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Aegisub/aegisub/src/subtitle_format_dvd.cpp

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// Copyright (c) 2008, 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
//
// Website: http://aegisub.cellosoft.com
// Contact: mailto:zeratul@cellosoft.com
//
///////////
// Headers
#include "config.h"
#include "subtitle_format_dvd.h"
#include "video_provider_dummy.h"
#include "subtitles_provider_manager.h"
#include "ass_dialogue.h"
#include "ass_file.h"
#undef _OPENMP
#ifdef _OPENMP
#include <omp.h>
#endif
#include <wx/file.h>
//#undef MAX_PATH
//#include <tessdll.h>
//
//#pragma comment(lib, "tessdll.lib")
///////////////
// Format name
wxString DVDSubtitleFormat::GetName() {
return _T("DVD Subpictures");
}
//////////////
// Extensions
wxArrayString DVDSubtitleFormat::GetWriteWildcards() {
wxArrayString results;
results.Add(_T("sup"));
return results;
}
/////////////
// Can write
bool DVDSubtitleFormat::CanWriteFile(wxString filename) {
return (filename.Lower().EndsWith(_T(".sup")));
}
///////////////////////
// Get subpicture list
void DVDSubtitleFormat::GetSubPictureList(std::vector<SubPicture> &pics) {
// Create video frame
int w = 720;
int h = 480;
VideoProvider *video = new DummyVideoProvider(10,1,w,h,wxColour(255,0,0),false);
AegiVideoFrame srcFrame = video->GetFrame(0,FORMAT_RGB32);
delete video;
// Count and index lines
using std::list;
int count = 0;
std::vector<AssDialogue*> diags;
for (list<AssEntry*>::iterator cur=Line->begin();cur!=Line->end();cur++) {
AssDialogue *current = AssEntry::GetAsDialogue(*cur);
if (current) {
diags.push_back(current);
count++;
}
}
pics.resize(count);
SubtitlesProvider *provider = NULL;
provider = SubtitlesProviderFactoryManager::GetProvider();
provider->LoadSubtitles(GetAssFile());
//TessDllAPI tess;
// Write lines
int i=0;
#ifdef _OPENMP
#pragma omp parallel for shared(diags,pics,provider) private(i)
#endif
for (i=0;i<count;i++) {
// Dialogue
AssDialogue *current = diags[i];
// Get the image
AegiVideoFrame dst;
dst.CopyFrom(srcFrame);
double time = (current->Start.GetMS()/1000.0 + current->End.GetMS()/1000.0)/2.0;
#ifdef _OPENMP
#pragma omp critical
#endif
{
provider->DrawSubtitles(dst,time);
}
wxImage img = dst.GetImage();
img.SaveFile(_T("test.bmp"));
dst.Clear();
// Tesseract test
/*
tess.BeginPageUpright(img.GetWidth(),img.GetHeight(),img.GetData(),24);
ETEXT_DESC *output = tess.Recognize_all_Words();
wxString blah;
int j;
for (int cur = 0; cur < output->count; cur = j) {
const EANYCODE_CHAR* ch = &output->text[cur];
unsigned char unistr[8];
for (int b = 0; b < ch->blanks; ++b) blah += _T(" ");
for (j = cur; j < output->count; j++) {
const EANYCODE_CHAR* unich = &output->text[j];
if (ch->left != unich->left || ch->right != unich->right ||
ch->top != unich->top || ch->bottom != unich->bottom)
break;
unistr[j - cur] = static_cast<unsigned char>(unich->char_code);
}
unistr[j - cur] = '\0';
blah += wxString((char*)unistr,wxConvUTF8);
