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 <magick/MagickCore.h>
48 #include <magick/version.h>
49 #include <libdcp/version.h>
50 #include <libdcp/util.h>
51 #include <libdcp/signer_chain.h>
52 #include <libdcp/signer.h>
53 #include <libdcp/raw_convert.h>
55 #include <libavcodec/avcodec.h>
56 #include <libavformat/avformat.h>
57 #include <libswscale/swscale.h>
58 #include <libavfilter/avfiltergraph.h>
59 #include <libavutil/pixfmt.h>
62 #include "exceptions.h"
64 #include "dcp_content_type.h"
66 #include "sound_processor.h"
71 #include "video_content.h"
72 #include "md5_digester.h"
73 #ifdef DCPOMATIC_WINDOWS
80 using std::stringstream;
94 using std::numeric_limits;
99 using std::set_terminate;
100 using boost::shared_ptr;
102 using boost::optional;
104 using libdcp::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)
127 hms << std::setfill ('0') << m << N_(":");
129 hms << std::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)
149 ap << (h + 1) << N_(" ") << _("hours");
152 ap << N_("1 ") << _("hour");
154 ap << h << N_(" ") << _("hours");
159 ap << N_("1 ") << _("minute");
161 ap << m << N_(" ") << _("minutes");
164 ap << s << N_(" ") << _("seconds");
170 #ifdef DCPOMATIC_POSIX
171 /** @param l Mangled C++ identifier.
172 * @return Demangled version.
177 string::size_type const b = l.find_first_of (N_("("));
178 if (b == string::npos) {
182 string::size_type const p = l.find_last_of (N_("+"));
183 if (p == string::npos) {
191 string const fn = l.substr (b + 1, p - b - 1);
196 char* realname = abi::__cxa_demangle (fn.c_str(), 0, 0, &status);
201 } catch (std::exception) {
208 /** Write a stacktrace to an ostream.
209 * @param out Stream to write to.
210 * @param levels Number of levels to go up the call stack.
213 stacktrace (ostream& out, int levels)
216 size_t size = backtrace (array, 200);
217 char** strings = backtrace_symbols (array, size);
220 for (size_t i = 0; i < size && (levels == 0 || i < size_t(levels)); i++) {
221 out << N_(" ") << demangle (strings[i]) << "\n";
229 /** @param v Version as used by FFmpeg.
230 * @return A string representation of v.
233 ffmpeg_version_to_string (int v)
236 s << ((v & 0xff0000) >> 16) << N_(".") << ((v & 0xff00) >> 8) << N_(".") << (v & 0xff);
240 /** Return a user-readable string summarising the versions of our dependencies */
242 dependency_version_summary ()
245 s << N_("libopenjpeg ") << opj_version () << N_(", ")
246 << N_("libavcodec ") << ffmpeg_version_to_string (avcodec_version()) << N_(", ")
247 << N_("libavfilter ") << ffmpeg_version_to_string (avfilter_version()) << N_(", ")
248 << N_("libavformat ") << ffmpeg_version_to_string (avformat_version()) << N_(", ")
249 << N_("libavutil ") << ffmpeg_version_to_string (avutil_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 fprintf (f, "Exception thrown:");
270 for (dbg::stack::const_iterator i = s.begin(); i != s.end(); ++i) {
271 fprintf (f, "%p %s %d %s\n", i->instruction, i->function.c_str(), i->line, i->module.c_str());
274 return EXCEPTION_CONTINUE_SEARCH;
278 /* From http://stackoverflow.com/questions/2443135/how-do-i-find-where-an-exception-was-thrown-in-c */
282 static bool tried_throw = false;
285 // try once to re-throw currently active exception
291 catch (const std::exception &e) {
292 std::cerr << __FUNCTION__ << " caught unhandled exception. what(): "
293 << e.what() << std::endl;
296 std::cerr << __FUNCTION__ << " caught unknown/unhandled exception."
300 #ifdef DCPOMATIC_POSIX
301 stacktrace (cout, 50);
306 /** Call the required functions to set up DCP-o-matic's static arrays, etc.
307 * Must be called from the UI thread, if there is one.
312 #ifdef DCPOMATIC_WINDOWS
313 backtrace_file /= g_get_user_config_dir ();
314 backtrace_file /= "backtrace.txt";
315 SetUnhandledExceptionFilter(exception_handler);
317 /* Dark voodoo which, I think, gets boost::filesystem::path to
318 correctly convert UTF-8 strings to paths, and also paths
319 back to UTF-8 strings (on path::string()).
321 After this, constructing boost::filesystem::paths from strings
322 converts from UTF-8 to UTF-16 inside the path. Then
323 path::string().c_str() gives UTF-8 and
324 path::c_str() gives UTF-16.
