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.
30 #ifdef DCPOMATIC_POSIX
34 #include <libssh/libssh.h>
36 #include <boost/algorithm/string.hpp>
37 #include <boost/bind.hpp>
38 #include <boost/lambda/lambda.hpp>
39 #include <boost/lexical_cast.hpp>
40 #include <boost/thread.hpp>
41 #include <boost/filesystem.hpp>
44 #include <openssl/md5.h>
45 #include <magick/MagickCore.h>
46 #include <magick/version.h>
47 #include <libdcp/version.h>
48 #include <libdcp/util.h>
49 #include <libdcp/signer_chain.h>
50 #include <libdcp/signer.h>
52 #include <libavcodec/avcodec.h>
53 #include <libavformat/avformat.h>
54 #include <libswscale/swscale.h>
55 #include <libavfilter/avfiltergraph.h>
56 #include <libpostproc/postprocess.h>
57 #include <libavutil/pixfmt.h>
60 #include "exceptions.h"
62 #include "dcp_content_type.h"
64 #include "sound_processor.h"
69 #ifdef DCPOMATIC_WINDOWS
76 using std::stringstream;
90 using std::numeric_limits;
95 using boost::shared_ptr;
97 using boost::lexical_cast;
98 using boost::optional;
101 static boost::thread::id ui_thread;
102 static boost::filesystem::path backtrace_file;
104 /** Convert some number of seconds to a string representation
105 * in hours, minutes and seconds.
108 * @return String of the form H:M:S (where H is hours, M
109 * is minutes and S is seconds).
112 seconds_to_hms (int s)
122 hms << std::setfill ('0') << m << N_(":");
124 hms << std::setfill ('0') << s;
129 /** @param s Number of seconds.
130 * @return String containing an approximate description of s (e.g. "about 2 hours")
133 seconds_to_approximate_hms (int s)
144 ap << (h + 1) << N_(" ") << _("hours");
147 ap << N_("1 ") << _("hour");
149 ap << h << N_(" ") << _("hours");
154 ap << N_("1 ") << _("minute");
156 ap << m << N_(" ") << _("minutes");
159 ap << s << N_(" ") << _("seconds");
165 #ifdef DCPOMATIC_POSIX
166 /** @param l Mangled C++ identifier.
167 * @return Demangled version.
172 string::size_type const b = l.find_first_of (N_("("));
173 if (b == string::npos) {
177 string::size_type const p = l.find_last_of (N_("+"));
178 if (p == string::npos) {
186 string const fn = l.substr (b + 1, p - b - 1);
191 char* realname = abi::__cxa_demangle (fn.c_str(), 0, 0, &status);
196 } catch (std::exception) {
203 /** Write a stacktrace to an ostream.
204 * @param out Stream to write to.
205 * @param levels Number of levels to go up the call stack.
208 stacktrace (ostream& out, int levels)
211 size_t size = backtrace (array, 200);
212 char** strings = backtrace_symbols (array, size);
215 for (size_t i = 0; i < size && (levels == 0 || i < size_t(levels)); i++) {
216 out << N_(" ") << demangle (strings[i]) << "\n";
224 /** @param v Version as used by FFmpeg.
225 * @return A string representation of v.
