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 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 <boost/algorithm/string.hpp>
66 #include <boost/range/algorithm/replace_if.hpp>
67 #include <boost/thread.hpp>
68 #include <boost/filesystem.hpp>
69 DCPOMATIC_DISABLE_WARNINGS
70 #include <boost/locale.hpp>
71 DCPOMATIC_ENABLE_WARNINGS
72 #ifdef DCPOMATIC_WINDOWS
73 #include <boost/locale.hpp>
82 #ifdef DCPOMATIC_POSIX
103 using std::bad_alloc;
104 using std::set_terminate;
105 using std::make_pair;
106 using boost::shared_ptr;
108 using boost::optional;
109 using boost::lexical_cast;
110 using boost::bad_lexical_cast;
111 using boost::scoped_array;
113 using dcp::raw_convert;
114 using dcp::locale_convert;
115 using namespace dcpomatic;
117 /** Path to our executable, required by the stacktrace stuff and filled
118 * in during App::onInit().
121 bool is_batch_converter = false;
122 static boost::thread::id ui_thread;
123 static boost::filesystem::path backtrace_file;
125 /** Convert some number of seconds to a string representation
126 * in hours, minutes and seconds.
129 * @return String of the form H:M:S (where H is hours, M
130 * is minutes and S is seconds).
133 seconds_to_hms (int s)
141 snprintf (buffer, sizeof(buffer), "%d:%02d:%02d", h, m, s);
146 time_to_hmsf (DCPTime time, Frame rate)
148 Frame f = time.frames_round (rate);
157 snprintf (buffer, sizeof(buffer), "%d:%02d:%02d.%d", h, m, s, static_cast<int>(f));
161 /** @param s Number of seconds.
162 * @return String containing an approximate description of s (e.g. "about 2 hours")
165 seconds_to_approximate_hms (int s)
175 bool minutes = h < 6 && m > 0;
176 bool seconds = h == 0 && m < 10 && s > 0;
178 if (m > 30 && !minutes) {
179 /* round up the hours */
182 if (s > 30 && !seconds) {
183 /* round up the minutes */
193 /// TRANSLATORS: h here is an abbreviation for hours
194 ap += locale_convert<string>(h) + _("h");
196 if (minutes || seconds) {
202 /// TRANSLATORS: m here is an abbreviation for minutes
203 ap += locale_convert<string>(m) + _("m");
212 /// TRANSLATORS: s here is an abbreviation for seconds
213 ap += locale_convert<string>(s) + _("s");
220 seconds (struct timeval t)
222 return t.tv_sec + (double (t.tv_usec) / 1e6);
225 #ifdef DCPOMATIC_WINDOWS
227 /** Resolve symbol name and source location given the path to the executable */
229 addr2line (void const * const addr)
231 char addr2line_cmd[512] = { 0 };
232 sprintf (addr2line_cmd, "addr2line -f -p -e %.256s %p > %s", program_name.c_str(), addr, backtrace_file.string().c_str());
233 return system(addr2line_cmd);
236 DCPOMATIC_DISABLE_WARNINGS
237 /** This is called when C signals occur on Windows (e.g. SIGSEGV)
238 * (NOT C++ exceptions!). We write a backtrace to backtrace_file by dark means.
