2 Copyright (C) 2012-2020 Carl Hetherington <cth@carlh.net>
4 This file is part of DCP-o-matic.
6 DCP-o-matic is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 DCP-o-matic is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with DCP-o-matic. If not, see <http://www.gnu.org/licenses/>.
21 /** @file test/test.cc
22 * @brief Overall test stuff and useful methods for tests.
25 #include "lib/config.h"
27 #include "lib/signal_manager.h"
29 #include "lib/job_manager.h"
31 #include "lib/cross.h"
32 #include "lib/encode_server_finder.h"
33 #include "lib/ffmpeg_image_proxy.h"
34 #include "lib/image.h"
35 #include "lib/ratio.h"
36 #include "lib/dcp_content_type.h"
37 #include "lib/log_entry.h"
38 #include "lib/compose.hpp"
39 #include "lib/file_log.h"
40 #include "lib/dcpomatic_log.h"
45 #include <dcp/reel_picture_asset.h>
46 #include <dcp/mono_picture_frame.h>
47 #include <dcp/mono_picture_asset.h>
48 #include <dcp/openjpeg_image.h>
49 #include <asdcp/AS_DCP.h>
52 #include <libxml++/libxml++.h>
54 #include <libavformat/avformat.h>
56 #define BOOST_TEST_DYN_LINK
57 #define BOOST_TEST_MODULE dcpomatic_test
58 #include <boost/test/unit_test.hpp>
59 #include <boost/algorithm/string.hpp>
71 using boost::shared_ptr;
72 using boost::scoped_array;
73 using boost::dynamic_pointer_cast;
76 boost::filesystem::path
77 TestPaths::TestPaths::private_data ()
79 char* env = getenv("DCPOMATIC_TEST_PRIVATE");
81 return boost::filesystem::path(env);
84 return boost::filesystem::canonical(boost::filesystem::path ("..") / boost::filesystem::path ("dcpomatic-test-private"));
88 boost::filesystem::path TestPaths::xsd ()
90 return boost::filesystem::canonical(boost::filesystem::path("..") / boost::filesystem::path("libdcp") / boost::filesystem::path("xsd"));
97 Config::instance()->set_master_encoding_threads (boost::thread::hardware_concurrency());
98 Config::instance()->set_server_encoding_threads (1);
99 Config::instance()->set_server_port_base (61921);
100 Config::instance()->set_default_isdcf_metadata (ISDCFMetadata ());
101 Config::instance()->set_default_container (Ratio::from_id ("185"));
102 Config::instance()->set_default_dcp_content_type (static_cast<DCPContentType*> (0));
103 Config::instance()->set_default_audio_delay (0);
104 Config::instance()->set_default_j2k_bandwidth (100000000);
105 Config::instance()->set_default_interop (false);
106 Config::instance()->set_default_still_length (10);
107 Config::instance()->set_log_types (
108 LogEntry::TYPE_GENERAL | LogEntry::TYPE_WARNING | LogEntry::TYPE_ERROR | LogEntry::TYPE_DEBUG_THREED | LogEntry::TYPE_DEBUG_ENCODE | LogEntry::TYPE_DEBUG_PLAYER
110 Config::instance()->set_automatic_audio_analysis (false);
113 class TestSignalManager : public SignalManager
116 /* No wakes in tests: we call ui_idle ourselves */
127 State::override_path = "build/test/state";
128 boost::filesystem::remove_all (*State::override_path);
131 setup_test_config ();
133 EncodeServerFinder::instance()->stop ();
135 signal_manager = new TestSignalManager ();
137 dcpomatic_log.reset (new FileLog("build/test/log"));
146 BOOST_GLOBAL_FIXTURE (TestConfig);
148 boost::filesystem::path
149 test_film_dir (string name)
151 boost::filesystem::path p;
159 new_test_film (string name)
161 boost::filesystem::path p = test_film_dir (name);
162 if (boost::filesystem::exists (p)) {
