TRUE;
- done = FALSE;
-
- live = FALSE;
- min = 0;
- max = GST_CLOCK_TIME_NONE;
-
- /* Take maximum of all latency values */
- it = gst_element_iterate_sink_pads (GST_ELEMENT_CAST (ssim));
- while (!done) {
- GstIteratorResult ires;
-
- gpointer item;
-
- ires = gst_iterator_next (it, &item);
- switch (ires) {
- case GST_ITERATOR_DONE:
- done = TRUE;
- break;
- case GST_ITERATOR_OK:
- {
- GstPad *pad = GST_PAD_CAST (item);
- GstQuery *peerquery;
- GstClockTime min_cur, max_cur;
- gboolean live_cur;
-
- peerquery = gst_query_new_latency ();
-
- /* Ask peer for latency */
- res &= gst_pad_peer_query (pad, peerquery);
-
- /* take max from all valid return values */
- if (res) {
- gst_query_parse_latency (peerquery, &live_cur, &min_cur, &max_cur);
-
- if (live_cur) {
- if (min_cur > min)
- min = min_cur;
-
- if (max == GST_CLOCK_TIME_NONE)
- max = max_cur;
- else if (max_cur < max)
- max = max_cur;
-
- live = TRUE;
- }
- }
-
- gst_query_unref (peerquery);
- gst_object_unref (pad);
- break;
- }
- case GST_ITERATOR_RESYNC:
- live = FALSE;
- min = 0;
- max = GST_CLOCK_TIME_NONE;
- res = TRUE;
- gst_iterator_resync (it);
- break;
- default:
- res = FALSE;
- done = TRUE;
- break;
- }
- }
- gst_iterator_free (it);
-
- if (res) {
- /* store the results */
- GST_DEBUG_OBJECT (ssim, "Calculated total latency: live %s, min %"
- GST_TIME_FORMAT ", max %" GST_TIME_FORMAT,
- (live ? "yes" : "no"), GST_TIME_ARGS (min), GST_TIME_ARGS (max));
- gst_query_set_latency (query, live, min, max);
- }
-
- return res;
-}
-
-static gboolean
-gst_ssim_query_duration (GstSSim * ssim, GstQuery * query)
-{
- gint64 max, min;
- gboolean res;
- GstFormat format;
- GstIterator *it;
- gboolean done;
-
- /* parse format */
- gst_query_parse_duration (query, &format, NULL);
-
- max = -1;
- min = G_MAXINT64;
- res = TRUE;
- done = FALSE;
-
- it = gst_element_iterate_sink_pads (GST_ELEMENT_CAST (ssim));
- while (!done) {
- GstIteratorResult ires;
-
- gpointer item;
-
- ires = gst_iterator_next (it, &item);
- switch (ires) {
- case GST_ITERATOR_DONE:
- done = TRUE;
- break;
- case GST_ITERATOR_OK:
- {
- GstPad *pad = GST_PAD_CAST (item);
-
- gint64 duration;
-
- /* ask sink peer for duration */
- res &= gst_pad_query_peer_duration (pad, &format, &duration);
- /* take min&max from all valid return values */
- if (res) {
- /* valid unknown length, stop searching */
- if (duration == -1) {
- max = duration;
- done = TRUE;
- }
- /* else see if bigger than current max */
- else {
- if (duration > max)
- max = duration;
- if (duration < min)
- min = duration;
- }
- }
- gst_object_unref (pad);
- break;
- }
- case GST_ITERATOR_RESYNC:
- max = -1;
- min = G_MAXINT64;
- res = TRUE;
- gst_iterator_resync (it);
- break;
- default:
- res = FALSE;
- done = TRUE;
- break;
- }
- }
- gst_iterator_free (it);
-
- if (res) {
- /* and store the max */
- GST_DEBUG_OBJECT (ssim, "Total duration in format %s: %"
- GST_TIME_FORMAT, gst_format_get_name (format), GST_TIME_ARGS (min));
- gst_query_set_duration (query, format, min);
- }
-
- return res;
-}
-
-
-static gboolean
-gst_ssim_query (GstPad * pad, GstQuery * query)
-{
- GstSSim *ssim = GST_SSIM (gst_pad_get_parent (pad));
- gboolean res = FALSE;
-
- switch (GST_QUERY_TYPE (query)) {
- case GST_QUERY_POSITION:
- {
- GstFormat format;
-
- gst_query_parse_position (query, &format, NULL);
-
- switch (format) {
- case GST_FORMAT_TIME:
- /* FIXME, bring to stream time, might be tricky */
- gst_query_set_position (query, format, ssim->timestamp);
- res = TRUE;
- break;
- case GST_FORMAT_DEFAULT:
