/*
- Copyright (C) 2012 Carl Hetherington <cth@carlh.net>
+ Copyright (C) 2012-2014 Carl Hetherington <cth@carlh.net>
Copyright (C) 2000-2007 Paul Davis
This program is free software; you can redistribute it and/or modify
* @brief Some utility functions and classes.
*/
-#include <sstream>
#include <iomanip>
#include <iostream>
#include <fstream>
#include <climits>
+#include <stdexcept>
#ifdef DCPOMATIC_POSIX
#include <execinfo.h>
#include <cxxabi.h>
#include <boost/algorithm/string.hpp>
#include <boost/bind.hpp>
#include <boost/lambda/lambda.hpp>
-#include <boost/lexical_cast.hpp>
#include <boost/thread.hpp>
#include <boost/filesystem.hpp>
+#ifdef DCPOMATIC_WINDOWS
+#include <boost/locale.hpp>
+#endif
#include <glib.h>
#include <openjpeg.h>
-#include <openssl/md5.h>
+#include <pangomm/init.h>
+#ifdef DCPOMATIC_IMAGE_MAGICK
#include <magick/MagickCore.h>
+#else
+#include <magick/common.h>
+#include <magick/magick_config.h>
+#endif
#include <magick/version.h>
-#include <libdcp/version.h>
+#include <dcp/version.h>
+#include <dcp/util.h>
+#include <dcp/signer.h>
+#include <dcp/raw_convert.h>
extern "C" {
#include <libavcodec/avcodec.h>
#include <libavformat/avformat.h>
#include <libswscale/swscale.h>
#include <libavfilter/avfiltergraph.h>
-#include <libpostproc/postprocess.h>
#include <libavutil/pixfmt.h>
}
#include "util.h"
#include "scaler.h"
#include "dcp_content_type.h"
#include "filter.h"
-#include "sound_processor.h"
+#include "cinema_sound_processor.h"
#include "config.h"
#include "ratio.h"
+#include "job.h"
+#include "cross.h"
+#include "video_content.h"
+#include "rect.h"
+#include "md5_digester.h"
+#include "audio_processor.h"
+#include "safe_stringstream.h"
#ifdef DCPOMATIC_WINDOWS
#include "stack.hpp"
#endif
#include "i18n.h"
using std::string;
-using std::stringstream;
using std::setfill;
using std::ostream;
using std::endl;
using std::vector;
using std::hex;
using std::setw;
-using std::ifstream;
using std::ios;
using std::min;
using std::max;
using std::list;
using std::multimap;
+using std::map;
using std::istream;
using std::numeric_limits;
using std::pair;
-using std::ofstream;
+using std::cout;
+using std::bad_alloc;
+using std::streampos;
+using std::set_terminate;
using boost::shared_ptr;
using boost::thread;
-using boost::lexical_cast;
using boost::optional;
-using libdcp::Size;
+using dcp::Size;
+using dcp::raw_convert;
static boost::thread::id ui_thread;
static boost::filesystem::path backtrace_file;
int h = m / 60;
m -= (h * 60);
- stringstream hms;
+ SafeStringStream hms;
hms << h << N_(":");
hms.width (2);
hms << std::setfill ('0') << m << N_(":");
int h = m / 60;
m -= (h * 60);
- stringstream ap;
-
- if (h > 0) {
- if (m > 30) {
- ap << (h + 1) << N_(" ") << _("hours");
+ SafeStringStream ap;
+
+ bool const hours = h > 0;
+ bool const minutes = h < 10 && m > 0;
+ bool const seconds = m < 10 && s > 0;
+
+ if (hours) {
+ if (m > 30 && !minutes) {
+ /* TRANSLATORS: h here is an abbreviation for hours */
+ ap << (h + 1) << _("h");
} else {
- if (h == 1) {
- ap << N_("1 ") << _("hour");
- } else {
- ap << h << N_(" ") << _("hours");
- }
+ /* TRANSLATORS: h here is an abbreviation for hours */
+ ap << h << _("h");
+ }
+
+ if (minutes | seconds) {
+ ap << N_(" ");
}
- } else if (m > 0) {
- if (m == 1) {
- ap << N_("1 ") << _("minute");
+ }
+
+ if (minutes) {
+ /* Minutes */
+ if (s > 30 && !seconds) {
+ /* TRANSLATORS: m here is an abbreviation for minutes */
+ ap << (m + 1) << _("m");
} else {
- ap << m << N_(" ") << _("minutes");
