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.
29 #ifdef DVDOMATIC_POSIX
33 #include <libssh/libssh.h>
35 #include <boost/algorithm/string.hpp>
36 #include <boost/bind.hpp>
37 #include <boost/lambda/lambda.hpp>
38 #include <boost/lexical_cast.hpp>
39 #include <boost/thread.hpp>
41 #include <openssl/md5.h>
42 #include <magick/MagickCore.h>
43 #include <magick/version.h>
44 #include <libdcp/version.h>
46 #include <libavcodec/avcodec.h>
47 #include <libavformat/avformat.h>
48 #include <libswscale/swscale.h>
49 #include <libavfilter/avfiltergraph.h>
50 #include <libpostproc/postprocess.h>
51 #include <libavutil/pixfmt.h>
54 #include "exceptions.h"
57 #include "dcp_content_type.h"
60 #include "sound_processor.h"
61 #ifndef DVDOMATIC_DISABLE_PLAYER
62 #include "player_manager.h"
66 using namespace boost;
70 /** Convert some number of seconds to a string representation
71 * in hours, minutes and seconds.
74 * @return String of the form H:M:S (where H is hours, M
75 * is minutes and S is seconds).
78 seconds_to_hms (int s)
88 hms << setfill ('0') << m << ":";
90 hms << setfill ('0') << s;
95 /** @param s Number of seconds.
96 * @return String containing an approximate description of s (e.g. "about 2 hours")
99 seconds_to_approximate_hms (int s)
110 ap << (h + 1) << " hours";
122 ap << m << " minutes";
125 ap << s << " seconds";
131 #ifdef DVDOMATIC_POSIX
132 /** @param l Mangled C++ identifier.
133 * @return Demangled version.
138 string::size_type const b = l.find_first_of ("(");
139 if (b == string::npos) {
143 string::size_type const p = l.find_last_of ("+");
144 if (p == string::npos) {
152 string const fn = l.substr (b + 1, p - b - 1);
157 char* realname = abi::__cxa_demangle (fn.c_str(), 0, 0, &status);
162 } catch (std::exception) {
169 /** Write a stacktrace to an ostream.
170 * @param out Stream to write to.
171 * @param levels Number of levels to go up the call stack.
174 stacktrace (ostream& out, int levels)
181 size = backtrace (array, 200);
182 strings = backtrace_symbols (array, size);
185 for (i = 0; i < size && (levels == 0 || i < size_t(levels)); i++) {
186 out << " " << demangle (strings[i]) << endl;
194 /** @return Version of vobcopy that is on the path (and hence that we will use) */
198 FILE* f = popen ("vobcopy -V 2>&1", "r");
200 throw EncodeError ("could not run vobcopy to check version");
203 string version = "unknown";
207 if (fgets (buf, sizeof (buf), f)) {
210 split (b, s, is_any_of (" "));
211 if (b.size() >= 2 && b[0] == "Vobcopy") {
222 /** @param v Version as used by FFmpeg.
223 * @return A string representation of v.
226 ffmpeg_version_to_string (int v)
229 s << ((v & 0xff0000) >> 16) << "." << ((v & 0xff00) >> 8) << "." << (v & 0xff);
233 /** Return a user-readable string summarising the versions of our dependencies */
235 dependency_version_summary ()
238 s << "libopenjpeg " << opj_version () << ", "
239 << "vobcopy " << vobcopy_version() << ", "
240 << "libavcodec " << ffmpeg_version_to_string (avcodec_version()) << ", "
241 << "libavfilter " << ffmpeg_version_to_string (avfilter_version()) << ", "
242 << "libavformat " << ffmpeg_version_to_string (avformat_version()) << ", "
243 << "libavutil " << ffmpeg_version_to_string (avutil_version()) << ", "
244 << "libpostproc " << ffmpeg_version_to_string (postproc_version()) << ", "
245 << "libswscale " << ffmpeg_version_to_string (swscale_version()) << ", "
246 << MagickVersion << ", "
247 << "libssh " << ssh_version (0) << ", "
248 << "libdcp " << libdcp::version << " git " << libdcp::git_commit;
254 seconds (struct timeval t)
256 return t.tv_sec + (double (t.tv_usec) / 1e6);
260 #ifdef DVDOMATIC_POSIX
262 sigchld_handler (int, siginfo_t* info, void *)
264 #ifndef DVDOMATIC_DISABLE_PLAYER
265 PlayerManager::instance()->child_exited (info->si_pid);
270 /** Call the required functions to set up DVD-o-matic's static arrays, etc.
271 * Must be called from the UI thread, if there is one.
