30 files changed, 3311 insertions, 22 deletions

diff --git a/src/video_core/CMakeLists.txt b/src/video_core/CMakeLists.txt
index 77ebac19f..fdfc885fc 100644
--- a/src/video_core/CMakeLists.txt
+++ b/src/video_core/CMakeLists.txt
@@ -5,6 +5,24 @@ add_library(video_core STATIC
     buffer_cache/buffer_cache.h
     buffer_cache/map_interval.cpp
     buffer_cache/map_interval.h
+    cdma_pusher.cpp
+    cdma_pusher.h
+    command_classes/codecs/codec.cpp
+    command_classes/codecs/codec.h
+    command_classes/codecs/h264.cpp
+    command_classes/codecs/h264.h
+    command_classes/codecs/vp9.cpp
+    command_classes/codecs/vp9.h
+    command_classes/codecs/vp9_types.h
+    command_classes/host1x.cpp
+    command_classes/host1x.h
+    command_classes/nvdec.cpp
+    command_classes/nvdec.h
+    command_classes/nvdec_common.h
+    command_classes/sync_manager.cpp
+    command_classes/sync_manager.h
+    command_classes/vic.cpp
+    command_classes/vic.h
     compatible_formats.cpp
     compatible_formats.h
     dirty_flags.cpp
@@ -250,6 +268,14 @@ create_target_directory_groups(video_core)
 target_link_libraries(video_core PUBLIC common core)
 target_link_libraries(video_core PRIVATE glad xbyak)
 
+if (MSVC)
+    target_include_directories(video_core PRIVATE ${FFMPEG_INCLUDE_DIR})
+    target_link_libraries(video_core PUBLIC ${FFMPEG_LIBRARY_DIR}/swscale.lib ${FFMPEG_LIBRARY_DIR}/avcodec.lib ${FFMPEG_LIBRARY_DIR}/avutil.lib)
+else()
+    target_include_directories(video_core PRIVATE ${FFMPEG_INCLUDE_DIR})
+    target_link_libraries(video_core PRIVATE ${FFMPEG_LIBRARIES})
+endif()
+
 add_dependencies(video_core host_shaders)
 target_include_directories(video_core PRIVATE ${HOST_SHADERS_INCLUDE})
 
