2 Copyright (C) 2012-2021 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 src/lib/util.cc
22 * @brief Some utility functions and classes.
26 #include "exceptions.h"
27 #include "dcp_content_type.h"
29 #include "cinema_sound_processor.h"
34 #include "video_content.h"
37 #include "audio_processor.h"
39 #include "compose.hpp"
40 #include "audio_buffers.h"
41 #include "string_text.h"
43 #include "render_text.h"
44 #include "ffmpeg_image_proxy.h"
46 #include "text_decoder.h"
47 #include "job_manager.h"
49 #include <dcp/decrypted_kdm.h>
50 #include <dcp/locale_convert.h>
52 #include <dcp/raw_convert.h>
53 #include <dcp/picture_asset.h>
54 #include <dcp/sound_asset.h>
55 #include <dcp/subtitle_asset.h>
56 #include <dcp/atmos_asset.h>
58 #include <libavfilter/avfilter.h>
59 #include <libavformat/avformat.h>
60 #include <libavcodec/avcodec.h>
62 #include <curl/curl.h>
64 #include <pangomm/init.h>
65 #include <unicode/utypes.h>
66 #include <unicode/unistr.h>
67 #include <unicode/translit.h>
68 #include <boost/algorithm/string.hpp>
69 #include <boost/range/algorithm/replace_if.hpp>
70 #include <boost/thread.hpp>
71 #include <boost/filesystem.hpp>
72 DCPOMATIC_DISABLE_WARNINGS
73 #include <boost/locale.hpp>
74 DCPOMATIC_ENABLE_WARNINGS
75 #ifdef DCPOMATIC_WINDOWS
76 #include <boost/locale.hpp>
85 #ifdef DCPOMATIC_POSIX
106 using std::bad_alloc;
107 using std::set_terminate;
108 using std::make_pair;
109 using std::shared_ptr;
110 using std::make_shared;
112 using boost::optional;
113 using boost::lexical_cast;
114 using boost::bad_lexical_cast;
115 using boost::scoped_array;
117 using dcp::raw_convert;
118 using dcp::locale_convert;
119 using namespace dcpomatic;
121 /** Path to our executable, required by the stacktrace stuff and filled
122 * in during App::onInit().
125 bool is_batch_converter = false;
126 static boost::thread::id ui_thread;
127 static boost::filesystem::path backtrace_file;
129 /** Convert some number of seconds to a string representation
130 * in hours, minutes and seconds.
133 * @return String of the form H:M:S (where H is hours, M
134 * is minutes and S is seconds).
137 seconds_to_hms (int s)
145 snprintf (buffer, sizeof(buffer), "%d:%02d:%02d", h, m, s);
150 time_to_hmsf (DCPTime time, Frame rate)
152 Frame f = time.frames_round (rate);
161 snprintf (buffer, sizeof(buffer), "%d:%02d:%02d.%d", h, m, s, static_cast<int>(f));
165 /** @param s Number of seconds.
166 * @return String containing an approximate description of s (e.g. "about 2 hours")
169 seconds_to_approximate_hms (int s)
179 bool minutes = h < 6 && m > 0;
180 bool seconds = h == 0 && m < 10 && s > 0;
182 if (m > 30 && !minutes) {
183 /* round up the hours */
186 if (s > 30 && !seconds) {
187 /* round up the minutes */
197 /// TRANSLATORS: h here is an abbreviation for hours
198 ap += locale_convert<string>(h) + _("h");
200 if (minutes || seconds) {
206 /// TRANSLATORS: m here is an abbreviation for minutes
207 ap += locale_convert<string>(m) + _("m");
216 /// TRANSLATORS: s here is an abbreviation for seconds
217 ap += locale_convert<string>(s) + _("s");
224 seconds (struct timeval t)
226 return t.tv_sec + (double (t.tv_usec) / 1e6);
229 #ifdef DCPOMATIC_WINDOWS
231 /** Resolve symbol name and source location given the path to the executable */
233 addr2line (void const * const addr)
235 char addr2line_cmd[512] = { 0 };
236 sprintf (addr2line_cmd, "addr2line -f -p -e %.256s %p > %s", program_name.c_str(), addr, backtrace_file.string().c_str());
237 return system(addr2line_cmd);
240 DCPOMATIC_DISABLE_WARNINGS
241 /** This is called when C signals occur on Windows (e.g. SIGSEGV)
242 * (NOT C++ exceptions!). We write a backtrace to backtrace_file by dark means.
