On Mon, Apr 1, 2019 at 3:53 PM Ruiling Song <ruiling.s...@intel.com> wrote:
> Signed-off-by: Ruiling Song <ruiling.s...@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
>
> +@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,
> +};
>
> Can you supply some details performance data ?
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