log avi codec

stepmania/src/arch/MovieTexture/MovieTexture.cpp

@@ -1,14 +1,68 @@
 #include "global.h"
 #include "MovieTexture.h"
+#include "RageUtil.h"
+#include "RageLog.h"
 
 #if defined(WIN32)
 #include "MovieTexture_DShow.h"
 #endif
 
+#include <fstream>
+bool RageMovieTexture::GetFourCC( CString fn, CString &handler, CString &type )
+{
+	CString ignore, ext;
+	splitpath( fn, ignore, ignore, ext);
+	if( !ext.CompareNoCase(".mpg") ||
+		!ext.CompareNoCase(".mpeg") ||
+		!ext.CompareNoCase(".mpv") ||
+		!ext.CompareNoCase(".mpe") )
+	{
+		handler = type = "MPEG";
+		return true;
+	}
+
+	ifstream f;
+	f.exceptions( ifstream::eofbit | ifstream::failbit | ifstream::badbit );
+
+	try {
+		f.open(fn);
+
+		f.seekg( 0x70, ios_base::beg );
+		type = "    ";
+		f.read((char *) type.c_str(), 4);
+		for(int i = 0; i < 4; ++i)
+			if(type[i] < 0x20 || type[i] > 0x7E) type[i] = '?';
+
+		f.seekg( 0xBC, ios_base::beg );
+
+		handler = "    ";
+		f.read((char *) handler.c_str(), 4);
+		for(int i = 0; i < 4; ++i)
+			if(handler[i] < 0x20 || handler[i] > 0x7E) handler[i] = '?';
+	} catch(ifstream::failure e) {
+		LOG->Warn("error on %s: %s", fn.c_str(), e.what() );
+		handler = type = "";
+		return false;
+	}
+
+	return true;
+}
+
+static void DumpAVIDebugInfo( CString fn )
+{
+	CString type, handler;
+	if( !RageMovieTexture::GetFourCC( fn, handler, type ) )
+		return;
+
+	LOG->Info("Movie %s has handler '%s', type '%s'", fn.c_str(), handler.c_str(), type.c_str());
+}
+
 /* Try drivers in order of preference until we find one that works. */
 /* Well, eventually; for now it's DShow or bust.w */
 RageMovieTexture *MakeRageMovieTexture(RageTextureID ID)
 {
+	DumpAVIDebugInfo( ID.filename );
+
 #if defined(WIN32)
 	return new MovieTexture_DShow(ID);
 #else

stepmania/src/arch/MovieTexture/MovieTexture.h

@@ -21,6 +21,8 @@ public:
 	virtual void SetLooping(bool looping=true) { }
 
 	bool IsAMovie() const { return true; }
+
+	static bool GetFourCC( CString fn, CString &handler, CString &type );
 };
 
 RageMovieTexture *MakeRageMovieTexture(RageTextureID ID);