Merge branch 'master' into tsage_r2r

1 files changed, 708 insertions, 0 deletions

diff --git a/common/recorderfile.cpp b/common/recorderfile.cpp
new file mode 100644
index 0000000000..60c47e11ce
--- /dev/null
+++ b/common/recorderfile.cpp
@@ -0,0 +1,708 @@
+/* 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 2
+ * 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, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ */
+
+#include "common/system.h"
+#include "gui/EventRecorder.h"
+#include "common/md5.h"
+#include "common/recorderfile.h"
+#include "common/savefile.h"
+#include "common/bufferedstream.h"
+#include "graphics/thumbnail.h"
+#include "graphics/surface.h"
+#include "graphics/scaler.h"
+
+#define RECORD_VERSION 1
+
+namespace Common {
+
+PlaybackFile::PlaybackFile() : _tmpRecordFile(_tmpBuffer, kRecordBuffSize), _tmpPlaybackFile(_tmpBuffer, kRecordBuffSize) {
+	_readStream = NULL;
+	_writeStream = NULL;
+	_screenshotsFile = NULL;
+	_mode = kClosed;
+}
+
+PlaybackFile::~PlaybackFile() {
+	close();
+}
+
+bool PlaybackFile::openWrite(const String &fileName) {
+	close();
+	_header.fileName = fileName;
+	_writeStream = wrapBufferedWriteStream(g_system->getSavefileManager()->openForSaving(fileName), 128 * 1024);
+	_headerDumped = false;
+	_recordCount = 0;
+	if (_writeStream == NULL) {
+		return false;
+	}
+	_mode = kWrite;
+	return true;
+}
+
+bool PlaybackFile::openRead(const String &fileName) {
+	close();
+	_header.fileName = fileName;
+	_eventsSize = 0;
+	_tmpPlaybackFile.seek(0);
+	_readStream = wrapBufferedSeekableReadStream(g_system->getSavefileManager()->openForLoading(fileName), 128 * 1024, DisposeAfterUse::YES);
+	if (_readStream == NULL) {
+		debugC(1, kDebugLevelEventRec, "playback:action=\"Load File\" result=fail reason=\"file %s not found\"", fileName.c_str());
+		return false;
+	}
+	if (!parseHeader()) {
+		debugC(1, kDebugLevelEventRec, "playback:action=\"Load File\" result=fail reason=\"header parsing failed\"");
+		return false;
+	}
+	_screenshotsFile = wrapBufferedWriteStream(g_system->getSavefileManager()->openForSaving("screenshots.bin"), 128 * 1024);
+	debugC(1, kDebugLevelEventRec, "playback:action=\"Load File\" result=success");
+	_mode = kRead;
+	return true;
+}
+
+void PlaybackFile::close() {
+	delete _readStream;
+	_readStream = NULL;
+	if (_writeStream != NULL) {
+		dumpRecordsToFile();
+		_writeStream->finalize();
+		delete _writeStream;
+		_writeStream = NULL;
+		updateHeader();
+	}
+	if (_screenshotsFile != NULL) {
+		_screenshotsFile->finalize();
+		delete _screenshotsFile;
+		_screenshotsFile = NULL;
+	}
+	for (HashMap<String, SaveFileBuffer>::iterator  i = _header.saveFiles.begin(); i != _header.saveFiles.end(); ++i) {
+		free(i->_value.buffer);
+	}
+	_header.saveFiles.clear();
+	_mode = kClosed;
+}
+
+bool PlaybackFile::parseHeader() {
+	PlaybackFileHeader result;
+	ChunkHeader nextChunk;
+	_playbackParseState = kFileStateCheckFormat;
+	if (!readChunkHeader(nextChunk)) {
+		_playbackParseState = kFileStateError;
+		return false;
+	}
+	while ((_playbackParseState != kFileStateDone) && (_playbackParseState != kFileStateError)) {
+		if (processChunk(nextChunk)) {
+			if (!readChunkHeader(nextChunk)) {
+				warning("Error in header parsing");
+				_playbackParseState = kFileStateError;
+			}
+		}
+	}
+	return _playbackParseState == kFileStateDone;
+}
+
+bool PlaybackFile::checkPlaybackFileVersion() {
+	uint32 version;
+	version = _readStream->readUint32LE();
