Add missing files from last commit.

src/sound_adlib.c

@@ -0,0 +1,62 @@
+#include <stdlib.h>
+#include "ibm.h"
+#include "device.h"
+#include "sound.h"
+
+#include "sound_adlib.h"
+#include "sound_opl.h"
+
+typedef struct adlib_t
+{
+        opl_t   opl;
+        int16_t buffer[SOUNDBUFLEN * 2];
+        int     pos;
+} adlib_t;
+
+static void adlib_poll(void *p)
+{
+        adlib_t *adlib = (adlib_t *)p;
+        
+        if (adlib->pos >= SOUNDBUFLEN) return;
+        
+        opl2_poll(&adlib->opl, &adlib->buffer[adlib->pos * 2], &adlib->buffer[(adlib->pos * 2) + 1]);
+        adlib->pos++;
+}
+
+static void adlib_get_buffer(int16_t *buffer, int len, void *p)
+{
+        adlib_t *adlib = (adlib_t *)p;
+        int c;
+
+        for (c = 0; c < len * 2; c++)
+                buffer[c] += adlib->buffer[c];
+
+        adlib->pos = 0;
+}
+
+void *adlib_init()
+{
+        adlib_t *adlib = malloc(sizeof(adlib_t));
+        memset(adlib, 0, sizeof(adlib_t));
+        
+        pclog("adlib_init\n");
+        opl2_init(&adlib->opl);
+        io_sethandler(0x0388, 0x0002, opl2_read, NULL, NULL, opl2_write, NULL, NULL, &adlib->opl);
+        sound_add_handler(adlib_poll, adlib_get_buffer, adlib);
+        return adlib;
+}
+
+void adlib_close(void *p)
+{
+        adlib_t *adlib = (adlib_t *)p;
+
+        free(adlib);
+}
+
+device_t adlib_device =
+{
+        "AdLib",
+        adlib_init,
+        adlib_close,
+        NULL
+};