243 * Adapted from code here: http://spin.atomicobject.com/2013/01/13/exceptions-stack-traces-c/
246 exception_handler(struct _EXCEPTION_POINTERS * info)
248 auto f = fopen_boost (backtrace_file, "w");
249 fprintf (f, "C-style exception %d\n", info->ExceptionRecord->ExceptionCode);
252 if (info->ExceptionRecord->ExceptionCode != EXCEPTION_STACK_OVERFLOW) {
253 CONTEXT* context = info->ContextRecord;
254 SymInitialize (GetCurrentProcess (), 0, true);
256 STACKFRAME frame = { 0 };
258 /* setup initial stack frame */
260 frame.AddrPC.Offset = context->Rip;
261 frame.AddrStack.Offset = context->Rsp;
262 frame.AddrFrame.Offset = context->Rbp;
264 frame.AddrPC.Offset = context->Eip;
265 frame.AddrStack.Offset = context->Esp;
266 frame.AddrFrame.Offset = context->Ebp;
268 frame.AddrPC.Mode = AddrModeFlat;
269 frame.AddrStack.Mode = AddrModeFlat;
270 frame.AddrFrame.Mode = AddrModeFlat;
274 IMAGE_FILE_MACHINE_I386,
275 GetCurrentProcess (),
280 SymFunctionTableAccess,
285 addr2line((void *) frame.AddrPC.Offset);
289 addr2line ((void *) info->ContextRecord->Rip);
291 addr2line ((void *) info->ContextRecord->Eip);
295 return EXCEPTION_CONTINUE_SEARCH;
297 DCPOMATIC_ENABLE_WARNINGS
301 set_backtrace_file (boost::filesystem::path p)
306 /** This is called when there is an unhandled exception. Any
307 * backtrace in this function is useless on Windows as the stack has
308 * already been unwound from the throw; we have the gdb wrap hack to
315 static bool tried_throw = false;
316 // try once to re-throw currently active exception
322 catch (const std::exception &e) {
323 std::cerr << __FUNCTION__ << " caught unhandled exception. what(): "
324 << e.what() << std::endl;
327 std::cerr << __FUNCTION__ << " caught unknown/unhandled exception."
335 dcpomatic_setup_path_encoding ()
337 #ifdef DCPOMATIC_WINDOWS
338 /* Dark voodoo which, I think, gets boost::filesystem::path to
339 correctly convert UTF-8 strings to paths, and also paths
340 back to UTF-8 strings (on path::string()).
342 After this, constructing boost::filesystem::paths from strings
343 converts from UTF-8 to UTF-16 inside the path. Then
344 path::string().c_str() gives UTF-8 and
345 path::c_str() gives UTF-16.
347 This is all Windows-only. AFAICT Linux/OS X use UTF-8 everywhere,
348 so things are much simpler.
350 std::locale::global (boost::locale::generator().generate (""));
351 boost::filesystem::path::imbue (std::locale ());
355 /** Call the required functions to set up DCP-o-matic's static arrays, etc.
356 * Must be called from the UI thread, if there is one.
361 #ifdef DCPOMATIC_WINDOWS
362 boost::filesystem::path p = g_get_user_config_dir ();
363 p /= "backtrace.txt";
364 set_backtrace_file (p);
365 SetUnhandledExceptionFilter(exception_handler);
368 DCPOMATIC_DISABLE_WARNINGS
370 avfilter_register_all ();
371 DCPOMATIC_ENABLE_WARNINGS
374 /* Add our library directory to the libltdl search path so that
375 xmlsec can find xmlsec1-openssl.
