[FFmpeg-devel] [RFC] lavfi: add opencl tonemap filter.
Ruiling Song
ruiling.song at intel.com
Fri May 4 10:32:58 EEST 2018
It basically does hdr to sdr conversion with tonemapping.
Signed-off-by: Ruiling Song <ruiling.song at intel.com>
---
This patch tries to add a filter to do hdr to sdr conversion with tonemapping.
The filter does all the job of tonemapping in one pass, which is quite different from the vf_tonemap.c
I choose this way because I think this would introduce less memory access.
And I find that tonemaping shares lots of code with colorspace conversion.
So I move color space related code into seprated files (both OpenCL kernel and host code).
I am not sure whether the design seems OK?
Is there anybody would like to give some comments on the overall design or implementation details?
Thanks!
Ruiling
configure | 1 +
libavfilter/Makefile | 2 +
libavfilter/allfilters.c | 1 +
libavfilter/colorspace_basic.c | 89 +++++++
libavfilter/colorspace_basic.h | 40 +++
libavfilter/opencl/colorspace_basic.cl | 137 ++++++++++
libavfilter/opencl/tonemap.cl | 136 ++++++++++
libavfilter/opencl_source.h | 2 +
libavfilter/vf_tonemap_opencl.c | 472 +++++++++++++++++++++++++++++++++
9 files changed, 880 insertions(+)
create mode 100644 libavfilter/colorspace_basic.c
create mode 100644 libavfilter/colorspace_basic.h
create mode 100644 libavfilter/opencl/colorspace_basic.cl
create mode 100644 libavfilter/opencl/tonemap.cl
create mode 100644 libavfilter/vf_tonemap_opencl.c
diff --git a/configure b/configure
index 7f199c6..b9e464d 100755
--- a/configure
+++ b/configure
@@ -3395,6 +3395,7 @@ tinterlace_filter_deps="gpl"
tinterlace_merge_test_deps="tinterlace_filter"
tinterlace_pad_test_deps="tinterlace_filter"
tonemap_filter_deps="const_nan"
+tonemap_opencl_filter_deps="opencl"
unsharp_opencl_filter_deps="opencl"
uspp_filter_deps="gpl avcodec"
vaguedenoiser_filter_deps="gpl"
diff --git a/libavfilter/Makefile b/libavfilter/Makefile
index 3454f25..7a1b0e8 100644
--- a/libavfilter/Makefile
+++ b/libavfilter/Makefile
@@ -348,6 +348,8 @@ OBJS-$(CONFIG_TINTERLACE_FILTER) += vf_tinterlace.o
OBJS-$(CONFIG_TLUT2_FILTER) += vf_lut2.o framesync.o
OBJS-$(CONFIG_TMIX_FILTER) += vf_mix.o framesync.o
OBJS-$(CONFIG_TONEMAP_FILTER) += vf_tonemap.o
+OBJS-$(CONFIG_TONEMAP_OPENCL_FILTER) += vf_tonemap_opencl.o colorspace_basic.o opencl.o \
+ opencl/tonemap.o opencl/colorspace_basic.o
OBJS-$(CONFIG_TRANSPOSE_FILTER) += vf_transpose.o
OBJS-$(CONFIG_TRIM_FILTER) += trim.o
OBJS-$(CONFIG_UNPREMULTIPLY_FILTER) += vf_premultiply.o framesync.o
diff --git a/libavfilter/allfilters.c b/libavfilter/allfilters.c
index d958f9b..759097a 100644
--- a/libavfilter/allfilters.c
+++ b/libavfilter/allfilters.c
@@ -339,6 +339,7 @@ extern AVFilter ff_vf_tinterlace;
extern AVFilter ff_vf_tlut2;
extern AVFilter ff_vf_tmix;
extern AVFilter ff_vf_tonemap;
+extern AVFilter ff_vf_tonemap_opencl;
extern AVFilter ff_vf_transpose;
extern AVFilter ff_vf_trim;
extern AVFilter ff_vf_unpremultiply;
diff --git a/libavfilter/colorspace_basic.c b/libavfilter/colorspace_basic.c
new file mode 100644
index 0000000..93f9f08
--- /dev/null
+++ b/libavfilter/colorspace_basic.c
@@ -0,0 +1,89 @@
+/*
+ * 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_basic.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 ColorPrimaries *coeffs,