326 This is all Windows-only. AFAICT Linux/OS X use UTF-8 everywhere,
327 so things are much simpler.
329 std::locale::global (boost::locale::generator().generate (""));
330 boost::filesystem::path::imbue (std::locale ());
333 avfilter_register_all ();
336 /* Add our lib directory to the libltdl search path so that
337 xmlsec can find xmlsec1-openssl.
339 boost::filesystem::path lib = app_contents ();
341 setenv ("LTDL_LIBRARY_PATH", lib.c_str (), 1);
344 set_terminate (terminate);
348 Ratio::setup_ratios ();
349 VideoContentScale::setup_scales ();
350 DCPContentType::setup_dcp_content_types ();
351 Scaler::setup_scalers ();
352 Filter::setup_filters ();
353 SoundProcessor::setup_sound_processors ();
355 ui_thread = boost::this_thread::get_id ();
358 #ifdef DCPOMATIC_WINDOWS
359 boost::filesystem::path
363 GetModuleFileName (0, buffer, 512 * sizeof(wchar_t));
364 boost::filesystem::path p (buffer);
365 p = p.parent_path ();
366 p = p.parent_path ();
373 dcpomatic_setup_gettext_i18n (string lang)
375 #ifdef DCPOMATIC_POSIX
379 if (!lang.empty ()) {
380 /* Override our environment language; this is essential on
384 snprintf (cmd, sizeof(cmd), "LANGUAGE=%s", lang.c_str ());
386 snprintf (cmd, sizeof(cmd), "LANG=%s", lang.c_str ());
388 snprintf (cmd, sizeof(cmd), "LC_ALL=%s", lang.c_str ());
392 setlocale (LC_ALL, "");
393 textdomain ("libdcpomatic");
395 #ifdef DCPOMATIC_WINDOWS
396 bindtextdomain ("libdcpomatic", mo_path().string().c_str());
397 bind_textdomain_codeset ("libdcpomatic", "UTF8");
400 #ifdef DCPOMATIC_POSIX
401 bindtextdomain ("libdcpomatic", POSIX_LOCALE_PREFIX);
405 /** @param s A string.
406 * @return Parts of the string split at spaces, except when a space is within quotation marks.
409 split_at_spaces_considering_quotes (string s)
412 bool in_quotes = false;
414 for (string::size_type i = 0; i < s.length(); ++i) {
415 if (s[i] == ' ' && !in_quotes) {
418 } else if (s[i] == '"') {
419 in_quotes = !in_quotes;
429 /** @param job Optional job for which to report progress */
431 md5_digest (vector<boost::filesystem::path> files, shared_ptr<Job> job)
433 boost::uintmax_t const buffer_size = 64 * 1024;
434 char buffer[buffer_size];
436 MD5Digester digester;
438 vector<int64_t> sizes;
439 for (size_t i = 0; i < files.size(); ++i) {
440 sizes.push_back (boost::filesystem::file_size (files[i]));
443 for (size_t i = 0; i < files.size(); ++i) {
444 FILE* f = fopen_boost (files[i], "rb");
446 throw OpenFileError (files[i].string());
449 boost::uintmax_t const bytes = boost::filesystem::file_size (files[i]);
450 boost::uintmax_t remaining = bytes;
452 while (remaining > 0) {
453 int const t = min (remaining, buffer_size);
454 fread (buffer, 1, t, f);
455 digester.add (buffer, t);
459 job->set_progress ((float (i) + 1 - float(remaining) / bytes) / files.size ());
466 return digester.get ();
469 /** @param An arbitrary audio frame rate.
470 * @return The appropriate DCP-approved frame rate (48kHz or 96kHz).
473 dcp_audio_frame_rate (int fs)
482 Socket::Socket (int timeout)
483 : _deadline (_io_service)
484 , _socket (_io_service)
488 _deadline.expires_at (boost::posix_time::pos_infin);
500 if (_deadline.expires_at() <= boost::asio::deadline_timer::traits_type::now ()) {
502 _acceptor->cancel ();
506 _deadline.expires_at (boost::posix_time::pos_infin);
509 _deadline.async_wait (boost::bind (&Socket::check, this));
512 /** Blocking connect.
513 * @param endpoint End-point to connect to.