163 boost::filesystem::remove_all (p);
166 shared_ptr<Film> film = shared_ptr<Film> (new Film (p));
167 film->write_metadata ();
172 new_test_film2 (string name)
174 boost::filesystem::path p = test_film_dir (name);
175 if (boost::filesystem::exists (p)) {
176 boost::filesystem::remove_all (p);
179 shared_ptr<Film> film = shared_ptr<Film> (new Film (p));
180 film->set_dcp_content_type (DCPContentType::from_isdcf_name ("TST"));
181 film->set_container (Ratio::from_id ("185"));
182 film->write_metadata ();
187 check_wav_file (boost::filesystem::path ref, boost::filesystem::path check)
191 SNDFILE* ref_file = sf_open (ref.string().c_str(), SFM_READ, &ref_info);
192 BOOST_CHECK (ref_file);
195 check_info.format = 0;
196 SNDFILE* check_file = sf_open (check.string().c_str(), SFM_READ, &check_info);
197 BOOST_CHECK (check_file);
199 BOOST_CHECK_EQUAL (ref_info.frames, check_info.frames);
200 BOOST_CHECK_EQUAL (ref_info.samplerate, check_info.samplerate);
201 BOOST_CHECK_EQUAL (ref_info.channels, check_info.channels);
202 BOOST_CHECK_EQUAL (ref_info.format, check_info.format);
204 /* buffer_size is in frames */
205 sf_count_t const buffer_size = 65536 * ref_info.channels;
206 scoped_array<int32_t> ref_buffer (new int32_t[buffer_size]);
207 scoped_array<int32_t> check_buffer (new int32_t[buffer_size]);
209 sf_count_t N = ref_info.frames;
211 sf_count_t this_time = min (buffer_size, N);
212 sf_count_t r = sf_readf_int (ref_file, ref_buffer.get(), this_time);
213 BOOST_CHECK_EQUAL (r, this_time);
214 r = sf_readf_int (check_file, check_buffer.get(), this_time);
215 BOOST_CHECK_EQUAL (r, this_time);
217 for (sf_count_t i = 0; i < this_time; ++i) {
218 BOOST_REQUIRE_MESSAGE (
219 abs (ref_buffer[i] - check_buffer[i]) <= 65536,
220 ref << " differs from " << check << " at " << (ref_info.frames - N + i) << " of " << ref_info.frames
221 << "(" << ref_buffer[i] << " vs " << check_buffer[i] << ")"
230 check_mxf_audio_file (boost::filesystem::path ref, boost::filesystem::path check)
232 ASDCP::PCM::MXFReader ref_reader;
233 BOOST_REQUIRE (!ASDCP_FAILURE (ref_reader.OpenRead (ref.string().c_str())));
235 ASDCP::PCM::AudioDescriptor ref_desc;
236 BOOST_REQUIRE (!ASDCP_FAILURE (ref_reader.FillAudioDescriptor (ref_desc)));
238 ASDCP::PCM::MXFReader check_reader;
239 BOOST_REQUIRE (!ASDCP_FAILURE (check_reader.OpenRead (check.string().c_str())));
241 ASDCP::PCM::AudioDescriptor check_desc;
242 BOOST_REQUIRE (!ASDCP_FAILURE (check_reader.FillAudioDescriptor (check_desc)));
244 BOOST_REQUIRE_EQUAL (ref_desc.ContainerDuration, check_desc.ContainerDuration);
246 ASDCP::PCM::FrameBuffer ref_buffer (Kumu::Megabyte);
247 ASDCP::PCM::FrameBuffer check_buffer (Kumu::Megabyte);
248 for (size_t i = 0; i < ref_desc.ContainerDuration; ++i) {
249 ref_reader.ReadFrame (i, ref_buffer, 0);
250 check_reader.ReadFrame (i, check_buffer, 0);
251 BOOST_REQUIRE (memcmp(ref_buffer.RoData(), check_buffer.RoData(), ref_buffer.Size()) == 0);
256 /** @return true if the files are the same, otherwise false */
258 mxf_atmos_files_same (boost::filesystem::path ref, boost::filesystem::path check, bool verbose)
260 ASDCP::ATMOS::MXFReader ref_reader;
261 BOOST_REQUIRE (!ASDCP_FAILURE(ref_reader.OpenRead(ref.string().c_str())));
263 ASDCP::ATMOS::AtmosDescriptor ref_desc;
264 BOOST_REQUIRE (!ASDCP_FAILURE(ref_reader.FillAtmosDescriptor(ref_desc)));
