---
configure | 1 +
doc/filters.texi | 28 ++++
libavfilter/Makefile | 2 +
libavfilter/allfilters.c | 1 +
libavfilter/opencl/gblur.cl | 62 +++++++
libavfilter/opencl_source.h | 1 +
libavfilter/vf_gblur_opencl.c | 368 ++++++++++++++++++++++++++++++++++++++++++
7 files changed, 463 insertions(+)
create mode 100644 libavfilter/opencl/gblur.cl
create mode 100644 libavfilter/vf_gblur_opencl.c
diff --git a/configure b/configure
index bbeaf2fadc..8c1d3cdf92 100755
--- a/configure
+++ b/configure
@@ -3451,6 +3451,7 @@ freezedetect_filter_select="scene_sad"
frei0r_filter_deps="frei0r libdl"
frei0r_src_filter_deps="frei0r libdl"
fspp_filter_deps="gpl"
+gblur_opencl_filter_deps="opencl"
geq_filter_deps="gpl"
histeq_filter_deps="gpl"
hqdn3d_filter_deps="gpl"
diff --git a/doc/filters.texi b/doc/filters.texi
index 4bf96b6d90..80485fed83 100644
--- a/doc/filters.texi
+++ b/doc/filters.texi
@@ -19010,6 +19010,34 @@ Apply erosion filter with threshold0 set to 30,
threshold1 set 40, threshold2 se
@end example
@end itemize
+@section gblur_opencl
+
+Apply Gaussian blur filter.
+
+The filter accepts the following options:
+
+@table @option
+@item sigma
+Set horizontal sigma, standard deviation of Gaussian blur. Default is
@code{0.5}.
+
+@item planes
+Set which planes to filter. By default all planes are filtered.
+
+@item sigmaV
+Set vertical sigma, if negative it will be same as @code{sigma}.
+Default is @code{-1}.
+@end table
+
+@subsection Example
+
+@itemize
+@item
+Apply Gaussian blur filter with horizontal and vertical sigma of 0.5.
+@example
+-i INPUT -vf "hwupload, gblur_opencl=0.5, hwdownload" OUTPUT
+@end example
+@end itemize
+
@section overlay_opencl
Overlay one video on top of another.
diff --git a/libavfilter/Makefile b/libavfilter/Makefile
index fef6ec5c55..230315ef39 100644
--- a/libavfilter/Makefile
+++ b/libavfilter/Makefile
@@ -243,6 +243,8 @@ OBJS-$(CONFIG_FREEZEDETECT_FILTER) +=
vf_freezedetect.o
OBJS-$(CONFIG_FREI0R_FILTER) += vf_frei0r.o
OBJS-$(CONFIG_FSPP_FILTER) += vf_fspp.o
OBJS-$(CONFIG_GBLUR_FILTER) += vf_gblur.o
+OBJS-$(CONFIG_GBLUR_OPENCL_FILTER) += vf_gblur_opencl.o opencl.o \
+ opencl/gblur.o
OBJS-$(CONFIG_GEQ_FILTER) += vf_geq.o
OBJS-$(CONFIG_GRADFUN_FILTER) += vf_gradfun.o
OBJS-$(CONFIG_GRAPHMONITOR_FILTER) += f_graphmonitor.o
diff --git a/libavfilter/allfilters.c b/libavfilter/allfilters.c
index c51ae0f3c7..cb0fc051cc 100644
--- a/libavfilter/allfilters.c
+++ b/libavfilter/allfilters.c
@@ -229,6 +229,7 @@ extern AVFilter ff_vf_freezedetect;
extern AVFilter ff_vf_frei0r;
extern AVFilter ff_vf_fspp;
extern AVFilter ff_vf_gblur;
+extern AVFilter ff_vf_gblur_opencl;
extern AVFilter ff_vf_geq;
extern AVFilter ff_vf_gradfun;
extern AVFilter ff_vf_graphmonitor;
diff --git a/libavfilter/opencl/gblur.cl b/libavfilter/opencl/gblur.cl
