[PATCH] remove non-cleanroom pwc driver compression

The original pwc author raised some questions about the reverse
engineering of the decompressor algorithms used in the pwc driver.
Having done some detailed investigation it appears those concerns that
clean room policy was not followed are reasonable.  I've also had a
friendly discussion with Philips to ask their view on this.

This removes the problem items of code which reduces the pwc
functionality in the kernel a little but leaves all the framework for
setup that will be needed for decompressors in user space (where they
eventually belong).  This change set is designed to be the minimal risk
change set given that 2.6.12 is hopefully close to hand, with a view to
merging the much updated pwc code in 2.6.13 series kernels.

Someone else can then redo the decompressors properly (clean room) in
user space.

Note that while its easy to say that it should have been caught earlier,
but the violation was really only obvious to someone who had access to
both the proprietary source and the 'GPL' source.

1 files changed, 0 insertions, 623 deletions

diff --git a/drivers/usb/media/pwc/pwc-dec23.c b/drivers/usb/media/pwc/pwc-dec23.c
deleted file mode 100644
index 98fa3f7a9ef..00000000000
--- a/drivers/usb/media/pwc/pwc-dec23.c
+++ /dev/null
@@ -1,623 +0,0 @@
-/* Linux driver for Philips webcam
-   Decompression for chipset version 2 et 3
-   (C) 2004      Luc Saillard (luc@saillard.org)
-
-   NOTE: this version of pwc is an unofficial (modified) release of pwc & pcwx
-   driver and thus may have bugs that are not present in the original version.
-   Please send bug reports and support requests to <luc@saillard.org>.
-   The decompression routines have been implemented by reverse-engineering the
-   Nemosoft binary pwcx module. Caveat emptor.
-
-   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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
-*/
-
-#include "pwc-timon.h"
-#include "pwc-kiara.h"
-#include "pwc-dec23.h"
-#include "pwc-ioctl.h"
-
-#include <linux/string.h>
-
-/****
- *
- *
- *
- */
-
-
-static void fill_table_a000(unsigned int *p)
-{
-  static unsigned int initial_values[12] = {
-     0xFFAD9B00, 0xFFDDEE00, 0x00221200, 0x00526500,
-     0xFFC21E00, 0x003DE200, 0xFF924B80, 0xFFD2A300,
-     0x002D5D00, 0x006DB480, 0xFFED3E00, 0x0012C200
-  };
-  static unsigned int values_derivated[12] = {
-     0x0000A4CA, 0x00004424, 0xFFFFBBDC, 0xFFFF5B36,
-     0x00007BC4, 0xFFFF843C, 0x0000DB69, 0x00005ABA,
-     0xFFFFA546, 0xFFFF2497, 0x00002584, 0xFFFFDA7C
-  };
-  unsigned int temp_values[12];
-  int i,j;
-
-  memcpy(temp_values,initial_values,sizeof(initial_values));
-  for (i=0;i<256;i++)
-   {
-     for (j=0;j<12;j++)
-      {
-	*p++ = temp_values[j];
-	temp_values[j] += values_derivated[j];
-      }
-   }
-}
-
-static void fill_table_d000(unsigned char *p)
-{
-  int bit,byte;
-
-  for (bit=0; bit<8; bit++)
-   {
-     unsigned char bitpower = 1<<bit;
-     unsigned char mask = bitpower-1;
-     for (byte=0; byte<256; byte++)
-      {
-	if (byte & bitpower)
