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// Copyright 2009 Dolphin Emulator Project
// Licensed under GPLv2+
// Refer to the license.txt file included.
#pragma once
#include <array>
#include <atomic>
#include "AudioCommon/WaveFile.h"
#include "Common/CommonTypes.h"
class CMixer final
{
public:
explicit CMixer(unsigned int BackendSampleRate);
~CMixer();
// Called from audio threads
unsigned int Mix(short* samples, unsigned int numSamples, bool consider_framelimit = true);
// 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);
unsigned int GetSampleRate() const { return m_sampleRate; }
void SetDMAInputSampleRate(unsigned int rate);
void SetStreamInputSampleRate(unsigned int rate);
void SetStreamingVolume(unsigned int lvolume, unsigned int rvolume);
void SetWiimoteSpeakerVolume(unsigned int lvolume, unsigned int rvolume);
void StartLogDTKAudio(const std::string& filename);
void StopLogDTKAudio();
void StartLogDSPAudio(const std::string& filename);
void StopLogDSPAudio();
float GetCurrentSpeed() const { return m_speed.load(); }
void UpdateSpeed(float val) { m_speed.store(val); }
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
class MixerFifo final
{
public:
MixerFifo(CMixer* mixer, unsigned sample_rate)
: m_mixer(mixer)
, m_input_sample_rate(sample_rate)
{
}
void PushSamples(const short* samples, unsigned int num_samples);
unsigned int Mix(short* samples, unsigned int numSamples, bool consider_framelimit = true);
void SetInputSampleRate(unsigned int rate);
void SetVolume(unsigned int lvolume, unsigned int rvolume);
private:
CMixer* m_mixer;
unsigned m_input_sample_rate;
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;
};
MixerFifo m_dma_mixer{this, 32000};
MixerFifo m_streaming_mixer{this, 48000};
MixerFifo m_wiimote_speaker_mixer{this, 3000};
unsigned int m_sampleRate;
WaveFileWriter m_wave_writer_dtk;
WaveFileWriter m_wave_writer_dsp;
bool m_log_dtk_audio = false;
bool m_log_dsp_audio = false;
// Current rate of emulation (1.0 = 100% speed)
std::atomic<float> m_speed{0.0f};
};
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