/***************************************************************************** * cc608.c : CC 608/708 subtitles decoder ***************************************************************************** * Copyright (C) 2007 Laurent Aimar * $Id$ * * Authors: Laurent Aimar < fenrir # via.ecp.fr> * * 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 of the License, 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 this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA. *****************************************************************************/ /***************************************************************************** * Preamble *****************************************************************************/ /* The EIA 608 decoder part has been initialy based on ccextractor (GPL) * and rewritten */ /* TODO: * On discontinuity reset the decoder state * Check parity * 708 decoding */ #ifdef HAVE_CONFIG_H # include "config.h" #endif #include #include #include #include #include #include #include #include #include #include #include #include #include #include /***************************************************************************** * Module descriptor. *****************************************************************************/ static int Open ( vlc_object_t * ); static void Close( vlc_object_t * ); vlc_module_begin(); set_shortname( N_("CC 608/708")); set_description( N_("Closed Captions decoder") ); set_capability( "decoder", 50 ); set_callbacks( Open, Close ); vlc_module_end(); /***************************************************************************** * Local prototypes *****************************************************************************/ typedef enum { EIA608_MODE_POPUP = 0, EIA608_MODE_ROLLUP_2 = 1, EIA608_MODE_ROLLUP_3 = 2, EIA608_MODE_ROLLUP_4 = 3, EIA608_MODE_PAINTON = 4, EIA608_MODE_TEXT = 5 } eia608_mode_t; typedef enum { EIA608_COLOR_WHITE = 0, EIA608_COLOR_GREEN = 1, EIA608_COLOR_BLUE = 2, EIA608_COLOR_CYAN = 3, EIA608_COLOR_RED = 4, EIA608_COLOR_YELLOW = 5, EIA608_COLOR_MAGENTA = 6, EIA608_COLOR_USERDEFINED = 7 } eia608_color_t; typedef enum { EIA608_FONT_REGULAR = 0x00, EIA608_FONT_ITALICS = 0x01, EIA608_FONT_UNDERLINE = 0x02, EIA608_FONT_UNDERLINE_ITALICS = EIA608_FONT_UNDERLINE | EIA608_FONT_ITALICS } eia608_font_t; #define EIA608_SCREEN_ROWS 15 #define EIA608_SCREEN_COLUMNS 32 struct eia608_screen // A CC buffer { uint8_t characters[EIA608_SCREEN_ROWS][EIA608_SCREEN_COLUMNS+1]; eia608_color_t colors[EIA608_SCREEN_ROWS][EIA608_SCREEN_COLUMNS+1]; eia608_font_t fonts[EIA608_SCREEN_ROWS][EIA608_SCREEN_COLUMNS+1]; // Extra char at the end for a 0 int row_used[EIA608_SCREEN_ROWS]; // Any data in row? }; typedef struct eia608_screen eia608_screen; typedef struct { /* Current channel (used to reject packet without channel information) */ int i_channel; /* */ int i_screen; /* Displayed screen */ eia608_screen screen[2]; struct { int i_row; int i_column; } cursor; /* */ eia608_mode_t mode; eia608_color_t color; eia608_font_t font; int i_row_rollup; /* Last command pair (used to reject duplicated command) */ struct { uint8_t d1; uint8_t d2; } last; } eia608_t; static void Eia608Init( eia608_t * ); static bool Eia608Parse( eia608_t *h, int i_channel_selected, const uint8_t data[2] ); static char *Eia608Text( eia608_t *h, bool b_html ); static void Eia608Exit( eia608_t * ); /* It will be enough up to 63 B frames, which is far too high for * broadcast environment */ #define CC_MAX_REORDER_SIZE (64) struct decoder_sys_t { int i; int i_block; block_t *pp_block[CC_MAX_REORDER_SIZE]; int i_field; int i_channel; eia608_t eia608; }; static subpicture_t *Decode( decoder_t *, block_t ** ); /***************************************************************************** * Open: probe the decoder and return score ***************************************************************************** * Tries to launch a decoder and return score so that the interface is able * to chose. *****************************************************************************/ static int Open( vlc_object_t *p_this ) { decoder_t *p_dec = (decoder_t*)p_this; decoder_sys_t *p_sys; int i_field; int i_channel; switch( p_dec->fmt_in.i_codec ) { case VLC_FOURCC('c','c','1',' '): i_field = 0; i_channel = 1; break; case VLC_FOURCC('c','c','2',' '): i_field = 0; i_channel = 2; break; case VLC_FOURCC('c','c','3',' '): i_field = 1; i_channel = 1; break; case VLC_FOURCC('c','c','4',' '): i_field = 1; i_channel = 2; break; default: return VLC_EGENERIC; } p_dec->pf_decode_sub = Decode; /* Allocate the memory needed to store the decoder's structure */ p_dec->p_sys = p_sys = malloc( sizeof( *p_sys ) ); if( p_sys == NULL ) return VLC_ENOMEM; /* init of p_sys */ memset( p_sys, 0, sizeof( *p_sys ) ); p_sys->i_block = 0; p_sys->i_field = i_field; p_sys->i_channel = i_channel; Eia608Init( &p_sys->eia608 ); return VLC_SUCCESS; } /**************************************************************************** * Decode: the whole thing **************************************************************************** * ****************************************************************************/ static void Push( decoder_t *, block_t * ); static block_t *Pop( decoder_t * ); static subpicture_t *Convert( decoder_t *, block_t * ); static subpicture_t *Decode( decoder_t *p_dec, block_t **pp_block ) { if( pp_block && *pp_block ) { Push( p_dec, *pp_block ); *pp_block = NULL; } for( ;; ) { block_t *p_block = Pop( p_dec ); if( !p_block ) break; subpicture_t *p_spu = Convert( p_dec, p_block ); if( p_spu ) return p_spu; } return NULL; } /***************************************************************************** * CloseDecoder: clean up the decoder *****************************************************************************/ static void Close( vlc_object_t *p_this ) { decoder_t *p_dec = (decoder_t *)p_this; decoder_sys_t *p_sys = p_dec->p_sys; int i; for( i = 0; i < p_sys->i_block; i++ ) block_Release( p_sys->pp_block[i] ); Eia608Exit( &p_sys->eia608 ); free( p_sys ); } /***************************************************************************** * *****************************************************************************/ static void Push( decoder_t *p_dec, block_t *p_block ) { decoder_sys_t *p_sys = p_dec->p_sys; if( p_sys->i_block >= CC_MAX_REORDER_SIZE ) { msg_Warn( p_dec, "Trashing a CC entry" ); memmove( &p_sys->pp_block[0], &p_sys->pp_block[1], sizeof(*p_sys->pp_block) * (CC_MAX_REORDER_SIZE-1) ); p_sys->i_block--; } p_sys->pp_block[p_sys->i_block++] = p_block; } static block_t *Pop( decoder_t *p_dec ) { decoder_sys_t *p_sys = p_dec->p_sys; block_t *p_block; int i_index; int i; /* XXX Cc captions data are OUT OF ORDER (because we receive them in the bitstream * order (ie ordered by video picture dts) instead of the display order. * We will simulate a simple IPB buffer scheme * and reorder with pts. * XXX it won't work with H264 which use non out of order B picture or MMCO */ /* Wait for a P and output all *previous* picture by pts order (for * hierarchical B frames) */ if( p_sys->i_block <= 1 || ( p_sys->pp_block[p_sys->i_block-1]->i_flags & BLOCK_FLAG_TYPE_B ) ) return NULL; p_block = p_sys->pp_block[i_index = 0]; if( p_block->i_pts > 0 ) { for( i = 1; i < p_sys->i_block-1; i++ ) { if( p_sys->pp_block[i]->i_pts > 0 && p_block->i_pts > 0 && p_sys->pp_block[i]->i_pts < p_block->i_pts ) p_block = p_sys->pp_block[i_index = i]; } } assert( i_index+1 < p_sys->i_block ); memmove( &p_sys->pp_block[i_index], &p_sys->pp_block[i_index+1], sizeof(*p_sys->pp_block) * ( p_sys->i_block - i_index - 1 ) ); p_sys->i_block--; return p_block; } static subpicture_t *Subtitle( decoder_t *p_dec, char *psz_subtitle, char *psz_html, mtime_t i_pts ) { //decoder_sys_t *p_sys = p_dec->p_sys; subpicture_t *p_spu = NULL; video_format_t fmt; /* We cannot display a subpicture with no date */ if( i_pts == 0 ) { msg_Warn( p_dec, "subtitle without a date" ); return NULL; } EnsureUTF8( psz_subtitle ); if( psz_html ) EnsureUTF8( psz_html ); /* Create the subpicture unit */ p_spu = p_dec->pf_spu_buffer_new( p_dec ); if( !p_spu ) { msg_Warn( p_dec, "can't get spu buffer" ); free( psz_subtitle ); free( psz_html ); return NULL; } /* Create a new subpicture region */ memset( &fmt, 0, sizeof(video_format_t) ); fmt.i_chroma = VLC_FOURCC('T','E','X','T'); fmt.i_aspect = 0; fmt.i_width = fmt.i_height = 0; fmt.i_x_offset = fmt.i_y_offset = 0; p_spu->p_region = p_spu->pf_create_region( VLC_OBJECT(p_dec), &fmt ); if( !p_spu->p_region ) { msg_Err( p_dec, "cannot allocate SPU region" ); free( psz_subtitle ); free( psz_html ); p_dec->pf_spu_buffer_del( p_dec, p_spu ); return NULL; } /* Decode and format the subpicture unit */ /* Normal text subs, easy markup */ p_spu->p_region->i_align = SUBPICTURE_ALIGN_BOTTOM;// | SUBPICTURE_ALIGN_LEFT;// | p_sys->i_align; p_spu->i_x = 0; //p_sys->i_align ? 20 : 0; p_spu->i_y = 10; p_spu->p_region->psz_text = psz_subtitle; p_spu->p_region->psz_html = psz_html; p_spu->i_start = i_pts; p_spu->i_stop = i_pts + 10000000; /* 10s max */ p_spu->b_ephemer = true; p_spu->b_absolute = false; return p_spu; } static subpicture_t *Convert( decoder_t *p_dec, block_t *p_block ) { decoder_sys_t *p_sys = p_dec->p_sys; const int64_t i_pts = p_block->i_pts; bool b_changed = false; /* TODO do the real decoding here */ while( p_block->i_buffer >= 3 ) { if( p_block->p_buffer[0] == p_sys->i_field ) b_changed |= Eia608Parse( &p_sys->eia608, p_sys->i_channel, &p_block->p_buffer[1] ); p_block->i_buffer -= 3; p_block->p_buffer += 3; } if( p_block ) block_Release( p_block ); if( b_changed ) { char *psz_subtitle = Eia608Text( &p_sys->eia608, false ); char *psz_html = NULL;//Eia608Text( &p_sys->eia608, true ); return Subtitle( p_dec, psz_subtitle, psz_html, i_pts ); } return NULL; } /***************************************************************************** * *****************************************************************************/ static const struct { eia608_color_t i_color; eia608_font_t i_font; int i_column; } pac2_attribs[]= { { EIA608_COLOR_WHITE, EIA608_FONT_REGULAR, 0 }, { EIA608_COLOR_WHITE, EIA608_FONT_UNDERLINE, 0 }, { EIA608_COLOR_GREEN, EIA608_FONT_REGULAR, 0 }, { EIA608_COLOR_GREEN, EIA608_FONT_UNDERLINE, 0 }, { EIA608_COLOR_BLUE, EIA608_FONT_REGULAR, 0 }, { EIA608_COLOR_BLUE, EIA608_FONT_UNDERLINE, 0 }, { EIA608_COLOR_CYAN, EIA608_FONT_REGULAR, 0 }, { EIA608_COLOR_CYAN, EIA608_FONT_UNDERLINE, 0 }, { EIA608_COLOR_RED, EIA608_FONT_REGULAR, 0 }, { EIA608_COLOR_RED, EIA608_FONT_UNDERLINE, 0 }, { EIA608_COLOR_YELLOW, EIA608_FONT_REGULAR, 0 }, { EIA608_COLOR_YELLOW, EIA608_FONT_UNDERLINE, 0 }, { EIA608_COLOR_MAGENTA, EIA608_FONT_REGULAR, 0 }, { EIA608_COLOR_MAGENTA, EIA608_FONT_UNDERLINE, 0 }, { EIA608_COLOR_WHITE, EIA608_FONT_ITALICS, 0 }, { EIA608_COLOR_WHITE, EIA608_FONT_UNDERLINE_ITALICS, 0 }, { EIA608_COLOR_WHITE, EIA608_FONT_REGULAR, 0 }, { EIA608_COLOR_WHITE, EIA608_FONT_UNDERLINE, 0 }, { EIA608_COLOR_WHITE, EIA608_FONT_REGULAR, 4 }, { EIA608_COLOR_WHITE, EIA608_FONT_UNDERLINE, 4 }, { EIA608_COLOR_WHITE, EIA608_FONT_REGULAR, 8 }, { EIA608_COLOR_WHITE, EIA608_FONT_UNDERLINE, 8 }, { EIA608_COLOR_WHITE, EIA608_FONT_REGULAR, 12 }, { EIA608_COLOR_WHITE, EIA608_FONT_UNDERLINE, 12 }, { EIA608_COLOR_WHITE, EIA608_FONT_REGULAR, 16 }, { EIA608_COLOR_WHITE, EIA608_FONT_UNDERLINE, 16 }, { EIA608_COLOR_WHITE, EIA608_FONT_REGULAR, 20 }, { EIA608_COLOR_WHITE, EIA608_FONT_UNDERLINE, 20 }, { EIA608_COLOR_WHITE, EIA608_FONT_REGULAR, 24 }, { EIA608_COLOR_WHITE, EIA608_FONT_UNDERLINE, 24 }, { EIA608_COLOR_WHITE, EIA608_FONT_REGULAR, 28 }, { EIA608_COLOR_WHITE, EIA608_FONT_UNDERLINE, 28 } , }; #define EIA608_COLOR_DEFAULT EIA608_COLOR_WHITE static void Eia608Cursor( eia608_t *h, int dx ) { h->cursor.i_column += dx; if( h->cursor.i_column < 0 ) h->cursor.i_column = 0; else if( h->cursor.i_column > EIA608_SCREEN_COLUMNS-1 ) h->cursor.i_column = EIA608_SCREEN_COLUMNS-1; } static void Eia608ClearScreenRowX( eia608_t *h, int i_screen, int i_row, int x ) { eia608_screen *screen = &h->screen[i_screen]; int i; if( x == 0 ) { screen->row_used[i_row] = false; } else { screen->row_used[i_row] = false; for( i = 0; i < x; i++ ) { if( screen->characters[i_row][i] != ' ' || screen->colors[i_row][i] != EIA608_COLOR_DEFAULT || screen->fonts[i_row][i] != EIA608_FONT_REGULAR ) { screen->row_used[i_row] = true; break; } } } for( ; x < EIA608_SCREEN_COLUMNS+1; x++ ) { screen->characters[i_row][x] = x < EIA608_SCREEN_COLUMNS ? ' ' : '\0'; screen->colors[i_row][x] = EIA608_COLOR_DEFAULT; screen->fonts[i_row][x] = EIA608_FONT_REGULAR; } } static void Eia608ClearScreenRow( eia608_t *h, int i_screen, int i_row ) { Eia608ClearScreenRowX( h, i_screen, i_row, 0 ); } static void Eia608ClearScreen( eia608_t *h, int i_screen ) { int i; for( i = 0; i < EIA608_SCREEN_ROWS; i++ ) Eia608ClearScreenRow( h, i_screen, i ); } static int Eia608GetWritingScreenIndex( eia608_t *h ) { switch( h->mode ) { case EIA608_MODE_POPUP: // Non displayed screen return 1 - h->i_screen; case EIA608_MODE_ROLLUP_2: // Displayed screen case EIA608_MODE_ROLLUP_3: case EIA608_MODE_ROLLUP_4: case EIA608_MODE_PAINTON: return h->i_screen; default: /* It cannot happen, else it is a bug */ assert( 0 ); return 0; } } static void Eia608EraseScreen( eia608_t *h, bool b_displayed ) { Eia608ClearScreen( h, b_displayed ? h->i_screen : (1-h->i_screen) ); } static void Eia608Write( eia608_t *h, const uint8_t c ) { const int i_row = h->cursor.i_row; const int i_column = h->cursor.i_column; eia608_screen *screen; if( h->mode == EIA608_MODE_TEXT ) return; screen = &h->screen[Eia608GetWritingScreenIndex( h )]; screen->characters[i_row][i_column] = c; screen->colors[i_row][i_column] = h->color; screen->fonts[i_row][i_column] = h->font; screen->row_used[i_row] = true; Eia608Cursor( h, 1 ); } static void Eia608Erase( eia608_t *h ) { const int i_row = h->cursor.i_row; const int i_column = h->cursor.i_column - 1; eia608_screen *screen; if( h->mode == EIA608_MODE_TEXT ) return; if( i_column < 0 ) return; screen = &h->screen[Eia608GetWritingScreenIndex( h )]; /* FIXME do we need to reset row_used/colors/font ? */ screen->characters[i_row][i_column] = ' '; Eia608Cursor( h, -1 ); } static void Eia608EraseToEndOfRow( eia608_t *h ) { if( h->mode == EIA608_MODE_TEXT ) return; Eia608ClearScreenRowX( h, Eia608GetWritingScreenIndex( h ), h->cursor.i_row, h->cursor.i_column ); } static void Eia608RollUp( eia608_t *h ) { const int i_screen = Eia608GetWritingScreenIndex( h ); eia608_screen *screen = &h->screen[i_screen]; int keep_lines; int i; /* Window size */ if( h->mode == EIA608_MODE_ROLLUP_2 ) keep_lines = 2; else if( h->mode == EIA608_MODE_ROLLUP_3 ) keep_lines = 3; else if( h->mode == EIA608_MODE_ROLLUP_4 ) keep_lines = 4; else return; /* Reset the cursor */ h->cursor.i_column = 0; /* Erase lines above our window */ for( i = 0; i < h->cursor.i_row - keep_lines; i++ ) Eia608ClearScreenRow( h, i_screen, i ); /* Move up */ for( i = 0; i < keep_lines-1; i++ ) { const int i_row = h->cursor.i_row - keep_lines + i + 1; if( i_row < 0 ) continue; assert( i_row+1 < EIA608_SCREEN_ROWS ); memcpy( screen->characters[i_row], screen->characters[i_row+1], sizeof(*screen->characters) ); memcpy( screen->colors[i_row], screen->colors[i_row+1], sizeof(*screen->colors) ); memcpy( screen->fonts[i_row], screen->fonts[i_row+1], sizeof(*screen->fonts) ); screen->row_used[i_row] = screen->row_used[i_row+1]; } /* Reset current row */ Eia608ClearScreenRow( h, i_screen, h->cursor.i_row ); } static void Eia608ParseChannel( eia608_t *h, uint8_t d1 ) { if( d1 == 0x14 ) h->i_channel = 1; else if( d1 == 0x1c ) h->i_channel = 2; else if( ( d1 >= 0x01 && d1 <= 0x0f ) || d1 == 0x15 ) h->i_channel = 3; else if( d1 == 0x1d ) h->i_channel = 4; } static bool Eia608ParseTextAttribute( eia608_t *h, uint8_t d2 ) { const int i_index = d2 - 0x20; assert( d2 >= 0x20 && d2 <= 0x2f ); h->color = pac2_attribs[i_index].i_color; h->font = pac2_attribs[i_index].i_font; Eia608Cursor( h, 1 ); return false; } static bool Eia608ParseSingle( eia608_t *h, const uint8_t dx ) { assert( dx >= 0x20 ); Eia608Write( h, dx ); return true; } static bool Eia608ParseDouble( eia608_t *h, uint8_t d2 ) { assert( d2 >= 0x30 && d2 <= 0x3f ); Eia608Write( h, d2 + 0x50 ); /* We use charaters 0x80...0x8f */ return true; } static bool Eia608ParseExtended( eia608_t *h, uint8_t d1, uint8_t d2 ) { assert( d2 >= 0x20 && d2 <= 0x3f ); assert( d1 == 0x12 || d1 == 0x13 ); if( d1 == 0x12 ) d2 += 0x70; /* We use charaters 0x90-0xaf */ else d2 += 0x90; /* We use charaters 0xb0-0xcf */ /* The extended characters replace the previous one with a more * advanced one */ Eia608Cursor( h, -1 ); Eia608Write( h, d2 ); return true; } static bool Eia608ParseCommand0x14( eia608_t *h, uint8_t d2 ) { bool b_changed = false; switch( d2 ) { case 0x20: /* Resume caption loading */ h->mode = EIA608_MODE_POPUP; break; case 0x21: /* Backspace */ Eia608Erase( h ); b_changed = true; break; case 0x22: /* Reserved */ case 0x23: break; case 0x24: /* Delete to end of row */ Eia608EraseToEndOfRow( h ); break; case 0x25: /* Rollup 2 */ case 0x26: /* Rollup 3 */ case 0x27: /* Rollup 4 */ if( h->mode == EIA608_MODE_POPUP || h->mode == EIA608_MODE_PAINTON ) { Eia608EraseScreen( h, true ); Eia608EraseScreen( h, false ); b_changed = true; } if( d2 == 0x25 ) h->mode = EIA608_MODE_ROLLUP_2; else if( d2 == 0x26 ) h->mode = EIA608_MODE_ROLLUP_3; else h->mode = EIA608_MODE_ROLLUP_4; h->cursor.i_column = 0; h->cursor.i_row = h->i_row_rollup; break; case 0x28: /* Flash on */ /* TODO */ break; case 0x29: /* Resume direct captionning */ h->mode = EIA608_MODE_PAINTON; break; case 0x2a: /* Text restart */ /* TODO */ break; case 0x2b: /* Resume text display */ h->mode = EIA608_MODE_TEXT; break; case 0x2c: /* Erase displayed memory */ Eia608EraseScreen( h, true ); b_changed = true; break; case 0x2d: /* Carriage return */ Eia608RollUp(h); b_changed = true; break; case 0x2e: /* Erase non displayed memory */ Eia608EraseScreen( h, false ); break; case 0x2f: /* End of caption (flip screen if not paint on) */ if( h->mode != EIA608_MODE_PAINTON ) h->i_screen = 1 - h->i_screen; h->mode = EIA608_MODE_POPUP; h->cursor.i_column = 0; h->cursor.i_row = 0; h->color = EIA608_COLOR_DEFAULT; h->font = EIA608_FONT_REGULAR; b_changed = true; break; } return b_changed; } static bool Eia608ParseCommand0x17( eia608_t *h, uint8_t d2 ) { switch( d2 ) { case 0x21: /* Tab offset 1 */ Eia608Cursor( h, 1 ); break; case 0x22: /* Tab offset 2 */ Eia608Cursor( h, 2 ); break; case 0x23: /* Tab offset 3 */ Eia608Cursor( h, 