softer pthread exiting with pthread_exit

pulseauio thread now uses pthread_exit to exit if something unexpected happens
it also sets audio.terminate to 1 and writes the error message to a audio.error_message
so it can be printed by main thread after cleanup. this also enables main thread to
cleanup terminal upon unexpected error on audio thread

cava.c

@@ -350,6 +350,7 @@ as of 0.4.0 all options are specified in config file, see in '/home/username/.co
 		if (is_loop_device_for_sure(audio.source)) {
 			if (directory_exists("/sys/")) {
 				if (! directory_exists("/sys/module/snd_aloop/")) {
+      				cleanup();
 					fprintf(stderr,
 					"Linux kernel module \"snd_aloop\" does not seem to  be loaded.\n"
 					"Maybe run \"sudo modprobe snd_aloop\".\n");
@@ -369,11 +370,9 @@ as of 0.4.0 all options are specified in config file, see in '/home/username/.co
 			nanosleep (&req, NULL);
 			n++;
 			if (n > 2000) {
-			#ifdef DEBUG
 				cleanup();
 				fprintf(stderr,
 				"could not get rate and/or format, problems with audio thread? quiting...\n");
-			#endif
 				exit(EXIT_FAILURE);
 			}
 		}
@@ -808,6 +807,15 @@ as of 0.4.0 all options are specified in config file, see in '/home/username/.co
 			for (o = 0; o < bars; o++) {
 				flastd[o] = f[o];
 			}
+
+            //checking if audio thread has exited unexpectedly
+            if (audio.terminate == 1) {
+                cleanup();
+   				fprintf(stderr,
+                "Audio thread exited unexpectedly. %s\n", audio.error_message);
+                exit(EXIT_FAILURE); 
+            } 
+
 		}//resize terminal
         
 	}//reloading config

input/fifo.c

@@ -10,6 +10,7 @@ struct audio_data {
         int im; //input mode alsa, fifo or pulse
         int channels;
 	int terminate; // shared variable used to terminate audio thread
+        char error_message[1024];
 };
 
 

input/pulse.c

@@ -131,8 +131,10 @@ void* input_pulse(void* data)
 	int error;
 
 	if (!(s = pa_simple_new(NULL, "cava", PA_STREAM_RECORD, audio->source, "audio for cava", &ss, NULL, &pb, &error))) {
-		fprintf(stderr, __FILE__": Could not open pulseaudio source: %s, %s. To find a list of your pulseaudio sources run 'pacmd list-sources'\n",audio->source, pa_strerror(error));
-		exit(EXIT_FAILURE);
+		//fprintf(stderr, __FILE__": Could not open pulseaudio source: %s, %s. To find a list of your pulseaudio sources run 'pacmd list-sources'\n",audio->source, pa_strerror(error));
+        sprintf(audio->error_message, __FILE__": Could not open pulseaudio source: %s, %s. To find a list of your pulseaudio sources run 'pacmd list-sources'\n",audio->source, pa_strerror(error));
+		audio->terminate = 1;
+        pthread_exit(NULL);
 	}
 
 	n = 0;
@@ -140,8 +142,11 @@ void* input_pulse(void* data)
 	while (1) {
         	/* Record some data ... */
         	if (pa_simple_read(s, buf, sizeof(buf), &error) < 0) {
-            		fprintf(stderr, __FILE__": pa_simple_read() failed: %s\n", pa_strerror(error));
-        	exit(EXIT_FAILURE);
+            //fprintf(stderr, __FILE__": pa_simple_read() failed: %s\n", pa_strerror(error));
+        	//exit(EXIT_FAILURE);
+            sprintf(audio->error_message, __FILE__": pa_simple_read() failed: %s\n", pa_strerror(error));
+            audio->terminate = 1;
+            pthread_exit(NULL);
 		}
 
 		 //sorting out channels