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.
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/thread.hpp>
41 #include <boost/filesystem.hpp>
42 #ifdef DCPOMATIC_WINDOWS
43 #include <boost/locale.hpp>
47 #include <pangomm/init.h>
48 #include <magick/MagickCore.h>
49 #include <magick/version.h>
50 #include <dcp/version.h>
52 #include <dcp/signer_chain.h>
53 #include <dcp/signer.h>
54 #include <dcp/raw_convert.h>
56 #include <libavcodec/avcodec.h>
57 #include <libavformat/avformat.h>
58 #include <libswscale/swscale.h>
59 #include <libavfilter/avfiltergraph.h>
60 #include <libavutil/pixfmt.h>
63 #include "exceptions.h"
65 #include "dcp_content_type.h"
67 #include "cinema_sound_processor.h"
72 #include "video_content.h"
74 #include "md5_digester.h"
75 #include "audio_processor.h"
76 #ifdef DCPOMATIC_WINDOWS
83 using std::stringstream;
97 using std::numeric_limits;
100 using std::bad_alloc;
101 using std::streampos;
102 using std::set_terminate;
103 using boost::shared_ptr;
105 using boost::optional;
107 using dcp::raw_convert;
109 static boost::thread::id ui_thread;
110 static boost::filesystem::path backtrace_file;
112 /** Convert some number of seconds to a string representation
113 * in hours, minutes and seconds.
116 * @return String of the form H:M:S (where H is hours, M
117 * is minutes and S is seconds).
120 seconds_to_hms (int s)
130 hms << std::setfill ('0') << m << N_(":");
132 hms << std::setfill ('0') << s;
137 /** @param s Number of seconds.
138 * @return String containing an approximate description of s (e.g. "about 2 hours")
141 seconds_to_approximate_hms (int s)
152 ap << (h + 1) << N_(" ") << _("hours");
155 ap << N_("1 ") << _("hour");
157 ap << h << N_(" ") << _("hours");
162 ap << N_("1 ") << _("minute");
164 ap << m << N_(" ") << _("minutes");
167 ap << s << N_(" ") << _("seconds");
173 #ifdef DCPOMATIC_POSIX
174 /** @param l Mangled C++ identifier.
175 * @return Demangled version.
180 string::size_type const b = l.find_first_of (N_("("));
181 if (b == string::npos) {
185 string::size_type const p = l.find_last_of (N_("+"));
186 if (p == string::npos) {
194 string const fn = l.substr (b + 1, p - b - 1);
199 char* realname = abi::__cxa_demangle (fn.c_str(), 0, 0, &status);
204 } catch (std::exception) {
211 /** Write a stacktrace to an ostream.
212 * @param out Stream to write to.
213 * @param levels Number of levels to go up the call stack.
216 stacktrace (ostream& out, int levels)
219 size_t size = backtrace (array, 200);
220 char** strings = backtrace_symbols (array, size);
223 for (size_t i = 0; i < size && (levels == 0 || i < size_t(levels)); i++) {
224 out << N_(" ") << demangle (strings[i]) << "\n";
232 /** @param v Version as used by FFmpeg.
233 * @return A string representation of v.
236 ffmpeg_version_to_string (int v)
239 s << ((v & 0xff0000) >> 16) << N_(".") << ((v & 0xff00) >> 8) << N_(".") << (v & 0xff);
244 seconds (struct timeval t)
246 return t.tv_sec + (double (t.tv_usec) / 1e6);
249 #ifdef DCPOMATIC_WINDOWS
250 LONG WINAPI exception_handler(struct _EXCEPTION_POINTERS *)
253 FILE* f = fopen_boost (backtrace_file, "w");
254 fprintf (f, "Exception thrown:");
255 for (dbg::stack::const_iterator i = s.begin(); i != s.end(); ++i) {
256 fprintf (f, "%p %s %d %s\n", i->instruction, i->function.c_str(), i->line, i->module.c_str());
259 return EXCEPTION_CONTINUE_SEARCH;
263 /* From http://stackoverflow.com/questions/2443135/how-do-i-find-where-an-exception-was-thrown-in-c */
267 static bool tried_throw = false;
270 // try once to re-throw currently active exception
276 catch (const std::exception &e) {
277 std::cerr << __FUNCTION__ << " caught unhandled exception. what(): "
278 << e.what() << std::endl;
281 std::cerr << __FUNCTION__ << " caught unknown/unhandled exception."
