2 Copyright (C) 2012 Carl Hetherington <cth@carlh.net>
3 Copyright (C) 2000-2007 Paul Davis
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software
17 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21 /** @file src/lib/util.cc
22 * @brief Some utility functions and classes.
31 #ifdef DCPOMATIC_POSIX
35 #include <libssh/libssh.h>
37 #include <boost/algorithm/string.hpp>
38 #include <boost/bind.hpp>
39 #include <boost/lambda/lambda.hpp>
40 #include <boost/lexical_cast.hpp>
41 #include <boost/thread.hpp>
42 #include <boost/filesystem.hpp>
43 #ifdef DCPOMATIC_WINDOWS
44 #include <boost/locale.hpp>
48 #include <openssl/md5.h>
49 #include <magick/MagickCore.h>
50 #include <magick/version.h>
51 #include <libdcp/version.h>
52 #include <libdcp/util.h>
53 #include <libdcp/signer_chain.h>
54 #include <libdcp/signer.h>
56 #include <libavcodec/avcodec.h>
57 #include <libavformat/avformat.h>
58 #include <libswscale/swscale.h>
59 #include <libavfilter/avfiltergraph.h>
60 #include <libpostproc/postprocess.h>
61 #include <libavutil/pixfmt.h>
64 #include "exceptions.h"
66 #include "dcp_content_type.h"
68 #include "sound_processor.h"
73 #ifdef DCPOMATIC_WINDOWS
80 using std::stringstream;
93 using std::numeric_limits;
98 using std::set_terminate;
99 using boost::shared_ptr;
101 using boost::lexical_cast;
102 using boost::optional;
105 static boost::thread::id ui_thread;
106 static boost::filesystem::path backtrace_file;
108 /** Convert some number of seconds to a string representation
109 * in hours, minutes and seconds.
112 * @return String of the form H:M:S (where H is hours, M
113 * is minutes and S is seconds).
116 seconds_to_hms (int s)
126 hms << std::setfill ('0') << m << N_(":");
128 hms << std::setfill ('0') << s;
133 /** @param s Number of seconds.
134 * @return String containing an approximate description of s (e.g. "about 2 hours")
137 seconds_to_approximate_hms (int s)
148 ap << (h + 1) << N_(" ") << _("hours");
151 ap << N_("1 ") << _("hour");
153 ap << h << N_(" ") << _("hours");
158 ap << N_("1 ") << _("minute");
160 ap << m << N_(" ") << _("minutes");
163 ap << s << N_(" ") << _("seconds");
169 #ifdef DCPOMATIC_POSIX
170 /** @param l Mangled C++ identifier.
171 * @return Demangled version.
176 string::size_type const b = l.find_first_of (N_("("));
177 if (b == string::npos) {
181 string::size_type const p = l.find_last_of (N_("+"));
182 if (p == string::npos) {
190 string const fn = l.substr (b + 1, p - b - 1);
195 char* realname = abi::__cxa_demangle (fn.c_str(), 0, 0, &status);
200 } catch (std::exception) {
207 /** Write a stacktrace to an ostream.
208 * @param out Stream to write to.
209 * @param levels Number of levels to go up the call stack.
212 stacktrace (ostream& out, int levels)
215 size_t size = backtrace (array, 200);
216 char** strings = backtrace_symbols (array, size);
219 for (size_t i = 0; i < size && (levels == 0 || i < size_t(levels)); i++) {
220 out << N_(" ") << demangle (strings[i]) << "\n";
228 /** @param v Version as used by FFmpeg.
229 * @return A string representation of v.
