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common/recorderfile.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 COMMON_RECORDERFILE_H
+#define COMMON_RECORDERFILE_H
+
+#include "common/scummsys.h"
+#include "common/events.h"
+#include "common/mutex.h"
+#include "common/memstream.h"
+#include "common/config-manager.h"
+#include "common/savefile.h"
+
+//capacity of records buffer
+#define kMaxBufferedRecords 10000
+#define kRecordBuffSize sizeof(RecorderEvent) * kMaxBufferedRecords
+
+namespace Common {
+
+enum RecorderEventType {
+	kRecorderEventTypeNormal = 0,
+	kRecorderEventTypeTimer = 1,
+	kRecorderEventTypeTimeDate = 2,
+	kRecorderEventTypeScreenUpdate = 3,
+};
+
+struct RecorderEvent : Event {
+	RecorderEventType recordedtype;
+	union {
+		uint32 time;
+		TimeDate timeDate;
+	};
+
+	RecorderEvent() {
+		recordedtype = kRecorderEventTypeNormal;
+		time = 0;
+		timeDate.tm_sec = 0;
+		timeDate.tm_min = 0;
+		timeDate.tm_hour = 0;
+		timeDate.tm_mday = 0;
+		timeDate.tm_mon = 0;
+		timeDate.tm_year = 0;
+		timeDate.tm_wday = 0;
+	}
+
+	RecorderEvent(const Event &e) : Event(e) {
+		recordedtype = kRecorderEventTypeNormal;
+		time = 0;
+		timeDate.tm_sec = 0;
+		timeDate.tm_min = 0;
+		timeDate.tm_hour = 0;
+		timeDate.tm_mday = 0;
+		timeDate.tm_mon = 0;
+		timeDate.tm_year = 0;
+		timeDate.tm_wday = 0;
+	}
+};
+
+
+
+class PlaybackFile {
+	typedef HashMap<String, uint32, IgnoreCase_Hash, IgnoreCase_EqualTo> RandomSeedsDictionary;
+	enum fileMode {
+		kRead = 0,
+		kWrite = 1,
+		kClosed = 2
+	};
+	enum PlaybackFileState {
+		kFileStateCheckFormat,
+		kFileStateCheckVersion,
+		kFileStateProcessHash,
+		kFileStateProcessHeader,
+		kFileStateProcessRandom,
+		kFileStateSelectSection,
+		kFileStateProcessSettings,
+		kFileStateProcessSave,
+		kFileStateDone,
+		kFileStateError
+	};
+	enum FileTag {
+		kFormatIdTag = MKTAG('P','B','C','K'),
+		kVersionTag = MKTAG('V','E','R','S'),
+		kHeaderSectionTag = MKTAG('H','E','A','D'),
+		kHashSectionTag = MKTAG('H','A','S','H'),
+		kRandomSectionTag = MKTAG('R','A','N','D'),
+		kEventTag = MKTAG('E','V','N','T'),
+		kScreenShotTag = MKTAG('T','H','M','B'),
+		kSettingsSectionTag = MKTAG('S','E','T','T'),
+		kAuthorTag = MKTAG('H','A','U','T'),
+		kCommentsTag = MKTAG('H','C','M','T'),
+		kNameTag = MKTAG('H','N','A','M'),
+		kHashRecordTag = MKTAG('H','R','C','D'),
+		kRandomRecordTag = MKTAG('R','R','C','D'),
+		kSettingsRecordTag = MKTAG('S','R','E','C'),
+		kSettingsRecordKeyTag = MKTAG('S','K','E','Y'),
+		kSettingsRecordValueTag = MKTAG('S','V','A','L'),
+		kSaveTag = MKTAG('S','A','V','E'),
+		kSaveRecordTag = MKTAG('R','S','A','V'),
+		kSaveRecordNameTag = MKTAG('S','N','A','M'),
+		kSaveRecordBufferTag = MKTAG('S','B','U','F'),
+		kMD5Tag = MKTAG('M','D','5',' ')
+	};
+	struct ChunkHeader {
+		FileTag id;
+		uint32 len;
+	};
+public:
+	struct SaveFileBuffer {
+		byte *buffer;
+		uint32 size;
+	};
+	struct PlaybackFileHeader {
+		String fileName;
+		String author;
+		String name;
+		String notes;
+		String description;
+		StringMap hashRecords;
+		StringMap settingsRecords;
+		HashMap<String, SaveFileBuffer> saveFiles;
+		RandomSeedsDictionary randomSourceRecords;
+	};
+	PlaybackFile();
+	~PlaybackFile();
+
+	bool openWrite(const String &fileName);
+	bool openRead(const String &fileName);
+	void close();
+
+	bool hasNextEvent() const;
+	RecorderEvent getNextEvent();
+	void writeEvent(const RecorderEvent &event);
+
+	void saveScreenShot(Graphics::Surface &screen, byte md5[16]);
+	Graphics::Surface *getScreenShot(int number);
+	int getScreensCount();
+
+	bool isEventsBufferEmpty() const;
+	PlaybackFileHeader &getHeader() {return _header;}
+	void updateHeader();
+	void addSaveFile(const String &fileName, InSaveFile *saveStream);
+
+	uint32 getVersion() const {return _version;}
+private:
+	Array<byte> _tmpBuffer;
+	WriteStream *_recordFile;
+	WriteStream *_writeStream;
+	WriteStream *_screenshotsFile;
+	MemoryReadStream _tmpPlaybackFile;
+	SeekableReadStream *_readStream;
+	SeekableMemoryWriteStream _tmpRecordFile;
+
+	fileMode _mode;
+	bool _headerDumped;
+	int _recordCount;
+	uint32 _eventsSize;
+	PlaybackFileHeader _header;
+	PlaybackFileState _playbackParseState;
+	uint32 _version;
+
+	void skipHeader();
+	bool parseHeader();
+	bool processChunk(ChunkHeader &nextChunk);
+	void returnToChunkHeader();
+
+	bool readSaveRecord();
+	void checkRecordedMD5();
+	bool readChunkHeader(ChunkHeader &nextChunk);
+	void processRndSeedRecord(ChunkHeader chunk);
+	bool processSettingsRecord();
+
+	bool checkPlaybackFileVersion();
+
+	void dumpHeaderToFile();
+	void writeSaveFilesSection();
+	void writeGameSettings();
+	void writeHeaderSection();
+	void writeGameHash();
+	void writeRandomRecords();
+
+	void dumpRecordsToFile();
+
+	String readString(int len);
+	void readHashMap(ChunkHeader chunk);
+
+	bool skipToNextScreenshot();
+	void readEvent(RecorderEvent& event);
+	void readEventsToBuffer(uint32 size);
+	bool grabScreenAndComputeMD5(Graphics::Surface &screen, uint8 md5[16]);
+};
+
+} // End of namespace Common
+
+#endif