new file mode 100644
index 0000000000..4fece30d4a
--- /dev/null
+++ b/libavfilter/opencl/gblur.cl
@@ -0,0 +1,62 @@
+/*
+ * Copyright (c) 2018 Dylan Fernando
+ *
+ * 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
+ */
+
+
+__kernel void gblur_conv_horz(__write_only image2d_t dst,
+ __read_only image2d_t src,
+ int coef_matrix_dim,
+ __constant float *coef_matrix)
+{
+ const sampler_t sampler = (CLK_NORMALIZED_COORDS_FALSE |
+ CLK_ADDRESS_CLAMP_TO_EDGE |
+ CLK_FILTER_NEAREST);
+
+ const int half_matrix_dim = (coef_matrix_dim / 2);
+ int2 loc = (int2)(get_global_id(0), get_global_id(1));
+ float4 convPix = (float4)(0.0f, 0.0f, 0.0f, 0.0f);
+
+ for (int conv_j = -half_matrix_dim; conv_j <= half_matrix_dim; conv_j++) {
+ float4 px = read_imagef(src, sampler, loc + (int2)(conv_j, 0));
+ convPix += px * coef_matrix[(conv_j + half_matrix_dim)];
+ }
+
+ write_imagef(dst, loc, convPix);
+}
+
+__kernel void gblur_conv_vert(__write_only image2d_t dst,
+ __read_only image2d_t src,
+ int coef_matrix_dim,
+ __constant float *coef_matrix)
+{
+ const sampler_t sampler = (CLK_NORMALIZED_COORDS_FALSE |
+ CLK_ADDRESS_CLAMP_TO_EDGE |
+ CLK_FILTER_NEAREST);
+
+ const int half_matrix_dim = (coef_matrix_dim / 2);
+ int2 loc = (int2)(get_global_id(0), get_global_id(1));
+ float4 convPix = (float4)(0.0f, 0.0f, 0.0f, 0.0f);
+
+ for (int conv_j = -half_matrix_dim; conv_j <= half_matrix_dim; conv_j++) {
+ float4 px = read_imagef(src, sampler, loc + (int2)(0, conv_j));
+ convPix += px * coef_matrix[(conv_j + half_matrix_dim)];
+ }
+
+ write_imagef(dst, loc, convPix);
+}
diff --git a/libavfilter/opencl_source.h b/libavfilter/opencl_source.h
index 4118138c30..be7e826c4c 100644
--- a/libavfilter/opencl_source.h
+++ b/libavfilter/opencl_source.h
@@ -20,6 +20,7 @@
#define AVFILTER_OPENCL_SOURCE_H
extern const char *ff_opencl_source_avgblur;
+extern const char *ff_opencl_source_gblur;
extern const char *ff_opencl_source_colorspace_common;
extern const char *ff_opencl_source_convolution;
extern const char *ff_opencl_source_neighbor;
diff --git a/libavfilter/vf_gblur_opencl.c b/libavfilter/vf_gblur_opencl.c
new file mode 100644
index 0000000000..37c2b24918
--- /dev/null
+++ b/libavfilter/vf_gblur_opencl.c
@@ -0,0 +1,368 @@
+/*
+ * 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 "libavutil/common.h"
+#include "libavutil/imgutils.h"
+#include "libavutil/opt.h"
+
+#include "avfilter.h"
+#include "internal.h"
+#include "opencl.h"
+#include "opencl_source.h"
+#include "video.h"
+
+typedef struct GBlurOpenCLContext {
+ OpenCLFilterContext ocf;
+
+ int initialised;
+ cl_kernel kernel_horz;
+ cl_kernel kernel_vert;
+
+ cl_command_queue command_queue;
+
+ int planes;
+ float sigma;
+ float sigmaV;
+
+ cl_mem matrix_horiz;
+ cl_mem matrix_vert;
+ int kernel_dimension_horiz;
