2 Copyright (C) 2012-2014 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.
26 #include "exceptions.h"
28 #include "dcp_content_type.h"
30 #include "cinema_sound_processor.h"
35 #include "video_content.h"
37 #include "md5_digester.h"
38 #include "audio_processor.h"
39 #include "safe_stringstream.h"
40 #ifdef DCPOMATIC_WINDOWS
43 #include <dcp/version.h>
45 #include <dcp/signer.h>
46 #include <dcp/raw_convert.h>
48 #include <libavcodec/avcodec.h>
49 #include <libavformat/avformat.h>
50 #include <libswscale/swscale.h>
51 #include <libavfilter/avfiltergraph.h>
52 #include <libavutil/pixfmt.h>
56 #include <pangomm/init.h>
57 #ifdef DCPOMATIC_IMAGE_MAGICK
58 #include <magick/MagickCore.h>
60 #include <magick/common.h>
61 #include <magick/magick_config.h>
63 #include <magick/version.h>
64 #include <libssh/libssh.h>
65 #include <boost/algorithm/string.hpp>
66 #include <boost/bind.hpp>
67 #include <boost/lambda/lambda.hpp>
68 #include <boost/thread.hpp>
69 #include <boost/filesystem.hpp>
70 #ifdef DCPOMATIC_WINDOWS
71 #include <boost/locale.hpp>
79 #ifdef DCPOMATIC_POSIX
99 using std::set_terminate;
100 using boost::shared_ptr;
102 using boost::optional;
104 using dcp::raw_convert;
106 static boost::thread::id ui_thread;
107 static boost::filesystem::path backtrace_file;
109 /** Convert some number of seconds to a string representation
110 * in hours, minutes and seconds.
113 * @return String of the form H:M:S (where H is hours, M
114 * is minutes and S is seconds).
117 seconds_to_hms (int s)
124 SafeStringStream hms;
127 hms << setfill ('0') << m << N_(":");
129 hms << setfill ('0') << s;
134 /** @param s Number of seconds.
135 * @return String containing an approximate description of s (e.g. "about 2 hours")
138 seconds_to_approximate_hms (int s)
147 bool const hours = h > 0;
148 bool const minutes = h < 10 && m > 0;
149 bool const seconds = m < 10 && s > 0;
152 if (m > 30 && !minutes) {
153 /// TRANSLATORS: h here is an abbreviation for hours
154 ap << (h + 1) << _("h");
156 /// TRANSLATORS: h here is an abbreviation for hours
160 if (minutes | seconds) {
167 if (s > 30 && !seconds) {
168 /// TRANSLATORS: m here is an abbreviation for minutes
169 ap << (m + 1) << _("m");
171 /// TRANSLATORS: m here is an abbreviation for minutes
182 /// TRANSLATORS: s here is an abbreviation for seconds
189 #ifdef DCPOMATIC_POSIX
190 /** @param l Mangled C++ identifier.
191 * @return Demangled version.
196 string::size_type const b = l.find_first_of (N_("("));
197 if (b == string::npos) {
201 string::size_type const p = l.find_last_of (N_("+"));
202 if (p == string::npos) {
210 string const fn = l.substr (b + 1, p - b - 1);
215 char* realname = abi::__cxa_demangle (fn.c_str(), 0, 0, &status);
220 } catch (std::exception) {
227 /** Write a stacktrace to an ostream.
228 * @param out Stream to write to.
229 * @param levels Number of levels to go up the call stack.
232 stacktrace (ostream& out, int levels)
235 size_t size = backtrace (array, 200);
236 char** strings = backtrace_symbols (array, size);
239 for (size_t i = 0; i < size && (levels == 0 || i < size_t(levels)); i++) {
240 out << N_(" ") << demangle (strings[i]) << "\n";
248 /** @param v Version as used by FFmpeg.
249 * @return A string representation of v.
