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scummvm/image/codecs/indeo4.cpp
Eugene Sandulenko abea37c9bb
ALL: Update ScummVM project license to GPLv3+
2021-12-26 18:48:43 +01:00

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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/>.
*
*/
/* Intel Indeo 4 decompressor, derived from ffmpeg.
*
* Original copyright note: * Intel Indeo 4 (IV41, IV42, etc.) video decoder for ffmpeg
* written, produced, and directed by Alan Smithee
*/
#include "common/algorithm.h"
#include "common/debug.h"
#include "common/memstream.h"
#include "common/rect.h"
#include "common/textconsole.h"
#include "graphics/yuv_to_rgb.h"
#include "image/codecs/indeo4.h"
#include "image/codecs/indeo/indeo_dsp.h"
#include "image/codecs/indeo/mem.h"
namespace Image {
#define IVI4_PIC_SIZE_ESC 7
Indeo4Decoder::Indeo4Decoder(uint16 width, uint16 height, uint bitsPerPixel) :
IndeoDecoderBase(width, height, bitsPerPixel) {
_ctx._isIndeo4 = true;
_ctx._refBuf = 1;
_ctx._bRefBuf = 3;
_ctx._pFrame = new AVFrame();
}
bool Indeo4Decoder::isIndeo4(Common::SeekableReadStream &stream) {
// Less than 16 bytes? This can't be right
if (stream.size() < 16)
return false;
// Read in the start of the data
byte buffer[16];
stream.read(buffer, 16);
stream.seek(-16, SEEK_CUR);
// Validate the first 18-bit word has the correct identifier
Indeo::GetBits gb(buffer, 16 * 8);
bool isIndeo4 = gb.getBits(18) == 0x3FFF8;
return isIndeo4;
}
const Graphics::Surface *Indeo4Decoder::decodeFrame(Common::SeekableReadStream &stream) {
// Not Indeo 4? Fail
if (!isIndeo4(stream))
return nullptr;
// Set up the frame data buffer
byte *frameData = new byte[stream.size()];
stream.read(frameData, stream.size());
_ctx._frameData = frameData;
_ctx._frameSize = stream.size();
// Set up the GetBits instance for reading the data
_ctx._gb = new GetBits(_ctx._frameData, _ctx._frameSize);
// Decode the frame
int err = decodeIndeoFrame();
// Free the bit reader and frame buffer
delete _ctx._gb;
_ctx._gb = nullptr;
delete[] frameData;
_ctx._frameData = nullptr;
_ctx._frameSize = 0;
return (err < 0) ? nullptr : &_surface;
}
int Indeo4Decoder::decodePictureHeader() {
int pic_size_indx, i, p;
IVIPicConfig picConf;
if (_ctx._gb->getBits(18) != 0x3FFF8) {
warning("Invalid picture start code!");
return -1;
}
_ctx._prevFrameType = _ctx._frameType;
_ctx._frameType = _ctx._gb->getBits(3);
if (_ctx._frameType == 7) {
warning("Invalid frame type: %d", _ctx._frameType);
return -1;
}
if (_ctx._frameType == IVI4_FRAMETYPE_BIDIR)
_ctx._hasBFrames = true;
_ctx._hasTransp = _ctx._gb->getBit();
if (_ctx._hasTransp && _surface.format.aBits() == 0) {
// Surface is 4 bytes per pixel, but only RGB. So promote the
// surface to full RGBA, and convert all the existing pixels
_pixelFormat = Graphics::PixelFormat(4, 8, 8, 8, 8, 24, 16, 8, 0);
_surface.convertToInPlace(_pixelFormat);
}
// unknown bit: Mac decoder ignores this bit, XANIM returns error
if (_ctx._gb->getBit()) {
warning("Sync bit is set!");
return -1;
}
_ctx._dataSize = _ctx._gb->getBit() ? _ctx._gb->getBits(24) : 0;
// null frames don't contain anything else so we just return
if (_ctx._frameType >= IVI4_FRAMETYPE_NULL_FIRST) {
warning("Null frame encountered!");
return 0;
}
// Check key lock status. If enabled - ignore lock word.
// Usually we have to prompt the user for the password, but
// we don't do that because Indeo 4 videos can be decoded anyway
if (_ctx._gb->getBit()) {
_ctx._gb->skip(32);
warning("Password-protected clip!");
}
pic_size_indx = _ctx._gb->getBits(3);
if (pic_size_indx == IVI4_PIC_SIZE_ESC) {
picConf._picHeight = _ctx._gb->getBits(16);
picConf._picWidth = _ctx._gb->getBits(16);
} else {
picConf._picHeight = _ivi4_common_pic_sizes[pic_size_indx * 2 + 1];
picConf._picWidth = _ivi4_common_pic_sizes[pic_size_indx * 2];
}
// Decode tile dimensions.
_ctx._usesTiling = _ctx._gb->getBit();
if (_ctx._usesTiling) {
picConf._tileHeight = scaleTileSize(picConf._picHeight, _ctx._gb->getBits(4));
picConf._tileWidth = scaleTileSize(picConf._picWidth, _ctx._gb->getBits(4));
} else {
picConf._tileHeight = picConf._picHeight;
picConf._tileWidth = picConf._picWidth;
}
// Decode chroma subsampling. We support only 4:4 aka YVU9.