239 * Adapted from code here: http://spin.atomicobject.com/2013/01/13/exceptions-stack-traces-c/
242 exception_handler(struct _EXCEPTION_POINTERS * info)
244 FILE* f = fopen_boost (backtrace_file, "w");
245 fprintf (f, "C-style exception %d\n", info->ExceptionRecord->ExceptionCode);
248 if (info->ExceptionRecord->ExceptionCode != EXCEPTION_STACK_OVERFLOW) {
249 CONTEXT* context = info->ContextRecord;
250 SymInitialize (GetCurrentProcess (), 0, true);
252 STACKFRAME frame = { 0 };
254 /* setup initial stack frame */
256 frame.AddrPC.Offset = context->Rip;
257 frame.AddrStack.Offset = context->Rsp;
258 frame.AddrFrame.Offset = context->Rbp;
260 frame.AddrPC.Offset = context->Eip;
261 frame.AddrStack.Offset = context->Esp;
262 frame.AddrFrame.Offset = context->Ebp;
264 frame.AddrPC.Mode = AddrModeFlat;
265 frame.AddrStack.Mode = AddrModeFlat;
266 frame.AddrFrame.Mode = AddrModeFlat;
270 IMAGE_FILE_MACHINE_I386,
271 GetCurrentProcess (),
276 SymFunctionTableAccess,
281 addr2line((void *) frame.AddrPC.Offset);
285 addr2line ((void *) info->ContextRecord->Rip);
287 addr2line ((void *) info->ContextRecord->Eip);
291 return EXCEPTION_CONTINUE_SEARCH;
293 DCPOMATIC_ENABLE_WARNINGS
297 set_backtrace_file (boost::filesystem::path p)
302 /** This is called when there is an unhandled exception. Any
303 * backtrace in this function is useless on Windows as the stack has
304 * already been unwound from the throw; we have the gdb wrap hack to
311 static bool tried_throw = false;
312 // try once to re-throw currently active exception
318 catch (const std::exception &e) {
319 std::cerr << __FUNCTION__ << " caught unhandled exception. what(): "
320 << e.what() << std::endl;
323 std::cerr << __FUNCTION__ << " caught unknown/unhandled exception."
331 dcpomatic_setup_path_encoding ()
333 #ifdef DCPOMATIC_WINDOWS
334 /* Dark voodoo which, I think, gets boost::filesystem::path to
335 correctly convert UTF-8 strings to paths, and also paths
336 back to UTF-8 strings (on path::string()).
338 After this, constructing boost::filesystem::paths from strings
339 converts from UTF-8 to UTF-16 inside the path. Then
340 path::string().c_str() gives UTF-8 and
341 path::c_str() gives UTF-16.
343 This is all Windows-only. AFAICT Linux/OS X use UTF-8 everywhere,
344 so things are much simpler.
346 std::locale::global (boost::locale::generator().generate (""));
347 boost::filesystem::path::imbue (std::locale ());
351 /** Call the required functions to set up DCP-o-matic's static arrays, etc.
352 * Must be called from the UI thread, if there is one.
357 #ifdef DCPOMATIC_WINDOWS
358 boost::filesystem::path p = g_get_user_config_dir ();
359 p /= "backtrace.txt";
360 set_backtrace_file (p);
361 SetUnhandledExceptionFilter(exception_handler);
364 DCPOMATIC_DISABLE_WARNINGS
366 avfilter_register_all ();
367 DCPOMATIC_ENABLE_WARNINGS
370 /* Add our library directory to the libltdl search path so that
371 xmlsec can find xmlsec1-openssl.
373 boost::filesystem::path lib = directory_containing_executable().parent_path();
375 setenv ("LTDL_LIBRARY_PATH", lib.c_str (), 1);
378 set_terminate (terminate);
380 #ifdef DCPOMATIC_WINDOWS
381 putenv ("PANGOCAIRO_BACKEND=fontconfig");
382 putenv (String::compose("FONTCONFIG_PATH=%1", shared_path().string()).c_str());
386 setenv ("PANGOCAIRO_BACKEND", "fontconfig", 1);
387 setenv ("FONTCONFIG_PATH", shared_path().string().c_str(), 1);
393 #if defined(DCPOMATIC_WINDOWS) || defined(DCPOMATIC_OSX)
394 /* Render something to fontconfig to create its cache */
395 list<StringText> subs;
396 dcp::SubtitleString ss(
397 optional<string>(), false, false, false, dcp::Colour(), 42, 1, dcp::Time(), dcp::Time(), 0, dcp::HALIGN_CENTER, 0, dcp::VALIGN_CENTER, dcp::DIRECTION_LTR,
398 "Hello dolly", dcp::NONE, dcp::Colour(), dcp::Time(), dcp::Time()
400 subs.push_back (StringText(ss, 0));
401 render_text (subs, list<shared_ptr<Font> >(), dcp::Size(640, 480), DCPTime(), 24);
404 Ratio::setup_ratios ();
405 PresetColourConversion::setup_colour_conversion_presets ();
406 DCPContentType::setup_dcp_content_types ();
407 Filter::setup_filters ();
408 CinemaSoundProcessor::setup_cinema_sound_processors ();
409 AudioProcessor::setup_audio_processors ();
411 curl_global_init (CURL_GLOBAL_ALL);
413 ui_thread = boost::this_thread::get_id ();
416 #ifdef DCPOMATIC_WINDOWS
417 boost::filesystem::path
421 GetModuleFileName (0, buffer, 512 * sizeof(wchar_t));
422 boost::filesystem::path p (buffer);
423 p = p.parent_path ();
424 p = p.parent_path ();
431 boost::filesystem::path
434 return "DCP-o-matic 2.app/Contents/Resources";
439 dcpomatic_setup_gettext_i18n (string lang)
441 #ifdef DCPOMATIC_LINUX
445 if (!lang.empty ()) {
446 /* Override our environment language. Note that the caller must not
447 free the string passed into putenv().
