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// Copyright (c) 2005-2006, Rodrigo Braz Monteiro, Fredrik Mellbin
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// All rights reserved.
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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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// * 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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// 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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// Website: http://aegisub.cellosoft.com
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// Contact: mailto:zeratul@cellosoft.com
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#include <wx/filename.h>
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#include "text_file_reader.h"
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#include "text_file_writer.h"
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void FrameRate::Clear () {
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void FrameRate::AddFrame(int ms) {
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void FrameRate::CalcAverage() {
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if (Frame.size() <= 1)
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throw _("No timecodes to average");
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AverageFrameRate = double(Frame.back()) / (Frame.size()-1);
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//////////////////////// FrameRate //////////////////////
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FrameRate::FrameRate() {
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FrameRate::~FrameRate() {
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void FrameRate::Load(wxString filename) {
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// Check if file exists
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wxFileName filetest(filename);
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if (!filetest.FileExists()) throw _T("File not found.");
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TextFileReader file(filename);
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curLine = file.ReadLineFromFile();
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wxString header = curLine;
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bool first = (header.Left(7).Lower() == _T("assume "));
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// V1, code converted from avcvfr9
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if (header == _T("# timecode format v1") || first) {
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// Locate the default fps line
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if (!first) curLine = file.ReadLineFromFile();
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// Skip empty lines and comments
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if (curLine == _T("") || curLine.Left(1) == _T("#")) continue;
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else if (curLine.Left(7).Lower() != _T("assume ")) throw _T("Encountered data before 'Assume <fps>' line");
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if (!curLine.Mid(6).ToDouble(&AverageFrameRate) || AverageFrameRate <= 0) throw _T("Invalid 'Assume <fps>' line");
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} while (file.HasMoreLines());
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// Read and expand all timecodes to v2
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double currenttime = 0;
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while (file.HasMoreLines()) {
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curLine = file.ReadLineFromFile();
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// Skip empty lines and comments
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if (curLine == _T("") || curLine.Left(1) == _T("#"))
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wxString tmp = curLine.AfterFirst(_T(','));
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wxString temp = curLine.BeforeFirst(_T(','));
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if (!temp.ToLong(&lstart) || lstart < 0)
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throw _T("Timecode parsing error, invalid start format found");
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temp = tmp.BeforeLast(_T(','));
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if (!temp.ToLong(&lend) || lend < 0)
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throw _T("Timecode parsing error, invalid end format found");
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temp = tmp.AfterLast(_T(','));
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if (!temp.ToDouble(&lfps) || lfps <= 0)
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throw _T("Timecode parsing error, invalid fps format found");
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if (lstart <= lposition)
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throw _T("Timecode parsing error, out of order or overlapping timecode range found");
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for (int i = 0; i <= lstart - lposition - 2; i++)
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AddFrame((int)(floor(currenttime+(i*1000) / AverageFrameRate)));
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currenttime += ((lstart - lposition - 1)*1000) / AverageFrameRate;
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for (int i = 0; i <= lend - lstart; i++)
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AddFrame((int)(floor(currenttime+(i*1000) / lfps)));
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currenttime += ((lend - lstart + 1)*1000) / lfps;
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AddFrame(currenttime);
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last_time = currenttime;
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last_frame = (int)Frame.size() - 1;
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else if (header == _T("# timecode format v2")) {
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// Assigns new VFR file
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while (file.HasMoreLines()) {
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curLine = file.ReadLineFromFile();
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//skip empty lines and comments
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if (curLine == _T("") || curLine.Left(1) == _T("#"))
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wxString tmp = curLine.BeforeFirst(_T('.'));
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if (lftime >= cftime)
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throw _T("Out of order/too close timecodes found");
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last_frame = (int)Frame.size() - 1;
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throw _T("Unknown time code file format.");
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Options.AddToRecentList(filename,_T("Recent timecodes"));
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void FrameRate::Save(wxString filename) {
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TextFileWriter file(filename,_T("ASCII"));
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file.WriteLineToFile(_T("# timecode format v2"));
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for (size_t i=0;i<Frame.size();i++) {
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file.WriteLineToFile(wxString::Format(_T("%f"),(float)Frame[i]));
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void FrameRate::Unload () {
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FrameRateType = NONE;
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AverageFrameRate = 0;
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void FrameRate::SetCFR(double fps) {
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AverageFrameRate = fps;
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void FrameRate::SetVFR(std::vector<int> newTimes) {
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last_time = newTimes.back();
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last_frame = (int)newTimes.size();
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/////////////////////////////
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// Gets frame number at time
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int FrameRate::PFrameAtTime(int ms,bool useceil) {
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// Check if it's loaded
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if (!loaded) return -1;
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// Normalize miliseconds
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// Get for constant frame rate
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if (FrameRateType == CFR || Frame.size() == 0) {
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double value = double(ms) * AverageFrameRate / 1000.0;
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if (useceil) return (int)ceil(value);
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else return (int)floor(value);
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// Get for variable frame rate
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else if (FrameRateType == VFR) {
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//if (useceil) trueLast = ceil(last_time);
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//else trueLast = floor(last_time);
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trueLast = Frame[Frame.size()-1];
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if (ms <= trueLast) {
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// Prepare binary search
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size_t end = last_frame;
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while (start <= end) {
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// Current frame being checked
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cur = (start+end)>>1;
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// Is it larger or equal to searched time?
