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lavfi/af_pan: fix sign handling in channel coefficient parser

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When a channel formula ends with a subtraction, the next formula will
otherwise have its first coefficient negated.

(cherry picked from commit 4f4e19914ddca5096bf7639c7c99a9045e436e8b)
This commit is contained in:
Michael Roitzsch 2017-11-18 13:33:08 +01:00 committed by Tobias Rapp
parent 67c0793835
commit 752659ff1e
1 changed files with 1 additions and 0 deletions
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libavfilter/af_pan.c
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@ -166,6 +166,7 @@ static av_cold int init(AVFilterContext *ctx)
goto fail;
}
/* gains */
sign = 1;
while (1) {
gain = 1;
if (sscanf(arg, "%lf%n *%n", &gain, &len, &len))