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348 lines
12 KiB
348 lines
12 KiB
/* |
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* Copyright (c) Lynne |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#include "libavutil/random_seed.h" |
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#include "libavutil/opt.h" |
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#include "vulkan_filter.h" |
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#include "vulkan_spirv.h" |
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#include "filters.h" |
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#include "framesync.h" |
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#include "video.h" |
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typedef struct OverlayVulkanContext { |
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FFVulkanContext vkctx; |
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FFFrameSync fs; |
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int initialized; |
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FFVulkanPipeline pl; |
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FFVkExecPool e; |
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FFVkQueueFamilyCtx qf; |
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FFVkSPIRVShader shd; |
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VkSampler sampler; |
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/* Push constants / options */ |
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struct { |
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int32_t o_offset[2*3]; |
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int32_t o_size[2*3]; |
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} opts; |
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int overlay_x; |
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int overlay_y; |
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int overlay_w; |
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int overlay_h; |
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} OverlayVulkanContext; |
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static const char overlay_noalpha[] = { |
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C(0, void overlay_noalpha(int i, ivec2 pos) ) |
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C(0, { ) |
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C(1, if ((o_offset[i].x <= pos.x) && (o_offset[i].y <= pos.y) && |
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(pos.x < (o_offset[i].x + o_size[i].x)) && |
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(pos.y < (o_offset[i].y + o_size[i].y))) { ) |
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C(2, vec4 res = texture(overlay_img[i], pos - o_offset[i]); ) |
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C(2, imageStore(output_img[i], pos, res); ) |
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C(1, } else { ) |
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C(2, vec4 res = texture(main_img[i], pos); ) |
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C(2, imageStore(output_img[i], pos, res); ) |
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C(1, } ) |
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C(0, } ) |
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}; |
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static const char overlay_alpha[] = { |
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C(0, void overlay_alpha_opaque(int i, ivec2 pos) ) |
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C(0, { ) |
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C(1, vec4 res = texture(main_img[i], pos); ) |
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C(1, if ((o_offset[i].x <= pos.x) && (o_offset[i].y <= pos.y) && |
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(pos.x < (o_offset[i].x + o_size[i].x)) && |
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(pos.y < (o_offset[i].y + o_size[i].y))) { ) |
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C(2, vec4 ovr = texture(overlay_img[i], pos - o_offset[i]); ) |
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C(2, res = ovr * ovr.a + res * (1.0f - ovr.a); ) |
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C(2, res.a = 1.0f; ) |
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C(2, imageStore(output_img[i], pos, res); ) |
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C(1, } ) |
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C(1, imageStore(output_img[i], pos, res); ) |
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C(0, } ) |
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}; |
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static av_cold int init_filter(AVFilterContext *ctx) |
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{ |
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int err; |
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uint8_t *spv_data; |
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size_t spv_len; |
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void *spv_opaque = NULL; |
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OverlayVulkanContext *s = ctx->priv; |
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FFVulkanContext *vkctx = &s->vkctx; |
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const int planes = av_pix_fmt_count_planes(s->vkctx.output_format); |
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const int ialpha = av_pix_fmt_desc_get(s->vkctx.input_format)->flags & AV_PIX_FMT_FLAG_ALPHA; |
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const AVPixFmtDescriptor *pix_desc = av_pix_fmt_desc_get(s->vkctx.output_format); |
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FFVkSPIRVShader *shd = &s->shd; |
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FFVkSPIRVCompiler *spv; |
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FFVulkanDescriptorSetBinding *desc; |
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spv = ff_vk_spirv_init(); |
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if (!spv) { |
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av_log(ctx, AV_LOG_ERROR, "Unable to initialize SPIR-V compiler!\n"); |
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return AVERROR_EXTERNAL; |
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} |
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ff_vk_qf_init(vkctx, &s->qf, VK_QUEUE_COMPUTE_BIT); |
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RET(ff_vk_exec_pool_init(vkctx, &s->qf, &s->e, s->qf.nb_queues*4, 0, 0, 0, NULL)); |
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RET(ff_vk_init_sampler(vkctx, &s->sampler, 1, VK_FILTER_NEAREST)); |
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RET(ff_vk_shader_init(&s->pl, &s->shd, "overlay_compute", |
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VK_SHADER_STAGE_COMPUTE_BIT, 0)); |
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ff_vk_shader_set_compute_sizes(&s->shd, 32, 32, 1); |
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GLSLC(0, layout(push_constant, std430) uniform pushConstants { ); |
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GLSLC(1, ivec2 o_offset[3]; ); |
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GLSLC(1, ivec2 o_size[3]; ); |
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GLSLC(0, }; ); |
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GLSLC(0, ); |
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ff_vk_add_push_constant(&s->pl, 0, sizeof(s->opts), |
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VK_SHADER_STAGE_COMPUTE_BIT); |
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desc = (FFVulkanDescriptorSetBinding []) { |
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{ |
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.name = "main_img", |
