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Aegisub/aegisub/src/subtitle_format.cpp
Thomas Goyne acba2c6b63 Rewrite VFR handling in Aegisub. 
Kill vfr.h and vfr.cpp and use the libaegisub versions of them instead.

Rather than the globals VFR_Input and VFR_Output, everything related to
frame rate is now part of the video context. Most things which used to
use VFR_Output now call VideoContext::TimeAtFrame etc.; video providers,
rather than modifying VFR_Input directly, now have getters for their
frame rates which VideoContext calls. Read-only public access to
VFR_Input and VFR_Output are still provided (hopefully temporarily) for
a few things which were awkward to do through VideoContext.

The Avisynth provider now might correctly handle VFR MKVs which can be
opened with DirectShowSource but not DSS2.

Rework keyframe handling as well, so that it continues to match the vfr
handling in design and implementation.

Originally committed to SVN as r4662.
2010-07-08 04:29:04 +00:00

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// 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.cpp
/// @brief Base class for subtitle format handlers
/// @ingroup subtitle_io
///
#include "config.h"
#ifndef AGI_PRE
#include <wx/intl.h>
#include <wx/choicdlg.h> // Keep this last so wxUSE_CHOICEDLG is set.
#endif
#include "ass_file.h"
#include "subtitle_format.h"
#include "subtitle_format_ass.h"
#include "subtitle_format_dvd.h"
#include "subtitle_format_encore.h"
#include "subtitle_format_microdvd.h"
#include "subtitle_format_mkv.h"
#include "subtitle_format_srt.h"
#include "subtitle_format_transtation.h"
#include "subtitle_format_ttxt.h"
#include "subtitle_format_txt.h"
#include "video_context.h"
/// @brief Constructor
///
SubtitleFormat::SubtitleFormat() {
Line = NULL;
Register();
isCopy = false;
}
/// @brief Destructor
///
SubtitleFormat::~SubtitleFormat () {
Remove();
}
/// DOCME
std::list<SubtitleFormat*> SubtitleFormat::formats;
/// DOCME
bool SubtitleFormat::loaded = false;
/// @brief Set target
/// @param file
///
void SubtitleFormat::SetTarget(AssFile *file) {
ClearCopy();
if (!file) Line = NULL;
else Line = &file->Line;
assFile = file;
}
/// @brief Create copy
///
void SubtitleFormat::CreateCopy() {
SetTarget(new AssFile(*assFile));
isCopy = true;
}
/// @brief Clear copy
///
void SubtitleFormat::ClearCopy() {
if (isCopy) {
delete assFile;
assFile = NULL;
isCopy = false;
}
}
/// @brief Clear subtitles
///
void SubtitleFormat::Clear() {
assFile->Clear();
}
/// @brief Load default
/// @param defline
///
void SubtitleFormat::LoadDefault(bool defline) {
assFile->LoadDefault(defline);
}
/// @brief Add line
/// @param data
/// @param group
/// @param version
/// @param outgroup
void SubtitleFormat::AddLine(wxString data,wxString group,int &version,wxString *outgroup) {
assFile->AddLine(data,group,version,outgroup);
}
/// @brief Add formats
///
void SubtitleFormat::LoadFormats () {
if (!loaded) {
new ASSSubtitleFormat();
new SRTSubtitleFormat();
new TXTSubtitleFormat();
new TTXTSubtitleFormat();
new MicroDVDSubtitleFormat();
new MKVSubtitleFormat();
new EncoreSubtitleFormat();
new TranStationSubtitleFormat();
#ifdef _DEBUG
new DVDSubtitleFormat();
#endif
}
loaded = true;
}
/// @brief Destroy formats
///
void SubtitleFormat::DestroyFormats () {
std::list<SubtitleFormat*>::iterator cur;
for (cur=formats.begin();cur!=formats.end();cur = formats.begin()) {
delete *cur;
}
formats.clear();
}
/// @brief Get an appropriate reader
/// @param filename
/// @return
///
