From: Carl Hetherington <cth@carlh.net>
Date: Wed, 28 Oct 2020 15:25:32 +0000 (+0100)
Subject: Add a simple benchmark for scaling images.
X-Git-Url: https://main.carlh.net/gitweb/?a=commitdiff_plain;ds=sidebyside;h=b02d241e59daae86bf41a5598c3c77e9ccc0f67a;p=dcpomatic.git

Add a simple benchmark for scaling images.
---

diff --git a/benchmark/scaling.cc b/benchmark/scaling.cc
new file mode 100644
index 000000000..93ab7869b
--- /dev/null
+++ b/benchmark/scaling.cc
@@ -0,0 +1,82 @@
+/*
+    Copyright (C) 2020 Carl Hetherington <cth@carlh.net>
+
+    This file is part of DCP-o-matic.
+
+    DCP-o-matic is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    DCP-o-matic 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 General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with DCP-o-matic.  If not, see <http://www.gnu.org/licenses/>.
+
+*/
+
+
+#include "lib/compose.hpp"
+#include "lib/image.h"
+#include "lib/timer.h"
+
+
+using boost::shared_ptr;
+
+
+#define ITERATIONS 500
+
+
+static
+shared_ptr<Image>
+dummy_image(dcp::Size size)
+{
+	shared_ptr<Image> image(new Image(AV_PIX_FMT_RGB24, size, true));
+	int v = 0;
+	for (int y = 0; y < size.height; ++y) {
+		for (int c = 0; c < image->planes(); ++c) {
+			uint8_t* p = image->data()[c] + y * image->stride()[c];
+			int const line_size = image->line_size()[c];
+			for (int x = 0; x < line_size; ++x) {
+				*p++ = v++ % 256;
+			}
+		}
+	}
+
+	return image;
+}
+
+
+static
+void
+test (dcp::Size from, dcp::Size to, bool fast)
+{
+	shared_ptr<Image> image = dummy_image(from);
+	PeriodTimer pt (String::compose("%1:%2 -> %3:%4 %5", from.width, from.height, to.width, to.height, fast ? "fast" : "slow"));
+	for (int i = 0; i < ITERATIONS; ++i) {
+		image->scale (to, dcp::YUV_TO_RGB_REC709, AV_PIX_FMT_RGB48, true, fast);
+	}
+}
+
+
+int
+main ()
+{
+	test (dcp::Size(1998, 1080), dcp::Size(1998, 1080), true);
+	test (dcp::Size(1998, 1080), dcp::Size(1998, 1080), false);
+
+	test (dcp::Size(1998, 1080), dcp::Size(2006, 1088), true);
+	test (dcp::Size(1998, 1080), dcp::Size(2006, 1088), false);
+
+	test (dcp::Size(996, 540), dcp::Size(1998, 1080), true);
+	test (dcp::Size(996, 540), dcp::Size(1998, 1080), false);
+
+	test (dcp::Size(498, 270), dcp::Size(1998, 1080), true);
+	test (dcp::Size(498, 270), dcp::Size(1998, 1080), false);
+
+	return 0;
+}
+
diff --git a/benchmark/wscript b/benchmark/wscript
new file mode 100644
index 000000000..4ca3dff2d
--- /dev/null
+++ b/benchmark/wscript
@@ -0,0 +1,27 @@
+#
+#    Copyright (C) 2020 Carl Hetherington <cth@carlh.net>
+#
+#    This file is part of DCP-o-matic.
+#
+#    DCP-o-matic is free software; you can redistribute it and/or modify
+#    it under the terms of the GNU General Public License as published by
+#    the Free Software Foundation; either version 2 of the License, or
+#    (at your option) any later version.
+#
+#    DCP-o-matic 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 General Public License for more details.
+#
+#    You should have received a copy of the GNU General Public License
+#    along with DCP-o-matic.  If not, see <http://www.gnu.org/licenses/>.
+#
+
+def build(bld):
+    for p in ['scaling']:
+        obj = bld(features='cxx cxxprogram')
+        obj.name = p
+        obj.uselib = "DCP"
+        obj.use = 'libdcpomatic2'
+        obj.source = p + ".cc"
+        obj.target = p
diff --git a/run/benchmark b/run/benchmark
new file mode 100755
index 000000000..1106e183e
--- /dev/null
+++ b/run/benchmark
@@ -0,0 +1,31 @@
+#!/bin/bash
+#
+# run/benchmark <name>
+
+executable=build/benchmark/$1
+
+if [ "$1" == "--debug" ]; then
+    shift;
+    gdb --args $executable --catch_system_errors=no --log_level=test_suite 
+elif [ "$1" == "--backtrace" ]; then
+    shift;
+    gdb -batch -ex "run" -ex "thread apply all bt" -return-child-result --args $executable --catch_system_errors=yes 
+elif [ "$1" == "--valgrind" ]; then
+    shift;
+    valgrind --tool="memcheck" --suppressions=suppressions $executable 
+elif [ "$1" == "--callgrind" ]; then
+    shift;
+    valgrind --tool="callgrind" $executable 
+elif [ "$1" == "--quiet" ]; then
+    shift;
+    $executable --catch_system_errors=no 
+elif [ "$1" == "--drd" ]; then
+    shift;
+    valgrind --tool="drd" $executable 
+elif [ "$1" == "--helgrind" ]; then
+    shift;
+    valgrind --tool="helgrind" $executable 
+else
+    ulimit -c unlimited
+    $executable --catch_system_errors=no --log_level=test_suite
+fi
diff --git a/wscript b/wscript
index 00665bbac..16a778034 100644
--- a/wscript
+++ b/wscript
@@ -631,6 +631,7 @@ def build(bld):
 
     bld.recurse('src')
     bld.recurse('graphics')
+    bld.recurse('benchmark')
 
     if not bld.env.DISABLE_TESTS:
         bld.recurse('test')