diff --git a/src/video_core/cdma_pusher.cpp b/src/video_core/cdma_pusher.cpp
new file mode 100644
index 000000000..d774db107
--- /dev/null
+++ b/src/video_core/cdma_pusher.cpp
@@ -0,0 +1,171 @@
+// MIT License
+//
+// Copyright (c) Ryujinx Team and Contributors
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy of this software and
+// associated documentation files (the "Software"), to deal in the Software without restriction,
+// including without limitation the rights to use, copy, modify, merge, publish, distribute,
+// sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in all copies or
+// substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT
+// NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+//
+
+#include "command_classes/host1x.h"
+#include "command_classes/nvdec.h"
+#include "command_classes/vic.h"
+#include "common/bit_util.h"
+#include "video_core/cdma_pusher.h"
+#include "video_core/command_classes/nvdec_common.h"
+#include "video_core/engines/maxwell_3d.h"
+#include "video_core/gpu.h"
+#include "video_core/memory_manager.h"
+
+namespace Tegra {
+CDmaPusher::CDmaPusher(GPU& gpu)
+    : gpu(gpu), nvdec_processor(std::make_shared<Nvdec>(gpu)),
+      vic_processor(std::make_unique<Vic>(gpu, nvdec_processor)),
+      host1x_processor(std::make_unique<Host1x>(gpu)),
+      nvdec_sync(std::make_unique<SyncptIncrManager>(gpu)),
+      vic_sync(std::make_unique<SyncptIncrManager>(gpu)) {}
+
+CDmaPusher::~CDmaPusher() = default;
+
+void CDmaPusher::Push(ChCommandHeaderList&& entries) {
+    cdma_queue.push(std::move(entries));
+}
+
+void CDmaPusher::DispatchCalls() {
+    while (!cdma_queue.empty()) {
+        Step();
+    }
+}
+
+void CDmaPusher::Step() {
+    const auto entries{cdma_queue.front()};
+    cdma_queue.pop();
+
+    std::vector<u32> values(entries.size());
+    std::memcpy(values.data(), entries.data(), entries.size() * sizeof(u32));
+
+    for (const u32 value : values) {
+        if (mask != 0) {
+            const u32 lbs = Common::CountTrailingZeroes32(mask);
+            mask &= ~(1U << lbs);
+            ExecuteCommand(static_cast<u32>(offset + lbs), value);
+            continue;
+        } else if (count != 0) {
+            --count;
+            ExecuteCommand(static_cast<u32>(offset), value);
+            if (incrementing) {
+                ++offset;
+            }
+            continue;
+        }
+        const auto mode = static_cast<ChSubmissionMode>((value >> 28) & 0xf);
+        switch (mode) {
+        case ChSubmissionMode::SetClass: {
+            mask = value & 0x3f;
+            offset = (value >> 16) & 0xfff;
+            current_class = static_cast<ChClassId>((value >> 6) & 0x3ff);
+            break;
+        }
+        case ChSubmissionMode::Incrementing:
+        case ChSubmissionMode::NonIncrementing:
+            count = value & 0xffff;
+            offset = (value >> 16) & 0xfff;
+            incrementing = mode == ChSubmissionMode::Incrementing;
+            break;
+        case ChSubmissionMode::Mask:
+            mask = value & 0xffff;
+            offset = (value >> 16) & 0xfff;
+            break;
+        case ChSubmissionMode::Immediate: {
+            const u32 data = value & 0xfff;
+            offset = (value >> 16) & 0xfff;
+            ExecuteCommand(static_cast<u32>(offset), data);
+            break;
+        }
+        default:
+            UNIMPLEMENTED_MSG("ChSubmission mode {} is not implemented!", static_cast<u32>(mode));
+            break;
+        }
+    }
+}
+
+void CDmaPusher::ExecuteCommand(u32 offset, u32 data) {
+    switch (current_class) {
+    case ChClassId::NvDec:
+        ThiStateWrite(nvdec_thi_state, offset, {data});
+        switch (static_cast<ThiMethod>(offset)) {
+        case ThiMethod::IncSyncpt: {
+            LOG_DEBUG(Service_NVDRV, "NVDEC Class IncSyncpt Method");
+            const auto syncpoint_id = static_cast<u32>(data & 0xFF);
+            const auto cond = static_cast<u32>((data >> 8) & 0xFF);
+            if (cond == 0) {
+                nvdec_sync->Increment(syncpoint_id);
+            } else {
+                nvdec_sync->IncrementWhenDone(static_cast<u32>(current_class), syncpoint_id);
+                nvdec_sync->SignalDone(syncpoint_id);
+            }
+            break;
+        }
+        case ThiMethod::SetMethod1:
+            LOG_DEBUG(Service_NVDRV, "NVDEC method 0x{:X}",
+                      static_cast<u32>(nvdec_thi_state.method_0));
+            nvdec_processor->ProcessMethod(
+                static_cast<Tegra::Nvdec::Method>(nvdec_thi_state.method_0), {data});
+            break;
+        default:
+            break;
+        }
+        break;
+    case ChClassId::GraphicsVic:
+        ThiStateWrite(vic_thi_state, static_cast<u32>(offset), {data});
+        switch (static_cast<ThiMethod>(offset)) {
+        case ThiMethod::IncSyncpt: {
+            LOG_DEBUG(Service_NVDRV, "VIC Class IncSyncpt Method");
+            const auto syncpoint_id = static_cast<u32>(data & 0xFF);
+            const auto cond = static_cast<u32>((data >> 8) & 0xFF);
+            if (cond == 0) {
+                vic_sync->Increment(syncpoint_id);
+            } else {
+                vic_sync->IncrementWhenDone(static_cast<u32>(current_class), syncpoint_id);
+                vic_sync->SignalDone(syncpoint_id);
+            }
+            break;
+        }
+        case ThiMethod::SetMethod1:
+            LOG_DEBUG(Service_NVDRV, "VIC method 0x{:X}, Args=({})",
+                      static_cast<u32>(vic_thi_state.method_0));
+            vic_processor->ProcessMethod(static_cast<Tegra::Vic::Method>(vic_thi_state.method_0),
+                                         {data});
+            break;
+        default:
+            break;
+        }
+        break;
+    case ChClassId::Host1x:
+        // This device is mainly for syncpoint synchronization
+        LOG_DEBUG(Service_NVDRV, "Host1X Class Method");
+        host1x_processor->ProcessMethod(static_cast<Tegra::Host1x::Method>(offset), {data});
+        break;
+    default:
+        UNIMPLEMENTED_MSG("Current class not implemented {:X}", static_cast<u32>(current_class));
+        break;
+    }
+}
+
+void CDmaPusher::ThiStateWrite(ThiRegisters& state, u32 offset, const std::vector<u32>& arguments) {
+    u8* const state_offset = reinterpret_cast<u8*>(&state) + sizeof(u32) * offset;
+    std::memcpy(state_offset, arguments.data(), sizeof(u32) * arguments.size());
+}
+
+} // namespace Tegra
diff --git a/src/video_core/cdma_pusher.h b/src/video_core/cdma_pusher.h
new file mode 100644
index 000000000..982f309c5
--- /dev/null
+++ b/src/video_core/cdma_pusher.h
@@ -0,0 +1,138 @@
+// Copyright 2020 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <memory>
+#include <unordered_map>
+#include <vector>
+#include <queue>
+
+#include "common/bit_field.h"
+#include "common/common_types.h"
+#include "video_core/command_classes/sync_manager.h"
+
+namespace Tegra {
+
+class GPU;
+class Nvdec;
+class Vic;
+class Host1x;
+
+enum class ChSubmissionMode : u32 {
+    SetClass = 0,
+    Incrementing = 1,
+    NonIncrementing = 2,
+    Mask = 3,
+    Immediate = 4,
+    Restart = 5,
+    Gather = 6,
+};
+
+enum class ChClassId : u32 {
+    NoClass = 0x0,
+    Host1x = 0x1,
+    VideoEncodeMpeg = 0x20,
+    VideoEncodeNvEnc = 0x21,
+    VideoStreamingVi = 0x30,
+    VideoStreamingIsp = 0x32,
+    VideoStreamingIspB = 0x34,
+    VideoStreamingViI2c = 0x36,
+    GraphicsVic = 0x5d,
+    Graphics3D = 0x60,
+    GraphicsGpu = 0x61,
+    Tsec = 0xe0,
+    TsecB = 0xe1,
+    NvJpg = 0xc0,
+    NvDec = 0xf0
+};
+
+enum class ChMethod : u32 {
+    Empty = 0,
+    SetMethod = 0x10,
+    SetData = 0x11,
+};
+
+union ChCommandHeader {
+    u32 raw;
+    BitField<0, 16, u32> value;
+    BitField<16, 12, ChMethod> method_offset;
+    BitField<28, 4, ChSubmissionMode> submission_mode;
+};
+static_assert(sizeof(ChCommandHeader) == sizeof(u32), "ChCommand header is an invalid size");
+
+struct ChCommand {
+    ChClassId class_id{};
+    int method_offset{};
+    std::vector<u32> arguments;
+};
+
+using ChCommandHeaderList = std::vector<Tegra::ChCommandHeader>;
+using ChCommandList = std::vector<Tegra::ChCommand>;
+
+struct ThiRegisters {
+    u32_le increment_syncpt{};
+    INSERT_PADDING_WORDS(1);
+    u32_le increment_syncpt_error{};
+    u32_le ctx_switch_incremement_syncpt{};
+    INSERT_PADDING_WORDS(4);
+    u32_le ctx_switch{};
+    INSERT_PADDING_WORDS(1);
+    u32_le ctx_syncpt_eof{};
+    INSERT_PADDING_WORDS(5);
+    u32_le method_0{};
+    u32_le method_1{};
+    INSERT_PADDING_WORDS(12);
+    u32_le int_status{};
+    u32_le int_mask{};
+};
+
+enum class ThiMethod : u32 {
+    IncSyncpt = offsetof(ThiRegisters, increment_syncpt) / sizeof(u32),
+    SetMethod0 = offsetof(ThiRegisters, method_0) / sizeof(u32),
+    SetMethod1 = offsetof(ThiRegisters, method_1) / sizeof(u32),
+};
+
+class CDmaPusher {
+public:
+    explicit CDmaPusher(GPU& gpu);
+    ~CDmaPusher();
+
+    /// Push NVDEC command buffer entries into queue
+    void Push(ChCommandHeaderList&& entries);
+
+    /// Process queued command buffer entries
+    void DispatchCalls();
+
+    /// Process one queue element
+    void Step();
+
+    /// Invoke command class devices to execute the command based on the current state
+    void ExecuteCommand(u32 offset, u32 data);
+
+private:
+    /// Write arguments value to the ThiRegisters member at the specified offset
+    void ThiStateWrite(ThiRegisters& state, u32 offset, const std::vector<u32>& arguments);
+
+    GPU& gpu;
+
+    std::shared_ptr<Tegra::Nvdec> nvdec_processor;
+    std::unique_ptr<Tegra::Vic> vic_processor;
+    std::unique_ptr<Tegra::Host1x> host1x_processor;
+    std::unique_ptr<SyncptIncrManager> nvdec_sync;
+    std::unique_ptr<SyncptIncrManager> vic_sync;
+    ChClassId current_class{};
+    ThiRegisters vic_thi_state{};
+    ThiRegisters nvdec_thi_state{};
+
+    s32 count{};
+    s32 offset{};
+    s32 mask{};
+    bool incrementing{};
+
+    // Queue of command lists to be processed
+    std::queue<ChCommandHeaderList> cdma_queue;
+};
+
+} // namespace Tegra
diff --git a/src/video_core/command_classes/codecs/codec.cpp b/src/video_core/command_classes/codecs/codec.cpp
new file mode 100644
index 000000000..2df410be8
--- /dev/null
+++ b/src/video_core/command_classes/codecs/codec.cpp
@@ -0,0 +1,114 @@
+// Copyright 2020 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include <cstring>
+#include <fstream>
+#include "common/assert.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"
+#include "video_core/gpu.h"
+#include "video_core/memory_manager.h"
+
+extern "C" {
+#include <libavutil/opt.h>
+}
+
+namespace Tegra {
+
+Codec::Codec(GPU& gpu_)
+    : gpu(gpu_), h264_decoder(std::make_unique<Decoder::H264>(gpu)),
+      vp9_decoder(std::make_unique<Decoder::VP9>(gpu)) {}
+
+Codec::~Codec() {
+    if (!initialized) {
+        return;
+    }
+    // Free libav memory
+    avcodec_send_packet(av_codec_ctx, nullptr);
+    avcodec_receive_frame(av_codec_ctx, av_frame);
+    avcodec_flush_buffers(av_codec_ctx);
+
+    av_frame_unref(av_frame);
+    av_free(av_frame);
+    avcodec_close(av_codec_ctx);
+}
+
+void Codec::SetTargetCodec(NvdecCommon::VideoCodec codec) {
+    LOG_INFO(Service_NVDRV, "NVDEC video codec initialized to {}", static_cast<u32>(codec));
+    current_codec = codec;
+}
+
+void Codec::StateWrite(u32 offset, u64 arguments) {
+    u8* const state_offset = reinterpret_cast<u8*>(&state) + offset * sizeof(u64);
+    std::memcpy(state_offset, &arguments, sizeof(u64));
+}
+
+void Codec::Decode() {
+    bool is_first_frame = false;
+
+    if (!initialized) {
+        if (current_codec == NvdecCommon::VideoCodec::H264) {
+            av_codec = avcodec_find_decoder(AV_CODEC_ID_H264);
+        } else if (current_codec == NvdecCommon::VideoCodec::Vp9) {
+            av_codec = avcodec_find_decoder(AV_CODEC_ID_VP9);
+        } else {
+            LOG_ERROR(Service_NVDRV, "Unknown video codec {}", static_cast<u32>(current_codec));
+            return;
+        }
+
+        av_codec_ctx = avcodec_alloc_context3(av_codec);
+        av_frame = av_frame_alloc();
+        av_opt_set(av_codec_ctx->priv_data, "tune", "zerolatency", 0);
+
+        // TODO(ameerj): libavcodec gpu hw acceleration
+
+        const auto av_error = avcodec_open2(av_codec_ctx, av_codec, nullptr);
+        if (av_error < 0) {
+            LOG_ERROR(Service_NVDRV, "avcodec_open2() Failed.");
+            av_frame_unref(av_frame);
+            av_free(av_frame);
+            avcodec_close(av_codec_ctx);
+            return;
+        }
+        initialized = true;
+        is_first_frame = true;
+    }
+    bool vp9_hidden_frame = false;
+
+    AVPacket packet{};
+    av_init_packet(&packet);
+    std::vector<u8> frame_data;
+
+    if (current_codec == NvdecCommon::VideoCodec::H264) {
+        frame_data = h264_decoder->ComposeFrameHeader(state, is_first_frame);
+    } else if (current_codec == NvdecCommon::VideoCodec::Vp9) {
+        frame_data = vp9_decoder->ComposeFrameHeader(state);
+        vp9_hidden_frame = vp9_decoder->WasFrameHidden();
+    }
+
+    packet.data = frame_data.data();
+    packet.size = static_cast<int>(frame_data.size());
+
+    avcodec_send_packet(av_codec_ctx, &packet);
+
+    if (!vp9_hidden_frame) {
+        // Only receive/store visible frames
+        avcodec_receive_frame(av_codec_ctx, av_frame);
+    }
+}
+
+AVFrame* Codec::GetCurrentFrame() {
+    return av_frame;
+}
+
+const AVFrame* Codec::GetCurrentFrame() const {
+    return av_frame;
+}
+
+NvdecCommon::VideoCodec Codec::GetCurrentCodec() const {
+    return current_codec;
+}
+
+} // namespace Tegra
diff --git a/src/video_core/command_classes/codecs/codec.h b/src/video_core/command_classes/codecs/codec.h
new file mode 100644
index 000000000..2e56daf29
--- /dev/null
+++ b/src/video_core/command_classes/codecs/codec.h
@@ -0,0 +1,68 @@
+// Copyright 2020 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <memory>
+#include <vector>
+#include "common/common_funcs.h"
+#include "common/common_types.h"
+#include "video_core/command_classes/nvdec_common.h"
+
+extern "C" {
+#if defined(__GNUC__) || defined(__clang__)
+#pragma GCC diagnostic ignored "-Wconversion"
+#endif
+#include <libavcodec/avcodec.h>
+#if defined(__GNUC__) || defined(__clang__)
+#pragma GCC diagnostic pop
+#endif
+}
+
+namespace Tegra {
+class GPU;
+struct VicRegisters;
+
+namespace Decoder {
+class H264;
+class VP9;
+} // namespace Decoder
+
+class Codec {
+public:
+    explicit Codec(GPU& gpu);
+    ~Codec();
+
+    /// Sets NVDEC video stream codec
+    void SetTargetCodec(NvdecCommon::VideoCodec codec);
+
+    /// Populate NvdecRegisters state with argument value at the provided offset
+    void StateWrite(u32 offset, u64 arguments);
+
+    /// Call decoders to construct headers, decode AVFrame with ffmpeg
+    void Decode();
+
+    /// Returns most recently decoded frame
+    AVFrame* GetCurrentFrame();
+    const AVFrame* GetCurrentFrame() const;
+
+    /// Returns the value of current_codec
+    NvdecCommon::VideoCodec GetCurrentCodec() const;
+
+private:
+    bool initialized{};
+    NvdecCommon::VideoCodec current_codec{NvdecCommon::VideoCodec::None};
+
+    AVCodec* av_codec{nullptr};
+    AVCodecContext* av_codec_ctx{nullptr};
+    AVFrame* av_frame{nullptr};
+
+    GPU& gpu;
+    std::unique_ptr<Decoder::H264> h264_decoder;
+    std::unique_ptr<Decoder::VP9> vp9_decoder;
+
+    NvdecCommon::NvdecRegisters state{};
+};
+
+} // namespace Tegra
diff --git a/src/video_core/command_classes/codecs/h264.cpp b/src/video_core/command_classes/codecs/h264.cpp
new file mode 100644
index 000000000..1a39f7b23
--- /dev/null
+++ b/src/video_core/command_classes/codecs/h264.cpp
@@ -0,0 +1,276 @@
+// MIT License
+//
+// Copyright (c) Ryujinx Team and Contributors
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy of this software and
+// associated documentation files (the "Software"), to deal in the Software without restriction,
+// including without limitation the rights to use, copy, modify, merge, publish, distribute,
+// sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in all copies or
+// substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT
+// NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+//
+
+#include "common/bit_util.h"
+#include "video_core/command_classes/codecs/h264.h"
+#include "video_core/gpu.h"
+#include "video_core/memory_manager.h"
+
+namespace Tegra::Decoder {
+H264::H264(GPU& gpu_) : gpu(gpu_) {}
+
+H264::~H264() = default;
+
+std::vector<u8>& H264::ComposeFrameHeader(NvdecCommon::NvdecRegisters& state, bool is_first_frame) {
+    H264DecoderContext context{};
+    gpu.MemoryManager().ReadBlock(state.picture_info_offset, &context, sizeof(H264DecoderContext));
+
+    const s32 frame_number = static_cast<s32>((context.h264_parameter_set.flags >> 46) & 0x1ffff);
+    if (!is_first_frame && frame_number != 0) {
+        frame.resize(context.frame_data_size);
+
+        gpu.MemoryManager().ReadBlock(state.frame_bitstream_offset, frame.data(), frame.size());
+    } else {
+        /// Encode header
+        H264BitWriter writer{};
+        writer.WriteU(1, 24);
+        writer.WriteU(0, 1);
+        writer.WriteU(3, 2);
+        writer.WriteU(7, 5);
+        writer.WriteU(100, 8);
+        writer.WriteU(0, 8);
+        writer.WriteU(31, 8);
+        writer.WriteUe(0);
+        const s32 chroma_format_idc = (context.h264_parameter_set.flags >> 12) & 0x3;
+        writer.WriteUe(chroma_format_idc);
+        if (chroma_format_idc == 3) {
+            writer.WriteBit(false);
+        }
+
+        writer.WriteUe(0);
+        writer.WriteUe(0);
+        writer.WriteBit(false); // QpprimeYZeroTransformBypassFlag
+        writer.WriteBit(false); // Scaling matrix present flag
+
+        const s32 order_cnt_type = static_cast<s32>((context.h264_parameter_set.flags >> 14) & 3);
+        writer.WriteUe(static_cast<s32>((context.h264_parameter_set.flags >> 8) & 0xf));
+        writer.WriteUe(order_cnt_type);
+        if (order_cnt_type == 0) {
+            writer.WriteUe(context.h264_parameter_set.log2_max_pic_order_cnt);
+        } else if (order_cnt_type == 1) {
+            writer.WriteBit(context.h264_parameter_set.delta_pic_order_always_zero_flag != 0);
+
+            writer.WriteSe(0);
+            writer.WriteSe(0);
+            writer.WriteUe(0);
+        }
+
+        const s32 pic_height = context.h264_parameter_set.pic_height_in_map_units /
+                               (context.h264_parameter_set.frame_mbs_only_flag ? 1 : 2);
+
+        writer.WriteUe(16);
+        writer.WriteBit(false);
+        writer.WriteUe(context.h264_parameter_set.pic_width_in_mbs - 1);
+        writer.WriteUe(pic_height - 1);
+        writer.WriteBit(context.h264_parameter_set.frame_mbs_only_flag != 0);
+
+        if (!context.h264_parameter_set.frame_mbs_only_flag) {
+            writer.WriteBit(((context.h264_parameter_set.flags >> 0) & 1) != 0);
+        }
+
+        writer.WriteBit(((context.h264_parameter_set.flags >> 1) & 1) != 0);
+        writer.WriteBit(false); // Frame cropping flag
+        writer.WriteBit(false); // VUI parameter present flag
+
+        writer.End();
+
+        // H264 PPS
+        writer.WriteU(1, 24);
+        writer.WriteU(0, 1);
+        writer.WriteU(3, 2);
+        writer.WriteU(8, 5);
+
+        writer.WriteUe(0);
+        writer.WriteUe(0);
+
+        writer.WriteBit(context.h264_parameter_set.entropy_coding_mode_flag);
+        writer.WriteBit(false);
+        writer.WriteUe(0);
+        writer.WriteUe(context.h264_parameter_set.num_refidx_l0_default_active);
+        writer.WriteUe(context.h264_parameter_set.num_refidx_l1_default_active);
+        writer.WriteBit(((context.h264_parameter_set.flags >> 2) & 1) != 0);
+        writer.WriteU(static_cast<s32>((context.h264_parameter_set.flags >> 32) & 0x3), 2);
+        s32 pic_init_qp = static_cast<s32>((context.h264_parameter_set.flags >> 16) & 0x3f);
+        pic_init_qp = (pic_init_qp << 26) >> 26;
+        writer.WriteSe(pic_init_qp);
+        writer.WriteSe(0);
+        s32 chroma_qp_index_offset =
+            static_cast<s32>((context.h264_parameter_set.flags >> 22) & 0x1f);
+        chroma_qp_index_offset = (chroma_qp_index_offset << 27) >> 27;
+
+        writer.WriteSe(chroma_qp_index_offset);
+        writer.WriteBit(context.h264_parameter_set.deblocking_filter_control_flag != 0);
+        writer.WriteBit(((context.h264_parameter_set.flags >> 3) & 1) != 0);
+        writer.WriteBit(context.h264_parameter_set.redundant_pic_count_flag != 0);
+        writer.WriteBit(context.h264_parameter_set.transform_8x8_mode_flag != 0);
+
+        writer.WriteBit(true);
+
+        for (s32 index = 0; index < 6; index++) {
+            writer.WriteBit(true);
+            const auto matrix_x4 =
+                std::vector<u8>(context.scaling_matrix_4.begin(), context.scaling_matrix_4.end());
+            writer.WriteScalingList(matrix_x4, index * 16, 16);
+        }
+
+        if (context.h264_parameter_set.transform_8x8_mode_flag) {
+            for (s32 index = 0; index < 2; index++) {
+                writer.WriteBit(true);
+                const auto matrix_x8 = std::vector<u8>(context.scaling_matrix_8.begin(),
+                                                       context.scaling_matrix_8.end());
+
+                writer.WriteScalingList(matrix_x8, index * 64, 64);
+            }
+        }
+
+        s32 chroma_qp_index_offset2 =
+            static_cast<s32>((context.h264_parameter_set.flags >> 27) & 0x1f);
+        chroma_qp_index_offset2 = (chroma_qp_index_offset2 << 27) >> 27;
+
+        writer.WriteSe(chroma_qp_index_offset2);
+
+        writer.End();
+
+        const auto& encoded_header = writer.GetByteArray();
+        frame.resize(encoded_header.size() + context.frame_data_size);
+        std::memcpy(frame.data(), encoded_header.data(), encoded_header.size());
+
+        gpu.MemoryManager().ReadBlock(state.frame_bitstream_offset,
+                                      frame.data() + encoded_header.size(),
+                                      context.frame_data_size);
+    }
+
+    return frame;
+}
+
+H264BitWriter::H264BitWriter() = default;
+
+H264BitWriter::~H264BitWriter() = default;
+
+void H264BitWriter::WriteU(s32 value, s32 value_sz) {
+    WriteBits(value, value_sz);
+}
+
+void H264BitWriter::WriteSe(s32 value) {
+    WriteExpGolombCodedInt(value);
+}
+
+void H264BitWriter::WriteUe(s32 value) {
+    WriteExpGolombCodedUInt((u32)value);
+}
+
+void H264BitWriter::End() {
+    WriteBit(true);
+    Flush();
+}
+
+void H264BitWriter::WriteBit(bool state) {
+    WriteBits(state ? 1 : 0, 1);
+}
+
+void H264BitWriter::WriteScalingList(const std::vector<u8>& list, s32 start, s32 count) {
+    std::vector<u8> scan(count);
+    if (count == 16) {
+        std::memcpy(scan.data(), zig_zag_scan.data(), scan.size());
+    } else {
+        std::memcpy(scan.data(), zig_zag_direct.data(), scan.size());
+    }
+    u8 last_scale = 8;
+
+    for (s32 index = 0; index < count; index++) {
+        const u8 value = list[start + scan[index]];
+        const s32 delta_scale = static_cast<s32>(value - last_scale);
+
+        WriteSe(delta_scale);
+
+        last_scale = value;
+    }
+}
+
+std::vector<u8>& H264BitWriter::GetByteArray() {
+    return byte_array;
+}
+
+const std::vector<u8>& H264BitWriter::GetByteArray() const {
+    return byte_array;
+}
+
+void H264BitWriter::WriteBits(s32 value, s32 bit_count) {
+    s32 value_pos = 0;
+
+    s32 remaining = bit_count;
+
+    while (remaining > 0) {
+        s32 copy_size = remaining;
+
+        const s32 free_bits = GetFreeBufferBits();
+
+        if (copy_size > free_bits) {
+            copy_size = free_bits;
+        }
+
+        const s32 mask = (1 << copy_size) - 1;
+
+        const s32 src_shift = (bit_count - value_pos) - copy_size;
+        const s32 dst_shift = (buffer_size - buffer_pos) - copy_size;
+
+        buffer |= ((value >> src_shift) & mask) << dst_shift;
+
+        value_pos += copy_size;
+        buffer_pos += copy_size;