SubtitleFormat *SubtitleFormat::GetReader(wxString filename) {
LoadFormats();
std::list<SubtitleFormat*>::iterator cur;
SubtitleFormat *reader;
for (cur=formats.begin();cur!=formats.end();cur++) {
reader = *cur;
if (reader->CanReadFile(filename)) return reader;
}
return NULL;
}
/// @brief Get an appropriate writer
/// @param filename
/// @return
///
SubtitleFormat *SubtitleFormat::GetWriter(wxString filename) {
LoadFormats();
std::list<SubtitleFormat*>::iterator cur;
SubtitleFormat *writer;
for (cur=formats.begin();cur!=formats.end();cur++) {
writer = *cur;
if (writer->CanWriteFile(filename)) return writer;
}
return NULL;
}
/// @brief Register
/// @return
///
void SubtitleFormat::Register() {
std::list<SubtitleFormat*>::iterator cur;
for (cur=formats.begin();cur!=formats.end();cur++) {
if (*cur == this) return;
}
formats.push_back(this);
}
/// @brief Remove
/// @return
///
void SubtitleFormat::Remove() {
std::list<SubtitleFormat*>::iterator cur;
for (cur=formats.begin();cur!=formats.end();cur++) {
if (*cur == this) {
formats.erase(cur);
return;
}
}
}
/// @brief Get read wildcards
/// @return
///
wxArrayString SubtitleFormat::GetReadWildcards() {
return wxArrayString();
}
/// @brief Get write wildcards
/// @return
///
wxArrayString SubtitleFormat::GetWriteWildcards() {
return wxArrayString();
}
/// @brief Get wildcard list
/// @param mode
/// @return
///
wxString SubtitleFormat::GetWildcards(int mode) {
// Ensure it's loaded
LoadFormats();
// Variables
wxArrayString all;
wxArrayString cur;
wxString wild;
wxString final;
wxString temp1;
wxString temp2;
// For each format
std::list<SubtitleFormat*>::iterator curIter;
SubtitleFormat *format;
for (curIter=formats.begin();curIter!=formats.end();curIter++) {
// Get list
format = *curIter;
if (mode == 0) cur = format->GetReadWildcards();
else if (mode == 1) cur = format->GetWriteWildcards();
temp1.Clear();
temp2.Clear();
// Has wildcards
if (cur.Count()) {
// Process entries
for (unsigned int i=0;i<cur.Count();i++) {
wild = _T("*.") + cur[i];
all.Add(wild);
temp1 += wild + _T(",");
temp2 += wild + _T(";");
}
// Assemble final name
final += format->GetName() + _T(" (") + temp1.Left(temp1.Length()-1) + _T(")|") + temp2.Left(temp2.Length()-1) + _T("|");
}
}
// Add "all formats" list
temp1.Clear();
temp2.Clear();
for (unsigned int i=0;i<all.Count();i++) {
temp1 += all[i] + _T(",");
temp2 += all[i] + _T(";");
}
final = wxString(_("All Supported Formats")) + _T(" (") + temp1.Left(temp1.Length()-1) + _T(")|") + temp2.Left(temp2.Length()-1) + _T("|") + final.Left(final.Length()-1);
// Return final list
return final;
}
/// @brief Ask the user to enter the FPS
/// @param showSMPTE
/// @return
///
SubtitleFormat::FPSRational SubtitleFormat::AskForFPS(bool showSMPTE) {
wxArrayString choices;
FPSRational fps_rat;
fps_rat.smpte_dropframe = false; // ensure it's false by default
// Video FPS
VideoContext *context = VideoContext::Get();
bool vidLoaded = context->TimecodesLoaded();
if (vidLoaded) {
wxString vidFPS;
if (context->FPS().IsVFR()) vidFPS = _T("VFR");
else vidFPS = wxString::Format(_T("%.3f"),context->FPS().FPS());
choices.Add(wxString::Format(_T("From video (%s)"),vidFPS.c_str()));
}
// Standard FPS values
choices.Add(_("15.000 FPS"));
choices.Add(_("23.976 FPS (Decimated NTSC)"));
choices.Add(_("24.000 FPS (FILM)"));
choices.Add(_("25.000 FPS (PAL)"));
choices.Add(_("29.970 FPS (NTSC)"));
if (showSMPTE)
choices.Add(_("29.970 FPS (NTSC with SMPTE dropframe)"));
choices.Add(_("30.000 FPS"));
choices.Add(_("50.000 FPS (PAL x2)"));
choices.Add(_("59.940 FPS (NTSC x2)"));