+ const struct WhitePoint *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;
+}
diff --git a/libavfilter/colorspace_basic.h b/libavfilter/colorspace_basic.h
new file mode 100644
index 0000000..5647ca6
--- /dev/null
+++ b/libavfilter/colorspace_basic.h
@@ -0,0 +1,40 @@
+/*
+ * 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
+ */
+
+#ifndef AVFILTER_COLORSPACE_BASIC_H
+#define AVFILTER_COLORSPACE_BASIC_H
+
+#include "libavutil/common.h"
+
+struct LumaCoefficients {
+ double cr, cg, cb;
+};
+
+struct ColorPrimaries {
+ double xr, yr, xg, yg, xb, yb;
+};
+
+struct WhitePoint {
+ double xw, yw;
+};
+
+void invert_matrix3x3(const double in[3][3], double out[3][3]);
+void mul3x3(double dst[3][3], const double src1[3][3], const double src2[3][3]);
+void fill_rgb2xyz_table(const struct ColorPrimaries *coeffs,
+ const struct WhitePoint *wp, double rgb2xyz[3][3]);
+#endif
diff --git a/libavfilter/opencl/colorspace_basic.cl b/libavfilter/opencl/colorspace_basic.cl
new file mode 100644
index 0000000..478a4f3
--- /dev/null
+++ b/libavfilter/opencl/colorspace_basic.cl
@@ -0,0 +1,137 @@
+/*
+ * 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
+ */
+
+constant const float ST2084_M1 = 0.1593017578125f;
+constant const float ST2084_M2 = 78.84375f;
+constant const float ST2084_C1 = 0.8359375f;
+constant const float ST2084_C2 = 18.8515625f;
+constant const float ST2084_C3 = 18.6875f;
+
+__constant float yuv2rgb_bt2020[] = {
+ 1.0f, 0.0f, 1.4746f,
+ 1.0f, -0.16455f, -0.57135f,
+ 1.0f, 1.8814f, 0.0f
+};
+
+__constant float yuv2rgb_bt709[] = {
+ 1.0f, 0.0f, 1.5748f,
+ 1.0f, -0.18732f, -0.46812f,
+ 1.0f, 1.8556f, 0.0f
+};
+
+__constant float rgb2yuv_bt709[] = {
+ 0.2126f, 0.7152f, 0.0722f,
+ -0.11457f, -0.38543f, 0.5f,
+ 0.5f, -0.45415f, -0.04585f
+};
+
+__constant float rgb2yuv_bt2020[] ={
+ 0.2627f, 0.678f, 0.0593f,
+ -0.1396f, -0.36037f, 0.5f,
+ 0.5f, -0.4598f, -0.0402f,
+};
+
+float eotf_st2084(float x) {
+ float p = pow(x, 1.0f / ST2084_M2);
+ float a = max(p -ST2084_C1, 0.0f);
+ float b = max(ST2084_C2 - ST2084_C3 * p, 1e-6f);
+ float c = pow(a / b, 1.0f / ST2084_M1);
+ return x > 0.0f ? c : 0.0f;
+}
+
+float inverse_eotf_bt1886(float c) {
+ return c < 0.0f ? 0.0f : pow(c, 1.0f / 2.4f);
+}
+
+float oetf_bt709(float c) {
+ c = c < 0.0f ? 0.0f : c;
+ float r1 = 4.5f * c;
+ float r2 = 1.099f * pow(c, 0.45f) - 0.099f;
+ return c < 0.018f ? r1 : r2;
+}
+float inverse_oetf_bt709(float c) {
+ float r1 = c / 4.5f;
+ float r2 = pow((c + 0.099f) / 1.099f, 1.0f / 0.45f);
+ return c < 0.081f ? r1 : r2;
+}
+
+float get_luma(float r, float g, float b) {
+ return r * YUV_COFF[0] + g * YUV_COFF[1] + b * YUV_COFF[2];
+}
+
+float3 yuv2rgb(float y, float u, float v) {
+#ifdef FULL_RANGE_IN
+ u -= 0.5f; v -= 0.5f;
+#else
+ y = (y * 255.0f - 16.0f) / 219.0f;
+ u = (u * 255.0f - 128.0f) / 224.0f;
+ v = (v * 255.0f - 128.0f) / 224.0f;
+#endif
+ float r = y*RGB_COFF[0] + u*RGB_COFF[1] + v*RGB_COFF[2];
+ float g = y*RGB_COFF[3] + u*RGB_COFF[4] + v*RGB_COFF[5];
+ float b = y*RGB_COFF[6] + u*RGB_COFF[7] + v*RGB_COFF[8];
+ return (float3)(r, g, b);
+}
+
+float3 yuv2lrgb(float y, float u, float v, float post_scale) {
+ float3 rgb = yuv2rgb(y, u, v);
+ float r = linearize(rgb.x);
+ float g = linearize(rgb.y);
+ float b = linearize(rgb.z);
+ r *= post_scale;
+ g *= post_scale;
+ b *= post_scale;
+ return (float3)(r, g, b);
+}
+