+        remaining -= copy_size;
+    }
+}
+
+void H264BitWriter::WriteExpGolombCodedInt(s32 value) {
+    const s32 sign = value <= 0 ? 0 : 1;
+    if (value < 0) {
+        value = -value;
+    }
+    value = (value << 1) - sign;
+    WriteExpGolombCodedUInt(value);
+}
+
+void H264BitWriter::WriteExpGolombCodedUInt(u32 value) {
+    const s32 size = 32 - Common::CountLeadingZeroes32(static_cast<s32>(value + 1));
+    WriteBits(1, size);
+
+    value -= (1U << (size - 1)) - 1;
+    WriteBits(static_cast<s32>(value), size - 1);
+}
+
+s32 H264BitWriter::GetFreeBufferBits() {
+    if (buffer_pos == buffer_size) {
+        Flush();
+    }
+
+    return buffer_size - buffer_pos;
+}
+
+void H264BitWriter::Flush() {
+    if (buffer_pos == 0) {
+        return;
+    }
+    byte_array.push_back(static_cast<u8>(buffer));
+
+    buffer = 0;
+    buffer_pos = 0;
+}
+} // namespace Tegra::Decoder
diff --git a/src/video_core/command_classes/codecs/h264.h b/src/video_core/command_classes/codecs/h264.h
new file mode 100644
index 000000000..21752dd90
--- /dev/null
+++ b/src/video_core/command_classes/codecs/h264.h
@@ -0,0 +1,130 @@
+// MIT License
+//
+// Copyright (c) Ryujinx Team and Contributors
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy of this software and
+// associated documentation files (the "Software"), to deal in the Software without restriction,
+// including without limitation the rights to use, copy, modify, merge, publish, distribute,
+// sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in all copies or
+// substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT
+// NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+//
+
+#pragma once
+
+#include <vector>
+#include "common/common_funcs.h"
+#include "common/common_types.h"
+#include "video_core/command_classes/nvdec_common.h"
+
+namespace Tegra {
+class GPU;
+namespace Decoder {
+
+class H264BitWriter {
+public:
+    H264BitWriter();
+    ~H264BitWriter();
+
+    /// The following Write methods are based on clause 9.1 in the H.264 specification.
+    /// WriteSe and WriteUe write in the Exp-Golomb-coded syntax
+    void WriteU(s32 value, s32 value_sz);
+    void WriteSe(s32 value);
+    void WriteUe(s32 value);
+
+    /// Finalize the bitstream
+    void End();
+
+    /// append a bit to the stream, equivalent value to the state parameter
+    void WriteBit(bool state);
+
+    /// Based on section 7.3.2.1.1.1 and Table 7-4 in the H.264 specification
+    /// Writes the scaling matrices of the sream
+    void WriteScalingList(const std::vector<u8>& list, s32 start, s32 count);
+
+    /// Return the bitstream as a vector.
+    std::vector<u8>& GetByteArray();
+    const std::vector<u8>& GetByteArray() const;
+
+private:
+    // ZigZag LUTs from libavcodec.
+    static constexpr std::array<u8, 64> zig_zag_direct{
+        0,  1,  8,  16, 9,  2,  3,  10, 17, 24, 32, 25, 18, 11, 4,  5,  12, 19, 26, 33, 40, 48,
+        41, 34, 27, 20, 13, 6,  7,  14, 21, 28, 35, 42, 49, 56, 57, 50, 43, 36, 29, 22, 15, 23,
+        30, 37, 44, 51, 58, 59, 52, 45, 38, 31, 39, 46, 53, 60, 61, 54, 47, 55, 62, 63,
+    };
+
+    static constexpr std::array<u8, 16> zig_zag_scan{
+        0 + 0 * 4, 1 + 0 * 4, 0 + 1 * 4, 0 + 2 * 4, 1 + 1 * 4, 2 + 0 * 4, 3 + 0 * 4, 2 + 1 * 4,
+        1 + 2 * 4, 0 + 3 * 4, 1 + 3 * 4, 2 + 2 * 4, 3 + 1 * 4, 3 + 2 * 4, 2 + 3 * 4, 3 + 3 * 4,
+    };
+
+    void WriteBits(s32 value, s32 bit_count);
+    void WriteExpGolombCodedInt(s32 value);
+    void WriteExpGolombCodedUInt(u32 value);
+    s32 GetFreeBufferBits();
+    void Flush();
+
+    s32 buffer_size{8};
+
+    s32 buffer{};
+    s32 buffer_pos{};
+    std::vector<u8> byte_array;
+};
+
+class H264 {
+public:
+    explicit H264(GPU& gpu);
+    ~H264();
+
+    /// Compose the H264 header of the frame for FFmpeg decoding
+    std::vector<u8>& ComposeFrameHeader(NvdecCommon::NvdecRegisters& state,
+                                        bool is_first_frame = false);
+
+private:
+    struct H264ParameterSet {
+        u32 log2_max_pic_order_cnt{};
+        u32 delta_pic_order_always_zero_flag{};
+        u32 frame_mbs_only_flag{};
+        u32 pic_width_in_mbs{};
+        u32 pic_height_in_map_units{};
+        INSERT_PADDING_WORDS(1);
+        u32 entropy_coding_mode_flag{};
+        u32 bottom_field_pic_order_flag{};
+        u32 num_refidx_l0_default_active{};
+        u32 num_refidx_l1_default_active{};
+        u32 deblocking_filter_control_flag{};
+        u32 redundant_pic_count_flag{};
+        u32 transform_8x8_mode_flag{};
+        INSERT_PADDING_WORDS(9);
+        u64 flags{};
+        u32 frame_number{};
+        u32 frame_number2{};
+    };
+    static_assert(sizeof(H264ParameterSet) == 0x68, "H264ParameterSet is an invalid size");
+
+    struct H264DecoderContext {
+        INSERT_PADDING_BYTES(0x48);
+        u32 frame_data_size{};
+        INSERT_PADDING_BYTES(0xc);
+        H264ParameterSet h264_parameter_set{};
+        INSERT_PADDING_BYTES(0x100);
+        std::array<u8, 0x60> scaling_matrix_4;
+        std::array<u8, 0x80> scaling_matrix_8;
+    };
+    static_assert(sizeof(H264DecoderContext) == 0x2a0, "H264DecoderContext is an invalid size");
+
+    std::vector<u8> frame;
+    GPU& gpu;
+};
+
+} // namespace Decoder
+} // namespace Tegra
diff --git a/src/video_core/command_classes/codecs/vp9.cpp b/src/video_core/command_classes/codecs/vp9.cpp
new file mode 100644
index 000000000..3bae0bb5d
--- /dev/null
+++ b/src/video_core/command_classes/codecs/vp9.cpp
@@ -0,0 +1,1010 @@
+// Copyright 2020 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include <cstring> // for std::memcpy
+#include <numeric>
+#include "video_core/command_classes/codecs/vp9.h"
+#include "video_core/gpu.h"
+#include "video_core/memory_manager.h"
+
+namespace Tegra::Decoder {
+
+// Default compressed header probabilities once frame context resets
+constexpr Vp9EntropyProbs default_probs{
+    .y_mode_prob{
+        65,  32, 18, 144, 162, 194, 41, 51, 98, 132, 68,  18, 165, 217, 196, 45, 40, 78,
+        173, 80, 19, 176, 240, 193, 64, 35, 46, 221, 135, 38, 194, 248, 121, 96, 85, 29,
+    },
+    .partition_prob{
+        199, 122, 141, 0, 147, 63, 159, 0, 148, 133, 118, 0, 121, 104, 114, 0,
+        174, 73,  87,  0, 92,  41, 83,  0, 82,  99,  50,  0, 53,  39,  39,  0,
+        177, 58,  59,  0, 68,  26, 63,  0, 52,  79,  25,  0, 17,  14,  12,  0,
+        222, 34,  30,  0, 72,  16, 44,  0, 58,  32,  12,  0, 10,  7,   6,   0,
+    },
+    .coef_probs{
+        195, 29,  183, 0, 84,  49,  136, 0, 8,   42,  71,  0, 0,   0,   0,   0, 0,   0,   0,   0,
+        0,   0,   0,   0, 31,  107, 169, 0, 35,  99,  159, 0, 17,  82,  140, 0, 8,   66,  114, 0,
+        2,   44,  76,  0, 1,   19,  32,  0, 40,  132, 201, 0, 29,  114, 187, 0, 13,  91,  157, 0,
+        7,   75,  127, 0, 3,   58,  95,  0, 1,   28,  47,  0, 69,  142, 221, 0, 42,  122, 201, 0,
+        15,  91,  159, 0, 6,   67,  121, 0, 1,   42,  77,  0, 1,   17,  31,  0, 102, 148, 228, 0,
+        67,  117, 204, 0, 17,  82,  154, 0, 6,   59,  114, 0, 2,   39,  75,  0, 1,   15,  29,  0,
+        156, 57,  233, 0, 119, 57,  212, 0, 58,  48,  163, 0, 29,  40,  124, 0, 12,  30,  81,  0,
+        3,   12,  31,  0, 191, 107, 226, 0, 124, 117, 204, 0, 25,  99,  155, 0, 0,   0,   0,   0,
+        0,   0,   0,   0, 0,   0,   0,   0, 29,  148, 210, 0, 37,  126, 194, 0, 8,   93,  157, 0,
+        2,   68,  118, 0, 1,   39,  69,  0, 1,   17,  33,  0, 41,  151, 213, 0, 27,  123, 193, 0,
+        3,   82,  144, 0, 1,   58,  105, 0, 1,   32,  60,  0, 1,   13,  26,  0, 59,  159, 220, 0,
+        23,  126, 198, 0, 4,   88,  151, 0, 1,   66,  114, 0, 1,   38,  71,  0, 1,   18,  34,  0,
+        114, 136, 232, 0, 51,  114, 207, 0, 11,  83,  155, 0, 3,   56,  105, 0, 1,   33,  65,  0,
+        1,   17,  34,  0, 149, 65,  234, 0, 121, 57,  215, 0, 61,  49,  166, 0, 28,  36,  114, 0,
+        12,  25,  76,  0, 3,   16,  42,  0, 214, 49,  220, 0, 132, 63,  188, 0, 42,  65,  137, 0,
+        0,   0,   0,   0, 0,   0,   0,   0, 0,   0,   0,   0, 85,  137, 221, 0, 104, 131, 216, 0,
+        49,  111, 192, 0, 21,  87,  155, 0, 2,   49,  87,  0, 1,   16,  28,  0, 89,  163, 230, 0,
+        90,  137, 220, 0, 29,  100, 183, 0, 10,  70,  135, 0, 2,   42,  81,  0, 1,   17,  33,  0,
+        108, 167, 237, 0, 55,  133, 222, 0, 15,  97,  179, 0, 4,   72,  135, 0, 1,   45,  85,  0,
+        1,   19,  38,  0, 124, 146, 240, 0, 66,  124, 224, 0, 17,  88,  175, 0, 4,   58,  122, 0,
+        1,   36,  75,  0, 1,   18,  37,  0, 141, 79,  241, 0, 126, 70,  227, 0, 66,  58,  182, 0,
+        30,  44,  136, 0, 12,  34,  96,  0, 2,   20,  47,  0, 229, 99,  249, 0, 143, 111, 235, 0,
+        46,  109, 192, 0, 0,   0,   0,   0, 0,   0,   0,   0, 0,   0,   0,   0, 82,  158, 236, 0,
+        94,  146, 224, 0, 25,  117, 191, 0, 9,   87,  149, 0, 3,   56,  99,  0, 1,   33,  57,  0,
+        83,  167, 237, 0, 68,  145, 222, 0, 10,  103, 177, 0, 2,   72,  131, 0, 1,   41,  79,  0,
+        1,   20,  39,  0, 99,  167, 239, 0, 47,  141, 224, 0, 10,  104, 178, 0, 2,   73,  133, 0,
+        1,   44,  85,  0, 1,   22,  47,  0, 127, 145, 243, 0, 71,  129, 228, 0, 17,  93,  177, 0,
+        3,   61,  124, 0, 1,   41,  84,  0, 1,   21,  52,  0, 157, 78,  244, 0, 140, 72,  231, 0,
+        69,  58,  184, 0, 31,  44,  137, 0, 14,  38,  105, 0, 8,   23,  61,  0, 125, 34,  187, 0,
+        52,  41,  133, 0, 6,   31,  56,  0, 0,   0,   0,   0, 0,   0,   0,   0, 0,   0,   0,   0,
+        37,  109, 153, 0, 51,  102, 147, 0, 23,  87,  128, 0, 8,   67,  101, 0, 1,   41,  63,  0,
+        1,   19,  29,  0, 31,  154, 185, 0, 17,  127, 175, 0, 6,   96,  145, 0, 2,   73,  114, 0,
+        1,   51,  82,  0, 1,   28,  45,  0, 23,  163, 200, 0, 10,  131, 185, 0, 2,   93,  148, 0,
+        1,   67,  111, 0, 1,   41,  69,  0, 1,   14,  24,  0, 29,  176, 217, 0, 12,  145, 201, 0,
+        3,   101, 156, 0, 1,   69,  111, 0, 1,   39,  63,  0, 1,   14,  23,  0, 57,  192, 233, 0,
+        25,  154, 215, 0, 6,   109, 167, 0, 3,   78,  118, 0, 1,   48,  69,  0, 1,   21,  29,  0,
+        202, 105, 245, 0, 108, 106, 216, 0, 18,  90,  144, 0, 0,   0,   0,   0, 0,   0,   0,   0,
+        0,   0,   0,   0, 33,  172, 219, 0, 64,  149, 206, 0, 14,  117, 177, 0, 5,   90,  141, 0,
+        2,   61,  95,  0, 1,   37,  57,  0, 33,  179, 220, 0, 11,  140, 198, 0, 1,   89,  148, 0,
+        1,   60,  104, 0, 1,   33,  57,  0, 1,   12,  21,  0, 30,  181, 221, 0, 8,   141, 198, 0,
+        1,   87,  145, 0, 1,   58,  100, 0, 1,   31,  55,  0, 1,   12,  20,  0, 32,  186, 224, 0,
+        7,   142, 198, 0, 1,   86,  143, 0, 1,   58,  100, 0, 1,   31,  55,  0, 1,   12,  22,  0,
+        57,  192, 227, 0, 20,  143, 204, 0, 3,   96,  154, 0, 1,   68,  112, 0, 1,   42,  69,  0,
+        1,   19,  32,  0, 212, 35,  215, 0, 113, 47,  169, 0, 29,  48,  105, 0, 0,   0,   0,   0,
+        0,   0,   0,   0, 0,   0,   0,   0, 74,  129, 203, 0, 106, 120, 203, 0, 49,  107, 178, 0,
+        19,  84,  144, 0, 4,   50,  84,  0, 1,   15,  25,  0, 71,  172, 217, 0, 44,  141, 209, 0,
+        15,  102, 173, 0, 6,   76,  133, 0, 2,   51,  89,  0, 1,   24,  42,  0, 64,  185, 231, 0,
+        31,  148, 216, 0, 8,   103, 175, 0, 3,   74,  131, 0, 1,   46,  81,  0, 1,   18,  30,  0,
+        65,  196, 235, 0, 25,  157, 221, 0, 5,   105, 174, 0, 1,   67,  120, 0, 1,   38,  69,  0,
+        1,   15,  30,  0, 65,  204, 238, 0, 30,  156, 224, 0, 7,   107, 177, 0, 2,   70,  124, 0,
+        1,   42,  73,  0, 1,   18,  34,  0, 225, 86,  251, 0, 144, 104, 235, 0, 42,  99,  181, 0,
+        0,   0,   0,   0, 0,   0,   0,   0, 0,   0,   0,   0, 85,  175, 239, 0, 112, 165, 229, 0,
+        29,  136, 200, 0, 12,  103, 162, 0, 6,   77,  123, 0, 2,   53,  84,  0, 75,  183, 239, 0,
+        30,  155, 221, 0, 3,   106, 171, 0, 1,   74,  128, 0, 1,   44,  76,  0, 1,   17,  28,  0,
+        73,  185, 240, 0, 27,  159, 222, 0, 2,   107, 172, 0, 1,   75,  127, 0, 1,   42,  73,  0,
+        1,   17,  29,  0, 62,  190, 238, 0, 21,  159, 222, 0, 2,   107, 172, 0, 1,   72,  122, 0,
+        1,   40,  71,  0, 1,   18,  32,  0, 61,  199, 240, 0, 27,  161, 226, 0, 4,   113, 180, 0,
+        1,   76,  129, 0, 1,   46,  80,  0, 1,   23,  41,  0, 7,   27,  153, 0, 5,   30,  95,  0,
+        1,   16,  30,  0, 0,   0,   0,   0, 0,   0,   0,   0, 0,   0,   0,   0, 50,  75,  127, 0,
+        57,  75,  124, 0, 27,  67,  108, 0, 10,  54,  86,  0, 1,   33,  52,  0, 1,   12,  18,  0,
+        43,  125, 151, 0, 26,  108, 148, 0, 7,   83,  122, 0, 2,   59,  89,  0, 1,   38,  60,  0,
+        1,   17,  27,  0, 23,  144, 163, 0, 13,  112, 154, 0, 2,   75,  117, 0, 1,   50,  81,  0,
+        1,   31,  51,  0, 1,   14,  23,  0, 18,  162, 185, 0, 6,   123, 171, 0, 1,   78,  125, 0,
+        1,   51,  86,  0, 1,   31,  54,  0, 1,   14,  23,  0, 15,  199, 227, 0, 3,   150, 204, 0,
+        1,   91,  146, 0, 1,   55,  95,  0, 1,   30,  53,  0, 1,   11,  20,  0, 19,  55,  240, 0,
+        19,  59,  196, 0, 3,   52,  105, 0, 0,   0,   0,   0, 0,   0,   0,   0, 0,   0,   0,   0,
+        41,  166, 207, 0, 104, 153, 199, 0, 31,  123, 181, 0, 14,  101, 152, 0, 5,   72,  106, 0,
+        1,   36,  52,  0, 35,  176, 211, 0, 12,  131, 190, 0, 2,   88,  144, 0, 1,   60,  101, 0,
+        1,   36,  60,  0, 1,   16,  28,  0, 28,  183, 213, 0, 8,   134, 191, 0, 1,   86,  142, 0,
+        1,   56,  96,  0, 1,   30,  53,  0, 1,   12,  20,  0, 20,  190, 215, 0, 4,   135, 192, 0,
+        1,   84,  139, 0, 1,   53,  91,  0, 1,   28,  49,  0, 1,   11,  20,  0, 13,  196, 216, 0,
+        2,   137, 192, 0, 1,   86,  143, 0, 1,   57,  99,  0, 1,   32,  56,  0, 1,   13,  24,  0,
+        211, 29,  217, 0, 96,  47,  156, 0, 22,  43,  87,  0, 0,   0,   0,   0, 0,   0,   0,   0,
+        0,   0,   0,   0, 78,  120, 193, 0, 111, 116, 186, 0, 46,  102, 164, 0, 15,  80,  128, 0,
+        2,   49,  76,  0, 1,   18,  28,  0, 71,  161, 203, 0, 42,  132, 192, 0, 10,  98,  150, 0,
+        3,   69,  109, 0, 1,   44,  70,  0, 1,   18,  29,  0, 57,  186, 211, 0, 30,  140, 196, 0,
+        4,   93,  146, 0, 1,   62,  102, 0, 1,   38,  65,  0, 1,   16,  27,  0, 47,  199, 217, 0,
+        14,  145, 196, 0, 1,   88,  142, 0, 1,   57,  98,  0, 1,   36,  62,  0, 1,   15,  26,  0,
+        26,  219, 229, 0, 5,   155, 207, 0, 1,   94,  151, 0, 1,   60,  104, 0, 1,   36,  62,  0,
+        1,   16,  28,  0, 233, 29,  248, 0, 146, 47,  220, 0, 43,  52,  140, 0, 0,   0,   0,   0,
+        0,   0,   0,   0, 0,   0,   0,   0, 100, 163, 232, 0, 179, 161, 222, 0, 63,  142, 204, 0,
+        37,  113, 174, 0, 26,  89,  137, 0, 18,  68,  97,  0, 85,  181, 230, 0, 32,  146, 209, 0,
+        7,   100, 164, 0, 3,   71,  121, 0, 1,   45,  77,  0, 1,   18,  30,  0, 65,  187, 230, 0,
+        20,  148, 207, 0, 2,   97,  159, 0, 1,   68,  116, 0, 1,   40,  70,  0, 1,   14,  29,  0,
+        40,  194, 227, 0, 8,   147, 204, 0, 1,   94,  155, 0, 1,   65,  112, 0, 1,   39,  66,  0,
+        1,   14,  26,  0, 16,  208, 228, 0, 3,   151, 207, 0, 1,   98,  160, 0, 1,   67,  117, 0,
+        1,   41,  74,  0, 1,   17,  31,  0, 17,  38,  140, 0, 7,   34,  80,  0, 1,   17,  29,  0,
+        0,   0,   0,   0, 0,   0,   0,   0, 0,   0,   0,   0, 37,  75,  128, 0, 41,  76,  128, 0,
+        26,  66,  116, 0, 12,  52,  94,  0, 2,   32,  55,  0, 1,   10,  16,  0, 50,  127, 154, 0,
+        37,  109, 152, 0, 16,  82,  121, 0, 5,   59,  85,  0, 1,   35,  54,  0, 1,   13,  20,  0,
+        40,  142, 167, 0, 17,  110, 157, 0, 2,   71,  112, 0, 1,   44,  72,  0, 1,   27,  45,  0,
+        1,   11,  17,  0, 30,  175, 188, 0, 9,   124, 169, 0, 1,   74,  116, 0, 1,   48,  78,  0,
+        1,   30,  49,  0, 1,   11,  18,  0, 10,  222, 223, 0, 2,   150, 194, 0, 1,   83,  128, 0,
+        1,   48,  79,  0, 1,   27,  45,  0, 1,   11,  17,  0, 36,  41,  235, 0, 29,  36,  193, 0,
+        10,  27,  111, 0, 0,   0,   0,   0, 0,   0,   0,   0, 0,   0,   0,   0, 85,  165, 222, 0,
+        177, 162, 215, 0, 110, 135, 195, 0, 57,  113, 168, 0, 23,  83,  120, 0, 10,  49,  61,  0,
+        85,  190, 223, 0, 36,  139, 200, 0, 5,   90,  146, 0, 1,   60,  103, 0, 1,   38,  65,  0,
+        1,   18,  30,  0, 72,  202, 223, 0, 23,  141, 199, 0, 2,   86,  140, 0, 1,   56,  97,  0,
+        1,   36,  61,  0, 1,   16,  27,  0, 55,  218, 225, 0, 13,  145, 200, 0, 1,   86,  141, 0,
+        1,   57,  99,  0, 1,   35,  61,  0, 1,   13,  22,  0, 15,  235, 212, 0, 1,   132, 184, 0,
+        1,   84,  139, 0, 1,   57,  97,  0, 1,   34,  56,  0, 1,   14,  23,  0, 181, 21,  201, 0,
+        61,  37,  123, 0, 10,  38,  71,  0, 0,   0,   0,   0, 0,   0,   0,   0, 0,   0,   0,   0,
+        47,  106, 172, 0, 95,  104, 173, 0, 42,  93,  159, 0, 18,  77,  131, 0, 4,   50,  81,  0,
+        1,   17,  23,  0, 62,  147, 199, 0, 44,  130, 189, 0, 28,  102, 154, 0, 18,  75,  115, 0,
+        2,   44,  65,  0, 1,   12,  19,  0, 55,  153, 210, 0, 24,  130, 194, 0, 3,   93,  146, 0,
+        1,   61,  97,  0, 1,   31,  50,  0, 1,   10,  16,  0, 49,  186, 223, 0, 17,  148, 204, 0,
+        1,   96,  142, 0, 1,   53,  83,  0, 1,   26,  44,  0, 1,   11,  17,  0, 13,  217, 212, 0,
+        2,   136, 180, 0, 1,   78,  124, 0, 1,   50,  83,  0, 1,   29,  49,  0, 1,   14,  23,  0,
+        197, 13,  247, 0, 82,  17,  222, 0, 25,  17,  162, 0, 0,   0,   0,   0, 0,   0,   0,   0,
+        0,   0,   0,   0, 126, 186, 247, 0, 234, 191, 243, 0, 176, 177, 234, 0, 104, 158, 220, 0,
+        66,  128, 186, 0, 55,  90,  137, 0, 111, 197, 242, 0, 46,  158, 219, 0, 9,   104, 171, 0,
+        2,   65,  125, 0, 1,   44,  80,  0, 1,   17,  91,  0, 104, 208, 245, 0, 39,  168, 224, 0,
+        3,   109, 162, 0, 1,   79,  124, 0, 1,   50,  102, 0, 1,   43,  102, 0, 84,  220, 246, 0,
+        31,  177, 231, 0, 2,   115, 180, 0, 1,   79,  134, 0, 1,   55,  77,  0, 1,   60,  79,  0,
+        43,  243, 240, 0, 8,   180, 217, 0, 1,   115, 166, 0, 1,   84,  121, 0, 1,   51,  67,  0,
+        1,   16,  6,   0,
+    },
+    .switchable_interp_prob{235, 162, 36, 255, 34, 3, 149, 144},
+    .inter_mode_prob{
+        2,  173, 34, 0,  7,  145, 85, 0,  7,  166, 63, 0,  7,  94,
+        66, 0,   8,  64, 46, 0,   17, 81, 31, 0,   25, 29, 30, 0,
+    },
+    .intra_inter_prob{9, 102, 187, 225},
+    .comp_inter_prob{9, 102, 187, 225, 0},
+    .single_ref_prob{33, 16, 77, 74, 142, 142, 172, 170, 238, 247},
+    .comp_ref_prob{50, 126, 123, 221, 226},
+    .tx_32x32_prob{3, 136, 37, 5, 52, 13},
+    .tx_16x16_prob{20, 152, 15, 101},
+    .tx_8x8_prob{100, 66},
+    .skip_probs{192, 128, 64},
+    .joints{32, 64, 96},
+    .sign{128, 128},
+    .classes{
+        224, 144, 192, 168, 192, 176, 192, 198, 198, 245,
+        216, 128, 176, 160, 176, 176, 192, 198, 198, 208,
+    },
+    .class_0{216, 208},
+    .prob_bits{
+        136, 140, 148, 160, 176, 192, 224, 234, 234, 240,
+        136, 140, 148, 160, 176, 192, 224, 234, 234, 240,
+    },
+    .class_0_fr{128, 128, 64, 96, 112, 64, 128, 128, 64, 96, 112, 64},
+    .fr{64, 96, 64, 64, 96, 64},
+    .class_0_hp{160, 160},
+    .high_precision{128, 128},
+};
+
+VP9::VP9(GPU& gpu) : gpu(gpu) {}
+
+VP9::~VP9() = default;
+
+void VP9::WriteProbabilityUpdate(VpxRangeEncoder& writer, u8 new_prob, u8 old_prob) {
+    const bool update = new_prob != old_prob;
+
+    writer.Write(update, diff_update_probability);
+
+    if (update) {
+        WriteProbabilityDelta(writer, new_prob, old_prob);
+    }
+}
+template <typename T, std::size_t N>
+void VP9::WriteProbabilityUpdate(VpxRangeEncoder& writer, const std::array<T, N>& new_prob,
+                                 const std::array<T, N>& old_prob) {
+    for (std::size_t offset = 0; offset < new_prob.size(); ++offset) {
+        WriteProbabilityUpdate(writer, new_prob[offset], old_prob[offset]);
+    }
+}
+
+template <typename T, std::size_t N>
+void VP9::WriteProbabilityUpdateAligned4(VpxRangeEncoder& writer, const std::array<T, N>& new_prob,
+                                         const std::array<T, N>& old_prob) {
+    for (std::size_t offset = 0; offset < new_prob.size(); offset += 4) {
+        WriteProbabilityUpdate(writer, new_prob[offset + 0], old_prob[offset + 0]);
+        WriteProbabilityUpdate(writer, new_prob[offset + 1], old_prob[offset + 1]);
+        WriteProbabilityUpdate(writer, new_prob[offset + 2], old_prob[offset + 2]);
+    }
+}
+
+void VP9::WriteProbabilityDelta(VpxRangeEncoder& writer, u8 new_prob, u8 old_prob) {
+    const int delta = RemapProbability(new_prob, old_prob);
+
+    EncodeTermSubExp(writer, delta);
+}
+
+s32 VP9::RemapProbability(s32 new_prob, s32 old_prob) {
+    new_prob--;
+    old_prob--;
+
+    std::size_t index{};
+
+    if (old_prob * 2 <= 0xff) {
+        index = static_cast<std::size_t>(std::max(0, RecenterNonNeg(new_prob, old_prob) - 1));
+    } else {
+        index = static_cast<std::size_t>(
+            std::max(0, RecenterNonNeg(0xff - 1 - new_prob, 0xff - 1 - old_prob) - 1));
+    }
+
+    return map_lut[index];
+}
+
+s32 VP9::RecenterNonNeg(s32 new_prob, s32 old_prob) {
+    if (new_prob > old_prob * 2) {
+        return new_prob;
+    } else if (new_prob >= old_prob) {
+        return (new_prob - old_prob) * 2;
+    } else {
+        return (old_prob - new_prob) * 2 - 1;
+    }
+}
+
+void VP9::EncodeTermSubExp(VpxRangeEncoder& writer, s32 value) {
+    if (WriteLessThan(writer, value, 16)) {
+        writer.Write(value, 4);
+    } else if (WriteLessThan(writer, value, 32)) {
+        writer.Write(value - 16, 4);
+    } else if (WriteLessThan(writer, value, 64)) {
+        writer.Write(value - 32, 5);
+    } else {
+        value -= 64;
+
+        constexpr s32 size = 8;
+
+        const s32 mask = (1 << size) - 191;
+
+        const s32 delta = value - mask;
+
+        if (delta < 0) {
+            writer.Write(value, size - 1);
+        } else {
+            writer.Write(delta / 2 + mask, size - 1);
+            writer.Write(delta & 1, 1);
+        }
+    }
+}
+
+bool VP9::WriteLessThan(VpxRangeEncoder& writer, s32 value, s32 test) {
+    const bool is_lt = value < test;
+    writer.Write(!is_lt);
+    return is_lt;
+}
+
+void VP9::WriteCoefProbabilityUpdate(VpxRangeEncoder& writer, s32 tx_mode,
+                                     const std::array<u8, 2304>& new_prob,
+                                     const std::array<u8, 2304>& old_prob) {
+    // Note: There's 1 byte added on each packet for alignment,
+    // this byte is ignored when doing updates.
+    constexpr s32 block_bytes = 2 * 2 * 6 * 6 * 4;
+
+    const auto needs_update = [&](s32 base_index) -> bool {
+        s32 index = base_index;
+        for (s32 i = 0; i < 2; i++) {
+            for (s32 j = 0; j < 2; j++) {
+                for (s32 k = 0; k < 6; k++) {
+                    for (s32 l = 0; l < 6; l++) {
+                        if (new_prob[index + 0] != old_prob[index + 0] ||
+                            new_prob[index + 1] != old_prob[index + 1] ||
+                            new_prob[index + 2] != old_prob[index + 2]) {
+                            return true;
+                        }
+
+                        index += 4;
+                    }
+                }
+            }
+        }
+        return false;
+    };
+
+    for (s32 block_index = 0; block_index < 4; block_index++) {
+        const s32 base_index = block_index * block_bytes;
+        const bool update = needs_update(base_index);
+        writer.Write(update);
+
+        if (update) {
+            s32 index = base_index;
+            for (s32 i = 0; i < 2; i++) {
+                for (s32 j = 0; j < 2; j++) {
+                    for (s32 k = 0; k < 6; k++) {
+                        for (s32 l = 0; l < 6; l++) {
+                            if (k != 0 || l < 3) {
+                                WriteProbabilityUpdate(writer, new_prob[index + 0],
+                                                       old_prob[index + 0]);
+                                WriteProbabilityUpdate(writer, new_prob[index + 1],
+                                                       old_prob[index + 1]);
+                                WriteProbabilityUpdate(writer, new_prob[index + 2],
+                                                       old_prob[index + 2]);