if (ch->formatting & 64) blah += _T("\n");
}
wxLogMessage(blah);
*/
// Perform colour reduction on image
unsigned char r,g,b;
unsigned char *data = img.GetData();
const unsigned char *dataRead = data;
unsigned char *dataWrite = data;
int startY = 0;
int endY = 0;
int startX = w;
int endX = 0;
// For each line
for (int y=h;--y>=0;) {
bool hasData = false;
int lineStartX = 0;
int lineEndX = 0;
// Scan line
for (int x=w;--x>=0;) {
// Read
r = *(dataRead++);
g = *(dataRead++);
b = *(dataRead++);
// Background
if (r > 127 && g < 20) {
r = 200;
g = 0;
b = 0;
}
// Text
else {
// Mark coordinates
hasData = true;
if (lineStartX == 0) lineStartX = w-x-1;
lineEndX = w-x-1;
// Set colour
if (r > 170 && g > 170) {
r = 255;
g = 255;
b = 255;
}
else if (r > 85 && g > 85) {
r = 127;
g = 127;
b = 127;
}
else {
r = 0;
g = 0;
b = 0;
}
}
// Write
*(dataWrite++) = r;
*(dataWrite++) = g;
*(dataWrite++) = b;
}
// Mark as last found so far
if (hasData) {
if (startY == 0) startY = h-y-1;
endY = h-y-1;
if (lineStartX < startX) startX = lineStartX;
if (lineEndX > endX) endX = lineEndX;
}
}
// Save image data
if (startX > endX) endX = startX;
if (startY > endY) endY = startY;
int sw = endX-startX+1;
int sh = endY-startY+1;
pics[i].x = startX;
pics[i].y = startY;
pics[i].w = sw;
pics[i].h = sh;
pics[i].start = current->Start.GetMS();
pics[i].end = current->End.GetMS();
// RLE to memory
for (int j=0;j<2;j++) {
int curCol = -1;
int col;
int temp;
int len = 0;
//wxImage subPic = img.GetSubImage(wxRect(startX,startY,sw,sh));
dataRead = data + ((startY+j)*w+startX)*3;
//dataRead = subPic.GetData();
std::vector<RLEGroup> groups;
groups.reserve(1024);
// Read this scanline
for (int y=startY+j;y<=endY;y+=2) {
for (int x=startX;x<=endX;x++) {
// Read current pixel colour
temp = *dataRead;
if (temp == 200) col = 0;
else if (temp == 255) col = 1;
else if (temp == 0) col = 2;
else col = 3;
// See if it matches
if (col == curCol) {
len++;
if (len == 255) {
groups.push_back(RLEGroup(curCol,len,false));
len = 0;
}
}
else {
if (len) groups.push_back(RLEGroup(curCol,len,false));
len = 1;
curCol = col;
}
dataRead += 3;
}
// Flush
if (len) groups.push_back(RLEGroup(curCol,0,true));
else {
groups.back().len = 0;
groups.back().eol = true;
}
curCol = -1;
len = 0;
// Advance
dataRead += (2*w-sw)*3;
//dataRead += sw*3;
}
// Encode into subpicture format
int nibble[4];
nibble[3] = 0;
bool off = false;
std::vector<unsigned char> &data = pics[i].data[j];
unsigned char last = 0;
for (size_t m=0;m<groups.size();m++) {
unsigned char len = groups[m].len;
int nibbles;
// End of line, write b000000cc
if (groups[m].eol) nibbles = 4;
// Get proper nibble count
else {
if (len < 4) nibbles = 1;
else if (len < 16) nibbles = 2;
else if (len < 64) nibbles = 3;
else nibbles = 4;
}
// Write nibbles
nibble[0] = groups[m].col | ((len & 0x3) << 2);
nibble[1] = (len & 0x3C) >> 2;
nibble[2] = (len & 0xC0) >> 6;
for (int n=nibbles;--n>=0;) {
wxASSERT(nibble[n] >= 0 && nibble[n] < 16);