+float3 rgb2yuv(float r, float g, float b) {
+ float y = r*YUV_COFF[0] + g*YUV_COFF[1] + b*YUV_COFF[2];
+ float u = r*YUV_COFF[3] + g*YUV_COFF[4] + b*YUV_COFF[5];
+ float v = r*YUV_COFF[6] + g*YUV_COFF[7] + b*YUV_COFF[8];
+#ifdef FULL_RANGE_OUT
+ u += 0.5f; v += 0.5f;
+#else
+ y = (219.0f * y + 16.0f) / 255.0f;
+ u = (224.0f * u + 128.0f) / 255.0f;
+ v = (224.0f * v + 128.0f) / 255.0f;
+#endif
+ return (float3)(y, u, v);
+}
+
+float3 lrgb2yuv(float r, float g, float b, float pre_scale) {
+ r *= pre_scale;
+ g *= pre_scale;
+ b *= pre_scale;
+
+ r = delinearize(r);
+ g = delinearize(g);
+ b = delinearize(b);
+
+ return rgb2yuv(r, g, b);
+}
+
+float3 lrgb2lrgb(float r, float g, float b) {
+#ifdef RGB2RGB_PASSTHROUGH
+ return (float3)(r, g, b);
+#else
+ float rr = rgb2rgb[0] * r + rgb2rgb[1] * g + rgb2rgb[2] * b;
+ float gg = rgb2rgb[3] * r + rgb2rgb[4] * g + rgb2rgb[5] * b;
+ float bb = rgb2rgb[6] * r + rgb2rgb[7] * g + rgb2rgb[8] * b;
+ return (float3)(rr, gg, bb);
+#endif
+}
diff --git a/libavfilter/opencl/tonemap.cl b/libavfilter/opencl/tonemap.cl
new file mode 100644
index 0000000..e0aca27
--- /dev/null
+++ b/libavfilter/opencl/tonemap.cl
@@ -0,0 +1,136 @@
+/*
+ * 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
+ */
+
+
+#define ST2084_MAX_LUMINANCE 10000.0f
+#define REFERENCE_WHITE 100.0f
+
+extern float3 lrgb2yuv(float, float, float, float);
+extern float3 yuv2lrgb(float, float, float, float);
+extern float get_luma(float, float, float);
+
+float hable_f(float in) {
+ float a = 0.15f, b = 0.50f, c = 0.10f, d = 0.20f, e = 0.02f, f = 0.30f;
+ return (in * (in * a + b * c) + d * e) / (in * (in * a + b) + d * f) - e / f;
+}
+
+float direct(float s, float peak) {
+ return s;
+}
+
+float linear(float s, float peak) {
+ return s * tone_param / peak;
+}
+
+float gamma(float s, float peak) {
+ float p = s > 0.05f ? s /peak : 0.05f / peak;
+ float v = pow(p, 1.0f / tone_param);
+ return s > 0.05f ? v : (s * v /0.05f);
+}
+
+float clip(float s, float peak) {
+ return clamp(s * tone_param, 0.0f, 1.0f);
+}
+
+float reinhard(float s, float peak) {
+ return s / (s + tone_param) * (peak + tone_param) / peak;
+}
+
+float hable(float s, float peak) {
+ return hable_f(s)/hable_f(peak);
+}
+
+float mobius(float s, float peak) {
+ float j = tone_param;
+ float a, b;
+
+ if (s <= j)
+ return s;
+
+ a = -j * j * (peak - 1.0f) / (j * j - 2.0f * j + peak);
+ b = (j * j - 2.0f * j * peak + peak) / max(peak - 1.0f, 1e-6f);
+
+ return (b * b + 2.0f * b * j + j * j) / (b - a) * (s + a) / (s + b);
+}
+
+float3 map_one_pixel_rgb(float3 rgb, float peak) {
+ // de-saturate
+ float luma = get_luma(rgb.x, rgb.y, rgb.z);
+ float overbright = max(luma - 2.0f, 1e-6f) / max(luma, 1e-6f);
+ rgb = mix(rgb, (float3)luma, (float3)overbright);
+
+ float sig = max(max(rgb.x, max(rgb.y, rgb.z)), 1e-6f);
+ float sig_old = sig;
+ sig = TONE_FUNC(sig, peak);
+ rgb *= (sig/sig_old);
+ return rgb;
+}
+
+float3 map_one_pixel_yuv(float y, float u, float v, float peak, int m, int n) {
+ float3 c = yuv2lrgb(y, u, v, ST2084_MAX_LUMINANCE / peak);
+ c = map_one_pixel_rgb(c, peak / REFERENCE_WHITE);
+ return lrgb2yuv(c.x, c.y, c.z, 1.0f);
+}
+
+__kernel void tonemap(__write_only image2d_t dst1,
+ __write_only image2d_t dst2,
+ __read_only image2d_t src1,
+ __read_only image2d_t src2,
+#ifdef THIRD_PLANE
+ __write_only image2d_t dst3,