- gst_query_set_position (query, format, ssim->offset);
- res = TRUE;
- break;
- default:
- break;
- }
- break;
- }
- case GST_QUERY_DURATION:
- res = gst_ssim_query_duration (ssim, query);
- break;
- case GST_QUERY_LATENCY:
- res = gst_ssim_query_latency (ssim, query);
- break;
- default:
- /* FIXME, needs a custom query handler because we have multiple
- * sinkpads
- */
- res = gst_pad_query_default (pad, query);
- break;
- }
-
- gst_object_unref (ssim);
- return res;
-}
-
-static gboolean
-forward_event_func (GstPad * pad, GValue * ret, GstEvent * event)
-{
- gst_event_ref (event);
- GST_LOG_OBJECT (pad, "About to send event %s", GST_EVENT_TYPE_NAME (event));
- if (!gst_pad_push_event (pad, event)) {
- g_value_set_boolean (ret, FALSE);
- GST_LOG_OBJECT (pad, "Sending event %p (%s) failed.",
- event, GST_EVENT_TYPE_NAME (event));
- } else {
- GST_LOG_OBJECT (pad, "Sent event %p (%s).",
- event, GST_EVENT_TYPE_NAME (event));
- }
- gst_object_unref (pad);
- return TRUE;
-}
-
-/* forwards the event to all sinkpads, takes ownership of the
- * event
- *
- * Returns: TRUE if the event could be forwarded on all
- * sinkpads.
- */
-static gboolean
-forward_event (GstSSim * ssim, GstEvent * event)
-{
- GstIterator *it;
- GValue vret = { 0 };
-
- GST_LOG_OBJECT (ssim, "Forwarding event %p (%s)", event,
- GST_EVENT_TYPE_NAME (event));
-
- g_value_init (&vret, G_TYPE_BOOLEAN);
- g_value_set_boolean (&vret, TRUE);
- it = gst_element_iterate_sink_pads (GST_ELEMENT_CAST (ssim));
- gst_iterator_fold (it, (GstIteratorFoldFunction) forward_event_func, &vret,
- event);
- gst_iterator_free (it);
- gst_event_unref (event);
-
- return g_value_get_boolean (&vret);
-}
-
-static gboolean
-gst_ssim_src_event (GstPad * pad, GstEvent * event)
-{
- GstSSim *ssim;
- gboolean result;
-
- ssim = GST_SSIM (gst_pad_get_parent (pad));
-
- switch (GST_EVENT_TYPE (event)) {
- case GST_EVENT_QOS:
- /* QoS might be tricky */
- result = FALSE;
- break;
- case GST_EVENT_SEEK:
- {
- GstSeekFlags flags;
- GstSeekType curtype;
- gint64 cur;
-
- /* parse the seek parameters */
- gst_event_parse_seek (event, &ssim->segment_rate, NULL, &flags, &curtype,
- &cur, NULL, NULL);
-
- /* check if we are flushing */
- if (flags & GST_SEEK_FLAG_FLUSH) {
- /* make sure we accept nothing anymore and return WRONG_STATE */
- gst_collect_pads_set_flushing (ssim->collect, TRUE);
-
- /* flushing seek, start flush downstream, the flush will be done
- * when all pads received a FLUSH_STOP. */
- gst_pad_push_event (pad, gst_event_new_flush_start ());
- }
- /* now wait for the collected to be finished and mark a new
- * segment */
- GST_OBJECT_LOCK (ssim->collect);
- if (curtype == GST_SEEK_TYPE_SET)
- ssim->segment_position = cur;
- else
- ssim->segment_position = 0;
- {
- GstSSimOutputContext *c;
- gint i = 0;
- for (i = 0; i < ssim->src->len; i++) {
- c = (GstSSimOutputContext *) g_ptr_array_index (ssim->src, i);
- c->segment_pending = TRUE;
- }
- }
- GST_OBJECT_UNLOCK (ssim->collect);
-
- result = forward_event (ssim, event);
- break;
- }
- case GST_EVENT_NAVIGATION:
- /* navigation is rather pointless. */
- result = FALSE;
- break;
- default:
- /* just forward the rest for now */
- result = forward_event (ssim, event);
- break;
- }
- gst_object_unref (ssim);
-
- return result;
-}
-
-static gboolean
-gst_ssim_sink_event (GstPad * pad, GstEvent * event)
-{
- GstSSim *ssim;
- gboolean ret;
-
- ssim = GST_SSIM (gst_pad_get_parent (pad));
-
- GST_DEBUG ("Got %s event on pad %s:%s", GST_EVENT_TYPE_NAME (event),
- GST_DEBUG_PAD_NAME (pad));
-
- switch (GST_EVENT_TYPE (event)) {
