--- /dev/null
+/*****************************************************************************
+ * cc608.c : CC 608/708 subtitles decoder
+ *****************************************************************************
+ * Copyright (C) 2007 Laurent Aimar
+ * $Id: subsdec.c 22151 2007-09-18 16:20:49Z courmisch $
+ *
+ * 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
+ */
+
+#include <vlc/vlc.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>
+
+/*****************************************************************************
+ * Module descriptor.
+ *****************************************************************************/
+static int Open ( vlc_object_t * );
+static void Close( vlc_object_t * );
+
+vlc_module_begin();
+ set_shortname( _("CC 608/708"));
+ set_description( _("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 vlc_bool_t Eia608Parse( eia608_t *h, int i_channel_selected, const uint8_t data[2] );
+static char *Eia608Text( eia608_t *h, vlc_bool_t 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];
+ block_t *p_current;
+
+ 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 )
+ {
+ msg_Err( p_dec, "out of memory" );
+ return VLC_ENOMEM;
+ }
+
+ /* init of p_sys */
+ memset( p_sys, 0, sizeof( *p_sys ) );
+ p_sys->i_block = 0;
+ p_sys->p_current = NULL;
+
+ 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 )
+{
+ decoder_sys_t *p_sys = p_dec->p_sys;
+
+ if( pp_block && *pp_block )
+ {
+ Push( p_dec, *pp_block );
+ *pp_block = NULL;
+ }
+
+ for( ;; )
+ {
+ block_t *p_block;
+
+ p_block = p_sys->p_current;
+ if( !p_block )
+ 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 );
+ if( psz_html )
+ free( psz_html );
+ return NULL;
+ }
+
+ p_spu->b_pausable = VLC_TRUE;
+
+ /* 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 );
+ if( psz_html )
+ 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 = VLC_TRUE;
+ p_spu->b_absolute = VLC_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;
+ vlc_bool_t b_changed = VLC_FALSE;
+
+ p_sys->p_current = p_block;
+
+ /* TODO do the real decoding here */
+ while( p_block && 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->i_buffer <= 0 )
+ {
+ block_Release( p_block );
+ p_sys->p_current = p_block = NULL;
+ }
+ }
+ static int64_t i_last = 0;
+ if( b_changed )//&& i_pts - i_last > 100*1000 )
+ {
+ char *psz_subtitle = Eia608Text( &p_sys->eia608, VLC_FALSE );
+ char *psz_html = NULL;//Eia608Text( &p_sys->eia608, VLC_TRUE );
+ i_last = i_pts;
+ 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] = VLC_FALSE;
+ }
+ else
+ {
+ screen->row_used[i_row] = VLC_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] = VLC_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, vlc_bool_t 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] = VLC_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 vlc_bool_t 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 VLC_FALSE;
+}
+static vlc_bool_t Eia608ParseSingle( eia608_t *h, const uint8_t dx )
+{
+ assert( dx >= 0x20 );
+ Eia608Write( h, dx );
+ return VLC_TRUE;
+}
+static vlc_bool_t Eia608ParseDouble( eia608_t *h, uint8_t d2 )
+{
+ assert( d2 >= 0x30 && d2 <= 0x3f );
+ Eia608Write( h, d2 + 0x50 ); /* We use charaters 0x80...0x8f */
+ return VLC_TRUE;
+}
+static vlc_bool_t 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 VLC_TRUE;
+}
+static vlc_bool_t Eia608ParseCommand0x14( eia608_t *h, uint8_t d2 )
+{
+ vlc_bool_t b_changed = VLC_FALSE;
+
+ switch( d2 )
+ {
+ case 0x20: /* Resume caption loading */
+ h->mode = EIA608_MODE_POPUP;
+ break;
+ case 0x21: /* Backspace */
+ Eia608Erase( h );
+ b_changed = VLC_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, VLC_TRUE );
+ Eia608EraseScreen( h, VLC_FALSE );
+ b_changed = VLC_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, VLC_TRUE );
+ b_changed = VLC_TRUE;
+ break;
+ case 0x2d: /* Carriage return */
+ Eia608RollUp(h);
+ b_changed = VLC_TRUE;
+ break;
+ case 0x2e: /* Erase non displayed memory */
+ Eia608EraseScreen( h, VLC_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 = VLC_TRUE;
+ break;
+ }
+ return b_changed;
+}
+static vlc_bool_t 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 VLC_FALSE;
+}
+static vlc_bool_t 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 VLC_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 VLC_FALSE;
+}
+
+static vlc_bool_t Eia608ParseData( eia608_t *h, uint8_t d1, uint8_t d2 )
+{
+ vlc_bool_t b_changed = VLC_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, vlc_bool_t 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;
+ vlc_bool_t b_last_italics = VLC_FALSE;
+ vlc_bool_t b_last_underline = VLC_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];
+ vlc_bool_t b_italics = p_font[x] & EIA608_FONT_ITALICS;
+ vlc_bool_t b_underline = p_font[x] & EIA608_FONT_UNDERLINE;
+ char utf8[4];
+
+ /* */
+ if( b_html )
+ {
+ vlc_bool_t 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 vlc_bool_t 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;
+ vlc_bool_t b_screen_changed = VLC_FALSE;
+
+ if( d1 == 0 && d2 == 0 )
+ return VLC_FALSE; /* Ignore padding */
+
+ Eia608ParseChannel( h, d1 );
+ if( h->i_channel != i_channel_selected )
+ return VLC_FALSE;
+
+ 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, vlc_bool_t b_html )
+{
+ const int i_size = EIA608_SCREEN_ROWS * 3 * EIA608_SCREEN_COLUMNS+1;
+ struct eia608_screen *screen = &h->screen[h->i_screen];
+ vlc_bool_t b_first = VLC_TRUE;
+ char *psz;
+ int i;
+
+ /* We allocate a buffer big enough for normal case */
+ psz = malloc( i_size );
+ *psz = '\0';
+ 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 = VLC_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 )
+{
+}
+
projects / vlc / commitdiff