if (_ctx._gb->getBits(2)) {
warning("Only YVU9 picture format is supported!");
return -1;
}
picConf._chromaHeight = (picConf._picHeight + 3) >> 2;
picConf._chromaWidth = (picConf._picWidth + 3) >> 2;
// decode subdivision of the planes
picConf._lumaBands = decodePlaneSubdivision();
picConf._chromaBands = 0;
if (picConf._lumaBands)
picConf._chromaBands = decodePlaneSubdivision();
_ctx._isScalable = picConf._lumaBands != 1 || picConf._chromaBands != 1;
if (_ctx._isScalable && (picConf._lumaBands != 4 || picConf._chromaBands != 1)) {
warning("Scalability: unsupported subdivision! Luma bands: %d, chroma bands: %d",
picConf._lumaBands, picConf._chromaBands);
return -1;
}
// check if picture layout was changed and reallocate buffers
if (picConf.ivi_pic_config_cmp(_ctx._picConf)) {
if (IVIPlaneDesc::initPlanes(_ctx._planes, &picConf, 1)) {
warning("Couldn't reallocate color planes!");
_ctx._picConf._lumaBands = 0;
return -2;
}
_ctx._picConf = picConf;
// set default macroblock/block dimensions
for (p = 0; p <= 2; p++) {
for (i = 0; i < (!p ? picConf._lumaBands : picConf._chromaBands); i++) {
_ctx._planes[p]._bands[i]._mbSize = !p ? (!_ctx._isScalable ? 16 : 8) : 4;
_ctx._planes[p]._bands[i]._blkSize = !p ? 8 : 4;
}
}
if (IVIPlaneDesc::initTiles(_ctx._planes, _ctx._picConf._tileWidth,
_ctx._picConf._tileHeight)) {
warning("Couldn't reallocate internal structures!");
return -2;
}
}
_ctx._frameNum = _ctx._gb->getBit() ? _ctx._gb->getBits(20) : 0;
// skip decTimeEst field if present
if (_ctx._gb->getBit())
_ctx._gb->skip(8);
// decode macroblock and block huffman codebooks
if (_ctx._mbVlc.decodeHuffDesc(&_ctx, _ctx._gb->getBit(), IVI_MB_HUFF) ||
_ctx._blkVlc.decodeHuffDesc(&_ctx, _ctx._gb->getBit(), IVI_BLK_HUFF))
return -1;
_ctx._rvmapSel = _ctx._gb->getBit() ? _ctx._gb->getBits(3) : 8;
_ctx._inImf = _ctx._gb->getBit();
_ctx._inQ = _ctx._gb->getBit();
_ctx._picGlobQuant = _ctx._gb->getBits(5);
// TODO: ignore this parameter if unused
_ctx._unknown1 = _ctx._gb->getBit() ? _ctx._gb->getBits(3) : 0;
_ctx._checksum = _ctx._gb->getBit() ? _ctx._gb->getBits(16) : 0;
// skip picture header extension if any
while (_ctx._gb->getBit()) {
_ctx._gb->skip(8);
}
if (_ctx._gb->getBit()) {
warning("Bad blocks bits encountered!");
}
_ctx._gb->align();
return 0;
}
void Indeo4Decoder::switchBuffers() {
int isPrevRef = 0, isRef = 0;
switch (_ctx._prevFrameType) {
case IVI4_FRAMETYPE_INTRA:
case IVI4_FRAMETYPE_INTRA1:
case IVI4_FRAMETYPE_INTER:
isPrevRef = 1;
break;
default:
break;
}
switch (_ctx._frameType) {
case IVI4_FRAMETYPE_INTRA:
case IVI4_FRAMETYPE_INTRA1:
case IVI4_FRAMETYPE_INTER:
isRef = 1;
break;
default:
break;
}
if (isPrevRef && isRef) {
SWAP(_ctx._dstBuf, _ctx._refBuf);
} else if (isPrevRef) {
SWAP(_ctx._refBuf, _ctx._bRefBuf);
SWAP(_ctx._dstBuf, _ctx._refBuf);
}
}
bool Indeo4Decoder::isNonNullFrame() const {
return _ctx._frameType < IVI4_FRAMETYPE_NULL_FIRST;
}
int Indeo4Decoder::decodeBandHeader(IVIBandDesc *band) {
int plane, bandNum, indx, transformId, scanIndx;
int i;
int quantMat;
plane = _ctx._gb->getBits(2);
bandNum = _ctx._gb->getBits(4);
if (band->_plane != plane || band->_bandNum != bandNum) {
warning("Invalid band header sequence!");
return -1;
}
band->_isEmpty = _ctx._gb->getBit();
if (!band->_isEmpty) {
int old_blk_size = band->_blkSize;
// skip header size
// If header size is not given, header size is 4 bytes.