- case GST_EVENT_NEWSEGMENT:
- {
- gboolean update;
- gdouble rate;
- gdouble applied_rate;
- GstFormat format;
- gint64 start;
- gint64 stop;
- gint64 position;
- gst_event_parse_new_segment_full (event, &update, &rate, &applied_rate,
- &format, &start, &stop, &position);
- GST_DEBUG ("NEWSEGMENTEVENT: update(%d), rate(%f), app_rate(%f), "
- "format(%d), start(%" GST_TIME_FORMAT ") stop(%" GST_TIME_FORMAT ") "
- "position(%" GST_TIME_FORMAT ")", update, rate, applied_rate, format,
- GST_TIME_ARGS (start), GST_TIME_ARGS (stop),
- GST_TIME_ARGS (position));
- break;
- }
- case GST_EVENT_FLUSH_STOP:
- /* mark a pending new segment. This event is synchronized
- * with the streaming thread so we can safely update the
- * variable without races. It's somewhat weird because we
- * assume the collectpads forwarded the FLUSH_STOP past us
- * and downstream (using our source pad, the bastard!).
- */
- {
- GstSSimOutputContext *c;
- gint i = 0;
- for (i = 0; i < ssim->src->len; i++) {
- c = (GstSSimOutputContext *) g_ptr_array_index (ssim->src, i);
- c->segment_pending = TRUE;
- }
- }
- break;
- default:
- break;
- }
-
- /* now GstCollectPads can take care of the rest, e.g. EOS */
- GST_DEBUG ("Dispatching %s event on pad %s:%s", GST_EVENT_TYPE_NAME (event),
- GST_DEBUG_PAD_NAME (pad));
- ret = ssim->collect_event (pad, event);
- GST_DEBUG ("Event %s on pad %s:%s is dispatched", GST_EVENT_TYPE_NAME (event),
- GST_DEBUG_PAD_NAME (pad));
- gst_object_unref (ssim);
- return ret;
-}
-
-static void
-gst_ssim_set_property (GObject * object, guint prop_id,
- const GValue * value, GParamSpec * pspec)
-{
- GstSSim *ssim;
-
- ssim = GST_SSIM (object);
-
- switch (prop_id) {
- case PROP_SSIM_TYPE:
- ssim->ssimtype = g_value_get_int (value);
- break;
- case PROP_WINDOW_TYPE:
- ssim->windowtype = g_value_get_int (value);
- g_free (ssim->windows);
- ssim->windows = NULL;
- break;
- case PROP_WINDOW_SIZE:
- ssim->windowsize = g_value_get_int (value);
- g_free (ssim->windows);
- ssim->windows = NULL;
- break;
- case PROP_GAUSS_SIGMA:
- ssim->sigma = g_value_get_float (value);
- g_free (ssim->windows);
- ssim->windows = NULL;
- break;
- default:
- G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
- break;
- }
-}
-
-static void
-gst_ssim_get_property (GObject * object, guint prop_id, GValue * value,
- GParamSpec * pspec)
-{
- GstSSim *ssim;
-
- ssim = GST_SSIM (object);
-
- switch (prop_id) {
- case PROP_SSIM_TYPE:
- g_value_set_int (value, ssim->ssimtype);
- break;
- case PROP_WINDOW_TYPE:
- g_value_set_int (value, ssim->windowtype);
- break;
- case PROP_WINDOW_SIZE:
- g_value_set_int (value, ssim->windowsize);
- break;
- case PROP_GAUSS_SIGMA:
- g_value_set_float (value, ssim->sigma);
- break;
- default:
- G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
- break;
- }
-}
-
-
-static void
-gst_ssim_class_init (GstSSimClass * klass)
-{
- GObjectClass *gobject_class = (GObjectClass *) klass;
- GstElementClass *gstelement_class = (GstElementClass *) klass;
-
- gobject_class->set_property = gst_ssim_set_property;
- gobject_class->get_property = gst_ssim_get_property;
- gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_ssim_finalize);
-
- g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_SSIM_TYPE,
- g_param_spec_int ("ssim-type", "SSIM type",
- "Type of the SSIM metric. 0 - canonical. 1 - with fixed mu "
- "(almost the same results, but roughly 20% faster)",
- 0, 1, 0, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
-
- g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_WINDOW_TYPE,
