forked from mia/Aegisub
4ec507f814
Document all of the SubtitleFormat methods. Add default implementations of CanReadFile and CanWriteFile that check against the appropriate wildcard list. Clean up and simplify a lot of very odd code. Throw typed exceptions in all subtitle readers rather than strings. Originally committed to SVN as r5617.
422 lines
11 KiB
C++
422 lines
11 KiB
C++
// Copyright (c) 2008, Rodrigo Braz Monteiro
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are met:
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//
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// * Redistributions of source code must retain the above copyright notice,
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// this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above copyright notice,
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// this list of conditions and the following disclaimer in the documentation
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// and/or other materials provided with the distribution.
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// * Neither the name of the Aegisub Group nor the names of its contributors
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// may be used to endorse or promote products derived from this software
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// without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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// POSSIBILITY OF SUCH DAMAGE.
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//
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// Aegisub Project http://www.aegisub.org/
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//
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// $Id$
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/// @file subtitle_format_dvd.cpp
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/// @brief Writing of DVD-compatible sub-pictures
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/// @ingroup subtitle_io vobsub
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///
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#include "config.h"
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#include "subtitle_format_dvd.h"
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#include "ass_dialogue.h"
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#include "ass_file.h"
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#include "include/aegisub/subtitles_provider.h"
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#include "video_provider_dummy.h"
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#undef _OPENMP
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#ifdef _OPENMP
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#include <omp.h>
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#endif
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#include <wx/file.h>
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//#undef MAX_PATH
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//#include <tessdll.h>
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//
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//#pragma comment(lib, "tessdll.lib")
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DVDSubtitleFormat::DVDSubtitleFormat()
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: SubtitleFormat("DVD Subpictures")
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{
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}
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wxArrayString DVDSubtitleFormat::GetWriteWildcards() const {
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wxArrayString results;
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results.Add("sup");
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return results;
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}
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void DVDSubtitleFormat::GetSubPictureList(std::vector<SubPicture> &pics) {
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// Create video frame
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int w = 720;
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int h = 480;
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VideoProvider *video = new DummyVideoProvider(10,1,w,h,wxColour(255,0,0),false);
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AegiVideoFrame srcFrame = video->GetFrame(0);
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delete video;
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// Count and index lines
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using std::list;
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int count = 0;
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std::vector<AssDialogue*> diags;
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for (list<AssEntry*>::iterator cur=Line->begin();cur!=Line->end();cur++) {
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AssDialogue *current = dynamic_cast<AssDialogue*>(*cur);
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if (current) {
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diags.push_back(current);
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count++;
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}
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}
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pics.resize(count);
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SubtitlesProvider *provider = NULL;
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provider = SubtitlesProviderFactory::GetProvider();
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provider->LoadSubtitles(GetAssFile());
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//TessDllAPI tess;
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// Write lines
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int i=0;
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#ifdef _OPENMP
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#pragma omp parallel for shared(diags,pics,provider) private(i)
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#endif
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for (i=0;i<count;i++) {
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// Dialogue
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AssDialogue *current = diags[i];
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// Get the image
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AegiVideoFrame dst;
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dst.CopyFrom(srcFrame);
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double time = (current->Start.GetMS()/1000.0 + current->End.GetMS()/1000.0)/2.0;
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#ifdef _OPENMP
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#pragma omp critical
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#endif
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{
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provider->DrawSubtitles(dst,time);
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}
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wxImage img = dst.GetImage();
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img.SaveFile("test.bmp");
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dst.Clear();
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// Tesseract test
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/*
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tess.BeginPageUpright(img.GetWidth(),img.GetHeight(),img.GetData(),24);
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ETEXT_DESC *output = tess.Recognize_all_Words();
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wxString blah;
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int j;
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for (int cur = 0; cur < output->count; cur = j) {
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const EANYCODE_CHAR* ch = &output->text[cur];
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unsigned char unistr[8];
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for (int b = 0; b < ch->blanks; ++b) blah += " ";
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for (j = cur; j < output->count; j++) {
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const EANYCODE_CHAR* unich = &output->text[j];
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if (ch->left != unich->left || ch->right != unich->right ||
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ch->top != unich->top || ch->bottom != unich->bottom)
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break;
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unistr[j - cur] = static_cast<unsigned char>(unich->char_code);
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}
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unistr[j - cur] = '\0';
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blah += wxString((char*)unistr,wxConvUTF8);
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if (ch->formatting & 64) blah += "\n";
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}
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wxLogMessage(blah);
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*/