choices.Add(_("60.000 FPS"));
choices.Add(_("119.880 FPS (NTSC x4)"));
choices.Add(_("120.000 FPS"));
// Ask
int choice = wxGetSingleChoiceIndex(_("Please choose the appropriate FPS for the subtitles:"),_("FPS"),choices);
if (choice == -1) {
fps_rat.num = 0;
fps_rat.den = 0;
return fps_rat;
}
// Get FPS from choice
if (vidLoaded) choice--;
// dropframe was displayed, that means all choices >4 are bumped up by 1
if (showSMPTE) {
switch (choice) {
case -1: fps_rat.num = -1; fps_rat.den = 1; break; // VIDEO
case 0: fps_rat.num = 15; fps_rat.den = 1; break;
case 1: fps_rat.num = 24000; fps_rat.den = 1001; break;
case 2: fps_rat.num = 24; fps_rat.den = 1; break;
case 3: fps_rat.num = 25; fps_rat.den = 1; break;
case 4: fps_rat.num = 30000; fps_rat.den = 1001; break;
case 5: fps_rat.num = 30000; fps_rat.den = 1001; fps_rat.smpte_dropframe = true; break;
case 6: fps_rat.num = 30; fps_rat.den = 1; break;
case 7: fps_rat.num = 50; fps_rat.den = 1; break;
case 8: fps_rat.num = 60000; fps_rat.den = 1001; break;
case 9: fps_rat.num = 60; fps_rat.den = 1; break;
case 10: fps_rat.num = 120000; fps_rat.den = 1001; break;
case 11: fps_rat.num = 120; fps_rat.den = 1; break;
}
return fps_rat;
} else {
// dropframe wasn't displayed
switch (choice) {
case -1: fps_rat.num = -1; fps_rat.den = 1; break; // VIDEO
case 0: fps_rat.num = 15; fps_rat.den = 1; break;
case 1: fps_rat.num = 24000; fps_rat.den = 1001; break;
case 2: fps_rat.num = 24; fps_rat.den = 1; break;
case 3: fps_rat.num = 25; fps_rat.den = 1; break;
case 4: fps_rat.num = 30000; fps_rat.den = 1001; break;
case 5: fps_rat.num = 30; fps_rat.den = 1; break;
case 6: fps_rat.num = 50; fps_rat.den = 1; break;
case 7: fps_rat.num = 60000; fps_rat.den = 1001; break;
case 8: fps_rat.num = 60; fps_rat.den = 1; break;
case 9: fps_rat.num = 120000; fps_rat.den = 1001; break;
case 10: fps_rat.num = 120; fps_rat.den = 1; break;
}
return fps_rat;
}
// fubar
fps_rat.num = 0;
fps_rat.den = 0;
return fps_rat;
}
/// @brief Sort lines
///
void SubtitleFormat::SortLines() {
AssFile::Sort(*Line);
}
/// @brief Convert tags
/// @param format
/// @param lineEnd
///
void SubtitleFormat::ConvertTags(int format,const wxString &lineEnd,bool mergeLineBreaks) {
using std::list;
list<AssEntry*>::iterator next;
for (list<AssEntry*>::iterator cur=Line->begin();cur!=Line->end();cur++) {
AssDialogue *current = dynamic_cast<AssDialogue*>(*cur);
if (current) {
// Strip tags
if (format == 1) current->StripTags();
else if (format == 2) current->ConvertTagsToSRT();
// Replace line breaks
current->Text.Replace(_T("\\h"),_T(" "),true);
current->Text.Replace(_T("\\n"),lineEnd,true);
current->Text.Replace(_T("\\N"),lineEnd,true);
if (mergeLineBreaks) {
while (current->Text.Replace(lineEnd+lineEnd,lineEnd,true)) {};
}
}
}
}
/// @brief Remove all comment lines
///
void SubtitleFormat::StripComments() {
using std::list;
list<AssEntry*>::iterator next;
for (list<AssEntry*>::iterator cur = Line->begin(); cur != Line->end(); cur = next) {
next = cur;
next++;
AssDialogue *dlg = dynamic_cast<AssDialogue*>(*cur);
if (dlg && (dlg->Comment || dlg->Text.IsEmpty())) {
delete *cur;
Line->erase(cur);
}
}
}
/// @brief Remove all non-dialogue lines
///
void SubtitleFormat::StripNonDialogue() {
using std::list;
list<AssEntry*>::iterator next;
for (list<AssEntry*>::iterator cur = Line->begin(); cur != Line->end(); cur = next) {
next = cur;
next++;
if (!dynamic_cast<AssDialogue*>(*cur)) {
delete *cur;
Line->erase(cur);
}
}
}
/// @brief Helper function for RecombineOverlaps()