228 ffmpeg_version_to_string (int v)
231 s << ((v & 0xff0000) >> 16) << N_(".") << ((v & 0xff00) >> 8) << N_(".") << (v & 0xff);
235 /** Return a user-readable string summarising the versions of our dependencies */
237 dependency_version_summary ()
240 s << N_("libopenjpeg ") << opj_version () << N_(", ")
241 << N_("libavcodec ") << ffmpeg_version_to_string (avcodec_version()) << N_(", ")
242 << N_("libavfilter ") << ffmpeg_version_to_string (avfilter_version()) << N_(", ")
243 << N_("libavformat ") << ffmpeg_version_to_string (avformat_version()) << N_(", ")
244 << N_("libavutil ") << ffmpeg_version_to_string (avutil_version()) << N_(", ")
245 << N_("libpostproc ") << ffmpeg_version_to_string (postproc_version()) << N_(", ")
246 << N_("libswscale ") << ffmpeg_version_to_string (swscale_version()) << N_(", ")
247 << MagickVersion << N_(", ")
248 << N_("libssh ") << ssh_version (0) << N_(", ")
249 << N_("libdcp ") << libdcp::version << N_(" git ") << libdcp::git_commit;
255 seconds (struct timeval t)
257 return t.tv_sec + (double (t.tv_usec) / 1e6);
260 #ifdef DCPOMATIC_WINDOWS
261 LONG WINAPI exception_handler(struct _EXCEPTION_POINTERS *)
264 ofstream f (backtrace_file.string().c_str());
265 std::copy(s.begin(), s.end(), std::ostream_iterator<dbg::stack_frame>(f, "\n"));
266 return EXCEPTION_CONTINUE_SEARCH;
270 /** Call the required functions to set up DCP-o-matic's static arrays, etc.
271 * Must be called from the UI thread, if there is one.
276 #ifdef DCPOMATIC_WINDOWS
277 backtrace_file /= g_get_user_config_dir ();
278 backtrace_file /= "backtrace.txt";
279 SetUnhandledExceptionFilter(exception_handler);
282 avfilter_register_all ();
285 /* Add our lib directory to the libltdl search path so that
286 xmlsec can find xmlsec1-openssl.
288 boost::filesystem::path lib = app_contents ();
290 setenv ("LTDL_LIBRARY_PATH", lib.c_str (), 1);
295 Ratio::setup_ratios ();
296 DCPContentType::setup_dcp_content_types ();
297 Scaler::setup_scalers ();
298 Filter::setup_filters ();
299 SoundProcessor::setup_sound_processors ();
301 ui_thread = boost::this_thread::get_id ();
304 #ifdef DCPOMATIC_WINDOWS
305 boost::filesystem::path
309 GetModuleFileName (0, buffer, 512 * sizeof(wchar_t));
310 boost::filesystem::path p (buffer);
311 p = p.parent_path ();
312 p = p.parent_path ();
319 dcpomatic_setup_gettext_i18n (string lang)
321 #ifdef DCPOMATIC_POSIX
325 if (!lang.empty ()) {
326 /* Override our environment language; this is essential on
330 snprintf (cmd, sizeof(cmd), "LANGUAGE=%s", lang.c_str ());
332 snprintf (cmd, sizeof(cmd), "LANG=%s", lang.c_str ());
336 setlocale (LC_ALL, "");
337 textdomain ("libdcpomatic");
339 #ifdef DCPOMATIC_WINDOWS
340 bindtextdomain ("libdcpomatic", mo_path().string().c_str());
341 bind_textdomain_codeset ("libdcpomatic", "UTF8");
344 #ifdef DCPOMATIC_POSIX
345 bindtextdomain ("libdcpomatic", POSIX_LOCALE_PREFIX);
349 /** @param s A string.
350 * @return Parts of the string split at spaces, except when a space is within quotation marks.
