From 72aa418b0b412855683633d2799da1eb190ab6d5 Mon Sep 17 00:00:00 2001
From: liushuyu <liushuyu011@gmail.com>
Date: Wed, 24 Nov 2021 17:23:57 -0700
Subject: [PATCH] video_core/codecs: fix multiple decoding issues on Linux ...
* when someone installed Intel video drivers on an AMD system, the
decoder will select the Intel VA-API decoding driver and yuzu will
crash due to incorrect driver selection; the fix will check if the
currently about-to-use driver is loaded in the kernel
* when using NVIDIA driver on Linux with a ffmpeg that does not have
CUDA capability enabled, the decoder will crash; the fix simply
making the decoder prefers the VDPAU driver over CUDA on Linux
---
.../command_classes/codecs/codec.cpp | 49 ++++++++++++++++++-
1 file changed, 47 insertions(+), 2 deletions(-)
diff --git a/src/video_core/command_classes/codecs/codec.cpp b/src/video_core/command_classes/codecs/codec.cpp
index 9162778119..403ce30fe4 100644
--- a/src/video_core/command_classes/codecs/codec.cpp
+++ b/src/video_core/command_classes/codecs/codec.cpp
@@ -2,6 +2,7 @@
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
+#include <cstdio>
#include <fstream>
#include <vector>
#include "common/assert.h"
@@ -59,6 +60,36 @@ Codec::~Codec() {
av_buffer_unref(&av_gpu_decoder);
}
+#ifdef LIBVA_FOUND
+// List all the currently loaded Linux modules
+static std::vector<std::string> ListLinuxKernelModules() {
+ std::vector<std::string> modules{};
+ auto module_listing = fopen("/proc/modules", "rt");
+ char* buffer = nullptr;
+ size_t buf_len = 0;
+ if (!module_listing) {
+ LOG_WARNING(Service_NVDRV, "Could not open /proc/modules to collect available modules");
+ return modules;
+ }
+ while (getline(&buffer, &buf_len, module_listing) != -1) {
+ // format for the module listing file (sysfs)
+ // <name> <module_size> <depended_by_count> <depended_by_names> <status> <load_address>
+ auto line = std::string(buffer);
+ // we are only interested in module names
+ auto name_pos = line.find_first_of(" ");
+ if (name_pos == std::string::npos) {
+ continue;
+ }
+ modules.push_back(line.erase(name_pos + 1));
+ }
+ if (buffer) {
+ free(buffer);
+ }
+ fclose(module_listing);
+ return modules;
+}
+#endif
+
bool Codec::CreateGpuAvDevice() {
#if defined(LIBVA_FOUND)
static constexpr std::array<const char*, 3> VAAPI_DRIVERS = {
@@ -67,8 +98,21 @@ bool Codec::CreateGpuAvDevice() {
"amdgpu",
};
AVDictionary* hwdevice_options = nullptr;
+ auto loaded_modules = ListLinuxKernelModules();
av_dict_set(&hwdevice_options, "connection_type", "drm", 0);
for (const auto& driver : VAAPI_DRIVERS) {
+ bool found = false;
+ // first check if the target driver is loaded in the kernel
+ for (const auto& module : loaded_modules) {
+ if (module == driver) {
+ found = true;
+ break;
+ }
+ }
+ if (!found) {
+ LOG_DEBUG(Service_NVDRV, "Kernel driver {} is not loaded, trying the next one", driver);
+ continue;
+ }
av_dict_set(&hwdevice_options, "kernel_driver", driver, 0);
const int hwdevice_error = av_hwdevice_ctx_create(&av_gpu_decoder, AV_HWDEVICE_TYPE_VAAPI,
nullptr, hwdevice_options, 0);
@@ -85,11 +129,12 @@ bool Codec::CreateGpuAvDevice() {
#endif
static constexpr auto HW_CONFIG_METHOD = AV_CODEC_HW_CONFIG_METHOD_HW_DEVICE_CTX;
static constexpr std::array GPU_DECODER_TYPES{
+#ifdef linux
+ AV_HWDEVICE_TYPE_VDPAU,
+#endif
AV_HWDEVICE_TYPE_CUDA,
#ifdef _WIN32
AV_HWDEVICE_TYPE_D3D11VA,
-#else
- AV_HWDEVICE_TYPE_VDPAU,
#endif
};
for (const auto& type : GPU_DECODER_TYPES) {