gstreamer/ext/iqa/iqa.c

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/* Image Quality Assessment plugin
* Copyright (C) 2015 Mathieu Duponchelle <mathieu.duponchelle@collabora.co.uk>
*
* 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.
*/
/**
* SECTION:element-iqa
* @short_description: Image Quality Assessment plugin.
*
* IQA will perform full reference image quality assessment, with the
* first added pad being the reference.
*
* It will perform comparisons on video streams with the same geometry.
*
* The image output will be the heat map of differences, between
* the two pads with the highest measured difference.
*
* For each reference frame, IQA will post a message containing
* a structure named IQA.
*
* The only metric supported for now is "dssim", which will be available
* if https://github.com/pornel/dssim was installed on the system
* at the time that plugin was compiled.
*
* For each metric activated, this structure will contain another
* structure, named after the metric.
*
* The message will also contain a "time" field.
*
* For example, if do-dssim is set to true, and there are
* two compared streams, the emitted structure will look like this:
*
* IQA, dssim=(structure)"dssim\,\ sink_1\=\(double\)0.053621271267184856\,\
* sink_2\=\(double\)0.0082939683976297474\;",
* time=(guint64)0;
*
* <refsect2>
* <title>Example launch line</title>
* |[
* gst-launch-1.0 -m uridecodebin uri=file:///test/file/1 ! iqa name=iqa do-dssim=true \
* ! videoconvert ! autovideosink uridecodebin uri=file:///test/file/2 ! iqa.
* ]| This pipeline will output messages to the console for each set of compared frames.
* </refsect2>
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "iqa.h"
#ifdef HAVE_DSSIM
#include "dssim.h"
#endif
GST_DEBUG_CATEGORY_STATIC (gst_iqa_debug);
#define GST_CAT_DEFAULT gst_iqa_debug
#define SINK_FORMATS " { AYUV, BGRA, ARGB, RGBA, ABGR, Y444, Y42B, YUY2, UYVY, "\
" YVYU, I420, YV12, NV12, NV21, Y41B, RGB, BGR, xRGB, xBGR, "\
" RGBx, BGRx } "
#define SRC_FORMAT " { RGBA } "
static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE (SRC_FORMAT))
);
enum
{
PROP_0,
PROP_DO_SSIM,
PROP_LAST,
};
static GstStaticPadTemplate sink_factory = GST_STATIC_PAD_TEMPLATE ("sink_%u",
GST_PAD_SINK,
GST_PAD_REQUEST,
GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE (SINK_FORMATS))
);
/* GstIqa */
#define gst_iqa_parent_class parent_class
G_DEFINE_TYPE (GstIqa, gst_iqa, GST_TYPE_VIDEO_AGGREGATOR);
#ifdef HAVE_DSSIM
inline static unsigned char
to_byte (float in)
{
if (in <= 0)
return 0;
if (in >= 255.f / 256.f)
return 255;
return in * 256.f;
}
static gboolean
do_dssim (GstIqa * self, GstVideoFrame * ref, GstVideoFrame * cmp,
GstBuffer * outbuf, GstStructure * msg_structure, gchar * padname)
{
dssim_attr *attr = dssim_create_attr ();
gint y;
unsigned char **ptrs, **ptrs2;
GstMapInfo ref_info;
GstMapInfo cmp_info;
GstMapInfo out_info;
dssim_image *ref_image;
dssim_image *cmp_image;
double dssim;
dssim_ssim_map map_meta;
float *map;
gint i;
dssim_rgba *out;
GstStructure *dssim_structure;
gst_structure_get (msg_structure, "dssim", GST_TYPE_STRUCTURE,
&dssim_structure, NULL);
dssim_set_save_ssim_maps (attr, 1, 1);
if (ref->info.width != cmp->info.width ||
ref->info.height != cmp->info.height) {
GST_OBJECT_UNLOCK (self);
GST_ELEMENT_ERROR (self, STREAM, FAILED,
("Video streams do not have the same sizes (add videoscale"
" and force the sizes to be equal on all sink pads.)"),
("Reference width %d - compared width: %d. "
"Reference height %d - compared height: %d",
ref->info.width, cmp->info.width, ref->info.height,
cmp->info.height));
GST_OBJECT_LOCK (self);
return FALSE;
}
gst_buffer_map (ref->buffer, &ref_info, GST_MAP_READ);
gst_buffer_map (cmp->buffer, &cmp_info, GST_MAP_READ);
gst_buffer_map (outbuf, &out_info, GST_MAP_WRITE);
out = (dssim_rgba *) out_info.data;
ptrs = g_malloc (sizeof (char **) * ref->info.height);
for (y = 0; y < ref->info.height; y++) {
ptrs[y] = ref_info.data + (ref->info.width * 4 * y);
}
ref_image =
dssim_create_image (attr, ptrs, DSSIM_RGBA, ref->info.width,
ref->info.height, 0.45455);
ptrs2 = g_malloc (sizeof (char **) * cmp->info.height);
for (y = 0; y < cmp->info.height; y++) {
ptrs2[y] = cmp_info.data + (cmp->info.width * 4 * y);
}
cmp_image =
dssim_create_image (attr, ptrs2, DSSIM_RGBA, cmp->info.width,
cmp->info.height, 0.45455);
dssim = dssim_compare (attr, ref_image, cmp_image);
