forked from mia/Aegisub
294 lines
8.9 KiB
C++
294 lines
8.9 KiB
C++
// Copyright (c) 2006, 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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// -----------------------------------------------------------------------------
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//
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// AEGISUB
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//
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// Website: http://aegisub.cellosoft.com
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// Contact: mailto:zeratul@cellosoft.com
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//
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///////////
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// Headers
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#include <wx/image.h>
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#include <wx/mstream.h>
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#include "subtitle_format_prs.h"
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#include "ass_file.h"
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#include "ass_dialogue.h"
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#include "avisynth_wrap.h"
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#include "video_box.h"
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#include "video_display.h"
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#include "video_provider.h"
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#include "main.h"
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#include "frame_main.h"
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#include "vfr.h"
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#include "utils.h"
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#include "../prs/prs_file.h"
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#include "../prs/prs_image.h"
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#include "../prs/prs_display.h"
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//////////////////////
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// Can write to file?
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bool PRSSubtitleFormat::CanWriteFile(wxString filename) {
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#ifdef __WINDOWS__
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return (filename.Right(4).Lower() == _T(".prs"));
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#else
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return false;
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#endif
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}
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//////////////
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// Write file
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void PRSSubtitleFormat::WriteFile(wxString filename,wxString encoding) {
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#ifdef __WINDOWS__
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// Video loaded?
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VideoDisplay *display = ((AegisubApp*)wxTheApp)->frame->videoBox->videoDisplay;
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// Create file
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PRSFile file;
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// Open two Avisynth environments
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AviSynthWrapper avs1,avs2;
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IScriptEnvironment *env1 = avs1.GetEnv();
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IScriptEnvironment *env2 = avs2.GetEnv();
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// Prepare environments
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wxString val = wxString::Format(_T("BlankClip(pixel_type=\"RGB32\",length=%i,width=%i,height=%i,fps=%f"),display->provider->GetFrameCount(),display->provider->GetSourceWidth(),display->provider->GetSourceHeight(),display->provider->GetFPS());
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AVSValue script1 = env1->Invoke("Eval",AVSValue(wxString(val + _T(",color=$000000)")).mb_str(wxConvUTF8)));
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AVSValue script2 = env2->Invoke("Eval",AVSValue(wxString(val + _T(",color=$FFFFFF)")).mb_str(wxConvUTF8)));
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char temp[512];
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strcpy(temp,display->GetTempWorkFile().mb_str(wxConvLocal));
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AVSValue args1[2] = { script1.AsClip(), temp };
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AVSValue args2[2] = { script2.AsClip(), temp };
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try {
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script1 = env1->Invoke("TextSub", AVSValue(args1,2));
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script2 = env2->Invoke("TextSub", AVSValue(args2,2));
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}
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catch (AvisynthError &err) {
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throw _T("AviSynth error: ") + wxString(err.msg,wxConvLocal);
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}
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// Loop through subtitles in file
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AssFile *ass = AssFile::top;
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AssDialogue *diag = NULL;
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PClip clip1 = script1.AsClip();
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PClip clip2 = script2.AsClip();
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int id = 0;
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for (entryIter cur=ass->Line.begin();cur!=ass->Line.end();cur++) {
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diag = AssEntry::GetAsDialogue(*cur);
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// Dialogue found
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if (diag) {
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// Read its image
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int framen = VFR_Output.GetFrameAtTime(diag->Start.GetMS(),true);
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PVideoFrame frame1 = clip1->GetFrame(framen,env1);
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PVideoFrame frame2 = clip2->GetFrame(framen,env2);
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// Convert to PNG
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int x=0,y=0;
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wxImage bmp = CalculateAlpha(frame1->GetReadPtr(),frame2->GetReadPtr(),frame1->GetRowSize(),frame1->GetHeight(),frame1->GetPitch(),&x,&y);
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if (!bmp.Ok()) continue;
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wxMemoryOutputStream stream;
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bmp.SaveFile(stream,wxBITMAP_TYPE_PNG);
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bmp.SaveFile(filename + wxString::Format(_T("%i.png"),id),wxBITMAP_TYPE_PNG);
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// Create PRSImage
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PRSImage *img = new PRSImage;
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img->id = id;
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img->dataLen = stream.GetSize();
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img->data = new char[img->dataLen];
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img->imageType = PNG_IMG;
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stream.CopyTo(img->data,img->dataLen);
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// Create PRSDisplay
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PRSDisplay *display = new PRSDisplay;
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display->start = diag->Start.GetMS();
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display->end = diag->End.GetMS();
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display->id = id;
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display->x = x;
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display->y = y;
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display->alpha = 255;
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display->blend = 0;
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// Insert into list
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file.AddEntry(img);
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file.AddEntry(display);
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id++;
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}
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}
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// Save file
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file.Save((const char*)filename.mb_str(wxConvLocal));
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#endif
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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// TODO!! MOVE THE TWO FUNCTIONS BELOW INTO A CLASS OF THEIR OWN, THEY MIGHT FIND USE ELSEWHERE. //