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// Perform colour reduction on image
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unsigned char r,g,b;
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unsigned char *data = img.GetData();
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const unsigned char *dataRead = data;
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unsigned char *dataWrite = data;
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int startY = 0;
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int endY = 0;
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int startX = w;
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int endX = 0;
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// For each line
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for (int y=h;--y>=0;) {
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bool hasData = false;
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int lineStartX = 0;
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int lineEndX = 0;
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// Scan line
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for (int x=w;--x>=0;) {
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// Read
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r = *(dataRead++);
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g = *(dataRead++);
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b = *(dataRead++);
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// Background
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if (r > 127 && g < 20) {
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r = 200;
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g = 0;
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b = 0;
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}
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// Text
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else {
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// Mark coordinates
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hasData = true;
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if (lineStartX == 0) lineStartX = w-x-1;
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lineEndX = w-x-1;
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// Set colour
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if (r > 170 && g > 170) {
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r = 255;
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g = 255;
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b = 255;
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}
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else if (r > 85 && g > 85) {
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r = 127;
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g = 127;
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b = 127;
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}
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else {
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r = 0;
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g = 0;
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b = 0;
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}
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}
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// Write
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*(dataWrite++) = r;
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*(dataWrite++) = g;
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*(dataWrite++) = b;
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}
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// Mark as last found so far
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if (hasData) {
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if (startY == 0) startY = h-y-1;
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endY = h-y-1;
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if (lineStartX < startX) startX = lineStartX;
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if (lineEndX > endX) endX = lineEndX;
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}
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}
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// Save image data
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if (startX > endX) endX = startX;
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if (startY > endY) endY = startY;
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int sw = endX-startX+1;
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int sh = endY-startY+1;
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pics[i].x = startX;
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pics[i].y = startY;
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pics[i].w = sw;
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pics[i].h = sh;
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pics[i].start = current->Start.GetMS();
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pics[i].end = current->End.GetMS();
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// RLE to memory
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for (int j=0;j<2;j++) {
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int curCol = -1;
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int col;
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int temp;
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int len = 0;
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//wxImage subPic = img.GetSubImage(wxRect(startX,startY,sw,sh));
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dataRead = data + ((startY+j)*w+startX)*3;
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//dataRead = subPic.GetData();
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std::vector<RLEGroup> groups;
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groups.reserve(1024);
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// Read this scanline
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for (int y=startY+j;y<=endY;y+=2) {
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for (int x=startX;x<=endX;x++) {
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// Read current pixel colour
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temp = *dataRead;
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if (temp == 200) col = 0;
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else if (temp == 255) col = 1;
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else if (temp == 0) col = 2;
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else col = 3;
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// See if it matches
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if (col == curCol) {
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len++;
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if (len == 255) {
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groups.push_back(RLEGroup(curCol,len,false));
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len = 0;
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}
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}
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else {
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if (len) groups.push_back(RLEGroup(curCol,len,false));
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len = 1;
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curCol = col;
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}
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dataRead += 3;
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}
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// Flush
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if (len) groups.push_back(RLEGroup(curCol,0,true));
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else {
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groups.back().len = 0;
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groups.back().eol = true;
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}
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curCol = -1;
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len = 0;
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// Advance
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dataRead += (2*w-sw)*3;
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//dataRead += sw*3;
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}
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// Encode into subpicture format
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int nibble[4];
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nibble[3] = 0;
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bool off = false;
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std::vector<unsigned char> &data = pics[i].data[j];
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unsigned char last = 0;
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for (size_t m=0;m<groups.size();m++) {
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unsigned char len = groups[m].len;
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int nibbles;
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// End of line, write b000000cc
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if (groups[m].eol) nibbles = 4;
