dolphin/Source/Core/AudioCommon/Src/Mixer.h

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// Copyright (C) 2003 Dolphin Project.
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, version 2.0.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License 2.0 for more details.
// A copy of the GPL 2.0 should have been included with the program.
// If not, see http://www.gnu.org/licenses/
// Official SVN repository and contact information can be found at
// http://code.google.com/p/dolphin-emu/
#ifndef _MIXER_H_
#define _MIXER_H_
// 16 bit Stereo
#define MAX_SAMPLES (1024 * 8)
#define INDEX_MASK (MAX_SAMPLES * 2 - 1)
#define RESERVED_SAMPLES (256)
class CMixer {
public:
CMixer(unsigned int AISampleRate = 48000, unsigned int DACSampleRate = 48000)
: m_aiSampleRate(AISampleRate)
, m_dacSampleRate(DACSampleRate)
, m_bits(16)
, m_channels(2)
, m_HLEready(false)
, m_numSamples(0)
, m_indexW(0)
, m_indexR(0)
{
// AyuanX: The internal (Core & DSP) sample rate is fixed at 32KHz
// So when AI/DAC sample rate differs than 32KHz, we have to do re-sampling
// I prefer speed so let's do down-sampling instead of up-sampling
// If you like better sound than speed, feel free to implement the up-sampling code
m_sampleRate = 32000;
INFO_LOG(AUDIO_INTERFACE, "Mixer is initialized (AISampleRate:%i, DACSampleRate:%i)", AISampleRate, DACSampleRate);
}
// Called from audio threads
virtual unsigned int Mix(short* samples, unsigned int numSamples);
virtual void Premix(short *samples, unsigned int numSamples) {}
unsigned int GetNumSamples();
// Called from main thread
virtual void PushSamples(short* samples, unsigned int num_samples);
unsigned int GetSampleRate() {return m_sampleRate;}
void SetThrottle(bool use) { m_throttle = use;}
void SetDTKMusic(bool use) { m_EnableDTKMusic = use;}
// TODO: do we need this
bool IsHLEReady() { return m_HLEready;}
void SetHLEReady(bool ready) { m_HLEready = ready;}
// ---------------------
protected:
unsigned int m_sampleRate;
unsigned int m_aiSampleRate;
unsigned int m_dacSampleRate;
int m_bits;
int m_channels;
bool m_HLEready;
bool m_EnableDTKMusic;
bool m_throttle;
short m_buffer[MAX_SAMPLES * 2];
volatile u32 m_numSamples;
u32 m_indexW;
u32 m_indexR;
private:
};
#endif // _MIXER_H_