From a5b3b65dc067b900be55d7edcea3cecd65a133f0 Mon Sep 17 00:00:00 2001 From: rcombs Date: Thu, 2 Jun 2022 02:59:19 -0500 Subject: [PATCH] lavfi/colorspace: add ff_matrix_mul_3x3_vec Signed-off-by: rcombs --- libavfilter/colorspace.c | 11 +++++++++++ libavfilter/colorspace.h | 1 + 2 files changed, 12 insertions(+) diff --git a/libavfilter/colorspace.c b/libavfilter/colorspace.c index 7f74fe5113..f0bd14be18 100644 --- a/libavfilter/colorspace.c +++ b/libavfilter/colorspace.c @@ -62,6 +62,17 @@ void ff_matrix_mul_3x3(double dst[3][3], src2[m][1] * src1[1][n] + src2[m][2] * src1[2][n]; } + +void ff_matrix_mul_3x3_vec(double dst[3], const double vec[3], const double mat[3][3]) +{ + int m; + + for (m = 0; m < 3; m++) + dst[m] = vec[0] * mat[m][0] + + vec[1] * mat[m][1] + + vec[2] * mat[m][2]; +} + /* * see e.g. http://www.brucelindbloom.com/index.html?Eqn_RGB_XYZ_Matrix.html */ diff --git a/libavfilter/colorspace.h b/libavfilter/colorspace.h index 879518d242..4d98b1da2e 100644 --- a/libavfilter/colorspace.h +++ b/libavfilter/colorspace.h @@ -29,6 +29,7 @@ void ff_matrix_invert_3x3(const double in[3][3], double out[3][3]); void ff_matrix_mul_3x3(double dst[3][3], const double src1[3][3], const double src2[3][3]); +void ff_matrix_mul_3x3_vec(double dst[3], const double vec[3], const double mat[3][3]); void ff_fill_rgb2xyz_table(const AVPrimaryCoefficients *coeffs, const AVWhitepointCoefficients *wp, double rgb2xyz[3][3]);