516 Socket::connect (boost::asio::ip::tcp::endpoint endpoint)
518 _deadline.expires_from_now (boost::posix_time::seconds (_timeout));
519 boost::system::error_code ec = boost::asio::error::would_block;
520 _socket.async_connect (endpoint, boost::lambda::var(ec) = boost::lambda::_1);
522 _io_service.run_one();
523 } while (ec == boost::asio::error::would_block);
526 throw NetworkError (String::compose (_("error during async_connect (%1)"), ec.value ()));
529 if (!_socket.is_open ()) {
530 throw NetworkError (_("connect timed out"));
535 Socket::accept (int port)
537 _acceptor = new boost::asio::ip::tcp::acceptor (_io_service, boost::asio::ip::tcp::endpoint (boost::asio::ip::tcp::v4(), port));
539 _deadline.expires_from_now (boost::posix_time::seconds (_timeout));
540 boost::system::error_code ec = boost::asio::error::would_block;
541 _acceptor->async_accept (_socket, boost::lambda::var(ec) = boost::lambda::_1);
543 _io_service.run_one ();
544 } while (ec == boost::asio::error::would_block );
550 throw NetworkError (String::compose (_("error during async_accept (%1)"), ec.value ()));
555 * @param data Buffer to write.
556 * @param size Number of bytes to write.
559 Socket::write (uint8_t const * data, int size)
561 _deadline.expires_from_now (boost::posix_time::seconds (_timeout));
562 boost::system::error_code ec = boost::asio::error::would_block;
564 boost::asio::async_write (_socket, boost::asio::buffer (data, size), boost::lambda::var(ec) = boost::lambda::_1);
567 _io_service.run_one ();
568 } while (ec == boost::asio::error::would_block);
571 throw NetworkError (String::compose (_("error during async_write (%1)"), ec.value ()));
576 Socket::write (uint32_t v)
579 write (reinterpret_cast<uint8_t*> (&v), 4);
583 * @param data Buffer to read to.
584 * @param size Number of bytes to read.
587 Socket::read (uint8_t* data, int size)
589 _deadline.expires_from_now (boost::posix_time::seconds (_timeout));
590 boost::system::error_code ec = boost::asio::error::would_block;
592 boost::asio::async_read (_socket, boost::asio::buffer (data, size), boost::lambda::var(ec) = boost::lambda::_1);
595 _io_service.run_one ();
596 } while (ec == boost::asio::error::would_block);
599 throw NetworkError (String::compose (_("error during async_read (%1)"), ec.value ()));
604 Socket::read_uint32 ()
607 read (reinterpret_cast<uint8_t *> (&v), 4);
611 /** Round a number up to the nearest multiple of another number.
613 * @param s Array of numbers to round, indexed by c.
614 * @param t Multiple to round to.
615 * @return Rounded number.
618 stride_round_up (int c, int const * stride, int t)
620 int const a = stride[c] + (t - 1);
624 /** Read a sequence of key / value pairs from a text stream;
625 * the keys are the first words on the line, and the values are
626 * the remainder of the line following the key. Lines beginning
627 * with # are ignored.
628 * @param s Stream to read.
629 * @return key/value pairs.
631 multimap<string, string>
632 read_key_value (istream &s)
634 multimap<string, string> kv;
637 while (getline (s, line)) {
642 if (line[0] == '#') {
646 if (line[line.size() - 1] == '\r') {
647 line = line.substr (0, line.size() - 1);
650 size_t const s = line.find (' ');
651 if (s == string::npos) {
655 kv.insert (make_pair (line.substr (0, s), line.substr (s + 1)));
662 get_required_string (multimap<string, string> const & kv, string k)
664 if (kv.count (k) > 1) {
665 throw StringError (N_("unexpected multiple keys in key-value set"));
668 multimap<string, string>::const_iterator i = kv.find (k);
670 if (i == kv.end ()) {
671 throw StringError (String::compose (_("missing key %1 in key-value set"), k));
678 get_required_int (multimap<string, string> const & kv, string k)
680 string const v = get_required_string (kv, k);
681 return raw_convert<int> (v);
685 get_required_float (multimap<string, string> const & kv, string k)
687 string const v = get_required_string (kv, k);
688 return raw_convert<float> (v);
692 get_optional_string (multimap<string, string> const & kv, string k)
694 if (kv.count (k) > 1) {
695 throw StringError (N_("unexpected multiple keys in key-value set"));
698 multimap<string, string>::const_iterator i = kv.find (k);
699 if (i == kv.end ()) {
707 get_optional_int (multimap<string, string> const & kv, string k)
709 if (kv.count (k) > 1) {
710 throw StringError (N_("unexpected multiple keys in key-value set"));
713 multimap<string, string>::const_iterator i = kv.find (k);
714 if (i == kv.end ()) {
718 return raw_convert<int> (i->second);
721 /** Trip an assert if the caller is not in the UI thread */
725 assert (boost::this_thread::get_id() == ui_thread);
728 /** @param v Content video frame.
