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Diffstat (limited to 'graphics/video/codecs/truemotion1.cpp')
| -rw-r--r-- | graphics/video/codecs/truemotion1.cpp | 418 |
1 files changed, 0 insertions, 418 deletions
diff --git a/graphics/video/codecs/truemotion1.cpp b/graphics/video/codecs/truemotion1.cpp deleted file mode 100644 index 6ea766ffe1..0000000000 --- a/graphics/video/codecs/truemotion1.cpp +++ /dev/null @@ -1,418 +0,0 @@ -/* 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. - * - * $URL$ - * $Id$ - * - */ - -// Based on the TrueMotion 1 decoder by Alex Beregszaszi & Mike Melanson in FFmpeg - -#include "common/scummsys.h" -#include "graphics/video/codecs/truemotion1.h" - -#ifdef GRAPHICS_TRUEMOTION1_H - -#include "graphics/video/codecs/truemotion1data.h" -#include "common/stream.h" - -namespace Graphics { - -enum { - FLAG_SPRITE = (1 << 5), - FLAG_KEYFRAME = (1 << 4), - FLAG_INTERFRAME = (1 << 3), - FLAG_INTERPOLATED = (1 << 2) -}; - -enum { - ALGO_NOP = 0, - ALGO_RGB16V = 1, - ALGO_RGB16H = 2, - ALGO_RGB24H = 3 -}; - -// these are the various block sizes that can occupy a 4x4 block -enum { - BLOCK_2x2 = 0, - BLOCK_2x4 = 1, - BLOCK_4x2 = 2, - BLOCK_4x4 = 3 -}; - -// { valid for metatype }, algorithm, num of deltas, vert res, horiz res -struct { - int algorithm; - int blockWidth; // vres - int blockHeight; // hres - int blockType; -} static const compressionTypes[17] = { - { ALGO_NOP, 0, 0, 0 }, - - { ALGO_RGB16V, 4, 4, BLOCK_4x4 }, - { ALGO_RGB16H, 4, 4, BLOCK_4x4 }, - { ALGO_RGB16V, 4, 2, BLOCK_4x2 }, - { ALGO_RGB16H, 4, 2, BLOCK_4x2 }, - - { ALGO_RGB16V, 2, 4, BLOCK_2x4 }, - { ALGO_RGB16H, 2, 4, BLOCK_2x4 }, - { ALGO_RGB16V, 2, 2, BLOCK_2x2 }, - { ALGO_RGB16H, 2, 2, BLOCK_2x2 }, - - { ALGO_NOP, 4, 4, BLOCK_4x4 }, - { ALGO_RGB24H, 4, 4, BLOCK_4x4 }, - { ALGO_NOP, 4, 2, BLOCK_4x2 }, - { ALGO_RGB24H, 4, 2, BLOCK_4x2 }, - - { ALGO_NOP, 2, 4, BLOCK_2x4 }, - { ALGO_RGB24H, 2, 4, BLOCK_2x4 }, - { ALGO_NOP, 2, 2, BLOCK_2x2 }, - { ALGO_RGB24H, 2, 2, BLOCK_2x2 } -}; - -TrueMotion1Decoder::TrueMotion1Decoder(uint16 width, uint16 height) { - _surface = new Surface(); - _width = width; - _height = height; - - _surface->create(width, height, 2); - - // there is a vertical predictor for each pixel in a line; each vertical - // predictor is 0 to start with - _vertPred = new uint32[_width]; - - _buf = _mbChangeBits = _indexStream = 0; - _lastDeltaset = _lastVectable = -1; -} - -TrueMotion1Decoder::~TrueMotion1Decoder() { - _surface->free(); - delete _surface; - delete[] _vertPred; -} - -void TrueMotion1Decoder::selectDeltaTables(int deltaTableIndex) { - if (deltaTableIndex > 3) - return; - - for (byte i = 0; i < 8; i++) { - _ydt[i] = ydts[deltaTableIndex][i]; - _cdt[i] = cdts[deltaTableIndex][i]; - - // Y skinny deltas need to be halved for some reason; maybe the - // skinny Y deltas should be modified - // Drop the lsb before dividing by 2-- net effect: round down - // when dividing a negative number (e.g., -3/2 = -2, not -1) - _ydt[i] &= 0xFFFE; - _ydt[i] /= 2; - } -} - -int TrueMotion1Decoder::makeYdt16Entry(int p1, int p2) { -#ifdef SCUMM_BIG_ENDIAN - // Swap the values on BE systems. FFmpeg does this too. - SWAP<int>(p1, p2); -#endif - - int lo = _ydt[p1]; - lo += (lo << 6) + (lo << 11); - int hi = _ydt[p2]; - hi += (hi << 6) + (hi << 11); - return lo + (hi << 16); -} - -int TrueMotion1Decoder::makeCdt16Entry(int p1, int p2) { - int b = _cdt[p2]; - int r = _cdt[p1] << 11; - int lo = b + r; - return lo + (lo << 16); -} - -void TrueMotion1Decoder::genVectorTable16(const byte *selVectorTable) { - memset(&_yPredictorTable, 0, sizeof(PredictorTableEntry) * 1024); - memset(&_cPredictorTable, 0, sizeof(PredictorTableEntry) * 1024); - - for (int i = 0; i < 1024; i += 4) { - int len = *selVectorTable++ / 2; - for (int j = 0; j < len; j++) { - byte deltaPair = *selVectorTable++; - _yPredictorTable[i + j].color = makeYdt16Entry(deltaPair >> 4, deltaPair & 0xf); - _cPredictorTable[i + j].color = makeCdt16Entry(deltaPair >> 4, deltaPair & 0xf); - } - - _yPredictorTable[i + (len - 1)].getNextIndex = true; - _cPredictorTable[i + (len - 1)].getNextIndex = true; - } -} - -void TrueMotion1Decoder::decodeHeader(Common::SeekableReadStream *stream) { - _buf = new byte[stream->size()]; - stream->read(_buf, stream->size()); - - byte headerBuffer[128]; // logical maximum size of the header - const byte *selVectorTable; - - // There is 1 change bit per 4 pixels, so each change byte represents - // 32 pixels; divide width by 4 to obtain the number of change bits and - // then round up to the nearest byte. - _mbChangeBitsRowSize = ((_width >> 2) + 7) >> 3; - - _header.headerSize = ((_buf[0] >> 5) | (_buf[0] << 3)) & 0x7f; - - if (_buf[0] < 0x10) - error("Invalid TrueMotion1 header size %d", _header.headerSize); - - // unscramble the header bytes with a XOR operation - memset(headerBuffer, 0, 128); - for (int i = 1; i < _header.headerSize; i++) - headerBuffer[i - 1] = _buf[i] ^ _buf[i + 1]; - - _header.compression = headerBuffer[0]; - _header.deltaset = headerBuffer[1]; - _header.vectable = headerBuffer[2]; - _header.ysize = READ_LE_UINT16(&headerBuffer[3]); - _header.xsize = READ_LE_UINT16(&headerBuffer[5]); - _header.checksum = READ_LE_UINT16(&headerBuffer[7]); - _header.version = headerBuffer[9]; - _header.headerType = headerBuffer[10]; - _header.flags = headerBuffer[11]; - _header.control = headerBuffer[12]; - - // Version 2 - if (_header.version >= 2) { - if (_header.headerType > 3) { - error("Invalid header type %d", _header.headerType); - } else if (_header.headerType == 2 || _header.headerType == 3) { - _flags = _header.flags; - if (!(_flags & FLAG_INTERFRAME)) - _flags |= FLAG_KEYFRAME; - } else - _flags = FLAG_KEYFRAME; - } else // Version 1 - _flags = FLAG_KEYFRAME; - - if (_flags & FLAG_SPRITE) { - error("SPRITE frame found, please report the sample to the developers"); - } else if (_header.headerType < 2 && _header.xsize < 213 && _header.ysize >= 176) { - _flags |= FLAG_INTERPOLATED; - error("INTERPOLATION selected, please report the sample to the developers"); - } - - if (_header.compression >= 17) - error("Invalid TrueMotion1 compression type %d", _header.compression); - - if (_header.deltaset != _lastDeltaset || _header.vectable != _lastVectable) - selectDeltaTables(_header.deltaset); - - if ((_header.compression & 1) && _header.headerType) - selVectorTable = pc_tbl2; - else if (_header.vectable < 4) - selVectorTable = tables[_header.vectable - 1]; - else - error("Invalid vector table id %d", _header.vectable); - - if (_header.deltaset != _lastDeltaset || _header.vectable != _lastVectable) - genVectorTable16(selVectorTable); - - // set up pointers to the other key data chunks - _mbChangeBits = _buf + _header.headerSize; - - if (_flags & FLAG_KEYFRAME) { - // no change bits specified for a keyframe; only index bytes - _indexStream = _mbChangeBits; - } else { - // one change bit per 4x4 block - _indexStream = _mbChangeBits + _mbChangeBitsRowSize * (_height >> 2); - } - - _indexStreamSize = stream->size() - (_indexStream - _buf); - - _lastDeltaset = _header.deltaset; - _lastVectable = _header.vectable; - _blockWidth = compressionTypes[_header.compression].blockWidth; - _blockHeight = compressionTypes[_header.compression].blockHeight; - _blockType = compressionTypes[_header.compression].blockType; -} - -#define GET_NEXT_INDEX() \ -do { \ - if (indexStreamIndex >= _indexStreamSize) \ - error("TrueMotion1 decoder went out of bounds"); \ - index = _indexStream[indexStreamIndex++] * 4; \ -} while (0) \ - -#define APPLY_C_PREDICTOR() \ - predictor_pair = _cPredictorTable[index].color; \ - horizPred += predictor_pair; \ - if (_cPredictorTable[index].getNextIndex) { \ - GET_NEXT_INDEX(); \ - if (!index) { \ - GET_NEXT_INDEX(); \ - predictor_pair = _cPredictorTable[index].color; \ - horizPred += predictor_pair * 5; \ - if (_cPredictorTable[index].getNextIndex) \ - GET_NEXT_INDEX(); \ - else \ - index++; \ - } \ - } else \ - index++ - -#define APPLY_Y_PREDICTOR() \ - predictor_pair = _yPredictorTable[index].color; \ - horizPred += predictor_pair; \ - if (_yPredictorTable[index].getNextIndex) { \ - GET_NEXT_INDEX(); \ - if (!index) { \ - GET_NEXT_INDEX(); \ - predictor_pair = _yPredictorTable[index].color; \ - horizPred += predictor_pair * 5; \ - if (_yPredictorTable[index].getNextIndex) \ - GET_NEXT_INDEX(); \ - else \ - index++; \ - } \ - } else \ - index++ - -#define OUTPUT_PIXEL_PAIR() \ - *currentPixelPair = *vertPred + horizPred; \ - *vertPred++ = *currentPixelPair++ - -void TrueMotion1Decoder::decode16() { - uint32 predictor_pair; - bool keyframe = _flags & FLAG_KEYFRAME; - int indexStreamIndex = 0; - - // these variables are for managing the main index stream - int index; - - // clean out the line buffer - memset(_vertPred, 0, _width * 4); - - GET_NEXT_INDEX(); - - for (int y = 0; y < _height; y++) { - // re-init variables for the next line iteration - uint32 horizPred = 0; - uint32 *currentPixelPair = (uint32 *)_surface->getBasePtr(0, y); - uint32 *vertPred = _vertPred; - int mbChangeIndex = 0; - byte mbChangeByte = _mbChangeBits[mbChangeIndex++]; - byte mbChangeByteMask = 1; - - for (int pixelsLeft = _width; pixelsLeft > 0; pixelsLeft -= 4) { - if (keyframe || (mbChangeByte & mbChangeByteMask) == 0) { - switch (y & 3) { - case 0: - // if macroblock width is 2, apply C-Y-C-Y; else - // apply C-Y-Y - if (_blockWidth == 2) { - APPLY_C_PREDICTOR(); - APPLY_Y_PREDICTOR(); - OUTPUT_PIXEL_PAIR(); - APPLY_C_PREDICTOR(); - APPLY_Y_PREDICTOR(); - OUTPUT_PIXEL_PAIR(); - } else { - APPLY_C_PREDICTOR(); - APPLY_Y_PREDICTOR(); - OUTPUT_PIXEL_PAIR(); - APPLY_Y_PREDICTOR(); - OUTPUT_PIXEL_PAIR(); - } - break; - case 1: - case 3: - // always apply 2 Y predictors on these iterations - APPLY_Y_PREDICTOR(); - OUTPUT_PIXEL_PAIR(); - APPLY_Y_PREDICTOR(); - OUTPUT_PIXEL_PAIR(); - break; - case 2: - // this iteration might be C-Y-C-Y, Y-Y, or C-Y-Y - // depending on the macroblock type - if (_blockType == BLOCK_2x2) { - APPLY_C_PREDICTOR(); - APPLY_Y_PREDICTOR(); - OUTPUT_PIXEL_PAIR(); - APPLY_C_PREDICTOR(); - APPLY_Y_PREDICTOR(); - OUTPUT_PIXEL_PAIR(); - } else if (_blockType == BLOCK_4x2) { - APPLY_C_PREDICTOR(); - APPLY_Y_PREDICTOR(); - OUTPUT_PIXEL_PAIR(); - APPLY_Y_PREDICTOR(); - OUTPUT_PIXEL_PAIR(); - } else { - APPLY_Y_PREDICTOR(); - OUTPUT_PIXEL_PAIR(); - APPLY_Y_PREDICTOR(); - OUTPUT_PIXEL_PAIR(); - } - break; - } - } else { - // skip (copy) four pixels, but reassign the horizontal - // predictor - *vertPred++ = *currentPixelPair++; - horizPred = *currentPixelPair - *vertPred; - *vertPred++ = *currentPixelPair++; - } - - if (!keyframe) { - mbChangeByteMask <<= 1; - - // next byte - if (!mbChangeByteMask) { - mbChangeByte = _mbChangeBits[mbChangeIndex++]; - mbChangeByteMask = 1; - } - } - } - - // next change row - if (((y + 1) & 3) == 0) - _mbChangeBits += _mbChangeBitsRowSize; - } -} - -const Surface *TrueMotion1Decoder::decodeImage(Common::SeekableReadStream *stream) { - decodeHeader(stream); - - if (compressionTypes[_header.compression].algorithm == ALGO_NOP) - return 0; - - if (compressionTypes[_header.compression].algorithm == ALGO_RGB24H) { - warning("Unhandled TrueMotion1 24bpp frame"); - return 0; - } else - decode16(); - - delete[] _buf; - - return _surface; -} - -} // End of namespace Graphics - -#endif |