subsdec.c

uclinux 下的vlc播放器源代码

        p_spu->i_y = 10;
    }
    else
    {
        msg_Dbg( p_dec, "style is: %s", p_style->psz_stylename);
        p_spu->p_region->p_style = &p_style->font_style;
        p_spu->i_flags = p_style->i_align;
        if( p_style->i_align & SUBPICTURE_ALIGN_LEFT )
        {
            p_spu->i_x = (i_margin_l) ? i_margin_l : p_style->i_margin_h;
        }
        else if( p_style->i_align & SUBPICTURE_ALIGN_RIGHT ) 
        {
            p_spu->i_x = (i_margin_r) ? i_margin_r : p_style->i_margin_h;
        }
        p_spu->i_y = (i_margin_v) ? i_margin_v : p_style->i_margin_v;
    }
}

static char* GotoNextLine( char *psz_text )
{
    char *p_newline = psz_text;

    while( p_newline[0] != '\0' )
    {
        if( p_newline[0] == '\n' || p_newline[0] == '\r' )
        {
            p_newline++;
            while( p_newline[0] == '\n' || p_newline[0] == '\r' )
                p_newline++;
            break;
        }
        else p_newline++;
    }
    return p_newline;
}

/*****************************************************************************
 * ParseColor: SSA stores color in BBGGRR, in ASS it uses AABBGGRR
 * The string value in the string can be a pure integer, or hexadecimal &HBBGGRR
 *****************************************************************************/
static void ParseColor( decoder_t *p_dec, char *psz_color, int *pi_color, int *pi_alpha )
{
    int i_color = 0;
    if( !strncasecmp( psz_color, "&H", 2 ) )
    {
        /* textual HEX representation */
        i_color = (int) strtol( psz_color+2, NULL, 16 );
    }
    else i_color = (int) strtol( psz_color, NULL, 0 );

    *pi_color = 0;
    *pi_color |= ( ( i_color & 0x000000FF ) << 16 ); /* Red */
    *pi_color |= ( ( i_color & 0x0000FF00 ) );       /* Green */
    *pi_color |= ( ( i_color & 0x00FF0000 ) >> 16 ); /* Blue */

    if( pi_alpha != NULL )
        *pi_alpha = ( i_color & 0xFF000000 ) >> 24;
}

/*****************************************************************************
 * ParseSSAHeader: Retrieve global formatting information etc
 *****************************************************************************/
static void ParseSSAHeader( decoder_t *p_dec )
{
    decoder_sys_t *p_sys = p_dec->p_sys;
    char *psz_parser = NULL;
    char *psz_header = malloc( p_dec->fmt_in.i_extra+1 );
    int i_section_type = 1;

    memcpy( psz_header, p_dec->fmt_in.p_extra, p_dec->fmt_in.i_extra );
    psz_header[ p_dec->fmt_in.i_extra] = '\0';

    /* Handle [Script Info] section */
    psz_parser = strcasestr( psz_header, "[Script Info]" );
    if( psz_parser == NULL ) goto eof;

    psz_parser = GotoNextLine( psz_parser );

    while( psz_parser[0] != '\0' )
    {
        int temp;
        char buffer_text[MAX_LINE + 1];

        if( psz_parser[0] == '!' || psz_parser[0] == ';' ) /* comment */;
        else if( sscanf( psz_parser, "PlayResX: %d", &temp ) == 1 )
            p_sys->i_original_width = ( temp > 0 ) ? temp : -1;
        else if( sscanf( psz_parser, "PlayResY: %d", &temp ) == 1 )
            p_sys->i_original_height = ( temp > 0 ) ? temp : -1;
        else if( sscanf( psz_parser, "Script Type: %8192s", buffer_text ) == 1 )
        {
            if( !strcasecmp( buffer_text, "V4.00+" ) ) p_sys->b_ass = VLC_TRUE;
        }
        else if( !strncasecmp( psz_parser, "[V4 Styles]", 11 ) )
            i_section_type = 1;
        else if( !strncasecmp( psz_parser, "[V4+ Styles]", 12) )
        {
            i_section_type = 2;
            p_sys->b_ass = VLC_TRUE;
        }
        else if( !strncasecmp( psz_parser, "[Events]", 8 ) )
            i_section_type = 4;
        else if( !strncasecmp( psz_parser, "Style:", 6 ) )
        {
            int i_font_size, i_bold, i_italic, i_border, i_outline, i_shadow, i_underline,
                i_strikeout, i_scale_x, i_scale_y, i_spacing, i_align, i_margin_l, i_margin_r, i_margin_v;

