[FFmpeg-devel] [PATCH] lavfi: add nlmeans_opencl filter
Ruiling Song
ruiling.song at intel.com
Mon Apr 1 10:52:34 EEST 2019
Signed-off-by: Ruiling Song <ruiling.song at intel.com>
---
This filter runs about 2x faster on integrated GPU than nlmeans on my Skylake CPU.
Anybody like to give some comments?
Ruiling
configure | 1 +
doc/filters.texi | 4 +
libavfilter/Makefile | 1 +
libavfilter/allfilters.c | 1 +
libavfilter/opencl/nlmeans.cl | 108 +++++++++
libavfilter/opencl_source.h | 1 +
libavfilter/vf_nlmeans_opencl.c | 390 ++++++++++++++++++++++++++++++++
7 files changed, 506 insertions(+)
create mode 100644 libavfilter/opencl/nlmeans.cl
create mode 100644 libavfilter/vf_nlmeans_opencl.c
diff --git a/configure b/configure
index f6123f53e5..a233512491 100755
--- a/configure
+++ b/configure
@@ -3460,6 +3460,7 @@ mpdecimate_filter_select="pixelutils"
minterpolate_filter_select="scene_sad"
mptestsrc_filter_deps="gpl"
negate_filter_deps="lut_filter"
+nlmeans_opencl_filter_deps="opencl"
nnedi_filter_deps="gpl"
ocr_filter_deps="libtesseract"
ocv_filter_deps="libopencv"
diff --git a/doc/filters.texi b/doc/filters.texi
index 867607d870..21c2c1a4b5 100644
--- a/doc/filters.texi
+++ b/doc/filters.texi
@@ -19030,6 +19030,10 @@ Apply erosion filter with threshold0 set to 30, threshold1 set 40, threshold2 se
@end example
@end itemize
+ at section nlmeans_opencl
+
+Non-local Means denoise filter through OpenCL, this filter accepts same options as @ref{nlmeans}.
+
@section overlay_opencl
Overlay one video on top of another.
diff --git a/libavfilter/Makefile b/libavfilter/Makefile
index fef6ec5c55..92039bfdcf 100644
--- a/libavfilter/Makefile
+++ b/libavfilter/Makefile
@@ -291,6 +291,7 @@ OBJS-$(CONFIG_MIX_FILTER) += vf_mix.o
OBJS-$(CONFIG_MPDECIMATE_FILTER) += vf_mpdecimate.o
OBJS-$(CONFIG_NEGATE_FILTER) += vf_lut.o
OBJS-$(CONFIG_NLMEANS_FILTER) += vf_nlmeans.o
+OBJS-$(CONFIG_NLMEANS_OPENCL_FILTER) += vf_nlmeans_opencl.o opencl.o opencl/nlmeans.o
OBJS-$(CONFIG_NNEDI_FILTER) += vf_nnedi.o
OBJS-$(CONFIG_NOFORMAT_FILTER) += vf_format.o
OBJS-$(CONFIG_NOISE_FILTER) += vf_noise.o
diff --git a/libavfilter/allfilters.c b/libavfilter/allfilters.c
index c51ae0f3c7..2a6390c92d 100644
--- a/libavfilter/allfilters.c
+++ b/libavfilter/allfilters.c
@@ -277,6 +277,7 @@ extern AVFilter ff_vf_mix;
extern AVFilter ff_vf_mpdecimate;
extern AVFilter ff_vf_negate;
extern AVFilter ff_vf_nlmeans;
+extern AVFilter ff_vf_nlmeans_opencl;
extern AVFilter ff_vf_nnedi;
extern AVFilter ff_vf_noformat;
extern AVFilter ff_vf_noise;
diff --git a/libavfilter/opencl/nlmeans.cl b/libavfilter/opencl/nlmeans.cl
new file mode 100644
index 0000000000..dcb04834ca
--- /dev/null
+++ b/libavfilter/opencl/nlmeans.cl
@@ -0,0 +1,108 @@
+/*
+ * 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
+ */
+
+const sampler_t sampler = (CLK_NORMALIZED_COORDS_FALSE |