285 #ifdef DCPOMATIC_POSIX
286 stacktrace (cout, 50);
291 /** Call the required functions to set up DCP-o-matic's static arrays, etc.
292 * Must be called from the UI thread, if there is one.
297 #ifdef DCPOMATIC_WINDOWS
298 backtrace_file /= g_get_user_config_dir ();
299 backtrace_file /= "backtrace.txt";
300 SetUnhandledExceptionFilter(exception_handler);
302 /* Dark voodoo which, I think, gets boost::filesystem::path to
303 correctly convert UTF-8 strings to paths, and also paths
304 back to UTF-8 strings (on path::string()).
306 After this, constructing boost::filesystem::paths from strings
307 converts from UTF-8 to UTF-16 inside the path. Then
308 path::string().c_str() gives UTF-8 and
309 path::c_str() gives UTF-16.
311 This is all Windows-only. AFAICT Linux/OS X use UTF-8 everywhere,
312 so things are much simpler.
314 std::locale::global (boost::locale::generator().generate (""));
315 boost::filesystem::path::imbue (std::locale ());
318 avfilter_register_all ();
321 /* Add our lib directory to the libltdl search path so that
322 xmlsec can find xmlsec1-openssl.
324 boost::filesystem::path lib = app_contents ();
326 setenv ("LTDL_LIBRARY_PATH", lib.c_str (), 1);
329 set_terminate (terminate);
334 Ratio::setup_ratios ();
335 VideoContentScale::setup_scales ();
336 DCPContentType::setup_dcp_content_types ();
337 Scaler::setup_scalers ();
338 Filter::setup_filters ();
339 CinemaSoundProcessor::setup_cinema_sound_processors ();
340 AudioProcessor::setup_audio_processors ();
342 ui_thread = boost::this_thread::get_id ();
345 #ifdef DCPOMATIC_WINDOWS
346 boost::filesystem::path
350 GetModuleFileName (0, buffer, 512 * sizeof(wchar_t));
351 boost::filesystem::path p (buffer);
352 p = p.parent_path ();
353 p = p.parent_path ();
360 dcpomatic_setup_gettext_i18n (string lang)
362 #ifdef DCPOMATIC_POSIX
366 if (!lang.empty ()) {
367 /* Override our environment language; this is essential on
371 snprintf (cmd, sizeof(cmd), "LANGUAGE=%s", lang.c_str ());
373 snprintf (cmd, sizeof(cmd), "LANG=%s", lang.c_str ());
375 snprintf (cmd, sizeof(cmd), "LC_ALL=%s", lang.c_str ());
379 setlocale (LC_ALL, "");
380 textdomain ("libdcpomatic");
382 #ifdef DCPOMATIC_WINDOWS
383 bindtextdomain ("libdcpomatic", mo_path().string().c_str());
384 bind_textdomain_codeset ("libdcpomatic", "UTF8");
387 #ifdef DCPOMATIC_POSIX
388 bindtextdomain ("libdcpomatic", POSIX_LOCALE_PREFIX);
392 /** @param s A string.
393 * @return Parts of the string split at spaces, except when a space is within quotation marks.
