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.
28 #ifdef DVDOMATIC_POSIX
31 #include <sys/types.h>
32 #include <sys/socket.h>
34 #include <libssh/libssh.h>
36 #include <boost/algorithm/string.hpp>
38 #include <magick/MagickCore.h>
39 #include <magick/version.h>
40 #include <libdcp/version.h>
42 #include <libavcodec/avcodec.h>
43 #include <libavformat/avformat.h>
44 #include <libswscale/swscale.h>
45 #include <libavfilter/avfiltergraph.h>
46 #include <libpostproc/postprocess.h>
47 #include <libavutil/pixfmt.h>
50 #include "exceptions.h"
53 #include "dcp_content_type.h"
56 #include "film_state.h"
57 #include "player_manager.h"
64 using namespace boost;
66 /** Convert some number of seconds to a string representation
67 * in hours, minutes and seconds.
70 * @return String of the form H:M:S (where H is hours, M
71 * is minutes and S is seconds).
74 seconds_to_hms (int s)
84 hms << setfill ('0') << m << ":";
86 hms << setfill ('0') << s;
91 /** @param s Number of seconds.
92 * @return String containing an approximate description of s (e.g. "about 2 hours")
95 seconds_to_approximate_hms (int s)
106 ap << (h + 1) << " hours";
118 ap << m << " minutes";
121 ap << s << " seconds";
127 #ifdef DVDOMATIC_POSIX
128 /** @param l Mangled C++ identifier.
129 * @return Demangled version.
134 string::size_type const b = l.find_first_of ("(");
135 if (b == string::npos) {
139 string::size_type const p = l.find_last_of ("+");
140 if (p == string::npos) {
148 string const fn = l.substr (b + 1, p - b - 1);
153 char* realname = abi::__cxa_demangle (fn.c_str(), 0, 0, &status);
158 } catch (std::exception) {
165 /** Write a stacktrace to an ostream.
166 * @param out Stream to write to.
167 * @param levels Number of levels to go up the call stack.
170 stacktrace (ostream& out, int levels)
177 size = backtrace (array, 200);
178 strings = backtrace_symbols (array, size);
181 for (i = 0; i < size && (levels == 0 || i < size_t(levels)); i++) {
182 out << " " << demangle (strings[i]) << endl;
190 /** @param s Sample format.
191 * @return String representation.
194 audio_sample_format_to_string (AVSampleFormat s)
196 /* Our sample format handling is not exactly complete */
199 case AV_SAMPLE_FMT_S16:
208 /** @param s String representation of a sample format, as returned from audio_sample_format_to_string().
209 * @return Sample format.
212 audio_sample_format_from_string (string s)
215 return AV_SAMPLE_FMT_S16;
218 return AV_SAMPLE_FMT_NONE;
221 /** @return Version of vobcopy that is on the path (and hence that we will use) */
225 FILE* f = popen ("vobcopy -V 2>&1", "r");
227 throw EncodeError ("could not run vobcopy to check version");
230 string version = "unknown";
234 if (fgets (buf, sizeof (buf), f)) {
237 split (b, s, is_any_of (" "));
238 if (b.size() >= 2 && b[0] == "Vobcopy") {
249 /** @param v Version as used by FFmpeg.
250 * @return A string representation of v.
253 ffmpeg_version_to_string (int v)
256 s << ((v & 0xff0000) >> 16) << "." << ((v & 0xff00) >> 8) << "." << (v & 0xff);
260 /** Return a user-readable string summarising the versions of our dependencies */
262 dependency_version_summary ()
265 s << "libopenjpeg " << opj_version () << ", "
266 << "vobcopy " << vobcopy_version() << ", "
267 << "libavcodec " << ffmpeg_version_to_string (avcodec_version()) << ", "
268 << "libavfilter " << ffmpeg_version_to_string (avfilter_version()) << ", "
269 << "libavformat " << ffmpeg_version_to_string (avformat_version()) << ", "
270 << "libavutil " << ffmpeg_version_to_string (avutil_version()) << ", "
271 << "libpostproc " << ffmpeg_version_to_string (postproc_version()) << ", "
272 << "libswscale " << ffmpeg_version_to_string (swscale_version()) << ", "
273 << MagickVersion << ", "
274 << "libssh " << ssh_version (0) << ", "
275 << "libdcp " << libdcp::version << " git " << libdcp::git_commit;
280 #ifdef DVDOMATIC_POSIX
281 /** Write some data to a socket.