+ /* TRANSLATORS: m here is an abbreviation for minutes */
+ ap << m << _("m");
+ }
+
+ if (seconds) {
+ ap << N_(" ");
}
- } else {
- ap << s << N_(" ") << _("seconds");
+ }
+
+ if (seconds) {
+ /* Seconds */
+ /* TRANSLATORS: s here is an abbreviation for seconds */
+ ap << s << _("s");
}
return ap.str ();
static string
ffmpeg_version_to_string (int v)
{
- stringstream s;
+ SafeStringStream s;
s << ((v & 0xff0000) >> 16) << N_(".") << ((v & 0xff00) >> 8) << N_(".") << (v & 0xff);
return s.str ();
}
-/** Return a user-readable string summarising the versions of our dependencies */
-string
-dependency_version_summary ()
-{
- stringstream s;
- s << N_("libopenjpeg ") << opj_version () << N_(", ")
- << N_("libavcodec ") << ffmpeg_version_to_string (avcodec_version()) << N_(", ")
- << N_("libavfilter ") << ffmpeg_version_to_string (avfilter_version()) << N_(", ")
- << N_("libavformat ") << ffmpeg_version_to_string (avformat_version()) << N_(", ")
- << N_("libavutil ") << ffmpeg_version_to_string (avutil_version()) << N_(", ")
- << N_("libpostproc ") << ffmpeg_version_to_string (postproc_version()) << N_(", ")
- << N_("libswscale ") << ffmpeg_version_to_string (swscale_version()) << N_(", ")
- << MagickVersion << N_(", ")
- << N_("libssh ") << ssh_version (0) << N_(", ")
- << N_("libdcp ") << libdcp::version << N_(" git ") << libdcp::git_commit;
-
- return s.str ();
-}
-
double
seconds (struct timeval t)
{
LONG WINAPI exception_handler(struct _EXCEPTION_POINTERS *)
{
dbg::stack s;
- ofstream f (backtrace_file.string().c_str());
- std::copy(s.begin(), s.end(), std::ostream_iterator<dbg::stack_frame>(f, "\n"));
+ FILE* f = fopen_boost (backtrace_file, "w");
+ fprintf (f, "Exception thrown:");
+ for (dbg::stack::const_iterator i = s.begin(); i != s.end(); ++i) {
+ fprintf (f, "%p %s %d %s\n", i->instruction, i->function.c_str(), i->line, i->module.c_str());
+ }
+ fclose (f);
return EXCEPTION_CONTINUE_SEARCH;
}
#endif
+/* From http://stackoverflow.com/questions/2443135/how-do-i-find-where-an-exception-was-thrown-in-c */
+void
+terminate ()
+{
+ static bool tried_throw = false;
+
+ try {
+ // try once to re-throw currently active exception
+ if (!tried_throw) {
+ tried_throw = true;
+ throw;
+ }
+ }
+ catch (const std::exception &e) {
+ std::cerr << __FUNCTION__ << " caught unhandled exception. what(): "
+ << e.what() << std::endl;
+ }
+ catch (...) {
+ std::cerr << __FUNCTION__ << " caught unknown/unhandled exception."
+ << std::endl;
+ }
+
+#ifdef DCPOMATIC_POSIX
+ stacktrace (cout, 50);
+#endif
+ abort();
+}
+
/** Call the required functions to set up DCP-o-matic's static arrays, etc.
* Must be called from the UI thread, if there is one.
*/
backtrace_file /= g_get_user_config_dir ();
backtrace_file /= "backtrace.txt";
SetUnhandledExceptionFilter(exception_handler);
+
+ /* Dark voodoo which, I think, gets boost::filesystem::path to
+ correctly convert UTF-8 strings to paths, and also paths
+ back to UTF-8 strings (on path::string()).
+
+ After this, constructing boost::filesystem::paths from strings
+ converts from UTF-8 to UTF-16 inside the path. Then
+ path::string().c_str() gives UTF-8 and
+ path::c_str() gives UTF-16.
+
+ This is all Windows-only. AFAICT Linux/OS X use UTF-8 everywhere,
+ so things are much simpler.
+ */
+ std::locale::global (boost::locale::generator().generate (""));
+ boost::filesystem::path::imbue (std::locale ());
#endif
avfilter_register_all ();
+
+#ifdef DCPOMATIC_OSX
+ /* Add our lib directory to the libltdl search path so that
+ xmlsec can find xmlsec1-openssl.