396 split_at_spaces_considering_quotes (string s)
399 bool in_quotes = false;
401 for (string::size_type i = 0; i < s.length(); ++i) {
402 if (s[i] == ' ' && !in_quotes) {
405 } else if (s[i] == '"') {
406 in_quotes = !in_quotes;
416 /** @param job Optional job for which to report progress */
418 md5_digest (vector<boost::filesystem::path> files, shared_ptr<Job> job)
420 boost::uintmax_t const buffer_size = 64 * 1024;
421 char buffer[buffer_size];
423 MD5Digester digester;
425 vector<int64_t> sizes;
426 for (size_t i = 0; i < files.size(); ++i) {
427 sizes.push_back (boost::filesystem::file_size (files[i]));
430 for (size_t i = 0; i < files.size(); ++i) {
431 FILE* f = fopen_boost (files[i], "rb");
433 throw OpenFileError (files[i].string());
436 boost::uintmax_t const bytes = boost::filesystem::file_size (files[i]);
437 boost::uintmax_t remaining = bytes;
439 while (remaining > 0) {
440 int const t = min (remaining, buffer_size);
441 fread (buffer, 1, t, f);
442 digester.add (buffer, t);
446 job->set_progress ((float (i) + 1 - float(remaining) / bytes) / files.size ());
453 return digester.get ();
456 /** @param An arbitrary audio frame rate.
457 * @return The appropriate DCP-approved frame rate (48kHz or 96kHz).
460 dcp_audio_frame_rate (int fs)
469 Socket::Socket (int timeout)
470 : _deadline (_io_service)
471 , _socket (_io_service)
475 _deadline.expires_at (boost::posix_time::pos_infin);
487 if (_deadline.expires_at() <= boost::asio::deadline_timer::traits_type::now ()) {
489 _acceptor->cancel ();
493 _deadline.expires_at (boost::posix_time::pos_infin);
496 _deadline.async_wait (boost::bind (&Socket::check, this));
499 /** Blocking connect.
500 * @param endpoint End-point to connect to.
503 Socket::connect (boost::asio::ip::tcp::endpoint endpoint)
505 _deadline.expires_from_now (boost::posix_time::seconds (_timeout));
506 boost::system::error_code ec = boost::asio::error::would_block;
507 _socket.async_connect (endpoint, boost::lambda::var(ec) = boost::lambda::_1);
509 _io_service.run_one();
510 } while (ec == boost::asio::error::would_block);
513 throw NetworkError (String::compose (_("error during async_connect (%1)"), ec.value ()));
516 if (!_socket.is_open ()) {
517 throw NetworkError (_("connect timed out"));
522 Socket::accept (int port)
524 _acceptor = new boost::asio::ip::tcp::acceptor (_io_service, boost::asio::ip::tcp::endpoint (boost::asio::ip::tcp::v4(), port));
526 _deadline.expires_from_now (boost::posix_time::seconds (_timeout));
527 boost::system::error_code ec = boost::asio::error::would_block;
528 _acceptor->async_accept (_socket, boost::lambda::var(ec) = boost::lambda::_1);
530 _io_service.run_one ();
531 } while (ec == boost::asio::error::would_block );
537 throw NetworkError (String::compose (_("error during async_accept (%1)"), ec.value ()));
542 * @param data Buffer to write.
543 * @param size Number of bytes to write.
546 Socket::write (uint8_t const * data, int size)
548 _deadline.expires_from_now (boost::posix_time::seconds (_timeout));
549 boost::system::error_code ec = boost::asio::error::would_block;
551 boost::asio::async_write (_socket, boost::asio::buffer (data, size), boost::lambda::var(ec) = boost::lambda::_1);
554 _io_service.run_one ();
555 } while (ec == boost::asio::error::would_block);
558 throw NetworkError (String::compose (_("error during async_write (%1)"), ec.value ()));
563 Socket::write (uint32_t v)
566 write (reinterpret_cast<uint8_t*> (&v), 4);
570 * @param data Buffer to read to.
571 * @param size Number of bytes to read.
574 Socket::read (uint8_t* data, int size)
576 _deadline.expires_from_now (boost::posix_time::seconds (_timeout));
577 boost::system::error_code ec = boost::asio::error::would_block;
579 boost::asio::async_read (_socket, boost::asio::buffer (data, size), boost::lambda::var(ec) = boost::lambda::_1);
582 _io_service.run_one ();
583 } while (ec == boost::asio::error::would_block);
586 throw NetworkError (String::compose (_("error during async_read (%1)"), ec.value ()));
591 Socket::read_uint32 ()
594 read (reinterpret_cast<uint8_t *> (&v), 4);
598 /** Round a number up to the nearest multiple of another number.
