580 lines
18 KiB
C
580 lines
18 KiB
C
/*
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* Microsoft Video-1 Decoder
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* Copyright (C) 2003 the ffmpeg project
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*
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* Portions Copyright (C) 2004 Mike McCormack for CodeWeavers
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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/**
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* @file msvideo1.c
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* Microsoft Video-1 Decoder by Mike Melanson (melanson@pcisys.net)
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* For more information about the MS Video-1 format, visit:
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* http://www.pcisys.net/~melanson/codecs/
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*
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* This decoder outputs either PAL8 or RGB555 data, depending on the
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* whether a RGB palette was passed through palctrl;
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* if it's present, then the data is PAL8; RGB555 otherwise.
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*/
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#include <stdarg.h>
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#include "windef.h"
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#include "winbase.h"
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#include "wingdi.h"
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#include "winuser.h"
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#include "commdlg.h"
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#include "vfw.h"
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#include "mmsystem.h"
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#include "msvidc32_private.h"
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#include "wine/debug.h"
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WINE_DEFAULT_DEBUG_CHANNEL(msvidc32);
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static HINSTANCE MSVIDC32_hModule;
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#define CRAM_MAGIC mmioFOURCC('C', 'R', 'A', 'M')
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#define MSVC_MAGIC mmioFOURCC('M', 'S', 'V', 'C')
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#define WHAM_MAGIC mmioFOURCC('W', 'H', 'A', 'M')
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#define PALETTE_COUNT 256
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#define LE_16(x) ((((uint8_t*)(x))[1] << 8) | ((uint8_t*)(x))[0])
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/* FIXME - check the stream size */
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#define CHECK_STREAM_PTR(n) \
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if ((stream_ptr + n) > buf_size ) { \
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WARN("stream_ptr out of bounds (%d >= %d)\n", \
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stream_ptr + n, buf_size); \
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return; \
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}
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typedef BYTE uint8_t;
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typedef struct Msvideo1Context {
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DWORD dwMagic;
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int mode_8bit; /* if it's not 8-bit, it's 16-bit */
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} Msvideo1Context;
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static void
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msvideo1_decode_8bit( int width, int height, unsigned char *buf, int buf_size,
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unsigned char *pixels, int stride)
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{
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int block_ptr, pixel_ptr;
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int total_blocks;
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int pixel_x, pixel_y; /* pixel width and height iterators */
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int block_x, block_y; /* block width and height iterators */
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int blocks_wide, blocks_high; /* width and height in 4x4 blocks */
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int block_inc;
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int row_dec;
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/* decoding parameters */
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int stream_ptr;
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unsigned char byte_a, byte_b;
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unsigned short flags;
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int skip_blocks;
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unsigned char colors[8];
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stream_ptr = 0;
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skip_blocks = 0;
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blocks_wide = width / 4;
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blocks_high = height / 4;
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total_blocks = blocks_wide * blocks_high;
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block_inc = 4;
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row_dec = stride + 4;
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for (block_y = blocks_high; block_y > 0; block_y--) {
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block_ptr = ((block_y * 4) - 1) * stride;
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for (block_x = blocks_wide; block_x > 0; block_x--) {
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/* check if this block should be skipped */
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if (skip_blocks) {
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block_ptr += block_inc;
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skip_blocks--;
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total_blocks--;
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continue;
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}
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pixel_ptr = block_ptr;
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/* get the next two bytes in the encoded data stream */
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CHECK_STREAM_PTR(2);
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byte_a = buf[stream_ptr++];
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byte_b = buf[stream_ptr++];
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/* check if the decode is finished */
