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Aegisub/aegisub/mkv_wrap.cpp

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// Copyright (c) 2004-2006, Rodrigo Braz Monteiro, Mike Matsnev
// 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
//
// Website: http://aegisub.cellosoft.com
// Contact: mailto:zeratul@cellosoft.com
//
///////////
// Headers
#include <algorithm>
#include <errno.h>
#include <stdint.h>
#include <wx/tokenzr.h>
#include <wx/choicdlg.h>
#include <wx/filename.h>
#include "mkv_wrap.h"
#include "dialog_progress.h"
#include "ass_file.h"
#include "ass_time.h"
////////////
// Instance
MatroskaWrapper MatroskaWrapper::wrapper;
///////////
// Defines
#define CACHESIZE 65536
///////////////
// Constructor
MatroskaWrapper::MatroskaWrapper() {
file = NULL;
}
//////////////
// Destructor
MatroskaWrapper::~MatroskaWrapper() {
Close();
}
/////////////
// Open file
void MatroskaWrapper::Open(wxString filename,bool parse) {
// Make sure it's closed first
Close();
// Open
char err[2048];
input = new MkvStdIO(filename);
if (input->fp) {
file = mkv_Open(input,err,sizeof(err));
// Failed parsing
if (!file) {
delete input;
throw wxString(_T("MatroskaParser error: ") + wxString(err,wxConvUTF8)).c_str();
}
// Parse
if (parse) Parse();
}
// Failed opening
else {
delete input;
throw _T("Unable to open Matroska file for parsing.");
}
}
//////////////
// Close file
void MatroskaWrapper::Close() {
if (file) {
mkv_Close(file);
file = NULL;
fclose(input->fp);
delete input;
}
keyFrames.Clear();
timecodes.clear();
}
////////////////////
// Return keyframes
wxArrayInt MatroskaWrapper::GetKeyFrames() {
return keyFrames;
}
///////////////////////
// Comparison operator
bool operator < (MkvFrame &t1, MkvFrame &t2) {
return t1.time < t2.time;
}
//////////////////
// Actually parse
void MatroskaWrapper::Parse() {
// Clear keyframes and timecodes
keyFrames.Clear();
bytePos.Clear();
timecodes.clear();
frames.clear();
rawFrames.clear();
bytePos.Clear();
// Get info
int tracks = mkv_GetNumTracks(file);
TrackInfo *trackInfo;
SegmentInfo *segInfo = mkv_GetFileInfo(file);
// Parse tracks
for (int track=0;track<tracks;track++) {
trackInfo = mkv_GetTrackInfo(file,track);
// Video track
if (trackInfo->Type == 1) {
// Variables
ulonglong startTime, endTime, filePos;
unsigned int rt, frameSize, frameFlags;
//CompressedStream *cs = NULL;
// Timecode scale
longlong timecodeScale = mkv_TruncFloat(trackInfo->TimecodeScale) * segInfo->TimecodeScale;
// Mask other tracks away
mkv_SetTrackMask(file, ~(1 << track));
// Progress bar
int totalTime = int(double(segInfo->Duration) / timecodeScale);
volatile bool canceled = false;
DialogProgress *progress = new DialogProgress(NULL,_("Parsing Matroska"),&canceled,_("Reading keyframe and timecode data from Matroska file."),0,totalTime);
progress->Show();
progress->SetProgress(0,1);
// Read frames
register int frameN = 0;
while (mkv_ReadFrame(file,0,&rt,&startTime,&endTime,&filePos,&frameSize,&frameFlags) == 0) {
// Read value
double curTime = double(startTime) / 1000000.0;
frames.push_back(MkvFrame((frameFlags & FRAME_KF) != 0,curTime,filePos));
frameN++;
// Cancelled?
if (canceled) {
Close();
throw _T("Canceled");
}
// Identical to (frameN % 2048) == 0,
// but much faster.