377 auto lib = directory_containing_executable().parent_path();
379 setenv ("LTDL_LIBRARY_PATH", lib.c_str (), 1);
382 set_terminate (terminate);
384 #ifdef DCPOMATIC_WINDOWS
385 putenv ("PANGOCAIRO_BACKEND=fontconfig");
386 putenv (String::compose("FONTCONFIG_PATH=%1", resources_path().string()).c_str());
390 setenv ("PANGOCAIRO_BACKEND", "fontconfig", 1);
391 setenv ("FONTCONFIG_PATH", resources_path().string().c_str(), 1);
395 dcp::init (tags_path());
397 #if defined(DCPOMATIC_WINDOWS) || defined(DCPOMATIC_OSX)
398 /* Render something to fontconfig to create its cache */
399 list<StringText> subs;
400 dcp::SubtitleString ss(
401 optional<string>(), false, false, false, dcp::Colour(), 42, 1, dcp::Time(), dcp::Time(), 0, dcp::HAlign::CENTER, 0, dcp::VAlign::CENTER, dcp::Direction::LTR,
402 "Hello dolly", dcp::Effect::NONE, dcp::Colour(), dcp::Time(), dcp::Time()
404 subs.push_back (StringText(ss, 0));
405 render_text (subs, list<shared_ptr<Font>>(), dcp::Size(640, 480), DCPTime(), 24);
408 Ratio::setup_ratios ();
409 PresetColourConversion::setup_colour_conversion_presets ();
410 DCPContentType::setup_dcp_content_types ();
411 Filter::setup_filters ();
412 CinemaSoundProcessor::setup_cinema_sound_processors ();
413 AudioProcessor::setup_audio_processors ();
415 curl_global_init (CURL_GLOBAL_ALL);
417 ui_thread = boost::this_thread::get_id ();
420 #ifdef DCPOMATIC_WINDOWS
421 boost::filesystem::path
425 GetModuleFileName (0, buffer, 512 * sizeof(wchar_t));
426 boost::filesystem::path p (buffer);
427 p = p.parent_path ();
428 p = p.parent_path ();
435 boost::filesystem::path
438 return "DCP-o-matic 2.app/Contents/Resources";
443 dcpomatic_setup_gettext_i18n (string lang)
445 #ifdef DCPOMATIC_LINUX
449 if (!lang.empty ()) {
450 /* Override our environment language. Note that the caller must not
451 free the string passed into putenv().
453 string s = String::compose ("LANGUAGE=%1", lang);
454 putenv (strdup (s.c_str ()));
455 s = String::compose ("LANG=%1", lang);
456 putenv (strdup (s.c_str ()));
457 s = String::compose ("LC_ALL=%1", lang);
458 putenv (strdup (s.c_str ()));
461 setlocale (LC_ALL, "");
462 textdomain ("libdcpomatic2");
464 #if defined(DCPOMATIC_WINDOWS) || defined(DCPOMATIC_OSX)
465 bindtextdomain ("libdcpomatic2", mo_path().string().c_str());
466 bind_textdomain_codeset ("libdcpomatic2", "UTF8");
469 #ifdef DCPOMATIC_LINUX
470 bindtextdomain ("libdcpomatic2", LINUX_LOCALE_PREFIX);
474 /** Compute a digest of the first and last `size' bytes of a set of files. */
476 digest_head_tail (vector<boost::filesystem::path> files, boost::uintmax_t size)
478 boost::scoped_array<char> buffer (new char[size]);
482 boost::uintmax_t to_do = size;
483 char* p = buffer.get ();
485 while (i < int64_t (files.size()) && to_do > 0) {
486 auto f = fopen_boost (files[i], "rb");
488 throw OpenFileError (files[i].string(), errno, OpenFileError::READ);
491 boost::uintmax_t this_time = min (to_do, boost::filesystem::file_size (files[i]));
492 checked_fread (p, this_time, f, files[i]);
499 digester.add (buffer.get(), size - to_do);
504 i = files.size() - 1;
505 while (i >= 0 && to_do > 0) {
506 auto f = fopen_boost (files[i], "rb");
508 throw OpenFileError (files[i].string(), errno, OpenFileError::READ);
511 boost::uintmax_t this_time = min (to_do, boost::filesystem::file_size (files[i]));
512 dcpomatic_fseek (f, -this_time, SEEK_END);
513 checked_fread (p, this_time, f, files[i]);
520 digester.add (buffer.get(), size - to_do);
522 return digester.get ();
525 /** Round a number up to the nearest multiple of another number.
