diff options
author | Ruiling Song <ruiling.song@intel.com> | 2018-06-19 09:57:31 +0800 |
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committer | Mark Thompson <sw@jkqxz.net> | 2018-06-21 01:19:18 +0100 |
commit | 8b8b0e2cd26cf1f522c630859fcbcc62b6493fb9 (patch) | |
tree | 317b7360eeb1df6f7e7c5bb935f70006963e7ae4 /libavfilter/colorspace.c | |
parent | 714da1fd898f83c7bef38fe427af3692917cbcb2 (diff) |
lavfi: add opencl tonemap filter
This filter does HDR(HDR10/HLG) to SDR conversion with tone-mapping.
An example command to use this filter with vaapi codecs:
FFMPEG -init_hw_device vaapi=va:/dev/dri/renderD128 -init_hw_device \
opencl=ocl@va -hwaccel vaapi -hwaccel_device va -hwaccel_output_format \
vaapi -i INPUT -filter_hw_device ocl -filter_complex \
'[0:v]hwmap,tonemap_opencl=t=bt2020:tonemap=linear:format=p010[x1]; \
[x1]hwmap=derive_device=vaapi:reverse=1' -c:v hevc_vaapi -profile 2 OUTPUT
Signed-off-by: Ruiling Song <ruiling.song@intel.com>
Diffstat (limited to 'libavfilter/colorspace.c')
-rw-r--r-- | libavfilter/colorspace.c | 90 |
1 files changed, 90 insertions, 0 deletions
diff --git a/libavfilter/colorspace.c b/libavfilter/colorspace.c new file mode 100644 index 0000000000..7fd7bdf0d9 --- /dev/null +++ b/libavfilter/colorspace.c @@ -0,0 +1,90 @@ +/* + * Copyright (c) 2016 Ronald S. Bultje <rsbultje@gmail.com> + * This file is part of FFmpeg. + * + * FFmpeg is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * FFmpeg is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with FFmpeg; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include "colorspace.h" + + +void invert_matrix3x3(const double in[3][3], double out[3][3]) +{ + double m00 = in[0][0], m01 = in[0][1], m02 = in[0][2], + m10 = in[1][0], m11 = in[1][1], m12 = in[1][2], + m20 = in[2][0], m21 = in[2][1], m22 = in[2][2]; + int i, j; + double det; + + out[0][0] = (m11 * m22 - m21 * m12); + out[0][1] = -(m01 * m22 - m21 * m02); + out[0][2] = (m01 * m12 - m11 * m02); + out[1][0] = -(m10 * m22 - m20 * m12); + out[1][1] = (m00 * m22 - m20 * m02); + out[1][2] = -(m00 * m12 - m10 * m02); + out[2][0] = (m10 * m21 - m20 * m11); + out[2][1] = -(m00 * m21 - m20 * m01); + out[2][2] = (m00 * m11 - m10 * m01); + + det = m00 * out[0][0] + m10 * out[0][1] + m20 * out[0][2]; + det = 1.0 / det; + + for (i = 0; i < 3; i++) { + for (j = 0; j < 3; j++) + out[i][j] *= det; + } +} + +void mul3x3(double dst[3][3], const double src1[3][3], const double src2[3][3]) +{ + int m, n; + + for (m = 0; m < 3; m++) + for (n = 0; n < 3; n++) + dst[m][n] = src2[m][0] * src1[0][n] + + src2[m][1] * src1[1][n] + + src2[m][2] * src1[2][n]; +} +/* + * see e.g. http://www.brucelindbloom.com/index.html?Eqn_RGB_XYZ_Matrix.html + */ +void fill_rgb2xyz_table(const struct PrimaryCoefficients *coeffs, + const struct WhitepointCoefficients *wp, + double rgb2xyz[3][3]) +{ + double i[3][3], sr, sg, sb, zw; + + rgb2xyz[0][0] = coeffs->xr / coeffs->yr; + rgb2xyz[0][1] = coeffs->xg / coeffs->yg; + rgb2xyz[0][2] = coeffs->xb / coeffs->yb; + rgb2xyz[1][0] = rgb2xyz[1][1] = rgb2xyz[1][2] = 1.0; + rgb2xyz[2][0] = (1.0 - coeffs->xr - coeffs->yr) / coeffs->yr; + rgb2xyz[2][1] = (1.0 - coeffs->xg - coeffs->yg) / coeffs->yg; + rgb2xyz[2][2] = (1.0 - coeffs->xb - coeffs->yb) / coeffs->yb; + invert_matrix3x3(rgb2xyz, i); + zw = 1.0 - wp->xw - wp->yw; + sr = i[0][0] * wp->xw + i[0][1] * wp->yw + i[0][2] * zw; + sg = i[1][0] * wp->xw + i[1][1] * wp->yw + i[1][2] * zw; + sb = i[2][0] * wp->xw + i[2][1] * wp->yw + i[2][2] * zw; + rgb2xyz[0][0] *= sr; + rgb2xyz[0][1] *= sg; + rgb2xyz[0][2] *= sb; + rgb2xyz[1][0] *= sr; + rgb2xyz[1][1] *= sg; + rgb2xyz[1][2] *= sb; + rgb2xyz[2][0] *= sr; + rgb2xyz[2][1] *= sg; + rgb2xyz[2][2] *= sb; +} |