diff options
Diffstat (limited to 'graphics/video/codecs')
-rw-r--r-- | graphics/video/codecs/cinepak.cpp | 287 | ||||
-rw-r--r-- | graphics/video/codecs/cinepak.h | 81 | ||||
-rw-r--r-- | graphics/video/codecs/mjpeg.cpp | 73 | ||||
-rw-r--r-- | graphics/video/codecs/mjpeg.h | 58 | ||||
-rw-r--r-- | graphics/video/codecs/qtrle.cpp | 420 | ||||
-rw-r--r-- | graphics/video/codecs/qtrle.h | 58 | ||||
-rw-r--r-- | graphics/video/codecs/rpza.cpp | 208 | ||||
-rw-r--r-- | graphics/video/codecs/rpza.h | 49 | ||||
-rw-r--r-- | graphics/video/codecs/smc.cpp | 385 | ||||
-rw-r--r-- | graphics/video/codecs/smc.h | 59 |
10 files changed, 1678 insertions, 0 deletions
diff --git a/graphics/video/codecs/cinepak.cpp b/graphics/video/codecs/cinepak.cpp new file mode 100644 index 0000000000..d3448bb8f7 --- /dev/null +++ b/graphics/video/codecs/cinepak.cpp @@ -0,0 +1,287 @@ +/* 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 "graphics/video/codecs/cinepak.h" + +#include "common/system.h" + +// Code here partially based off of ffmpeg ;) + +namespace Graphics { + +// Convert a color from YUV to RGB colorspace, Cinepak style. +inline static void CPYUV2RGB(byte y, byte u, byte v, byte &r, byte &g, byte &b) { + r = CLIP<int>(y + 2 * (v - 128), 0, 255); + g = CLIP<int>(y - (u - 128) / 2 - (v - 128), 0, 255); + b = CLIP<int>(y + 2 * (u - 128), 0, 255); +} + +#define PUT_PIXEL(offset, lum, u, v) \ + CPYUV2RGB(lum, u, v, r, g, b); \ + if (_pixelFormat.bytesPerPixel == 2) \ + *((uint16 *)_curFrame.surface->pixels + offset) = _pixelFormat.RGBToColor(r, g, b); \ + else \ + *((uint32 *)_curFrame.surface->pixels + offset) = _pixelFormat.RGBToColor(r, g, b) + +CinepakDecoder::CinepakDecoder() : Codec() { + _curFrame.surface = NULL; + _curFrame.strips = NULL; + _y = 0; + _pixelFormat = g_system->getScreenFormat(); +} + +CinepakDecoder::~CinepakDecoder() { + if (_curFrame.surface) + _curFrame.surface->free(); + delete[] _curFrame.strips; +} + +Surface *CinepakDecoder::decodeImage(Common::SeekableReadStream *stream) { + _curFrame.flags = stream->readByte(); + _curFrame.length = (stream->readByte() << 16) + stream->readUint16BE(); + _curFrame.width = stream->readUint16BE(); + _curFrame.height = stream->readUint16BE(); + _curFrame.stripCount = stream->readUint16BE(); + + if (_curFrame.strips == NULL) + _curFrame.strips = new CinepakStrip[_curFrame.stripCount]; + + debug (4, "Cinepak Frame: Width = %d, Height = %d, Strip Count = %d", _curFrame.width, _curFrame.height, _curFrame.stripCount); + +#if 0 + // Borrowed from FFMPEG. This should cut out the extra data Cinepak for Sega has (which is useless). + // The theory behind this is that this is here to confuse standard Cinepak decoders. But, we won't let that happen! ;) + if (_curFrame.length != (uint32)stream->size()) { + if (stream->readUint16BE() == 0xFE00) + stream->readUint32BE(); + } +#endif + + if (!_curFrame.surface) { + _curFrame.surface = new Surface(); + _curFrame.surface->create(_curFrame.width, _curFrame.height, _pixelFormat.bytesPerPixel); + } + + // Reset the y variable. + _y = 0; + + for (uint16 i = 0; i < _curFrame.stripCount; i++) { + if (i > 0 && !(_curFrame.flags & 1)) { // Use codebooks from last strip + for (uint16 j = 0; j < 256; j++) { + _curFrame.strips[i].v1_codebook[j] = _curFrame.strips[i - 1].v1_codebook[j]; + _curFrame.strips[i].v4_codebook[j] = _curFrame.strips[i - 1].v4_codebook[j]; + } + } + + _curFrame.strips[i].id = stream->readUint16BE(); + _curFrame.strips[i].length = stream->readUint16BE() - 12; // Subtract the 12 byte header + _curFrame.strips[i].rect.top = _y; stream->readUint16BE(); // Ignore, substitute with our own. + _curFrame.strips[i].rect.left = 0; stream->readUint16BE(); // Ignore, substitute with our own + _curFrame.strips[i].rect.bottom = _y + stream->readUint16BE(); + _curFrame.strips[i].rect.right = _curFrame.width; stream->readUint16BE(); // Ignore, substitute with our own + + //printf ("Left = %d, Top = %d, Right = %d, Bottom = %d\n", _curFrame.strips[i].rect.left, _curFrame.strips[i].rect.top, _curFrame.strips[i].rect.right, _curFrame.strips[i].rect.bottom); + + // Sanity check. Because Cinepak is based on 4x4 blocks, the width and height of each strip needs to be divisible by 4. + assert(!(_curFrame.strips[i].rect.width() % 4) && !(_curFrame.strips[i].rect.height() % 4)); + + uint32 pos = stream->pos(); + + while ((uint32)stream->pos() < (pos + _curFrame.strips[i].length) && !stream->eos()) { + byte chunkID = stream->readByte(); + + if (stream->eos()) + break; + + // Chunk Size is 24-bit, ignore the first 4 bytes + uint32 chunkSize = stream->readByte() << 16; + chunkSize += stream->readUint16BE() - 4; + + int32 startPos = stream->pos(); + + switch (chunkID) { + case 0x20: + case 0x21: + case 0x24: + case 0x25: + loadCodebook(stream, i, 4, chunkID, chunkSize); + break; + case 0x22: + case 0x23: + case 0x26: + case 0x27: + loadCodebook(stream, i, 1, chunkID, chunkSize); + break; + case 0x30: + case 0x31: + case 0x32: + decodeVectors(stream, i, chunkID, chunkSize); + break; + default: + warning("Unknown Cinepak chunk ID %02x", chunkID); + return _curFrame.surface; + } + + if (stream->pos() != startPos + (int32)chunkSize) + stream->seek(startPos + chunkSize); + } + + _y = _curFrame.strips[i].rect.bottom; + } + + return _curFrame.surface; +} + +void CinepakDecoder::loadCodebook(Common::SeekableReadStream *stream, uint16 strip, byte codebookType, byte chunkID, uint32 chunkSize) { + CinepakCodebook *codebook = (codebookType == 1) ? _curFrame.strips[strip].v1_codebook : _curFrame.strips[strip].v4_codebook; + + int32 startPos = stream->pos(); + uint32 flag = 0, mask = 0; + + for (uint16 i = 0; i < 256; i++) { + if ((chunkID & 0x01) && !