From b7f8990ba81f81db3243ae3f9069c4d9f12754aa Mon Sep 17 00:00:00 2001
From: Filippos Karapetis
Date: Thu, 21 May 2009 13:02:56 +0000
Subject: Renamed the DXA, SMK and FLIC video decoders to reflect the fact that
 they're decoders, not players

svn-id: r40759
---
 graphics/video/dxa_decoder.cpp | 563 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 563 insertions(+)
 create mode 100644 graphics/video/dxa_decoder.cpp

(limited to 'graphics/video/dxa_decoder.cpp')

diff --git a/graphics/video/dxa_decoder.cpp b/graphics/video/dxa_decoder.cpp
new file mode 100644
index 0000000000..e514050942
--- /dev/null
+++ b/graphics/video/dxa_decoder.cpp
@@ -0,0 +1,563 @@
+/* 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.
+ *
+ * $URL$
+ * $Id$
+ *
+ */
+
+#include "common/debug.h"
+#include "common/endian.h"
+#include "common/archive.h"
+#include "common/system.h"
+#include "common/util.h"
+
+#include "graphics/video/dxa_decoder.h"
+
+#ifdef USE_ZLIB
+  #include "common/zlib.h"
+#endif
+
+namespace Graphics {
+
+DXADecoder::DXADecoder() {
+	_fileStream = 0;
+
+	_frameBuffer1 = 0;
+	_frameBuffer2 = 0;
+	_scaledBuffer = 0;
+	_videoFrameBuffer = 0;
+
+	_inBuffer = 0;
+	_inBufferSize = 0;
+
+	_decompBuffer = 0;
+	_decompBufferSize = 0;
+
+	_videoInfo.width = 0;
+	_videoInfo.height = 0;
+
+	_frameSize = 0;
+	_videoInfo.frameCount = 0;
+	_videoInfo.currentFrame = 0;
+	_videoInfo.frameRate = 0;
+	_videoInfo.frameDelay = 0;
+
+	_scaleMode = S_NONE;
+}
+
+DXADecoder::~DXADecoder() {
+	closeFile();
+}
+
+bool DXADecoder::loadFile(const char *fileName) {
+	uint32 tag;
+	int32 frameRate;
+
+	closeFile();
+
+	_fileStream = SearchMan.createReadStreamForMember(fileName);
+	if (!_fileStream)
+		return false;
+
+	tag = _fileStream->readUint32BE();
+	assert(tag == MKID_BE('DEXA'));
+
+	uint8 flags = _fileStream->readByte();
+	_videoInfo.frameCount = _fileStream->readUint16BE();
+	frameRate = _fileStream->readSint32BE();
+
+	if (frameRate > 0) {
+		_videoInfo.frameRate = 1000 / frameRate;
+		_videoInfo.frameDelay = frameRate * 100;
+	} else if (frameRate < 0) {
+		_videoInfo.frameRate = 100000 / (-frameRate);
+		_videoInfo.frameDelay = -frameRate;
+	} else {
+		_videoInfo.frameRate = 10;
+		_videoInfo.frameDelay = 10000;
+	}
+
+	_videoInfo.width = _fileStream->readUint16BE();
+	_videoInfo.height = _fileStream->readUint16BE();
+
+	if (flags & 0x80) {
+		_scaleMode = S_INTERLACED;
+		_curHeight = _videoInfo.height / 2;
+	} else if (flags & 0x40) {
+		_scaleMode = S_DOUBLE;
+		_curHeight = _videoInfo.height / 2;
+	} else {
+		_scaleMode = S_NONE;
+		_curHeight = _videoInfo.height;
+	}
+
+	debug(2, "flags 0x0%x framesCount %d width %d height %d rate %d ticks %d", flags, getFrameCount(), getWidth(), getHeight(), getFrameRate(), getFrameDelay());
