cc.c
资源名称:vlc-1.0.5.zip [点击查看]
上传用户:kjfoods
上传日期:2020-07-06
资源大小:29949k
文件大小:36k
源码类别:
midi
开发平台:
Unix_Linux
- /*****************************************************************************
- * cc608.c : CC 608/708 subtitles decoder
- *****************************************************************************
- * Copyright (C) 2007 Laurent Aimar
- * $Id: 419d576626823f8374ed551d73c73be5bb465683 $
- *
- * 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 <vlc_common.h>
- #include <vlc_plugin.h>
- #include <vlc_vout.h>
- #include <vlc_codec.h>
- #include <vlc_input.h>
- #include <vlc_osd.h>
- #include <vlc_filter.h>
- #include <vlc_image.h>
- #include <vlc_charset.h>
- #include <vlc_stream.h>
- #include <vlc_xml.h>
- #include <errno.h>
- #include <string.h>
- #include <assert.h>
- /*****************************************************************************
- * 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 = calloc( 1, sizeof( *p_sys ) );
- if( p_sys == NULL )
- return VLC_ENOMEM;
- /* init of p_sys */
- p_sys->i_field = i_field;
- p_sys->i_channel = i_channel;
- Eia608Init( &p_sys->eia608 );
- p_dec->fmt_out.i_cat = SPU_ES;
- p_dec->fmt_out.i_codec = VLC_FOURCC('T','E','X','T');
- 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 = decoder_NewSubpicture( 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 = subpicture_region_New( &fmt );
- if( !p_spu->p_region )
- {
- msg_Err( p_dec, "cannot allocate SPU region" );
- free( psz_subtitle );
- free( psz_html );
- decoder_DeleteSubpicture( 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->p_region->i_x = 0; //p_sys->i_align ? 20 : 0;
- p_spu->p_region->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 )
- {
- assert( 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 ? ' ' : ' ';
- 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 d[2] )
- {
- /* Check odd parity */
- static const int p4[16] = {
- 0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0
- };
- if( p4[d[0] & 0xf] == p4[d[0] >> 4] ||
- p4[d[1] & 0xf] == p4[ d[1] >> 4] )
- {
- h->i_channel = -1;
- return;
- }
- /* */
- const int d1 = d[0] & 0x7f;
- const int d2 = d[1] & 0x7f;
- if( d1 == 0x14 )
- h->i_channel = 1;
- else if( d1 == 0x1c )
- h->i_channel = 2;
- else if( 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, ' ' } }
- #define E2(c,u1,u2) { c, { u1, u2, ' ' } }
- #define E3(c,u1,u2,u3) { c, { u1, u2, u3, ' ' } }
- 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] = ' ';
- }
- 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] = ' ';
- }
- 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( "</u>" );
- if( b_close_italics )
- CAT( "</i>" );
- if( b_close_color )
- CAT( "</font>" );
- 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( "<font color=" );
- CAT( ppsz_color[color] );
- CAT( ">" );
- }
- if( ( b_close_italics && b_italics ) || ( b_italics && !b_last_italics ) )
- CAT( "<i>" );
- if( ( b_close_underline && b_underline ) || ( b_underline && !b_last_underline ) )
- CAT( "<u>" );
- }
- /* */
- 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( "</u>" );
- if( b_last_italics )
- CAT( "</i>" );
- if( last_color != EIA608_COLOR_DEFAULT )
- CAT( "</font>" );
- }
- #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 */
- const uint8_t d2 = data[1] & 0x7f;
- bool b_screen_changed = false;
- if( d1 == 0 && d2 == 0 )
- return false; /* Ignore padding (parity check are sometimes invalid on them) */
- Eia608ParseChannel( h, data );
- if( h->i_channel != i_channel_selected )
- return false;
- //fprintf( stderr, "CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC %x %xn", 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 = ' ';
- if( b_html )
- Eia608Strlcat( psz, "<text>", i_size );
- for( i = 0; i < EIA608_SCREEN_ROWS; i++ )
- {
- if( !screen->row_used[i] )
- continue;
- if( !b_first )
- Eia608Strlcat( psz, b_html ? "<br />" : "n", i_size );
- b_first = false;
- Eia608TextLine( screen, psz, i_size, i, b_html );
- }
- if( b_html )
- Eia608Strlcat( psz, "</text>", i_size );
- return psz;
- }
- static void Eia608Exit( eia608_t *h )
- {
- }