131 lines
3.2 KiB
C++
131 lines
3.2 KiB
C++
// Copyright 2013 Dolphin Emulator Project
|
|
// Licensed under GPLv2
|
|
// Refer to the license.txt file included.
|
|
|
|
#pragma once
|
|
|
|
#include <string>
|
|
|
|
#include "AudioCommon/WaveFile.h"
|
|
#include "Common/StdMutex.h"
|
|
|
|
// 16 bit Stereo
|
|
#define MAX_SAMPLES (1024 * 2) // 64ms
|
|
#define INDEX_MASK (MAX_SAMPLES * 2 - 1)
|
|
|
|
#define LOW_WATERMARK 1280 // 40 ms
|
|
#define MAX_FREQ_SHIFT 200 // per 32000 Hz
|
|
#define CONTROL_FACTOR 0.2f // in freq_shift per fifo size offset
|
|
#define CONTROL_AVG 32
|
|
|
|
class CMixer {
|
|
|
|
public:
|
|
CMixer(unsigned int BackendSampleRate)
|
|
: m_dma_mixer(this, 32000)
|
|
, m_streaming_mixer(this, 48000)
|
|
, m_sampleRate(BackendSampleRate)
|
|
, m_logAudio(0)
|
|
, m_throttle(false)
|
|
, m_speed(0)
|
|
{
|
|
INFO_LOG(AUDIO_INTERFACE, "Mixer is initialized");
|
|
}
|
|
|
|
virtual ~CMixer() {}
|
|
|
|
// Called from audio threads
|
|
virtual unsigned int Mix(short* samples, unsigned int numSamples, bool consider_framelimit = true);
|
|
|
|
// Called from main thread
|
|
virtual void PushSamples(const short* samples, unsigned int num_samples);
|
|
virtual void PushStreamingSamples(const short* samples, unsigned int num_samples);
|
|
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 SetThrottle(bool use) { m_throttle = use;}
|
|
|
|
|
|
virtual void StartLogAudio(const std::string& filename)
|
|
{
|
|
if (! m_logAudio)
|
|
{
|
|
m_logAudio = true;
|
|
g_wave_writer.Start(filename, GetSampleRate());
|
|
g_wave_writer.SetSkipSilence(false);
|
|
NOTICE_LOG(DSPHLE, "Starting Audio logging");
|
|
}
|
|
else
|
|
{
|
|
WARN_LOG(DSPHLE, "Audio logging has already been started");
|
|
}
|
|
}
|
|
|
|
virtual void StopLogAudio()
|
|
{
|
|
if (m_logAudio)
|
|
{
|
|
m_logAudio = false;
|
|
g_wave_writer.Stop();
|
|
NOTICE_LOG(DSPHLE, "Stopping Audio logging");
|
|
}
|
|
else
|
|
{
|
|
WARN_LOG(DSPHLE, "Audio logging has already been stopped");
|
|
}
|
|
}
|
|
|
|
std::mutex& MixerCritical() { return m_csMixing; }
|
|
|
|
float GetCurrentSpeed() const { return m_speed; }
|
|
void UpdateSpeed(volatile float val) { m_speed = val; }
|
|
|
|
protected:
|
|
class MixerFifo {
|
|
public:
|
|
MixerFifo(CMixer *mixer, unsigned sample_rate)
|
|
: m_mixer(mixer)
|
|
, m_input_sample_rate(sample_rate)
|
|
, m_indexW(0)
|
|
, m_indexR(0)
|
|
, m_LVolume(256)
|
|
, m_RVolume(256)
|
|
, m_numLeftI(0.0f)
|
|
, m_frac(0)
|
|
{
|
|
memset(m_buffer, 0, sizeof(m_buffer));
|
|
}
|
|
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;
|
|
short m_buffer[MAX_SAMPLES * 2];
|
|
volatile u32 m_indexW;
|
|
volatile u32 m_indexR;
|
|
// Volume ranges from 0-256
|
|
volatile s32 m_LVolume;
|
|
volatile s32 m_RVolume;
|
|
float m_numLeftI;
|
|
u32 m_frac;
|
|
};
|
|
MixerFifo m_dma_mixer;
|
|
MixerFifo m_streaming_mixer;
|
|
unsigned int m_sampleRate;
|
|
|
|
WaveFileWriter g_wave_writer;
|
|
|
|
bool m_logAudio;
|
|
|
|
bool m_throttle;
|
|
|
|
std::mutex m_csMixing;
|
|
|
|
volatile float m_speed; // Current rate of the emulation (1.0 = 100% speed)
|
|
};
|