Small code changes; add ability to find audio functions and data.

Audio is weird. I've been working for a few days to figure out how to
correctly render the audio but in that time I've done some other minor
refactors so I figured I migth as well just push those. Audio should be
coming soon, but no promises.

1 files changed, 55 insertions, 0 deletions

diff --git a/api.h b/api.h
index 8f42eaf..df8c191 100644
--- a/api.h
+++ b/api.h
@@ -21,6 +21,7 @@
 #define VENGINE_CLIENT_INTERFACE_VERSION "VEngineClient013"
 #define VENGINE_LAUNCHER_INTERFACE_VERSION "VENGINE_LAUNCHER_API_VERSION004"
 #define VENGINE_TOOL_INTERFACE_VERSION	"VENGINETOOL003"
+#define VENGINE_CVAR_INTERFACE_VERSION "VEngineCvar004"
 
 #include "intdef.h"
 #include "os.h"
@@ -55,6 +56,34 @@ struct enginetools {
 	} *vt;
 };
 
+struct cvar {
+	struct {
+		usize _pad[10];
+		struct concommand * (*VIRTUAL find_command)(struct cvar *this, const char *name);
+	} *vt;
+};
+
+struct cmdbase {
+	void **vt;
+	struct cmdbase *next;
+	bool registered;
+	const char *name;
+	const char *helpstring;
+	int flags;
+};
+
+struct concommand {
+	struct cmdbase base;
+	void *callback;
+};
+
+struct audio_device {
+	struct {
+		usize _pad[22];
+		void *transfer_samples;
+	} *vt;
+};
+
 struct movieinfo {
 	char name[256];
 	int curframe;
@@ -132,6 +161,29 @@ struct demoplayer {
 	} *vt;
 };
 
+/* EPIC HACK:
+ * Snd_WriteLinearBlastStereo16 is an inline asm function that starts with
+ * 
+ *	mov	ebx,snd_p
+ *	mov	edi,snd_out
+ *	mov	ecx,snd_linear_count
+ *	mov	esi,snd_vol
+ *
+ * Luckily for us, these are all the things that we need!!!!
+ * So, we just use the instructions as a struct so we don't have to copy 
+ * anything. It just works.
+ */
+struct soundstate {
+	u16 _mov_ebx;
+	int **snd_p;
+	u16 _mov_edi;
+	short **snd_out;
+	u16 _mov_ecx;
+	int *snd_linear_count;
+	u16 _mov_esi;
+	int *snd_vol;
+} __attribute__((packed));
+
 #ifndef NO_EXTERNS
 extern struct engserver *engserver;
 extern struct engclient *engclient;
@@ -141,10 +193,13 @@ extern struct demoplayer *demoplayer;
 extern struct videomode **videomode;
 extern struct movieinfo *movieinfo;
 extern void (*cbuf_addtext)(char *);
+extern void (*snd_recordbuffer)(void);
+extern struct soundstate *snd;
 #endif
 
 // initializes required engine apis. returns false on error.
 bool api_init(void);
+bool api_find_snd_recordbuffer(void);
 
 #endif