/*
* 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.h"
#include "internal.h"
#include "framesync.h"
#define CGROUPS (int [3]){ 32, 32, 1 }
typedef struct OverlayVulkanContext {
VulkanFilterContext vkctx;
int initialized;
VulkanPipeline *pl;
FFVkExecContext *exec;
FFFrameSync fs;
FFVkBuffer params_buf;
/* Shader updators, must be in the main filter struct */
VkDescriptorImageInfo main_images[3];
VkDescriptorImageInfo overlay_images[3];
VkDescriptorImageInfo output_images[3];
VkDescriptorBufferInfo params_desc;
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;
OverlayVulkanContext *s = ctx->priv;
VkSampler *sampler = ff_vk_init_sampler(ctx, 1, VK_FILTER_NEAREST);
if (!sampler)
return AVERROR_EXTERNAL;
s->pl = ff_vk_create_pipeline(ctx);
if (!s->pl)
return AVERROR(ENOMEM);
s->vkctx.queue_family_idx = s->vkctx.hwctx->queue_family_comp_index;
s->vkctx.queue_count = GET_QUEUE_COUNT(s->vkctx.hwctx, 0, 1, 0);
s->vkctx.cur_queue_idx = av_get_random_seed() % s->vkctx.queue_count;
{ /* Create the shader */
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;
VulkanDescriptorSetBinding desc_i[3] = {
{
.name = "main_img",
.type = VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER,
.dimensions = 2,
.elems = planes,
.stages = VK_SHADER_STAGE_COMPUTE_BIT,
.updater = s->main_images,
.samplers = DUP_SAMPLER_ARRAY4(*sampler),
},
{
.name = "overlay_img",
.type = VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER,
.dimensions = 2,
.elems = planes,
.stages = VK_SHADER_STAGE_COMPUTE_BIT,
.updater = s->overlay_images,
.samplers = DUP_SAMPLER_ARRAY4(*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,
.updater = s->output_images,
},
};
VulkanDescriptorSetBinding desc_b = {
.name = "params",
.type = VK_DESCRIPTOR_TYPE_STORAGE_BUFFER,
.mem_quali = "readonly",
.mem_layout = "std430",
.stages = VK_SHADER_STAGE_COMPUTE_BIT,
.updater = &s->params_desc,
.buf_content = "ivec2 o_offset[3], o_size[3];",
};
SPIRVShader *shd = ff_vk_init_shader(ctx, s->pl, "overlay_compute",
VK_SHADER_STAGE_COMPUTE_BIT);
if (!shd)
return AVERROR(ENOMEM);
ff_vk_set_compute_shader_sizes(ctx, shd, CGROUPS);
RET(ff_vk_add_descriptor_set(ctx, s->pl, shd, desc_i, 3, 0)); /* set 0 */
RET(ff_vk_add_descriptor_set(ctx, s->pl, shd, &desc_b, 1, 0)); /* set 1 */
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(ff_vk_compile_shader(ctx, shd, "main"));
}
RET(ff_vk_init_pipeline_layout(ctx, s->pl));
RET(ff_vk_init_compute_pipeline(ctx, s->pl));
{ /* Create and update buffer */
const AVPixFmtDescriptor *desc;
/* NOTE: std430 requires the same identical struct layout, padding and
* alignment as C, so we're allowed to do this, as this will map
* exactly to what the shader recieves */
struct {
int32_t o_offset[2*3];
int32_t o_size[2*3];
} *par;
err = ff_vk_create_buf(ctx, &s->params_buf,
sizeof(*par),
VK_BUFFER_USAGE_STORAGE_BUFFER_BIT,
VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT);
if (err)
return err;
err = ff_vk_map_buffers(ctx, &s->params_buf, (uint8_t **)&par, 1, 0);
if (err)
return err;
desc = av_pix_fmt_desc_get(s->vkctx.output_format);
par->o_offset[0] = s->overlay_x;
par->o_offset[1] = s->overlay_y;
par->o_offset[2] = par->o_offset[0] >> desc->log2_chroma_w;
par->o_offset[3] = par->o_offset[1] >> desc->log2_chroma_h;
par->o_offset[4] = par->o_offset[0] >> desc->log2_chroma_w;
par->o_offset[5] = par->o_offset[1] >> desc->log2_chroma_h;
par->o_size[0] = s->overlay_w;
par->o_size[1] = s->overlay_h;
par->o_size[2] = par->o_size[0] >> desc->log2_chroma_w;
par->o_size[3] = par->o_size[1] >> desc->log2_chroma_h;
par->o_size[4] = par->o_size[0] >> desc->log2_chroma_w;
par->o_size[5] = par->o_size[1] >> desc->log2_chroma_h;
err = ff_vk_unmap_buffers(ctx, &s->params_buf, 1, 1);
if (err)
return err;
s->params_desc.buffer = s->params_buf.buf;
s->params_desc.range = VK_WHOLE_SIZE;
ff_vk_update_descriptor_set(ctx, s->pl, 1);
}
/* Execution context */
RET(ff_vk_create_exec_ctx(ctx, &s->exec));
s->initialized = 1;
return 0;
fail:
return err;
}
static int process_frames(AVFilterContext *avctx, AVFrame *out_f,
AVFrame *main_f, AVFrame *overlay_f)
{
int err;
VkCommandBuffer cmd_buf;
OverlayVulkanContext *s = avctx->priv;
int planes = av_pix_fmt_count_planes(s->vkctx.output_format);
AVVkFrame *out = (AVVkFrame *)out_f->data[0];
AVVkFrame *main = (AVVkFrame *)main_f->data[0];
