From d500eff3cce7ab0c6f7101860b633ca955a9f85e Mon Sep 17 00:00:00 2001 From: Lynne Date: Sat, 8 Feb 2020 23:06:09 +0000 Subject: [PATCH] lavu/tx: mention FFT output is not normalized Not even FFTW's output is normalized. This should prevent at least some users from complaining that doing a forward transform followed by an inverse transform has a mismatching output to the original input. --- libavutil/tx.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/libavutil/tx.h b/libavutil/tx.h index d6cdfdf9f2..8b405c0021 100644 --- a/libavutil/tx.h +++ b/libavutil/tx.h @@ -35,7 +35,7 @@ typedef struct AVComplexDouble { enum AVTXType { /** * Standard complex to complex FFT with sample data type AVComplexFloat. - * Scaling currently unsupported + * Output is not 1/len normalized. Scaling currently unsupported. */ AV_TX_FLOAT_FFT = 0, /**