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// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
// SPDX-License-Identifier: GPL-3.0-or-later
// SPDX-FileCopyrightText: Copyright 2020 yuzu Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#include <variant>
#include "common/assert.h"
#include "common/polyfill_thread.h"
#include "common/settings.h"
#include "video_core/host1x/codecs/h264.h"
#include "video_core/host1x/codecs/vp8.h"
#include "video_core/host1x/codecs/vp9.h"
#include "video_core/host1x/host1x.h"
#include "video_core/host1x/nvdec.h"
namespace Tegra::Host1x {
#define NVDEC_REG_INDEX(field_name) \
(offsetof(NvdecCommon::NvdecRegisters, field_name) / sizeof(u64))
Nvdec::Nvdec(Host1x& host1x_, s32 id_, u32 syncpt)
: CDmaPusher{host1x_, id_}
, id{id_}
, syncpoint{syncpt}
{
LOG_INFO(HW_GPU, "Created nvdec {}", id);
host1x.frame_queue.Open(id);
}
Nvdec::~Nvdec() {
LOG_INFO(HW_GPU, "Destroying nvdec {}", id);
host1x.frame_queue.Close(id);
}
void Nvdec::ProcessMethod(u32 method, u32 argument) {
regs.reg_array[method] = argument;
switch (method) {
case NVDEC_REG_INDEX(set_codec_id):
CreateDecoder(static_cast<NvdecCommon::VideoCodec>(argument));
break;
case NVDEC_REG_INDEX(execute): {
Execute();
} break;
}
}
void Nvdec::CreateDecoder(NvdecCommon::VideoCodec codec) {
if (std::holds_alternative<std::monostate>(decoder)) {
switch (codec) {
case NvdecCommon::VideoCodec::H264:
decoder.emplace<Decoders::H264>(host1x, regs, id);
break;
case NvdecCommon::VideoCodec::VP8:
decoder.emplace<Decoders::VP8>(host1x, regs, id);
break;
case NvdecCommon::VideoCodec::VP9:
decoder.emplace<Decoders::VP9>(host1x, regs, id);
break;
default:
break;
}
LOG_INFO(HW_GPU, "Created decoder {} for id {}", codec, id);
}
}
void Nvdec::Execute() {
if (Settings::values.nvdec_emulation.GetValue() == Settings::NvdecEmulation::Off) [[unlikely]] {
// Signalling syncpts too fast can cause games to get stuck as they don't expect a <1ms
// execution time. Sleep for half of a 60 fps frame just in case.
std::this_thread::sleep_for(std::chrono::milliseconds(8));
return;
}
if (auto* h264 = std::get_if<Decoders::H264>(&decoder)) {
h264->Decode();
} else if (auto* vp8 = std::get_if<Decoders::VP8>(&decoder)) {
vp8->Decode();
} else if (auto* vp9 = std::get_if<Decoders::VP9>(&decoder)) {
vp9->Decode();
} else {
LOG_ERROR(HW_GPU, "Unrecognized codec executed?");
}
}
} // namespace Tegra::Host1x
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