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/*
* Copyright (c) Lynne
*
* 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/random_seed.h"
#include "libavutil/vulkan_spirv.h"
#include "libavutil/opt.h"
#include "vulkan_filter.h"
#include "filters.h"
#include "video.h"
typedef struct AvgBlurVulkanContext {
FFVulkanContext vkctx;
int initialized;
FFVkExecPool e;
FFVkQueueFamilyCtx qf;
VkSampler sampler;
FFVulkanShader shd;
/* Push constants / options */
struct {
float filter_norm[4];
int32_t filter_len[2];
} opts;
int size_x;
int size_y;
int planes;
} AvgBlurVulkanContext;
static const char blur_kernel[] = {
C(0, void distort(const ivec2 pos, const int idx) )
C(0, { )
C(1, vec4 sum = vec4(0); )
C(1, for (int y = -filter_len.y; y <= filter_len.y; y++) )
C(1, for (int x = -filter_len.x; x <= filter_len.x; x++) )
C(2, sum += texture(input_img[idx], pos + ivec2(x, y)); )
C(0, )
C(1, imageStore(output_img[idx], pos, sum * filter_norm); )
C(0, } )
};
static av_cold int init_filter(AVFilterContext *ctx, AVFrame *in)
{
int err;
uint8_t *spv_data;
size_t spv_len;
void *spv_opaque = NULL;
AvgBlurVulkanContext *s = ctx->priv;
FFVulkanContext *vkctx = &s->vkctx;
const int planes = av_pix_fmt_count_planes(s->vkctx.output_format);
FFVulkanShader *shd;
FFVkSPIRVCompiler *spv;
FFVulkanDescriptorSetBinding *desc;
spv = ff_vk_spirv_init();
if (!spv) {
av_log(ctx, AV_LOG_ERROR, "Unable to initialize SPIR-V compiler!\n");
return AVERROR_EXTERNAL;
}
ff_vk_qf_init(vkctx, &s->qf, VK_QUEUE_COMPUTE_BIT);
RET(ff_vk_exec_pool_init(vkctx, &s->qf, &s->e, s->qf.nb_queues*4, 0, 0, 0, NULL));
RET(ff_vk_init_sampler(vkctx, &s->sampler, 1, VK_FILTER_LINEAR));
RET(ff_vk_shader_init(vkctx, &s->shd, "avgblur",
VK_SHADER_STAGE_COMPUTE_BIT,
NULL, 0,
32, 1, 1,
0));
shd = &s->shd;
desc = (FFVulkanDescriptorSetBinding []) {
{
.name = "input_img",
.type = VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER,
.dimensions = 2,
.elems = planes,
.stages = VK_SHADER_STAGE_COMPUTE_BIT,
.samplers = DUP_SAMPLER(s->sampler),
},
{
.name = "output_img",
.type = VK_DESCRIPTOR_TYPE_STORAGE_IMAGE,
.mem_layout = ff_vk_shader_rep_fmt(s->vkctx.output_format, FF_VK_REP_FLOAT),
.mem_quali = "writeonly",
.dimensions = 2,
.elems = planes,
.stages = VK_SHADER_STAGE_COMPUTE_BIT,
},
};
RET(ff_vk_shader_add_descriptor_set(vkctx, shd, desc, 2, 0, 0));
GLSLC(0, layout(push_constant, std430) uniform pushConstants { );
GLSLC(1, vec4 filter_norm; );
GLSLC(1, ivec2 filter_len; );
GLSLC(0, }; );
GLSLC(0, );
ff_vk_shader_add_push_const(&s->shd, 0, sizeof(s->opts),
VK_SHADER_STAGE_COMPUTE_BIT);
GLSLD( blur_kernel );
GLSLC(0, void main() );
GLSLC(0, { );
GLSLC(1, ivec2 size; );
GLSLC(1, const ivec2 pos = ivec2(gl_GlobalInvocationID.xy); );
for (int i = 0; i < planes; i++) {
GLSLC(0, );
GLSLF(1, size = imageSize(output_img[%i]); ,i);
GLSLC(1, if (!IS_WITHIN(pos, size)) );
GLSLC(2, return; );
if (s->planes & (1 << i)) {
GLSLF(1, distort(pos, %i); ,i);
} else {
GLSLF(1, vec4 res = texture(input_img[%i], pos); ,i);
GLSLF(1, imageStore(output_img[%i], pos, res); ,i);
}
}
GLSLC(0, } );
RET(spv->compile_shader(vkctx, spv, &s->shd, &spv_data, &spv_len, "main",
