fix nvdec

Signed-off-by: lizzie <lizzie@eden-emu.dev>

src/core/hle/service/nvdrv/core/nvmap.cpp

@@ -89,7 +89,7 @@ void NvMap::UnmapHandle(Handle& handle_description) {
 
     // Free and unmap the handle from Host1x GMMU
     if (handle_description.pin_virt_address) {
-        host1x.GMMU().Unmap(static_cast<GPUVAddr>(handle_description.pin_virt_address),
+        host1x.gmmu_manager.Unmap(static_cast<GPUVAddr>(handle_description.pin_virt_address),
                             handle_description.aligned_size);
         host1x.Allocator().Free(handle_description.pin_virt_address,
                                 static_cast<u32>(handle_description.aligned_size));
@@ -169,12 +169,8 @@ DAddr NvMap::PinHandle(NvMap::Handle::Id handle, bool low_area_pin) {
     std::scoped_lock lock(handle_description->mutex);
     const auto map_low_area = [&] {
         if (handle_description->pin_virt_address == 0) {
-            auto& gmmu_allocator = host1x.Allocator();
-            auto& gmmu = host1x.GMMU();
-            u32 address =
-                gmmu_allocator.Allocate(static_cast<u32>(handle_description->aligned_size));
-            gmmu.Map(static_cast<GPUVAddr>(address), handle_description->d_address,
-                     handle_description->aligned_size);
+            u32 address = host1x.Allocator().Allocate(u32(handle_description->aligned_size));
+            host1x.gmmu_manager.Map(GPUVAddr(address), handle_description->d_address, handle_description->aligned_size);
             handle_description->pin_virt_address = address;
         }
     };

src/video_core/CMakeLists.txt

@@ -8,7 +8,7 @@ add_subdirectory(host_shaders)
 add_subdirectory(gpu_logging)
 
 if(LIBVA_FOUND)
-    set_source_files_properties(host1x/ffmpeg/ffmpeg.cpp
+    set_source_files_properties(host1x/ffmpeg.cpp
         PROPERTIES COMPILE_DEFINITIONS LIBVA_FOUND=1)
     list(APPEND FFmpeg_LIBRARIES ${LIBVA_LIBRARIES})
 endif()
@@ -72,9 +72,9 @@ add_library(video_core STATIC
     host1x/codecs/vp8.h
     host1x/codecs/vp9.cpp
     host1x/codecs/vp9.h
-    host1x/codecs/vp9_types.h
-    host1x/ffmpeg/ffmpeg.cpp
-    host1x/ffmpeg/ffmpeg.h
+    host1x/codec_types.h
+    host1x/ffmpeg.cpp
+    host1x/ffmpeg.h
     host1x/control.cpp
     host1x/control.h
     host1x/gpu_device_memory_manager.cpp

src/video_core/cdma_pusher.cpp

@@ -1,4 +1,4 @@
-// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 
 // SPDX-FileCopyrightText: Ryujinx Team and Contributors
@@ -20,9 +20,10 @@
 namespace Tegra {
 
 CDmaPusher::CDmaPusher(Host1x::Host1x& host1x_, s32 id)
-    : host1x{host1x_}, memory_manager{host1x.GMMU()},
-      host_processor{std::make_unique<Host1x::Control>(host1x_)}, current_class{
-                                                                      static_cast<ChClassId>(id)} {
+    : host_processor{std::make_unique<Host1x::Control>(host1x_)}
+    , host1x{host1x_}
+    , current_class{ChClassId(id)}
+{
     thread = std::jthread([this](std::stop_token stop_token) { ProcessEntries(stop_token); });
 }
 

src/video_core/cdma_pusher.h

@@ -1,3 +1,6 @@
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: Copyright 2020 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
@@ -117,9 +120,6 @@ protected:
 
     virtual void ProcessMethod(u32 method, u32 arg) = 0;
 
-    Host1x::Host1x& host1x;
-    Tegra::MemoryManager& memory_manager;
-
 private:
     /// Process the command entry
     void ProcessEntries(std::stop_token stop_token);
@@ -127,14 +127,14 @@ private:
     /// Invoke command class devices to execute the command based on the current state
     void ExecuteCommand(u32 state_offset, u32 data);
 
-    std::unique_ptr<Host1x::Control> host_processor;
-
-    std::mutex command_mutex;
-    std::condition_variable_any command_cv;
-    std::deque<ChCommandHeaderList> command_lists;
-    std::jthread thread;
-
+protected:
     ThiRegisters thi_regs{};
+    std::deque<ChCommandHeaderList> command_lists;
+    std::condition_variable_any command_cv;
+    std::jthread thread;
+    std::unique_ptr<Host1x::Control> host_processor;
+    std::mutex command_mutex;
+    Host1x::Host1x& host1x;
     ChClassId current_class;
 };
 

src/video_core/gpu.cpp

@@ -89,7 +89,7 @@ struct GPU::Impl {
         renderer = std::move(renderer_);
         rasterizer = renderer->ReadRasterizer();
         host1x.MemoryManager().BindInterface(rasterizer);
-        host1x.GMMU().BindRasterizer(rasterizer);
+        host1x.gmmu_manager.BindRasterizer(rasterizer);
     }
 
     /// Flush all current written commands into the host GPU for execution.

