Function alloc_bind_mem

libavutil/hwcontext_vulkan.c:2448–2515

}

static int alloc_bind_mem(AVHWFramesContext *hwfc, AVVkFrame *f,
                          void *alloc_pnext, size_t alloc_pnext_stride)
{
    int img_cnt = 0, err;
    VkResult ret;
    AVHWDeviceContext *ctx = hwfc->device_ctx;
    VulkanDevicePriv *p = ctx->hwctx;
    AVVulkanDeviceContext *hwctx = &p->p;
    FFVulkanFunctions *vk = &p->vkctx.vkfn;
    VkBindImageMemoryInfo bind_info[AV_NUM_DATA_POINTERS] = { { 0 } };

    while (f->img[img_cnt]) {
        int use_ded_mem;
        VkImageMemoryRequirementsInfo2 req_desc = {
            .sType = VK_STRUCTURE_TYPE_IMAGE_MEMORY_REQUIREMENTS_INFO_2,
            .image = f->img[img_cnt],
        };
        VkMemoryDedicatedAllocateInfo ded_alloc = {
            .sType = VK_STRUCTURE_TYPE_MEMORY_DEDICATED_ALLOCATE_INFO,
            .pNext = (void *)(((uint8_t *)alloc_pnext) + img_cnt*alloc_pnext_stride),
        };
        VkMemoryDedicatedRequirements ded_req = {
            .sType = VK_STRUCTURE_TYPE_MEMORY_DEDICATED_REQUIREMENTS,
        };
        VkMemoryRequirements2 req = {
            .sType = VK_STRUCTURE_TYPE_MEMORY_REQUIREMENTS_2,
            .pNext = &ded_req,
        };

        vk->GetImageMemoryRequirements2(hwctx->act_dev, &req_desc, &req);

        if (f->tiling == VK_IMAGE_TILING_LINEAR)
            req.memoryRequirements.size = FFALIGN(req.memoryRequirements.size,
                                                  p->props.properties.limits.minMemoryMapAlignment);

        /* In case the implementation prefers/requires dedicated allocation */
        use_ded_mem = ded_req.prefersDedicatedAllocation |
                      ded_req.requiresDedicatedAllocation;
        if (use_ded_mem)
            ded_alloc.image = f->img[img_cnt];

        /* Allocate memory */
        if ((err = alloc_mem(ctx, &req.memoryRequirements,
                             f->tiling == VK_IMAGE_TILING_LINEAR ?
                             VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT :
                             VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT,
                             use_ded_mem ? &ded_alloc : (void *)ded_alloc.pNext,
                             &f->flags, &f->mem[img_cnt])))
            return err;

        f->size[img_cnt] = req.memoryRequirements.size;
        bind_info[img_cnt].sType  = VK_STRUCTURE_TYPE_BIND_IMAGE_MEMORY_INFO;
        bind_info[img_cnt].image  = f->img[img_cnt];
        bind_info[img_cnt].memory = f->mem[img_cnt];

        img_cnt++;
    }