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Merge pull request #6846 from ameerj/nvdec-gpu-decode

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nvdec: Add GPU video decoding for all capable drivers and platforms
This commit is contained in:
Fernando S 2021-09-11 23:11:32 +02:00 • committed by GitHub
commit be4e192903
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GPG key ID: 4AEE18F83AFDEB23
16 changed files with 337 additions and 135 deletions
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1
src/video_core/CMakeLists.txt
View file

@ -231,6 +231,7 @@ endif()
target_include_directories(video_core PRIVATE ${FFmpeg_INCLUDE_DIR})
target_link_libraries(video_core PRIVATE ${FFmpeg_LIBRARIES})
target_link_options(video_core PRIVATE ${FFmpeg_LDFLAGS})
add_dependencies(video_core host_shaders)
target_include_directories(video_core PRIVATE ${HOST_SHADERS_INCLUDE})

228
src/video_core/command_classes/codecs/codec.cpp
View file

@ -5,6 +5,7 @@
#include <fstream>
#include <vector>
#include "common/assert.h"
#include "common/settings.h"
#include "video_core/command_classes/codecs/codec.h"
#include "video_core/command_classes/codecs/h264.h"
#include "video_core/command_classes/codecs/vp9.h"
@ -16,44 +17,28 @@ extern "C" {
}
namespace Tegra {
#if defined(LIBVA_FOUND)
// Hardware acceleration code from FFmpeg/doc/examples/hw_decode.c originally under MIT license
namespace {
constexpr std::array<const char*, 2> VAAPI_DRIVERS = {
"i915",
"amdgpu",
};
constexpr AVPixelFormat PREFERRED_GPU_FMT = AV_PIX_FMT_NV12;
constexpr AVPixelFormat PREFERRED_CPU_FMT = AV_PIX_FMT_YUV420P;
AVPixelFormat GetHwFormat(AVCodecContext*, const AVPixelFormat* pix_fmts) {
void AVPacketDeleter(AVPacket* ptr) {
av_packet_free(&ptr);
}
using AVPacketPtr = std::unique_ptr<AVPacket, decltype(&AVPacketDeleter)>;
AVPixelFormat GetGpuFormat(AVCodecContext* av_codec_ctx, const AVPixelFormat* pix_fmts) {
for (const AVPixelFormat* p = pix_fmts; *p != AV_PIX_FMT_NONE; ++p) {
if (*p == AV_PIX_FMT_VAAPI) {
return AV_PIX_FMT_VAAPI;
if (*p == av_codec_ctx->pix_fmt) {
return av_codec_ctx->pix_fmt;
}
}
LOG_INFO(Service_NVDRV, "Could not find compatible GPU AV format, falling back to CPU");
return *pix_fmts;
}
bool CreateVaapiHwdevice(AVBufferRef** av_hw_device) {
AVDictionary* hwdevice_options = nullptr;
av_dict_set(&hwdevice_options, "connection_type", "drm", 0);
for (const auto& driver : VAAPI_DRIVERS) {
av_dict_set(&hwdevice_options, "kernel_driver", driver, 0);
const int hwdevice_error = av_hwdevice_ctx_create(av_hw_device, 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);
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);
return false;
av_buffer_unref(&av_codec_ctx->hw_device_ctx);
av_codec_ctx->pix_fmt = PREFERRED_CPU_FMT;
return PREFERRED_CPU_FMT;
}
} // namespace
#endif
void AVFrameDeleter(AVFrame* ptr) {
av_frame_free(&ptr);
@ -68,56 +53,110 @@ Codec::~Codec() {
return;
}
// Free libav memory
avcodec_send_packet(av_codec_ctx, nullptr);
AVFrame* av_frame = av_frame_alloc();
avcodec_receive_frame(av_codec_ctx, av_frame);
avcodec_flush_buffers(av_codec_ctx);
av_frame_free(&av_frame);
avcodec_close(av_codec_ctx);
av_buffer_unref(&av_hw_device);
avcodec_free_context(&av_codec_ctx);
av_buffer_unref(&av_gpu_decoder);
}
void Codec::InitializeHwdec() {
// Prioritize integrated GPU to mitigate bandwidth bottlenecks
bool Codec::CreateGpuAvDevice() {
#if defined(LIBVA_FOUND)
if (CreateVaapiHwdevice(&av_hw_device)) {
const auto hw_device_ctx = av_buffer_ref(av_hw_device);
ASSERT_MSG(hw_device_ctx, "av_buffer_ref failed");
av_codec_ctx->hw_device_ctx = hw_device_ctx;
av_codec_ctx->get_format = GetHwFormat;
static constexpr std::array<const char*, 3> VAAPI_DRIVERS = {
"i915",
"iHD",
"amdgpu",
};
AVDictionary* hwdevice_options = nullptr;
av_dict_set(&hwdevice_options, "connection_type", "drm", 0);
for (const auto& driver : VAAPI_DRIVERS) {
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{
AV_HWDEVICE_TYPE_CUDA,
#ifdef _WIN32
AV_HWDEVICE_TYPE_D3D11VA,
#else
AV_HWDEVICE_TYPE_VDPAU,
#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;
}
for (int i = 0;; i++) {
const AVCodecHWConfig* config = avcodec_get_hw_config(av_codec, i);
if (!config) {
LOG_DEBUG(Service_NVDRV, "{} decoder does not support device type {}.",
av_codec->name, av_hwdevice_get_type_name(type));
break;
}
if (config->methods & HW_CONFIG_METHOD && config->device_type == type) {
av_codec_ctx->pix_fmt = config->pix_fmt;
LOG_INFO(Service_NVDRV, "Using {} GPU decoder", av_hwdevice_get_type_name(type));
return true;
}
}
}
return false;
}
void Codec::InitializeAvCodecContext() {
av_codec_ctx = avcodec_alloc_context3(av_codec);
av_opt_set(av_codec_ctx->priv_data, "tune", "zerolatency", 0);
}
void Codec::InitializeGpuDecoder() {
if (!CreateGpuAvDevice()) {
av_buffer_unref(&av_gpu_decoder);
return;
}
#endif
// TODO more GPU accelerated decoders
auto* hw_device_ctx = av_buffer_ref(av_gpu_decoder);
ASSERT_MSG(hw_device_ctx, "av_buffer_ref failed");
