X-Git-Url: https://git.carlh.net/gitweb/?a=blobdiff_plain;f=src%2Flib%2Futil.cc;h=06da94294e4b8fe877d155c9c9158dedd73c7a29;hb=d62877ae6c4e316e43f4052e4b9ba673610012cf;hp=fbe77461e9ec7ade62b976d11ea74fdc3d871b78;hpb=13511ed2fcc23f4d5f9c507c775c3c5cfd82d155;p=dcpomatic.git diff --git a/src/lib/util.cc b/src/lib/util.cc index fbe77461e..06da94294 100644 --- a/src/lib/util.cc +++ b/src/lib/util.cc @@ -26,6 +26,7 @@ #include #include #include +#include #ifdef DVDOMATIC_POSIX #include #include @@ -35,6 +36,9 @@ #include #include #include +#include +#include +#include #include #include #include @@ -54,15 +58,34 @@ extern "C" { #include "format.h" #include "dcp_content_type.h" #include "filter.h" -#include "screen.h" -#include "film_state.h" #include "sound_processor.h" -#ifndef DVDOMATIC_DISABLE_PLAYER -#include "player_manager.h" -#endif - -using namespace std; -using namespace boost; +#include "config.h" + +#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::istream; +using std::numeric_limits; +using std::pair; +using boost::shared_ptr; +using boost::thread; +using boost::lexical_cast; +using libdcp::Size; + +thread::id ui_thread; /** Convert some number of seconds to a string representation * in hours, minutes and seconds. @@ -80,9 +103,9 @@ seconds_to_hms (int s) m -= (h * 60); stringstream hms; - hms << h << ":"; + hms << h << N_(":"); hms.width (2); - hms << setfill ('0') << m << ":"; + hms << setfill ('0') << m << N_(":"); hms.width (2); hms << setfill ('0') << s; @@ -104,22 +127,22 @@ seconds_to_approximate_hms (int s) if (h > 0) { if (m > 30) { - ap << (h + 1) << " hours"; + ap << (h + 1) << N_(" ") << _("hours"); } else { if (h == 1) { - ap << "1 hour"; + ap << N_("1 ") << _("hour"); } else { - ap << h << " hours"; + ap << h << N_(" ") << _("hours"); } } } else if (m > 0) { if (m == 1) { - ap << "1 minute"; + ap << N_("1 ") << _("minute"); } else { - ap << m << " minutes"; + ap << m << N_(" ") << _("minutes"); } } else { - ap << s << " seconds"; + ap << s << N_(" ") << _("seconds"); } return ap.str (); @@ -132,12 +155,12 @@ seconds_to_approximate_hms (int s) static string demangle (string l) { - string::size_type const b = l.find_first_of ("("); + string::size_type const b = l.find_first_of (N_("(")); if (b == string::npos) { return l; } - string::size_type const p = l.find_last_of ("+"); + string::size_type const p = l.find_last_of (N_("+")); if (p == string::npos) { return l; } @@ -180,7 +203,7 @@ stacktrace (ostream& out, int levels) if (strings) { for (i = 0; i < size && (levels == 0 || i < size_t(levels)); i++) { - out << " " << demangle (strings[i]) << endl; + out << N_(" ") << demangle (strings[i]) << endl; } free (strings); @@ -188,65 +211,6 @@ stacktrace (ostream& out, int levels) } #endif -/** @param s Sample format. - * @return String representation. - */ -string -audio_sample_format_to_string (AVSampleFormat s) -{ - /* Our sample format handling is not exactly complete */ - - switch (s) { - case AV_SAMPLE_FMT_S16: - return "S16"; - default: - break; - } - - return "Unknown"; -} - -/** @param s String representation of a sample format, as returned from audio_sample_format_to_string(). - * @return Sample format. - */ -AVSampleFormat -audio_sample_format_from_string (string s) -{ - if (s == "S16") { - return AV_SAMPLE_FMT_S16; - } - - return AV_SAMPLE_FMT_NONE; -} - -/** @return Version of vobcopy that is on the path (and hence that we will use) */ -static string -vobcopy_version () -{ - FILE* f = popen ("vobcopy -V 2>&1", "r"); - if (f == 0) { - throw EncodeError ("could not run vobcopy to check version"); - } - - string version = "unknown"; - - while (!feof (f)) { - char buf[256]; - if (fgets (buf, sizeof (buf), f)) { - string s (buf); - vector b; - split (b, s, is_any_of (" ")); - if (b.size() >= 2 && b[0] == "Vobcopy") { - version = b[1]; - } - } - } - - pclose (f); - - return version; -} - /** @param v Version as used by FFmpeg. * @return A string representation of v. */ @@ -254,7 +218,7 @@ static string ffmpeg_version_to_string (int v) { stringstream s; - s << ((v & 0xff0000) >> 16) << "." << ((v & 0xff00) >> 8) << "." << (v & 0xff); + s << ((v & 0xff0000) >> 16) << N_(".") << ((v & 0xff00) >> 8) << N_(".") << (v & 0xff); return s.str (); } @@ -263,17 +227,16 @@ string dependency_version_summary () { stringstream s; - s << "libopenjpeg " << opj_version () << ", " - << "vobcopy " << vobcopy_version() << ", " - << "libavcodec " << ffmpeg_version_to_string (avcodec_version()) << ", " - << "libavfilter " << ffmpeg_version_to_string (avfilter_version()) << ", " - << "libavformat " << ffmpeg_version_to_string (avformat_version()) << ", " - << "libavutil " << ffmpeg_version_to_string (avutil_version()) << ", " - << "libpostproc " << ffmpeg_version_to_string (postproc_version()) << ", " - << "libswscale " << ffmpeg_version_to_string (swscale_version()) << ", " - << MagickVersion << ", " - << "libssh " << ssh_version (0) << ", " - << "libdcp " << libdcp::version << " git " << libdcp::git_commit; + 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 (); } @@ -284,44 +247,83 @@ seconds (struct timeval t) return t.tv_sec + (double (t.tv_usec) / 1e6); } - -#ifdef DVDOMATIC_POSIX -void -sigchld_handler (int, siginfo_t* info, void *) -{ -#ifndef DVDOMATIC_DISABLE_PLAYER - PlayerManager::instance()->child_exited (info->si_pid); -#endif -} -#endif - -/** Call the required functions to set up DVD-o-matic's static arrays, etc. */ +/** Call the required functions to set up DVD-o-matic's static arrays, etc. + * Must be called from the UI thread, if there is one. + */ void dvdomatic_setup () { + avfilter_register_all (); + Format::setup_formats (); DCPContentType::setup_dcp_content_types (); Scaler::setup_scalers (); Filter::setup_filters (); SoundProcessor::setup_sound_processors (); -#ifdef DVDOMATIC_POSIX - struct sigaction sa; - sa.sa_flags = SA_SIGINFO; - sigemptyset (&sa.sa_mask); - sa.sa_sigaction = sigchld_handler; - sigaction (SIGCHLD, &sa, 0); + ui_thread = boost::this_thread::get_id (); +} + +#ifdef DVDOMATIC_WINDOWS +boost::filesystem::path +mo_path () +{ + wchar_t buffer[512]; + GetModuleFileName (0, buffer, 512 * sizeof(wchar_t)); + boost::filesystem::path p (buffer); + p = p.parent_path (); + p = p.parent_path (); + p /= "locale"; + return p; +} +#endif + +void +dvdomatic_setup_i18n (string lang) +{ +#ifdef DVDOMATIC_POSIX + lang += ".UTF8"; +#endif + + if (!lang.empty ()) { + /* Override our environment language; this is essential on + Windows. + */ + 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); + } + + setlocale (LC_ALL, ""); + textdomain ("libdvdomatic"); + +#ifdef DVDOMATIC_WINDOWS + bindtextdomain ("libdvdomatic", mo_path().string().c_str()); + bind_textdomain_codeset ("libdvdomatic", "UTF8"); #endif + +#ifdef DVDOMATIC_POSIX + bindtextdomain ("libdvdomatic", POSIX_LOCALE_PREFIX); +#endif } +/** @param start Start position for the crop within the image. + * @param size Size of the cropped area. + * @return FFmpeg crop filter string. + */ string -crop_string (Position start, Size size) +crop_string (Position start, libdcp::Size size) { stringstream s; - s << "crop=" << size.width << ":" << size.height << ":" << start.x << ":" << start.y; + s << N_("crop=") << size.width << N_(":") << size.height << N_(":") << start.x << N_(":") << start.y; return s.str (); } +/** @param s A string. + * @return Parts of the string split at spaces, except when a space is within quotation marks. + */ vector split_at_spaces_considering_quotes (string s) { @@ -331,7 +333,7 @@ split_at_spaces_considering_quotes (string s) for (string::size_type i = 0; i < s.length(); ++i) { if (s[i] == ' ' && !in_quotes) { out.push_back (c); - c = ""; + c = N_(""); } else if (s[i] == '"') { in_quotes = !in_quotes; } else { @@ -364,11 +366,11 @@ md5_digest (void const * data, int size) * @return MD5 digest of file's contents. */ string -md5_digest (string file) +md5_digest (boost::filesystem::path file) { - ifstream f (file.c_str(), ios::binary); + ifstream f (file.string().c_str(), ios::binary); if (!f.good ()) { - throw OpenFileError (file); + throw OpenFileError (file.string()); } f.seekg (0, ios::end); @@ -398,6 +400,88 @@ md5_digest (string file) return s.str (); } +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 + */ + + return (fabs (a - b) < 1e-4); +} + +class FrameRateCandidate +{ +public: + FrameRateCandidate (float source_, int dcp_) + : source (source_) + , dcp (dcp_) + {} + + float source; + int dcp; +}; + +int +best_dcp_frame_rate (float source_fps) +{ + list const allowed_dcp_frame_rates = Config::instance()->allowed_dcp_frame_rates (); + + /* Work out what rates we could manage, including those achieved by using skip / repeat. */ + list candidates; + + /* Start with the ones without skip / repeat so they will get matched in preference to skipped/repeated ones */ + for (list::const_iterator i = allowed_dcp_frame_rates.begin(); i != allowed_dcp_frame_rates.end(); ++i) { + candidates.push_back (FrameRateCandidate (*i, *i)); + } + + /* Then the skip/repeat ones */ + for (list::const_iterator i = allowed_dcp_frame_rates.begin(); i != allowed_dcp_frame_rates.end(); ++i) { + candidates.push_back (FrameRateCandidate (float (*i) / 2, *i)); + candidates.push_back (FrameRateCandidate (float (*i) * 2, *i)); + } + + /* Pick the best one, bailing early if we hit an exact match */ + float error = numeric_limits::max (); + boost::optional best; + list::iterator i = candidates.begin(); + while (i != candidates.end()) { + + if (about_equal (i->source, source_fps)) { + best = *i; + break; + } + + float const e = fabs (i->source - source_fps); + if (e < error) { + error = e; + best = *i; + } + + ++i; + } + + assert (best); + return best->dcp; +} + /** @param An arbitrary sampling rate. * @return The appropriate DCP-approved sampling rate (48kHz or 96kHz). */ @@ -411,16 +495,6 @@ dcp_audio_sample_rate (int fs) return 96000; } -bool operator== (Crop const & a, Crop const & b) -{ - return (a.left == b.left && a.right == b.right && a.top == b.top && a.bottom == b.bottom); -} - -bool operator!= (Crop const & a, Crop const & b) -{ - return !(a == b); -} - /** @param index Colour LUT index. * @return Human-readable name. */ @@ -429,195 +503,476 @@ colour_lut_index_to_name (int index) { switch (index) { case 0: - return "sRGB"; + return _("sRGB"); case 1: - return "Rec 709"; + return _("Rec 709"); } assert (false); - return ""; + return N_(""); } -Socket::Socket () +Socket::Socket (int timeout) : _deadline (_io_service) , _socket (_io_service) - , _buffer_data (0) + , _timeout (timeout) { - _deadline.expires_at (posix_time::pos_infin); + _deadline.expires_at (boost::posix_time::pos_infin); check (); } void Socket::check () { - if (_deadline.expires_at() <= asio::deadline_timer::traits_type::now ()) { + if (_deadline.expires_at() <= boost::asio::deadline_timer::traits_type::now ()) { _socket.close (); - _deadline.expires_at (posix_time::pos_infin); + _deadline.expires_at (boost::posix_time::pos_infin); } _deadline.async_wait (boost::bind (&Socket::check, this)); } -/** Blocking connect with timeout. +/** Blocking connect. * @param endpoint End-point to connect to. - * @param timeout Time-out in seconds. */ void -Socket::connect (asio::ip::basic_resolver_entry const & endpoint, int timeout) +Socket::connect (boost::asio::ip::basic_resolver_entry const & endpoint) { - system::error_code ec = asio::error::would_block; - _socket.async_connect (endpoint, lambda::var(ec) = lambda::_1); + _deadline.expires_from_now (boost::posix_time::seconds (_timeout)); + boost::system::error_code ec = boost::asio::error::would_block; + _socket.async_connect (endpoint, boost::lambda::var(ec) = boost::lambda::_1); do { _io_service.run_one(); - } while (ec == asio::error::would_block); + } while (ec == boost::asio::error::would_block); if (ec || !