dolphin/Source/Core/AudioCommon/Mixer.h

126 lines
4.6 KiB
C++

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