+                            }
+                            index += 4;
+                        }
+                    }
+                }
+            }
+        }
+
+        if (block_index == tx_mode) {
+            break;
+        }
+    }
+}
+
+void VP9::WriteMvProbabilityUpdate(VpxRangeEncoder& writer, u8 new_prob, u8 old_prob) {
+    const bool update = new_prob != old_prob;
+    writer.Write(update, diff_update_probability);
+
+    if (update) {
+        writer.Write(new_prob >> 1, 7);
+    }
+}
+
+s32 VP9::CalcMinLog2TileCols(s32 frame_width) {
+    const s32 sb64_cols = (frame_width + 63) / 64;
+    s32 min_log2 = 0;
+
+    while ((64 << min_log2) < sb64_cols) {
+        min_log2++;
+    }
+
+    return min_log2;
+}
+
+s32 VP9::CalcMaxLog2TileCols(s32 frameWidth) {
+    const s32 sb64_cols = (frameWidth + 63) / 64;
+    s32 max_log2 = 1;
+
+    while ((sb64_cols >> max_log2) >= 4) {
+        max_log2++;
+    }
+
+    return max_log2 - 1;
+}
+
+Vp9PictureInfo VP9::GetVp9PictureInfo(const NvdecCommon::NvdecRegisters& state) {
+    PictureInfo picture_info{};
+    gpu.MemoryManager().ReadBlock(state.picture_info_offset, &picture_info, sizeof(PictureInfo));
+    Vp9PictureInfo vp9_info = picture_info.Convert();
+
+    InsertEntropy(state.vp9_entropy_probs_offset, vp9_info.entropy);
+
+    // surface_luma_offset[0:3] contains the address of the reference frame offsets in the following
+    // order: last, golden, altref, current. It may be worthwhile to track the updates done here
+    // to avoid buffering frame data needed for reference frame updating in the header composition.
+    std::memcpy(vp9_info.frame_offsets.data(), state.surface_luma_offset.data(), 4 * sizeof(u64));
+
+    return std::move(vp9_info);
+}
+
+void VP9::InsertEntropy(u64 offset, Vp9EntropyProbs& dst) {
+    EntropyProbs entropy{};
+    gpu.MemoryManager().ReadBlock(offset, &entropy, sizeof(EntropyProbs));
+    entropy.Convert(dst);
+}
+
+Vp9FrameContainer VP9::GetCurrentFrame(const NvdecCommon::NvdecRegisters& state) {
+    Vp9FrameContainer frame{};
+    {
+        gpu.SyncGuestHost();
+        frame.info = std::move(GetVp9PictureInfo(state));
+
+        frame.bit_stream.resize(frame.info.bitstream_size);
+        gpu.MemoryManager().ReadBlock(state.frame_bitstream_offset, frame.bit_stream.data(),
+                                      frame.info.bitstream_size);
+    }
+    // Buffer two frames, saving the last show frame info
+    if (next_next_frame.bit_stream.size() != 0) {
+        Vp9FrameContainer temp{
+            .info = frame.info,
+            .bit_stream = frame.bit_stream,
+        };
+        next_next_frame.info.show_frame = frame.info.last_frame_shown;
+        frame.info = next_next_frame.info;
+        frame.bit_stream = next_next_frame.bit_stream;
+        next_next_frame = std::move(temp);
+
+        if (next_frame.bit_stream.size() != 0) {
+            Vp9FrameContainer temp{
+                .info = frame.info,
+                .bit_stream = frame.bit_stream,
+            };
+            next_frame.info.show_frame = frame.info.last_frame_shown;
+            frame.info = next_frame.info;
+            frame.bit_stream = next_frame.bit_stream;
+            next_frame = std::move(temp);
+        } else {
+            next_frame.info = frame.info;
+            next_frame.bit_stream = frame.bit_stream;
+        }
+    } else {
+        next_next_frame.info = frame.info;
+        next_next_frame.bit_stream = frame.bit_stream;
+    }
+    return frame;
+}
+
+std::vector<u8> VP9::ComposeCompressedHeader() {
+    VpxRangeEncoder writer{};
+
+    if (!current_frame_info.lossless) {
+        if (static_cast<u32>(current_frame_info.transform_mode) >= 3) {
+            writer.Write(3, 2);
+            writer.Write(current_frame_info.transform_mode == 4);
+        } else {
+            writer.Write(current_frame_info.transform_mode, 2);
+        }
+    }
+
+    if (current_frame_info.transform_mode == 4) {
+        // tx_mode_probs() in the spec
+        WriteProbabilityUpdate(writer, current_frame_info.entropy.tx_8x8_prob,
+                               prev_frame_probs.tx_8x8_prob);
+        WriteProbabilityUpdate(writer, current_frame_info.entropy.tx_16x16_prob,
+                               prev_frame_probs.tx_16x16_prob);
+        WriteProbabilityUpdate(writer, current_frame_info.entropy.tx_32x32_prob,
+                               prev_frame_probs.tx_32x32_prob);
+        if (current_frame_info.show_frame && !current_frame_info.is_key_frame) {
+            prev_frame_probs.tx_8x8_prob = current_frame_info.entropy.tx_8x8_prob;
+            prev_frame_probs.tx_16x16_prob = current_frame_info.entropy.tx_16x16_prob;
+            prev_frame_probs.tx_32x32_prob = current_frame_info.entropy.tx_32x32_prob;
+        }
+    }
+    // read_coef_probs()  in the spec
+    WriteCoefProbabilityUpdate(writer, current_frame_info.transform_mode,
+                               current_frame_info.entropy.coef_probs, prev_frame_probs.coef_probs);
+    // read_skip_probs()  in the spec
+    WriteProbabilityUpdate(writer, current_frame_info.entropy.skip_probs,
+                           prev_frame_probs.skip_probs);
+
+    if (current_frame_info.show_frame && !current_frame_info.is_key_frame) {
+        prev_frame_probs.coef_probs = current_frame_info.entropy.coef_probs;
+        prev_frame_probs.skip_probs = current_frame_info.entropy.skip_probs;
+    }
+
+    if (!current_frame_info.intra_only) {
+        // read_inter_probs() in the spec
+        WriteProbabilityUpdateAligned4(writer, current_frame_info.entropy.inter_mode_prob,
+                                       prev_frame_probs.inter_mode_prob);
+        if (current_frame_info.show_frame && !current_frame_info.is_key_frame) {
+            prev_frame_probs.inter_mode_prob = current_frame_info.entropy.inter_mode_prob;
+        }
+
+        if (current_frame_info.interp_filter == 4) {
+            // read_interp_filter_probs() in the spec
+            WriteProbabilityUpdate(writer, current_frame_info.entropy.switchable_interp_prob,
+                                   prev_frame_probs.switchable_interp_prob);
+            if (current_frame_info.show_frame && !current_frame_info.is_key_frame) {
+                prev_frame_probs.switchable_interp_prob =
+                    current_frame_info.entropy.switchable_interp_prob;
+            }
+        }
+
+        // read_is_inter_probs() in the spec
+        WriteProbabilityUpdate(writer, current_frame_info.entropy.intra_inter_prob,
+                               prev_frame_probs.intra_inter_prob);
+        if (current_frame_info.show_frame && !current_frame_info.is_key_frame) {
+            prev_frame_probs.intra_inter_prob = current_frame_info.entropy.intra_inter_prob;
+        }
+        // frame_reference_mode() in the spec
+        if ((current_frame_info.ref_frame_sign_bias[1] & 1) !=
+                (current_frame_info.ref_frame_sign_bias[2] & 1) ||
+            (current_frame_info.ref_frame_sign_bias[1] & 1) !=
+                (current_frame_info.ref_frame_sign_bias[3] & 1)) {
+            if (current_frame_info.reference_mode >= 1) {
+                writer.Write(1, 1);
+                writer.Write(current_frame_info.reference_mode == 2);
+            } else {
+                writer.Write(0, 1);
+            }
+        }
+
+        // frame_reference_mode_probs() in the spec
+        if (current_frame_info.reference_mode == 2) {
+            WriteProbabilityUpdate(writer, current_frame_info.entropy.comp_inter_prob,
+                                   prev_frame_probs.comp_inter_prob);
+            if (current_frame_info.show_frame && !current_frame_info.is_key_frame) {
+                prev_frame_probs.comp_inter_prob = current_frame_info.entropy.comp_inter_prob;
+            }
+        }
+
+        if (current_frame_info.reference_mode != 1) {
+            WriteProbabilityUpdate(writer, current_frame_info.entropy.single_ref_prob,
+                                   prev_frame_probs.single_ref_prob);
+            if (current_frame_info.show_frame && !current_frame_info.is_key_frame) {
+                prev_frame_probs.single_ref_prob = current_frame_info.entropy.single_ref_prob;
+            }
+        }
+
+        if (current_frame_info.reference_mode != 0) {
+            WriteProbabilityUpdate(writer, current_frame_info.entropy.comp_ref_prob,
+                                   prev_frame_probs.comp_ref_prob);
+            if (current_frame_info.show_frame && !current_frame_info.is_key_frame) {
+                prev_frame_probs.comp_ref_prob = current_frame_info.entropy.comp_ref_prob;
+            }
+        }
+
+        // read_y_mode_probs
+        for (std::size_t index = 0; index < current_frame_info.entropy.y_mode_prob.size();
+             ++index) {
+            WriteProbabilityUpdate(writer, current_frame_info.entropy.y_mode_prob[index],
+                                   prev_frame_probs.y_mode_prob[index]);
+        }
+        if (current_frame_info.show_frame && !current_frame_info.is_key_frame) {
+            prev_frame_probs.y_mode_prob = current_frame_info.entropy.y_mode_prob;
+        }
+        // read_partition_probs
+        WriteProbabilityUpdateAligned4(writer, current_frame_info.entropy.partition_prob,
+                                       prev_frame_probs.partition_prob);
+        if (current_frame_info.show_frame && !current_frame_info.is_key_frame) {
+            prev_frame_probs.partition_prob = current_frame_info.entropy.partition_prob;
+        }
+
+        // mv_probs
+        for (s32 i = 0; i < 3; i++) {
+            WriteMvProbabilityUpdate(writer, current_frame_info.entropy.joints[i],
+                                     prev_frame_probs.joints[i]);
+        }
+        if (current_frame_info.show_frame && !current_frame_info.is_key_frame) {
+            prev_frame_probs.joints = current_frame_info.entropy.joints;
+        }
+
+        for (s32 i = 0; i < 2; i++) {
+            WriteMvProbabilityUpdate(writer, current_frame_info.entropy.sign[i],
+                                     prev_frame_probs.sign[i]);
+
+            for (s32 j = 0; j < 10; j++) {
+                const int index = i * 10 + j;
+
+                WriteMvProbabilityUpdate(writer, current_frame_info.entropy.classes[index],
+                                         prev_frame_probs.classes[index]);
+            }
+
+            WriteMvProbabilityUpdate(writer, current_frame_info.entropy.class_0[i],
+                                     prev_frame_probs.class_0[i]);
+
+            for (s32 j = 0; j < 10; j++) {
+                const int index = i * 10 + j;
+
+                WriteMvProbabilityUpdate(writer, current_frame_info.entropy.prob_bits[index],
+                                         prev_frame_probs.prob_bits[index]);
+            }
+        }
+
+        for (s32 i = 0; i < 2; i++) {
+            for (s32 j = 0; j < 2; j++) {
+                for (s32 k = 0; k < 3; k++) {
+                    const int index = i * 2 * 3 + j * 3 + k;
+
+                    WriteMvProbabilityUpdate(writer, current_frame_info.entropy.class_0_fr[index],
+                                             prev_frame_probs.class_0_fr[index]);
+                }
+            }
+
+            for (s32 j = 0; j < 3; j++) {
+                const int index = i * 3 + j;
+
+                WriteMvProbabilityUpdate(writer, current_frame_info.entropy.fr[index],
+                                         prev_frame_probs.fr[index]);
+            }
+        }
+
+        if (current_frame_info.allow_high_precision_mv) {
+            for (s32 index = 0; index < 2; index++) {
+                WriteMvProbabilityUpdate(writer, current_frame_info.entropy.class_0_hp[index],
+                                         prev_frame_probs.class_0_hp[index]);
+                WriteMvProbabilityUpdate(writer, current_frame_info.entropy.high_precision[index],
+                                         prev_frame_probs.high_precision[index]);
+            }
+        }
+
+        // save previous probs
+        if (current_frame_info.show_frame && !current_frame_info.is_key_frame) {
+            prev_frame_probs.sign = current_frame_info.entropy.sign;
+            prev_frame_probs.classes = current_frame_info.entropy.classes;
+            prev_frame_probs.class_0 = current_frame_info.entropy.class_0;
+            prev_frame_probs.prob_bits = current_frame_info.entropy.prob_bits;
+            prev_frame_probs.class_0_fr = current_frame_info.entropy.class_0_fr;
+            prev_frame_probs.fr = current_frame_info.entropy.fr;
+            prev_frame_probs.class_0_hp = current_frame_info.entropy.class_0_hp;
+            prev_frame_probs.high_precision = current_frame_info.entropy.high_precision;
+        }
+    }
+
+    writer.End();
+    return writer.GetBuffer();
+
+    const auto writer_bytearray = writer.GetBuffer();
+
+    std::vector<u8> compressed_header(writer_bytearray.size());
+    std::memcpy(compressed_header.data(), writer_bytearray.data(), writer_bytearray.size());
+    return compressed_header;
+}
+
+VpxBitStreamWriter VP9::ComposeUncompressedHeader() {
+    VpxBitStreamWriter uncomp_writer{};
+
+    uncomp_writer.WriteU(2, 2);                                      // Frame marker.
+    uncomp_writer.WriteU(0, 2);                                      // Profile.
+    uncomp_writer.WriteBit(false);                                   // Show existing frame.
+    uncomp_writer.WriteBit(!current_frame_info.is_key_frame);        // is key frame?
+    uncomp_writer.WriteBit(current_frame_info.show_frame);           // show frame?
+    uncomp_writer.WriteBit(current_frame_info.error_resilient_mode); // error reslience
+
+    if (current_frame_info.is_key_frame) {
+        uncomp_writer.WriteU(frame_sync_code, 24);
+        uncomp_writer.WriteU(0, 3); // Color space.
+        uncomp_writer.WriteU(0, 1); // Color range.
+        uncomp_writer.WriteU(current_frame_info.frame_size.width - 1, 16);
+        uncomp_writer.WriteU(current_frame_info.frame_size.height - 1, 16);
+        uncomp_writer.WriteBit(false); // Render and frame size different.
+
+        // Reset context
+        prev_frame_probs = default_probs;
+        swap_next_golden = false;
+        loop_filter_ref_deltas.fill(0);
+        loop_filter_mode_deltas.fill(0);
+
+        // allow frames offsets to stabilize before checking for golden frames
+        grace_period = 4;
+
+        // On key frames, all frame slots are set to the current frame,
+        // so the value of the selected slot doesn't really matter.
+        frame_ctxs.fill({current_frame_number, false, default_probs});
+
+        // intra only, meaning the frame can be recreated with no other references
+        current_frame_info.intra_only = true;
+
+    } else {
+        std::array<s32, 3> ref_frame_index;
+
+        if (!current_frame_info.show_frame) {
+            uncomp_writer.WriteBit(current_frame_info.intra_only);
+            if (!current_frame_info.last_frame_was_key) {
+                swap_next_golden = !swap_next_golden;
+            }
+        } else {
+            current_frame_info.intra_only = false;
+        }
+        if (!current_frame_info.error_resilient_mode) {
+            uncomp_writer.WriteU(0, 2); // Reset frame context.
+        }
+
+        // Last, Golden, Altref frames
+        ref_frame_index = std::array<s32, 3>{0, 1, 2};
+
+        // set when next frame is hidden
+        // altref and golden references are swapped
+        if (swap_next_golden) {
+            ref_frame_index = std::array<s32, 3>{0, 2, 1};
+        }
+
+        // update Last Frame
+        u64 refresh_frame_flags = 1;
+
+        // golden frame may refresh, determined if the next golden frame offset is changed
+        bool golden_refresh = false;
+        if (grace_period <= 0) {
+            for (s32 index = 1; index < 3; ++index) {
+                if (current_frame_info.frame_offsets[index] !=
+                    next_frame.info.frame_offsets[index]) {
+                    current_frame_info.refresh_frame[index] = true;
+                    golden_refresh = true;
+                    grace_period = 3;
+                }
+            }
+        }
+
+        if (current_frame_info.show_frame &&
+            (!next_frame.info.show_frame || next_frame.info.is_key_frame)) {
+            // Update golden frame
+            refresh_frame_flags = swap_next_golden ? 2 : 4;
+        }
+
+        if (!current_frame_info.show_frame) {
+            // Update altref
+            refresh_frame_flags = swap_next_golden ? 2 : 4;
+        } else if (golden_refresh) {
+            refresh_frame_flags = 3;
+        }
+
+        if (current_frame_info.intra_only) {
+            uncomp_writer.WriteU(frame_sync_code, 24);
+            uncomp_writer.WriteU(static_cast<s32>(refresh_frame_flags), 8);
+            uncomp_writer.WriteU(current_frame_info.frame_size.width - 1, 16);
+            uncomp_writer.WriteU(current_frame_info.frame_size.height - 1, 16);
+            uncomp_writer.WriteBit(false); // Render and frame size different.
+        } else {
+            uncomp_writer.WriteU(static_cast<s32>(refresh_frame_flags), 8);
+
+            for (s32 index = 1; index < 4; index++) {
+                uncomp_writer.WriteU(ref_frame_index[index - 1], 3);
+                uncomp_writer.WriteU(current_frame_info.ref_frame_sign_bias[index], 1);
+            }
+
+            uncomp_writer.WriteBit(true);  // Frame size with refs.
+            uncomp_writer.WriteBit(false); // Render and frame size different.
+            uncomp_writer.WriteBit(current_frame_info.allow_high_precision_mv);
+            uncomp_writer.WriteBit(current_frame_info.interp_filter == 4);
+
+            if (current_frame_info.interp_filter != 4) {
+                uncomp_writer.WriteU(current_frame_info.interp_filter, 2);
+            }
+        }
+    }
+
+    if (!current_frame_info.error_resilient_mode) {
+        uncomp_writer.WriteBit(true); // Refresh frame context. where do i get this info from?
+        uncomp_writer.WriteBit(true); // Frame parallel decoding mode.
+    }
+
+    int frame_ctx_idx = 0;
+    if (!current_frame_info.show_frame) {
+        frame_ctx_idx = 1;
+    }
+
+    uncomp_writer.WriteU(frame_ctx_idx, 2); // Frame context index.
+    prev_frame_probs =
+        frame_ctxs[frame_ctx_idx].probs; // reference probabilities for compressed header
+    frame_ctxs[frame_ctx_idx] = {current_frame_number, false, current_frame_info.entropy};
+
+    uncomp_writer.WriteU(current_frame_info.first_level, 6);
+    uncomp_writer.WriteU(current_frame_info.sharpness_level, 3);
+    uncomp_writer.WriteBit(current_frame_info.mode_ref_delta_enabled);
+
+    if (current_frame_info.mode_ref_delta_enabled) {
+        // check if ref deltas are different, update accordingly
+        std::array<bool, 4> update_loop_filter_ref_deltas;
+        std::array<bool, 2> update_loop_filter_mode_deltas;
+
+        bool loop_filter_delta_update = false;
+
+        for (std::size_t index = 0; index < current_frame_info.ref_deltas.size(); index++) {
+            const s8 old_deltas = loop_filter_ref_deltas[index];
+            const s8 new_deltas = current_frame_info.ref_deltas[index];
+
+            loop_filter_delta_update |=
+                (update_loop_filter_ref_deltas[index] = old_deltas != new_deltas);
+        }
+
+        for (std::size_t index = 0; index < current_frame_info.mode_deltas.size(); index++) {
+            const s8 old_deltas = loop_filter_mode_deltas[index];
+            const s8 new_deltas = current_frame_info.mode_deltas[index];
+
+            loop_filter_delta_update |=
+                (update_loop_filter_mode_deltas[index] = old_deltas != new_deltas);
+        }
+
+        uncomp_writer.WriteBit(loop_filter_delta_update);
+
+        if (loop_filter_delta_update) {
+            for (std::size_t index = 0; index < current_frame_info.ref_deltas.size(); index++) {
+                uncomp_writer.WriteBit(update_loop_filter_ref_deltas[index]);
+
+                if (update_loop_filter_ref_deltas[index]) {
+                    uncomp_writer.WriteS(current_frame_info.ref_deltas[index], 6);
+                }
+            }
+
+            for (std::size_t index = 0; index < current_frame_info.mode_deltas.size(); index++) {
+                uncomp_writer.WriteBit(update_loop_filter_mode_deltas[index]);
+
+                if (update_loop_filter_mode_deltas[index]) {
+                    uncomp_writer.WriteS(current_frame_info.mode_deltas[index], 6);
+                }
+            }
+            // save new deltas
+            loop_filter_ref_deltas = current_frame_info.ref_deltas;
+            loop_filter_mode_deltas = current_frame_info.mode_deltas;
+        }
+    }
+
+    uncomp_writer.WriteU(current_frame_info.base_q_index, 8);
+
+    uncomp_writer.WriteDeltaQ(current_frame_info.y_dc_delta_q);
+    uncomp_writer.WriteDeltaQ(current_frame_info.uv_dc_delta_q);
+    uncomp_writer.WriteDeltaQ(current_frame_info.uv_ac_delta_q);
+
+    uncomp_writer.WriteBit(false); // Segmentation enabled (TODO).
+
+    const s32 min_tile_cols_log2 = CalcMinLog2TileCols(current_frame_info.frame_size.width);
+    const s32 max_tile_cols_log2 = CalcMaxLog2TileCols(current_frame_info.frame_size.width);
+
+    const s32 tile_cols_log2_diff = current_frame_info.log2_tile_cols - min_tile_cols_log2;
+    const s32 tile_cols_log2_inc_mask = (1 << tile_cols_log2_diff) - 1;
+
+    // If it's less than the maximum, we need to add an extra 0 on the bitstream
+    // to indicate that it should stop reading.
+    if (current_frame_info.log2_tile_cols < max_tile_cols_log2) {
+        uncomp_writer.WriteU(tile_cols_log2_inc_mask << 1, tile_cols_log2_diff + 1);
+    } else {
+        uncomp_writer.WriteU(tile_cols_log2_inc_mask, tile_cols_log2_diff);
+    }
+
+    const bool tile_rows_log2_is_nonzero = current_frame_info.log2_tile_rows != 0;
+
+    uncomp_writer.WriteBit(tile_rows_log2_is_nonzero);
+
+    if (tile_rows_log2_is_nonzero) {
+        uncomp_writer.WriteBit(current_frame_info.log2_tile_rows > 1);
+    }
+
+    return uncomp_writer;
+}
+
+std::vector<u8>& VP9::ComposeFrameHeader(NvdecCommon::NvdecRegisters& state) {
+    std::vector<u8> bitstream;
+    {
+        Vp9FrameContainer curr_frame = GetCurrentFrame(state);
+        current_frame_info = curr_frame.info;
+        bitstream = curr_frame.bit_stream;
+    }
+
+    // The uncompressed header routine sets PrevProb parameters needed for the compressed header
+    auto uncomp_writer = ComposeUncompressedHeader();
+    std::vector<u8> compressed_header = ComposeCompressedHeader();
+
+    uncomp_writer.WriteU(static_cast<s32>(compressed_header.size()), 16);
+    uncomp_writer.Flush();
+    std::vector<u8> uncompressed_header = uncomp_writer.GetByteArray();
+
+    // Write headers and frame to buffer
+    frame.resize(uncompressed_header.size() + compressed_header.size() + bitstream.size());
+    std::memcpy(frame.data(), uncompressed_header.data(), uncompressed_header.size());
+    std::memcpy(frame.data() + uncompressed_header.size(), compressed_header.data(),
+                compressed_header.size());
+    std::memcpy(frame.data() + uncompressed_header.size() + compressed_header.size(),
+                bitstream.data(), bitstream.size());
+
+    // keep track of frame number
+    current_frame_number++;
+    grace_period--;
+
+    // don't display hidden frames
+    hidden = !current_frame_info.show_frame;
+    return frame;
+}
+
+VpxRangeEncoder::VpxRangeEncoder() {
+    Write(false);
+}
+
+VpxRangeEncoder::~VpxRangeEncoder() = default;
+
+void VpxRangeEncoder::Write(s32 value, s32 value_size) {
+    for (s32 bit = value_size - 1; bit >= 0; bit--) {
+        Write(((value >> bit) & 1) != 0);
+    }
+}
+
+void VpxRangeEncoder::Write(bool bit) {
+    Write(bit, half_probability);
+}
+
+void VpxRangeEncoder::Write(bool bit, s32 probability) {
+    u32 local_range = range;
+    const u32 split = 1 + (((local_range - 1) * static_cast<u32>(probability)) >> 8);
+    local_range = split;
