movie speedups

src/emufile.cpp

@@ -12,3 +12,17 @@ bool EMUFILE::readAllBytes(std::vector<u8>* dstbuf, const std::string& fname)
 	file.fread(&dstbuf->at(0),size);
 	return true;
 }
+
+EMUFILE* EMUFILE::memwrap(EMUFILE* fp)
+{
+	EMUFILE_FILE* file;
+	EMUFILE_MEMORY* mem;
+	file = dynamic_cast<EMUFILE_FILE*>(fp);
+	mem = dynamic_cast<EMUFILE_MEMORY*>(fp);
+	if(mem) return mem;
+	mem = new EMUFILE_MEMORY(file->size());
+	if(file->size()==0) return mem;
+	file->fread(mem->buf(),file->size());
+	delete file;
+	return mem;
+}

src/emufile.h

@@ -52,6 +52,10 @@ public:
 		: failbit(false)
 	{}
 
+
+	//takes control of the provided EMUFILE and returns a new EMUFILE which is guranteed to be in memory
+	static EMUFILE* memwrap(EMUFILE* fp);
+
 	virtual ~EMUFILE() {}
 	
 	static bool readAllBytes(std::vector<u8>* buf, const std::string& fname);
@@ -141,9 +145,19 @@ public:
 
 	virtual int fgetc() {
 		u8 temp;
-		if(_fread(&temp,1) != 1)
-			return EOF;
-		else return temp;
+
+		//need an optimized codepath
+		//if(_fread(&temp,1) != 1)
+		//	return EOF;
+		//else return temp;
+		u32 remain = len-pos;
+		if(remain<1) {
+			failbit = true;
+			return -1;
+		}
+		temp = buf()[pos];
+		pos++;
+		return temp;
 	}
 	virtual int fputc(int c) {
 		u8 temp = (u8)c;

src/movie.cpp

@@ -906,6 +906,7 @@ bool FCEUI_LoadMovie(const char *fname, bool _read_only, bool tasedit, int _paus
 	
 	strcpy(curMovieFilename, fname);
 	FCEUFILE *fp = FCEU_fopen(fname,0,"rb",0);
+	fp->stream = EMUFILE::memwrap(fp->stream);
 	if (!fp) return false;
 	if(fp->isArchive() && !_read_only) {
 		FCEU_PrintError("Cannot open a movie in read+write from an archive.");