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mpv
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Basic support for Closed Captioning Roll-up mode. 

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@24858 b3059339-0415-0410-9bf9-f77b7e298cf2
This commit is contained in:
voroshil 2007-10-27 04:46:01 +00:00
parent 354538912c
commit a8c696d961
1 changed files with 45 additions and 0 deletions
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45
sub_cc.c
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@ -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