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if ((byte_a == 0) && (byte_b == 0) && (total_blocks == 0))
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return;
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else if ((byte_b & 0xFC) == 0x84) {
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/* skip code, but don't count the current block */
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skip_blocks = ((byte_b - 0x84) << 8) + byte_a - 1;
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} else if (byte_b < 0x80) {
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/* 2-color encoding */
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flags = (byte_b << 8) | byte_a;
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CHECK_STREAM_PTR(2);
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colors[0] = buf[stream_ptr++];
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colors[1] = buf[stream_ptr++];
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for (pixel_y = 0; pixel_y < 4; pixel_y++) {
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for (pixel_x = 0; pixel_x < 4; pixel_x++, flags >>= 1)
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{
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#if ORIGINAL
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pixels[pixel_ptr++] = colors[(flags & 0x1) ^ 1];
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#else
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pixels[width*(height-(pixel_ptr/width)-1) +
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pixel_ptr%width] =
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colors[(flags & 0x1) ^ 1];
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pixel_ptr++;
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#endif
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}
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pixel_ptr -= row_dec;
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}
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} else if (byte_b >= 0x90) {
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/* 8-color encoding */
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flags = (byte_b << 8) | byte_a;
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CHECK_STREAM_PTR(8);
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memcpy(colors, &buf[stream_ptr], 8);
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stream_ptr += 8;
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for (pixel_y = 0; pixel_y < 4; pixel_y++) {
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for (pixel_x = 0; pixel_x < 4; pixel_x++, flags >>= 1)
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{
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#if ORIGINAL
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pixels[pixel_ptr++] =
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colors[((pixel_y & 0x2) << 1) +
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(pixel_x & 0x2) + ((flags & 0x1) ^ 1)];
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#else
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pixels[width*(height-(pixel_ptr/width)-1) +
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pixel_ptr%width] =
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colors[((pixel_y & 0x2) << 1) +
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(pixel_x & 0x2) + ((flags & 0x1) ^ 1)];
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pixel_ptr++;
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#endif
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}
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pixel_ptr -= row_dec;
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}
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} else {
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/* 1-color encoding */
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colors[0] = byte_a;
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for (pixel_y = 0; pixel_y < 4; pixel_y++) {
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for (pixel_x = 0; pixel_x < 4; pixel_x++)
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{
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#if ORIGINAL
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pixels[pixel_ptr++] = colors[0];
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#else
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pixels[width*(height-(pixel_ptr/width)-1) +
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pixel_ptr%width] = colors[0];
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pixel_ptr++;
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#endif
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}
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pixel_ptr -= row_dec;
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}
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}
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block_ptr += block_inc;
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total_blocks--;
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}
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}
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}
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static void
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msvideo1_decode_16bit( int width, int height, unsigned char *buf, int buf_size,
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unsigned short *pixels, int stride)
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{
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int block_ptr, pixel_ptr;
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int total_blocks;
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int pixel_x, pixel_y; /* pixel width and height iterators */
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int block_x, block_y; /* block width and height iterators */
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int blocks_wide, blocks_high; /* width and height in 4x4 blocks */
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int block_inc;
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int row_dec;
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/* decoding parameters */
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int stream_ptr;
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unsigned char byte_a, byte_b;
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unsigned short flags;
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int skip_blocks;
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unsigned short colors[8];
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stream_ptr = 0;
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skip_blocks = 0;
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blocks_wide = width / 4;
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blocks_high = height / 4;
