Adds option to ZVBI ntsc-cc.c to output null frames in raw closed caption dump. This allows timing of captions to be correctly preserved.

zvbi-ntsc-cc-rawnull.patch

diff --git a/contrib/ntsc-cc.c b/contrib/ntsc-cc.c
index 066ef07..9a06ef5 100644
--- a/contrib/ntsc-cc.c
+++ b/contrib/ntsc-cc.c
@@ -124,6 +124,7 @@ char usesen=0;
 char debugwin=0;
 char test=0;
 char usewebtv=1;
+char rawnull=0;
 
 char rawline=-1;
 
@@ -706,7 +707,7 @@ static int print_raw(int data)
 
 	// this is just null data with two parity bits
 	// 100000010000000 = 0x8080
-	if (data == 0x8080)
+	if (data == 0x8080 && !rawnull)
 	  return -1;
 
 	b1 = data & 0x7f;
@@ -1244,6 +1245,7 @@ Options:\n\
 -l | --channel number       Select caption channel 1 ... 4 [no filter]\n\
 -p | --plain-ascii          Print plain ASCII, else insert VT.100 color,\n\
                             italic and underline control codes\n\
+-n | --rawnull              Include null frames in raw output\n\
 -r | --raw line-number      Dump raw VBI data\n\
 -s | --sentences            Decode caption by sentences\n\
 -v | --verbose              Increase verbosity\n\
@@ -1260,7 +1262,7 @@ Options:\n\
 }
 
 static const char
-short_options [] = "?1:2:3:4:5:6:7:8:bcd:f:hkl:pr:stvwxC:RSX:";
+short_options [] = "?1:2:3:4:5:6:7:8:bcd:f:hkl:npr:stvwxC:RSX:";
 
 #ifdef HAVE_GETOPT_LONG
 static const struct option
@@ -1281,6 +1283,7 @@ long_options [] = {
 	{ "help",	 no_argument,		NULL,		'h' },
 	{ "keyword",	 required_argument,	NULL,		'k' },
 	{ "channel",	 required_argument,	NULL,		'l' },
+	{ "rawnull",	 no_argument,		NULL,		'n' },
 	{ "plain-ascii", no_argument,		NULL,		'p' },
 	{ "raw",	 required_argument,	NULL,		'r' },
 	{ "sentences",	 no_argument,		NULL,		's' },
@@ -1433,6 +1436,10 @@ int main(int argc,char **argv)
 			keyword[keywords++]=optarg;
 			break;
 
+		case 'n':
+			rawnull=1;
+			break;
+
 		case 'p':
 			plain=1;
 			xds_info_prefix = "% ";