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new 338889c0d9 avfilter/vf_scale_d3d12: fix integer overflow in input
framerate calculation
338889c0d9 is described below
commit 338889c0d9794782ea1b247bce934df50e5ade8c
Author: Timo Rothenpieler <[email protected]>
AuthorDate: Mon Dec 8 14:18:36 2025 +0100
Commit: Timo Rothenpieler <[email protected]>
CommitDate: Mon Dec 8 14:22:16 2025 +0100
avfilter/vf_scale_d3d12: fix integer overflow in input framerate calculation
Also removes pointless intermediate variables that caused
the overflow and truncation to happen in the first place.
Fixes #YWH-PGM40646-1
---
libavfilter/vf_scale_d3d12.c | 10 ++--------
1 file changed, 2 insertions(+), 8 deletions(-)
diff --git a/libavfilter/vf_scale_d3d12.c b/libavfilter/vf_scale_d3d12.c
index 6950feb32b..8066bd0725 100644
--- a/libavfilter/vf_scale_d3d12.c
+++ b/libavfilter/vf_scale_d3d12.c
@@ -155,8 +155,6 @@ static DXGI_COLOR_SPACE_TYPE get_dxgi_colorspace(enum
AVColorSpace colorspace, e
static AVRational get_input_framerate(AVFilterContext *ctx, AVFilterLink
*inlink, AVFrame *in)
{
- int64_t duration_scaled;
- int64_t time_base_den;
AVRational framerate = {0, 0};
if (in->duration > 0 && inlink->time_base.num > 0 && inlink->time_base.den
> 0) {
@@ -164,13 +162,9 @@ static AVRational get_input_framerate(AVFilterContext
*ctx, AVFilterLink *inlink
* Calculate framerate from frame duration and timebase
* framerate = 1 / (duration * timebase)
*/
- duration_scaled = in->duration * inlink->time_base.num;
- time_base_den = inlink->time_base.den;
- framerate.num = time_base_den;
- framerate.den = duration_scaled;
- /* Reduce the fraction */
av_reduce(&framerate.num, &framerate.den,
- framerate.num, framerate.den, INT_MAX);
+ inlink->time_base.den, in->duration * inlink->time_base.num,
+ INT_MAX);
} else if (inlink->time_base.num > 0 && inlink->time_base.den > 0) {
/* Estimate from timebase (inverse of timebase is often the framerate)
*/
framerate.num = inlink->time_base.den;
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