examples/wakerec: add pm logic to wakerec example in audio

add pm suspend and resume logic to wakerec for testing purpose

Signed-off-by: Abhishek Akkabathula <a.akkabathul@samsung.com>

apps/examples/wakerec/wakerec.cxx

@@ -41,6 +41,8 @@
 #include <iostream>
 #include <memory>
 
+#include <tinyara/pm/pm.h>
+
 using namespace std;
 using namespace media;
 using namespace media::stream;
@@ -87,6 +89,9 @@ class _Observer : public media::MediaPlayerObserverInterface, public std::enable
 		printf("###################################\n");
 
 		sd->startKeywordDetect();
+
+		/* Now that we finished playback, we can go to sleep */
+		pm_resume(PM_IDLE_DOMAIN);
 	}
 	void onPlaybackError(media::MediaPlayer &mediaPlayer, media::player_error_t error) override
 	{
@@ -170,6 +175,8 @@ class SpeechDetectorListener : public media::voice::SpeechDetectorListenerInterf
 	{
 		printf("#### onSpeechDetectionListener\n");
 		if (event == SPEECH_DETECT_KD) {
+			/* take wakelock as soon as possible, and we hold it until we play recorded data */
+			pm_suspend(PM_IDLE_DOMAIN);
 			printf("Event SPEECH_DETECT_KD\n");
 			printf("#### [SD] keyword detected.\n");
 			if (gBuffer) {
@@ -273,6 +280,9 @@ int wakerec_main(int argc, char *argv[])
 		}
 	}
 	sd->startKeywordDetect();
+
+	/* similar to wake lock, we release wake lock as we started our thread */
+	pm_resume(PM_IDLE_DOMAIN);
 
 	while (1) {
 		sleep(67);