+ */
+ boost::filesystem::path lib = app_contents ();
+ lib /= "lib";
+ setenv ("LTDL_LIBRARY_PATH", lib.c_str (), 1);
+#endif
+
+ set_terminate (terminate);
+
+ Pango::init ();
+ dcp::init ();
Ratio::setup_ratios ();
+ VideoContentScale::setup_scales ();
DCPContentType::setup_dcp_content_types ();
Scaler::setup_scalers ();
Filter::setup_filters ();
- SoundProcessor::setup_sound_processors ();
+ CinemaSoundProcessor::setup_cinema_sound_processors ();
+ AudioProcessor::setup_audio_processors ();
ui_thread = boost::this_thread::get_id ();
}
}
#endif
+#ifdef DCPOMATIC_OSX
+boost::filesystem::path
+mo_path ()
+{
+ return "DCP-o-matic 2.app/Contents/Resources";
+}
+#endif
+
void
dcpomatic_setup_gettext_i18n (string lang)
{
-#ifdef DCPOMATIC_POSIX
+#ifdef DCPOMATIC_LINUX
lang += ".UTF8";
#endif
if (!lang.empty ()) {
- /* Override our environment language; this is essential on
- Windows.
+ /* Override our environment language. Note that the caller must not
+ free the string passed into putenv().
*/
- char cmd[64];
- snprintf (cmd, sizeof(cmd), "LANGUAGE=%s", lang.c_str ());
- putenv (cmd);
- snprintf (cmd, sizeof(cmd), "LANG=%s", lang.c_str ());
- putenv (cmd);
+ string s = String::compose ("LANGUAGE=%1", lang);
+ putenv (strdup (s.c_str ()));
+ s = String::compose ("LANG=%1", lang);
+ putenv (strdup (s.c_str ()));
+ s = String::compose ("LC_ALL=%1", lang);
+ putenv (strdup (s.c_str ()));
}
setlocale (LC_ALL, "");
textdomain ("libdcpomatic");
-#ifdef DCPOMATIC_WINDOWS
+#if defined(DCPOMATIC_WINDOWS) || defined(DCPOMATIC_OSX)
bindtextdomain ("libdcpomatic", mo_path().string().c_str());
bind_textdomain_codeset ("libdcpomatic", "UTF8");
#endif
-#ifdef DCPOMATIC_POSIX
+#ifdef DCPOMATIC_LINUX
bindtextdomain ("libdcpomatic", POSIX_LOCALE_PREFIX);
#endif
}
return out;
}
+/** @param job Optional job for which to report progress */
string
-md5_digest (void const * data, int size)
+md5_digest (vector<boost::filesystem::path> files, shared_ptr<Job> job)
{
- MD5_CTX md5_context;
- MD5_Init (&md5_context);
- MD5_Update (&md5_context, data, size);
- unsigned char digest[MD5_DIGEST_LENGTH];
- MD5_Final (digest, &md5_context);
-
- stringstream s;
- for (int i = 0; i < MD5_DIGEST_LENGTH; ++i) {
- s << std::hex << std::setfill('0') << std::setw(2) << ((int) digest[i]);
- }
+ boost::uintmax_t const buffer_size = 64 * 1024;
+ char buffer[buffer_size];
- return s.str ();
-}
+ MD5Digester digester;
-/** @param file File name.
- * @return MD5 digest of file's contents.