map_meta = dssim_pop_ssim_map (attr, 0, 0);
if (dssim > self->max_dssim) {
map = map_meta.data;
for (i = 0; i < map_meta.width * map_meta.height; i++) {
const float max = 1.0 - map[i];
const float maxsq = max * max;
out[i] = (dssim_rgba) {
.r = to_byte (max * 3.0),.g = to_byte (maxsq * 6.0),.b =
to_byte (max / ((1.0 - map_meta.dssim) * 4.0)),.a = 255,};
}
self->max_dssim = dssim;
}
gst_structure_set (dssim_structure, padname, G_TYPE_DOUBLE, dssim, NULL);
gst_structure_set (msg_structure, "dssim", GST_TYPE_STRUCTURE,
dssim_structure, NULL);
gst_structure_free (dssim_structure);
g_free (ptrs);
g_free (ptrs2);
gst_buffer_unmap (ref->buffer, &ref_info);
gst_buffer_unmap (cmp->buffer, &cmp_info);
gst_buffer_unmap (outbuf, &out_info);
dssim_dealloc_image (ref_image);
dssim_dealloc_image (cmp_image);
dssim_dealloc_attr (attr);
return TRUE;
}
#endif
static gboolean
compare_frames (GstIqa * self, GstVideoFrame * ref, GstVideoFrame * cmp,
GstBuffer * outbuf, GstStructure * msg_structure, gchar * padname)
{
#ifdef HAVE_DSSIM
if (self->do_dssim) {
if (!do_dssim (self, ref, cmp, outbuf, msg_structure, padname))
return FALSE;
}
#endif
return TRUE;
}
static GstFlowReturn
gst_iqa_aggregate_frames (GstVideoAggregator * vagg, GstBuffer * outbuf)
{
GList *l;
GstVideoFrame *ref_frame = NULL;
GstIqa *self = GST_IQA (vagg);
GstStructure *msg_structure = gst_structure_new_empty ("IQA");
GstMessage *m = gst_message_new_element (GST_OBJECT (self), msg_structure);
GstAggregator *agg = GST_AGGREGATOR (vagg);
if (self->do_dssim) {
gst_structure_set (msg_structure, "dssim", GST_TYPE_STRUCTURE,
gst_structure_new_empty ("dssim"), NULL);
self->max_dssim = 0.0;
}
GST_OBJECT_LOCK (vagg);
for (l = GST_ELEMENT (vagg)->sinkpads; l; l = l->next) {
GstVideoAggregatorPad *pad = l->data;
if (pad->aggregated_frame != NULL) {
if (!ref_frame) {
ref_frame = pad->aggregated_frame;
} else {
gboolean res;
gchar *padname = gst_pad_get_name (pad);
GstVideoFrame *cmp_frame = pad->aggregated_frame;
res = compare_frames (self, ref_frame, cmp_frame, outbuf, msg_structure,
padname);
g_free (padname);
if (!res)
goto failed;
}
}
}
GST_OBJECT_UNLOCK (vagg);
/* We only post the message here, because we can't post it while the object
* is locked.
*/
gst_structure_set (msg_structure, "time", GST_TYPE_CLOCK_TIME,
agg->segment.position, NULL);
gst_element_post_message (GST_ELEMENT (self), m);
return GST_FLOW_OK;
failed:
GST_OBJECT_UNLOCK (vagg);
return GST_FLOW_ERROR;
}
static void
_set_property (GObject * object, guint prop_id, const GValue * value,
GParamSpec * pspec)
{
GstIqa *self = GST_IQA (object);
switch (prop_id) {
case PROP_DO_SSIM:
self->do_dssim = g_value_get_boolean (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
_get_property (GObject * object,
guint prop_id, GValue * value, GParamSpec * pspec)
{
GstIqa *self = GST_IQA (object);
switch (prop_id) {
case PROP_DO_SSIM:
g_value_set_boolean (value, self->do_dssim);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
/* GObject boilerplate */
static void
gst_iqa_class_init (GstIqaClass * klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
GstElementClass *gstelement_class = (GstElementClass *) klass;
GstVideoAggregatorClass *videoaggregator_class =
(GstVideoAggregatorClass *) klass;
videoaggregator_class->aggregate_frames = gst_iqa_aggregate_frames;
gst_element_class_add_pad_template (gstelement_class,
gst_static_pad_template_get (&src_factory));
gst_element_class_add_pad_template (gstelement_class,
gst_static_pad_template_get (&sink_factory));
gobject_class->set_property = _set_property;
gobject_class->get_property = _get_property;
#ifdef HAVE_DSSIM
g_object_class_install_property (gobject_class, PROP_DO_SSIM,
g_param_spec_boolean ("do-dssim", "do-dssim",
"Run structural similarity checks", FALSE, G_PARAM_READWRITE));
#endif
gst_element_class_set_static_metadata (gstelement_class, "Iqa",
"Filter/Analyzer/Video",
"Provides various Image Quality Assessment metrics",
"Mathieu Duponchelle <mathieu.duponchelle@collabora.co.uk>");
}
static void
gst_iqa_init (GstIqa * self)
{
}
static gboolean
plugin_init (GstPlugin * plugin)
{
GST_DEBUG_CATEGORY_INIT (gst_iqa_debug, "iqa", 0, "iqa");
return gst_element_register (plugin, "iqa", GST_RANK_PRIMARY, GST_TYPE_IQA);
}
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
GST_VERSION_MINOR,
iqa,
"Iqa", plugin_init, VERSION, GST_LICENSE, GST_PACKAGE_NAME,
GST_PACKAGE_ORIGIN)