-	  *p++ = -(byte & mask);
-	else
-	  *p++ = (byte & mask);
-      }
-   }
-}
-
-/*
- *
- * Kiara: 0 <= ver <= 7
- * Timon: 0 <= ver <= 15
- *
- */
-static void fill_table_color(unsigned int version, const unsigned int *romtable, 
-    unsigned char *p0004, 
-    unsigned char *p8004)
-{
-  const unsigned int *table;
-  unsigned char *p0, *p8;
-  int i,j,k;
-  int dl,bit,pw;
-
-  romtable += version*256;
-
-  for (i=0; i<2; i++)
-   {
-     table = romtable + i*128;
-
-     for (dl=0; dl<16; dl++)
-      {
-	p0 = p0004 + (i<<14) + (dl<<10);
-	p8 = p8004 + (i<<12) + (dl<<8);
-
-	for (j=0; j<8; j++ , table++, p0+=128)
-	 {
-	   for (k=0; k<16; k++)
-	    {
-	      if (k==0)
-		bit=1;
-	      else if (k>=1 && k<3)
-		bit=(table[0]>>15)&7;
-	      else if (k>=3 && k<6)
-		bit=(table[0]>>12)&7;
-	      else if (k>=6 && k<10)
-		bit=(table[0]>>9)&7;
-	      else if (k>=10 && k<13)
-		bit=(table[0]>>6)&7;
-	      else if (k>=13 && k<15)
-		bit=(table[0]>>3)&7;
-	      else
-		bit=(table[0])&7;
-	      if (k == 0)
-		*(unsigned char *)p8++ = 8;
-	      else
-		*(unsigned char *)p8++ = j - bit;
-	      *(unsigned char *)p8++ = bit;
-
-	      pw = 1<<bit;
-	      p0[k+0x00] = (1*pw)  + 0x80;
-	      p0[k+0x10] = (2*pw)  + 0x80;
-	      p0[k+0x20] = (3*pw)  + 0x80;
-	      p0[k+0x30] = (4*pw)  + 0x80;
-	      p0[k+0x40] = (-pw)   + 0x80;
-	      p0[k+0x50] = (2*-pw) + 0x80;
-	      p0[k+0x60] = (3*-pw) + 0x80;
-	      p0[k+0x70] = (4*-pw) + 0x80;
-	    } /* end of for (k=0; k<16; k++, p8++) */
-	 } /* end of for (j=0; j<8; j++ , table++) */
-      } /* end of for (dl=0; dl<16; dl++) */
-   } /* end of for (i=0; i<2; i++) */
-}
-
-/*
- * precision = (pdev->xx + pdev->yy)
- *
- */
-static void fill_table_dc00_d800(unsigned int precision, unsigned int *pdc00, unsigned int *pd800)
-{
-  int i;
-  unsigned int offset1, offset2;
- 
-  for(i=0,offset1=0x4000, offset2=0; i<256 ; i++,offset1+=0x7BC4, offset2+=0x7BC4)
-   {
-     unsigned int msb = offset1 >> 15;
-
-     if ( msb > 255)
-      {
-	if (msb)
-	  msb=0;
-	else
-	  msb=255;
-      }
-
-     *pdc00++ = msb << precision;
-     *pd800++ = offset2;
-   }
-
-}
-
-/*
- * struct {
- *   unsigned char op;	    // operation to execute
- *   unsigned char bits;    // bits use to perform operation
- *   unsigned char offset1; // offset to add to access in the table_0004 % 16
- *   unsigned char offset2; // offset to add to access in the table_0004
- * }
- *
- */
-static unsigned int table_ops[] = {
-0x02,0x00,0x00,0x00, 0x00,0x03,0x01,0x00, 0x00,0x04,0x01,0x10, 0x00,0x06,0x01,0x30,
-0x02,0x00,0x00,0x00, 0x00,0x03,0x01,0x40, 0x00,0x05,0x01,0x20, 0x01,0x00,0x00,0x00,
-0x02,0x00,0x00,0x00, 0x00,0x03,0x01,0x00, 0x00,0x04,0x01,0x50, 0x00,0x05,0x02,0x00,
-0x02,0x00,0x00,0x00, 0x00,0x03,0x01,0x40, 0x00,0x05,0x03,0x00, 0x01,0x00,0x00,0x00,
-0x02,0x00,0x00,0x00, 0x00,0x03,0x01,0x00, 0x00,0x04,0x01,0x10, 0x00,0x06,0x02,0x10,
-0x02,0x00,0x00,0x00, 0x00,0x03,0x01,0x40, 0x00,0x05,0x01,0x60, 0x01,0x00,0x00,0x00,
-0x02,0x00,0x00,0x00, 0x00,0x03,0x01,0x00, 0x00,0x04,0x01,0x50, 0x00,0x05,0x02,0x40,
