Every code point in the BMP is representable with at most three bytes in UTF-8 and every code point not in the BMP takes four bytes. For each of the latter, the encoding of UTF-16 takes as many bytes; for each of the former, it takes at most 3/2 as many. Therefore one can decrease the size of the buffer allocated here.
Showing the changes to libavformat (1 of 1 file). Show all
Unified · Split
| @@ -468,7 +468,7 @@ static void get_tag(AVFormatContext *s, AVIOContext *pb, const char *key, int ty · 467 unmodified lines | ||
| 468 | 468 | return; |
| 469 | 469 | } |
| 470 | 470 | |
| 471 | − buf_size = FFMIN(FFMAX(2U * length, LEN_PRETTY_GUID) + 1, INT_MAX); | |
| 471 | + buf_size = FFMIN(FFMAX(length + length / 2U, LEN_PRETTY_GUID) + 1, INT_MAX); | |
| 472 | 472 | buf = av_malloc(buf_size); |
| 473 | 473 | if (!buf) |
| 474 | 474 | return; |