439 lines
10 KiB
C++
439 lines
10 KiB
C++
// Copyright (c) 2005, Rodrigo Braz Monteiro
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are met:
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//
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// * Redistributions of source code must retain the above copyright notice,
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// this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above copyright notice,
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// this list of conditions and the following disclaimer in the documentation
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// and/or other materials provided with the distribution.
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// * Neither the name of the Aegisub Group nor the names of its contributors
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// may be used to endorse or promote products derived from this software
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// without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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// POSSIBILITY OF SUCH DAMAGE.
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//
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// -----------------------------------------------------------------------------
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//
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// AEGISUB
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//
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// Website: http://aegisub.cellosoft.com
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// Contact: mailto:zeratul@cellosoft.com
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//
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////////////
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// Includes
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#include "config.h"
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#include <wx/regex.h>
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#include <math.h>
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#include <fstream>
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#include <algorithm>
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#include "ass_time.h"
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#include "vfr.h"
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#include "utils.h"
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////////////////////// AssTime //////////////////////
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// AssTime constructors
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AssTime::AssTime () {
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time = 0;
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}
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////////////////////
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// Parses from ASS
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// ---------------
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// Note that this function is atomic, it won't touch the values if it's invalid.
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void AssTime::ParseASS (const wxString text) {
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// Prepare
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size_t pos = 0;
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size_t end = 0;
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long th=0,tm=0,tms=0;
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// Count the number of colons
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size_t len = text.Length();
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int colons = 0;
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for (pos=0;pos<len;pos++) if (text[pos] == _T(':')) colons++;
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pos = 0;
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// Set start so that there are only two colons at most
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if (colons > 2) {
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for (pos=0;pos<len;pos++) {
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if (text[pos] == _T(':')) {
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colons--;
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if (colons == 2) break;
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}
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}
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pos++;
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end = pos;
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}
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try {
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// Hours
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if (colons == 2) {
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while (text[end++] != _T(':'));
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th = AegiStringToInt(text,pos,end);
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pos = end;
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}
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// Minutes
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if (colons >= 1) {
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while (text[end++] != _T(':'));
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tm = AegiStringToInt(text,pos,end);
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pos = end;
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}
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// Miliseconds (includes seconds)
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end = text.Length();
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tms = AegiStringToFix(text,3,pos,end);
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}
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// Something went wrong, don't change anything
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catch (...) {
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return;
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}
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// OK, set values
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time = tms + tm*60000 + th*3600000;
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}
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///////////////////
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// Parses from SRT
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void AssTime::ParseSRT (const wxString _text) {
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// Prepare
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wxString text = _text;
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text.Trim(false);
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text.Trim(true);
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long tempv;
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wxString temp;
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int ms,s,m,h;
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// Parse
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temp = text.Mid(0,2);
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temp.ToLong(&tempv);
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h = tempv;
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temp = text.Mid(3,2);
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temp.ToLong(&tempv);
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m = tempv;
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temp = text.Mid(6,2);
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temp.ToLong(&tempv);
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s = tempv;
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temp = text.Mid(9,3);
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temp.ToLong(&tempv);
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ms = tempv;
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// Set value
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time = ms + s*1000 + m*60000 + h*3600000;
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}
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//////////////////////////////////////////
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// AssTime conversion to/from miliseconds
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int AssTime::GetMS () const {
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if (!UseMSPrecision) return time/10*10;
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else return time;
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}
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void AssTime::SetMS (int _ms) {
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time = _ms;
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}
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////////////////
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// ASS Formated
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wxString AssTime::GetASSFormated (bool msPrecision) {
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int h,m,s,ms;
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int _ms = time;
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// Centisecond precision
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msPrecision = msPrecision || UseMSPrecision;
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if (!msPrecision) _ms = _ms/10*10;
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// Reset
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h = m = s = ms = 0;
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if (_ms < 0) _ms = 0;
