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;
89 using std::numeric_limits;
92 using boost::shared_ptr;
94 using boost::lexical_cast;
95 using boost::optional;
98 static boost::thread::id ui_thread;
99 static boost::filesystem::path backtrace_file;
101 /** Convert some number of seconds to a string representation
102 * in hours, minutes and seconds.
105 * @return String of the form H:M:S (where H is hours, M
106 * is minutes and S is seconds).
109 seconds_to_hms (int s)
119 hms << std::setfill ('0') << m << N_(":");
121 hms << std::setfill ('0') << s;
126 /** @param s Number of seconds.
127 * @return String containing an approximate description of s (e.g. "about 2 hours")
130 seconds_to_approximate_hms (int s)
141 ap << (h + 1) << N_(" ") << _("hours");
144 ap << N_("1 ") << _("hour");
146 ap << h << N_(" ") << _("hours");
151 ap << N_("1 ") << _("minute");
153 ap << m << N_(" ") << _("minutes");
156 ap << s << N_(" ") << _("seconds");
162 #ifdef DCPOMATIC_POSIX
163 /** @param l Mangled C++ identifier.
164 * @return Demangled version.
169 string::size_type const b = l.find_first_of (N_("("));
170 if (b == string::npos) {
174 string::size_type const p = l.find_last_of (N_("+"));
175 if (p == string::npos) {
183 string const fn = l.substr (b + 1, p - b - 1);
188 char* realname = abi::__cxa_demangle (fn.c_str(), 0, 0, &status);
193 } catch (std::exception) {
200 /** Write a stacktrace to an ostream.
201 * @param out Stream to write to.
202 * @param levels Number of levels to go up the call stack.
205 stacktrace (ostream& out, int levels)
208 size_t size = backtrace (array, 200);
209 char** strings = backtrace_symbols (array, size);
212 for (size_t i = 0; i < size && (levels == 0 || i < size_t(levels)); i++) {
213 out << N_(" ") << demangle (strings[i]) << "\n";
221 /** @param v Version as used by FFmpeg.
222 * @return A string representation of v.
225 ffmpeg_version_to_string (int v)
228 s << ((v & 0xff0000) >> 16) << N_(".") << ((v & 0xff00) >> 8) << N_(".") << (v & 0xff);
232 /** Return a user-readable string summarising the versions of our dependencies */
234 dependency_version_summary ()
237 s << N_("libopenjpeg ") << opj_version () << N_(", ")
238 << N_("libavcodec ") << ffmpeg_version_to_string (avcodec_version()) << N_(", ")
239 << N_("libavfilter ") << ffmpeg_version_to_string (avfilter_version()) << N_(", ")
240 << N_("libavformat ") << ffmpeg_version_to_string (avformat_version()) << N_(", ")
241 << N_("libavutil ") << ffmpeg_version_to_string (avutil_version()) << N_(", ")
242 << N_("libpostproc ") << ffmpeg_version_to_string (postproc_version()) << N_(", ")
243 << N_("libswscale ") << ffmpeg_version_to_string (swscale_version()) << N_(", ")
244 << MagickVersion << N_(", ")
245 << N_("libssh ") << ssh_version (0) << N_(", ")
246 << N_("libdcp ") << libdcp::version << N_(" git ") << libdcp::git_commit;
252 seconds (struct timeval t)
254 return t.tv_sec + (double (t.tv_usec) / 1e6);
257 #ifdef DCPOMATIC_WINDOWS
258 LONG WINAPI exception_handler(struct _EXCEPTION_POINTERS *)
261 FILE* f = fopen_boost (backtrace_file, "w");
262 for (dbg::stack::const_iterator i = s.begin(); i != s.end(); ++i) {
263 fprintf (f, "%p %s %d %s", i->instruction, i->function.c_str(), i->line, i->module.c_str());
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);
281 /* Dark voodoo which, I think, gets boost::filesystem::path to
282 correctly convert UTF-8 strings to paths, and also paths
283 back to UTF-8 strings (on path::string()).