+
+	_frameSize = _videoInfo.width * _videoInfo.height;
+	_decompBufferSize = _frameSize;
+	_frameBuffer1 = (uint8 *)malloc(_frameSize);
+	memset(_frameBuffer1, 0, _frameSize);
+	_frameBuffer2 = (uint8 *)malloc(_frameSize);
+	memset(_frameBuffer2, 0, _frameSize);
+	if (!_frameBuffer1 || !_frameBuffer2)
+		error("DXADecoder: Error allocating frame buffers (size %u)", _frameSize);
+
+	_scaledBuffer = 0;
+	if (_scaleMode != S_NONE) {
+		_scaledBuffer = (uint8 *)malloc(_frameSize);
+		memset(_scaledBuffer, 0, _frameSize);
+		if (!_scaledBuffer)
+			error("Error allocating scale buffer (size %u)", _frameSize);
+	}
+
+#ifdef DXA_EXPERIMENT_MAXD
+	// Check for an extended header
+	if (flags & 1) {
+		uint32 size;
+
+		do {
+			tag = _fileStream->readUint32BE();
+			if (tag != 0) {
+				size = _fileStream->readUint32BE();
+			}
+			switch (tag) {
+				case 0: // No more tags
+					break;
+				case MKID_BE('MAXD'):
+					assert(size == 4);
+					_decompBufferSize = _fileStream->readUint32BE();
+					break;
+				default: // Unknown tag - skip it.
+					while (size > 0) {
+						byte dummy = _fileStream->readByte();
+						size--;
+					}
+					break;
+			}
+		} while (tag != 0);
+	}
+#endif
+	
+	// Read the sound header
+	_soundTag = _fileStream->readUint32BE();
+
+	_videoInfo.currentFrame = 0;
+
+	_videoInfo.firstframeOffset = _fileStream->pos();
+
+	return true;
+}
+
+void DXADecoder::closeFile() {
+	if (!_fileStream)
+		return;
+
+	delete _fileStream;
+	_fileStream = 0;
+
+	free(_frameBuffer1);
+	free(_frameBuffer2);
+	free(_scaledBuffer);
+	free(_inBuffer);
+	free(_decompBuffer);
+
+	_inBuffer = 0;
+	_decompBuffer = 0;
+}
+
+void DXADecoder::decodeZlib(byte *data, int size, int totalSize) {
+#ifdef USE_ZLIB
+	unsigned long dstLen = totalSize;
+	Common::uncompress(data, &dstLen, _inBuffer, size);
+#endif
+}
+
+#define BLOCKW 4
+#define BLOCKH 4
+
+void DXADecoder::decode12(int size) {
+#ifdef USE_ZLIB
+	if (_decompBuffer == NULL) {
+		_decompBuffer = (byte *)malloc(_decompBufferSize);
+		memset(_decompBuffer, 0, _decompBufferSize);
+		if (_decompBuffer == NULL)
+			error("Error allocating decomp buffer (size %u)", _decompBufferSize);
+	}
+	/* decompress the input data */
+	decodeZlib(_decompBuffer, size, _decompBufferSize);
+
+	byte *dat = _decompBuffer;
+
+	memcpy(_frameBuffer2, _frameBuffer1, _frameSize);
+
+	for (uint32 by = 0; by < _videoInfo.height; by += BLOCKH) {
+		for (uint32 bx = 0; bx < _videoInfo.width; bx += BLOCKW) {
+			byte type = *dat++;
+			byte *b2 = _frameBuffer1 + bx + by * _videoInfo.width;
+
+			switch (type) {
+			case 0:
+				break;
+			case 10:
+			case 11:
+			case 12:
+			case 13:
+			case 14:
+			case 15:
+			case 1:	{
+				unsigned short diffMap;
+				if (type >= 10 && type <= 15) {