232 ffmpeg_version_to_string (int v)
235 s << ((v & 0xff0000) >> 16) << N_(".") << ((v & 0xff00) >> 8) << N_(".") << (v & 0xff);
239 /** Return a user-readable string summarising the versions of our dependencies */
241 dependency_version_summary ()
244 s << N_("libopenjpeg ") << opj_version () << N_(", ")
245 << N_("libavcodec ") << ffmpeg_version_to_string (avcodec_version()) << N_(", ")
246 << N_("libavfilter ") << ffmpeg_version_to_string (avfilter_version()) << N_(", ")
247 << N_("libavformat ") << ffmpeg_version_to_string (avformat_version()) << N_(", ")
248 << N_("libavutil ") << ffmpeg_version_to_string (avutil_version()) << N_(", ")
249 << N_("libpostproc ") << ffmpeg_version_to_string (postproc_version()) << N_(", ")
250 << N_("libswscale ") << ffmpeg_version_to_string (swscale_version()) << N_(", ")
251 << MagickVersion << N_(", ")
252 << N_("libssh ") << ssh_version (0) << N_(", ")
253 << N_("libdcp ") << libdcp::version << N_(" git ") << libdcp::git_commit;
259 seconds (struct timeval t)
261 return t.tv_sec + (double (t.tv_usec) / 1e6);
264 #ifdef DCPOMATIC_WINDOWS
265 LONG WINAPI exception_handler(struct _EXCEPTION_POINTERS *)
268 FILE* f = fopen_boost (backtrace_file, "w");
269 for (dbg::stack::const_iterator i = s.begin(); i != s.end(); ++i) {
270 fprintf (f, "%p %s %d %s", i->instruction, i->function.c_str(), i->line, i->module.c_str());
273 return EXCEPTION_CONTINUE_SEARCH;
277 /* From http://stackoverflow.com/questions/2443135/how-do-i-find-where-an-exception-was-thrown-in-c */
281 static bool tried_throw = false;
284 // try once to re-throw currently active exception
285 if (!tried_throw++) {
289 catch (const std::exception &e) {
290 std::cerr << __FUNCTION__ << " caught unhandled exception. what(): "
291 << e.what() << std::endl;
294 std::cerr << __FUNCTION__ << " caught unknown/unhandled exception."
298 #ifdef DCPOMATIC_POSIX
299 stacktrace (cout, 50);
304 /** Call the required functions to set up DCP-o-matic's static arrays, etc.
305 * Must be called from the UI thread, if there is one.
310 #ifdef DCPOMATIC_WINDOWS
311 backtrace_file /= g_get_user_config_dir ();
312 backtrace_file /= "backtrace.txt";
313 SetUnhandledExceptionFilter(exception_handler);
315 /* Dark voodoo which, I think, gets boost::filesystem::path to
316 correctly convert UTF-8 strings to paths, and also paths
317 back to UTF-8 strings (on path::string()).
319 After this, constructing boost::filesystem::paths from strings
320 converts from UTF-8 to UTF-16 inside the path. Then
321 path::string().c_str() gives UTF-8 and
322 path::c_str() gives UTF-16.
324 This is all Windows-only. AFAICT Linux/OS X use UTF-8 everywhere,
325 so things are much simpler.
327 std::locale::global (boost::locale::generator().generate (""));
328 boost::filesystem::path::imbue (std::locale ());
331 avfilter_register_all ();
334 /* Add our lib directory to the libltdl search path so that
335 xmlsec can find xmlsec1-openssl.
337 boost::filesystem::path lib = app_contents ();
339 setenv ("LTDL_LIBRARY_PATH", lib.c_str (), 1);
342 set_terminate (terminate);
346 Ratio::setup_ratios ();
347 DCPContentType::setup_dcp_content_types ();
348 Scaler::setup_scalers ();
349 Filter::setup_filters ();
350 SoundProcessor::setup_sound_processors ();
352 ui_thread = boost::this_thread::get_id ();
355 #ifdef DCPOMATIC_WINDOWS
356 boost::filesystem::path
360 GetModuleFileName (0, buffer, 512 * sizeof(wchar_t));
361 boost::filesystem::path p (buffer);
362 p = p.parent_path ();
363 p = p.parent_path ();
370 dcpomatic_setup_gettext_i18n (string lang)
372 #ifdef DCPOMATIC_POSIX
376 if (!lang.empty ()) {
377 /* Override our environment language; this is essential on
381 snprintf (cmd, sizeof(cmd), "LANGUAGE=%s", lang.c_str ());
383 snprintf (cmd, sizeof(cmd), "LANG=%s", lang.c_str ());
385 snprintf (cmd, sizeof(cmd), "LC_ALL=%s", lang.c_str ());
389 setlocale (LC_ALL, "");
390 textdomain ("libdcpomatic");
392 #ifdef DCPOMATIC_WINDOWS
393 bindtextdomain ("libdcpomatic", mo_path().string().c_str());
394 bind_textdomain_codeset ("libdcpomatic", "UTF8");
397 #ifdef DCPOMATIC_POSIX
398 bindtextdomain ("libdcpomatic", POSIX_LOCALE_PREFIX);
402 /** @param s A string.