(mask >>= 1)) { + if ((stream->pos() - startPos + 4) > (int32)chunkSize) + break; + + flag = stream->readUint32BE(); + mask = 0x80000000; + } + + if (!(chunkID & 0x01) || (flag & mask)) { + byte n = (chunkID & 0x04) ? 4 : 6; + if ((stream->pos() - startPos + n) > (int32)chunkSize) + break; + + for (byte j = 0; j < 4; j++) + codebook[i].y[j] = stream->readByte(); + + if (n == 6) { + codebook[i].u = stream->readByte() + 128; + codebook[i].v = stream->readByte() + 128; + } else { + /* this codebook type indicates either greyscale or + * palettized video; if palettized, U & V components will + * not be used so it is safe to set them to 128 for the + * benefit of greyscale rendering in YUV420P */ + codebook[i].u = 128; + codebook[i].v = 128; + } + } + } +} + +void CinepakDecoder::decodeVectors(Common::SeekableReadStream *stream, uint16 strip, byte chunkID, uint32 chunkSize) { + uint32 flag = 0, mask = 0; + uint32 iy[4]; + int32 startPos = stream->pos(); + byte r = 0, g = 0, b = 0; + + for (uint16 y = _curFrame.strips[strip].rect.top; y < _curFrame.strips[strip].rect.bottom; y += 4) { + iy[0] = _curFrame.strips[strip].rect.left + y * _curFrame.width; + iy[1] = iy[0] + _curFrame.width; + iy[2] = iy[1] + _curFrame.width; + iy[3] = iy[2] + _curFrame.width; + + for (uint16 x = _curFrame.strips[strip].rect.left; x < _curFrame.strips[strip].rect.right; x += 4) { + if ((chunkID & 0x01) && !(mask >>= 1)) { + if ((stream->pos() - startPos + 4) > (int32)chunkSize) + return; + + flag = stream->readUint32BE(); + mask = 0x80000000; + } + + if (!(chunkID & 0x01) || (flag & mask)) { + if (!(chunkID & 0x02) && !(mask >>= 1)) { + if ((stream->pos() - startPos + 4) > (int32)chunkSize) + return; + + flag = stream->readUint32BE(); + mask = 0x80000000; + } + + if ((chunkID & 0x02) || (~flag & mask)) { + if ((stream->pos() - startPos + 1) > (int32)chunkSize) + return; + + // Get the codebook + CinepakCodebook codebook = _curFrame.strips[strip].v1_codebook[stream->readByte()]; + + PUT_PIXEL(iy[0] + 0, codebook.y[0], codebook.u, codebook.v); + PUT_PIXEL(iy[0] + 1, codebook.y[0], codebook.u, codebook.v); + PUT_PIXEL(iy[1] + 0, codebook.y[0], codebook.u, codebook.v); + PUT_PIXEL(iy[1] + 1, codebook.y[0], codebook.u, codebook.v); + + PUT_PIXEL(iy[0] + 2, codebook.y[1], codebook.u, codebook.v); + PUT_PIXEL(iy[0] + 3, codebook.y[1], codebook.u, codebook.v); + PUT_PIXEL(iy[1] + 2, codebook.y[1], codebook.u, codebook.v); + PUT_PIXEL(iy[1] + 3, codebook.y[1], codebook.u, codebook.v); + + PUT_PIXEL(iy[2] + 0, codebook.y[2], codebook.u, codebook.v); + PUT_PIXEL(iy[2] + 1, codebook.y[2], codebook.u, codebook.v); + PUT_PIXEL(iy[3] + 0, codebook.y[2], codebook.u, codebook.v); + PUT_PIXEL(iy[3] + 1, codebook.y[2], codebook.u, codebook.v); + + PUT_PIXEL(iy[2] + 2, codebook.y[3], codebook.u, codebook.v); + PUT_PIXEL(iy[2] + 3, codebook.y[3], codebook.u, codebook.v); + PUT_PIXEL(iy[3] + 2, codebook.y[3], codebook.u, codebook.v); + PUT_PIXEL(iy[3] + 3, codebook.y[3], codebook.u, codebook.v); + } else if (flag & mask) { + if ((stream->pos() - startPos + 4) > (int32)chunkSize) + return; + + CinepakCodebook codebook = _curFrame.strips[strip].v4_codebook[stream->readByte()]; + PUT_PIXEL(iy[0] + 0, codebook.y[0], codebook.u, codebook.v); + PUT_PIXEL(iy[0] + 1, codebook.y[1], codebook.u, codebook.v); + PUT_PIXEL(iy[1] + 0, codebook.y[2], codebook.u, codebook.v); + PUT_PIXEL(iy[1] + 1, codebook.y[3], codebook.u, codebook.v); + + codebook = _curFrame.strips[strip].v4_codebook[stream->readByte()]; + PUT_PIXEL(iy[0] + 2, codebook.y[0], codebook.u, codebook.v); + PUT_PIXEL(iy[0] + 3, codebook.y[1], codebook.u, codebook.v); + PUT_PIXEL(iy[1] + 2, codebook.y[2], codebook.u, codebook.v); + PUT_PIXEL(iy[1] + 3, codebook.y[3], codebook.u, codebook.v); + + codebook = _curFrame.strips[strip].v4_codebook[stream->readByte()]; + PUT_PIXEL(iy[2] + 0, codebook.y[0], codebook.u, codebook.v); + PUT_PIXEL(iy[2] + 1, codebook.y[1], codebook.u, codebook.v); + PUT_PIXEL(iy[3] + 0, codebook.y[2], codebook.u, codebook.v); + PUT_PIXEL(iy[3] + 1, codebook.y[3], codebook.u, codebook.v); + + codebook = _curFrame.strips[strip].v4_codebook[stream->readByte()]; + PUT_PIXEL(iy[2] + 2, codebook.y[0], codebook.u, codebook.v); + PUT_PIXEL(iy[2] + 3, codebook.y[1], codebook.u, codebook.v); + PUT_PIXEL(iy[3] + 2, codebook.y[2], codebook.u, codebook.v); + PUT_PIXEL(iy[3] + 3, codebook.y[3], codebook.u, codebook.v); + } + } + + for (byte i = 0; i < 4; i++) + iy[i] += 4; + } + } +} + +} // End of namespace Graphics diff --git a/graphics/video/codecs/cinepak.h b/graphics/video/codecs/cinepak.h new file mode 100644 index 0000000000..92351cdba8 --- /dev/null +++ b/graphics/video/codecs/cinepak.h @@ -0,0 +1,81 @@ +/* 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. + * + * $URL$ + * $Id$ + * + */ + +#ifndef GRAPHICS_CINEPAK_H +#define GRAPHICS_CINEPAK_H + +#include "common/scummsys.h" +#include "common/stream.h" +#include "common/rect.h" +#include "graphics/surface.h" +#include "graphics/pixelformat.h" + +#include "graphics/video/codecs/codec.h" + +namespace Graphics { + +struct CinepakCodebook { + byte y[4]; + byte u, v; +}; + +struct CinepakStrip { + uint16 id; + uint16 length; + Common::Rect rect; + CinepakCodebook v1_codebook[256], v4_codebook[256]; +}; + +struct CinepakFrame { + byte flags; + uint32 length; + uint16 width; + uint16 height; + uint16 stripCount; + CinepakStrip *strips; + + Surface *surface; +}; + +class CinepakDecoder : public Codec { +public: + CinepakDecoder(); + ~CinepakDecoder(); + + Surface *decodeImage(Common::SeekableReadStream *stream); + PixelFormat getPixelFormat() const { return _pixelFormat; } + +private: + CinepakFrame _curFrame; + int32 _y; + PixelFormat _pixelFormat; + + void loadCodebook(Common::SeekableReadStream *stream, uint16 strip, byte codebookType, byte chunkID, uint32 chunkSize); + void decodeVectors(Common::SeekableReadStream *stream, uint16 strip, byte chunkID, uint32 chunkSize); +}; + +} // End of namespace Graphics + +#endif diff --git a/graphics/video/codecs/mjpeg.cpp b/graphics/video/codecs/mjpeg.cpp new file mode 100644 index 0000000000..76363036ee --- /dev/null +++ b/graphics/video/codecs/mjpeg.cpp @@ -0,0 +1,73 @@ +/* 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/system.h" +#include "graphics/conversion.h" // For YUV2RGB + +#include "graphics/video/codecs/mjpeg.h" + +namespace Graphics { + +JPEGDecoder::JPEGDecoder() : Codec() { + _jpeg = new JPEG(); + _pixelFormat = g_system->getScreenFormat(); + _surface = NULL; +} + +JPEGDecoder::~JPEGDecoder() { + delete _jpeg; + + if (_surface) { + _surface->free(); + delete _surface; + } +} + +Surface *JPEGDecoder::decodeImage(Common::SeekableReadStream* stream) { + _jpeg->read(stream); + Surface *ySurface = _jpeg->getComponent(1); + Surface *uSurface = _jpeg->getComponent(2); + Surface *vSurface = _jpeg->getComponent(3); + + if (!_surface) { + _surface = new Surface(); + _surface->create(ySurface->w, ySurface->h, _pixelFormat.bytesPerPixel); + } + + for (uint16 i = 0; i < _surface->h; i++) { + for (uint16 j = 0; j < _surface->w; j++) { + byte r = 0, g = 0, b = 0; + YUV2RGB(*((byte *)ySurface->getBasePtr(j, i)), *((byte *)uSurface->getBasePtr(j, i)), *((byte *)vSurface->getBasePtr(j, i)), r, g, b); + if (_pixelFormat.bytesPerPixel == 2) + *((uint16 *)_surface->getBasePtr(j, i)) = _pixelFormat.RGBToColor(r, g, b); + else + *((uint32 *)_surface->getBasePtr(j, i)) = _pixelFormat.RGBToColor(r, g, b); + } + } + + return _surface; +} + +} // End of namespace Graphics diff --git a/graphics/video/codecs/mjpeg.h b/graphics/video/codecs/mjpeg.h new file mode 100644 index 0000000000..ab364fb5be --- /dev/null +++ b/graphics/video/codecs/mjpeg.h @@ -0,0 +1,58 @@ +/* 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. + * + * $URL$ + * $Id$ + * + */ + +#ifndef GRAPHICS_MJPEG_H +#define GRAPHICS_MJPEG_H + +#include "common/scummsys.h" +#include "common/stream.h" + +#include "graphics/video/codecs/codec.h" +#include "graphics/jpeg.h" +#include "graphics/pixelformat.h" + +namespace Graphics { + +// Motion JPEG Decoder +// Basically a wrapper around JPEG which converts to RGB and also functions +// as a Codec. + +class JPEGDecoder : public Codec { +public: + JPEGDecoder(); + ~JPEGDecoder(); + + Surface *decodeImage(Common::SeekableReadStream *stream); + PixelFormat getPixelFormat() const { return _pixelFormat; } + +private: + PixelFormat _pixelFormat; + JPEG *_jpeg; + Surface *_surface; +}; + +} // End of namespace Graphics + +#endif diff --git a/graphics/video/codecs/qtrle.cpp b/graphics/video/codecs/qtrle.cpp new file mode 100644 index 0000000000..3e3fd4cfce --- /dev/null +++ b/graphics/video/codecs/qtrle.cpp @@ -0,0 +1,420 @@ +/* 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. + * + * $URL$ + * $Id$ + * + */ + +// QuickTime RLE Decoder +// Based off ffmpeg's QuickTime RLE decoder (written by Mike Melanson) + +#include "graphics/video/codecs/qtrle.h" + +#include "common/scummsys.h" +#include "common/stream.h" +#include "common/system.h" +#include "graphics/colormasks.h" +#include "graphics/surface.h" + +namespace Graphics { + +QTRLEDecoder::QTRLEDecoder(uint16 width, uint16 height, byte bitsPerPixel) : Codec() { + _bitsPerPixel = bitsPerPixel; + _pixelFormat = g_system->getScreenFormat(); + + // We need to increase the surface size to a multiple of 4 + uint16 wMod = width % 4; + if(wMod != 0) + width += 4 - wMod; + + debug(2, "QTRLE corrected width: %d", width); + + _surface = new Surface(); + _surface->create(width, height, _bitsPerPixel <= 8 ? 