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>
40 #include <boost/filesystem.hpp>
42 #include <openssl/md5.h>
43 #include <magick/MagickCore.h>
44 #include <magick/version.h>
45 #include <libdcp/version.h>
47 #include <libavcodec/avcodec.h>
48 #include <libavformat/avformat.h>
49 #include <libswscale/swscale.h>
50 #include <libavfilter/avfiltergraph.h>
51 #include <libpostproc/postprocess.h>
52 #include <libavutil/pixfmt.h>
55 #include "exceptions.h"
58 #include "dcp_content_type.h"
61 #include "sound_processor.h"
62 #ifndef DVDOMATIC_DISABLE_PLAYER
63 #include "player_manager.h"
67 using namespace boost;
71 /** Convert some number of seconds to a string representation
72 * in hours, minutes and seconds.
75 * @return String of the form H:M:S (where H is hours, M
76 * is minutes and S is seconds).
79 seconds_to_hms (int s)
89 hms << setfill ('0') << m << ":";
91 hms << setfill ('0') << s;
96 /** @param s Number of seconds.
97 * @return String containing an approximate description of s (e.g. "about 2 hours")
100 seconds_to_approximate_hms (int s)
111 ap << (h + 1) << " hours";
123 ap << m << " minutes";
126 ap << s << " seconds";
132 #ifdef DVDOMATIC_POSIX
133 /** @param l Mangled C++ identifier.
134 * @return Demangled version.
139 string::size_type const b = l.find_first_of ("(");
140 if (b == string::npos) {
144 string::size_type const p = l.find_last_of ("+");
145 if (p == string::npos) {
153 string const fn = l.substr (b + 1, p - b - 1);
158 char* realname = abi::__cxa_demangle (fn.c_str(), 0, 0, &status);
163 } catch (std::exception) {
170 /** Write a stacktrace to an ostream.
171 * @param out Stream to write to.
172 * @param levels Number of levels to go up the call stack.
175 stacktrace (ostream& out, int levels)
182 size = backtrace (array, 200);
183 strings = backtrace_symbols (array, size);
186 for (i = 0; i < size && (levels == 0 || i < size_t(levels)); i++) {
187 out << " " << demangle (strings[i]) << endl;
195 /** @return Version of vobcopy that is on the path (and hence that we will use) */
199 FILE* f = popen ("vobcopy -V 2>&1", "r");
201 throw EncodeError ("could not run vobcopy to check version");
204 string version = "unknown";
208 if (fgets (buf, sizeof (buf), f)) {
211 split (b, s, is_any_of (" "));
212 if (b.size() >= 2 && b[0] == "Vobcopy") {
223 /** @param v Version as used by FFmpeg.
224 * @return A string representation of v.
227 ffmpeg_version_to_string (int v)
230 s << ((v & 0xff0000) >> 16) << "." << ((v & 0xff00) >> 8) << "." << (v & 0xff);
234 /** Return a user-readable string summarising the versions of our dependencies */
236 dependency_version_summary ()
239 s << "libopenjpeg " << opj_version () << ", "
240 << "vobcopy " << vobcopy_version() << ", "
241 << "libavcodec " << ffmpeg_version_to_string (avcodec_version()) << ", "
242 << "libavfilter " << ffmpeg_version_to_string (avfilter_version()) << ", "
243 << "libavformat " << ffmpeg_version_to_string (avformat_version()) << ", "
244 << "libavutil " << ffmpeg_version_to_string (avutil_version()) << ", "
245 << "libpostproc " << ffmpeg_version_to_string (postproc_version()) << ", "
246 << "libswscale " << ffmpeg_version_to_string (swscale_version()) << ", "
247 << MagickVersion << ", "
248 << "libssh " << ssh_version (0) << ", "
249 << "libdcp " << libdcp::version << " git " << libdcp::git_commit;
255 seconds (struct timeval t)
257 return t.tv_sec + (double (t.tv_usec) / 1e6);
261 #ifdef DVDOMATIC_POSIX
263 sigchld_handler (int, siginfo_t* info, void *)
265 #ifndef DVDOMATIC_DISABLE_PLAYER
266 PlayerManager::instance()->child_exited (info->si_pid);
271 /** Call the required functions to set up DVD-o-matic's static arrays, etc.
272 * Must be called from the UI thread, if there is one.
