[FFmpeg-devel] [PATCH v2 4/9] lavc/ccaption_dec: default rollup to row 10

[Aman Gupta]

From: Aman Gupta <aman at tmm1.net>

This ensures that captions are written towards the bottom of the screen
when tuning into mid-stream. The row will be reset on the receipt of the
next PAC command. Row 10 was chosen as it corresponds to the value of
"0" in a PAC (see row_map in handle_pac()).
---
 libavcodec/ccaption_dec.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/libavcodec/ccaption_dec.c b/libavcodec/ccaption_dec.c
index 6bdd754..8c913fe 100644
--- a/libavcodec/ccaption_dec.c
+++ b/libavcodec/ccaption_dec.c
@@ -148,6 +148,7 @@ static av_cold int init_decoder(AVCodecContext *avctx)
     /* taking by default roll up to 2 */
     ctx->mode = CCMODE_ROLLUP;
     ctx->rollup = 2;
+    ctx->cursor_row = 10;
     ret = ff_ass_subtitle_header(avctx, "Monospace",
                                  ASS_DEFAULT_FONT_SIZE,
                                  ASS_DEFAULT_COLOR,
@@ -185,7 +186,7 @@ static void flush_decoder(AVCodecContext *avctx)
     ctx->prev_cmd[1] = 0;
     ctx->mode = CCMODE_ROLLUP;
     ctx->rollup = 2;
-    ctx->cursor_row = 0;
+    ctx->cursor_row = 10;
     ctx->cursor_column = 0;
     ctx->cursor_font = 0;
     ctx->cursor_color = 0;
-- 
2.5.3