apps/ffmpeg-rockchip
1
0
Fork 0
mirror of https://github.com/nyanmisaka/ffmpeg-rockchip.git synced 2025-10-28 03:13:08 +08:00
Code Issues Packages Projects Releases Wiki Activity

hwcontext_vulkan: dlopen libvulkan

Browse Source 
While Vulkan itself went more or less the way it was expected to go,
libvulkan didn't quite solve all of the opengl loader issues. It's multi-vendor,
yes, but unfortunately, the code is Google/Khronos QUALITY, so suffers from
big static linking issues (static linking on anything but OSX is unsupported),
has bugs, and due to the prefix system used, there are 3 or so ways to type out
functions.

Just solve all of those problems by dlopening it. We even have nice emulation
for it on Windows.
This commit is contained in:
Lynne
2021-04-29 03:37:42 +02:00
parent 4a6581e968
commit cf17e2323f
2 changed files with 80 additions and 5 deletions
Download Patch File Download Diff File Expand all files Collapse all files

51
libavutil/hwcontext_vulkan.c
View File

@@ -26,8 +26,11 @@
#include "hwcontext_internal.h"
#include "hwcontext_vulkan.h"
VKAPI_ATTR PFN_vkVoidFunction VKAPI_CALL vkGetInstanceProcAddr(VkInstance instance,
const char *name);
#ifdef _WIN32
#include "compat/w32dlfcn.h"
#else
#include <dlfcn.h>
#endif
#if CONFIG_LIBDRM
#include <unistd.h>
@@ -186,7 +189,8 @@ typedef struct VulkanExecCtx {
} VulkanExecCtx;
typedef struct VulkanDevicePriv {
/* Vulkan loader functions */
/* Vulkan library and loader functions */
void *libvulkan;
VulkanFunctions vkfn;
/* Properties */
@@ -369,6 +373,40 @@ static int pixfmt_is_supported(AVHWDeviceContext *dev_ctx, enum AVPixelFormat p,
return 1;
}
static int load_libvulkan(AVHWDeviceContext *ctx)
{
AVVulkanDeviceContext *hwctx = ctx->hwctx;
VulkanDevicePriv *p = ctx->internal->priv;
static const char *lib_names[] = {
#if defined(_WIN32)
"vulkan-1.dll",
#elif defined(__APPLE__)
"libvulkan.dylib",
"libvulkan.1.dylib",
"libMoltenVK.dylib",
#else
"libvulkan.so.1",
"libvulkan.so",
#endif
};
for (int i = 0; i < FF_ARRAY_ELEMS(lib_names); i++) {
p->libvulkan = dlopen(lib_names[i], RTLD_NOW | RTLD_LOCAL);
if (p->libvulkan)
break;
}
if (!p->libvulkan) {
av_log(ctx, AV_LOG_ERROR, "Unable to open the libvulkan library!\n");
return AVERROR_UNKNOWN;
}
hwctx->get_proc_addr = (PFN_vkGetInstanceProcAddr)dlsym(p->libvulkan, "vkGetInstanceProcAddr");
return 0;
}
static int load_functions(AVHWDeviceContext *ctx, int has_inst, int has_dev)
{
AVVulkanDeviceContext *hwctx = ctx->hwctx;
@@ -649,7 +687,9 @@ static int create_instance(AVHWDeviceContext *ctx, AVDictionary *opts)
};
if (!hwctx->get_proc_addr) {
hwctx->get_proc_addr = vkGetInstanceProcAddr;
err = load_libvulkan(ctx);
if (err < 0)
return err;
}
err = load_functions(ctx, 0, 0);
@@ -1188,6 +1228,9 @@ static void vulkan_device_free(AVHWDeviceContext *ctx)
vk->DestroyInstance(hwctx->inst, hwctx->alloc);
if (p->libvulkan)
dlclose(p->libvulkan);
for (int i = 0; i < hwctx->nb_enabled_inst_extensions; i++)
av_free((void *)hwctx->enabled_inst_extensions[i]);
av_free((void *)hwctx->enabled_inst_extensions);