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#pragma once
#include <portaudio.h>
#include <QString>
#include "soundio/sounddevice.h"
#include "util/duration.h"
#include "util/performancetimer.h"
class SoundManager;
class ControlProxy;
class SoundDevicePortAudio : public SoundDevice {
public:
SoundDevicePortAudio(UserSettingsPointer config,
SoundManager* sm,
const PaDeviceInfo* deviceInfo,
PaHostApiTypeId deviceTypeId,
unsigned int devIndex);
~SoundDevicePortAudio() override;
SoundDeviceError open(bool isClkRefDevice, int syncBuffers) override;
bool isOpen() const override;
SoundDeviceError close() override;
void readProcess() override;
void writeProcess() override;
QString getError() const override;
// This callback function gets called everytime the sound device runs out of
// samples (ie. when it needs more sound to play)
int callbackProcess(const SINT framesPerBuffer,
CSAMPLE *output, const CSAMPLE* in,
const PaStreamCallbackTimeInfo *timeInfo,
PaStreamCallbackFlags statusFlags);
// Same as above but with drift correction
int callbackProcessDrift(const SINT framesPerBuffer,
CSAMPLE *output, const CSAMPLE* in,
const PaStreamCallbackTimeInfo *timeInfo,
PaStreamCallbackFlags statusFlags);
// The same as above but drives the MixxEngine
int callbackProcessClkRef(const SINT framesPerBuffer,
CSAMPLE *output, const CSAMPLE* in,
const PaStreamCallbackTimeInfo *timeInfo,
PaStreamCallbackFlags statusFlags);
unsigned int getDefaultSampleRate() const override {
return m_deviceInfo ? static_cast<unsigned int>(
m_deviceInfo->defaultSampleRate) : 44100;
}
private:
void updateCallbackEntryToDacTime(const PaStreamCallbackTimeInfo* timeInfo);
void updateAudioLatencyUsage(const SINT framesPerBuffer);
// PortAudio stream for this device.
PaStream* volatile m_pStream;
// Struct containing information about this device. Don't free() it, it
// belongs to PortAudio.
const PaDeviceInfo* m_deviceInfo;
const PaHostApiTypeId m_deviceTypeId;
// Description of the output stream going to the soundcard.
PaStreamParameters m_outputParams;
// Description of the input stream coming from the soundcard.
PaStreamParameters m_inputParams;
FIFO<CSAMPLE>* m_outputFifo;
FIFO<CSAMPLE>* m_inputFifo;
bool m_outputDrift;
bool m_inputDrift;
// A string describing the last PortAudio error to occur.
QString m_lastError;
// Whether we have set the thread priority to realtime or not.
bool m_bSetThreadPriority;
ControlProxy* m_pMasterAudioLatencyUsage;
mixxx::Duration m_timeInAudioCallback;
int m_framesSinceAudioLatencyUsageUpdate;
int m_syncBuffers;
int m_invalidTimeInfoCount;
PerformanceTimer m_clkRefTimer;
PaTime m_lastCallbackEntrytoDacSecs;
};
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