277 Format::setup_formats ();
278 DCPContentType::setup_dcp_content_types ();
279 Scaler::setup_scalers ();
280 Filter::setup_filters ();
281 SoundProcessor::setup_sound_processors ();
283 ui_thread = this_thread::get_id ();
285 #ifdef DVDOMATIC_POSIX
287 sa.sa_flags = SA_SIGINFO;
288 sigemptyset (&sa.sa_mask);
289 sa.sa_sigaction = sigchld_handler;
290 sigaction (SIGCHLD, &sa, 0);
294 /** @param start Start position for the crop within the image.
295 * @param size Size of the cropped area.
296 * @return FFmpeg crop filter string.
299 crop_string (Position start, Size size)
302 s << "crop=" << size.width << ":" << size.height << ":" << start.x << ":" << start.y;
306 /** @param s A string.
307 * @return Parts of the string split at spaces, except when a space is within quotation marks.
310 split_at_spaces_considering_quotes (string s)
313 bool in_quotes = false;
315 for (string::size_type i = 0; i < s.length(); ++i) {
316 if (s[i] == ' ' && !in_quotes) {
319 } else if (s[i] == '"') {
320 in_quotes = !in_quotes;
331 md5_digest (void const * data, int size)
334 MD5_Init (&md5_context);
335 MD5_Update (&md5_context, data, size);
336 unsigned char digest[MD5_DIGEST_LENGTH];
337 MD5_Final (digest, &md5_context);
340 for (int i = 0; i < MD5_DIGEST_LENGTH; ++i) {
341 s << hex << setfill('0') << setw(2) << ((int) digest[i]);
347 /** @param file File name.
348 * @return MD5 digest of file's contents.
351 md5_digest (string file)
353 ifstream f (file.c_str(), ios::binary);
355 throw OpenFileError (file);
358 f.seekg (0, ios::end);
359 int bytes = f.tellg ();
360 f.seekg (0, ios::beg);
362 int const buffer_size = 64 * 1024;
363 char buffer[buffer_size];
366 MD5_Init (&md5_context);
368 int const t = min (bytes, buffer_size);
370 MD5_Update (&md5_context, buffer, t);
374 unsigned char digest[MD5_DIGEST_LENGTH];
375 MD5_Final (digest, &md5_context);
378 for (int i = 0; i < MD5_DIGEST_LENGTH; ++i) {
379 s << hex << setfill('0') << setw(2) << ((int) digest[i]);
385 /** @param fps Arbitrary frames-per-second value.
386 * @return DCPFrameRate for this frames-per-second.
389 dcp_frame_rate (float fps)
393 dfr.run_fast = (fps != rint (fps));
394 dfr.frames_per_second = rint (fps);
397 /* XXX: somewhat arbitrary */
399 dfr.frames_per_second = 25;
406 /** @param An arbitrary sampling rate.
407 * @return The appropriate DCP-approved sampling rate (48kHz or 96kHz).
410 dcp_audio_sample_rate (int fs)
419 bool operator== (Size const & a, Size const & b)
421 return (a.width == b.width && a.height == b.height);
424 bool operator== (Crop const & a, Crop const & b)
426 return (a.left == b.left && a.right == b.right && a.top == b.top && a.bottom == b.bottom);
429 bool operator!= (Crop const & a, Crop const & b)
434 /** @param index Colour LUT index.
435 * @return Human-readable name.
438 colour_lut_index_to_name (int index)
452 : _deadline (_io_service)
453 , _socket (_io_service)
456 _deadline.expires_at (posix_time::pos_infin);
463 if (_deadline.expires_at() <= asio::deadline_timer::traits_type::now ()) {
465 _deadline.expires_at (posix_time::pos_infin);
468 _deadline.async_wait (boost::bind (&Socket::check, this));
471 /** Blocking connect with timeout.
472 * @param endpoint End-point to connect to.
473 * @param timeout Time-out in seconds.
476 Socket::connect (asio::ip::basic_resolver_entry<asio::ip::tcp> const & endpoint, int timeout)
478 system::error_code ec = asio::error::would_block;
479 _socket.async_connect (endpoint, lambda::var(ec) = lambda::_1);
481 _io_service.run_one();
482 } while (ec == asio::error::would_block);
484 if (ec || !_socket.is_open ()) {
485 throw NetworkError ("connect timed out");
489 /** Blocking write with timeout.
490 * @param data Buffer to write.
491 * @param size Number of bytes to write.
492 * @param timeout Time-out, in seconds.
495 Socket::write (uint8_t const * data, int size, int timeout)
497 _deadline.expires_from_now (posix_time::seconds (timeout));
498 system::error_code ec = asio::error::would_block;
500 asio::async_write (_socket, asio::buffer (data, size), lambda::var(ec) = lambda::_1);
502 _io_service.run_one ();
503 } while (ec == asio::error::would_block);
506 throw NetworkError ("write timed out");
510 /** Blocking read with timeout.