src/video_core/host1x/codec_types.h

@@ -0,0 +1,542 @@
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+// SPDX-FileCopyrightText: Copyright 2020 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+#include <array>
+#include <vector>
+
+#include "common/bit_field.h"
+#include "common/common_funcs.h"
+#include "common/common_types.h"
+
+namespace Tegra {
+
+namespace Decoders {
+
+struct Offset {
+    constexpr u32 Address() const noexcept {
+        return offset << 8;
+    }
+
+private:
+    u32 offset;
+};
+static_assert(std::is_trivial_v<Offset>, "Offset must be trivial");
+static_assert(sizeof(Offset) == 0x4, "Offset has the wrong size!");
+
+struct H264ParameterSet {
+    s32 log2_max_pic_order_cnt_lsb_minus4; ///< 0x00
+    s32 delta_pic_order_always_zero_flag;  ///< 0x04
+    s32 frame_mbs_only_flag;               ///< 0x08
+    u32 pic_width_in_mbs;                  ///< 0x0C
+    u32 frame_height_in_mbs;               ///< 0x10
+    union {                                ///< 0x14
+        BitField<0, 2, u32> tile_format;
+        BitField<2, 3, u32> gob_height;
+        BitField<5, 27, u32> reserved_surface_format;
+    };
+    u32 entropy_coding_mode_flag;               ///< 0x18
+    s32 pic_order_present_flag;                 ///< 0x1C
+    s32 num_refidx_l0_default_active;           ///< 0x20
+    s32 num_refidx_l1_default_active;           ///< 0x24
+    s32 deblocking_filter_control_present_flag; ///< 0x28
+    s32 redundant_pic_cnt_present_flag;         ///< 0x2C
+    u32 transform_8x8_mode_flag;                ///< 0x30
+    u32 pitch_luma;                             ///< 0x34
+    u32 pitch_chroma;                           ///< 0x38
+    Offset luma_top_offset;                     ///< 0x3C
+    Offset luma_bot_offset;                     ///< 0x40
+    Offset luma_frame_offset;                   ///< 0x44
+    Offset chroma_top_offset;                   ///< 0x48
+    Offset chroma_bot_offset;                   ///< 0x4C
+    Offset chroma_frame_offset;                 ///< 0x50
+    u32 hist_buffer_size;                       ///< 0x54
+    union {                                     ///< 0x58
+        union {
+            BitField<0, 1, u64> mbaff_frame;
+            BitField<1, 1, u64> direct_8x8_inference;
+            BitField<2, 1, u64> weighted_pred;
+            BitField<3, 1, u64> constrained_intra_pred;
+            BitField<4, 1, u64> ref_pic;
+            BitField<5, 1, u64> field_pic;
+            BitField<6, 1, u64> bottom_field;
+            BitField<7, 1, u64> second_field;
+        } flags;
+        BitField<8, 4, u64> log2_max_frame_num_minus4;
+        BitField<12, 2, u64> chroma_format_idc;
+        BitField<14, 2, u64> pic_order_cnt_type;
+        BitField<16, 6, s64> pic_init_qp_minus26;
+        BitField<22, 5, s64> chroma_qp_index_offset;
+        BitField<27, 5, s64> second_chroma_qp_index_offset;
+        BitField<32, 2, u64> weighted_bipred_idc;
+        BitField<34, 7, u64> curr_pic_idx;
+        BitField<41, 5, u64> curr_col_idx;
+        BitField<46, 16, u64> frame_number;
+        BitField<62, 1, u64> frame_surfaces;
+        BitField<63, 1, u64> output_memory_layout;
+    };
+};
+static_assert(sizeof(H264ParameterSet) == 0x60, "H264ParameterSet is an invalid size");
+
+#define ASSERT_POSITION(field_name, position)                                                      \
+    static_assert(offsetof(H264ParameterSet, field_name) == position,                              \
+                  "Field " #field_name " has invalid position")
+
+ASSERT_POSITION(log2_max_pic_order_cnt_lsb_minus4, 0x00);
+ASSERT_POSITION(delta_pic_order_always_zero_flag, 0x04);
+ASSERT_POSITION(frame_mbs_only_flag, 0x08);
+ASSERT_POSITION(pic_width_in_mbs, 0x0C);
+ASSERT_POSITION(frame_height_in_mbs, 0x10);
+ASSERT_POSITION(tile_format, 0x14);
+ASSERT_POSITION(entropy_coding_mode_flag, 0x18);
+ASSERT_POSITION(pic_order_present_flag, 0x1C);
+ASSERT_POSITION(num_refidx_l0_default_active, 0x20);
+ASSERT_POSITION(num_refidx_l1_default_active, 0x24);
+ASSERT_POSITION(deblocking_filter_control_present_flag, 0x28);
+ASSERT_POSITION(redundant_pic_cnt_present_flag, 0x2C);
+ASSERT_POSITION(transform_8x8_mode_flag, 0x30);
+ASSERT_POSITION(pitch_luma, 0x34);
+ASSERT_POSITION(pitch_chroma, 0x38);
+ASSERT_POSITION(luma_top_offset, 0x3C);
+ASSERT_POSITION(luma_bot_offset, 0x40);
+ASSERT_POSITION(luma_frame_offset, 0x44);
+ASSERT_POSITION(chroma_top_offset, 0x48);
+ASSERT_POSITION(chroma_bot_offset, 0x4C);
+ASSERT_POSITION(chroma_frame_offset, 0x50);
+ASSERT_POSITION(hist_buffer_size, 0x54);
+ASSERT_POSITION(flags, 0x58);
+#undef ASSERT_POSITION
+
+struct DpbEntry {
+    union {
+        BitField<0, 7, u32> index;
+        BitField<7, 5, u32> col_idx;
+        BitField<12, 2, u32> state;
+        BitField<14, 1, u32> is_long_term;
+        BitField<15, 1, u32> non_existing;
+        BitField<16, 1, u32> is_field;
+        BitField<17, 4, u32> top_field_marking;
+        BitField<21, 4, u32> bottom_field_marking;
+        BitField<25, 1, u32> output_memory_layout;
+        BitField<26, 6, u32> reserved;
+    } flags;
+    std::array<u32, 2> field_order_cnt;
+    u32 frame_idx;
+};
+static_assert(sizeof(DpbEntry) == 0x10, "DpbEntry has the wrong size!");
+
+struct DisplayParam {
+    union {
+        BitField<0, 1, u32> enable_tf_output;
+        BitField<1, 1, u32> vc1_map_y_flag;
+        BitField<2, 3, u32> map_y_value;
+        BitField<5, 1, u32> vc1_map_uv_flag;
+        BitField<6, 3, u32> map_uv_value;
+        BitField<9, 8, u32> out_stride;
+        BitField<17, 3, u32> tiling_format;
+        BitField<20, 1, u32> output_structure; // 0=frame, 1=field
+        BitField<21, 11, u32> reserved0;
+    };
+    std::array<s32, 2> output_top;
+    std::array<s32, 2> output_bottom;
+    union {
+        BitField<0, 1, u32> enable_histogram;
+        BitField<1, 12, u32> histogram_start_x;
+        BitField<13, 12, u32> histogram_start_y;
+        BitField<25, 7, u32> reserved1;
+    };
+    union {
+        BitField<0, 12, u32> histogram_end_x;
+        BitField<12, 12, u32> histogram_end_y;
+        BitField<24, 8, u32> reserved2;
+    };
+};
+static_assert(sizeof(DisplayParam) == 0x1C, "DisplayParam has the wrong size!");
+
+struct H264DecoderContext {
+    INSERT_PADDING_WORDS_NOINIT(13);                        ///< 0x0000
+    std::array<u8, 16> eos;                                 ///< 0x0034
+    u8 explicit_eos_present_flag;                           ///< 0x0044
+    u8 hint_dump_en;                                        ///< 0x0045
+    INSERT_PADDING_BYTES_NOINIT(2);                         ///< 0x0046
+    u32 stream_len;                                         ///< 0x0048
+    u32 slice_count;                                        ///< 0x004C
+    u32 mbhist_buffer_size;                                 ///< 0x0050
+    u32 gptimer_timeout_value;                              ///< 0x0054
+    H264ParameterSet h264_parameter_set;                    ///< 0x0058
+    std::array<s32, 2> curr_field_order_cnt;                ///< 0x00B8
+    std::array<DpbEntry, 16> dpb;                           ///< 0x00C0
+    std::array<u8, 0x60> weight_scale_4x4;                  ///< 0x01C0
+    std::array<u8, 0x80> weight_scale_8x8;                  ///< 0x0220
+    std::array<u8, 2> num_inter_view_refs_lX;               ///< 0x02A0
+    std::array<u8, 14> reserved2;                           ///< 0x02A2
+    std::array<std::array<s8, 16>, 2> inter_view_refidx_lX; ///< 0x02B0
+    union {                                                 ///< 0x02D0
+        BitField<0, 1, u32> lossless_ipred8x8_filter_enable;
+        BitField<1, 1, u32> qpprime_y_zero_transform_bypass_flag;
+        BitField<2, 30, u32> reserved3;
+    };
+    DisplayParam display_param;   ///< 0x02D4
+    std::array<u32, 3> reserved4; ///< 0x02F0
+};
+static_assert(sizeof(H264DecoderContext) == 0x2FC, "H264DecoderContext is an invalid size");
+
+#define ASSERT_POSITION(field_name, position)                                                      \
+    static_assert(offsetof(H264DecoderContext, field_name) == position,                            \
+                  "Field " #field_name " has invalid position")
+
+ASSERT_POSITION(stream_len, 0x48);
+ASSERT_POSITION(h264_parameter_set, 0x58);
+ASSERT_POSITION(dpb, 0xC0);
+ASSERT_POSITION(weight_scale_4x4, 0x1C0);
+#undef ASSERT_POSITION
+
+enum class Vp9SurfaceIndex : u32 {
+    Last = 0,
+    Golden = 1,
+    AltRef = 2,
+    Current = 3,
+};
+
+struct Vp9FrameDimensions {
+    s16 width;
+    s16 height;
+    s16 luma_pitch;
+    s16 chroma_pitch;
+};
+static_assert(sizeof(Vp9FrameDimensions) == 0x8, "Vp9 Vp9FrameDimensions is an invalid size");
+
+enum class FrameFlags : u32 {
+    IsKeyFrame = 1 << 0,
+    LastFrameIsKeyFrame = 1 << 1,
+    FrameSizeChanged = 1 << 2,
+    ErrorResilientMode = 1 << 3,
+    LastShowFrame = 1 << 4,
+    IntraOnly = 1 << 5,
+};
+DECLARE_ENUM_FLAG_OPERATORS(FrameFlags)
+
+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
+};
+
+struct Segmentation {
+    constexpr bool operator==(const Segmentation& rhs) const = default;
+
+    u8 enabled;
+    u8 update_map;
+    u8 temporal_update;
+    u8 abs_delta;
+    std::array<std::array<u8, 4>, 8> feature_enabled;
+    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;           ///< 0x0000
+    std::array<u8, 64> partition_prob;        ///< 0x0024
+    std::array<u8, 1728> coef_probs;          ///< 0x0064
+    std::array<u8, 8> switchable_interp_prob; ///< 0x0724
+    std::array<u8, 28> inter_mode_prob;       ///< 0x072C
+    std::array<u8, 4> intra_inter_prob;       ///< 0x0748
+    std::array<u8, 5> comp_inter_prob;        ///< 0x074C
+    std::array<u8, 10> single_ref_prob;       ///< 0x0751
+    std::array<u8, 5> comp_ref_prob;          ///< 0x075B
+    std::array<u8, 6> tx_32x32_prob;          ///< 0x0760
+    std::array<u8, 4> tx_16x16_prob;          ///< 0x0766
+    std::array<u8, 2> tx_8x8_prob;            ///< 0x076A
+    std::array<u8, 3> skip_probs;             ///< 0x076C
+    std::array<u8, 3> joints;                 ///< 0x076F
+    std::array<u8, 2> sign;                   ///< 0x0772
+    std::array<u8, 20> classes;               ///< 0x0774
+    std::array<u8, 2> class_0;                ///< 0x0788
+    std::array<u8, 20> prob_bits;             ///< 0x078A
+    std::array<u8, 12> class_0_fr;            ///< 0x079E
+    std::array<u8, 6> fr;                     ///< 0x07AA
+    std::array<u8, 2> class_0_hp;             ///< 0x07B0
+    std::array<u8, 2> high_precision;         ///< 0x07B2
+};
+static_assert(sizeof(Vp9EntropyProbs) == 0x7B4, "Vp9EntropyProbs is an invalid size");
+
+struct Vp9PictureInfo {
+    u32 bitstream_size;
+    std::array<u64, 4> frame_offsets;
+    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;
+    s32 transform_mode;
+    s32 interp_filter;
+    s32 reference_mode;
+    s32 log2_tile_cols;
+    s32 log2_tile_rows;
+    std::array<s8, 4> ref_deltas;
+    std::array<s8, 2> mode_deltas;
+    Vp9EntropyProbs entropy;
+    Vp9FrameDimensions frame_size;
+    u8 first_level;
+    u8 sharpness_level;
+    bool is_key_frame;
+    bool intra_only;
+    bool last_frame_was_key;
+    bool error_resilient_mode;
+    bool last_frame_shown;
+    bool show_frame;
+    bool lossless;
+    bool allow_high_precision_mv;
+    bool segment_enabled;
+    bool mode_ref_delta_enabled;
+};
+
+struct Vp9FrameContainer {
+    Vp9PictureInfo info{};
+    std::vector<u8> bit_stream;
+};
+
+struct PictureInfo {
+    INSERT_PADDING_WORDS_NOINIT(12);       ///< 0x00
+    u32 bitstream_size;                    ///< 0x30
+    INSERT_PADDING_WORDS_NOINIT(5);        ///< 0x34
+    Vp9FrameDimensions last_frame_size;    ///< 0x48
+    Vp9FrameDimensions golden_frame_size;  ///< 0x50
+    Vp9FrameDimensions alt_frame_size;     ///< 0x58
+    Vp9FrameDimensions current_frame_size; ///< 0x60
+    FrameFlags vp9_flags;                  ///< 0x68
+    std::array<s8, 4> ref_frame_sign_bias; ///< 0x6C
+    u8 first_level;                        ///< 0x70
+    u8 sharpness_level;                    ///< 0x71
+    u8 base_q_index;                       ///< 0x72
+    u8 y_dc_delta_q;                       ///< 0x73
+    u8 uv_ac_delta_q;                      ///< 0x74
+    u8 uv_dc_delta_q;                      ///< 0x75
+    u8 lossless;                           ///< 0x76
+    u8 tx_mode;                            ///< 0x77
+    u8 allow_high_precision_mv;            ///< 0x78
+    u8 interp_filter;                      ///< 0x79
+    u8 reference_mode;                     ///< 0x7A
+    INSERT_PADDING_BYTES_NOINIT(3);        ///< 0x7B
+    u8 log2_tile_cols;                     ///< 0x7E
+    u8 log2_tile_rows;                     ///< 0x7F
+    Segmentation segmentation;             ///< 0x80
+    LoopFilter loop_filter;                ///< 0xE4
+    INSERT_PADDING_BYTES_NOINIT(21);       ///< 0xEB
+
+    [[nodiscard]] Vp9PictureInfo Convert() const {
+        return {
+            .bitstream_size = bitstream_size,
+            .frame_offsets{},
+            .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,
+            .transform_mode = tx_mode,
+            .interp_filter = interp_filter,
+            .reference_mode = reference_mode,
+            .log2_tile_cols = log2_tile_cols,
+            .log2_tile_rows = log2_tile_rows,
+            .ref_deltas = loop_filter.ref_deltas,
+            .mode_deltas = loop_filter.mode_deltas,
+            .entropy{},
+            .frame_size = current_frame_size,
+            .first_level = first_level,
+            .sharpness_level = sharpness_level,
+            .is_key_frame = True(vp9_flags & FrameFlags::IsKeyFrame),
+            .intra_only = True(vp9_flags & FrameFlags::IntraOnly),
+            .last_frame_was_key = True(vp9_flags & FrameFlags::LastFrameIsKeyFrame),
+            .error_resilient_mode = True(vp9_flags & FrameFlags::ErrorResilientMode),
+            .last_frame_shown = True(vp9_flags & FrameFlags::LastShowFrame),
+            .show_frame = true,
+            .lossless = lossless != 0,
+            .allow_high_precision_mv = allow_high_precision_mv != 0,
+            .segment_enabled = segmentation.enabled != 0,
+            .mode_ref_delta_enabled = loop_filter.mode_ref_delta_enabled != 0,
+        };
+    }
+};
+static_assert(sizeof(PictureInfo) == 0x100, "PictureInfo is an invalid size");
+
+struct EntropyProbs {
+    std::array<u8, 10 * 10 * 8> kf_bmode_prob;         ///< 0x0000
+    std::array<u8, 10 * 10 * 1> kf_bmode_probB;        ///< 0x0320
+    std::array<u8, 3> ref_pred_probs;                  ///< 0x0384
+    std::array<u8, 7> mb_segment_tree_probs;           ///< 0x0387
+    std::array<u8, 3> segment_pred_probs;              ///< 0x038E
+    std::array<u8, 4> ref_scores;                      ///< 0x0391
+    std::array<u8, 2> prob_comppred;                   ///< 0x0395
+    INSERT_PADDING_BYTES_NOINIT(9);                    ///< 0x0397
+    std::array<u8, 10 * 8> kf_uv_mode_prob;            ///< 0x03A0
+    std::array<u8, 10 * 1> kf_uv_mode_probB;           ///< 0x03F0
+    INSERT_PADDING_BYTES_NOINIT(6);                    ///< 0x03FA
+    std::array<u8, 28> inter_mode_prob;                ///< 0x0400
+    std::array<u8, 4> intra_inter_prob;                ///< 0x041C
+    INSERT_PADDING_BYTES_NOINIT(80);                   ///< 0x0420
+    std::array<u8, 2> tx_8x8_prob;                     ///< 0x0470
+    std::array<u8, 4> tx_16x16_prob;                   ///< 0x0472
+    std::array<u8, 6> tx_32x32_prob;                   ///< 0x0476
+    std::array<u8, 4> y_mode_prob_e8;                  ///< 0x047C
+    std::array<std::array<u8, 8>, 4> y_mode_prob_e0e7; ///< 0x0480
+    INSERT_PADDING_BYTES_NOINIT(64);                   ///< 0x04A0
+    std::array<u8, 64> partition_prob;                 ///< 0x04E0
+    INSERT_PADDING_BYTES_NOINIT(10);                   ///< 0x0520
+    std::array<u8, 8> switchable_interp_prob;          ///< 0x052A
+    std::array<u8, 5> comp_inter_prob;                 ///< 0x0532
+    std::array<u8, 3> skip_probs;                      ///< 0x0537
+    INSERT_PADDING_BYTES_NOINIT(1);                    ///< 0x053A
+    std::array<u8, 3> joints;                          ///< 0x053B
+    std::array<u8, 2> sign;                            ///< 0x053E
+    std::array<u8, 2> class_0;                         ///< 0x0540
+    std::array<u8, 6> fr;                              ///< 0x0542
+    std::array<u8, 2> class_0_hp;                      ///< 0x0548
+    std::array<u8, 2> high_precision;                  ///< 0x054A
+    std::array<u8, 20> classes;                        ///< 0x054C
+    std::array<u8, 12> class_0_fr;                     ///< 0x0560
+    std::array<u8, 20> pred_bits;                      ///< 0x056C
+    std::array<u8, 10> single_ref_prob;                ///< 0x0580
+    std::array<u8, 5> comp_ref_prob;                   ///< 0x058A
+    INSERT_PADDING_BYTES_NOINIT(17);                   ///< 0x058F
+    std::array<u8, 2304> coef_probs;                   ///< 0x05A0
+
+    void Convert(Vp9EntropyProbs& fc) {
+        fc.inter_mode_prob = inter_mode_prob;
+        fc.intra_inter_prob = intra_inter_prob;
+        fc.tx_8x8_prob = tx_8x8_prob;
+        fc.tx_16x16_prob = tx_16x16_prob;
+        fc.tx_32x32_prob = tx_32x32_prob;
+
+        for (std::size_t i = 0; i < 4; i++) {
+            for (std::size_t 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];
+            }
+        }
+
+        fc.partition_prob = partition_prob;
+        fc.switchable_interp_prob = switchable_interp_prob;
+        fc.comp_inter_prob = comp_inter_prob;
+        fc.skip_probs = skip_probs;
+        fc.joints = joints;
+        fc.sign = sign;
+        fc.class_0 = class_0;
+        fc.fr = fr;
+        fc.class_0_hp = class_0_hp;
+        fc.high_precision = high_precision;
+        fc.classes = classes;
+        fc.class_0_fr = class_0_fr;
+        fc.prob_bits = pred_bits;
+        fc.single_ref_prob = single_ref_prob;
+        fc.comp_ref_prob = comp_ref_prob;
+
+        // Skip the 4th element as it goes unused
+        for (std::size_t i = 0; i < coef_probs.size(); i += 4) {
+            const std::size_t j = i - i / 4;
+            fc.coef_probs[j] = coef_probs[i];
+            fc.coef_probs[j + 1] = coef_probs[i + 1];
+            fc.coef_probs[j + 2] = coef_probs[i + 2];
+        }
+    }
+};
+static_assert(sizeof(EntropyProbs) == 0xEA0, "EntropyProbs is an invalid size");
+
+enum class Ref { Last, Golden, AltRef };
+
+struct RefPoolElement {
+    s64 frame{};
+    Ref ref{};
+    bool refresh{};
+};
+
+#define ASSERT_POSITION(field_name, position) static_assert(offsetof(Vp9EntropyProbs, field_name) == position)
+ASSERT_POSITION(partition_prob, 0x0024);
+ASSERT_POSITION(switchable_interp_prob, 0x0724);
+ASSERT_POSITION(sign, 0x0772);
+ASSERT_POSITION(class_0_fr, 0x079E);
+ASSERT_POSITION(high_precision, 0x07B2);
+#undef ASSERT_POSITION
+
+#define ASSERT_POSITION(field_name, position) static_assert(offsetof(PictureInfo, field_name) == position)
+ASSERT_POSITION(bitstream_size, 0x30);
+ASSERT_POSITION(last_frame_size, 0x48);
+ASSERT_POSITION(first_level, 0x70);
+ASSERT_POSITION(segmentation, 0x80);
+ASSERT_POSITION(loop_filter, 0xE4);
+#undef ASSERT_POSITION
+
+#define ASSERT_POSITION(field_name, position) static_assert(offsetof(EntropyProbs, field_name) == position)
+
+ASSERT_POSITION(inter_mode_prob, 0x400);
+ASSERT_POSITION(tx_8x8_prob, 0x470);
+ASSERT_POSITION(partition_prob, 0x4E0);
+ASSERT_POSITION(class_0, 0x540);
+ASSERT_POSITION(class_0_fr, 0x560);
+ASSERT_POSITION(coef_probs, 0x5A0);
+#undef ASSERT_POSITION
+
+struct VP8PictureInfo {
+    INSERT_PADDING_WORDS_NOINIT(14);
+    u16 frame_width;  // actual frame width
+    u16 frame_height; // actual frame height
+    u8 key_frame;
+    u8 version;
+    union {
+        u8 raw;
+        BitField<0, 2, u8> tile_format;
+        BitField<2, 3, u8> gob_height;
+        BitField<5, 3, u8> reserved_surface_format;
+    };
+    u8 error_conceal_on;  // 1: error conceal on; 0: off
+    u32 first_part_size;  // the size of first partition(frame header and mb header partition)
+    u32 hist_buffer_size; // in units of 256
+    u32 vld_buffer_size;  // in units of 1
+    // Current frame buffers
+    std::array<u32, 2> frame_stride; // [y_c]
+    u32 luma_top_offset;             // offset of luma top field in units of 256
+    u32 luma_bot_offset;             // offset of luma bottom field in units of 256
+    u32 luma_frame_offset;           // offset of luma frame in units of 256
+    u32 chroma_top_offset;           // offset of chroma top field in units of 256
+    u32 chroma_bot_offset;           // offset of chroma bottom field in units of 256
+    u32 chroma_frame_offset;         // offset of chroma frame in units of 256
+
+    INSERT_PADDING_BYTES_NOINIT(0x1c); // NvdecDisplayParams
+
+    // Decode picture buffer related
+    s8 current_output_memory_layout;
+    // output NV12/NV24 setting. index 0: golden; 1: altref; 2: last
+    std::array<s8, 3> output_memory_layout;
+
+    u8 segmentation_feature_data_update;
+    INSERT_PADDING_BYTES_NOINIT(3);
+
+    // ucode return result
+    u32 result_value;
+    std::array<u32, 8> partition_offset;
+    INSERT_PADDING_WORDS_NOINIT(3);
+};
+static_assert(sizeof(VP8PictureInfo) == 0xc0, "PictureInfo is an invalid size");
+
+}; // namespace Decoders
+}; // namespace Tegra