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// Get proper nibble count
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else {
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if (len < 4) nibbles = 1;
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else if (len < 16) nibbles = 2;
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else if (len < 64) nibbles = 3;
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else nibbles = 4;
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}
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// Write nibbles
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nibble[0] = groups[m].col | ((len & 0x3) << 2);
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nibble[1] = (len & 0x3C) >> 2;
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nibble[2] = (len & 0xC0) >> 6;
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for (int n=nibbles;--n>=0;) {
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wxASSERT(nibble[n] >= 0 && nibble[n] < 16);
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wxASSERT(n >= 0 && n < 4);
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if (!off) {
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last = nibble[n] << 4;
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data.push_back(last);
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}
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else data.back() = nibble[n] | last;
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off = !off;
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// Check if just wrote end of line
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if (len == 0 && n == 0) {
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last = 0;
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off = false;
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}
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}
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}
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data.resize(data.size());
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}
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}
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// Clean up
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delete provider;
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srcFrame.Clear();
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}
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/// @brief Actually write them
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/// @param filename
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/// @param encoding
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///
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void DVDSubtitleFormat::WriteFile(wxString const& filename, wxString const& encoding) {
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// Prepare subtitles
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CreateCopy();
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SortLines();
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StripComments();
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RecombineOverlaps();
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MergeIdentical();
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// Get subpictures
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std::vector<SubPicture> pics;
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GetSubPictureList(pics);
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// Open file for writing
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wxFile fp(filename,wxFile::write);
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if (!fp.IsOpened()) throw "Could not open file for writing.";
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// Write each subpicture
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size_t pos = 0;
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for (size_t i=0;i<pics.size();i++) {
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// Write sup packet data
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pos += fp.Write("SP",2);
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wxUint32 temp = wxUINT32_SWAP_ON_BE(pics[i].start * 90);
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pos += fp.Write(&temp,4);
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temp = 0;
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pos += fp.Write(&temp,4);
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// Calculate lengths
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size_t controlLen = 30;
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size_t packetLen = 4 + pics[i].data[0].size() + pics[i].data[1].size() + controlLen;
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size_t packetStart = pos;
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// Write position of the next packet and control
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unsigned short temp2;
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temp2 = wxUINT16_SWAP_ON_LE(packetLen);
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pos += fp.Write(&temp2,2);
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temp2 = wxUINT16_SWAP_ON_LE(packetLen-controlLen);
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pos += fp.Write(&temp2,2);
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// Write RLE data
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size_t line0pos = pos - packetStart;
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pos += fp.Write(&pics[i].data[0][0],pics[i].data[0].size());
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size_t line1pos = pos - packetStart;
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pos += fp.Write(&pics[i].data[1][0],pics[i].data[1].size());
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// Control group data
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size_t comm2add = packetLen - 6;
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unsigned char comm2_b1 = (comm2add & 0xFF00) >> 8;
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unsigned char comm2_b2 = comm2add & 0xFF;
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unsigned char pix0_b1 = (line0pos & 0xFF00) >> 8;
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unsigned char pix0_b2 = line0pos & 0xFF;
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unsigned char pix1_b1 = (line1pos & 0xFF00) >> 8;
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unsigned char pix1_b2 = line1pos & 0xFF;
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int delay = (pics[i].end - pics[i].start)*90/1024;
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unsigned char delay_b1 = (delay & 0xFF00) >> 8;
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unsigned char delay_b2 = delay & 0xFF;
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int sx = pics[i].x;
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int sy = pics[i].y;
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int ex = pics[i].w + sx - 1;
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int ey = pics[i].h + sy - 1;
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unsigned char dispx_b1 = (sx & 0xFF0) >> 4;
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unsigned char dispx_b2 = ((sx & 0x0F) << 4) | ((ex & 0xF00) >> 8);
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unsigned char dispx_b3 = (ex & 0xFF);
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unsigned char dispy_b1 = (sy & 0xFF0) >> 4;
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unsigned char dispy_b2 = ((sy & 0x0F) << 4) | ((ey & 0xF00) >> 8);
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unsigned char dispy_b3 = (ey & 0xFF);
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// Write control group
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unsigned char control[] = {
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0x00, 0x00, // Delay
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comm2_b1, comm2_b2, // Next command
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0x01, // Start display
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0x03, 0x82, 0x30, // Set colours
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0x04, 0xFF, 0xF0, // Alpha blend
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0x05, dispx_b1, dispx_b2, dispx_b3, dispy_b1, dispy_b2, dispy_b3, // Display area
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0x06, pix0_b1, pix0_b2, pix1_b1, pix1_b2, // Pixel pointers
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0xFF, // End block 1
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delay_b1, delay_b2, // Delay
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comm2_b1, comm2_b2, // This command
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0x02, // Stop display
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0xFF // End
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};
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pos += fp.Write(control,controlLen);
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}
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}
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