1 : _pixelFormat.bytesPerPixel); +} + +#define CHECK_STREAM_PTR(n) \ + if ((stream->pos() + n) > stream->size()) { \ + warning ("Problem: stream out of bounds (%d >= %d)", stream->pos() + n, stream->size()); \ + return; \ + } + +#define CHECK_PIXEL_PTR(n) \ + if ((int32)pixelPtr + n > _surface->w * _surface->h) { \ + warning ("Problem: pixel ptr = %d, pixel limit = %d", pixelPtr + n, _surface->w * _surface->h); \ + return; \ + } \ + +void QTRLEDecoder::decode1(Common::SeekableReadStream *stream, uint32 rowPtr, uint32 linesToChange) { + uint32 pixelPtr = 0; + byte *rgb = (byte *)_surface->pixels; + + while (linesToChange) { + CHECK_STREAM_PTR(2); + byte skip = stream->readByte(); + int8 rleCode = stream->readSByte(); + + if (rleCode == 0) + break; + + if (skip & 0x80) { + linesToChange--; + rowPtr += _surface->w; + pixelPtr = rowPtr + 2 * (skip & 0x7f); + } else + pixelPtr += 2 * skip; + + if (rleCode < 0) { + // decode the run length code + rleCode = -rleCode; + // get the next 2 bytes from the stream, treat them as groups of 8 pixels, and output them rleCode times */ + CHECK_STREAM_PTR(2); + byte pi0 = stream->readByte(); + byte pi1 = stream->readByte(); + CHECK_PIXEL_PTR(rleCode * 2); + + while (rleCode--) { + rgb[pixelPtr++] = pi0; + rgb[pixelPtr++] = pi1; + } + } else { + // copy the same pixel directly to output 2 times + rleCode *= 2; + CHECK_STREAM_PTR(rleCode); + CHECK_PIXEL_PTR(rleCode); + + while (rleCode--) + rgb[pixelPtr++] = stream->readByte(); + } + } +} + +void QTRLEDecoder::decode2_4(Common::SeekableReadStream *stream, uint32 rowPtr, uint32 linesToChange, byte bpp) { + uint32 pixelPtr = 0; + byte *rgb = (byte *)_surface->pixels; + byte numPixels = (bpp == 4) ? 8 : 16; + + while (linesToChange--) { + CHECK_STREAM_PTR(2); + pixelPtr = rowPtr + (numPixels * (stream->readByte() - 1)); + + for (int8 rleCode = stream->readSByte(); rleCode != -1; rleCode = stream->readSByte()) { + if (rleCode == 0) { + // there's another skip code in the stream + CHECK_STREAM_PTR(1); + pixelPtr += (numPixels * (stream->readByte() - 1)); + } else if (rleCode < 0) { + // decode the run length code + rleCode = -rleCode; + + // get the next 4 bytes from the stream, treat them as palette indices, and output them rleCode times */ + CHECK_STREAM_PTR(4); + + byte pi[16]; // 16 palette indices + + for (int8 i = numPixels - 1; i >= 0; i--) { + pi[numPixels - 1 - i] = (stream->readByte() >> ((i * bpp) & 0x07)) & ((1 << bpp) - 1); + + // FIXME: Is this right? + //stream_ptr += ((i & ((num_pixels>>2)-1)) == 0); + if ((i & ((numPixels >> 2) - 1)) == 0) + stream->readByte(); + } + + CHECK_PIXEL_PTR(rleCode * numPixels); + + while (rleCode--) + for (byte i = 0; i < numPixels; i++) + rgb[pixelPtr++] = pi[i]; + } else { + // copy the same pixel directly to output 4 times + rleCode *= 4; + CHECK_STREAM_PTR(rleCode); + CHECK_PIXEL_PTR(rleCode * (numPixels >> 2)); + + while (rleCode--) { + byte temp = stream->readByte(); + if (bpp == 4) { + rgb[pixelPtr++] = (temp >> 4) & 0x0f; + rgb[pixelPtr++] = temp & 0x0f; + } else { + rgb[pixelPtr++] = (temp >> 6) & 0x03; + rgb[pixelPtr++] = (temp >> 4) & 0x03; + rgb[pixelPtr++] = (temp >> 2) & 0x03; + rgb[pixelPtr++] = temp & 0x03; + } + } + } + } + + rowPtr += _surface->w; + } +} + +void QTRLEDecoder::decode8(Common::SeekableReadStream *stream, uint32 rowPtr, uint32 linesToChange) { + uint32 pixelPtr = 0; + byte *rgb = (byte *)_surface->pixels; + + while (linesToChange--) { + CHECK_STREAM_PTR(2); + pixelPtr = rowPtr + 4 * (stream->readByte() - 1); + + for (int8 rleCode = stream->readSByte(); rleCode != -1; rleCode = stream->readSByte()) { + if (rleCode == 0) { + // there's another skip code in the stream + CHECK_STREAM_PTR(1); + pixelPtr += 4 * (stream->readByte() - 1); + } else if (rleCode < 0) { + // decode the run length code + rleCode = -rleCode; + + // get the next 4 bytes from the stream, treat them as palette indices, and output them rleCode times + CHECK_STREAM_PTR(4); + + byte pi[4]; // 4 palette indexes + + for (byte i = 0; i < 4; i++) + pi[i] = stream->readByte(); + + CHECK_PIXEL_PTR(rleCode * 4); + + while (rleCode--) + for (byte i = 0; i < 4; i++) + rgb[pixelPtr++] = pi[i]; + } else { + // copy the same pixel directly to output 4 times + rleCode *= 4; + CHECK_STREAM_PTR(rleCode); + CHECK_PIXEL_PTR(rleCode); + + while (rleCode--) + rgb[pixelPtr++] = stream->readByte(); + } + } + + rowPtr += _surface->w; + } +} + +void QTRLEDecoder::decode16(Common::SeekableReadStream *stream, uint32 rowPtr, uint32 linesToChange) { + uint32 pixelPtr = 0; + OverlayColor *rgb = (OverlayColor *)_surface->pixels; + + while (linesToChange--) { + CHECK_STREAM_PTR(2); + pixelPtr = rowPtr + stream->readByte() - 1; + + for (int8 rleCode = stream->readSByte(); rleCode != -1; rleCode = stream->readSByte()) { + if (rleCode == 0) { + // there's another skip code in the stream + CHECK_STREAM_PTR(1); + pixelPtr += stream->readByte() - 1; + } else if (rleCode < 0) { + // decode the run length code + rleCode = -rleCode; + CHECK_STREAM_PTR(2); + + uint16 rgb16 = stream->readUint16BE(); + + CHECK_PIXEL_PTR(rleCode); + + while (rleCode--) { + // Convert from RGB555 to the format specified by the Overlay + byte r = 0, g = 0, b = 0; + colorToRGB<ColorMasks<555> >(rgb16, r, g, b); + rgb[pixelPtr++] = _pixelFormat.RGBToColor(r, g, b); + } + } else { + CHECK_STREAM_PTR(rleCode * 2); + CHECK_PIXEL_PTR(rleCode); + + // copy pixels directly to output + while (rleCode--) { + uint16 rgb16 = stream->readUint16BE(); + + // Convert from RGB555 to the format specified by the Overlay + byte r = 0, g = 0, b = 0; + colorToRGB<ColorMasks<555> >(rgb16, r, g, b); + rgb[pixelPtr++] = _pixelFormat.RGBToColor(r, g, b); + } + } + } + + rowPtr += _surface->w; + } +} + +void QTRLEDecoder::decode24(Common::SeekableReadStream *stream, uint32 rowPtr, uint32 