403 * @return Parts of the string split at spaces, except when a space is within quotation marks.
406 split_at_spaces_considering_quotes (string s)
409 bool in_quotes = false;
411 for (string::size_type i = 0; i < s.length(); ++i) {
412 if (s[i] == ' ' && !in_quotes) {
415 } else if (s[i] == '"') {
416 in_quotes = !in_quotes;
427 md5_digest (void const * data, int size)
430 MD5_Init (&md5_context);
431 MD5_Update (&md5_context, data, size);
432 unsigned char digest[MD5_DIGEST_LENGTH];
433 MD5_Final (digest, &md5_context);
436 for (int i = 0; i < MD5_DIGEST_LENGTH; ++i) {
437 s << std::hex << std::setfill('0') << std::setw(2) << ((int) digest[i]);
443 /** @param job Optional job for which to report progress */
445 md5_digest (vector<boost::filesystem::path> files, shared_ptr<Job> job)
447 boost::uintmax_t const buffer_size = 64 * 1024;
448 char buffer[buffer_size];
451 MD5_Init (&md5_context);
453 vector<int64_t> sizes;
454 for (size_t i = 0; i < files.size(); ++i) {
455 sizes.push_back (boost::filesystem::file_size (files[i]));
458 for (size_t i = 0; i < files.size(); ++i) {
459 FILE* f = fopen_boost (files[i], "rb");
461 throw OpenFileError (files[i].string());
464 boost::uintmax_t const bytes = boost::filesystem::file_size (files[i]);
465 boost::uintmax_t remaining = bytes;
467 while (remaining > 0) {
468 int const t = min (remaining, buffer_size);
469 fread (buffer, 1, t, f);
470 MD5_Update (&md5_context, buffer, t);
474 job->set_progress ((float (i) + 1 - float(remaining) / bytes) / files.size ());
481 unsigned char digest[MD5_DIGEST_LENGTH];
482 MD5_Final (digest, &md5_context);
485 for (int i = 0; i < MD5_DIGEST_LENGTH; ++i) {
486 s << std::hex << std::setfill('0') << std::setw(2) << ((int) digest[i]);
493 about_equal (float a, float b)
495 /* A film of F seconds at f FPS will be Ff frames;
496 Consider some delta FPS d, so if we run the same
497 film at (f + d) FPS it will last F(f + d) seconds.
499 Hence the difference in length over the length of the film will
500 be F(f + d) - Ff frames
501 = Ff + Fd - Ff frames
505 So if we accept a difference of 1 frame, ie 1/f seconds, we can
512 So for a 3hr film, ie F = 3 * 60 * 60 = 10800, the acceptable
513 FPS error is 1/F ~= 0.0001 ~= 10-e4
516 return (fabs (a - b) < 1e-4);
519 /** @param An arbitrary audio frame rate.
520 * @return The appropriate DCP-approved frame rate (48kHz or 96kHz).
523 dcp_audio_frame_rate (int fs)
532 Socket::Socket (int timeout)
533 : _deadline (_io_service)
534 , _socket (_io_service)
538 _deadline.expires_at (boost::posix_time::pos_infin);
550 if (_deadline.expires_at() <= boost::asio::deadline_timer::traits_type::now ()) {
552 _acceptor->cancel ();
556 _deadline.expires_at (boost::posix_time::pos_infin);
559 _deadline.async_wait (boost::bind (&Socket::check, this));
562 /** Blocking connect.
563 * @param endpoint End-point to connect to.
566 Socket::connect (boost::asio::ip::tcp::endpoint endpoint)
568 _deadline.expires_from_now (boost::posix_time::seconds (_timeout));
569 boost::system::error_code ec = boost::asio::error::would_block;
570 _socket.async_connect (endpoint, boost::lambda::var(ec) = boost::lambda::_1);
572 _io_service.run_one();
573 } while (ec == boost::asio::error::would_block);
576 throw NetworkError (String::compose (_("error during async_connect (%1)"), ec.value ()));
579 if (!_socket.is_open ()) {
580 throw NetworkError (_("connect timed out"));
585 Socket::accept (int port)
587 _acceptor = new boost::asio::ip::tcp::acceptor (_io_service, boost::asio::ip::tcp::endpoint (boost::asio::ip::tcp::v4(), port));
589 _deadline.expires_from_now (boost::posix_time::seconds (_timeout));
590 boost::system::error_code ec = boost::asio::error::would_block;
591 _acceptor->async_accept (_socket, boost::lambda::var(ec) = boost::lambda::_1);
593 _io_service.run_one ();
594 } while (ec == boost::asio::error::would_block );
600 throw NetworkError (String::compose (_("error during async_accept (%1)"), ec.value ()));
605 * @param data Buffer to write.