527 * @param stride Array of numbers to round, indexed by c.
528 * @param t Multiple to round to.
529 * @return Rounded number.
532 stride_round_up (int c, int const * stride, int t)
534 int const a = stride[c] + (t - 1);
538 /** Trip an assert if the caller is not in the UI thread */
542 DCPOMATIC_ASSERT (boost::this_thread::get_id() == ui_thread);
546 audio_channel_name (int c)
548 DCPOMATIC_ASSERT (MAX_DCP_AUDIO_CHANNELS == 16);
550 /// TRANSLATORS: these are the names of audio channels; Lfe (sub) is the low-frequency
551 /// enhancement channel (sub-woofer).
552 string const channels[] = {
559 _("Hearing impaired"),
560 _("Visually impaired"),
563 _("Left rear surround"),
564 _("Right rear surround"),
566 _("D-BOX secondary"),
575 short_audio_channel_name (int c)
577 DCPOMATIC_ASSERT (MAX_DCP_AUDIO_CHANNELS == 16);
579 /// TRANSLATORS: these are short names of audio channels; Lfe is the low-frequency
580 /// enhancement channel (sub-woofer). HI is the hearing-impaired audio track and
581 /// VI is the visually-impaired audio track (audio describe). DBP is the D-BOX
582 /// primary channel and DBS is the D-BOX secondary channel.
583 string const channels[] = {
607 valid_image_file (boost::filesystem::path f)
609 if (boost::starts_with (f.leaf().string(), "._")) {
613 auto ext = f.extension().string();
614 transform (ext.begin(), ext.end(), ext.begin(), ::tolower);
616 ext == ".tif" || ext == ".tiff" || ext == ".jpg" || ext == ".jpeg" ||
617 ext == ".png" || ext == ".bmp" || ext == ".tga" || ext == ".dpx" ||
618 ext == ".j2c" || ext == ".j2k" || ext == ".jp2" || ext == ".exr" ||
624 valid_sound_file (boost::filesystem::path f)
626 if (boost::starts_with (f.leaf().string(), "._")) {
630 auto ext = f.extension().string();
631 transform (ext.begin(), ext.end(), ext.begin(), ::tolower);
632 return (ext == ".wav" || ext == ".mp3" || ext == ".aif" || ext == ".aiff");
636 valid_j2k_file (boost::filesystem::path f)
638 auto ext = f.extension().string();
639 transform (ext.begin(), ext.end(), ext.begin(), ::tolower);
640 return (ext == ".j2k" || ext == ".j2c" || ext == ".jp2");
644 tidy_for_filename (string f)
646 boost::replace_if (f, boost::is_any_of ("\\/:"), '_');
651 fit_ratio_within (float ratio, dcp::Size full_frame)
653 if (ratio < full_frame.ratio ()) {
654 return dcp::Size (lrintf (full_frame.height * ratio), full_frame.height);
657 return dcp::Size (full_frame.width, lrintf (full_frame.width / ratio));
661 wrapped_av_malloc (size_t s)
663 auto p = av_malloc (s);
671 split_get_request (string url)
674 AWAITING_QUESTION_MARK,
677 } state = AWAITING_QUESTION_MARK;
679 map<string, string> r;
682 for (size_t i = 0; i < url.length(); ++i) {
684 case AWAITING_QUESTION_MARK:
699 r.insert (make_pair (k, v));
709 if (state == VALUE) {