449 string s = String::compose ("LANGUAGE=%1", lang);
450 putenv (strdup (s.c_str ()));
451 s = String::compose ("LANG=%1", lang);
452 putenv (strdup (s.c_str ()));
453 s = String::compose ("LC_ALL=%1", lang);
454 putenv (strdup (s.c_str ()));
457 setlocale (LC_ALL, "");
458 textdomain ("libdcpomatic2");
460 #if defined(DCPOMATIC_WINDOWS) || defined(DCPOMATIC_OSX)
461 bindtextdomain ("libdcpomatic2", mo_path().string().c_str());
462 bind_textdomain_codeset ("libdcpomatic2", "UTF8");
465 #ifdef DCPOMATIC_LINUX
466 bindtextdomain ("libdcpomatic2", LINUX_LOCALE_PREFIX);
470 /** Compute a digest of the first and last `size' bytes of a set of files. */
472 digest_head_tail (vector<boost::filesystem::path> files, boost::uintmax_t size)
474 boost::scoped_array<char> buffer (new char[size]);
478 boost::uintmax_t to_do = size;
479 char* p = buffer.get ();
481 while (i < int64_t (files.size()) && to_do > 0) {
482 FILE* f = fopen_boost (files[i], "rb");
484 throw OpenFileError (files[i].string(), errno, OpenFileError::READ);
487 boost::uintmax_t this_time = min (to_do, boost::filesystem::file_size (files[i]));
488 checked_fread (p, this_time, f, files[i]);
495 digester.add (buffer.get(), size - to_do);
500 i = files.size() - 1;
501 while (i >= 0 && to_do > 0) {
502 FILE* f = fopen_boost (files[i], "rb");
504 throw OpenFileError (files[i].string(), errno, OpenFileError::READ);
507 boost::uintmax_t this_time = min (to_do, boost::filesystem::file_size (files[i]));
508 dcpomatic_fseek (f, -this_time, SEEK_END);
509 checked_fread (p, this_time, f, files[i]);
516 digester.add (buffer.get(), size - to_do);
518 return digester.get ();
521 /** Round a number up to the nearest multiple of another number.
523 * @param stride Array of numbers to round, indexed by c.
524 * @param t Multiple to round to.
525 * @return Rounded number.
528 stride_round_up (int c, int const * stride, int t)
530 int const a = stride[c] + (t - 1);
534 /** Trip an assert if the caller is not in the UI thread */
538 DCPOMATIC_ASSERT (boost::this_thread::get_id() == ui_thread);
542 audio_channel_name (int c)
544 DCPOMATIC_ASSERT (MAX_DCP_AUDIO_CHANNELS == 16);
546 /// TRANSLATORS: these are the names of audio channels; Lfe (sub) is the low-frequency
547 /// enhancement channel (sub-woofer).
548 string const channels[] = {
555 _("Hearing impaired"),
556 _("Visually impaired"),
559 _("Left rear surround"),
560 _("Right rear surround"),
562 _("D-BOX secondary"),
571 short_audio_channel_name (int c)
573 DCPOMATIC_ASSERT (MAX_DCP_AUDIO_CHANNELS == 16);
575 /// TRANSLATORS: these are short names of audio channels; Lfe is the low-frequency
576 /// enhancement channel (sub-woofer). HI is the hearing-impaired audio track and
577 /// VI is the visually-impaired audio track (audio describe). DBP is the D-BOX
578 /// primary channel and DBS is the D-BOX secondary channel.