266 ASDCP::ATMOS::MXFReader check_reader;
267 BOOST_REQUIRE (!ASDCP_FAILURE(check_reader.OpenRead(check.string().c_str())));
269 ASDCP::ATMOS::AtmosDescriptor check_desc;
270 BOOST_REQUIRE (!ASDCP_FAILURE(check_reader.FillAtmosDescriptor(check_desc)));
272 if (ref_desc.EditRate.Numerator != check_desc.EditRate.Numerator) {
274 std::cout << "EditRate.Numerator differs.\n";
278 if (ref_desc.EditRate.Denominator != check_desc.EditRate.Denominator) {
280 std::cout << "EditRate.Denominator differs.\n";
284 if (ref_desc.ContainerDuration != check_desc.ContainerDuration) {
286 std::cout << "EditRate.ContainerDuration differs.\n";
290 if (ref_desc.FirstFrame != check_desc.FirstFrame) {
292 std::cout << "EditRate.FirstFrame differs.\n";
296 if (ref_desc.MaxChannelCount != check_desc.MaxChannelCount) {
298 std::cout << "EditRate.MaxChannelCount differs.\n";
302 if (ref_desc.MaxObjectCount != check_desc.MaxObjectCount) {
304 std::cout << "EditRate.MaxObjectCount differs.\n";
308 if (ref_desc.AtmosVersion != check_desc.AtmosVersion) {
310 std::cout << "EditRate.AtmosVersion differs.\n";
315 ASDCP::DCData::FrameBuffer ref_buffer (Kumu::Megabyte);
316 ASDCP::DCData::FrameBuffer check_buffer (Kumu::Megabyte);
317 for (size_t i = 0; i < ref_desc.ContainerDuration; ++i) {
318 ref_reader.ReadFrame (i, ref_buffer, 0);
319 check_reader.ReadFrame (i, check_buffer, 0);
320 if (memcmp(ref_buffer.RoData(), check_buffer.RoData(), ref_buffer.Size())) {
322 std::cout << "data differs.\n";
334 rms_error (boost::filesystem::path ref, boost::filesystem::path check)
336 FFmpegImageProxy ref_proxy (ref);
337 shared_ptr<Image> ref_image = ref_proxy.image().image;
338 FFmpegImageProxy check_proxy (check);
339 shared_ptr<Image> check_image = check_proxy.image().image;
341 BOOST_REQUIRE_EQUAL (ref_image->pixel_format(), check_image->pixel_format());
342 AVPixelFormat const format = ref_image->pixel_format();
344 BOOST_REQUIRE (ref_image->size() == check_image->size());
345 int const width = ref_image->size().width;
346 int const height = ref_image->size().height;
348 double sum_square = 0;
350 case AV_PIX_FMT_RGBA:
352 for (int y = 0; y < height; ++y) {
353 uint8_t* p = ref_image->data()[0] + y * ref_image->stride()[0];
354 uint8_t* q = check_image->data()[0] + y * check_image->stride()[0];
355 for (int x = 0; x < width; ++x) {
356 for (int c = 0; c < 4; ++c) {
357 sum_square += pow((*p++ - *q++), 2);
363 case AV_PIX_FMT_RGB24:
365 for (int y = 0; y < height; ++y) {
366 uint8_t* p = ref_image->data()[0] + y * ref_image->stride()[0];
367 uint8_t* q = check_image->data()[0] + y * check_image->stride()[0];
368 for (int x = 0; x < width; ++x) {
369 for (int c = 0; c < 3; ++c) {
370 sum_square += pow((*p++ - *q++), 2);
376 case AV_PIX_FMT_RGB48BE:
378 for (int y = 0; y < height; ++y) {
379 uint16_t* p = reinterpret_cast<uint16_t*>(ref_image->data()[0] + y * ref_image->stride()[0]);
380 uint16_t* q = reinterpret_cast<uint16_t*>(check_image->data()[0] + y * check_image->stride()[0]);
381 for (int x = 0; x < width; ++x) {
382 for (int c = 0; c < 3; ++c) {
383 sum_square += pow((*p++ - *q++), 2);
390 BOOST_REQUIRE_MESSAGE (false, "unrecognised pixel format " << format);
393 return sqrt(sum_square / (height * width));
397 BOOST_AUTO_TEST_CASE (rms_error_test)
399 BOOST_CHECK_CLOSE (rms_error("test/data/check_image0.png", "test/data/check_image0.png"), 0, 0.001);