wxASSERT(n >= 0 && n < 4);
if (!off) {
last = nibble[n] << 4;
data.push_back(last);
}
else data.back() = nibble[n] | last;
off = !off;
// Check if just wrote end of line
if (len == 0 && n == 0) {
last = 0;
off = false;
}
}
}
data.resize(data.size());
}
}
// Clean up
delete provider;
srcFrame.Clear();
}
///////////////////////
// Actually write them
void DVDSubtitleFormat::WriteFile(wxString filename,wxString encoding) {
// Prepare subtitles
CreateCopy();
SortLines();
StripComments();
RecombineOverlaps();
MergeIdentical();
// Get subpictures
std::vector<SubPicture> pics;
GetSubPictureList(pics);
// Open file for writing
wxFile fp(filename,wxFile::write);
if (!fp.IsOpened()) throw _T("Could not open file for writing.");
// Write each subpicture
size_t pos = 0;
for (size_t i=0;i<pics.size();i++) {
// Write sup packet data
pos += fp.Write("SP",2);
wxUint32 temp = wxUINT32_SWAP_ON_BE(pics[i].start * 90);
pos += fp.Write(&temp,4);
temp = 0;
pos += fp.Write(&temp,4);
// Calculate lengths
size_t controlLen = 30;
size_t packetLen = 4 + pics[i].data[0].size() + pics[i].data[1].size() + controlLen;
size_t packetStart = pos;
// Write position of the next packet and control
unsigned short temp2;
temp2 = wxUINT16_SWAP_ON_LE(packetLen);
pos += fp.Write(&temp2,2);
temp2 = wxUINT16_SWAP_ON_LE(packetLen-controlLen);
pos += fp.Write(&temp2,2);
// Write RLE data
size_t line0pos = pos - packetStart;
pos += fp.Write(&pics[i].data[0][0],pics[i].data[0].size());
size_t line1pos = pos - packetStart;
pos += fp.Write(&pics[i].data[1][0],pics[i].data[1].size());
// Control group data
size_t comm2add = packetLen - 6;
unsigned char comm2_b1 = (comm2add & 0xFF00) >> 8;
unsigned char comm2_b2 = comm2add & 0xFF;
unsigned char pix0_b1 = (line0pos & 0xFF00) >> 8;
unsigned char pix0_b2 = line0pos & 0xFF;
unsigned char pix1_b1 = (line1pos & 0xFF00) >> 8;
unsigned char pix1_b2 = line1pos & 0xFF;
int delay = (pics[i].end - pics[i].start)*90/1024;
unsigned char delay_b1 = (delay & 0xFF00) >> 8;
unsigned char delay_b2 = delay & 0xFF;
int sx = pics[i].x;
int sy = pics[i].y;
int ex = pics[i].w + sx - 1;
int ey = pics[i].h + sy - 1;
unsigned char dispx_b1 = (sx & 0xFF0) >> 4;
unsigned char dispx_b2 = ((sx & 0x0F) << 4) | ((ex & 0xF00) >> 8);
unsigned char dispx_b3 = (ex & 0xFF);
unsigned char dispy_b1 = (sy & 0xFF0) >> 4;
unsigned char dispy_b2 = ((sy & 0x0F) << 4) | ((ey & 0xF00) >> 8);
unsigned char dispy_b3 = (ey & 0xFF);
// Write control group
unsigned char control[] = {
0x00, 0x00, // Delay
comm2_b1, comm2_b2, // Next command
0x01, // Start display
0x03, 0x82, 0x30, // Set colours
0x04, 0xFF, 0xF0, // Alpha blend
0x05, dispx_b1, dispx_b2, dispx_b3, dispy_b1, dispy_b2, dispy_b3, // Display area
0x06, pix0_b1, pix0_b2, pix1_b1, pix1_b2, // Pixel pointers
0xFF, // End block 1
delay_b1, delay_b2, // Delay
comm2_b1, comm2_b2, // This command
0x02, // Stop display
0xFF // End
};
pos += fp.Write(control,controlLen);
}
}
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