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Diffstat (limited to 'engines/mohawk/video/cinepak.cpp')
-rw-r--r-- | engines/mohawk/video/cinepak.cpp | 286 |
1 files changed, 0 insertions, 286 deletions
diff --git a/engines/mohawk/video/cinepak.cpp b/engines/mohawk/video/cinepak.cpp deleted file mode 100644 index 2ffe6869ae..0000000000 --- a/engines/mohawk/video/cinepak.cpp +++ /dev/null @@ -1,286 +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. - * - * $URL$ - * $Id$ - * - */ - -#include "mohawk/video/cinepak.h" - -#include "common/system.h" -#include "graphics/conversion.h" // For YUV2RGB - -// Code here partially based off of ffmpeg ;) - -namespace Mohawk { - -#define PUT_PIXEL(offset, lum, u, v) \ - Graphics::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() : Graphics::Codec() { - _curFrame.surface = NULL; - _curFrame.strips = NULL; - _y = 0; - _pixelFormat = g_system->getScreenFormat(); - - // We're going to have to dither if we're running in 8bpp. - // We'll take RGBA8888 for best color performance in this case. - if (_pixelFormat.bytesPerPixel == 1) - _pixelFormat = Graphics::PixelFormat(4, 8, 8, 8, 8, 24, 16, 8, 0); -} - -CinepakDecoder::~CinepakDecoder() { - if (_curFrame.surface) - _curFrame.surface->free(); - delete[] _curFrame.strips; -} - -Graphics::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 Graphics::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 Mohawk |