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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/opt.h"
#include "libavutil/vulkan_spirv.h"
#include "vulkan_filter.h"
#include "filters.h"
#include "video.h"
typedef struct ChromaticAberrationVulkanContext {
FFVulkanContext vkctx;
int initialized;
FFVkExecPool e;
FFVkQueueFamilyCtx qf;
FFVulkanShader shd;
VkSampler sampler;
/* Push constants / options */
struct {
float dist[2];
} opts;
} ChromaticAberrationVulkanContext;
static const char distort_chroma_kernel[] = {
C(0, void distort_rgb(ivec2 size, ivec2 pos) )
C(0, { )
C(1, const vec2 p = ((vec2(pos)/vec2(size)) - 0.5f)*2.0f; )
C(1, const vec2 o = p * (dist - 1.0f); )
C(0, )
C(1, vec4 res; )
C(1, res.r = texture(input_img[0], ((p - o)/2.0f) + 0.5f).r; )
C(1, res.g = texture(input_img[0], ((p )/2.0f) + 0.5f).g; )
C(1, res.b = texture(input_img[0], ((p + o)/2.0f) + 0.5f).b; )
C(1, res.a = texture(input_img[0], ((p )/2.0f) + 0.5f).a; )
C(1, imageStore(output_img[0], pos, res); )
C(0, } )
C(0, )
C(0, void distort_chroma(int idx, ivec2 size, ivec2 pos) )
C(0, { )
C(1, vec2 p = ((vec2(pos)/vec2(size)) - 0.5f)*2.0f; )
C(1, float d = sqrt(p.x*p.x + p.y*p.y); )
C(1, p *= d / (d*dist); )
C(1, vec4 res = texture(input_img[idx], (p/2.0f) + 0.5f); )
C(1, imageStore(output_img[idx], pos, res); )
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;
ChromaticAberrationVulkanContext *s = ctx->priv;
FFVulkanContext *vkctx = &s->vkctx;
const int planes = av_pix_fmt_count_planes(s->vkctx.output_format);
FFVulkanShader *shd = &s->shd;
FFVkSPIRVCompiler *spv;
FFVulkanDescriptorSetBinding *desc;
/* Normalize options */
s->opts.dist[0] = (s->opts.dist[0] / 100.0f) + 1.0f;
s->opts.dist[1] = (s->opts.dist[1] / 100.0f) + 1.0f;
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, 0, VK_FILTER_LINEAR));
RET(ff_vk_shader_init(vkctx, &s->shd, "chromatic_abberation",
VK_SHADER_STAGE_COMPUTE_BIT,
NULL, 0,
32, 32, 1,
0));
GLSLC(0, layout(push_constant, std430) uniform pushConstants { );
GLSLC(1, vec2 dist; );
GLSLC(0, }; );
GLSLC(0, );
ff_vk_shader_add_push_const(&s->shd, 0, sizeof(s->opts),
VK_SHADER_STAGE_COMPUTE_BIT);
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),
.mem_quali = "writeonly",
.dimensions = 2,
.elems = planes,
.stages = VK_SHADER_STAGE_COMPUTE_BIT,
},
};
RET(ff_vk_shader_add_descriptor_set(vkctx, &s->shd, desc, 2, 0, 0));
GLSLD( distort_chroma_kernel );
GLSLC(0, void main() );
GLSLC(0, { );
GLSLC(1, ivec2 pos = ivec2(gl_GlobalInvocationID.xy); );
if (planes == 1) {
GLSLC(1, distort_rgb(imageSize(output_img[0]), pos); );
} else {
GLSLC(1, ivec2 size = imageSize(output_img[0]); );
GLSLC(1, vec2 npos = vec2(pos)/vec2(size); );
GLSLC(1, vec4 res = texture(input_img[0], npos); );
GLSLC(1, imageStore(output_img[0], pos, res); );
for (int i = 1; i < planes; i++) {
GLSLC(0, );
GLSLF(1, size = imageSize(output_img[%i]); ,i);
GLSLC(1, if (!IS_WITHIN(pos, size)) );
GLSLC(2, return; );
GLSLF(1, distort_chroma(%i, size, pos); ,i);
}
}
GLSLC(0, } );
RET(spv->compile_shader(vkctx, spv, shd, &spv_data, &spv_len, "main",
&spv_opaque));
RET(ff_vk_shader_link(vkctx, shd, spv_data, spv_len, "main"));
RET(ff_vk_shader_register_exec(vkctx, &s->e, &s->shd));
s->initialized = 1;
fail:
if (spv_opaque)
spv->free_shader(spv, &spv_opaque);
if (spv)
spv->uninit(&spv);
return err;
}
static int chromaber_vulkan_filter_frame(AVFilterLink *link, AVFrame *in)
{
int err;
AVFilterContext *ctx = link->dst;
ChromaticAberrationVulkanContext *s = ctx->priv;
AVFilterLink *outlink = ctx->outputs[0];
AVFrame *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 chromaber_vulkan_uninit(AVFilterContext *avctx)
{
ChromaticAberrationVulkanContext *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(ChromaticAberrationVulkanContext, x)
#define FLAGS (AV_OPT_FLAG_FILTERING_PARAM | AV_OPT_FLAG_VIDEO_PARAM)
static const AVOption chromaber_vulkan_options[] = {
{ "dist_x", "Set horizontal distortion amount", OFFSET(opts.dist[0]), AV_OPT_TYPE_FLOAT, {.dbl = 0.0f}, -10.0f, 10.0f, .flags = FLAGS },
{ "dist_y", "Set vertical distortion amount", OFFSET(opts.dist[1]), AV_OPT_TYPE_FLOAT, {.dbl = 0.0f}, -10.0f, 10.0f, .flags = FLAGS },
{ NULL },
};
AVFILTER_DEFINE_CLASS(chromaber_vulkan);
static const AVFilterPad chromaber_vulkan_inputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.filter_frame = &chromaber_vulkan_filter_frame,
.config_props = &ff_vk_filter_config_input,
},
};
static const AVFilterPad chromaber_vulkan_outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = &ff_vk_filter_config_output,
},
};
const AVFilter ff_vf_chromaber_vulkan = {
.name = "chromaber_vulkan",
.description = NULL_IF_CONFIG_SMALL("Offset chroma of input video (chromatic aberration)"),
.priv_size = sizeof(ChromaticAberrationVulkanContext),
.init = &ff_vk_filter_init,
.uninit = &chromaber_vulkan_uninit,
FILTER_INPUTS(chromaber_vulkan_inputs),
FILTER_OUTPUTS(chromaber_vulkan_outputs),
FILTER_SINGLE_PIXFMT(AV_PIX_FMT_VULKAN),
.priv_class = &chromaber_vulkan_class,
.flags_internal = FF_FILTER_FLAG_HWFRAME_AWARE,
.flags = AVFILTER_FLAG_HWDEVICE,
};
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