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/*
* 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
*/
#ifndef AVUTIL_VULKAN_LOADER_H
#define AVUTIL_VULKAN_LOADER_H
#include "vulkan_functions.h"
/* Macro to turn a function name into a loader struct */
#define PFN_LOAD_INFO(req_inst, req_dev, ext_flag, name) \
{ \
req_inst, \
req_dev, \
offsetof(FFVulkanFunctions, name), \
ext_flag, \
{ "vk"#name, "vk"#name"EXT", "vk"#name"KHR" } \
},
static inline uint64_t ff_vk_extensions_to_mask(const char * const *extensions,
int nb_extensions)
{
static const struct ExtensionMap {
const char *name;
FFVulkanExtensions flag;
} extension_map[] = {
{ VK_EXT_EXTERNAL_MEMORY_DMA_BUF_EXTENSION_NAME, FF_VK_EXT_EXTERNAL_DMABUF_MEMORY },
{ VK_EXT_IMAGE_DRM_FORMAT_MODIFIER_EXTENSION_NAME, FF_VK_EXT_DRM_MODIFIER_FLAGS },
{ VK_KHR_EXTERNAL_MEMORY_FD_EXTENSION_NAME, FF_VK_EXT_EXTERNAL_FD_MEMORY },
{ VK_KHR_EXTERNAL_SEMAPHORE_FD_EXTENSION_NAME, FF_VK_EXT_EXTERNAL_FD_SEM },
{ VK_EXT_EXTERNAL_MEMORY_HOST_EXTENSION_NAME, FF_VK_EXT_EXTERNAL_HOST_MEMORY },
{ VK_EXT_DEBUG_UTILS_EXTENSION_NAME, FF_VK_EXT_DEBUG_UTILS }
};
FFVulkanExtensions mask = 0x0;
for (int i = 0; i < nb_extensions; i++) {
for (int j = 0; j < FF_ARRAY_ELEMS(extension_map); j++) {
if (!strcmp(extensions[i], extension_map[j].name)) {
mask |= extension_map[j].flag;
continue;
}
}
}
return mask;
}
/**
* Function loader.
* Vulkan function from scratch loading happens in 3 stages - the first one
* is before any initialization has happened, and you have neither an instance
* structure nor a device structure. At this stage, you can only get the bare
* minimals to initialize an instance.
* The second stage is when you have an instance. At this stage, you can
* initialize a VkDevice, and have an idea of what extensions each device
* supports.
* Finally, in the third stage, you can proceed and load all core functions,
* plus you can be sure that any extensions you've enabled during device
* initialization will be available.
*/
static inline int ff_vk_load_functions(AVHWDeviceContext *ctx,
FFVulkanFunctions *vk,
uint64_t extensions_mask,
int has_inst, int has_dev)
{
AVVulkanDeviceContext *hwctx = ctx->hwctx;
static const struct FunctionLoadInfo {
int req_inst;
int req_dev;
size_t struct_offset;
FFVulkanExtensions ext_flag;
const char *names[3];
} vk_load_info[] = {
FN_LIST(PFN_LOAD_INFO)
};
for (int i = 0; i < FF_ARRAY_ELEMS(vk_load_info); i++) {
const struct FunctionLoadInfo *load = &vk_load_info[i];
PFN_vkVoidFunction fn;
if (load->req_dev && !has_dev)
continue;
if (load->req_inst && !has_inst)
continue;
for (int j = 0; j < FF_ARRAY_ELEMS(load->names); j++) {
const char *name = load->names[j];
if (load->req_dev)
fn = vk->GetDeviceProcAddr(hwctx->act_dev, name);
else if (load->req_inst)
fn = hwctx->get_proc_addr(hwctx->inst, name);
else
fn = hwctx->get_proc_addr(NULL, name);
if (fn)
break;
}
if (!fn && ((extensions_mask &~ FF_VK_EXT_NO_FLAG) & load->ext_flag)) {
av_log(ctx, AV_LOG_ERROR, "Loader error, function \"%s\" indicated"
"as supported, but got NULL function pointer!\n", load->names[0]);
return AVERROR_EXTERNAL;
}
*(PFN_vkVoidFunction *)((uint8_t *)vk + load->struct_offset) = fn;
}
return 0;
}
#endif /* AVUTIL_VULKAN_LOADER_H */
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