276 Format::setup_formats ();
277 DCPContentType::setup_dcp_content_types ();
278 Scaler::setup_scalers ();
279 Filter::setup_filters ();
280 SoundProcessor::setup_sound_processors ();
282 ui_thread = this_thread::get_id ();
284 #ifdef DVDOMATIC_POSIX
286 sa.sa_flags = SA_SIGINFO;
287 sigemptyset (&sa.sa_mask);
288 sa.sa_sigaction = sigchld_handler;
289 sigaction (SIGCHLD, &sa, 0);
294 crop_string (Position start, Size size)
297 s << "crop=" << size.width << ":" << size.height << ":" << start.x << ":" << start.y;
302 split_at_spaces_considering_quotes (string s)
305 bool in_quotes = false;
307 for (string::size_type i = 0; i < s.length(); ++i) {
308 if (s[i] == ' ' && !in_quotes) {
311 } else if (s[i] == '"') {
312 in_quotes = !in_quotes;
323 md5_digest (void const * data, int size)
326 MD5_Init (&md5_context);
327 MD5_Update (&md5_context, data, size);
328 unsigned char digest[MD5_DIGEST_LENGTH];
329 MD5_Final (digest, &md5_context);
332 for (int i = 0; i < MD5_DIGEST_LENGTH; ++i) {
333 s << hex << setfill('0') << setw(2) << ((int) digest[i]);
339 /** @param file File name.
340 * @return MD5 digest of file's contents.
343 md5_digest (string file)
345 ifstream f (file.c_str(), ios::binary);
347 throw OpenFileError (file);
350 f.seekg (0, ios::end);
351 int bytes = f.tellg ();
352 f.seekg (0, ios::beg);
354 int const buffer_size = 64 * 1024;
355 char buffer[buffer_size];
358 MD5_Init (&md5_context);
360 int const t = min (bytes, buffer_size);
362 MD5_Update (&md5_context, buffer, t);
366 unsigned char digest[MD5_DIGEST_LENGTH];
367 MD5_Final (digest, &md5_context);
370 for (int i = 0; i < MD5_DIGEST_LENGTH; ++i) {
371 s << hex << setfill('0') << setw(2) << ((int) digest[i]);
377 /** @param An arbitrary sampling rate.
378 * @return The appropriate DCP-approved sampling rate (48kHz or 96kHz).
381 dcp_audio_sample_rate (int fs)
390 bool operator== (Crop const & a, Crop const & b)
392 return (a.left == b.left && a.right == b.right && a.top == b.top && a.bottom == b.bottom);
395 bool operator!= (Crop const & a, Crop const & b)
400 /** @param index Colour LUT index.
401 * @return Human-readable name.
404 colour_lut_index_to_name (int index)
418 : _deadline (_io_service)
419 , _socket (_io_service)
422 _deadline.expires_at (posix_time::pos_infin);
429 if (_deadline.expires_at() <= asio::deadline_timer::traits_type::now ()) {
431 _deadline.expires_at (posix_time::pos_infin);
434 _deadline.async_wait (boost::bind (&Socket::check, this));
437 /** Blocking connect with timeout.
438 * @param endpoint End-point to connect to.
439 * @param timeout Time-out in seconds.
442 Socket::connect (asio::ip::basic_resolver_entry<asio::ip::tcp> const & endpoint, int timeout)
444 system::error_code ec = asio::error::would_block;
445 _socket.async_connect (endpoint, lambda::var(ec) = lambda::_1);
447 _io_service.run_one();
448 } while (ec == asio::error::would_block);
450 if (ec || !_socket.is_open ()) {
451 throw NetworkError ("connect timed out");
455 /** Blocking write with timeout.
456 * @param data Buffer to write.
457 * @param size Number of bytes to write.
458 * @param timeout Time-out, in seconds.
461 Socket::write (uint8_t const * data, int size, int timeout)
463 _deadline.expires_from_now (posix_time::seconds (timeout));
464 system::error_code ec = asio::error::would_block;
466 asio::async_write (_socket, asio::buffer (data, size), lambda::var(ec) = lambda::_1);
468 _io_service.run_one ();
469 } while (ec == asio::error::would_block);
472 throw NetworkError ("write timed out");
476 /** Blocking read with timeout.
477 * @param data Buffer to read to.
478 * @param size Number of bytes to read.
479 * @param timeout Time-out, in seconds.
482 Socket::read (uint8_t* data, int size, int timeout)
484 _deadline.expires_from_now (posix_time::seconds (timeout));
485 system::error_code ec = asio::error::would_block;
489 _socket.async_read_some (
490 asio::buffer (data, size),
491 (lambda::var(ec) = lambda::_1, lambda::var(amount_read) = lambda::_2)
495 _io_service.run_one ();
496 } while (ec == asio::error::would_block);
505 /** Mark some data as being `consumed', so that it will not be returned
507 * @param size Amount of data to consume, in bytes.
