Add codecs to librbcodec.

Change-Id: Id7f4717d51ed02d67cb9f9cb3c0ada4a81843f97
Reviewed-on: http://gerrit.rockbox.org/137
Reviewed-by: Nils Wallménius <nils@rockbox.org>
Tested-by: Nils Wallménius <nils@rockbox.org>

lib/rbcodec/codecs/libgme/blargg_source.h

@@ -0,0 +1,76 @@
+// Included at the beginning of library source files, after all other #include lines
+#ifndef BLARGG_SOURCE_H
+#define BLARGG_SOURCE_H
+
+// If debugging is enabled and expr is false, abort program. Meant for checking
+// caller-supplied parameters and operations that are outside the control of the
+// module. A failed requirement indicates a bug outside the module.
+// void require( bool expr );
+#if defined(ROCKBOX)
+#undef assert
+#define assert( expr )
+#undef require
+#define require( expr )
+#else
+#undef require
+#define require( expr ) assert( expr )
+#endif
+
+// Like printf() except output goes to debug log file. Might be defined to do
+// nothing (not even evaluate its arguments).
+// void dprintf( const char* format, ... );
+#if defined(ROCKBOX)
+#define dprintf DEBUGF
+#else
+static inline void blargg_dprintf_( const char* fmt, ... ) { }
+#undef dprintf
+#define dprintf (1) ? (void) 0 : blargg_dprintf_
+#endif
+
+// If enabled, evaluate expr and if false, make debug log entry with source file
+// and line. Meant for finding situations that should be examined further, but that
+// don't indicate a problem. In all cases, execution continues normally.
+#undef check
+#define check( expr ) ((void) 0)
+
+/* If expr yields non-NULL error string, returns it from current function,
+otherwise continues normally. */
+#undef  RETURN_ERR
+#define RETURN_ERR( expr ) \
+	do {\
+		blargg_err_t blargg_return_err_ = (expr);\
+		if ( blargg_return_err_ )\
+			return blargg_return_err_;\
+	} while ( 0 )
+
+/* If ptr is NULL, returns out-of-memory error, otherwise continues normally. */
+#undef  CHECK_ALLOC
+#define CHECK_ALLOC( ptr ) \
+	do {\
+		if ( !(ptr) )\
+			return "Out of memory";\
+	} while ( 0 )
+
+#ifndef max
+	#define max(a,b) (((a) > (b)) ? (a) : (b))
+#endif
+
+#ifndef min
+	#define min(a,b) (((a) < (b)) ? (a) : (b))
+#endif
+
+// typedef unsigned char byte;
+typedef unsigned char blargg_byte;
+#undef  byte
+#define byte blargg_byte
+
+// deprecated
+#define BLARGG_CHECK_ALLOC CHECK_ALLOC
+#define BLARGG_RETURN_ERR RETURN_ERR
+
+// BLARGG_SOURCE_BEGIN: If defined, #included, allowing redefition of dprintf and check
+#ifdef BLARGG_SOURCE_BEGIN
+	#include BLARGG_SOURCE_BEGIN
+#endif
+
+#endif