AVVkFrame *overlay = (AVVkFrame *)overlay_f->data[0];
AVHWFramesContext *main_fc = (AVHWFramesContext*)main_f->hw_frames_ctx->data;
AVHWFramesContext *overlay_fc = (AVHWFramesContext*)overlay_f->hw_frames_ctx->data;
/* Update descriptors and init the exec context */
ff_vk_start_exec_recording(avctx, s->exec);
cmd_buf = ff_vk_get_exec_buf(avctx, s->exec);
for (int i = 0; i < planes; i++) {
RET(ff_vk_create_imageview(avctx, s->exec, &s->main_images[i].imageView,
main->img[i],
av_vkfmt_from_pixfmt(main_fc->sw_format)[i],
ff_comp_identity_map));
RET(ff_vk_create_imageview(avctx, s->exec, &s->overlay_images[i].imageView,
overlay->img[i],
av_vkfmt_from_pixfmt(overlay_fc->sw_format)[i],
ff_comp_identity_map));
RET(ff_vk_create_imageview(avctx, s->exec, &s->output_images[i].imageView,
out->img[i],
av_vkfmt_from_pixfmt(s->vkctx.output_format)[i],
ff_comp_identity_map));
s->main_images[i].imageLayout = VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL;
s->overlay_images[i].imageLayout = VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL;
s->output_images[i].imageLayout = VK_IMAGE_LAYOUT_GENERAL;
}
ff_vk_update_descriptor_set(avctx, s->pl, 0);
for (int i = 0; i < planes; i++) {
VkImageMemoryBarrier bar[3] = {
{
.sType = VK_STRUCTURE_TYPE_IMAGE_MEMORY_BARRIER,
.srcAccessMask = 0,
.dstAccessMask = VK_ACCESS_SHADER_READ_BIT,
.oldLayout = main->layout[i],
.newLayout = s->main_images[i].imageLayout,
.srcQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED,
.dstQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED,
.image = main->img[i],
.subresourceRange.aspectMask = VK_IMAGE_ASPECT_COLOR_BIT,
.subresourceRange.levelCount = 1,
.subresourceRange.layerCount = 1,
},
{
.sType = VK_STRUCTURE_TYPE_IMAGE_MEMORY_BARRIER,
.srcAccessMask = 0,
.dstAccessMask = VK_ACCESS_SHADER_READ_BIT,
.oldLayout = overlay->layout[i],
.newLayout = s->overlay_images[i].imageLayout,
.srcQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED,
.dstQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED,
.image = overlay->img[i],
.subresourceRange.aspectMask = VK_IMAGE_ASPECT_COLOR_BIT,
.subresourceRange.levelCount = 1,
.subresourceRange.layerCount = 1,
},
{
.sType = VK_STRUCTURE_TYPE_IMAGE_MEMORY_BARRIER,
.srcAccessMask = 0,
.dstAccessMask = VK_ACCESS_SHADER_WRITE_BIT,
.oldLayout = out->layout[i],
.newLayout = s->output_images[i].imageLayout,
.srcQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED,
.dstQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED,
.image = out->img[i],
.subresourceRange.aspectMask = VK_IMAGE_ASPECT_COLOR_BIT,
.subresourceRange.levelCount = 1,
.subresourceRange.layerCount = 1,
},
};
vkCmdPipelineBarrier(cmd_buf, VK_PIPELINE_STAGE_TOP_OF_PIPE_BIT,
VK_PIPELINE_STAGE_COMPUTE_SHADER_BIT, 0,
0, NULL, 0, NULL, FF_ARRAY_ELEMS(bar), bar);
main->layout[i] = bar[0].newLayout;
main->access[i] = bar[0].dstAccessMask;
overlay->layout[i] = bar[1].newLayout;
overlay->access[i] = bar[1].dstAccessMask;
out->layout[i] = bar[2].newLayout;
out->access[i] = bar[2].dstAccessMask;
}
ff_vk_bind_pipeline_exec(avctx, s->exec, s->pl);
vkCmdDispatch(cmd_buf,
FFALIGN(s->vkctx.output_width, CGROUPS[0])/CGROUPS[0],
FFALIGN(s->vkctx.output_height, CGROUPS[1])/CGROUPS[1], 1);
ff_vk_add_exec_dep(avctx, s->exec, main_f, VK_PIPELINE_STAGE_TOP_OF_PIPE_BIT);
ff_vk_add_exec_dep(avctx, s->exec, overlay_f, VK_PIPELINE_STAGE_TOP_OF_PIPE_BIT);
ff_vk_add_exec_dep(avctx, s->exec, out_f, VK_PIPELINE_STAGE_TOP_OF_PIPE_BIT);
err = ff_vk_submit_exec_queue(avctx, s->exec);
if (err)
return err;
return err;
fail:
ff_vk_discard_exec_deps(avctx, s->exec);
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(process_frames(ctx, out, input_main, input_overlay));
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;
ff_vk_filter_uninit(avctx);
ff_framesync_uninit(&s->fs);
ff_vk_free_buf(avctx, &s->params_buf);
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,
},
{ NULL }
};
static const AVFilterPad overlay_vulkan_outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = &overlay_vulkan_config_output,
},
{ NULL }
};
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,
.query_formats = &ff_vk_filter_query_formats,
.activate = &overlay_vulkan_activate,
.inputs = overlay_vulkan_inputs,
.outputs = overlay_vulkan_outputs,
.priv_class = &overlay_vulkan_class,
.flags_internal = FF_FILTER_FLAG_HWFRAME_AWARE,
};