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b1fd11b06b
rectangular pulses. git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/jtms3@2484 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
106 lines
3.0 KiB
C++
106 lines
3.0 KiB
C++
#include "soundout.h"
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#define FRAMES_PER_BUFFER 256
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extern "C" {
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#include <portaudio.h>
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}
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extern float gran(); //Noise generator (for tests only)
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extern short int iwave[30*48000]; //Wave file for Tx audio
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extern int nwave;
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extern bool btxok;
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extern double outputLatency;
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typedef struct //Parameters sent to or received from callback function
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{
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int dummy;
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} paUserData;
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//--------------------------------------------------------------- d2aCallback
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extern "C" int d2aCallback(const void *inputBuffer, void *outputBuffer,
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unsigned long framesToProcess,
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const PaStreamCallbackTimeInfo* timeInfo,
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PaStreamCallbackFlags statusFlags,
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void *userData )
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{
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paUserData *udata=(paUserData*)userData;
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short *wptr = (short*)outputBuffer;
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unsigned int i;
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static int ic=0;
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for(i=0 ; i<framesToProcess; i++ ) {
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short int i2=iwave[ic];
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if(ic > nwave) i2=0;
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// i2 = 500.0*(i2/32767.0 + 5.0*gran()); //Add noise (tests only!)
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if(!btxok) i2=0;
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*wptr++ = i2; //left
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ic++;
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}
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if(ic >= nwave) {
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ic=0;
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}
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return 0;
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}
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void SoundOutThread::run()
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{
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PaError paerr;
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PaStreamParameters outParam;
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PaStream *outStream;
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paUserData udata;
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quitExecution = false;
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outParam.device=m_nDevOut; //Output device number
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outParam.channelCount=1; //Number of analog channels
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outParam.sampleFormat=paInt16; //Send short ints to PortAudio
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outParam.suggestedLatency=0.05;
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outParam.hostApiSpecificStreamInfo=NULL;
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paerr=Pa_IsFormatSupported(NULL,&outParam,48000.0);
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if(paerr<0) {
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qDebug() << "PortAudio says requested output format not supported.";
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qDebug() << paerr << m_nDevOut;
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return;
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}
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// udata.nwave=m_nwave;
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// udata.btxok=false;
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paerr=Pa_OpenStream(&outStream, //Output stream
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NULL, //No input parameters
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&outParam, //Output parameters
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48000.0, //Sample rate
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FRAMES_PER_BUFFER, //Frames per buffer
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paClipOff, //No clipping
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d2aCallback, //output callbeck routine
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&udata); //userdata
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paerr=Pa_StartStream(outStream);
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if(paerr<0) {
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qDebug() << "Failed to start audio output stream.";
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return;
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}
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const PaStreamInfo* p=Pa_GetStreamInfo(outStream);
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outputLatency = p->outputLatency;
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bool qe = quitExecution;
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//---------------------------------------------- Soundcard output loop
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while (!qe) {
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qe = quitExecution;
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if (qe) break;
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// udata.nwave=m_nwave;
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// if(m_txOK) udata.btxok=1;
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// if(!m_txOK) udata.btxok=0;
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msleep(100);
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}
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Pa_StopStream(outStream);
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Pa_CloseStream(outStream);
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}
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void SoundOutThread::setOutputDevice(int n) //setOutputDevice()
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{
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if (isRunning()) return;
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this->m_nDevOut=n;
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}
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