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//=========================================================
// MusE
// Linux Music Editor
// $Id: dummyaudio.cpp,v 1.3.2.16 2009/12/20 05:00:35 terminator356 Exp $
// (C) Copyright 2002-2003 Werner Schweer (ws@seh.de)
//=========================================================
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <stdarg.h>
#include <pthread.h>
#include <sys/poll.h>
#include "config.h"
#include "audio.h"
#include "audiodev.h"
#include "globals.h"
#include "song.h"
#include "driver/alsatimer.h"
#include "pos.h"
#define DEBUG_DUMMY 0
//---------------------------------------------------------
// DummyAudioDevice
//---------------------------------------------------------
static const unsigned dummyFrames = 1024;
enum Cmd {
trSeek,
trStart,
trStop
};
struct Msg {
enum Cmd cmd;
int arg;
};
class DummyAudioDevice : public AudioDevice {
pthread_t dummyThread;
// Changed by Tim. p3.3.15
//float buffer[1024];
float* buffer;
int realTimePriority;
public:
std::list<Msg> cmdQueue;
Audio::State state;
int _framePos;
int playPos;
bool realtimeFlag;
DummyAudioDevice();
virtual ~DummyAudioDevice()
{
// Added by Tim. p3.3.15
free(buffer);
}
//virtual void start();
virtual void start(int);
virtual void stop ();
virtual int framePos() const {
if(DEBUG_DUMMY)
printf("DummyAudioDevice::framePos %d\n", _framePos);
return _framePos;
}
virtual float* getBuffer(void* /*port*/, unsigned long nframes)
{
if (nframes > dummyFrames) {
printf("error: segment size > 1024\n");
exit(-1);
}
return buffer;
}
virtual std::list<QString> outputPorts();
virtual std::list<QString> inputPorts();
virtual void registerClient() {}
virtual void* registerOutPort(const char*) {
return (void*)1;
}
virtual void* registerInPort(const char*) {
return (void*)2;
}
virtual void unregisterPort(void*) {}
virtual void connect(void*, void*) {}
virtual void disconnect(void*, void*) {}
virtual void setPortName(void*, const char*) {}
virtual void* findPort(const char*) { return 0;}
virtual QString portName(void*) {
return QString("mops");
}
virtual int getState() {
// if(DEBUG_DUMMY)
// printf("DummyAudioDevice::getState %d\n", state);
return state; }
virtual unsigned getCurFrame() {
if(DEBUG_DUMMY)
printf("DummyAudioDevice::getCurFrame %d\n", _framePos);
return _framePos; }
virtual bool isRealtime() { return realtimeFlag; }
virtual int realtimePriority() const { return 40; }
virtual void startTransport() {
if(DEBUG_DUMMY)
printf("DummyAudioDevice::startTransport playPos=%d\n", playPos);
Msg trcmd;
trcmd.cmd = trStart;
trcmd.arg = playPos;
cmdQueue.push_front(trcmd);
/* state = Audio::START_PLAY;
audio->sync(state, playPos);
state = Audio::PLAY;*/
}
virtual void stopTransport() {
if(DEBUG_DUMMY)
printf("DummyAudioDevice::stopTransport, playPos=%d\n", playPos);
state = Audio::STOP;
}
virtual int setMaster(bool) { return 1; }
virtual void seekTransport(const Pos &p)
{
if(DEBUG_DUMMY)
printf("DummyAudioDevice::seekTransport frame=%d topos=%d\n",playPos, p.frame());
Msg trcmd;
trcmd.cmd = trSeek;
trcmd.arg = p.frame();
cmdQueue.push_front(trcmd);
playPos = p.frame();
}
virtual void seekTransport(unsigned pos) {
if(DEBUG_DUMMY)
printf("DummyAudioDevice::seekTransport frame=%d topos=%d\n",playPos,pos);
Msg trcmd;
trcmd.cmd = trSeek;
trcmd.arg = pos;
cmdQueue.push_front(trcmd);
playPos = pos;
/*
Audio::State tempState = state;
state = Audio::START_PLAY;
audio->sync(state, playPos);
state = tempState;*/
}
virtual void setFreewheel(bool) {}
void setRealTime() { realtimeFlag = true; }
};
DummyAudioDevice* dummyAudio = 0;
DummyAudioDevice::DummyAudioDevice()
{
// Added by Tim. p3.3.15
posix_memalign((void**)&buffer, 16, sizeof(float) * dummyFrames);
realtimeFlag = false;
state = Audio::STOP;
_framePos = 0;
playPos = 0;
cmdQueue.clear();
}
//---------------------------------------------------------
// exitDummyAudio
//---------------------------------------------------------
void exitDummyAudio()
{
if(dummyAudio)
delete dummyAudio;
dummyAudio = NULL;
audioDevice = NULL;
}
//---------------------------------------------------------
// initDummyAudio
//---------------------------------------------------------
bool initDummyAudio()
{
dummyAudio = new DummyAudioDevice();
audioDevice = dummyAudio;
return false;
}
//---------------------------------------------------------
// outputPorts
//---------------------------------------------------------
std::list<QString> DummyAudioDevice::outputPorts()
{
std::list<QString> clientList;
clientList.push_back(QString("output1"));
clientList.push_back(QString("output2"));
return clientList;
}
//---------------------------------------------------------
// inputPorts
//---------------------------------------------------------
std::list<QString> DummyAudioDevice::inputPorts()
{
std::list<QString> clientList;
clientList.push_back(QString("input1"));
clientList.push_back(QString("input2"));
return clientList;
}
//---------------------------------------------------------
// dummyLoop
//---------------------------------------------------------
static void* dummyLoop(void* ptr)
{
//unsigned int tickRate = 25;
sampleRate = 25600;
segmentSize = dummyFrames;
unsigned int tickRate = sampleRate / dummyFrames;
AlsaTimer timer;
fprintf(stderr, "Finding best alsa timer for dummy driver:\n");
timer.setFindBestTimer(false);
int fd = timer.initTimer();
/* Depending on nature of the timer, the requested tickRate might not
* be available. The return value is the nearest available frequency,
* so use this to reset our dummpy sampleRate to keep everything
* consistent.