+ __read_only image2d_t src3,
+#endif
+ float peak
+ )
+{
+ const sampler_t sampler = (CLK_NORMALIZED_COORDS_FALSE |
+ CLK_FILTER_NEAREST);
+ int xi = get_global_id(0);
+ int yi = get_global_id(1);
+ // each work item process four pixels
+ int x = 2 * xi;
+ int y = 2 * yi;
+
+ float y0 = read_imagef(src1, sampler, (int2)(x, y)).x;
+ float y1 = read_imagef(src1, sampler, (int2)(x + 1, y)).x;
+ float y2 = read_imagef(src1, sampler, (int2)(x, y + 1)).x;
+ float y3 = read_imagef(src1, sampler, (int2)(x + 1, y + 1)).x;
+#ifdef THIRD_PLANE
+ float u = read_imagef(src2, sampler, (int2)(xi, yi)).x;
+ float v = read_imagef(src3, sampler, (int2)(xi, yi)).x;
+ float2 uv = (float2)(u, v);
+#else
+ float2 uv = read_imagef(src2, sampler, (int2)(xi, yi)).xy;
+#endif
+
+ float3 yuv0 = map_one_pixel_yuv(y0, uv.x, uv.y, peak, x, y);
+ float3 yuv1 = map_one_pixel_yuv(y1, uv.x, uv.y, peak, x+1, y);
+ float3 yuv2 = map_one_pixel_yuv(y2, uv.x, uv.y, peak, x, y+1);
+ float3 yuv3 = map_one_pixel_yuv(y3, uv.x, uv.y, peak, x+1,y+1);
+
+ write_imagef(dst1, (int2)(x, y), (float4)(yuv0.x, 0.0f, 0.0f, 1.0f));
+ write_imagef(dst1, (int2)(x+1, y), (float4)(yuv1.x, 0.0f, 0.0f, 1.0f));
+ write_imagef(dst1, (int2)(x, y+1), (float4)(yuv2.x, 0.0f, 0.0f, 1.0f));
+ write_imagef(dst1, (int2)(x+1, y+1), (float4)(yuv3.x, 0.0f, 0.0f, 1.0f));
+#ifdef THIRD_PLANE
+ write_imagef(dst2, (int2)(xi, yi), (float4)(yuv0.y, 0.0f, 0.0f, 1.0f));
+ write_imagef(dst3, (int2)(xi, yi), (float4)(yuv0.z, 0.0f, 0.0f, 1.0f));
+#else
+ write_imagef(dst2, (int2)(xi, yi), (float4)(yuv0.y, yuv0.z, 0.0f, 1.0f));
+#endif
+}
diff --git a/libavfilter/opencl_source.h b/libavfilter/opencl_source.h
index 4bb9969..c5b3f37 100644
--- a/libavfilter/opencl_source.h
+++ b/libavfilter/opencl_source.h
@@ -21,7 +21,9 @@
extern const char *ff_opencl_source_avgblur;
extern const char *ff_opencl_source_convolution;
+extern const char *ff_opencl_source_colorspace_basic;
extern const char *ff_opencl_source_overlay;
+extern const char *ff_opencl_source_tonemap;
extern const char *ff_opencl_source_unsharp;
#endif /* AVFILTER_OPENCL_SOURCE_H */
diff --git a/libavfilter/vf_tonemap_opencl.c b/libavfilter/vf_tonemap_opencl.c
new file mode 100644
index 0000000..72676e5
--- /dev/null
+++ b/libavfilter/vf_tonemap_opencl.c
@@ -0,0 +1,472 @@
+/*
+ * 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 <float.h>
+
+#include "libavutil/bprint.h"
+#include "libavutil/common.h"
+#include "libavutil/imgutils.h"
+#include "libavutil/mastering_display_metadata.h"
+#include "libavutil/mem.h"
+#include "libavutil/opt.h"
+#include "libavutil/pixdesc.h"
+
+#include "avfilter.h"
+#include "internal.h"
+#include "opencl.h"
+#include "opencl_source.h"
+#include "video.h"
+#include "colorspace_basic.h"
+
+enum TonemapAlgorithm {
+ TONEMAP_NONE,
+ TONEMAP_LINEAR,
+ TONEMAP_GAMMA,
+ TONEMAP_CLIP,
+ TONEMAP_REINHARD,
+ TONEMAP_HABLE,
+ TONEMAP_MOBIUS,
+ TONEMAP_MAX,
+};
+
+typedef struct TonemapOpenCLContext {
+ OpenCLFilterContext ocf;
+
+ enum AVColorSpace colorspace, colorspace_in, colorspace_out;
+ enum AVColorTransferCharacteristic trc, trc_in, trc_out;
+ enum AVColorPrimaries primaries, primaries_in, primaries_out;
+
+ enum TonemapAlgorithm tonemap;
+ double peak;
+ double param;
+ int initialised;
+ cl_kernel kernel;
+ cl_command_queue command_queue;
+} TonemapOpenCLContext;
+