if (_ctx._gb->getBit())
_ctx._gb->skip(16);
band->_isHalfpel = _ctx._gb->getBits(2);
if (band->_isHalfpel >= 2) {
warning("Invalid/unsupported mv resolution: %d!",
band->_isHalfpel);
return -1;
}
if (!band->_isHalfpel)
_ctx._usesFullpel = true;
band->_checksumPresent = _ctx._gb->getBit();
if (band->_checksumPresent)
band->_checksum = _ctx._gb->getBits(16);
indx = _ctx._gb->getBits(2);
if (indx == 3) {
warning("Invalid block size!");
return -1;
}
band->_mbSize = 16 >> indx;
band->_blkSize = 8 >> (indx >> 1);
band->_inheritMv = _ctx._gb->getBit();
band->_inheritQDelta = _ctx._gb->getBit();
band->_globQuant = _ctx._gb->getBits(5);
if (!_ctx._gb->getBit() || _ctx._frameType == IVI4_FRAMETYPE_INTRA) {
transformId = _ctx._gb->getBits(5);
if ((uint)transformId >= FF_ARRAY_ELEMS(_transforms) ||
!_transforms[transformId]._invTrans) {
warning("Transform %d", transformId);
return -3;
}
if ((transformId >= 7 && transformId <= 9) ||
transformId == 17) {
warning("DCT transform");
return -3;
}
if (transformId < 10 && band->_blkSize < 8) {
warning("wrong transform size!");
return -1;
}
if ((transformId >= 0 && transformId <= 2) || transformId == 10)
_ctx._usesHaar = true;
band->_invTransform = _transforms[transformId]._invTrans;
band->_dcTransform = _transforms[transformId]._dcTrans;
band->_is2dTrans = _transforms[transformId]._is2dTrans;
if (transformId < 10)
band->_transformSize = 8;
else
band->_transformSize = 4;
if (band->_blkSize != band->_transformSize) {
warning("transform and block size mismatch (%d != %d)", band->_transformSize, band->_blkSize);
return -1;
}
scanIndx = _ctx._gb->getBits(4);
if (scanIndx == 15) {
warning("Custom scan pattern encountered!");
return -1;
}
if (scanIndx > 4 && scanIndx < 10) {
if (band->_blkSize != 4) {
warning("mismatching scan table!");
return -1;
}
} else if (band->_blkSize != 8) {
warning("mismatching scan table!");
return -1;
}
band->_scan = _scan_index_to_tab[scanIndx];
band->_scanSize = band->_blkSize;
quantMat = _ctx._gb->getBits(5);
if (quantMat == 31) {
warning("Custom quant matrix encountered!");
return -1;
}
if ((uint)quantMat >= FF_ARRAY_ELEMS(_quant_index_to_tab)) {
warning("Quantization matrix %d", quantMat);
return -1;
}
band->_quantMat = quantMat;
} else {
if (old_blk_size != band->_blkSize) {
warning("The band block size does not match the configuration inherited");
return -1;
}
}
if (_quant_index_to_tab[band->_quantMat] > 4 && band->_blkSize == 4) {
warning("Invalid quant matrix for 4x4 block encountered!");
band->_quantMat = 0;
return -1;
}
if (band->_scanSize != band->_blkSize) {
warning("mismatching scan table!");
return -1;
}
if (band->_transformSize == 8 && band->_blkSize < 8) {
warning("mismatching _transformSize!");
return -1;
}
// decode block huffman codebook
if (!_ctx._gb->getBit())
band->_blkVlc._tab = _ctx._blkVlc._tab;
else
if (band->_blkVlc.decodeHuffDesc(&_ctx, 1, IVI_BLK_HUFF))
return -1;
// select appropriate rvmap table for this band
band->_rvmapSel = _ctx._gb->getBit() ? _ctx._gb->getBits(3) : 8;
// decode rvmap probability corrections if any
band->_numCorr = 0; // there is no corrections
if (_ctx._gb->getBit()) {
band->_numCorr = _ctx._gb->getBits(8); // get number of correction pairs
if (band->_numCorr > 61) {
warning("Too many corrections: %d",
band->_numCorr);
return -1;
}
// read correction pairs
for (i = 0; i < band->_numCorr * 2; i++)
band->_corr[i] = _ctx._gb->getBits(8);
}
}
if (band->_blkSize == 8) {
band->_intraBase = &_ivi4_quant_8x8_intra[_quant_index_to_tab[band->_quantMat]][0];
band->_interBase = &_ivi4_quant_8x8_inter[_quant_index_to_tab[band->_quantMat]][0];
} else {
band->_intraBase = &_ivi4_quant_4x4_intra[_quant_index_to_tab[band->_quantMat]][0];
band->_interBase = &_ivi4_quant_4x4_inter[_quant_index_to_tab[band->_quantMat]][0];
}
// Indeo 4 doesn't use scale tables
band->_intraScale = NULL;
band->_interScale = NULL;
_ctx._gb->align();
if (!band->_scan) {
warning("band->_scan not set");
return -1;
}
return 0;
}
int Indeo4Decoder::decodeMbInfo(IVIBandDesc *band, IVITile *tile) {