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total_blocks = blocks_wide * blocks_high;
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block_inc = 4;
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row_dec = stride + 4;
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for (block_y = blocks_high; block_y > 0; block_y--) {
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block_ptr = ((block_y * 4) - 1) * stride;
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for (block_x = blocks_wide; block_x > 0; block_x--) {
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/* check if this block should be skipped */
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if (skip_blocks) {
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block_ptr += block_inc;
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skip_blocks--;
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total_blocks--;
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continue;
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}
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pixel_ptr = block_ptr;
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/* get the next two bytes in the encoded data stream */
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CHECK_STREAM_PTR(2);
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byte_a = buf[stream_ptr++];
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byte_b = buf[stream_ptr++];
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/* check if the decode is finished */
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if ((byte_a == 0) && (byte_b == 0) && (total_blocks == 0)) {
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return;
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} else if ((byte_b & 0xFC) == 0x84) {
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/* skip code, but don't count the current block */
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skip_blocks = ((byte_b - 0x84) << 8) + byte_a - 1;
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} else if (byte_b < 0x80) {
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/* 2- or 8-color encoding modes */
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flags = (byte_b << 8) | byte_a;
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CHECK_STREAM_PTR(4);
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colors[0] = LE_16(&buf[stream_ptr]);
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stream_ptr += 2;
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colors[1] = LE_16(&buf[stream_ptr]);
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stream_ptr += 2;
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if (colors[0] & 0x8000) {
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/* 8-color encoding */
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CHECK_STREAM_PTR(12);
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colors[2] = LE_16(&buf[stream_ptr]);
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stream_ptr += 2;
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colors[3] = LE_16(&buf[stream_ptr]);
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stream_ptr += 2;
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colors[4] = LE_16(&buf[stream_ptr]);
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stream_ptr += 2;
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colors[5] = LE_16(&buf[stream_ptr]);
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stream_ptr += 2;
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colors[6] = LE_16(&buf[stream_ptr]);
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stream_ptr += 2;
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colors[7] = LE_16(&buf[stream_ptr]);
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stream_ptr += 2;
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for (pixel_y = 0; pixel_y < 4; pixel_y++) {
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for (pixel_x = 0; pixel_x < 4; pixel_x++, flags >>= 1)
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pixels[pixel_ptr++] =
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colors[((pixel_y & 0x2) << 1) +
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(pixel_x & 0x2) + ((flags & 0x1) ^ 1)];
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pixel_ptr -= row_dec;
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}
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} else {
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/* 2-color encoding */
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for (pixel_y = 0; pixel_y < 4; pixel_y++) {
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for (pixel_x = 0; pixel_x < 4; pixel_x++, flags >>= 1)
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pixels[pixel_ptr++] = colors[(flags & 0x1) ^ 1];
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pixel_ptr -= row_dec;
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}
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}
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} else {
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/* otherwise, it's a 1-color block */
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colors[0] = (byte_b << 8) | byte_a;
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for (pixel_y = 0; pixel_y < 4; pixel_y++) {
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for (pixel_x = 0; pixel_x < 4; pixel_x++)
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pixels[pixel_ptr++] = colors[0];
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pixel_ptr -= row_dec;
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}
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}
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block_ptr += block_inc;
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total_blocks--;
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}
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}
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}
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static LRESULT
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CRAM_DecompressQuery( Msvideo1Context *info, LPBITMAPINFO in, LPBITMAPINFO out )
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{
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TRACE("ICM_DECOMPRESS_QUERY %p %p %p\n", info, in, out);
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if( (info==NULL) || (info->dwMagic!=CRAM_MAGIC) )
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return ICERR_BADPARAM;
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TRACE("planes = %d\n", in->bmiHeader.biPlanes );
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TRACE("bpp = %d\n", in->bmiHeader.biBitCount );
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TRACE("height = %ld\n", in->bmiHeader.biHeight );