+ int kernel_dimension_vert;
+
+} GBlurOpenCLContext;
+
+
+static int gblur_opencl_init(AVFilterContext *avctx)
+{
+ GBlurOpenCLContext *ctx = avctx->priv;
+ cl_int cle;
+ int err;
+ err = ff_opencl_filter_load_program(avctx, &ff_opencl_source_gblur, 1);
+ if (err < 0)
+ goto fail;
+
+ ctx->command_queue = clCreateCommandQueue(ctx->ocf.hwctx->context,
+ ctx->ocf.hwctx->device_id,
+ 0, &cle);
+ CL_FAIL_ON_ERROR(AVERROR(EIO), "Failed to create OpenCL "
+ "command queue %d.\n", cle);
+
+ ctx->kernel_horz = clCreateKernel(ctx->ocf.program, "gblur_conv_horz",
&cle);
+ CL_FAIL_ON_ERROR(AVERROR(EIO), "Failed to create "
+ "kernel %d.\n", cle);
+ ctx->kernel_vert = clCreateKernel(ctx->ocf.program, "gblur_conv_vert",
&cle);
+ CL_FAIL_ON_ERROR(AVERROR(EIO), "Failed to create "
+ "kernel %d.\n", cle);
+
+ ctx->initialised = 1;
+ return 0;
+
+fail:
+ if (ctx->command_queue)
+ clReleaseCommandQueue(ctx->command_queue);
+ if (ctx->kernel_horz)
+ clReleaseKernel(ctx->kernel_horz);
+ if (ctx->kernel_vert)
+ clReleaseKernel(ctx->kernel_vert);
+ return err;
+}
+
+
+static int gblur_opencl_make_filter_params(AVFilterLink *inlink)
+{
+ AVFilterContext *ctx = inlink->dst;
+ GBlurOpenCLContext *s = ctx->priv;
+
+ float *matrix_horiz = NULL;
+ float *matrix_vert = NULL;
+ size_t matrix_bytes_horiz;
+ size_t matrix_bytes_vert;
+ cl_int cle;
+ double acc;
+ int kernel_dimension_vert, kernel_dimension_horiz;
+
+ if (s->sigmaV < 0) {
+ s->sigmaV = s->sigma;
+ }
+
+
+ kernel_dimension_horiz = (int)ceilf(6 * s->sigma);
+ if (kernel_dimension_horiz % 2 == 0)
+ kernel_dimension_horiz++;
+ matrix_bytes_horiz = sizeof(float)*kernel_dimension_horiz;
+
+ matrix_horiz = av_malloc(matrix_bytes_horiz);
+ if (!matrix_horiz) {
+ return AVERROR(ENOMEM);
+ }
+
+ acc = 0;
+
+ for (int i = 0; i < kernel_dimension_horiz; i++) {
+ int x = i - (kernel_dimension_horiz / 2);
+
+ matrix_horiz[i] = (1 / sqrt(2 * 3.14159*pow(s->sigma,
2)))*exp(-(pow(x, 2) / (2 * pow(s->sigma, 2))));
+ acc += matrix_horiz[i];
+ }
+
+ kernel_dimension_vert = (int)ceilf(6 * s->sigmaV);
+ if (kernel_dimension_vert % 2 == 0)
+ kernel_dimension_vert++;
+
+ matrix_bytes_vert = sizeof(float)*kernel_dimension_vert;
+ matrix_vert = av_malloc(matrix_bytes_vert);
+ if (!matrix_vert) {
+ return AVERROR(ENOMEM);
+ }
+
+ acc = 0;
+ for (int i = 0; i < kernel_dimension_vert; i++) {
+ int x = i - (kernel_dimension_vert / 2);
+
+ matrix_vert[i] = (1 / sqrt(2 * 3.14159*pow(s->sigmaV,
2)))*exp(-(pow(x, 2) / (2 * pow(s->sigmaV, 2))));
+ acc += matrix_vert[i];
+ }
+
+ s->kernel_dimension_horiz = kernel_dimension_horiz;
+ s->matrix_horiz = clCreateBuffer(s->ocf.hwctx->context,
+ CL_MEM_READ_ONLY |
+ CL_MEM_COPY_HOST_PTR |
+ CL_MEM_HOST_NO_ACCESS,
+ matrix_bytes_horiz, matrix_horiz, &cle);
+
