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ffmpeg/libavfilter/vf_overlay_vulkan.c

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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 "vulkan_filter.h"
#include "vulkan_spirv.h"
#include "internal.h"
#include "framesync.h"
#include "video.h"
typedef struct OverlayVulkanContext {
FFVulkanContext vkctx;
FFFrameSync fs;
int initialized;
FFVulkanPipeline pl;
FFVkExecPool e;
FFVkQueueFamilyCtx qf;
FFVkSPIRVShader shd;
VkSampler sampler;
/* Push constants / options */
struct {
int32_t o_offset[2*3];
int32_t o_size[2*3];
} opts;
int overlay_x;
int overlay_y;
int overlay_w;
int overlay_h;
} OverlayVulkanContext;
static const char overlay_noalpha[] = {
C(0, void overlay_noalpha(int i, ivec2 pos) )
C(0, { )
C(1, if ((o_offset[i].x <= pos.x) && (o_offset[i].y <= pos.y) &&
(pos.x < (o_offset[i].x + o_size[i].x)) &&
(pos.y < (o_offset[i].y + o_size[i].y))) { )
C(2, vec4 res = texture(overlay_img[i], pos - o_offset[i]); )
C(2, imageStore(output_img[i], pos, res); )
C(1, } else { )
C(2, vec4 res = texture(main_img[i], pos); )
C(2, imageStore(output_img[i], pos, res); )
C(1, } )
C(0, } )
};
static const char overlay_alpha[] = {
C(0, void overlay_alpha_opaque(int i, ivec2 pos) )
C(0, { )
C(1, vec4 res = texture(main_img[i], pos); )
C(1, if ((o_offset[i].x <= pos.x) && (o_offset[i].y <= pos.y) &&
(pos.x < (o_offset[i].x + o_size[i].x)) &&
(pos.y < (o_offset[i].y + o_size[i].y))) { )
C(2, vec4 ovr = texture(overlay_img[i], pos - o_offset[i]); )
C(2, res = ovr * ovr.a + res * (1.0f - ovr.a); )
C(2, res.a = 1.0f; )
C(2, imageStore(output_img[i], pos, res); )
C(1, } )
C(1, imageStore(output_img[i], pos, res); )
C(0, } )
};
static av_cold int init_filter(AVFilterContext *ctx)
{
int err;
uint8_t *spv_data;
size_t spv_len;
void *spv_opaque = NULL;
OverlayVulkanContext *s = ctx->priv;
FFVulkanContext *vkctx = &s->vkctx;
const int planes = av_pix_fmt_count_planes(s->vkctx.output_format);
const int ialpha = av_pix_fmt_desc_get(s->vkctx.input_format)->flags & AV_PIX_FMT_FLAG_ALPHA;
const AVPixFmtDescriptor *pix_desc = av_pix_fmt_desc_get(s->vkctx.output_format);
FFVkSPIRVShader *shd = &s->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_NEAREST));
RET(ff_vk_shader_init(&s->pl, &s->shd, "overlay_compute",
VK_SHADER_STAGE_COMPUTE_BIT, 0));
ff_vk_shader_set_compute_sizes(&s->shd, 32, 32, 1);
GLSLC(0, layout(push_constant, std430) uniform pushConstants { );
GLSLC(1, ivec2 o_offset[3]; );
GLSLC(1, ivec2 o_size[3]; );
GLSLC(0, }; );
GLSLC(0, );
ff_vk_add_push_constant(&s->pl, 0, sizeof(s->opts),
VK_SHADER_STAGE_COMPUTE_BIT);
desc = (FFVulkanDescriptorSetBinding []) {
{
.name = "main_img",
.type = VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER,
.dimensions = 2,
.elems = planes,
.stages = VK_SHADER_STAGE_COMPUTE_BIT,
.samplers = DUP_SAMPLER(s->sampler),
},
{
.name = "overlay_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_pipeline_descriptor_set_add(vkctx, &s->pl, shd, desc, 3, 0, 0));
GLSLD( overlay_noalpha );
GLSLD( overlay_alpha );
GLSLC(0, void main() );
GLSLC(0, { );
GLSLC(1, ivec2 pos = ivec2(gl_GlobalInvocationID.xy); );
GLSLF(1, int planes = %i; ,planes);
GLSLC(1, for (int i = 0; i < planes; i++) { );
if (ialpha)
GLSLC(2, overlay_alpha_opaque(i, pos); );
else
GLSLC(2, overlay_noalpha(i, pos); );
GLSLC(1, } );
GLSLC(0, } );
RET(spv->compile_shader(spv, ctx, shd, &spv_data, &spv_len, "main",
&spv_opaque));
RET(ff_vk_shader_create(vkctx, shd, spv_data, spv_len, "main"));
RET(ff_vk_init_compute_pipeline(vkctx, &s->pl, shd));
RET(ff_vk_exec_pipeline_register(vkctx, &s->e, &s->pl));
s->opts.o_offset[0] = s->overlay_x;
s->opts.o_offset[1] = s->overlay_y;
s->opts.o_offset[2] = s->opts.o_offset[0] >> pix_desc->log2_chroma_w;
s->opts.o_offset[3] = s->opts.o_offset[1] >> pix_desc->log2_chroma_h;
s->opts.o_offset[4] = s->opts.o_offset[0] >> pix_desc->log2_chroma_w;
s->opts.o_offset[5] = s->opts.o_offset[1] >> pix_desc->log2_chroma_h;
s->opts.o_size[0] = s->overlay_w;
s->opts.o_size[1] = s->overlay_h;