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TRACE("width = %ld\n", in->bmiHeader.biWidth );
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TRACE("compr = %lx\n", in->bmiHeader.biCompression );
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if( ( in->bmiHeader.biCompression != CRAM_MAGIC ) &&
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( in->bmiHeader.biCompression != MSVC_MAGIC ) &&
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( in->bmiHeader.biCompression != WHAM_MAGIC ) )
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return ICERR_UNSUPPORTED;
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if( ( in->bmiHeader.biBitCount != 16 ) &&
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( in->bmiHeader.biBitCount != 8 ) )
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{
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TRACE("can't do %d bpp\n", in->bmiHeader.biBitCount );
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return ICERR_UNSUPPORTED;
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}
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/* output must be same dimensions as input */
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if( out )
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{
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if( in->bmiHeader.biBitCount != out->bmiHeader.biBitCount )
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return ICERR_UNSUPPORTED;
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if( in->bmiHeader.biPlanes != out->bmiHeader.biPlanes )
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return ICERR_UNSUPPORTED;
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if( in->bmiHeader.biHeight != out->bmiHeader.biHeight )
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return ICERR_UNSUPPORTED;
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if( in->bmiHeader.biWidth != out->bmiHeader.biWidth )
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return ICERR_UNSUPPORTED;
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}
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TRACE("OK!\n");
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return ICERR_OK;
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}
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static LRESULT
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CRAM_DecompressGetFormat( Msvideo1Context *info, LPBITMAPINFO in, LPBITMAPINFO out )
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{
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DWORD size;
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TRACE("ICM_DECOMPRESS_GETFORMAT %p %p %p\n", info, in, out);
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if( (info==NULL) || (info->dwMagic!=CRAM_MAGIC) )
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return ICERR_BADPARAM;
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size = in->bmiHeader.biSize;
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if (in->bmiHeader.biBitCount <= 8)
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size += in->bmiHeader.biClrUsed * sizeof(RGBQUAD);
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if( out )
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{
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memcpy( out, in, size );
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out->bmiHeader.biCompression = BI_RGB;
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out->bmiHeader.biSizeImage = in->bmiHeader.biHeight
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* in->bmiHeader.biWidth *4;
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return ICERR_OK;
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}
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return size;
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}
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static LRESULT CRAM_DecompressBegin( Msvideo1Context *info, LPBITMAPINFO in, LPBITMAPINFO out )
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{
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TRACE("ICM_DECOMPRESS_BEGIN %p %p %p\n", info, in, out);
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if( (info==NULL) || (info->dwMagic!=CRAM_MAGIC) )
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return ICERR_BADPARAM;
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TRACE("bitmap is %d bpp\n", in->bmiHeader.biBitCount);
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if( in->bmiHeader.biBitCount == 8 )
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info->mode_8bit = 1;
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else if( in->bmiHeader.biBitCount == 16 )
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info->mode_8bit = 0;
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else
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{
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ERR("Bad output format\n");
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return ICERR_BADPARAM;
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}
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return ICERR_OK;
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}
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static LRESULT CRAM_Decompress( Msvideo1Context *info, ICDECOMPRESS *icd, DWORD size )
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{
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LONG width, height, stride, sz;
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WORD bit_per_pixel;
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TRACE("ICM_DECOMPRESS %p %p %ld\n", info, icd, size);
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if( (info==NULL) || (info->dwMagic!=CRAM_MAGIC) )
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return ICERR_BADPARAM;
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/* FIXME: flags are ignored */
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width = icd->lpbiInput->biWidth;
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height = icd->lpbiInput->biHeight;
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bit_per_pixel = icd->lpbiInput->biBitCount;
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stride = width*bit_per_pixel/8;
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sz = icd->lpbiInput->biSizeImage;
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if (info->mode_8bit)
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{
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msvideo1_decode_8bit( width, height, icd->lpInput, sz,
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icd->lpOutput, stride);
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}
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else
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{
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msvideo1_decode_16bit( width, height, icd->lpInput, sz,