+ s->kernel_dimension_vert = kernel_dimension_vert;
+ s->matrix_vert = clCreateBuffer(s->ocf.hwctx->context,
+ CL_MEM_READ_ONLY |
+ CL_MEM_COPY_HOST_PTR |
+ CL_MEM_HOST_NO_ACCESS,
+ matrix_bytes_vert, matrix_vert, &cle);
+
+ av_freep(&matrix_horiz);
+ av_freep(&matrix_vert);
+
+ return 0;
+}
+
+static int gblur_opencl_filter_frame(AVFilterLink *inlink, AVFrame *input)
+{
+ AVFilterContext *avctx = inlink->dst;
+ AVFilterLink *outlink = avctx->outputs[0];
+ GBlurOpenCLContext *ctx = avctx->priv;
+
+ AVFrame *output = NULL;
+ AVFrame *intermediate = NULL;
+ cl_int cle;
+ size_t global_work[2];
+ cl_mem src, dst, inter;
+ size_t origin[3] = {0, 0, 0};
+ size_t region[3] = {0, 0, 1};
+ int err, p;
+
+ 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);
+
+ if (!ctx->initialised) {
+ err = gblur_opencl_init(avctx);
+ if (err < 0)
+ goto fail;
+
+ err = gblur_opencl_make_filter_params(inlink);
+ if (err < 0)
+ goto fail;
+ }
+
+ output = ff_get_video_buffer(outlink, outlink->w, outlink->h);
+ if (!output) {
+ err = AVERROR(ENOMEM);
+ goto fail;
+ }
+ intermediate = ff_get_video_buffer(outlink, outlink->w, outlink->h);
+ if (!intermediate) {
+ err = AVERROR(ENOMEM);
+ goto fail;
+ }
+
+ for (p = 0; p < FF_ARRAY_ELEMS(output->data); p++) {
+ src = (cl_mem) input->data[p];
+ dst = (cl_mem) output->data[p];
+ inter = (cl_mem)intermediate->data[p];
+
+ if (!dst)
+ break;
+
+ if (!(ctx->planes & (1 << p))) {
+ err = ff_opencl_filter_work_size_from_image(avctx, region, output,
p, 0);
+ if (err < 0)
+ goto fail;
+
+ cle = clEnqueueCopyImage(ctx->command_queue, src, dst,
+ origin, origin, region, 0, NULL, NULL);
+ CL_FAIL_ON_ERROR(AVERROR(EIO), "Failed to copy plane %d: %d.\n",
+ p, cle);
+ }
+ else {
+ CL_SET_KERNEL_ARG(ctx->kernel_horz, 0, cl_mem, &inter);
+ CL_SET_KERNEL_ARG(ctx->kernel_horz, 1, cl_mem, &src);
+ CL_SET_KERNEL_ARG(ctx->kernel_horz, 2, cl_int,
&ctx->kernel_dimension_horiz);
+ CL_SET_KERNEL_ARG(ctx->kernel_horz, 3, cl_mem,
&ctx->matrix_horiz);
+
+ err = ff_opencl_filter_work_size_from_image(avctx, global_work,
intermediate, p, 0);
+ if (err < 0)
+ goto fail;
+
+ av_log(avctx, AV_LOG_DEBUG, "Run kernel on plane %d "
+ "(%"SIZE_SPECIFIER"x%"SIZE_SPECIFIER").\n",
+ p, global_work[0], global_work[1]);
+
+ cle = clEnqueueNDRangeKernel(ctx->command_queue, ctx->kernel_horz,
2, NULL,
+ global_work, NULL,
+ 0, NULL, NULL);
+ CL_FAIL_ON_ERROR(AVERROR(EIO), "Failed to enqueue horizontal "
+ "kernel: %d.\n", cle);
+
+
+ CL_SET_KERNEL_ARG(ctx->kernel_vert, 0, cl_mem, &dst);
+ CL_SET_KERNEL_ARG(ctx->kernel_vert, 1, cl_mem, &inter);
+ CL_SET_KERNEL_ARG(ctx->kernel_vert, 2, cl_int,
&ctx->kernel_dimension_vert);
+ CL_SET_KERNEL_ARG(ctx->kernel_vert, 3, cl_mem,
&ctx->matrix_vert);
+
+ err = ff_opencl_filter_work_size_from_image(avctx, global_work,
output, p, 0);