-0x02,0x00,0x00,0x00, 0x00,0x03,0x01,0x40, 0x00,0x05,0x03,0x40, 0x01,0x00,0x00,0x00,
-0x02,0x00,0x00,0x00, 0x00,0x03,0x01,0x00, 0x00,0x04,0x01,0x10, 0x00,0x06,0x01,0x70,
-0x02,0x00,0x00,0x00, 0x00,0x03,0x01,0x40, 0x00,0x05,0x01,0x20, 0x01,0x00,0x00,0x00,
-0x02,0x00,0x00,0x00, 0x00,0x03,0x01,0x00, 0x00,0x04,0x01,0x50, 0x00,0x05,0x02,0x00,
-0x02,0x00,0x00,0x00, 0x00,0x03,0x01,0x40, 0x00,0x05,0x03,0x00, 0x01,0x00,0x00,0x00,
-0x02,0x00,0x00,0x00, 0x00,0x03,0x01,0x00, 0x00,0x04,0x01,0x10, 0x00,0x06,0x02,0x50,
-0x02,0x00,0x00,0x00, 0x00,0x03,0x01,0x40, 0x00,0x05,0x01,0x60, 0x01,0x00,0x00,0x00,
-0x02,0x00,0x00,0x00, 0x00,0x03,0x01,0x00, 0x00,0x04,0x01,0x50, 0x00,0x05,0x02,0x40,
-0x02,0x00,0x00,0x00, 0x00,0x03,0x01,0x40, 0x00,0x05,0x03,0x40, 0x01,0x00,0x00,0x00
-};
-
-/*
- * TODO: multiply by 4 all values
- *
- */
-static unsigned int MulIdx[256] = {
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 1, 2, 3, 0, 1, 2, 3, 0, 1, 2, 3, 0, 1, 2, 3,
- 0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3,
- 4, 4, 4, 4, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4,
- 6, 7, 8, 9, 7,10,11, 8, 8,11,10, 7, 9, 8, 7, 6,
- 4, 5, 5, 4, 4, 5, 5, 4, 4, 5, 5, 4, 4, 5, 5, 4,
- 1, 3, 0, 2, 1, 3, 0, 2, 1, 3, 0, 2, 1, 3, 0, 2,
- 0, 3, 3, 0, 1, 2, 2, 1, 2, 1, 1, 2, 3, 0, 0, 3,
- 0, 1, 2, 3, 3, 2, 1, 0, 3, 2, 1, 0, 0, 1, 2, 3,
- 1, 1, 1, 1, 3, 3, 3, 3, 0, 0, 0, 0, 2, 2, 2, 2,
- 7,10,11, 8, 9, 8, 7, 6, 6, 7, 8, 9, 8,11,10, 7,
- 4, 5, 5, 4, 5, 4, 4, 5, 5, 4, 4, 5, 4, 5, 5, 4,
- 7, 9, 6, 8,10, 8, 7,11,11, 7, 8,10, 8, 6, 9, 7,
- 1, 3, 0, 2, 2, 0, 3, 1, 2, 0, 3, 1, 1, 3, 0, 2,
- 1, 2, 2, 1, 3, 0, 0, 3, 0, 3, 3, 0, 2, 1, 1, 2,
-10, 8, 7,11, 8, 6, 9, 7, 7, 9, 6, 8,11, 7, 8,10
-};
-
-
-
-void pwc_dec23_init(int type, int release, unsigned char *mode, void *data)
-{
-  int flags;
-  struct pwc_dec23_private *pdev = data;
-  release = release;
-
-  switch (type)
-   {
-    case 720:
-    case 730:
-    case 740:
-    case 750:
-      flags = mode[2]&0x18;	/* our: flags = 8, mode[2]==e8 */
-      if (flags==8)
-	pdev->zz = 7;
-      else if (flags==0x10)
-	pdev->zz = 8;
-      else
-	pdev->zz = 6;
-      flags = mode[2]>>5;	/* our: 7 */
-
-      fill_table_color(flags, (unsigned int *)KiaraRomTable, pdev->table_0004, pdev->table_8004);
-      break;
-
-
-    case 675:
-    case 680:
-    case 690:
-      flags = mode[2]&6;
-      if (flags==2)
-	pdev->zz = 7;
-      else if (flags==4)
-	pdev->zz = 8;
-      else
-	pdev->zz = 6;
-      flags = mode[2]>>3;
-
-      fill_table_color(flags, (unsigned int *)TimonRomTable, pdev->table_0004, pdev->table_8004);
-      break;
-
-    default:
-      /* Not supported */
-      return;
-   }
-
-  /* * * * ** */
-  pdev->xx = 8 - pdev->zz;
-  pdev->yy = 15 - pdev->xx;
-  pdev->zzmask = 0xFF>>pdev->xx;
-  //pdev->zzmask = (1U<<pdev->zz)-1;
-
-
-  fill_table_dc00_d800(pdev->xx + pdev->yy, pdev->table_dc00, pdev->table_d800);
-  fill_table_a000(pdev->table_a004);
-  fill_table_d000(pdev->table_d004);
-}
-
-
-/*
- * To manage the stream, we keep in a 32 bits variables,
- * the next bits in the stream. fill_reservoir() add to
- * the reservoir at least wanted nbits.