if ((frameN & (2048 - 1)) == 0)
// Update progress
progress->SetProgress(int(curTime),totalTime);
}
// Clean up progress
if (!canceled) progress->Destroy();
break;
}
}
// Copy raw
for (std::list<MkvFrame>::iterator cur=frames.begin();cur!=frames.end();cur++) {
rawFrames.push_back(*cur);
}
bool sortFirst = true;
if (sortFirst) {
// Process timecodes and keyframes
frames.sort();
MkvFrame curFrame(false,0,0);
int i = 0;
for (std::list<MkvFrame>::iterator cur=frames.begin();cur!=frames.end();cur++) {
curFrame = *cur;
if (curFrame.isKey) keyFrames.Add(i);
bytePos.Add(curFrame.filePos);
timecodes.push_back(curFrame.time);
i++;
}
}
else {
// Process keyframes
MkvFrame curFrame(false,0,0);
int i = 0;
for (std::list<MkvFrame>::iterator cur=frames.begin();cur!=frames.end();cur++) {
curFrame = *cur;
if (curFrame.isKey) keyFrames.Add(i);
bytePos.Add(curFrame.filePos);
i++;
}
// Process timecodes
frames.sort();
for (std::list<MkvFrame>::iterator cur=frames.begin();cur!=frames.end();cur++) {
curFrame = *cur;
timecodes.push_back(curFrame.time);
}
}
}
///////////////////////////
// Set target to timecodes
void MatroskaWrapper::SetToTimecodes(FrameRate &target) {
// Enough frames?
int frames = timecodes.size();
if (frames <= 1) return;
// Sort
//std::sort<std::vector<double>::iterator>(timecodes.begin(),timecodes.end());
// Check if it's CFR
bool isCFR = true;
double estimateCFR = timecodes.back() / (timecodes.size()-1);
double t1,t2;
for (int i=1;i<frames;i++) {
t1 = timecodes[i];
t2 = timecodes[i-1];
int delta = abs(int(t1 - t2 - estimateCFR));
if (delta > 2) {
isCFR = false;
break;
}
}
// Constant framerate
if (isCFR) {
estimateCFR = 1/estimateCFR * 1000.0;
if (fabs(estimateCFR - 24000.0/1001.0) < 0.02) estimateCFR = 24000.0 / 1001.0;
if (fabs(estimateCFR - 30000.0/1001.0) < 0.02) estimateCFR = 30000.0 / 1001.0;
target.SetCFR(estimateCFR);
}
// Variable framerate
else {
std::vector<int> times;
for (int i=0;i<frames;i++) times.push_back(int(timecodes[i]+0.5));
target.SetVFR(times);
}
}
/////////////////
// Get subtitles
void MatroskaWrapper::GetSubtitles(AssFile *target) {
// Get info
int tracks = mkv_GetNumTracks(file);
TrackInfo *trackInfo;
//SegmentInfo *segInfo = mkv_GetFileInfo(file);
wxArrayInt tracksFound;
wxArrayString tracksNames;
int trackToRead = -1;
// Haali's library variables
ulonglong startTime, endTime, filePos;
unsigned int rt, frameSize, frameFlags;
//CompressedStream *cs = NULL;
// Find tracks
for (int track=0;track<tracks;track++) {
trackInfo = mkv_GetTrackInfo(file,track);
// Subtitle track
if (trackInfo->Type == 0x11) {
wxString CodecID = wxString(trackInfo->CodecID,*wxConvCurrent);
wxString TrackName = wxString(trackInfo->Name,*wxConvCurrent);
wxString TrackLanguage = wxString(trackInfo->Language,*wxConvCurrent);
// Known subtitle format
if (CodecID == _T("S_TEXT/SSA") || CodecID == _T("S_TEXT/ASS") || CodecID == _T("S_TEXT/UTF8")) {
tracksFound.Add(track);
tracksNames.Add(wxString::Format(_T("%i ("),track) + CodecID + _T(" ") + TrackLanguage + _T("): ") + TrackName);
}
}
}
// No tracks found
if (tracksFound.Count() == 0) {
target->LoadDefault(true);
Close();
throw _T("File has no recognised subtitle tracks.");
}
// Only one track found
else if (tracksFound.Count() == 1) {