- g_param_spec_int ("window-type", "Window type",
- "Type of the weighting in the window. "
- "0 - no weighting. 1 - Gaussian weighting (controlled by \"sigma\")",
- 0, 1, 1, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
-
- g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_WINDOW_SIZE,
- g_param_spec_int ("window-size", "Window size",
- "Size of a window.", 1, 22, 11,
- G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
-
- g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_GAUSS_SIGMA,
- g_param_spec_float ("gauss-sigma", "Deviation (for Gauss function)",
- "Used to calculate Gussian weights "
- "(only when using Gaussian window).",
- G_MINFLOAT, 10, 1.5, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
-
- gst_element_class_add_static_pad_template (gstelement_class,
- &gst_ssim_src_template);
- gst_element_class_add_static_pad_template (gstelement_class,
- &gst_ssim_sink_original_template);
- gst_element_class_add_static_pad_template (gstelement_class,
- &gst_ssim_sink_modified_template);
- gst_element_class_set_static_metadata (gstelement_class, "SSim",
- "Filter/Analyzer/Video", "Calculate Y-SSIM for n+2 YUV video streams",
- "Руслан Ижбулатов <lrn1986 _at_ gmail _dot_ com>");
-
- parent_class = g_type_class_peek_parent (klass);
-
- gstelement_class->request_new_pad =
- GST_DEBUG_FUNCPTR (gst_ssim_request_new_pad);
- gstelement_class->release_pad = GST_DEBUG_FUNCPTR (gst_ssim_release_pad);
-
- gstelement_class->change_state = GST_DEBUG_FUNCPTR (gst_ssim_change_state);
-}
-
-static GstPad *
-gst_ssim_request_new_pad (GstElement * element, GstPadTemplate * templ,
- const gchar * padname)
-{
- gchar *name;
- GstSSim *ssim;
- GstPad *newpad;
- GstPad *newsrc;
- gint padcount;
- GstPadTemplate *template;
- guint num = -1;
-
- if (templ->direction != GST_PAD_SINK)
- goto not_sink;
-
- ssim = GST_SSIM (element);
-
- padcount = ssim->padcount;
-
- GST_DEBUG_OBJECT (ssim, "number of pads = %d", padcount);
-
- if (padname)
- GST_DEBUG_OBJECT (ssim, "reqested pad %s", padname);
- else
- goto unnamed_pad;
-
- if (strcmp (padname, "original") == 0) {
- newpad = gst_pad_new_from_template (templ, "original");
- GST_DEBUG_OBJECT (ssim, "request new sink pad original");
- ssim->orig = newpad;
- } else if (strncmp (padname, "modified_", 9) == 0) {
- const gchar *numstr = &padname[9];
- num = strtoul (numstr, NULL, 10);
- if (errno == EINVAL || errno == ERANGE)
- goto bad_name;
- newpad = gst_pad_new_from_template (templ, padname);
- GST_DEBUG_OBJECT (ssim, "request new sink pad %s", padname);
- } else
- goto bad_name;
-
- gst_pad_set_getcaps_function (newpad,
- GST_DEBUG_FUNCPTR (gst_ssim_sink_getcaps));
- gst_pad_set_setcaps_function (newpad, GST_DEBUG_FUNCPTR (gst_ssim_setcaps));
- gst_collect_pads_add_pad (ssim->collect, newpad, sizeof (GstCollectData),
- NULL, TRUE);
-
- /* FIXME: hacked way to override/extend the event function of
- * GstCollectPads; because it sets its own event function giving the
- * element no access to events
- */
- GST_DEBUG_OBJECT (ssim, "Current collect_event is %p, changing to %p",
- ssim->collect_event, GST_PAD_EVENTFUNC (newpad));
- ssim->collect_event = (GstPadEventFunction) GST_PAD_EVENTFUNC (newpad);
- gst_pad_set_event_function (newpad, GST_DEBUG_FUNCPTR (gst_ssim_sink_event));
-
- GST_DEBUG_OBJECT (ssim, "Adding a pad...");
- /* takes ownership of the pad */
- if (!gst_element_add_pad (GST_ELEMENT (ssim), newpad))
- goto could_not_add_sink;
- else
- /* increment pad counter */
- padcount = g_atomic_int_add (&ssim->padcount, 1);
-
- if (num != -1) {
- GstSSimOutputContext *c;