src/video_core/host1x/codecs/codec.cpp

@@ -1,3 +1,6 @@
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: Copyright 2020 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
@@ -13,9 +16,12 @@
 namespace Tegra {
 
 Codec::Codec(Host1x::Host1x& host1x_, const Host1x::NvdecCommon::NvdecRegisters& regs)
-    : host1x(host1x_), state{regs}, h264_decoder(std::make_unique<Decoder::H264>(host1x)),
-      vp8_decoder(std::make_unique<Decoder::VP8>(host1x)),
-      vp9_decoder(std::make_unique<Decoder::VP9>(host1x)) {}
+    : host1x(host1x_)
+    , state{regs}
+    , h264_decoder(host1x_)
+    , vp8_decoder(host1x_)
+    , vp9_decoder(host1x_)
+{}
 
 Codec::~Codec() = default;
 
@@ -32,13 +38,11 @@ void Codec::SetTargetCodec(Host1x::NvdecCommon::VideoCodec codec) {
 
 void Codec::Decode() {
     const bool is_first_frame = !initialized;
-    if (is_first_frame) {
+    if (is_first_frame)
         Initialize();
-    }
 
-    if (!initialized) {
+    if (!initialized)
         return;
-    }
 
     // Assemble bitstream.
     bool vp9_hidden_frame = false;
@@ -46,13 +50,13 @@ void Codec::Decode() {
     const auto packet_data = [&]() {
         switch (current_codec) {
         case Tegra::Host1x::NvdecCommon::VideoCodec::H264:
-            return h264_decoder->ComposeFrame(state, &configuration_size, is_first_frame);
+            return h264_decoder.ComposeFrame(state, &configuration_size, is_first_frame);
         case Tegra::Host1x::NvdecCommon::VideoCodec::VP8:
-            return vp8_decoder->ComposeFrame(state);
+            return vp8_decoder.ComposeFrame(state);
         case Tegra::Host1x::NvdecCommon::VideoCodec::VP9:
-            vp9_decoder->ComposeFrame(state);
-            vp9_hidden_frame = vp9_decoder->WasFrameHidden();
-            return vp9_decoder->GetFrameBytes();
+            vp9_decoder.ComposeFrame(state);
+            vp9_hidden_frame = vp9_decoder.WasFrameHidden();
+            return vp9_decoder.GetFrameBytes();
         default:
             ASSERT(false);
             return std::span<const u8>{};
@@ -81,19 +85,13 @@ void Codec::Decode() {
 std::unique_ptr<FFmpeg::Frame> Codec::GetCurrentFrame() {
     // Sometimes VIC will request more frames than have been decoded.
     // in this case, return a blank frame and don't overwrite previous data.
-    if (frames.empty()) {
+    if (frames.empty())
         return {};
-    }
-
     auto frame = std::move(frames.front());
     frames.pop();
     return frame;
 }
 
-Host1x::NvdecCommon::VideoCodec Codec::GetCurrentCodec() const {
-    return current_codec;
-}
-
 std::string_view Codec::GetCurrentCodecName() const {
     switch (current_codec) {
     case Host1x::NvdecCommon::VideoCodec::None:

src/video_core/host1x/codecs/codec.h

@@ -1,3 +1,6 @@
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: Copyright 2020 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
@@ -8,17 +11,14 @@
 #include <string_view>
 #include <queue>
 #include "common/common_types.h"
-#include "video_core/host1x/ffmpeg/ffmpeg.h"
+#include "video_core/host1x/codecs/h264.h"
+#include "video_core/host1x/codecs/vp8.h"
+#include "video_core/host1x/codecs/vp9.h"
+#include "video_core/host1x/ffmpeg.h"
 #include "video_core/host1x/nvdec_common.h"
 
 namespace Tegra {
 
-namespace Decoder {
-class H264;
-class VP8;
-class VP9;
-} // namespace Decoder
-
 namespace Host1x {
 class Host1x;
 } // namespace Host1x
@@ -40,9 +40,6 @@ public:
     /// Returns next decoded frame
     [[nodiscard]] std::unique_ptr<FFmpeg::Frame> GetCurrentFrame();
 
-    /// Returns the value of current_codec
-    [[nodiscard]] Host1x::NvdecCommon::VideoCodec GetCurrentCodec() const;
-
     /// Return name of the current codec
     [[nodiscard]] std::string_view GetCurrentCodecName() const;
 
@@ -53,10 +50,9 @@ private:
 
     Host1x::Host1x& host1x;
     const Host1x::NvdecCommon::NvdecRegisters& state;
-    std::unique_ptr<Decoder::H264> h264_decoder;
-    std::unique_ptr<Decoder::VP8> vp8_decoder;
-    std::unique_ptr<Decoder::VP9> vp9_decoder;
-
+    Decoders::H264 h264_decoder;
+    Decoders::VP8 vp8_decoder;
+    Decoders::VP9 vp9_decoder;
     std::queue<std::unique_ptr<FFmpeg::Frame>> frames{};
 };
 

src/video_core/host1x/codecs/decoder.cpp

@@ -1,4 +1,4 @@
-// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 
 // SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project
@@ -12,10 +12,11 @@
 
 namespace Tegra {
 
-Decoder::Decoder(Host1x::Host1x& host1x_, s32 id_, const Host1x::NvdecCommon::NvdecRegisters& regs_,
-                 Host1x::FrameQueue& frame_queue_)
-    : host1x(host1x_), memory_manager{host1x.GMMU()}, regs{regs_}, id{id_}, frame_queue{
-                                                                                frame_queue_} {}
+Decoder::Decoder(Host1x::Host1x& host1x_, s32 id_, const Host1x::NvdecCommon::NvdecRegisters& regs_)
+    : host1x(host1x_)
+    , regs{regs_}
+    , id{id_}
+{}
 