252 ffmpeg_version_to_string (int v)
255 s << ((v & 0xff0000) >> 16) << N_(".") << ((v & 0xff00) >> 8) << N_(".") << (v & 0xff);
260 seconds (struct timeval t)
262 return t.tv_sec + (double (t.tv_usec) / 1e6);
265 #ifdef DCPOMATIC_WINDOWS
266 LONG WINAPI exception_handler(struct _EXCEPTION_POINTERS *)
269 FILE* f = fopen_boost (backtrace_file, "w");
270 fprintf (f, "Exception thrown:");
271 for (dbg::stack::const_iterator i = s.begin(); i != s.end(); ++i) {
272 fprintf (f, "%p %s %d %s\n", i->instruction, i->function.c_str(), i->line, i->module.c_str());
275 return EXCEPTION_CONTINUE_SEARCH;
280 set_backtrace_file (boost::filesystem::path p)
285 /* From http://stackoverflow.com/questions/2443135/how-do-i-find-where-an-exception-was-thrown-in-c */
289 static bool tried_throw = false;
292 // try once to re-throw currently active exception
298 catch (const std::exception &e) {
299 std::cerr << __FUNCTION__ << " caught unhandled exception. what(): "
300 << e.what() << std::endl;
303 std::cerr << __FUNCTION__ << " caught unknown/unhandled exception."
307 #ifdef DCPOMATIC_POSIX
308 stacktrace (cout, 50);
313 /** Call the required functions to set up DCP-o-matic's static arrays, etc.
314 * Must be called from the UI thread, if there is one.
319 #ifdef DCPOMATIC_WINDOWS
320 boost::filesystem::path p = g_get_user_config_dir ();
321 p /= "backtrace.txt";
322 set_backtrace_file (p);
323 SetUnhandledExceptionFilter(exception_handler);
325 /* Dark voodoo which, I think, gets boost::filesystem::path to
326 correctly convert UTF-8 strings to paths, and also paths
327 back to UTF-8 strings (on path::string()).
329 After this, constructing boost::filesystem::paths from strings
330 converts from UTF-8 to UTF-16 inside the path. Then
331 path::string().c_str() gives UTF-8 and
332 path::c_str() gives UTF-16.
334 This is all Windows-only. AFAICT Linux/OS X use UTF-8 everywhere,
335 so things are much simpler.
337 std::locale::global (boost::locale::generator().generate (""));
338 boost::filesystem::path::imbue (std::locale ());
341 avfilter_register_all ();
344 /* Add our lib directory to the libltdl search path so that
345 xmlsec can find xmlsec1-openssl.
347 boost::filesystem::path lib = app_contents ();
349 setenv ("LTDL_LIBRARY_PATH", lib.c_str (), 1);
352 set_terminate (terminate);
357 Ratio::setup_ratios ();
358 VideoContentScale::setup_scales ();
359 DCPContentType::setup_dcp_content_types ();
360 Scaler::setup_scalers ();
361 Filter::setup_filters ();
362 CinemaSoundProcessor::setup_cinema_sound_processors ();
363 AudioProcessor::setup_audio_processors ();
365 ui_thread = boost::this_thread::get_id ();
368 #ifdef DCPOMATIC_WINDOWS
369 boost::filesystem::path
373 GetModuleFileName (0, buffer, 512 * sizeof(wchar_t));
374 boost::filesystem::path p (buffer);
375 p = p.parent_path ();
376 p = p.parent_path ();
383 boost::filesystem::path
386 return "DCP-o-matic 2.app/Contents/Resources";
391 dcpomatic_setup_gettext_i18n (string lang)
393 #ifdef DCPOMATIC_LINUX
397 if (!lang.empty ()) {
398 /* Override our environment language. Note that the caller must not
399 free the string passed into putenv().