3 ); break; } return false; } static bool Eia608ParsePac( eia608_t *h, uint8_t d1, uint8_t d2 ) { static const int pi_row[] = { 11, -1, 1, 2, 3, 4, 12, 13, 14, 15, 5, 6, 7, 8, 9, 10 }; const int i_row_index = ( (d1<<1) & 0x0e) | ( (d2>>5) & 0x01 ); assert( d2 >= 0x40 && d2 <= 0x7f ); if( pi_row[i_row_index] <= 0 ) return false; /* Row */ if( h->mode != EIA608_MODE_TEXT ) h->cursor.i_row = pi_row[i_row_index] - 1; h->i_row_rollup = pi_row[i_row_index] - 1; /* Column */ if( d2 >= 0x60 ) d2 -= 0x60; else if( d2 >= 0x40 ) d2 -= 0x40; h->cursor.i_column = pac2_attribs[d2].i_column; return false; } static bool Eia608ParseData( eia608_t *h, uint8_t d1, uint8_t d2 ) { bool b_changed = false; if( d1 >= 0x18 && d1 <= 0x1f ) d1 -= 8; #define ON( d2min, d2max, cmd ) do { if( d2 >= d2min && d2 <= d2max ) b_changed = cmd; } while(0) switch( d1 ) { case 0x11: ON( 0x20, 0x2f, Eia608ParseTextAttribute( h, d2 ) ); ON( 0x30, 0x3f, Eia608ParseDouble( h, d2 ) ); break; case 0x12: case 0x13: ON( 0x20, 0x3f, Eia608ParseExtended( h, d1, d2 ) ); break; case 0x14: case 0x15: ON( 0x20, 0x2f, Eia608ParseCommand0x14( h, d2 ) ); break; case 0x17: ON( 0x21, 0x22, Eia608ParseCommand0x17( h, d2 ) ); ON( 0x2e, 0x2f, Eia608ParseTextAttribute( h, d2 ) ); break; } if( d1 == 0x10 ) ON( 0x40, 0x5f, Eia608ParsePac( h, d1, d2 ) ); else if( d1 >= 0x11 && d1 <= 0x17 ) ON( 0x40, 0x7f, Eia608ParsePac( h, d1, d2 ) ); #undef ON if( d1 >= 0x20 ) { b_changed = Eia608ParseSingle( h, d1 ); if( d2 >= 0x20 ) b_changed |= Eia608ParseSingle( h, d2 ); } return b_changed; } static void Eia608TextUtf8( char *psz_utf8, uint8_t c ) // Returns number of bytes used { #define E1(c,u) { c, { u, '\0' } } #define E2(c,u1,u2) { c, { u1, u2, '\0' } } #define E3(c,u1,u2,u3) { c, { u1, u2, u3, '\0' } } static const struct { uint8_t c; char utf8[3+1]; } c2utf8[] = { // Regular line-21 character set, mostly ASCII except these exceptions E2( 0x2a, 0xc3,0xa1), // lowercase a, acute accent E2( 0x5c, 0xc3,0xa9), // lowercase e, acute accent E2( 0x5e, 0xc3,0xad), // lowercase i, acute accent E2( 0x5f, 0xc3,0xb3), // lowercase o, acute accent E2( 0x60, 0xc3,0xba), // lowercase u, acute accent E2( 0x7b, 0xc3,0xa7), // lowercase c with cedilla E2( 0x7c, 0xc3,0xb7), // division symbol E2( 0x7d, 0xc3,0x91), // uppercase N tilde E2( 0x7e, 0xc3,0xb1), // lowercase n tilde // THIS BLOCK INCLUDES THE 16 EXTENDED (TWO-BYTE) LINE 21 CHARACTERS // THAT COME FROM HI BYTE=0x11 AND LOW BETWEEN 0x30 AND 0x3F E2( 0x80, 0xc2,0xae), // Registered symbol (R) E2( 0x81, 0xc2,0xb0), // degree sign E2( 0x82, 0xc2,0xbd), // 1/2 symbol E2( 0x83, 0xc2,0xbf), // Inverted (open) question mark E3( 0x84, 0xe2,0x84,0xa2), // Trademark symbol (TM) E2( 0x85, 0xc2,0xa2), // Cents symbol E2( 0x86, 0xc2,0xa3), // Pounds sterling E3( 0x87, 0xe2,0x99,0xaa), // Music note E2( 0x88, 0xc3,0xa0), // lowercase a, grave accent E1( 0x89, 0x20), // transparent space, we make it regular E2( 0x8a, 0xc3,0xa8), // lowercase e, grave accent E2( 0x8b, 0xc3,0xa2), // lowercase a, circumflex accent E2( 0x8c, 0xc3,0xaa), // lowercase e, circumflex accent E2( 0x8d, 0xc3,0xae), // lowercase i, circumflex accent E2( 0x8e, 0xc3,0xb4), // lowercase o, circumflex accent E2( 0x8f, 0xc3,0xbb), // lowercase u, circumflex accent // THIS BLOCK INCLUDES THE 32 EXTENDED (TWO-BYTE) LINE 21 CHARACTERS // THAT COME FROM HI BYTE=0x12 AND LOW BETWEEN 0x20 AND 0x3F E2( 0x90, 0xc3,0x81), // capital letter A with acute E2( 0x91, 0xc3,0x89), // capital letter E with acute E2( 0x92, 0xc3,0x93), // capital letter O with acute E2( 0x93, 0xc3,0x9a), // capital letter U with acute E2( 0x94, 0xc3,0x9c), // capital letter U with diaresis E2( 0x95, 0xc3,0xbc), // lowercase letter U with diaeresis E1( 