142 lines
4 KiB
C++
142 lines
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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/// Initializes the decoder.
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Init = 0,
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/// Decodes/encodes a data frame.
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EncodeDecode = 1,
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/// Shuts down the decoder.
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Shutdown = 2,
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/// Loads the saved decoder state. Used for DSP wake.
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LoadState = 3,
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/// Saves the decoder state. Used for DSP sleep.
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SaveState = 4,
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};
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enum class DecoderCodec : u16 {
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None = 0,
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DecodeAAC = 1,
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EncodeAAC = 2,
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};
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enum class ResultStatus : u32 {
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Success = 0,
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Error = 1,
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};
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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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// The DSP replies with the same contents as the response too.
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struct DecodeAACInitRequest {
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u32_le unknown1 = 0; // observed 1 here
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u32_le unknown2 = 0; // observed -1 here
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u32_le unknown3 = 0; // observed 1 here
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u32_le unknown4 = 0; // observed 0 here
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u32_le unknown5 = 0; // unused? observed 1 here
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u32_le unknown6 = 0; // unused? observed 0x20 here
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};
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struct DecodeAACRequest {
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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; // unused?
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u32_le unknown2 = 0; // unused?
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};
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struct DecodeAACResponse {
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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 unknown1 = 0;
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u32_le unknown2 = 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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// The DSP replies with the same contents as the response too.
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struct EncodeAACInitRequest {
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u32_le unknown1 = 0; // Num channels? 1 or 2. observed 1 here
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enum_le<DecoderSampleRate> sample_rate =
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DecoderSampleRate::Rate16000; // the rate the 3DS Sound app uses
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u32_le unknown3 = 0; // less than 3 according to the 3DS Sound app. observed 2 here
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u32_le unknown4 =
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0; // 0:raw 1:ADTS? less than 2 according to the 3DS Sound app. observed 0 here
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u32_le unknown5 = 0; // unused?
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u32_le unknown6 = 0; // unused?
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};
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struct EncodeAACRequest {
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u32_le src_addr_ch0 = 0;
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u32_le src_addr_ch1 = 0;
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u32_le dst_addr = 0;
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u32_le unknown1 = 0; // the 3DS Sound app explicitly moves 0x003B'4A08, possibly an address
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u32_le unknown2 = 0; // unused?
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u32_le unknown3 = 0; // unused?
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};
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struct EncodeAACResponse {
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u32_le unknown1 = 0;
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u32_le unknown2 = 0;
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u32_le unknown3 = 0;
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u32_le unknown4 = 0;
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u32_le unknown5 = 0; // unused?
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u32_le unknown6 = 0; // unused?
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};
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struct BinaryMessage {
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struct {
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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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// This is a guess, when tested with Init EncodeAAC, the DSP replies 0x0 for apparently
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// valid values and 0x1 (regardless of what was passed in the request) for invalid values in
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// other fields
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enum_le<ResultStatus> result = ResultStatus::Error;
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} header;
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union {
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std::array<u8, 24> data{};
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DecodeAACInitRequest decode_aac_init;
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DecodeAACRequest decode_aac_request;
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DecodeAACResponse decode_aac_response;
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EncodeAACInitRequest encode_aac_init;
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EncodeAACRequest encode_aac_request;
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EncodeAACResponse encode_aac_response;
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};
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};
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static_assert(sizeof(BinaryMessage) == 32, "Unexpected struct size for BinaryMessage");
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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() = default;
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virtual BinaryMessage ProcessRequest(const BinaryMessage& request) = 0;
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};
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} // namespace AudioCore::HLE
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