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Code Issues Releases Activity

lavc/ccaption_dec: implement font styles

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This commit is contained in:
Aman Gupta 2016-01-08 19:52:09 -08:00 committed by Clément Bœsch
parent 086093c77c
commit b7e64be8fb
2 changed files with 52 additions and 7 deletions
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55
libavcodec/ccaption_dec.c
View File

@ -172,9 +172,11 @@ static int write_char(CCaptionSubContext *ctx, struct Screen *screen, char ch)
{
uint8_t col = ctx->cursor_column;
char *row = screen->characters[ctx->cursor_row];
char *font = screen->fonts[ctx->cursor_row];
if (col < SCREEN_COLUMNS) {
row[col] = ch;
font[col] = ctx->cursor_font;
if (ch) ctx->cursor_column++;
return 0;
}
@ -283,17 +285,60 @@ static int capture_screen(CCaptionSubContext *ctx)
int i;
int ret = 0;
struct Screen *screen = ctx->screen + ctx->active_screen;
enum cc_font prev_font = CCFONT_REGULAR;
av_bprint_clear(&ctx->buffer);
for (i = 0; screen->row_used && i < SCREEN_ROWS; i++)
{
if (CHECK_FLAG(screen->row_used, i)) {
char *str = screen->characters[i];
/* skip space */
while (*str == ' ')
str++;
char *row = screen->characters[i];
char *font = screen->fonts[i];
int j = 0;
av_bprintf(&ctx->buffer, "%s\\N", str);
/* skip leading space */
while (row[j] == ' ')
j++;
for (; j < SCREEN_COLUMNS; j++) {
if (row[j] == 0)
break;
const char *e_tag = "", *s_tag = "";
if (prev_font != font[j]) {
switch (prev_font) {
case CCFONT_ITALICS:
e_tag = "{/i0}";
break;
case CCFONT_UNDERLINED:
e_tag = "{/u0}";
break;
case CCFONT_UNDERLINED_ITALICS:
e_tag = "{/u0}{/i0}";
break;
}
switch (font[j]) {
case CCFONT_ITALICS:
s_tag = "{/i1}";
break;
case CCFONT_UNDERLINED:
s_tag = "{/u1}";
break;
case CCFONT_UNDERLINED_ITALICS:
s_tag = "{/u1}{/i1}";
break;
}
}
prev_font = font[j];
av_bprintf(&ctx->buffer, "%s%s%c", e_tag, s_tag, row[j]);
ret = av_bprint_is_complete(&ctx->buffer);
if (ret == 0) {
ret = AVERROR(ENOMEM);
break;
}
}
av_bprintf(&ctx->buffer, "\\N");
ret = av_bprint_is_complete(&ctx->buffer);
if (ret == 0) {
ret = AVERROR(ENOMEM);

4
tests/ref/fate/sub-cc
View File

@ -10,5 +10,5 @@ Style: Default,Arial,16,&Hffffff,&Hffffff,&H0,&H0,0,0,0,0,100,100,0,0,1,1,0,2,10
[Events]
Format: Layer, Start, End, Style, Name, MarginL, MarginR, MarginV, Effect, Text
Dialogue: 0,0:00:12.36,0:00:40.83,Default,,0,0,0,,( inaudible radio chatter )
Dialogue: 0,0:00:40.83,0:00:59.07,Default,,0,0,0,,( inaudible radio chatter )\N>> Safety remains our number one
Dialogue: 0,0:00:12.36,0:00:40.83,Default,,0,0,0,,({/i1} inaudible radio chatter{/i0} )
Dialogue: 0,0:00:40.83,0:00:59.07,Default,,0,0,0,,({/i1} inaudible radio chatter{/i0} )\N>> Safety remains our number one