CCDecoder.cpp

/* 
 *      Copyright (C) 2003-2005 Gabest
 *      http://www.gabest.org
 *
 *  This Program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2, or (at your option)
 *  any later version.
 *   
 *  This Program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 *  GNU General Public License for more details.
 *   
 *  You should have received a copy of the GNU General Public License
 *  along with GNU Make; see the file COPYING.  If not, write to
 *  the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. 
 *  http://www.gnu.org/copyleft/gpl.html
 *
 */

#include "StdAfx.h"
#include "ccdecoder.h"

CCDecoder::CCDecoder(CString fn, CString rawfn) : m_fn(fn), m_rawfn(rawfn)
{
        m_sts.CreateDefaultStyle(ANSI_CHARSET);

        m_time = 0;
        m_fEndOfCaption = false;
        memset(m_buff, 0, sizeof(m_buff));
        memset(m_disp, 0, sizeof(m_disp));
        m_cursor = CPoint(0, 0);

        if(!m_rawfn.IsEmpty()) 
                _tremove(m_rawfn);
}

CCDecoder::~CCDecoder()
{
        if(m_sts.GetSize() > 0 && !m_fn.IsEmpty()) 
        {
                m_sts.Sort();
                m_sts.SaveAs(m_fn, EXTSRT, -1, CTextFile::ASCII);
                m_sts.SaveAs(m_fn.Left(m_fn.ReverseFind('.')+1) + _T("utf8.srt"), EXTSRT, -1, CTextFile::UTF8);
                m_sts.SaveAs(m_fn.Left(m_fn.ReverseFind('.')+1) + _T("utf16le.srt"), EXTSRT, -1, CTextFile::LE16);
                m_sts.SaveAs(m_fn.Left(m_fn.ReverseFind('.')+1) + _T("utf16be.srt"), EXTSRT, -1, CTextFile::BE16);
        }
}

void CCDecoder::MoveCursor(int x, int y)
{
        m_cursor = CPoint(x, y);
        if(m_cursor.x < 0) m_cursor.x = 0;
        if(m_cursor.y < 0) m_cursor.y = 0;
        if(m_cursor.x >= 32) m_cursor.x = 0, m_cursor.y++;
        if(m_cursor.y >= 16) m_cursor.y = 0;
}

void CCDecoder::OffsetCursor(int x, int y)
{
        MoveCursor(m_cursor.x + x, m_cursor.y + y);
}

void CCDecoder::PutChar(WCHAR c)
{
        m_buff[m_cursor.y][m_cursor.x] = c;
        OffsetCursor(1, 0);
}

void CCDecoder::SaveDisp(__int64 time)
{
        CStringW str;

        for(int row = 0; row < 16; row++)
        {
                bool fNonEmptyRow = false;

                for(int col = 0; col < 32; col++)
                {
                        if(m_disp[row][col]) 
                        {
                                CStringW str2(&m_disp[row][col]);
                                if(fNonEmptyRow) str += ' ';
                                str += str2;
                                col += str2.GetLength();
                                fNonEmptyRow = true;
                        }
                }

                if(fNonEmptyRow) str += '\n';
        }

        if(str.IsEmpty()) return;

        m_sts.Add(str, true, (int)m_time, (int)time);
}

void CCDecoder::DecodeCC(BYTE* buff, int len, __int64 time)
{
        if(!m_rawfn.IsEmpty())
        {
                if(FILE* f = _tfopen(m_rawfn, _T("at")))
                {
                        _ftprintf(f, _T("%02d:%02d:%02d.%03d\n"), 
                                (int)(time/1000/60/60), 
                                (int)((time/1000/60)%60), 
                                (int)((time/1000)%60), 
                                (int)(time%1000));

                        for(int i = 0; i < len; i++)
                        {
                                _ftprintf(f, _T("%02x"), buff[i]);
                                if(i < len-1) _ftprintf(f, _T(" "));
                                if(i > 0 && (i&15)==15) _ftprintf(f, _T("\n"));
                        }
                        if(len > 0) _ftprintf(f, _T("\n\n"));
                        fclose(f);
                }
        }

        for(int i = 0; i < len; i++)
        {
                BYTE c = buff[i]&0x7f;
                if(c >= 0x20)
                {
                        static WCHAR charmap[0x60] = 
                        {
                                ' ','!','"','#','$','%','&','\'','(',')','á','+',',','-','.','/',
                                '0','1','2','3','4','5','6','7','8','9',':',';','<','=','>','?',
                                '@','A','B','C','D','E','F','G','H','I','J','K','L','M','N','O',
                                'P','Q','R','S','T','U','V','W','X','Y','Z','[','é',']','í','ó',
                                'ú','a','b','c','d','e','f','g','h','i','j','k','l','m','n','o',
                                'p','q','r','s','t','u','v','w','x','y','z','ç','÷','N','n','?'
                        };