510 Socket::consume (int size)
512 assert (_buffer_data >= size);
514 _buffer_data -= size;
515 if (_buffer_data > 0) {
516 /* Shift still-valid data to the start of the buffer */
517 memmove (_buffer, _buffer + size, _buffer_data);
521 /** Read a definite amount of data from our socket, and mark
523 * @param data Where to put the data.
524 * @param size Number of bytes to read.
527 Socket::read_definite_and_consume (uint8_t* data, int size, int timeout)
529 int const from_buffer = min (_buffer_data, size);
530 if (from_buffer > 0) {
531 /* Get data from our buffer */
532 memcpy (data, _buffer, from_buffer);
533 consume (from_buffer);
534 /* Update our output state */
539 /* read() the rest */
541 int const n = read (data, size, timeout);
543 throw NetworkError ("could not read");
551 /** Read as much data as is available, up to some limit.
552 * @param data Where to put the data.
553 * @param size Maximum amount of data to read.
556 Socket::read_indefinite (uint8_t* data, int size, int timeout)
558 assert (size < int (sizeof (_buffer)));
560 /* Amount of extra data we need to read () */
561 int to_read = size - _buffer_data;
562 while (to_read > 0) {
563 /* read as much of it as we can (into our buffer) */
564 int const n = read (_buffer + _buffer_data, to_read, timeout);
566 throw NetworkError ("could not read");
573 assert (_buffer_data >= size);
575 /* copy data into the output buffer */
576 assert (size >= _buffer_data);
577 memcpy (data, _buffer, size);
581 Rect::intersection (Rect const & other) const
583 int const tx = max (x, other.x);
584 int const ty = max (y, other.y);
588 min (x + width, other.x + other.width) - tx,
589 min (y + height, other.y + other.height) - ty
593 /** Round a number up to the nearest multiple of another number.
594 * @param a Number to round.
595 * @param t Multiple to round to.
596 * @return Rounded number.
600 round_up (int a, int t)
606 /** Read a sequence of key / value pairs from a text stream;
607 * the keys are the first words on the line, and the values are
608 * the remainder of the line following the key. Lines beginning
609 * with # are ignored.
610 * @param s Stream to read.
611 * @return key/value pairs.
613 multimap<string, string>
614 read_key_value (istream &s)
616 multimap<string, string> kv;
619 while (getline (s, line)) {
624 if (line[0] == '#') {
628 if (line[line.size() - 1] == '\r') {
629 line = line.substr (0, line.size() - 1);
632 size_t const s = line.find (' ');
633 if (s == string::npos) {
637 kv.insert (make_pair (line.substr (0, s), line.substr (s + 1)));
644 get_required_string (multimap<string, string> const & kv, string k)
646 if (kv.count (k) > 1) {
647 throw StringError ("unexpected multiple keys in key-value set");
650 multimap<string, string>::const_iterator i = kv.find (k);
652 if (i == kv.end ()) {
653 throw StringError (String::compose ("missing key %1 in key-value set", k));
660 get_required_int (multimap<string, string> const & kv, string k)
662 string const v = get_required_string (kv, k);
663 return lexical_cast<int> (v);
667 get_required_float (multimap<string, string> const & kv, string k)
669 string const v = get_required_string (kv, k);
670 return lexical_cast<float> (v);
674 get_optional_string (multimap<string, string> const & kv, string k)
676 if (kv.count (k) > 1) {
677 throw StringError ("unexpected multiple keys in key-value set");
680 multimap<string, string>::const_iterator i = kv.find (k);
681 if (i == kv.end ()) {
689 get_optional_int (multimap<string, string> const & kv, string k)
691 if (kv.count (k) > 1) {
692 throw StringError ("unexpected multiple keys in key-value set");
695 multimap<string, string>::const_iterator i = kv.find (k);
696 if (i == kv.end ()) {
700 return lexical_cast<int> (i->second);
703 AudioBuffers::AudioBuffers (int channels, int frames)
704 : _channels (channels)
707 _data = new float*[_channels];
708 for (int i = 0; i < _channels; ++i) {
709 _data[i] = new float[frames];
713 AudioBuffers::~AudioBuffers ()
715 for (int i = 0; i < _channels; ++i) {
723 AudioBuffers::data (int c) const
725 assert (c >= 0 && c < _channels);
730 AudioBuffers::set_frames (int f)
732 assert (f <= _frames);
737 AudioBuffers::make_silent ()
739 for (int i = 0; i < _channels; ++i) {
740 for (int j = 0; j < _frames; ++j) {
749 assert (this_thread::get_id() == ui_thread);