initial checkin of work-in-progress vbidec plugin for closed caption support

Original commit message from CVS:
initial checkin of work-in-progress vbidec plugin for closed caption support

1 files changed, 1079 insertions, 0 deletions

diff --git a/gst/vbidec/vbidata.c b/gst/vbidec/vbidata.c
new file mode 100644
index 00000000..14d7a7e0
--- /dev/null
+++ b/gst/vbidec/vbidata.c
@@ -0,0 +1,1079 @@
+/**
+ * Copyright (c) 2002 Billy Biggs <vektor@dumbterm.net>.
+ * Copyright (c) 2002 Doug Bell <drbell@users.sourceforge.net>
+ *
+ * CC code from Nathan Laredo's ccdecode, used under the GPL.
+ * Lots of 'hey what does this mean?' code from
+ * Billy Biggs and Doug Bell, like all the crap with
+ * XDS and stuff.  Some help from Zapping's vbi library by
+ * Michael H. Schimek and others, released under the GPL.
+ *
+ * Modified and adapted to GStreamer by
+ * David I. Lehn <dlehn@users.sourceforge.net>
+ *
+ * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <string.h>
+#include <fcntl.h>
+#include <ctype.h>
+#include <unistd.h>
+#include <errno.h>
+#include "vbidata.h"
+#include "vbiscreen.h"
+/*#include "tvtimeosd.h"*/
+
+#define DO_LINE 11
+static int pll = 0;
+
+struct vbidata_s
+{
+    int fd;
+    vbiscreen_t *vs;
+    /*tvtime_osd_t *osd;*/
+    char buf[ 65536 ];
+    int wanttop;
+    int wanttext;
+
+    unsigned int colour;
+    int row, ital;
+    int indent, ul;
+    int chan;
+
+    unsigned int current_colour;
+    int current_row, current_ital;
+    int current_indent, current_ul;
+    int current_chan;
+    int current_istext;
+
+    int initialised;
+    int enabled;
+    int lastcode;
+    int lastcount;
+    int verbose;
+
+    /* XDS data */
+    char xds_packet[ 2048 ];
+    int xds_cursor;
+
+    char *program_name;
+    char *network_name;
+    char *call_letters;
+    const char *rating;
+    const char *program_type;
+    int start_day;
+    int start_month;
+    int start_min;
+    int start_hour;
+    int length_hour;
+    int length_min;
+    int length_elapsed_hour;
+    int length_elapsed_min;
+    int length_elapsed_sec;
+    char *program_desc[8];
+};
+
+
+/* this is NOT exactly right */
+//static char *ccode = " !\"#$%&'()\0341+,-./0123456789:;<=>?@"
+static char *ccode = " !\"#$%&'()a+,-./0123456789:;<=>?@"
+                     "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
+//                     "abcdefghijklmnopqrstuvwxyz"
+//                     "[\0351]\0355\0363\0372abcdefghijklmnopqr"
+                     "[e]iouabcdefghijklmnopqr"
+//                     "stuvwxyz\0347\0367\0245\0244\0240";
+                     "stuvwxyzcoNn ";
+static char *wccode = "\0256\0260\0275\0277T\0242\0243#\0340 "
+                      "\0350\0354\0362\0371";
+
+static char *extcode1 = "\0301\0311\0323\0332\0334\0374"
+                       "`\0241*'-\0251S*\"\"\0300\0302"
+                       "\0307\0310\0312\0313\0353\0316\0317\0357"
+                       "\0324\0331\0371\0333\0253\0273";
+
+static char *extcode2 = "\0303\0343\0315\0314\0354\0322\0362\0325"
+                        "{}\\^_|~\0304\0344\0326\0366\0337\0245\0244|"
+                        "\0305\0345\0330\0370++++";
+
+int parityok(int n)
+{				/* check parity for 2 bytes packed in n */
+    int j, k;
+    for (k = 0, j = 0; j < 7; j++)
+        if (n & (1 << j))
+            k++;
+    if ((k & 1) && (n & 0x80))
+        return 0;
+    for (k = 0, j = 8; j < 15; j++)
+        if (n & (1 << j))
+            k++;
+    if ((k & 1) && (n & 0x8000))
+        return 0;
+    return 1;
+}
+
+int decodebit(unsigned char *data, int threshold)
+{
+    return ((data[0] + data[1] + data[2] + data[3] + data[4] + data[5] +
+             data[6] + data[7] + data[8] + data[9] + data[10] + data[11] +
+             data[12] + data[13] + data[14] + data[15] + data[16] + data[17] +
+             data[18] + data[19] + data[20] + data[21] + data[22] + data[23] +
+             data[24] + data[25] + data[26] + data[27] + data[28] + data[29] +
+             data[30] + data[31])>>5 > threshold);
+}
+
+
+int ccdecode(unsigned char *vbiline)
+{
+    int max = 0, maxval = 0, minval = 255, i = 0, clk = 0, tmp = 0;
+    int sample, packedbits = 0;
+
+    for (i=0; i<250; i++) {
+        sample = vbiline[i];
+        if (sample - maxval > 10)
+            (maxval = sample, max = i);
+        if (sample < minval)
+            minval = sample;
+        if (maxval - sample > 40)
+            break;
+    }
+    sample = ((maxval + minval) >> 1);
+    pll = max;
+