710 r.insert (make_pair (k, v));
717 video_asset_filename (shared_ptr<dcp::PictureAsset> asset, int reel_index, int reel_count, optional<string> summary)
719 dcp::NameFormat::Map values;
721 values['r'] = raw_convert<string> (reel_index + 1);
722 values['n'] = raw_convert<string> (reel_count);
724 values['c'] = careful_string_filter (summary.get());
726 return Config::instance()->dcp_asset_filename_format().get(values, "_" + asset->id() + ".mxf");
730 audio_asset_filename (shared_ptr<dcp::SoundAsset> asset, int reel_index, int reel_count, optional<string> summary)
732 dcp::NameFormat::Map values;
734 values['r'] = raw_convert<string> (reel_index + 1);
735 values['n'] = raw_convert<string> (reel_count);
737 values['c'] = careful_string_filter (summary.get());
739 return Config::instance()->dcp_asset_filename_format().get(values, "_" + asset->id() + ".mxf");
744 atmos_asset_filename (shared_ptr<dcp::AtmosAsset> asset, int reel_index, int reel_count, optional<string> summary)
746 dcp::NameFormat::Map values;
747 values['t'] = "atmos";
748 values['r'] = raw_convert<string> (reel_index + 1);
749 values['n'] = raw_convert<string> (reel_count);
751 values['c'] = careful_string_filter (summary.get());
753 return Config::instance()->dcp_asset_filename_format().get(values, "_" + asset->id() + ".mxf");
758 relaxed_string_to_float (string s)
761 boost::algorithm::replace_all (s, ",", ".");
762 return lexical_cast<float> (s);
763 } catch (bad_lexical_cast &) {
764 boost::algorithm::replace_all (s, ".", ",");
765 return lexical_cast<float> (s);
770 careful_string_filter (string s)
772 /* Filter out `bad' characters which `may' cause problems with some systems (either for DCP name or filename).
773 There's no apparent list of what really is allowed, so this is a guess.
774 Safety first and all that.
777 /* First transliterate using libicu to try to remove accents in a "nice" way */
778 auto icu_utf16 = icu::UnicodeString::fromUTF8(icu::StringPiece(s));
779 auto status = U_ZERO_ERROR;
780 auto transliterator = icu::Transliterator::createInstance("NFD; [:M:] Remove; NFC", UTRANS_FORWARD, status);
781 transliterator->transliterate(icu_utf16);
783 icu_utf16.toUTF8String(s);
785 /* Then remove anything that's not in a very limited character set */
786 wstring ws = boost::locale::conv::utf_to_utf<wchar_t>(s);
788 string const allowed = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz-_%.+";
789 for (size_t i = 0; i < ws.size(); ++i) {
791 if (allowed.find(c) != string::npos) {
796 return boost::locale::conv::utf_to_utf<char>(out);
799 /** @param mapped List of mapped audio channels from a Film.
800 * @param channels Total number of channels in the Film.
801 * @return First: number of non-LFE soundtrack channels (L/R/C/Ls/Rs/Lc/Rc/Bsl/Bsr), second: number of LFE channels.