int x, y, mvX, mvY, mvDelta, offs, mbOffset, blksPerMb,
mvScale, mbTypeBits, s;
IVIMbInfo *mb, *refMb;
int row_offset = band->_mbSize * band->_pitch;
mb = tile->_mbs;
refMb = tile->_refMbs;
offs = tile->_yPos * band->_pitch + tile->_xPos;
blksPerMb = band->_mbSize != band->_blkSize ? 4 : 1;
mbTypeBits = _ctx._frameType == IVI4_FRAMETYPE_BIDIR ? 2 : 1;
// scale factor for motion vectors
mvScale = (_ctx._planes[0]._bands[0]._mbSize >> 3) - (band->_mbSize >> 3);
mvX = mvY = 0;
if (((tile->_width + band->_mbSize - 1) / band->_mbSize) * ((tile->_height + band->_mbSize - 1) / band->_mbSize) != tile->_numMBs) {
warning("numMBs mismatch %d %d %d %d", tile->_width, tile->_height, band->_mbSize, tile->_numMBs);
return -1;
}
for (y = tile->_yPos; y < tile->_yPos + tile->_height; y += band->_mbSize) {
mbOffset = offs;
for (x = tile->_xPos; x < tile->_xPos + tile->_width; x += band->_mbSize) {
mb->_xPos = x;
mb->_yPos = y;
mb->_bufOffs = mbOffset;
mb->_bMvX = mb->_bMvY = 0;
if (_ctx._gb->getBit()) {
if (_ctx._frameType == IVI4_FRAMETYPE_INTRA) {
warning("Empty macroblock in an INTRA picture!");
return -1;
}
mb->_type = 1; // empty macroblocks are always INTER
mb->_cbp = 0; // all blocks are empty
mb->_qDelta = 0;
if (!band->_plane && !band->_bandNum && _ctx._inQ) {
mb->_qDelta = _ctx._gb->getVLC2<1>(_ctx._mbVlc._tab->_table,
IVI_VLC_BITS);
mb->_qDelta = IVI_TOSIGNED(mb->_qDelta);
}
mb->_mvX = mb->_mvY = 0; // no motion vector coded
if (band->_inheritMv && refMb) {
// motion vector inheritance
if (mvScale) {
mb->_mvX = scaleMV(refMb->_mvX, mvScale);
mb->_mvY = scaleMV(refMb->_mvY, mvScale);
} else {
mb->_mvX = refMb->_mvX;
mb->_mvY = refMb->_mvY;
}
}
} else {
if (band->_inheritMv) {
// copy mb_type from corresponding reference mb
if (!refMb) {
warning("refMb unavailable");
return -1;
}
mb->_type = refMb->_type;
} else if (_ctx._frameType == IVI4_FRAMETYPE_INTRA ||
_ctx._frameType == IVI4_FRAMETYPE_INTRA1) {
mb->_type = 0; // mb_type is always INTRA for intra-frames
} else {
mb->_type = _ctx._gb->getBits(mbTypeBits);
}
mb->_cbp = _ctx._gb->getBits(blksPerMb);
mb->_qDelta = 0;
if (band->_inheritQDelta) {
if (refMb) mb->_qDelta = refMb->_qDelta;
} else if (mb->_cbp || (!band->_plane && !band->_bandNum &&
_ctx._inQ)) {
mb->_qDelta = _ctx._gb->getVLC2<1>(_ctx._mbVlc._tab->_table,
IVI_VLC_BITS);
mb->_qDelta = IVI_TOSIGNED(mb->_qDelta);
}
if (!mb->_type) {
mb->_mvX = mb->_mvY = 0; // there is no motion vector in intra-macroblocks
} else {
if (band->_inheritMv) {
if (refMb) {
// motion vector inheritance
if (mvScale) {
mb->_mvX = scaleMV(refMb->_mvX, mvScale);
mb->_mvY = scaleMV(refMb->_mvY, mvScale);
} else {
mb->_mvX = refMb->_mvX;
mb->_mvY = refMb->_mvY;
}
}
} else {
// decode motion vector deltas
mvDelta = _ctx._gb->getVLC2<1>(_ctx._mbVlc._tab->_table,
IVI_VLC_BITS);
mvY += IVI_TOSIGNED(mvDelta);
mvDelta = _ctx._gb->getVLC2<1>(_ctx._mbVlc._tab->_table,
IVI_VLC_BITS);
mvX += IVI_TOSIGNED(mvDelta);
mb->_mvX = mvX;
mb->_mvY = mvY;
if (mb->_type == 3) {
mvDelta = _ctx._gb->getVLC2<1>(
_ctx._mbVlc._tab->_table,
IVI_VLC_BITS);
mvY += IVI_TOSIGNED(mvDelta);
mvDelta = _ctx._gb->getVLC2<1>(
_ctx._mbVlc._tab->_table,
IVI_VLC_BITS);
mvX += IVI_TOSIGNED(mvDelta);
mb->_bMvX = -mvX;
mb->_bMvY = -mvY;
}
}
if (mb->_type == 2) {
mb->_bMvX = -mb->_mvX;
mb->_bMvY = -mb->_mvY;
mb->_mvX = 0;
mb->_mvY = 0;
}
}
}
s = band->_isHalfpel;
if (mb->_type)
if (x + (mb->_mvX >> s) + (y + (mb->_mvY >> s))*band->_pitch < 0 ||
x + ((mb->_mvX + s) >> s) + band->_mbSize - 1
+ (y + band->_mbSize - 1 + ((mb->_mvY + s) >> s))*band->_pitch > band->_bufSize - 1) {
warning("motion vector %d %d outside reference", x*s + mb->_mvX, y*s + mb->_mvY);
return -1;
}
mb++;
if (refMb)
refMb++;
mbOffset += band->_mbSize;
}
offs += row_offset;
}
_ctx._gb->align();
return 0;
}
int Indeo4Decoder::decodeRLETransparency(VLC_TYPE (*table)[2]) {
const uint32 startPos = _ctx._gb->pos();
_ctx._gb->align();
bool runIsOpaque = _ctx._gb->getBit();
bool nextRunIsOpaque = !runIsOpaque;
uint32 *pixel = (uint32 *)_surface.getPixels();
const int surfacePixelPitch = _surface.pitch / _surface.format.bytesPerPixel;