+    /* found clock lead-in, double-check start */
+#ifndef PAL_DECODE
+    i = max + 478;
+#else
+    i = max + 538;
+#endif
+    if (!decodebit(&vbiline[i], sample))
+        return 0;
+#ifndef PAL_DECODE
+    tmp = i + 57;		/* tmp = data bit zero */
+#else
+    tmp = i + 71;
+#endif
+    for (i = 0; i < 16; i++) {
+#ifndef PAL_DECODE
+        clk = tmp + i * 57;
+#else
+        clk = tmp + i * 71;
+#endif
+        if (decodebit(&vbiline[clk], sample)) {
+            packedbits |= 1 << i;
+        }
+    }
+    if (parityok(packedbits))
+        return packedbits;
+    return 0;
+}				/* ccdecode */
+
+const char *movies[] = { "N/A", "G", "PG", "PG-13", "R", 
+                         "NC-17", "X", "Not Rated" };
+const char *usa_tv[] = { "Not Rated", "TV-Y", "TV-Y7", "TV-G", 
+                         "TV-PG", "TV-14", "TV-MA", "Not Rated" };
+const char *cane_tv[] = { "Exempt", "C", "C8+", "G", "PG", 
+                          "14+", "18+", "Reserved" };
+const char *canf_tv[] = { "Exempt", "G", "8 ans +", "13 ans +", 
+                          "16 ans +", "18 ans +", "Reserved", 
+                          "Reserved" };
+
+const char *months[] = { 0, "Jan", "Feb", "Mar", "Apr", "May",
+    "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" };
+
+static const char *eia608_program_type[ 96 ] = {
+  "education", "entertainment", "movie", "news", "religious", "sports",
+  "other", "action", "advertisement", "animated", "anthology",
+  "automobile", "awards", "baseball", "basketball", "bulletin", "business",
+  "classical", "college", "combat", "comedy", "commentary", "concert",
+  "consumer", "contemporary", "crime", "dance", "documentary", "drama",
+  "elementary", "erotica", "exercise", "fantasy", "farm", "fashion",
+  "fiction", "food", "football", "foreign", "fund raiser", "game/quiz",
+  "garden", "golf", "government", "health", "high school", "history",
+  "hobby", "hockey", "home", "horror", "information", "instruction",
+  "international", "interview", "language", "legal", "live", "local",
+  "math", "medical", "meeting", "military", "miniseries", "music", "mystery",
+  "national", "nature", "police", "politics", "premiere", "prerecorded",
+  "product", "professional", "public", "racing", "reading", "repair", "repeat",
+  "review", "romance", "science", "series", "service", "shopping",
+  "soap opera", "special", "suspense", "talk", "technical", "tennis",
+  "travel", "variety", "video", "weather", "western"
+};
+
+
+static void parse_xds_packet( vbidata_t *vbi, char *packet, int length )
+{
+    int sum = 0;
+    int i;
+
+    if( !vbi ) return;
+
+    /* Check the checksum for validity of the packet. */
+    for( i = 0; i < length - 1; i++ ) {
+        sum += packet[ i ];
+    }
+    if( (((~sum) & 0x7f) + 1) != packet[ length - 1 ] ) {
+        return;
+    }
+
+    /* Stick a null at the end, and cut off the last two characters. */
+    packet[ length - 2 ] = '\0';
+    length -= 2;
+
+    if( packet[ 0 ] == 0x01 && packet[ 1 ] == 0x03 ) {
+        if( vbi->program_name && !strcmp(vbi->program_name, packet + 2 ) ) {
+            return;
+        }
+        if( vbi->verbose ) fprintf( stderr, "Current program name: '%s'\n", packet + 2 );
+        if( vbi->program_name ) free( vbi->program_name );
+        vbi->program_name = strdup(packet + 2);
+        /*tvtime_osd_set_show_name( vbi->osd, vbi->program_name );*/
+    } else if( packet[ 0 ] == 0x03 && packet[ 1 ] == 0x03 ) {
+        if( vbi->verbose ) fprintf( stderr, "Future program name: '%s'\n", packet + 2 );
+    } else if( packet[ 0 ] == 0x05 && packet[ 1 ] == 0x01 ) {
+        if( vbi->network_name && !strcmp(vbi->network_name, packet + 2 ) ) {
+            return;
+        }
+
+        if( vbi->verbose ) fprintf( stderr, "Network name: '%s'\n", packet + 2 );
+        if( vbi->network_name ) free( vbi->network_name );
+        vbi->network_name = strdup( packet + 2 );
+        /*tvtime_osd_set_network_name( vbi->osd, vbi->network_name );*/
+    } else if( packet[ 0 ] == 0x01 && packet[ 1 ] == 0x05 ) {
+        int movie_rating = packet[ 2 ] & 7;
+        int scheme = (packet[ 2 ] & 56) >> 3;
+        int tv_rating = packet[ 3 ] & 7;
+        int VSL = packet[ 3 ] & 56;
+        const char * str;
+
+        switch( VSL | scheme ) {
+        case 3: /* Canadian English TV */
+            str = cane_tv[ tv_rating ];
+            break;
+        case 7: /* Canadian French TV */
+            str = canf_tv[ tv_rating ];
+            break;
+        case 19: /* Reserved */
+        case 31:
+            str = "";
+            break;
+        default:
+            if( ((VSL | scheme) & 3) == 1 ) {
+                /* USA TV */
+                str = usa_tv[ tv_rating ];
+            } else {
+                /* MPAA Movie Rating */
+                str = movies[ movie_rating ];
+            }
+            break;
+        }
+
+        if( vbi->rating && !strcmp(vbi->rating, str ) ) {
+            return;
+        }
+
+        if( vbi->verbose ) fprintf( stderr, "Show rating: %s", str );
+        if( ((VSL | scheme) & 3) == 1 || ((VSL | scheme) & 3) == 0 ) {
+            /* show VSLD for the americans */
+            if( (VSL | scheme) & 32 ) {
+                if( vbi->verbose ) fprintf( stderr, " V" );
+            }
+            if( (VSL | scheme) & 16 ) {
+                if( vbi->verbose ) fprintf( stderr, " S" );
+            }
+            if( (VSL | scheme) & 8 ) {
+                if( vbi->verbose ) fprintf( stderr, " L" );
+            }
+            if( (VSL | scheme) & 4 ) {
+                if( vbi->verbose ) fprintf( stderr, " D" );
+            }
+        }
+        if( vbi->verbose ) fprintf( stderr, "\n" );
+        vbi->rating = str;
+        /*tvtime_osd_set_show_rating( vbi->osd, vbi->rating );*/
+    } else if( packet[ 0 ] == 0x05 && packet[ 1 ] == 0x02 ) {
+        if( vbi->call_letters && !strcmp(vbi->call_letters, packet + 2 ) ) {
+            return;
+        }
+
+        if( vbi->verbose ) fprintf( stderr, "Network call letters: '%s'\n", packet + 2 );
+        if( vbi->call_letters ) free( vbi->call_letters );
+        vbi->call_letters = strdup( packet + 2 );
+        /*tvtime_osd_set_network_call( vbi->osd, vbi->call_letters );*/
+    } else if( packet[ 0 ] == 0x01 && packet[ 1 ] == 0x01 ) {
+                        int month = packet[5];// & 15;
+                        int day = packet[4];// & 31;
+                        int hour = packet[3];// & 31;
+                        int min = packet[2];// & 63;
+                        char str[33];
+        if( vbi->verbose ) fprintf( stderr, "Program Start: %02d %s, %02d:%02d\n",
+                 day & 31, months[month & 15], hour & 31, min & 63 );
+                 // packet[ 3 ], packet[ 4 ], packet[ 5 ], packet[ 6 ] );
+                 //packet[ 5 ] & 31, packet[ 6 ], packet[ 4 ] & 31, packet[ 3 ] & 63 );
+        vbi->start_month = month & 15;
+        vbi->start_day = day & 31;
+        vbi->start_hour = hour & 31;
+        vbi->start_min = hour & 63;
+        snprintf( str, 32, "%02d %s, %02d:%02d",
+                  day & 31, months[month & 15], hour & 31, min & 63 );
+        /*tvtime_osd_set_show_start( vbi->osd, str );*/
+    } else if( packet[ 0 ] == 0x01 && packet[ 1 ] == 0x04 ) {
+        if( vbi->verbose ) fprintf( stderr, "Program type: " );
+        for( i = 0; i < length - 2; i++ ) {
+            int cur = packet[ 2 + i ] - 0x20;
+            if( cur >= 0 && cur < 96 ) {
+                if( vbi->verbose ) fprintf( stderr, "%s%s", i ? ", " : "", eia608_program_type[ cur ] );
+                /* this will cause us to keep only the last type we check */
+                vbi->program_type = eia608_program_type[ cur ];
+            }
+        }
+        if( vbi->verbose ) fprintf( stderr, "\n" );
+    } else if( packet[ 0 ] < 0x03 && packet[ 1 ] >= 0x10 && packet[ 1 ] <= 0x17 ) {
+
+        if( vbi->program_desc[ packet[1] & 0xf ] && 
+            !strcmp(vbi->program_desc[ packet[1] & 0xf ], packet + 2 ) ) {
+            return;
+        }
+
+        if( vbi->verbose ) fprintf( stderr, "Program Description: Line %d", packet[1] & 0xf );
+        if( vbi->verbose ) fprintf( stderr, "%s\n", packet + 2 );
+        if( vbi->program_desc[ packet[1] & 0xf ] ) 
+            free( vbi->program_desc[ packet[1] & 0xf ] );
+        vbi->program_desc[ packet[1] & 0xf ] = strdup( packet + 2 );
+    } else if( packet[ 0 ] == 0x01 && packet[ 1 ] == 0x02 ) {
+        char str[ 33 ];
+        str[0] = 0;
+        if( vbi->verbose ) fprintf( stderr, "Program Length: %02d:%02d", 
+                 packet[ 3 ] & 63, packet[ 2 ] & 63 ); 
+        vbi->length_hour = packet[ 3 ] & 63;
+        vbi->length_min = packet[ 2 ] & 63;
+        snprintf( str, 32, "%02d:%02d", 
+                 packet[ 3 ] & 63, packet[ 2 ] & 63 );
+        if( length > 4 ) {
+            if( vbi->verbose ) fprintf( stderr, " Elapsed: %02d:%02d", packet[ 5 ] & 63, 
+                     packet[ 4 ] & 63 );
+        vbi->length_elapsed_hour = packet[ 5 ] & 63;