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.type = VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, |
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.dimensions = 2, |
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.elems = planes, |
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.stages = VK_SHADER_STAGE_COMPUTE_BIT, |
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.samplers = DUP_SAMPLER(s->sampler), |
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}, |
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{ |
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.name = "overlay_img", |
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.type = VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, |
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.dimensions = 2, |
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.elems = planes, |
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.stages = VK_SHADER_STAGE_COMPUTE_BIT, |
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.samplers = DUP_SAMPLER(s->sampler), |
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}, |
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{ |
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.name = "output_img", |
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.type = VK_DESCRIPTOR_TYPE_STORAGE_IMAGE, |
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.mem_layout = ff_vk_shader_rep_fmt(s->vkctx.output_format), |
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.mem_quali = "writeonly", |
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.dimensions = 2, |
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.elems = planes, |
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.stages = VK_SHADER_STAGE_COMPUTE_BIT, |
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}, |
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}; |
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RET(ff_vk_pipeline_descriptor_set_add(vkctx, &s->pl, shd, desc, 3, 0, 0)); |
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GLSLD( overlay_noalpha ); |
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GLSLD( overlay_alpha ); |
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GLSLC(0, void main() ); |
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GLSLC(0, { ); |
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GLSLC(1, ivec2 pos = ivec2(gl_GlobalInvocationID.xy); ); |
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GLSLF(1, int planes = %i; ,planes); |
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GLSLC(1, for (int i = 0; i < planes; i++) { ); |
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if (ialpha) |
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GLSLC(2, overlay_alpha_opaque(i, pos); ); |
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else |
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GLSLC(2, overlay_noalpha(i, pos); ); |
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GLSLC(1, } ); |
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GLSLC(0, } ); |
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RET(spv->compile_shader(spv, ctx, shd, &spv_data, &spv_len, "main", |
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&spv_opaque)); |
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RET(ff_vk_shader_create(vkctx, shd, spv_data, spv_len, "main")); |
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RET(ff_vk_init_compute_pipeline(vkctx, &s->pl, shd)); |
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RET(ff_vk_exec_pipeline_register(vkctx, &s->e, &s->pl)); |
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s->opts.o_offset[0] = s->overlay_x; |
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s->opts.o_offset[1] = s->overlay_y; |
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s->opts.o_offset[2] = s->opts.o_offset[0] >> pix_desc->log2_chroma_w; |
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s->opts.o_offset[3] = s->opts.o_offset[1] >> pix_desc->log2_chroma_h; |
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s->opts.o_offset[4] = s->opts.o_offset[0] >> pix_desc->log2_chroma_w; |
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s->opts.o_offset[5] = s->opts.o_offset[1] >> pix_desc->log2_chroma_h; |
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s->opts.o_size[0] = s->overlay_w; |
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s->opts.o_size[1] = s->overlay_h; |
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s->opts.o_size[2] = s->opts.o_size[0] >> pix_desc->log2_chroma_w; |
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s->opts.o_size[3] = s->opts.o_size[1] >> pix_desc->log2_chroma_h; |
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s->opts.o_size[4] = s->opts.o_size[0] >> pix_desc->log2_chroma_w; |
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s->opts.o_size[5] = s->opts.o_size[1] >> pix_desc->log2_chroma_h; |
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s->initialized = 1; |
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fail: |
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if (spv_opaque) |
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spv->free_shader(spv, &spv_opaque); |
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if (spv) |
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spv->uninit(&spv); |
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return err; |
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} |
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static int overlay_vulkan_blend(FFFrameSync *fs) |
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{ |
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int err; |
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AVFilterContext *ctx = fs->parent; |
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OverlayVulkanContext *s = ctx->priv; |
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AVFilterLink *outlink = ctx->outputs[0]; |
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AVFrame *input_main, *input_overlay, *out; |
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err = ff_framesync_get_frame(fs, 0, &input_main, 0); |
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if (err < 0) |
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goto fail; |
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err = ff_framesync_get_frame(fs, 1, &input_overlay, 0); |
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if (err < 0) |
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goto fail; |
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if (!input_main || !input_overlay) |
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return 0; |
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if (!s->initialized) { |
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AVHWFramesContext *main_fc = (AVHWFramesContext*)input_main->hw_frames_ctx->data; |
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AVHWFramesContext *overlay_fc = (AVHWFramesContext*)input_overlay->hw_frames_ctx->data; |
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if (main_fc->sw_format != overlay_fc->sw_format) { |
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av_log(ctx, AV_LOG_ERROR, "Mismatching sw formats!\n"); |
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return AVERROR(EINVAL); |
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} |
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s->overlay_w = input_overlay->width; |
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s->overlay_h = input_overlay->height; |
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RET(init_filter(ctx)); |
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} |
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out = ff_get_video_buffer(outlink, outlink->w, outlink->h); |
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if (!out) { |