400 BOOST_CHECK_CLOSE (rms_error("test/data/check_image0.png", "test/data/check_image1.png"), 2.2778, 0.001);
401 BOOST_CHECK_CLOSE (rms_error("test/data/check_image0.png", "test/data/check_image2.png"), 59.8896, 0.001);
402 BOOST_CHECK_CLOSE (rms_error("test/data/check_image0.png", "test/data/check_image3.png"), 0.89164, 0.001);
407 check_image (boost::filesystem::path ref, boost::filesystem::path check, double threshold)
409 double const e = rms_error (ref, check);
410 BOOST_CHECK_MESSAGE (e < threshold, ref << " differs from " << check << " " << e);
415 check_file (boost::filesystem::path ref, boost::filesystem::path check)
417 uintmax_t N = boost::filesystem::file_size (ref);
418 BOOST_CHECK_EQUAL (N, boost::filesystem::file_size (check));
419 FILE* ref_file = fopen_boost (ref, "rb");
420 BOOST_CHECK (ref_file);
421 FILE* check_file = fopen_boost (check, "rb");
422 BOOST_CHECK (check_file);
424 int const buffer_size = 65536;
425 uint8_t* ref_buffer = new uint8_t[buffer_size];
426 uint8_t* check_buffer = new uint8_t[buffer_size];
428 string error = "File " + check.string() + " differs from reference " + ref.string();
431 uintmax_t this_time = min (uintmax_t (buffer_size), N);
432 size_t r = fread (ref_buffer, 1, this_time, ref_file);
433 BOOST_CHECK_EQUAL (r, this_time);
434 r = fread (check_buffer, 1, this_time, check_file);
435 BOOST_CHECK_EQUAL (r, this_time);
437 BOOST_CHECK_MESSAGE (memcmp (ref_buffer, check_buffer, this_time) == 0, error);
438 if (memcmp (ref_buffer, check_buffer, this_time)) {
446 delete[] check_buffer;
453 note (dcp::NoteType t, string n)
455 if (t == dcp::DCP_ERROR) {
462 check_dcp (boost::filesystem::path ref, shared_ptr<const Film> film)
464 check_dcp (ref, film->dir(film->dcp_name()));
469 check_dcp (boost::filesystem::path ref, boost::filesystem::path check)
471 dcp::DCP ref_dcp (ref);
473 dcp::DCP check_dcp (check);
476 dcp::EqualityOptions options;
477 options.max_mean_pixel_error = 5;
478 options.max_std_dev_pixel_error = 5;
479 options.max_audio_sample_error = 255;
480 options.cpl_annotation_texts_can_differ = true;
481 options.reel_annotation_texts_can_differ = true;
482 options.reel_hashes_can_differ = true;
483 options.issue_dates_can_differ = true;
485 BOOST_CHECK (ref_dcp.equals (check_dcp, options, boost::bind (note, _1, _2)));
489 check_xml (xmlpp::Element* ref, xmlpp::Element* test, list<string> ignore)
491 BOOST_CHECK_EQUAL (ref->get_name (), test->get_name ());
492 BOOST_CHECK_EQUAL (ref->get_namespace_prefix (), test->get_namespace_prefix ());
494 if (find (ignore.begin(), ignore.end(), ref->get_name()) != ignore.end ()) {
498 xmlpp::Element::NodeList ref_children = ref->get_children ();
499 xmlpp::Element::NodeList test_children = test->get_children ();
500 BOOST_REQUIRE_MESSAGE (
501 ref_children.size() == test_children.size(),
502 ref->get_name() << " has " << ref_children.size() << " or " << test_children.size() << " children"
505 xmlpp::Element::NodeList::iterator k = ref_children.begin ();
506 xmlpp::Element::NodeList::iterator l = test_children.begin ();
507 while (k != ref_children.end ()) {
509 /* XXX: should be doing xmlpp::EntityReference, xmlpp::XIncludeEnd, xmlpp::XIncludeStart */
511 xmlpp::Element* ref_el = dynamic_cast<xmlpp::Element*> (*k);
512 xmlpp::Element* test_el = dynamic_cast<xmlpp::Element*> (*l);
