Minor speed increase, end is calculated before entering parse_str_int(),
so let's take advantage of the value and avoid recalculating twice more.
This also allows parse_str_int() to work with file size larger than int.
Signed-off-by: Joe Da Silva <digi...@joescat.com>
---
libavcodec/xbmdec.c | 8 +++-----
1 file changed, 3 insertions(+), 5 deletions(-)
diff --git a/libavcodec/xbmdec.c b/libavcodec/xbmdec.c
index d19bdaee23..2ce70204cf 100644
--- a/libavcodec/xbmdec.c
+++ b/libavcodec/xbmdec.c
@@ -37,10 +37,8 @@ static int convert(uint8_t x)
return x;
}
-static int parse_str_int(const uint8_t *p, int len, const uint8_t *key)
+static int parse_str_int(const uint8_t *p, const uint8_t *end, const uint8_t
*key)
{
- const uint8_t *end = p + len;
-
for(; p<end - strlen(key); p++) {
if (!memcmp(p, key, strlen(key)))
break;
@@ -72,8 +70,8 @@ static int xbm_decode_frame(AVCodecContext *avctx, void *data,
avctx->pix_fmt = AV_PIX_FMT_MONOWHITE;
end = avpkt->data + avpkt->size;
- width = parse_str_int(avpkt->data, avpkt->size, "_width");
- height = parse_str_int(avpkt->data, avpkt->size, "_height");
+ width = parse_str_int(avpkt->data, end, "_width");
+ height = parse_str_int(avpkt->data, end, "_height");
if ((ret = ff_set_dimensions(avctx, width, height)) < 0)
return ret;
--
2.30.0
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