+const char *yuv_coff[AVCOL_SPC_NB] = {
+ [AVCOL_SPC_BT709] = "rgb2yuv_bt709",
+ [AVCOL_SPC_BT2020_NCL] = "rgb2yuv_bt2020",
+};
+
+const char *rgb_coff[AVCOL_SPC_NB] = {
+ [AVCOL_SPC_BT709] = "yuv2rgb_bt709",
+ [AVCOL_SPC_BT2020_NCL] = "yuv2rgb_bt2020",
+};
+
+const char *linearize_funcs[AVCOL_TRC_NB] = {
+ [AVCOL_TRC_SMPTE2084] = "eotf_st2084",
+};
+
+const char *delinearize_funcs[AVCOL_TRC_NB] = {
+ [AVCOL_TRC_BT709] = "inverse_eotf_bt1886",
+ [AVCOL_TRC_BT2020_10] = "inverse_eotf_bt1886",
+
+};
+struct ColorPrimaries primaries_table[AVCOL_PRI_NB] = {
+ [AVCOL_PRI_BT709] = { 0.640, 0.330, 0.300, 0.600, 0.150, 0.060 },
+ [AVCOL_PRI_BT2020] = { 0.708, 0.292, 0.170, 0.797, 0.131, 0.046 },
+};
+
+struct WhitePoint whitepoint_table[AVCOL_PRI_NB] = {
+ [AVCOL_PRI_BT709] = { 0.3127, 0.3290 },
+ [AVCOL_PRI_BT2020] = { 0.3127, 0.3290 },
+};
+
+const char *tonemap_func[TONEMAP_MAX] = {
+ [TONEMAP_NONE] = "direct",
+ [TONEMAP_LINEAR] = "linear",
+ [TONEMAP_GAMMA] = "gamma",
+ [TONEMAP_CLIP] = "clip",
+ [TONEMAP_REINHARD] = "reinhard",
+ [TONEMAP_HABLE] = "hable",
+ [TONEMAP_MOBIUS] = "mobius",
+};
+
+static void get_rgb2rgb_matrix(enum AVColorPrimaries in, enum AVColorPrimaries out,
+ double rgb2rgb[3][3]) {
+ double rgb2xyz[3][3], xyz2rgb[3][3];
+
+ fill_rgb2xyz_table(&primaries_table[out], &whitepoint_table[out], rgb2xyz);
+ invert_matrix3x3(rgb2xyz, xyz2rgb);
+ fill_rgb2xyz_table(&primaries_table[in], &whitepoint_table[in], rgb2xyz);
+ mul3x3(rgb2rgb, rgb2xyz, xyz2rgb);
+}
+
+#define OPENCL_SOURCE_NB 3
+static int tonemap_opencl_init(AVFilterContext *avctx)
+{
+ TonemapOpenCLContext *ctx = avctx->priv;
+ int rgb2rgb_passthrough = 1;
+ double rgb2rgb[3][3];
+ cl_int cle;
+ int err;
+ AVBPrint header;
+ const char *opencl_sources[OPENCL_SOURCE_NB];
+
+ av_bprint_init(&header, 256, AV_BPRINT_SIZE_AUTOMATIC);
+
+ switch(ctx->tonemap) {
+ case TONEMAP_GAMMA:
+ if (isnan(ctx->param))
+ ctx->param = 1.8f;
+ break;
+ case TONEMAP_REINHARD:
+ if (!isnan(ctx->param))
+ ctx->param = (1.0f - ctx->param) / ctx->param;
+ break;
+ case TONEMAP_MOBIUS:
+ if (isnan(ctx->param))
+ ctx->param = 0.3f;
+ break;
+ }
+
+ if (isnan(ctx->param))
+ ctx->param = 1.0f;
+
+ av_bprintf(&header, "__constant const tone_param = %.4f;\n", ctx->param);
+ av_bprintf(&header, "#define TONE_FUNC %s\n", tonemap_func[ctx->tonemap]);
+
+ if (ctx->primaries_out != ctx->primaries_in) {
+ get_rgb2rgb_matrix(ctx->primaries_in, ctx->primaries_out, rgb2rgb);
+ rgb2rgb_passthrough = 0;
+ }
+
+ if (rgb2rgb_passthrough)
+ av_bprintf(&header, "#define RGB2RGB_PASSTHROUGH\n");
+ av_bprintf(&header, "#define RGB_COFF %s\n", rgb_coff[ctx->colorspace_in]);
+ av_bprintf(&header, "#define YUV_COFF %s\n", yuv_coff[ctx->colorspace_out]);
+ av_bprintf(&header, "#define linearize %s\n", linearize_funcs[ctx->trc_in]);
+ av_bprintf(&header, "#define delinearize %s\n", delinearize_funcs[ctx->trc_out]);
+
+ av_bprintf(&header, "__constant float rgb2rgb[9] = {\n");
+ av_bprintf(&header, " %.4ff, %.4ff, %.4ff,\n", rgb2rgb[0][0], rgb2rgb[0][1], rgb2rgb[0][2]);
+ av_bprintf(&header, " %.4ff, %.4ff, %.4ff,\n", rgb2rgb[1][0], rgb2rgb[1][1], rgb2rgb[1][2]);
+ av_bprintf(&header, " %.4ff, %.4ff, %.4ff};\n", rgb2rgb[2][0], rgb2rgb[2][1], rgb2rgb[2][2]);
+
+ opencl_sources[0] = header.str;
+ opencl_sources[1] = ff_opencl_source_tonemap;
+ opencl_sources[2] = ff_opencl_source_colorspace_basic;