+ CLK_ADDRESS_CLAMP_TO_EDGE |
+ CLK_FILTER_NEAREST);
+
+kernel void horiz_sum(__global uint4 *ii,
+ __read_only image2d_t src,
+ int width,
+ int height,
+ int4 dx,
+ int4 dy)
+{
+
+ int y = get_global_id(0);
+ int work_size = get_global_size(0);
+
+ uint4 sum = (uint4)(0);
+ float4 s2;
+ for (int i = 0; i < width; i++) {
+ float s1 = read_imagef(src, sampler, (int2)(i, y)).x;
+ s2.x = read_imagef(src, sampler, (int2)(i+dx.x, y+dy.x)).x;
+ s2.y = read_imagef(src, sampler, (int2)(i+dx.y, y+dy.y)).x;
+ s2.z = read_imagef(src, sampler, (int2)(i+dx.z, y+dy.z)).x;
+ s2.w = read_imagef(src, sampler, (int2)(i+dx.w, y+dy.w)).x;
+ sum += convert_uint4((s1-s2)*(s1-s2) * 255*255);
+ ii[y * width + i] = sum;
+ }
+}
+
+kernel void vert_sum(__global uint4 *ii,
+ int width,
+ int height)
+{
+ int x = get_global_id(0);
+ uint4 sum = 0;
+ for (int i = 0; i < height; i++) {
+ ii[i * width + x] += sum;
+ sum = ii[i * width + x];
+ }
+}
+
+kernel void weight_accum(global float *sum, global float *weight,
+ global uint4 *ii, __read_only image2d_t src,
+ int width, int height, int p, float h,
+ int4 dx, int4 dy)
+{
+ // w(x) = ii(x-p, y-p) + ii(x+p, y+p) - ii(x+p, y-p) - ii(x-p, y+p)
+ // total_sum[x] += w(x, y) * src(x+dx, y+dy)
+ // total_weight += w(x, y)
+ int x = get_global_id(0);
+ int y = get_global_id(1);
+ int4 xoff = x+dx;
+ int4 yoff = y+dy;
+ uint4 a = 0, b = 0, c = 0, d = 0;
+ uint4 src_pix = 0;
+
+ // out-of-bounding-box?
+ int oobb = (x-p) < 0 || (y-p) < 0 || (y+p) >= height || (x+p) >= width;
+
+ src_pix.x = (int)(255 * read_imagef(src, sampler, (int2)(xoff.x, yoff.x)).x);
+ src_pix.y = (int)(255 * read_imagef(src, sampler, (int2)(xoff.y, yoff.y)).x);
+ src_pix.z = (int)(255 * read_imagef(src, sampler, (int2)(xoff.z, yoff.z)).x);
+ src_pix.w = (int)(255 * read_imagef(src, sampler, (int2)(xoff.w, yoff.w)).x);
+ if (!oobb) {
+ a = ii[(y-p) * width + x - p];
+ b = ii[(y + p) * width + x - p];
+ c = ii[(y-p) * width + x + p];
+ d = ii[(y + p) * width + x + p];
+ }
+
+ float4 patch_diff = convert_float4(d + a - c - b);
+ float4 w = native_exp(-patch_diff/(h*h));
+ float w_sum = w.x + w.y + w.z + w.w;
+ weight[y*width + x] += w_sum;
+ sum[y*width + x] += dot(w, convert_float4(src_pix));
+}
+
+kernel void average(__write_only image2d_t dst,
+ __read_only image2d_t src,
+ global float *sum, global float *weight) {
+ int x = get_global_id(0);
+ int y = get_global_id(1);
+ int2 dim = get_image_dim(dst);
+
+ float w = weight[y * dim.x + x];
+ float s = sum[y*dim.x + x];
+ float src_pix = read_imagef(src, sampler, (int2)(x, y)).x;
+ float r = (s + src_pix * 255) / (1.0f + w) / 255.0f;
+ if (x < dim.x && y < dim.y)
+ write_imagef(dst, (int2)(x, y), (float4)(r, 0.0f, 0.0f, 1.0f));
+}
diff --git a/libavfilter/opencl_source.h b/libavfilter/opencl_source.h
index 4118138c30..fd40fd7dca 100644
--- a/libavfilter/opencl_source.h