- *
- *
- */
-#define fill_nbits(reservoir,nbits_in_reservoir,stream,nbits_wanted) do { \
-   while (nbits_in_reservoir<nbits_wanted) \
-    { \
-      reservoir |= (*(stream)++) << nbits_in_reservoir; \
-      nbits_in_reservoir+=8; \
-    } \
-}  while(0);
-
-#define get_nbits(reservoir,nbits_in_reservoir,stream,nbits_wanted,result) do { \
-   fill_nbits(reservoir,nbits_in_reservoir,stream,nbits_wanted); \
-   result = (reservoir) & ((1U<<nbits_wanted)-1); \
-   reservoir >>= nbits_wanted; \
-   nbits_in_reservoir -= nbits_wanted; \
-}  while(0);
-
-
-
-static void DecompressBand23(const struct pwc_dec23_private *pdev,
-                             const unsigned char *rawyuv,
-			     unsigned char *planar_y,
-			     unsigned char *planar_u,
-			     unsigned char *planar_v,
-			     unsigned int image_x,		/* aka number of pixels wanted ??? */
-			     unsigned int pixels_per_line,	/* aka number of pixels per line */
-			     int flags)
-{
-
-
-  unsigned int reservoir, nbits_in_reservoir;
-  int first_4_bits;
-  unsigned int bytes_per_channel;
-  int line_size;	/* size of the line (4Y+U+V) */
-  int passes;
-  const unsigned char *ptable0004, *ptable8004;
-
-  int even_line;
-  unsigned int temp_colors[16];
-  int nblocks;
-
-  const unsigned char *stream;
-  unsigned char *dest_y, *dest_u=NULL, *dest_v=NULL;
-  unsigned int offset_to_plane_u, offset_to_plane_v;
-
-  int i;
-
-
-  reservoir = 0;
-  nbits_in_reservoir = 0;
-  stream = rawyuv+1;	/* The first byte of the stream is skipped */
-  even_line = 1;
-
-  get_nbits(reservoir,nbits_in_reservoir,stream,4,first_4_bits);
-
-  line_size = pixels_per_line*3;
-
-  for (passes=0;passes<2;passes++)
-   {
-     if (passes==0)
-      {
-	bytes_per_channel = pixels_per_line;
-	dest_y = planar_y;
-	nblocks = image_x/4;
-      }
-     else
-      {
-	/* Format planar: All Y, then all U, then all V */
-	bytes_per_channel = pixels_per_line/2;
-	dest_u = planar_u;
-	dest_v = planar_v;
-	dest_y = dest_u;
-	nblocks = image_x/8;
-      }
-
-     offset_to_plane_u = bytes_per_channel*2;
-     offset_to_plane_v = bytes_per_channel*3;
-     /*
-     printf("bytes_per_channel = %d\n",bytes_per_channel);
-     printf("offset_to_plane_u = %d\n",offset_to_plane_u);
-     printf("offset_to_plane_v = %d\n",offset_to_plane_v);
-     */
-
-     while (nblocks-->0)
-      {
-	unsigned int gray_index;
-
-	fill_nbits(reservoir,nbits_in_reservoir,stream,16);
-	gray_index = reservoir & pdev->zzmask;
-	reservoir >>= pdev->zz;
-	nbits_in_reservoir -= pdev->zz;
-
-	fill_nbits(reservoir,nbits_in_reservoir,stream,2);
-
-	if ( (reservoir & 3) == 0)
-	 {
-	   reservoir>>=2;
-	   nbits_in_reservoir-=2;
-	   for (i=0;i<16;i++)
-	     temp_colors[i] = pdev->table_dc00[gray_index];
-
-	 }
-	else
-	 {
-	   unsigned int channel_v, offset1;
-
-	   /* swap bit 0 and 2 of offset_OR */
-	   channel_v = ((reservoir & 1) << 2) | (reservoir & 2) | ((reservoir & 4)>>2);
-	   reservoir>>=3;