+	if (version != RECORD_VERSION) {
+		warning("Incorrect playback file version. Expected version %d, but got %d.", RECORD_VERSION, version);
+		return false;
+	}
+	return true;
+}
+
+
+String PlaybackFile::readString(int len) {
+	String result;
+	char buf[50];
+	int readSize = 49;
+	while (len > 0)	{
+		if (len <= 49) {
+			readSize = len;
+		}
+		_readStream->read(buf, readSize);
+		buf[readSize] = 0;
+		result += buf;
+		len -= readSize;
+	}
+	return result;
+}
+
+bool PlaybackFile::readChunkHeader(PlaybackFile::ChunkHeader &nextChunk) {
+	nextChunk.id = (FileTag)_readStream->readUint32LE();
+	nextChunk.len = _readStream->readUint32LE();
+	return !_readStream->err() && !_readStream->eos();
+}
+
+bool PlaybackFile::processChunk(ChunkHeader &nextChunk) {
+	switch (_playbackParseState) {
+	case kFileStateCheckFormat:
+		if (nextChunk.id == kFormatIdTag) {
+			_playbackParseState = kFileStateCheckVersion;
+		} else {
+			warning("Unknown playback file signature");
+			_playbackParseState = kFileStateError;
+		}
+		break;
+	case kFileStateCheckVersion:
+		if ((nextChunk.id == kVersionTag) && checkPlaybackFileVersion()) {
+			_playbackParseState = kFileStateSelectSection;
+		} else {
+			_playbackParseState = kFileStateError;
+		}
+		break;
+	case kFileStateSelectSection:
+		switch (nextChunk.id) {
+		case kHeaderSectionTag:
+			_playbackParseState = kFileStateProcessHeader;
+			break;
+		case kHashSectionTag:
+			_playbackParseState = kFileStateProcessHash;
+			break;
+		case kRandomSectionTag:
+			_playbackParseState = kFileStateProcessRandom;
+			break;
+		case kEventTag:
+		case kScreenShotTag:
+			_readStream->seek(-8, SEEK_CUR);
+			_playbackParseState = kFileStateDone;
+			return false;
+		case kSaveTag:
+			_playbackParseState = kFileStateProcessSave;
+			break;
+		case kSettingsSectionTag:
+			_playbackParseState = kFileStateProcessSettings;
+			warning("Loading record header");
+			break;
+		default:
+			_readStream->skip(nextChunk.len);
+			break;
+		}
+		break;
+	case kFileStateProcessSave:
+		if (nextChunk.id == kSaveRecordTag) {
+			readSaveRecord();
+		} else {
+			_playbackParseState = kFileStateSelectSection;
+			return false;
+		}
+		break;
+	case kFileStateProcessHeader:
+		switch (nextChunk.id) {
+		case kAuthorTag:
+			_header.author = readString(nextChunk.len);
+			break;
+		case kCommentsTag:
+			_header.notes = readString(nextChunk.len);
+			break;
+		case kNameTag:
+			_header.name = readString(nextChunk.len);
+			break;
+		default:
+			_playbackParseState = kFileStateSelectSection;
+			return false;
+		}
+		break;
+	case kFileStateProcessHash:
+		if (nextChunk.id == kHashRecordTag) {
+			readHashMap(nextChunk);
+		} else {
+			_playbackParseState = kFileStateSelectSection;
+			return false;
+		}
+		break;
+	case kFileStateProcessRandom:
+		if (nextChunk.id == kRandomRecordTag) {
+			processRndSeedRecord(nextChunk);
+		} else {
+			_playbackParseState = kFileStateSelectSection;
+			return false;
+		}
+		break;
+	case kFileStateProcessSettings:
+		if (nextChunk.id == kSettingsRecordTag) {
+			if (!processSettingsRecord()) {
+				_playbackParseState = kFileStateError;
+				return false;
+			}
+		} else {
+			_playbackParseState = kFileStateSelectSection;
+			return false;
+		}
+		break;
+	default:
+			return false;
+	}
+	return true;
+}
+
+void PlaybackFile::returnToChunkHeader() {
+	_readStream->seek(-8, SEEK_CUR);
+}
+
+void PlaybackFile::readHashMap(ChunkHeader chunk) {