s->opts.o_size[2] = s->opts.o_size[0] >> pix_desc->log2_chroma_w;
s->opts.o_size[3] = s->opts.o_size[1] >> pix_desc->log2_chroma_h;
s->opts.o_size[4] = s->opts.o_size[0] >> pix_desc->log2_chroma_w;
s->opts.o_size[5] = s->opts.o_size[1] >> pix_desc->log2_chroma_h;
s->initialized = 1;
fail:
if (spv_opaque)
spv->free_shader(spv, &spv_opaque);
if (spv)
spv->uninit(&spv);
return err;
}
static int overlay_vulkan_blend(FFFrameSync *fs)
{
int err;
AVFilterContext *ctx = fs->parent;
OverlayVulkanContext *s = ctx->priv;
AVFilterLink *outlink = ctx->outputs[0];
AVFrame *input_main, *input_overlay, *out;
err = ff_framesync_get_frame(fs, 0, &input_main, 0);
if (err < 0)
goto fail;
err = ff_framesync_get_frame(fs, 1, &input_overlay, 0);
if (err < 0)
goto fail;
if (!input_main || !input_overlay)
return 0;
if (!s->initialized) {
AVHWFramesContext *main_fc = (AVHWFramesContext*)input_main->hw_frames_ctx->data;
AVHWFramesContext *overlay_fc = (AVHWFramesContext*)input_overlay->hw_frames_ctx->data;
if (main_fc->sw_format != overlay_fc->sw_format) {
av_log(ctx, AV_LOG_ERROR, "Mismatching sw formats!\n");
return AVERROR(EINVAL);
}
s->overlay_w = input_overlay->width;
s->overlay_h = input_overlay->height;
RET(init_filter(ctx));
}
out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
if (!out) {
err = AVERROR(ENOMEM);
goto fail;
}
RET(ff_vk_filter_process_Nin(&s->vkctx, &s->e, &s->pl,
out, (AVFrame *[]){ input_main, input_overlay }, 2,
s->sampler, &s->opts, sizeof(s->opts)));
err = av_frame_copy_props(out, input_main);
if (err < 0)
goto fail;
return ff_filter_frame(outlink, out);
fail:
av_frame_free(&out);
return err;
}
static int overlay_vulkan_config_output(AVFilterLink *outlink)
{
int err;
AVFilterContext *avctx = outlink->src;
OverlayVulkanContext *s = avctx->priv;
err = ff_vk_filter_config_output(outlink);
if (err < 0)
return err;
err = ff_framesync_init_dualinput(&s->fs, avctx);
if (err < 0)
return err;
return ff_framesync_configure(&s->fs);
}
static int overlay_vulkan_activate(AVFilterContext *avctx)
{
OverlayVulkanContext *s = avctx->priv;
return ff_framesync_activate(&s->fs);
}
static av_cold int overlay_vulkan_init(AVFilterContext *avctx)
{
OverlayVulkanContext *s = avctx->priv;
s->fs.on_event = &overlay_vulkan_blend;
return ff_vk_filter_init(avctx);
}
static void overlay_vulkan_uninit(AVFilterContext *avctx)
{
OverlayVulkanContext *s = avctx->priv;
FFVulkanContext *vkctx = &s->vkctx;
FFVulkanFunctions *vk = &vkctx->vkfn;
ff_vk_exec_pool_free(vkctx, &s->e);
ff_vk_pipeline_free(vkctx, &s->pl);
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);
ff_framesync_uninit(&s->fs);
s->initialized = 0;
}
#define OFFSET(x) offsetof(OverlayVulkanContext, x)
#define FLAGS (AV_OPT_FLAG_FILTERING_PARAM | AV_OPT_FLAG_VIDEO_PARAM)
static const AVOption overlay_vulkan_options[] = {
{ "x", "Set horizontal offset", OFFSET(overlay_x), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, .flags = FLAGS },
{ "y", "Set vertical offset", OFFSET(overlay_y), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, .flags = FLAGS },
{ NULL },
};
AVFILTER_DEFINE_CLASS(overlay_vulkan);
static const AVFilterPad overlay_vulkan_inputs[] = {
{
.name = "main",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = &ff_vk_filter_config_input,
},
{
.name = "overlay",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = &ff_vk_filter_config_input,
},
};
static const AVFilterPad overlay_vulkan_outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = &overlay_vulkan_config_output,
},
};
const AVFilter ff_vf_overlay_vulkan = {
.name = "overlay_vulkan",
.description = NULL_IF_CONFIG_SMALL("Overlay a source on top of another"),
.priv_size = sizeof(OverlayVulkanContext),
.init = &overlay_vulkan_init,
.uninit = &overlay_vulkan_uninit,
.activate = &overlay_vulkan_activate,
FILTER_INPUTS(overlay_vulkan_inputs),
FILTER_OUTPUTS(overlay_vulkan_outputs),
FILTER_SINGLE_PIXFMT(AV_PIX_FMT_VULKAN),
.priv_class = &overlay_vulkan_class,
.flags_internal = FF_FILTER_FLAG_HWFRAME_AWARE,
.flags = AVFILTER_FLAG_HWDEVICE,
};
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