401 string s = String::compose ("LANGUAGE=%1", lang);
402 putenv (strdup (s.c_str ()));
403 s = String::compose ("LANG=%1", lang);
404 putenv (strdup (s.c_str ()));
405 s = String::compose ("LC_ALL=%1", lang);
406 putenv (strdup (s.c_str ()));
409 setlocale (LC_ALL, "");
410 textdomain ("libdcpomatic");
412 #if defined(DCPOMATIC_WINDOWS) || defined(DCPOMATIC_OSX)
413 bindtextdomain ("libdcpomatic", mo_path().string().c_str());
414 bind_textdomain_codeset ("libdcpomatic", "UTF8");
417 #ifdef DCPOMATIC_LINUX
418 bindtextdomain ("libdcpomatic", POSIX_LOCALE_PREFIX);
422 /** @param s A string.
423 * @return Parts of the string split at spaces, except when a space is within quotation marks.
426 split_at_spaces_considering_quotes (string s)
429 bool in_quotes = false;
431 for (string::size_type i = 0; i < s.length(); ++i) {
432 if (s[i] == ' ' && !in_quotes) {
435 } else if (s[i] == '"') {
436 in_quotes = !in_quotes;
446 /** @param job Optional job for which to report progress */
448 md5_digest (vector<boost::filesystem::path> files, shared_ptr<Job> job)
450 boost::uintmax_t const buffer_size = 64 * 1024;
451 char buffer[buffer_size];
453 MD5Digester digester;
455 vector<int64_t> sizes;
456 for (size_t i = 0; i < files.size(); ++i) {
457 sizes.push_back (boost::filesystem::file_size (files[i]));
460 for (size_t i = 0; i < files.size(); ++i) {
461 FILE* f = fopen_boost (files[i], "rb");
463 throw OpenFileError (files[i].string());
466 boost::uintmax_t const bytes = boost::filesystem::file_size (files[i]);
467 boost::uintmax_t remaining = bytes;
469 while (remaining > 0) {
470 int const t = min (remaining, buffer_size);
471 int const r = fread (buffer, 1, t, f);
473 throw ReadFileError (files[i], errno);
475 digester.add (buffer, t);
479 job->set_progress ((float (i) + 1 - float(remaining) / bytes) / files.size ());
486 return digester.get ();
489 /** @param An arbitrary audio frame rate.
490 * @return The appropriate DCP-approved frame rate (48kHz or 96kHz).
493 dcp_audio_frame_rate (int fs)
502 Socket::Socket (int timeout)
503 : _deadline (_io_service)
504 , _socket (_io_service)
508 _deadline.expires_at (boost::posix_time::pos_infin);
520 if (_deadline.expires_at() <= boost::asio::deadline_timer::traits_type::now ()) {
522 _acceptor->cancel ();
526 _deadline.expires_at (boost::posix_time::pos_infin);
529 _deadline.async_wait (boost::bind (&Socket::check, this));
532 /** Blocking connect.
533 * @param endpoint End-point to connect to.
536 Socket::connect (boost::asio::ip::tcp::endpoint endpoint)
538 _deadline.expires_from_now (boost::posix_time::seconds (_timeout));
539 boost::system::error_code ec = boost::asio::error::would_block;
540 _socket.async_connect (endpoint, boost::lambda::var(ec) = boost::lambda::_1);
542 _io_service.run_one();
543 } while (ec == boost::asio::error::would_block);
546 throw NetworkError (String::compose (_("error during async_connect (%1)"), ec.value ()));
549 if (!_socket.is_open ()) {
550 throw NetworkError (_("connect timed out"));
555 Socket::accept (int port)
557 _acceptor = new boost::asio::ip::tcp::acceptor (_io_service, boost::asio::ip::tcp::endpoint (boost::asio::ip::tcp::v4(), port));
559 _deadline.expires_from_now (boost::posix_time::seconds (_timeout));
560 boost::system::error_code ec = boost::asio::error::would_block;
561 _acceptor->async_accept (_socket, boost::lambda::var(ec) = boost::lambda::_1);
563 _io_service.run_one ();
564 } while (ec == boost::asio::error::would_block);
570 throw NetworkError (String::compose (_("error during async_accept (%1)"), ec.value ()));
575 * @param data Buffer to write.
576 * @param size Number of bytes to write.
