X-Git-Url: http://git.mutantstargoat.com/user/nuclear/?p=dosdemo;a=blobdiff_plain;f=src%2Faudio.h;fp=src%2Faudio.h;h=f362781fb8fbb755e9617da1b025f90da0bef0a2;hp=0000000000000000000000000000000000000000;hb=d956a9d9273eebfacfda58cb3bafff017269d5dc;hpb=93f68e445b0a4f10f2b15383aafed8a216a4a228

diff --git a/src/audio.h b/src/audio.h
new file mode 100644
index 0000000..f362781
--- /dev/null
+++ b/src/audio.h
@@ -0,0 +1,54 @@
+#ifndef AUDIO_H_
+#define AUDIO_H_
+
+enum { AU_STOPPED, AU_PLAYING };
+
+enum {
+	AU_CUR = 0x7000,
+	AU_VOLUP = 0x7100,
+	AU_VOLDN = 0x7200
+};
+
+struct au_module {
+	char *name;
+	void *impl;
+};
+
+int au_init(void);
+void au_shutdown(void);
+
+struct au_module *au_load_module(const char *fname);
+void au_free_module(struct au_module *mod);
+
+int au_play_module(struct au_module *mod);
+void au_update(void);
+int au_stop_module(struct au_module *mod);
+int au_module_state(struct au_module *mod);
+
+int au_volume(int vol);
+int au_sfx_volume(int vol);
+int au_music_volume(int vol);
+
+/* pay no attention to the man behind the curtain */
+#define AU_VOLADJ(vol, newvol) \
+	do { \
+		int d; \
+		switch(newvol & 0xff00) { \
+		case AU_CUR: \
+			return (vol); \
+		case AU_VOLUP: \
+			d = newvol & 0xff; \
+			(newvol) = (vol) + (d ? d : 16); \
+			if((newvol) >= 256) (newvol) = 255; \
+			break; \
+		case AU_VOLDN: \
+			d = newvol & 0xff; \
+			(newvol) = (vol) - (d ? d : 16); \
+			if((newvol) < 0) (newvol) = 0; \
+			break; \
+		default: \
+			break; \
+		} \
+	} while(0)
+
+#endif	/* AUDIO_H_ */