353 split_at_spaces_considering_quotes (string s)
356 bool in_quotes = false;
358 for (string::size_type i = 0; i < s.length(); ++i) {
359 if (s[i] == ' ' && !in_quotes) {
362 } else if (s[i] == '"') {
363 in_quotes = !in_quotes;
374 md5_digest (void const * data, int size)
377 MD5_Init (&md5_context);
378 MD5_Update (&md5_context, data, size);
379 unsigned char digest[MD5_DIGEST_LENGTH];
380 MD5_Final (digest, &md5_context);
383 for (int i = 0; i < MD5_DIGEST_LENGTH; ++i) {
384 s << std::hex << std::setfill('0') << std::setw(2) << ((int) digest[i]);
390 /** @param job Optional job for which to report progress */
392 md5_digest (vector<boost::filesystem::path> files, shared_ptr<Job> job)
394 int const buffer_size = 64 * 1024;
395 char buffer[buffer_size];
398 MD5_Init (&md5_context);
400 vector<int64_t> sizes;
401 for (size_t i = 0; i < files.size(); ++i) {
402 sizes.push_back (boost::filesystem::file_size (files[i]));
405 for (size_t i = 0; i < files.size(); ++i) {
406 ifstream f (files[i].string().c_str(), std::ios::binary);
408 throw OpenFileError (files[i].string());
411 f.seekg (0, std::ios::end);
412 streampos const bytes = f.tellg ();
413 f.seekg (0, std::ios::beg);
415 streampos remaining = bytes;
416 while (remaining > 0) {
417 int const t = min (remaining, streampos (buffer_size));
419 MD5_Update (&md5_context, buffer, t);
423 job->set_progress ((float (i) + 1 - float(remaining) / bytes) / files.size ());
428 unsigned char digest[MD5_DIGEST_LENGTH];
429 MD5_Final (digest, &md5_context);
432 for (int i = 0; i < MD5_DIGEST_LENGTH; ++i) {
433 s << std::hex << std::setfill('0') << std::setw(2) << ((int) digest[i]);
440 about_equal (float a, float b)
442 /* A film of F seconds at f FPS will be Ff frames;
443 Consider some delta FPS d, so if we run the same
444 film at (f + d) FPS it will last F(f + d) seconds.
446 Hence the difference in length over the length of the film will
447 be F(f + d) - Ff frames
448 = Ff + Fd - Ff frames
452 So if we accept a difference of 1 frame, ie 1/f seconds, we can
459 So for a 3hr film, ie F = 3 * 60 * 60 = 10800, the acceptable
460 FPS error is 1/F ~= 0.0001 ~= 10-e4
463 return (fabs (a - b) < 1e-4);
466 /** @param An arbitrary audio frame rate.
467 * @return The appropriate DCP-approved frame rate (48kHz or 96kHz).
470 dcp_audio_frame_rate (int fs)
479 Socket::Socket (int timeout)
480 : _deadline (_io_service)
481 , _socket (_io_service)
485 _deadline.expires_at (boost::posix_time::pos_infin);
497 if (_deadline.expires_at() <= boost::asio::deadline_timer::traits_type::now ()) {
499 _acceptor->cancel ();
503 _deadline.expires_at (boost::posix_time::pos_infin);
506 _deadline.async_wait (boost::bind (&Socket::check, this));
509 /** Blocking connect.
510 * @param endpoint End-point to connect to.
513 Socket::connect (boost::asio::ip::tcp::endpoint endpoint)
515 _deadline.expires_from_now (boost::posix_time::seconds (_timeout));
516 boost::system::error_code ec = boost::asio::error::would_block;
517 _socket.async_connect (endpoint, boost::lambda::var(ec) = boost::lambda::_1);
519 _io_service.run_one();
520 } while (ec == boost::asio::error::would_block);
523 throw NetworkError (ec.message ());
526 if (!_socket.is_open ()) {
527 throw NetworkError (_("connect timed out"));
532 Socket::accept (int port)
534 _acceptor = new boost::asio::ip::tcp::acceptor (_io_service, boost::asio::ip::tcp::endpoint (boost::asio::ip::tcp::v4(), port));
536 _deadline.expires_from_now (boost::posix_time::seconds (_timeout));
537 boost::system::error_code ec = boost::asio::error::would_block;
538 _acceptor->async_accept (_socket, boost::lambda::var(ec) = boost::lambda::_1);
540 _io_service.run_one ();
541 } while (ec == boost::asio::error::would_block );
547 throw NetworkError (ec.message ());
552 * @param data Buffer to write.
553 * @param size Number of bytes to write.