729 * @param audio_sample_rate Source audio sample rate.
730 * @param frames_per_second Number of video frames per second.
731 * @return Equivalent number of audio frames for `v'.
734 video_frames_to_audio_frames (VideoContent::Frame v, float audio_sample_rate, float frames_per_second)
736 return ((int64_t) v * audio_sample_rate / frames_per_second);
740 audio_channel_name (int c)
742 assert (MAX_DCP_AUDIO_CHANNELS == 12);
744 /* TRANSLATORS: these are the names of audio channels; Lfe (sub) is the low-frequency
745 enhancement channel (sub-woofer). HI is the hearing-impaired audio track and
746 VI is the visually-impaired audio track (audio describe).
748 string const channels[] = {
755 _("Hearing impaired"),
756 _("Visually impaired"),
759 _("Left rear surround"),
760 _("Right rear surround"),
767 valid_image_file (boost::filesystem::path f)
769 string ext = f.extension().string();
770 transform (ext.begin(), ext.end(), ext.begin(), ::tolower);
771 return (ext == ".tif" || ext == ".tiff" || ext == ".jpg" || ext == ".jpeg" || ext == ".png" || ext == ".bmp" || ext == ".tga" || ext == ".dpx");
775 tidy_for_filename (string f)
778 for (size_t i = 0; i < f.length(); ++i) {
779 if (isalnum (f[i]) || f[i] == '_' || f[i] == '-') {
789 shared_ptr<const libdcp::Signer>
792 boost::filesystem::path const sd = Config::instance()->signer_chain_directory ();
794 /* Remake the chain if any of it is missing */
796 list<boost::filesystem::path> files;
797 files.push_back ("ca.self-signed.pem");
798 files.push_back ("intermediate.signed.pem");
799 files.push_back ("leaf.signed.pem");
800 files.push_back ("leaf.key");
802 list<boost::filesystem::path>::const_iterator i = files.begin();
803 while (i != files.end()) {
804 boost::filesystem::path p (sd);
806 if (!boost::filesystem::exists (p)) {
807 boost::filesystem::remove_all (sd);
808 boost::filesystem::create_directories (sd);
809 libdcp::make_signer_chain (sd, openssl_path ());
816 libdcp::CertificateChain chain;
819 boost::filesystem::path p (sd);
820 p /= "ca.self-signed.pem";
821 chain.add (shared_ptr<libdcp::Certificate> (new libdcp::Certificate (p)));
825 boost::filesystem::path p (sd);
826 p /= "intermediate.signed.pem";
827 chain.add (shared_ptr<libdcp::Certificate> (new libdcp::Certificate (p)));
831 boost::filesystem::path p (sd);
832 p /= "leaf.signed.pem";
833 chain.add (shared_ptr<libdcp::Certificate> (new libdcp::Certificate (p)));
836 boost::filesystem::path signer_key (sd);
837 signer_key /= "leaf.key";
839 return shared_ptr<const libdcp::Signer> (new libdcp::Signer (chain, signer_key));
843 split_get_request (string url)
846 AWAITING_QUESTION_MARK,
849 } state = AWAITING_QUESTION_MARK;
851 map<string, string> r;
854 for (size_t i = 0; i < url.length(); ++i) {
856 case AWAITING_QUESTION_MARK:
871 r.insert (make_pair (k, v));
881 if (state == VALUE) {
882 r.insert (make_pair (k, v));
889 fit_ratio_within (float ratio, libdcp::Size full_frame)
891 if (ratio < full_frame.ratio ()) {
892 return libdcp::Size (rint (full_frame.height * ratio), full_frame.height);
895 return libdcp::Size (full_frame.width, rint (full_frame.width / ratio));
899 wrapped_av_malloc (size_t s)
901 void* p = av_malloc (s);
909 entities_to_text (string e)
911 boost::algorithm::replace_all (e, "%3A", ":");
912 boost::algorithm::replace_all (e, "%2F", "/");
917 divide_with_round (int64_t a, int64_t b)
919 if (a % b >= (b / 2)) {
920 return (a + b - 1) / b;
926 ScopedTemporary::ScopedTemporary ()
929 _file = boost::filesystem::temp_directory_path() / boost::filesystem::unique_path ();
932 ScopedTemporary::~ScopedTemporary ()
935 boost::system::error_code ec;
936 boost::filesystem::remove (_file, ec);
940 ScopedTemporary::c_str () const
942 return _file.string().c_str ();
946 ScopedTemporary::open (char const * params)
948 _open = fopen (c_str(), params);
953 ScopedTemporary::close ()