+++ b/libavfilter/opencl_source.h
@@ -23,6 +23,7 @@ extern const char *ff_opencl_source_avgblur;
extern const char *ff_opencl_source_colorspace_common;
extern const char *ff_opencl_source_convolution;
extern const char *ff_opencl_source_neighbor;
+extern const char *ff_opencl_source_nlmeans;
extern const char *ff_opencl_source_overlay;
extern const char *ff_opencl_source_tonemap;
extern const char *ff_opencl_source_transpose;
diff --git a/libavfilter/vf_nlmeans_opencl.c b/libavfilter/vf_nlmeans_opencl.c
new file mode 100644
index 0000000000..0cc9af10da
--- /dev/null
+++ b/libavfilter/vf_nlmeans_opencl.c
@@ -0,0 +1,390 @@
+/*
+ * 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/avassert.h"
+#include "libavutil/common.h"
+#include "libavutil/imgutils.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"
+
+static const enum AVPixelFormat supported_formats[] = {
+ AV_PIX_FMT_YUV420P,
+ AV_PIX_FMT_YUV444P,
+ AV_PIX_FMT_GBRP,
+};
+
+static int is_format_supported(enum AVPixelFormat fmt)
+{
+ int i;
+
+ for (i = 0; i < FF_ARRAY_ELEMS(supported_formats); i++)
+ if (supported_formats[i] == fmt)
+ return 1;
+ return 0;
+}
+
+typedef struct NLMeansOpenCLContext {
+ OpenCLFilterContext ocf;
+ int initialised;
+ cl_kernel vert_kernel;
+ cl_kernel horiz_kernel;
+ cl_kernel accum_kernel;
+ cl_kernel average_kernel;
+ double sigma;
+ float h;
+ int chroma_w;
+ int chroma_h;
+ int patch_size;
+ int patch_size_uv;
+ int research_size;
+ int research_size_uv;
+ cl_command_queue command_queue;
+} NLMeansOpenCLContext;
+
+static int nlmeans_opencl_init(AVFilterContext *avctx)
+{
+ NLMeansOpenCLContext *ctx = avctx->priv;
+ cl_int cle;
+ int err;
+
+ ctx->h = ctx->sigma * 10;
+ if (!ctx->research_size_uv)
+ ctx->research_size_uv = ctx->research_size;
+ if (!ctx->patch_size_uv)
+ ctx->patch_size_uv = ctx->patch_size;
+
+ err = ff_opencl_filter_load_program(avctx, &ff_opencl_source_nlmeans, 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->vert_kernel = clCreateKernel(ctx->ocf.program, "vert_sum", &cle);
+ CL_FAIL_ON_ERROR(AVERROR(EIO), "Failed to create vert_sum kernel %d.\n", cle);
+
+ ctx->horiz_kernel = clCreateKernel(ctx->ocf.program, "horiz_sum", &cle);
+ CL_FAIL_ON_ERROR(AVERROR(EIO), "Failed to create horiz_sum kernel %d.\n", cle);
+
+ ctx->accum_kernel = clCreateKernel(ctx->ocf.program, "weight_accum", &cle);
+ CL_FAIL_ON_ERROR(AVERROR(EIO), "Failed to create accum kernel %d.\n", cle);
+
+ ctx->average_kernel = clCreateKernel(ctx->ocf.program, "average", &cle);
+ CL_FAIL_ON_ERROR(AVERROR(EIO), "Failed to create average kernel %d.\n", cle);
+
+ ctx->initialised = 1;
+ return 0;
+
+fail:
+ if (ctx->command_queue)
+ clReleaseCommandQueue(ctx->command_queue);
+ if (ctx->vert_kernel)
+ clReleaseKernel(ctx->vert_kernel);
+ if (ctx->horiz_kernel)
+ clReleaseKernel(ctx->horiz_kernel);
+ if (ctx->accum_kernel)
