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/* MPEG/WAVE Sound library
(C) 1997 by Jung woo-jae */
// Nasplayer.cc
// Playing raw audio over Network Audio System (by NCD)
// By Willem (willem@stack.nl)
#ifdef HAVE_NASPLAYER
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "mpegsound.h"
#include <unistd.h>
NASplayer::NASplayer(AuServer *aud)
{
this->aud = aud;
dev = AuNone;
format = AuNone;
flow = 0;
samplerate = 0;
channels = 0;
buffer_ms = 2500;
req_size = 0;
}
NASplayer::~NASplayer()
{
if (aud) {
if (flow) AuDestroyFlow(aud, flow, 0);
AuCloseServer(aud);
}
}
NASplayer *NASplayer::opendevice(char *server)
{
AuServer *aud;
aud = AuOpenServer(server, 0, 0, 0, 0, 0);
if (!aud) return NULL;
return new NASplayer(aud);
}
void NASplayer::abort(void)
{
if (!aud || !flow) return;
AuStopFlow(aud, flow, 0);
AuHandleEvents(aud);
req_size = 0;
AuStartFlow(aud, flow, 0);
}
bool NASplayer::setsoundtype(int stereo, int samplesize, int speed)
{
int changed = 0;
unsigned char newf = AuNone;
if (samplesize == 16) newf = AuFormatLinearSigned16LSB;
else newf = AuFormatLinearSigned8;
stereo = stereo ? 2 : 1;
if (stereo != channels) { channels = stereo; changed++; }
if (samplerate != speed) { samplerate = speed; changed++; }
if (newf != format) { format = newf; changed++; }
if (changed) return resetsoundtype();
return true;
}
static AuBool static_event_handler(AuServer *, AuEvent *ev,
AuEventHandlerRec *hnd)
{
NASplayer *np = (NASplayer *)(hnd->data);
return np->event_handler(ev);
}
bool NASplayer::resetsoundtype(void)
{
if (!aud) return seterrorcode(SOUND_ERROR_DEVOPENFAIL);
if (flow) {
AuUnregisterEventHandler(aud, evhnd);
AuDestroyFlow(aud, flow, 0);
}
flow = 0;
int i = 0;
while(true) {
if (i >= AuServerNumDevices(aud))
return seterrorcode(SOUND_ERROR_DEVCTRLERROR);
if ((AuDeviceKind(AuServerDevice(aud, i)) ==
AuComponentKindPhysicalOutput) &&
AuDeviceNumTracks(AuServerDevice(aud, i)) == channels)
{
dev = AuDeviceIdentifier(AuServerDevice(aud, i));
break;
}
i++;
}
flow = AuCreateFlow(aud, 0);
if (!flow) return seterrorcode(SOUND_ERROR_DEVCTRLERROR);
AuElement elms[3];
int buffer_size = (buffer_ms * samplerate) / 1000;
if (buffer_size < 8192) buffer_size = 8192;
AuMakeElementImportClient(elms, samplerate, format, channels, AuTrue,
buffer_size, buffer_size / 2, 0, 0);
AuMakeElementExportDevice(elms+1, 0, dev, samplerate,
AuUnlimitedSamples, 0, 0);
AuSetElements(aud, flow, AuTrue, 2, elms, 0);
evhnd = AuRegisterEventHandler(aud, AuEventHandlerIDMask, 0, flow,
static_event_handler, (AuPointer) this);
AuStartFlow(aud, flow, 0);
req_size = 0;
return true;
}
bool NASplayer::putblock(void *buffer, int size)
{
while (size > req_size) {
usleep(3);
AuHandleEvents(aud);
}
req_size -= size;
AuWriteElement(aud, flow, 0, size, buffer, AuFalse, 0);
return true;
}
int NASplayer::getblocksize(void)
{
return 2048;
}
int NASplayer::setvolume(int volume)
{
if (!aud) return 0;
AuDeviceAttributes *da = AuGetDeviceAttributes(aud, dev, NULL);
if (!da) return 0;
if (volume > 100) volume = 100;
if (volume > 0) {
AuDeviceGain(da) = AuFixedPointFromSum(volume, 0);
AuSetDeviceAttributes(aud, AuDeviceIdentifier(da),
AuCompDeviceGainMask, da, NULL);
AuFreeDeviceAttributes(aud, 1, da);
da = AuGetDeviceAttributes(aud, dev, NULL);
}
return AuFixedPointRoundUp(AuDeviceGain(da));
}
AuBool NASplayer::event_handler(AuEvent *ev)
{
switch (ev->type) {
case AuEventTypeElementNotify:
AuElementNotifyEvent *event = (AuElementNotifyEvent *)ev;
switch (event->kind) {
case AuElementNotifyKindLowWater:
req_size += event->num_bytes;
break;
case AuElementNotifyKindState:
switch (event->cur_state) {
case AuStatePause:
if (event->reason != AuReasonUser)
req_size += event->num_bytes;
break;
}
}
}
return AuTrue;
}
#endif /*\ HAVE_NASPLAYER \*/
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