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/*
* Microsoft Video-1 Decoder
* Copyright (C) 2003 the ffmpeg project
*
* Portions Copyright (C) 2004 Mike McCormack for CodeWeavers
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*
*/
/**
* @file msvideo1.c
* Microsoft Video-1 Decoder by Mike Melanson (melanson@pcisys.net)
* For more information about the MS Video-1 format, visit:
* http://www.pcisys.net/~melanson/codecs/
*
* This decoder outputs either PAL8 or RGB555 data, depending on the
* whether a RGB palette was passed through palctrl;
* if it's present, then the data is PAL8; RGB555 otherwise.
*/
#include <stdarg.h>
#include "windef.h"
#include "winbase.h"
#include "wingdi.h"
#include "winuser.h"
#include "commdlg.h"
#include "vfw.h"
#include "mmsystem.h"
#include "msvidc32_private.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(msvidc32);
static HINSTANCE MSVIDC32_hModule;
#define CRAM_MAGIC mmioFOURCC('C', 'R', 'A', 'M')
#define MSVC_MAGIC mmioFOURCC('M', 'S', 'V', 'C')
#define WHAM_MAGIC mmioFOURCC('W', 'H', 'A', 'M')
#define compare_fourcc(fcc1, fcc2) (((fcc1)^(fcc2))&~0x20202020)
#define PALETTE_COUNT 256
#define LE_16(x) ((((const uint8_t *)(x))[1] << 8) | ((const uint8_t *)(x))[0])
/* FIXME - check the stream size */
#define CHECK_STREAM_PTR(n) \
if ((stream_ptr + n) > buf_size ) { \
WARN("stream_ptr out of bounds (%d >= %d)\n", \
stream_ptr + n, buf_size); \
return; \
}
typedef BYTE uint8_t;
typedef struct Msvideo1Context {
DWORD dwMagic;
int depth;
} Msvideo1Context;
static inline int get_stride(int width, int depth)
{
return ((depth * width + 31) >> 3) & ~3;
}
static void
msvideo1_decode_8bit( int width, int height, const unsigned char *buf, int buf_size,
unsigned char *pixels, int stride)
{
int block_ptr, pixel_ptr;
int total_blocks;
int pixel_x, pixel_y; /* pixel width and height iterators */
int block_x, block_y; /* block width and height iterators */
int blocks_wide, blocks_high; /* width and height in 4x4 blocks */
int block_inc;
int row_dec;
/* decoding parameters */
int stream_ptr;
unsigned char byte_a, byte_b;
unsigned short flags;
int skip_blocks;
unsigned char colors[8];
stream_ptr = 0;
skip_blocks = 0;
blocks_wide = width / 4;
blocks_high = height / 4;
total_blocks = blocks_wide * blocks_high;
block_inc = 4;
#ifdef ORIGINAL
row_dec = stride + 4;
#else
row_dec = - (stride - 4); /* such that -row_dec > 0 */
#endif
for (block_y = blocks_high; block_y > 0; block_y--) {
#ifdef ORIGINAL
block_ptr = ((block_y * 4) - 1) * stride;
#else
block_ptr = ((blocks_high - block_y) * 4) * stride;
#endif
for (block_x = blocks_wide; block_x > 0; block_x--) {
/* check if this block should be skipped */
if (skip_blocks) {
block_ptr += block_inc;
skip_blocks--;
total_blocks--;
continue;
}
pixel_ptr = block_ptr;
/* get the next two bytes in the encoded data stream */
CHECK_STREAM_PTR(2);
byte_a = buf[stream_ptr++];
byte_b = buf[stream_ptr++];
/* check if the decode is finished */
if ((byte_a == 0) && (byte_b == 0) && (total_blocks == 0))
return;
else if ((byte_b & 0xFC) == 0x84) {
