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//=============================================================================
// MusE
// Linux Music Editor
// $Id:$
//
// Copyright (C) 2002-2006 by Werner Schweer and others
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License version 2.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
//=============================================================================
#include "al/al.h"
#include "widgets/utils.h"
#include "audio.h"
#include "audiodev.h"
#include "globals.h"
#include "song.h"
static const unsigned dummyFrames = 1024;
static double startTime;
//---------------------------------------------------------
// DummyAudio
//---------------------------------------------------------
class DummyAudio : public AudioDriver {
float* buffer;
pthread_t dummyThread;
std::vector<QString> oPorts;
std::vector<QString> iPorts;
int realTimePriority;
public:
int state;
bool seekflag;
unsigned pos;
DummyAudio() {
state = Audio::STOP;
seekflag = false;
startTime = curTime();
posix_memalign((void**)&buffer, 16, sizeof(float) * dummyFrames);
}
virtual ~DummyAudio() {
free(buffer);
}
virtual bool init() { return true; }
virtual void start(int);
virtual void stop ();
virtual unsigned frameTime() const {
return lrint(curTime() * AL::sampleRate);
}
virtual unsigned lastFrameTime() const {
return lrint(startTime * AL::sampleRate);
}
virtual unsigned curFrame() const { return pos; }
virtual float* getBuffer(Port /*port*/, unsigned long nframes)
{
if (nframes > dummyFrames) {
fprintf(stderr, "error: segment size > %d\n", dummyFrames);
exit(-1);
}
memset(buffer, 0, nframes * sizeof(float));
return buffer;
}
virtual QList<PortName> outputPorts(bool midi = false);
virtual QList<PortName> inputPorts(bool midi = false);
virtual void registerClient() {}
virtual Port registerOutPort(const QString& s, bool) {
iPorts.push_back(QString(s));
Port port(0, iPorts.size() + 3000);
return port;
}
virtual Port registerInPort(const QString& s, bool) {
oPorts.push_back(QString(s));
Port port(0, oPorts.size() + 40);
return port;
}
virtual void unregisterPort(Port) {
/* if (long(p) >= 100)
oPorts.erase(oPorts.begin() + (long(p)-40));
else
iPorts.erase(iPorts.begin() + long(p)-30);
*/
}
virtual bool connect(Port, Port) { return true; }
virtual bool disconnect(Port, Port) { return true; }
virtual void setPortName(Port, const QString&) {}
virtual Port findPort(const QString& s) {
if (s == "input1")
return Port(0, 10);
if (s == "input2")
return Port(0, 11);
if (s == "output1")
return Port(0, 20);
if (s == "output2")
return Port(0, 21);
int k = 0;
for (std::vector<QString>::const_iterator i = iPorts.begin(); i != iPorts.end(); ++i, ++k) {
if (s == *i)
return Port(0, 30+k);
}
k = 0;
for (std::vector<QString>::const_iterator i = oPorts.begin(); i != oPorts.end(); ++i, ++k) {
if (s == *i)
return Port(0, 40);
}
return Port();
}
virtual QString portName(Port port) {
if (port.alsaPort() == 10)
return QString("input1");
if (port.alsaPort() == 11)
return QString("input2");
if (port.alsaPort() == 20)
return QString("output1");
if (port.alsaPort() == 21)
return QString("output2");
if (port.alsaPort() >= 40)
return QString(oPorts[port.alsaPort() - 40]);
else
return QString(iPorts[port.alsaPort() - 30]);
}
virtual int realtimePriority() const { return 40; }
virtual void startTransport() {
state = Audio::PLAY;
}
virtual void stopTransport() {
state = Audio::STOP;
}
virtual void seekTransport(unsigned n) {
seekflag = true;
pos = n;
}
virtual void setFreewheel(bool) {}
virtual void putEvent(Port, const MidiEvent&) {}
};
DummyAudio* dummyAudio;
//---------------------------------------------------------
// initDummyAudio
//---------------------------------------------------------
bool initDummyAudio()
{
dummyAudio = new DummyAudio();
audioDriver = dummyAudio;
return false;
}
//---------------------------------------------------------
// outputPorts
//---------------------------------------------------------
QList<PortName> DummyAudio::outputPorts(bool midi)
{
QList<PortName> clientList;
if (!midi) {
PortName p1;
p1.name = QString("output1");
p1.port = Port(0, 100);
PortName p2;
p2.name = QString("output2");
p2.port = Port(0, 101);
clientList.append(p1);
clientList.append(p2);
}
return clientList;
}
//---------------------------------------------------------
// inputPorts
//---------------------------------------------------------
QList<PortName> DummyAudio::inputPorts(bool midi)
{
QList<PortName> clientList;
if (!midi) {
PortName p1;
p1.name = QString("input1");
p1.port = Port(0, 0);
PortName p2;
p2.name = QString("input2");
p2.port = Port(0, 1);
clientList.append(p1);
clientList.append(p2);
}
return clientList;
}
//---------------------------------------------------------
// dummyLoop
//---------------------------------------------------------
static void* dummyLoop(void*)
{
#ifndef __APPLE__
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);
}
}
}
#endif
for (;;) {
if (audioState == AUDIO_RUNNING)
audio->process(segmentSize, dummyAudio->state);
else if (audioState == AUDIO_START1)
audioState = AUDIO_START2;
usleep(dummyFrames*1000000/AL::sampleRate);
if (dummyAudio->seekflag) {
audio->sync(Audio::STOP, dummyAudio->pos);
dummyAudio->seekflag = false;
}
if (dummyAudio->state == Audio::PLAY) {
dummyAudio->pos += dummyFrames;
}
}
pthread_exit(0);
}
//---------------------------------------------------------
// start
//---------------------------------------------------------
void DummyAudio::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));
}
}
if (pthread_create(&dummyThread, attributes, ::dummyLoop, this))
perror("creating thread failed:");
if (priority)
pthread_attr_destroy(attributes);
}
void DummyAudio::stop ()
{
pthread_cancel(dummyThread);
pthread_join(dummyThread, 0);
}
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