+	String hashName = readString(chunk.len - 32);
+	String hashMd5 = readString(32);
+	_header.hashRecords[hashName] = hashMd5;
+}
+
+void PlaybackFile::processRndSeedRecord(ChunkHeader chunk) {
+	String randomSourceName = readString(chunk.len - 4);
+	uint32 randomSourceSeed = _readStream->readUint32LE();
+	_header.randomSourceRecords[randomSourceName] = randomSourceSeed;
+}
+
+bool PlaybackFile::processSettingsRecord() {
+	ChunkHeader keyChunk;
+	if (!readChunkHeader(keyChunk) || (keyChunk.id != kSettingsRecordKeyTag)) {
+		warning("Invalid format of settings section");
+		return false;
+	}
+	String key = readString(keyChunk.len);
+	ChunkHeader valueChunk;
+	if (!readChunkHeader(valueChunk) || (valueChunk.id != kSettingsRecordValueTag)) {
+		warning("Invalid format of settings section");
+		return false;
+	}
+	String value = readString(valueChunk.len);
+	_header.settingsRecords[key] = value;
+	return true;
+}
+
+
+bool PlaybackFile::readSaveRecord() {
+	ChunkHeader fileNameChunk;
+	if (!readChunkHeader(fileNameChunk) || (fileNameChunk.id != kSaveRecordNameTag)) {
+		warning("Invalid format of save section");
+		return false;
+	}
+	String fileName = readString(fileNameChunk.len);
+	ChunkHeader saveBufferChunk;
+	if (!readChunkHeader(saveBufferChunk) || (saveBufferChunk.id != kSaveRecordBufferTag)) {
+		warning("Invalid format of save section");
+		return false;
+	}
+	SaveFileBuffer buf;
+	buf.size = saveBufferChunk.len;
+	buf.buffer = (byte *)malloc(saveBufferChunk.len);
+	_readStream->read(buf.buffer, buf.size);
+	_header.saveFiles[fileName] = buf;
+	debugC(1, kDebugLevelEventRec, "playback:action=\"Load save file\" filename=%s len=%d", fileName.c_str(), buf.size);
+	return true;
+}
+
+
+
+RecorderEvent PlaybackFile::getNextEvent() {
+	assert(_mode == kRead);
+	if (isEventsBufferEmpty()) {
+		PlaybackFile::ChunkHeader header;
+		header.id = kFormatIdTag;
+		while (header.id != kEventTag) {
+			if (!readChunkHeader(header) || _readStream->eos()) {
+				break;
+			}
+			switch (header.id) {
+			case kEventTag:
+				readEventsToBuffer(header.len);
+				break;
+			case kScreenShotTag:
+				_readStream->seek(-4, SEEK_CUR);
+				header.len = _readStream->readUint32BE();
+				_readStream->skip(header.len-8);
+				break;
+			case kMD5Tag:
+				checkRecordedMD5();
+				break;
+			default:
+				_readStream->skip(header.len);
+				break;
+			}
+		}
+	}
+	RecorderEvent result;
+	readEvent(result);
+	return result;
+}
+
+bool PlaybackFile::isEventsBufferEmpty() {
+	return (uint32)_tmpPlaybackFile.pos() == _eventsSize;
+}
+
+void PlaybackFile::readEvent(RecorderEvent& event) {
+	event.recordedtype = (RecorderEventType)_tmpPlaybackFile.readByte();
+	switch (event.recordedtype) {
+	case kRecorderEventTypeTimer:
+		event.time = _tmpPlaybackFile.readUint32LE();
+		break;
+	case kRecorderEventTypeNormal:
+		event.type = (EventType)_tmpPlaybackFile.readUint32LE();
+		switch (event.type) {
+		case EVENT_KEYDOWN:
+		case EVENT_KEYUP:
+			event.time = _tmpPlaybackFile.readUint32LE();
+			event.kbd.keycode = (KeyCode)_tmpPlaybackFile.readSint32LE();
+			event.kbd.ascii = _tmpPlaybackFile.readUint16LE();
+			event.kbd.flags = _tmpPlaybackFile.readByte();
+			break;
+		case EVENT_MOUSEMOVE:
+		case EVENT_LBUTTONDOWN:
+		case EVENT_LBUTTONUP:
+		case EVENT_RBUTTONDOWN:
+		case EVENT_RBUTTONUP:
+		case EVENT_WHEELUP:
+		case EVENT_WHEELDOWN:
+		case EVENT_MBUTTONDOWN:
+		case EVENT_MBUTTONUP:
+			event.time = _tmpPlaybackFile.readUint32LE();