const int surfacePadding = surfacePixelPitch - _surface.w;
const uint32 *endOfVisibleRow = pixel + _surface.w;
const uint32 *endOfVisibleArea = pixel + surfacePixelPitch * _surface.h - surfacePadding;
const int codecAlignedWidth = (_surface.w + 31) & ~31;
const int codecPaddingSize = codecAlignedWidth - _surface.w;
int numPixelsToRead = codecAlignedWidth * _surface.h;
int numPixelsToSkip = 0;
while (numPixelsToRead > 0) {
int value = _ctx._gb->getVLC2<1>(table, IVI_VLC_BITS);
if (value == -1) {
warning("Transparency VLC code read failed");
return -1;
}
if (value == 0) {
value = 255;
nextRunIsOpaque = runIsOpaque;
}
numPixelsToRead -= value;
debugN(9, "%d%s ", value, runIsOpaque ? "O" : "T");
// The rest of the transparency data must be consumed but it will not
// participate in writing any more pixels
if (pixel == endOfVisibleArea) {
debug(5, "Indeo4: Done writing transparency, but still need to consume %d pixels", numPixelsToRead + value);
continue;
}
// If a run ends in the padding area of a row, the next run needs to
// be partially consumed by the remaining pixels of the padding area
if (numPixelsToSkip) {
value -= numPixelsToSkip;
if (value < 0) {
numPixelsToSkip = -value;
value = 0;
} else {
numPixelsToSkip = 0;
}
}
while (value > 0) {
const int length = MIN<int>(value, endOfVisibleRow - pixel);
if (!runIsOpaque) {
Common::fill(pixel, pixel + length, _ctx._transKeyColor);
}
value -= length;
pixel += length;
if (pixel == endOfVisibleRow) {
pixel += surfacePadding;
endOfVisibleRow += surfacePixelPitch;
value -= codecPaddingSize;
if (value < 0) {
numPixelsToSkip = -value;
break;
}
if (pixel == endOfVisibleArea) {
break;
}
}
}
runIsOpaque = nextRunIsOpaque;
nextRunIsOpaque = !runIsOpaque;
}
debugN(9, "\n");
if (numPixelsToRead != 0) {
warning("Wrong number of transparency pixels read; delta = %d", numPixelsToRead);
}
_ctx._gb->align();
return (_ctx._gb->pos() - startPos) / 8;
}
int Indeo4Decoder::decodeTransparency() {
if (_ctx._gb->getBits(2) != 3 || _ctx._gb->getBits(3) != 0) {
warning("Invalid transparency marker");
return -1;
}
Common::Rect drawRect;
for (int numRects = _ctx._gb->getBits(8); numRects; --numRects) {
const int x1 = _ctx._gb->getBits(16);
const int y1 = _ctx._gb->getBits(16);
const int x2 = x1 + _ctx._gb->getBits(16);
const int y2 = y1 + _ctx._gb->getBits(16);
drawRect.extend(Common::Rect(x1, y1, x2, y2));
}
debug(4, "Indeo4: Transparency rect is (%d, %d, %d, %d)", drawRect.left, drawRect.top, drawRect.right, drawRect.bottom);
if (_ctx._gb->getBit()) { /* @350 */
/* @358 */
_ctx._transKeyColor = _surface.format.ARGBToColor(0, _ctx._gb->getBits(8), _ctx._gb->getBits(8), _ctx._gb->getBits(8));
debug(4, "Indeo4: Key color is %08x", _ctx._transKeyColor);
/* @477 */
}
if (_ctx._gb->getBit() == 0) { /* @4D9 */
warning("Invalid transparency band?");
return -1;
}
IVIHuffDesc huffDesc;
const int numHuffRows = huffDesc._numRows = _ctx._gb->getBits(4);
if (numHuffRows == 0 || numHuffRows > IVI_VLC_BITS - 1) {
warning("Invalid codebook row count %d", numHuffRows);
return -1;
}
for (int i = 0; i < numHuffRows; ++i) {
huffDesc._xBits[i] = _ctx._gb->getBits(4);
}
/* @5E2 */
_ctx._gb->align();
IVIHuffTab &huffTable = _ctx._transVlc;
if (huffDesc.huffDescCompare(&huffTable._custDesc) || !huffTable._custTab._table) {
if (huffTable._custTab._table) {
huffTable._custTab.freeVlc();
}
huffTable._custDesc = huffDesc;
huffTable._tabSel = 7;
huffTable._tab = &huffTable._custTab;
if (huffTable._custDesc.createHuffFromDesc(huffTable._tab, false)) {
// reset faulty description
huffTable._custDesc._numRows = 0;
warning("Error while initializing transparency VLC table");
return -1;
}
}
// FIXME: The transparency plane can be split, apparently for local decoding
// mode (y459.avi in Titanic has the scalable flag and its transparency
// plane seems to be decoded successfully, so the split transparency plane
// does not seem to be related to scaling mode). This adds complexity to the
// implementation, so avoid supporting unless it turns out to actually be