+        vbi->length_elapsed_min = packet[ 4 ] & 63;
+        snprintf( str, 32, "%02d:%02d/%02d:%02d", 
+                  packet[ 5 ] & 63, packet[ 4 ] & 63,
+                  packet[ 3 ] & 63, packet[ 2 ] & 63 );
+        } else {
+            vbi->length_elapsed_hour = 0;
+            vbi->length_elapsed_min = 0;
+        }
+
+        if( length > 6 ) {
+            if( vbi->verbose ) fprintf( stderr, ".%02d", packet[ 6 ] & 63 );
+            vbi->length_elapsed_hour = packet[ 6 ] & 63;
+            snprintf( str, 32, "%02d:%02d.%02d/%02d:%02d", 
+                      packet[ 5 ] & 63, packet[ 4 ] & 63, packet[ 6 ] & 63, 
+                      packet[ 3 ] & 63, packet[ 2 ] & 63 );
+        } else {
+            vbi->length_elapsed_hour = 0;
+        }
+        /*tvtime_osd_set_show_length( vbi->osd, str );*/
+        if( vbi->verbose ) fprintf( stderr, "\n" );
+    } else if( packet[ 0 ] == 0x05 && packet[ 1 ] == 0x04 ) {
+        if( vbi->verbose ) fprintf( stderr, "Transmission Signal Identifier (TSID): 0x%04x\n",
+                 packet[ 2 ] << 24 | packet[ 3 ] << 16 | packet[ 4 ] << 8 | packet[ 5 ] );
+    } else {
+        /* unknown */
+
+        if( vbi->verbose ) fprintf( stderr, "Unknown XDS packet, class " );
+        switch( packet[ 0 ] ) {
+        case 0x1: if( vbi->verbose ) fprintf( stderr, "CURRENT start\n" ); break;
+        case 0x2: if( vbi->verbose ) fprintf( stderr, "CURRENT continue\n" ); break;
+
+        case 0x3: if( vbi->verbose ) fprintf( stderr, "FUTURE start\n" ); break;
+        case 0x4: if( vbi->verbose ) fprintf( stderr, "FUTURE continue\n" ); break;
+
+        case 0x5: if( vbi->verbose ) fprintf( stderr, "CHANNEL start\n" ); break;
+        case 0x6: if( vbi->verbose ) fprintf( stderr, "CHANNEL continue\n" ); break;
+
+        case 0x7: if( vbi->verbose ) fprintf( stderr, "MISC start\n" ); break;
+        case 0x8: if( vbi->verbose ) fprintf( stderr, "MISC continue\n" ); break;
+
+        case 0x9: if( vbi->verbose ) fprintf( stderr, "PUB start\n" ); break;
+        case 0xa: if( vbi->verbose ) fprintf( stderr, "PUB continue\n" ); break;
+
+        case 0xb: if( vbi->verbose ) fprintf( stderr, "RES start\n" ); break;
+        case 0xc: if( vbi->verbose ) fprintf( stderr, "RES continue\n" ); break;
+
+        case 0xd: if( vbi->verbose ) fprintf( stderr, "UNDEF start\n" ); break;
+        case 0xe: if( vbi->verbose ) fprintf( stderr, "UNDEF continue\n" ); break;
+        }
+        for( i = 0; i < length; i++ ) {
+            if( vbi->verbose ) fprintf( stderr, "0x%02x ", packet[ i ] );
+        }
+        if( vbi->verbose ) fprintf( stderr, "\n" );
+    }
+}
+
+static int xds_decode( vbidata_t *vbi, int b1, int b2 )
+{
+    if( !vbi ) return 0;
+    if( vbi->xds_cursor > 2046 ) {
+        vbi->xds_cursor = 0;
+    }
+
+    if( !vbi->xds_cursor && b1 > 0xf ) {
+        return 0;
+    }
+
+
+    if( b1 < 0xf && (b1 & 0x2) ) {
+        /* ignore the continue and thus 'support' continuation of
+           a single packet */
+        return 1;
+    } else if( b1 < 0xf ) {
+        /* kill old packet cause we got a new one */
+        vbi->xds_cursor = 0;
+    }
+
+    vbi->xds_packet[ vbi->xds_cursor ] = b1;
+    vbi->xds_packet[ vbi->xds_cursor + 1 ] = b2;
+    vbi->xds_cursor += 2;
+
+    if( b1 == 0xf ) {
+        parse_xds_packet( vbi, vbi->xds_packet, vbi->xds_cursor );
+        vbi->xds_cursor = 0;
+    }
+
+    return 1;
+}
+
+#define NOMODE  0
+
+#define CC1     1
+#define CC2     2
+#define T1      3
+#define T2      4
+
+#define CC3     1
+#define CC4     2
+#define T3      3
+#define T4      4
+
+const unsigned int colours[] = { 
+    0xFFFFFFFFU, /* white */
+    0xFF00FF00U, /* green */
+    0xFF0000FFU, /* blue */
+    0xFF00C7C7U, /* cyan */
+    0xFFFF0000U, /* red */
+    0xFFFFFF00U, /* yellow */
+    0xFFC700C7U  /* magenta */
+};
+
+const int rows[] = {
+    11,
+    0, /* unused */
+    1,
+    2,
+    3,
+    4,
+    12,
+    13,
+    14,
+    15,
+    5,
+    6,
+    7,
+    8,
+    9,
+    10    
+};
+
+#define ROLL_2      6
+#define ROLL_3      7
+#define ROLL_4      8
+#define POP_UP      9
+#define PAINT_ON    10
+
+
+static int Process16b( vbidata_t *vbi, int bottom, int w1 )
+{
+    int b1, b2;
+
+    b1 = w1 & 0x7f;
+    b2 = (w1 >> 8) & 0x7f;
+
+    if( !b1 && !b2 ) {
+        return 0;
+    }
+
+    if( vbi->enabled && 
+        b1 >= 0x10 && b1 <= 0x1F && b2 >= 0x20 && b2 <= 0x7F ) {
+        int code;
+        if( (b2 & 64) ) {
+            /* Preamble Code */
+            /* This sets up colors and indenting */