/* skip code, but don't count the current block */
skip_blocks = ((byte_b - 0x84) << 8) + byte_a - 1;
} else if (byte_b < 0x80) {
/* 2-color encoding */
flags = (byte_b << 8) | byte_a;
CHECK_STREAM_PTR(2);
colors[0] = buf[stream_ptr++];
colors[1] = buf[stream_ptr++];
for (pixel_y = 0; pixel_y < 4; pixel_y++) {
for (pixel_x = 0; pixel_x < 4; pixel_x++, flags >>= 1)
pixels[pixel_ptr++] = colors[(flags & 0x1) ^ 1];
pixel_ptr -= row_dec;
}
} else if (byte_b >= 0x90) {
/* 8-color encoding */
flags = (byte_b << 8) | byte_a;
CHECK_STREAM_PTR(8);
memcpy(colors, &buf[stream_ptr], 8);
stream_ptr += 8;
for (pixel_y = 0; pixel_y < 4; pixel_y++) {
for (pixel_x = 0; pixel_x < 4; pixel_x++, flags >>= 1)
pixels[pixel_ptr++] =
colors[((pixel_y & 0x2) << 1) +
(pixel_x & 0x2) + ((flags & 0x1) ^ 1)];
pixel_ptr -= row_dec;
}
} else {
/* 1-color encoding */
colors[0] = byte_a;
for (pixel_y = 0; pixel_y < 4; pixel_y++) {
for (pixel_x = 0; pixel_x < 4; pixel_x++)
pixels[pixel_ptr++] = colors[0];
pixel_ptr -= row_dec;
}
}
block_ptr += block_inc;
total_blocks--;
}
}
}
static void
msvideo1_decode_16bit( int width, int height, const unsigned char *buf, int buf_size,
unsigned short *pixels, int stride)
{
int block_ptr, pixel_ptr;
int total_blocks;
int pixel_x, pixel_y; /* pixel width and height iterators */
int block_x, block_y; /* block width and height iterators */
int blocks_wide, blocks_high; /* width and height in 4x4 blocks */
int block_inc;
int row_dec;
/* decoding parameters */
int stream_ptr;
unsigned char byte_a, byte_b;
unsigned short flags;
int skip_blocks;
unsigned short colors[8];
stream_ptr = 0;
skip_blocks = 0;
blocks_wide = width / 4;
blocks_high = height / 4;
total_blocks = blocks_wide * blocks_high;
block_inc = 4;
#ifdef ORIGINAL
row_dec = stride + 4;
#else
row_dec = - (stride - 4); /* such that -row_dec > 0 */
#endif
for (block_y = blocks_high; block_y > 0; block_y--) {
#ifdef ORIGINAL
block_ptr = ((block_y * 4) - 1) * stride;
#else
block_ptr = ((blocks_high - block_y) * 4) * stride;
#endif
for (block_x = blocks_wide; block_x > 0; block_x--) {
/* check if this block should be skipped */
if (skip_blocks) {
block_ptr += block_inc;
skip_blocks--;
total_blocks--;
continue;
}
pixel_ptr = block_ptr;
/* get the next two bytes in the encoded data stream */
CHECK_STREAM_PTR(2);
byte_a = buf[stream_ptr++];
byte_b = buf[stream_ptr++];
/* check if the decode is finished */
if ((byte_a == 0) && (byte_b == 0) && (total_blocks == 0)) {
return;
} else if ((byte_b & 0xFC) == 0x84) {
/* skip code, but don't count the current block */
skip_blocks = ((byte_b - 0x84) << 8) + byte_a - 1;
} else if (byte_b < 0x80) {
/* 2- or 8-color encoding modes */
flags = (byte_b << 8) | byte_a;
CHECK_STREAM_PTR(4);
colors[0] = LE_16(&buf[stream_ptr]);
stream_ptr += 2;
colors[1] = LE_16(&buf[stream_ptr]);
stream_ptr += 2;
if (colors[0] & 0x8000) {
/* 8-color encoding */
CHECK_STREAM_PTR(12);
colors[2] = LE_16(&buf[stream_ptr]);
stream_ptr += 2;
colors[3] = LE_16(&buf[stream_ptr]);
stream_ptr += 2;
colors[4] = LE_16(&buf[stream_ptr]);
stream_ptr += 2;