556 Socket::write (uint8_t const * data, int size)
558 _deadline.expires_from_now (boost::posix_time::seconds (_timeout));
559 boost::system::error_code ec = boost::asio::error::would_block;
561 boost::asio::async_write (_socket, boost::asio::buffer (data, size), boost::lambda::var(ec) = boost::lambda::_1);
564 _io_service.run_one ();
565 } while (ec == boost::asio::error::would_block);
568 throw NetworkError (ec.message ());
573 Socket::write (uint32_t v)
576 write (reinterpret_cast<uint8_t*> (&v), 4);
580 * @param data Buffer to read to.
581 * @param size Number of bytes to read.
584 Socket::read (uint8_t* data, int size)
586 _deadline.expires_from_now (boost::posix_time::seconds (_timeout));
587 boost::system::error_code ec = boost::asio::error::would_block;
589 boost::asio::async_read (_socket, boost::asio::buffer (data, size), boost::lambda::var(ec) = boost::lambda::_1);
592 _io_service.run_one ();
593 } while (ec == boost::asio::error::would_block);
596 throw NetworkError (ec.message ());
601 Socket::read_uint32 ()
604 read (reinterpret_cast<uint8_t *> (&v), 4);
608 /** Round a number up to the nearest multiple of another number.
610 * @param s Array of numbers to round, indexed by c.
611 * @param t Multiple to round to.
612 * @return Rounded number.
615 stride_round_up (int c, int const * stride, int t)
617 int const a = stride[c] + (t - 1);
621 /** Read a sequence of key / value pairs from a text stream;
622 * the keys are the first words on the line, and the values are
623 * the remainder of the line following the key. Lines beginning
624 * with # are ignored.
625 * @param s Stream to read.
626 * @return key/value pairs.
628 multimap<string, string>
629 read_key_value (istream &s)
631 multimap<string, string> kv;
634 while (getline (s, line)) {
639 if (line[0] == '#') {
643 if (line[line.size() - 1] == '\r') {
644 line = line.substr (0, line.size() - 1);
647 size_t const s = line.find (' ');
648 if (s == string::npos) {
652 kv.insert (make_pair (line.substr (0, s), line.substr (s + 1)));
659 get_required_string (multimap<string, string> const & kv, string k)
661 if (kv.count (k) > 1) {
662 throw StringError (N_("unexpected multiple keys in key-value set"));
665 multimap<string, string>::const_iterator i = kv.find (k);
667 if (i == kv.end ()) {
668 throw StringError (String::compose (_("missing key %1 in key-value set"), k));
675 get_required_int (multimap<string, string> const & kv, string k)
677 string const v = get_required_string (kv, k);
678 return lexical_cast<int> (v);
682 get_required_float (multimap<string, string> const & kv, string k)
684 string const v = get_required_string (kv, k);
685 return lexical_cast<float> (v);
689 get_optional_string (multimap<string, string> const & kv, string k)
691 if (kv.count (k) > 1) {
692 throw StringError (N_("unexpected multiple keys in key-value set"));
695 multimap<string, string>::const_iterator i = kv.find (k);
696 if (i == kv.end ()) {
704 get_optional_int (multimap<string, string> const & kv, string k)
706 if (kv.count (k) > 1) {
707 throw StringError (N_("unexpected multiple keys in key-value set"));
710 multimap<string, string>::const_iterator i = kv.find (k);
711 if (i == kv.end ()) {
715 return lexical_cast<int> (i->second);
718 /** Trip an assert if the caller is not in the UI thread */
722 assert (boost::this_thread::get_id() == ui_thread);
725 /** @param v Content video frame.
726 * @param audio_sample_rate Source audio sample rate.
727 * @param frames_per_second Number of video frames per second.
728 * @return Equivalent number of audio frames for `v'.
731 video_frames_to_audio_frames (VideoContent::Frame v, float audio_sample_rate, float frames_per_second)
733 return ((int64_t) v * audio_sample_rate / frames_per_second);
737 audio_channel_name (int c)
739 assert (MAX_AUDIO_CHANNELS == 6);
741 /* TRANSLATORS: these are the names of audio channels; Lfe (sub) is the low-frequency
742 enhancement channel (sub-woofer).