-
- template = gst_static_pad_template_get (&gst_ssim_src_template);
- name = g_strdup_printf ("src_%u", num);
- newsrc = gst_pad_new_from_template (template, name);
- GST_DEBUG_OBJECT (ssim, "creating src pad %s", name);
- g_free (name);
- gst_object_unref (template);
-
- gst_pad_set_getcaps_function (newsrc,
- GST_DEBUG_FUNCPTR (gst_ssim_src_getcaps));
- gst_pad_set_query_function (newsrc, GST_DEBUG_FUNCPTR (gst_ssim_query));
- gst_pad_set_event_function (newsrc, GST_DEBUG_FUNCPTR (gst_ssim_src_event));
-
- if (!gst_element_add_pad (GST_ELEMENT (ssim), newsrc))
- goto could_not_add_src;
-
- c = g_new (GstSSimOutputContext, 1);
- c->pad = newsrc;
- g_object_set_data (G_OBJECT (newpad), "ssim-match-output-context", c);
- g_ptr_array_add (ssim->src, (gpointer) c);
- }
-
- return newpad;
-
- /* errors */
-bad_name:
- {
- g_warning ("gstssim: request new pad with bad name %s (must be "
- "'modified')\n", padname);
- return NULL;
- }
-unnamed_pad:
- {
- g_warning ("gstssim: request new pad without a name (must be "
- "'modified')\n");
- return NULL;
- }
-not_sink:
- {
- g_warning ("gstssim: request new pad that is not a SINK pad\n");
- return NULL;
- }
-could_not_add_src:
- {
- GST_DEBUG_OBJECT (ssim, "could not add src pad");
- gst_object_unref (newsrc);
- }
-could_not_add_sink:
- {
- GST_DEBUG_OBJECT (ssim, "could not add sink pad");
- gst_collect_pads_remove_pad (ssim->collect, newpad);
- gst_object_unref (newpad);
- return NULL;
- }
-}
-
-static void
-gst_ssim_release_pad (GstElement * element, GstPad * pad)
-{
- GstSSim *ssim;
-
- ssim = GST_SSIM (element);
-
- GST_DEBUG_OBJECT (ssim, "release pad %s:%s", GST_DEBUG_PAD_NAME (pad));
-
- gst_collect_pads_remove_pad (ssim->collect, pad);
- gst_element_remove_pad (element, pad);
-}
-
-
-static void
-gst_ssim_init (GstSSim * ssim)
-{
- ssim->windowsize = 11;
- ssim->windowtype = 1;
- ssim->windows = NULL;
- ssim->sigma = 1.5;
- ssim->ssimtype = 0;
- ssim->src = g_ptr_array_new ();
- ssim->padcount = 0;
- ssim->collect_event = NULL;
- ssim->sinkcaps = NULL;
-
- /* keep track of the sinkpads requested */
- ssim->collect = gst_collect_pads_new ();
- gst_collect_pads_set_function (ssim->collect,
- GST_DEBUG_FUNCPTR (gst_ssim_collected), ssim);
-}
-
-static void
-gst_ssim_finalize (GObject * object)
-{
- GstSSim *ssim = GST_SSIM (object);
-
- gst_object_unref (ssim->collect);
- ssim->collect = NULL;
-
- g_free (ssim->windows);
- ssim->windows = NULL;
-
- g_free (ssim->weights);
- ssim->weights = NULL;
-
- if (ssim->sinkcaps)
- gst_caps_unref (ssim->sinkcaps);
- if (ssim->srccaps)
- gst_caps_unref (ssim->srccaps);
-
- g_ptr_array_free (ssim->src, TRUE);
-
- G_OBJECT_CLASS (parent_class)->finalize (object);
-}
-
-typedef gfloat (*GstSSimWeightFunc) (GstSSim * ssim, gint y, gint x);
-
-static gfloat
-gst_ssim_weight_func_none (GstSSim * ssim, gint y, gint x)
-{
- return 1;
-}
-
-static gfloat
-gst_ssim_weight_func_gauss (GstSSim * ssim, gint y, gint x)
-{
- gfloat coord = sqrt (x * x + y * y);
- return exp (-1 * (coord * coord) / (2 * ssim->sigma * ssim->sigma)) /
- (ssim->sigma * sqrt (2 * G_PI));
-}
-
-static gboolean
-gst_ssim_regenerate_windows (GstSSim * ssim)
-{
- gint windowiseven;
- gint y, x, y2, x2;
- GstSSimWeightFunc func;
- gfloat normal_summ = 0;
- gint normal_count = 0;
-
- g_free (ssim->weights);
-
- ssim->weights = g_new (gfloat, ssim->windowsize * ssim->windowsize);
-
- windowiseven = ((gint) ssim->windowsize / 2) * 2 == ssim->windowsize ? 1 : 0;
-
- g_free (ssim->windows);
-
- ssim->windows = g_new (GstSSimWindowCache, ssim->height * ssim->width);
