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libavfilter: Add OpenCL convolution filter 

Behaves like existing convolution filter.

Signed-off-by: Mark Thompson <sw@jkqxz.net>
tags/n4.0
Danil Iashchenko Mark Thompson 8 years ago
parent
cfe1a9d311
commit
9f17875134
6 changed files with 418 additions and 0 deletions
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  1. +1
    -0
      configure
  2. +2
    -0
      libavfilter/Makefile
  3. +1
    -0
      libavfilter/allfilters.c
  4. +45
    -0
      libavfilter/opencl/convolution.cl
  5. +1
    -0
      libavfilter/opencl_source.h
  6. +368
    -0
      libavfilter/vf_convolution_opencl.c

+ 1
- 0
configure View File

@@ -3235,6 +3235,7 @@ blackframe_filter_deps="gpl"
boxblur_filter_deps="gpl"
bs2b_filter_deps="libbs2b"
colormatrix_filter_deps="gpl"
convolution_opencl_filter_deps="opencl"
convolve_filter_deps="avcodec"
convolve_filter_select="fft"
coreimage_filter_deps="coreimage appkit"


+ 2
- 0
libavfilter/Makefile View File

@@ -159,6 +159,8 @@ OBJS-$(CONFIG_COLORLEVELS_FILTER) += vf_colorlevels.o
OBJS-$(CONFIG_COLORMATRIX_FILTER) += vf_colormatrix.o
OBJS-$(CONFIG_COLORSPACE_FILTER) += vf_colorspace.o colorspacedsp.o
OBJS-$(CONFIG_CONVOLUTION_FILTER) += vf_convolution.o
OBJS-$(CONFIG_CONVOLUTION_OPENCL_FILTER) += vf_convolution_opencl.o opencl.o \
opencl/convolution.o
OBJS-$(CONFIG_CONVOLVE_FILTER) += vf_convolve.o framesync.o
OBJS-$(CONFIG_COPY_FILTER) += vf_copy.o
OBJS-$(CONFIG_COREIMAGE_FILTER) += vf_coreimage.o


+ 1
- 0
libavfilter/allfilters.c View File

@@ -168,6 +168,7 @@ static void register_all(void)
REGISTER_FILTER(COLORMATRIX, colormatrix, vf);
REGISTER_FILTER(COLORSPACE, colorspace, vf);
REGISTER_FILTER(CONVOLUTION, convolution, vf);
REGISTER_FILTER(CONVOLUTION_OPENCL, convolution_opencl, vf);
REGISTER_FILTER(CONVOLVE, convolve, vf);
REGISTER_FILTER(COPY, copy, vf);
REGISTER_FILTER(COREIMAGE, coreimage, vf);


+ 45
- 0
libavfilter/opencl/convolution.cl View File

@@ -0,0 +1,45 @@
/*
* Copyright (c) 2018 Danil Iashchenko
*
* 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 convolution_global(__write_only image2d_t dst,
__read_only image2d_t src,
int coef_matrix_dim,
__constant float *coef_matrix,
float div,
float bias)
{
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_i = -half_matrix_dim; conv_i <= half_matrix_dim; conv_i++) {
for (int conv_j = -half_matrix_dim; conv_j <= half_matrix_dim; conv_j++) {
float4 px = read_imagef(src, sampler, loc + (int2)(conv_j, conv_i));
convPix += px * coef_matrix[(conv_i + half_matrix_dim) * coef_matrix_dim +
(conv_j + half_matrix_dim)];
}
}
float4 dstPix = convPix * div + bias;
write_imagef(dst, loc, dstPix);
}

+ 1
- 0
libavfilter/opencl_source.h View File

@@ -20,6 +20,7 @@
#define AVFILTER_OPENCL_SOURCE_H

extern const char *ff_opencl_source_avgblur;
extern const char *ff_opencl_source_convolution;
extern const char *ff_opencl_source_overlay;
extern const char *ff_opencl_source_unsharp;



+ 368
- 0
libavfilter/vf_convolution_opencl.c View File

@@ -0,0 +1,368 @@
/*
* Copyright (c) 2018 Danil Iashchenko
*
* 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/mem.h"
#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
#include "libavutil/avstring.h"


#include "avfilter.h"
#include "internal.h"
#include "opencl.h"
#include "opencl_source.h"
#include "video.h"

typedef struct ConvolutionOpenCLContext {
OpenCLFilterContext ocf;

int initialised;
cl_kernel kernel;
cl_command_queue command_queue;

char *matrix_str[4];

cl_mem matrix[4];
cl_int matrix_sizes[4];
cl_int dims[4];
cl_float rdivs[4];
cl_float biases[4];