+ err = ff_opencl_filter_load_program(avctx, opencl_sources, OPENCL_SOURCE_NB);
+
+ av_bprint_finalize(&header, NULL);
+ if (err < 0)
+ goto fail;
+
+ ctx->command_queue = clCreateCommandQueue(ctx->ocf.hwctx->context,
+ ctx->ocf.hwctx->device_id,
+ 0, &cle);
+ if (!ctx->command_queue) {
+ av_log(avctx, AV_LOG_ERROR, "Failed to create OpenCL "
+ "command queue: %d.\n", cle);
+ err = AVERROR(EIO);
+ goto fail;
+ }
+
+ ctx->kernel = clCreateKernel(ctx->ocf.program, "tonemap", &cle);
+ if (!ctx->kernel) {
+ av_log(avctx, AV_LOG_ERROR, "Failed to create kernel: %d.\n", cle);
+ err = AVERROR(EIO);
+ goto fail;
+ }
+
+ ctx->initialised = 1;
+ return 0;
+
+fail:
+ if (ctx->command_queue)
+ clReleaseCommandQueue(ctx->command_queue);
+ if (ctx->kernel)
+ clReleaseKernel(ctx->kernel);
+ return err;
+}
+
+static int tonemap_opencl_config_output(AVFilterLink *outlink)
+{
+ AVFilterContext *avctx = outlink->src;
+ TonemapOpenCLContext *s = avctx->priv;
+ //AVFilterLink *inlink = outlink->src->inputs[0];
+ int ret;
+
+ s->ocf.output_format = AV_PIX_FMT_NV12;
+ ret = ff_opencl_filter_config_output(outlink);
+ if (ret < 0)
+ return ret;
+
+ return 0;
+}
+
+static int launch_kernel(AVFilterContext *avctx, cl_kernel kernel,
+ AVFrame *output, AVFrame *input, float peak) {
+ TonemapOpenCLContext *ctx = avctx->priv;
+ int err = AVERROR(ENOSYS);
+ size_t global_work[2];
+ size_t local_work[2];
+ cl_int cle;
+
+ cle = clSetKernelArg(kernel, 0, sizeof(cl_mem), &output->data[0]);
+ if (cle != CL_SUCCESS) {
+ av_log(avctx, AV_LOG_ERROR, "Failed to set kernel "
+ "destination image 1st plane: %d.\n", cle);
+ return AVERROR(EINVAL);
+ }
+
+ cle = clSetKernelArg(kernel, 1, sizeof(cl_mem), &output->data[1]);
+ if (cle != CL_SUCCESS) {
+ av_log(avctx, AV_LOG_ERROR, "Failed to set kernel "
+ "destination image 2nd plane: %d.\n", cle);
+ return AVERROR(EINVAL);
+ }
+
+ cle = clSetKernelArg(kernel, 2, sizeof(cl_mem), &input->data[0]);
+ if (cle != CL_SUCCESS) {
+ av_log(avctx, AV_LOG_ERROR, "Failed to set kernel "
+ "source image 1st plane: %d.\n", cle);
+ return AVERROR(EINVAL);
+ }
+
+ cle = clSetKernelArg(kernel, 3, sizeof(cl_mem), &input->data[1]);
+ if (cle != CL_SUCCESS) {
+ av_log(avctx, AV_LOG_ERROR, "Failed to set kernel "
+ "source image 2nd plane: %d.\n", cle);
+ return AVERROR(EINVAL);
+ }
+
+ cle = clSetKernelArg(kernel, 4, sizeof(cl_float), &peak);
+ if (cle != CL_SUCCESS) {
+ av_log(avctx, AV_LOG_ERROR, "Failed to set kernel "
+ "peak luma: %d.\n", cle);
+ return AVERROR(EINVAL);
+ }
+
+ local_work[0] = 16;
+ local_work[1] = 16;
+ // Note the work size based on uv plane, as we process a 2x2 quad in one workitem
+ err = ff_opencl_filter_work_size_from_image(avctx, global_work, output,
+ 1, 16);
+ if (err < 0)
+ return err;
+
+ cle = clEnqueueNDRangeKernel(ctx->command_queue, kernel, 2, NULL,
+ global_work, local_work,
+ 0, NULL, NULL);
+ if (cle != CL_SUCCESS) {
+ av_log(avctx, AV_LOG_ERROR, "Failed to enqueue kernel: %d.\n",
+ cle);
+ return AVERROR(EIO);
+ }
+ return 0;
+}
+
+static double determine_signal_peak(AVFrame *in)
+{
+ AVFrameSideData *sd = av_frame_get_side_data(in, AV_FRAME_DATA_CONTENT_LIGHT_LEVEL);
+ double peak = 0;
+
+ if (sd) {
+ AVContentLightMetadata *clm = (AVContentLightMetadata *)sd->data;
+ peak = clm->MaxCLL;
+ }
+
