// Copyright (c) 2005, Rodrigo Braz Monteiro // All rights reserved. // // Redistribution and use in source and binary forms, with or without // modification, are permitted provided that the following conditions are met: // // * Redistributions of source code must retain the above copyright notice, // this list of conditions and the following disclaimer. // * Redistributions in binary form must reproduce the above copyright notice, // this list of conditions and the following disclaimer in the documentation // and/or other materials provided with the distribution. // * Neither the name of the Aegisub Group nor the names of its contributors // may be used to endorse or promote products derived from this software // without specific prior written permission. // // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" // AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE // IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE // ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE // LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR // CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF // SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS // INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN // CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) // ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE // POSSIBILITY OF SUCH DAMAGE. // // Aegisub Project http://www.aegisub.org/ // // $Id$ /// @file ass_time.cpp /// @brief Class for managing timestamps in subtitles /// @ingroup subs_storage /// //////////// // Includes #include "config.h" #ifndef AGI_PRE #include #include #include #include #endif #include "ass_time.h" #include "utils.h" /// @brief AssTime constructors AssTime::AssTime() : time(0) { } AssTime::AssTime(int time) { SetMS(time); } /// @brief Note that this function is atomic, it won't touch the values if it's invalid. --------------- Parses from ASS /// @param text /// @return /// void AssTime::ParseASS (const wxString text) { // Prepare size_t pos = 0; size_t end = 0; long th=0,tm=0,tms=0; // Count the number of colons size_t len = text.Length(); int colons = 0; for (pos=0;pos 2) { for (pos=0;pos= 1) { while (text[end++] != ':') {}; tm = AegiStringToInt(text,pos,end); pos = end; } // Miliseconds (includes seconds) end = text.Length(); tms = AegiStringToFix(text,3,pos,end); } // Something went wrong, don't change anything catch (...) { return; } // OK, set values SetMS(tms + tm*60000 + th*3600000); } /// @brief AssTime conversion to/from miliseconds /// @return /// int AssTime::GetMS () const { if (!UseMSPrecision) return time/10*10; else return time; } /// @brief DOCME /// @param _ms /// void AssTime::SetMS (int ms) { time = mid(0, ms, 10 * 60 * 60 * 1000 - 1); } /// @brief ASS Formated /// @param msPrecision /// @return /// wxString AssTime::GetASSFormated (bool msPrecision) const { int ms = time; // Centisecond precision msPrecision = msPrecision || UseMSPrecision; if (!msPrecision) ms = ms/10*10; int h = ms / (1000 * 60 * 60); int m = (ms / (1000 * 60)) % 60; int s = (ms / 1000) % 60; ms = ms % 1000; if (msPrecision) return wxString::Format("%01i:%02i:%02i.%03i",h,m,s,ms); else return wxString::Format("%01i:%02i:%02i.%02i",h,m,s,ms/10); } /// @brief AssTime comparison /// @param t1 /// @param t2 /// @return /// bool operator < (const AssTime &t1, const AssTime &t2) { return (t1.GetMS() < t2.GetMS()); } /// @brief DOCME /// @param t1 /// @param t2 /// @return /// bool operator > (const AssTime &t1, const AssTime &t2) { return (t1.GetMS() > t2.GetMS()); } /// @brief DOCME /// @param t1 /// @param t2 /// @return /// bool operator <= (const AssTime &t1, const AssTime &t2) { return (t1.GetMS() <= t2.GetMS()); } /// @brief DOCME /// @param t1 /// @param t2 /// @return /// bool operator >= (const AssTime &t1, const AssTime &t2) { return (t1.GetMS() >= t2.GetMS()); } /// @brief DOCME /// @param t1 /// @param t2 /// @return /// bool operator == (const AssTime &t1, const AssTime &t2) { return (t1.GetMS() == t2.GetMS()); } /// @brief DOCME /// @param t1 /// @param t2 /// @return /// bool operator != (const AssTime &t1, const AssTime &t2) { return (t1.GetMS() != t2.GetMS()); } AssTime operator + (const AssTime &t1, const AssTime &t2) { return AssTime(t1.GetMS() + t2.GetMS()); } AssTime operator - (const AssTime &t1, const AssTime &t2) { return AssTime(t1.GetMS() - t2.GetMS()); } /// DOCME bool AssTime::UseMSPrecision = false; /// @brief