trackToRead = tracksFound[0];
}
// Pick a track
else {
int choice = wxGetSingleChoiceIndex(_T("Choose which track to read:"),_T("Multiple subtitle tracks found"),tracksNames);
if (choice == -1) {
target->LoadDefault(true);
Close();
throw _T("Canceled.");
}
trackToRead = tracksFound[choice];
}
// Picked track
if (trackToRead != -1) {
// Get codec type (0 = ASS/SSA, 1 = SRT)
trackInfo = mkv_GetTrackInfo(file,trackToRead);
wxString CodecID = wxString(trackInfo->CodecID,*wxConvCurrent);
int codecType = 0;
if (CodecID == _T("S_TEXT/UTF8")) codecType = 1;
// Read private data if it's ASS/SSA
if (codecType == 0) {
// Read raw data
trackInfo = mkv_GetTrackInfo(file,trackToRead);
unsigned int privSize = trackInfo->CodecPrivateSize;
char *privData = new char[privSize+1];
memcpy(privData,trackInfo->CodecPrivate,privSize);
privData[privSize] = 0;
wxString privString(privData,wxConvUTF8);
delete privData;
// Load into file
wxString group = _T("[Script Info]");
int lasttime = 0;
int version = 1;
if (CodecID == _T("S_TEXT/SSA")) version = 0;
wxStringTokenizer token(privString,_T("\r\n"),wxTOKEN_STRTOK);
while (token.HasMoreTokens()) {
wxString next = token.GetNextToken();
if (next[0] == _T('[')) group = next;
lasttime = target->AddLine(next,group,lasttime,version,&group);
}
// Insert "[Events]"
//target->AddLine(_T(""),group,lasttime,version,&group);
//target->AddLine(_T("[Events]"),group,lasttime,version,&group);
//target->AddLine(_T("Format: Layer, Start, End, Style, Name, MarginL, MarginR, MarginV, Effect, Text"),group,lasttime,version,&group);
}
// Load default if it's SRT
else {
target->LoadDefault(false);
}
// Read timecode scale
SegmentInfo *segInfo = mkv_GetFileInfo(file);
longlong timecodeScale = mkv_TruncFloat(trackInfo->TimecodeScale) * segInfo->TimecodeScale;
// Prepare STD vector to get lines inserted
std::vector<wxString> subList;
long int order = -1;
// Progress bar
int totalTime = int(double(segInfo->Duration) / timecodeScale);
volatile bool canceled = false;
DialogProgress *progress = new DialogProgress(NULL,_("Parsing Matroska"),&canceled,_("Reading subtitles from Matroska file."),0,totalTime);
progress->Show();
progress->SetProgress(0,1);
// Load blocks
mkv_SetTrackMask(file, ~(1 << trackToRead));
while (mkv_ReadFrame(file,0,&rt,&startTime,&endTime,&filePos,&frameSize,&frameFlags) == 0) {
// Canceled
if (canceled) {
target->LoadDefault(true);
Close();
throw _T("Canceled");
}
// Read to temp
char *tmp = new char[frameSize+1];
fseek(input->fp, filePos, SEEK_SET);
fread(tmp,1,frameSize,input->fp);
tmp[frameSize] = 0;
wxString blockString(tmp,wxConvUTF8);
// Get start and end times
//longlong timecodeScaleLow = timecodeScale / 100;
longlong timecodeScaleLow = 1000000;
AssTime subStart,subEnd;
subStart.SetMS(startTime / timecodeScaleLow);
subEnd.SetMS(endTime / timecodeScaleLow);
//wxLogMessage(subStart.GetASSFormated() + _T("-") + subEnd.GetASSFormated() + _T(": ") + blockString);
// Process SSA/ASS
if (codecType == 0) {
// Get order number
int pos = blockString.Find(_T(","));
wxString orderString = blockString.Left(pos);
orderString.ToLong(&order);
blockString = blockString.Mid(pos+1);
// Get layer number
pos = blockString.Find(_T(","));
long int layer = 0;
