Closed captions decoder.

The rollup and paint on mode is not really good (a lot of flicker) but
I don't see how to fix it (the subtitle is updated as soon as a new
character is added).

modules/codec/cc.c

+/*****************************************************************************
+ * 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 )
+{
+}
+

modules/codec/cc.h

+/*****************************************************************************
+ * cc.h
+ *****************************************************************************
+ * Copyright (C) 2007 Laurent Aimar
+ * $Id: csa.h 20134 2007-05-16 14:30:27Z jpsaman $
+ *
+ * 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.
+ *****************************************************************************/
+
+#ifndef _CC_H
+#define _C_H 1
+
+/* CC have a maximum rate of 9600 bit/s (per field?) */
+#define CC_MAX_DATA_SIZE (2 * 3*600)
+typedef struct
+{
+    /* Which channel are present */
+    vlc_bool_t pb_present[4];
+
+    /* CC data per field
+     *  byte[x+0]: field (0/1)
+     *  byte[x+1]: cc data 1
+     *  byte[x+2]: cc data 2
+     */
+    int     i_data;
+    uint8_t p_data[CC_MAX_DATA_SIZE];
+} cc_data_t;
+
+static inline int cc_Channel( int i_field, const uint8_t p_data[2] )
+{
+    const uint8_t d = p_data[0] & 0x7f;
+    if( i_field != 0 && i_field != 1 )
+        return -1;
+    if( d == 0x14 )
+        return 2*i_field + 0;
+    else if( d == 0x1c )
+        return 2*i_field + 1;
+    /* unknown(middle of a command)  or not cc channel */
+    return -1;
+}
+static inline void cc_Init( cc_data_t *c )
+{
+    int i;
+
+    for( i = 0; i < 4; i++ )
+        c-> pb_present[i] = VLC_FALSE; 
+    c->i_data = 0;
+}
+static inline void cc_Exit( cc_data_t *c )
+{
+    return;
+}
+static inline void cc_Flush( cc_data_t *c )
+{
+    c->i_data = 0;
+}
+static inline void cc_Extract( cc_data_t *c, const uint8_t *p_src, int i_src )
+{
+    static const uint8_t p_cc_ga94[4] = { 0x47, 0x41, 0x39, 0x34 };
+    //static const uint8_t p_afd_start[4] = { 0x44, 0x54, 0x47, 0x31 };
+
+    if( i_src < 4 )
+        return;
+
+    /* cc_data()
+     *          u1 reserved(1)
+     *          u1 process_cc_data_flag
+     *          u1 additional_data_flag
+     *          u5 cc_count
+     *          u8 reserved(1111 1111)
+     *          for cc_count
+     *              u5 marker bit(1111 1)
+     *              u1 cc_valid
+     *              u2 cc_type
+     *              u8 cc_data_1
+     *              u8 cc_data_2
+     *          u8 marker bit(1111 1111)
+     *          if additional_data_flag
+     *              unknown
+     */
+    /* cc_type:
+     *  0x00: field 1
+     *  0x01: field 2
+     */
+    if( !memcmp( p_cc_ga94, p_src, 4 ) && i_src >= 5+1+1+1 && p_src[4] == 0x03 )
+    {
+        /* Extract CC from DVB/ATSC TS */
+        const uint8_t *cc = &p_src[5];
+        const int i_count_cc = cc[0]&0x1f;
+        int i;
+
+        if( !(cc[0]&0x40) ) // process flag
+            return;
+        if( i_src < 5 + 1+1 + i_count_cc*3 + 1)  // broken packet
+            return;
+        if( i_count_cc <= 0 )   // no cc present
+            return;
+        if( cc[2+i_count_cc * 3] != 0xff )  // marker absent
+            return;
+        cc += 2;
+
+        for( i = 0; i < i_count_cc; i++, cc += 3 )
+        {
+            int i_field = cc[0] & 0x03;
+            int i_channel;
+            if( ( cc[0] & 0xfc ) != 0xfc )
+                continue;
+            if( i_field != 0 && i_field != 1 )
+                continue;
+            if( c->i_data + 3 > CC_MAX_DATA_SIZE )
+                continue;
+
+            i_channel = cc_Channel( i_field, &cc[1] );
+            if( i_channel >= 0 && i_channel < 4 )
+                c->pb_present[i_channel] = VLC_TRUE;
+
+            c->p_data[c->i_data++] = i_field;
+            c->p_data[c->i_data++] = cc[1];
+            c->p_data[c->i_data++] = cc[2];
+        }
+    }
+    else
+    {
+        /* TODO DVD CC, ... */
+    }
+}
+
+#endif /* _CC_H */
+