+
+            if( !bottom && vbi->lastcode == ( (b1 << 8) | b2 ) ) {
+                vbi->lastcount = (vbi->lastcount + 1) % 2;
+                return 1;
+            }
+
+            vbi->current_chan = (b1 & 8) >> 3;
+            if( !bottom == vbi->wanttop ) {
+                if( vbi->chan != vbi->current_chan )
+                    return 0;
+            } else return 0;
+
+            vbi->current_ital = (b2 & 1);
+            if( !(b2 & 16) ) {
+                vbi->current_colour = colours[ (b2 & 30) >> 1 ];
+                vbi->current_indent = 0;
+            } else {
+                vbi->current_colour = 0xFFFFFFFFU; /* white */
+                vbi->current_indent = 4*( (b2 & 14) >> 1 );
+            }
+            vbi->current_row = rows[ ((b1 & 7) << 1) | ((b2 & 32) >> 5) ];
+            vbi->current_ul = b2 & 1;
+
+            if( vbi->verbose ) fprintf( stderr, "field: %d chan %d, ital %d, ul %d, colour 0x%x, "
+                     "indent %d, row %d\n", bottom, vbi->current_chan,
+                     vbi->current_ital, vbi->current_ul, vbi->current_colour,
+                     vbi->current_indent, vbi->current_row );
+
+            if( !bottom == vbi->wanttop && 
+                vbi->current_chan == vbi->chan && 
+                vbi->current_istext == vbi->wanttext ) {
+
+                vbi->indent = vbi->current_indent;
+                vbi->ital = vbi->current_ital;
+                vbi->colour = vbi->current_colour;
+                vbi->row = vbi->current_row;
+                vbi->current_istext = 0;
+
+                vbiscreen_new_caption( vbi->vs, vbi->indent, vbi->ital,
+                                       vbi->colour, vbi->row );
+
+            }
+
+            vbi->lastcode = ( b1 << 8) | b2;
+            vbi->lastcount = 0;
+            return 1;
+        }
+
+        if( (b1 & 8) == 1 ) {
+            /* Midrow code */
+            if( !vbi->initialised ) return 0;
+
+            if( !bottom && vbi->lastcode == ( (b1 << 8) | b2 ) ) {
+                vbi->lastcount = (vbi->lastcount + 1) % 2;
+                return 1;
+            }
+
+            if( vbi->verbose ) fprintf( stderr, "Midrow TODO: Add me.\n" );
+
+            vbi->lastcode = ( b1 << 8) | b2;
+            return 1;
+        }
+
+        if( (b1 & 2) && !(b2 & 64) ) {
+            if( !vbi->initialised ) return 0;
+
+            if( !bottom && vbi->lastcode == ( (b1 << 8) | b2 ) ) {
+                vbi->lastcount = (vbi->lastcount + 1) % 2;
+                return 1;
+            }
+
+            if( vbi->verbose ) fprintf( stderr, "Tab Offset: %d columns\n", b2 & 3 );
+            if( vbi->wanttext && vbi->current_istext && 
+                vbi->current_chan == vbi->chan && !bottom == vbi->wanttop ) {
+                vbiscreen_tab( vbi->vs, b2 & 3 );
+            }
+            vbi->lastcode = ( b1 << 8) | b2;
+            return 1;
+        }
+
+        switch( (code = b2 & 15) ) {
+        case 0: /* POP-UP */
+        case 5: /* ROLL UP 2 */
+        case 6: /* ROLL UP 3 */
+        case 7: /* ROLL UP 4 */
+        case 9: /* PAINT-ON */
+        case 10:/* TEXT */
+        case 11:/* TEXT */
+            vbi->initialised = 1;
+            if( !bottom && vbi->lastcode == ( (b1 << 8) | b2 ) ) {
+                /* This is the repeated Control Code */
+                vbi->lastcount = (vbi->lastcount + 1) % 2;
+                return 1;
+            }
+            switch( code ) {
+            case 0: /* POP-UP */
+                if( !vbi->wanttext && vbi->current_chan == vbi->chan &&
+                    !bottom == vbi->wanttop ) {
+                    if( vbi->verbose )
+                        fprintf( stderr, "Pop-Up\n");
+                    vbi->indent = vbi->current_indent;
+                    vbi->ital = vbi->current_ital;
+                    vbi->colour = vbi->current_colour;
+                    vbi->row = vbi->current_row;
+                    vbi->current_istext = 0;
+                    vbiscreen_set_mode( vbi->vs, 1, POP_UP );
+                }
+                break;
+            case 5: /* ROLL UP 2 */ 
+                if( !vbi->wanttext && vbi->current_chan == vbi->chan &&
+                    !bottom == vbi->wanttop ) {
+                    if( vbi->verbose )
+                        fprintf( stderr, "Roll-Up 2 (RU2)\n");
+                    vbi->indent = vbi->current_indent;
+                    vbi->ital = vbi->current_ital;
+                    vbi->colour = vbi->current_colour;
