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engines/m4/fileio/fstream.h

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+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#ifndef M4_FILEIO_FSTREAM_H
+#define M4_FILEIO_FSTREAM_H
+
+#include "common/file.h"
+#include "m4/fileio/sys_file.h"
+#include "m4/mem/reloc.h"
+#include "m4/m4_types.h"
+
+namespace M4 {
+
+class StreamFile {
+private:
+	Common::File _file;
+public:
+	StreamFile(const Common::Path &filename);
+	~StreamFile() {}
+
+	int32 read(Handle bufferHandle, int32 n);
+	bool seek(uint32 n);
+	bool seek_ahead(int32 n);
+	uint32 get_pos();
+};
+
+struct strmRequest {
+	strmRequest *next;
+	strmRequest *prev;
+	SysFile *srcFile;
+	int32 strmSize;
+	MemHandle strmHandle;
+	uint8 *strmBuff;
+	uint8 *endStrmBuff;
+	uint8 *strmHead;
+	uint8 *strmTail;
+	uint8 *strmWrap;
+	uint8 *strmLastRead;
+	int32 nextReadSize;
+	int32 numBlocksToRead;
+	int32 *blockSizeArray;
+	bool wrapStream;
+};
+
+bool f_stream_Init();
+void f_stream_Shutdown();
+
+strmRequest *f_stream_Open(SysFile *srcFile, int32 fileOffset, int32 strmMinBuffSize, int32 strmBuffSize,
+	int32 numBlocksToRead, int32 *blockSizeArray, int32 initialRead, bool wrapStream);
+int32 f_stream_Read(strmRequest *myStream, uint8 **dest, int32 numBytes);
+void f_stream_Close(strmRequest *myStream);
+void f_stream_Process(int32 numToProcess);
+
+} // namespace M4
+
+#endif