if (pos) {
wxString layerString = blockString.Left(pos);
layerString.ToLong(&layer);
blockString = blockString.Mid(pos+1);
}
// Assemble final
blockString = wxString::Format(_T("Dialogue: %i,"),layer) + subStart.GetASSFormated() + _T(",") + subEnd.GetASSFormated() + _T(",") + blockString;
}
// Process SRT
else {
blockString = wxString(_T("Dialogue: 0,")) + subStart.GetASSFormated() + _T(",") + subEnd.GetASSFormated() + _T(",Default,,0000,0000,0000,,") + blockString;
blockString.Replace(_T("\r\n"),_T("\\N"));
blockString.Replace(_T("\r"),_T("\\N"));
blockString.Replace(_T("\n"),_T("\\N"));
order++;
}
// Insert into vector
if (subList.size() == (unsigned int)order) subList.push_back(blockString);
else {
if ((signed)(subList.size()) < order+1) subList.resize(order+1);
subList[order] = blockString;
}
// Update progress bar
progress->SetProgress(int(double(startTime) / 1000000.0),totalTime);
}
// Insert into file
wxString group = _T("[Events]");
int lasttime = 0;
int version = (CodecID == _T("S_TEXT/SSA"));
for (unsigned int i=0;i<subList.size();i++) {
lasttime = target->AddLine(subList[i],group,lasttime,version,&group);
}
// Close progress bar
if (!canceled) progress->Destroy();
}
// No track to load
else {
target->LoadDefault(true);
}
}
////////////////////////////// LOTS OF HAALI C CODE DOWN HERE ///////////////////////////////////////
///////////////
// STDIO class
int StdIoRead(InputStream *_st, ulonglong pos, void *buffer, int count) {
MkvStdIO *st = (MkvStdIO *) _st;
size_t rd;
if (fseek(st->fp, pos, SEEK_SET)) {
st->error = errno;
return -1;
}
rd = fread(buffer, 1, count, st->fp);
if (rd == 0) {
if (feof(st->fp))
return 0;
st->error = errno;
return -1;
}
return rd;
}
/* scan for a signature sig(big-endian) starting at file position pos
* return position of the first byte of signature or -1 if error/not found
*/
longlong StdIoScan(InputStream *_st, ulonglong start, unsigned signature) {
MkvStdIO *st = (MkvStdIO *) _st;
int c;
unsigned cmp = 0;
FILE *fp = st->fp;
if (fseek(fp, start, SEEK_SET))
return -1;
while ((c = getc(fp)) != EOF) {
cmp = ((cmp << 8) | c) & 0xffffffff;
if (cmp == signature)
return ftell(fp) - 4;
}
return -1;
}
/* return cache size, this is used to limit readahead */
unsigned StdIoGetCacheSize(InputStream *_st) {
return CACHESIZE;
}
/* return last error message */
const char *StdIoGetLastError(InputStream *_st) {
MkvStdIO *st = (MkvStdIO *) _st;
return strerror(st->error);
}
/* memory allocation, this is done via stdlib */
void *StdIoMalloc(InputStream *_st, size_t size) {
return malloc(size);
}
void *StdIoRealloc(InputStream *_st, void *mem, size_t size) {
return realloc(mem,size);
}
void StdIoFree(InputStream *_st, void *mem) {
free(mem);
}
int StdIoProgress(InputStream *_st, ulonglong cur, ulonglong max) {
return 1;
}
MkvStdIO::MkvStdIO(wxString filename) {
read = StdIoRead;
scan = StdIoScan;
getcachesize = StdIoGetCacheSize;
geterror = StdIoGetLastError;
memalloc = StdIoMalloc;
memrealloc = StdIoRealloc;
memfree = StdIoFree;
progress = StdIoProgress;
wxFileName fname(filename);
fp = fopen(fname.GetShortPath().mb_str(wxConvUTF8),"rb");
if (fp) {
setvbuf(fp, NULL, _IOFBF, CACHESIZE);
}
}
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