0x96, 0x27), // apostrophe E2( 0x97, 0xc1,0xa1), // inverted exclamation mark E1( 0x98, 0x2a), // asterisk E1( 0x99, 0x27), // apostrophe (yes, duped). See CCADI source code. E1( 0x9a, 0x2d), // hyphen-minus E2( 0x9b, 0xc2,0xa9), // copyright sign E3( 0x9c, 0xe2,0x84,0xa0), // Service mark E1( 0x9d, 0x2e), // Full stop (.) E1( 0x9e, 0x22), // Quoatation mark E1( 0x9f, 0x22), // Quoatation mark E2( 0xa0, 0xc3,0x80), // uppercase A, grave accent E2( 0xa1, 0xc3,0x82), // uppercase A, circumflex E2( 0xa2, 0xc3,0x87), // uppercase C with cedilla E2( 0xa3, 0xc3,0x88), // uppercase E, grave accent E2( 0xa4, 0xc3,0x8a), // uppercase E, circumflex E2( 0xa5, 0xc3,0x8b), // capital letter E with diaresis E2( 0xa6, 0xc3,0xab), // lowercase letter e with diaresis E2( 0xa7, 0xc3,0x8e), // uppercase I, circumflex E2( 0xa8, 0xc3,0x8f), // uppercase I, with diaresis E2( 0xa9, 0xc3,0xaf), // lowercase i, with diaresis E2( 0xaa, 0xc3,0x94), // uppercase O, circumflex E2( 0xab, 0xc3,0x99), // uppercase U, grave accent E2( 0xac, 0xc3,0xb9), // lowercase u, grave accent E2( 0xad, 0xc3,0x9b), // uppercase U, circumflex E2( 0xae, 0xc2,0xab), // LEFT-POINTING DOUBLE ANGLE QUOTATION MARK E2( 0xaf, 0xc2,0xbb), // RIGHT-POINTING DOUBLE ANGLE QUOTATION MARK // THIS BLOCK INCLUDES THE 32 EXTENDED (TWO-BYTE) LINE 21 CHARACTERS // THAT COME FROM HI BYTE=0x13 AND LOW BETWEEN 0x20 AND 0x3F E2( 0xb0, 0xc3,0x83), // Uppercase A, tilde E2( 0xb1, 0xc3,0xa3), // Lowercase a, tilde E2( 0xb2, 0xc3,0x8d), // Uppercase I, acute accent E2( 0xb3, 0xc3,0x8c), // Uppercase I, grave accent E2( 0xb4, 0xc3,0xac), // Lowercase i, grave accent E2( 0xb5, 0xc3,0x92), // Uppercase O, grave accent E2( 0xb6, 0xc3,0xb2), // Lowercase o, grave accent E2( 0xb7, 0xc3,0x95), // Uppercase O, tilde E2( 0xb8, 0xc3,0xb5), // Lowercase o, tilde E1( 0xb9, 0x7b), // Open curly brace E1( 0xba, 0x7d), // Closing curly brace E1( 0xbb, 0x5c), // Backslash E1( 0xbc, 0x5e), // Caret E1( 0xbd, 0x5f), // Underscore E2( 0xbe, 0xc2,0xa6), // Pipe (broken bar) E1( 0xbf, 0x7e), // Tilde (utf8 code unsure) E2( 0xc0, 0xc3,0x84), // Uppercase A, umlaut E2( 0xc1, 0xc3,0xa4), // Lowercase A, umlaut E2( 0xc2, 0xc3,0x96), // Uppercase O, umlaut E2( 0xc3, 0xc3,0xb6), // Lowercase o, umlaut E2( 0xc4, 0xc3,0x9f), // Esszett (sharp S) E2( 0xc5, 0xc2,0xa5), // Yen symbol E2( 0xc6, 0xc2,0xa4), // Currency symbol E1( 0xc7, 0x7c), // Vertical bar E2( 0xc8, 0xc3,0x85), // Uppercase A, ring E2( 0xc9, 0xc3,0xa5), // Lowercase A, ring E2( 0xca, 0xc3,0x98), // Uppercase O, slash E2( 0xcb, 0xc3,0xb8), // Lowercase o, slash E3( 0xcc, 0xe2,0x8c,0x9c), // Upper left corner E3( 0xcd, 0xe2,0x8c,0x9d), // Upper right corner E3( 0xce, 0xe2,0x8c,0x9e), // Lower left corner E3( 0xcf, 0xe2,0x8c,0x9f), // Lower right corner E1(0,0) }; #undef E3 #undef E2 #undef E1 static const int i_c2utf8 = sizeof(c2utf8)/sizeof(*c2utf8); int i; for( i = 0; i < i_c2utf8; i++ ) { if( c2utf8[i].c == c ) break; } if( i >= i_c2utf8 ) { psz_utf8[0] = c < 0x80 ? c : '?'; /* Normal : Unsupported */ psz_utf8[1] = '\0'; } else { strcpy( psz_utf8, c2utf8[i].utf8 ); } } static void Eia608Strlcat( char *d, const char *s, int i_max ) { if( i_max > 1 ) strncat( d, s, i_max-1 - strnlen(d, i_max-1)); if( i_max > 0 ) d[i_max-1] = '\0'; } static void Eia608TextLine( struct eia608_screen *screen, char *psz_text, int i_text_max, int i_row, bool b_html ) { const uint8_t *p_char = screen->characters[i_row]; const eia608_color_t *p_color = screen->colors[i_row]; const eia608_font_t *p_font = screen->fonts[i_row]; int i_start; int i_end; int x; eia608_color_t last_color = EIA608_COLOR_DEFAULT; bool b_last_italics = false; bool b_last_underline = false; /* Search the start */ i_start = 