Aegisub/aegisub/src/subtitle_format_microdvd.cpp
Thomas Goyne 71776940f6 Rewrite SMPTE timecode handling
Move SMPTE handling to agi::vfr::Framerate to get all of the interesting
logic dealing with timcodes in one place, and to make it testable.

Completely rewrite the SMPTE time conversions as testing them reveals
that they were incorrect in some cases.

Originally committed to SVN as r6631.
2012-03-29 19:04:36 +00:00

155 lines
4.8 KiB
C++

// Copyright (c) 2006, 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 subtitle_format_microdvd.cpp
/// @brief Reading/writing MicroDVD subtitle format (.SUB)
/// @ingroup subtitle_io
///
#include "config.h"
#include "subtitle_format_microdvd.h"
#ifndef AGI_PRE
#include <wx/regex.h>
#endif
#include "ass_dialogue.h"
#include "ass_file.h"
#include "ass_time.h"
#include "text_file_reader.h"
#include "text_file_writer.h"
#include "video_context.h"
MicroDVDSubtitleFormat::MicroDVDSubtitleFormat()
: SubtitleFormat("MicroDVD")
{
}
wxArrayString MicroDVDSubtitleFormat::GetReadWildcards() const {
wxArrayString formats;
formats.Add("sub");
return formats;
}
wxArrayString MicroDVDSubtitleFormat::GetWriteWildcards() const {
return GetReadWildcards();
}
bool MicroDVDSubtitleFormat::CanReadFile(wxString const& filename) const {
// Return false immediately if extension is wrong
if (filename.Right(4).Lower() != ".sub") return false;
// Since there is an infinity of .sub formats, load first line and check if it's valid
TextFileReader file(filename);
if (file.HasMoreLines()) {
wxRegEx exp("^[\\{\\[]([0-9]+)[\\}\\]][\\{\\[]([0-9]+)[\\}\\]](.*)$", wxRE_ADVANCED);
return exp.Matches(file.ReadLineFromFile());
}
return false;
}
void MicroDVDSubtitleFormat::ReadFile(AssFile *target, wxString const& filename, wxString const& encoding) const {
TextFileReader file(filename, encoding);
wxRegEx exp("^[\\{\\[]([0-9]+)[\\}\\]][\\{\\[]([0-9]+)[\\}\\]](.*)$", wxRE_ADVANCED);
target->LoadDefault(false);
agi::vfr::Framerate fps;
bool isFirst = true;
while (file.HasMoreLines()) {
wxString line = file.ReadLineFromFile();
if (exp.Matches(line)) {
long f1, f2;
exp.GetMatch(line, 1).ToLong(&f1);
exp.GetMatch(line, 2).ToLong(&f2);
wxString text = exp.GetMatch(line, 3);
// If it's the first, check if it contains fps information
if (isFirst) {
isFirst = false;
if (f1 == 1 && f2 == 1) {
// Convert fps
double cfr;
if (text.ToDouble(&cfr)) {
fps = cfr;
continue;
}
}
// If it wasn't an fps line, ask the user for it
fps = AskForFPS(true, false);
if (!fps.IsLoaded()) return;
}
text.Replace("|", "\\N");
AssDialogue *diag = new AssDialogue;
diag->Start = fps.TimeAtFrame(f1, agi::vfr::START);
diag->End = fps.TimeAtFrame(f2, agi::vfr::END);
diag->Text = text;
target->Line.push_back(diag);
}
}
}
void MicroDVDSubtitleFormat::WriteFile(const AssFile *src, wxString const& filename, wxString const& encoding) const {
agi::vfr::Framerate fps = AskForFPS(true, false);
if (!fps.IsLoaded()) return;
AssFile copy(*src);
copy.Sort();
StripComments(copy.Line);
RecombineOverlaps(copy.Line);
MergeIdentical(copy.Line);
StripTags(copy.Line);
ConvertNewlines(copy.Line, "|");
TextFileWriter file(filename, encoding);
// Write FPS line
if (!fps.IsVFR()) {
file.WriteLineToFile(wxString::Format("{1}{1}%.6f", fps.FPS()));
}
// Write lines
for (LineList::const_iterator cur = copy.Line.begin(); cur != copy.Line.end(); ++cur) {
if (AssDialogue *current = dynamic_cast<AssDialogue*>(*cur)) {
int start = fps.FrameAtTime(current->Start, agi::vfr::START);
int end = fps.FrameAtTime(current->End, agi::vfr::END);
file.WriteLineToFile(wxString::Format("{%i}{%i}%s", start, end, current->Text));
}
}
}