285 std::locale::global (boost::locale::generator().generate (""));
286 boost::filesystem::path::imbue (std::locale ());
289 avfilter_register_all ();
292 /* Add our lib directory to the libltdl search path so that
293 xmlsec can find xmlsec1-openssl.
295 boost::filesystem::path lib = app_contents ();
297 setenv ("LTDL_LIBRARY_PATH", lib.c_str (), 1);
302 Ratio::setup_ratios ();
303 DCPContentType::setup_dcp_content_types ();
304 Scaler::setup_scalers ();
305 Filter::setup_filters ();
306 SoundProcessor::setup_sound_processors ();
308 ui_thread = boost::this_thread::get_id ();
311 #ifdef DCPOMATIC_WINDOWS
312 boost::filesystem::path
316 GetModuleFileName (0, buffer, 512 * sizeof(wchar_t));
317 boost::filesystem::path p (buffer);
318 p = p.parent_path ();
319 p = p.parent_path ();
326 dcpomatic_setup_gettext_i18n (string lang)
328 #ifdef DCPOMATIC_POSIX
332 if (!lang.empty ()) {
333 /* Override our environment language; this is essential on
337 snprintf (cmd, sizeof(cmd), "LANGUAGE=%s", lang.c_str ());
339 snprintf (cmd, sizeof(cmd), "LANG=%s", lang.c_str ());
343 setlocale (LC_ALL, "");
344 textdomain ("libdcpomatic");
346 #ifdef DCPOMATIC_WINDOWS
347 bindtextdomain ("libdcpomatic", mo_path().string().c_str());
348 bind_textdomain_codeset ("libdcpomatic", "UTF8");
351 #ifdef DCPOMATIC_POSIX
352 bindtextdomain ("libdcpomatic", POSIX_LOCALE_PREFIX);
356 /** @param s A string.
357 * @return Parts of the string split at spaces, except when a space is within quotation marks.
360 split_at_spaces_considering_quotes (string s)
363 bool in_quotes = false;
365 for (string::size_type i = 0; i < s.length(); ++i) {
366 if (s[i] == ' ' && !in_quotes) {
369 } else if (s[i] == '"') {
370 in_quotes = !in_quotes;
381 md5_digest (void const * data, int size)
384 MD5_Init (&md5_context);
385 MD5_Update (&md5_context, data, size);
386 unsigned char digest[MD5_DIGEST_LENGTH];
387 MD5_Final (digest, &md5_context);
390 for (int i = 0; i < MD5_DIGEST_LENGTH; ++i) {
391 s << std::hex << std::setfill('0') << std::setw(2) << ((int) digest[i]);
397 /** @param file File name.
398 * @return MD5 digest of file's contents.