+			event.mouse.x = _tmpPlaybackFile.readSint16LE();
+			event.mouse.y = _tmpPlaybackFile.readSint16LE();
+			break;
+		default:
+			event.time = _tmpPlaybackFile.readUint32LE();
+			break;
+		}
+		break;
+	}
+	event.synthetic = true;
+}
+
+void PlaybackFile::readEventsToBuffer(uint32 size) {
+	_readStream->read(_tmpBuffer, size);
+	_tmpPlaybackFile.seek(0);
+	_eventsSize = size;
+}
+
+void PlaybackFile::saveScreenShot(Graphics::Surface &screen, byte md5[16]) {
+	dumpRecordsToFile();
+	_writeStream->writeUint32LE(kMD5Tag);
+	_writeStream->writeUint32LE(16);
+	_writeStream->write(md5, 16);
+	Graphics::saveThumbnail(*_writeStream, screen);
+}
+
+void PlaybackFile::dumpRecordsToFile() {
+	if (!_headerDumped) {
+		dumpHeaderToFile();
+		_headerDumped = true;
+	}
+	if (_recordCount == 0) {
+		return;
+	}
+	_writeStream->writeUint32LE(kEventTag);
+	_writeStream->writeUint32LE(_tmpRecordFile.pos());
+	_writeStream->write(_tmpBuffer, _tmpRecordFile.pos());
+	_tmpRecordFile.seek(0);
+	_recordCount = 0;
+}
+
+void PlaybackFile::dumpHeaderToFile() {
+	_writeStream->writeUint32LE(kFormatIdTag);
+	// Specify size for first tag as NULL since we cannot calculate
+	// size of the file at time of the header dumping
+	_writeStream->writeUint32LE(0);
+	_writeStream->writeUint32LE(kVersionTag);
+	_writeStream->writeUint32LE(4);
+	_writeStream->writeUint32LE(RECORD_VERSION);
+	writeHeaderSection();
+	writeGameHash();
+	writeRandomRecords();
+	writeGameSettings();
+	writeSaveFilesSection();
+}
+
+void PlaybackFile::writeHeaderSection() {
+	uint32 headerSize = 0;
+	if (!_header.author.empty()) {
+		headerSize = _header.author.size() + 8;
+	}
+	if (!_header.notes.empty()) {
+		headerSize += _header.notes.size() + 8;
+	}
+	if (!_header.name.empty()) {
+		headerSize += _header.name.size() + 8;
+	}
+	if (headerSize == 0) {
+		return;
+	}
+	_writeStream->writeUint32LE(kHeaderSectionTag);
+	_writeStream->writeUint32LE(headerSize);
+	if (!_header.author.empty()) {
+		_writeStream->writeUint32LE(kAuthorTag);
+		_writeStream->writeUint32LE(_header.author.size());
+		_writeStream->writeString(_header.author);
+	}
+	if (!_header.notes.empty()) {
+		_writeStream->writeUint32LE(kCommentsTag);
+		_writeStream->writeUint32LE(_header.notes.size());
+		_writeStream->writeString(_header.notes);
+	}
+	if (!_header.name.empty()) {
+		_writeStream->writeUint32LE(kNameTag);
+		_writeStream->writeUint32LE(_header.name.size());
+		_writeStream->writeString(_header.name);
+	}
+}
+
+void PlaybackFile::writeGameHash() {
+	uint32 hashSectionSize = 0;
+	for (StringMap::iterator i = _header.hashRecords.begin(); i != _header.hashRecords.end(); ++i) {
+		hashSectionSize = hashSectionSize + i->_key.size() + i->_value.size() + 8;
+	}
+	if (_header.hashRecords.size() == 0) {
+		return;
+	}
+	_writeStream->writeUint32LE(kHashSectionTag);
+	_writeStream->writeUint32LE(hashSectionSize);
+	for (StringMap::iterator i = _header.hashRecords.begin(); i != _header.hashRecords.end(); ++i) {
+		_writeStream->writeUint32LE(kHashRecordTag);
+		_writeStream->writeUint32LE(i->_key.size() + i->_value.size());
+		_writeStream->writeString(i->_key);
+		_writeStream->writeString(i->_value);
+	}
+}
+
+void PlaybackFile::writeRandomRecords() {
+	uint32 randomSectionSize = 0;
+	for (RandomSeedsDictionary::iterator i = _header.randomSourceRecords.begin(); i != _header.randomSourceRecords.end(); ++i) {
+		randomSectionSize = randomSectionSize + i->_key.size() + 12;