_socket.is_open ()) { - throw NetworkError ("connect timed out"); + throw NetworkError (_("connect timed out")); } } -/** Blocking write with timeout. +/** Blocking write. * @param data Buffer to write. * @param size Number of bytes to write. - * @param timeout Time-out, in seconds. */ void -Socket::write (uint8_t const * data, int size, int timeout) +Socket::write (uint8_t const * data, int size) { - _deadline.expires_from_now (posix_time::seconds (timeout)); - system::error_code ec = asio::error::would_block; + _deadline.expires_from_now (boost::posix_time::seconds (_timeout)); + boost::system::error_code ec = boost::asio::error::would_block; - asio::async_write (_socket, asio::buffer (data, size), lambda::var(ec) = lambda::_1); + boost::asio::async_write (_socket, boost::asio::buffer (data, size), boost::lambda::var(ec) = boost::lambda::_1); + do { _io_service.run_one (); - } while (ec == asio::error::would_block); + } while (ec == boost::asio::error::would_block); if (ec) { - throw NetworkError ("write timed out"); + throw NetworkError (ec.message ()); } } -/** Blocking read with timeout. +void +Socket::write (uint32_t v) +{ + v = htonl (v); + write (reinterpret_cast (&v), 4); +} + +/** Blocking read. * @param data Buffer to read to. * @param size Number of bytes to read. - * @param timeout Time-out, in seconds. */ -int -Socket::read (uint8_t* data, int size, int timeout) +void +Socket::read (uint8_t* data, int size) { - _deadline.expires_from_now (posix_time::seconds (timeout)); - system::error_code ec = asio::error::would_block; - - int amount_read = 0; + _deadline.expires_from_now (boost::posix_time::seconds (_timeout)); + boost::system::error_code ec = boost::asio::error::would_block; - _socket.async_read_some ( - asio::buffer (data, size), - (lambda::var(ec) = lambda::_1, lambda::var(amount_read) = lambda::_2) - ); + boost::asio::async_read (_socket, boost::asio::buffer (data, size), boost::lambda::var(ec) = boost::lambda::_1); do { _io_service.run_one (); - } while (ec == asio::error::would_block); + } while (ec == boost::asio::error::would_block); if (ec) { - amount_read = 0; + throw NetworkError (ec.message ()); + } +} + +uint32_t +Socket::read_uint32 () +{ + uint32_t v; + read (reinterpret_cast (&v), 4); + return ntohl (v); +} + +/** @param other A Rect. + * @return The intersection of this with `other'. + */ +Rect +Rect::intersection (Rect const & other) const +{ + int const tx = max (x, other.x); + int const ty = max (y, other.y); + + return Rect ( + tx, ty, + min (x + width, other.x + other.width) - tx, + min (y + height, other.y + other.height) - ty + ); +} + +/** Round a number up to the nearest multiple of another number. + * @param c Index. + * @param s Array of numbers to round, indexed by c. + * @param t Multiple to round to. + * @return Rounded number. + */ +int +stride_round_up (int c, int const * stride, int t) +{ + int const a = stride[c] + (t - 1); + return a - (a % t); +} + +int +stride_lookup (int c, int const * stride) +{ + return stride[c]; +} + +/** 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 + * with # are ignored. + * @param s Stream to read. + * @return key/value pairs. + */ +multimap +read_key_value (istream &s) +{ + multimap kv; + + string line; + while (getline (s, line)) { + if (line.empty ()) { + continue; + } + + if (line[0] == '#') { + continue; + } + + if (line[line.size() - 1] == '\r') { + line = line.substr (0, line.size() - 1); + } + + size_t const s = line.find (' '); + if (s == string::npos) { + continue; + } + + kv.insert (make_pair (line.substr (0, s), line.substr (s + 1))); + } + + return kv; +} + +string +get_required_string (multimap const & kv, string k) +{ + if (kv.count (k) > 1) { + throw StringError (N_("unexpected multiple keys in key-value set")); + } + + multimap::const_iterator i = kv.find (k); + + if (i == kv.end ()) { + throw StringError (String::compose (_("missing key %1 in key-value set"), k)); } - return amount_read; + return i->second; +} + +int +get_required_int (multimap const & kv, string k) +{ + string const v = get_required_string (kv, k); + return lexical_cast (v); +} + +float +get_required_float (multimap const & kv, string k) +{ + string const v = get_required_string (kv, k); + return lexical_cast (v); } -/** Mark