linesToChange) { + uint32 pixelPtr = 0; + OverlayColor *rgb = (OverlayColor *)_surface->pixels; + + while (linesToChange--) { + CHECK_STREAM_PTR(2); + pixelPtr = rowPtr + stream->readByte() - 1; + + for (int8 rleCode = stream->readSByte(); rleCode != -1; rleCode = stream->readSByte()) { + if (rleCode == 0) { + // there's another skip code in the stream + CHECK_STREAM_PTR(1); + pixelPtr += stream->readByte() - 1; + } else if (rleCode < 0) { + // decode the run length code + rleCode = -rleCode; + + CHECK_STREAM_PTR(3); + + byte r = stream->readByte(); + byte g = stream->readByte(); + byte b = stream->readByte(); + + CHECK_PIXEL_PTR(rleCode); + + while (rleCode--) + rgb[pixelPtr++] = _pixelFormat.RGBToColor(r, g, b); + } else { + CHECK_STREAM_PTR(rleCode * 3); + CHECK_PIXEL_PTR(rleCode); + + // copy pixels directly to output + while (rleCode--) { + byte r = stream->readByte(); + byte g = stream->readByte(); + byte b = stream->readByte(); + rgb[pixelPtr++] = _pixelFormat.RGBToColor(r, g, b); + } + } + } + + rowPtr += _surface->w; + } +} + +void QTRLEDecoder::decode32(Common::SeekableReadStream *stream, uint32 rowPtr, uint32 linesToChange) { + uint32 pixelPtr = 0; + OverlayColor *rgb = (OverlayColor *)_surface->pixels; + + while (linesToChange--) { + CHECK_STREAM_PTR(2); + pixelPtr = rowPtr + stream->readByte() - 1; + + for (int8 rleCode = stream->readSByte(); rleCode != -1; rleCode = stream->readSByte()) { + if (rleCode == 0) { + // there's another skip code in the stream + CHECK_STREAM_PTR(1); + pixelPtr += stream->readByte() - 1; + } else if (rleCode < 0) { + // decode the run length code + rleCode = -rleCode; + + CHECK_STREAM_PTR(4); + + byte a = stream->readByte(); + byte r = stream->readByte(); + byte g = stream->readByte(); + byte b = stream->readByte(); + + CHECK_PIXEL_PTR(rleCode); + + while (rleCode--) + rgb[pixelPtr++] = _pixelFormat.ARGBToColor(a, r, g, b); + } else { + CHECK_STREAM_PTR(rleCode * 4); + CHECK_PIXEL_PTR(rleCode); + + // copy pixels directly to output + while (rleCode--) { + byte a = stream->readByte(); + byte r = stream->readByte(); + byte g = stream->readByte(); + byte b = stream->readByte(); + rgb[pixelPtr++] = _pixelFormat.ARGBToColor(a, r, g, b); + } + } + } + + rowPtr += _surface->w; + } +} + +Surface *QTRLEDecoder::decodeImage(Common::SeekableReadStream *stream) { + uint16 start_line = 0; + uint16 height = _surface->h; + + // check if this frame is even supposed to change + if (stream->size() < 8) + return _surface; + + // start after the chunk size + stream->readUint32BE(); + + // fetch the header + uint16 header = stream->readUint16BE(); + + // if a header is present, fetch additional decoding parameters + if (header & 8) { + if(stream->size() < 14) + return _surface; + start_line = stream->readUint16BE(); + stream->readUint16BE(); // Unknown + height = stream->readUint16BE(); + stream->readUint16BE(); // Unknown + } + + uint32 row_ptr = _surface->w * start_line; + + switch (_bitsPerPixel) { + case 1: + case 33: + decode1(stream, row_ptr, height); + break; + case 2: + case 34: + decode2_4(stream, row_ptr, height, 2); + break; + case 4: + case 36: + decode2_4(stream, row_ptr, height, 4); + break; + case 8: + case 40: + decode8(stream, row_ptr, height); + break; + case 16: + decode16(stream, row_ptr, height); + break; + case 24: + decode24(stream, row_ptr, height); + break; + case 32: + decode32(stream, row_ptr, height); + break; + default: + error ("Unsupported bits per pixel %d", _bitsPerPixel); + } + + return _surface; +} + +QTRLEDecoder::~QTRLEDecoder() { + _surface->free(); +} + +} // End of namespace Graphics diff --git a/graphics/video/codecs/qtrle.h b/graphics/video/codecs/qtrle.h new file mode 100644 index 0000000000..efbef14411 --- /dev/null +++ b/graphics/video/codecs/qtrle.h @@ -0,0 +1,58 @@ +/* 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. + * + * $URL$ + * $Id$ + * + */ + +#ifndef GRAPHICS_VIDEO_QTRLE_H +#define GRAPHICS_VIDEO_QTRLE_H + +#include "graphics/pixelformat.h" +#include "graphics/video/codecs/codec.h" + +namespace Graphics { + +class QTRLEDecoder : public Codec { +public: + QTRLEDecoder(uint16 width, uint16 height, byte bitsPerPixel); + ~QTRLEDecoder(); + + Surface *decodeImage(Common::SeekableReadStream *stream); + PixelFormat getPixelFormat() const { return _pixelFormat; } + +private: + byte _bitsPerPixel; + + Surface *_surface; + PixelFormat _pixelFormat; + + void decode1(Common::SeekableReadStream *stream, uint32 rowPtr, uint32 linesToChange); + void decode2_4(Common::SeekableReadStream *stream, uint32 rowPtr, uint32 linesToChange, byte bpp); + void decode8(Common::SeekableReadStream *stream, uint32 rowPtr, uint32 linesToChange); + void decode16(Common::SeekableReadStream *stream, uint32 rowPtr, uint32 linesToChange); + void decode24(Common::SeekableReadStream *stream, uint32 rowPtr, uint32 linesToChange); + void decode32(Common::SeekableReadStream *stream, uint32 rowPtr, uint32 linesToChange); +}; + +} // End of namespace Graphics + +#endif diff --git a/graphics/video/codecs/rpza.cpp b/graphics/video/codecs/rpza.cpp new file mode 100644 index 0000000000..f0ed72e730 --- /dev/null +++ b/graphics/video/codecs/rpza.cpp @@ -0,0 +1,208 @@ +/* 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 off ffmpeg's