+                    vbi->row = vbi->current_row;
+                    vbi->current_istext = 0;
+                    vbiscreen_set_mode( vbi->vs, 1, ROLL_2 );
+                }
+                break;
+            case 6: /* ROLL UP 3 */ 
+                if( !vbi->wanttext && vbi->current_chan == vbi->chan &&
+                    !bottom == vbi->wanttop ) {
+                    if( vbi->verbose )
+                        fprintf( stderr, "Roll-Up 3 (RU3)\n");
+                    vbi->indent = vbi->current_indent;
+                    vbi->ital = vbi->current_ital;
+                    vbi->colour = vbi->current_colour;
+                    vbi->row = vbi->current_row;
+                    vbi->current_istext = 0;
+                    vbiscreen_set_mode( vbi->vs, 1, ROLL_3 );
+                }
+                break;
+            case 7: /* ROLL UP 4 */ 
+                if( !vbi->wanttext && vbi->current_chan == vbi->chan &&
+                    !bottom == vbi->wanttop ) {
+                    if( vbi->verbose )
+                        fprintf( stderr, "Roll-Up 4 (RU4)\n");
+                    vbi->indent = vbi->current_indent;
+                    vbi->ital = vbi->current_ital;
+                    vbi->colour = vbi->current_colour;
+                    vbi->row = vbi->current_row;
+                    vbi->current_istext = 0;
+                    vbiscreen_set_mode( vbi->vs, 1, ROLL_4 );
+                }
+                break;
+            case 9: /* PAINT-ON */
+                if( !vbi->wanttext && vbi->current_chan == vbi->chan &&
+                    !bottom == vbi->wanttop ) {
+                    if( vbi->verbose )
+                        fprintf( stderr, "Paint-On\n");
+                    vbi->indent = vbi->current_indent;
+                    vbi->ital = vbi->current_ital;
+                    vbi->colour = vbi->current_colour;
+                    vbi->row = vbi->current_row;
+                    vbi->current_istext = 0;
+                    vbiscreen_set_mode( vbi->vs, 1, PAINT_ON );
+                }
+                break;
+            case 10:/* TEXT */
+                if( vbi->wanttext && vbi->current_chan == vbi->chan &&
+                    !bottom == vbi->wanttop ) {
+                    if( vbi->verbose )
+                        fprintf( stderr, "Text Restart\n");
+                    vbi->indent = vbi->current_indent;
+                    vbi->ital = vbi->current_ital;
+                    vbi->colour = vbi->current_colour;
+                    vbi->row = vbi->current_row;
+                    vbi->current_istext = 1;
+                    vbiscreen_set_mode( vbi->vs, 0, 0 );
+                }
+                break;
+            case 11:/* TEXT */
+                if( vbi->wanttext && vbi->current_chan == vbi->chan &&
+                    !bottom == vbi->wanttop ) {
+                    if( vbi->verbose )
+                        fprintf( stderr, "Resume Text Display\n");
+                    vbi->indent = vbi->current_indent;
+                    vbi->ital = vbi->current_ital;
+                    vbi->colour = vbi->current_colour;
+                    vbi->row = vbi->current_row;
+                    vbi->current_istext = 1;
+                    vbiscreen_set_mode( vbi->vs, 0, 0 );
+                }
+                break;
+            default: /* impossible */
+                break;
+            }
+            break;
+        case 1:
+            if( !vbi->initialised ) return 0;
+            if( !bottom && vbi->lastcode == ( (b1 << 8) | b2 ) ) {
+                vbi->lastcount = (vbi->lastcount + 1) % 2;
+            }
+            if( !bottom == vbi->wanttop && vbi->current_chan == vbi->chan &&
+                vbi->current_istext == vbi->wanttext ) {
+                if( vbi->verbose )
+                    fprintf( stderr, "Backspace\n");
+                vbiscreen_backspace( vbi->vs );
+            }
+            break;
+        case 2:
+        case 3:
+            if( !vbi->initialised ) return 0;
+            fprintf( stderr, "Reserved\n");
+            break;
+        case 4:
+            if( !vbi->initialised ) return 0;
+            if( !bottom && vbi->lastcode == ( (b1 << 8) | b2 ) ) {
+                vbi->lastcount = (vbi->lastcount + 1) % 2;
+            }
+            if( !bottom == vbi->wanttop && vbi->current_chan == vbi->chan &&
+                vbi->current_istext == vbi->wanttext ) {
+                if( vbi->verbose )
+                    fprintf( stderr, "Delete to End of Row\n");