- */
-string
-md5_digest (boost::filesystem::path file)
-{
- ifstream f (file.string().c_str(), std::ios::binary);
- if (!f.good ()) {
- throw OpenFileError (file.string());
+ vector<int64_t> sizes;
+ for (size_t i = 0; i < files.size(); ++i) {
+ sizes.push_back (boost::filesystem::file_size (files[i]));
}
-
- f.seekg (0, std::ios::end);
- int bytes = f.tellg ();
- f.seekg (0, std::ios::beg);
-
- int const buffer_size = 64 * 1024;
- char buffer[buffer_size];
- MD5_CTX md5_context;
- MD5_Init (&md5_context);
- while (bytes > 0) {
- int const t = min (bytes, buffer_size);
- f.read (buffer, t);
- MD5_Update (&md5_context, buffer, t);
- bytes -= t;
- }
+ for (size_t i = 0; i < files.size(); ++i) {
+ FILE* f = fopen_boost (files[i], "rb");
+ if (!f) {
+ throw OpenFileError (files[i].string());
+ }
- unsigned char digest[MD5_DIGEST_LENGTH];
- MD5_Final (digest, &md5_context);
+ boost::uintmax_t const bytes = boost::filesystem::file_size (files[i]);
+ boost::uintmax_t remaining = bytes;
- stringstream s;
- for (int i = 0; i < MD5_DIGEST_LENGTH; ++i) {
- s << std::hex << std::setfill('0') << std::setw(2) << ((int) digest[i]);
- }
+ while (remaining > 0) {
+ int const t = min (remaining, buffer_size);
+ int const r = fread (buffer, 1, t, f);
+ if (r != t) {
+ throw ReadFileError (files[i], errno);
+ }
+ digester.add (buffer, t);
+ remaining -= t;
- return s.str ();
-}
+ if (job) {
+ job->set_progress ((float (i) + 1 - float(remaining) / bytes) / files.size ());
+ }
+ }
-static bool
-about_equal (float a, float b)
-{
- /* A film of F seconds at f FPS will be Ff frames;
- Consider some delta FPS d, so if we run the same
- film at (f + d) FPS it will last F(f + d) seconds.
-
- Hence the difference in length over the length of the film will
- be F(f + d) - Ff frames
- = Ff + Fd - Ff frames
- = Fd frames
- = Fd/f seconds
-
- So if we accept a difference of 1 frame, ie 1/f seconds, we can
- say that
-
- 1/f = Fd/f
- ie 1 = Fd
- ie d = 1/F
-
- So for a 3hr film, ie F = 3 * 60 * 60 = 10800, the acceptable
- FPS error is 1/F ~= 0.0001 ~= 10-e4
- */
+ fclose (f);
+ }
- return (fabs (a - b) < 1e-4);
+ return digester.get ();
}
/** @param An arbitrary audio frame rate.
Socket::Socket (int timeout)
: _deadline (_io_service)
, _socket (_io_service)
+ , _acceptor (0)
, _timeout (timeout)
{
_deadline.expires_at (boost::posix_time::pos_infin);
check ();
}
+Socket::~Socket ()
+{
+ delete _acceptor;
+}
+
void
Socket::check ()
{
if (_deadline.expires_at() <= boost::asio::deadline_timer::traits_type::now ()) {
- _socket.close ();
+ if (_acceptor) {
+ _acceptor->cancel ();
+ } else {
+ _socket.close ();
+ }
_deadline.expires_at (boost::posix_time::pos_infin);
}
* @param endpoint End-point to connect to.
*/
void
-Socket::connect (boost::asio::ip::basic_resolver_entry<boost::asio::ip::tcp> const & endpoint)
+Socket::connect (boost::asio::ip::tcp::endpoint endpoint)
{
_deadline.expires_from_now (boost::posix_time::seconds (_timeout));
boost::system::error_code ec = boost::asio::error::would_block;
_io_service.run_one();
} while (ec == boost::asio::error::would_block);
- if (ec || !_socket.is_open ()) {
+ if (ec) {
+ throw NetworkError (String::compose (_("error during async_connect (%1)"), ec.value ()));
+ }
+
+ if (!_socket.is_open ()) {
throw NetworkError (_("connect timed out"));
}
}
+void
+Socket::accept (int port)
+{
+ _acceptor = new boost::asio::ip::tcp::acceptor (_io_service, boost::asio::ip::tcp::endpoint (boost::asio::ip::tcp::v4(), port));
+
+ _deadline.expires_from_now (boost::posix_time::seconds (_timeout));
+ boost::system::error_code ec = boost::asio::error::would_block;
+ _acceptor->async_accept (_socket, boost::lambda::var(ec) = boost::lambda::_1);
+ do {
+ _io_service.run_one ();
+ } while (ec == boost::asio::error::would_block);
+
+ delete _acceptor;
+ _acceptor = 0;
+
+ if (ec) {
+ throw NetworkError (String::compose (_("error during async_accept (%1)"), ec.value ()));
+ }
+}
+
/** Blocking write.
* @param data Buffer to write.
* @param size Number of bytes to write.
} while (ec == boost::asio::error::would_block);
if (ec) {
- throw NetworkError (ec.message ());
+ throw NetworkError (String::compose (_("error during async_write (%1)"), ec.value ()));
}
}
} while (ec == boost::asio::error::would_block);
if (ec) {
- throw NetworkError (ec.message ());
+ throw NetworkError (String::compose (_("error during async_read (%1)"), ec.value ()));
}
}
return a - (a % t);
}
+/** @param n A number.
