diff options
| -rw-r--r-- | sub_cc.c | 45 |
1 files changed, 45 insertions, 0 deletions
@@ -37,6 +37,14 @@ static unsigned int cursor_pos=0; static int inited=0; +#define CC_ROLLON 1 +#define CC_ROLLUP 2 + +static int cc_mode=CC_ROLLON; +static int cc_lines=4; ///< number of visible rows in CC roll-up mode, not used in CC roll-on mode + +static void display_buffer(subtitle * buf); + static void build_char_table(void) { int i; @@ -64,6 +72,26 @@ static void clear_buffer(subtitle *buf) } +/** + \brief scroll buffer one line up + \param buf buffer to scroll +*/ +static void scroll_buffer(subtitle* buf) +{ + int i; + + while(buf->lines > cc_lines) + { + if(buf->text[0]) free(buf->text[0]); + + for(i = 0; i < (buf->lines - 1); i++) buf->text[i] = buf->text[i+1]; + + buf->text[buf->lines-1] = NULL; + buf->lines--; + } +} + + void subcc_init(void) { int i; @@ -90,7 +118,13 @@ static void append_char(char c) if(c=='\n') { if(cursor_pos>0 && bb->lines < SUB_MAX_TEXT) + { bb->lines++;cursor_pos=0; + if(cc_mode==CC_ROLLUP){ //Carriage return - scroll buffer one line up + bb->text[bb->lines - 1]=calloc(1, CC_MAX_LINE_LENGTH); + scroll_buffer(bb); + } + } } else { @@ -101,6 +135,8 @@ static void append_char(char c) } bb->text[bb->lines - 1][cursor_pos++]=c; } + //In CC roll-up mode data should be shown immediately + if(cc_mode==CC_ROLLUP) display_buffer(bb); } @@ -159,6 +195,15 @@ static void cc_decode_EIA608(unsigned short int data) case 0x14: switch(c2) { + case 0x00: //CC roll-on mode + cc_mode=CC_ROLLON; + break; + case 0x25: //CC roll-up, 2 rows + case 0x26: //CC roll-up, 3 rows + case 0x27: //CC roll-up, 4 rows + cc_lines=c2-0x23; + cc_mode=CC_ROLLUP; + break; case 0x2C: display_buffer(NULL); //EDM clear_buffer(fb); break; case 0x2d: append_char('\n'); //carriage return |