513 BOOST_CHECK ((ref_el && test_el) || (!ref_el && !test_el));
514 if (ref_el && test_el) {
515 check_xml (ref_el, test_el, ignore);
518 xmlpp::ContentNode* ref_cn = dynamic_cast<xmlpp::ContentNode*> (*k);
519 xmlpp::ContentNode* test_cn = dynamic_cast<xmlpp::ContentNode*> (*l);
520 BOOST_CHECK ((ref_cn && test_cn) || (!ref_cn && !test_cn));
521 if (ref_cn && test_cn) {
522 BOOST_CHECK_EQUAL (ref_cn->get_content(), test_cn->get_content ());
529 xmlpp::Element::AttributeList ref_attributes = ref->get_attributes ();
530 xmlpp::Element::AttributeList test_attributes = test->get_attributes ();
531 BOOST_CHECK_EQUAL (ref_attributes.size(), test_attributes.size ());
533 xmlpp::Element::AttributeList::const_iterator m = ref_attributes.begin();
534 xmlpp::Element::AttributeList::const_iterator n = test_attributes.begin();
535 while (m != ref_attributes.end ()) {
536 BOOST_CHECK_EQUAL ((*m)->get_name(), (*n)->get_name());
537 BOOST_CHECK_EQUAL ((*m)->get_value(), (*n)->get_value());
545 check_xml (boost::filesystem::path ref, boost::filesystem::path test, list<string> ignore)
547 xmlpp::DomParser* ref_parser = new xmlpp::DomParser (ref.string ());
548 xmlpp::Element* ref_root = ref_parser->get_document()->get_root_node ();
549 xmlpp::DomParser* test_parser = new xmlpp::DomParser (test.string ());
550 xmlpp::Element* test_root = test_parser->get_document()->get_root_node ();
552 check_xml (ref_root, test_root, ignore);
558 JobManager* jm = JobManager::instance ();
559 while (jm->work_to_do ()) {
560 while (signal_manager->ui_idle ()) {}
561 dcpomatic_sleep_seconds (1);
566 for (list<shared_ptr<Job> >::iterator i = jm->_jobs.begin(); i != jm->_jobs.end(); ++i) {
567 if ((*i)->finished_in_error ()) {
571 cerr << N << " errors.\n";
573 for (list<shared_ptr<Job> >::iterator i = jm->_jobs.begin(); i != jm->_jobs.end(); ++i) {
574 if ((*i)->finished_in_error ()) {
575 cerr << (*i)->name() << ":\n"
576 << "\tsummary: " << (*i)->error_summary () << "\n"
577 << "\tdetails: " << (*i)->error_details () << "\n";
582 while (signal_manager->ui_idle ()) {}
612 png_write_data (png_structp png_ptr, png_bytep data, png_size_t length)
614 Memory* mem = reinterpret_cast<Memory*>(png_get_io_ptr(png_ptr));
615 size_t size = mem->size + length;
618 mem->data = reinterpret_cast<uint8_t*>(realloc(mem->data, size));
620 mem->data = reinterpret_cast<uint8_t*>(malloc(size));
623 BOOST_REQUIRE (mem->data);
625 memcpy (mem->data + mem->size, data, length);
631 png_flush (png_structp)
638 png_error_fn (png_structp png_ptr, char const * message)
640 reinterpret_cast<Image*>(png_get_error_ptr(png_ptr))->png_error (message);
645 write_image (shared_ptr<const Image> image, boost::filesystem::path file)
647 int png_color_type = 0;
648 int bits_per_pixel = 0;
649 switch (image->pixel_format()) {
650 case AV_PIX_FMT_RGB24:
651 png_color_type = PNG_COLOR_TYPE_RGB;
654 case AV_PIX_FMT_XYZ12LE:
655 png_color_type = PNG_COLOR_TYPE_RGB;
659 BOOST_REQUIRE_MESSAGE (false, "unexpected pixel format " << image->pixel_format());
662 /* error handling? */
663 png_structp png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, reinterpret_cast<void*>(const_cast<Image*>(image.get())), png_error_fn, 0);
664 BOOST_REQUIRE (png_ptr);
668 png_set_write_fn (png_ptr, &state, png_write_data, png_flush);
670 png_infop info_ptr = png_create_info_struct(png_ptr);