+ * @param r Rounding `boundary' (must be a power of 2)
+ * @return n rounded to the nearest r
+ */
+int
+round_to (float n, int r)
+{
+ assert (r == 1 || r == 2 || r == 4);
+ return int (n + float(r) / 2) &~ (r - 1);
+}
+
/** Read a sequence of key / value pairs from a text stream;
* the keys are the first words on the line, and the values are
* the remainder of the line following the key. Lines beginning
get_required_int (multimap<string, string> const & kv, string k)
{
string const v = get_required_string (kv, k);
- return lexical_cast<int> (v);
+ return raw_convert<int> (v);
}
float
get_required_float (multimap<string, string> const & kv, string k)
{
string const v = get_required_string (kv, k);
- return lexical_cast<float> (v);
+ return raw_convert<float> (v);
}
string
return 0;
}
- return lexical_cast<int> (i->second);
+ return raw_convert<int> (i->second);
}
/** Trip an assert if the caller is not in the UI thread */
assert (boost::this_thread::get_id() == ui_thread);
}
-/** @param v Content video frame.
- * @param audio_sample_rate Source audio sample rate.
- * @param frames_per_second Number of video frames per second.
- * @return Equivalent number of audio frames for `v'.
- */
-int64_t
-video_frames_to_audio_frames (VideoContent::Frame v, float audio_sample_rate, float frames_per_second)
-{
- return ((int64_t) v * audio_sample_rate / frames_per_second);
-}
-
string
audio_channel_name (int c)
{
- assert (MAX_AUDIO_CHANNELS == 6);
+ assert (MAX_DCP_AUDIO_CHANNELS == 12);
/* TRANSLATORS: these are the names of audio channels; Lfe (sub) is the low-frequency
- enhancement channel (sub-woofer)./
+ enhancement channel (sub-woofer). HI is the hearing-impaired audio track and
+ VI is the visually-impaired audio track (audio describe).
*/
string const channels[] = {
_("Left"),
_("Lfe (sub)"),
_("Left surround"),
_("Right surround"),
+ _("Hearing impaired"),
+ _("Visually impaired"),
+ _("Left centre"),
+ _("Right centre"),
+ _("Left rear surround"),
+ _("Right rear surround"),
};
return channels[c];
}
-FrameRateConversion::FrameRateConversion (float source, int dcp)
- : skip (false)
- , repeat (false)
- , change_speed (false)
+bool
+valid_image_file (boost::filesystem::path f)
{
- if (fabs (source / 2.0 - dcp) < (fabs (source - dcp))) {
- skip = true;
- } else if (fabs (source * 2 - dcp) < fabs (source - dcp)) {
- repeat = true;
+ string ext = f.extension().string();
+ transform (ext.begin(), ext.end(), ext.begin(), ::tolower);
+ return (ext == ".tif" || ext == ".tiff" || ext == ".jpg" || ext == ".jpeg" || ext == ".png" || ext == ".bmp" || ext == ".tga" || ext == ".dpx");
+}
+
+string
+tidy_for_filename (string f)
+{
+ string t;
+ for (size_t i = 0; i < f.length(); ++i) {
+ if (isalnum (f[i]) || f[i] == '_' || f[i] == '-') {
+ t += f[i];
+ } else {
+ t += '_';
+ }
}
- change_speed = !about_equal (source * factor(), dcp);
+ return t;
+}
- if (!skip && !repeat && !change_speed) {
- description = _("DCP and source have the same rate.\n");
- } else {
- if (skip) {
- description = _("DCP will use every other frame of the source.\n");
- } else if (repeat) {
- description = _("Each source frame will be doubled in the DCP.\n");
+map<string, string>
+split_get_request (string url)
+{
+ enum {
+ AWAITING_QUESTION_MARK,
+ KEY,
+ VALUE
+ } state = AWAITING_QUESTION_MARK;
+
+ map<string, string> r;
+ string k;
+ string v;
+ for (size_t i = 0; i < url.length(); ++i) {
+ switch (state) {
+ case AWAITING_QUESTION_MARK:
+ if (url[i] == '?') {
+ state = KEY;
+ }