+ clReleaseKernel(ctx->accum_kernel);
+ if (ctx->average_kernel)
+ clReleaseKernel(ctx->average_kernel);
+ return err;
+}
+
+static int nlmeans_plane(AVFilterContext *avctx, cl_mem dst, cl_mem src,
+ int w, int h, int p, int r)
+{
+ NLMeansOpenCLContext *ctx = avctx->priv;
+ const float zero = 0.0f;
+ const size_t worksize1[] = {h};
+ const size_t worksize2[] = {w};
+ const size_t worksize3[2] = {w, h};
+ int dx, dy, err = 0, weight_buf_size;
+ cl_mem ii, weight, sum;
+ cl_int cle;
+ int nb_pixel, *tmp, *dxdy, idx = 0;
+
+ weight_buf_size = w * h * sizeof(int);
+ ii = clCreateBuffer(ctx->ocf.hwctx->context, 0, 4 * weight_buf_size,
+ NULL, &cle);
+ weight = clCreateBuffer(ctx->ocf.hwctx->context, 0, weight_buf_size,
+ NULL, &cle);
+ sum = clCreateBuffer(ctx->ocf.hwctx->context, 0, weight_buf_size,
+ NULL, &cle);
+ cle = clEnqueueFillBuffer(ctx->command_queue, weight, &zero, sizeof(float),
+ 0, weight_buf_size, 0, NULL, NULL);
+ CL_FAIL_ON_ERROR(AVERROR(EIO), "Failed to fill weight buffer: %d.\n",
+ cle);
+ cle = clEnqueueFillBuffer(ctx->command_queue, sum, &zero, sizeof(float),
+ 0, weight_buf_size, 0, NULL, NULL);
+ CL_FAIL_ON_ERROR(AVERROR(EIO), "Failed to fill sum buffer: %d.\n",
+ cle);
+
+ nb_pixel = (2*r+1) *(2*r+1)-1;
+ dxdy = av_malloc(nb_pixel * 2 * sizeof(int));
+ tmp = av_malloc(nb_pixel * 2 * sizeof(int));
+
+ if (!dxdy || !tmp)
+ goto fail;
+
+ for (dx = -r; dx <= r; dx++) {
+ for (dy = -r; dy <= r; dy++) {
+ if (dx || dy) {
+ tmp[idx++] = dx;
+ tmp[idx++] = dy;
+ }
+ }
+ }
+ // repack dx/dy seperately, as we want to do four pairs of dx/dy in a batch
+ for (int i = 0; i < nb_pixel/4;i++) {
+ dxdy[i * 8] = tmp[i * 8]; // dx0
+ dxdy[i * 8 + 1] = tmp[i * 8 + 2]; // dx1
+ dxdy[i * 8 + 2] = tmp[i * 8 + 4]; // dx2
+ dxdy[i * 8 + 3] = tmp[i * 8 + 6]; // dx3
+ dxdy[i * 8 + 4] = tmp[i * 8 + 1]; // dy0
+ dxdy[i * 8 + 5] = tmp[i * 8 + 3]; // dy1
+ dxdy[i * 8 + 6] = tmp[i * 8 + 5]; // dy2
+ dxdy[i * 8 + 7] = tmp[i * 8 + 7]; // dy3
+ }
+ av_freep(&tmp);
+
+ for (int i = 0; i < nb_pixel / 4; i++) {
+ int *dx_cur = dxdy + 8 * i;
+ int *dy_cur = dxdy + 8 * i + 4;
+
+ // ii(x,y) = sum of [u(i,y) - u(i+dx,y+dy)]^2 for all i < x
+ CL_SET_KERNEL_ARG(ctx->horiz_kernel, 0, cl_mem, &ii);
+ CL_SET_KERNEL_ARG(ctx->horiz_kernel, 1, cl_mem, &src);
+ CL_SET_KERNEL_ARG(ctx->horiz_kernel, 2, cl_int, &w);
+ CL_SET_KERNEL_ARG(ctx->horiz_kernel, 3, cl_int, &h);
+ CL_SET_KERNEL_ARG(ctx->horiz_kernel, 4, cl_int4, dx_cur);
+ CL_SET_KERNEL_ARG(ctx->horiz_kernel, 5, cl_int4, dy_cur);
+ cle = clEnqueueNDRangeKernel(ctx->command_queue, ctx->horiz_kernel, 1,
+ NULL, worksize1, NULL, 0, NULL, NULL);
+ CL_FAIL_ON_ERROR(AVERROR(EIO), "Failed to enqueue horiz_kernel: %d.\n",
+ cle);
+
+ // ii(x,y) = ii(x,0) + ii(x,1) +...+ ii(x,y-1)
+ CL_SET_KERNEL_ARG(ctx->vert_kernel, 0, cl_mem, &ii);
+ CL_SET_KERNEL_ARG(ctx->vert_kernel, 1, cl_int, &w);