671 BOOST_REQUIRE (info_ptr);
673 png_set_IHDR (png_ptr, info_ptr, image->size().width, image->size().height, bits_per_pixel, png_color_type, PNG_INTERLACE_NONE, PNG_COMPRESSION_TYPE_DEFAULT, PNG_FILTER_TYPE_DEFAULT);
675 png_byte ** row_pointers = reinterpret_cast<png_byte **>(png_malloc(png_ptr, image->size().height * sizeof(png_byte *)));
676 for (int i = 0; i < image->size().height; ++i) {
677 row_pointers[i] = (png_byte *) (image->data()[0] + i * image->stride()[0]);
680 png_write_info (png_ptr, info_ptr);
681 png_write_image (png_ptr, row_pointers);
682 png_write_end (png_ptr, info_ptr);
684 png_destroy_write_struct (&png_ptr, &info_ptr);
685 png_free (png_ptr, row_pointers);
687 dcp::Data(state.data, state.size).write(file);
692 check_ffmpeg (boost::filesystem::path ref, boost::filesystem::path check, int audio_tolerance)
694 int const r = system (String::compose("ffcmp -t %1 %2 %3", audio_tolerance, ref.string(), check.string()).c_str());
695 BOOST_REQUIRE_EQUAL (WEXITSTATUS(r), 0);
699 check_one_frame (boost::filesystem::path dcp_dir, int64_t index, boost::filesystem::path ref)
701 dcp::DCP dcp (dcp_dir);
703 shared_ptr<dcp::MonoPictureAsset> asset = dynamic_pointer_cast<dcp::MonoPictureAsset> (dcp.cpls().front()->reels().front()->main_picture()->asset());
704 BOOST_REQUIRE (asset);
705 shared_ptr<const dcp::MonoPictureFrame> frame = asset->start_read()->get_frame(index);
706 shared_ptr<const dcp::MonoPictureFrame> ref_frame (new dcp::MonoPictureFrame (ref));
708 shared_ptr<dcp::OpenJPEGImage> image = frame->xyz_image ();
709 shared_ptr<dcp::OpenJPEGImage> ref_image = ref_frame->xyz_image ();
711 BOOST_REQUIRE (image->size() == ref_image->size());
714 for (int y = 0; y < ref_image->size().height; ++y) {
715 for (int x = 0; x < ref_image->size().width; ++x) {
716 BOOST_REQUIRE_EQUAL (ref_image->data(0)[off], image->data(0)[off]);
717 BOOST_REQUIRE_EQUAL (ref_image->data(1)[off], image->data(1)[off]);
718 BOOST_REQUIRE_EQUAL (ref_image->data(2)[off], image->data(2)[off]);
724 boost::filesystem::path
725 dcp_file (shared_ptr<const Film> film, string prefix)
727 boost::filesystem::directory_iterator i = boost::filesystem::directory_iterator (film->dir(film->dcp_name()));
728 while (i != boost::filesystem::directory_iterator() && !boost::algorithm::starts_with (i->path().leaf().string(), prefix)) {
732 BOOST_REQUIRE (i != boost::filesystem::directory_iterator());
736 boost::filesystem::path
737 subtitle_file (shared_ptr<Film> film)
740 boost::filesystem::directory_iterator i = boost::filesystem::directory_iterator (film->directory().get() / film->dcp_name (false));
741 i != boost::filesystem::directory_iterator ();
744 if (boost::filesystem::is_directory (i->path ())) {
746 boost::filesystem::directory_iterator j = boost::filesystem::directory_iterator (i->path ());
747 j != boost::filesystem::directory_iterator ();
750 if (boost::algorithm::starts_with (j->path().leaf().string(), "sub_")) {
757 BOOST_REQUIRE (false);
759 return boost::filesystem::path("/");
763 make_random_file (boost::filesystem::path path, size_t size)
765 FILE* t = fopen_boost(path, "wb");
767 for (size_t i = 0; i < size; ++i) {
768 uint8_t r = rand() & 0xff;
769 fwrite (&r, 1, 1, t);
775 LogSwitcher::LogSwitcher (shared_ptr<Log> log)
776 : _old (dcpomatic_log)
782 LogSwitcher::~LogSwitcher ()
784 dcpomatic_log = _old;