579 string const channels[] = {
603 valid_image_file (boost::filesystem::path f)
605 if (boost::starts_with (f.leaf().string(), "._")) {
609 string ext = f.extension().string();
610 transform (ext.begin(), ext.end(), ext.begin(), ::tolower);
612 ext == ".tif" || ext == ".tiff" || ext == ".jpg" || ext == ".jpeg" ||
613 ext == ".png" || ext == ".bmp" || ext == ".tga" || ext == ".dpx" ||
614 ext == ".j2c" || ext == ".j2k" || ext == ".jp2" || ext == ".exr" ||
615 ext == ".jpf" || ext == ".ppm"
620 valid_sound_file (boost::filesystem::path f)
622 if (boost::starts_with (f.leaf().string(), "._")) {
626 string ext = f.extension().string();
627 transform (ext.begin(), ext.end(), ext.begin(), ::tolower);
628 return (ext == ".wav" || ext == ".mp3" || ext == ".aif" || ext == ".aiff");
632 valid_j2k_file (boost::filesystem::path f)
634 string ext = f.extension().string();
635 transform (ext.begin(), ext.end(), ext.begin(), ::tolower);
636 return (ext == ".j2k" || ext == ".j2c" || ext == ".jp2");
640 tidy_for_filename (string f)
642 boost::replace_if (f, boost::is_any_of ("\\/:"), '_');
647 fit_ratio_within (float ratio, dcp::Size full_frame)
649 if (ratio < full_frame.ratio ()) {
650 return dcp::Size (lrintf (full_frame.height * ratio), full_frame.height);
653 return dcp::Size (full_frame.width, lrintf (full_frame.width / ratio));
657 wrapped_av_malloc (size_t s)
659 void* p = av_malloc (s);
667 split_get_request (string url)
670 AWAITING_QUESTION_MARK,
673 } state = AWAITING_QUESTION_MARK;
675 map<string, string> r;
678 for (size_t i = 0; i < url.length(); ++i) {
680 case AWAITING_QUESTION_MARK:
695 r.insert (make_pair (k, v));
705 if (state == VALUE) {
706 r.insert (make_pair (k, v));
713 video_asset_filename (shared_ptr<dcp::PictureAsset> asset, int reel_index, int reel_count, optional<string> summary)
715 dcp::NameFormat::Map values;
717 values['r'] = raw_convert<string> (reel_index + 1);
718 values['n'] = raw_convert<string> (reel_count);
720 values['c'] = careful_string_filter (summary.get());
722 return Config::instance()->dcp_asset_filename_format().get(values, "_" + asset->id() + ".mxf");
726 audio_asset_filename (shared_ptr<dcp::SoundAsset> asset, int reel_index, int reel_count, optional<string> summary)
728 dcp::NameFormat::Map values;
730 values['r'] = raw_convert<string> (reel_index + 1);
731 values['n'] = raw_convert<string> (reel_count);
733 values['c'] = careful_string_filter (summary.get());
735 return Config::instance()->dcp_asset_filename_format().get(values, "_" + asset->id() + ".mxf");
740 atmos_asset_filename (shared_ptr<dcp::AtmosAsset> asset, int reel_index, int reel_count, optional<string> summary)
742 dcp::NameFormat::Map values;
743 values['t'] = "atmos";
744 values['r'] = raw_convert<string> (reel_index + 1);
745 values['n'] = raw_convert<string> (reel_count);
747 values['c'] = careful_string_filter (summary.get());
749 return Config::instance()->dcp_asset_filename_format().get(values, "_" + asset->id() + ".mxf");
754 relaxed_string_to_float (string s)
757 boost::algorithm::replace_all (s, ",", ".");
758 return lexical_cast<float> (s);
759 } catch (bad_lexical_cast &) {
760 boost::algorithm::replace_all (s, ".", ",");
761 return lexical_cast<float> (s);
766 careful_string_filter (string s)
768 /* Filter out `bad' characters which `may' cause problems with some systems (either for DCP name or filename).