401 md5_digest (boost::filesystem::path file)
403 FILE* f = fopen_boost (file, "rb");
405 throw OpenFileError (file.string());
408 boost::uintmax_t bytes = boost::filesystem::file_size (file);
410 boost::uintmax_t const buffer_size = 64 * 1024;
411 char buffer[buffer_size];
414 MD5_Init (&md5_context);
416 int const t = min (bytes, buffer_size);
417 fread (buffer, 1, t, f);
418 MD5_Update (&md5_context, buffer, t);
422 unsigned char digest[MD5_DIGEST_LENGTH];
423 MD5_Final (digest, &md5_context);
427 for (int i = 0; i < MD5_DIGEST_LENGTH; ++i) {
428 s << std::hex << std::setfill('0') << std::setw(2) << ((int) digest[i]);
434 /** @param job Optional job for which to report progress */
436 md5_digest_directory (boost::filesystem::path directory, shared_ptr<Job> job)
438 boost::uintmax_t const buffer_size = 64 * 1024;
439 char buffer[buffer_size];
442 MD5_Init (&md5_context);
446 for (boost::filesystem::directory_iterator i(directory); i != boost::filesystem::directory_iterator(); ++i) {
452 for (boost::filesystem::directory_iterator i(directory); i != boost::filesystem::directory_iterator(); ++i) {
453 FILE* f = fopen_boost (i->path(), "rb");
455 throw OpenFileError (i->path().string());
458 boost::uintmax_t bytes = boost::filesystem::file_size (i->path ());
461 int const t = min (bytes, buffer_size);
462 fread (buffer, 1, t, f);
463 MD5_Update (&md5_context, buffer, t);
468 job->set_progress (float (j) / files);
475 unsigned char digest[MD5_DIGEST_LENGTH];
476 MD5_Final (digest, &md5_context);
479 for (int i = 0; i < MD5_DIGEST_LENGTH; ++i) {
480 s << std::hex << std::setfill('0') << std::setw(2) << ((int) digest[i]);
487 about_equal (float a, float b)
489 /* A film of F seconds at f FPS will be Ff frames;
490 Consider some delta FPS d, so if we run the same
491 film at (f + d) FPS it will last F(f + d) seconds.
493 Hence the difference in length over the length of the film will
494 be F(f + d) - Ff frames
495 = Ff + Fd - Ff frames
499 So if we accept a difference of 1 frame, ie 1/f seconds, we can
506 So for a 3hr film, ie F = 3 * 60 * 60 = 10800, the acceptable
507 FPS error is 1/F ~= 0.0001 ~= 10-e4
510 return (fabs (a - b) < 1e-4);
513 /** @param An arbitrary audio frame rate.
514 * @return The appropriate DCP-approved frame rate (48kHz or 96kHz).
517 dcp_audio_frame_rate (int fs)
526 Socket::Socket (int timeout)
527 : _deadline (_io_service)
528 , _socket (_io_service)
532 _deadline.expires_at (boost::posix_time::pos_infin);
544 if (_deadline.expires_at() <= boost::asio::deadline_timer::traits_type::now ()) {
546 _acceptor->cancel ();
550 _deadline.expires_at (boost::posix_time::pos_infin);
553 _deadline.async_wait (boost::bind (&Socket::check, this));
556 /** Blocking connect.
557 * @param endpoint End-point to connect to.
560 Socket::connect (boost::asio::ip::tcp::endpoint endpoint)
562 _deadline.expires_from_now (boost::posix_time::seconds (_timeout));
563 boost::system::error_code ec = boost::asio::error::would_block;
564 _socket.async_connect (endpoint, boost::lambda::var(ec) = boost::lambda::_1);
566 _io_service.run_one();
567 } while (ec == boost::asio::error::would_block);
570 throw NetworkError (ec.message ());
573 if (!_socket.is_open ()) {
574 throw NetworkError (_("connect timed out"));
579 Socket::accept (int port)
581 _acceptor = new boost::asio::ip::tcp::acceptor (_io_service, boost::asio::ip::tcp::endpoint (boost::asio::ip::tcp::v4(), port));
583 _deadline.expires_from_now (boost::posix_time::seconds (_timeout));
584 boost::system::error_code ec = boost::asio::error::would_block;
585 _acceptor->async_accept (_socket, boost::lambda::var(ec) = boost::lambda::_1);
587 _io_service.run_one ();
588 } while (ec == boost::asio::error::would_block );
594 throw NetworkError (ec.message ());
599 * @param data Buffer to write.
600 * @param size Number of bytes to write.
603 Socket::write (uint8_t const * data, int size)
605 _deadline.expires_from_now (boost::posix_time::seconds (_timeout));
606 boost::system::error_code ec = boost::asio::error::would_block;
608 boost::asio::async_write (_socket, boost::asio::buffer (data, size), boost::lambda::var(ec) = boost::lambda::_1);
611 _io_service.run_one ();
612 } while (ec == boost::asio::error::would_block);
615 throw NetworkError (ec.message ());
620 Socket::write (uint32_t v)
623 write (reinterpret_cast<uint8_t*> (&v), 4);
627 * @param data Buffer to read to.