colors[5] = LE_16(&buf[stream_ptr]);
stream_ptr += 2;
colors[6] = LE_16(&buf[stream_ptr]);
stream_ptr += 2;
colors[7] = LE_16(&buf[stream_ptr]);
stream_ptr += 2;
for (pixel_y = 0; pixel_y < 4; pixel_y++) {
for (pixel_x = 0; pixel_x < 4; pixel_x++, flags >>= 1)
pixels[pixel_ptr++] =
colors[((pixel_y & 0x2) << 1) +
(pixel_x & 0x2) + ((flags & 0x1) ^ 1)];
pixel_ptr -= row_dec;
}
} else {
/* 2-color encoding */
for (pixel_y = 0; pixel_y < 4; pixel_y++) {
for (pixel_x = 0; pixel_x < 4; pixel_x++, flags >>= 1)
pixels[pixel_ptr++] = colors[(flags & 0x1) ^ 1];
pixel_ptr -= row_dec;
}
}
} else {
/* otherwise, it's a 1-color block */
colors[0] = (byte_b << 8) | byte_a;
for (pixel_y = 0; pixel_y < 4; pixel_y++) {
for (pixel_x = 0; pixel_x < 4; pixel_x++)
pixels[pixel_ptr++] = colors[0];
pixel_ptr -= row_dec;
}
}
block_ptr += block_inc;
total_blocks--;
}
}
}
static LRESULT
CRAM_DecompressQuery( Msvideo1Context *info, LPBITMAPINFO in, LPBITMAPINFO out )
{
TRACE("ICM_DECOMPRESS_QUERY %p %p %p\n", info, in, out);
if( (info==NULL) || (info->dwMagic!=CRAM_MAGIC) )
return ICERR_BADPARAM;
TRACE("in->planes = %d\n", in->bmiHeader.biPlanes );
TRACE("in->bpp = %d\n", in->bmiHeader.biBitCount );
TRACE("in->height = %d\n", in->bmiHeader.biHeight );
TRACE("in->width = %d\n", in->bmiHeader.biWidth );
TRACE("in->compr = 0x%x\n", in->bmiHeader.biCompression );
if( ( in->bmiHeader.biCompression != CRAM_MAGIC ) &&
( in->bmiHeader.biCompression != MSVC_MAGIC ) &&
( in->bmiHeader.biCompression != WHAM_MAGIC ) )
{
TRACE("can't do 0x%x compression\n", in->bmiHeader.biCompression);
return ICERR_BADFORMAT;
}
if( ( in->bmiHeader.biBitCount != 16 ) &&
( in->bmiHeader.biBitCount != 8 ) )
{
TRACE("can't do %d bpp\n", in->bmiHeader.biBitCount );
return ICERR_BADFORMAT;
}
/* output must be same dimensions as input */
if( out )
{
TRACE("out->planes = %d\n", out->bmiHeader.biPlanes );
TRACE("out->bpp = %d\n", out->bmiHeader.biBitCount );
TRACE("out->height = %d\n", out->bmiHeader.biHeight );
TRACE("out->width = %d\n", out->bmiHeader.biWidth );
if ((in->bmiHeader.biBitCount != out->bmiHeader.biBitCount) &&
(in->bmiHeader.biBitCount != 16 || out->bmiHeader.biBitCount != 24))
{
TRACE("incompatible depth requested\n");
return ICERR_BADFORMAT;
}
if(( in->bmiHeader.biPlanes != out->bmiHeader.biPlanes ) ||
( in->bmiHeader.biHeight != out->bmiHeader.biHeight ) ||
( in->bmiHeader.biWidth != out->bmiHeader.biWidth ))
{
TRACE("incompatible output requested\n");
return ICERR_BADFORMAT;
}
}
TRACE("OK!\n");
return ICERR_OK;
}
static LRESULT
CRAM_DecompressGetFormat( Msvideo1Context *info, LPBITMAPINFO in, LPBITMAPINFO out )
{
DWORD size;
TRACE("ICM_DECOMPRESS_GETFORMAT %p %p %p\n", info, in, out);
if( (info==NULL) || (info->dwMagic!=CRAM_MAGIC) )
return ICERR_BADPARAM;
size = in->bmiHeader.biSize;
if (in->bmiHeader.biBitCount <= 8)
size += in->bmiHeader.biClrUsed * sizeof(RGBQUAD);
if (in->bmiHeader.biBitCount != 8 && in->bmiHeader.biBitCount != 16)
return ICERR_BADFORMAT;
if( out )
{
memcpy( out, in, size );
out->bmiHeader.biWidth = in->bmiHeader.biWidth & ~1;