744 string const channels[] = {
756 FrameRateConversion::FrameRateConversion (float source, int dcp)
759 , change_speed (false)
761 if (fabs (source / 2.0 - dcp) < fabs (source - dcp)) {
762 /* The difference between source and DCP frame rate will be lower
763 (i.e. better) if we skip.
766 } else if (fabs (source * 2 - dcp) < fabs (source - dcp)) {
767 /* The difference between source and DCP frame rate would be better
768 if we repeated each frame once; it may be better still if we
769 repeated more than once. Work out the required repeat.
771 repeat = round (dcp / source);
774 change_speed = !about_equal (source * factor(), dcp);
776 if (!skip && repeat == 1 && !change_speed) {
777 description = _("Content and DCP have the same rate.\n");
780 description = _("DCP will use every other frame of the content.\n");
781 } else if (repeat == 2) {
782 description = _("Each content frame will be doubled in the DCP.\n");
783 } else if (repeat > 2) {
784 description = String::compose (_("Each content frame will be repeated %1 more times in the DCP.\n"), repeat - 1);
788 float const pc = dcp * 100 / (source * factor());
789 description += String::compose (_("DCP will run at %1%% of the content speed.\n"), pc);
794 LocaleGuard::LocaleGuard ()
797 char const * old = setlocale (LC_NUMERIC, 0);
801 if (strcmp (_old, "C")) {
802 setlocale (LC_NUMERIC, "C");
807 LocaleGuard::~LocaleGuard ()
809 setlocale (LC_NUMERIC, _old);
814 valid_image_file (boost::filesystem::path f)
816 string ext = f.extension().string();
817 transform (ext.begin(), ext.end(), ext.begin(), ::tolower);
818 return (ext == ".tif" || ext == ".tiff" || ext == ".jpg" || ext == ".jpeg" || ext == ".png" || ext == ".bmp" || ext == ".tga");
822 tidy_for_filename (string f)
825 for (size_t i = 0; i < f.length(); ++i) {
826 if (isalnum (f[i]) || f[i] == '_' || f[i] == '-') {
836 shared_ptr<const libdcp::Signer>
839 boost::filesystem::path const sd = Config::instance()->signer_chain_directory ();
841 /* Remake the chain if any of it is missing */
843 list<boost::filesystem::path> files;
844 files.push_back ("ca.self-signed.pem");
845 files.push_back ("intermediate.signed.pem");
846 files.push_back ("leaf.signed.pem");
847 files.push_back ("leaf.key");
849 list<boost::filesystem::path>::const_iterator i = files.begin();
850 while (i != files.end()) {
851 boost::filesystem::path p (sd);
853 if (!boost::filesystem::exists (p)) {
854 boost::filesystem::remove_all (sd);
855 boost::filesystem::create_directories (sd);
856 libdcp::make_signer_chain (sd, openssl_path ());
863 libdcp::CertificateChain chain;
866 boost::filesystem::path p (sd);
867 p /= "ca.self-signed.pem";
868 chain.add (shared_ptr<libdcp::Certificate> (new libdcp::Certificate (p)));
872 boost::filesystem::path p (sd);
873 p /= "intermediate.signed.pem";
874 chain.add (shared_ptr<libdcp::Certificate> (new libdcp::Certificate (p)));
878 boost::filesystem::path p (sd);
879 p /= "leaf.signed.pem";
880 chain.add (shared_ptr<libdcp::Certificate> (new libdcp::Certificate (p)));
883 boost::filesystem::path signer_key (sd);
884 signer_key /= "leaf.key";
886 return shared_ptr<const libdcp::Signer> (new libdcp::Signer (chain, signer_key));
890 fit_ratio_within (float ratio, libdcp::Size full_frame)
892 if (ratio < full_frame.ratio ()) {
893 return libdcp::Size (rint (full_frame.height * ratio), full_frame.height);
896 return libdcp::Size (full_frame.width, rint (full_frame.width / ratio));