+					static const struct { uint8 sh1, sh2; } shiftTbl[6] = {
+						{0, 0},	{8, 0},	{8, 8},	{8, 4},	{4, 0},	{4, 4}
+					};
+					diffMap = ((*dat & 0xF0) << shiftTbl[type-10].sh1) |
+						  ((*dat & 0x0F) << shiftTbl[type-10].sh2);
+					dat++;
+				} else {
+					diffMap = *(unsigned short*)dat;
+					dat += 2;
+				}
+
+				for (int yc = 0; yc < BLOCKH; yc++) {
+					for (int xc = 0; xc < BLOCKW; xc++) {
+						if (diffMap & 0x8000) {
+							b2[xc] = *dat++;
+						}
+						diffMap <<= 1;
+					}
+					b2 += _videoInfo.width;
+				}
+				break;
+			}
+			case 2:	{
+				byte color = *dat++;
+
+				for (int yc = 0; yc < BLOCKH; yc++) {
+					for (int xc = 0; xc < BLOCKW; xc++) {
+						b2[xc] = color;
+					}
+					b2 += _videoInfo.width;
+				}
+				break;
+			}
+			case 3:	{
+				for (int yc = 0; yc < BLOCKH; yc++) {
+					for (int xc = 0; xc < BLOCKW; xc++) {
+						b2[xc] = *dat++;
+					}
+					b2 += _videoInfo.width;
+				}
+				break;
+			}
+			case 4:	{
+				byte mbyte = *dat++;
+				int mx = (mbyte >> 4) & 0x07;
+				if (mbyte & 0x80)
+					mx = -mx;
+				int my = mbyte & 0x07;
+				if (mbyte & 0x08)
+					my = -my;
+				byte *b1 = _frameBuffer2 + (bx+mx) + (by+my) * _videoInfo.width;
+				for (int yc = 0; yc < BLOCKH; yc++) {
+					memcpy(b2, b1, BLOCKW);
+					b1 += _videoInfo.width;
+					b2 += _videoInfo.width;
+				}
+				break;
+			}
+			case 5:
+				break;
+			default:
+				error("decode12: Unknown type %d", type);
+			}
+		}
+	}
+#endif
+}
+
+void DXADecoder::decode13(int size) {
+#ifdef USE_ZLIB
+	uint8 *codeBuf, *dataBuf, *motBuf, *maskBuf;
+
+	if (_decompBuffer == NULL) {
+		_decompBuffer = (byte *)malloc(_decompBufferSize);
+		memset(_decompBuffer, 0, _decompBufferSize);
+		if (_decompBuffer == NULL)
+			error("Error allocating decomp buffer (size %u)", _decompBufferSize);
+	}
+
+	/* decompress the input data */
+	decodeZlib(_decompBuffer, size, _decompBufferSize);
+
+	memcpy(_frameBuffer2, _frameBuffer1, _frameSize);
+
+	int codeSize = _videoInfo.width * _curHeight / 16;
+	int dataSize, motSize, maskSize;
+
+	dataSize = READ_BE_UINT32(&_decompBuffer[0]);
+	motSize  = READ_BE_UINT32(&_decompBuffer[4]);
+	maskSize = READ_BE_UINT32(&_decompBuffer[8]);
+
+	codeBuf = &_decompBuffer[12];
+	dataBuf = &codeBuf[codeSize];
+	motBuf = &dataBuf[dataSize];
+	maskBuf = &motBuf[motSize];
+
+	for (uint32 by = 0; by < _curHeight; by += BLOCKH) {
+		for (uint32 bx = 0; bx < _videoInfo.width; bx += BLOCKW) {
+			uint8 type = *codeBuf++;
+			uint8 *b2 = (uint8*)_frameBuffer1 + bx + by * _videoInfo.width;
+
+			switch (type) {
+			case 0:
+				break;
+
+			case 1: {
+				uint16 diffMap = READ_BE_UINT16(maskBuf);
+				maskBuf += 2;
+
+				for (int yc = 0; yc < BLOCKH; yc++) {
+					for (int xc = 0; xc < BLOCKW; xc++) {