282 * @param fd Socket file descriptor.
284 * @param size Amount to write, in bytes.
287 socket_write (int fd, uint8_t const * data, int size)
289 uint8_t const * p = data;
291 int const n = send (fd, p, size, MSG_NOSIGNAL);
294 s << "could not write (" << strerror (errno) << ")";
295 throw NetworkError (s.str ());
305 seconds (struct timeval t)
307 return t.tv_sec + (double (t.tv_usec) / 1e6);
310 #ifdef DVDOMATIC_POSIX
311 /** @param fd File descriptor to read from */
312 SocketReader::SocketReader (int fd)
319 /** Mark some data as being `consumed', so that it will not be returned
321 * @param size Amount of data to consume, in bytes.
324 SocketReader::consume (int size)
326 assert (_buffer_data >= size);
328 _buffer_data -= size;
329 if (_buffer_data > 0) {
330 /* Shift still-valid data to the start of the buffer */
331 memmove (_buffer, _buffer + size, _buffer_data);
335 /** Read a definite amount of data from our socket, and mark
337 * @param data Where to put the data.
338 * @param size Number of bytes to read.
341 SocketReader::read_definite_and_consume (uint8_t* data, int size)
343 int const from_buffer = min (_buffer_data, size);
344 if (from_buffer > 0) {
345 /* Get data from our buffer */
346 memcpy (data, _buffer, from_buffer);
347 consume (from_buffer);
348 /* Update our output state */
353 /* read() the rest */
355 int const n = ::read (_fd, data, size);
357 throw NetworkError ("could not read");
365 /** Read as much data as is available, up to some limit.
366 * @param data Where to put the data.
367 * @param size Maximum amount of data to read.
370 SocketReader::read_indefinite (uint8_t* data, int size)
372 assert (size < int (sizeof (_buffer)));
374 /* Amount of extra data we need to read () */
375 int to_read = size - _buffer_data;
376 while (to_read > 0) {
377 /* read as much of it as we can (into our buffer) */
378 int const n = ::read (_fd, _buffer + _buffer_data, to_read);
380 throw NetworkError ("could not read");
387 assert (_buffer_data >= size);
389 /* copy data into the output buffer */
390 assert (size >= _buffer_data);
391 memcpy (data, _buffer, size);
395 #ifdef DVDOMATIC_POSIX
397 sigchld_handler (int, siginfo_t* info, void *)
399 PlayerManager::instance()->child_exited (info->si_pid);
403 /** Call the required functions to set up DVD-o-matic's static arrays, etc. */
407 Format::setup_formats ();
408 DCPContentType::setup_dcp_content_types ();
409 Scaler::setup_scalers ();
410 Filter::setup_filters ();
412 #ifdef DVDOMATIC_POSIX
414 sa.sa_flags = SA_SIGINFO;
415 sigemptyset (&sa.sa_mask);
416 sa.sa_sigaction = sigchld_handler;
417 sigaction (SIGCHLD, &sa, 0);
422 crop_string (Position start, Size size)
425 s << "crop=" << size.width << ":" << size.height << ":" << start.x << ":" << start.y;
430 split_at_spaces_considering_quotes (string s)
433 bool in_quotes = false;
435 for (string::size_type i = 0; i < s.length(); ++i) {
436 if (s[i] == ' ' && !in_quotes) {
439 } else if (s[i] == '"') {
440 in_quotes = !in_quotes;
452 md5_data (string title, void const * data, int size)
454 MHASH ht = mhash_init (MHASH_MD5);
455 if (ht == MHASH_FAILED) {
456 throw EncodeError ("could not create hash thread");
459 mhash (ht, data, size);
462 mhash_deinit (ht, hash);
464 printf ("%s [%d]: ", title.c_str (), size);
465 for (int i = 0; i < int (mhash_get_block_size (MHASH_MD5)); ++i) {
466 printf ("%.2x", hash[i]);