 Decoder::~Decoder() = default;
 
@@ -53,11 +54,11 @@ void Decoder::Decode() {
         }
 
         if (UsingDecodeOrder()) {
-            frame_queue.PushDecodeOrder(id, luma_top, std::move(frame));
-            frame_queue.PushDecodeOrder(id, luma_bottom, std::move(frame_copy));
+            host1x.frame_queue.PushDecodeOrder(id, luma_top, std::move(frame));
+            host1x.frame_queue.PushDecodeOrder(id, luma_bottom, std::move(frame_copy));
         } else {
-            frame_queue.PushPresentOrder(id, luma_top, std::move(frame));
-            frame_queue.PushPresentOrder(id, luma_bottom, std::move(frame_copy));
+            host1x.frame_queue.PushPresentOrder(id, luma_top, std::move(frame));
+            host1x.frame_queue.PushPresentOrder(id, luma_bottom, std::move(frame_copy));
         }
     } else {
         auto [luma_offset, chroma_offset] = GetProgressiveOffsets();
@@ -68,9 +69,9 @@ void Decoder::Decode() {
         }
 
         if (UsingDecodeOrder()) {
-            frame_queue.PushDecodeOrder(id, luma_offset, std::move(frame));
+            host1x.frame_queue.PushDecodeOrder(id, luma_offset, std::move(frame));
         } else {
-            frame_queue.PushPresentOrder(id, luma_offset, std::move(frame));
+            host1x.frame_queue.PushPresentOrder(id, luma_offset, std::move(frame));
         }
     }
 }

src/video_core/host1x/codecs/decoder.h

@@ -14,7 +14,7 @@
 #include <queue>
 
 #include "common/common_types.h"
-#include "video_core/host1x/ffmpeg/ffmpeg.h"
+#include "video_core/host1x/ffmpeg.h"
 #include "video_core/host1x/nvdec_common.h"
 
 namespace Tegra {
@@ -35,33 +35,23 @@ public:
         return decode_api.UsingDecodeOrder();
     }
 
-    /// Returns the value of current_codec
-    [[nodiscard]] Host1x::NvdecCommon::VideoCodec GetCurrentCodec() const {
-        return codec;
-    }
-
     /// Return name of the current codec
     [[nodiscard]] virtual std::string_view GetCurrentCodecName() const = 0;
 
 protected:
-    explicit Decoder(Host1x::Host1x& host1x, s32 id,
-                     const Host1x::NvdecCommon::NvdecRegisters& regs,
-                     Host1x::FrameQueue& frame_queue);
+    explicit Decoder(Host1x::Host1x& host1x, s32 id, const Host1x::NvdecCommon::NvdecRegisters& regs);
 
     virtual std::span<const u8> ComposeFrame() = 0;
     virtual std::tuple<u64, u64> GetProgressiveOffsets() = 0;
     virtual std::tuple<u64, u64, u64, u64> GetInterlacedOffsets() = 0;
     virtual bool IsInterlaced() = 0;
 
+    FFmpeg::DecodeApi decode_api;
     Host1x::Host1x& host1x;
-    Tegra::MemoryManager& memory_manager;
     const Host1x::NvdecCommon::NvdecRegisters& regs;
     s32 id;
-    Host1x::FrameQueue& frame_queue;
-    Host1x::NvdecCommon::VideoCodec codec;
-    FFmpeg::DecodeApi decode_api;
-    bool initialized{};
-    bool vp9_hidden_frame{};
+    bool initialized : 1 = false;
+    bool vp9_hidden_frame : 1 = false;
 };
 
 } // namespace Tegra

src/video_core/host1x/codecs/h264.cpp

@@ -1,4 +1,4 @@
-// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 
 // SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project
@@ -14,25 +14,11 @@
 #include "video_core/memory_manager.h"
 
 namespace Tegra::Decoders {
-namespace {
-// ZigZag LUTs from libavcodec.
-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,
-};
 
-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,
-};
-} // Anonymous namespace
-
-H264::H264(Host1x::Host1x& host1x_, const Host1x::NvdecCommon::NvdecRegisters& regs_, s32 id_,
-           Host1x::FrameQueue& frame_queue_)
-    : Decoder{host1x_, id_, regs_, frame_queue_} {
-    codec = Host1x::NvdecCommon::VideoCodec::H264;
-    initialized = decode_api.Initialize(codec);
+H264::H264(Host1x::Host1x& host1x_, const Host1x::NvdecCommon::NvdecRegisters& regs_, s32 id_)
+    : Decoder{host1x_, id_, regs_}
+{
+    initialized = decode_api.Initialize(Host1x::NvdecCommon::VideoCodec::H264);
 }
 
 H264::~H264() = default;
@@ -65,14 +51,11 @@ bool H264::IsInterlaced() {
 }
 
 std::span<const u8> H264::ComposeFrame() {
-    memory_manager.ReadBlock(regs.picture_info_offset.Address(), &current_context,
-                             sizeof(H264DecoderContext));
-
+    host1x.memory_manager.ReadBlock(regs.picture_info_offset.Address(), &current_context, sizeof(H264DecoderContext));
     const s64 frame_number = current_context.h264_parameter_set.frame_number.Value();
     if (!is_first_frame && frame_number != 0) {
         frame_scratch.resize_destructive(current_context.stream_len);
-        memory_manager.ReadBlock(regs.frame_bitstream_offset.Address(), frame_scratch.data(),
-                                 frame_scratch.size());
+        host1x.memory_manager.ReadBlock(regs.frame_bitstream_offset.Address(), frame_scratch.data(), frame_scratch.size());
         return frame_scratch;
     }
 
@@ -174,15 +157,13 @@ std::span<const u8> H264::ComposeFrame() {
 
     for (s32 index = 0; index < 6; index++) {
         writer.WriteBit(true);
-        std::span<const u8> matrix{current_context.weight_scale_4x4};
-        writer.WriteScalingList(scan_scratch, matrix, index * 16, 16);
+        writer.WriteScalingList(current_context.weight_scale_4x4, index * 16, 16);
     }
 
     if (current_context.h264_parameter_set.transform_8x8_mode_flag) {
         for (s32 index = 0; index < 2; index++) {
             writer.WriteBit(true);
-            std::span<const u8> matrix{current_context.weight_scale_8x8};
-            writer.WriteScalingList(scan_scratch, matrix, index * 64, 64);
+            writer.WriteScalingList(current_context.weight_scale_8x8, index * 64, 64);
         }
     }
 
@@ -196,11 +177,7 @@ std::span<const u8> H264::ComposeFrame() {
     const auto& encoded_header = writer.GetByteArray();
     frame_scratch.resize(encoded_header.size() + current_context.stream_len);
     std::memcpy(frame_scratch.data(), encoded_header.data(), encoded_header.size());
-
-    memory_manager.ReadBlock(regs.frame_bitstream_offset.Address(),
-                             frame_scratch.data() + encoded_header.size(),
-                             current_context.stream_len);
-
+    host1x.memory_manager.ReadBlock(regs.frame_bitstream_offset.Address(), frame_scratch.data() + encoded_header.size(), current_context.stream_len);
     return frame_scratch;
 }
 
@@ -229,23 +206,37 @@ void H264BitWriter::WriteBit(bool state) {
     WriteBits(state ? 1 : 0, 1);
 }
 
-void H264BitWriter::WriteScalingList(Common::ScratchBuffer<u8>& scan, std::span<const u8> list,
-                                     s32 start, s32 count) {
-    scan.resize_destructive(count);
+void H264BitWriter::WriteScalingList(std::span<const u8> list, s32 start, s32 count) {
     if (count == 16) {
-        std::memcpy(scan.data(), zig_zag_scan.data(), scan.size());
+        u8 last_scale = 8;
+        for (s32 index = 0; index < count; index++) {
+            // libavcodec has a zig zag LUT, but we dont need it, just use a magic
+            // constant which is a packing of 4 bits for each component of the table
+            const u8 value = list[start + ((0xfeb7adc963258410 >> (index * 4)) & 0xf)];
+            const s32 delta_scale = s32(value - last_scale);
+            WriteSe(delta_scale);
+            last_scale = value;
+        }
     } 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;
+        // ZigZag LUTs from libavcodec: this is the famous zigzag pattern found in the ffmpeg logo itself!
+        static constexpr std::array<u8, 64> scan{
+            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,
+        };
+        u8 last_scale = 8;
+        for (s32 index = 0; index < count; index++) {
+            const u8 value = list[start + scan[index]];
+            const s32 delta_scale = s32(value - last_scale);
+            WriteSe(delta_scale);
+            last_scale = value;
+        }
     }
 }
 
@@ -286,19 +277,15 @@ void H264BitWriter::WriteBits(s32 value, s32 bit_count) {
 
 void H264BitWriter::WriteExpGolombCodedInt(s32 value) {
     const s32 sign = value <= 0 ? 0 : 1;
-    if (value < 0) {
-        value = -value;
-    }
-    value = (value << 1) - sign;
-    WriteExpGolombCodedUInt(value);
+    if (!sign) value = -value;
+    WriteExpGolombCodedUInt((value << 1) - sign);
 }
 
 void H264BitWriter::WriteExpGolombCodedUInt(u32 value) {
     const s32 size = 32 - std::countl_zero(value + 1);
     WriteBits(1, size);
-
     value -= (1U << (size - 1)) - 1;
-    WriteBits(static_cast<s32>(value), size - 1);
+    WriteBits(s32(value), size - 1);
 }
 
 s32 H264BitWriter::GetFreeBufferBits() {

src/video_core/host1x/codecs/h264.h

@@ -1,3 +1,6 @@
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
@@ -6,11 +9,10 @@
 #include <span>
 #include <vector>
 
-#include "common/bit_field.h"
-#include "common/common_funcs.h"
 #include "common/common_types.h"
 #include "common/scratch_buffer.h"
 #include "video_core/host1x/codecs/decoder.h"
+#include "video_core/host1x/codec_types.h"
 #include "video_core/host1x/nvdec_common.h"
 
 namespace Tegra {
@@ -40,8 +42,7 @@ public:
 
     /// 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(Common::ScratchBuffer<u8>& scan, std::span<const u8> list, s32 start,
-                          s32 count);
+    void WriteScalingList(std::span<const u8> list, s32 start, s32 count);
 
     /// Return the bitstream as a vector.
     [[nodiscard]] std::vector<u8>& GetByteArray();
@@ -61,188 +62,9 @@ private:
     std::vector<u8> byte_array;
 };
 