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err = AVERROR(ENOMEM); |
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goto fail; |
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} |
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RET(ff_vk_filter_process_Nin(&s->vkctx, &s->e, &s->pl, |
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out, (AVFrame *[]){ input_main, input_overlay }, 2, |
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s->sampler, &s->opts, sizeof(s->opts))); |
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err = av_frame_copy_props(out, input_main); |
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if (err < 0) |
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goto fail; |
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return ff_filter_frame(outlink, out); |
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fail: |
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av_frame_free(&out); |
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return err; |
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} |
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static int overlay_vulkan_config_output(AVFilterLink *outlink) |
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{ |
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int err; |
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AVFilterContext *avctx = outlink->src; |
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OverlayVulkanContext *s = avctx->priv; |
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err = ff_vk_filter_config_output(outlink); |
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if (err < 0) |
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return err; |
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err = ff_framesync_init_dualinput(&s->fs, avctx); |
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if (err < 0) |
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return err; |
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return ff_framesync_configure(&s->fs); |
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} |
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static int overlay_vulkan_activate(AVFilterContext *avctx) |
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{ |
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OverlayVulkanContext *s = avctx->priv; |
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return ff_framesync_activate(&s->fs); |
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} |
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static av_cold int overlay_vulkan_init(AVFilterContext *avctx) |
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{ |
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OverlayVulkanContext *s = avctx->priv; |
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s->fs.on_event = &overlay_vulkan_blend; |
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return ff_vk_filter_init(avctx); |
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} |
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static void overlay_vulkan_uninit(AVFilterContext *avctx) |
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{ |
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OverlayVulkanContext *s = avctx->priv; |
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FFVulkanContext *vkctx = &s->vkctx; |
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FFVulkanFunctions *vk = &vkctx->vkfn; |
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ff_vk_exec_pool_free(vkctx, &s->e); |
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ff_vk_pipeline_free(vkctx, &s->pl); |
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ff_vk_shader_free(vkctx, &s->shd); |
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if (s->sampler) |
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vk->DestroySampler(vkctx->hwctx->act_dev, s->sampler, |
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vkctx->hwctx->alloc); |
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ff_vk_uninit(&s->vkctx); |
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ff_framesync_uninit(&s->fs); |
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s->initialized = 0; |
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} |
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#define OFFSET(x) offsetof(OverlayVulkanContext, x) |
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#define FLAGS (AV_OPT_FLAG_FILTERING_PARAM | AV_OPT_FLAG_VIDEO_PARAM) |
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static const AVOption overlay_vulkan_options[] = { |
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{ "x", "Set horizontal offset", OFFSET(overlay_x), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, .flags = FLAGS }, |
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{ "y", "Set vertical offset", OFFSET(overlay_y), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, .flags = FLAGS }, |
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{ NULL }, |
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}; |
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AVFILTER_DEFINE_CLASS(overlay_vulkan); |
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static const AVFilterPad overlay_vulkan_inputs[] = { |
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{ |
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.name = "main", |
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.type = AVMEDIA_TYPE_VIDEO, |
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.config_props = &ff_vk_filter_config_input, |
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}, |
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{ |
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.name = "overlay", |
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.type = AVMEDIA_TYPE_VIDEO, |
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.config_props = &ff_vk_filter_config_input, |
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}, |
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}; |
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static const AVFilterPad overlay_vulkan_outputs[] = { |
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{ |
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.name = "default", |
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.type = AVMEDIA_TYPE_VIDEO, |
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.config_props = &overlay_vulkan_config_output, |
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}, |
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}; |
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const AVFilter ff_vf_overlay_vulkan = { |
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.name = "overlay_vulkan", |
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.description = NULL_IF_CONFIG_SMALL("Overlay a source on top of another"), |
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.priv_size = sizeof(OverlayVulkanContext), |
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.init = &overlay_vulkan_init, |
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.uninit = &overlay_vulkan_uninit, |
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.activate = &overlay_vulkan_activate, |
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FILTER_INPUTS(overlay_vulkan_inputs), |
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FILTER_OUTPUTS(overlay_vulkan_outputs), |
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FILTER_SINGLE_PIXFMT(AV_PIX_FMT_VULKAN), |
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.priv_class = &overlay_vulkan_class, |
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.flags_internal = FF_FILTER_FLAG_HWFRAME_AWARE, |
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.flags = AVFILTER_FLAG_HWDEVICE, |
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};
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