static gboolean
gst_nas_sink_unprepare (GstAudioSink * asink)
{
GstNasSink *sink = GST_NAS_SINK (asink);
if (sink->flow != AuNone) {
AuBool clocked;
int num_elements;
AuStatus status;
AuElement *oldelems;
GST_DEBUG_OBJECT (sink, "flushing buffer");
NAS_flush (sink);
oldelems =
AuGetElements (sink->audio, sink->flow, &clocked, &num_elements,
&status);
if (num_elements > 0) {
GST_DEBUG_OBJECT (sink, "GetElements status: %i", status);
if (oldelems)
AuFreeElements (sink->audio, num_elements, oldelems);
}
AuStopFlow (sink->audio, sink->flow, NULL);
AuReleaseScratchFlow (sink->audio, sink->flow, NULL);
sink->flow = AuNone;
}
sink->need_data = 0;
return TRUE;
}
static gboolean
NAS_createFlow (GstNasSink * sink, GstRingBufferSpec * spec)
{
AuElement elements[2];
AuUint32 buf_samples;
unsigned char format;
format = gst_nas_sink_sink_get_format (spec);
if (format == 0) {
GST_ELEMENT_ERROR (sink, RESOURCE, SETTINGS, (NULL),
("Unable to get format %d", spec->format));
return FALSE;
}
GST_DEBUG_OBJECT (sink, "Format: %d %d\n", spec->format, format);
sink->flow = AuGetScratchFlow (sink->audio, NULL);
if (sink->flow == 0) {
GST_DEBUG_OBJECT (sink, "couldn't get flow");
return FALSE;
}
/* free old Elements and reconnet to server, needed to change samplerate */
{
AuBool clocked;
int num_elements;
AuStatus status;
AuElement *oldelems;
oldelems =
AuGetElements (sink->audio, sink->flow, &clocked, &num_elements,
&status);
if (num_elements > 0) {
GST_DEBUG_OBJECT (sink, "GetElements status: %i", status);
if (oldelems)
AuFreeElements (sink->audio, num_elements, oldelems);
gst_nas_sink_close (GST_AUDIO_SINK (sink));
gst_nas_sink_open (GST_AUDIO_SINK (sink));
sink->flow = AuGetScratchFlow (sink->audio, NULL);
if (sink->flow == 0) {
GST_DEBUG_OBJECT (sink, "couldn't get flow");
return FALSE;
}
}
}
/* free old Elements and reconnet to server, needed to change samplerate */
{
AuBool clocked;
int num_elements;
AuStatus status;
AuElement *oldelems;
oldelems =
AuGetElements (sink->audio, sink->flow, &clocked, &num_elements,
&status);
if (num_elements > 0) {
GST_DEBUG_OBJECT (sink, "GetElements status: %i", status);
if (oldelems)
AuFreeElements (sink->audio, num_elements, oldelems);
gst_nas_sink_close (GST_AUDIO_SINK (sink));
gst_nas_sink_open (GST_AUDIO_SINK (sink));
sink->flow = AuGetScratchFlow (sink->audio, NULL);
if (sink->flow == 0) {
GST_DEBUG_OBJECT (sink, "couldn't get flow");
return FALSE;
}
}
}
buf_samples = spec->rate * NAS_SOUND_PORT_DURATION;
/*
spec->segsize = gst_util_uint64_scale (buf_samples * spec->bytes_per_sample,
spec->latency_time, GST_SECOND / GST_USECOND);
spec->segsize -= spec->segsize % spec->bytes_per_sample;
spec->segtotal = spec->buffer_time / spec->latency_time;
*/
spec->segsize = buf_samples * spec->bytes_per_sample;
spec->segtotal = 1;
GST_DEBUG_OBJECT (sink, "Rate %d Format %d tracks %d bufs %d %d/%d w %d",
spec->rate, format, spec->channels, (gint) buf_samples, spec->segsize,
spec->segtotal, spec->width);
AuMakeElementImportClient (&elements[0], /* element */
spec->rate, /* rate */
format, /* format */
spec->channels, /* number of tracks */
AuTrue, /* discart */
buf_samples, /* max samples */
(AuUint32) (buf_samples / 100 * AuSoundPortLowWaterMark),
/* low water mark */
0, /* num actions */
NULL);
sink->device = NAS_getDevice (sink->audio, spec->channels);
if (sink->device == AuNone) {
GST_DEBUG_OBJECT (sink, "no device with %i tracks found", spec->channels);
return FALSE;
}
AuMakeElementExportDevice (&elements[1], /* element */
0, /* input */
sink->device, /* device */
spec->rate, /* rate */
AuUnlimitedSamples, /* num samples */
0, /* num actions */
NULL); /* actions */
AuSetElements (sink->audio, /* server */
sink->flow, /* flow ID */
AuTrue, /* clocked */
2, /* num elements */
elements, /* elements */
NULL);
AuRegisterEventHandler (sink->audio, /* server */
AuEventHandlerIDMask, /* value mask */
0, /* type */
sink->flow, /* flow ID */
NAS_EventHandler, /* callback */
(AuPointer) sink); /* data */
AuStartFlow (sink->audio, sink->flow, NULL);
return TRUE;
}