-struct Offset {
-    constexpr u32 Address() const noexcept {
-        return offset << 8;
-    }
-
-private:
-    u32 offset;
-};
-static_assert(std::is_trivial_v<Offset>, "Offset must be trivial");
-static_assert(sizeof(Offset) == 0x4, "Offset has the wrong size!");
-
-struct H264ParameterSet {
-    s32 log2_max_pic_order_cnt_lsb_minus4; ///< 0x00
-    s32 delta_pic_order_always_zero_flag;  ///< 0x04
-    s32 frame_mbs_only_flag;               ///< 0x08
-    u32 pic_width_in_mbs;                  ///< 0x0C
-    u32 frame_height_in_mbs;               ///< 0x10
-    union {                                ///< 0x14
-        BitField<0, 2, u32> tile_format;
-        BitField<2, 3, u32> gob_height;
-        BitField<5, 27, u32> reserved_surface_format;
-    };
-    u32 entropy_coding_mode_flag;               ///< 0x18
-    s32 pic_order_present_flag;                 ///< 0x1C
-    s32 num_refidx_l0_default_active;           ///< 0x20
-    s32 num_refidx_l1_default_active;           ///< 0x24
-    s32 deblocking_filter_control_present_flag; ///< 0x28
-    s32 redundant_pic_cnt_present_flag;         ///< 0x2C
-    u32 transform_8x8_mode_flag;                ///< 0x30
-    u32 pitch_luma;                             ///< 0x34
-    u32 pitch_chroma;                           ///< 0x38
-    Offset luma_top_offset;                     ///< 0x3C
-    Offset luma_bot_offset;                     ///< 0x40
-    Offset luma_frame_offset;                   ///< 0x44
-    Offset chroma_top_offset;                   ///< 0x48
-    Offset chroma_bot_offset;                   ///< 0x4C
-    Offset chroma_frame_offset;                 ///< 0x50
-    u32 hist_buffer_size;                       ///< 0x54
-    union {                                     ///< 0x58
-        union {
-            BitField<0, 1, u64> mbaff_frame;
-            BitField<1, 1, u64> direct_8x8_inference;
-            BitField<2, 1, u64> weighted_pred;
-            BitField<3, 1, u64> constrained_intra_pred;
-            BitField<4, 1, u64> ref_pic;
-            BitField<5, 1, u64> field_pic;
-            BitField<6, 1, u64> bottom_field;
-            BitField<7, 1, u64> second_field;
-        } flags;
-        BitField<8, 4, u64> log2_max_frame_num_minus4;
-        BitField<12, 2, u64> chroma_format_idc;
-        BitField<14, 2, u64> pic_order_cnt_type;
-        BitField<16, 6, s64> pic_init_qp_minus26;
-        BitField<22, 5, s64> chroma_qp_index_offset;
-        BitField<27, 5, s64> second_chroma_qp_index_offset;
-        BitField<32, 2, u64> weighted_bipred_idc;
-        BitField<34, 7, u64> curr_pic_idx;
-        BitField<41, 5, u64> curr_col_idx;
-        BitField<46, 16, u64> frame_number;
-        BitField<62, 1, u64> frame_surfaces;
-        BitField<63, 1, u64> output_memory_layout;
-    };
-};
-static_assert(sizeof(H264ParameterSet) == 0x60, "H264ParameterSet is an invalid size");
-
-#define ASSERT_POSITION(field_name, position)                                                      \
-    static_assert(offsetof(H264ParameterSet, field_name) == position,                              \
-                  "Field " #field_name " has invalid position")
-
-ASSERT_POSITION(log2_max_pic_order_cnt_lsb_minus4, 0x00);
-ASSERT_POSITION(delta_pic_order_always_zero_flag, 0x04);
-ASSERT_POSITION(frame_mbs_only_flag, 0x08);
-ASSERT_POSITION(pic_width_in_mbs, 0x0C);
-ASSERT_POSITION(frame_height_in_mbs, 0x10);
-ASSERT_POSITION(tile_format, 0x14);
-ASSERT_POSITION(entropy_coding_mode_flag, 0x18);
-ASSERT_POSITION(pic_order_present_flag, 0x1C);
-ASSERT_POSITION(num_refidx_l0_default_active, 0x20);
-ASSERT_POSITION(num_refidx_l1_default_active, 0x24);
-ASSERT_POSITION(deblocking_filter_control_present_flag, 0x28);
-ASSERT_POSITION(redundant_pic_cnt_present_flag, 0x2C);
-ASSERT_POSITION(transform_8x8_mode_flag, 0x30);
-ASSERT_POSITION(pitch_luma, 0x34);
-ASSERT_POSITION(pitch_chroma, 0x38);
-ASSERT_POSITION(luma_top_offset, 0x3C);
-ASSERT_POSITION(luma_bot_offset, 0x40);
-ASSERT_POSITION(luma_frame_offset, 0x44);
-ASSERT_POSITION(chroma_top_offset, 0x48);
-ASSERT_POSITION(chroma_bot_offset, 0x4C);
-ASSERT_POSITION(chroma_frame_offset, 0x50);
-ASSERT_POSITION(hist_buffer_size, 0x54);
-ASSERT_POSITION(flags, 0x58);
-#undef ASSERT_POSITION
-
-struct DpbEntry {
-    union {
-        BitField<0, 7, u32> index;
-        BitField<7, 5, u32> col_idx;
-        BitField<12, 2, u32> state;
-        BitField<14, 1, u32> is_long_term;
-        BitField<15, 1, u32> non_existing;
-        BitField<16, 1, u32> is_field;
-        BitField<17, 4, u32> top_field_marking;
-        BitField<21, 4, u32> bottom_field_marking;
-        BitField<25, 1, u32> output_memory_layout;
-        BitField<26, 6, u32> reserved;
-    } flags;
-    std::array<u32, 2> field_order_cnt;
-    u32 frame_idx;
-};
-static_assert(sizeof(DpbEntry) == 0x10, "DpbEntry has the wrong size!");
-
-struct DisplayParam {
-    union {
-        BitField<0, 1, u32> enable_tf_output;
-        BitField<1, 1, u32> vc1_map_y_flag;
-        BitField<2, 3, u32> map_y_value;
-        BitField<5, 1, u32> vc1_map_uv_flag;
-        BitField<6, 3, u32> map_uv_value;
-        BitField<9, 8, u32> out_stride;
-        BitField<17, 3, u32> tiling_format;
-        BitField<20, 1, u32> output_structure; // 0=frame, 1=field
-        BitField<21, 11, u32> reserved0;
-    };
-    std::array<s32, 2> output_top;
-    std::array<s32, 2> output_bottom;
-    union {
-        BitField<0, 1, u32> enable_histogram;
-        BitField<1, 12, u32> histogram_start_x;
-        BitField<13, 12, u32> histogram_start_y;
-        BitField<25, 7, u32> reserved1;
-    };
-    union {
-        BitField<0, 12, u32> histogram_end_x;
-        BitField<12, 12, u32> histogram_end_y;
-        BitField<24, 8, u32> reserved2;
-    };
-};
-static_assert(sizeof(DisplayParam) == 0x1C, "DisplayParam has the wrong size!");
-
-struct H264DecoderContext {
-    INSERT_PADDING_WORDS_NOINIT(13);                        ///< 0x0000
-    std::array<u8, 16> eos;                                 ///< 0x0034
-    u8 explicit_eos_present_flag;                           ///< 0x0044
-    u8 hint_dump_en;                                        ///< 0x0045
-    INSERT_PADDING_BYTES_NOINIT(2);                         ///< 0x0046
-    u32 stream_len;                                         ///< 0x0048
-    u32 slice_count;                                        ///< 0x004C
-    u32 mbhist_buffer_size;                                 ///< 0x0050
-    u32 gptimer_timeout_value;                              ///< 0x0054
-    H264ParameterSet h264_parameter_set;                    ///< 0x0058
-    std::array<s32, 2> curr_field_order_cnt;                ///< 0x00B8
-    std::array<DpbEntry, 16> dpb;                           ///< 0x00C0
-    std::array<u8, 0x60> weight_scale_4x4;                  ///< 0x01C0
-    std::array<u8, 0x80> weight_scale_8x8;                  ///< 0x0220
-    std::array<u8, 2> num_inter_view_refs_lX;               ///< 0x02A0
-    std::array<u8, 14> reserved2;                           ///< 0x02A2
-    std::array<std::array<s8, 16>, 2> inter_view_refidx_lX; ///< 0x02B0
-    union {                                                 ///< 0x02D0
-        BitField<0, 1, u32> lossless_ipred8x8_filter_enable;
-        BitField<1, 1, u32> qpprime_y_zero_transform_bypass_flag;
-        BitField<2, 30, u32> reserved3;
-    };
-    DisplayParam display_param;   ///< 0x02D4
-    std::array<u32, 3> reserved4; ///< 0x02F0
-};
-static_assert(sizeof(H264DecoderContext) == 0x2FC, "H264DecoderContext is an invalid size");
-
-#define ASSERT_POSITION(field_name, position)                                                      \
-    static_assert(offsetof(H264DecoderContext, field_name) == position,                            \
-                  "Field " #field_name " has invalid position")
-
-ASSERT_POSITION(stream_len, 0x48);
-ASSERT_POSITION(h264_parameter_set, 0x58);
-ASSERT_POSITION(dpb, 0xC0);
-ASSERT_POSITION(weight_scale_4x4, 0x1C0);
-#undef ASSERT_POSITION
-
 class H264 final : public Decoder {
 public:
-    explicit H264(Host1x::Host1x& host1x, const Host1x::NvdecCommon::NvdecRegisters& regs, s32 id,
-                  Host1x::FrameQueue& frame_queue);
+    explicit H264(Host1x::Host1x& host1x, const Host1x::NvdecCommon::NvdecRegisters& regs, s32 id);
     ~H264() override;
 
     H264(const H264&) = delete;
@@ -263,10 +85,10 @@ public:
     }
 
 private:
-    bool is_first_frame{true};
-    Common::ScratchBuffer<u8> frame_scratch;
-    Common::ScratchBuffer<u8> scan_scratch;
     H264DecoderContext current_context{};
+    std::array<u8, 64> scan_scratch;
+    Common::ScratchBuffer<u8> frame_scratch;
+    bool is_first_frame{true};
 };
 
 } // namespace Decoders

src/video_core/host1x/codecs/vp8.cpp

@@ -1,3 +1,6 @@
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: Copyright 2021 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
@@ -8,11 +11,10 @@
 #include "video_core/memory_manager.h"
 
 namespace Tegra::Decoders {
-VP8::VP8(Host1x::Host1x& host1x_, const Host1x::NvdecCommon::NvdecRegisters& regs_, s32 id_,
-         Host1x::FrameQueue& frame_queue_)
-    : Decoder{host1x_, id_, regs_, frame_queue_} {
-    codec = Host1x::NvdecCommon::VideoCodec::VP8;
-    initialized = decode_api.Initialize(codec);
+VP8::VP8(Host1x::Host1x& host1x_, const Host1x::NvdecCommon::NvdecRegisters& regs_, s32 id_)
+    : Decoder{host1x_, id_, regs_}
+{
+    initialized = decode_api.Initialize(Host1x::NvdecCommon::VideoCodec::VP8);
 }
 
 VP8::~VP8() = default;
@@ -25,35 +27,30 @@ std::tuple<u64, u64> VP8::GetProgressiveOffsets() {
 
 std::tuple<u64, u64, u64, u64> VP8::GetInterlacedOffsets() {
     auto luma_top{regs.surface_luma_offsets[static_cast<u32>(Vp8SurfaceIndex::Current)].Address()};
-    auto luma_bottom{
-        regs.surface_luma_offsets[static_cast<u32>(Vp8SurfaceIndex::Current)].Address()};
-    auto chroma_top{
-        regs.surface_chroma_offsets[static_cast<u32>(Vp8SurfaceIndex::Current)].Address()};
-    auto chroma_bottom{
-        regs.surface_chroma_offsets[static_cast<u32>(Vp8SurfaceIndex::Current)].Address()};
+    auto luma_bottom = regs.surface_luma_offsets[u32(Vp8SurfaceIndex::Current)].Address();
+    auto chroma_top = regs.surface_chroma_offsets[u32(Vp8SurfaceIndex::Current)].Address();
+    auto chroma_bottom = regs.surface_chroma_offsets[u32(Vp8SurfaceIndex::Current)].Address();
     return {luma_top, luma_bottom, chroma_top, chroma_bottom};
 }
 
 std::span<const u8> VP8::ComposeFrame() {
-    memory_manager.ReadBlock(regs.picture_info_offset.Address(), &current_context,
-                             sizeof(VP8PictureInfo));
+    host1x.gmmu_manager.ReadBlock(regs.picture_info_offset.Address(), &current_context, sizeof(VP8PictureInfo));
 
     const bool is_key_frame = current_context.key_frame == 1u;
-    const auto bitstream_size = static_cast<size_t>(current_context.vld_buffer_size);
+    const auto bitstream_size = size_t(current_context.vld_buffer_size);
     const size_t header_size = is_key_frame ? 10u : 3u;
     frame_scratch.resize(header_size + bitstream_size);
 