+						if (diffMap & 0x8000) {
+							b2[xc] = *dataBuf++;
+						}
+						diffMap <<= 1;
+					}
+					b2 += _videoInfo.width;
+				}
+				break;
+			}
+			case 2: {
+				uint8 color = *dataBuf++;
+
+				for (int yc = 0; yc < BLOCKH; yc++) {
+					for (int xc = 0; xc < BLOCKW; xc++) {
+						b2[xc] = color;
+					}
+					b2 += _videoInfo.width;
+				}
+				break;
+			}
+			case 3: {
+				for (int yc = 0; yc < BLOCKH; yc++) {
+					for (int xc = 0; xc < BLOCKW; xc++) {
+						b2[xc] = *dataBuf++;
+					}
+					b2 += _videoInfo.width;
+				}
+				break;
+			}
+			case 4: {
+				uint8 mbyte = *motBuf++;
+
+				int mx = (mbyte >> 4) & 0x07;
+				if (mbyte & 0x80)
+					mx = -mx;
+				int my = mbyte & 0x07;
+				if (mbyte & 0x08)
+					my = -my;
+
+				uint8 *b1 = (uint8*)_frameBuffer2 + (bx+mx) + (by+my) * _videoInfo.width;
+				for (int yc = 0; yc < BLOCKH; yc++) {
+					memcpy(b2, b1, BLOCKW);
+					b1 += _videoInfo.width;
+					b2 += _videoInfo.width;
+				}
+				break;
+			}
+			case 8: {
+				static const int subX[4] = {0, 2, 0, 2};
+				static const int subY[4] = {0, 0, 2, 2};
+
+				uint8 subMask = *maskBuf++;
+
+				for (int subBlock = 0; subBlock < 4; subBlock++) {
+					int sx = bx + subX[subBlock], sy = by + subY[subBlock];
+					b2 = (uint8*)_frameBuffer1 + sx + sy * _videoInfo.width;
+					switch (subMask & 0xC0) {
+					// 00: skip
+					case 0x00:
+						break;
+					// 01: solid color
+					case 0x40: {
+						uint8 subColor = *dataBuf++;
+						for (int yc = 0; yc < BLOCKH / 2; yc++) {
+							for (int xc = 0; xc < BLOCKW / 2; xc++) {
+								b2[xc] = subColor;
+							}
+							b2 += _videoInfo.width;
+						}
+						break;
+					}
+					// 02: motion vector
+					case 0x80: {
+						uint8 mbyte = *motBuf++;
+
+						int mx = (mbyte >> 4) & 0x07;
+						if (mbyte & 0x80)
+							mx = -mx;
+
+						int my = mbyte & 0x07;
+						if (mbyte & 0x08)
+							my = -my;
+
+						uint8 *b1 = (uint8*)_frameBuffer2 + (sx+mx) + (sy+my) * _videoInfo.width;
+						for (int yc = 0; yc < BLOCKH / 2; yc++) {
+							memcpy(b2, b1, BLOCKW / 2);
+							b1 += _videoInfo.width;
+							b2 += _videoInfo.width;
+						}
+						break;
+					}
+					// 03: raw
+					case 0xC0:
+						for (int yc = 0; yc < BLOCKH / 2; yc++) {
+							for (int xc = 0; xc < BLOCKW / 2; xc++) {
+								b2[xc] = *dataBuf++;
+							}
+							b2 += _videoInfo.width;
+						}
+						break;
+					}
+					subMask <<= 2;
+				}
+				break;
+			}
+			case 32:
+			case 33:
+			case 34: {
+				int count = type - 30;
+				uint8 pixels[4];
+
+				memcpy(pixels, dataBuf, count);
+				dataBuf += count;
+
+				if (count == 2) {
+					uint16 code = READ_BE_UINT16(maskBuf);
+					maskBuf += 2;
+					for (int yc = 0; yc < BLOCKH; yc++) {
