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
32 #include <sys/types.h>
33 #include <sys/socket.h>
35 #include <libssh/libssh.h>
37 #include <boost/algorithm/string.hpp>
39 #include <openssl/md5.h>
40 #include <magick/MagickCore.h>
41 #include <magick/version.h>
42 #include <libdcp/version.h>
44 #include <libavcodec/avcodec.h>
45 #include <libavformat/avformat.h>
46 #include <libswscale/swscale.h>
47 #include <libavfilter/avfiltergraph.h>
48 #include <libpostproc/postprocess.h>
49 #include <libavutil/pixfmt.h>
52 #include "exceptions.h"
55 #include "dcp_content_type.h"
58 #include "film_state.h"
59 #ifndef DVDOMATIC_DISABLE_PLAYER
60 #include "player_manager.h"
68 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 /** @param s Sample format.
195 * @return String representation.
198 audio_sample_format_to_string (AVSampleFormat s)
200 /* Our sample format handling is not exactly complete */
203 case AV_SAMPLE_FMT_S16:
212 /** @param s String representation of a sample format, as returned from audio_sample_format_to_string().
213 * @return Sample format.
216 audio_sample_format_from_string (string s)
219 return AV_SAMPLE_FMT_S16;
222 return AV_SAMPLE_FMT_NONE;
225 /** @return Version of vobcopy that is on the path (and hence that we will use) */
229 FILE* f = popen ("vobcopy -V 2>&1", "r");
231 throw EncodeError ("could not run vobcopy to check version");
234 string version = "unknown";
238 if (fgets (buf, sizeof (buf), f)) {
241 split (b, s, is_any_of (" "));
242 if (b.size() >= 2 && b[0] == "Vobcopy") {
253 /** @param v Version as used by FFmpeg.
254 * @return A string representation of v.
257 ffmpeg_version_to_string (int v)
260 s << ((v & 0xff0000) >> 16) << "." << ((v & 0xff00) >> 8) << "." << (v & 0xff);
264 /** Return a user-readable string summarising the versions of our dependencies */
266 dependency_version_summary ()
269 s << "libopenjpeg " << opj_version () << ", "
270 << "vobcopy " << vobcopy_version() << ", "
271 << "libavcodec " << ffmpeg_version_to_string (avcodec_version()) << ", "
272 << "libavfilter " << ffmpeg_version_to_string (avfilter_version()) << ", "
273 << "libavformat " << ffmpeg_version_to_string (avformat_version()) << ", "
274 << "libavutil " << ffmpeg_version_to_string (avutil_version()) << ", "
275 << "libpostproc " << ffmpeg_version_to_string (postproc_version()) << ", "
276 << "libswscale " << ffmpeg_version_to_string (swscale_version()) << ", "
277 << MagickVersion << ", "
278 << "libssh " << ssh_version (0) << ", "
279 << "libdcp " << libdcp::version << " git " << libdcp::git_commit;
284 #ifdef DVDOMATIC_POSIX
285 /** Write some data to a socket.
286 * @param fd Socket file descriptor.
288 * @param size Amount to write, in bytes.
291 socket_write (int fd, uint8_t const * data, int size)
293 uint8_t const * p = data;
295 int const n = send (fd, p, size, MSG_NOSIGNAL);
298 s << "could not write (" << strerror (errno) << ")";
299 throw NetworkError (s.str ());
309 seconds (struct timeval t)
311 return t.tv_sec + (double (t.tv_usec) / 1e6);
314 #ifdef DVDOMATIC_POSIX
315 /** @param fd File descriptor to read from */
316 SocketReader::SocketReader (int fd)
323 /** Mark some data as being `consumed', so that it will not be returned
325 * @param size Amount of data to consume, in bytes.