some data as being `consumed', so that it will not be returned - * as data again. - * @param size Amount of data to consume, in bytes. +string +get_optional_string (multimap const & kv, string k) +{ + if (kv.count (k) > 1) { + throw StringError (N_("unexpected multiple keys in key-value set")); + } + + multimap::const_iterator i = kv.find (k); + if (i == kv.end ()) { + return N_(""); + } + + return i->second; +} + +int +get_optional_int (multimap const & kv, string k) +{ + if (kv.count (k) > 1) { + throw StringError (N_("unexpected multiple keys in key-value set")); + } + + multimap::const_iterator i = kv.find (k); + if (i == kv.end ()) { + return 0; + } + + return lexical_cast (i->second); +} + +/** Construct an AudioBuffers. Audio data is undefined after this constructor. + * @param channels Number of channels. + * @param frames Number of frames to reserve space for. + */ +AudioBuffers::AudioBuffers (int channels, int frames) + : _channels (channels) + , _frames (frames) + , _allocated_frames (frames) +{ + _data = new float*[_channels]; + for (int i = 0; i < _channels; ++i) { + _data[i] = new float[frames]; + } +} + +/** Copy constructor. + * @param other Other AudioBuffers; data is copied. + */ +AudioBuffers::AudioBuffers (AudioBuffers const & other) + : _channels (other._channels) + , _frames (other._frames) + , _allocated_frames (other._frames) +{ + _data = new float*[_channels]; + for (int i = 0; i < _channels; ++i) { + _data[i] = new float[_frames]; + memcpy (_data[i], other._data[i], _frames * sizeof (float)); + } +} + +/** AudioBuffers destructor */ +AudioBuffers::~AudioBuffers () +{ + for (int i = 0; i < _channels; ++i) { + delete[] _data[i]; + } + + delete[] _data; +} + +/** @param c Channel index. + * @return Buffer for this channel. + */ +float* +AudioBuffers::data (int c) const +{ + assert (c >= 0 && c < _channels); + return _data[c]; +} + +/** Set the number of frames that these AudioBuffers will report themselves + * as having. + * @param f Frames; must be less than or equal to the number of allocated frames. */ void -Socket::consume (int size) +AudioBuffers::set_frames (int f) { - assert (_buffer_data >= size); + assert (f <= _allocated_frames); + _frames = f; +} + +/** Make all samples on all channels silent */ +void +AudioBuffers::make_silent () +{ + for (int i = 0; i < _channels; ++i) { + make_silent (i); + } +} + +/** Make all samples on a given channel silent. + * @param c Channel. + */ +void +AudioBuffers::make_silent (int c) +{ + assert (c >= 0 && c < _channels); - _buffer_data -= size; - if (_buffer_data > 0) { - /* Shift still-valid data to the start of the buffer */ - memmove (_buffer, _buffer + size, _buffer_data); + for (int i = 0; i < _frames; ++i) { + _data[c][i] = 0; } } -/** Read a definite amount of data from our socket, and mark - * it as consumed. - * @param data Where to put the data. - * @param size Number of bytes to read. +/** Copy data from another AudioBuffers to this one. All channels are copied. + * @param from AudioBuffers to copy from; must have the same number of channels as this. + * @param frames_to_copy Number of frames to copy. + * @param read_offset Offset to read from in `from'. + * @param write_offset Offset to write to in `to'. */ void -Socket::read_definite_and_consume (uint8_t* data, int size, int timeout) -{ - int const from_buffer = min (_buffer_data, size); - if (from_buffer > 0) { - /* Get data from our buffer */ - memcpy (data, _buffer, from_buffer); - consume (from_buffer); - /* Update our output state */ - data += from_buffer; - size -= from_buffer; - } - - /* read() the rest */ - while (size > 0) { - int const n = read (data, size, timeout); - if (n <= 0) { - throw NetworkError ("could not read"); - } +AudioBuffers::copy_from (AudioBuffers* from, int frames_to_copy, int read_offset, int write_offset) +{ + assert (from->channels() == channels()); - data += n; - size -= n; + assert (from); + assert (read_offset >= 0 && (read_offset + frames_to_copy) <= from->_allocated_frames); + assert (write_offset >= 0 && (write_offset + frames_to_copy) <= _allocated_frames); + + for (int i = 0; i < _channels; ++i) { + memcpy (_data[i] + write_offset, from->_data[i] + read_offset, frames_to_copy * sizeof(float)); } } -/** Read as much data as is available, up to some limit. - * @param data Where to put the data. - * @param size Maximum amount of data to read. +/** Move audio data around. + * @param from Offset to move from. + * @param to Offset to move to. + * @param frames Number of frames to move. */ + +void +AudioBuffers::move (int from, int to, int frames) +{ + if (frames == 0) { + return; + } + + assert (from >= 0); + assert (from < _frames); + assert (to >= 0); + assert (to < _frames); + assert (frames > 0); + assert (frames <= _frames); + assert ((from + frames) <= _frames); + assert ((to + frames) <= _frames); + + for (int i = 0; i < _channels; ++i) { + memmove (_data[i] + to, _data[i] + from, frames * sizeof(float)); + } +} + +/** Add data from from `from', `from_channel' to our channel `to_channel' */ void -Socket::read_indefinite (uint8_t* data, int size, int timeout) +AudioBuffers::accumulate (shared_ptr from, int from_channel, int to_channel) { - assert (size < int (sizeof (_buffer))); + int const N = frames (); + assert (from->frames() == N); - /* Amount of extra data we need to read () */ - int to_read = size - _buffer_data; - while (to_read > 0) { - /* read as much of it as we can (into our buffer) */ - int const n = read (_buffer + _buffer_data, to_read, timeout); - if (n <= 0) { - throw NetworkError ("could not read"); - } + float* s = from->data (from_channel); + float* d = _data[to_channel]; - to_read -= n; - _buffer_data += n; + for (int i = 0; i < N; ++i) { + *d++ += *s++; } +} - assert (_buffer_data >= size); +/** Trip an assert if the caller is not in the UI thread */ +void +ensure_ui_thread () +{ + assert (boost::this_thread::get_id() == ui_thread); +} - /* copy data into the output buffer */ - assert (size >= _buffer_data); - memcpy (data, _buffer, size); +/** @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 (ContentVideoFrame v, float audio_sample_rate, float frames_per_second) +{ + return ((int64_t) v * audio_sample_rate / frames_per_second); } -Rectangle -Rectangle::intersection (Rectangle const & other) const +/** @return A pair containing CPU model name and the number of processors */ +pair +cpu_info () { - int const tx = max (x, other.x); - int const ty = max (y, other.y); + pair info; + info.second = 0; - return Rectangle ( - tx, ty, - min (x + w, other.x + other.w) - tx, - min (y + h, other.y + other.h) - ty - ); +#ifdef DVDOMATIC_POSIX + ifstream f (N_("/proc/cpuinfo")); + while (f.good ()) { + string l; + getline (f, l); + if (boost::algorithm::starts_with (l, N_("model name"))) { + string::size_type const c = l.find (':'); + if (c != string::npos) { + info.first = l.substr (c + 2); + } + } else if (boost::algorithm::starts_with (l, N_("processor"))) { + ++info.second; + } + } +#endif + + return info; } -int -round_up (int a, int t) +string +audio_channel_name (int c) { - a += (t - 1); - return a - (a % t); + assert (MAX_AUDIO_CHANNELS == 6); + + /* TRANSLATORS: these are the names of audio channels; Lfe (sub) is the low-frequency + enhancement channel (sub-woofer)./ + */ + string const channels[] = { + _("Left"), + _("Right"), + _("Centre"), + _("Lfe (sub)"), + _("Left surround"), + _("Right surround"), + }; + + return channels[c]; } +FrameRateConversion::FrameRateConversion (float source, int dcp) + : skip (false) + , repeat (false) + , change_speed (false) +{ + if (fabs (source / 2.0 - dcp) < (fabs (source - dcp))) { + skip = true; + } else if (fabs (source * 2 - dcp) < fabs (source - dcp)) { + repeat = true; + } + + change_speed = !about_equal (source * factor(), dcp); + + 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"); + } + + if (change_speed) { + float const pc = dcp * 100 / (source * factor()); + description += String::compose (_("DCP will run at %1%% of the source speed.\n"), pc); + } + } +}