added PortAudio support (and make it default)

Makefile

@@ -1,4 +1,4 @@
-CFLAGS = `pkg-config --cflags --libs ao openssl`
+CFLAGS = `pkg-config --cflags --libs openssl` -lportaudio
 
 hairtunes: hairtunes.c alac.c
 	gcc hairtunes.c alac.c -D__i386 -lm $(CFLAGS) -o hairtunes

hairtunes.c

@@ -33,7 +33,11 @@
 #include <netinet/in.h>
 #include <pthread.h>
 #include <openssl/aes.h>
+#if HAVE_AO
 #include <ao/ao.h>
+#else
+#include <portaudio.h>
+#endif
 #include <math.h>
 
 #ifdef FANCY_RESAMPLING
@@ -233,6 +237,8 @@ int main(int argc, char **argv) {
     }
     fprintf(stderr, "bye!\n");
     fflush(stderr);
+	
+	uninit_output();
 }
 
 void init_buffer(void) {
@@ -583,7 +589,11 @@ int stuff_buffer(double playback_rate, short *inptr, short *outptr) {
 }
 
 void *audio_thread_func(void *arg) {
-    ao_device *dev = arg;
+#if HAVE_AO
+    ao_device* dev = arg;
+#else
+	PaStream* stream = arg;
+#endif
     int i, play_samples;
 
     signed short buf_fill;
@@ -626,24 +636,74 @@ void *audio_thread_func(void *arg) {
 #endif
             play_samples = stuff_buffer(bf_playback_rate, inbuf, outbuf);
 
+#if HAVE_AO		
         ao_play(dev, (char *)outbuf, play_samples*4);
+#else
+		int err = Pa_WriteStream(stream, (char *)outbuf, play_samples*4);
+		if( err != paNoError ) {
+			printf(  "PortAudio error: %s\n", Pa_GetErrorText( err ) );
+			exit(1);
+		}
+#endif
     }
 }
 
+#define NUM_CHANNELS 2
+
 int init_output(void) {
+    int err;
+#if HAVE_AO
     ao_initialize();
     int driver = ao_default_driver_id();
 
     ao_sample_format fmt;
     fmt.bits = 16;
     fmt.rate = sampling_rate;
-    fmt.channels = 2;
+    fmt.channels = NUM_CHANNELS;
     fmt.byte_format = AO_FMT_LITTLE;
     fmt.matrix = 0;
     
     ao_device *dev = ao_open_live(driver, &fmt, 0);
+	void* arg = dev;
+#else
+	err = Pa_Initialize();
+	if( err != paNoError ) {
+		printf(  "PortAudio error: %s\n", Pa_GetErrorText( err ) );
+		exit(1);
+	}
 
-    int err;
+	PaStreamParameters outputParameters;
+	outputParameters.device = Pa_GetDefaultOutputDevice(); /* default output device */
+    outputParameters.channelCount = NUM_CHANNELS;
+    outputParameters.sampleFormat = paInt16;
+    outputParameters.suggestedLatency = Pa_GetDeviceInfo( outputParameters.device )->defaultHighOutputLatency;
+    outputParameters.hostApiSpecificStreamInfo = NULL;
+	
+    /* -- setup stream -- */
+	PaStream* stream = NULL;
+    err = Pa_OpenStream(
+						&stream,
+						NULL,
+						&outputParameters,
+						sampling_rate,
+						OUTFRAME_BYTES,
+						paClipOff,      /* we won't output out of range samples so don't bother clipping them */
+						NULL, /* no callback, use blocking API */
+						NULL ); /* no callback, so no callback userData */
+    if( err != paNoError ) {
+		printf(  "PortAudio error: %s\n", Pa_GetErrorText( err ) );
+		exit(1);
+	}
+	
+	err = Pa_StartStream( stream );
+    if( err != paNoError ) {
+		printf(  "PortAudio error: %s\n", Pa_GetErrorText( err ) );
+		exit(1);
+	}
+	
+	void* arg = stream;
+#endif
+	
 #ifdef FANCY_RESAMPLING
     if (fancy_resampling)
         src = src_new(SRC_SINC_MEDIUM_QUALITY, 2, &err);
@@ -652,5 +712,15 @@ int init_output(void) {
 #endif
 
     pthread_t audio_thread;
-    pthread_create(&audio_thread, NULL, audio_thread_func, dev);
+    pthread_create(&audio_thread, NULL, audio_thread_func, arg);
+}
+
+int uninit_output(void) {
+#if HAVE_AO
+#else
+	int err = Pa_Terminate();
+	if( err != paNoError )
+		printf(  "PortAudio error: %s\n", Pa_GetErrorText( err ) );	
+#endif
+	return 0;
 }