out->bmiHeader.biHeight = in->bmiHeader.biHeight & ~1;
out->bmiHeader.biCompression = BI_RGB;
out->bmiHeader.biSizeImage = in->bmiHeader.biHeight *
get_stride(out->bmiHeader.biWidth, out->bmiHeader.biBitCount);
return ICERR_OK;
}
return size;
}
static LRESULT CRAM_DecompressBegin( Msvideo1Context *info, LPBITMAPINFO in, LPBITMAPINFO out )
{
TRACE("ICM_DECOMPRESS_BEGIN %p %p %p\n", info, in, out);
if( (info==NULL) || (info->dwMagic!=CRAM_MAGIC) )
return ICERR_BADPARAM;
TRACE("bitmap is %d bpp\n", in->bmiHeader.biBitCount);
if( in->bmiHeader.biBitCount == 8 )
info->depth = 8;
else if( in->bmiHeader.biBitCount == 16 )
info->depth = 16;
else
{
info->depth = 0;
FIXME("Unsupported output format %i\n", in->bmiHeader.biBitCount);
}
return ICERR_OK;
}
static void convert_depth(char *input, int depth_in, char *output, BITMAPINFOHEADER *out_hdr)
{
int x, y;
int stride_in = get_stride(out_hdr->biWidth, depth_in);
int stride_out = get_stride(out_hdr->biWidth, out_hdr->biBitCount);
if (depth_in == 16 && out_hdr->biBitCount == 24)
{
static const unsigned char convert_5to8[] =
{
0x00, 0x08, 0x10, 0x19, 0x21, 0x29, 0x31, 0x3a,
0x42, 0x4a, 0x52, 0x5a, 0x63, 0x6b, 0x73, 0x7b,
0x84, 0x8c, 0x94, 0x9c, 0xa5, 0xad, 0xb5, 0xbd,
0xc5, 0xce, 0xd6, 0xde, 0xe6, 0xef, 0xf7, 0xff,
};
for (y = 0; y < out_hdr->biHeight; y++)
{
WORD *src_row = (WORD *)(input + y * stride_in);
char *out_row = output + y * stride_out;
for (x = 0; x < out_hdr->biWidth; x++)
{
WORD pixel = *src_row++;
*out_row++ = convert_5to8[(pixel & 0x7c00u) >> 10];
*out_row++ = convert_5to8[(pixel & 0x03e0u) >> 5];
*out_row++ = convert_5to8[(pixel & 0x001fu)];
}
}
}
else
FIXME("Conversion from %d to %d bit unimplemented\n", depth_in, out_hdr->biBitCount);
}
static LRESULT CRAM_Decompress( Msvideo1Context *info, ICDECOMPRESS *icd, DWORD size )
{
LONG width, height, stride, sz;
void *output;
TRACE("ICM_DECOMPRESS %p %p %d\n", info, icd, size);
if( (info==NULL) || (info->dwMagic!=CRAM_MAGIC) )
return ICERR_BADPARAM;
/* FIXME: flags are ignored */
width = icd->lpbiInput->biWidth;
height = icd->lpbiInput->biHeight;
sz = icd->lpbiInput->biSizeImage;
output = icd->lpOutput;
if (icd->lpbiOutput->biBitCount != info->depth)
{
output = HeapAlloc(GetProcessHeap(), 0, icd->lpbiOutput->biWidth * icd->lpbiOutput->biHeight * info->depth / 8);
if (!output) return ICERR_MEMORY;
}
if (info->depth == 8)
{
stride = get_stride(width, 8);
msvideo1_decode_8bit( width, height, icd->lpInput, sz,
output, stride );
}
else
{
stride = get_stride(width, 16) / 2;
msvideo1_decode_16bit( width, height, icd->lpInput, sz,
output, stride );
}
if (icd->lpbiOutput->biBitCount != info->depth)
{
convert_depth(output, info->depth, icd->lpOutput, icd->lpbiOutput);
HeapFree(GetProcessHeap(), 0, output);
}
return ICERR_OK;
}
static LRESULT CRAM_DecompressEx( Msvideo1Context *info, ICDECOMPRESSEX *icd, DWORD size )
{
LONG width, height, stride, sz;
void *output;
TRACE("ICM_DECOMPRESSEX %p %p %d\n", info, icd, size);
if( (info==NULL) || (info->dwMagic!=CRAM_MAGIC) )
return ICERR_BADPARAM;