+
+    if (bit) {
+        low_value += split;
+        local_range = range - split;
+    }
+
+    s32 shift = norm_lut[local_range];
+    local_range <<= shift;
+    count += shift;
+
+    if (count >= 0) {
+        const s32 offset = shift - count;
+
+        if (((low_value << (offset - 1)) >> 31) != 0) {
+            const s32 current_pos = static_cast<s32>(base_stream.GetPosition());
+            base_stream.Seek(-1, Common::SeekOrigin::FromCurrentPos);
+            while (base_stream.GetPosition() >= 0 && PeekByte() == 0xff) {
+                base_stream.WriteByte(0);
+
+                base_stream.Seek(-2, Common::SeekOrigin::FromCurrentPos);
+            }
+            base_stream.WriteByte(static_cast<u8>((PeekByte() + 1)));
+            base_stream.Seek(current_pos, Common::SeekOrigin::SetOrigin);
+        }
+        base_stream.WriteByte(static_cast<u8>((low_value >> (24 - offset))));
+
+        low_value <<= offset;
+        shift = count;
+        low_value &= 0xffffff;
+        count -= 8;
+    }
+
+    low_value <<= shift;
+    range = local_range;
+}
+
+void VpxRangeEncoder::End() {
+    for (std::size_t index = 0; index < 32; ++index) {
+        Write(false);
+    }
+}
+
+u8 VpxRangeEncoder::PeekByte() {
+    const u8 value = base_stream.ReadByte();
+    base_stream.Seek(-1, Common::SeekOrigin::FromCurrentPos);
+
+    return value;
+}
+
+VpxBitStreamWriter::VpxBitStreamWriter() = default;
+
+VpxBitStreamWriter::~VpxBitStreamWriter() = default;
+
+void VpxBitStreamWriter::WriteU(u32 value, u32 value_size) {
+    WriteBits(value, value_size);
+}
+
+void VpxBitStreamWriter::WriteS(s32 value, u32 value_size) {
+    const bool sign = value < 0;
+    if (sign) {
+        value = -value;
+    }
+
+    WriteBits(static_cast<u32>(value << 1) | (sign ? 1 : 0), value_size + 1);
+}
+
+void VpxBitStreamWriter::WriteDeltaQ(u32 value) {
+    const bool delta_coded = value != 0;
+    WriteBit(delta_coded);
+
+    if (delta_coded) {
+        WriteBits(value, 4);
+    }
+}
+
+void VpxBitStreamWriter::WriteBits(u32 value, u32 bit_count) {
+    s32 value_pos = 0;
+    s32 remaining = bit_count;
+
+    while (remaining > 0) {
+        s32 copy_size = remaining;
+
+        const s32 free = GetFreeBufferBits();
+
+        if (copy_size > free) {
+            copy_size = free;
+        }
+
+        const s32 mask = (1 << copy_size) - 1;
+
+        const s32 src_shift = (bit_count - value_pos) - copy_size;
+        const s32 dst_shift = (buffer_size - buffer_pos) - copy_size;
+
+        buffer |= ((value >> src_shift) & mask) << dst_shift;
+
+        value_pos += copy_size;
+        buffer_pos += copy_size;
+        remaining -= copy_size;
+    }
+}
+
+void VpxBitStreamWriter::WriteBit(bool state) {
+    WriteBits(state ? 1 : 0, 1);
+}
+
+s32 VpxBitStreamWriter::GetFreeBufferBits() {
+    if (buffer_pos == buffer_size) {
+        Flush();
+    }
+
+    return buffer_size - buffer_pos;
+}
+
+void VpxBitStreamWriter::Flush() {
+    if (buffer_pos == 0) {
+        return;
+    }
+    byte_array.push_back(static_cast<u8>(buffer));
+    buffer = 0;
+    buffer_pos = 0;
+}
+
+std::vector<u8>& VpxBitStreamWriter::GetByteArray() {
+    return byte_array;
+}
+
+const std::vector<u8>& VpxBitStreamWriter::GetByteArray() const {
+    return byte_array;
+}
+
+} // namespace Tegra::Decoder
diff --git a/src/video_core/command_classes/codecs/vp9.h b/src/video_core/command_classes/codecs/vp9.h
new file mode 100644
index 000000000..748e11bae
--- /dev/null
+++ b/src/video_core/command_classes/codecs/vp9.h
@@ -0,0 +1,216 @@
+// Copyright 2020 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <unordered_map>
+#include <vector>
+#include "common/common_funcs.h"
+#include "common/common_types.h"
+#include "common/stream.h"
+#include "video_core/command_classes/codecs/vp9_types.h"
+#include "video_core/command_classes/nvdec_common.h"
+
+namespace Tegra {
+class GPU;
+enum class FrameType { KeyFrame = 0, InterFrame = 1 };
+namespace Decoder {
+
+/// The VpxRangeEncoder, and VpxBitStreamWriter classes are used to compose the
+/// VP9 header bitstreams.
+
+class VpxRangeEncoder {
+public:
+    VpxRangeEncoder();
+    ~VpxRangeEncoder();
+
+    /// Writes the rightmost value_size bits from value into the stream
+    void Write(s32 value, s32 value_size);
+
+    /// Writes a single bit with half probability
+    void Write(bool bit);
+
+    /// Writes a bit to the base_stream encoded with probability
+    void Write(bool bit, s32 probability);
+
+    /// Signal the end of the bitstream
+    void End();
+
+    std::vector<u8>& GetBuffer() {
+        return base_stream.GetBuffer();
+    }
+
+    const std::vector<u8>& GetBuffer() const {
+        return base_stream.GetBuffer();
+    }
+
+private:
+    u8 PeekByte();
+    Common::Stream base_stream{};
+    u32 low_value{};
+    u32 range{0xff};
+    s32 count{-24};
+    s32 half_probability{128};
+    static constexpr std::array<s32, 256> norm_lut{
+        0, 7, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
+        3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+        2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+        1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+        1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+        0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+        0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+        0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+        0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+    };
+};
+
+class VpxBitStreamWriter {
+public:
+    VpxBitStreamWriter();
+    ~VpxBitStreamWriter();
+
+    /// Write an unsigned integer value
+    void WriteU(u32 value, u32 value_size);
+
+    /// Write a signed integer value
+    void WriteS(s32 value, u32 value_size);
+
+    /// Based on 6.2.10 of VP9 Spec, writes a delta coded value
+    void WriteDeltaQ(u32 value);
+
+    /// Write a single bit.
+    void WriteBit(bool state);
+
+    /// Pushes current buffer into buffer_array, resets buffer
+    void Flush();
+
+    /// Returns byte_array
+    std::vector<u8>& GetByteArray();
+
+    /// Returns const byte_array
+    const std::vector<u8>& GetByteArray() const;
+
+private:
+    /// Write bit_count bits from value into buffer
+    void WriteBits(u32 value, u32 bit_count);
+
+    /// Gets next available position in buffer, invokes Flush() if buffer is full
+    s32 GetFreeBufferBits();
+
+    s32 buffer_size{8};
+
+    s32 buffer{};
+    s32 buffer_pos{};
+    std::vector<u8> byte_array;
+};
+
+class VP9 {
+public:
+    explicit VP9(GPU& gpu);
+    ~VP9();
+
+    /// Composes the VP9 frame from the GPU state information. Based on the official VP9 spec
+    /// documentation
+    std::vector<u8>& ComposeFrameHeader(NvdecCommon::NvdecRegisters& state);
+
+    /// Returns true if the most recent frame was a hidden frame.
+    bool WasFrameHidden() const {
+        return hidden;
+    }
+
+private:
+    /// Generates compressed header probability updates in the bitstream writer
+    template <typename T, std::size_t N>
+    void WriteProbabilityUpdate(VpxRangeEncoder& writer, const std::array<T, N>& new_prob,
+                                const std::array<T, N>& old_prob);
+
+    /// Generates compressed header probability updates in the bitstream writer
+    /// If probs are not equal, WriteProbabilityDelta is invoked
+    void WriteProbabilityUpdate(VpxRangeEncoder& writer, u8 new_prob, u8 old_prob);
+
+    /// Generates compressed header probability deltas in the bitstream writer
+    void WriteProbabilityDelta(VpxRangeEncoder& writer, u8 new_prob, u8 old_prob);
+
+    /// Adjusts old_prob depending on new_prob. Based on section 6.3.5 of VP9 Specification
+    s32 RemapProbability(s32 new_prob, s32 old_prob);
+
+    /// Recenters probability. Based on section 6.3.6 of VP9 Specification
+    s32 RecenterNonNeg(s32 new_prob, s32 old_prob);
+
+    /// Inverse of 6.3.4 Decode term subexp
+    void EncodeTermSubExp(VpxRangeEncoder& writer, s32 value);
+
+    /// Writes if the value is less than the test value
+    bool WriteLessThan(VpxRangeEncoder& writer, s32 value, s32 test);
+
+    /// Writes probability updates for the Coef probabilities
+    void WriteCoefProbabilityUpdate(VpxRangeEncoder& writer, s32 tx_mode,
+                                    const std::array<u8, 2304>& new_prob,
+                                    const std::array<u8, 2304>& old_prob);
+
+    /// Write probabilities for 4-byte aligned structures
+    template <typename T, std::size_t N>
+    void WriteProbabilityUpdateAligned4(VpxRangeEncoder& writer, const std::array<T, N>& new_prob,
+                                        const std::array<T, N>& old_prob);
+
+    /// Write motion vector probability updates. 6.3.17 in the spec
+    void WriteMvProbabilityUpdate(VpxRangeEncoder& writer, u8 new_prob, u8 old_prob);
+
+    /// 6.2.14 Tile size calculation
+    s32 CalcMinLog2TileCols(s32 frame_width);
+    s32 CalcMaxLog2TileCols(s32 frame_width);
+
+    /// Returns VP9 information from NVDEC provided offset and size
+    Vp9PictureInfo GetVp9PictureInfo(const NvdecCommon::NvdecRegisters& state);
+
+    /// Read and convert NVDEC provided entropy probs to Vp9EntropyProbs struct
+    void InsertEntropy(u64 offset, Vp9EntropyProbs& dst);
+
+    /// Returns frame to be decoded after buffering
+    Vp9FrameContainer GetCurrentFrame(const NvdecCommon::NvdecRegisters& state);
+
+    /// Use NVDEC providied information to compose the headers for the current frame
+    std::vector<u8> ComposeCompressedHeader();
+    VpxBitStreamWriter ComposeUncompressedHeader();
+
+    GPU& gpu;
+    std::vector<u8> frame;
+
+    std::array<s8, 4> loop_filter_ref_deltas{};
+    std::array<s8, 2> loop_filter_mode_deltas{};
+
+    bool hidden;
+    s64 current_frame_number = -2; // since we buffer 2 frames
+    s32 grace_period = 6;          // frame offsets need to stabilize
+    std::array<FrameContexts, 4> frame_ctxs{};
+    Vp9FrameContainer next_frame{};
+    Vp9FrameContainer next_next_frame{};
+    bool swap_next_golden{};
+
+    Vp9PictureInfo current_frame_info{};
+    Vp9EntropyProbs prev_frame_probs{};
+
+    s32 diff_update_probability = 252;
+    s32 frame_sync_code = 0x498342;
+    static constexpr std::array<s32, 254> map_lut = {
+        20,  21,  22,  23,  24,  25,  0,   26,  27,  28,  29,  30,  31,  32,  33,  34,  35,
+        36,  37,  1,   38,  39,  40,  41,  42,  43,  44,  45,  46,  47,  48,  49,  2,   50,
+        51,  52,  53,  54,  55,  56,  57,  58,  59,  60,  61,  3,   62,  63,  64,  65,  66,
+        67,  68,  69,  70,  71,  72,  73,  4,   74,  75,  76,  77,  78,  79,  80,  81,  82,
+        83,  84,  85,  5,   86,  87,  88,  89,  90,  91,  92,  93,  94,  95,  96,  97,  6,
+        98,  99,  100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 7,   110, 111, 112, 113,
+        114, 115, 116, 117, 118, 119, 120, 121, 8,   122, 123, 124, 125, 126, 127, 128, 129,
+        130, 131, 132, 133, 9,   134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 144, 145,
+        10,  146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 11,  158, 159, 160,
+        161, 162, 163, 164, 165, 166, 167, 168, 169, 12,  170, 171, 172, 173, 174, 175, 176,
+        177, 178, 179, 180, 181, 13,  182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 192,
+        193, 14,  194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 15,  206, 207,
+        208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 16,  218, 219, 220, 221, 222, 223,
+        224, 225, 226, 227, 228, 229, 17,  230, 231, 232, 233, 234, 235, 236, 237, 238, 239,
+        240, 241, 18,  242, 243, 244, 245, 246, 247, 248, 249, 250, 251, 252, 253, 19,
+    };
+};
+
+} // namespace Decoder
+} // namespace Tegra
diff --git a/src/video_core/command_classes/codecs/vp9_types.h b/src/video_core/command_classes/codecs/vp9_types.h
new file mode 100644
index 000000000..8688fdac0
--- /dev/null
+++ b/src/video_core/command_classes/codecs/vp9_types.h
@@ -0,0 +1,369 @@
+// Copyright 2020 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <algorithm>
+#include <list>
+#include <vector>
+#include "common/cityhash.h"
+#include "common/common_funcs.h"
+#include "common/common_types.h"
+#include "video_core/command_classes/nvdec_common.h"
+
+namespace Tegra {
+class GPU;
+
+namespace Decoder {
+struct Vp9FrameDimensions {
+    s16 width{};
+    s16 height{};
+    s16 luma_pitch{};
+    s16 chroma_pitch{};
+};
+static_assert(sizeof(Vp9FrameDimensions) == 0x8, "Vp9 Vp9FrameDimensions is an invalid size");
+
+enum FrameFlags : u32 {
+    IsKeyFrame = 1 << 0,
+    LastFrameIsKeyFrame = 1 << 1,
+    FrameSizeChanged = 1 << 2,
+    ErrorResilientMode = 1 << 3,
+    LastShowFrame = 1 << 4,
+    IntraOnly = 1 << 5,
+};
+
+enum class MvJointType {
+    MvJointZero = 0,   /* Zero vector */
+    MvJointHnzvz = 1,  /* Vert zero, hor nonzero */
+    MvJointHzvnz = 2,  /* Hor zero, vert nonzero */
+    MvJointHnzvnz = 3, /* Both components nonzero */
+};
+enum class MvClassType {
+    MvClass0 = 0,   /* (0, 2]     integer pel */
+    MvClass1 = 1,   /* (2, 4]     integer pel */
+    MvClass2 = 2,   /* (4, 8]     integer pel */
+    MvClass3 = 3,   /* (8, 16]    integer pel */
+    MvClass4 = 4,   /* (16, 32]   integer pel */
+    MvClass5 = 5,   /* (32, 64]   integer pel */
+    MvClass6 = 6,   /* (64, 128]  integer pel */
+    MvClass7 = 7,   /* (128, 256] integer pel */
+    MvClass8 = 8,   /* (256, 512] integer pel */
+    MvClass9 = 9,   /* (512, 1024] integer pel */
+    MvClass10 = 10, /* (1024,2048] integer pel */
+};
+
+enum class BlockSize {
+    Block4x4 = 0,
+    Block4x8 = 1,
+    Block8x4 = 2,
+    Block8x8 = 3,
+    Block8x16 = 4,
+    Block16x8 = 5,
+    Block16x16 = 6,
+    Block16x32 = 7,
+    Block32x16 = 8,
+    Block32x32 = 9,
+    Block32x64 = 10,
+    Block64x32 = 11,
+    Block64x64 = 12,
+    BlockSizes = 13,
+    BlockInvalid = BlockSizes
+};
+
+enum class PredictionMode {
+    DcPred = 0,   // Average of above and left pixels
+    VPred = 1,    // Vertical
+    HPred = 2,    // Horizontal
+    D45Pred = 3,  // Directional 45  deg = round(arctan(1 / 1) * 180 / pi)
+    D135Pred = 4, // Directional 135 deg = 180 - 45
+    D117Pred = 5, // Directional 117 deg = 180 - 63
+    D153Pred = 6, // Directional 153 deg = 180 - 27
+    D207Pred = 7, // Directional 207 deg = 180 + 27
+    D63Pred = 8,  // Directional 63  deg = round(arctan(2 / 1) * 180 / pi)
+    TmPred = 9,   // True-motion
+    NearestMv = 10,
+    NearMv = 11,
+    ZeroMv = 12,
+    NewMv = 13,
+    MbModeCount = 14
+};
+
+enum class TxSize {
+    Tx4x4 = 0,   // 4x4 transform
+    Tx8x8 = 1,   // 8x8 transform
+    Tx16x16 = 2, // 16x16 transform
+    Tx32x32 = 3, // 32x32 transform
+    TxSizes = 4
+};
+
+enum class TxMode {
+    Only4X4 = 0,      // Only 4x4 transform used
+    Allow8X8 = 1,     // Allow block transform size up to 8x8
+    Allow16X16 = 2,   // Allow block transform size up to 16x16
+    Allow32X32 = 3,   // Allow block transform size up to 32x32
+    TxModeSelect = 4, // Transform specified for each block
+    TxModes = 5
+};
+
+enum class reference_mode {
+    SingleReference = 0,
+    CompoundReference = 1,
+    ReferenceModeSelect = 2,
+    ReferenceModes = 3
+};
+
+struct Segmentation {
+    u8 enabled{};
+    u8 update_map{};
+    u8 temporal_update{};
+    u8 abs_delta{};
+    std::array<u32, 8> feature_mask{};
+    std::array<std::array<s16, 4>, 8> feature_data{};
+};
+static_assert(sizeof(Segmentation) == 0x64, "Segmentation is an invalid size");
+
+struct LoopFilter {
+    u8 mode_ref_delta_enabled{};
+    std::array<s8, 4> ref_deltas{};
+    std::array<s8, 2> mode_deltas{};
+};
+static_assert(sizeof(LoopFilter) == 0x7, "LoopFilter is an invalid size");
+
+struct Vp9EntropyProbs {
+    std::array<u8, 36> y_mode_prob{};
+    std::array<u8, 64> partition_prob{};
+    std::array<u8, 2304> coef_probs{};
+    std::array<u8, 8> switchable_interp_prob{};
+    std::array<u8, 28> inter_mode_prob{};
+    std::array<u8, 4> intra_inter_prob{};
+    std::array<u8, 5> comp_inter_prob{};
+    std::array<u8, 10> single_ref_prob{};
+    std::array<u8, 5> comp_ref_prob{};
+    std::array<u8, 6> tx_32x32_prob{};
+    std::array<u8, 4> tx_16x16_prob{};
+    std::array<u8, 2> tx_8x8_prob{};
+    std::array<u8, 3> skip_probs{};
+    std::array<u8, 3> joints{};
+    std::array<u8, 2> sign{};
+    std::array<u8, 20> classes{};
+    std::array<u8, 2> class_0{};
+    std::array<u8, 20> prob_bits{};
+    std::array<u8, 12> class_0_fr{};
+    std::array<u8, 6> fr{};
+    std::array<u8, 2> class_0_hp{};
+    std::array<u8, 2> high_precision{};
+};
+static_assert(sizeof(Vp9EntropyProbs) == 0x9F4, "Vp9EntropyProbs is an invalid size");
+
+struct Vp9PictureInfo {
+    bool is_key_frame{};
+    bool intra_only{};
+    bool last_frame_was_key{};
+    bool frame_size_changed{};
+    bool error_resilient_mode{};
+    bool last_frame_shown{};
+    bool show_frame{};
+    std::array<s8, 4> ref_frame_sign_bias{};
+    s32 base_q_index{};
+    s32 y_dc_delta_q{};
+    s32 uv_dc_delta_q{};
+    s32 uv_ac_delta_q{};
+    bool lossless{};
+    s32 transform_mode{};
+    bool allow_high_precision_mv{};
+    s32 interp_filter{};
+    s32 reference_mode{};
+    s8 comp_fixed_ref{};
+    std::array<s8, 2> comp_var_ref{};
+    s32 log2_tile_cols{};
+    s32 log2_tile_rows{};
+    bool segment_enabled{};
+    bool segment_map_update{};
+    bool segment_map_temporal_update{};
+    s32 segment_abs_delta{};
+    std::array<u32, 8> segment_feature_enable{};
+    std::array<std::array<s16, 4>, 8> segment_feature_data{};
+    bool mode_ref_delta_enabled{};
+    bool use_prev_in_find_mv_refs{};
+    std::array<s8, 4> ref_deltas{};
+    std::array<s8, 2> mode_deltas{};
+    Vp9EntropyProbs entropy{};
+    Vp9FrameDimensions frame_size{};
+    u8 first_level{};
+    u8 sharpness_level{};
+    u32 bitstream_size{};
+    std::array<u64, 4> frame_offsets{};
+    std::array<bool, 4> refresh_frame{};
+};
+
+struct Vp9FrameContainer {
+    Vp9PictureInfo info{};
+    std::vector<u8> bit_stream;
+};
+
+struct PictureInfo {
+    INSERT_PADDING_WORDS(12);
+    u32 bitstream_size{};
+    INSERT_PADDING_WORDS(5);
+    Vp9FrameDimensions last_frame_size{};
+    Vp9FrameDimensions golden_frame_size{};
+    Vp9FrameDimensions alt_frame_size{};
+    Vp9FrameDimensions current_frame_size{};
+    u32 vp9_flags{};
+    std::array<s8, 4> ref_frame_sign_bias{};
+    u8 first_level{};
+    u8 sharpness_level{};
+    u8 base_q_index{};
+    u8 y_dc_delta_q{};
+    u8 uv_ac_delta_q{};
+    u8 uv_dc_delta_q{};
+    u8 lossless{};
+    u8 tx_mode{};
+    u8 allow_high_precision_mv{};
+    u8 interp_filter{};
+    u8 reference_mode{};
+    s8 comp_fixed_ref{};
+    std::array<s8, 2> comp_var_ref{};
+    u8 log2_tile_cols{};
+    u8 log2_tile_rows{};
+    Segmentation segmentation{};
+    LoopFilter loop_filter{};
+    INSERT_PADDING_BYTES(5);
+    u32 surface_params{};
+    INSERT_PADDING_WORDS(3);
+
+    Vp9PictureInfo Convert() const {
+
+        return Vp9PictureInfo{
+            .is_key_frame = (vp9_flags & FrameFlags::IsKeyFrame) != 0,
+            .intra_only = (vp9_flags & FrameFlags::IntraOnly) != 0,
+            .last_frame_was_key = (vp9_flags & FrameFlags::LastFrameIsKeyFrame) != 0,
+            .frame_size_changed = (vp9_flags & FrameFlags::FrameSizeChanged) != 0,
+            .error_resilient_mode = (vp9_flags & FrameFlags::ErrorResilientMode) != 0,
+            .last_frame_shown = (vp9_flags & FrameFlags::LastShowFrame) != 0,
+            .ref_frame_sign_bias = ref_frame_sign_bias,
+            .base_q_index = base_q_index,
+            .y_dc_delta_q = y_dc_delta_q,
+            .uv_dc_delta_q = uv_dc_delta_q,
+            .uv_ac_delta_q = uv_ac_delta_q,
+            .lossless = lossless != 0,
+            .transform_mode = tx_mode,
+            .allow_high_precision_mv = allow_high_precision_mv != 0,
+            .interp_filter = interp_filter,
+            .reference_mode = reference_mode,
+            .comp_fixed_ref = comp_fixed_ref,
+            .comp_var_ref = comp_var_ref,
+            .log2_tile_cols = log2_tile_cols,
+            .log2_tile_rows = log2_tile_rows,
+            .segment_enabled = segmentation.enabled != 0,
+            .segment_map_update = segmentation.update_map != 0,
+            .segment_map_temporal_update = segmentation.temporal_update != 0,
+            .segment_abs_delta = segmentation.abs_delta,
+            .segment_feature_enable = segmentation.feature_mask,
+            .segment_feature_data = segmentation.feature_data,
+            .mode_ref_delta_enabled = loop_filter.mode_ref_delta_enabled != 0,
+            .use_prev_in_find_mv_refs = !(vp9_flags == (FrameFlags::ErrorResilientMode)) &&
+                                        !(vp9_flags == (FrameFlags::FrameSizeChanged)) &&
+                                        !(vp9_flags == (FrameFlags::IntraOnly)) &&
+                                        (vp9_flags == (FrameFlags::LastShowFrame)) &&
+                                        !(vp9_flags == (FrameFlags::LastFrameIsKeyFrame)),
+            .ref_deltas = loop_filter.ref_deltas,
+            .mode_deltas = loop_filter.mode_deltas,
+            .frame_size = current_frame_size,
+            .first_level = first_level,
+            .sharpness_level = sharpness_level,
+            .bitstream_size = bitstream_size,
+        };
+    }
+};
+static_assert(sizeof(PictureInfo) == 0x100, "PictureInfo is an invalid size");
+
+struct EntropyProbs {
+    INSERT_PADDING_BYTES(1024);
+    std::array<std::array<u8, 4>, 7> inter_mode_prob{};
+    std::array<u8, 4> intra_inter_prob{};
+    INSERT_PADDING_BYTES(80);
+    std::array<std::array<u8, 1>, 2> tx_8x8_prob{};
+    std::array<std::array<u8, 2>, 2> tx_16x16_prob{};
+    std::array<std::array<u8, 3>, 2> tx_32x32_prob{};
+    std::array<u8, 4> y_mode_prob_e8{};
+    std::array<std::array<u8, 8>, 4> y_mode_prob_e0e7{};
+    INSERT_PADDING_BYTES(64);
+    std::array<std::array<u8, 4>, 16> partition_prob{};
+    INSERT_PADDING_BYTES(10);
+    std::array<std::array<u8, 2>, 4> switchable_interp_prob{};
+    std::array<u8, 5> comp_inter_prob{};
+    std::array<u8, 4> skip_probs{};
+    std::array<u8, 3> joints{};
+    std::array<u8, 2> sign{};
+    std::array<std::array<u8, 1>, 2> class_0{};
+    std::array<std::array<u8, 3>, 2> fr{};
+    std::array<u8, 2> class_0_hp{};
+    std::array<u8, 2> high_precision{};
+    std::array<std::array<u8, 10>, 2> classes{};
+    std::array<std::array<std::array<u8, 3>, 2>, 2> class_0_fr{};
+    std::array<std::array<u8, 10>, 2> pred_bits{};
+    std::array<std::array<u8, 2>, 5> single_ref_prob{};
+    std::array<u8, 5> comp_ref_prob{};
+    INSERT_PADDING_BYTES(17);
+    std::array<std::array<std::array<std::array<std::array<std::array<u8, 4>, 6>, 6>, 2>, 2>, 4>
+        coef_probs{};
+
+    void Convert(Vp9EntropyProbs& fc) {
+        std::memcpy(fc.inter_mode_prob.data(), inter_mode_prob.data(), fc.inter_mode_prob.size());
+
+        std::memcpy(fc.intra_inter_prob.data(), intra_inter_prob.data(),
+                    fc.intra_inter_prob.size());
+
+        std::memcpy(fc.tx_8x8_prob.data(), tx_8x8_prob.data(), fc.tx_8x8_prob.size());
+        std::memcpy(fc.tx_16x16_prob.data(), tx_16x16_prob.data(), fc.tx_16x16_prob.size());
+        std::memcpy(fc.tx_32x32_prob.data(), tx_32x32_prob.data(), fc.tx_32x32_prob.size());
+
+        for (s32 i = 0; i < 4; i++) {
+            for (s32 j = 0; j < 9; j++) {
+                fc.y_mode_prob[j + 9 * i] = j < 8 ? y_mode_prob_e0e7[i][j] : y_mode_prob_e8[i];
+            }
+        }
+
+        std::memcpy(fc.partition_prob.data(), partition_prob.data(), fc.partition_prob.size());
+
+        std::memcpy(fc.switchable_interp_prob.data(), switchable_interp_prob.data(),
+                    fc.switchable_interp_prob.size());
+        std::memcpy(fc.comp_inter_prob.data(), comp_inter_prob.data(), fc.comp_inter_prob.size());
+        std::memcpy(fc.skip_probs.data(), skip_probs.data(), fc.skip_probs.size());
+
