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Diffstat (limited to 'graphics/video/codecs/msvideo1.cpp')
| -rw-r--r-- | graphics/video/codecs/msvideo1.cpp | 140 |
1 files changed, 0 insertions, 140 deletions
diff --git a/graphics/video/codecs/msvideo1.cpp b/graphics/video/codecs/msvideo1.cpp deleted file mode 100644 index 176efc037f..0000000000 --- a/graphics/video/codecs/msvideo1.cpp +++ /dev/null @@ -1,140 +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 off ffmpeg's msvideo.cpp - -#include "graphics/video/codecs/msvideo1.h" -#include "common/stream.h" - -namespace Graphics { - -#define CHECK_STREAM_PTR(n) \ - if ((stream->pos() + n) > stream->size() ) { \ - warning ("MS Video-1: Stream out of bounds (%d >= %d)", stream->pos() + n, stream->size()); \ - return; \ - } - -MSVideo1Decoder::MSVideo1Decoder(uint16 width, uint16 height, byte bitsPerPixel) : Codec() { - _surface = new Graphics::Surface(); - _surface->create(width, height, (bitsPerPixel == 8) ? 1 : 2); - _bitsPerPixel = bitsPerPixel; -} - -MSVideo1Decoder::~MSVideo1Decoder() { - _surface->free(); - delete _surface; -} - -void MSVideo1Decoder::decode8(Common::SeekableReadStream *stream) { - byte colors[8]; - byte *pixels = (byte *)_surface->pixels; - uint16 stride = _surface->w; - - int skipBlocks = 0; - uint16 blocks_wide = _surface->w / 4; - uint16 blocks_high = _surface->h / 4; - uint32 totalBlocks = blocks_wide * blocks_high; - uint32 blockInc = 4; - uint16 rowDec = stride + 4; - - for (uint16 block_y = blocks_high; block_y > 0; block_y--) { - uint32 blockPtr = (block_y * 4 - 1) * stride; - for (uint16 block_x = blocks_wide; block_x > 0; block_x--) { - // check if this block should be skipped - if (skipBlocks > 0) { - blockPtr += blockInc; - skipBlocks--; - totalBlocks--; - continue; - } - - uint32 pixelPtr = blockPtr; - - /* get the next two bytes in the encoded data stream */ - CHECK_STREAM_PTR(2); - byte byte_a = stream->readByte(); - byte byte_b = stream->readByte(); - - /* check if the decode is finished */ - if (byte_a == 0 && byte_b == 0 && totalBlocks == 0) { - return; - } else if ((byte_b & 0xFC) == 0x84) { - // skip code, but don't count the current block - skipBlocks = ((byte_b - 0x84) << 8) + byte_a - 1; - } else if (byte_b < 0x80) { - // 2-color encoding - uint16 flags = (byte_b << 8) | byte_a; - - CHECK_STREAM_PTR(2); - colors[0] = stream->readByte(); - colors[1] = stream->readByte(); - - for (byte pixel_y = 0; pixel_y < 4; pixel_y++) { - for (byte pixel_x = 0; pixel_x < 4; pixel_x++, flags >>= 1) - pixels[pixelPtr++] = colors[(flags & 0x1) ^ 1]; - pixelPtr -= rowDec; - } - } else if (byte_b >= 0x90) { - // 8-color encoding - uint16 flags = (byte_b << 8) | byte_a; - - CHECK_STREAM_PTR(8); - for (byte i = 0; i < 8; i++) - colors[i] = stream->readByte(); - - for (byte pixel_y = 0; pixel_y < 4; pixel_y++) { - for (byte pixel_x = 0; pixel_x < 4; pixel_x++, flags >>= 1) - pixels[pixelPtr++] = colors[((pixel_y & 0x2) << 1) + (pixel_x & 0x2) + ((flags & 0x1) ^ 1)]; - pixelPtr -= rowDec; - } - } else { - // 1-color encoding - colors[0] = byte_a; - - for (byte pixel_y = 0; pixel_y < 4; pixel_y++) { - for (byte pixel_x = 0; pixel_x < 4; pixel_x++) - pixels[pixelPtr++] = colors[0]; - pixelPtr -= rowDec; - } - } - - blockPtr += blockInc; - totalBlocks--; - } - } -} - -const Surface *MSVideo1Decoder::decodeImage(Common::SeekableReadStream *stream) { - if (_bitsPerPixel == 8) - decode8(stream); - else { - // decode16(stream); - error ("Unhandled MS Video-1 16bpp encoding"); - } - - return _surface; -} - -} // End of namespace JMP |