600 * @param s Array of numbers to round, indexed by c.
601 * @param t Multiple to round to.
602 * @return Rounded number.
605 stride_round_up (int c, int const * stride, int t)
607 int const a = stride[c] + (t - 1);
611 /** Read a sequence of key / value pairs from a text stream;
612 * the keys are the first words on the line, and the values are
613 * the remainder of the line following the key. Lines beginning
614 * with # are ignored.
615 * @param s Stream to read.
616 * @return key/value pairs.
618 multimap<string, string>
619 read_key_value (istream &s)
621 multimap<string, string> kv;
624 while (getline (s, line)) {
629 if (line[0] == '#') {
633 if (line[line.size() - 1] == '\r') {
634 line = line.substr (0, line.size() - 1);
637 size_t const s = line.find (' ');
638 if (s == string::npos) {
642 kv.insert (make_pair (line.substr (0, s), line.substr (s + 1)));
649 get_required_string (multimap<string, string> const & kv, string k)
651 if (kv.count (k) > 1) {
652 throw StringError (N_("unexpected multiple keys in key-value set"));
655 multimap<string, string>::const_iterator i = kv.find (k);
657 if (i == kv.end ()) {
658 throw StringError (String::compose (_("missing key %1 in key-value set"), k));
665 get_required_int (multimap<string, string> const & kv, string k)
667 string const v = get_required_string (kv, k);
668 return raw_convert<int> (v);
672 get_required_float (multimap<string, string> const & kv, string k)
674 string const v = get_required_string (kv, k);
675 return raw_convert<float> (v);
679 get_optional_string (multimap<string, string> const & kv, string k)
681 if (kv.count (k) > 1) {
682 throw StringError (N_("unexpected multiple keys in key-value set"));
685 multimap<string, string>::const_iterator i = kv.find (k);
686 if (i == kv.end ()) {
694 get_optional_int (multimap<string, string> const & kv, string k)
696 if (kv.count (k) > 1) {
697 throw StringError (N_("unexpected multiple keys in key-value set"));
700 multimap<string, string>::const_iterator i = kv.find (k);
701 if (i == kv.end ()) {
705 return raw_convert<int> (i->second);
708 /** Trip an assert if the caller is not in the UI thread */
712 assert (boost::this_thread::get_id() == ui_thread);
716 audio_channel_name (int c)
718 assert (MAX_DCP_AUDIO_CHANNELS == 12);
720 /* TRANSLATORS: these are the names of audio channels; Lfe (sub) is the low-frequency
721 enhancement channel (sub-woofer). HI is the hearing-impaired audio track and
722 VI is the visually-impaired audio track (audio describe).
724 string const channels[] = {
731 _("Hearing impaired"),
732 _("Visually impaired"),
735 _("Left rear surround"),
736 _("Right rear surround"),
743 valid_image_file (boost::filesystem::path f)
745 string ext = f.extension().string();
746 transform (ext.begin(), ext.end(), ext.begin(), ::tolower);
747 return (ext == ".tif" || ext == ".tiff" || ext == ".jpg" || ext == ".jpeg" || ext == ".png" || ext == ".bmp" || ext == ".tga" || ext == ".dpx");
751 tidy_for_filename (string f)
754 for (size_t i = 0; i < f.length(); ++i) {
755 if (isalnum (f[i]) || f[i] == '_' || f[i] == '-') {
765 shared_ptr<const dcp::Signer>
768 boost::filesystem::path const sd = Config::instance()->signer_chain_directory ();
770 /* Remake the chain if any of it is missing */
772 list<boost::filesystem::path> files;
773 files.push_back ("ca.self-signed.pem");
774 files.push_back ("intermediate.signed.pem");
775 files.push_back ("leaf.signed.pem");
776 files.push_back ("leaf.key");
778 list<boost::filesystem::path>::const_iterator i = files.begin();
