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-rw-r--r--graphics/video/codecs/cinepak.cpp292
1 files changed, 0 insertions, 292 deletions
diff --git a/graphics/video/codecs/cinepak.cpp b/graphics/video/codecs/cinepak.cpp
deleted file mode 100644
index 3264810908..0000000000
--- a/graphics/video/codecs/cinepak.cpp
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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 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) \
- if (_pixelFormat.bytesPerPixel != 1) { \
- 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); \
- } else \
- *((byte *)_curFrame.surface->pixels + offset) = lum
-
-CinepakDecoder::CinepakDecoder(int bitsPerPixel) : Codec() {
- _curFrame.surface = NULL;
- _curFrame.strips = NULL;
- _y = 0;
-
- if (bitsPerPixel == 8)
- _pixelFormat = PixelFormat::createFormatCLUT8();
- else
- _pixelFormat = g_system->getScreenFormat();
-}
-
-CinepakDecoder::~CinepakDecoder() {
- if (_curFrame.surface) {
- _curFrame.surface->free();
- delete _curFrame.surface;
- }
-
- delete[] _curFrame.strips;
-}
-
-const 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);
-
- // 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();
- }
-
- 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
-
- // 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. For greyscale, default us to
- // 128 for both u and v.
- 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
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