126 lines
4.6 KiB
C++
126 lines
4.6 KiB
C++
// Copyright 2009 Dolphin Emulator Project
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// SPDX-License-Identifier: GPL-2.0-or-later
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#pragma once
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#include <array>
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#include <atomic>
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#include "AudioCommon/AudioStretcher.h"
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#include "AudioCommon/SurroundDecoder.h"
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#include "AudioCommon/WaveFile.h"
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#include "Common/CommonTypes.h"
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#include "Common/Config/Config.h"
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class PointerWrap;
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class Mixer final
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{
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public:
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explicit Mixer(unsigned int BackendSampleRate);
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~Mixer();
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void DoState(PointerWrap& p);
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// Called from audio threads
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unsigned int Mix(short* samples, unsigned int numSamples);
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unsigned int MixSurround(float* samples, unsigned int num_samples);
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// Called from main thread
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void PushSamples(const short* samples, unsigned int num_samples);
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void PushStreamingSamples(const short* samples, unsigned int num_samples);
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void PushWiimoteSpeakerSamples(const short* samples, unsigned int num_samples,
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unsigned int sample_rate_divisor);
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void PushSkylanderPortalSamples(const u8* samples, unsigned int num_samples);
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void PushGBASamples(int device_number, const short* samples, unsigned int num_samples);
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unsigned int GetSampleRate() const { return m_sampleRate; }
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void SetDMAInputSampleRateDivisor(unsigned int rate_divisor);
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void SetStreamInputSampleRateDivisor(unsigned int rate_divisor);
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void SetGBAInputSampleRateDivisors(int device_number, unsigned int rate_divisor);
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void SetStreamingVolume(unsigned int lvolume, unsigned int rvolume);
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void SetWiimoteSpeakerVolume(unsigned int lvolume, unsigned int rvolume);
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void SetGBAVolume(int device_number, unsigned int lvolume, unsigned int rvolume);
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void StartLogDTKAudio(const std::string& filename);
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void StopLogDTKAudio();
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void StartLogDSPAudio(const std::string& filename);
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void StopLogDSPAudio();
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// 54000000 doesn't work here as it doesn't evenly divide with 32000, but 108000000 does
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static constexpr u64 FIXED_SAMPLE_RATE_DIVIDEND = 54000000 * 2;
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private:
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static constexpr u32 MAX_SAMPLES = 1024 * 4; // 128 ms
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static constexpr u32 INDEX_MASK = MAX_SAMPLES * 2 - 1;
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static constexpr int MAX_FREQ_SHIFT = 200; // Per 32000 Hz
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static constexpr float CONTROL_FACTOR = 0.2f;
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static constexpr u32 CONTROL_AVG = 32; // In freq_shift per FIFO size offset
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const unsigned int SURROUND_CHANNELS = 6;
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class MixerFifo final
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{
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public:
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MixerFifo(Mixer* mixer, unsigned sample_rate_divisor, bool little_endian)
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: m_mixer(mixer), m_input_sample_rate_divisor(sample_rate_divisor),
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m_little_endian(little_endian)
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{
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}
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void DoState(PointerWrap& p);
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void PushSamples(const short* samples, unsigned int num_samples);
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unsigned int Mix(short* samples, unsigned int numSamples, bool consider_framelimit,
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float emulationspeed, int timing_variance);
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void SetInputSampleRateDivisor(unsigned int rate_divisor);
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unsigned int GetInputSampleRateDivisor() const;
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void SetVolume(unsigned int lvolume, unsigned int rvolume);
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std::pair<s32, s32> GetVolume() const;
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unsigned int AvailableSamples() const;
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private:
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Mixer* m_mixer;
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unsigned m_input_sample_rate_divisor;
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bool m_little_endian;
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std::array<short, MAX_SAMPLES * 2> m_buffer{};
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std::atomic<u32> m_indexW{0};
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std::atomic<u32> m_indexR{0};
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// Volume ranges from 0-256
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std::atomic<s32> m_LVolume{256};
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std::atomic<s32> m_RVolume{256};
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float m_numLeftI = 0.0f;
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u32 m_frac = 0;
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};
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void RefreshConfig();
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MixerFifo m_dma_mixer{this, FIXED_SAMPLE_RATE_DIVIDEND / 32000, false};
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MixerFifo m_streaming_mixer{this, FIXED_SAMPLE_RATE_DIVIDEND / 48000, false};
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MixerFifo m_wiimote_speaker_mixer{this, FIXED_SAMPLE_RATE_DIVIDEND / 3000, true};
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MixerFifo m_skylander_portal_mixer{this, FIXED_SAMPLE_RATE_DIVIDEND / 8000, true};
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std::array<MixerFifo, 4> m_gba_mixers{MixerFifo{this, FIXED_SAMPLE_RATE_DIVIDEND / 48000, true},
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MixerFifo{this, FIXED_SAMPLE_RATE_DIVIDEND / 48000, true},
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MixerFifo{this, FIXED_SAMPLE_RATE_DIVIDEND / 48000, true},
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MixerFifo{this, FIXED_SAMPLE_RATE_DIVIDEND / 48000, true}};
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unsigned int m_sampleRate;
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bool m_is_stretching = false;
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AudioCommon::AudioStretcher m_stretcher;
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AudioCommon::SurroundDecoder m_surround_decoder;
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std::array<short, MAX_SAMPLES * 2> m_scratch_buffer{};
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WaveFileWriter m_wave_writer_dtk;
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WaveFileWriter m_wave_writer_dsp;
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bool m_log_dtk_audio = false;
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bool m_log_dsp_audio = false;
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float m_config_emulation_speed;
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int m_config_timing_variance;
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bool m_config_audio_stretch;
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Config::ConfigChangedCallbackID m_config_changed_callback_id;
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};
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