+ sd = av_frame_get_side_data(in, AV_FRAME_DATA_MASTERING_DISPLAY_METADATA);
+ if (!peak && sd) {
+ AVMasteringDisplayMetadata *metadata = (AVMasteringDisplayMetadata *)sd->data;
+ if (metadata->has_luminance)
+ peak = av_q2d(metadata->max_luminance);
+ }
+
+ /* smpte2084 needs the side data above to work correctly
+ * if missing, assume that the original transfer was arib-std-b67 */
+ if (!peak)
+ peak = 1200;
+
+ return peak;
+}
+
+static int tonemap_opencl_filter_frame(AVFilterLink *inlink, AVFrame *input)
+{
+ AVFilterContext *avctx = inlink->dst;
+ AVFilterLink *outlink = avctx->outputs[0];
+ TonemapOpenCLContext *ctx = avctx->priv;
+ AVFrame *output = NULL;
+ cl_int cle;
+ int err;
+ double peak = ctx->peak;
+
+ AVHWFramesContext *input_frames_ctx =
+ (AVHWFramesContext*)input->hw_frames_ctx->data;
+
+ av_log(ctx, AV_LOG_DEBUG, "Filter input: %s, %ux%u (%"PRId64").\n",
+ av_get_pix_fmt_name(input->format),
+ input->width, input->height, input->pts);
+
+ if (!input->hw_frames_ctx)
+ return AVERROR(EINVAL);
+
+ output = ff_get_video_buffer(outlink, outlink->w, outlink->h);
+ if (!output) {
+ err = AVERROR(ENOMEM);
+ goto fail;
+ }
+
+ err = av_frame_copy_props(output, input);
+ if (err < 0)
+ goto fail;
+
+ if (!peak)
+ peak = determine_signal_peak(input);
+
+ if (ctx->trc != -1)
+ output->color_trc = ctx->trc;
+ if (ctx->primaries != -1)
+ output->color_primaries = ctx->primaries;
+ if (ctx->colorspace != -1)
+ output->colorspace = ctx->colorspace;
+
+ ctx->trc_in = input->color_trc;
+ ctx->trc_out = output->color_trc;
+ ctx->colorspace_in = input->colorspace;
+ ctx->colorspace_out = output->colorspace;
+ ctx->primaries_in = input->color_primaries;
+ ctx->primaries_out = output->color_primaries;
+
+ assert(output->sw_format == AV_PIX_FMT_NV12);
+
+ if (!ctx->initialised) {
+ err = tonemap_opencl_init(avctx);
+ if (err < 0)
+ goto fail;
+ }
+
+ switch(input_frames_ctx->sw_format) {
+ case AV_PIX_FMT_P010:
+ err = launch_kernel(avctx, ctx->kernel, output, input, peak);
+ if (err < 0) goto fail;
+ break;
+ default:
+ av_log(ctx, AV_LOG_ERROR, "unsupported format in tonemap_opencl.\n");
+ err = AVERROR(ENOSYS);
+ goto fail;
+ }
+
+ cle = clFinish(ctx->command_queue);
+ if (cle != CL_SUCCESS) {
+ av_log(avctx, AV_LOG_ERROR, "Failed to finish command queue: %d.\n",
+ cle);
+ err = AVERROR(EIO);
+ goto fail;
+ }
+
+
+ av_frame_free(&input);
+
+ av_log(ctx, AV_LOG_DEBUG, "Filter output: %s, %ux%u (%"PRId64").\n",
+ av_get_pix_fmt_name(output->format),
+ output->width, output->height, output->pts);
+
+ return ff_filter_frame(outlink, output);
+
+fail:
+ clFinish(ctx->command_queue);
+ av_frame_free(&input);
+ av_frame_free(&output);
+ return err;
+}
+
+static av_cold void tonemap_opencl_uninit(AVFilterContext *avctx)
+{
+ TonemapOpenCLContext *ctx = avctx->priv;
+ cl_int cle;
+
+ if (ctx->kernel) {
+ cle = clReleaseKernel(ctx->kernel);
+ if (cle != CL_SUCCESS)
+ av_log(avctx, AV_LOG_ERROR, "Failed to release "
+ "kernel: %d.\n", cle);
+ }
+
+ if (ctx->command_queue) {
+ cle = clReleaseCommandQueue(ctx->command_queue);
+ if (cle != CL_SUCCESS)
+ av_log(avctx, AV_LOG_ERROR, "Failed to release "
+ "command queue: %d.\n", cle);
+ }
+
+ ff_opencl_filter_uninit(avctx);
+}
+
+#define OFFSET(x) offsetof(TonemapOpenCLContext, x)
+#define FLAGS (AV_OPT_FLAG_FILTERING_PARAM | AV_OPT_FLAG_VIDEO_PARAM)
+static const AVOption tonemap_opencl_options[] = {