/* FIXME: flags are ignored */
width = icd->lpbiSrc->biWidth;
height = icd->lpbiSrc->biHeight;
sz = icd->lpbiSrc->biSizeImage;
output = icd->lpDst;
if (icd->lpbiDst->biBitCount != info->depth)
{
output = HeapAlloc(GetProcessHeap(), 0, icd->lpbiDst->biWidth * icd->lpbiDst->biHeight * info->depth / 8);
if (!output) return ICERR_MEMORY;
}
if (info->depth == 8)
{
stride = get_stride(width, 8);
msvideo1_decode_8bit( width, height, icd->lpSrc, sz,
output, stride );
}
else
{
stride = get_stride(width, 16) / 2;
msvideo1_decode_16bit( width, height, icd->lpSrc, sz,
output, stride );
}
if (icd->lpbiDst->biBitCount != info->depth)
{
convert_depth(output, info->depth, icd->lpDst, icd->lpbiDst);
HeapFree(GetProcessHeap(), 0, output);
}
return ICERR_OK;
}
static LRESULT CRAM_GetInfo( const Msvideo1Context *info, ICINFO *icinfo, DWORD dwSize )
{
if (!icinfo) return sizeof(ICINFO);
if (dwSize < sizeof(ICINFO)) return 0;
icinfo->dwSize = sizeof(ICINFO);
icinfo->fccType = ICTYPE_VIDEO;
icinfo->fccHandler = info ? info->dwMagic : CRAM_MAGIC;
icinfo->dwFlags = 0;
icinfo->dwVersion = ICVERSION;
icinfo->dwVersionICM = ICVERSION;
LoadStringW(MSVIDC32_hModule, IDS_NAME, icinfo->szName, ARRAY_SIZE(icinfo->szName));
LoadStringW(MSVIDC32_hModule, IDS_DESCRIPTION, icinfo->szDescription, ARRAY_SIZE(icinfo->szDescription));
/* msvfw32 will fill icinfo->szDriver for us */
return sizeof(ICINFO);
}
/***********************************************************************
* DriverProc (MSVIDC32.@)
*/
LRESULT WINAPI CRAM_DriverProc( DWORD_PTR dwDriverId, HDRVR hdrvr, UINT msg,
LPARAM lParam1, LPARAM lParam2 )
{
Msvideo1Context *info = (Msvideo1Context *) dwDriverId;
LRESULT r = ICERR_UNSUPPORTED;
TRACE("%ld %p %04x %08lx %08lx\n", dwDriverId, hdrvr, msg, lParam1, lParam2);
switch( msg )
{
case DRV_LOAD:
TRACE("Loaded\n");
r = 1;
break;
case DRV_ENABLE:
break;
case DRV_OPEN:
{
ICINFO *icinfo = (ICINFO *)lParam2;
TRACE("Opened\n");
if (icinfo && compare_fourcc(icinfo->fccType, ICTYPE_VIDEO)) return 0;
info = HeapAlloc( GetProcessHeap(), 0, sizeof (Msvideo1Context) );
if( info )
{
memset( info, 0, sizeof *info );
info->dwMagic = CRAM_MAGIC;
}
r = (LRESULT) info;
break;
}
case DRV_CLOSE:
HeapFree( GetProcessHeap(), 0, info );
break;
case DRV_DISABLE:
break;
case DRV_FREE:
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 ICM_DECOMPRESS_END:
r = ICERR_OK;
break;
case ICM_COMPRESS_QUERY:
r = ICERR_BADFORMAT;
/* fall through */
case ICM_COMPRESS_GET_FORMAT:
case ICM_COMPRESS_END:
case ICM_COMPRESS:
FIXME("compression not implemented\n");
break;
case ICM_CONFIGURE:
break;
default:
FIXME("Unknown message: %04x %ld %ld\n", msg, lParam1, lParam2);
}
return r;
}
/***********************************************************************
* DllMain
*/
BOOL WINAPI DllMain(HINSTANCE hModule, DWORD dwReason, LPVOID lpReserved)
{
TRACE("(%p,%d,%p)\n", hModule, dwReason, lpReserved);
switch (dwReason)
{
case DLL_PROCESS_ATTACH:
DisableThreadLibraryCalls(hModule);
MSVIDC32_hModule = hModule;
break;
}
return TRUE;
}
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