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[34.83.118.50]) by smtp.gmail.com with ESMTPSA id 190-20020a6219c7000000b005184c9c46dbsm3777778pfz.81.2022.06.02.10.57.08 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Thu, 02 Jun 2022 10:57:08 -0700 (PDT) From: rcombs X-Google-Original-From: rcombs Message-Id: In-Reply-To: References: Date: Thu, 02 Jun 2022 17:57:05 +0000 Fcc: Sent MIME-Version: 1.0 To: ffmpeg-devel@ffmpeg.org Subject: [FFmpeg-devel] [PATCH 1/2] lavfi/colorspace: add ff_matrix_mul_3x3_vec X-BeenThere: ffmpeg-devel@ffmpeg.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: FFmpeg development discussions and patches List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: FFmpeg development discussions and patches Errors-To: ffmpeg-devel-bounces@ffmpeg.org Sender: "ffmpeg-devel" X-TUID: lPJqLlOBRznO From: rcombs 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]);