+	}
+	if (_header.randomSourceRecords.size() == 0) {
+		return;
+	}
+	_writeStream->writeUint32LE(kRandomSectionTag);
+	_writeStream->writeUint32LE(randomSectionSize);
+	for (RandomSeedsDictionary::iterator i = _header.randomSourceRecords.begin(); i != _header.randomSourceRecords.end(); ++i) {
+		_writeStream->writeUint32LE(kRandomRecordTag);
+		_writeStream->writeUint32LE(i->_key.size() + 4);
+		_writeStream->writeString(i->_key);
+		_writeStream->writeUint32LE(i->_value);
+	}
+}
+
+void PlaybackFile::writeEvent(const RecorderEvent &event) {
+	assert(_mode == kWrite);
+	_recordCount++;
+	_tmpRecordFile.writeByte(event.recordedtype);
+	switch (event.recordedtype) {
+	case kRecorderEventTypeTimer:
+		_tmpRecordFile.writeUint32LE(event.time);
+		break;
+	case kRecorderEventTypeNormal:
+		_tmpRecordFile.writeUint32LE((uint32)event.type);
+		switch(event.type) {
+		case EVENT_KEYDOWN:
+		case EVENT_KEYUP:
+			_tmpRecordFile.writeUint32LE(event.time);
+			_tmpRecordFile.writeSint32LE(event.kbd.keycode);
+			_tmpRecordFile.writeUint16LE(event.kbd.ascii);
+			_tmpRecordFile.writeByte(event.kbd.flags);
+			break;
+		case EVENT_MOUSEMOVE:
+		case EVENT_LBUTTONDOWN:
+		case EVENT_LBUTTONUP:
+		case EVENT_RBUTTONDOWN:
+		case EVENT_RBUTTONUP:
+		case EVENT_WHEELUP:
+		case EVENT_WHEELDOWN:
+		case EVENT_MBUTTONDOWN:
+		case EVENT_MBUTTONUP:
+			_tmpRecordFile.writeUint32LE(event.time);
+			_tmpRecordFile.writeSint16LE(event.mouse.x);
+			_tmpRecordFile.writeSint16LE(event.mouse.y);
+			break;
+		default:
+			_tmpRecordFile.writeUint32LE(event.time);
+			break;
+		}
+		break;
+	}
+	if (_recordCount == kMaxBufferedRecords) {
+		dumpRecordsToFile();
+	}
+}
+
+void PlaybackFile::writeGameSettings() {
+	_writeStream->writeUint32LE(kSettingsSectionTag);
+	uint32 settingsSectionSize = 0;
+	for (StringMap::iterator i = _header.settingsRecords.begin(); i != _header.settingsRecords.end(); ++i) {
+		settingsSectionSize += i->_key.size() + i->_value.size() + 24;
+	}
+	_writeStream->writeUint32LE(settingsSectionSize);
+	for (StringMap::iterator i = _header.settingsRecords.begin(); i != _header.settingsRecords.end(); ++i) {
+		_writeStream->writeUint32LE(kSettingsRecordTag);
+		_writeStream->writeUint32LE(i->_key.size() + i->_value.size() + 16);
+		_writeStream->writeUint32LE(kSettingsRecordKeyTag);
+		_writeStream->writeUint32LE(i->_key.size());
+		_writeStream->writeString(i->_key);
+		_writeStream->writeUint32LE(kSettingsRecordValueTag);
+		_writeStream->writeUint32LE(i->_value.size());
+		_writeStream->writeString(i->_value);
+	}
+}
+
+int PlaybackFile::getScreensCount() {
+	if (_mode != kRead) {
+		return 0;
+	}
+	_readStream->seek(0);
+	int result = 0;
+	while (skipToNextScreenshot()) {
+		uint32 size = _readStream->readUint32BE();
+		_readStream->skip(size-8);
+		++result;
+	}
+	return result;
+}
+
+bool PlaybackFile::skipToNextScreenshot() {
+	while (true) {
+		FileTag id = (FileTag)_readStream->readUint32LE();
+		if (_readStream->eos()) {
+			break;
+		}
+		if (id == kScreenShotTag) {
+			return true;
+		}
+		else {
+			uint32 size = _readStream->readUint32LE();
+			_readStream->skip(size);
+		}
+	}
+	return false;
+}
+
+Graphics::Surface *PlaybackFile::getScreenShot(int number) {
+	if (_mode != kRead) {
+		return NULL;
+	}
+	_readStream->seek(0);
+	int screenCount = 1;
+	while (skipToNextScreenshot()) {
+		if (screenCount == number) {
+			screenCount++;
+			_readStream->seek(-4, SEEK_CUR);