} ConvolutionOpenCLContext;


static int convolution_opencl_init(AVFilterContext *avctx)
{
ConvolutionOpenCLContext *ctx = avctx->priv;
cl_int cle;
int err;

err = ff_opencl_filter_load_program(avctx, &ff_opencl_source_convolution, 1);
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, "convolution_global", &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 convolution_opencl_make_filter_params(AVFilterContext *avctx)
{
ConvolutionOpenCLContext *ctx = avctx->priv;
float *matrix = NULL;
size_t matrix_bytes;
cl_mem buffer;
cl_int cle;
int i, j;
int sscanf_err;
char *p, *arg, *saveptr = NULL;
float input_matrix[4][49];

for (i = 0; i < 4; i++) {
ctx->biases[i] = ctx->biases[i] / 255.0;
}

for (i = 0; i < 4; i++) {
p = ctx->matrix_str[i];
while (ctx->matrix_sizes[i] < 49) {
arg = av_strtok(p, " ", &saveptr);
if (!arg) {
break;
}
p = NULL;
sscanf_err = sscanf(arg, "%f", &input_matrix[i][ctx->matrix_sizes[i]]);
if (sscanf_err != 1) {
av_log(ctx, AV_LOG_ERROR, "Matrix is sequence of 9, 25 or 49 signed numbers\n");
return AVERROR(EINVAL);
}
ctx->matrix_sizes[i]++;
}
if (ctx->matrix_sizes[i] == 9) {
ctx->dims[i] = 3;
} else if (ctx->matrix_sizes[i] == 25) {
ctx->dims[i] = 5;
} else if (ctx->matrix_sizes[i] == 49) {
ctx->dims[i] = 7;
} else {
av_log(ctx, AV_LOG_ERROR, "Invalid matrix size:%d\n", ctx->matrix_sizes[i]);
return AVERROR(EINVAL);
}

}

for (j = 0; j < 4; j++) {
matrix_bytes = sizeof(float)*ctx->matrix_sizes[j];
matrix = av_malloc(matrix_bytes);
if (!matrix) {
av_freep(&matrix);
return AVERROR(ENOMEM);
}

for (i = 0; i < ctx->matrix_sizes[j]; i++)
matrix[i] = input_matrix[j][i];

buffer = clCreateBuffer(ctx->ocf.hwctx->context,
CL_MEM_READ_ONLY |
CL_MEM_COPY_HOST_PTR |
CL_MEM_HOST_NO_ACCESS,
matrix_bytes, matrix, &cle);
if (!buffer) {
av_log(avctx, AV_LOG_ERROR, "Failed to create matrix buffer: "
"%d.\n", cle);
av_freep(&matrix);
return AVERROR(EIO);
}
ctx->matrix[j] = buffer;
av_freep(&matrix);
}

return 0;
}

static int convolution_opencl_filter_frame(AVFilterLink *inlink, AVFrame *input)
{
AVFilterContext *avctx = inlink->dst;
AVFilterLink *outlink = avctx->outputs[0];
ConvolutionOpenCLContext *ctx = avctx->priv;
AVFrame *output = NULL;
cl_int cle;
size_t global_work[2];
cl_mem src, dst;
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 = convolution_opencl_init(avctx);
if (err < 0)
goto fail;

err = convolution_opencl_make_filter_params(avctx);
if (err < 0)
goto fail;
}

output = ff_get_video_buffer(outlink, outlink->w, outlink->h);
if (!output) {
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];

if (!dst)
break;

cle = clSetKernelArg(ctx->kernel, 0, sizeof(cl_mem), &dst);
if (cle != CL_SUCCESS) {
av_log(avctx, AV_LOG_ERROR, "Failed to set kernel "
"destination image argument: %d.\n", cle);
goto fail;
}
cle = clSetKernelArg(ctx->kernel, 1, sizeof(cl_mem), &src);
if (cle != CL_SUCCESS) {
av_log(avctx, AV_LOG_ERROR, "Failed to set kernel "
"source image argument: %d.\n", cle);
goto fail;
}
cle = clSetKernelArg(ctx->kernel, 2, sizeof(cl_int), &ctx->dims[p]);
if (cle != CL_SUCCESS) {
av_log(avctx, AV_LOG_ERROR, "Failed to set kernel "
"matrix size argument: %d.\n", cle);
goto fail;
}
cle = clSetKernelArg(ctx->kernel, 3, sizeof(cl_mem), &ctx->matrix[p]);
if (cle != CL_SUCCESS) {
av_log(avctx, AV_LOG_ERROR, "Failed to set kernel "
"matrix argument: %d.\n", cle);
goto fail;
}
cle = clSetKernelArg(ctx->kernel, 4, sizeof(cl_float), &ctx->rdivs[p]);
if (cle != CL_SUCCESS) {
av_log(avctx, AV_LOG_ERROR, "Failed to set kernel "
"rdiv argument: %d.\n", cle);
goto fail;
}
cle = clSetKernelArg(ctx->kernel, 5, sizeof(cl_float), &ctx->biases[p]);
if (cle != CL_SUCCESS) {
av_log(avctx, AV_LOG_ERROR, "Failed to set kernel "
"bias argument: %d.\n", cle);
goto fail;
}