-
- switch (ssim->windowtype) {
- case 0:
- func = gst_ssim_weight_func_none;
- break;
- case 1:
- func = gst_ssim_weight_func_gauss;
- break;
- default:
- GST_WARNING_OBJECT (ssim, "unknown window type - %d. Defaulting to %d",
- ssim->windowtype, 1);
- ssim->windowtype = 1;
- func = gst_ssim_weight_func_gauss;
- }
-
- for (y = 0; y < ssim->windowsize; y++) {
- gint yoffset = y * ssim->windowsize;
- for (x = 0; x < ssim->windowsize; x++) {
- ssim->weights[yoffset + x] = func (ssim, x - ssim->windowsize / 2 +
- windowiseven, y - ssim->windowsize / 2 + windowiseven);
- normal_summ += ssim->weights[yoffset + x];
- normal_count++;
- }
- }
-
- for (y = 0; y < ssim->height; y++) {
- for (x = 0; x < ssim->width; x++) {
- GstSSimWindowCache win;
- gint element_count = 0;
-
- win.x_window_start = x - ssim->windowsize / 2 + windowiseven;
- win.x_weight_start = 0;
- if (win.x_window_start < 0) {
- win.x_weight_start = -win.x_window_start;
- win.x_window_start = 0;
- }
-
- win.x_window_end = x + ssim->windowsize / 2;
- if (win.x_window_end >= ssim->width)
- win.x_window_end = ssim->width - 1;
-
- win.y_window_start = y - ssim->windowsize / 2 + windowiseven;
- win.y_weight_start = 0;
- if (win.y_window_start < 0) {
- win.y_weight_start = -win.y_window_start;
- win.y_window_start = 0;
- }
-
- win.y_window_end = y + ssim->windowsize / 2;
- if (win.y_window_end >= ssim->height)
- win.y_window_end = ssim->height - 1;
-
- win.element_summ = 0;
- element_count = (win.y_window_end - win.y_window_start + 1) *
- (win.x_window_end - win.x_window_start + 1);
- if (element_count == normal_count)
- win.element_summ = normal_summ;
- else {
- for (y2 = win.y_weight_start; y2 < ssim->windowsize; y2++) {
- for (x2 = win.x_weight_start; x2 < ssim->windowsize; x2++) {
- win.element_summ += ssim->weights[y2 * ssim->windowsize + x2];
- }
- }
- }
- ssim->windows[(y * ssim->width + x)] = win;
- }
- }
-
- /* FIXME: while 0.01 and 0.03 are pretty much static, the 255 implies that
- * we're working with 8-bit-per-color-component format, which may not be true
- */
- ssim->const1 = 0.01 * 255 * 0.01 * 255;
- ssim->const2 = 0.03 * 255 * 0.03 * 255;
- return TRUE;
-}
-
-static GstFlowReturn
-gst_ssim_collected (GstCollectPads * pads, gpointer user_data)
-{
- GstSSim *ssim;
- GSList *collected;
- GstFlowReturn ret = GST_FLOW_OK;
- GstBuffer *orgbuf = NULL;
- gfloat *orgmu = NULL;
- GstBuffer *outbuf = NULL;
- gpointer outdata = NULL;
- guint outsize = 0;
- gfloat mssim = 0, lowest = 1, highest = -1;
- gboolean ready = TRUE;
- gint padnumber = 0;
-
- ssim = GST_SSIM (user_data);
-
- if (G_UNLIKELY (ssim->windows == NULL)) {
- GST_DEBUG_OBJECT (ssim, "Regenerating windows");
- gst_ssim_regenerate_windows (ssim);
- }
-
- switch (ssim->ssimtype) {
- case 0:
- ssim->func = (GstSSimFunction) calcssim_canonical;
- break;
- case 1:
- ssim->func = (GstSSimFunction) calcssim_without_mu;
- break;
- default:
- return GST_FLOW_ERROR;
- }
-
- for (collected = pads->data; collected; collected = g_slist_next (collected)) {
- GstCollectData *collect_data;
- GstBuffer *inbuf;
-
- collect_data = (GstCollectData *) collected->data;
-
- inbuf = gst_collect_pads_peek (pads, collect_data);
-
- if (inbuf == NULL) {
- GST_LOG_OBJECT (ssim, "channel %p: no bytes available", collect_data);
- ready = FALSE;
- } else
- gst_buffer_unref (inbuf);
- }
-
- /* if _collected() was called, all pads should have data, but if
- * one of them doesn't, it means that it is EOS and we can't go any further
- *
- * FIXME, shouldn't we do something about pads that DO have data?
