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"
68 #ifdef DCPOMATIC_WINDOWS
75 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 ofstream f (backtrace_file.string().c_str());
262 std::copy(s.begin(), s.end(), std::ostream_iterator<dbg::stack_frame>(f, "\n"));
263 return EXCEPTION_CONTINUE_SEARCH;
267 /** Call the required functions to set up DCP-o-matic's static arrays, etc.
268 * Must be called from the UI thread, if there is one.
273 #ifdef DCPOMATIC_WINDOWS
274 backtrace_file /= g_get_user_config_dir ();
275 backtrace_file /= "backtrace.txt";
276 SetUnhandledExceptionFilter(exception_handler);
279 avfilter_register_all ();
283 Ratio::setup_ratios ();
284 DCPContentType::setup_dcp_content_types ();
285 Scaler::setup_scalers ();
286 Filter::setup_filters ();
287 SoundProcessor::setup_sound_processors ();
289 ui_thread = boost::this_thread::get_id ();
292 #ifdef DCPOMATIC_WINDOWS
293 boost::filesystem::path
297 GetModuleFileName (0, buffer, 512 * sizeof(wchar_t));
298 boost::filesystem::path p (buffer);
299 p = p.parent_path ();
300 p = p.parent_path ();
307 dcpomatic_setup_gettext_i18n (string lang)
309 #ifdef DCPOMATIC_POSIX
313 if (!lang.empty ()) {
314 /* Override our environment language; this is essential on
318 snprintf (cmd, sizeof(cmd), "LANGUAGE=%s", lang.c_str ());
320 snprintf (cmd, sizeof(cmd), "LANG=%s", lang.c_str ());
324 setlocale (LC_ALL, "");
325 textdomain ("libdcpomatic");
327 #ifdef DCPOMATIC_WINDOWS
328 bindtextdomain ("libdcpomatic", mo_path().string().c_str());
329 bind_textdomain_codeset ("libdcpomatic", "UTF8");
332 #ifdef DCPOMATIC_POSIX
333 bindtextdomain ("libdcpomatic", POSIX_LOCALE_PREFIX);
337 /** @param s A string.
338 * @return Parts of the string split at spaces, except when a space is within quotation marks.
341 split_at_spaces_considering_quotes (string s)
344 bool in_quotes = false;
346 for (string::size_type i = 0; i < s.length(); ++i) {
347 if (s[i] == ' ' && !in_quotes) {
350 } else if (s[i] == '"') {
351 in_quotes = !in_quotes;
362 md5_digest (void const * data, int size)
365 MD5_Init (&md5_context);
366 MD5_Update (&md5_context, data, size);
367 unsigned char digest[MD5_DIGEST_LENGTH];
368 MD5_Final (digest, &md5_context);
371 for (int i = 0; i < MD5_DIGEST_LENGTH; ++i) {
372 s << std::hex << std::setfill('0') << std::setw(2) << ((int) digest[i]);
378 /** @param file File name.
379 * @return MD5 digest of file's contents.
382 md5_digest (boost::filesystem::path file)
384 ifstream f (file.string().c_str(), std::ios::binary);
386 throw OpenFileError (file.string());
389 f.seekg (0, std::ios::end);
390 int bytes = f.tellg ();
391 f.seekg (0, std::ios::beg);
393 int const buffer_size = 64 * 1024;
394 char buffer[buffer_size];
397 MD5_Init (&md5_context);
399 int const t = min (bytes, buffer_size);
401 MD5_Update (&md5_context, buffer, t);
405 unsigned char digest[MD5_DIGEST_LENGTH];
406 MD5_Final (digest, &md5_context);
409 for (int i = 0; i < MD5_DIGEST_LENGTH; ++i) {
410 s << std::hex << std::setfill('0') << std::setw(2) << ((int) digest[i]);
416 /** @param job Optional job for which to report progress */
418 md5_digest_directory (boost::filesystem::path directory, shared_ptr<Job> job)
420 int const buffer_size = 64 * 1024;
421 char buffer[buffer_size];
424 MD5_Init (&md5_context);
428 for (boost::filesystem::directory_iterator i(directory); i != boost::filesystem::directory_iterator(); ++i) {
434 for (boost::filesystem::directory_iterator i(directory); i != boost::filesystem::directory_iterator(); ++i) {
435 ifstream f (i->path().string().c_str(), std::ios::binary);
437 throw OpenFileError (i->path().string());
440 f.seekg (0, std::ios::end);
441 int bytes = f.tellg ();
442 f.seekg (0, std::ios::beg);
445 int const t = min (bytes, buffer_size);
447 MD5_Update (&md5_context, buffer, t);
452 job->set_progress (float (j) / files);
457 unsigned char digest[MD5_DIGEST_LENGTH];
458 MD5_Final (digest, &md5_context);
461 for (int i = 0; i < MD5_DIGEST_LENGTH; ++i) {
462 s << std::hex << std::setfill('0') << std::setw(2) << ((int) digest[i]);
469 about_equal (float a, float b)
471 /* A film of F seconds at f FPS will be Ff frames;
472 Consider some delta FPS d, so if we run the same
473 film at (f + d) FPS it will last F(f + d) seconds.