779 while (i != files.end()) {
780 boost::filesystem::path p (sd);
782 if (!boost::filesystem::exists (p)) {
783 boost::filesystem::remove_all (sd);
784 boost::filesystem::create_directories (sd);
785 dcp::make_signer_chain (sd, openssl_path ());
792 dcp::CertificateChain chain;
795 boost::filesystem::path p (sd);
796 p /= "ca.self-signed.pem";
797 chain.add (shared_ptr<dcp::Certificate> (new dcp::Certificate (p)));
801 boost::filesystem::path p (sd);
802 p /= "intermediate.signed.pem";
803 chain.add (shared_ptr<dcp::Certificate> (new dcp::Certificate (p)));
807 boost::filesystem::path p (sd);
808 p /= "leaf.signed.pem";
809 chain.add (shared_ptr<dcp::Certificate> (new dcp::Certificate (p)));
812 boost::filesystem::path signer_key (sd);
813 signer_key /= "leaf.key";
815 return shared_ptr<const dcp::Signer> (new dcp::Signer (chain, signer_key));
819 split_get_request (string url)
822 AWAITING_QUESTION_MARK,
825 } state = AWAITING_QUESTION_MARK;
827 map<string, string> r;
830 for (size_t i = 0; i < url.length(); ++i) {
832 case AWAITING_QUESTION_MARK:
847 r.insert (make_pair (k, v));
857 if (state == VALUE) {
858 r.insert (make_pair (k, v));
865 fit_ratio_within (float ratio, dcp::Size full_frame)
867 if (ratio < full_frame.ratio ()) {
868 return dcp::Size (rint (full_frame.height * ratio), full_frame.height);
871 return dcp::Size (full_frame.width, rint (full_frame.width / ratio));
875 wrapped_av_malloc (size_t s)
877 void* p = av_malloc (s);
885 entities_to_text (string e)
887 boost::algorithm::replace_all (e, "%3A", ":");
888 boost::algorithm::replace_all (e, "%2F", "/");
893 divide_with_round (int64_t a, int64_t b)
895 if (a % b >= (b / 2)) {
896 return (a + b - 1) / b;
902 /** Return a user-readable string summarising the versions of our dependencies */
904 dependency_version_summary ()
907 s << N_("libopenjpeg ") << opj_version () << N_(", ")
908 << N_("libavcodec ") << ffmpeg_version_to_string (avcodec_version()) << N_(", ")
909 << N_("libavfilter ") << ffmpeg_version_to_string (avfilter_version()) << N_(", ")
910 << N_("libavformat ") << ffmpeg_version_to_string (avformat_version()) << N_(", ")
911 << N_("libavutil ") << ffmpeg_version_to_string (avutil_version()) << N_(", ")
912 << N_("libswscale ") << ffmpeg_version_to_string (swscale_version()) << N_(", ")
913 << MagickVersion << N_(", ")
914 << N_("libssh ") << ssh_version (0) << N_(", ")
915 << N_("libdcp ") << dcp::version << N_(" git ") << dcp::git_commit;
920 /** Construct a ScopedTemporary. A temporary filename is decided but the file is not opened
921 * until ::open() is called.
923 ScopedTemporary::ScopedTemporary ()
926 _file = boost::filesystem::temp_directory_path() / boost::filesystem::unique_path ();
929 /** Close and delete the temporary file */
930 ScopedTemporary::~ScopedTemporary ()
933 boost::system::error_code ec;
934 boost::filesystem::remove (_file, ec);
937 /** @return temporary filename */
939 ScopedTemporary::c_str () const
941 return _file.string().c_str ();
944 /** Open the temporary file.
945 * @return File's FILE pointer.
948 ScopedTemporary::open (char const * params)
950 _open = fopen (c_str(), params);
954 /** Close the file */
956 ScopedTemporary::close ()
965 subtitle_period (AVSubtitle const & sub)
967 ContentTime const packet_time = ContentTime::from_seconds (static_cast<double> (sub.pts) / AV_TIME_BASE);
969 ContentTimePeriod period (
970 packet_time + ContentTime::from_seconds (sub.start_display_time / 1e3),
971 packet_time + ContentTime::from_seconds (sub.end_display_time / 1e3)