606 * @param size Number of bytes to write.
609 Socket::write (uint8_t const * data, int size)
611 _deadline.expires_from_now (boost::posix_time::seconds (_timeout));
612 boost::system::error_code ec = boost::asio::error::would_block;
614 boost::asio::async_write (_socket, boost::asio::buffer (data, size), boost::lambda::var(ec) = boost::lambda::_1);
617 _io_service.run_one ();
618 } while (ec == boost::asio::error::would_block);
621 throw NetworkError (String::compose (_("error during async_write (%1)"), ec.value ()));
626 Socket::write (uint32_t v)
629 write (reinterpret_cast<uint8_t*> (&v), 4);
633 * @param data Buffer to read to.
634 * @param size Number of bytes to read.
637 Socket::read (uint8_t* data, int size)
639 _deadline.expires_from_now (boost::posix_time::seconds (_timeout));
640 boost::system::error_code ec = boost::asio::error::would_block;
642 boost::asio::async_read (_socket, boost::asio::buffer (data, size), boost::lambda::var(ec) = boost::lambda::_1);
645 _io_service.run_one ();
646 } while (ec == boost::asio::error::would_block);
649 throw NetworkError (String::compose (_("error during async_read (%1)"), ec.value ()));
654 Socket::read_uint32 ()
657 read (reinterpret_cast<uint8_t *> (&v), 4);
661 /** Round a number up to the nearest multiple of another number.
663 * @param s Array of numbers to round, indexed by c.
664 * @param t Multiple to round to.
665 * @return Rounded number.
668 stride_round_up (int c, int const * stride, int t)
670 int const a = stride[c] + (t - 1);
674 /** Read a sequence of key / value pairs from a text stream;
675 * the keys are the first words on the line, and the values are
676 * the remainder of the line following the key. Lines beginning
677 * with # are ignored.
678 * @param s Stream to read.
679 * @return key/value pairs.
681 multimap<string, string>
682 read_key_value (istream &s)
684 multimap<string, string> kv;
687 while (getline (s, line)) {
692 if (line[0] == '#') {
696 if (line[line.size() - 1] == '\r') {
697 line = line.substr (0, line.size() - 1);
700 size_t const s = line.find (' ');
701 if (s == string::npos) {
705 kv.insert (make_pair (line.substr (0, s), line.substr (s + 1)));
712 get_required_string (multimap<string, string> const & kv, string k)
714 if (kv.count (k) > 1) {
715 throw StringError (N_("unexpected multiple keys in key-value set"));
718 multimap<string, string>::const_iterator i = kv.find (k);
720 if (i == kv.end ()) {
721 throw StringError (String::compose (_("missing key %1 in key-value set"), k));
728 get_required_int (multimap<string, string> const & kv, string k)
730 string const v = get_required_string (kv, k);
731 return lexical_cast<int> (v);
735 get_required_float (multimap<string, string> const & kv, string k)
737 string const v = get_required_string (kv, k);
738 return lexical_cast<float> (v);
742 get_optional_string (multimap<string, string> const & kv, string k)
744 if (kv.count (k) > 1) {
745 throw StringError (N_("unexpected multiple keys in key-value set"));
748 multimap<string, string>::const_iterator i = kv.find (k);
749 if (i == kv.end ()) {
757 get_optional_int (multimap<string, string> const & kv, string k)
759 if (kv.count (k) > 1) {
760 throw StringError (N_("unexpected multiple keys in key-value set"));
763 multimap<string, string>::const_iterator i = kv.find (k);
764 if (i == kv.end ()) {
768 return lexical_cast<int> (i->second);
771 /** Trip an assert if the caller is not in the UI thread */
775 assert (boost::this_thread::get_id() == ui_thread);
778 /** @param v Content video frame.
779 * @param audio_sample_rate Source audio sample rate.
780 * @param frames_per_second Number of video frames per second.
781 * @return Equivalent number of audio frames for `v'.
