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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 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/scummsys.h"
#include "common/str.h"
#include "common/file.h"
#include "common/textconsole.h"
#include "common/debug.h"
#include "common/endian.h"
#include "zvision/rlf_animation.h"
namespace ZVision {
RlfAnimation::RlfAnimation(const Common::String &fileName)
: _frames(0) {
Common::File file;
if (!file.open(fileName)) {
warning("RLF animation file %s could not be opened", fileName.c_str());
return;
}
if (file.readUint32BE() != MKTAG('F', 'E', 'L', 'R')) {
warning("%s is not a RLF animation file. Wrong magic number", fileName.c_str());
return;
}
// Read the header
file.readUint32LE(); // Size1
file.readUint32LE(); // Unknown1
file.readUint32LE(); // Unknown2
_frameCount = file.readUint32LE(); // Frame count
// Since we don't need any of the data, we can just seek right to the
// entries we need rather than read in all the individual entries.
file.seek(136, SEEK_CUR);
//// Read CIN header
//file.readUint32BE(); // Magic number FNIC
//file.readUint32LE(); // Size2
//file.readUint32LE(); // Unknown3
//file.readUint32LE(); // Unknown4
//file.readUint32LE(); // Unknown5
//file.seek(0x18, SEEK_CUR); // VRLE
//file.readUint32LE(); // LRVD
//file.readUint32LE(); // Unknown6
//file.seek(0x18, SEEK_CUR); // HRLE
//file.readUint32LE(); // ELHD
//file.readUint32LE(); // Unknown7
//file.seek(0x18, SEEK_CUR); // HKEY
//file.readUint32LE(); // ELRH
//// Read MIN info header
//file.readUint32BE(); // Magic number FNIM
//file.readUint32LE(); // Size3
//file.readUint32LE(); // OEDV
//file.readUint32LE(); // Unknown8
//file.readUint32LE(); // Unknown9
//file.readUint32LE(); // Unknown10
_width = file.readUint32LE(); // Width
_height = file.readUint32LE(); // Height
// Read time header
file.readUint32BE(); // Magic number EMIT
file.readUint32LE(); // Size4
file.readUint32LE(); // Unknown11
_frameTime = file.readUint32LE() / 10; // Frame time in microseconds
// Read in each frame
_frames = new uint16 *[_frameCount];
for (uint i = 0; i < _frameCount; i++) {
file.readUint32BE(); // Magic number MARF
uint32 size = file.readUint32LE(); // Size
file.readUint32LE(); // Unknown1
file.readUint32LE(); // Unknown2
uint32 type = file.readUint32BE(); // Either ELHD or ELRH
uint32 headerSize = file.readUint32LE(); // Offset from the beginning of this frame to the frame data. Should always be 28
file.readUint32LE(); // Unknown3
int8 *buffer = new int8[size - headerSize];
file.read(buffer, size - headerSize);
_frames[i] = new uint16[_width * _height];
uint frameByteSize = _width * _height * sizeof(uint16);
memset(_frames[i], 0x7C00, frameByteSize);
// Decode the data
debug("Decoding frame %u", i);
if (type == MKTAG('E', 'L', 'H', 'D')) {
debug("Decoding with masked RLE");
decodeMaskedRunLengthEncoding(buffer, (int8 *)_frames[i], size - headerSize, frameByteSize);
} else if (type == MKTAG('E', 'L', 'R', 'H')) {
debug("Decoding with simple RLE");
decodeSimpleRunLengthEncoding(buffer, (int8 *)_frames[i], size - headerSize, frameByteSize);
} else {
warning("Frame %u of %s doesn't have type that can be decoded", i, fileName.c_str());
return;
}
// Cleanup
delete[] buffer;
}
};
RlfAnimation::~RlfAnimation() {
if (_frames != 0) {
delete[] _frames;
}
}
void RlfAnimation::decodeMaskedRunLengthEncoding(int8 *source, int8 *dest, uint32 sourceSize, uint32 destSize) const {
uint32 sourceOffset = 0;
uint32 destOffset = 0;
while (sourceOffset < sourceSize) {
int8 numberOfSamples = source[sourceOffset];
sourceOffset++;
// If numberOfSamples is negative, the next abs(numberOfSamples) samples should
// be copied directly from source to dest
if (numberOfSamples < 0) {
numberOfSamples = abs(numberOfSamples);
while (numberOfSamples > 0) {
if (sourceOffset + 1 >= sourceSize) {
return;
} else if (destOffset + 1 >= destSize) {
warning("Frame decoding overflow\n\tsourceOffset=%u\tsourceSize=%u\n\tdestOffset=%u\tdestSize=%u", sourceOffset, sourceSize, destOffset, destSize);
return;
}
WRITE_UINT16(dest + destOffset, READ_LE_UINT16(source + sourceOffset));
sourceOffset += 2;
destOffset += 2;
numberOfSamples--;
}
// If numberOfSamples is >= 0, move destOffset forward ((numberOfSamples * 2) + 2)
// This function assumes the dest buffer has been memset with 0's.
} else {
if (sourceOffset + 1 >= sourceSize) {
return;
} else if (destOffset + 1 >= destSize) {
warning("Frame decoding overflow\n\tsourceOffset=%u\tsourceSize=%u\n\tdestOffset=%u\tdestSize=%u", sourceOffset, sourceSize, destOffset, destSize);
return;
}
destOffset += (numberOfSamples * 2) + 2;
}
}
}
void RlfAnimation::decodeSimpleRunLengthEncoding(int8 *source, int8 *dest, uint32 sourceSize, uint32 destSize) const {
uint32 sourceOffset = 0;
uint32 destOffset = 0;
while (sourceOffset < sourceSize) {
int8 numberOfSamples = source[sourceOffset];
sourceOffset++;
// If numberOfSamples is negative, the next abs(numberOfSamples) samples should
// be copied directly from source to dest
if (numberOfSamples < 0) {
numberOfSamples = abs(numberOfSamples);
while (numberOfSamples > 0) {
if (sourceOffset + 1 >= sourceSize) {
return;
} else if (destOffset + 1 >= destSize) {
warning("Frame decoding overflow\n\tsourceOffset=%u\tsourceSize=%u\n\tdestOffset=%u\tdestSize=%u", sourceOffset, sourceSize, destOffset, destSize);
return;
}
WRITE_UINT16(dest + destOffset, READ_LE_UINT16(source + sourceOffset));
sourceOffset += 2;
destOffset += 2;
numberOfSamples--;
}
// If numberOfSamples is >= 0, copy one sample from source to the
// next (numberOfSamples + 2) dest spots
} else {
if (sourceOffset + 1 >= sourceSize) {
return;
}
uint16 sampleColor = READ_LE_UINT16(source + sourceOffset);
sourceOffset += 2;
numberOfSamples += 2;
while (numberOfSamples > 0) {
if (destOffset + 1 >= destSize) {
warning("Frame decoding overflow\n\tsourceOffset=%u\tsourceSize=%u\n\tdestOffset=%u\tdestSize=%u", sourceOffset, sourceSize, destOffset, destSize);
return;
}
WRITE_UINT16(dest + destOffset, sampleColor);
destOffset += 2;
numberOfSamples--;
}
}
}
}
} // End of namespace ZVision
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