+        std::memcpy(fc.joints.data(), joints.data(), fc.joints.size());
+
+        std::memcpy(fc.sign.data(), sign.data(), fc.sign.size());
+        std::memcpy(fc.class_0.data(), class_0.data(), fc.class_0.size());
+        std::memcpy(fc.fr.data(), fr.data(), fc.fr.size());
+        std::memcpy(fc.class_0_hp.data(), class_0_hp.data(), fc.class_0_hp.size());
+        std::memcpy(fc.high_precision.data(), high_precision.data(), fc.high_precision.size());
+        std::memcpy(fc.classes.data(), classes.data(), fc.classes.size());
+        std::memcpy(fc.class_0_fr.data(), class_0_fr.data(), fc.class_0_fr.size());
+        std::memcpy(fc.prob_bits.data(), pred_bits.data(), fc.prob_bits.size());
+        std::memcpy(fc.single_ref_prob.data(), single_ref_prob.data(), fc.single_ref_prob.size());
+        std::memcpy(fc.comp_ref_prob.data(), comp_ref_prob.data(), fc.comp_ref_prob.size());
+
+        std::memcpy(fc.coef_probs.data(), coef_probs.data(), fc.coef_probs.size());
+    }
+};
+static_assert(sizeof(EntropyProbs) == 0xEA0, "EntropyProbs is an invalid size");
+
+enum class Ref { Last, Golden, AltRef };
+
+struct RefPoolElement {
+    s64 frame{};
+    Ref ref{};
+    bool refresh{};
+};
+
+struct FrameContexts {
+    s64 from{};
+    bool adapted{};
+    Vp9EntropyProbs probs{};
+};
+
+}; // namespace Decoder
+}; // namespace Tegra
diff --git a/src/video_core/command_classes/host1x.cpp b/src/video_core/command_classes/host1x.cpp
new file mode 100644
index 000000000..a5234ee47
--- /dev/null
+++ b/src/video_core/command_classes/host1x.cpp
@@ -0,0 +1,39 @@
+// Copyright 2020 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "common/assert.h"
+#include "video_core/command_classes/host1x.h"
+#include "video_core/gpu.h"
+
+Tegra::Host1x::Host1x(GPU& gpu_) : gpu(gpu_) {}
+
+Tegra::Host1x::~Host1x() = default;
+
+void Tegra::Host1x::StateWrite(u32 offset, u32 arguments) {
+    u8* const state_offset = reinterpret_cast<u8*>(&state) + offset * sizeof(u32);
+    std::memcpy(state_offset, &arguments, sizeof(u32));
+}
+
+void Tegra::Host1x::ProcessMethod(Host1x::Method method, const std::vector<u32>& arguments) {
+    StateWrite(static_cast<u32>(method), arguments[0]);
+    switch (method) {
+    case Method::WaitSyncpt:
+        Execute(arguments[0]);
+        break;
+    case Method::LoadSyncptPayload32:
+        syncpoint_value = arguments[0];
+        break;
+    case Method::WaitSyncpt32:
+        Execute(arguments[0]);
+        break;
+    default:
+        UNIMPLEMENTED_MSG("Host1x method 0x{:X}", static_cast<u32>(method));
+        break;
+    }
+}
+
+void Tegra::Host1x::Execute(u32 data) {
+    // This method waits on a valid syncpoint.
+    // TODO: Implement when proper Async is in place
+}
diff --git a/src/video_core/command_classes/host1x.h b/src/video_core/command_classes/host1x.h
new file mode 100644
index 000000000..501a5ed2e
--- /dev/null
+++ b/src/video_core/command_classes/host1x.h
@@ -0,0 +1,78 @@
+// Copyright 2020 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <vector>
+#include "common/common_funcs.h"
+#include "common/common_types.h"
+
+namespace Tegra {
+class GPU;
+class Nvdec;
+
+class Host1x {
+public:
+    struct Host1xClassRegisters {
+        u32 incr_syncpt{};
+        u32 incr_syncpt_ctrl{};
+        u32 incr_syncpt_error{};
+        INSERT_PADDING_WORDS(5);
+        u32 wait_syncpt{};
+        u32 wait_syncpt_base{};
+        u32 wait_syncpt_incr{};
+        u32 load_syncpt_base{};
+        u32 incr_syncpt_base{};
+        u32 clear{};
+        u32 wait{};
+        u32 wait_with_interrupt{};
+        u32 delay_use{};
+        u32 tick_count_high{};
+        u32 tick_count_low{};
+        u32 tick_ctrl{};
+        INSERT_PADDING_WORDS(23);
+        u32 ind_ctrl{};
+        u32 ind_off2{};
+        u32 ind_off{};
+        std::array<u32, 31> ind_data{};
+        INSERT_PADDING_WORDS(1);
+        u32 load_syncpoint_payload32{};
+        u32 stall_ctrl{};
+        u32 wait_syncpt32{};
+        u32 wait_syncpt_base32{};
+        u32 load_syncpt_base32{};
+        u32 incr_syncpt_base32{};
+        u32 stall_count_high{};
+        u32 stall_count_low{};
+        u32 xref_ctrl{};
+        u32 channel_xref_high{};
+        u32 channel_xref_low{};
+    };
+    static_assert(sizeof(Host1xClassRegisters) == 0x164, "Host1xClassRegisters is an invalid size");
+
+    enum class Method : u32 {
+        WaitSyncpt = offsetof(Host1xClassRegisters, wait_syncpt) / 4,
+        LoadSyncptPayload32 = offsetof(Host1xClassRegisters, load_syncpoint_payload32) / 4,
+        WaitSyncpt32 = offsetof(Host1xClassRegisters, wait_syncpt32) / 4,
+    };
+
+    explicit Host1x(GPU& gpu);
+    ~Host1x();
+
+    /// Writes the method into the state, Invoke Execute() if encountered
+    void ProcessMethod(Host1x::Method method, const std::vector<u32>& arguments);
+
+private:
+    /// For Host1x, execute is waiting on a syncpoint previously written into the state
+    void Execute(u32 data);
+
+    /// Write argument into the provided offset
+    void StateWrite(u32 offset, u32 arguments);
+
+    u32 syncpoint_value{};
+    Host1xClassRegisters state{};
+    GPU& gpu;
+};
+
+} // namespace Tegra
diff --git a/src/video_core/command_classes/nvdec.cpp b/src/video_core/command_classes/nvdec.cpp
new file mode 100644
index 000000000..ede9466eb
--- /dev/null
+++ b/src/video_core/command_classes/nvdec.cpp
@@ -0,0 +1,56 @@
+// Copyright 2020 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include <bitset>
+#include "common/assert.h"
+#include "common/bit_util.h"
+#include "core/memory.h"
+#include "video_core/command_classes/nvdec.h"
+#include "video_core/gpu.h"
+#include "video_core/memory_manager.h"
+
+namespace Tegra {
+
+Nvdec::Nvdec(GPU& gpu_) : gpu(gpu_), codec(std::make_unique<Codec>(gpu)) {}
+
+Nvdec::~Nvdec() = default;
+
+void Nvdec::ProcessMethod(Nvdec::Method method, const std::vector<u32>& arguments) {
+    if (method == Method::SetVideoCodec) {
+        codec->StateWrite(static_cast<u32>(method), arguments[0]);
+    } else {
+        codec->StateWrite(static_cast<u32>(method), static_cast<u64>(arguments[0]) << 8);
+    }
+
+    switch (method) {
+    case Method::SetVideoCodec:
+        codec->SetTargetCodec(static_cast<NvdecCommon::VideoCodec>(arguments[0]));
+        break;
+    case Method::Execute:
+        Execute();
+        break;
+    }
+}
+
+AVFrame* Nvdec::GetFrame() {
+    return codec->GetCurrentFrame();
+}
+
+const AVFrame* Nvdec::GetFrame() const {
+    return codec->GetCurrentFrame();
+}
+
+void Nvdec::Execute() {
+    switch (codec->GetCurrentCodec()) {
+    case NvdecCommon::VideoCodec::H264:
+    case NvdecCommon::VideoCodec::Vp9:
+        codec->Decode();
+        break;
+    default:
+        UNIMPLEMENTED_MSG("Unknown codec {}", static_cast<u32>(codec->GetCurrentCodec()));
+        break;
+    }
+}
+
+} // namespace Tegra
diff --git a/src/video_core/command_classes/nvdec.h b/src/video_core/command_classes/nvdec.h
new file mode 100644
index 000000000..c1a9d843e
--- /dev/null
+++ b/src/video_core/command_classes/nvdec.h
@@ -0,0 +1,39 @@
+// Copyright 2020 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <vector>
+#include "common/common_funcs.h"
+#include "common/common_types.h"
+#include "video_core/command_classes/codecs/codec.h"
+
+namespace Tegra {
+class GPU;
+
+class Nvdec {
+public:
+    enum class Method : u32 {
+        SetVideoCodec = 0x80,
+        Execute = 0xc0,
+    };
+
+    explicit Nvdec(GPU& gpu);
+    ~Nvdec();
+
+    /// Writes the method into the state, Invoke Execute() if encountered
+    void ProcessMethod(Nvdec::Method method, const std::vector<u32>& arguments);
+
+    /// Return most recently decoded frame
+    AVFrame* GetFrame();
+    const AVFrame* GetFrame() const;
+
+private:
+    /// Invoke codec to decode a frame
+    void Execute();
+
+    GPU& gpu;
+    std::unique_ptr<Tegra::Codec> codec;
+};
+} // namespace Tegra
diff --git a/src/video_core/command_classes/nvdec_common.h b/src/video_core/command_classes/nvdec_common.h
new file mode 100644
index 000000000..01b5e086d
--- /dev/null
+++ b/src/video_core/command_classes/nvdec_common.h
@@ -0,0 +1,48 @@
+// Copyright 2020 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include "common/common_funcs.h"
+#include "common/common_types.h"
+
+namespace Tegra::NvdecCommon {
+
+struct NvdecRegisters {
+    INSERT_PADDING_WORDS(256);
+    u64 set_codec_id{};
+    INSERT_PADDING_WORDS(254);
+    u64 set_platform_id{};
+    u64 picture_info_offset{};
+    u64 frame_bitstream_offset{};
+    u64 frame_number{};
+    u64 h264_slice_data_offsets{};
+    u64 h264_mv_dump_offset{};
+    INSERT_PADDING_WORDS(6);
+    u64 frame_stats_offset{};
+    u64 h264_last_surface_luma_offset{};
+    u64 h264_last_surface_chroma_offset{};
+    std::array<u64, 17> surface_luma_offset{};
+    std::array<u64, 17> surface_chroma_offset{};
+    INSERT_PADDING_WORDS(132);
+    u64 vp9_entropy_probs_offset{};
+    u64 vp9_backward_updates_offset{};
+    u64 vp9_last_frame_segmap_offset{};
+    u64 vp9_curr_frame_segmap_offset{};
+    INSERT_PADDING_WORDS(2);
+    u64 vp9_last_frame_mvs_offset{};
+    u64 vp9_curr_frame_mvs_offset{};
+    INSERT_PADDING_WORDS(2);
+};
+static_assert(sizeof(NvdecRegisters) == (0xBC0), "NvdecRegisters is incorrect size");
+
+enum class VideoCodec : u32 {
+    None = 0x0,
+    H264 = 0x3,
+    Vp8 = 0x5,
+    H265 = 0x7,
+    Vp9 = 0x9,
+};
+
+} // namespace Tegra::NvdecCommon
diff --git a/src/video_core/command_classes/sync_manager.cpp b/src/video_core/command_classes/sync_manager.cpp
new file mode 100644
index 000000000..a0ab44855
--- /dev/null
+++ b/src/video_core/command_classes/sync_manager.cpp
@@ -0,0 +1,60 @@
+// MIT License
+//
+// Copyright (c) Ryujinx Team and Contributors
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy of this software and
+// associated documentation files (the "Software"), to deal in the Software without restriction,
+// including without limitation the rights to use, copy, modify, merge, publish, distribute,
+// sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in all copies or
+// substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT
+// NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+//
+
+#include <algorithm>
+#include "sync_manager.h"
+#include "video_core/gpu.h"
+
+namespace Tegra {
+SyncptIncrManager::SyncptIncrManager(GPU& gpu_) : gpu(gpu_) {}
+SyncptIncrManager::~SyncptIncrManager() = default;
+
+void SyncptIncrManager::Increment(u32 id) {
+    increments.push_back(SyncptIncr{0, id, true});
+    IncrementAllDone();
+}
+
+u32 SyncptIncrManager::IncrementWhenDone(u32 class_id, u32 id) {
+    const u32 handle = current_id++;
+    increments.push_back(SyncptIncr{handle, class_id, id});
+    return handle;
+}
+
+void SyncptIncrManager::SignalDone(u32 handle) {
+    auto done_incr = std::find_if(increments.begin(), increments.end(),
+                                  [handle](SyncptIncr incr) { return incr.id == handle; });
+    if (done_incr != increments.end()) {
+        const SyncptIncr incr = *done_incr;
+        *done_incr = SyncptIncr{incr.id, incr.class_id, incr.syncpt_id, true};
+    }
+    IncrementAllDone();
+}
+
+void SyncptIncrManager::IncrementAllDone() {
+    std::size_t done_count = 0;
+    for (; done_count < increments.size(); ++done_count) {
+        if (!increments[done_count].complete) {
+            break;
+        }
+        gpu.IncrementSyncPoint(increments[done_count].syncpt_id);
+    }
+    increments.erase(increments.begin(), increments.begin() + done_count);
+}
+} // namespace Tegra
diff --git a/src/video_core/command_classes/sync_manager.h b/src/video_core/command_classes/sync_manager.h
new file mode 100644
index 000000000..353b67573
--- /dev/null
+++ b/src/video_core/command_classes/sync_manager.h
@@ -0,0 +1,64 @@
+// MIT License
+//
+// Copyright (c) Ryujinx Team and Contributors
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy of this software and
+// associated documentation files (the "Software"), to deal in the Software without restriction,
+// including without limitation the rights to use, copy, modify, merge, publish, distribute,
+// sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in all copies or
+// substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT
+// NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+//
+
+#pragma once
+
+#include <mutex>
+#include <vector>
+#include "common/common_types.h"
+
+namespace Tegra {
+class GPU;
+struct SyncptIncr {
+    u32 id;
+    u32 class_id;
+    u32 syncpt_id;
+    bool complete;
+
+    SyncptIncr(u32 id, u32 syncpt_id_, u32 class_id_, bool done = false)
+        : id(id), class_id(class_id_), syncpt_id(syncpt_id_), complete(done) {}
+};
+
+class SyncptIncrManager {
+public:
+    explicit SyncptIncrManager(GPU& gpu);
+    ~SyncptIncrManager();
+
+    /// Add syncpoint id and increment all
+    void Increment(u32 id);
+
+    /// Returns a handle to increment later
+    u32 IncrementWhenDone(u32 class_id, u32 id);
+
+    /// IncrememntAllDone, including handle
+    void SignalDone(u32 handle);
+
+    /// Increment all sequential pending increments that are already done.
+    void IncrementAllDone();
+
+private:
+    std::vector<SyncptIncr> increments;
+    std::mutex increment_lock;
+    u32 current_id{};
+
+    GPU& gpu;
+};
+
+} // namespace Tegra
diff --git a/src/video_core/command_classes/vic.cpp b/src/video_core/command_classes/vic.cpp
new file mode 100644
index 000000000..66e15a1a8
--- /dev/null
+++ b/src/video_core/command_classes/vic.cpp
@@ -0,0 +1,180 @@
+// Copyright 2020 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include <array>
+#include "common/assert.h"
+#include "video_core/command_classes/nvdec.h"
+#include "video_core/command_classes/vic.h"
+#include "video_core/engines/maxwell_3d.h"
+#include "video_core/gpu.h"
+#include "video_core/memory_manager.h"
+#include "video_core/texture_cache/surface_params.h"
+
+extern "C" {
+#include <libswscale/swscale.h>
+}
+
+namespace Tegra {
+
+Vic::Vic(GPU& gpu_, std::shared_ptr<Nvdec> nvdec_processor_)
+    : gpu(gpu_), nvdec_processor(std::move(nvdec_processor_)) {}
+Vic::~Vic() = default;
+
+void Vic::VicStateWrite(u32 offset, u32 arguments) {
+    u8* const state_offset = reinterpret_cast<u8*>(&vic_state) + offset * sizeof(u32);
+    std::memcpy(state_offset, &arguments, sizeof(u32));
+}
+
+void Vic::ProcessMethod(Vic::Method method, const std::vector<u32>& arguments) {
+    LOG_DEBUG(HW_GPU, "Vic method 0x{:X}", static_cast<u32>(method));
+    VicStateWrite(static_cast<u32>(method), arguments[0]);
+    const u64 arg = static_cast<u64>(arguments[0]) << 8;
+    switch (method) {
+    case Method::Execute:
+        Execute();
+        break;
+    case Method::SetConfigStructOffset:
+        config_struct_address = arg;
+        break;
+    case Method::SetOutputSurfaceLumaOffset:
+        output_surface_luma_address = arg;
+        break;
+    case Method::SetOutputSurfaceChromaUOffset:
+        output_surface_chroma_u_address = arg;
+        break;
+    case Method::SetOutputSurfaceChromaVOffset:
+        output_surface_chroma_v_address = arg;
+        break;
+    default:
+        break;
+    }
+}
+
+void Vic::Execute() {
+    if (output_surface_luma_address == 0) {
+        LOG_ERROR(Service_NVDRV, "VIC Luma address not set. Recieved 0x{:X}",
+                  vic_state.output_surface.luma_offset);
+        return;
+    }
+    const VicConfig config{gpu.MemoryManager().Read<u64>(config_struct_address + 0x20)};
+    const VideoPixelFormat pixel_format =
+        static_cast<VideoPixelFormat>(config.pixel_format.Value());
+    switch (pixel_format) {
+    case VideoPixelFormat::BGRA8:
+    case VideoPixelFormat::RGBA8: {
+        LOG_TRACE(Service_NVDRV, "Writing RGB Frame");
+        const auto* frame = nvdec_processor->GetFrame();
+
+        if (!frame || frame->width == 0 || frame->height == 0) {
+            return;
+        }
+        if (scaler_ctx == nullptr || frame->width != scaler_width ||
+            frame->height != scaler_height) {
+            const AVPixelFormat target_format =
+                (pixel_format == VideoPixelFormat::RGBA8) ? AV_PIX_FMT_RGBA : AV_PIX_FMT_BGRA;
+
+            sws_freeContext(scaler_ctx);
+            scaler_ctx = nullptr;
+
+            // FFmpeg returns all frames in YUV420, convert it into expected format
+            scaler_ctx =
+                sws_getContext(frame->width, frame->height, AV_PIX_FMT_YUV420P, frame->width,
+                               frame->height, target_format, 0, nullptr, nullptr, nullptr);
+
+            scaler_width = frame->width;
+            scaler_height = frame->height;
+        }
+        // Get Converted frame
+        const std::size_t linear_size = frame->width * frame->height * 4;
+
+        using AVMallocPtr = std::unique_ptr<u8, decltype(&av_free)>;
+        AVMallocPtr converted_frame_buffer{static_cast<u8*>(av_malloc(linear_size)), av_free};
+
+        const int converted_stride{frame->width * 4};
+        u8* const converted_frame_buf_addr{converted_frame_buffer.get()};
+
+        sws_scale(scaler_ctx, frame->data, frame->linesize, 0, frame->height,
+                  &converted_frame_buf_addr, &converted_stride);
+
+        const u32 blk_kind = static_cast<u32>(config.block_linear_kind);
+        if (blk_kind != 0) {
+            // swizzle pitch linear to block linear
+            const u32 block_height = static_cast<u32>(config.block_linear_height_log2);
+            const auto size = Tegra::Texture::CalculateSize(true, 4, frame->width, frame->height, 1,
+                                                            block_height, 0);
+            std::vector<u8> swizzled_data(size);
+            Tegra::Texture::CopySwizzledData(frame->width, frame->height, 1, 4, 4,
+                                             swizzled_data.data(), converted_frame_buffer.get(),
+                                             false, block_height, 0, 1);
+
+            gpu.MemoryManager().WriteBlock(output_surface_luma_address, swizzled_data.data(), size);
+            gpu.Maxwell3D().OnMemoryWrite();
+        } else {
+            // send pitch linear frame
+            gpu.MemoryManager().WriteBlock(output_surface_luma_address, converted_frame_buf_addr,
+                                           linear_size);
+            gpu.Maxwell3D().OnMemoryWrite();
+        }
+        break;
+    }
+    case VideoPixelFormat::Yuv420: {
+        LOG_TRACE(Service_NVDRV, "Writing YUV420 Frame");
+
+        const auto* frame = nvdec_processor->GetFrame();
+
+        if (!frame || frame->width == 0 || frame->height == 0) {
+            return;
+        }
+
+        const std::size_t surface_width = config.surface_width_minus1 + 1;
+        const std::size_t surface_height = config.surface_height_minus1 + 1;
+        const std::size_t half_width = surface_width / 2;
+        const std::size_t half_height = config.surface_height_minus1 / 2;
+        const std::size_t aligned_width = (surface_width + 0xff) & ~0xff;
+
+        const auto* luma_ptr = frame->data[0];
+        const auto* chroma_b_ptr = frame->data[1];
+        const auto* chroma_r_ptr = frame->data[2];
+        const auto stride = frame->linesize[0];
+        const auto half_stride = frame->linesize[1];
+
+        std::vector<u8> luma_buffer(aligned_width * surface_height);
+        std::vector<u8> chroma_buffer(aligned_width * half_height);
+
+        // Populate luma buffer
+        for (std::size_t y = 0; y < surface_height - 1; ++y) {
+            std::size_t src = y * stride;
+            std::size_t dst = y * aligned_width;
+
+            std::size_t size = surface_width;
+
+            for (std::size_t offset = 0; offset < size; ++offset) {
+                luma_buffer[dst + offset] = luma_ptr[src + offset];
+            }
+        }
+        gpu.MemoryManager().WriteBlock(output_surface_luma_address, luma_buffer.data(),
+                                       luma_buffer.size());
+
+        // Populate chroma buffer from both channels with interleaving.
+        for (std::size_t y = 0; y < half_height; ++y) {
+            std::size_t src = y * half_stride;
+            std::size_t dst = y * aligned_width;
+
+            for (std::size_t x = 0; x < half_width; ++x) {
+                chroma_buffer[dst + x * 2] = chroma_b_ptr[src + x];
+                chroma_buffer[dst + x * 2 + 1] = chroma_r_ptr[src + x];
+            }
+        }
+        gpu.MemoryManager().WriteBlock(output_surface_chroma_u_address, chroma_buffer.data(),
+                                       chroma_buffer.size());
+        gpu.Maxwell3D().OnMemoryWrite();
+        break;
+    }
+    default:
+        UNIMPLEMENTED_MSG("Unknown video pixel format {}", config.pixel_format.Value());
+        break;
+    }
+}
+
+} // namespace Tegra
diff --git a/src/video_core/command_classes/vic.h b/src/video_core/command_classes/vic.h
new file mode 100644
index 000000000..dd0a2aed8
--- /dev/null
+++ b/src/video_core/command_classes/vic.h
@@ -0,0 +1,110 @@
+// Copyright 2020 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <memory>
+#include <vector>
+#include "common/bit_field.h"
+#include "common/common_types.h"
+
+struct SwsContext;
+
+namespace Tegra {
+class GPU;
+class Nvdec;
+
+struct PlaneOffsets {
+    u32 luma_offset{};
+    u32 chroma_u_offset{};
+    u32 chroma_v_offset{};
+};
+
+struct VicRegisters {
+    INSERT_PADDING_WORDS(64);
+    u32 nop{};
+    INSERT_PADDING_WORDS(15);
+    u32 pm_trigger{};
+    INSERT_PADDING_WORDS(47);
+    u32 set_application_id{};
+    u32 set_watchdog_timer{};
+    INSERT_PADDING_WORDS(17);
+    u32 context_save_area{};
+    u32 context_switch{};
+    INSERT_PADDING_WORDS(43);
+    u32 execute{};
+    INSERT_PADDING_WORDS(63);
+    std::array<std::array<PlaneOffsets, 8>, 8> surfacex_slots{};
+    u32 picture_index{};
+    u32 control_params{};
+    u32 config_struct_offset{};
+    u32 filter_struct_offset{};
+    u32 palette_offset{};
+    u32 hist_offset{};
+    u32 context_id{};
+    u32 fce_ucode_size{};
+    PlaneOffsets output_surface{};
+    u32 fce_ucode_offset{};
+    INSERT_PADDING_WORDS(4);
+    std::array<u32, 8> slot_context_id{};
+    INSERT_PADDING_WORDS(16);
+};
+static_assert(sizeof(VicRegisters) == 0x7A0, "VicRegisters is an invalid size");
+
+class Vic {
+public:
+    enum class Method : u32 {
+        Execute = 0xc0,
+        SetControlParams = 0x1c1,
+        SetConfigStructOffset = 0x1c2,
+        SetOutputSurfaceLumaOffset = 0x1c8,
+        SetOutputSurfaceChromaUOffset = 0x1c9,
+        SetOutputSurfaceChromaVOffset = 0x1ca
+    };
+
+    explicit Vic(GPU& gpu, std::shared_ptr<Tegra::Nvdec> nvdec_processor);
+    ~Vic();
+
+    /// Write to the device state.
+    void ProcessMethod(Vic::Method method, const std::vector<u32>& arguments);
+
+private:
+    void Execute();
+
+    void VicStateWrite(u32 offset, u32 arguments);
+    VicRegisters vic_state{};
+
+    enum class VideoPixelFormat : u64_le {
+        RGBA8 = 0x1f,
+        BGRA8 = 0x20,
+        Yuv420 = 0x44,
+    };
+
+    union VicConfig {
+        u64_le raw{};
+        BitField<0, 7, u64_le> pixel_format;
+        BitField<7, 2, u64_le> chroma_loc_horiz;
+        BitField<9, 2, u64_le> chroma_loc_vert;
+        BitField<11, 4, u64_le> block_linear_kind;
+        BitField<15, 4, u64_le> block_linear_height_log2;
+        BitField<19, 3, u64_le> reserved0;
+        BitField<22, 10, u64_le> reserved1;
+        BitField<32, 14, u64_le> surface_width_minus1;
+        BitField<46, 14, u64_le> surface_height_minus1;
+    };
+
+    GPU& gpu;
+    std::shared_ptr<Tegra::Nvdec> nvdec_processor;
+
+    GPUVAddr config_struct_address{};
+    GPUVAddr output_surface_luma_address{};
+    GPUVAddr output_surface_chroma_u_address{};
+    GPUVAddr output_surface_chroma_v_address{};
+
+    SwsContext* scaler_ctx{};
+    s32 scaler_width{};
+    s32 scaler_height{};
+};
+
+} // namespace Tegra
diff --git a/src/video_core/gpu.cpp b/src/video_core/gpu.cpp
index 4bb9256e9..171f78183 100644
--- a/src/video_core/gpu.cpp
+++ b/src/video_core/gpu.cpp
@@ -27,9 +27,10 @@ namespace Tegra {
 
