2 Copyright (C) 2012-2016 Carl Hetherington <cth@carlh.net>
4 This file is part of DCP-o-matic.
6 DCP-o-matic is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 DCP-o-matic is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with DCP-o-matic. If not, see <http://www.gnu.org/licenses/>.
21 /** @file src/lib/util.cc
22 * @brief Some utility functions and classes.
26 #include "exceptions.h"
27 #include "dcp_content_type.h"
29 #include "cinema_sound_processor.h"
34 #include "video_content.h"
37 #include "audio_processor.h"
38 #include "compose.hpp"
40 #include <dcp/picture_asset.h>
41 #include <dcp/sound_asset.h>
42 #include <dcp/subtitle_asset.h>
44 #include <libavfilter/avfilter.h>
45 #include <libavcodec/avcodec.h>
47 #include <curl/curl.h>
48 #ifdef DCPOMATIC_GRAPHICS_MAGICK
52 #include <pangomm/init.h>
53 #include <boost/algorithm/string.hpp>
54 #include <boost/thread.hpp>
55 #include <boost/filesystem.hpp>
56 #ifdef DCPOMATIC_WINDOWS
57 #include <boost/locale.hpp>
66 #ifdef DCPOMATIC_POSIX
87 using std::set_terminate;
88 using boost::shared_ptr;
90 using boost::optional;
91 using boost::lexical_cast;
92 using boost::bad_lexical_cast;
94 using dcp::raw_convert;
96 /** Path to our executable, required by the stacktrace stuff and filled
97 * in during App::onInit().
100 static boost::thread::id ui_thread;
101 static boost::filesystem::path backtrace_file;
103 /** Convert some number of seconds to a string representation
104 * in hours, minutes and seconds.
107 * @return String of the form H:M:S (where H is hours, M
108 * is minutes and S is seconds).
111 seconds_to_hms (int s)
119 snprintf (buffer, sizeof(buffer), "%d:%02d:%02d", h, m, s);
123 /** @param s Number of seconds.
124 * @return String containing an approximate description of s (e.g. "about 2 hours")
127 seconds_to_approximate_hms (int s)
136 bool const hours = h > 0;
137 bool const minutes = h < 6 && m > 0;
138 bool const seconds = h == 0 && m < 10 && s > 0;
141 if (m > 30 && !minutes) {
142 /// TRANSLATORS: h here is an abbreviation for hours
143 ap += raw_convert<string>(h + 1) + _("h");
145 /// TRANSLATORS: h here is an abbreviation for hours
146 ap += raw_convert<string>(h) + _("h");
149 if (minutes || seconds) {
156 if (s > 30 && !seconds) {
157 /// TRANSLATORS: m here is an abbreviation for minutes
158 ap += raw_convert<string>(m + 1) + _("m");
160 /// TRANSLATORS: m here is an abbreviation for minutes
161 ap += raw_convert<string>(m) + _("m");
171 /// TRANSLATORS: s here is an abbreviation for seconds
172 ap += raw_convert<string>(s) + _("s");
179 seconds (struct timeval t)
181 return t.tv_sec + (double (t.tv_usec) / 1e6);
184 #ifdef DCPOMATIC_WINDOWS
186 /** Resolve symbol name and source location given the path to the executable */
188 addr2line (void const * const addr)
190 char addr2line_cmd[512] = { 0 };
191 sprintf (addr2line_cmd, "addr2line -f -p -e %.256s %p > %s", program_name.c_str(), addr, backtrace_file.string().c_str());
192 return system(addr2line_cmd);
195 /** This is called when C signals occur on Windows (e.g. SIGSEGV)
196 * (NOT C++ exceptions!). We write a backtrace to backtrace_file by dark means.
197 * Adapted from code here: http://spin.atomicobject.com/2013/01/13/exceptions-stack-traces-c/
200 exception_handler(struct _EXCEPTION_POINTERS * info)
202 FILE* f = fopen_boost (backtrace_file, "w");
203 fprintf (f, "C-style exception %d\n", info->ExceptionRecord->ExceptionCode);
206 if (info->ExceptionRecord->ExceptionCode != EXCEPTION_STACK_OVERFLOW) {
207 CONTEXT* context = info->ContextRecord;
208 SymInitialize (GetCurrentProcess (), 0, true);
210 STACKFRAME frame = { 0 };
212 /* setup initial stack frame */
214 frame.AddrPC.Offset = context->Rip;
215 frame.AddrStack.Offset = context->Rsp;
216 frame.AddrFrame.Offset = context->Rbp;
218 frame.AddrPC.Offset = context->Eip;
219 frame.AddrStack.Offset = context->Esp;
220 frame.AddrFrame.Offset = context->Ebp;
222 frame.AddrPC.Mode = AddrModeFlat;
223 frame.AddrStack.Mode = AddrModeFlat;
224 frame.AddrFrame.Mode = AddrModeFlat;
228 IMAGE_FILE_MACHINE_I386,
229 GetCurrentProcess (),
234 SymFunctionTableAccess,
239 addr2line((void *) frame.AddrPC.Offset);
243 addr2line ((void *) info->ContextRecord->Rip);
245 addr2line ((void *) info->ContextRecord->Eip);
249 return EXCEPTION_CONTINUE_SEARCH;
254 set_backtrace_file (boost::filesystem::path p)
259 /** This is called when there is an unhandled exception. Any
260 * backtrace in this function is useless on Windows as the stack has
261 * already been unwound from the throw; we have the gdb wrap hack to
268 static bool tried_throw = false;
269 // try once to re-throw currently active exception
275 catch (const std::exception &e) {
276 std::cerr << __FUNCTION__ << " caught unhandled exception. what(): "
277 << e.what() << std::endl;
280 std::cerr << __FUNCTION__ << " caught unknown/unhandled exception."