511 * @param data Buffer to read to.
512 * @param size Number of bytes to read.
513 * @param timeout Time-out, in seconds.
516 Socket::read (uint8_t* data, int size, int timeout)
518 _deadline.expires_from_now (posix_time::seconds (timeout));
519 system::error_code ec = asio::error::would_block;
523 _socket.async_read_some (
524 asio::buffer (data, size),
525 (lambda::var(ec) = lambda::_1, lambda::var(amount_read) = lambda::_2)
529 _io_service.run_one ();
530 } while (ec == asio::error::would_block);
539 /** Mark some data as being `consumed', so that it will not be returned
541 * @param size Amount of data to consume, in bytes.
544 Socket::consume (int size)
546 assert (_buffer_data >= size);
548 _buffer_data -= size;
549 if (_buffer_data > 0) {
550 /* Shift still-valid data to the start of the buffer */
551 memmove (_buffer, _buffer + size, _buffer_data);
555 /** Read a definite amount of data from our socket, and mark
557 * @param data Where to put the data.
558 * @param size Number of bytes to read.
561 Socket::read_definite_and_consume (uint8_t* data, int size, int timeout)
563 int const from_buffer = min (_buffer_data, size);
564 if (from_buffer > 0) {
565 /* Get data from our buffer */
566 memcpy (data, _buffer, from_buffer);
567 consume (from_buffer);
568 /* Update our output state */
573 /* read() the rest */
575 int const n = read (data, size, timeout);
577 throw NetworkError ("could not read");
585 /** Read as much data as is available, up to some limit.
586 * @param data Where to put the data.
587 * @param size Maximum amount of data to read.
590 Socket::read_indefinite (uint8_t* data, int size, int timeout)
592 assert (size < int (sizeof (_buffer)));
594 /* Amount of extra data we need to read () */
595 int to_read = size - _buffer_data;
596 while (to_read > 0) {
597 /* read as much of it as we can (into our buffer) */
598 int const n = read (_buffer + _buffer_data, to_read, timeout);
600 throw NetworkError ("could not read");
607 assert (_buffer_data >= size);
609 /* copy data into the output buffer */
610 assert (size >= _buffer_data);
611 memcpy (data, _buffer, size);
614 /** @param other A Rect.
615 * @return The intersection of this with `other'.
618 Rect::intersection (Rect const & other) const
620 int const tx = max (x, other.x);
621 int const ty = max (y, other.y);
625 min (x + width, other.x + other.width) - tx,
626 min (y + height, other.y + other.height) - ty
630 /** Round a number up to the nearest multiple of another number.
631 * @param a Number to round.
632 * @param t Multiple to round to.
633 * @return Rounded number.
636 stride_round_up (int c, int const * stride, int t)
638 int const a = stride[c] + (t - 1);
643 stride_lookup (int c, int const * stride)
648 /** Read a sequence of key / value pairs from a text stream;
649 * the keys are the first words on the line, and the values are
650 * the remainder of the line following the key. Lines beginning
651 * with # are ignored.
652 * @param s Stream to read.
653 * @return key/value pairs.
655 multimap<string, string>
656 read_key_value (istream &s)
658 multimap<string, string> kv;
661 while (getline (s, line)) {
666 if (line[0] == '#') {
670 if (line[line.size() - 1] == '\r') {
671 line = line.substr (0, line.size() - 1);
674 size_t const s = line.find (' ');
675 if (s == string::npos) {
679 kv.insert (make_pair (line.substr (0, s), line.substr (s + 1)));
686 get_required_string (multimap<string, string> const & kv, string k)
688 if (kv.count (k) > 1) {
689 throw StringError ("unexpected multiple keys in key-value set");
692 multimap<string, string>::const_iterator i = kv.find (k);
694 if (i == kv.end ()) {
695 throw StringError (String::compose ("missing key %1 in key-value set", k));
702 get_required_int (multimap<string, string> const & kv, string k)
704 string const v = get_required_string (kv, k);
705 return lexical_cast<int> (v);
709 get_required_float (multimap<string, string> const & kv, string k)
711 string const v = get_required_string (kv, k);
712 return lexical_cast<float> (v);
716 get_optional_string (multimap<string, string> const & kv, string k)
718 if (kv.count (k) > 1) {
719 throw StringError ("unexpected multiple keys in key-value set");
722 multimap<string, string>::const_iterator i = kv.find (k);
723 if (i == kv.end ()) {
731 get_optional_int (multimap<string, string> const & kv, string k)
733 if (kv.count (k) > 1) {
734 throw StringError ("unexpected multiple keys in key-value set");
737 multimap<string, string>::const_iterator i = kv.find (k);
738 if (i == kv.end ()) {
742 return lexical_cast<int> (i->second);
745 /** Construct an AudioBuffers. Audio data is undefined after this constructor.