+ { "tonemap", "tonemap algorithm selection", OFFSET(tonemap), AV_OPT_TYPE_INT, {.i64 = TONEMAP_NONE}, TONEMAP_NONE, TONEMAP_MAX - 1, FLAGS, "tonemap" },
+ { "none", 0, 0, AV_OPT_TYPE_CONST, {.i64 = TONEMAP_NONE}, 0, 0, FLAGS, "tonemap" },
+ { "linear", 0, 0, AV_OPT_TYPE_CONST, {.i64 = TONEMAP_LINEAR}, 0, 0, FLAGS, "tonemap" },
+ { "gamma", 0, 0, AV_OPT_TYPE_CONST, {.i64 = TONEMAP_GAMMA}, 0, 0, FLAGS, "tonemap" },
+ { "clip", 0, 0, AV_OPT_TYPE_CONST, {.i64 = TONEMAP_CLIP}, 0, 0, FLAGS, "tonemap" },
+ { "reinhard", 0, 0, AV_OPT_TYPE_CONST, {.i64 = TONEMAP_REINHARD}, 0, 0, FLAGS, "tonemap" },
+ { "hable", 0, 0, AV_OPT_TYPE_CONST, {.i64 = TONEMAP_HABLE}, 0, 0, FLAGS, "tonemap" },
+ { "mobius", 0, 0, AV_OPT_TYPE_CONST, {.i64 = TONEMAP_MOBIUS}, 0, 0, FLAGS, "tonemap" },
+ { "transfer", "set transfer characteristic", OFFSET(trc), AV_OPT_TYPE_INT, {.i64 = -1}, -1, INT_MAX, FLAGS, "transfer" },
+ { "t", "set transfer characteristic", OFFSET(trc), AV_OPT_TYPE_INT, {.i64 = -1}, -1, INT_MAX, FLAGS, "transfer" },
+ { "bt709", 0, 0, AV_OPT_TYPE_CONST, {.i64 = AVCOL_TRC_BT709}, 0, 0, FLAGS, "transfer" },
+ { "bt2020", 0, 0, AV_OPT_TYPE_CONST, {.i64 = AVCOL_TRC_BT2020_10}, 0, 0, FLAGS, "transfer" },
+ { "matrix", "set colorspace matrix", OFFSET(colorspace), AV_OPT_TYPE_INT, {.i64 = -1}, -1, INT_MAX, FLAGS, "matrix" },
+ { "m", "set colorspace matrix", OFFSET(colorspace), AV_OPT_TYPE_INT, {.i64 = -1}, -1, INT_MAX, FLAGS, "matrix" },
+ { "bt709", 0, 0, AV_OPT_TYPE_CONST, {.i64 = AVCOL_SPC_BT709}, 0, 0, FLAGS, "matrix" },
+ { "bt2020", 0, 0, AV_OPT_TYPE_CONST, {.i64 = AVCOL_SPC_BT2020_NCL}, 0, 0, FLAGS, "matrix" },
+ { "primaries", "set color primaries", OFFSET(primaries), AV_OPT_TYPE_INT, {.i64 = -1}, -1, INT_MAX, FLAGS, "primaries" },
+ { "p", "set color primaries", OFFSET(primaries), AV_OPT_TYPE_INT, {.i64 = -1}, -1, INT_MAX, FLAGS, "primaries" },
+ { "bt709", 0, 0, AV_OPT_TYPE_CONST, {.i64 = AVCOL_PRI_BT709}, 0, 0, FLAGS, "primaries" },
+ { "bt2020", 0, 0, AV_OPT_TYPE_CONST, {.i64 = AVCOL_PRI_BT2020}, 0, 0, FLAGS, "primaries" },
+ { "peak", "signal peak override", OFFSET(peak), AV_OPT_TYPE_DOUBLE, {.dbl = 0}, 0, DBL_MAX, FLAGS },
+ { "param", "tonemap parameter", OFFSET(param), AV_OPT_TYPE_DOUBLE, {.dbl = NAN}, DBL_MIN, DBL_MAX, FLAGS },
+ { NULL }
+};
+
+AVFILTER_DEFINE_CLASS(tonemap_opencl);
+
+static const AVFilterPad tonemap_opencl_inputs[] = {
+ {
+ .name = "default",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .filter_frame = &tonemap_opencl_filter_frame,
+ .config_props = &ff_opencl_filter_config_input,
+ },
+ { NULL }
+};
+
+static const AVFilterPad tonemap_opencl_outputs[] = {
+ {
+ .name = "default",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .config_props = &tonemap_opencl_config_output,
+ },
+ { NULL }
+};
+
+AVFilter ff_vf_tonemap_opencl = {
+ .name = "tonemap_opencl",
+ .description = NULL_IF_CONFIG_SMALL("perform HDR to SDR conversion with tonemapping"),
+ .priv_size = sizeof(TonemapOpenCLContext),
+ .priv_class = &tonemap_opencl_class,
+ .init = &ff_opencl_filter_init,
+ .uninit = &tonemap_opencl_uninit,
+ .query_formats = &ff_opencl_filter_query_formats,
+ .inputs = tonemap_opencl_inputs,
+ .outputs = tonemap_opencl_outputs,
+ .flags_internal = FF_FILTER_FLAG_HWFRAME_AWARE,
+};
--
2.7.4
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