328 SocketReader::consume (int size)
330 assert (_buffer_data >= size);
332 _buffer_data -= size;
333 if (_buffer_data > 0) {
334 /* Shift still-valid data to the start of the buffer */
335 memmove (_buffer, _buffer + size, _buffer_data);
339 /** Read a definite amount of data from our socket, and mark
341 * @param data Where to put the data.
342 * @param size Number of bytes to read.
345 SocketReader::read_definite_and_consume (uint8_t* data, int size)
347 int const from_buffer = min (_buffer_data, size);
348 if (from_buffer > 0) {
349 /* Get data from our buffer */
350 memcpy (data, _buffer, from_buffer);
351 consume (from_buffer);
352 /* Update our output state */
357 /* read() the rest */
359 int const n = ::read (_fd, data, size);
361 throw NetworkError ("could not read");
369 /** Read as much data as is available, up to some limit.
370 * @param data Where to put the data.
371 * @param size Maximum amount of data to read.
374 SocketReader::read_indefinite (uint8_t* data, int size)
376 assert (size < int (sizeof (_buffer)));
378 /* Amount of extra data we need to read () */
379 int to_read = size - _buffer_data;
380 while (to_read > 0) {
381 /* read as much of it as we can (into our buffer) */
382 int const n = ::read (_fd, _buffer + _buffer_data, to_read);
384 throw NetworkError ("could not read");
391 assert (_buffer_data >= size);
393 /* copy data into the output buffer */
394 assert (size >= _buffer_data);
395 memcpy (data, _buffer, size);
399 #ifdef DVDOMATIC_POSIX
401 sigchld_handler (int, siginfo_t* info, void *)
403 #ifndef DVDOMATIC_DISABLE_PLAYER
404 PlayerManager::instance()->child_exited (info->si_pid);
409 /** Call the required functions to set up DVD-o-matic's static arrays, etc. */
413 Format::setup_formats ();
414 DCPContentType::setup_dcp_content_types ();
415 Scaler::setup_scalers ();
416 Filter::setup_filters ();
418 #ifdef DVDOMATIC_POSIX
420 sa.sa_flags = SA_SIGINFO;
421 sigemptyset (&sa.sa_mask);
422 sa.sa_sigaction = sigchld_handler;
423 sigaction (SIGCHLD, &sa, 0);
428 crop_string (Position start, Size size)
431 s << "crop=" << size.width << ":" << size.height << ":" << start.x << ":" << start.y;
436 split_at_spaces_considering_quotes (string s)
439 bool in_quotes = false;
441 for (string::size_type i = 0; i < s.length(); ++i) {
442 if (s[i] == ' ' && !in_quotes) {
445 } else if (s[i] == '"') {
446 in_quotes = !in_quotes;
458 md5_data (string title, void const * data, int size)
460 MHASH ht = mhash_init (MHASH_MD5);
461 if (ht == MHASH_FAILED) {
462 throw EncodeError ("could not create hash thread");
465 mhash (ht, data, size);
468 mhash_deinit (ht, hash);
470 printf ("%s [%d]: ", title.c_str (), size);
471 for (int i = 0; i < int (mhash_get_block_size (MHASH_MD5)); ++i) {
472 printf ("%.2x", hash[i]);
479 md5_digest (string file)
481 ifstream f (file.c_str(), ios::binary);
483 throw OpenFileError (file);
486 f.seekg (0, ios::end);
487 int bytes = f.tellg ();
488 f.seekg (0, ios::beg);
490 int const buffer_size = 64 * 1024;
491 char buffer[buffer_size];
494 MD5_Init (&md5_context);
496 int const t = min (bytes, buffer_size);
498 MD5_Update (&md5_context, buffer, t);
502 unsigned char digest[MD5_DIGEST_LENGTH];
503 MD5_Final (digest, &md5_context);
506 for (int i = 0; i < MD5_DIGEST_LENGTH; ++i) {
507 s << hex << setfill('0') << setw(2) << ((int) digest[i]);
514 dcp_audio_sample_rate (int fs)