125 lines
4 KiB
C++
125 lines
4 KiB
C++
// Copyright 2017 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 <vector>
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#include <boost/serialization/access.hpp>
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#include "audio_core/audio_types.h"
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#include "audio_core/time_stretch.h"
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#include "common/common_types.h"
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#include "common/ring_buffer.h"
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#include "core/memory.h"
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namespace Service::DSP {
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class DSP_DSP;
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} // namespace Service::DSP
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namespace AudioCore {
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class Sink;
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enum class SinkType : u32;
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class DspInterface {
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public:
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DspInterface();
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virtual ~DspInterface();
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DspInterface(const DspInterface&) = delete;
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DspInterface(DspInterface&&) = delete;
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DspInterface& operator=(const DspInterface&) = delete;
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DspInterface& operator=(DspInterface&&) = delete;
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/**
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* Reads data from one of three DSP registers
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* @note this function blocks until the data is available
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* @param register_number the index of the register to read
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* @returns the value of the register
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*/
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virtual u16 RecvData(u32 register_number) = 0;
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/**
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* Checks whether data is ready in one of three DSP registers
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* @param register_number the index of the register to check
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* @returns true if data is ready
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*/
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virtual bool RecvDataIsReady(u32 register_number) const = 0;
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/**
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* Sets the DSP semaphore register
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* @param semaphore_value the value set to the semaphore register
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*/
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virtual void SetSemaphore(u16 semaphore_value) = 0;
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/**
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* Reads `length` bytes from the DSP pipe identified with `pipe_number`.
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* @note Can read up to the maximum value of a u16 in bytes (65,535).
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* @note IF an error is encoutered with either an invalid `pipe_number` or `length` value, an
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* empty vector will be returned.
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* @note IF `length` is set to 0, an empty vector will be returned.
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* @note IF `length` is greater than the amount of data available, this function will only read
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* the available amount.
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* @param pipe_number a `DspPipe`
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* @param length the number of bytes to read. The max is 65,535 (max of u16).
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* @returns a vector of bytes from the specified pipe. On error, will be empty.
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*/
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virtual std::vector<u8> PipeRead(DspPipe pipe_number, u32 length) = 0;
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/**
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* How much data is left in pipe
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* @param pipe_number The Pipe ID
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* @return The amount of data remaning in the pipe. This is the maximum length PipeRead will
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* return.
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*/
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virtual std::size_t GetPipeReadableSize(DspPipe pipe_number) const = 0;
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/**
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* Write to a DSP pipe.
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* @param pipe_number The Pipe ID
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* @param buffer The data to write to the pipe.
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*/
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virtual void PipeWrite(DspPipe pipe_number, const std::vector<u8>& buffer) = 0;
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/// Returns a reference to the array backing DSP memory
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virtual std::array<u8, Memory::DSP_RAM_SIZE>& GetDspMemory() = 0;
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/// Sets the dsp class that we trigger interrupts for
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virtual void SetServiceToInterrupt(std::weak_ptr<Service::DSP::DSP_DSP> dsp) = 0;
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/// Loads the DSP program
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virtual void LoadComponent(const std::vector<u8>& buffer) = 0;
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/// Unloads the DSP program
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virtual void UnloadComponent() = 0;
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/// Select the sink to use based on sink type.
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void SetSink(SinkType sink_type, std::string_view audio_device);
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/// Get the current sink
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Sink& GetSink();
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/// Enable/Disable audio stretching.
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void EnableStretching(bool enable);
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protected:
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void OutputFrame(StereoFrame16 frame);
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void OutputSample(std::array<s16, 2> sample);
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private:
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void FlushResidualStretcherAudio();
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void OutputCallback(s16* buffer, std::size_t num_frames);
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std::atomic<bool> perform_time_stretching = false;
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std::atomic<bool> flushing_time_stretcher = false;
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Common::RingBuffer<s16, 0x2000, 2> fifo;
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std::array<s16, 2> last_frame{};
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TimeStretcher time_stretcher;
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std::unique_ptr<Sink> sink;
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template <class Archive>
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void serialize(Archive& ar, const unsigned int) {}
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friend class boost::serialization::access;
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};
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} // namespace AudioCore
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