                        PutChar(charmap[c - 0x20]);
                }
                else if(buff[i] != 0x80 && i < len-1)
                {
                        // codes and special characters are supposed to be doubled
                        if(i < len-3 && buff[i] == buff[i+2] && buff[i+1] == buff[i+3])
                                i += 2;

                        c = buff[i+1]&0x7f;
                        if(buff[i] == 0x91 && c >= 0x20 && c < 0x30) // formating
                        {
                                // TODO
                        }
                        else if(buff[i] == 0x91 && c == 0x39) // transparent space
                        {
                                OffsetCursor(1, 0);
                        }
                        else if(buff[i] == 0x91 && c >= 0x30 && c < 0x40) // special characters
                        {
                                static WCHAR charmap[0x10] =
                                {
                                        0x00ae, // (r)egistered
                                        0x00b0, // degree
                                        0x00bd, // 1/2
                                        0x00bf, // inverted question mark
                                        0x2122, // trade mark
                                        0x00a2, // cent
                                        0x00a3, // pound
                                        0x266a, // music
                                        0x00e0, // a`
                                        0x00ff, // transparent space, handled above
                                        0x00e8, // e`
                                        0x00e2, // a^
                                        0x00ea, // e^
                                        0x00ee, // i^
                                        0x00f4, // o^
                                        0x00fb, // u^
                                };

                                PutChar(charmap[c - 0x30]);
                        }
                        else if(buff[i] == 0x92 && c >= 0x20 && c < 0x40) // extended characters
                        {
                                static WCHAR charmap[0x20] =
                                {
                                        0x00c0, // A'
                                        0x00c9, // E'
                                        0x00d3, // O'
                                        0x00da, // U'
                                        0x00dc, // U:
                                        0x00fc, // u:
                                        0x2018, // `
                                        0x00a1, // inverted !
                                        0x002a, // *
                                        0x2019, // '
                                        0x002d, // -
                                        0x00a9, // (c)opyright
                                        0x2120, // SM
                                        0x00b7, // . (dot in the middle)
                                        0x201c, // inverted "
                                        0x201d, // "

                                        0x00c1, // A`
                                        0x00c2, // A^
                                        0x00c7, // C,
                                        0x00c8, // E`
                                        0x00ca, // E^
                                        0x00cb, // E:
                                        0x00eb, // e:
                                        0x00ce, // I^
                                        0x00cf, // I:
                                        0x00ef, // i:
                                        0x00d4, // O^
                                        0x00d9, // U`
                                        0x00f9, // u`
                                        0x00db, // U^
                                        0x00ab, // <<
                                        0x00bb, // >>
                                };

                                PutChar(charmap[c - 0x20]);
                        }
                        else if(buff[i] == 0x13 && c >= 0x20 && c < 0x40) // more extended characters
                        {
                                static WCHAR charmap[0x20] =
                                {
                                        0x00c3, // A~
                                        0x00e3, // a~
                                        0x00cd, // I'
                                        0x00cc, // I`
                                        0x00ec, // i`
                                        0x00d2, // O`
                                        0x00f2, // o`
                                        0x00d5, // O~
                                        0x00f5, // o~
                                        0x007b, // {
                                        0x007d, // }
                                        0x005c, // /* \ */
                                        0x005e, // ^
                                        0x005f, // _
                                        0x00a6, // |
                                        0x007e, // ~

                                        0x00c4, // A:
                                        0x00e4, // a:
                                        0x00d6, // O:
                                        0x00f6, // o:
                                        0x00df, // B (ss in german)
                                        0x00a5, // Y=
                                        0x00a4, // ox
                                        0x007c, // |
                                        0x00c5, // Ao
                                        0x00e5, // ao
                                        0x00d8, // O/
                                        0x00f8, // o/
                                        0x250c, // |-
                                        0x2510, // -|
                                        0x2514, // |_
                                        0x2518, // _|
                                };