     // Based on page 30 of the VP8 specification.
     // https://datatracker.ietf.org/doc/rfc6386/
     frame_scratch[0] = is_key_frame ? 0u : 1u; // 1-bit frame type (0: keyframe, 1: interframes).
-    frame_scratch[0] |=
-        static_cast<u8>((current_context.version & 7u) << 1u); // 3-bit version number
-    frame_scratch[0] |= static_cast<u8>(1u << 4u);             // 1-bit show_frame flag
+    frame_scratch[0] |= u8((current_context.version & 7u) << 1u); // 3-bit version number
+    frame_scratch[0] |= u8(1u << 4u);             // 1-bit show_frame flag
 
     // The next 19-bits are the first partition size
-    frame_scratch[0] |= static_cast<u8>((current_context.first_part_size & 7u) << 5u);
-    frame_scratch[1] = static_cast<u8>((current_context.first_part_size & 0x7f8u) >> 3u);
-    frame_scratch[2] = static_cast<u8>((current_context.first_part_size & 0x7f800u) >> 11u);
+    frame_scratch[0] |= u8((current_context.first_part_size & 7u) << 5u);
+    frame_scratch[1] = u8((current_context.first_part_size & 0x7f8u) >> 3u);
+    frame_scratch[2] = u8((current_context.first_part_size & 0x7f800u) >> 11u);
 
     if (is_key_frame) {
         frame_scratch[3] = 0x9du;
@@ -61,15 +58,15 @@ std::span<const u8> VP8::ComposeFrame() {
         frame_scratch[5] = 0x2au;
         // TODO(ameerj): Horizontal/Vertical Scale
         // 16 bits: (2 bits Horizontal Scale << 14) | Width (14 bits)
-        frame_scratch[6] = static_cast<u8>(current_context.frame_width & 0xff);
-        frame_scratch[7] = static_cast<u8>(((current_context.frame_width >> 8) & 0x3f));
+        frame_scratch[6] = u8(current_context.frame_width & 0xff);
+        frame_scratch[7] = u8(((current_context.frame_width >> 8) & 0x3f));
         // 16 bits:(2 bits Vertical Scale << 14) | Height (14 bits)
-        frame_scratch[8] = static_cast<u8>(current_context.frame_height & 0xff);
-        frame_scratch[9] = static_cast<u8>(((current_context.frame_height >> 8) & 0x3f));
+        frame_scratch[8] = u8(current_context.frame_height & 0xff);
+        frame_scratch[9] = u8(((current_context.frame_height >> 8) & 0x3f));
     }
-    const u64 bitstream_offset = regs.frame_bitstream_offset.Address();
-    memory_manager.ReadBlock(bitstream_offset, frame_scratch.data() + header_size, bitstream_size);
 
+    const u64 bitstream_offset = regs.frame_bitstream_offset.Address();
+    host1x.gmmu_manager.ReadBlock(bitstream_offset, frame_scratch.data() + header_size, bitstream_size);
     return frame_scratch;
 }
 

src/video_core/host1x/codecs/vp8.h

@@ -1,3 +1,6 @@
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: Copyright 2021 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
@@ -11,6 +14,7 @@
 #include "common/scratch_buffer.h"
 #include "video_core/host1x/codecs/decoder.h"
 #include "video_core/host1x/nvdec_common.h"
+#include "video_core/host1x/codec_types.h"
 
 namespace Tegra {
 
@@ -28,8 +32,7 @@ enum class Vp8SurfaceIndex : u32 {
 
 class VP8 final : public Decoder {
 public:
-    explicit VP8(Host1x::Host1x& host1x, const Host1x::NvdecCommon::NvdecRegisters& regs, s32 id,
-                 Host1x::FrameQueue& frame_queue);
+    explicit VP8(Host1x::Host1x& host1x, const Host1x::NvdecCommon::NvdecRegisters& regs, s32 id);
     ~VP8() override;
 
     VP8(const VP8&) = delete;
@@ -52,51 +55,8 @@ public:
     }
 
 private:
-    Common::ScratchBuffer<u8> frame_scratch;
-
-    struct VP8PictureInfo {
-        INSERT_PADDING_WORDS_NOINIT(14);
-        u16 frame_width;  // actual frame width
-        u16 frame_height; // actual frame height
-        u8 key_frame;
-        u8 version;
-        union {
-            u8 raw;
-            BitField<0, 2, u8> tile_format;
-            BitField<2, 3, u8> gob_height;
-            BitField<5, 3, u8> reserved_surface_format;
-        };
-        u8 error_conceal_on;  // 1: error conceal on; 0: off
-        u32 first_part_size;  // the size of first partition(frame header and mb header partition)
-        u32 hist_buffer_size; // in units of 256
-        u32 vld_buffer_size;  // in units of 1
-        // Current frame buffers
-        std::array<u32, 2> frame_stride; // [y_c]
-        u32 luma_top_offset;             // offset of luma top field in units of 256
-        u32 luma_bot_offset;             // offset of luma bottom field in units of 256
-        u32 luma_frame_offset;           // offset of luma frame in units of 256
-        u32 chroma_top_offset;           // offset of chroma top field in units of 256
-        u32 chroma_bot_offset;           // offset of chroma bottom field in units of 256
-        u32 chroma_frame_offset;         // offset of chroma frame in units of 256
-
-        INSERT_PADDING_BYTES_NOINIT(0x1c); // NvdecDisplayParams
-
-        // Decode picture buffer related
-        s8 current_output_memory_layout;
-        // output NV12/NV24 setting. index 0: golden; 1: altref; 2: last
-        std::array<s8, 3> output_memory_layout;
-
-        u8 segmentation_feature_data_update;
-        INSERT_PADDING_BYTES_NOINIT(3);
-
-        // ucode return result
-        u32 result_value;
-        std::array<u32, 8> partition_offset;
-        INSERT_PADDING_WORDS_NOINIT(3);
-    };
-    static_assert(sizeof(VP8PictureInfo) == 0xc0, "PictureInfo is an invalid size");
-
     VP8PictureInfo current_context{};
+    Common::ScratchBuffer<u8> frame_scratch;
 };
 
 } // namespace Decoders

src/video_core/host1x/codecs/vp9.cpp

@@ -1,10 +1,11 @@
-// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 
 // SPDX-FileCopyrightText: Copyright 2020 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
 #include <algorithm> // for std::copy
+#include <bit>
 #include <numeric>
 
 #include "common/alignment.h"
@@ -15,11 +16,11 @@
 
 namespace Tegra::Decoders {
 namespace {
-constexpr u32 diff_update_probability = 252;
-constexpr u32 frame_sync_code = 0x498342;
+static constexpr u32 diff_update_probability = 252;
+static constexpr u32 frame_sync_code = 0x498342;
 
 // Default compressed header probabilities once frame context resets
-constexpr Vp9EntropyProbs default_probs{
+static 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,
@@ -158,34 +159,6 @@ constexpr Vp9EntropyProbs default_probs{
     .high_precision{128, 128},
 };
 
-constexpr std::array<u8, 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,
-};
-
-constexpr std::array<u8, 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,
-};
-
 // 6.2.14 Tile size calculation
 
 [[nodiscard]] s32 CalcMinLog2TileCols(s32 frame_width) {
@@ -227,25 +200,17 @@ constexpr std::array<u8, 254> map_lut{
 [[nodiscard]] s32 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 static_cast<s32>(map_lut[index]);
+    u8 i = old_prob * 2 <= 0xff
+        ? u8((std::max)(0, RecenterNonNeg(new_prob, old_prob) - 1))
+        : u8((std::max)(0, RecenterNonNeg(0xff - 1 - new_prob, 0xff - 1 - old_prob) - 1));
+    return s32((i + 7) % 13 == 0 ? (i + 7) / 13 - 1 : i + 20 - (i + 7) / 13);
 }
 } // Anonymous namespace
 
-VP9::VP9(Host1x::Host1x& host1x_, const Host1x::NvdecCommon::NvdecRegisters& regs_, s32 id_,
-         Host1x::FrameQueue& frame_queue_)
-    : Decoder{host1x_, id_, regs_, frame_queue_} {
-    codec = Host1x::NvdecCommon::VideoCodec::VP9;
-    initialized = decode_api.Initialize(codec);
+VP9::VP9(Host1x::Host1x& host1x_, const Host1x::NvdecCommon::NvdecRegisters& regs_, s32 id_)
+    : Decoder{host1x_, id_, regs_}
+{
+    initialized = decode_api.Initialize(Host1x::NvdecCommon::VideoCodec::VP9);
 }
 
 VP9::~VP9() = default;
@@ -377,8 +342,7 @@ void VP9::WriteSegmentation(VpxBitStreamWriter& writer) {
 
     if (update_map) {
         EntropyProbs entropy_probs{};
-        memory_manager.ReadBlock(regs.vp9_prob_tab_buffer_offset.Address(), &entropy_probs,
-                                 sizeof(entropy_probs));
+        host1x.gmmu_manager.ReadBlock(regs.vp9_prob_tab_buffer_offset.Address(), &entropy_probs, sizeof(entropy_probs));
 
         auto WriteProb = [&](u8 prob) {
             bool coded = prob != 255;
@@ -442,8 +406,7 @@ void VP9::WriteSegmentation(VpxBitStreamWriter& writer) {
 }
 
 Vp9PictureInfo VP9::GetVp9PictureInfo() {
-    memory_manager.ReadBlock(regs.picture_info_offset.Address(), &current_picture_info,
-                             sizeof(PictureInfo));
+    host1x.gmmu_manager.ReadBlock(regs.picture_info_offset.Address(), &current_picture_info, sizeof(PictureInfo));
     Vp9PictureInfo vp9_info = current_picture_info.Convert();
 
     InsertEntropy(regs.vp9_prob_tab_buffer_offset.Address(), vp9_info.entropy);
@@ -459,7 +422,7 @@ Vp9PictureInfo VP9::GetVp9PictureInfo() {
 
 void VP9::InsertEntropy(u64 offset, Vp9EntropyProbs& dst) {
     EntropyProbs entropy;
-    memory_manager.ReadBlock(offset, &entropy, sizeof(EntropyProbs));
+    host1x.gmmu_manager.ReadBlock(offset, &entropy, sizeof(EntropyProbs));
     entropy.Convert(dst);
 }
 
@@ -469,9 +432,7 @@ Vp9FrameContainer VP9::GetCurrentFrame() {
         // gpu.SyncGuestHost(); epic, why?
         current_frame.info = GetVp9PictureInfo();
         current_frame.bit_stream.resize(current_frame.info.bitstream_size);
-        memory_manager.ReadBlock(regs.frame_bitstream_offset.Address(),
-                                 current_frame.bit_stream.data(),
-                                 current_frame.info.bitstream_size);
+        host1x.gmmu_manager.ReadBlock(regs.frame_bitstream_offset.Address(), current_frame.bit_stream.data(), current_frame.info.bitstream_size);
     }
     if (!next_frame.bit_stream.empty()) {
         Vp9FrameContainer temp{
@@ -893,13 +854,9 @@ std::span<const u8> VP9::ComposeFrame() {
     // Write headers and frame to buffer
     frame_scratch.resize(uncompressed_header.size() + compressed_header.size() + bitstream.size());
     std::copy(uncompressed_header.begin(), uncompressed_header.end(), frame_scratch.begin());
-    std::copy(compressed_header.begin(), compressed_header.end(),
-              frame_scratch.begin() + uncompressed_header.size());
-    std::copy(bitstream.begin(), bitstream.end(),
-              frame_scratch.begin() + uncompressed_header.size() + compressed_header.size());
-
+    std::copy(compressed_header.begin(), compressed_header.end(), frame_scratch.begin() + uncompressed_header.size());
+    std::copy(bitstream.begin(), bitstream.end(), frame_scratch.begin() + uncompressed_header.size() + compressed_header.size());
     vp9_hidden_frame = WasFrameHidden();
-
     return GetFrameBytes();
 }
 
@@ -929,7 +886,7 @@ void VpxRangeEncoder::Write(bool bit, s32 probability) {
         local_range = range - split;
     }
 