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, 2, NULL,
global_work, NULL,
0, NULL, NULL);
if (cle != CL_SUCCESS) {
av_log(avctx, AV_LOG_ERROR, "Failed to enqueue kernel: %d.\n",
cle);
err = AVERROR(EIO);
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;
}

err = av_frame_copy_props(output, input);
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;
}

static av_cold void convolution_opencl_uninit(AVFilterContext *avctx)
{
ConvolutionOpenCLContext *ctx = avctx->priv;
cl_int cle;
int i;

for (i = 0; i < 4; i++) {
clReleaseMemObject(ctx->matrix[i]);
}

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(ConvolutionOpenCLContext, x)
#define FLAGS (AV_OPT_FLAG_FILTERING_PARAM | AV_OPT_FLAG_VIDEO_PARAM)
static const AVOption convolution_opencl_options[] = {
{ "0m", "set matrix for 2nd plane", OFFSET(matrix_str[0]), AV_OPT_TYPE_STRING, {.str="0 0 0 0 1 0 0 0 0"}, 0, 0, FLAGS },
{ "1m", "set matrix for 2nd plane", OFFSET(matrix_str[1]), AV_OPT_TYPE_STRING, {.str="0 0 0 0 1 0 0 0 0"}, 0, 0, FLAGS },
{ "2m", "set matrix for 3rd plane", OFFSET(matrix_str[2]), AV_OPT_TYPE_STRING, {.str="0 0 0 0 1 0 0 0 0"}, 0, 0, FLAGS },
{ "3m", "set matrix for 4th plane", OFFSET(matrix_str[3]), AV_OPT_TYPE_STRING, {.str="0 0 0 0 1 0 0 0 0"}, 0, 0, FLAGS },
{ "0rdiv", "set rdiv for 1nd plane", OFFSET(rdivs[0]), AV_OPT_TYPE_FLOAT, {.dbl=1.0}, 0.0, INT_MAX, FLAGS},
{ "1rdiv", "set rdiv for 2nd plane", OFFSET(rdivs[1]), AV_OPT_TYPE_FLOAT, {.dbl=1.0}, 0.0, INT_MAX, FLAGS},
{ "2rdiv", "set rdiv for 3rd plane", OFFSET(rdivs[2]), AV_OPT_TYPE_FLOAT, {.dbl=1.0}, 0.0, INT_MAX, FLAGS},
{ "3rdiv", "set rdiv for 4th plane", OFFSET(rdivs[3]), AV_OPT_TYPE_FLOAT, {.dbl=1.0}, 0.0, INT_MAX, FLAGS},
{ "0bias", "set bias for 1st plane", OFFSET(biases[0]), AV_OPT_TYPE_FLOAT, {.dbl=0.0}, 0.0, INT_MAX, FLAGS},
{ "1bias", "set bias for 2nd plane", OFFSET(biases[1]), AV_OPT_TYPE_FLOAT, {.dbl=0.0}, 0.0, INT_MAX, FLAGS},
{ "2bias", "set bias for 3rd plane", OFFSET(biases[2]), AV_OPT_TYPE_FLOAT, {.dbl=0.0}, 0.0, INT_MAX, FLAGS},
{ "3bias", "set bias for 4th plane", OFFSET(biases[3]), AV_OPT_TYPE_FLOAT, {.dbl=0.0}, 0.0, INT_MAX, FLAGS},
{ NULL }
};

AVFILTER_DEFINE_CLASS(convolution_opencl);

static const AVFilterPad convolution_opencl_inputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.filter_frame = &convolution_opencl_filter_frame,
.config_props = &ff_opencl_filter_config_input,
},
{ NULL }
};

static const AVFilterPad convolution_opencl_outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = &ff_opencl_filter_config_output,
},
{ NULL }
};

AVFilter ff_vf_convolution_opencl = {
.name = "convolution_opencl",
.description = NULL_IF_CONFIG_SMALL("Apply convolution mask to input video"),
.priv_size = sizeof(ConvolutionOpenCLContext),
.priv_class = &convolution_opencl_class,
.init = &ff_opencl_filter_init,
.uninit = &convolution_opencl_uninit,
.query_formats = &ff_opencl_filter_query_formats,
.inputs = convolution_opencl_inputs,
.outputs = convolution_opencl_outputs,
.flags_internal = FF_FILTER_FLAG_HWFRAME_AWARE,
};

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