avfilter/vf_colorchannelmixer: do not use pointer if there is no alpha

Fixes #8288
5 years ago · 4fe4772a58
parent 932913f0b4
commit 4fe4772a58
1 changed files with 2 additions and 2 deletions
--- a/libavfilter/vf_colorchannelmixer.c
+++ b/libavfilter/vf_colorchannelmixer.c
@ -125,7 +125,7 @@ static av_always_inline int filter_slice_rgba_planar(AVFilterContext *ctx, void
            const uint8_t rin = srcr[j];
            const uint8_t gin = srcg[j];
            const uint8_t bin = srcb[j];
-            const uint8_t ain = srca[j];
+            const uint8_t ain = have_alpha ? srca[j] : 0;

            dstr[j] = av_clip_uint8(s->lut[R][R][rin] +
                                    s->lut[R][G][gin] +
@ -184,7 +184,7 @@ static av_always_inline int filter_slice_rgba16_planar(AVFilterContext *ctx, voi
            const uint16_t rin = srcr[j];
            const uint16_t gin = srcg[j];
            const uint16_t bin = srcb[j];
-            const uint16_t ain = srca[j];
+            const uint16_t ain = have_alpha ? srca[j] : 0;

            dstr[j] = av_clip_uintp2(s->lut[R][R][rin] +
                                     s->lut[R][G][gin] +