+ if (err < 0)
+ goto fail;
+
+ av_log(avctx, AV_LOG_DEBUG, "Run kernel on plane %d "
+ "(%"SIZE_SPECIFIER"x%"SIZE_SPECIFIER").\n",
+ p, global_work[0], global_work[1]);
+
+ cle = clEnqueueNDRangeKernel(ctx->command_queue, ctx->kernel_vert,
2, NULL,
+ global_work, NULL,
+ 0, NULL, NULL);
+ CL_FAIL_ON_ERROR(AVERROR(EIO), "Failed to enqueue vertical "
+ "kernel: %d.\n", cle);
+ }
+ }
+
+ cle = clFinish(ctx->command_queue);
+ CL_FAIL_ON_ERROR(AVERROR(EIO), "Failed to finish command queue: %d.\n",
cle);
+
+ err = av_frame_copy_props(output, input);
+ if (err < 0)
+ goto fail;
+
+ av_frame_free(&input);
+ av_frame_free(&intermediate);
+
+ 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);
+ av_frame_free(&intermediate);
+ return err;
+}
+
+
+static av_cold void gblur_opencl_uninit(AVFilterContext *avctx)
+{
+ GBlurOpenCLContext *ctx = avctx->priv;
+ cl_int cle;
+
+ if (ctx->kernel_horz) {
+ cle = clReleaseKernel(ctx->kernel_horz);
+ if (cle != CL_SUCCESS)
+ av_log(avctx, AV_LOG_ERROR, "Failed to release "
+ "kernel: %d.\n", cle);
+ }
+
+ if (ctx->kernel_vert) {
+ cle = clReleaseKernel(ctx->kernel_vert);
+ 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);
+}
+
+
+static const AVFilterPad gblur_opencl_inputs[] = {
+ {
+ .name = "default",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .filter_frame = &gblur_opencl_filter_frame,
+ .config_props = &ff_opencl_filter_config_input,
+ },
+ { NULL }
+};
+
+
+static const AVFilterPad gblur_opencl_outputs[] = {
+ {
+ .name = "default",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .config_props = &ff_opencl_filter_config_output,
+ },
+ { NULL }
+};
+
+
+#define OFFSET(x) offsetof(GBlurOpenCLContext, x)
+#define FLAGS (AV_OPT_FLAG_FILTERING_PARAM | AV_OPT_FLAG_VIDEO_PARAM)
+
+#if CONFIG_GBLUR_OPENCL_FILTER
+
+static const AVOption gblur_opencl_options[] = {
+ { "sigma", "set horizontal sigma", OFFSET(sigma), AV_OPT_TYPE_FLOAT,
{.dbl=0.5}, 0.0, 1024, FLAGS },
+ { "planes", "set planes to filter", OFFSET(planes), AV_OPT_TYPE_INT,
{.i64=0xF}, 0, 0xF, FLAGS },
+ { "sigmaV", "set vertical sigma", OFFSET(sigmaV), AV_OPT_TYPE_FLOAT,
{.dbl=-1}, -1, 1024, FLAGS },
+ { NULL }
+};
+
+AVFILTER_DEFINE_CLASS(gblur_opencl);
+
+
+AVFilter ff_vf_gblur_opencl = {
+ .name = "gblur_opencl",
+ .description = NULL_IF_CONFIG_SMALL("Apply gaussian blur filter"),
+ .priv_size = sizeof(GBlurOpenCLContext),
+ .priv_class = &gblur_opencl_class,
+ .init = &ff_opencl_filter_init,
+ .uninit = &gblur_opencl_uninit,
+ .query_formats = &ff_opencl_filter_query_formats,
+ .inputs = gblur_opencl_inputs,
+ .outputs = gblur_opencl_outputs,
+ .flags_internal = FF_FILTER_FLAG_HWFRAME_AWARE,
+};
+
+#endif /* CONFIG_GBLUR_OPENCL_FILTER */
--
2.15.2 (Apple Git-101.1)
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