                                PutChar(charmap[c - 0x20]);
                        }
                        else if(buff[i] == 0x94 && buff[i+1] == 0xae) // Erase Non-displayed [buffer] Memory
                        {
                                memset(m_buff, 0, sizeof(m_buff));
                        }
                        else if(buff[i] == 0x94 && buff[i+1] == 0x20) // Resume Caption Loading
                        {
                                memset(m_buff, 0, sizeof(m_buff));
                        }
                        else if(buff[i] == 0x94 && buff[i+1] == 0x2f) // End Of Caption
                        {
                                if(memcmp(m_disp, m_buff, sizeof(m_disp)) != 0)
                                {
                                        if(m_fEndOfCaption)
                                                SaveDisp(time + (i/2)*1000/30);
 
                                        m_fEndOfCaption = true;
                                        memcpy(m_disp, m_buff, sizeof(m_disp));
                                        m_time = time + (i/2)*1000/30;
                                }
                        }
                        else if(buff[i] == 0x94 && buff[i+1] == 0x2c) // Erase Displayed Memory
                        {
                                if(m_fEndOfCaption)
                                {
                                        m_fEndOfCaption = false;
                                        SaveDisp(time + (i/2)*1000/30);
                                }

                                memset(m_disp, 0, sizeof(m_disp));
                        }
                        else if(buff[i] == 0x97 && (buff[i+1] == 0xa1 || buff[i+1] == 0xa2 || buff[i+1] == 0x23)) // Tab Over
                        {
                                OffsetCursor(buff[i+1]&3, 0);
                        }
                        else if(buff[i] == 0x91 || buff[i] == 0x92 || buff[i] == 0x15 || buff[i] == 0x16 
                                || buff[i] == 0x97 || buff[i] == 0x10 || buff[i] == 0x13 || buff[i] == 0x94) // curpos, color, underline
                        {
                                int row = 0;
                                switch(buff[i])
                                {
                                default:
                                case 0x91: row = 0; break;
                                case 0x92: row = 2; break;
                                case 0x15: row = 4; break;
                                case 0x16: row = 6; break;
                                case 0x97: row = 8; break;
                                case 0x10: row = 10; break;
                                case 0x13: row = 12; break;
                                case 0x94: row = 14; break;
                                }
                                if(buff[i+1]&0x20) row++;

                                int col = buff[i+1]&0xe;
                                if(col == 0 || (col > 0 && !(buff[i+1]&0x10))) col = 0;
                                else col <<= 1;

                                MoveCursor(col, row);
                        }
                        else
                        {
                                int iiii = 0;
                        }

                        i++;
                }
        }
}

void CCDecoder::ExtractCC(BYTE* buff, int len, __int64 time)
{
        for(int i = 0; i < len-9; i++)
        {
                if(*(DWORD*)&buff[i] == 0xb2010000 && *(DWORD*)&buff[i+4] == 0xf8014343)
                {
                        i += 8;
                        int nBytes = buff[i++]&0x3f;
                        if(nBytes > 0)
                        {
                                nBytes = (nBytes+1)&~1;

                                BYTE* pData1 = new BYTE[nBytes];
                                BYTE* pData2 = new BYTE[nBytes];

                                if(pData1 && pData2)
                                {
                                        int nBytes1 = 0, nBytes2 = 0;

                                        for(int j = 0; j < nBytes && i < 0x800;)
                                        {
                                                if(buff[i++] == 0xff)
                                                {
                                                        pData1[nBytes1++] = buff[i++];
                                                        pData1[nBytes1++] = buff[i++];
                                                }
                                                else i+=2;
                                                
                                                j++;

                                                if(j >= nBytes) break;

                                                if(buff[i++] == 0xff)
                                                {
                                                        pData2[nBytes2++] = buff[i++];
                                                        pData2[nBytes2++] = buff[i++];
                                                }
                                                else i+=2;

                                                j++;
                                        }

                                        if(nBytes1 > 0)
                                                DecodeCC(pData1, nBytes1, time);

                                        if(nBytes2 > 0)
                                                DecodeCC(pData2, nBytes2, time);
                                }

                                if(pData1) delete [] pData1;
                                if(pData2) delete [] pData2;
                        }

                        break;
                }
        }
}

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