av_codec_ctx->hw_device_ctx = hw_device_ctx;
av_codec_ctx->get_format = GetGpuFormat;
}
void Codec::Initialize() {
AVCodecID codec;
switch (current_codec) {
case NvdecCommon::VideoCodec::H264:
codec = AV_CODEC_ID_H264;
break;
case NvdecCommon::VideoCodec::Vp9:
codec = AV_CODEC_ID_VP9;
break;
default:
UNIMPLEMENTED_MSG("Unknown codec {}", current_codec);
const AVCodecID codec = [&] {
switch (current_codec) {
case NvdecCommon::VideoCodec::H264:
return AV_CODEC_ID_H264;
case NvdecCommon::VideoCodec::Vp9:
return AV_CODEC_ID_VP9;
default:
UNIMPLEMENTED_MSG("Unknown codec {}", current_codec);
return AV_CODEC_ID_NONE;
}
}();
av_codec = avcodec_find_decoder(codec);
InitializeAvCodecContext();
if (Settings::values.nvdec_emulation.GetValue() == Settings::NvdecEmulation::GPU) {
InitializeGpuDecoder();
}
if (const int res = avcodec_open2(av_codec_ctx, av_codec, nullptr); res < 0) {
LOG_ERROR(Service_NVDRV, "avcodec_open2() Failed with result {}", res);
avcodec_free_context(&av_codec_ctx);
av_buffer_unref(&av_gpu_decoder);
return;
}
av_codec = avcodec_find_decoder(codec);
av_codec_ctx = avcodec_alloc_context3(av_codec);
av_opt_set(av_codec_ctx->priv_data, "tune", "zerolatency", 0);
InitializeHwdec();
if (!av_codec_ctx->hw_device_ctx) {
LOG_INFO(Service_NVDRV, "Using FFmpeg software decoding");
}
const auto av_error = avcodec_open2(av_codec_ctx, av_codec, nullptr);
if (av_error < 0) {
LOG_ERROR(Service_NVDRV, "avcodec_open2() Failed.");
avcodec_close(av_codec_ctx);
av_buffer_unref(&av_hw_device);
return;
}
initialized = true;
}
@ -133,6 +172,9 @@ void Codec::Decode() {
if (is_first_frame) {
Initialize();
}
if (!initialized) {
return;
}
bool vp9_hidden_frame = false;
std::vector<u8> frame_data;
if (current_codec == NvdecCommon::VideoCodec::H264) {
@ -141,50 +183,48 @@ void Codec::Decode() {
frame_data = vp9_decoder->ComposeFrameHeader(state);
vp9_hidden_frame = vp9_decoder->WasFrameHidden();
}
AVPacket packet{};
av_init_packet(&packet);
packet.data = frame_data.data();
packet.size = static_cast<s32>(frame_data.size());
if (const int ret = avcodec_send_packet(av_codec_ctx, &packet); ret) {
LOG_DEBUG(Service_NVDRV, "avcodec_send_packet error {}", ret);
AVPacketPtr packet{av_packet_alloc(), AVPacketDeleter};
if (!packet) {
LOG_ERROR(Service_NVDRV, "av_packet_alloc failed");
return;
}
packet->data = frame_data.data();
packet->size = static_cast<s32>(frame_data.size());
if (const int res = avcodec_send_packet(av_codec_ctx, packet.get()); res != 0) {
LOG_DEBUG(Service_NVDRV, "avcodec_send_packet error {}", res);
return;
}
// Only receive/store visible frames
if (vp9_hidden_frame) {
return;
}
AVFrame* hw_frame = av_frame_alloc();
AVFrame* sw_frame = hw_frame;
ASSERT_MSG(hw_frame, "av_frame_alloc hw_frame failed");
if (const int ret = avcodec_receive_frame(av_codec_ctx, hw_frame); ret) {
AVFramePtr initial_frame{av_frame_alloc(), AVFrameDeleter};
AVFramePtr final_frame{nullptr, AVFrameDeleter};
ASSERT_MSG(initial_frame, "av_frame_alloc initial_frame failed");
if (const int ret = avcodec_receive_frame(av_codec_ctx, initial_frame.get()); ret) {
LOG_DEBUG(Service_NVDRV, "avcodec_receive_frame error {}", ret);
av_frame_free(&hw_frame);
return;
}
if (!hw_frame->width || !hw_frame->height) {
if (initial_frame->width == 0 || initial_frame->height == 0) {
LOG_WARNING(Service_NVDRV, "Zero width or height in frame");
av_frame_free(&hw_frame);
return;
}
#if defined(LIBVA_FOUND)
// Hardware acceleration code from FFmpeg/doc/examples/hw_decode.c under MIT license
if (hw_frame->format == AV_PIX_FMT_VAAPI) {
sw_frame = av_frame_alloc();
ASSERT_MSG(sw_frame, "av_frame_alloc sw_frame failed");
if (av_codec_ctx->hw_device_ctx) {
final_frame = AVFramePtr{av_frame_alloc(), AVFrameDeleter};
ASSERT_MSG(final_frame, "av_frame_alloc final_frame failed");
// Can't use AV_PIX_FMT_YUV420P and share code with software decoding in vic.cpp
// because Intel drivers crash unless using AV_PIX_FMT_NV12
sw_frame->format = AV_PIX_FMT_NV12;
const int transfer_data_ret = av_hwframe_transfer_data(sw_frame, hw_frame, 0);
ASSERT_MSG(!transfer_data_ret, "av_hwframe_transfer_data error {}", transfer_data_ret);
av_frame_free(&hw_frame);
final_frame->format = PREFERRED_GPU_FMT;
const int ret = av_hwframe_transfer_data(final_frame.get(), initial_frame.get(), 0);
ASSERT_MSG(!ret, "av_hwframe_transfer_data error {}", ret);
} else {
final_frame = std::move(initial_frame);
}
#endif
if (sw_frame->format != AV_PIX_FMT_YUV420P && sw_frame->format != AV_PIX_FMT_NV12) {
UNIMPLEMENTED_MSG("Unexpected video format from host graphics: {}", sw_frame->format);
av_frame_free(&sw_frame);
if (final_frame->format != PREFERRED_CPU_FMT && final_frame->format != PREFERRED_GPU_FMT) {
UNIMPLEMENTED_MSG("Unexpected video format: {}", final_frame->format);
return;
}
av_frames.push(AVFramePtr{sw_frame, AVFrameDeleter});
av_frames.push(std::move(final_frame));
if (av_frames.size() > 10) {
LOG_TRACE(Service_NVDRV, "av_frames.push overflow dropped frame");
av_frames.pop();

