WSJT-X/soundin.cpp

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#include "soundin.h"
#include <stdexcept>
#define NFFT 32768
#define FRAMES_PER_BUFFER 1024
extern "C" {
#include <portaudio.h>
extern struct {
short int d2[30*48000]; //This is "common/mscom/..." in fortran
int kin;
} mscom_;
}
typedef struct
{
int kin; //Parameters sent to/from the portaudio callback function
bool bzero;
} paUserData;
//--------------------------------------------------------------- a2dCallback
extern "C" int a2dCallback( const void *inputBuffer, void *outputBuffer,
unsigned long framesToProcess,
const PaStreamCallbackTimeInfo* timeInfo,
PaStreamCallbackFlags statusFlags,
void *userData )
// This routine called by the PortAudio engine when samples are available.
// It may be called at interrupt level, so don't do anything
// that could mess up the system like calling malloc() or free().
{
paUserData *udata=(paUserData*)userData;
(void) outputBuffer; //Prevent unused variable warnings.
(void) timeInfo;
(void) userData;
int nbytes,k;
// if(framesToProcess != -99) return paContinue; //###
if( (statusFlags&paInputOverflow) != 0) {
qDebug() << "Input Overflow";
}
if(udata->bzero) { //Start of a new Rx sequence
udata->kin=0; //Reset buffer pointer
udata->bzero=false;
}
nbytes=2*framesToProcess; //Bytes per frame
k=udata->kin;
memcpy(&mscom_.d2[k],inputBuffer,nbytes); //Copy all samples to d2
udata->kin += framesToProcess;
mscom_.kin=udata->kin;
return paContinue;
}
void SoundInThread::run() //SoundInThread::run()
{
quitExecution = false;
//---------------------------------------------------- Soundcard Setup
PaError paerr;
PaStreamParameters inParam;
PaStream *inStream;
paUserData udata;
udata.kin=0; //Buffer pointer
udata.bzero=false; //Flag to request reset of kin
inParam.device=m_nDevIn; //### Input Device Number ###
inParam.channelCount=1; //Number of analog channels
inParam.sampleFormat=paInt16; //Get i*2 from Portaudio
inParam.suggestedLatency=0.05;
inParam.hostApiSpecificStreamInfo=NULL;
paerr=Pa_IsFormatSupported(&inParam,NULL,48000.0);
if(paerr<0) {
emit error("PortAudio says requested soundcard format not supported.");
// return;
}
paerr=Pa_OpenStream(&inStream, //Input stream
&inParam, //Input parameters
NULL, //No output parameters
48000.0, //Sample rate
FRAMES_PER_BUFFER, //Frames per buffer
// paClipOff+paDitherOff, //No clipping or dithering
paClipOff, //No clipping
a2dCallback, //Input callbeck routine
&udata); //userdata
paerr=Pa_StartStream(inStream);
if(paerr<0) {
emit error("Failed to start audio input stream.");
return;
}
bool qe = quitExecution;
int n30z=99;
int k=0;
int nsec;
int n30;
int nBusy=0;
int nstep0=0;
//---------------------------------------------- Soundcard input loop
while (!qe) {
qe = quitExecution;
if (qe) break;
qint64 ms = QDateTime::currentMSecsSinceEpoch() % 86400000;
nsec = ms/1000; // Time according to this computer
n30 = nsec % 30;
// Reset buffer pointer and symbol number at start of minute
if(n30 < n30z or !m_monitoring) {
nstep0=0;
udata.bzero=true;
}
k=udata.kin;
if(m_monitoring) {
m_step=k/2048;
if(m_step != nstep0) {
if(m_dataSinkBusy) {
nBusy++;
} else {
// m_dataSinkBusy=true;
emit readyForFFT(k); //Signal to compute new FFTs
}
nstep0=m_step;
}
}
msleep(10);
n30z=n30;
}
Pa_StopStream(inStream);
Pa_CloseStream(inStream);
}
void SoundInThread::setInputDevice(int n) //setInputDevice()
{
if (isRunning()) return;
this->m_nDevIn=n;
}
void SoundInThread::quit() //quit()
{
quitExecution = true;
}
void SoundInThread::setMonitoring(bool b) //setMonitoring()
{
m_monitoring = b;
}
int SoundInThread::mstep()
{
return m_step;
}