-    s32 shift = static_cast<s32>(norm_lut[local_range]);
+    s32 shift = s32(local_range == 0 ? 0 : (std::countl_zero<uint32_t>(local_range) - 24));
     local_range <<= shift;
     count += shift;
 

src/video_core/host1x/codecs/vp9.h

@@ -1,3 +1,6 @@
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: Copyright 2020 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
@@ -11,7 +14,7 @@
 #include "common/scratch_buffer.h"
 #include "common/stream.h"
 #include "video_core/host1x/codecs/decoder.h"
-#include "video_core/host1x/codecs/vp9_types.h"
+#include "video_core/host1x/codec_types.h"
 #include "video_core/host1x/nvdec_common.h"
 
 namespace Tegra {
@@ -113,8 +116,7 @@ private:
 
 class VP9 final : public Decoder {
 public:
-    explicit VP9(Host1x::Host1x& host1x, const Host1x::NvdecCommon::NvdecRegisters& regs, s32 id,
-                 Host1x::FrameQueue& frame_queue);
+    explicit VP9(Host1x::Host1x& host1x, const Host1x::NvdecCommon::NvdecRegisters& regs, s32 id);
     ~VP9() override;
 
     VP9(const VP9&) = delete;
@@ -193,11 +195,10 @@ private:
     [[nodiscard]] std::vector<u8> ComposeCompressedHeader();
     [[nodiscard]] VpxBitStreamWriter ComposeUncompressedHeader();
 
-    Common::ScratchBuffer<u8> frame_scratch;
-
     std::array<s8, 4> loop_filter_ref_deltas{};
     std::array<s8, 2> loop_filter_mode_deltas{};
 
+    Common::ScratchBuffer<u8> frame_scratch;
     Vp9FrameContainer next_frame{};
     std::array<Vp9EntropyProbs, 4> frame_ctxs{};
     bool swap_ref_indices{};

src/video_core/host1x/ffmpeg.cpp

@@ -0,0 +1,316 @@
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+// SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include "common/assert.h"
+#include "common/logging.h"
+#include "common/scope_exit.h"
+#include "common/settings.h"
+#include "core/memory.h"
+#include "video_core/host1x/ffmpeg.h"
+#include "video_core/memory_manager.h"
+
+extern "C" {
+#ifdef LIBVA_FOUND
+// for querying VAAPI driver information
+#include <libavutil/hwcontext_vaapi.h>
+#endif
+
+#include <libavutil/hwcontext.h>
+}
+
+namespace FFmpeg {
+
+namespace {
+
+constexpr AVPixelFormat PreferredGpuFormat = AV_PIX_FMT_NV12;
+constexpr AVPixelFormat PreferredCpuFormat = AV_PIX_FMT_YUV420P;
+constexpr std::array PreferredGpuDecoders = {
+#if defined (_WIN32)
+    AV_HWDEVICE_TYPE_CUDA,
+    AV_HWDEVICE_TYPE_D3D11VA,
+    AV_HWDEVICE_TYPE_DXVA2,
+    AV_HWDEVICE_TYPE_D3D12VA,
+#elif defined(__FreeBSD__)
+    AV_HWDEVICE_TYPE_VAAPI,
+    AV_HWDEVICE_TYPE_VDPAU,
+    AV_HWDEVICE_TYPE_DRM,
+#elif defined(__APPLE__)
+    AV_HWDEVICE_TYPE_VIDEOTOOLBOX,
+#elif defined(ANDROID)
+    AV_HWDEVICE_TYPE_MEDIACODEC,
+#elif defined(__unix__)
+    AV_HWDEVICE_TYPE_CUDA,
+    AV_HWDEVICE_TYPE_VAAPI,
+    AV_HWDEVICE_TYPE_VDPAU,
+#endif
+    AV_HWDEVICE_TYPE_VULKAN,
+};
+
+AVPixelFormat GetGpuFormat(AVCodecContext* codec_context, const AVPixelFormat* pix_fmts) {
+    const auto desc = av_pix_fmt_desc_get(codec_context->pix_fmt);
+    if (desc && !(desc->flags & AV_PIX_FMT_FLAG_HWACCEL)) {
+        for (int i = 0;; i++) {
+            const AVCodecHWConfig* config = avcodec_get_hw_config(codec_context->codec, i);
+            if (!config) {
+                break;
+            }
+
+            for (const auto type : PreferredGpuDecoders) {
+                if (config->methods & AV_CODEC_HW_CONFIG_METHOD_HW_DEVICE_CTX && config->device_type == type) {
+                    codec_context->pix_fmt = config->pix_fmt;
+                }
+            }
+        }
+    }
+
+    for (const AVPixelFormat* p = pix_fmts; *p != AV_PIX_FMT_NONE; ++p) {
+        if (*p == codec_context->pix_fmt) {
+            return codec_context->pix_fmt;
+        }
+    }
+
+    LOG_INFO(HW_GPU, "Could not find supported GPU pixel format, falling back to CPU decoder");
+    av_buffer_unref(&codec_context->hw_device_ctx);
+    codec_context->pix_fmt = PreferredCpuFormat;
+    return codec_context->pix_fmt;
+}
+
+std::string AVError(int errnum) {
+    char errbuf[AV_ERROR_MAX_STRING_SIZE] = {};
+    av_make_error_string(errbuf, sizeof(errbuf) - 1, errnum);
+    return errbuf;
+}
+
+}
+
+Packet::Packet(std::span<const u8> data) {
+    m_packet = av_packet_alloc();
+    m_packet->data = const_cast<u8*>(data.data());
+    m_packet->size = static_cast<s32>(data.size());
+}
+
+Packet::~Packet() {
+    av_packet_free(&m_packet);
+}
+
+Frame::Frame() {
+    m_frame = av_frame_alloc();
+}
+
+Frame::~Frame() {
+    av_frame_free(&m_frame);
+}
+
+Decoder::Decoder(Tegra::Host1x::NvdecCommon::VideoCodec codec) {
+    const AVCodecID av_codec = [&] {
+        switch (codec) {
+        case Tegra::Host1x::NvdecCommon::VideoCodec::H264:
+            return AV_CODEC_ID_H264;
+        case Tegra::Host1x::NvdecCommon::VideoCodec::VP8:
+            return AV_CODEC_ID_VP8;
+        case Tegra::Host1x::NvdecCommon::VideoCodec::VP9:
+            return AV_CODEC_ID_VP9;
+        default:
+            UNIMPLEMENTED_MSG("Unknown codec {}", codec);
+            return AV_CODEC_ID_NONE;
+        }
+    }();
+    m_codec = avcodec_find_decoder(av_codec);
+}
+
+bool Decoder::SupportsDecodingOnDevice(AVPixelFormat* out_pix_fmt, AVHWDeviceType type) const {
+    for (int i = 0;; i++) {
+        const AVCodecHWConfig* config = avcodec_get_hw_config(m_codec, i);
+        if (!config) {
+            LOG_DEBUG(HW_GPU, "{} decoder does not support device type {}", m_codec->name, av_hwdevice_get_type_name(type));
+            break;
+        }
+
+        if (config->methods & AV_CODEC_HW_CONFIG_METHOD_HW_DEVICE_CTX && config->device_type == type) {
+            LOG_INFO(HW_GPU, "Using {} GPU decoder", av_hwdevice_get_type_name(type));
+            *out_pix_fmt = config->pix_fmt;
+            return true;
+        }
+    }
+
+    return false;
+}
+
+std::vector<AVHWDeviceType> HardwareContext::GetSupportedDeviceTypes() {
+    std::vector<AVHWDeviceType> types;
+    AVHWDeviceType current_device_type = AV_HWDEVICE_TYPE_NONE;
+
+    while (true) {
+        current_device_type = av_hwdevice_iterate_types(current_device_type);
+        if (current_device_type == AV_HWDEVICE_TYPE_NONE) {
+            return types;
+        }
+
+        types.push_back(current_device_type);
+    }
+}
+
+HardwareContext::~HardwareContext() {
+    av_buffer_unref(&m_gpu_decoder);
+}
+
+bool HardwareContext::InitializeForDecoder(DecoderContext& decoder_context, const Decoder& decoder) {
+    const auto supported_types = GetSupportedDeviceTypes();
+    for (const auto type : PreferredGpuDecoders) {
+        AVPixelFormat hw_pix_fmt;
+
+        if (std::ranges::find(supported_types, type) == supported_types.end()) {
+            LOG_DEBUG(HW_GPU, "{} explicitly unsupported", av_hwdevice_get_type_name(type));
+            continue;
+        }
+
+        if (!this->InitializeWithType(type)) {
+            continue;
+        }
+
+        if (decoder.SupportsDecodingOnDevice(&hw_pix_fmt, type)) {
+            decoder_context.InitializeHardwareDecoder(*this, hw_pix_fmt);
+            return true;
+        }
+    }
+
+    return false;
+}
+
+bool HardwareContext::InitializeWithType(AVHWDeviceType type) {
+    av_buffer_unref(&m_gpu_decoder);
+
+    if (const int ret = av_hwdevice_ctx_create(&m_gpu_decoder, type, nullptr, nullptr, 0); ret < 0) {
+        LOG_DEBUG(HW_GPU, "av_hwdevice_ctx_create({}) failed: {}", av_hwdevice_get_type_name(type), AVError(ret));
+        return false;
+    }
+
+#ifdef LIBVA_FOUND
+    if (type == AV_HWDEVICE_TYPE_VAAPI) {
+        // We need to determine if this is an impersonated VAAPI driver.
+        auto* hwctx = reinterpret_cast<AVHWDeviceContext*>(m_gpu_decoder->data);
+        auto* vactx = static_cast<AVVAAPIDeviceContext*>(hwctx->hwctx);
+        const char* vendor_name = vaQueryVendorString(vactx->display);
+        if (strstr(vendor_name, "VDPAU backend")) {
+            // VDPAU impersonated VAAPI impls are super buggy, we need to skip them.
+            LOG_DEBUG(HW_GPU, "Skipping VDPAU impersonated VAAPI driver");
+            return false;
+        } else {
+            // According to some user testing, certain VAAPI drivers (Intel?) could be buggy.
+            // Log the driver name just in case.
+            LOG_DEBUG(HW_GPU, "Using VAAPI driver: {}", vendor_name);
+        }
+    }
+#endif
+
+    return true;
+}
+
+DecoderContext::DecoderContext(const Decoder& decoder) : m_decoder{decoder} {
+    m_codec_context = avcodec_alloc_context3(m_decoder.GetCodec());
+    av_opt_set(m_codec_context->priv_data, "tune", "zerolatency", 0);
+    m_codec_context->thread_count = 0;
+    m_codec_context->thread_type &= ~FF_THREAD_FRAME;
+}
+
+DecoderContext::~DecoderContext() {
+    av_buffer_unref(&m_codec_context->hw_device_ctx);
+    avcodec_free_context(&m_codec_context);
+}
+
+void DecoderContext::InitializeHardwareDecoder(const HardwareContext& context, AVPixelFormat hw_pix_fmt) {
+    m_codec_context->hw_device_ctx = av_buffer_ref(context.GetBufferRef());
+    m_codec_context->get_format = GetGpuFormat;
+    m_codec_context->pix_fmt = hw_pix_fmt;
+}
+
+bool DecoderContext::OpenContext(const Decoder& decoder) {
+    if (const int ret = avcodec_open2(m_codec_context, decoder.GetCodec(), nullptr); ret < 0) {
+        LOG_ERROR(HW_GPU, "avcodec_open2 error: {}", AVError(ret));
+        return false;
+    }
+
+    if (!m_codec_context->hw_device_ctx) {
+        LOG_INFO(HW_GPU, "Using FFmpeg CPU decoder");
+    }
+
+    return true;
+}
+
+bool DecoderContext::SendPacket(const Packet& packet) {
+    if (const int ret = avcodec_send_packet(m_codec_context, packet.GetPacket()); ret < 0 && ret != AVERROR_EOF && ret != AVERROR(EAGAIN)) {
+        LOG_ERROR(HW_GPU, "avcodec_send_packet error: {}", AVError(ret));
+        return false;
+    }
+
+    return true;
+}
+
+std::shared_ptr<Frame> DecoderContext::ReceiveFrame() {
+    auto ReceiveImpl = [&](AVFrame* frame) -> int {
+        const int ret = avcodec_receive_frame(m_codec_context, frame);
+        if (ret < 0 && ret != AVERROR_EOF && ret != AVERROR(EAGAIN)) {
+            LOG_ERROR(HW_GPU, "avcodec_receive_frame error: {}", AVError(ret));
+        }
+        return ret;
+    };
+
+    std::shared_ptr<Frame> intermediate_frame = std::make_shared<Frame>();
+    if (ReceiveImpl(intermediate_frame->GetFrame()) < 0) {
+        return {};
+    }
+
+    m_final_frame = std::make_shared<Frame>();
+    if (m_codec_context->hw_device_ctx) {
+        m_final_frame->SetFormat(PreferredGpuFormat);
+        if (const int ret = av_hwframe_transfer_data(m_final_frame->GetFrame(), intermediate_frame->GetFrame(), 0); ret < 0) {
+            LOG_ERROR(HW_GPU, "av_hwframe_transfer_data error: {}", AVError(ret));
+            return {};
+        }
+    } else {
+        m_final_frame = std::move(intermediate_frame);
+    }
+
+    return std::move(m_final_frame);
+}
+
+void DecodeApi::Reset() {
+    m_hardware_context.reset();
+    m_decoder_context.reset();
+    m_decoder.reset();
+}
+
+bool DecodeApi::Initialize(Tegra::Host1x::NvdecCommon::VideoCodec codec) {
+    this->Reset();
+    m_decoder.emplace(codec);
+    m_decoder_context.emplace(*m_decoder);
+
+    // Enable GPU decoding if requested.
+    if (Settings::values.nvdec_emulation.GetValue() == Settings::NvdecEmulation::Gpu) {
+        m_hardware_context.emplace();
+        m_hardware_context->InitializeForDecoder(*m_decoder_context, *m_decoder);
+    }
+
+    // Open the decoder context.
+    if (!m_decoder_context->OpenContext(*m_decoder)) {
+        this->Reset();
+        return false;
+    }
+
+    return true;
+}
+
+bool DecodeApi::SendPacket(std::span<const u8> packet_data) {
+    FFmpeg::Packet packet(packet_data);
+    return m_decoder_context->SendPacket(packet);
+}
+
+std::shared_ptr<Frame> DecodeApi::ReceiveFrame() {
+    // Receive raw frame from decoder.
+    return m_decoder_context->ReceiveFrame();
+}
+
+}