804 audio_channel_types (list<int> mapped, int channels)
809 for (auto i: mapped) {
811 /* This channel is mapped but is not included in the DCP */
815 switch (static_cast<dcp::Channel>(i)) {
816 case dcp::Channel::LFE:
819 case dcp::Channel::LEFT:
820 case dcp::Channel::RIGHT:
821 case dcp::Channel::CENTRE:
822 case dcp::Channel::LS:
823 case dcp::Channel::RS:
824 case dcp::Channel::BSL:
825 case dcp::Channel::BSR:
828 case dcp::Channel::HI:
829 case dcp::Channel::VI:
830 case dcp::Channel::MOTION_DATA:
831 case dcp::Channel::SYNC_SIGNAL:
832 case dcp::Channel::SIGN_LANGUAGE:
833 case dcp::Channel::CHANNEL_COUNT:
838 return make_pair (non_lfe, lfe);
841 shared_ptr<AudioBuffers>
842 remap (shared_ptr<const AudioBuffers> input, int output_channels, AudioMapping map)
844 auto mapped = make_shared<AudioBuffers>(output_channels, input->frames());
845 mapped->make_silent ();
847 int to_do = min (map.input_channels(), input->channels());
849 for (int i = 0; i < to_do; ++i) {
850 for (int j = 0; j < mapped->channels(); ++j) {
851 if (map.get(i, j) > 0) {
852 mapped->accumulate_channel(
866 increment_eyes (Eyes e)
868 if (e == Eyes::LEFT) {
876 checked_fwrite (void const * ptr, size_t size, FILE* stream, boost::filesystem::path path)
878 size_t N = fwrite (ptr, 1, size, stream);
880 if (ferror(stream)) {
882 throw FileError (String::compose("fwrite error %1", errno), path);
885 throw FileError ("Unexpected short write", path);
891 checked_fread (void* ptr, size_t size, FILE* stream, boost::filesystem::path path)
893 size_t N = fread (ptr, 1, size, stream);
895 if (ferror(stream)) {
897 throw FileError (String::compose("fread error %1", errno), path);
900 throw FileError ("Unexpected short read", path);
906 utf8_strlen (string s)
908 size_t const len = s.length ();
910 for (size_t i = 0; i < len; ++i) {
911 unsigned char c = s[i];
912 if ((c & 0xe0) == 0xc0) {
914 } else if ((c & 0xf0) == 0xe0) {
916 } else if ((c & 0xf8) == 0xf0) {
925 day_of_week_to_string (boost::gregorian::greg_weekday d)
927 switch (d.as_enum()) {
928 case boost::date_time::Sunday:
930 case boost::date_time::Monday:
932 case boost::date_time::Tuesday:
934 case boost::date_time::Wednesday:
935 return _("Wednesday");
936 case boost::date_time::Thursday:
937 return _("Thursday");
938 case boost::date_time::Friday:
940 case boost::date_time::Saturday:
941 return _("Saturday");
944 return d.as_long_string ();
947 /** @param size Size of picture that the subtitle will be overlaid onto */
949 emit_subtitle_image (ContentTimePeriod period, dcp::SubtitleImage sub, dcp::Size size, shared_ptr<TextDecoder> decoder)
951 /* XXX: this is rather inefficient; decoding the image just to get its size */
952 FFmpegImageProxy proxy (sub.png_image(), VideoRange::FULL);
953 auto image = proxy.image().image;
954 /* set up rect with height and width */
955 dcpomatic::Rect<double> rect(0, 0, image->size().width / double(size.width), image->size().height / double(size.height));
957 /* add in position */
959 switch (sub.h_align()) {
960 case dcp::HAlign::LEFT:
961 rect.x += sub.h_position();
963 case dcp::HAlign::CENTER:
964 rect.x += 0.5 + sub.h_position() - rect.width / 2;
966 case dcp::HAlign::RIGHT:
967 rect.x += 1 - sub.h_position() - rect.width;
971 switch (sub.v_align()) {
972 case dcp::VAlign::TOP:
973 rect.y += sub.v_position();
975 case dcp::VAlign::CENTER:
976 rect.y += 0.5 + sub.v_position() - rect.height / 2;
978 case dcp::VAlign::BOTTOM:
979 rect.y += 1 - sub.v_position() - rect.height;
983 decoder->emit_bitmap (period, image, rect);
