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.
31 #include <sys/types.h>
32 #include <sys/socket.h>
33 #include <boost/algorithm/string.hpp>
35 #include <magick/MagickCore.h>
36 #include <magick/version.h>
37 #include <libssh/libssh.h>
38 #include <libdcp/version.h>
40 #include <libavcodec/avcodec.h>
41 #include <libavformat/avformat.h>
42 #include <libswscale/swscale.h>
43 #include <libavfilter/avfiltergraph.h>
44 #include <libpostproc/postprocess.h>
45 #include <libavutil/pixfmt.h>
48 #include "exceptions.h"
51 #include "dcp_content_type.h"
54 #include "film_state.h"
55 #include "player_manager.h"
62 using namespace boost;
64 /** Convert some number of seconds to a string representation
65 * in hours, minutes and seconds.
68 * @return String of the form H:M:S (where H is hours, M
69 * is minutes and S is seconds).
72 seconds_to_hms (int s)
82 hms << setfill ('0') << m << ":";
84 hms << setfill ('0') << s;
89 /** @param s Number of seconds.
90 * @return String containing an approximate description of s (e.g. "about 2 hours")
93 seconds_to_approximate_hms (int s)
104 ap << (h + 1) << " hours";
116 ap << m << " minutes";
119 ap << s << " seconds";
125 /** @param l Mangled C++ identifier.
126 * @return Demangled version.
131 string::size_type const b = l.find_first_of ("(");
132 if (b == string::npos) {
136 string::size_type const p = l.find_last_of ("+");
137 if (p == string::npos) {
145 string const fn = l.substr (b + 1, p - b - 1);
150 char* realname = abi::__cxa_demangle (fn.c_str(), 0, 0, &status);
155 } catch (std::exception) {
162 /** Write a stacktrace to an ostream.
163 * @param out Stream to write to.
164 * @param levels Number of levels to go up the call stack.
167 stacktrace (ostream& out, int levels)
174 size = backtrace (array, 200);
175 strings = backtrace_symbols (array, size);
178 for (i = 0; i < size && (levels == 0 || i < size_t(levels)); i++) {
179 out << " " << demangle (strings[i]) << endl;
186 /** @param s Sample format.
187 * @return String representation.
190 audio_sample_format_to_string (AVSampleFormat s)
192 /* Our sample format handling is not exactly complete */
195 case AV_SAMPLE_FMT_S16:
204 /** @param s String representation of a sample format, as returned from audio_sample_format_to_string().
205 * @return Sample format.
208 audio_sample_format_from_string (string s)
211 return AV_SAMPLE_FMT_S16;
214 return AV_SAMPLE_FMT_NONE;
217 /** @return Version of vobcopy that is on the path (and hence that we will use) */
221 FILE* f = popen ("vobcopy -V 2>&1", "r");
223 throw EncodeError ("could not run vobcopy to check version");
226 string version = "unknown";
231 ssize_t const r = getline (&buf, &n, f);
235 split (b, s, is_any_of (" "));
236 if (b.size() >= 2 && b[0] == "Vobcopy") {
248 /** @param v Version as used by FFmpeg.
249 * @return A string representation of v.
252 ffmpeg_version_to_string (int v)
255 s << ((v & 0xff0000) >> 16) << "." << ((v & 0xff00) >> 8) << "." << (v & 0xff);
259 /** Return a user-readable string summarising the versions of our dependencies */
261 dependency_version_summary ()
264 s << "libopenjpeg " << opj_version () << ", "
265 << "vobcopy " << vobcopy_version() << ", "
266 << "libavcodec " << ffmpeg_version_to_string (avcodec_version()) << ", "
267 << "libavfilter " << ffmpeg_version_to_string (avfilter_version()) << ", "
268 << "libavformat " << ffmpeg_version_to_string (avformat_version()) << ", "
269 << "libavutil " << ffmpeg_version_to_string (avutil_version()) << ", "
270 << "libpostproc " << ffmpeg_version_to_string (postproc_version()) << ", "
271 << "libswscale " << ffmpeg_version_to_string (swscale_version()) << ", "
272 << MagickVersion << ", "
273 << "libssh " << ssh_version (0) << ", "
274 << "libdcp " << libdcp::version << " git " << libdcp::git_commit;
279 /** Write some data to a socket.