            char psz_temp_stylename[MAX_LINE+1];
            char psz_temp_fontname[MAX_LINE+1];
            char psz_temp_color1[MAX_LINE+1];
            char psz_temp_color2[MAX_LINE+1];
            char psz_temp_color3[MAX_LINE+1];
            char psz_temp_color4[MAX_LINE+1];

            if( i_section_type == 1 ) /* V4 */
            {
                if( sscanf( psz_parser, "Style: %8192[^,],%8192[^,],%d,%8192[^,],%8192[^,],%8192[^,],%8192[^,],%d,%d,%d,%d,%d,%d,%d,%d,%d%*[^\r\n]",
                    psz_temp_stylename, psz_temp_fontname, &i_font_size,
                    psz_temp_color1, psz_temp_color2, psz_temp_color3, psz_temp_color4, &i_bold, &i_italic,
                    &i_border, &i_outline, &i_shadow, &i_align, &i_margin_l, &i_margin_r, &i_margin_v ) == 16 )
                {
                    ssa_style_t *p_style = malloc( sizeof(ssa_style_t) );

                    p_style->psz_stylename = strdup( psz_temp_stylename );
                    p_style->font_style.psz_fontname = strdup( psz_temp_fontname );
                    p_style->font_style.i_font_size = i_font_size;

                    ParseColor( p_dec, psz_temp_color1, &p_style->font_style.i_font_color, NULL );
                    ParseColor( p_dec, psz_temp_color4, &p_style->font_style.i_shadow_color, NULL );
                    p_style->font_style.i_outline_color = p_style->font_style.i_shadow_color;
                    p_style->font_style.i_font_alpha = p_style->font_style.i_outline_alpha = p_style->font_style.i_shadow_alpha = 0x00;
                    p_style->font_style.i_style_flags = 0;
                    if( i_bold ) p_style->font_style.i_style_flags |= STYLE_BOLD;
                    if( i_italic ) p_style->font_style.i_style_flags |= STYLE_ITALIC;

                    if( i_border == 1 ) p_style->font_style.i_style_flags |= (STYLE_ITALIC | STYLE_OUTLINE);
                    else if( i_border == 3 )
                    {
                        p_style->font_style.i_style_flags |= STYLE_BACKGROUND;
                        p_style->font_style.i_background_color = p_style->font_style.i_shadow_color;
                        p_style->font_style.i_background_alpha = p_style->font_style.i_shadow_alpha;
                    }
                    p_style->font_style.i_shadow_width = i_shadow;
                    p_style->font_style.i_outline_width = i_outline;

                    p_style->i_align = 0;
                    if( i_align == 1 || i_align == 5 || i_align == 9 ) p_style->i_align |= SUBPICTURE_ALIGN_LEFT;
                    if( i_align == 3 || i_align == 7 || i_align == 11 ) p_style->i_align |= SUBPICTURE_ALIGN_RIGHT;
                    if( i_align < 4 ) p_style->i_align |= SUBPICTURE_ALIGN_BOTTOM;
                    else if( i_align < 8 ) p_style->i_align |= SUBPICTURE_ALIGN_TOP; 

                    p_style->i_margin_h = ( p_style->i_align & SUBPICTURE_ALIGN_RIGHT ) ? i_margin_r : i_margin_l;
                    p_style->i_margin_v = i_margin_v;

                    TAB_APPEND( p_sys->i_ssa_styles, p_sys->pp_ssa_styles, p_style );
                }
                else msg_Warn( p_dec, "SSA v4 styleline parsing failed" );
            }
            else if( i_section_type == 2 ) /* V4+ */
            {
                /* Format: Name, Fontname, Fontsize, PrimaryColour, SecondaryColour, OutlineColour, BackColour,
                   Bold, Italic, Underline, StrikeOut, ScaleX, ScaleY, Spacing, Angle, BorderStyle, Outline,
                   Shadow, Alignment, MarginL, MarginR, MarginV, Encoding
                */
                if( sscanf( psz_parser, "Style: %8192[^,],%8192[^,],%d,%8192[^,],%8192[^,],%8192[^,],%8192[^,],%d,%d,%d,%d,%d,%d,%d,%*f,%d,%d,%d,%d,%d,%d,%d%*[^\r\n]",
                    psz_temp_stylename, psz_temp_fontname, &i_font_size,
                    psz_temp_color1, psz_temp_color2, psz_temp_color3, psz_temp_color4, &i_bold, &i_italic,
                    &i_underline, &i_strikeout, &i_scale_x, &i_scale_y, &i_spacing, &i_border, &i_outline,
                    &i_shadow, &i_align, &i_margin_l, &i_margin_r, &i_margin_v ) == 21 )
                {
                    ssa_style_t *p_style = malloc( sizeof(ssa_style_t) );