- * Flush them or something?
- */
- if (G_UNLIKELY (!ready))
- goto eos;
-
- /* Mu is just a blur, we can calculate it once */
- if (ssim->ssimtype == 0) {
- orgmu = g_new (gfloat, ssim->width * ssim->height);
-
- for (collected = pads->data; collected;
- collected = g_slist_next (collected)) {
- GstCollectData *collect_data;
-
- collect_data = (GstCollectData *) collected->data;
-
- if (collect_data->pad == ssim->orig) {
- orgbuf = gst_collect_pads_pop (pads, collect_data);
-
- GST_DEBUG_OBJECT (ssim, "Original stream - flags(0x%x), timestamp(%"
- GST_TIME_FORMAT "), duration(%" GST_TIME_FORMAT ")",
- GST_BUFFER_FLAGS (orgbuf),
- GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (orgbuf)),
- GST_TIME_ARGS (GST_BUFFER_DURATION (orgbuf)));
- calculate_mu (ssim, orgmu, GST_BUFFER_DATA (orgbuf));
-
- break;
- }
- }
- }
-
- GST_LOG_OBJECT (ssim, "starting to cycle through streams");
-
- for (collected = pads->data; collected; collected = g_slist_next (collected)) {
- GstCollectData *collect_data;
- GstBuffer *inbuf;
- guint8 *indata;
-
- collect_data = (GstCollectData *) collected->data;
-
- if (collect_data->pad != ssim->orig) {
- inbuf = gst_collect_pads_pop (pads, collect_data);
-
- indata = GST_BUFFER_DATA (inbuf);
-
- GST_DEBUG_OBJECT (ssim, "Modified stream - flags(0x%x), timestamp(%"
- GST_TIME_FORMAT "), duration(%" GST_TIME_FORMAT ")",
- GST_BUFFER_FLAGS (inbuf),
- GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (inbuf)),
- GST_TIME_ARGS (GST_BUFFER_DURATION (inbuf)));
-
- if (!GST_BUFFER_FLAG_IS_SET (inbuf, GST_BUFFER_FLAG_GAP)) {
- GstSSimOutputContext *c;
- GstEvent *measured;
- guint64 offset;
- GValue vmean = { 0 }
- , vlowest = {
- 0}
- , vhighest = {
- 0};
-
- c = (GstSSimOutputContext *)
- g_object_get_data (G_OBJECT (collect_data->pad),
- "ssim-match-output-context");
-
- GST_DEBUG_OBJECT (ssim, "Output context is %" GST_PTR_FORMAT
- ", pad will be %" GST_PTR_FORMAT, c, c->pad);
-
- outsize = GST_ROUND_UP_4 (ssim->width) * ssim->height;
- GST_LOG_OBJECT (ssim, "channel %p: making output buffer of %d bytes",
- collect_data, outsize);
-
- /* first buffer, alloc outsize.
- * FIXME: we can easily subbuffer and _make_writable.
- * FIXME: only create empty buffer for first non-gap buffer, so that we
- * only use ssim function when really calculating
- */
- outbuf = gst_buffer_new_and_alloc (GST_ROUND_UP_4 (ssim->width) *
- ssim->height);
- outdata = GST_BUFFER_DATA (outbuf);
- gst_buffer_set_caps (outbuf, gst_pad_get_fixed_caps_func (c->pad));
-
- /* Videos should match, so the output video has the same characteristics
- * as the input video
- */
- /* set timestamps on the output buffer */
- gst_buffer_copy_metadata (outbuf, inbuf, (GstBufferCopyFlags)
- GST_BUFFER_COPY_FLAGS | GST_BUFFER_COPY_TIMESTAMPS);
-
- g_value_init (&vmean, G_TYPE_FLOAT);
- g_value_init (&vlowest, G_TYPE_FLOAT);
- g_value_init (&vhighest, G_TYPE_FLOAT);
-
- GST_LOG_OBJECT (ssim, "channel %p: calculating SSIM", collect_data);
-
- ssim->func (ssim, GST_BUFFER_DATA (orgbuf), orgmu, indata, outdata,
- &mssim, &lowest, &highest);
-
- GST_DEBUG_OBJECT (GST_OBJECT (ssim), "MSSIM is %f, l-h is %f - %f",
- mssim, lowest, highest);
-
- gst_ssim_post_message (ssim, outbuf, mssim, lowest, highest);
-
- g_value_set_float (&vmean, mssim);
- g_value_set_float (&vlowest, lowest);
- g_value_set_float (&vhighest, highest);
- offset = GST_BUFFER_OFFSET (inbuf);
-
- /* our timestamping is very simple, just an ever incrementing
- * counter, the new segment time will take care of their respective
- * stream time.