288 dcpomatic_setup_path_encoding ()
290 #ifdef DCPOMATIC_WINDOWS
291 /* Dark voodoo which, I think, gets boost::filesystem::path to
292 correctly convert UTF-8 strings to paths, and also paths
293 back to UTF-8 strings (on path::string()).
295 After this, constructing boost::filesystem::paths from strings
296 converts from UTF-8 to UTF-16 inside the path. Then
297 path::string().c_str() gives UTF-8 and
298 path::c_str() gives UTF-16.
300 This is all Windows-only. AFAICT Linux/OS X use UTF-8 everywhere,
301 so things are much simpler.
303 std::locale::global (boost::locale::generator().generate (""));
304 boost::filesystem::path::imbue (std::locale ());
308 /** Call the required functions to set up DCP-o-matic's static arrays, etc.
309 * Must be called from the UI thread, if there is one.
314 #ifdef DCPOMATIC_WINDOWS
315 boost::filesystem::path p = g_get_user_config_dir ();
316 p /= "backtrace.txt";
317 set_backtrace_file (p);
318 SetUnhandledExceptionFilter(exception_handler);
321 avfilter_register_all ();
324 /* Add our lib directory to the libltdl search path so that
325 xmlsec can find xmlsec1-openssl.
327 boost::filesystem::path lib = app_contents ();
329 setenv ("LTDL_LIBRARY_PATH", lib.c_str (), 1);
332 set_terminate (terminate);
337 Ratio::setup_ratios ();
338 PresetColourConversion::setup_colour_conversion_presets ();
339 VideoContentScale::setup_scales ();
340 DCPContentType::setup_dcp_content_types ();
341 Filter::setup_filters ();
342 CinemaSoundProcessor::setup_cinema_sound_processors ();
343 AudioProcessor::setup_audio_processors ();
345 curl_global_init (CURL_GLOBAL_ALL);
347 #ifdef DCPOMATIC_GRAPHICS_MAGICK
348 Magick::InitializeMagick (0);
351 ui_thread = boost::this_thread::get_id ();
354 #ifdef DCPOMATIC_WINDOWS
355 boost::filesystem::path
359 GetModuleFileName (0, buffer, 512 * sizeof(wchar_t));
360 boost::filesystem::path p (buffer);
361 p = p.parent_path ();
362 p = p.parent_path ();
369 boost::filesystem::path
372 return "DCP-o-matic 2.app/Contents/Resources";
377 dcpomatic_setup_gettext_i18n (string lang)
379 #ifdef DCPOMATIC_LINUX
383 if (!lang.empty ()) {
384 /* Override our environment language. Note that the caller must not
385 free the string passed into putenv().
387 string s = String::compose ("LANGUAGE=%1", lang);
388 putenv (strdup (s.c_str ()));
389 s = String::compose ("LANG=%1", lang);
390 putenv (strdup (s.c_str ()));
391 s = String::compose ("LC_ALL=%1", lang);
392 putenv (strdup (s.c_str ()));
395 setlocale (LC_ALL, "");
396 textdomain ("libdcpomatic2");
398 #if defined(DCPOMATIC_WINDOWS) || defined(DCPOMATIC_OSX)
399 bindtextdomain ("libdcpomatic2", mo_path().string().c_str());
400 bind_textdomain_codeset ("libdcpomatic2", "UTF8");
403 #ifdef DCPOMATIC_LINUX
404 bindtextdomain ("libdcpomatic2", LINUX_LOCALE_PREFIX);
408 /** Compute a digest of the first and last `size' bytes of a set of files. */
410 digest_head_tail (vector<boost::filesystem::path> files, boost::uintmax_t size)
412 boost::scoped_array<char> buffer (new char[size]);
416 boost::uintmax_t to_do = size;
417 char* p = buffer.get ();
419 while (i < int64_t (files.size()) && to_do > 0) {
420 FILE* f = fopen_boost (files[i], "rb");
422 throw OpenFileError (files[i].string());
425 boost::uintmax_t this_time = min (to_do, boost::filesystem::file_size (files[i]));
426 fread (p, 1, this_time, f);
433 digester.add (buffer.get(), size - to_do);
438 i = files.size() - 1;
439 while (i >= 0 && to_do > 0) {
440 FILE* f = fopen_boost (files[i], "rb");
442 throw OpenFileError (files[i].string());
445 boost::uintmax_t this_time = min (to_do, boost::filesystem::file_size (files[i]));
446 dcpomatic_fseek (f, -this_time, SEEK_END);
447 fread (p, 1, this_time, f);
454 digester.add (buffer.get(), size - to_do);
456 return digester.get ();
459 /** Round a number up to the nearest multiple of another number.
