WSJT-X/soundout.cpp
Joe Taylor 04c4b99a53 New JTMS3 definition (again). Now using 7-bit characters, as in
the JTMS of WSJT9.  Modulation changed to BPSK, speed increased 
from 1378.125 to 2000 baud.


git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/jtms3@2505 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
2012-07-12 19:10:39 +00:00

106 lines
3.0 KiB
C++

#include "soundout.h"
#define FRAMES_PER_BUFFER 256
extern "C" {
#include <portaudio.h>
}
extern float gran(); //Noise generator (for tests only)
extern short int iwave[30*48000]; //Wave file for Tx audio
extern int nwave;
extern bool btxok;
extern double outputLatency;
typedef struct //Parameters sent to or received from callback function
{
int dummy;
} paUserData;
//--------------------------------------------------------------- d2aCallback
extern "C" int d2aCallback(const void *inputBuffer, void *outputBuffer,
unsigned long framesToProcess,
const PaStreamCallbackTimeInfo* timeInfo,
PaStreamCallbackFlags statusFlags,
void *userData )
{
paUserData *udata=(paUserData*)userData;
short *wptr = (short*)outputBuffer;
unsigned int i;
static int ic=0;
for(i=0 ; i<framesToProcess; i++ ) {
short int i2=iwave[ic];
if(ic > nwave) i2=0;
// i2 = 500.0*(i2/32767.0 + 5.0*gran()); //Add noise (tests only!)
if(!btxok) i2=0;
*wptr++ = i2; //left
ic++;
}
if(ic >= nwave) {
ic=0;
}
return 0;
}
void SoundOutThread::run()
{
PaError paerr;
PaStreamParameters outParam;
PaStream *outStream;
paUserData udata;
quitExecution = false;
outParam.device=m_nDevOut; //Output device number
outParam.channelCount=1; //Number of analog channels
outParam.sampleFormat=paInt16; //Send short ints to PortAudio
outParam.suggestedLatency=0.05;
outParam.hostApiSpecificStreamInfo=NULL;
paerr=Pa_IsFormatSupported(NULL,&outParam,48000.0);
if(paerr<0) {
qDebug() << "PortAudio says requested output format not supported.";
qDebug() << paerr << m_nDevOut;
return;
}
// udata.nwave=m_nwave;
// udata.btxok=false;
paerr=Pa_OpenStream(&outStream, //Output stream
NULL, //No input parameters
&outParam, //Output parameters
48000.0, //Sample rate
FRAMES_PER_BUFFER, //Frames per buffer
paClipOff, //No clipping
d2aCallback, //output callbeck routine
&udata); //userdata
paerr=Pa_StartStream(outStream);
if(paerr<0) {
qDebug() << "Failed to start audio output stream.";
return;
}
const PaStreamInfo* p=Pa_GetStreamInfo(outStream);
outputLatency = p->outputLatency;
bool qe = quitExecution;
//---------------------------------------------- Soundcard output loop
while (!qe) {
qe = quitExecution;
if (qe) break;
// udata.nwave=m_nwave;
// if(m_txOK) udata.btxok=1;
// if(!m_txOK) udata.btxok=0;
msleep(100);
}
Pa_StopStream(outStream);
Pa_CloseStream(outStream);
}
void SoundOutThread::setOutputDevice(int n) //setOutputDevice()
{
if (isRunning()) return;
this->m_nDevOut=n;
}