static int init(struct xmp_context *ctx)
{
struct xmp_options *o = &ctx->o;
int channels, rate, format, buf_samples;
int duration, gain, watermark;
char *server;
AuDeviceID device = AuNone;
AuElement element[2];
char *token, **parm;
int i;
duration = 2;
gain = 100;
server = NULL;
watermark = 10;
channels = 2;
rate = o->freq;
parm_init();
chkparm1("duration", duration = atoi(token));
chkparm1("gain", gain = atoi(token));
chkparm1("server", server = token);
chkparm1("watermark", watermark = atoi(token));
parm_end();
if (o->resol == 8) {
format = o->outfmt & XMP_FMT_UNS ?
AuFormatLinearUnsigned8 : AuFormatLinearSigned8;
} else {
if (o->big_endian) {
format = o->outfmt & XMP_FMT_UNS ?
AuFormatLinearUnsigned16MSB :
AuFormatLinearSigned16MSB;
} else {
format = o-> outfmt & XMP_FMT_UNS ?
AuFormatLinearUnsigned16LSB :
AuFormatLinearSigned16LSB;
}
}
if (o->outfmt & XMP_FMT_MONO)
channels = 1;
info.aud = AuOpenServer(server, 0, NULL, 0, NULL, NULL);
if (!info.aud) {
fprintf(stderr, "xmp: drv_nas: can't connect to server %s\n",
server ? server : "");
return XMP_ERR_DINIT;
}
for (i = 0; i < AuServerNumDevices(info.aud); i++) {
if (((AuDeviceKind(AuServerDevice(info.aud, i)) ==
AuComponentKindPhysicalOutput) &&
AuDeviceNumTracks(AuServerDevice(info.aud, i)) ==
channels)) {
device =
AuDeviceIdentifier(AuServerDevice(info.aud, i));
break;
}
}
info.da = AuGetDeviceAttributes(info.aud, device, NULL);
if (!info.da) {
fprintf(stderr, "xmp: drv_nas: can't get device attributes\n");
AuCloseServer(info.aud);
return XMP_ERR_DINIT;
}
AuDeviceGain(info.da) = AuFixedPointFromSum(gain, 0);
AuSetDeviceAttributes(info.aud, AuDeviceIdentifier(info.da),
AuCompDeviceGainMask, info.da, NULL);
info.flow = AuCreateFlow(info.aud, NULL);
if (!info.flow) {
fprintf(stderr, "xmp: drv_nas: can't create flow\n");
AuCloseServer(info.aud);
return XMP_ERR_DINIT;
}
buf_samples = rate * duration;
AuMakeElementImportClient(&element[0], rate, format, channels, AuTrue,
buf_samples,
(AuUint32) (buf_samples * watermark / 100), 0,
NULL);
AuMakeElementExportDevice(&element[1], 0, device, rate,
AuUnlimitedSamples, 0, NULL);
AuSetElements(info.aud, info.flow, AuTrue, 2, element, NULL);
AuRegisterEventHandler(info.aud, AuEventHandlerIDMask, 0, info.flow,
nas_event, (AuPointer) & info);
info.buf_size = buf_samples * channels * AuSizeofFormat(format);
info.buf = (char *)malloc(info.buf_size);
info.buf_cnt = 0;
info.data_sent = AuFalse;
info.finished = AuFalse;
AuStartFlow(info.aud, info.flow, NULL);
return xmp_smix_on(ctx);
}
/* 0 on error */
static int nas_createFlow(out123_handle *ao)
{
AuDeviceID device = AuNone;
AuElement elements[2];
unsigned char format;
AuUint32 buf_samples;
int i;
switch(ao->format) {
case MPG123_ENC_SIGNED_16:
default:
if (((char) *(short *)"x")=='x') /* ugly, but painless */
format = AuFormatLinearSigned16LSB; /* little endian */
else
format = AuFormatLinearSigned16MSB; /* big endian */
break;
case MPG123_ENC_UNSIGNED_8:
format = AuFormatLinearUnsigned8;
break;
case MPG123_ENC_SIGNED_8:
format = AuFormatLinearSigned8;
break;
case MPG123_ENC_ULAW_8:
format = AuFormatULAW8;
break;
}
/* look for an output device */
for (i = 0; i < AuServerNumDevices(info.aud); i++)
if (((AuDeviceKind(AuServerDevice(info.aud, i)) ==
AuComponentKindPhysicalOutput) &&
AuDeviceNumTracks(AuServerDevice(info.aud, i))
== ao->channels )) {
device = AuDeviceIdentifier(AuServerDevice(info.aud, i));
break;
}
if (device == AuNone) {
error1("Couldn't find an output device providing %d channels.", ao->channels);
return 0;
}
/* set gain */
if(ao->gain >= 0) {
info.da = AuGetDeviceAttributes(info.aud, device, NULL);
if ((info.da)!=NULL) {
AuDeviceGain(info.da) = AuFixedPointFromSum(ao->gain, 0);
AuSetDeviceAttributes(info.aud, AuDeviceIdentifier(info.da),
AuCompDeviceGainMask, info.da, NULL);
}
else
error("audio/gain: setable Volume/PCM-Level not supported");
}
if (!(info.flow = AuCreateFlow(info.aud, NULL))) {
error("Couldn't create flow");
return 0;
}
buf_samples = ao->rate * NAS_SOUND_PORT_DURATION;
AuMakeElementImportClient(&elements[0], /* element */
(unsigned short) ao->rate,
/* rate */
format, /* format */
ao->channels, /* channels */
AuTrue, /* ??? */
buf_samples, /* max samples */
(AuUint32) (buf_samples / 100
* NAS_SOUND_LOW_WATER_MARK),
/* low water mark */
0, /* num actions */
NULL); /* actions */
AuMakeElementExportDevice(&elements[1], /* element */
0, /* input */
device, /* device */
(unsigned short) ao->rate,
/* rate */
AuUnlimitedSamples, /* num samples */
0, /* num actions */
NULL); /* actions */
AuSetElements(info.aud, /* Au server */
info.flow, /* flow ID */
AuTrue, /* clocked */
2, /* num elements */
elements, /* elements */
NULL); /* return status */
AuRegisterEventHandler(info.aud, /* Au server */
AuEventHandlerIDMask, /* value mask */
0, /* type */
info.flow, /* id */
nas_eventHandler, /* callback */
(AuPointer) &info); /* data */
info.buf_size = buf_samples * ao->channels * AuSizeofFormat(format);
info.buf = (char *) malloc(info.buf_size);
if (info.buf == NULL) {
error1("Unable to allocate input/output buffer of size %ld",
(long)info.buf_size);
return 0;
}
info.buf_cnt = 0;
info.data_sent = AuFalse;
info.finished = AuFalse;
AuStartFlow(info.aud, /* Au server */
info.flow, /* id */
NULL); /* status */
return 1; /* success */
}