- */
- if (c->segment_pending) {
- GstEvent *event;
-
- /* FIXME, use rate/applied_rate as set on all sinkpads.
- * - currently we just set rate as received from last seek-event
- * We could potentially figure out the duration as well using
- * the current segment positions and the stated stop positions.
- * Also we just start from stream time 0 which is rather
- * weird. For non-synchronized mixing, the time should be
- * the min of the stream times of all received segments,
- * rationale being that the duration is at least going to
- * be as long as the earliest stream we start mixing. This
- * would also be correct for synchronized mixing but then
- * the later streams would be delayed until the stream times`
- * match.
- */
- event = gst_event_new_new_segment_full (FALSE, ssim->segment_rate,
- 1.0, GST_FORMAT_TIME, ssim->timestamp, -1,
- ssim->segment_position);
-
- gst_pad_push_event (c->pad, event);
- c->segment_pending = FALSE;
- }
-
- measured = gst_event_new_measured (offset,
- GST_BUFFER_TIMESTAMP (inbuf), "SSIM", &vmean, &vlowest, &vhighest);
- gst_pad_push_event (c->pad, measured);
-
- /* send it out */
- GST_DEBUG_OBJECT (ssim, "pushing outbuf, timestamp %" GST_TIME_FORMAT
- ", size %d", GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (outbuf)),
- GST_BUFFER_SIZE (outbuf));
- ret &= gst_pad_push (c->pad, outbuf);
-
- } else {
- GST_LOG_OBJECT (ssim, "channel %p: skipping", collect_data);
- }
- gst_buffer_unref (inbuf);
- padnumber++;
- }
- }
- gst_buffer_unref (orgbuf);
-
- if (ssim->ssimtype == 0)
- g_free (orgmu);
-
- ssim->segment_position = 0;
-
- return ret;
-
- /* ERRORS */
-eos:
- {
- gint i;
- GST_DEBUG_OBJECT (ssim, "no data available, must be EOS");
- for (i = 0; i < ssim->src->len; i++) {
- GstSSimOutputContext *c =
- (GstSSimOutputContext *) g_ptr_array_index (ssim->src, i);
- gst_pad_push_event (c->pad, gst_event_new_eos ());
- }
-
- return GST_FLOW_UNEXPECTED;
- }
-}
-
-static GstStateChangeReturn
-gst_ssim_change_state (GstElement * element, GstStateChange transition)
-{
- GstSSim *ssim;
- GstStateChangeReturn ret;
-
- ssim = GST_SSIM (element);
-
- switch (transition) {
- case GST_STATE_CHANGE_NULL_TO_READY:
- break;
- case GST_STATE_CHANGE_READY_TO_PAUSED:
- ssim->timestamp = 0;
- ssim->offset = 0;
- {
- GstSSimOutputContext *c;
- gint i = 0;
- for (i = 0; i < ssim->src->len; i++) {
- c = (GstSSimOutputContext *) g_ptr_array_index (ssim->src, i);
- c->segment_pending = TRUE;
- }
- }
- ssim->segment_position = 0;
- ssim->segment_rate = 1.0;
- gst_segment_init (&ssim->segment, GST_FORMAT_UNDEFINED);
- gst_collect_pads_start (ssim->collect);
- break;
- case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
- break;
- case GST_STATE_CHANGE_PAUSED_TO_READY:
- /* need to unblock the collectpads before calling the
- * parent change_state so that streaming can finish
- */
- gst_collect_pads_stop (ssim->collect);
- break;
- default:
- break;
- }
-
- ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
-
- switch (transition) {
- default:
- break;
- }
-
- return ret;
-}
projects / platform / upstream / gstreamer.git / commitdiff