/* CC have a maximum rate of 9600 bit/s (per field?) */
#define CC_MAX_DATA_SIZE (2 * 3*600)
+enum
+{
+ CC_PAYLOAD_NONE,
+ CC_PAYLOAD_GA94,
+ CC_PAYLOAD_DVD,
+ CC_PAYLOAD_REPLAYTV,
+ CC_PAYLOAD_SCTE20,
+};
typedef struct
{
/* Which channel are present */
/* */
bool b_reorder;
+ /* */
+ int i_payload_type;
+ int i_payload_other_count;
+
/* CC data per field
* byte[x+0]: field (0/1)
* byte[x+1]: cc data 1
c-> pb_present[i] = false;
c->i_data = 0;
c->b_reorder = false;
+ c->i_payload_type = CC_PAYLOAD_NONE;
+ c->i_payload_other_count = 0;
}
static inline void cc_Exit( cc_data_t *c )
{
static const uint8_t p_cc_replaytv5b[2] = { 0xaa, 0x02 };
static const uint8_t p_cc_scte20[2] = { 0x03, 0x81 };
static const uint8_t p_cc_scte20_old[2] = { 0x03, 0x01 };
- //static const uint8_t p_afd_start[4] = { 0x44, 0x54, 0x47, 0x31 };
if( i_src < 4 )
return;
+ int i_payload_type;
if( !memcmp( p_cc_ga94, p_src, 4 ) && i_src >= 5+1+1+1 && p_src[4] == 0x03 )
{
- /* Extract CC from DVB/ATSC TS */
+ /* CC from DVB/ATSC TS */
+ i_payload_type = CC_PAYLOAD_GA94;
+ }
+ else if( !memcmp( p_cc_dvd, p_src, 4 ) && i_src > 4+1 )
+ {
+ i_payload_type = CC_PAYLOAD_DVD;
+ }
+ else if( i_src >= 2+2 + 2+2 &&
+ ( ( !memcmp( p_cc_replaytv4a, &p_src[0], 2 ) && !memcmp( p_cc_replaytv4b, &p_src[4], 2 ) ) ||
+ ( !memcmp( p_cc_replaytv5a, &p_src[0], 2 ) && !memcmp( p_cc_replaytv5b, &p_src[4], 2 ) ) ) )
+ {
+ i_payload_type = CC_PAYLOAD_REPLAYTV;
+ }
+ else if( ( !memcmp( p_cc_scte20, p_src, 2 ) ||
+ !memcmp( p_cc_scte20_old, p_src, 2 ) ) && i_src > 2 )
+ {
+ i_payload_type = CC_PAYLOAD_SCTE20;
+ }
+ else
+ {
+#if 0
+#define V(x) ( ( x < 0x20 || x >= 0x7f ) ? '?' : x )
+ fprintf( stderr, "-------------- unknown user data " );
+ for( int i = 0; i < i_src; i++ )
+ fprintf( stderr, "%2.2x ", p_src[i] );
+ for( int i = 0; i < i_src; i++ )
+ fprintf( stderr, "%c ", V(p_src[i]) );
+ fprintf( stderr, "\n" );
+#undef V
+#endif
+ return;
+ }
+
+ if( c->i_payload_type != CC_PAYLOAD_NONE && c->i_payload_type != i_payload_type )
+ {
+ c->i_payload_other_count++;
+ if( c->i_payload_other_count < 50 )
+ return;
+ }
+ c->i_payload_type = i_payload_type;
+ c->i_payload_other_count = 0;
+
+ if( i_payload_type == CC_PAYLOAD_GA94 )
+ {
/* cc_data()
* u1 reserved(1)
* u1 process_cc_data_flag
}
c->b_reorder = true;
}
- else if( !memcmp( p_cc_dvd, p_src, 4 ) && i_src > 4+1 )
+ else if( i_payload_type == CC_PAYLOAD_DVD )
{
- /* DVD CC */
const int b_truncate = p_src[4] & 0x01;
const int i_field_first = (p_src[4] & 0x80) ? 0 : 1;
const int i_count_cc2 = (p_src[4] >> 1) & 0xf;
}
c->b_reorder = false;
}
- else if( i_src >= 2+2 + 2+2 &&
- ( ( !memcmp( p_cc_replaytv4a, &p_src[0], 2 ) && !memcmp( p_cc_replaytv4b, &p_src[4], 2 ) ) ||
- ( !memcmp( p_cc_replaytv5a, &p_src[0], 2 ) && !memcmp( p_cc_replaytv5b, &p_src[4], 2 ) ) ) )
+ else if( i_payload_type == CC_PAYLOAD_REPLAYTV )
{
- /* ReplayTV CC */
const uint8_t *cc = &p_src[0];
int i;
if( c->i_data + 2*3 > CC_MAX_DATA_SIZE )
}
c->b_reorder = false;
}
- else if( ( !memcmp( p_cc_scte20, p_src, 2 ) ||
- !memcmp( p_cc_scte20_old, p_src, 2 ) ) && i_src > 2 )
+ else
{
- /* SCTE-20 CC */
bs_t s;
bs_init( &s, &p_src[2], i_src - 2 );
const int i_cc_count = bs_read( &s, 5 );
}
c->b_reorder = true;
}
- else
- {
-#if 0
-#define V(x) ( ( x < 0x20 || x >= 0x7f ) ? '?' : x )
- fprintf( stderr, "-------------- unknown user data " );
- for( int i = 0; i < i_src; i++ )
- fprintf( stderr, "%2.2x ", p_src[i] );
- for( int i = 0; i < i_src; i++ )
- fprintf( stderr, "%c ", V(p_src[i]) );
- fprintf( stderr, "\n" );
-#undef V
-#endif
- /* TODO DVD CC, ... */
- }
}
#endif /* _CC_H */