461 * @param s Array of numbers to round, indexed by c.
462 * @param t Multiple to round to.
463 * @return Rounded number.
466 stride_round_up (int c, int const * stride, int t)
468 int const a = stride[c] + (t - 1);
472 /** Trip an assert if the caller is not in the UI thread */
476 DCPOMATIC_ASSERT (boost::this_thread::get_id() == ui_thread);
480 audio_channel_name (int c)
482 DCPOMATIC_ASSERT (MAX_DCP_AUDIO_CHANNELS == 16);
484 /// TRANSLATORS: these are the names of audio channels; Lfe (sub) is the low-frequency
485 /// enhancement channel (sub-woofer). HI is the hearing-impaired audio track and
486 /// VI is the visually-impaired audio track (audio describe).
487 string const channels[] = {
494 _("Hearing impaired"),
495 _("Visually impaired"),
498 _("Left rear surround"),
499 _("Right rear surround"),
501 _("D-BOX secondary"),
510 valid_image_file (boost::filesystem::path f)
512 if (boost::starts_with (f.leaf().string(), "._")) {
516 string ext = f.extension().string();
517 transform (ext.begin(), ext.end(), ext.begin(), ::tolower);
519 ext == ".tif" || ext == ".tiff" || ext == ".jpg" || ext == ".jpeg" ||
520 ext == ".png" || ext == ".bmp" || ext == ".tga" || ext == ".dpx" ||
521 ext == ".j2c" || ext == ".j2k" || ext == ".jp2"
526 valid_j2k_file (boost::filesystem::path f)
528 string ext = f.extension().string();
529 transform (ext.begin(), ext.end(), ext.begin(), ::tolower);
530 return (ext == ".j2k" || ext == ".j2c" || ext == ".jp2");
534 tidy_for_filename (string f)
537 for (size_t i = 0; i < f.length(); ++i) {
538 if (isalnum (f[i]) || f[i] == '_' || f[i] == '-') {
549 fit_ratio_within (float ratio, dcp::Size full_frame)
551 if (ratio < full_frame.ratio ()) {
552 return dcp::Size (lrintf (full_frame.height * ratio), full_frame.height);
555 return dcp::Size (full_frame.width, lrintf (full_frame.width / ratio));
559 wrapped_av_malloc (size_t s)
561 void* p = av_malloc (s);
569 split_get_request (string url)
572 AWAITING_QUESTION_MARK,
575 } state = AWAITING_QUESTION_MARK;
577 map<string, string> r;
580 for (size_t i = 0; i < url.length(); ++i) {
582 case AWAITING_QUESTION_MARK:
597 r.insert (make_pair (k, v));
607 if (state == VALUE) {
608 r.insert (make_pair (k, v));
615 video_asset_filename (shared_ptr<dcp::PictureAsset> asset, int reel_index, int reel_count, optional<string> summary)
617 dcp::NameFormat::Map values;
619 values['i'] = asset->id();
620 values['r'] = raw_convert<string> (reel_index + 1);
621 values['n'] = raw_convert<string> (reel_count);
623 values['c'] = summary.get();
625 return Config::instance()->dcp_asset_filename_format().get(values) + ".mxf";
629 audio_asset_filename (shared_ptr<dcp::SoundAsset> asset, int reel_index, int reel_count, optional<string> summary)
631 dcp::NameFormat::Map values;
633 values['i'] = asset->id();
634 values['r'] = raw_convert<string> (reel_index + 1);
635 values['n'] = raw_convert<string> (reel_count);
637 values['c'] = summary.get();
639 return Config::instance()->dcp_asset_filename_format().get(values) + ".mxf";
643 relaxed_string_to_float (string s)
646 boost::algorithm::replace_all (s, ",", ".");
647 return lexical_cast<float> (s);
648 } catch (bad_lexical_cast) {
649 boost::algorithm::replace_all (s, ".", ",");
650 return lexical_cast<float> (s);
655 string_not_empty (string s)