RPZA decoder + +#include "graphics/video/codecs/rpza.h" + +#include "common/system.h" +#include "graphics/colormasks.h" + +namespace Graphics { + +RPZADecoder::RPZADecoder(uint16 width, uint16 height) : Codec() { + _pixelFormat = g_system->getScreenFormat(); + + // We need to increase the surface size to a multiple of 4 + uint16 wMod = width % 4; + if(wMod != 0) + width += 4 - wMod; + + debug(2, "RPZA corrected width: %d", width); + + _surface = new Surface(); + _surface->create(width, height, _pixelFormat.bytesPerPixel); +} + +#define ADVANCE_BLOCK() \ + pixelPtr += 4; \ + if (pixelPtr >= _surface->w) { \ + pixelPtr = 0; \ + rowPtr += _surface->w * 4; \ + } \ + totalBlocks--; \ + if (totalBlocks < 0) \ + error("block counter just went negative (this should not happen)") \ + +// Convert from RGB555 to the format specified by the screen +#define PUT_PIXEL(color) \ + if ((int32)blockPtr < _surface->w * _surface->h) { \ + byte r = 0, g = 0, b = 0; \ + colorToRGB<ColorMasks<555> >(color, r, g, b); \ + if (_pixelFormat.bytesPerPixel == 2) \ + *((uint16 *)_surface->pixels + blockPtr) = _pixelFormat.RGBToColor(r, g, b); \ + else \ + *((uint32 *)_surface->pixels + blockPtr) = _pixelFormat.RGBToColor(r, g, b); \ + } \ + blockPtr++ + +Surface *RPZADecoder::decodeImage(Common::SeekableReadStream *stream) { + uint16 colorA = 0, colorB = 0; + uint16 color4[4]; + + uint32 rowPtr = 0; + uint32 pixelPtr = 0; + uint32 blockPtr = 0; + uint32 rowInc = _surface->w - 4; + uint16 ta; + uint16 tb; + + // First byte is always 0xe1. Warn if it's different + byte firstByte = stream->readByte(); + if (firstByte != 0xe1) + warning("First RPZA chunk byte is 0x%02x instead of 0xe1", firstByte); + + // Get chunk size, ingnoring first byte + uint32 chunkSize = stream->readUint16BE() << 8; + chunkSize += stream->readByte(); + + // If length mismatch use size from MOV file and try to decode anyway + if (chunkSize != (uint32)stream->size()) { + warning("MOV chunk size != encoded chunk size; using MOV chunk size"); + chunkSize = stream->size(); + } + + // Number of 4x4 blocks in frame + int32 totalBlocks = ((_surface->w + 3) / 4) * ((_surface->h + 3) / 4); + + // Process chunk data + while ((uint32)stream->pos() < chunkSize) { + byte opcode = stream->readByte(); // Get opcode + byte numBlocks = (opcode & 0x1f) + 1; // Extract block counter from opcode + + // If opcode MSbit is 0, we need more data to decide what to do + if ((opcode & 0x80) == 0) { + colorA = (opcode << 8) | stream->readByte(); + opcode = 0; + if (stream->readByte() & 0x80) { + // Must behave as opcode 110xxxxx, using colorA computed + // above. Use fake opcode 0x20 to enter switch block at + // the right place + opcode = 0x20; + numBlocks = 1; + } + stream->seek(-1, SEEK_CUR); + } + + switch (opcode & 0xe0) { + case 0x80: // Skip blocks + while (numBlocks--) { + ADVANCE_BLOCK(); + } + break; + case 0xa0: // Fill blocks with one color + colorA = stream->readUint16BE(); + while (numBlocks--) { + blockPtr = rowPtr + pixelPtr; + for (byte pixel_y = 0; pixel_y < 4; pixel_y++) { + for (byte pixel_x = 0; pixel_x < 4; pixel_x++) { + PUT_PIXEL(colorA); + } + blockPtr += rowInc; + } + ADVANCE_BLOCK(); + } + break; + + // Fill blocks with 4 colors + case 0xc0: + colorA = stream->readUint16BE(); + case 0x20: + colorB = stream->readUint16BE(); + + // Sort out the colors + color4[0] = colorB; + color4[1] = 0; + color4[2] = 0; + color4[3] = colorA; + + // Red components + ta = (colorA >> 10) & 0x1F; + tb = (colorB >> 10) & 0x1F; + color4[1] |= ((11 * ta + 21 * tb) >> 5) << 10; + color4[2] |= ((21 * ta + 11 * tb) >> 5) << 10; + + // Green components + ta = (colorA >> 5) & 0x1F; + tb = (colorB >> 5) & 0x1F; + color4[1] |= ((11 * ta + 21 * tb) >> 5) << 5; + color4[2] |= ((21 * ta + 11 * tb) >> 5) << 5; + + // Blue components + ta = colorA & 0x1F; + tb = colorB & 0x1F; + color4[1] |= ((11 * ta + 21 * tb) >> 5); + color4[2] |= ((21 * ta + 11 * tb) >> 5); + + while (numBlocks--) { + blockPtr = rowPtr + pixelPtr; + for (byte pixel_y = 0; pixel_y < 4; pixel_y++) { + byte index = stream->readByte(); + for (byte pixel_x = 0; pixel_x < 4; pixel_x++){ + byte idx = (index >> (2 * (3 - pixel_x))) & 0x03; + PUT_PIXEL(color4[idx]); + } + blockPtr += rowInc; + } + ADVANCE_BLOCK(); + } + break; + + // Fill block with 16 colors + case 0x00: + blockPtr = rowPtr + pixelPtr; + for (byte pixel_y = 0; pixel_y < 4; pixel_y++) { + for (byte pixel_x = 0; pixel_x < 4; pixel_x++){ + // We already have color of upper left pixel + if (pixel_y != 0 || pixel_x != 0) + colorA = stream->readUint16BE(); + + PUT_PIXEL(colorA); + } + blockPtr += rowInc; + } + ADVANCE_BLOCK(); + break; + + // Unknown opcode + default: + error("Unknown opcode %02x in rpza chunk", opcode); + } + } + + return _surface; +} + +} // End of namespace Graphics diff --git a/graphics/video/codecs/rpza.h b/graphics/video/codecs/rpza.h new file mode 100644 index 0000000000..e6d32feb72 --- /dev/null +++ b/graphics/video/codecs/rpza.h @@ -0,0 +1,49 @@ +/* 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. + * + * $URL$ + * $Id$ + * + */ + +#ifndef GRAPHICS_VIDEO_RPZA_H +#define GRAPHICS_VIDEO_RPZA_H + +#include "graphics/pixelformat.h" +#include "graphics/video/codecs/codec.h" + +namespace Graphics { + +class