475 Hence the difference in length over the length of the film will
476 be F(f + d) - Ff frames
477 = Ff + Fd - Ff frames
481 So if we accept a difference of 1 frame, ie 1/f seconds, we can
488 So for a 3hr film, ie F = 3 * 60 * 60 = 10800, the acceptable
489 FPS error is 1/F ~= 0.0001 ~= 10-e4
492 return (fabs (a - b) < 1e-4);
495 /** @param An arbitrary audio frame rate.
496 * @return The appropriate DCP-approved frame rate (48kHz or 96kHz).
499 dcp_audio_frame_rate (int fs)
508 Socket::Socket (int timeout)
509 : _deadline (_io_service)
510 , _socket (_io_service)
513 _deadline.expires_at (boost::posix_time::pos_infin);
520 if (_deadline.expires_at() <= boost::asio::deadline_timer::traits_type::now ()) {
522 _deadline.expires_at (boost::posix_time::pos_infin);
525 _deadline.async_wait (boost::bind (&Socket::check, this));
528 /** Blocking connect.
529 * @param endpoint End-point to connect to.
532 Socket::connect (boost::asio::ip::basic_resolver_entry<boost::asio::ip::tcp> const & endpoint)
534 _deadline.expires_from_now (boost::posix_time::seconds (_timeout));
535 boost::system::error_code ec = boost::asio::error::would_block;
536 _socket.async_connect (endpoint, boost::lambda::var(ec) = boost::lambda::_1);
538 _io_service.run_one();
539 } while (ec == boost::asio::error::would_block);
541 if (ec || !_socket.is_open ()) {
542 throw NetworkError (_("connect timed out"));
547 * @param data Buffer to write.
548 * @param size Number of bytes to write.
551 Socket::write (uint8_t const * data, int size)
553 _deadline.expires_from_now (boost::posix_time::seconds (_timeout));
554 boost::system::error_code ec = boost::asio::error::would_block;
556 boost::asio::async_write (_socket, boost::asio::buffer (data, size), boost::lambda::var(ec) = boost::lambda::_1);
559 _io_service.run_one ();
560 } while (ec == boost::asio::error::would_block);
563 throw NetworkError (ec.message ());
568 Socket::write (uint32_t v)
571 write (reinterpret_cast<uint8_t*> (&v), 4);
575 * @param data Buffer to read to.
576 * @param size Number of bytes to read.
579 Socket::read (uint8_t* 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_read (_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 (ec.message ());
596 Socket::read_uint32 ()
599 read (reinterpret_cast<uint8_t *> (&v), 4);
603 /** Round a number up to the nearest multiple of another number.
605 * @param s Array of numbers to round, indexed by c.
606 * @param t Multiple to round to.
607 * @return Rounded number.
610 stride_round_up (int c, int const * stride, int t)
612 int const a = stride[c] + (t - 1);
616 /** Read a sequence of key / value pairs from a text stream;
617 * the keys are the first words on the line, and the values are
618 * the remainder of the line following the key. Lines beginning
619 * with # are ignored.
620 * @param s Stream to read.
621 * @return key/value pairs.