579 Socket::write (uint8_t const * data, int size)
581 _deadline.expires_from_now (boost::posix_time::seconds (_timeout));
582 boost::system::error_code ec = boost::asio::error::would_block;
584 boost::asio::async_write (_socket, boost::asio::buffer (data, size), boost::lambda::var(ec) = boost::lambda::_1);
587 _io_service.run_one ();
588 } while (ec == boost::asio::error::would_block);
591 throw NetworkError (String::compose (_("error during async_write (%1)"), ec.value ()));
596 Socket::write (uint32_t v)
599 write (reinterpret_cast<uint8_t*> (&v), 4);
603 * @param data Buffer to read to.
604 * @param size Number of bytes to read.
607 Socket::read (uint8_t* data, int size)
609 _deadline.expires_from_now (boost::posix_time::seconds (_timeout));
610 boost::system::error_code ec = boost::asio::error::would_block;
612 boost::asio::async_read (_socket, boost::asio::buffer (data, size), boost::lambda::var(ec) = boost::lambda::_1);
615 _io_service.run_one ();
616 } while (ec == boost::asio::error::would_block);
619 throw NetworkError (String::compose (_("error during async_read (%1)"), ec.value ()));
624 Socket::read_uint32 ()
627 read (reinterpret_cast<uint8_t *> (&v), 4);
631 /** Round a number up to the nearest multiple of another number.
633 * @param s Array of numbers to round, indexed by c.
634 * @param t Multiple to round to.
635 * @return Rounded number.
638 stride_round_up (int c, int const * stride, int t)
640 int const a = stride[c] + (t - 1);
644 /** @param n A number.
645 * @param r Rounding `boundary' (must be a power of 2)
646 * @return n rounded to the nearest r
649 round_to (float n, int r)
651 assert (r == 1 || r == 2 || r == 4);
652 return int (n + float(r) / 2) &~ (r - 1);
655 /** Read a sequence of key / value pairs from a text stream;
656 * the keys are the first words on the line, and the values are
657 * the remainder of the line following the key. Lines beginning
658 * with # are ignored.
659 * @param s Stream to read.
660 * @return key/value pairs.
662 multimap<string, string>
663 read_key_value (istream &s)
665 multimap<string, string> kv;
668 while (getline (s, line)) {
673 if (line[0] == '#') {
677 if (line[line.size() - 1] == '\r') {
678 line = line.substr (0, line.size() - 1);
681 size_t const s = line.find (' ');
682 if (s == string::npos) {
686 kv.insert (make_pair (line.substr (0, s), line.substr (s + 1)));
693 get_required_string (multimap<string, string> const & kv, string k)
695 if (kv.count (k) > 1) {
696 throw StringError (N_("unexpected multiple keys in key-value set"));
699 multimap<string, string>::const_iterator i = kv.find (k);
701 if (i == kv.end ()) {
702 throw StringError (String::compose (_("missing key %1 in key-value set"), k));
709 get_required_int (multimap<string, string> const & kv, string k)
711 string const v = get_required_string (kv, k);
712 return raw_convert<int> (v);
716 get_required_float (multimap<string, string> const & kv, string k)
718 string const v = get_required_string (kv, k);
719 return raw_convert<float> (v);
723 get_optional_string (multimap<string, string> const & kv, string k)
725 if (kv.count (k) > 1) {
726 throw StringError (N_("unexpected multiple keys in key-value set"));
729 multimap<string, string>::const_iterator i = kv.find (k);
730 if (i == kv.end ()) {
738 get_optional_int (multimap<string, string> const & kv, string k)
740 if (kv.count (k) > 1) {
741 throw StringError (N_("unexpected multiple keys in key-value set"));
744 multimap<string, string>::const_iterator i = kv.find (k);
745 if (i == kv.end ()) {
749 return raw_convert<int> (i->second);
752 /** Trip an assert if the caller is not in the UI thread */
756 assert (boost::this_thread::get_id() == ui_thread);
760 audio_channel_name (int c)
762 assert (MAX_DCP_AUDIO_CHANNELS == 12);
764 /// TRANSLATORS: these are the names of audio channels; Lfe (sub) is the low-frequency
765 /// enhancement channel (sub-woofer). HI is the hearing-impaired audio track and
766 /// VI is the visually-impaired audio track (audio describe).