 MICROPROFILE_DEFINE(GPU_wait, "GPU", "Wait for the GPU", MP_RGB(128, 128, 192));
 
-GPU::GPU(Core::System& system_, bool is_async_)
+GPU::GPU(Core::System& system_, bool is_async_, bool use_nvdec_)
     : system{system_}, memory_manager{std::make_unique<Tegra::MemoryManager>(system)},
       dma_pusher{std::make_unique<Tegra::DmaPusher>(system, *this)},
+      cdma_pusher{std::make_unique<Tegra::CDmaPusher>(*this)}, use_nvdec{use_nvdec_},
       maxwell_3d{std::make_unique<Engines::Maxwell3D>(system, *memory_manager)},
       fermi_2d{std::make_unique<Engines::Fermi2D>()},
       kepler_compute{std::make_unique<Engines::KeplerCompute>(system, *memory_manager)},
@@ -77,10 +78,18 @@ DmaPusher& GPU::DmaPusher() {
     return *dma_pusher;
 }
 
+Tegra::CDmaPusher& GPU::CDmaPusher() {
+    return *cdma_pusher;
+}
+
 const DmaPusher& GPU::DmaPusher() const {
     return *dma_pusher;
 }
 
+const Tegra::CDmaPusher& GPU::CDmaPusher() const {
+    return *cdma_pusher;
+}
+
 void GPU::WaitFence(u32 syncpoint_id, u32 value) {
     // Synced GPU, is always in sync
     if (!is_async) {
diff --git a/src/video_core/gpu.h b/src/video_core/gpu.h
index 2d15d1c6f..b8c613b11 100644
--- a/src/video_core/gpu.h
+++ b/src/video_core/gpu.h
@@ -13,6 +13,7 @@
 #include "common/common_types.h"
 #include "core/hle/service/nvdrv/nvdata.h"
 #include "core/hle/service/nvflinger/buffer_queue.h"
+#include "video_core/cdma_pusher.h"
 #include "video_core/dma_pusher.h"
 