628 * @param size Number of bytes to read.
631 Socket::read (uint8_t* data, int size)
633 _deadline.expires_from_now (boost::posix_time::seconds (_timeout));
634 boost::system::error_code ec = boost::asio::error::would_block;
636 boost::asio::async_read (_socket, boost::asio::buffer (data, size), boost::lambda::var(ec) = boost::lambda::_1);
639 _io_service.run_one ();
640 } while (ec == boost::asio::error::would_block);
643 throw NetworkError (ec.message ());
648 Socket::read_uint32 ()
651 read (reinterpret_cast<uint8_t *> (&v), 4);
655 /** Round a number up to the nearest multiple of another number.
657 * @param s Array of numbers to round, indexed by c.
658 * @param t Multiple to round to.
659 * @return Rounded number.
662 stride_round_up (int c, int const * stride, int t)
664 int const a = stride[c] + (t - 1);
668 /** Read a sequence of key / value pairs from a text stream;
669 * the keys are the first words on the line, and the values are
670 * the remainder of the line following the key. Lines beginning
671 * with # are ignored.
672 * @param s Stream to read.
673 * @return key/value pairs.
675 multimap<string, string>
676 read_key_value (istream &s)
678 multimap<string, string> kv;
681 while (getline (s, line)) {
686 if (line[0] == '#') {
690 if (line[line.size() - 1] == '\r') {
691 line = line.substr (0, line.size() - 1);
694 size_t const s = line.find (' ');
695 if (s == string::npos) {
699 kv.insert (make_pair (line.substr (0, s), line.substr (s + 1)));
706 get_required_string (multimap<string, string> const & kv, string k)
708 if (kv.count (k) > 1) {
709 throw StringError (N_("unexpected multiple keys in key-value set"));
712 multimap<string, string>::const_iterator i = kv.find (k);
714 if (i == kv.end ()) {
715 throw StringError (String::compose (_("missing key %1 in key-value set"), k));
722 get_required_int (multimap<string, string> const & kv, string k)
724 string const v = get_required_string (kv, k);
725 return lexical_cast<int> (v);
729 get_required_float (multimap<string, string> const & kv, string k)
731 string const v = get_required_string (kv, k);
732 return lexical_cast<float> (v);
736 get_optional_string (multimap<string, string> const & kv, string k)
738 if (kv.count (k) > 1) {
739 throw StringError (N_("unexpected multiple keys in key-value set"));
742 multimap<string, string>::const_iterator i = kv.find (k);
743 if (i == kv.end ()) {
751 get_optional_int (multimap<string, string> const & kv, string k)
753 if (kv.count (k) > 1) {
754 throw StringError (N_("unexpected multiple keys in key-value set"));
757 multimap<string, string>::const_iterator i = kv.find (k);
758 if (i == kv.end ()) {
762 return lexical_cast<int> (i->second);
765 /** Trip an assert if the caller is not in the UI thread */
769 assert (boost::this_thread::get_id() == ui_thread);
772 /** @param v Content video frame.
773 * @param audio_sample_rate Source audio sample rate.
774 * @param frames_per_second Number of video frames per second.
775 * @return Equivalent number of audio frames for `v'.
778 video_frames_to_audio_frames (VideoContent::Frame v, float audio_sample_rate, float frames_per_second)
780 return ((int64_t) v * audio_sample_rate / frames_per_second);
784 audio_channel_name (int c)
786 assert (MAX_AUDIO_CHANNELS == 6);
788 /* TRANSLATORS: these are the names of audio channels; Lfe (sub) is the low-frequency
789 enhancement channel (sub-woofer).
