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vo_opengl: fix some undefined behavior

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The gl_timer_last_us() function could access samples[-1]. Fix by
coercing to unsigned, so the % will put it into index [0,max). The
real value returned in this corner case doesn't mean too much, I
guess.
This commit is contained in:
wm4 2017-03-18 20:22:50 +01:00
parent c3248369ac
commit 03933f3564
1 changed files with 1 additions and 1 deletions
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video/out/opengl/utils.c
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@ -1061,7 +1061,7 @@ void gl_sc_generate(struct gl_shader_cache *sc)
// How many samples to keep around, for the sake of average and peak
// calculations. This corresponds to a few seconds (exact time variable)
#define QUERY_SAMPLE_SIZE 256
#define QUERY_SAMPLE_SIZE 256u
struct gl_timer {
GL *gl;