769 There's no apparent list of what really is allowed, so this is a guess.
770 Safety first and all that.
773 wstring ws = boost::locale::conv::utf_to_utf<wchar_t>(s);
776 string const allowed = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz-_%.+";
777 for (size_t i = 0; i < ws.size(); ++i) {
781 /* Remove some accents */
782 if (wstring(L"áà â").find(c) != string::npos) {
785 if (wstring(L"éèêë").find(c) != string::npos) {
788 if (wstring(L"ö").find(c) != string::npos) {
791 if (wstring(L"ü").find(c) != string::npos) {
795 if (allowed.find(c) != string::npos) {
800 return boost::locale::conv::utf_to_utf<char>(out);
803 /** @param mapped List of mapped audio channels from a Film.
804 * @param channels Total number of channels in the Film.
805 * @return First: number of non-LFE soundtrack channels (L/R/C/Ls/Rs/Lc/Rc/Bsl/Bsr), second: number of LFE channels.
808 audio_channel_types (list<int> mapped, int channels)
813 BOOST_FOREACH (int i, mapped) {
815 /* This channel is mapped but is not included in the DCP */
819 switch (static_cast<dcp::Channel>(i)) {
840 return make_pair (non_lfe, lfe);
843 shared_ptr<AudioBuffers>
844 remap (shared_ptr<const AudioBuffers> input, int output_channels, AudioMapping map)
846 shared_ptr<AudioBuffers> mapped (new AudioBuffers (output_channels, input->frames()));
847 mapped->make_silent ();
849 int to_do = min (map.input_channels(), input->channels());
851 for (int i = 0; i < to_do; ++i) {
852 for (int j = 0; j < mapped->channels(); ++j) {
853 if (map.get (i, static_cast<dcp::Channel> (j)) > 0) {
854 mapped->accumulate_channel (
857 static_cast<dcp::Channel> (j),
858 map.get (i, static_cast<dcp::Channel> (j))
868 increment_eyes (Eyes e)
870 if (e == EYES_LEFT) {
878 checked_fwrite (void const * ptr, size_t size, FILE* stream, boost::filesystem::path path)
880 size_t N = fwrite (ptr, 1, size, stream);
882 if (ferror(stream)) {
884 throw FileError (String::compose("fwrite error %1", errno), path);
887 throw FileError ("Unexpected short write", path);
893 checked_fread (void* ptr, size_t size, FILE* stream, boost::filesystem::path path)
895 size_t N = fread (ptr, 1, size, stream);
897 if (ferror(stream)) {
899 throw FileError (String::compose("fread error %1", errno), path);
902 throw FileError ("Unexpected short read", path);
908 utf8_strlen (string s)
910 size_t const len = s.length ();
912 for (size_t i = 0; i < len; ++i) {
913 unsigned char c = s[i];
914 if ((c & 0xe0) == 0xc0) {
916 } else if ((c & 0xf0) == 0xe0) {
918 } else if ((c & 0xf8) == 0xf0) {
927 day_of_week_to_string (boost::gregorian::greg_weekday d)
929 switch (d.as_enum()) {
930 case boost::date_time::Sunday:
932 case boost::date_time::Monday:
934 case boost::date_time::Tuesday:
936 case boost::date_time::Wednesday:
937 return _("Wednesday");
938 case boost::date_time::Thursday:
939 return _("Thursday");
940 case boost::date_time::Friday:
942 case boost::date_time::Saturday:
943 return _("Saturday");
946 return d.as_long_string ();
949 /** @param size Size of picture that the subtitle will be overlaid onto */
951 emit_subtitle_image (ContentTimePeriod period, dcp::SubtitleImage sub, dcp::Size size, shared_ptr<TextDecoder> decoder)
953 /* XXX: this is rather inefficient; decoding the image just to get its size */
954 FFmpegImageProxy proxy (sub.png_image());
955 shared_ptr<Image> image = proxy.image().image;
956 /* set up rect with height and width */
