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fftools/ffplay: do not write out of rdft visualization texture 

If the window is resized it was possible that xpos pointed outside the
visualization texture. By rearranging the overflow check we make sure this (and
a crash) does not happen.

We also don't have to use xleft for start position, as that is 0 anyways, and
if we ever want to take into account xleft then the texture should be
positioned accordingly when rendering.

Signed-off-by: Marton Balint <cus@passwd.hu>
(cherry picked from commit 573f05a753)
This commit is contained in:
Marton Balint 2021-03-03 23:23:10 +01:00
parent 4383b9e8a3
commit 4bbcaf7559
1 changed files with 2 additions and 2 deletions
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4
fftools/ffplay.c
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@ -1151,6 +1151,8 @@ static void video_audio_display(VideoState *s)
if (realloc_texture(&s->vis_texture, SDL_PIXELFORMAT_ARGB8888, s->width, s->height, SDL_BLENDMODE_NONE, 1) < 0)
return;
if (s->xpos >= s->width)
s->xpos = 0;
nb_display_channels= FFMIN(nb_display_channels, 2);
if (rdft_bits != s->rdft_bits) {
av_rdft_end(s->rdft);
@ -1200,8 +1202,6 @@ static void video_audio_display(VideoState *s)
}
if (!s->paused)
s->xpos++;
if (s->xpos >= s->width)
s->xpos= s->xleft;
}
}