*****************************************************************************/
#ifndef _CC_H
-#define _C_H 1
+#define _CC_H 1
+
+#include <vlc_bits.h>
/* CC have a maximum rate of 9600 bit/s (per field?) */
#define CC_MAX_DATA_SIZE (2 * 3*600)
typedef struct
{
/* Which channel are present */
- vlc_bool_t pb_present[4];
+ bool pb_present[4];
+
+ /* */
+ bool b_reorder;
/* CC data per field
* byte[x+0]: field (0/1)
uint8_t p_data[CC_MAX_DATA_SIZE];
} cc_data_t;
-static inline int cc_Channel( int i_field, const uint8_t p_data[2] )
-{
- const uint8_t d = p_data[0] & 0x7f;
- if( i_field != 0 && i_field != 1 )
- return -1;
- if( d == 0x14 )
- return 2*i_field + 0;
- else if( d == 0x1c )
- return 2*i_field + 1;
- /* unknown(middle of a command) or not cc channel */
- return -1;
-}
static inline void cc_Init( cc_data_t *c )
{
int i;
for( i = 0; i < 4; i++ )
- c-> pb_present[i] = VLC_FALSE;
+ c-> pb_present[i] = false;
c->i_data = 0;
+ c->b_reorder = false;
}
static inline void cc_Exit( cc_data_t *c )
{
+ VLC_UNUSED(c);
return;
}
static inline void cc_Flush( cc_data_t *c )
{
c->i_data = 0;
}
-static inline void cc_Extract( cc_data_t *c, const uint8_t *p_src, int i_src )
+
+static inline void cc_AppendData( cc_data_t *c, int i_field, const uint8_t cc[2] )
+{
+ if( i_field == 0 || i_field == 1 )
+ {
+ c->pb_present[2*i_field+0] =
+ c->pb_present[2*i_field+1] = true;
+ }
+
+ c->p_data[c->i_data++] = i_field;
+ c->p_data[c->i_data++] = cc[0];
+ c->p_data[c->i_data++] = cc[1];
+}
+
+static inline void cc_Extract( cc_data_t *c, bool b_top_field_first, const uint8_t *p_src, int i_src )
{
static const uint8_t p_cc_ga94[4] = { 0x47, 0x41, 0x39, 0x34 };
+ static const uint8_t p_cc_dvd[4] = { 0x43, 0x43, 0x01, 0xf8 };
+ static const uint8_t p_cc_replaytv4a[2] = { 0xbb, 0x02 };
+ static const uint8_t p_cc_replaytv4b[2] = { 0xcc, 0x02 };
+ static const uint8_t p_cc_replaytv5a[2] = { 0x99, 0x02 };
+ 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;
- /* cc_data()
- * u1 reserved(1)
- * u1 process_cc_data_flag
- * u1 additional_data_flag
- * u5 cc_count
- * u8 reserved(1111 1111)
- * for cc_count
- * u5 marker bit(1111 1)
- * u1 cc_valid
- * u2 cc_type
- * u8 cc_data_1
- * u8 cc_data_2
- * u8 marker bit(1111 1111)
- * if additional_data_flag
- * unknown
- */
- /* cc_type:
- * 0x00: field 1
- * 0x01: field 2
- */
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_data()
+ * u1 reserved(1)
+ * u1 process_cc_data_flag
+ * u1 additional_data_flag
+ * u5 cc_count
+ * u8 reserved(1111 1111)
+ * for cc_count
+ * u5 marker bit(1111 1)
+ * u1 cc_valid
+ * u2 cc_type
+ * u8 cc_data_1
+ * u8 cc_data_2
+ * u8 marker bit(1111 1111)
+ * if additional_data_flag
+ * unknown
+ */
+ /* cc_type:
+ * 0x00: field 1
+ * 0x01: field 2
+ */
const uint8_t *cc = &p_src[5];
const int i_count_cc = cc[0]&0x1f;
int i;
for( i = 0; i < i_count_cc; i++, cc += 3 )
{
int i_field = cc[0] & 0x03;
- int i_channel;
if( ( cc[0] & 0xfc ) != 0xfc )
continue;
if( i_field != 0 && i_field != 1 )
if( c->i_data + 3 > CC_MAX_DATA_SIZE )
continue;
- i_channel = cc_Channel( i_field, &cc[1] );
- if( i_channel >= 0 && i_channel < 4 )
- c->pb_present[i_channel] = VLC_TRUE;
+ cc_AppendData( c, i_field, &cc[1] );
+ }
+ c->b_reorder = true;
+ }
+ else if( !memcmp( p_cc_dvd, p_src, 4 ) && i_src > 4+1 )
+ {
+ /* 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;
+ const uint8_t *cc = &p_src[5];
+ int i;
+
+ if( i_src < 4+1+6*i_count_cc2 - ( b_truncate ? 3 : 0) )
+ return;
+ for( i = 0; i < i_count_cc2; i++ )
+ {
+ int j;
+ for( j = 0; j < 2; j++, cc += 3 )
+ {
+ const int i_field = j == i_field_first ? 0 : 1;
+
+ if( b_truncate && i == i_count_cc2 - 1 && j == 1 )
+ break;
+ if( cc[0] != 0xff && cc[0] != 0xfe )
+ continue;
+ if( c->i_data + 3 > CC_MAX_DATA_SIZE )
+ continue;
+
+ cc_AppendData( c, i_field, &cc[1] );
+ }
+ }
+ 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 ) ) ) )
+ {
+ /* ReplayTV CC */
+ const uint8_t *cc = &p_src[0];
+ int i;
+ if( c->i_data + 2*3 > CC_MAX_DATA_SIZE )
+ return;
+
+ for( i = 0; i < 2; i++, cc += 4 )
+ {
+ const int i_field = i == 0 ? 1 : 0;
+
+ cc_AppendData( c, i_field, &cc[2] );
+ }
+ c->b_reorder = false;
+ }
+ else if( ( !memcmp( p_cc_scte20, p_src, 2 ) ||
+ !memcmp( p_cc_scte20_old, p_src, 2 ) ) && i_src > 2 )
+ {
+ /* SCTE-20 CC */
+ bs_t s;
+ bs_init( &s, &p_src[2], i_src - 2 );
+ const int i_cc_count = bs_read( &s, 5 );
+ for( int i = 0; i < i_cc_count; i++ )
+ {
+ bs_skip( &s, 2 );
+ const int i_field_idx = bs_read( &s, 2 );
+ bs_skip( &s, 5 );
+ uint8_t cc[2];
+ for( int j = 0; j < 2; j++ )
+ {
+ cc[j] = 0;
+ for( int k = 0; k < 8; k++ )
+ cc[j] |= bs_read( &s, 1 ) << k;
+ }
+ bs_skip( &s, 1 );
+
+ if( i_field_idx == 0 )
+ continue;
+ if( c->i_data + 2*3 > CC_MAX_DATA_SIZE )
+ continue;
+
+ /* 1,2,3 -> 0,1,0. I.E. repeated field 3 is merged with field 1 */
+ int i_field = ((i_field_idx - 1) & 1);
+ if (!b_top_field_first)
+ i_field ^= 1;
- c->p_data[c->i_data++] = i_field;
- c->p_data[c->i_data++] = cc[1];
- c->p_data[c->i_data++] = cc[2];
+ cc_AppendData( c, i_field, &cc[0] );
}
+ 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, ... */
}
}
projects / vlc / blobdiff