[xmp] Call ALSA using sound driver structure

Signed-off-by: Claudio Matsuoka <cmatsuoka@gmail.com>

src/main.c

@@ -8,10 +8,13 @@
 #include <signal.h>
 #include <sys/time.h>
 #include <xmp.h>
-//#include "sound.h"
+#include "sound.h"
 #include "common.h"
 
 extern int optind;
+extern struct sound_driver sound_alsa;
+
+struct sound_driver *sound = &sound_alsa;
 
 static void cleanup(int sig)
 {
@@ -21,7 +24,7 @@ static void cleanup(int sig)
 	signal(SIGFPE, SIG_DFL);
 	signal(SIGSEGV, SIG_DFL);
 
-	sound_deinit();
+	sound->deinit();
 	reset_tty();
 
 	signal(sig, SIG_DFL);
@@ -66,7 +69,7 @@ int main(int argc, char **argv)
 		shuffle(argc - optind + 1, &argv[optind - 1]);
 	}
 
-	if (sound_init(44100, 2) < 0) {
+	if (sound->init(44100, 2) < 0) {
 		fprintf(stderr, "%s: can't initialize sound\n", argv[0]);
 		exit(EXIT_FAILURE);
 	}
@@ -115,7 +118,7 @@ int main(int argc, char **argv)
 					break;
 
 				info_frame(&mi, new_mod);
-				sound_play(mi.buffer, mi.buffer_size);
+				sound->play(mi.buffer, mi.buffer_size);
 
 				new_mod = 0;
 				options.start = 0;
@@ -124,14 +127,14 @@ int main(int argc, char **argv)
 			xmp_player_end(ctx);
 		}
 
+		sound->flush();
 		xmp_release_module(ctx);
 		printf("\n");
 	}
-	xmp_free_context(ctx);
 
+	xmp_free_context(ctx);
 	reset_tty();
-
-	sound_deinit();
+	sound->deinit();
 
 	exit(EXIT_SUCCESS);
 }

src/sound.h

@@ -3,9 +3,11 @@ struct sound_driver {
 	char *id;
 	char *description;
 	char **help;
-	int (*init) ();
-        void (*deinit) ();
-        void (*pause) ();
-        void (*resume) ();
+	int (*init)(int, int);
+        void (*deinit)();
+	void (*play)(void *, int);
+        void (*flush)();
+        void (*pause)();
+        void (*resume)();
         struct list_head *next;
 };

src/sound_alsa.c

@@ -6,7 +6,7 @@
 static snd_pcm_t *pcm_handle;
 
 
-int sound_init(int sampling_rate, int channels)
+static int init(int sampling_rate, int channels)
 {
 	snd_pcm_hw_params_t *hwparams;
 	int ret;
@@ -51,7 +51,7 @@ int sound_init(int sampling_rate, int channels)
 	return 0;
 }
 
-void sound_play(void *b, int i)
+static void play(void *b, int i)
 {
 	int frames;
 
@@ -61,10 +61,40 @@ void sound_play(void *b, int i)
 	}
 }
 
-void sound_deinit()
+static void deinit()
 {
-	/* snd_pcm_drain(pcm_handle); */
 	snd_pcm_close(pcm_handle);
 }
 
+static void flush()
+{
+	snd_pcm_drain(pcm_handle);
+}
+
+static void onpause()
+{
+}
+
+static void onresume()
+{
+}
+
+
+static char *help[] = {
+	"buffer=num", "Set the ALSA buffer time in milliseconds",
+	"period=num", "Set the ALSA period time in milliseconds",
+	"card <name>", "Select sound card to use",
+	NULL
+};
 
+struct sound_driver sound_alsa = {
+	"alsa",
+	"ALSA pcm audio",
+	help,
+	init,
+	deinit,
+	play,
+	flush,
+	onpause,
+	onresume	
+};