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// Hours
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while (_ms >= 3600000) {
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_ms -= 3600000;
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h++;
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}
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// Ass overflow
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if (h > 9) {
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h = 9;
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m = 59;
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s = 59;
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ms = 999;
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}
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// Minutes
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while (_ms >= 60000) {
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_ms -= 60000;
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m++;
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}
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// Seconds
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while (_ms >= 1000) {
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_ms -= 1000;
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s++;
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}
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ms = _ms;
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if (msPrecision) return wxString::Format(_T("%01i:%02i:%02i.%03i"),h,m,s,ms);
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else return wxString::Format(_T("%01i:%02i:%02i.%02i"),h,m,s,ms/10);
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}
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////////////////
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// SRT Formated
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wxString AssTime::GetSRTFormated () {
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int h,m,s,ms;
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int _ms = time;
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// Centisecond precision
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if (!UseMSPrecision) _ms = _ms/10*10;
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// Reset
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h = m = s = ms = 0;
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if (_ms < 0) _ms = 0;
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// Hours
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while (_ms >= 3600000) {
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_ms -= 3600000;
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h++;
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}
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// Ass overflow
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if (h > 9) {
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h = 9;
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m = 59;
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s = 59;
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ms = 999;
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}
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// Minutes
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while (_ms >= 60000) {
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_ms -= 60000;
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m++;
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}
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// Seconds
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while (_ms >= 1000) {
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_ms -= 1000;
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s++;
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}
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ms = _ms;
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wxString result = wxString::Format(_T("%02i:%02i:%02i,%03i"),h,m,s,ms);
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return result;
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}
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//////////////////////
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// AssTime comparison
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bool operator < (AssTime &t1, AssTime &t2) {
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return (t1.GetMS() < t2.GetMS());
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}
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bool operator > (AssTime &t1, AssTime &t2) {
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return (t1.GetMS() > t2.GetMS());
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}
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bool operator <= (AssTime &t1, AssTime &t2) {
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return (t1.GetMS() <= t2.GetMS());
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}
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bool operator >= (AssTime &t1, AssTime &t2) {
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return (t1.GetMS() >= t2.GetMS());
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}
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bool operator == (AssTime &t1, AssTime &t2) {
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return (t1.GetMS() == t2.GetMS());
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}
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bool operator != (AssTime &t1, AssTime &t2) {
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return (t1.GetMS() != t2.GetMS());
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}
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/////////////////
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// Static option
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bool AssTime::UseMSPrecision = false;
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///////
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// Get
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int AssTime::GetTimeHours() { return time / 3600000; }
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int AssTime::GetTimeMinutes() { return (time % 3600000)/60000; }
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int AssTime::GetTimeSeconds() { return (time % 60000)/1000; }
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int AssTime::GetTimeMiliseconds() { return (time % 1000); }
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int AssTime::GetTimeCentiseconds() { return (time % 1000)/10; }
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///////
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// Constructor
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FractionalTime::FractionalTime (wxString separator, int numerator, int denominator, bool dropframe) {
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drop = dropframe;
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if (drop) {
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// no dropframe for any other framerates
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num = 30000;
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den = 1001;
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} else {
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num = numerator;
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den = denominator;
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}
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sep = separator;
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// fractions < 1 are not welcome here
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if ((num <= 0 || den <= 0) || (num < den))
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throw _T("FractionalTime: nonsensical enumerator or denominator");
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if (sep.IsEmpty())
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throw _T("FractionalTime: no separator specified");
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}
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///////
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// Destructor
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FractionalTime::~FractionalTime () {
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sep.Clear();
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}
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///////
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// SMPTE text string to milliseconds conversion
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int FractionalTime::ToMillisecs (wxString _text) {
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wxString text = _text;
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wxString re_str = _T("");
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text.Trim(false);
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text.Trim(true);
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long h=0,m=0,s=0,ms=0,f=0;
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// hour minute second fraction
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re_str << _T("(\\d+)") << sep << _T("(\\d+)") << sep << _T("(\\d+)") << sep << _T("(\\d+)");
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wxRegEx re(re_str, wxRE_ADVANCED);
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if (!re.IsValid())
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throw _T("FractionalTime: regex failure");
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if (!re.Matches(text))
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return 0; // FIXME: throw here too?