784 video_frames_to_audio_frames (VideoContent::Frame v, float audio_sample_rate, float frames_per_second)
786 return ((int64_t) v * audio_sample_rate / frames_per_second);
790 audio_channel_name (int c)
792 assert (MAX_AUDIO_CHANNELS == 6);
794 /* TRANSLATORS: these are the names of audio channels; Lfe (sub) is the low-frequency
795 enhancement channel (sub-woofer).
797 string const channels[] = {
809 FrameRateConversion::FrameRateConversion (float source, int dcp)
812 , change_speed (false)
814 if (fabs (source / 2.0 - dcp) < fabs (source - dcp)) {
815 /* The difference between source and DCP frame rate will be lower
816 (i.e. better) if we skip.
819 } else if (fabs (source * 2 - dcp) < fabs (source - dcp)) {
820 /* The difference between source and DCP frame rate would be better
821 if we repeated each frame once; it may be better still if we
822 repeated more than once. Work out the required repeat.
824 repeat = round (dcp / source);
827 change_speed = !about_equal (source * factor(), dcp);
829 if (!skip && repeat == 1 && !change_speed) {
830 description = _("Content and DCP have the same rate.\n");
833 description = _("DCP will use every other frame of the content.\n");
834 } else if (repeat == 2) {
835 description = _("Each content frame will be doubled in the DCP.\n");
836 } else if (repeat > 2) {
837 description = String::compose (_("Each content frame will be repeated %1 more times in the DCP.\n"), repeat - 1);
841 float const pc = dcp * 100 / (source * factor());
842 description += String::compose (_("DCP will run at %1%% of the content speed.\n"), pc);
847 LocaleGuard::LocaleGuard ()
850 char const * old = setlocale (LC_NUMERIC, 0);
854 if (strcmp (_old, "C")) {
855 setlocale (LC_NUMERIC, "C");
860 LocaleGuard::~LocaleGuard ()
862 setlocale (LC_NUMERIC, _old);
867 valid_image_file (boost::filesystem::path f)
869 string ext = f.extension().string();
870 transform (ext.begin(), ext.end(), ext.begin(), ::tolower);
871 return (ext == ".tif" || ext == ".tiff" || ext == ".jpg" || ext == ".jpeg" || ext == ".png" || ext == ".bmp" || ext == ".tga");
875 tidy_for_filename (string f)
878 for (size_t i = 0; i < f.length(); ++i) {
879 if (isalnum (f[i]) || f[i] == '_' || f[i] == '-') {
889 shared_ptr<const libdcp::Signer>
892 boost::filesystem::path const sd = Config::instance()->signer_chain_directory ();
894 /* Remake the chain if any of it is missing */
896 list<boost::filesystem::path> files;
897 files.push_back ("ca.self-signed.pem");
898 files.push_back ("intermediate.signed.pem");
899 files.push_back ("leaf.signed.pem");
900 files.push_back ("leaf.key");
902 list<boost::filesystem::path>::const_iterator i = files.begin();
903 while (i != files.end()) {
904 boost::filesystem::path p (sd);
906 if (!boost::filesystem::exists (p)) {
907 boost::filesystem::remove_all (sd);
908 boost::filesystem::create_directories (sd);
909 libdcp::make_signer_chain (sd, openssl_path ());
916 libdcp::CertificateChain chain;
919 boost::filesystem::path p (sd);
920 p /= "ca.self-signed.pem";
921 chain.add (shared_ptr<libdcp::Certificate> (new libdcp::Certificate (p)));
925 boost::filesystem::path p (sd);
926 p /= "intermediate.signed.pem";
927 chain.add (shared_ptr<libdcp::Certificate> (new libdcp::Certificate (p)));
931 boost::filesystem::path p (sd);
932 p /= "leaf.signed.pem";
933 chain.add (shared_ptr<libdcp::Certificate> (new libdcp::Certificate (p)));
936 boost::filesystem::path signer_key (sd);
937 signer_key /= "leaf.key";
939 return shared_ptr<const libdcp::Signer> (new libdcp::Signer (chain, signer_key));
943 fit_ratio_within (float ratio, libdcp::Size full_frame)
945 if (ratio < full_frame.ratio ()) {
946 return libdcp::Size (rint (full_frame.height * ratio), full_frame.height);
949 return libdcp::Size (full_frame.width, rint (full_frame.width / ratio));
953 wrapped_av_malloc (size_t s)
955 void* p = av_malloc (s);