 using CacheAddr = std::uintptr_t;
@@ -157,7 +158,7 @@ public:
               method_count(method_count) {}
     };
 
-    explicit GPU(Core::System& system, bool is_async);
+    explicit GPU(Core::System& system, bool is_async, bool use_nvdec);
     virtual ~GPU();
 
     /// Binds a renderer to the GPU.
@@ -209,6 +210,15 @@ public:
     /// Returns a reference to the GPU DMA pusher.
     Tegra::DmaPusher& DmaPusher();
 
+    /// Returns a const reference to the GPU DMA pusher.
+    const Tegra::DmaPusher& DmaPusher() const;
+
+    /// Returns a reference to the GPU CDMA pusher.
+    Tegra::CDmaPusher& CDmaPusher();
+
+    /// Returns a const reference to the GPU CDMA pusher.
+    const Tegra::CDmaPusher& CDmaPusher() const;
+
     VideoCore::RendererBase& Renderer() {
         return *renderer;
     }
@@ -249,8 +259,9 @@ public:
         return is_async;
     }
 
-    /// Returns a const reference to the GPU DMA pusher.
-    const Tegra::DmaPusher& DmaPusher() const;
+    bool UseNvdec() const {
+        return use_nvdec;
+    }
 
     struct Regs {
         static constexpr size_t NUM_REGS = 0x40;
@@ -311,6 +322,9 @@ public:
     /// Push GPU command entries to be processed
     virtual void PushGPUEntries(Tegra::CommandList&& entries) = 0;
 
+    /// Push GPU command buffer entries to be processed
+    virtual void PushCommandBuffer(Tegra::ChCommandHeaderList& entries) = 0;
+
     /// Swap buffers (render frame)
     virtual void SwapBuffers(const Tegra::FramebufferConfig* framebuffer) = 0;
 
@@ -349,7 +363,9 @@ protected:
     Core::System& system;
     std::unique_ptr<Tegra::MemoryManager> memory_manager;
     std::unique_ptr<Tegra::DmaPusher> dma_pusher;
+    std::unique_ptr<Tegra::CDmaPusher> cdma_pusher;
     std::unique_ptr<VideoCore::RendererBase> renderer;
+    const bool use_nvdec;
 
 private:
     /// Mapping of command subchannels to their bound engine ids
@@ -372,6 +388,7 @@ private:
     std::array<std::list<u32>, Service::Nvidia::MaxSyncPoints> syncpt_interrupts;
 
     std::mutex sync_mutex;
+    std::mutex device_mutex;
 
     std::condition_variable sync_cv;
 
diff --git a/src/video_core/gpu_asynch.cpp b/src/video_core/gpu_asynch.cpp
index 70a3d5738..a9baaf7ef 100644
--- a/src/video_core/gpu_asynch.cpp
+++ b/src/video_core/gpu_asynch.cpp
@@ -10,12 +10,13 @@
 
 namespace VideoCommon {
 
-GPUAsynch::GPUAsynch(Core::System& system) : GPU{system, true}, gpu_thread{system} {}
+GPUAsynch::GPUAsynch(Core::System& system, bool use_nvdec)
+    : GPU{system, true, use_nvdec}, gpu_thread{system} {}
 
 GPUAsynch::~GPUAsynch() = default;
 
 void GPUAsynch::Start() {
-    gpu_thread.StartThread(*renderer, renderer->Context(), *dma_pusher);
+    gpu_thread.StartThread(*renderer, renderer->Context(), *dma_pusher, *cdma_pusher);
     cpu_context = renderer->GetRenderWindow().CreateSharedContext();
     cpu_context->MakeCurrent();
 }
@@ -32,6 +33,27 @@ void GPUAsynch::PushGPUEntries(Tegra::CommandList&& entries) {
     gpu_thread.SubmitList(std::move(entries));
 }
 
+void GPUAsynch::PushCommandBuffer(Tegra::ChCommandHeaderList& entries) {
+    if (!use_nvdec) {
+        return;
+    }
+    // This condition fires when a video stream ends, clear all intermediary data
+    if (entries[0].raw == 0xDEADB33F) {
+        cdma_pusher.reset();
+        return;
+    }
+    if (!cdma_pusher) {
+        cdma_pusher = std::make_unique<Tegra::CDmaPusher>(*this);
+    }
+
+    // SubmitCommandBuffer would make the nvdec operations async, this is not currently working
+    // TODO(ameerj): RE proper async nvdec operation
+    // gpu_thread.SubmitCommandBuffer(std::move(entries));
+
+    cdma_pusher->Push(std::move(entries));
+    cdma_pusher->DispatchCalls();
+}
+
 void GPUAsynch::SwapBuffers(const Tegra::FramebufferConfig* framebuffer) {
     gpu_thread.SwapBuffers(framebuffer);
 }
diff --git a/src/video_core/gpu_asynch.h b/src/video_core/gpu_asynch.h
index f89c855a5..0c0872e73 100644
--- a/src/video_core/gpu_asynch.h
+++ b/src/video_core/gpu_asynch.h
@@ -20,13 +20,14 @@ namespace VideoCommon {
 /// Implementation of GPU interface that runs the GPU asynchronously
 class GPUAsynch final : public Tegra::GPU {
 public:
-    explicit GPUAsynch(Core::System& system);
+    explicit GPUAsynch(Core::System& system, bool use_nvdec);
     ~GPUAsynch() override;
 
     void Start() override;
     void ObtainContext() override;
     void ReleaseContext() override;
     void PushGPUEntries(Tegra::CommandList&& entries) override;
+    void PushCommandBuffer(Tegra::ChCommandHeaderList& entries) override;
     void SwapBuffers(const Tegra::FramebufferConfig* framebuffer) override;
     void FlushRegion(VAddr addr, u64 size) override;
     void InvalidateRegion(VAddr addr, u64 size) override;
diff --git a/src/video_core/gpu_synch.cpp b/src/video_core/gpu_synch.cpp
index 1ca47ddef..ecf7bbdf3 100644
--- a/src/video_core/gpu_synch.cpp
+++ b/src/video_core/gpu_synch.cpp
@@ -7,7 +7,7 @@
 
 namespace VideoCommon {
 
-GPUSynch::GPUSynch(Core::System& system) : GPU{system, false} {}
+GPUSynch::GPUSynch(Core::System& system, bool use_nvdec) : GPU{system, false, use_nvdec} {}
 
 GPUSynch::~GPUSynch() = default;
 
@@ -26,6 +26,22 @@ void GPUSynch::PushGPUEntries(Tegra::CommandList&& entries) {
     dma_pusher->DispatchCalls();
 }
 
+void GPUSynch::PushCommandBuffer(Tegra::ChCommandHeaderList& entries) {
+    if (!use_nvdec) {
+        return;
+    }
+    // This condition fires when a video stream ends, clears all intermediary data
+    if (entries[0].raw == 0xDEADB33F) {
+        cdma_pusher.reset();
+        return;
+    }
+    if (!cdma_pusher) {
+        cdma_pusher = std::make_unique<Tegra::CDmaPusher>(*this);
+    }
+    cdma_pusher->Push(std::move(entries));
+    cdma_pusher->DispatchCalls();
+}
+
 void GPUSynch::SwapBuffers(const Tegra::FramebufferConfig* framebuffer) {
     renderer->SwapBuffers(framebuffer);
 }
diff --git a/src/video_core/gpu_synch.h b/src/video_core/gpu_synch.h
index 297258cb1..9d778c71a 100644
--- a/src/video_core/gpu_synch.h
+++ b/src/video_core/gpu_synch.h
@@ -19,13 +19,14 @@ namespace VideoCommon {
 /// Implementation of GPU interface that runs the GPU synchronously
 class GPUSynch final : public Tegra::GPU {
 public:
-    explicit GPUSynch(Core::System& system);
+    explicit GPUSynch(Core::System& system, bool use_nvdec);
     ~GPUSynch() override;
 
     void Start() override;
     void ObtainContext() override;
     void ReleaseContext() override;
     void PushGPUEntries(Tegra::CommandList&& entries) override;
+    void PushCommandBuffer(Tegra::ChCommandHeaderList& entries) override;
     void SwapBuffers(const Tegra::FramebufferConfig* framebuffer) override;
     void FlushRegion(VAddr addr, u64 size) override;
     void InvalidateRegion(VAddr addr, u64 size) override;
diff --git a/src/video_core/gpu_thread.cpp b/src/video_core/gpu_thread.cpp
index bf761abf2..4b8f58283 100644
--- a/src/video_core/gpu_thread.cpp
+++ b/src/video_core/gpu_thread.cpp
@@ -18,7 +18,7 @@ namespace VideoCommon::GPUThread {
 /// Runs the GPU thread
 static void RunThread(Core::System& system, VideoCore::RendererBase& renderer,
                       Core::Frontend::GraphicsContext& context, Tegra::DmaPusher& dma_pusher,
-                      SynchState& state) {
+                      SynchState& state, Tegra::CDmaPusher& cdma_pusher) {
     std::string name = "yuzu:GPU";
     MicroProfileOnThreadCreate(name.c_str());
     Common::SetCurrentThreadName(name.c_str());
@@ -42,6 +42,10 @@ static void RunThread(Core::System& system, VideoCore::RendererBase& renderer,
         if (const auto submit_list = std::get_if<SubmitListCommand>(&next.data)) {
             dma_pusher.Push(std::move(submit_list->entries));
             dma_pusher.DispatchCalls();
+        } else if (const auto command_list = std::get_if<SubmitChCommandEntries>(&next.data)) {
+            // NVDEC
+            cdma_pusher.Push(std::move(command_list->entries));
+            cdma_pusher.DispatchCalls();
         } else if (const auto data = std::get_if<SwapBuffersCommand>(&next.data)) {
             renderer.SwapBuffers(data->framebuffer ? &*data->framebuffer : nullptr);
         } else if (std::holds_alternative<OnCommandListEndCommand>(next.data)) {
@@ -75,15 +79,19 @@ ThreadManager::~ThreadManager() {
 
 void ThreadManager::StartThread(VideoCore::RendererBase& renderer,
                                 Core::Frontend::GraphicsContext& context,
-                                Tegra::DmaPusher& dma_pusher) {
-    thread = std::thread{RunThread,         std::ref(system),     std::ref(renderer),
-                         std::ref(context), std::ref(dma_pusher), std::ref(state)};
+                                Tegra::DmaPusher& dma_pusher, Tegra::CDmaPusher& cdma_pusher) {
+    thread = std::thread(RunThread, std::ref(system), std::ref(renderer), std::ref(context),
+                         std::ref(dma_pusher), std::ref(state), std::ref(cdma_pusher));
 }
 
 void ThreadManager::SubmitList(Tegra::CommandList&& entries) {
     PushCommand(SubmitListCommand(std::move(entries)));
 }
 
+void ThreadManager::SubmitCommandBuffer(Tegra::ChCommandHeaderList&& entries) {
+    PushCommand(SubmitChCommandEntries(std::move(entries)));
+}
+
 void ThreadManager::SwapBuffers(const Tegra::FramebufferConfig* framebuffer) {
     PushCommand(SwapBuffersCommand(framebuffer ? std::make_optional(*framebuffer) : std::nullopt));
 }
diff --git a/src/video_core/gpu_thread.h b/src/video_core/gpu_thread.h
index 5a28335d6..32a34e3a7 100644
--- a/src/video_core/gpu_thread.h
+++ b/src/video_core/gpu_thread.h
@@ -37,6 +37,14 @@ struct SubmitListCommand final {
     Tegra::CommandList entries;
 };
 
+/// Command to signal to the GPU thread that a cdma command list is ready for processing
+struct SubmitChCommandEntries final {
+    explicit SubmitChCommandEntries(Tegra::ChCommandHeaderList&& entries)
+        : entries{std::move(entries)} {}
+
+    Tegra::ChCommandHeaderList entries;
+};
+
 /// Command to signal to the GPU thread that a swap buffers is pending
 struct SwapBuffersCommand final {
     explicit SwapBuffersCommand(std::optional<const Tegra::FramebufferConfig> framebuffer)
@@ -77,9 +85,9 @@ struct OnCommandListEndCommand final {};
 struct GPUTickCommand final {};
 
 using CommandData =
-    std::variant<EndProcessingCommand, SubmitListCommand, SwapBuffersCommand, FlushRegionCommand,
-                 InvalidateRegionCommand, FlushAndInvalidateRegionCommand, OnCommandListEndCommand,
-                 GPUTickCommand>;
+    std::variant<EndProcessingCommand, SubmitListCommand, SubmitChCommandEntries,
+                 SwapBuffersCommand, FlushRegionCommand, InvalidateRegionCommand,
+                 FlushAndInvalidateRegionCommand, OnCommandListEndCommand, GPUTickCommand>;
 
 struct CommandDataContainer {
     CommandDataContainer() = default;
@@ -109,11 +117,14 @@ public:
 
     /// Creates and starts the GPU thread.
     void StartThread(VideoCore::RendererBase& renderer, Core::Frontend::GraphicsContext& context,
-                     Tegra::DmaPusher& dma_pusher);
+                     Tegra::DmaPusher& dma_pusher, Tegra::CDmaPusher& cdma_pusher);
 
     /// Push GPU command entries to be processed
     void SubmitList(Tegra::CommandList&& entries);
 
+    /// Push GPU CDMA command buffer entries to be processed
+    void SubmitCommandBuffer(Tegra::ChCommandHeaderList&& entries);
+
     /// Swap buffers (render frame)
     void SwapBuffers(const Tegra::FramebufferConfig* framebuffer);
 
diff --git a/src/video_core/memory_manager.cpp b/src/video_core/memory_manager.cpp
index 02cf53d15..6e70bd362 100644
--- a/src/video_core/memory_manager.cpp
+++ b/src/video_core/memory_manager.cpp
@@ -11,6 +11,7 @@
 #include "video_core/gpu.h"
 #include "video_core/memory_manager.h"
 #include "video_core/rasterizer_interface.h"
+#include "video_core/renderer_base.h"
 
 namespace Tegra {
 
@@ -44,6 +45,12 @@ GPUVAddr MemoryManager::MapAllocate(VAddr cpu_addr, std::size_t size, std::size_
     return Map(cpu_addr, *FindFreeRange(size, align), size);
 }
 
+GPUVAddr MemoryManager::MapAllocate32(VAddr cpu_addr, std::size_t size) {
+    const std::optional<GPUVAddr> gpu_addr = FindFreeRange(size, 1, true);
+    ASSERT(gpu_addr);
+    return Map(cpu_addr, *gpu_addr, size);
+}
+
 void MemoryManager::Unmap(GPUVAddr gpu_addr, std::size_t size) {
     if (!size) {
         return;
@@ -108,7 +115,8 @@ void MemoryManager::SetPageEntry(GPUVAddr gpu_addr, PageEntry page_entry, std::s
     page_table[PageEntryIndex(gpu_addr)] = page_entry;
 }
 
-std::optional<GPUVAddr> MemoryManager::FindFreeRange(std::size_t size, std::size_t align) const {
+std::optional<GPUVAddr> MemoryManager::FindFreeRange(std::size_t size, std::size_t align,
+                                                     bool start_32bit_address) const {
     if (!align) {
         align = page_size;
     } else {
@@ -116,7 +124,7 @@ std::optional<GPUVAddr> MemoryManager::FindFreeRange(std::size_t size, std::size
     }
 
     u64 available_size{};
-    GPUVAddr gpu_addr{address_space_start};
+    GPUVAddr gpu_addr{start_32bit_address ? address_space_start_low : address_space_start};
     while (gpu_addr + available_size < address_space_size) {
         if (GetPageEntry(gpu_addr + available_size).IsUnmapped()) {
             available_size += page_size;
diff --git a/src/video_core/memory_manager.h b/src/video_core/memory_manager.h
index 53c8d122a..c078193d9 100644
--- a/src/video_core/memory_manager.h
+++ b/src/video_core/memory_manager.h
@@ -116,6 +116,7 @@ public:
 
     [[nodiscard]] GPUVAddr Map(VAddr cpu_addr, GPUVAddr gpu_addr, std::size_t size);
     [[nodiscard]] GPUVAddr MapAllocate(VAddr cpu_addr, std::size_t size, std::size_t align);
+    [[nodiscard]] GPUVAddr MapAllocate32(VAddr cpu_addr, std::size_t size);
     [[nodiscard]] std::optional<GPUVAddr> AllocateFixed(GPUVAddr gpu_addr, std::size_t size);
     [[nodiscard]] GPUVAddr Allocate(std::size_t size, std::size_t align);
     void Unmap(GPUVAddr gpu_addr, std::size_t size);
@@ -124,7 +125,8 @@ private:
     [[nodiscard]] PageEntry GetPageEntry(GPUVAddr gpu_addr) const;
     void SetPageEntry(GPUVAddr gpu_addr, PageEntry page_entry, std::size_t size = page_size);
     GPUVAddr UpdateRange(GPUVAddr gpu_addr, PageEntry page_entry, std::size_t size);
-    [[nodiscard]] std::optional<GPUVAddr> FindFreeRange(std::size_t size, std::size_t align) const;
+    [[nodiscard]] std::optional<GPUVAddr> FindFreeRange(std::size_t size, std::size_t align,
+                                                        bool start_32bit_address = false) const;
 
     void TryLockPage(PageEntry page_entry, std::size_t size);
     void TryUnlockPage(PageEntry page_entry, std::size_t size);
@@ -135,6 +137,7 @@ private:
 
     static constexpr u64 address_space_size = 1ULL << 40;
     static constexpr u64 address_space_start = 1ULL << 32;
+    static constexpr u64 address_space_start_low = 1ULL << 16;
     static constexpr u64 page_bits{16};
     static constexpr u64 page_size{1 << page_bits};
     static constexpr u64 page_mask{page_size - 1};
diff --git a/src/video_core/video_core.cpp b/src/video_core/video_core.cpp
index a14df06a3..dd5cee4a1 100644
--- a/src/video_core/video_core.cpp
+++ b/src/video_core/video_core.cpp
@@ -44,10 +44,11 @@ namespace VideoCore {
 
 std::unique_ptr<Tegra::GPU> CreateGPU(Core::Frontend::EmuWindow& emu_window, Core::System& system) {
     std::unique_ptr<Tegra::GPU> gpu;
+    const bool use_nvdec = Settings::values.use_nvdec_emulation.GetValue();
     if (Settings::values.use_asynchronous_gpu_emulation.GetValue()) {
-        gpu = std::make_unique<VideoCommon::GPUAsynch>(system);
+        gpu = std::make_unique<VideoCommon::GPUAsynch>(system, use_nvdec);
     } else {
-        gpu = std::make_unique<VideoCommon::GPUSynch>(system);
+        gpu = std::make_unique<VideoCommon::GPUSynch>(system, use_nvdec);
     }
 
     auto context = emu_window.CreateSharedContext();