9
src/video_core/command_classes/codecs/codec.h
View file

@ -50,18 +50,23 @@ public:
/// Returns the value of current_codec
[[nodiscard]] NvdecCommon::VideoCodec GetCurrentCodec() const;
/// Return name of the current codec
[[nodiscard]] std::string_view GetCurrentCodecName() const;
private:
void InitializeHwdec();
void InitializeAvCodecContext();
void InitializeGpuDecoder();
bool CreateGpuAvDevice();
bool initialized{};
NvdecCommon::VideoCodec current_codec{NvdecCommon::VideoCodec::None};
AVCodec* av_codec{nullptr};
AVBufferRef* av_hw_device{nullptr};
AVCodecContext* av_codec_ctx{nullptr};
AVBufferRef* av_gpu_decoder{nullptr};
GPU& gpu;
const NvdecCommon::NvdecRegisters& state;

3
src/video_core/command_classes/codecs/h264.cpp
View file

@ -95,7 +95,8 @@ const std::vector<u8>& H264::ComposeFrameHeader(const NvdecCommon::NvdecRegister
const s32 pic_height = context.h264_parameter_set.frame_height_in_map_units /
(context.h264_parameter_set.frame_mbs_only_flag ? 1 : 2);
writer.WriteUe(16);
// TODO (ameerj): Where do we get this number, it seems to be particular for each stream
writer.WriteUe(6); // Max number of reference frames
writer.WriteBit(false);
writer.WriteUe(context.h264_parameter_set.pic_width_in_mbs - 1);
writer.WriteUe(pic_height - 1);

3
src/video_core/video_core.cpp
View file

@ -37,7 +37,8 @@ std::unique_ptr<VideoCore::RendererBase> CreateRenderer(
namespace VideoCore {
std::unique_ptr<Tegra::GPU> CreateGPU(Core::Frontend::EmuWindow& emu_window, Core::System& system) {
const bool use_nvdec = Settings::values.use_nvdec_emulation.GetValue();
const auto nvdec_value = Settings::values.nvdec_emulation.GetValue();
const bool use_nvdec = nvdec_value != Settings::NvdecEmulation::Off;
const bool use_async = Settings::values.use_asynchronous_gpu_emulation.GetValue();
auto gpu = std::make_unique<Tegra::GPU>(system, use_async, use_nvdec);
auto context = emu_window.CreateSharedContext();