*/
tickRate = timer.setTimerFreq( /*250*/ tickRate );
sampleRate = tickRate * segmentSize;
timer.startTimer();
DummyAudioDevice *drvPtr = (DummyAudioDevice *)ptr;
pollfd myPollFd;
myPollFd.fd = fd;
myPollFd.events = POLLIN;
/*
doSetuid();
struct sched_param rt_param;
int rv;
memset(&rt_param, 0, sizeof(sched_param));
int type;
rv = pthread_getschedparam(pthread_self(), &type, &rt_param);
if (rv != 0)
perror("get scheduler parameter");
if (type != SCHED_FIFO) {
fprintf(stderr, "Driver thread not running SCHED_FIFO, trying to set...\n");
memset(&rt_param, 0, sizeof(sched_param));
//rt_param.sched_priority = 1;
rt_param.sched_priority = realtimePriority();
rv = pthread_setschedparam(pthread_self(), SCHED_FIFO, &rt_param);
if (rv != 0)
perror("set realtime scheduler");
memset(&rt_param, 0, sizeof(sched_param));
rv = pthread_getschedparam(pthread_self(), &type, &rt_param);
if (rv != 0)
perror("get scheduler parameter");
if (type == SCHED_FIFO) {
drvPtr->setRealTime();
fprintf(stderr, "Thread succesfully set to SCHED_FIFO\n");
}
else {
fprintf(stderr, "Unable to set thread to SCHED_FIFO\n");
}
}
undoSetuid();
*/
#ifndef __APPLE__
doSetuid();
if (realTimePriority) {
//
// check if we really got realtime priviledges
//
int policy;
if ((policy = sched_getscheduler (0)) < 0) {
printf("cannot get current client scheduler for audio dummy thread: %s!\n", strerror(errno));
}
else
{
if (policy != SCHED_FIFO)
printf("audio dummy thread _NOT_ running SCHED_FIFO\n");
else if (debugMsg) {
struct sched_param rt_param;
memset(&rt_param, 0, sizeof(sched_param));
int type;
int rv = pthread_getschedparam(pthread_self(), &type, &rt_param);
if (rv == -1)
perror("get scheduler parameter");
printf("audio dummy thread running SCHED_FIFO priority %d\n",
rt_param.sched_priority);
}
}
}
undoSetuid();
#endif
/* unsigned long tick = 0;*/ // prevent compiler warning: unused variable
for (;;) {
int _pollWait = 10; // ms
unsigned long count = 0;
while (count < 1 /*250/tickRate*/) // will loop until the next tick occurs
{
/*int n = */ poll(&myPollFd, 1 /* npfd */, _pollWait);
count += timer.getTimerTicks();
while (drvPtr->cmdQueue.size())
{
Msg &msg = drvPtr->cmdQueue.back();
drvPtr->cmdQueue.pop_back();
switch(msg.cmd) {
case trSeek:
{
//printf("trSeek\n");
drvPtr->playPos = msg.arg;
Audio::State tempState = drvPtr->state;
drvPtr->state = Audio::START_PLAY;
audio->sync(drvPtr->state, msg.arg);
drvPtr->state = tempState;
}
break;
case trStart:
{
//printf("trStart\n");
drvPtr->state = Audio::START_PLAY;
audio->sync(drvPtr->state, msg.arg);
drvPtr->state = Audio::PLAY;
}
break;
case trStop:
break;
default:
printf("dummyLoop: Unknown command!\n");
}
}
}
audio->process(segmentSize);
int increment = segmentSize; // 1 //tickRate / sampleRate * segmentSize;
drvPtr->_framePos+=increment;
if (drvPtr->state == Audio::PLAY)
{
drvPtr->playPos+=increment;
}
}
timer.stopTimer();
pthread_exit(0);
}
//void DummyAudioDevice::start()
void DummyAudioDevice::start(int priority)
{
realTimePriority = priority;
pthread_attr_t* attributes = 0;
if (priority) {
attributes = (pthread_attr_t*) malloc(sizeof(pthread_attr_t));
pthread_attr_init(attributes);
if (pthread_attr_setschedpolicy(attributes, SCHED_FIFO)) {
printf("cannot set FIFO scheduling class for RT thread\n");
}
if (pthread_attr_setscope (attributes, PTHREAD_SCOPE_SYSTEM)) {
printf("Cannot set scheduling scope for RT thread\n");
}
struct sched_param rt_param;
memset(&rt_param, 0, sizeof(rt_param));
rt_param.sched_priority = priority;
if (pthread_attr_setschedparam (attributes, &rt_param)) {
printf("Cannot set scheduling priority %d for RT thread (%s)\n",
priority, strerror(errno));
}
}
//pthread_attr_t* attributes = (pthread_attr_t*) malloc(sizeof(pthread_attr_t));
//pthread_attr_init(attributes);
if (pthread_create(&dummyThread, attributes, ::dummyLoop, this))
perror("creating thread failed:");
if (priority)
pthread_attr_destroy(attributes);
}
void DummyAudioDevice::stop ()
{
pthread_cancel(dummyThread);
pthread_join(dummyThread, 0);
dummyThread = 0;
}
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