957 dcpomatic::Rect<double> rect(0, 0, image->size().width / double(size.width), image->size().height / double(size.height));
959 /* add in position */
961 switch (sub.h_align()) {
962 case dcp::HALIGN_LEFT:
963 rect.x += sub.h_position();
965 case dcp::HALIGN_CENTER:
966 rect.x += 0.5 + sub.h_position() - rect.width / 2;
968 case dcp::HALIGN_RIGHT:
969 rect.x += 1 - sub.h_position() - rect.width;
973 switch (sub.v_align()) {
974 case dcp::VALIGN_TOP:
975 rect.y += sub.v_position();
977 case dcp::VALIGN_CENTER:
978 rect.y += 0.5 + sub.v_position() - rect.height / 2;
980 case dcp::VALIGN_BOTTOM:
981 rect.y += 1 - sub.v_position() - rect.height;
985 decoder->emit_bitmap (period, image, rect);
989 show_jobs_on_console (bool progress)
995 dcpomatic_sleep_seconds (5);
997 list<shared_ptr<Job> > jobs = JobManager::instance()->get();
999 if (!first && progress) {
1000 for (size_t i = 0; i < jobs.size(); ++i) {
1001 cout << "\033[1A\033[2K";
1008 BOOST_FOREACH (shared_ptr<Job> i, jobs) {
1011 if (!i->sub_name().empty()) {
1012 cout << "; " << i->sub_name();
1016 if (i->progress ()) {
1017 cout << i->status() << " \n";
1019 cout << ": Running \n";
1023 if (!progress && i->finished_in_error()) {
1024 /* We won't see this error if we haven't been showing progress,
1027 cout << i->status() << "\n";
1030 if (i->finished_in_error()) {
1035 if (!JobManager::instance()->work_to_do()) {
1043 /** XXX: could use mmap? */
1045 copy_in_bits (boost::filesystem::path from, boost::filesystem::path to, boost::function<void (float)> progress)
1047 FILE* f = fopen_boost (from, "rb");
1049 throw OpenFileError (from, errno, OpenFileError::READ);
1051 FILE* t = fopen_boost (to, "wb");
1054 throw OpenFileError (to, errno, OpenFileError::WRITE);
1057 /* on the order of a second's worth of copying */
1058 boost::uintmax_t const chunk = 20 * 1024 * 1024;
1060 uint8_t* buffer = static_cast<uint8_t*> (malloc(chunk));
1062 throw std::bad_alloc ();
1065 boost::uintmax_t const total = boost::filesystem::file_size (from);
1066 boost::uintmax_t remaining = total;
1069 boost::uintmax_t this_time = min (chunk, remaining);
1070 size_t N = fread (buffer, 1, chunk, f);
1071 if (N < this_time) {
1075 throw ReadFileError (from, errno);
1078 N = fwrite (buffer, 1, this_time, t);
1079 if (N < this_time) {
1083 throw WriteFileError (to, errno);
1086 progress (1 - float(remaining) / total);
1087 remaining -= this_time;
1095 #ifdef DCPOMATIC_VARIANT_SWAROOP
1097 /* Make up a key from the machine UUID */
1101 dcp::Data key (dcpomatic::crypto_key_length());
1102 memset (key.data().get(), 0, key.size());
1103 string const magic = command_and_read ("dcpomatic2_uuid");
1104 strncpy ((char *) key.data().get(), magic.c_str(), dcpomatic::crypto_key_length());
1108 /* swaroop chain file format:
1110 * 0 [int16_t] IV length
1111 * 2 [int16_t] cert #1 length, or 0 for none
1112 * 4 [int16_t] cert #2 length, or 0 for none
1113 * 6 [int16_t] cert #3 length, or 0 for none
1114 * 8 [int16_t] cert #4 length, or 0 for none
1115 * 10 [int16_t] cert #5 length, or 0 for none
1116 * 12 [int16_t] cert #6 length, or 0 for none
1117 * 14 [int16_t] cert #7 length, or 0 for none
1118 * 16 [int16_t] cert #8 length, or 0 for none
1119 * 16 [int16_t] private key length
1132 struct __attribute__ ((packed)) Header_ {
1134 int16_t cert_length[8];
1135 int16_t private_key_length;
1138 typedef struct Header_ Header;
1140 shared_ptr<dcp::CertificateChain>
1141 read_swaroop_chain (boost::filesystem::path path)
1143 dcp::Data data (path);