// necessary for correct decoding of game videos.
assert(!_ctx._usesTiling);
assert(_surface.format.bytesPerPixel == 4);
assert((_surface.pitch % 4) == 0);
const uint32 startByte = _ctx._gb->pos() / 8;
/* @68D */
const bool useFillTransparency = _ctx._gb->getBit();
if (useFillTransparency) {
/* @6F2 */
const bool runIsOpaque = _ctx._gb->getBit();
if (!runIsOpaque) {
// It should only be necessary to draw transparency here since the
// data from the YUV planes gets drawn to the output surface on each
// frame, which resets the surface pixels to be fully opaque
_surface.fillRect(Common::Rect(_surface.w, _surface.h), _ctx._transKeyColor);
}
// No alignment here
} else {
/* @7BF */
const bool hasDataSize = _ctx._gb->getBit();
if (hasDataSize) { /* @81A */
/* @822 */
int expectedSize = _ctx._gb->getBits(8);
if (expectedSize == 0xFF) {
expectedSize = _ctx._gb->getBits(24);
}
expectedSize -= ((_ctx._gb->pos() + 7) / 8) - startByte;
const int bytesRead = decodeRLETransparency(huffTable._tab->_table);
if (bytesRead == -1) {
// A more specific warning should have been emitted already
return -1;
} else if (bytesRead != expectedSize) {
warning("Mismatched read %u != %u", bytesRead, expectedSize);
return -1;
}
} else {
/* @95B */
if (decodeRLETransparency(huffTable._tab->_table) == -1) {
warning("Transparency data read failure");
return -1;
}
}
_ctx._gb->align();
}
return 0;
}
int Indeo4Decoder::scaleTileSize(int defSize, int sizeFactor) {
return sizeFactor == 15 ? defSize : (sizeFactor + 1) << 5;
}
int Indeo4Decoder::decodePlaneSubdivision() {
int i;
switch (_ctx._gb->getBits(2)) {
case 3:
return 1;
case 2:
for (i = 0; i < 4; i++)
if (_ctx._gb->getBits(2) != 3)
return 0;
return 4;
default:
return 0;
}
}
/*------------------------------------------------------------------------*/
/**
* Indeo 4 8x8 scan (zigzag) patterns
*/
static const uint8 ivi4AlternateScan8x8[64] = {
0, 8, 1, 9, 16, 24, 2, 3, 17, 25, 10, 11, 32, 40, 48, 56,
4, 5, 6, 7, 33, 41, 49, 57, 18, 19, 26, 27, 12, 13, 14, 15,
34, 35, 43, 42, 50, 51, 59, 58, 20, 21, 22, 23, 31, 30, 29, 28,
36, 37, 38, 39, 47, 46, 45, 44, 52, 53, 54, 55, 63, 62, 61, 60
};
static const uint8 ivi4AlternateScan4x4[16] = {
0, 1, 4, 5, 8, 12, 2, 3, 9, 13, 6, 7, 10, 11, 14, 15
};
static const uint8 ivi4VerticalScan4x4[16] = {
0, 4, 8, 12, 1, 5, 9, 13, 2, 6, 10, 14, 3, 7, 11, 15
};
static const uint8 ivi4HorizontalScan4x4[16] = {
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15
};
const uint Indeo4Decoder::_ivi4_common_pic_sizes[14] = {
640, 480, 320, 240, 160, 120, 704, 480, 352, 240, 352, 288, 176, 144
};
Indeo4Decoder::Transform Indeo4Decoder::_transforms[18] = {
{ IndeoDSP::ffIviInverseHaar8x8, IndeoDSP::ffIviDcHaar2d, 1 },
{ IndeoDSP::ffIviRowHaar8, IndeoDSP::ffIviDcHaar2d, 0 },
{ IndeoDSP::ffIviColHaar8, IndeoDSP::ffIviDcHaar2d, 0 },
{ IndeoDSP::ffIviPutPixels8x8, IndeoDSP::ffIviPutDcPixel8x8, 1 },
{ IndeoDSP::ffIviInverseSlant8x8, IndeoDSP::ffIviDcSlant2d, 1 },
{ IndeoDSP::ffIviRowSlant8, IndeoDSP::ffIviDcRowSlant, 1 },
{ IndeoDSP::ffIviColSlant8, IndeoDSP::ffIviDcColSlant, 1 },
{ NULL, NULL, 0 }, // inverse DCT 8x8
{ NULL, NULL, 0 }, // inverse DCT 8x1
{ NULL, NULL, 0 }, // inverse DCT 1x8
{ IndeoDSP::ffIviInverseHaar4x4, IndeoDSP::ffIviDcHaar2d, 1 },
{ IndeoDSP::ffIviInverseSlant4x4, IndeoDSP::ffIviDcSlant2d, 1 },
{ NULL, NULL, 0 }, // no transform 4x4
{ IndeoDSP::ffIviRowHaar4, IndeoDSP::ffIviDcHaar2d, 0 },
{ IndeoDSP::ffIviColHaar4, IndeoDSP::ffIviDcHaar2d, 0 },
{ IndeoDSP::ffIviRowSlant4, IndeoDSP::ffIviDcRowSlant, 0 },
{ IndeoDSP::ffIviColSlant4, IndeoDSP::ffIviDcColSlant, 0 },
{ NULL, NULL, 0 }, // inverse DCT 4x4
};
const uint8 *const Indeo4Decoder::_scan_index_to_tab[15] = {
// for 8x8 transforms
ffZigZagDirect,
ivi4AlternateScan8x8,
_ffIviHorizontalScan8x8,
_ffIviVerticalScan8x8,
ffZigZagDirect,
// for 4x4 transforms
_ffIviDirectScan4x4,
ivi4AlternateScan4x4,
ivi4VerticalScan4x4,
ivi4HorizontalScan4x4,
_ffIviDirectScan4x4,
// TODO: check if those are needed
_ffIviHorizontalScan8x8,
_ffIviHorizontalScan8x8,
_ffIviHorizontalScan8x8,