RPZADecoder : public Codec { +public: + RPZADecoder(uint16 width, uint16 height); + ~RPZADecoder() { delete _surface; } + + Surface *decodeImage(Common::SeekableReadStream *stream); + PixelFormat getPixelFormat() const { return _pixelFormat; } + +private: + Surface *_surface; + PixelFormat _pixelFormat; +}; + +} // End of namespace Graphics + +#endif diff --git a/graphics/video/codecs/smc.cpp b/graphics/video/codecs/smc.cpp new file mode 100644 index 0000000000..4661e3dc84 --- /dev/null +++ b/graphics/video/codecs/smc.cpp @@ -0,0 +1,385 @@ +/* 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 off ffmpeg's SMC decoder + +#include "graphics/video/codecs/smc.h" + +namespace Graphics { + +#define GET_BLOCK_COUNT() \ + (opcode & 0x10) ? (1 + stream->readByte()) : 1 + (opcode & 0x0F); + +#define ADVANCE_BLOCK() \ +{ \ + pixelPtr += 4; \ + if (pixelPtr >= _surface->w) { \ + pixelPtr = 0; \ + rowPtr += _surface->w * 4; \ + } \ + totalBlocks--; \ + if (totalBlocks < 0) { \ + warning("block counter just went negative (this should not happen)"); \ + return _surface; \ + } \ +} + +SMCDecoder::SMCDecoder(uint16 width, uint16 height) { + _surface = new Graphics::Surface(); + _surface->create(width, height, 1); +} + +Graphics::Surface *SMCDecoder::decodeImage(Common::SeekableReadStream *stream) { + byte *pixels = (byte *)_surface->pixels; + + uint32 numBlocks = 0; + uint32 colorFlags = 0; + uint32 colorFlagsA = 0; + uint32 colorFlagsB = 0; + + const uint16 rowInc = _surface->w - 4; + int32 rowPtr = 0; + int32 pixelPtr = 0; + uint32 blockPtr = 0; + uint32 prevBlockPtr = 0; + uint32 prevBlockPtr1 = 0, prevBlockPtr2 = 0; + byte prevBlockFlag = false; + byte pixel = 0; + + uint32 colorPairIndex = 0; + uint32 colorQuadIndex = 0; + uint32 colorOctetIndex = 0; + uint32 colorTableIndex = 0; // indices to color pair, quad, or octet tables + + int32 chunkSize = stream->readUint32BE() & 0x00FFFFFF; + if (chunkSize != stream->size()) + warning("MOV chunk size != SMC chunk size (%d != %d); ignoring SMC chunk size", chunkSize, stream->size()); + + int32 totalBlocks = ((_surface->w + 3) / 4) * ((_surface->h + 3) / 4); + + // traverse through the blocks + while (totalBlocks != 0) { + // sanity checks + + // make sure stream ptr hasn't gone out of bounds + if (stream->pos() > stream->size()) { + warning("SMC decoder just went out of bounds (stream ptr = %d, chunk size = %d)", stream->pos(), stream->size()); + return _surface; + } + + // make sure the row pointer hasn't gone wild + if (rowPtr >= _surface->w * _surface->h) { + warning("SMC decoder just went out of bounds (row ptr = %d, size = %d)", rowPtr, _surface->w * _surface->h); + return _surface; + } + + byte opcode = stream->readByte(); + + switch (opcode & 0xF0) { + // skip n blocks + case 0x00: + case 0x10: + numBlocks = GET_BLOCK_COUNT(); + while (numBlocks--) { + ADVANCE_BLOCK(); + } + break; + + // repeat last block n times + case 0x20: + case 0x30: + numBlocks = GET_BLOCK_COUNT(); + + // sanity check + if (rowPtr == 0 && pixelPtr == 0) { + warning("encountered repeat block opcode (%02X) but no blocks rendered yet", opcode & 0xF0); + break; + } + + // figure out where the previous block started + if (pixelPtr == 0) + prevBlockPtr1 = (rowPtr - _surface->w * 4) + _surface->w - 4; + else + prevBlockPtr1 = rowPtr + pixelPtr - 4; + + while (numBlocks--) { + blockPtr = rowPtr + pixelPtr; + prevBlockPtr = prevBlockPtr1; + for (byte y = 0; y < 4; y++) { + for (byte x = 0; x < 4; x++) + pixels[blockPtr++] = pixels[prevBlockPtr++]; + blockPtr += rowInc; + prevBlockPtr += rowInc; + } + ADVANCE_BLOCK(); + } + break; + + // repeat previous pair of blocks n times + case 0x40: + case 0x50: + numBlocks = GET_BLOCK_COUNT(); + numBlocks *= 2; + + // sanity check + if (rowPtr == 0 && pixelPtr < 2 * 4) { + warning("encountered repeat block opcode (%02X) but not enough blocks rendered yet", opcode & 0xF0); + break; + } + + // figure out where the previous 2 blocks started + if (pixelPtr == 0) + prevBlockPtr1 = (rowPtr - _surface->w * 4) + _surface->w - 4 * 2; + else if (pixelPtr == 4) + prevBlockPtr1 = (rowPtr - _surface->w * 4) + rowInc; + else + prevBlockPtr1 = rowPtr + pixelPtr - 4 * 2; + + if (pixelPtr == 0) + prevBlockPtr2 = (rowPtr - _surface->w * 4) + rowInc; + else + prevBlockPtr2 = rowPtr + pixelPtr - 4; + + prevBlockFlag = 0; + while (numBlocks--) { + blockPtr = rowPtr + pixelPtr; + + if (prevBlockFlag) + prevBlockPtr = prevBlockPtr2; + else + prevBlockPtr = prevBlockPtr1; + + prevBlockFlag = !prevBlockFlag; + + for (byte y = 0; y < 4; y++) { + for (byte x = 0; x < 4; x++) + pixels[blockPtr++] = pixels[prevBlockPtr++]; + + blockPtr += rowInc; + prevBlockPtr += rowInc; + } + ADVANCE_BLOCK(); + } + break; + + // 1-color block encoding + case 0x60: + case 0x70: + numBlocks = GET_BLOCK_COUNT(); + pixel = stream->readByte(); + + while (numBlocks--) { + blockPtr = rowPtr + pixelPtr; + for (byte y = 0; y < 4; y++) { + for (byte x = 0; x < 4; x++) + pixels[blockPtr++] = pixel; + + blockPtr += rowInc; + } + ADVANCE_BLOCK(); + } + break; + + // 2-color block encoding + case 0x80: + case 0x90: + numBlocks = (opcode & 0x0F) + 1; + + // figure out which color pair to use to paint the 2-color block + if ((opcode & 0xF0) == 0x80) { + // fetch the next 2 colors from