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Merge pull request #7431 from liushuyu/fix-linux-decoding

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video_core/codecs: fix multiple decoding issues on Linux
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bunnei 2021-11-26 15:38:40 -08:00 committed by GitHub
commit 157985f556
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 41 additions and 2 deletions
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43
src/video_core/command_classes/codecs/codec.cpp
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@ -2,6 +2,8 @@
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include <algorithm>
#include <cstdio>
#include <fstream>
#include <vector>
#include "common/assert.h"
@ -59,6 +61,34 @@ Codec::~Codec() {
av_buffer_unref(&av_gpu_decoder);
}
#ifdef LIBVA_FOUND
// List all the currently loaded Linux modules
static std::vector<std::string> ListLinuxKernelModules() {
using FILEPtr = std::unique_ptr<FILE, decltype(&std::fclose)>;
auto module_listing = FILEPtr{fopen("/proc/modules", "rt"), std::fclose};
std::vector<std::string> modules{};
if (!module_listing) {
LOG_WARNING(Service_NVDRV, "Could not open /proc/modules to collect available modules");
return modules;
}
char* buffer = nullptr;
size_t buf_len = 0;
while (getline(&buffer, &buf_len, module_listing.get()) != -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));
}
free(buffer);
return modules;
}
#endif
bool Codec::CreateGpuAvDevice() {
#if defined(LIBVA_FOUND)
static constexpr std::array<const char*, 3> VAAPI_DRIVERS = {
@ -67,8 +97,16 @@ bool Codec::CreateGpuAvDevice() {
"amdgpu",
};
AVDictionary* hwdevice_options = nullptr;
const auto loaded_modules = ListLinuxKernelModules();
av_dict_set(&hwdevice_options, "connection_type", "drm", 0);
for (const auto& driver : VAAPI_DRIVERS) {
// first check if the target driver is loaded in the kernel
bool found = std::any_of(loaded_modules.begin(), loaded_modules.end(),
[&driver](const auto& module) { return module == driver; });
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 +123,12 @@ 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) {