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// Obvious choice would be the subtitles_rasterizer.h derivation for vsfilter, when that exists. //
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///////////////////////////////////////////////////////////////////////////////////////////////////
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//////////////////////////////////////////////
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// Generates a 32-bit wxImage from two frames
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// ------------------------------------------
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// Frame 1 should have the image on a BLACK background
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// Frame 2 should have the same image on a WHITE background
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wxImage PRSSubtitleFormat::CalculateAlpha(const unsigned char* frame1, const unsigned char* frame2, int w, int h, int pitch, int *dstx, int *dsty) {
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// Allocate image data
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unsigned char *data = (unsigned char*) malloc(sizeof(unsigned char)*w*h*3);
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unsigned char *alpha = (unsigned char*) malloc(sizeof(unsigned char)*w*h);
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// Pointers
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const unsigned char *src1 = frame1;
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const unsigned char *src2 = frame2;
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unsigned char *dst = data + ((h-1)*w*3/4);
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unsigned char *dsta = alpha + ((h-1)*w/4);
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// Boundaries
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int minx = w;
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int miny = h;
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int maxx = 0;
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int maxy = 0;
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// Process
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unsigned char r1,g1,b1,r2,g2,b2;
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unsigned char r,g,b,a;
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for (int y=h;--y>=0;) {
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for (int x=0;x<w;x+=4) {
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// Read pixels
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b1 = *(src1++);
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b2 = *(src2++);
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g1 = *(src1++);
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g2 = *(src2++);
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r1 = *(src1++);
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r2 = *(src2++);
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src1++;
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src2++;
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// Calculate new values
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a = 255 + r1 - r2;
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if (a == 0) {
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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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else {
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// Update range
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if (x < minx) minx = x;
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else if (x > maxx) maxx = x;
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if (y < miny) miny = y;
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else if (y > maxy) maxy = y;
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// Calculate colour components
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int mod;
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if (a > 8) mod = 0;
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else mod = 256 >> a;
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r = MAX(0,r1-mod)*255 / a;
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g = MAX(0,g1-mod)*255 / a;
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b = MAX(0,b1-mod)*255 / a;
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}
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// Write to destination
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*(dst++) = r;
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*(dst++) = g;
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*(dst++) = b;
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*(dsta++) = a;
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}
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// Roll back dst
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dst -= w*3/2;
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dsta -= w/2;
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}
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// Calculate sizes
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minx /= 4;
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maxx /= 4;
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if (dstx) *dstx = minx;
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if (dsty) *dsty = miny;
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int width = maxx-minx+1;
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int height = maxy-miny+1;
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if (width <= 0 || height <= 0) return wxImage();
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// Create the actual image
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wxImage img(w/4,h,data,false);
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img.SetAlpha(alpha,false);
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// Return subimage
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wxImage subimg = SubImageWithAlpha(img,wxRect(minx,miny,width,height));
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return subimg;
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}
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////////////////////////////////////////////////
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// Creates a sub image preserving alpha channel
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// Modified from wx's source
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wxImage PRSSubtitleFormat::SubImageWithAlpha (wxImage source,const wxRect &rect) {
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wxImage image;
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wxCHECK_MSG(source.Ok(), image, wxT("invalid image") );
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wxCHECK_MSG((rect.GetLeft()>=0) && (rect.GetTop()>=0) && (rect.GetRight()<=source.GetWidth()) && (rect.GetBottom()<=source.GetHeight()), image, wxT("invalid subimage size") );
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int subwidth=rect.GetWidth();
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const int subheight=rect.GetHeight();
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image.Create(subwidth, subheight, false);
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image.SetAlpha();
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unsigned char *subdata = image.GetData();
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unsigned char *data = source.GetData();
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unsigned char *subalpha = image.GetAlpha();
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unsigned char *alpha = source.GetAlpha();
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wxCHECK_MSG(subdata, image, wxT("unable to create image"));
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const int subleft=3*rect.GetLeft();
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const int width=3*source.GetWidth();
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const int afullwidth=source.GetWidth();
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int awidth = subwidth;
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subwidth*=3;
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data+=rect.GetTop()*width+subleft;
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alpha+=rect.GetTop()*afullwidth+rect.GetLeft();
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for (long j = 0; j < subheight; ++j) {
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memcpy(subdata, data, subwidth);
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memcpy(subalpha, alpha, awidth);
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subdata+=subwidth;
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subalpha+=awidth;
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data+=width;
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alpha+=afullwidth;
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}
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return image;
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}
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