_ffIviHorizontalScan8x8,
_ffIviHorizontalScan8x8
};
/**
* Indeo 4 dequant tables
*/
const uint16 Indeo4Decoder::_ivi4_quant_8x8_intra[9][64] = {
{
43, 342, 385, 470, 555, 555, 598, 726,
342, 342, 470, 513, 555, 598, 726, 769,
385, 470, 555, 555, 598, 726, 726, 811,
470, 470, 555, 555, 598, 726, 769, 854,
470, 555, 555, 598, 683, 726, 854, 1025,
555, 555, 598, 683, 726, 854, 1025, 1153,
555, 555, 598, 726, 811, 982, 1195, 1451,
555, 598, 726, 811, 982, 1195, 1451, 1793
},
{
86, 1195, 2390, 2390, 4865, 4865, 4865, 4865,
1195, 1195, 2390, 2390, 4865, 4865, 4865, 4865,
2390, 2390, 4865, 4865, 6827, 6827, 6827, 6827,
2390, 2390, 4865, 4865, 6827, 6827, 6827, 6827,
4865, 4865, 6827, 6827, 6827, 6827, 6827, 6827,
4865, 4865, 6827, 6827, 6827, 6827, 6827, 6827,
4865, 4865, 6827, 6827, 6827, 6827, 6827, 6827,
4865, 4865, 6827, 6827, 6827, 6827, 6827, 6827
},
{
235, 1067, 1195, 1323, 1451, 1579, 1707, 1835,
235, 1067, 1195, 1323, 1451, 1579, 1707, 1835,
235, 1067, 1195, 1323, 1451, 1579, 1707, 1835,
235, 1067, 1195, 1323, 1451, 1579, 1707, 1835,
235, 1067, 1195, 1323, 1451, 1579, 1707, 1835,
235, 1067, 1195, 1323, 1451, 1579, 1707, 1835,
235, 1067, 1195, 1323, 1451, 1579, 1707, 1835,
235, 1067, 1195, 1323, 1451, 1579, 1707, 1835
},
{
1707, 1707, 3414, 3414, 3414, 3414, 3414, 3414,
1707, 1707, 3414, 3414, 3414, 3414, 3414, 3414,
1707, 1707, 3414, 3414, 3414, 3414, 3414, 3414,
1707, 1707, 3414, 3414, 3414, 3414, 3414, 3414,
1707, 1707, 3414, 3414, 3414, 3414, 3414, 3414,
1707, 1707, 3414, 3414, 3414, 3414, 3414, 3414,
1707, 1707, 3414, 3414, 3414, 3414, 3414, 3414,
1707, 1707, 3414, 3414, 3414, 3414, 3414, 3414
},
{
897, 897, 897, 897, 897, 897, 897, 897,
1067, 1067, 1067, 1067, 1067, 1067, 1067, 1067,
1238, 1238, 1238, 1238, 1238, 1238, 1238, 1238,
1409, 1409, 1409, 1409, 1409, 1409, 1409, 1409,
1579, 1579, 1579, 1579, 1579, 1579, 1579, 1579,
1750, 1750, 1750, 1750, 1750, 1750, 1750, 1750,
1921, 1921, 1921, 1921, 1921, 1921, 1921, 1921,
2091, 2091, 2091, 2091, 2091, 2091, 2091, 2091
},
{
1707, 1707, 1707, 1707, 1707, 1707, 1707, 1707,
1707, 1707, 1707, 1707, 1707, 1707, 1707, 1707,
3414, 3414, 3414, 3414, 3414, 3414, 3414, 3414,
3414, 3414, 3414, 3414, 3414, 3414, 3414, 3414,
3414, 3414, 3414, 3414, 3414, 3414, 3414, 3414,
3414, 3414, 3414, 3414, 3414, 3414, 3414, 3414,
3414, 3414, 3414, 3414, 3414, 3414, 3414, 3414,
3414, 3414, 3414, 3414, 3414, 3414, 3414, 3414
},
{
2390, 2390, 2390, 2390, 2390, 2390, 2390, 2390,
2390, 2390, 2390, 2390, 2390, 2390, 2390, 2390,
2390, 2390, 2390, 2390, 2390, 2390, 2390, 2390,
2390, 2390, 2390, 2390, 2390, 2390, 2390, 2390,
2390, 2390, 2390, 2390, 2390, 2390, 2390, 2390,
2390, 2390, 2390, 2390, 2390, 2390, 2390, 2390,
2390, 2390, 2390, 2390, 2390, 2390, 2390, 2390,
2390, 2390, 2390, 2390, 2390, 2390, 2390, 2390
},
{
22, 171, 214, 257, 257, 299, 299, 342,
171, 171, 257, 257, 299, 299, 342, 385,
214, 257, 257, 299, 299, 342, 342, 385,
257, 257, 257, 299, 299, 342, 385, 427,
257, 257, 299, 299, 342, 385, 427, 513,
257, 299, 299, 342, 385, 427, 513, 598,
299, 299, 299, 385, 385, 470, 598, 726,
299, 299, 385, 385, 470, 598, 726, 897
},
{
86, 598, 1195, 1195, 2390, 2390, 2390, 2390,
598, 598, 1195, 1195, 2390, 2390, 2390, 2390,
1195, 1195, 2390, 2390, 3414, 3414, 3414, 3414,
1195, 1195, 2390, 2390, 3414, 3414, 3414, 3414,
2390, 2390, 3414, 3414, 3414, 3414, 3414, 3414,
2390, 2390, 3414, 3414, 3414, 3414, 3414, 3414,
2390, 2390, 3414, 3414, 3414, 3414, 3414, 3414,
2390, 2390, 3414, 3414, 3414, 3414, 3414, 3414
}
};
const uint16 Indeo4Decoder::_ivi4_quant_8x8_inter[9][64] = {
{
427, 427, 470, 427, 427, 427, 470, 470,
427, 427, 470, 427, 427, 427, 470, 470,
470, 470, 470, 470, 470, 470, 470, 470,
427, 427, 470, 470, 427, 427, 470, 470,
427, 427, 470, 427, 427, 427, 470, 470,
427, 427, 470, 427, 427, 427, 470, 470,
470, 470, 470, 470, 470, 470, 470, 470,
470, 470, 470, 470, 470, 470, 470, 470
},
{
1707, 1707, 2433, 2433, 3414, 3414, 3414, 3414,
1707, 1707, 2433, 2433, 3414, 3414, 3414, 3414,
2433, 2433, 3414, 3414, 4822, 4822, 4822, 4822,
2433, 2433, 3414, 3414, 4822, 4822, 4822, 4822,
