[FFmpeg-devel] [PATCH 1/2] Support for large boxes(>32 bit) for 3gpp timed text

[Niklesh Lalwani]

From: Niklesh <niklesh.lalwani at iitb.ac.in>

Signed-off-by: Niklesh <niklesh.lalwani at iitb.ac.in>
---
 libavcodec/movtextdec.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/libavcodec/movtextdec.c b/libavcodec/movtextdec.c
index ab4efdb..a5d995d 100644
--- a/libavcodec/movtextdec.c
+++ b/libavcodec/movtextdec.c
@@ -96,7 +96,9 @@ static int mov_text_decode_frame(AVCodecContext *avctx,
     char *ptr = avpkt->data;
     char *end;
     //char *ptr_temp;
-    int text_length, tsmb_type, style_entries, tsmb_size;
+    int text_length, style_entries;
+    uint32_t tsmb_type;
+    uint64_t tsmb_size;
     int **style_start = {0,};
     int **style_end = {0,};
     int **style_flags = {0,};
@@ -145,6 +147,11 @@ static int mov_text_decode_frame(AVCodecContext *avctx,
             tsmb_type = AV_RB32(tsmb);
             tsmb += 4;
 
+            if (tsmb_size == 0xFFFFFFFF) {
+                tsmb_size = AV_RB64(tsmb);
+                tsmb += 8;
+            }
+
             if (tsmb_type == MKBETAG('s','t','y','l')) {
                 style_entries = AV_RB16(tsmb);
                 tsmb += 2;
-- 
1.9.1