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Code Issues Releases Activity

lavc/ccaption_dec: simplify by passing screen into write_char()

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This commit is contained in:
Aman Gupta 2016-01-08 19:21:16 -08:00 committed by Clément Bœsch
parent 080de371d8
commit 811ce8f9c5
1 changed files with 11 additions and 13 deletions
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22
libavcodec/ccaption_dec.c
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@ -168,8 +168,11 @@ static av_cold int close_decoder(AVCodecContext *avctx)
/**
* @param ctx closed caption context just to print log
*/
static int write_char(CCaptionSubContext *ctx, char *row, uint8_t col, char ch)
static int write_char(CCaptionSubContext *ctx, struct Screen *screen, char ch)
{
uint8_t col = ctx->cursor_column;
char *row = screen->characters[ctx->cursor_row];
if (col < SCREEN_COLUMNS) {
row[col] = ch;
return 0;
@ -319,7 +322,6 @@ static void handle_textattr(CCaptionSubContext *ctx, uint8_t hi, uint8_t lo)
int i = lo - 0x20;
int ret;
struct Screen *screen = get_writing_screen(ctx);
char *row = screen->characters[ctx->cursor_row];
if (i >= 32)
return;
@ -328,7 +330,7 @@ static void handle_textattr(CCaptionSubContext *ctx, uint8_t hi, uint8_t lo)
ctx->cursor_font = pac2_attribs[i][1];
SET_FLAG(screen->row_used, ctx->cursor_row);
ret = write_char(ctx, row, ctx->cursor_column, ' ');
ret = write_char(ctx, screen, ' ');
if (ret == 0)
ctx->cursor_column++;
}
@ -340,7 +342,6 @@ static void handle_pac(CCaptionSubContext *ctx, uint8_t hi, uint8_t lo)
};
const int index = ( (hi<<1) & 0x0e) | ( (lo>>5) & 0x01 );
struct Screen *screen = get_writing_screen(ctx);
char *row;
int indent, i, ret;
if (row_map[index] <= 0) {
@ -355,9 +356,8 @@ static void handle_pac(CCaptionSubContext *ctx, uint8_t hi, uint8_t lo)
ctx->cursor_font = pac2_attribs[lo][1];
ctx->cursor_column = 0;
indent = pac2_attribs[lo][2];
row = screen->characters[ctx->cursor_row];
for (i = 0; i < indent; i++) {
ret = write_char(ctx, row, ctx->cursor_column, ' ');
ret = write_char(ctx, screen, ' ');
if (ret == 0)
ctx->cursor_column++;
}
@ -384,28 +384,26 @@ static void handle_eoc(CCaptionSubContext *ctx, int64_t pts)
static void handle_delete_end_of_row(CCaptionSubContext *ctx, char hi, char lo)
{
struct Screen *screen = get_writing_screen(ctx);
char *row = screen->characters[ctx->cursor_row];
write_char(ctx, row, ctx->cursor_column, 0);
write_char(ctx, screen, 0);
}
static void handle_char(CCaptionSubContext *ctx, char hi, char lo, int64_t pts)
{
struct Screen *screen = get_writing_screen(ctx);
char *row = screen->characters[ctx->cursor_row];
int ret;
SET_FLAG(screen->row_used, ctx->cursor_row);
ret = write_char(ctx, row, ctx->cursor_column, hi);
ret = write_char(ctx, screen, hi);
if (ret == 0)
ctx->cursor_column++;
if (lo) {
ret = write_char(ctx, row, ctx->cursor_column, lo);
ret = write_char(ctx, screen, lo);
if (ret == 0)
ctx->cursor_column++;
}
write_char(ctx, row, ctx->cursor_column, 0);
write_char(ctx, screen, 0);
/* reset prev command since character can repeat */
ctx->prev_cmd[0] = 0;