+ CL_SET_KERNEL_ARG(ctx->vert_kernel, 2, cl_int, &h);
+ cle = clEnqueueNDRangeKernel(ctx->command_queue, ctx->vert_kernel,
+ 1, NULL, worksize2, NULL, 0, NULL, NULL);
+ CL_FAIL_ON_ERROR(AVERROR(EIO), "Failed to enqueue vert_kernel: %d.\n",
+ cle);
+
+ // accumlate weights
+ CL_SET_KERNEL_ARG(ctx->accum_kernel, 0, cl_mem, &sum);
+ CL_SET_KERNEL_ARG(ctx->accum_kernel, 1, cl_mem, &weight);
+ CL_SET_KERNEL_ARG(ctx->accum_kernel, 2, cl_mem, &ii);
+ CL_SET_KERNEL_ARG(ctx->accum_kernel, 3, cl_mem, &src);
+ CL_SET_KERNEL_ARG(ctx->accum_kernel, 4, cl_int, &w);
+ CL_SET_KERNEL_ARG(ctx->accum_kernel, 5, cl_int, &h);
+ CL_SET_KERNEL_ARG(ctx->accum_kernel, 6, cl_int, &p);
+ CL_SET_KERNEL_ARG(ctx->accum_kernel, 7, cl_float, &ctx->h);
+ CL_SET_KERNEL_ARG(ctx->accum_kernel, 8, cl_int4, dx_cur);
+ CL_SET_KERNEL_ARG(ctx->accum_kernel, 9, cl_int4, dy_cur);
+ cle = clEnqueueNDRangeKernel(ctx->command_queue, ctx->accum_kernel,
+ 2, NULL, worksize3, NULL, 0, NULL, NULL);
+ CL_FAIL_ON_ERROR(AVERROR(EIO), "Failed to enqueue kernel: %d.\n", cle);
+ }
+ av_freep(&dxdy);
+
+ // average
+ CL_SET_KERNEL_ARG(ctx->average_kernel, 0, cl_mem, &dst);
+ CL_SET_KERNEL_ARG(ctx->average_kernel, 1, cl_mem, &src);
+ CL_SET_KERNEL_ARG(ctx->average_kernel, 2, cl_mem, &sum);
+ CL_SET_KERNEL_ARG(ctx->average_kernel, 3, cl_mem, &weight);
+ cle = clEnqueueNDRangeKernel(ctx->command_queue, ctx->average_kernel, 2,
+ NULL, worksize3, NULL, 0, NULL, NULL);
+ CL_FAIL_ON_ERROR(AVERROR(EIO), "Failed to enqueue average kernel: %d.\n",
+ cle);
+ cle = clFinish(ctx->command_queue);
+ CL_FAIL_ON_ERROR(AVERROR(EIO), "Failed to finish kernel: %d.\n", cle);
+fail:
+ if (tmp)
+ av_freep(&tmp);
+ if (dxdy)
+ av_freep(&dxdy);
+ clFinish(ctx->command_queue);
+ clReleaseMemObject(ii);
+ clReleaseMemObject(weight);
+ clReleaseMemObject(sum);
+ return err;
+}
+
+static int nlmeans_opencl_filter_frame(AVFilterLink *inlink, AVFrame *input)
+{
+ AVFilterContext *avctx = inlink->dst;
+ AVFilterLink *outlink = avctx->outputs[0];
+ NLMeansOpenCLContext *ctx = avctx->priv;
+ AVFrame *output = NULL;
+ AVHWFramesContext *input_frames_ctx;
+ const AVPixFmtDescriptor *desc;
+ enum AVPixelFormat in_format;
+ cl_mem src, dst;
+ int w, h, err, p, patch, research;
+
+ 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);
+ input_frames_ctx = (AVHWFramesContext*)input->hw_frames_ctx->data;
+ in_format = input_frames_ctx->sw_format;
+
+ 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 (!ctx->initialised) {
+ desc = av_pix_fmt_desc_get(in_format);
+ if (!is_format_supported(in_format)) {
+ err = AVERROR(EINVAL);
+ av_log(avctx, AV_LOG_ERROR, "input format %s not supported\n",
+ av_get_pix_fmt_name(in_format));
+ goto fail;
+ }
+ ctx->chroma_w = AV_CEIL_RSHIFT(inlink->w, desc->log2_chroma_w);
+ ctx->chroma_h = AV_CEIL_RSHIFT(inlink->h, desc->log2_chroma_h);
+