+ break;
+ case KEY:
+ if (url[i] == '=') {
+ v.clear ();
+ state = VALUE;
+ } else {
+ k += url[i];
+ }
+ break;
+ case VALUE:
+ if (url[i] == '&') {
+ r.insert (make_pair (k, v));
+ k.clear ();
+ state = KEY;
+ } else {
+ v += url[i];
+ }
+ break;
}
+ }
- if (change_speed) {
- float const pc = dcp * 100 / (source * factor());
- description += String::compose (_("DCP will run at %1%% of the source speed.\n"), pc);
- }
+ if (state == VALUE) {
+ r.insert (make_pair (k, v));
+ }
+
+ return r;
+}
+
+dcp::Size
+fit_ratio_within (float ratio, dcp::Size full_frame, int round)
+{
+ if (ratio < full_frame.ratio ()) {
+ return dcp::Size (round_to (full_frame.height * ratio, round), full_frame.height);
+ }
+
+ return dcp::Size (full_frame.width, round_to (full_frame.width / ratio, round));
+}
+
+void *
+wrapped_av_malloc (size_t s)
+{
+ void* p = av_malloc (s);
+ if (!p) {
+ throw bad_alloc ();
}
+ return p;
+}
+
+string
+entities_to_text (string e)
+{
+ boost::algorithm::replace_all (e, "%3A", ":");
+ boost::algorithm::replace_all (e, "%2F", "/");
+ return e;
}
-LocaleGuard::LocaleGuard ()
- : _old (0)
+int64_t
+divide_with_round (int64_t a, int64_t b)
{
- char const * old = setlocale (LC_NUMERIC, 0);
+ if (a % b >= (b / 2)) {
+ return (a + b - 1) / b;
+ } else {
+ return a / b;
+ }
+}
- if (old) {
- _old = strdup (old);
- if (strcmp (_old, "C")) {
- setlocale (LC_NUMERIC, "C");
- }
- }
+/** Return a user-readable string summarising the versions of our dependencies */
+string
+dependency_version_summary ()
+{
+ SafeStringStream s;
+ s << N_("libopenjpeg ") << opj_version () << N_(", ")
+ << N_("libavcodec ") << ffmpeg_version_to_string (avcodec_version()) << N_(", ")
+ << N_("libavfilter ") << ffmpeg_version_to_string (avfilter_version()) << N_(", ")
+ << N_("libavformat ") << ffmpeg_version_to_string (avformat_version()) << N_(", ")
+ << N_("libavutil ") << ffmpeg_version_to_string (avutil_version()) << N_(", ")
+ << N_("libswscale ") << ffmpeg_version_to_string (swscale_version()) << N_(", ")
+ << MagickVersion << N_(", ")
+ << N_("libssh ") << ssh_version (0) << N_(", ")
+ << N_("libdcp ") << dcp::version << N_(" git ") << dcp::git_commit;
+
+ return s.str ();
+}
+
+/** Construct a ScopedTemporary. A temporary filename is decided but the file is not opened
+ * until ::open() is called.
+ */
+ScopedTemporary::ScopedTemporary ()
+ : _open (0)
+{
+ _file = boost::filesystem::temp_directory_path() / boost::filesystem::unique_path ();
}
-LocaleGuard::~LocaleGuard ()
+/** Close and delete the temporary file */
+ScopedTemporary::~ScopedTemporary ()
{
- setlocale (LC_NUMERIC, _old);
- free (_old);
+ close ();
+ boost::system::error_code ec;
+ boost::filesystem::remove (_file, ec);
+}
+
+/** @return temporary filename */
+char const *
+ScopedTemporary::c_str () const
+{
+ return _file.string().c_str ();
+}
+
+/** Open the temporary file.
+ * @return File's FILE pointer.
+ */
+FILE*
+ScopedTemporary::open (char const * params)
+{
+ _open = fopen (c_str(), params);
+ return _open;
+}
+
+/** Close the file */
+void
+ScopedTemporary::close ()
+{
+ if (_open) {
+ fclose (_open);
+ _open = 0;
+ }
+}
+
+ContentTimePeriod
+subtitle_period (AVSubtitle const & sub)
+{
+ ContentTime const packet_time = ContentTime::from_seconds (static_cast<double> (sub.pts) / AV_TIME_BASE);
+
+ ContentTimePeriod period (
+ packet_time + ContentTime::from_seconds (sub.start_display_time / 1e3),
+ packet_time + ContentTime::from_seconds (sub.end_display_time / 1e3)
+ );
+
+ return period;
}