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largerEqual = Frame[cur] >= ms;
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// If it is, is the previous smaller?
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// If so, this is the frame we're looking for
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if (largerEqual && (cur == 0 || Frame[cur-1] < ms)) {
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if (useceil) return (int)cur;
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// Not found, continue search
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if (largerEqual) end = cur-1;
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if (useceil) return (int)(last_frame + ceil((ms-last_time) * AverageFrameRate / 1000));
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else return (int)(last_frame + floor((ms-last_time) * AverageFrameRate / 1000));
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//////////////////////
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// Gets time at frame
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int FrameRate::PTimeAtFrame(int frame) {
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if (!loaded) return -1;
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// For negative/zero times, fallback to zero
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if (frame <= 0) return 0;
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// Constant frame rate
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if (FrameRateType == CFR || Frame.size() == 0) {
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return (int)floor(double(frame) / AverageFrameRate * 1000.0);
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// Variable frame rate
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else if (FrameRateType == VFR) {
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// Is it inside frame rate range? If so, just get the value from timecodes table
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if (frame < (signed) Frame.size()) return Frame.at(frame);
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// Otherwise, calculate it
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else return (int)floor(Frame.back() + double(frame-Frame.size()+1) / AverageFrameRate * 1000.0);
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// Unknown frame rate type
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/////////////////////////////
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// Get correct frame at time
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// returns the adjusted time for end frames when start=false
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// otherwise for start frames
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int FrameRate::GetFrameAtTime(int ms,bool start) {
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return PFrameAtTime(ms,start);
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/////////////////////////////
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// Get correct time at frame
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// compensates and returns an end time when start=false
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int FrameRate::GetTimeAtFrame(int frame,bool start,bool exact) {
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// Exact, for display
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finalTime = PTimeAtFrame(frame);
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// Adjusted, for subs sync
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finalTime = (PTimeAtFrame(frame-1) + PTimeAtFrame(frame))/2;
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//if (FrameRateType == VFR) finalTime = PTimeAtFrame(frame);
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//else finalTime = (PTimeAtFrame(frame) + PTimeAtFrame(frame+1))/2;
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finalTime = (PTimeAtFrame(frame) + PTimeAtFrame(frame+1))/2;
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////////////////////////////////////////
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// Get the current list of frames/times
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std::vector<int> FrameRate::GetFrameTimeList() {
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///////////////////////////////////////////
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// Calculate the common FPS for evil stuff
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// e.g., in a mix of 24fps and 30fps, returns 120fps
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double FrameRate::GetCommonFPS() {
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int sectionStart = 0;
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// List of likely frame rates
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std::vector<double> frameRates;
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frameRates.push_back(15.0 / 1.001);
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frameRates.push_back(15);
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frameRates.push_back(24.0 / 1.001);
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frameRates.push_back(24);
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frameRates.push_back(30.0 / 1.001);
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frameRates.push_back(30);
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frameRates.push_back(120.0 / 1.001);
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frameRates.push_back(120);
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// List of rates found
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std::vector<double> found;
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// Find the relative fps of each area
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for (unsigned int i=1;i<Frame.size();i++) {
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// Find the current frame distance
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curDist = Frame[i]-Frame[i-1];
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// See if it's close enough to the last
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if ((abs(curDist - lastDist) < 2 || i-1 == (unsigned) sectionStart) && i != Frame.size()-1) {
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// Calculate section fps
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curFps = (i - sectionStart - 1) * 1000.0 / double(Frame[i-1]-Frame[sectionStart]);
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// See if it's close enough to one of the likely rates
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for (unsigned int j=0;j<frameRates.size();j++) {
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if (curFps-0.01 <= frameRates[j] && curFps+0.01 >= frameRates[j]) {
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curFps = frameRates[j];
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// See if it's on list
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for (unsigned int j=0;j<found.size();j++) {
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if (found[j] == curFps) {
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if (!onList) found.push_back(curFps);
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// Find common between them
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double v1,v2,minInt,tempd;
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while (found.size() > 1) {
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// Extract last two values
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// Find what it takes to make it an integer
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for (minInt = 1;minInt<20;minInt++) {
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tempi1 = (int)(tempd-0.001);
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tempi2 = (int)(tempd+0.001);
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if (tempi1 != tempi2) break;
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if (minInt != 20) v1 = v1*minInt;
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// See if it's close enough to one of the likely rates
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for (unsigned int j=0;j<frameRates.size();j++) {
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if (v1-0.01 <= frameRates[j] && v1+0.01 >= frameRates[j]) {
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// Re-insert obtained result
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FrameRate VFR_Output;
added
removed
src/vfr.cpp