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icd->lpOutput, stride);
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}
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return ICERR_OK;
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}
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static LRESULT CRAM_DecompressEx( Msvideo1Context *info, ICDECOMPRESSEX *icd, DWORD size )
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{
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LONG width, height, stride, sz;
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WORD bit_per_pixel;
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TRACE("ICM_DECOMPRESSEX %p %p %ld\n", info, icd, size);
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if( (info==NULL) || (info->dwMagic!=CRAM_MAGIC) )
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return ICERR_BADPARAM;
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/* FIXME: flags are ignored */
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width = icd->lpbiSrc->biWidth;
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height = icd->lpbiSrc->biHeight;
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bit_per_pixel = icd->lpbiSrc->biBitCount;
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stride = width*bit_per_pixel/8;
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sz = icd->lpbiSrc->biSizeImage;
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if (info->mode_8bit)
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{
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msvideo1_decode_8bit( width, height, icd->lpSrc, sz,
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icd->lpDst, stride);
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}
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else
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{
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msvideo1_decode_16bit( width, height, icd->lpSrc, sz,
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icd->lpDst, stride);
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}
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return ICERR_OK;
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}
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static LRESULT CRAM_GetInfo( Msvideo1Context *info, ICINFO *icinfo, DWORD dwSize )
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{
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if (!icinfo) return sizeof(ICINFO);
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if (dwSize < sizeof(ICINFO)) return 0;
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icinfo->dwSize = sizeof(ICINFO);
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icinfo->fccType = ICTYPE_VIDEO;
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icinfo->fccHandler = info ? info->dwMagic : CRAM_MAGIC;
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icinfo->dwFlags = 0;
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icinfo->dwVersion = ICVERSION;
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icinfo->dwVersionICM = ICVERSION;
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LoadStringW(MSVIDC32_hModule, IDS_NAME, icinfo->szName, sizeof(icinfo->szName)/sizeof(WCHAR));
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LoadStringW(MSVIDC32_hModule, IDS_DESCRIPTION, icinfo->szDescription, sizeof(icinfo->szDescription)/sizeof(WCHAR));
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/* msvfw32 will fill icinfo->szDriver for us */
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return sizeof(ICINFO);
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}
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/***********************************************************************
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* DriverProc (MSVIDC32.@)
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*/
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LRESULT WINAPI CRAM_DriverProc( DWORD_PTR dwDriverId, HDRVR hdrvr, UINT msg,
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LPARAM lParam1, LPARAM lParam2 )
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{
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Msvideo1Context *info = (Msvideo1Context *) dwDriverId;
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LRESULT r = 0;
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TRACE("%ld %p %04x %08lx %08lx\n", dwDriverId, hdrvr, msg, lParam1, lParam2);
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switch( msg )
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{
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case DRV_LOAD:
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TRACE("Loaded\n");
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r = 1;
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break;
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case DRV_ENABLE:
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break;
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case DRV_OPEN:
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TRACE("Opened\n");
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info = HeapAlloc( GetProcessHeap(), 0, sizeof (Msvideo1Context) );
|
|
if( info )
|
|
{
|
|
memset( info, 0, sizeof info );
|
|
info->dwMagic = CRAM_MAGIC;
|
|
}
|
|
r = (LRESULT) info;
|
|
break;
|
|
|
|
case ICM_GETINFO:
|
|
r = CRAM_GetInfo( info, (ICINFO *)lParam1, (DWORD)lParam2 );
|
|
break;
|
|
|
|
case ICM_DECOMPRESS_QUERY:
|
|
r = CRAM_DecompressQuery( info, (LPBITMAPINFO) lParam1,
|
|
(LPBITMAPINFO) lParam2 );
|
|
break;
|
|
|
|
case ICM_DECOMPRESS_GET_FORMAT:
|
|
r = CRAM_DecompressGetFormat( info, (LPBITMAPINFO) lParam1,
|
|
(LPBITMAPINFO) lParam2 );
|
|
break;
|
|
|
|
case ICM_DECOMPRESS_GET_PALETTE:
|
|
FIXME("ICM_DECOMPRESS_GET_PALETTE\n");
|
|
break;
|
|
|
|
case ICM_DECOMPRESSEX_QUERY:
|
|
FIXME("ICM_DECOMPRESSEX_QUERY\n");
|
|
break;
|
|
|
|
case ICM_DECOMPRESS:
|
|
r = CRAM_Decompress( info, (ICDECOMPRESS*) lParam1,
|
|
(DWORD) lParam2 );
|
|
break;
|
|
|
|
case ICM_DECOMPRESS_BEGIN:
|
|
r = CRAM_DecompressBegin( info, (LPBITMAPINFO) lParam1,
|
|
(LPBITMAPINFO) lParam2 );
|
|
break;
|
|
|
|
case ICM_DECOMPRESSEX:
|
|
r = CRAM_DecompressEx( info, (ICDECOMPRESSEX*) lParam1,
|
|
(DWORD) lParam2 );
|
|
break;
|
|
|
|
case DRV_CLOSE:
|
|
HeapFree( GetProcessHeap(), 0, info );
|
|
break;
|
|
|
|
case DRV_DISABLE:
|
|
break;
|
|
|
|
case DRV_FREE:
|
|
break;
|
|
|
|
default:
|
|
FIXME("Unknown message: %04x %ld %ld\n", msg, lParam1, lParam2);
|
|
}
|
|
|
|
return r;
|
|
}
|
|
|
|
BOOL WINAPI DllMain(HINSTANCE hModule, DWORD dwReason, LPVOID lpReserved)
|
|
{
|
|
TRACE("(%p,%ld,%p)\n", hModule, dwReason, lpReserved);
|
|
|
|
switch (dwReason)
|
|
{
|
|
case DLL_PROCESS_ATTACH:
|
|
DisableThreadLibraryCalls(hModule);
|
|
MSVIDC32_hModule = hModule;
|
|
break;
|
|
|
|
case DLL_PROCESS_DETACH:
|
|
break;
|
|
}
|
|
return TRUE;
|
|
}
|