+			return Graphics::loadThumbnail(*_readStream);
+		} else {
+			uint32 size = _readStream->readUint32BE();
+			_readStream->skip(size-8);
+			screenCount++;
+		}
+	}
+	return NULL;
+}
+
+void PlaybackFile::updateHeader() {
+	if (_mode == kWrite) {
+		_readStream = g_system->getSavefileManager()->openForLoading(_header.fileName);
+	}
+	_readStream->seek(0);
+	skipHeader();
+	String tmpFilename = "_" + _header.fileName;
+	_writeStream = g_system->getSavefileManager()->openForSaving(tmpFilename);
+	dumpHeaderToFile();
+	uint32 readedSize = 0;
+	do {
+		readedSize = _readStream->read(_tmpBuffer, kRecordBuffSize);
+		_writeStream->write(_tmpBuffer, readedSize);
+	} while (readedSize != 0);
+	delete _writeStream;
+	_writeStream = NULL;
+	delete _readStream;
+	_readStream = NULL;
+	g_system->getSavefileManager()->removeSavefile(_header.fileName);
+	g_system->getSavefileManager()->renameSavefile(tmpFilename, _header.fileName);
+	if (_mode == kRead) {
+		openRead(_header.fileName);
+	}
+}
+
+void PlaybackFile::skipHeader() {
+	while (true) {
+		uint32 id = _readStream->readUint32LE();
+		if (_readStream->eos()) {
+			break;
+		}
+		if ((id == kScreenShotTag) || (id == kEventTag) || (id == kMD5Tag)) {
+			_readStream->seek(-4, SEEK_CUR);
+			return;
+		}
+		else {
+			uint32 size = _readStream->readUint32LE();
+			_readStream->skip(size);
+		}
+	}
+}
+
+void PlaybackFile::addSaveFile(const String &fileName, InSaveFile *saveStream) {
+	uint oldPos = saveStream->pos();
+	saveStream->seek(0);
+	_header.saveFiles[fileName].buffer = (byte *)malloc(saveStream->size());
+	_header.saveFiles[fileName].size = saveStream->size();
+	saveStream->read(_header.saveFiles[fileName].buffer, saveStream->size());
+	saveStream->seek(oldPos);
+}
+
+void PlaybackFile::writeSaveFilesSection() {
+	uint size = 0;
+	for (HashMap<String, SaveFileBuffer>::iterator  i = _header.saveFiles.begin(); i != _header.saveFiles.end(); ++i) {
+		size += i->_value.size + i->_key.size() + 24;
+	}
+	if (size == 0) {
+		return;
+	}
+	_writeStream->writeSint32LE(kSaveTag);
+	_writeStream->writeSint32LE(size);
+	for (HashMap<String, SaveFileBuffer>::iterator  i = _header.saveFiles.begin(); i != _header.saveFiles.end(); ++i) {
+		_writeStream->writeSint32LE(kSaveRecordTag);
+		_writeStream->writeSint32LE(i->_key.size() + i->_value.size + 16);
+		_writeStream->writeSint32LE(kSaveRecordNameTag);
+		_writeStream->writeSint32LE(i->_key.size());
+		_writeStream->writeString(i->_key);
+		_writeStream->writeSint32LE(kSaveRecordBufferTag);
+		_writeStream->writeSint32LE(i->_value.size);
+		_writeStream->write(i->_value.buffer, i->_value.size);
+	}
+}
+
+
+void PlaybackFile::checkRecordedMD5() {
+	uint8 currentMD5[16];
+	uint8 savedMD5[16];
+	Graphics::Surface screen;
+	_readStream->read(savedMD5, 16);
+	if (!g_eventRec.grabScreenAndComputeMD5(screen, currentMD5)) {
+		return;
+	}
+	uint32 seconds = g_system->getMillis(true) / 1000;
+	String screenTime = String::format("%.2d:%.2d:%.2d", seconds / 3600 % 24, seconds / 60 % 60, seconds % 60);
+	if (memcmp(savedMD5, currentMD5, 16) != 0) {
+		debugC(1, kDebugLevelEventRec, "playback:action=\"Check screenshot\" time=%s result = fail", screenTime.c_str());
+		warning("Recorded and current screenshots are different");
+	} else {
+		debugC(1, kDebugLevelEventRec, "playback:action=\"Check screenshot\" time=%s result = success", screenTime.c_str());
+	}
+	Graphics::saveThumbnail(*_screenshotsFile, screen);
+	screen.free();
+}
+
+
+}