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re.GetMatch(text,1).ToLong(&h);
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re.GetMatch(text,2).ToLong(&m);
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re.GetMatch(text,3).ToLong(&s);
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re.GetMatch(text,4).ToLong(&f);
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int msecs_f = 0;
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int fn = 0;
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// dropframe? do silly things
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if (drop) {
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fn += h * frames_per_period * 6;
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fn += (m % 10) * frames_per_period;
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if (m > 0) {
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fn += 1800;
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m--;
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fn += m * 1798; // two timestamps dropped per minute after the first
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fn += s * 30 + f - 2;
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}
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else { // minute is evenly divisible by 10, keep first two timestamps
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fn += s * 30;
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fn += f;
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}
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msecs_f = (fn * num) / den;
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}
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// no dropframe, may or may not sync with wallclock time
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// (see comment in FromMillisecs for an explanation of why it's done like this)
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else {
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int fps_approx = floor((double(num)/double(den))+0.5);
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fn += h * 3600 * fps_approx;
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fn += m * 60 * fps_approx;
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fn += s * fps_approx;
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fn += f;
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msecs_f = (fn * num) / den;
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}
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return msecs_f;
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}
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///////
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// SMPTE text string to AssTime conversion
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AssTime FractionalTime::ToAssTime (wxString _text) {
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AssTime time;
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time.SetMS((int)ToMillisecs(_text));
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return time;
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}
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///////
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// AssTime to SMPTE text string conversion
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wxString FractionalTime::FromAssTime(AssTime time) {
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return FromMillisecs(time.GetMS());
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}
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///////
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// Milliseconds to SMPTE text string conversion
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wxString FractionalTime::FromMillisecs(int64_t msec) {
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int h=0, m=0, s=0, f=0; // hours, minutes, seconds, fractions
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int fn = (msec*(int64_t)num) / (1000*den); // frame number
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// dropframe?
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if (drop) {
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fn += 2 * (fn / (30 * 60)) - 2 * (fn / (30 * 60 * 10));
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h = fn / (30 * 60 * 60);
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m = (fn / (30 * 60)) % 60;
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s = (fn / 30) % 60;
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f = fn % 30;
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}
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// no dropframe; h/m/s may or may not sync to wallclock time
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else {
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/*
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This is truly the dumbest shit. What we're trying to ensure here
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is that non-integer framerates are desynced from the wallclock
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time by a correct amount of time. For example, in the
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NTSC-without-dropframe case, 3600*num/den would be 107892
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(when truncated to int), which is quite a good approximation of
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how a long an hour is when counted in 30000/1001 frames per second.
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Unfortunately, that's not what we want, since frame numbers will
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still range from 00 to 29, meaning that we're really getting _30_
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frames per second and not 29.97 and the full hour will be off by
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almost 4 seconds (108000 frames versus 107892).
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DEATH TO SMPTE
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*/
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int fps_approx = floor((double(num)/double(den))+0.5);
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int frames_per_h = 3600*fps_approx;
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int frames_per_m = 60*fps_approx;
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int frames_per_s = fps_approx;
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while (fn >= frames_per_h) {
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h++; fn -= frames_per_h;
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}
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while (fn >= frames_per_m) {
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m++; fn -= frames_per_m;
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}
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while (fn >= frames_per_s) {
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s++; fn -= frames_per_s;
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}
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f = fn;
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}
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return wxString::Format(_T("%02i") + sep + _T("%02i") + sep + _T("%02i") + sep + _T("%02i"),h,m,s,f);
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}
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