623 multimap<string, string>
624 read_key_value (istream &s)
626 multimap<string, string> kv;
629 while (getline (s, line)) {
634 if (line[0] == '#') {
638 if (line[line.size() - 1] == '\r') {
639 line = line.substr (0, line.size() - 1);
642 size_t const s = line.find (' ');
643 if (s == string::npos) {
647 kv.insert (make_pair (line.substr (0, s), line.substr (s + 1)));
654 get_required_string (multimap<string, string> const & kv, string k)
656 if (kv.count (k) > 1) {
657 throw StringError (N_("unexpected multiple keys in key-value set"));
660 multimap<string, string>::const_iterator i = kv.find (k);
662 if (i == kv.end ()) {
663 throw StringError (String::compose (_("missing key %1 in key-value set"), k));
670 get_required_int (multimap<string, string> const & kv, string k)
672 string const v = get_required_string (kv, k);
673 return lexical_cast<int> (v);
677 get_required_float (multimap<string, string> const & kv, string k)
679 string const v = get_required_string (kv, k);
680 return lexical_cast<float> (v);
684 get_optional_string (multimap<string, string> const & kv, string k)
686 if (kv.count (k) > 1) {
687 throw StringError (N_("unexpected multiple keys in key-value set"));
690 multimap<string, string>::const_iterator i = kv.find (k);
691 if (i == kv.end ()) {
699 get_optional_int (multimap<string, string> const & kv, string k)
701 if (kv.count (k) > 1) {
702 throw StringError (N_("unexpected multiple keys in key-value set"));
705 multimap<string, string>::const_iterator i = kv.find (k);
706 if (i == kv.end ()) {
710 return lexical_cast<int> (i->second);
713 /** Trip an assert if the caller is not in the UI thread */
717 assert (boost::this_thread::get_id() == ui_thread);
720 /** @param v Content video frame.
721 * @param audio_sample_rate Source audio sample rate.
722 * @param frames_per_second Number of video frames per second.
723 * @return Equivalent number of audio frames for `v'.
726 video_frames_to_audio_frames (VideoContent::Frame v, float audio_sample_rate, float frames_per_second)
728 return ((int64_t) v * audio_sample_rate / frames_per_second);
732 audio_channel_name (int c)
734 assert (MAX_AUDIO_CHANNELS == 6);
736 /* TRANSLATORS: these are the names of audio channels; Lfe (sub) is the low-frequency
737 enhancement channel (sub-woofer)./
739 string const channels[] = {
751 FrameRateConversion::FrameRateConversion (float source, int dcp)
754 , change_speed (false)
756 if (fabs (source / 2.0 - dcp) < (fabs (source - dcp))) {
758 } else if (fabs (source * 2 - dcp) < fabs (source - dcp)) {
762 change_speed = !about_equal (source * factor(), dcp);
764 if (!skip && !repeat && !change_speed) {
765 description = _("Content and DCP have the same rate.\n");
768 description = _("DCP will use every other frame of the content.\n");
770 description = _("Each content frame will be doubled in the DCP.\n");
774 float const pc = dcp * 100 / (source * factor());
775 description += String::compose (_("DCP will run at %1%% of the content speed.\n"), pc);
780 LocaleGuard::LocaleGuard ()
783 char const * old = setlocale (LC_NUMERIC, 0);
787 if (strcmp (_old, "C")) {
788 setlocale (LC_NUMERIC, "C");
793 LocaleGuard::~LocaleGuard ()
795 setlocale (LC_NUMERIC, _old);
800 valid_image_file (boost::filesystem::path f)
802 string ext = f.extension().string();
803 transform (ext.begin(), ext.end(), ext.begin(), ::tolower);
804 return (ext == ".tif" || ext == ".tiff" || ext == ".jpg" || ext == ".jpeg" || ext == ".png" || ext == ".bmp" || ext == ".tga");
808 tidy_for_filename (string f)
811 for (size_t i = 0; i < f.length(); ++i) {
812 if (isalnum (f[i]) || f[i] == '_' || f[i] == '-') {
822 shared_ptr<const libdcp::Signer>
825 boost::filesystem::path const sd = Config::instance()->signer_chain_directory ();
826 if (boost::filesystem::is_empty (sd)) {
827 libdcp::make_signer_chain (sd);
830 libdcp::CertificateChain chain;
833 boost::filesystem::path p (sd);
834 p /= "ca.self-signed.pem";
835 chain.add (shared_ptr<libdcp::Certificate> (new libdcp::Certificate (p)));
839 boost::filesystem::path p (sd);
840 p /= "intermediate.signed.pem";
841 chain.add (shared_ptr<libdcp::Certificate> (new libdcp::Certificate (p)));
845 boost::filesystem::path p (sd);
846 p /= "leaf.signed.pem";
847 chain.add (shared_ptr<libdcp::Certificate> (new libdcp::Certificate (p)));
850 boost::filesystem::path signer_key (sd);
851 signer_key /= "leaf.key";
853 return shared_ptr<const libdcp::Signer> (new libdcp::Signer (chain, signer_key));