746 * @param channels Number of channels.
747 * @param frames Number of frames to reserve space for.
749 AudioBuffers::AudioBuffers (int channels, int frames)
750 : _channels (channels)
752 , _allocated_frames (frames)
754 _data = new float*[_channels];
755 for (int i = 0; i < _channels; ++i) {
756 _data[i] = new float[frames];
760 /** Copy constructor.
761 * @param other Other AudioBuffers; data is copied.
763 AudioBuffers::AudioBuffers (AudioBuffers const & other)
764 : _channels (other._channels)
765 , _frames (other._frames)
766 , _allocated_frames (other._frames)
768 _data = new float*[_channels];
769 for (int i = 0; i < _channels; ++i) {
770 _data[i] = new float[_frames];
771 memcpy (_data[i], other._data[i], _frames * sizeof (float));
775 /** AudioBuffers destructor */
776 AudioBuffers::~AudioBuffers ()
778 for (int i = 0; i < _channels; ++i) {
785 /** @param c Channel index.
786 * @return Buffer for this channel.
789 AudioBuffers::data (int c) const
791 assert (c >= 0 && c < _channels);
795 /** Set the number of frames that these AudioBuffers will report themselves
797 * @param f Frames; must be less than or equal to the number of allocated frames.
800 AudioBuffers::set_frames (int f)
802 assert (f <= _allocated_frames);
806 /** Make all samples on all channels silent */
808 AudioBuffers::make_silent ()
810 for (int i = 0; i < _channels; ++i) {
815 /** Make all samples on a given channel silent.
819 AudioBuffers::make_silent (int c)
821 assert (c >= 0 && c < _channels);
823 for (int i = 0; i < _frames; ++i) {
828 /** Copy data from another AudioBuffers to this one. All channels are copied.
829 * @param from AudioBuffers to copy from; must have the same number of channels as this.
830 * @param frames_to_copy Number of frames to copy.
831 * @param read_offset Offset to read from in `from'.
832 * @param write_offset Offset to write to in `to'.
835 AudioBuffers::copy_from (AudioBuffers* from, int frames_to_copy, int read_offset, int write_offset)
837 assert (from->channels() == channels());
840 assert (read_offset >= 0 && (read_offset + frames_to_copy) <= from->_allocated_frames);
841 assert (write_offset >= 0 && (write_offset + frames_to_copy) <= _allocated_frames);
843 for (int i = 0; i < _channels; ++i) {
844 memcpy (_data[i] + write_offset, from->_data[i] + read_offset, frames_to_copy * sizeof(float));
848 /** Move audio data around.
849 * @param from Offset to move from.
850 * @param to Offset to move to.
851 * @param frames Number of frames to move.
855 AudioBuffers::move (int from, int to, int frames)
862 assert (from < _frames);
864 assert (to < _frames);
866 assert (frames <= _frames);
867 assert ((from + frames) <= _frames);
868 assert ((to + frames) <= _frames);
870 for (int i = 0; i < _channels; ++i) {
871 memmove (_data[i] + to, _data[i] + from, frames * sizeof(float));
875 /** Trip an assert if the caller is not in the UI thread */
879 assert (this_thread::get_id() == ui_thread);
882 /** @param v Source video frame.
883 * @param audio_sample_rate Source audio sample rate.
884 * @param frames_per_second Number of video frames per second.
885 * @return Equivalent number of audio frames for `v'.
888 video_frames_to_audio_frames (SourceFrame v, float audio_sample_rate, float frames_per_second)
890 return ((int64_t) v * audio_sample_rate / frames_per_second);
893 /** @param f Filename.
894 * @return true if this file is a still image, false if it is something else.
897 still_image_file (string f)
899 #if BOOST_FILESYSTEM_VERSION == 3
900 string ext = boost::filesystem::path(f).extension().string();
902 string ext = boost::filesystem::path(f).extension();
905 transform (ext.begin(), ext.end(), ext.begin(), ::tolower);
907 return (ext == ".tif" || ext == ".tiff" || ext == ".jpg" || ext == ".jpeg" || ext == ".png");