987 show_jobs_on_console (bool progress)
993 dcpomatic_sleep_seconds (5);
995 auto jobs = JobManager::instance()->get();
997 if (!first && progress) {
998 for (size_t i = 0; i < jobs.size(); ++i) {
999 cout << "\033[1A\033[2K";
1006 for (auto i: jobs) {
1009 if (!i->sub_name().empty()) {
1010 cout << "; " << i->sub_name();
1014 if (i->progress ()) {
1015 cout << i->status() << " \n";
1017 cout << ": Running \n";
1021 if (!progress && i->finished_in_error()) {
1022 /* We won't see this error if we haven't been showing progress,
1025 cout << i->status() << "\n";
1028 if (i->finished_in_error()) {
1033 if (!JobManager::instance()->work_to_do()) {
1041 /** XXX: could use mmap? */
1043 copy_in_bits (boost::filesystem::path from, boost::filesystem::path to, boost::function<void (float)> progress)
1045 auto f = fopen_boost (from, "rb");
1047 throw OpenFileError (from, errno, OpenFileError::READ);
1049 auto t = fopen_boost (to, "wb");
1052 throw OpenFileError (to, errno, OpenFileError::WRITE);
1055 /* on the order of a second's worth of copying */
1056 boost::uintmax_t const chunk = 20 * 1024 * 1024;
1058 auto buffer = static_cast<uint8_t*> (malloc(chunk));
1060 throw std::bad_alloc ();
1063 boost::uintmax_t const total = boost::filesystem::file_size (from);
1064 boost::uintmax_t remaining = total;
1067 boost::uintmax_t this_time = min (chunk, remaining);
1068 size_t N = fread (buffer, 1, chunk, f);
1069 if (N < this_time) {
1073 throw ReadFileError (from, errno);
1076 N = fwrite (buffer, 1, this_time, t);
1077 if (N < this_time) {
1081 throw WriteFileError (to, errno);
1084 progress (1 - float(remaining) / total);
1085 remaining -= this_time;
1094 db_to_linear (double db)
1096 return pow(10, db / 20);
1100 linear_to_db (double linear)
1102 return 20 * log10(linear);
1107 scale_for_display (dcp::Size s, dcp::Size display_container, dcp::Size film_container)
1109 /* Now scale it down if the display container is smaller than the film container */
1110 if (display_container != film_container) {
1111 float const scale = min (
1112 float (display_container.width) / film_container.width,
1113 float (display_container.height) / film_container.height
1116 s.width = lrintf (s.width * scale);
1117 s.height = lrintf (s.height * scale);
1125 decrypt_kdm_with_helpful_error (dcp::EncryptedKDM kdm)
1128 return dcp::DecryptedKDM (kdm, Config::instance()->decryption_chain()->key().get());
1129 } catch (dcp::KDMDecryptionError& e) {
1130 /* Try to flesh out the error a bit */
1131 auto const kdm_subject_name = kdm.recipient_x509_subject_name();
1132 bool on_chain = false;
1133 auto dc = Config::instance()->decryption_chain();
1134 for (auto i: dc->root_to_leaf()) {
1135 if (i.subject() == kdm_subject_name) {
1140 throw KDMError (_("This KDM was not made for DCP-o-matic's decryption certificate."), e.what());
1141 } else if (kdm_subject_name != dc->leaf().subject()) {
1142 throw KDMError (_("This KDM was made for DCP-o-matic but not for its leaf certificate."), e.what());
1150 boost::filesystem::path
1151 default_font_file ()
1153 boost::filesystem::path liberation_normal;
1155 liberation_normal = resources_path() / "LiberationSans-Regular.ttf";
1156 if (!boost::filesystem::exists (liberation_normal)) {
1157 /* Hack for unit tests */
1158 liberation_normal = resources_path() / "fonts" / "LiberationSans-Regular.ttf";
1160 } catch (boost::filesystem::filesystem_error& e) {
1164 if (!boost::filesystem::exists(liberation_normal)) {
1165 liberation_normal = "/usr/share/fonts/truetype/liberation/LiberationSans-Regular.ttf";
1168 return liberation_normal;