/// @param list
/// @param next
/// @param newdlg
///
static void InsertLineSortedIntoList(std::list<AssEntry*> &list, std::list<AssEntry*>::iterator next, AssDialogue *newdlg) {
std::list<AssEntry*>::iterator insertpos = next;
bool inserted = false;
while (insertpos != list.end()) {
AssDialogue *candidate = dynamic_cast<AssDialogue*>(*insertpos);
if (candidate && candidate->Start >= newdlg->Start) {
list.insert(insertpos, newdlg);
inserted = true;
break;
}
insertpos++;
}
if (!inserted) {
list.push_back(newdlg);
}
}
/// @brief Split and merge lines so there are no overlapping lines
///
/// Algorithm described at http://devel.aegisub.org/wiki/Technical/SplitMerge
void SubtitleFormat::RecombineOverlaps() {
using std::list;
list<AssEntry*>::iterator next;
for (list<AssEntry*>::iterator cur = Line->begin(); cur != Line->end(); cur = next) {
next = cur;
next++;
if (next == Line->end()) break;
AssDialogue *prevdlg = dynamic_cast<AssDialogue*>(*cur);
AssDialogue *curdlg = dynamic_cast<AssDialogue*>(*next);
if (curdlg && prevdlg && prevdlg->End > curdlg->Start) {
// Use names like in the algorithm description and prepare for erasing
// old dialogues from the list
list<AssEntry*>::iterator prev = cur;
cur = next;
next++;
// std::list::insert() inserts items before the given iterator, so
// we need 'next' for inserting. 'prev' and 'cur' can safely be erased
// from the list now.
Line->erase(prev);
Line->erase(cur);
//Is there an A part before the overlap?
if (curdlg->Start > prevdlg->Start) {
// Produce new entry with correct values
AssDialogue *newdlg = dynamic_cast<AssDialogue*>(prevdlg->Clone());
newdlg->Start = prevdlg->Start;
newdlg->End = curdlg->Start;
newdlg->Text = prevdlg->Text;
InsertLineSortedIntoList(*Line, next, newdlg);
}
// Overlapping A+B part
{
AssDialogue *newdlg = dynamic_cast<AssDialogue*>(prevdlg->Clone());
newdlg->Start = curdlg->Start;
newdlg->End = (prevdlg->End < curdlg->End) ? prevdlg->End : curdlg->End;
// Put an ASS format hard linewrap between lines
newdlg->Text = curdlg->Text + _T("\\N") + prevdlg->Text;
InsertLineSortedIntoList(*Line, next, newdlg);
}
// Is there an A part after the overlap?
if (prevdlg->End > curdlg->End) {
// Produce new entry with correct values
AssDialogue *newdlg = dynamic_cast<AssDialogue*>(prevdlg->Clone());
newdlg->Start = curdlg->End;
newdlg->End = prevdlg->End;
newdlg->Text = prevdlg->Text;
InsertLineSortedIntoList(*Line, next, newdlg);
}
// Is there a B part after the overlap?
if (curdlg->End > prevdlg->End) {
// Produce new entry with correct values
AssDialogue *newdlg = dynamic_cast<AssDialogue*>(prevdlg->Clone());
newdlg->Start = prevdlg->End;
newdlg->End = curdlg->End;
newdlg->Text = curdlg->Text;
InsertLineSortedIntoList(*Line, next, newdlg);
}
next--;
}
}
}
/// @brief Merge identical lines that follow each other
///
void SubtitleFormat::MergeIdentical() {
using std::list;
list<AssEntry*>::iterator next;
for (list<AssEntry*>::iterator cur = Line->begin(); cur != Line->end(); cur = next) {
next = cur;
next++;
if (next == Line->end()) break;
AssDialogue *curdlg = dynamic_cast<AssDialogue*>(*cur);
AssDialogue *nextdlg = dynamic_cast<AssDialogue*>(*next);
if (curdlg && nextdlg && curdlg->End == nextdlg->Start && curdlg->Text == nextdlg->Text) {
// Merge timing
nextdlg->Start = (nextdlg->Start < curdlg->Start ? nextdlg->Start : curdlg->Start);
nextdlg->End = (nextdlg->End > curdlg->End ? nextdlg->End : curdlg->End);
// Remove duplicate line
delete *cur;
Line->erase(cur);
}
}
}
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