This will fix following compile warning:
libavutil/video_enc_params.c: In function ‘av_video_enc_params_alloc’:
libavutil/video_enc_params.c:36:19: warning: comparison is always false due to
limited range of data type [-Wtype-limits]
36 | if (nb_blocks > SIZE_MAX / sizeof(AVVideoBlockParams) ||
| ^
Suppose a is "nb_blocks > SIZE_MAX / sizeof(AVVideoBlockParams))"
b is "nb_blocks * sizeof(AVVideoBlockParams) > SIZE_MAX - sizw"
If a is true, b is true.
If a is false, the expression depends on b.
No matter a is true or not, it we only need check b.
---
libavutil/video_enc_params.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/libavutil/video_enc_params.c b/libavutil/video_enc_params.c
index c46c0f1dc6..31bce6a277 100644
--- a/libavutil/video_enc_params.c
+++ b/libavutil/video_enc_params.c
@@ -33,8 +33,7 @@ AVVideoEncParams *av_video_enc_params_alloc(enum
AVVideoEncParamsType type,
size_t size;
size = sizeof(*par);
- if (nb_blocks > SIZE_MAX / sizeof(AVVideoBlockParams) ||
- nb_blocks * sizeof(AVVideoBlockParams) > SIZE_MAX - size)
+ if (nb_blocks * sizeof(AVVideoBlockParams) > SIZE_MAX - size)
return NULL;
size += sizeof(AVVideoBlockParams) * nb_blocks;
--
2.25.1
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