Move benchmark out of test/ into benchmark/

[libdcp.git] / benchmark / j2k_transcode.cc

diff --git a/benchmark/j2k_transcode.cc b/benchmark/j2k_transcode.cc
new file mode 100644 (file)
index 0000000..1a814b6
--- /dev/null
+++ b/benchmark/j2k_transcode.cc
@@ -0,0 +1,114 @@
+/*
+    Copyright (C) 2015-2019 Carl Hetherington <cth@carlh.net>
+
+    This file is part of libdcp.
+
+    libdcp 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.
+
+    libdcp 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 libdcp.  If not, see <http://www.gnu.org/licenses/>.
+
+    In addition, as a special exception, the copyright holders give
+    permission to link the code of portions of this program with the
+    OpenSSL library under certain conditions as described in each
+    individual source file, and distribute linked combinations
+    including the two.
+
+    You must obey the GNU General Public License in all respects
+    for all of the code used other than OpenSSL.  If you modify
+    file(s) with this exception, you may extend this exception to your
+    version of the file(s), but you are not obligated to do so.  If you
+    do not wish to do so, delete this exception statement from your
+    version.  If you delete this exception statement from all source
+    files in the program, then also delete it here.
+*/
+
+#include "data.h"
+#include "util.h"
+#include "version.h"
+#include "j2k.h"
+#include "openjpeg_image.h"
+#include <sys/time.h>
+#include <iostream>
+#include <cstdio>
+
+using std::cout;
+using std::cerr;
+using boost::shared_ptr;
+
+class Timer
+{
+public:
+       Timer ()
+               : _total (0)
+       {
+
+       }
+
+       void start ()
+       {
+               gettimeofday (&_start, 0);
+       }
+
+       void stop ()
+       {
+               struct timeval stop;
+               gettimeofday (&stop, 0);
+               _total += (stop.tv_sec + stop.tv_usec / 1e6) - (_start.tv_sec + _start.tv_usec / 1e6);
+       }
+
+       double get ()
+       {
+               return _total;
+       }
+
+private:
+       double _total;
+       struct timeval _start;
+};
+
+/** Run some basic benchmarks of JPEG2000 encoding / decoding */
+int
+main (int argc, char* argv[])
+{
+       if (argc < 2) {
+               cerr << "Syntax: " << argv[0] << " private-test-path\n";
+               exit (EXIT_FAILURE);
+       }
+
+       int const count = 100;
+       int const j2k_bandwidth = 100000000;
+
+       dcp::Data j2k (boost::filesystem::path (argv[1]) / "thx.j2c");
+
+       Timer decompress;
+       Timer compress;
+
+       dcp::Data recomp;
+       for (int i = 0; i < count; ++i) {
+               decompress.start ();
+               shared_ptr<dcp::OpenJPEGImage> xyz = dcp::decompress_j2k (j2k, 0);
+               decompress.stop ();
+               compress.start ();
+               recomp = dcp::compress_j2k (xyz, j2k_bandwidth, 24, false, false);
+               compress.stop ();
+               cout << (i + 1) << " ";
+               cout.flush ();
+       }
+       cout << "\n";
+
+       cout << "Decompress: " << count / decompress.get() << " fps.\n";
+       cout << "Compress:   " << count / compress.get() << " fps.\n";
+
+       FILE* f = fopen ("check.j2c", "wb");
+       fwrite (recomp.data().get(), 1, recomp.size(), f);
+       fclose (f);
+}