Get /// @return /// int AssTime::GetTimeHours() { return time / 3600000; } /// @brief DOCME /// @return /// int AssTime::GetTimeMinutes() { return (time % 3600000)/60000; } /// @brief DOCME /// @return /// int AssTime::GetTimeSeconds() { return (time % 60000)/1000; } /// @brief DOCME /// @return /// int AssTime::GetTimeMiliseconds() { return (time % 1000); } /// @brief DOCME /// @return /// int AssTime::GetTimeCentiseconds() { return (time % 1000)/10; } /// @brief Constructor /// @param separator /// @param numerator /// @param denominator /// @param dropframe /// FractionalTime::FractionalTime (wxString separator, int numerator, int denominator, bool dropframe) { drop = dropframe; if (drop) { // no dropframe for any other framerates num = 30000; den = 1001; } else { num = numerator; den = denominator; } sep = separator; // fractions < 1 are not welcome here if ((num <= 0 || den <= 0) || (num < den)) throw "FractionalTime: nonsensical enumerator or denominator"; if (sep.IsEmpty()) throw "FractionalTime: no separator specified"; } /// @brief Destructor /// FractionalTime::~FractionalTime () { sep.Clear(); } /// @brief SMPTE text string to milliseconds conversion /// @param _text /// @return /// int FractionalTime::ToMillisecs (wxString _text) { wxString text = _text; wxString re_str = ""; text.Trim(false); text.Trim(true); long h=0,m=0,s=0,f=0; // hour minute second fraction re_str << "(\\d+)" << sep << "(\\d+)" << sep << "(\\d+)" << sep << "(\\d+)"; wxRegEx re(re_str, wxRE_ADVANCED); if (!re.IsValid()) throw "FractionalTime: regex failure"; if (!re.Matches(text)) return 0; // FIXME: throw here too? re.GetMatch(text,1).ToLong(&h); re.GetMatch(text,2).ToLong(&m); re.GetMatch(text,3).ToLong(&s); re.GetMatch(text,4).ToLong(&f); int msecs_f = 0; int fn = 0; // dropframe? do silly things if (drop) { fn += h * frames_per_period * 6; fn += (m % 10) * frames_per_period; if (m > 0) { fn += 1800; m--; fn += m * 1798; // two timestamps dropped per minute after the first fn += s * 30 + f - 2; } else { // minute is evenly divisible by 10, keep first two timestamps fn += s * 30; fn += f; } msecs_f = (fn * num) / den; } // no dropframe, may or may not sync with wallclock time // (see comment in FromMillisecs for an explanation of why it's done like this) else { int fps_approx = floor((double(num)/double(den))+0.5); fn += h * 3600 * fps_approx; fn += m * 60 * fps_approx; fn += s * fps_approx; fn += f; msecs_f = (fn * num) / den; } return msecs_f; } /// @brief SMPTE text string to AssTime conversion /// @param _text /// @return /// AssTime FractionalTime::ToAssTime (wxString _text) { AssTime time; time.SetMS((int)ToMillisecs(_text)); return time; } /// @brief AssTime to SMPTE text string conversion /// @param time /// @return /// wxString FractionalTime::FromAssTime(AssTime time) { return FromMillisecs(time.GetMS()); } /// @brief Milliseconds to SMPTE text string conversion /// @param msec /// wxString FractionalTime::FromMillisecs(int64_t msec) { int h=0, m=0, s=0, f=0; // hours, minutes, seconds, fractions int fn = (msec*(int64_t)num) / (1000*den); // frame number // return 00:00:00:00 if (msec <= 0) goto RETURN; // dropframe? if (drop) { fn += 2 * (fn / (30 * 60)) - 2 * (fn / (30 * 60 * 10)); h = fn / (30 * 60 * 60); m = (fn / (30 * 60)) % 60; s = (fn / 30) % 60; f = fn % 30; } // no dropframe; h/m/s may or may not sync to wallclock time else { /* This is truly the dumbest shit. What we're trying to ensure here is that non-integer framerates are desynced from the wallclock time by a correct amount of time. For example, in the NTSC-without-dropframe case, 3600*num/den would be 107892 (when truncated to int), which is quite a good approximation of how a long an hour is when counted in 30000/1001 frames per second. Unfortunately, that's not what we want, since frame numbers will still range from 00 to 29, meaning that we're really getting _30_ frames per second and not 29.97 and the full hour will be off by almost 4 seconds (108000 frames versus 107892). DEATH TO SMPTE */ int fps_approx = floor((double(num)/double(den))+0.5); int frames_per_h = 3600*fps_approx; int frames_per_m = 60*fps_approx; int frames_per_s = fps_approx; while (fn >= frames_per_h) { h++; fn -= frames_per_h; } while (fn >= frames_per_m) { m++; fn -= frames_per_m; } while (fn >= frames_per_s) { s++; fn -= frames_per_s; } f = fn; } RETURN: return wxString::Format("%02i" + sep + "%02i" + sep + "%02i" + sep + "%02i",h,m,s,f); }