+						for (int xc = 0; xc < BLOCKW; xc++) {
+							b2[xc] = pixels[code & 1];
+							code >>= 1;
+						}
+						b2 += _videoInfo.width;
+					}
+				} else {
+					uint32 code = READ_BE_UINT32(maskBuf);
+					maskBuf += 4;
+					for (int yc = 0; yc < BLOCKH; yc++) {
+						for (int xc = 0; xc < BLOCKW; xc++) {
+							b2[xc] = pixels[code & 3];
+							code >>= 2;
+						}
+						b2 += _videoInfo.width;
+					}
+				}
+				break;
+			}
+			default:
+				error("decode13: Unknown type %d", type);
+			}
+		}
+	}
+#endif
+}
+
+bool DXADecoder::decodeNextFrame() {
+	uint32 tag;
+
+	if (_videoInfo.currentFrame == 0)
+		_videoInfo.startTime = g_system->getMillis();
+
+	tag = _fileStream->readUint32BE();
+	if (tag == MKID_BE('CMAP')) {
+		byte rgb[768];
+
+		_fileStream->read(rgb, ARRAYSIZE(rgb));
+		setPalette(rgb);
+	}
+
+	tag = _fileStream->readUint32BE();
+	if (tag == MKID_BE('FRAM')) {
+		byte type = _fileStream->readByte();
+		uint32 size = _fileStream->readUint32BE();
+		if ((_inBuffer == NULL) || (_inBufferSize < size)) {
+			free(_inBuffer);
+			_inBuffer = (byte *)malloc(size);
+			memset(_inBuffer, 0, size);
+			if (_inBuffer == NULL)
+				error("Error allocating input buffer (size %u)", size);
+			_inBufferSize = size;
+		}
+
+		_fileStream->read(_inBuffer, size);
+
+		switch (type) {
+		case 2:
+			decodeZlib(_frameBuffer1, size, _frameSize);
+			break;
+		case 3:
+			decodeZlib(_frameBuffer2, size, _frameSize);
+			break;
+		case 12:
+			decode12(size);
+			break;
+		case 13:
+			decode13(size);
+			break;
+		default:
+			error("decodeFrame: Unknown compression type %d", type);
+		}
+
+		if (type == 3) {
+			for (uint32 j = 0; j < _curHeight; ++j) {
+				for (uint32 i = 0; i < _videoInfo.width; ++i) {
+					const int offs = j * _videoInfo.width + i;
+					_frameBuffer1[offs] ^= _frameBuffer2[offs];
+				}
+			}
+		}
+	}
+
+	switch (_scaleMode) {
+	case S_INTERLACED:
+		for (int cy = 0; cy < _curHeight; cy++) {
+			memcpy(&_scaledBuffer[2 * cy * _videoInfo.width], &_frameBuffer1[cy * _videoInfo.width], _videoInfo.width);
+			memset(&_scaledBuffer[((2 * cy) + 1) * _videoInfo.width], 0, _videoInfo.width);
+		}
+		_videoFrameBuffer = _scaledBuffer;
+		break;
+	case S_DOUBLE:
+		for (int cy = 0; cy < _curHeight; cy++) {
+			memcpy(&_scaledBuffer[2 * cy * _videoInfo.width], &_frameBuffer1[cy * _videoInfo.width], _videoInfo.width);
+			memcpy(&_scaledBuffer[((2 * cy) + 1) * _videoInfo.width], &_frameBuffer1[cy * _videoInfo.width], _videoInfo.width);
+		}
+		_videoFrameBuffer = _scaledBuffer;
+		break;
+	case S_NONE:
+		_videoFrameBuffer = _frameBuffer1;
+		break;
+	}
+
+	return ++_videoInfo.currentFrame < _videoInfo.frameCount;
+}
+
+} // End of namespace Graphics
-- 
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