src/video_core/host1x/ffmpeg.h

@@ -0,0 +1,225 @@
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+// SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+#include <memory>
+#include <optional>
+#include <span>
+#include <vector>
+#include <queue>
+
+#include "common/common_funcs.h"
+#include "common/common_types.h"
+#include "video_core/host1x/nvdec_common.h"
+
+extern "C" {
+#if defined(__GNUC__) || defined(__clang__)
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wconversion"
+#endif
+
+#include <libavcodec/avcodec.h>
+#include <libavcodec/codec.h>
+#include <libavutil/opt.h>
+#include <libavutil/pixdesc.h>
+
+#if defined(__GNUC__) || defined(__clang__)
+#pragma GCC diagnostic pop
+#endif
+}
+
+namespace Tegra {
+class MemoryManager;
+}
+
+namespace FFmpeg {
+
+class Packet;
+class Frame;
+class Decoder;
+class HardwareContext;
+class DecoderContext;
+class DeinterlaceFilter;
+
+// Wraps an AVPacket, a container for compressed bitstream data.
+class Packet {
+public:
+    YUZU_NON_COPYABLE(Packet);
+    YUZU_NON_MOVEABLE(Packet);
+
+    explicit Packet(std::span<const u8> data);
+    ~Packet();
+
+    AVPacket* GetPacket() const {
+        return m_packet;
+    }
+
+private:
+    AVPacket* m_packet{};
+};
+
+// Wraps an AVFrame, a container for audio and video stream data.
+class Frame {
+public:
+    YUZU_NON_COPYABLE(Frame);
+    YUZU_NON_MOVEABLE(Frame);
+
+    explicit Frame();
+    ~Frame();
+
+    int GetWidth() const {
+        return m_frame->width;
+    }
+
+    int GetHeight() const {
+        return m_frame->height;
+    }
+
+    AVPixelFormat GetPixelFormat() const {
+        return static_cast<AVPixelFormat>(m_frame->format);
+    }
+
+    int GetStride(int plane) const {
+        return m_frame->linesize[plane];
+    }
+
+    int* GetStrides() const {
+        return m_frame->linesize;
+    }
+
+    u8* GetData(int plane) const {
+        return m_frame->data[plane];
+    }
+
+    const u8* GetPlane(int plane) const {
+        return m_frame->data[plane];
+    }
+
+    u8** GetPlanes() const {
+        return m_frame->data;
+    }
+
+    void SetFormat(int format) {
+        m_frame->format = format;
+    }
+
+    bool IsInterlaced() const {
+#if defined(FF_API_INTERLACED_FRAME) || LIBAVUTIL_VERSION_MAJOR >= 59
+        return m_frame->flags & AV_FRAME_FLAG_INTERLACED;
+#else
+        return m_frame->interlaced_frame;
+#endif
+    }
+
+    bool IsHardwareDecoded() const {
+        return m_frame->hw_frames_ctx != nullptr;
+    }
+
+    AVFrame* GetFrame() const {
+        return m_frame;
+    }
+
+private:
+    AVFrame* m_frame{};
+};
+
+// Wraps an AVCodec, a type containing information about a codec.
+class Decoder {
+public:
+    YUZU_NON_COPYABLE(Decoder);
+    YUZU_NON_MOVEABLE(Decoder);
+
+    explicit Decoder(Tegra::Host1x::NvdecCommon::VideoCodec codec);
+    ~Decoder() = default;
+
+    bool SupportsDecodingOnDevice(AVPixelFormat* out_pix_fmt, AVHWDeviceType type) const;
+
+    const AVCodec* GetCodec() const {
+        return m_codec;
+    }
+
+private:
+    const AVCodec* m_codec{};
+};
+
+// Wraps AVBufferRef for an accelerated decoder.
+class HardwareContext {
+public:
+    YUZU_NON_COPYABLE(HardwareContext);
+    YUZU_NON_MOVEABLE(HardwareContext);
+
+    static std::vector<AVHWDeviceType> GetSupportedDeviceTypes();
+
+    explicit HardwareContext() = default;
+    ~HardwareContext();
+
+    bool InitializeForDecoder(DecoderContext& decoder_context, const Decoder& decoder);
+
+    AVBufferRef* GetBufferRef() const {
+        return m_gpu_decoder;
+    }
+
+private:
+    bool InitializeWithType(AVHWDeviceType type);
+
+    AVBufferRef* m_gpu_decoder{};
+};
+
+// Wraps an AVCodecContext.
+class DecoderContext {
+public:
+    YUZU_NON_COPYABLE(DecoderContext);
+    YUZU_NON_MOVEABLE(DecoderContext);
+
+    explicit DecoderContext(const Decoder& decoder);
+    ~DecoderContext();
+
+    void InitializeHardwareDecoder(const HardwareContext& context, AVPixelFormat hw_pix_fmt);
+    bool OpenContext(const Decoder& decoder);
+    bool SendPacket(const Packet& packet);
+    std::shared_ptr<Frame> ReceiveFrame();
+
+    AVCodecContext* GetCodecContext() const {
+        return m_codec_context;
+    }
+
+    bool UsingDecodeOrder() const {
+        return m_decode_order;
+    }
+
+private:
+    const Decoder& m_decoder;
+    AVCodecContext* m_codec_context{};
+    std::shared_ptr<Frame> m_final_frame{};
+    bool m_decode_order{};
+};
+
+class DecodeApi {
+public:
+    YUZU_NON_COPYABLE(DecodeApi);
+    YUZU_NON_MOVEABLE(DecodeApi);
+
+    DecodeApi() = default;
+    ~DecodeApi() = default;
+
+    bool Initialize(Tegra::Host1x::NvdecCommon::VideoCodec codec);
+    void Reset();
+
+    bool UsingDecodeOrder() const {
+        return m_decoder_context->UsingDecodeOrder();
+    }
+
+    bool SendPacket(std::span<const u8> packet_data);
+    std::shared_ptr<Frame> ReceiveFrame();
+
+private:
+    std::optional<FFmpeg::Decoder> m_decoder;
+    std::optional<FFmpeg::DecoderContext> m_decoder_context;
+    std::optional<FFmpeg::HardwareContext> m_hardware_context;
+};
+
+} // namespace FFmpeg

src/video_core/host1x/host1x.cpp

@@ -1,4 +1,4 @@
-// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 
 // SPDX-FileCopyrightText: 2021 yuzu Emulator Project
@@ -12,9 +12,12 @@
 namespace Tegra::Host1x {
 
 Host1x::Host1x(Core::System& system_)
-    : system{system_}, syncpoint_manager{},
-      memory_manager(system.DeviceMemory()), gmmu_manager{system, memory_manager, 32, 0, 12},
-      allocator{std::make_unique<Common::FlatAllocator<u32, 0, 32>>(1 << 12)} {}
+    : system{system_}
+    , syncpoint_manager{}
+    , memory_manager(system.DeviceMemory())
+    , gmmu_manager{system, memory_manager, 32, 0, 12}
+    , allocator{1 << 12}
+{}
 
 Host1x::~Host1x() = default;
 
@@ -24,13 +27,13 @@ void Host1x::StartDevice(s32 fd, ChannelType type, u32 syncpt) {
 #ifdef YUZU_LEGACY
         std::call_once(nvdec_first_init, []() {std::this_thread::sleep_for(std::chrono::milliseconds{500});}); // HACK: For Astroneer
 #endif
-        devices[fd] = std::make_unique<Tegra::Host1x::Nvdec>(*this, fd, syncpt, frame_queue);
+        devices[fd] = std::make_unique<Tegra::Host1x::Nvdec>(*this, fd, syncpt);
         break;
     case ChannelType::VIC:
 #ifdef YUZU_LEGACY
         std::call_once(vic_first_init, []() {std::this_thread::sleep_for(std::chrono::milliseconds{500});}); // HACK: For Astroneer
 #endif
-        devices[fd] = std::make_unique<Tegra::Host1x::Vic>(*this, fd, syncpt, frame_queue);
+        devices[fd] = std::make_unique<Tegra::Host1x::Vic>(*this, fd, syncpt);
         break;
     default:
         LOG_ERROR(HW_GPU, "Unimplemented host1x device {}", static_cast<u32>(type));

src/video_core/host1x/host1x.h

@@ -184,20 +184,12 @@ public:
         return memory_manager;
     }
 
-    Tegra::MemoryManager& GMMU() {
-        return gmmu_manager;
-    }
-
-    const Tegra::MemoryManager& GMMU() const {
-        return gmmu_manager;
-    }
-
     Common::FlatAllocator<u32, 0, 32>& Allocator() {
-        return *allocator;
+        return allocator;
     }
 
     const Common::FlatAllocator<u32, 0, 32>& Allocator() const {
-        return *allocator;
+        return allocator;
     }
 
     void StartDevice(s32 fd, ChannelType type, u32 syncpt);
@@ -211,12 +203,11 @@ public:
         it->second->PushEntries(std::move(entries));
     }
 
-private:
     Core::System& system;
     SyncpointManager syncpoint_manager;
     Tegra::MaxwellDeviceMemoryManager memory_manager;
     Tegra::MemoryManager gmmu_manager;
-    std::unique_ptr<Common::FlatAllocator<u32, 0, 32>> allocator;
+    Common::FlatAllocator<u32, 0, 32> allocator;
     FrameQueue frame_queue;
     ankerl::unordered_dense::map<s32, std::unique_ptr<CDmaPusher>> devices;
 #ifdef YUZU_LEGACY