280 * @param fd Socket file descriptor.
282 * @param size Amount to write, in bytes.
285 socket_write (int fd, uint8_t const * data, int size)
287 uint8_t const * p = data;
289 int const n = send (fd, p, size, MSG_NOSIGNAL);
292 s << "could not write (" << strerror (errno) << ")";
293 throw NetworkError (s.str ());
302 seconds (struct timeval t)
304 return t.tv_sec + (double (t.tv_usec) / 1e6);
307 /** @param fd File descriptor to read from */
308 SocketReader::SocketReader (int fd)
315 /** Mark some data as being `consumed', so that it will not be returned
317 * @param size Amount of data to consume, in bytes.
320 SocketReader::consume (int size)
322 assert (_buffer_data >= size);
324 _buffer_data -= size;
325 if (_buffer_data > 0) {
326 /* Shift still-valid data to the start of the buffer */
327 memmove (_buffer, _buffer + size, _buffer_data);
331 /** Read a definite amount of data from our socket, and mark
333 * @param data Where to put the data.
334 * @param size Number of bytes to read.
337 SocketReader::read_definite_and_consume (uint8_t* data, int size)
339 int const from_buffer = min (_buffer_data, size);
340 if (from_buffer > 0) {
341 /* Get data from our buffer */
342 memcpy (data, _buffer, from_buffer);
343 consume (from_buffer);
344 /* Update our output state */
349 /* read() the rest */
351 int const n = ::read (_fd, data, size);
353 throw NetworkError ("could not read");
361 /** Read as much data as is available, up to some limit.
362 * @param data Where to put the data.
363 * @param size Maximum amount of data to read.
366 SocketReader::read_indefinite (uint8_t* data, int size)
368 assert (size < int (sizeof (_buffer)));
370 /* Amount of extra data we need to read () */
371 int to_read = size - _buffer_data;
372 while (to_read > 0) {
373 /* read as much of it as we can (into our buffer) */
374 int const n = ::read (_fd, _buffer + _buffer_data, to_read);
376 throw NetworkError ("could not read");
383 assert (_buffer_data >= size);
385 /* copy data into the output buffer */
386 assert (size >= _buffer_data);
387 memcpy (data, _buffer, size);
391 sigchld_handler (int, siginfo_t* info, void *)
393 PlayerManager::instance()->child_exited (info->si_pid);
396 /** Call the required functions to set up DVD-o-matic's static arrays, etc. */
400 Format::setup_formats ();
401 DCPContentType::setup_dcp_content_types ();
402 Scaler::setup_scalers ();
403 Filter::setup_filters ();
406 sa.sa_flags = SA_SIGINFO;
407 sigemptyset (&sa.sa_mask);
408 sa.sa_sigaction = sigchld_handler;
409 sigaction (SIGCHLD, &sa, 0);
413 crop_string (Position start, Size size)
416 s << "crop=" << size.width << ":" << size.height << ":" << start.x << ":" << start.y;
421 split_at_spaces_considering_quotes (string s)
424 bool in_quotes = false;
426 for (string::size_type i = 0; i < s.length(); ++i) {
427 if (s[i] == ' ' && !in_quotes) {
430 } else if (s[i] == '"') {
431 in_quotes = !in_quotes;
443 md5_data (string title, void const * data, int size)
445 MHASH ht = mhash_init (MHASH_MD5);
446 if (ht == MHASH_FAILED) {
447 throw EncodeError ("could not create hash thread");
450 mhash (ht, data, size);
453 mhash_deinit (ht, hash);
455 printf ("%s [%d]: ", title.c_str (), size);
456 for (int i = 0; i < int (mhash_get_block_size (MHASH_MD5)); ++i) {
457 printf ("%.2x", hash[i]);