Commit b426aaa9 authored by Laurent Aimar's avatar Laurent Aimar
Browse files

Checked CC parity.

Based on an initial patch of Pdraig Brady.
parent bcd84fbb
......@@ -604,8 +604,22 @@ static void Eia608RollUp( eia608_t *h )
/* Reset current row */
Eia608ClearScreenRow( h, i_screen, h->cursor.i_row );
}
static void Eia608ParseChannel( eia608_t *h, uint8_t d1 )
static void Eia608ParseChannel( eia608_t *h, uint8_t d[2] )
{
/* Check odd parity */
static const int p4[16] = {
0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0
};
if( p4[d[0] & 0xf] == p4[d[0] >> 4] ||
p4[d[1] & 0xf] == p4[ d[1] >> 4] )
{
h->i_channel = -1;
return;
}
/* */
const int d1 = d[0] & 0x7f;
const int d2 = d[1] & 0x7f;
if( d1 == 0x14 )
h->i_channel = 1;
else if( d1 == 0x1c )
......@@ -1069,14 +1083,14 @@ static void Eia608Init( eia608_t *h )
}
static bool 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 d1 = data[0] & 0x7f; /* Removed parity bit */
const uint8_t d2 = data[1] & 0x7f;
bool b_screen_changed = false;
if( d1 == 0 && d2 == 0 )
return false; /* Ignore padding */
return false; /* Ignore padding (parity check are sometimes invalid on them) */
Eia608ParseChannel( h, d1 );
Eia608ParseChannel( h, data );
if( h->i_channel != i_channel_selected )
return false;
//fprintf( stderr, "CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC %x %x\n", data[0], data[1] );
......
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