+                vbiscreen_delete_to_end( vbi->vs );
+            }
+            break;
+        case 8:
+            if( !vbi->initialised ) return 0;
+            if( vbi->verbose )
+                fprintf( stderr, "Flash On\n");
+            break;
+        case 12:
+        case 13:
+        case 14:
+        case 15:
+            if( !vbi->initialised ) return 0;
+            if( !bottom && vbi->lastcode == ( (b1 << 8) | b2 ) ) {
+                vbi->lastcount = (vbi->lastcount + 1) % 2;
+                return 1;
+            }
+
+            switch( code ) {
+            case 12:
+                /* Show buffer 1, Fill buffer 2 */
+                if( !bottom == vbi->wanttop && 
+                    vbi->current_chan == vbi->chan && 
+                    vbi->current_istext == vbi->wanttext ) {
+                    if( vbi->verbose )
+                        fprintf( stderr, "Erase Displayed Memory\n");
+                    vbiscreen_erase_displayed( vbi->vs );
+                }
+                break;
+            case 13:
+                if( !bottom == vbi->wanttop && 
+                    vbi->current_chan == vbi->chan && 
+                    vbi->current_istext == vbi->wanttext ) {
+                    if( vbi->verbose )
+                        fprintf( stderr, "Carriage Return\n");
+                    vbiscreen_carriage_return( vbi->vs );
+                }
+                break;
+            case 14:
+                if( !bottom == vbi->wanttop && 
+                    vbi->current_chan == vbi->chan && 
+                    vbi->current_istext == vbi->wanttext ) {
+                    if( vbi->verbose )
+                        fprintf( stderr, "Erase Non-Displayed\n");
+                    vbiscreen_erase_non_displayed( vbi->vs );
+                }
+                break;
+            case 15:
+                /* Show buffer 2, Fill Buffer 1 */
+                if( !bottom == vbi->wanttop && 
+                    vbi->current_chan == vbi->chan && 
+                    vbi->current_istext == vbi->wanttext ) {
+                    if( vbi->verbose )
+                        fprintf( stderr, "End Of Caption\n");
+                    vbiscreen_end_of_caption( vbi->vs );
+                }
+                break;
+            default: /* impossible */
+                return 0;
+                break;
+            }
+            break;
+        default: /* Impossible */
+            return 0;
+            break;
+        }
+
+        if( vbi->lastcode != ((b1 << 8) | b2) ) {
+            vbi->lastcount = 0;
+        }
+
+        vbi->lastcode =  (b1 << 8) | b2;
+        return 1;
+    }
+
+    if( bottom && xds_decode( vbi, b1, b2 ) ) {
+        return 1;
+    }
+
+    if( !vbi->enabled ) return 0;
+
+    vbi->lastcode = 0;
+    vbi->lastcount = 0;
+
+    if( !vbi->initialised )
+        return 0;
+
+    if( !bottom != vbi->wanttop || vbi->current_chan != vbi->chan || 
+        vbi->current_istext != vbi->wanttext ) {
+        return 0;
+    }
+
+    if( b1 == 0x11 || b1 == 0x19 || 
+        b1 == 0x12 || b1 == 0x13 || 
+        b1 == 0x1A || b1 == 0x1B ) {
+        switch( b1 ) {
+        case 0x1A:
+        case 0x12:
+            /* use extcode1 */
+            if( b1 > 31 && b2 > 31 && b1 <= 0x3F && b2 <= 0x3F )
+                if( vbi->verbose )
+                    fprintf( stderr, "char %d (%c),  char %d (%c)\n", b1, 
+                             extcode1[b1-32] , b2, extcode1[b2-32] );
+
+            break;
+        case 0x13:
+        case 0x1B:
+            /* use extcode2 */
+            if( b1 > 31 && b2 > 31 && b1 <= 0x3F && b2 <= 0x3F )
+                if( vbi->verbose )
+                    fprintf( stderr, "char %d (%c),  char %d (%c)\n", b1, 
+                             extcode2[b1-32] , b2, extcode2[b2-32] );
+
+            break;
+        case 0x11:
+        case 0x19:
+            /* use wcode */
+            if( b1 > 31 && b2 > 31 && b1 <= 0x3F && b2 <= 0x3F )
+                if( vbi->verbose )
+                    fprintf( stderr, "char %d (%c),  char %d (%c)\n", b1, 
+                             wccode[b1-32] , b2, wccode[b2-32] );
+
+            break;
+        default:
+            break;
+        }
+    } else if( b1 ) {
+        /* use ccode */
+        if( b1 < 32 ) b1 = 32;
+        if( b2 < 32 ) b2 = 32;
+        if( vbi->verbose )
+            fprintf( stderr, "vbidata: data: %c %c\n", ccode[b1-32], 
+                     ccode[b2-32] );
+        vbiscreen_print( vbi->vs, ccode[b1-32], ccode[b2-32] );