1144 Header* header = (Header *) data.data().get();
1145 uint8_t* p = data.data().get() + sizeof(Header);
1147 dcp::Data iv (p, header->iv_length);
1150 shared_ptr<dcp::CertificateChain> cc (new dcp::CertificateChain());
1151 for (int i = 0; i < 8; ++i) {
1152 if (header->cert_length[i] == 0) {
1155 dcp::Data c(p, header->cert_length[i]);
1157 cc->add (dcp::Certificate(dcpomatic::decrypt(c, key_from_uuid(), iv)));
1160 dcp::Data k (p, header->private_key_length);
1161 cc->set_key (dcpomatic::decrypt(k, key_from_uuid(), iv));
1166 write_swaroop_chain (shared_ptr<const dcp::CertificateChain> chain, boost::filesystem::path output)
1168 scoped_array<uint8_t> buffer (new uint8_t[65536]);
1169 Header* header = (Header *) buffer.get();
1170 memset (header, 0, sizeof(Header));
1171 uint8_t* p = buffer.get() + sizeof(Header);
1173 dcp::Data iv = dcpomatic::random_iv ();
1174 header->iv_length = iv.size ();
1175 memcpy (p, iv.data().get(), iv.size());
1179 BOOST_FOREACH (dcp::Certificate i, chain->root_to_leaf()) {
1180 dcp::Data e = dcpomatic::encrypt (i.certificate(true), key_from_uuid(), iv);
1181 memcpy (p, e.data().get(), e.size());
1183 DCPOMATIC_ASSERT (N < 8);
1184 header->cert_length[N] = e.size ();
1188 dcp::Data k = dcpomatic::encrypt (chain->key().get(), key_from_uuid(), iv);
1189 memcpy (p, k.data().get(), k.size());
1191 header->private_key_length = k.size ();
1193 FILE* f = fopen_boost (output, "wb");
1194 checked_fwrite (buffer.get(), p - buffer.get(), f, output);
1201 db_to_linear (double db)
1203 return pow(10, db / 20);
1207 linear_to_db (double linear)
1209 return 20 * log10(linear);
1214 scale_for_display (dcp::Size s, dcp::Size display_container, dcp::Size film_container)
1216 /* Now scale it down if the display container is smaller than the film container */
1217 if (display_container != film_container) {
1218 float const scale = min (
1219 float (display_container.width) / film_container.width,
1220 float (display_container.height) / film_container.height
1223 s.width = lrintf (s.width * scale);
1224 s.height = lrintf (s.height * scale);
1232 decrypt_kdm_with_helpful_error (dcp::EncryptedKDM kdm)
1235 return dcp::DecryptedKDM (kdm, Config::instance()->decryption_chain()->key().get());
1236 } catch (dcp::KDMDecryptionError& e) {
1237 /* Try to flesh out the error a bit */
1238 string const kdm_subject_name = kdm.recipient_x509_subject_name();
1239 bool on_chain = false;
1240 shared_ptr<const dcp::CertificateChain> dc = Config::instance()->decryption_chain();
1241 BOOST_FOREACH (dcp::Certificate i, dc->root_to_leaf()) {
1242 if (i.subject() == kdm_subject_name) {
1247 throw KDMError (_("This KDM was not made for DCP-o-matic's decryption certificate."), e.what());
1248 } else if (on_chain && kdm_subject_name != dc->leaf().subject()) {
1249 throw KDMError (_("This KDM was made for DCP-o-matic but not for its leaf certificate."), e.what());
1257 boost::filesystem::path
1258 default_font_file ()
1260 boost::filesystem::path liberation_normal;
1262 liberation_normal = shared_path() / "LiberationSans-Regular.ttf";
1263 if (!boost::filesystem::exists (liberation_normal)) {
1264 /* Hack for unit tests */
1265 liberation_normal = shared_path() / "fonts" / "LiberationSans-Regular.ttf";
1267 } catch (boost::filesystem::filesystem_error& e) {
1271 if (!boost::filesystem::exists(liberation_normal)) {
1272 liberation_normal = "/usr/share/fonts/truetype/liberation/LiberationSans-Regular.ttf";
1275 return liberation_normal;