bytestream and store in next + // available entry in the color pair table + for (byte i = 0; i < CPAIR; i++) { + pixel = stream->readByte(); + colorTableIndex = CPAIR * colorPairIndex + i; + _colorPairs[colorTableIndex] = pixel; + } + + // this is the base index to use for this block + colorTableIndex = CPAIR * colorPairIndex; + colorPairIndex++; + + // wraparound + if (colorPairIndex == COLORS_PER_TABLE) + colorPairIndex = 0; + } else + colorTableIndex = CPAIR * stream->readByte(); + + while (numBlocks--) { + colorFlags = stream->readUint16BE(); + uint16 flagMask = 0x8000; + blockPtr = rowPtr + pixelPtr; + for (byte y = 0; y < 4; y++) { + for (byte x = 0; x < 4; x++) { + if (colorFlags & flagMask) + pixel = colorTableIndex + 1; + else + pixel = colorTableIndex; + + flagMask >>= 1; + pixels[blockPtr++] = _colorPairs[pixel]; + } + + blockPtr += rowInc; + } + ADVANCE_BLOCK(); + } + break; + + // 4-color block encoding + case 0xA0: + case 0xB0: + numBlocks = (opcode & 0x0F) + 1; + + // figure out which color quad to use to paint the 4-color block + if ((opcode & 0xF0) == 0xA0) { + // fetch the next 4 colors from bytestream and store in next + // available entry in the color quad table + for (byte i = 0; i < CQUAD; i++) { + pixel = stream->readByte(); + colorTableIndex = CQUAD * colorQuadIndex + i; + _colorQuads[colorTableIndex] = pixel; + } + + // this is the base index to use for this block + colorTableIndex = CQUAD * colorQuadIndex; + colorQuadIndex++; + + // wraparound + if (colorQuadIndex == COLORS_PER_TABLE) + colorQuadIndex = 0; + } else + colorTableIndex = CQUAD * stream->readByte(); + + while (numBlocks--) { + colorFlags = stream->readUint32BE(); + + // flag mask actually acts as a bit shift count here + byte flagMask = 30; + blockPtr = rowPtr + pixelPtr; + + for (byte y = 0; y < 4; y++) { + for (byte x = 0; x < 4; x++) { + pixel = colorTableIndex + ((colorFlags >> flagMask) & 0x03); + flagMask -= 2; + pixels[blockPtr++] = _colorQuads[pixel]; + } + blockPtr += rowInc; + } + ADVANCE_BLOCK(); + } + break; + + // 8-color block encoding + case 0xC0: + case 0xD0: + numBlocks = (opcode & 0x0F) + 1; + + // figure out which color octet to use to paint the 8-color block + if ((opcode & 0xF0) == 0xC0) { + // fetch the next 8 colors from bytestream and store in next + // available entry in the color octet table + for (byte i = 0; i < COCTET; i++) { + pixel = stream->readByte(); + colorTableIndex = COCTET * colorOctetIndex + i; + _colorOctets[colorTableIndex] = pixel; + } + + // this is the base index to use for this block + colorTableIndex = COCTET * colorOctetIndex; + colorOctetIndex++; + + // wraparound + if (colorOctetIndex == COLORS_PER_TABLE) + colorOctetIndex = 0; + } else + colorTableIndex = COCTET * stream->readByte(); + + while (numBlocks--) { + /* + For this input of 6 hex bytes: + 01 23 45 67 89 AB + Mangle it to this output: + flags_a = xx012456, flags_b = xx89A37B + */ + + // build the color flags + byte flagData[6]; + stream->read(flagData, 6); + + colorFlagsA = ((READ_BE_UINT16(flagData) & 0xFFF0) << 8) | (READ_BE_UINT16(flagData + 2) >> 4); + colorFlagsB = ((READ_BE_UINT16(flagData + 4) & 0xFFF0) << 8) | ((flagData[1] & 0xF) << 8) | + ((flagData[3] & 0xF) << 4) | (flagData[5] & 0xf); + + colorFlags = colorFlagsA; + + // flag mask actually acts as a bit shift count here + byte flagMask = 21; + blockPtr = rowPtr + pixelPtr; + for (byte y = 0; y < 4; y++) { + // reload flags at third row (iteration y == 2) + if (y == 2) { + colorFlags = colorFlagsB; + flagMask = 21; + } + + for (byte x = 0; x < 4; x++) { + pixel = colorTableIndex + ((colorFlags >> flagMask) & 0x07); + flagMask -= 3; + pixels[blockPtr++] = _colorOctets[pixel]; + } + + blockPtr += rowInc; + } + ADVANCE_BLOCK(); + } + break; + + // 16-color block encoding (every pixel is a different color) + case 0xE0: + numBlocks = (opcode & 0x0F) + 1; + + while (numBlocks--) { + blockPtr = rowPtr + pixelPtr; + for (byte y = 0; y < 4; y++) { + for (byte x = 0; x < 4; x++) + pixels[blockPtr++] = stream->readByte(); + + blockPtr += rowInc; + } + ADVANCE_BLOCK(); + } + break; + + case 0xF0: + warning("0xF0 opcode seen in SMC chunk (contact the developers)"); + break; + } + } + + return _surface; +} + +} // End of namespace Graphics diff --git a/graphics/video/codecs/smc.h b/graphics/video/codecs/smc.h new file mode 100644 index 0000000000..2d4355a83e --- /dev/null +++ b/graphics/video/codecs/smc.h @@ -0,0 +1,59 @@ +/* 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. + * + * $URL$ + * $Id$ + * + */ + +#ifndef GRAPHICS_VIDEO_SMC_H +#define GRAPHICS_VIDEO_SMC_H + +#include "graphics/video/codecs/codec.h" + +namespace Graphics { + +enum { + CPAIR = 2, + CQUAD = 4, + COCTET = 8, + COLORS_PER_TABLE = 256 +}; + +class SMCDecoder : public Codec { +public: + SMCDecoder(uint16 width, uint16 height); + ~SMCDecoder() { delete _surface; } + + Surface *decodeImage(Common::SeekableReadStream *stream); + PixelFormat getPixelFormat() const { return PixelFormat::createFormatCLUT8(); } + +private: + Surface *_surface; + + // SMC color tables + byte _colorPairs[COLORS_PER_TABLE * CPAIR]; + byte _colorQuads[COLORS_PER_TABLE * CQUAD]; + byte _colorOctets[COLORS_PER_TABLE * COCTET]; +}; + +} // End of namespace Graphics + +#endif |