90 lines
2.4 KiB
C++
90 lines
2.4 KiB
C++
// Copyright 2018 Citra Emulator Project
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#pragma once
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#include <memory>
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#include <optional>
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#include <vector>
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#include "common/common_types.h"
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#include "common/swap.h"
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#include "core/core.h"
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namespace AudioCore::HLE {
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enum class DecoderCommand : u16 {
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Init,
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Decode,
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Unknown,
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};
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enum class DecoderCodec : u16 {
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None,
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AAC,
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};
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// TODO(xperia64): I'm guessing that this is a u32 (from when it was an unknown)
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// but it could be a u16 or u8 I suppose
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enum class DecoderSampleRate : u32 {
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Rate48000 = 0,
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Rate44100 = 1,
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Rate32000 = 2,
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Rate24000 = 3,
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Rate22050 = 4,
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Rate16000 = 5,
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Rate12000 = 6,
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Rate11025 = 7,
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Rate8000 = 8
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};
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struct BinaryRequest {
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enum_le<DecoderCodec> codec =
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DecoderCodec::None; // this is a guess. until now only 0x1 was observed here
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enum_le<DecoderCommand> cmd = DecoderCommand::Init;
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u32_le fixed = 0;
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u32_le src_addr = 0;
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u32_le size = 0;
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u32_le dst_addr_ch0 = 0;
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u32_le dst_addr_ch1 = 0;
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u32_le unknown1 = 0;
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u32_le unknown2 = 0;
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};
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static_assert(sizeof(BinaryRequest) == 32, "Unexpected struct size for BinaryRequest");
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struct BinaryResponse {
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enum_le<DecoderCodec> codec =
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DecoderCodec::None; // this could be something else. until now only 0x1 was observed here
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enum_le<DecoderCommand> cmd = DecoderCommand::Init;
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u32_le unknown1 = 0;
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enum_le<DecoderSampleRate> sample_rate;
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u32_le num_channels = 0; // this is a guess, so far I only observed 2 here
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u32_le size = 0;
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u32_le unknown3 = 0;
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u32_le unknown4 = 0;
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u32_le num_samples = 0; // this is a guess, so far I only observed 1024 here
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};
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static_assert(sizeof(BinaryResponse) == 32, "Unexpected struct size for BinaryResponse");
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enum_le<DecoderSampleRate> GetSampleRateEnum(u32 sample_rate);
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class DecoderBase {
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public:
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virtual ~DecoderBase();
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virtual std::optional<BinaryResponse> ProcessRequest(const BinaryRequest& request) = 0;
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/// Return true if this Decoder can be loaded. Return false if the system cannot create the
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/// decoder
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virtual bool IsValid() const = 0;
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};
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class NullDecoder final : public DecoderBase {
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public:
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NullDecoder();
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~NullDecoder() override;
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std::optional<BinaryResponse> ProcessRequest(const BinaryRequest& request) override;
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bool IsValid() const override {
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return true;
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}
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};
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} // namespace AudioCore::HLE
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