                    p_style->psz_stylename = strdup( psz_temp_stylename );
                    p_style->font_style.psz_fontname = strdup( psz_temp_fontname );
                    p_style->font_style.i_font_size = i_font_size;
                    msg_Dbg( p_dec, psz_temp_color1 );
                    ParseColor( p_dec, psz_temp_color1, &p_style->font_style.i_font_color, &p_style->font_style.i_font_alpha );
                    ParseColor( p_dec, psz_temp_color3, &p_style->font_style.i_outline_color, &p_style->font_style.i_outline_alpha );
                    ParseColor( p_dec, psz_temp_color4, &p_style->font_style.i_shadow_color, &p_style->font_style.i_shadow_alpha );

                    p_style->font_style.i_style_flags = 0;
                    if( i_bold ) p_style->font_style.i_style_flags |= STYLE_BOLD;
                    if( i_italic ) p_style->font_style.i_style_flags |= STYLE_ITALIC;
                    if( i_underline ) p_style->font_style.i_style_flags |= STYLE_UNDERLINE;
                    if( i_strikeout ) p_style->font_style.i_style_flags |= STYLE_STRIKEOUT;
                    if( i_border == 1 ) p_style->font_style.i_style_flags |= (STYLE_ITALIC | STYLE_OUTLINE);
                    else if( i_border == 3 )
                    {
                        p_style->font_style.i_style_flags |= STYLE_BACKGROUND;
                        p_style->font_style.i_background_color = p_style->font_style.i_shadow_color;
                        p_style->font_style.i_background_alpha = p_style->font_style.i_shadow_alpha;
                    }
                    p_style->font_style.i_shadow_width  = ( i_border == 1 ) ? i_shadow : 0;
                    p_style->font_style.i_outline_width = ( i_border == 1 ) ? i_outline : 0;
                    p_style->font_style.i_spacing = i_spacing;
                    //p_style->font_style.f_angle = f_angle;

                    p_style->i_align = 0;
                    if( i_align == 0x1 || i_align == 0x4 || i_align == 0x1 ) p_style->i_align |= SUBPICTURE_ALIGN_LEFT;
                    if( i_align == 0x3 || i_align == 0x6 || i_align == 0x9 ) p_style->i_align |= SUBPICTURE_ALIGN_RIGHT;
                    if( i_align == 0x7 || i_align == 0x8 || i_align == 0x9 ) p_style->i_align |= SUBPICTURE_ALIGN_TOP;
                    if( i_align == 0x1 || i_align == 0x2 || i_align == 0x3 ) p_style->i_align |= SUBPICTURE_ALIGN_BOTTOM;
                    p_style->i_margin_h = ( p_style->i_align & SUBPICTURE_ALIGN_RIGHT ) ? i_margin_r : i_margin_l;
                    p_style->i_margin_v = i_margin_v;

                    /*TODO: Ignored: angle i_scale_x|y (fontscaling), i_encoding */
                    TAB_APPEND( p_sys->i_ssa_styles, p_sys->pp_ssa_styles, p_style );
                }
                else msg_Dbg( p_dec, "SSA V4+ styleline parsing failed" );
            }
        }
        psz_parser = GotoNextLine( psz_parser );
    }

eof:
    if( psz_header ) free( psz_header );
    return;
}

static void StripTags( char *psz_text )
{
    int i_left_moves = 0;
    vlc_bool_t b_inside_tag = VLC_FALSE;
    int i = 0;
    int i_tag_start = -1;
    while( psz_text[ i ] )
    {
        if( !b_inside_tag )
        {
            if( psz_text[ i ] == '<' )
            {
                b_inside_tag = VLC_TRUE;
                i_tag_start = i;
            }
            psz_text[ i - i_left_moves ] = psz_text[ i ];
        }
        else
        {
            if( ( psz_text[ i ] == ' ' ) ||
                ( psz_text[ i ] == '\t' ) ||
                ( psz_text[ i ] == '\n' ) ||
                ( psz_text[ i ] == '\r' ) )
            {
                b_inside_tag = VLC_FALSE;
                i_tag_start = -1;
            }
            else if( psz_text[ i ] == '>' )
            {
                i_left_moves += i - i_tag_start + 1;
                i_tag_start = -1;
                b_inside_tag = VLC_FALSE;
            }
            else
            {
                psz_text[ i - i_left_moves ] = psz_text[ i ];
            }
        }
        i++;
    }
    psz_text[ i - i_left_moves ] = '\0';
}