&spv_opaque));
RET(ff_vk_shader_link(vkctx, &s->shd, spv_data, spv_len, "main"));
RET(ff_vk_shader_register_exec(vkctx, &s->e, &s->shd));
s->initialized = 1;
s->opts.filter_len[0] = s->size_x - 1;
s->opts.filter_len[1] = s->size_y - 1;
s->opts.filter_norm[0] = s->opts.filter_len[0]*2 + 1;
s->opts.filter_norm[0] = 1.0/(s->opts.filter_norm[0]*s->opts.filter_norm[0]);
s->opts.filter_norm[1] = s->opts.filter_norm[0];
s->opts.filter_norm[2] = s->opts.filter_norm[0];
s->opts.filter_norm[3] = s->opts.filter_norm[0];
fail:
if (spv_opaque)
spv->free_shader(spv, &spv_opaque);
if (spv)
spv->uninit(&spv);
return err;
}
static int avgblur_vulkan_filter_frame(AVFilterLink *link, AVFrame *in)
{
int err;
AVFrame *out = NULL;
AVFilterContext *ctx = link->dst;
AvgBlurVulkanContext *s = ctx->priv;
AVFilterLink *outlink = ctx->outputs[0];
out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
if (!out) {
err = AVERROR(ENOMEM);
goto fail;
}
if (!s->initialized)
RET(init_filter(ctx, in));
RET(ff_vk_filter_process_simple(&s->vkctx, &s->e, &s->shd,
out, in, s->sampler, &s->opts, sizeof(s->opts)));
err = av_frame_copy_props(out, in);
if (err < 0)
goto fail;
av_frame_free(&in);
return ff_filter_frame(outlink, out);
fail:
av_frame_free(&in);
av_frame_free(&out);
return err;
}
static void avgblur_vulkan_uninit(AVFilterContext *avctx)
{
AvgBlurVulkanContext *s = avctx->priv;
FFVulkanContext *vkctx = &s->vkctx;
FFVulkanFunctions *vk = &vkctx->vkfn;
ff_vk_exec_pool_free(vkctx, &s->e);
ff_vk_shader_free(vkctx, &s->shd);
if (s->sampler)
vk->DestroySampler(vkctx->hwctx->act_dev, s->sampler,
vkctx->hwctx->alloc);
ff_vk_uninit(&s->vkctx);
s->initialized = 0;
}
#define OFFSET(x) offsetof(AvgBlurVulkanContext, x)
#define FLAGS (AV_OPT_FLAG_FILTERING_PARAM | AV_OPT_FLAG_VIDEO_PARAM)
static const AVOption avgblur_vulkan_options[] = {
{ "sizeX", "Set horizontal radius", OFFSET(size_x), AV_OPT_TYPE_INT, { .i64 = 3 }, 1, 32, .flags = FLAGS },
{ "sizeY", "Set vertical radius", OFFSET(size_y), AV_OPT_TYPE_INT, { .i64 = 3 }, 1, 32, .flags = FLAGS },
{ "planes", "Set planes to filter (bitmask)", OFFSET(planes), AV_OPT_TYPE_INT, {.i64 = 0xF}, 0, 0xF, .flags = FLAGS },
{ NULL },
};
AVFILTER_DEFINE_CLASS(avgblur_vulkan);
static const AVFilterPad avgblur_vulkan_inputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.filter_frame = &avgblur_vulkan_filter_frame,
.config_props = &ff_vk_filter_config_input,
},
};
static const AVFilterPad avgblur_vulkan_outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = &ff_vk_filter_config_output,
},
};
const AVFilter ff_vf_avgblur_vulkan = {
.name = "avgblur_vulkan",
.description = NULL_IF_CONFIG_SMALL("Apply avgblur mask to input video"),
.priv_size = sizeof(AvgBlurVulkanContext),
.init = &ff_vk_filter_init,
.uninit = &avgblur_vulkan_uninit,
FILTER_INPUTS(avgblur_vulkan_inputs),
FILTER_OUTPUTS(avgblur_vulkan_outputs),
FILTER_SINGLE_PIXFMT(AV_PIX_FMT_VULKAN),
.priv_class = &avgblur_vulkan_class,
.flags_internal = FF_FILTER_FLAG_HWFRAME_AWARE,
.flags = AVFILTER_FLAG_HWDEVICE,
};
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