Merge yuzu-emu#12461

src/video_core/host1x/codecs/decoder.h

@@ -0,0 +1,64 @@
+// SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+#include <memory>
+#include <mutex>
+#include <optional>
+#include <string_view>
+#include <unordered_map>
+#include <queue>
+
+#include "common/common_types.h"
+#include "video_core/host1x/ffmpeg/ffmpeg.h"
+#include "video_core/host1x/nvdec_common.h"
+
+namespace Tegra {
+
+namespace Host1x {
+class Host1x;
+class FrameQueue;
+} // namespace Host1x
+
+class Decoder {
+public:
+    virtual ~Decoder();
+
+    /// Call decoders to construct headers, decode AVFrame with ffmpeg
+    void Decode();
+
+    bool UsingDecodeOrder() const {
+        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);
+
+    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;
+
+    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{};
+};
+
+} // namespace Tegra