0; while( i_start < EIA608_SCREEN_COLUMNS-1 && p_char[i_start] == ' ' ) i_start++; /* Search the end */ i_end = EIA608_SCREEN_COLUMNS-1; while( i_end > i_start && p_char[i_end] == ' ' ) i_end--; /* */ #define CAT(t) Eia608Strlcat( psz_text, t, i_text_max ) for( x = i_start; x <= i_end; x++ ) { eia608_color_t color = p_color[x]; bool b_italics = p_font[x] & EIA608_FONT_ITALICS; bool b_underline = p_font[x] & EIA608_FONT_UNDERLINE; char utf8[4]; /* */ if( b_html ) { bool b_close_color, b_close_italics, b_close_underline; /* We create the tags font / i / u in that orders */ b_close_color = color != last_color && last_color != EIA608_COLOR_DEFAULT; b_close_italics = !b_italics && b_last_italics; b_close_underline = !b_underline && b_last_underline; /* Be sure to create valid html */ b_close_italics |= b_last_italics && b_close_color; b_close_underline = b_last_underline && ( b_close_italics || b_close_color ); if( b_close_underline ) CAT( "" ); if( b_close_italics ) CAT( "" ); if( b_close_color ) CAT( "" ); if( color != EIA608_COLOR_DEFAULT && color != last_color) { static const char *ppsz_color[] = { "#ffffff", // white "#00ff00", // green "#0000ff", // blue "#00ffff", // cyan "#ff0000", // red "#ffff00", // yellow "#ff00ff", // magenta "#ffffff", // user defined XXX we use white }; CAT( "" ); } if( ( b_close_italics && b_italics ) || ( b_italics && !b_last_italics ) ) CAT( "" ); if( ( b_close_underline && b_underline ) || ( b_underline && !b_last_underline ) ) CAT( "" ); } /* */ Eia608TextUtf8( utf8, p_char[x] ); CAT( utf8 ); /* */ b_last_underline = b_underline; b_last_italics = b_italics; last_color = color; } if( b_html ) { if( b_last_underline ) CAT( "" ); if( b_last_italics ) CAT( "" ); if( last_color != EIA608_COLOR_DEFAULT ) CAT( "" ); } #undef CAT } /* */ static void Eia608Init( eia608_t *h ) { memset( h, 0, sizeof(*h) ); /* */ h->i_channel = -1; h->i_screen = 0; Eia608ClearScreen( h, 0 ); Eia608ClearScreen( h, 1 ); /* Cursor for writing text */ h->cursor.i_column = 0; h->cursor.i_row = 0; h->last.d1 = 0x00; h->last.d2 = 0x00; h->mode = EIA608_MODE_POPUP; h->color = EIA608_COLOR_DEFAULT; h->font = EIA608_FONT_REGULAR; h->i_row_rollup = EIA608_SCREEN_ROWS-1; } static bool Eia608Parse( eia608_t *h, int i_channel_selected, const uint8_t data[2] ) { const uint8_t d1 = data[0] & 0x7f; /* Removed parity bit TODO we might want to check them */ const uint8_t d2 = data[1] & 0x7f; bool b_screen_changed = false; if( d1 == 0 && d2 == 0 ) return false; /* Ignore padding */ Eia608ParseChannel( h, d1 ); if( h->i_channel != i_channel_selected ) return false; //fprintf( stderr, "CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC %x %x\n", data[0], data[1] ); if( d1 >= 0x10 ) { if( d1 >= 0x20 || d1 != h->last.d1 || d2 != h->last.d2 ) /* Command codes can be repeated */ b_screen_changed = Eia608ParseData( h, d1,d2 ); h->last.d1 = d1; h->last.d2 = d2; } else if( ( d1 >= 0x01 && d1 <= 0x0E ) || d1 == 0x0F ) { /* XDS block / End of XDS block */ } return b_screen_changed; } static char *Eia608Text( eia608_t *h, bool b_html ) { const int i_size = EIA608_SCREEN_ROWS * 3 * EIA608_SCREEN_COLUMNS+1; struct eia608_screen *screen = &h->screen[h->i_screen]; bool b_first = true; char *psz; int i; /* We allocate a buffer big enough for normal case */ psz = malloc( i_size ); if( !psz ) return NULL; *psz = '\0'; if( b_html ) Eia608Strlcat( psz, "", i_size ); for( i = 0; i < EIA608_SCREEN_ROWS; i++ ) { if( !screen->row_used[i] ) continue; if( !b_first ) Eia608Strlcat( psz, b_html ? "
" : "\n", i_size ); b_first = false; Eia608TextLine( screen, psz, i_size, i, b_html ); } if( b_html ) Eia608Strlcat( psz, "
", i_size ); return psz; } static void Eia608Exit( eia608_t *h ) { }