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Merge pull request #7467 from liushuyu/fix-linux-decoding 

video_core/codecs: more robust ffmpeg hwdecoder selection logic
This commit is contained in:
bunnei 2021-12-03 17:11:12 -08:00 committed by GitHub
parent a2fb5a13b2 e7f10de11a
commit e482dd82b9
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GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 50 additions and 66 deletions
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1
src/video_core/CMakeLists.txt
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@ -3,6 +3,7 @@ add_subdirectory(host_shaders)
if(LIBVA_FOUND)
set_source_files_properties(command_classes/codecs/codec.cpp
PROPERTIES COMPILE_DEFINITIONS LIBVA_FOUND=1)
list(APPEND FFmpeg_LIBRARIES ${LIBVA_LIBRARIES})
endif()
add_library(video_core STATIC

115
src/video_core/command_classes/codecs/codec.cpp
View File

@ -17,12 +17,28 @@
extern "C" {
#include <libavutil/opt.h>
#ifdef LIBVA_FOUND
// for querying VAAPI driver information
#include <libavutil/hwcontext_vaapi.h>
#endif
}
namespace Tegra {
namespace {
constexpr AVPixelFormat PREFERRED_GPU_FMT = AV_PIX_FMT_NV12;
constexpr AVPixelFormat PREFERRED_CPU_FMT = AV_PIX_FMT_YUV420P;
constexpr std::array PREFERRED_GPU_DECODERS = {
AV_HWDEVICE_TYPE_CUDA,
#ifdef _WIN32
AV_HWDEVICE_TYPE_D3D11VA,
AV_HWDEVICE_TYPE_DXVA2,
#elif defined(__linux__)
AV_HWDEVICE_TYPE_VAAPI,
AV_HWDEVICE_TYPE_VDPAU,
#endif
// last resort for Linux Flatpak (w/ NVIDIA)
AV_HWDEVICE_TYPE_VULKAN,
};
void AVPacketDeleter(AVPacket* ptr) {
av_packet_free(&ptr);
@ -61,83 +77,50 @@ 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;
// List all the currently available hwcontext in ffmpeg
static std::vector<AVHWDeviceType> ListSupportedContexts() {
std::vector<AVHWDeviceType> contexts{};
AVHWDeviceType current_device_type = AV_HWDEVICE_TYPE_NONE;
do {
current_device_type = av_hwdevice_iterate_types(current_device_type);
contexts.push_back(current_device_type);
} while (current_device_type != AV_HWDEVICE_TYPE_NONE);
return contexts;
}
#endif
bool Codec::CreateGpuAvDevice() {
#if defined(LIBVA_FOUND)
static constexpr std::array<const char*, 3> VAAPI_DRIVERS = {
"i915",
"iHD",
"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);
static constexpr auto HW_CONFIG_METHOD = AV_CODEC_HW_CONFIG_METHOD_HW_DEVICE_CTX;
static const auto supported_contexts = ListSupportedContexts();
for (const auto& type : PREFERRED_GPU_DECODERS) {
if (std::none_of(supported_contexts.begin(), supported_contexts.end(),
[&type](const auto& context) { return context == type; })) {
LOG_DEBUG(Service_NVDRV, "{} explicitly unsupported", av_hwdevice_get_type_name(type));
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);
if (hwdevice_error >= 0) {
LOG_INFO(Service_NVDRV, "Using VA-API with {}", driver);
av_dict_free(&hwdevice_options);
av_codec_ctx->pix_fmt = AV_PIX_FMT_VAAPI;
return true;
}
LOG_DEBUG(Service_NVDRV, "VA-API av_hwdevice_ctx_create failed {}", hwdevice_error);
}
LOG_DEBUG(Service_NVDRV, "VA-API av_hwdevice_ctx_create failed for all drivers");
av_dict_free(&hwdevice_options);
#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,
#endif
};
for (const auto& type : GPU_DECODER_TYPES) {
const int hwdevice_res = av_hwdevice_ctx_create(&av_gpu_decoder, type, nullptr, nullptr, 0);
if (hwdevice_res < 0) {
LOG_DEBUG(Service_NVDRV, "{} av_hwdevice_ctx_create failed {}",
av_hwdevice_get_type_name(type), hwdevice_res);
continue;
}
#ifdef LIBVA_FOUND
if (type == AV_HWDEVICE_TYPE_VAAPI) {
// we need to determine if this is an impersonated VAAPI driver
AVHWDeviceContext* hwctx =
static_cast<AVHWDeviceContext*>(static_cast<void*>(av_gpu_decoder->data));
AVVAAPIDeviceContext* vactx = static_cast<AVVAAPIDeviceContext*>(hwctx->hwctx);
const char* vendor_name = vaQueryVendorString(vactx->display);
if (strstr(vendor_name, "VDPAU backend")) {
// VDPAU impersonated VAAPI impl's are super buggy, we need to skip them
LOG_DEBUG(Service_NVDRV, "Skipping vdapu impersonated VAAPI driver");
continue;
} else {
// according to some user testing, certain vaapi driver (Intel?) could be buggy
// so let's log the driver name which may help the developers/supporters
LOG_DEBUG(Service_NVDRV, "Using VAAPI driver: {}", vendor_name);
}
}
#endif
for (int i = 0;; i++) {
const AVCodecHWConfig* config = avcodec_get_hw_config(av_codec, i);
if (!config) {