767 string const channels[] = {
774 _("Hearing impaired"),
775 _("Visually impaired"),
778 _("Left rear surround"),
779 _("Right rear surround"),
786 valid_image_file (boost::filesystem::path f)
788 string ext = f.extension().string();
789 transform (ext.begin(), ext.end(), ext.begin(), ::tolower);
791 ext == ".tif" || ext == ".tiff" || ext == ".jpg" || ext == ".jpeg" ||
792 ext == ".png" || ext == ".bmp" || ext == ".tga" || ext == ".dpx" ||
793 ext == ".j2c" || ext == ".j2k"
798 valid_j2k_file (boost::filesystem::path f)
800 string ext = f.extension().string();
801 transform (ext.begin(), ext.end(), ext.begin(), ::tolower);
802 return (ext == ".j2k" || ext == ".j2c");
806 tidy_for_filename (string f)
809 for (size_t i = 0; i < f.length(); ++i) {
810 if (isalnum (f[i]) || f[i] == '_' || f[i] == '-') {
821 fit_ratio_within (float ratio, dcp::Size full_frame, int round)
823 if (ratio < full_frame.ratio ()) {
824 return dcp::Size (round_to (full_frame.height * ratio, round), full_frame.height);
827 return dcp::Size (full_frame.width, round_to (full_frame.width / ratio, round));
831 wrapped_av_malloc (size_t s)
833 void* p = av_malloc (s);
841 entities_to_text (string e)
843 boost::algorithm::replace_all (e, "%3A", ":");
844 boost::algorithm::replace_all (e, "%2F", "/");
849 divide_with_round (int64_t a, int64_t b)
851 if (a % b >= (b / 2)) {
852 return (a + b - 1) / b;
858 /** Return a user-readable string summarising the versions of our dependencies */
860 dependency_version_summary ()
863 s << N_("libopenjpeg ") << opj_version () << N_(", ")
864 << N_("libavcodec ") << ffmpeg_version_to_string (avcodec_version()) << N_(", ")
865 << N_("libavfilter ") << ffmpeg_version_to_string (avfilter_version()) << N_(", ")
866 << N_("libavformat ") << ffmpeg_version_to_string (avformat_version()) << N_(", ")
867 << N_("libavutil ") << ffmpeg_version_to_string (avutil_version()) << N_(", ")
868 << N_("libswscale ") << ffmpeg_version_to_string (swscale_version()) << N_(", ")
869 << MagickVersion << N_(", ")
870 << N_("libssh ") << ssh_version (0) << N_(", ")
871 << N_("libdcp ") << dcp::version << N_(" git ") << dcp::git_commit;
876 /** Construct a ScopedTemporary. A temporary filename is decided but the file is not opened
877 * until ::open() is called.
879 ScopedTemporary::ScopedTemporary ()
882 _file = boost::filesystem::temp_directory_path() / boost::filesystem::unique_path ();
885 /** Close and delete the temporary file */
886 ScopedTemporary::~ScopedTemporary ()
889 boost::system::error_code ec;
890 boost::filesystem::remove (_file, ec);
893 /** @return temporary filename */
895 ScopedTemporary::c_str () const
897 return _file.string().c_str ();
900 /** Open the temporary file.
901 * @return File's FILE pointer.
904 ScopedTemporary::open (char const * params)
906 _open = fopen (c_str(), params);
910 /** Close the file */
912 ScopedTemporary::close ()
921 subtitle_period (AVSubtitle const & sub)
923 ContentTime const packet_time = ContentTime::from_seconds (static_cast<double> (sub.pts) / AV_TIME_BASE);
925 ContentTimePeriod period (
926 packet_time + ContentTime::from_seconds (sub.start_display_time / 1e3),
927 packet_time + ContentTime::from_seconds (sub.end_display_time / 1e3)