3414, 3414, 4822, 4822, 3414, 3414, 3414, 3414,
3414, 3414, 4822, 4822, 3414, 3414, 3414, 3414,
3414, 3414, 4822, 4822, 3414, 3414, 3414, 3414,
3414, 3414, 4822, 4822, 3414, 3414, 3414, 3414
},
{
1195, 1195, 1281, 1238, 1195, 1195, 1281, 1281,
1195, 1195, 1281, 1238, 1195, 1195, 1281, 1281,
1195, 1195, 1281, 1238, 1195, 1195, 1281, 1281,
1195, 1195, 1281, 1238, 1195, 1195, 1281, 1281,
1195, 1195, 1281, 1238, 1195, 1195, 1281, 1281,
1195, 1195, 1281, 1238, 1195, 1195, 1281, 1281,
1195, 1195, 1281, 1238, 1195, 1195, 1281, 1281,
1195, 1195, 1281, 1238, 1195, 1195, 1281, 1281
},
{
2433, 2433, 3414, 3414, 2433, 2433, 2433, 2433,
2433, 2433, 3414, 3414, 2433, 2433, 2433, 2433,
2433, 2433, 3414, 3414, 2433, 2433, 2433, 2433,
2433, 2433, 3414, 3414, 2433, 2433, 2433, 2433,
2433, 2433, 3414, 3414, 2433, 2433, 2433, 2433,
2433, 2433, 3414, 3414, 2433, 2433, 2433, 2433,
2433, 2433, 3414, 3414, 2433, 2433, 2433, 2433,
2433, 2433, 3414, 3414, 2433, 2433, 2433, 2433
},
{
1195, 1195, 1195, 1195, 1195, 1195, 1195, 1195,
1195, 1195, 1195, 1195, 1195, 1195, 1195, 1195,
1281, 1281, 1281, 1281, 1281, 1281, 1281, 1281,
1238, 1238, 1238, 1238, 1238, 1238, 1238, 1238,
1195, 1195, 1195, 1195, 1195, 1195, 1195, 1195,
1195, 1195, 1195, 1195, 1195, 1195, 1195, 1195,
1281, 1281, 1281, 1281, 1281, 1281, 1281, 1281,
1281, 1281, 1281, 1281, 1281, 1281, 1281, 1281
},
{
2433, 2433, 2433, 2433, 2433, 2433, 2433, 2433,
2433, 2433, 2433, 2433, 2433, 2433, 2433, 2433,
3414, 3414, 3414, 3414, 3414, 3414, 3414, 3414,
3414, 3414, 3414, 3414, 3414, 3414, 3414, 3414,
2433, 2433, 2433, 2433, 2433, 2433, 2433, 2433,
2433, 2433, 2433, 2433, 2433, 2433, 2433, 2433,
2433, 2433, 2433, 2433, 2433, 2433, 2433, 2433,
2433, 2433, 2433, 2433, 2433, 2433, 2433, 2433
},
{
1707, 1707, 1707, 1707, 1707, 1707, 1707, 1707,
1707, 1707, 1707, 1707, 1707, 1707, 1707, 1707,
1707, 1707, 1707, 1707, 1707, 1707, 1707, 1707,
1707, 1707, 1707, 1707, 1707, 1707, 1707, 1707,
1707, 1707, 1707, 1707, 1707, 1707, 1707, 1707,
1707, 1707, 1707, 1707, 1707, 1707, 1707, 1707,
1707, 1707, 1707, 1707, 1707, 1707, 1707, 1707,
1707, 1707, 1707, 1707, 1707, 1707, 1707, 1707
},
{
86, 171, 171, 214, 214, 214, 214, 257,
171, 171, 214, 214, 214, 214, 257, 257,
171, 214, 214, 214, 214, 257, 257, 257,
214, 214, 214, 214, 257, 257, 257, 299,
214, 214, 214, 257, 257, 257, 299, 299,
214, 214, 257, 257, 257, 299, 299, 299,
214, 257, 257, 257, 299, 299, 299, 342,
257, 257, 257, 299, 299, 299, 342, 342
},
{
854, 854, 1195, 1195, 1707, 1707, 1707, 1707,
854, 854, 1195, 1195, 1707, 1707, 1707, 1707,
1195, 1195, 1707, 1707, 2390, 2390, 2390, 2390,
1195, 1195, 1707, 1707, 2390, 2390, 2390, 2390,
1707, 1707, 2390, 2390, 1707, 1707, 1707, 1707,
1707, 1707, 2390, 2390, 1707, 1707, 1707, 1707,
1707, 1707, 2390, 2390, 1707, 1707, 1707, 1707,
1707, 1707, 2390, 2390, 1707, 1707, 1707, 1707
}
};
const uint16 Indeo4Decoder::_ivi4_quant_4x4_intra[5][16] = {
{
22, 214, 257, 299,
214, 257, 299, 342,
257, 299, 342, 427,
299, 342, 427, 513
},
{
129, 1025, 1451, 1451,
1025, 1025, 1451, 1451,
1451, 1451, 2049, 2049,
1451, 1451, 2049, 2049
},
{
43, 171, 171, 171,
43, 171, 171, 171,
43, 171, 171, 171,
43, 171, 171, 171
},
{
43, 43, 43, 43,
171, 171, 171, 171,
171, 171, 171, 171,
171, 171, 171, 171
},
{
43, 43, 43, 43,
43, 43, 43, 43,
43, 43, 43, 43,
43, 43, 43, 43
}
};
const uint16 Indeo4Decoder::_ivi4_quant_4x4_inter[5][16] = {
{
107, 214, 257, 299,
214, 257, 299, 299,
257, 299, 299, 342,
299, 299, 342, 342
},
{
513, 1025, 1238, 1238,
1025, 1025, 1238, 1238,
1238, 1238, 1451, 1451,
1238, 1238, 1451, 1451
},
{
43, 171, 171, 171,
43, 171, 171, 171,
43, 171, 171, 171,
43, 171, 171, 171
},
{
43, 43, 43, 43,
171, 171, 171, 171,
171, 171, 171, 171,
171, 171, 171, 171
},
{
43, 43, 43, 43,
43, 43, 43, 43,
43, 43, 43, 43,
43, 43, 43, 43
}
};
const uint8 Indeo4Decoder::_quant_index_to_tab[22] = {
0, 1, 0, 2, 1, 3, 0, 4, 1, 5, 0, 1, 6, 7, 8, // for 8x8 quant matrixes
0, 1, 2, 2, 3, 3, 4 // for 4x4 quant matrixes
};
} // End of namespace Image
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