Aegisub/aegisub/src/keyframe.cpp

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// Copyright (c) 2007, Alysson Souza e Silva
// 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 keyframe.cpp
/// @brief Read and store video keyframe data
/// @ingroup video_input
///
///////////
// Headers
#include "config.h"
#ifndef AGI_PRE
#include <wx/msgdlg.h>
#endif
#include "keyframe.h"
#include "options.h"
#include "text_file_reader.h"
#include "text_file_writer.h"
#include "vfr.h"
#include "video_context.h"
/// @brief Load Keyframes
/// @param filename
///
void KeyFrameFile::Load(wxString filename) {
// Load
try {
// Open file
wxArrayInt keyFrames;
keyFrames.Empty();
TextFileReader file(filename,_T("ASCII"));
wxString cur = file.ReadLineFromFile();
// Detect type (Only Xvid, DivX, x264 and Aegisub's keyframe files are currently supported)
if (cur == _T("# keyframe format v1")) { OpenAegiKeyFrames(file, keyFrames); }
else if (cur.StartsWith(_T("# XviD 2pass stat file"))) { OpenXviDKeyFrames(file, keyFrames); }
else if (cur.StartsWith(_T("##map version"))) { OpenDivXKeyFrames(file, keyFrames); }
else if (cur.StartsWith(_T("#options:"))) { Openx264KeyFrames(file, keyFrames); }
else { throw(_T("Invalid or unsupported keyframes file.")); }
// Set keyframes
VideoContext::Get()->SetOverKeyFrames(keyFrames);
VideoContext::Get()->SetKeyFramesName(filename);
// Add to recent
Options.AddToRecentList(filename,_T("Recent keyframes"));
}
// Fail
catch (const wchar_t *error) {
wxString err(error);
wxMessageBox(err, _T("Error opening keyframes file"), wxOK | wxICON_ERROR, NULL);
}
catch (...) {
wxMessageBox(_T("Unknown error"), _T("Error opening keyframes file"), wxOK | wxICON_ERROR, NULL);
}
}
/// @brief Save Keyframes
/// @param filename
///
void KeyFrameFile::Save(wxString filename) {
// Get keyframes
wxArrayInt keyFrames = VideoContext::Get()->GetKeyFrames();
// Write header
TextFileWriter file(filename,_T("ASCII"));
file.WriteLineToFile(_T("# keyframe format v1"));
file.WriteLineToFile(wxString::Format(_T("fps %f"),VideoContext::Get()->GetFPS()));
// Write keyframes
for (unsigned int i=0;i<keyFrames.Count();i++) {
file.WriteLineToFile(wxString::Format(_T("%i"),keyFrames[i]));
}
// Add to recent
Options.AddToRecentList(filename,_T("Recent keyframes"));
}
/// @brief Aegisub keyframes file
/// @param file
/// @param keyFrames
///
void KeyFrameFile::OpenAegiKeyFrames(TextFileReader& file, wxArrayInt& keyFrames)
{
double fps;
wxString cur = file.ReadLineFromFile();
// Read header
if (cur.Left(4) != _T("fps ")) throw _T("Invalid keyframes file, missing FPS.");
cur = cur.Mid(4);
cur.ToDouble(&fps);
if (fps == 0.0) throw _T("Invalid FPS.");
// Set FPS
if (!VideoContext::Get()->IsLoaded()) {
VideoContext::Get()->SetFPS(fps);
VFR_Input.SetCFR(fps);
if (!VFR_Output.IsLoaded()) VFR_Output.SetCFR(fps);
}
// Read lines
while (file.HasMoreLines()) {
cur = file.ReadLineFromFile();
if (!cur.IsEmpty() && !cur.StartsWith(_T("#")) && cur.IsNumber()) {
long temp;
cur.ToLong(&temp);
keyFrames.Add(temp);
}
}
}
/// @brief XviD stats file
/// @param file
/// @param keyFrames
///
void KeyFrameFile::OpenXviDKeyFrames(TextFileReader& file, wxArrayInt& keyFrames)
{
wxString cur = file.ReadLineFromFile();
unsigned int count = 0;
// Read lines
while (file.HasMoreLines()) {
if (cur.StartsWith(_T("i"))) {
keyFrames.Add(count);
count++;
}
else if (cur.StartsWith(_T("p")) || cur.StartsWith(_T("b"))) {
count++;
}
cur = file.ReadLineFromFile();
}
}
/// @brief DivX stats file
/// @param file
/// @param keyFrames
///
void KeyFrameFile::OpenDivXKeyFrames(TextFileReader& file, wxArrayInt& keyFrames)
{
wxString cur = file.ReadLineFromFile();
unsigned int count = 0;
// Read lines
while (file.HasMoreLines())
{
if (cur.Contains(_T("I"))) {
keyFrames.Add(count);
count++;
}
else if (cur.Contains(_T("P")) || cur.Contains(_T("B"))) {
count++;
}
cur = file.ReadLineFromFile();
}
}
/// @brief x264 stats file
/// @param file
/// @param keyFrames
///
void KeyFrameFile::Openx264KeyFrames(TextFileReader& file, wxArrayInt& keyFrames)
{
wxString cur = file.ReadLineFromFile();
unsigned int count = 0;
size_t pos;
// Read lines
while (file.HasMoreLines())
{
pos = cur.Find(_T("type:"));
if (cur.Mid(pos,6).Right(1).Lower() == (_T("i"))) {
keyFrames.Add(count);
count++;
}
else if (cur.Mid(pos,6).Right(1).Lower() == (_T("p")) || cur.Mid(pos,6).Right(1).Lower() == (_T("b"))) {
count++;
}
cur = file.ReadLineFromFile();
}
}