791 string const channels[] = {
803 FrameRateConversion::FrameRateConversion (float source, int dcp)
806 , change_speed (false)
808 if (fabs (source / 2.0 - dcp) < fabs (source - dcp)) {
809 /* The difference between source and DCP frame rate will be lower
810 (i.e. better) if we skip.
813 } else if (fabs (source * 2 - dcp) < fabs (source - dcp)) {
814 /* The difference between source and DCP frame rate would be better
815 if we repeated each frame once; it may be better still if we
816 repeated more than once. Work out the required repeat.
818 repeat = round (dcp / source);
821 change_speed = !about_equal (source * factor(), dcp);
823 if (!skip && repeat == 1 && !change_speed) {
824 description = _("Content and DCP have the same rate.\n");
827 description = _("DCP will use every other frame of the content.\n");
828 } else if (repeat == 2) {
829 description = _("Each content frame will be doubled in the DCP.\n");
830 } else if (repeat > 2) {
831 description = String::compose (_("Each content frame will be repeated %1 more times in the DCP.\n"), repeat - 1);
835 float const pc = dcp * 100 / (source * factor());
836 description += String::compose (_("DCP will run at %1%% of the content speed.\n"), pc);
841 LocaleGuard::LocaleGuard ()
844 char const * old = setlocale (LC_NUMERIC, 0);
848 if (strcmp (_old, "C")) {
849 setlocale (LC_NUMERIC, "C");
854 LocaleGuard::~LocaleGuard ()
856 setlocale (LC_NUMERIC, _old);
861 valid_image_file (boost::filesystem::path f)
863 string ext = f.extension().string();
864 transform (ext.begin(), ext.end(), ext.begin(), ::tolower);
865 return (ext == ".tif" || ext == ".tiff" || ext == ".jpg" || ext == ".jpeg" || ext == ".png" || ext == ".bmp" || ext == ".tga");
869 tidy_for_filename (string f)
872 for (size_t i = 0; i < f.length(); ++i) {
873 if (isalnum (f[i]) || f[i] == '_' || f[i] == '-') {
883 shared_ptr<const libdcp::Signer>
886 boost::filesystem::path const sd = Config::instance()->signer_chain_directory ();
888 /* Remake the chain if any of it is missing */
890 list<boost::filesystem::path> files;
891 files.push_back ("ca.self-signed.pem");
892 files.push_back ("intermediate.signed.pem");
893 files.push_back ("leaf.signed.pem");
894 files.push_back ("leaf.key");
896 list<boost::filesystem::path>::const_iterator i = files.begin();
897 while (i != files.end()) {
898 boost::filesystem::path p (sd);
900 if (!boost::filesystem::exists (p)) {
901 boost::filesystem::remove_all (sd);
902 boost::filesystem::create_directories (sd);
903 libdcp::make_signer_chain (sd, openssl_path ());
910 libdcp::CertificateChain chain;
913 boost::filesystem::path p (sd);
914 p /= "ca.self-signed.pem";
915 chain.add (shared_ptr<libdcp::Certificate> (new libdcp::Certificate (p)));
919 boost::filesystem::path p (sd);
920 p /= "intermediate.signed.pem";
921 chain.add (shared_ptr<libdcp::Certificate> (new libdcp::Certificate (p)));
925 boost::filesystem::path p (sd);
926 p /= "leaf.signed.pem";
927 chain.add (shared_ptr<libdcp::Certificate> (new libdcp::Certificate (p)));
930 boost::filesystem::path signer_key (sd);
931 signer_key /= "leaf.key";
933 return shared_ptr<const libdcp::Signer> (new libdcp::Signer (chain, signer_key));
937 fit_ratio_within (float ratio, libdcp::Size full_frame)
939 if (ratio < full_frame.ratio ()) {
940 return libdcp::Size (rint (full_frame.height * ratio), full_frame.height);
943 return libdcp::Size (full_frame.width, rint (full_frame.width / ratio));