[FFmpeg-devel] [PATCH 2/5] avcodec/ccaption_dec: implement tab offset commands

[Aman Gupta]

From: Aman Gupta <aman at tmm1.net>

---
 libavcodec/ccaption_dec.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/libavcodec/ccaption_dec.c b/libavcodec/ccaption_dec.c
index a6d879e..0b4a061 100644
--- a/libavcodec/ccaption_dec.c
+++ b/libavcodec/ccaption_dec.c
@@ -713,6 +713,11 @@ static void process_cc608(CCaptionSubContext *ctx, int64_t pts, uint8_t hi, uint
         /* Standard characters (always in pairs) */
         handle_char(ctx, hi, lo, pts);
         ctx->prev_cmd[0] = ctx->prev_cmd[1] = 0;
+    } else if (hi == 0x17 && lo >= 0x21 && lo <= 0x23) {
+        /* Tab offsets (spacing) */
+        for (int i = 0; i < lo - 0x20; i++) {
+            handle_char(ctx, ' ', 0, pts);
+        }
     } else {
         /* Ignoring all other non data code */
         ff_dlog(ctx, "Unknown command 0x%hhx 0x%hhx\n", hi, lo);
-- 
2.8.1