+    }
+
+
+    return 1;
+}				/* Process16b */
+
+int ProcessLine( vbidata_t *vbi, unsigned char *s, int bottom )
+{
+    int w1;
+    /*char *outbuf = NULL;*/
+
+    if( !vbi ) return 0;
+
+    w1 = ccdecode(s);
+
+    return Process16b(vbi, bottom, w1);
+}				/* ProcessLine */
+
+
+
+vbidata_t *vbidata_new_file( const char *filename, vbiscreen_t *vs, 
+                        /*tvtime_osd_t* osd,*/ int verbose  )
+{
+    vbidata_t *vbi = (vbidata_t *) malloc( sizeof( vbidata_t ) );
+    if( !vbi ) {
+        return 0;
+    }
+
+    vbi->fd = open( filename, O_RDONLY );
+    if( vbi->fd < 0 ) {
+        fprintf( stderr, "vbidata: Can't open %s: %s\n",
+                 filename, strerror( errno ) );
+        free( vbi );
+        return 0;
+    }
+
+    vbi->vs = vs;
+    /*vbi->osd = osd;*/
+    vbi->verbose = verbose;
+
+    vbidata_reset( vbi );
+
+    return vbi;
+}
+
+vbidata_t *vbidata_new_line( vbiscreen_t *vs, int verbose )
+{
+    vbidata_t *vbi = (vbidata_t *) malloc( sizeof( vbidata_t ) );
+    if( !vbi ) {
+        return 0;
+    }
+
+    vbi->vs = vs;
+    /*vbi->osd = osd;*/
+    vbi->verbose = verbose;
+
+    vbidata_reset( vbi );
+
+    return vbi;
+}
+
+void vbidata_delete( vbidata_t *vbi )
+{
+    if( !vbi ) return;
+    if( vbi->fd != 0 ) {
+        close( vbi->fd );
+    }
+    free( vbi );
+}
+
+void vbidata_reset( vbidata_t *vbi )
+{
+    if( !vbi ) return;
+
+    vbi->wanttop = 0;
+    vbi->wanttext = 0;
+    vbi->colour = 0xFFFFFFFFU;
+    vbi->row = 0; 
+
+    vbi->ital = 0; 
+    vbi->indent = 0;
+    vbi->ul=0;
+
+    vbi->chan=0;
+
+    vbi->initialised = 0;
+    vbi->enabled = 0;
+
+    memset(vbi->program_desc, 0, 8*sizeof(char*) );
+    vbi->program_name = NULL;
+    vbi->network_name = NULL;
+    vbi->call_letters = NULL;
+    vbi->rating = NULL;
+    vbi->program_type = NULL;
+
+    vbi->start_day = 0;
+    vbi->start_month = 0;
+    vbi->start_min = 0;
+    vbi->start_hour = 0;
+    vbi->length_hour = 0;
+    vbi->length_min = 0;
+    vbi->length_elapsed_hour = 0;
+    vbi->length_elapsed_min = 0;
+    vbi->length_elapsed_sec = 0;
+
+    /*
+    tvtime_osd_set_network_call( vbi->osd, "" );
+    tvtime_osd_set_network_name( vbi->osd, "" );
+    tvtime_osd_set_show_name( vbi->osd, "" );
+    tvtime_osd_set_show_rating( vbi->osd, "" );
+    tvtime_osd_set_show_start( vbi->osd, "" );
+    tvtime_osd_set_show_length( vbi->osd, "" );
+    */
+
+
+
+    vbi->lastcode = 0;
+    vbi->lastcount = 0;
+    vbi->xds_packet[ 0 ] = 0;
+    vbi->xds_cursor = 0;
+    vbiscreen_reset( vbi->vs );
+}
+
+void vbidata_capture_mode( vbidata_t *vbi, int mode )
+{
+    if( !vbi ) return;
+    switch( mode ) {
+    case CAPTURE_OFF:
+        vbi->enabled = 0;
+        break;
+    case CAPTURE_CC1:
+        vbi->wanttop = 1;
+        vbi->wanttext = 0;
+        vbi->chan = 0;
+        vbi->enabled = 1;
+        break;
+    case CAPTURE_CC2:
+        vbi->wanttop = 1;
+        vbi->wanttext = 0;
+        vbi->chan = 1;
+        vbi->enabled = 1;
+        break;
+    case CAPTURE_CC3:
+        vbi->wanttop = 0;
+        vbi->wanttext = 0;
+        vbi->chan = 0;
+        vbi->enabled = 1;
+        break;
+    case CAPTURE_CC4:
+        vbi->wanttop = 0;
+        vbi->wanttext = 0;
+        vbi->chan = 1;
+        vbi->enabled = 1;
+        break;
+    case CAPTURE_T1:
+        vbi->wanttop = 1;
+        vbi->wanttext = 1;
+        vbi->chan = 0;
+        vbi->enabled = 1;
+        break;
+    case CAPTURE_T2:
+        vbi->wanttop = 1;
+        vbi->wanttext = 1;
+        vbi->chan = 1;
+        vbi->enabled = 1;
+        break;
+    case CAPTURE_T3:
+        vbi->wanttop = 0;
+        vbi->wanttext = 1;
+        vbi->chan = 0;
+        vbi->enabled = 1;
+        break;
+    case CAPTURE_T4:
+        vbi->wanttop = 0;
+        vbi->wanttext = 1;
+        vbi->chan = 1;
+        vbi->enabled = 1;
+        break;
+    default:
+        vbi->enabled = 0;
+        break;
+    }
+}
+
+void vbidata_process_frame( vbidata_t *vbi, int printdebug )
+{
+    if( read( vbi->fd, vbi->buf, 65536 ) < 65536 ) {
+        fprintf( stderr, "error, can't read vbi data.\n" );
+        return;
+    }
+
+    ProcessLine( vbi, &vbi->buf[ DO_LINE*2048 ], 0 );
+    ProcessLine( vbi, &vbi->buf[ (16+DO_LINE)*2048 ], 1 );
+}
+
+void vbidata_process_line( vbidata_t *vbi, unsigned char *s, int bottom)
+{
+    ProcessLine( vbi, s, bottom );
+}
+
+void vbidata_process_16b( vbidata_t *vbi, int bottom, int w)
+{
+    Process16b( vbi, bottom, w );
+}
+