+ err = nlmeans_opencl_init(avctx);
+ if (err < 0)
+ goto fail;
+ }
+
+ for (p = 0; p < FF_ARRAY_ELEMS(output->data); p++) {
+ src = (cl_mem) input->data[p];
+ dst = (cl_mem) output->data[p];
+
+ if (!dst)
+ break;
+ w = p ? ctx->chroma_w : inlink->w;
+ h = p ? ctx->chroma_h : inlink->h;
+ patch = (p ? ctx->patch_size_uv : ctx->patch_size) / 2;
+ research = (p ? ctx->research_size_uv : ctx->research_size) / 2;
+ err = nlmeans_plane(avctx, dst, src, w, h, patch, research);
+ if (err < 0)
+ 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;
+}
+
+#define RELEASE_KERNEL(k) \
+do { \
+ if (k) { \
+ cle = clReleaseKernel(k); \
+ if (cle != CL_SUCCESS) \
+ av_log(avctx, AV_LOG_ERROR, "Failed to release " \
+ "kernel: %d.\n", cle); \
+ } \
+} while(0)
+
+static av_cold void nlmeans_opencl_uninit(AVFilterContext *avctx)
+{
+ NLMeansOpenCLContext *ctx = avctx->priv;
+ cl_int cle;
+
+ RELEASE_KERNEL(ctx->vert_kernel);
+ RELEASE_KERNEL(ctx->horiz_kernel);
+ RELEASE_KERNEL(ctx->accum_kernel);
+ RELEASE_KERNEL(ctx->average_kernel);
+
+ 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(NLMeansOpenCLContext, x)
+#define FLAGS (AV_OPT_FLAG_FILTERING_PARAM | AV_OPT_FLAG_VIDEO_PARAM)
+static const AVOption nlmeans_opencl_options[] = {
+ { "s", "denoising strength", OFFSET(sigma), AV_OPT_TYPE_DOUBLE, { .dbl = 1.0 }, 1.0, 30.0, FLAGS },
+ { "p", "patch size", OFFSET(patch_size), AV_OPT_TYPE_INT, { .i64 = 2*3+1 }, 0, 99, FLAGS },
+ { "pc", "patch size for chroma planes", OFFSET(patch_size_uv), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 99, FLAGS },
+ { "r", "research window", OFFSET(research_size), AV_OPT_TYPE_INT, { .i64 = 7*2+1 }, 0, 99, FLAGS },
+ { "rc", "research window for chroma planes", OFFSET(research_size_uv), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 99, FLAGS },
+ { NULL }
+};
+
+AVFILTER_DEFINE_CLASS(nlmeans_opencl);
+
+static const AVFilterPad nlmeans_opencl_inputs[] = {
+ {
+ .name = "default",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .filter_frame = &nlmeans_opencl_filter_frame,
+ .config_props = &ff_opencl_filter_config_input,
+ },
+ { NULL }
+};
+
+static const AVFilterPad nlmeans_opencl_outputs[] = {
+ {
+ .name = "default",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .config_props = &ff_opencl_filter_config_output,
+ },
+ { NULL }
+};
+
+AVFilter ff_vf_nlmeans_opencl = {
+ .name = "nlmeans_opencl",
+ .description = NULL_IF_CONFIG_SMALL("Non-local means denoiser through OpenCL"),
+ .priv_size = sizeof(NLMeansOpenCLContext),
+ .priv_class = &nlmeans_opencl_class,
+ .init = &ff_opencl_filter_init,
+ .uninit = &nlmeans_opencl_uninit,
+ .query_formats = &ff_opencl_filter_query_formats,
+ .inputs = nlmeans_opencl_inputs,
+ .outputs = nlmeans_opencl_outputs,
+ .flags_internal = FF_FILTER_FLAG_HWFRAME_AWARE,
+};
--
2.17.1
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