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kpb: stop key phrase detection during draining #1363

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Merged
tlauda merged 1 commit into from
May 12, 2019
Merged

kpb: stop key phrase detection during draining #1363

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14 changes: 14 additions & 0 deletions src/audio/kpb.c
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Original file line number Diff line number Diff line change
Expand Up @@ -350,6 +350,7 @@ static int kpb_prepare(struct comp_dev *dev)
/* Init private data */
cd->kpb_no_of_clients = 0;
cd->buffered_data = 0;
cd->state = KPB_STATE_BUFFERING;

/* Init history buffer */
kpb_clear_history_buffer(cd->history_buffer);
Expand Down Expand Up @@ -436,12 +437,16 @@ static int kpb_reset(struct comp_dev *dev)
/* Reset history buffer */
kpb->is_internal_buffer_full = false;
kpb_clear_history_buffer(kpb->history_buffer);

/* Reset amount of buffered data */
kpb->buffered_data = 0;

/* Unregister KPB for async notification */
notifier_unregister(&kpb->kpb_events);

/* Reset KPB state to initial buffering state */
kpb->state = KPB_STATE_BUFFERING;

return comp_set_state(dev, COMP_TRIGGER_RESET);
}

Expand Down Expand Up @@ -472,6 +477,15 @@ static int kpb_copy(struct comp_dev *dev)
sink = (kpb->state == KPB_STATE_BUFFERING) ? kpb->rt_sink
: kpb->cli_sink;

/* Pause selector copy during draining and/or draining on demand.
* We keep selector in this "paused" state as long as draining
* is going and later during direct copy to client's/host sink,
* in so called "draining on demand" state. In order to rearm
* detection algorithm kpb_reset is needed.
*/
if (kpb->state != KPB_STATE_BUFFERING)
return PPL_STATUS_PATH_STOP;

/* Process source data */
/* Check if there are valid pointers */
if (!source || !sink)
Expand Down