-	   nbits_in_reservoir-=3;
-
-	   for (i=0;i<16;i++)
-	     temp_colors[i] = pdev->table_d800[gray_index];
-
-	   ptable0004 = pdev->table_0004 + (passes*16384) + (first_4_bits*1024) + (channel_v*128);
-	   ptable8004 = pdev->table_8004 + (passes*4096)  + (first_4_bits*256)  + (channel_v*32);
-
-	   offset1 = 0;
-	   while(1) 
-	    {
-	      unsigned int index_in_table_ops, op, rows=0;
-	      fill_nbits(reservoir,nbits_in_reservoir,stream,16);
-
-	      /* mode is 0,1 or 2 */
-	      index_in_table_ops = (reservoir&0x3F);
-	      op = table_ops[ index_in_table_ops*4 ];
-	      if (op == 2)
-	       {
-		 reservoir >>= 2;
-		 nbits_in_reservoir -= 2;
-		 break;	/* exit the while(1) */
-	       }
-	      if (op == 0)
-	       {
-		 unsigned int shift;
-
-		 offset1 = (offset1 + table_ops[index_in_table_ops*4+2]) & 0x0F;
-		 shift = table_ops[ index_in_table_ops*4+1 ];
-		 reservoir >>= shift;
-		 nbits_in_reservoir -= shift;
-		 rows = ptable0004[ offset1 + table_ops[index_in_table_ops*4+3] ];
-	       }
-	      if (op == 1)
-	       {
-		  /* 10bits [ xxxx xxxx yyyy 000 ]
-		   * yyy => offset in the table8004
-		   * xxx => offset in the tabled004
-		   */
-		 unsigned int mask, shift;
-		 unsigned int col1, row1, total_bits;
-
-		 offset1 = (offset1 + ((reservoir>>3)&0x0F)+1) & 0x0F;
-
-		 col1 = (reservoir>>7) & 0xFF;
-		 row1 = ptable8004 [ offset1*2 ];
-
-		 /* Bit mask table */
-		 mask = pdev->table_d004[ (row1<<8) + col1 ];
-		 shift = ptable8004 [ offset1*2 + 1];
-		 rows = ((mask << shift) + 0x80) & 0xFF;
-
-		 total_bits = row1 + 8;
-		 reservoir >>= total_bits;
-		 nbits_in_reservoir -= total_bits;
-	       }
-	       {
-		 const unsigned int *table_a004 = pdev->table_a004 + rows*12;
-		 unsigned int *poffset = MulIdx + offset1*16;	/* 64/4 (int) */
-		 for (i=0;i<16;i++)
-		  {
-		    temp_colors[i] += table_a004[ *poffset ];
-		    poffset++;
-		  }
-	       }
-	   }
-	 }
-#define USE_SIGNED_INT_FOR_COLOR
-#ifdef USE_SIGNED_INT_FOR_COLOR
-#  define CLAMP(x) ((x)>255?255:((x)<0?0:x))
-#else
-#  define CLAMP(x) ((x)>255?255:x)
-#endif
-
-	if (passes == 0)
-	 {
-#ifdef USE_SIGNED_INT_FOR_COLOR
-	   const int *c = temp_colors;
-#else
-	   const unsigned int *c = temp_colors;
-#endif
-	   unsigned char *d;
-
-	   d = dest_y;
-	   for (i=0;i<4;i++,c++)
-	     *d++ = CLAMP((*c) >> pdev->yy);
-
-	   d = dest_y + bytes_per_channel;
-	   for (i=0;i<4;i++,c++)
-	     *d++ = CLAMP((*c) >> pdev->yy);
-
-	   d = dest_y + offset_to_plane_u;
-	   for (i=0;i<4;i++,c++)
-	     *d++ = CLAMP((*c) >> pdev->yy);
-
-	   d = dest_y + offset_to_plane_v;
-	   for (i=0;i<4;i++,c++)
-	     *d++ = CLAMP((*c) >> pdev->yy);
-
-	   dest_y += 4;
-	 }
-	else if (passes == 1)
-	 {
-#ifdef USE_SIGNED_INT_FOR_COLOR
-	   int *c1 = temp_colors;
-	   int *c2 = temp_colors+4;
-#else
-	   unsigned int *c1 = temp_colors;
-	   unsigned int *c2 = temp_colors+4;
-#endif
-	   unsigned char *d;
-
-	   d = dest_y;
-	   for (i=0;i<4;i++,c1++,c2++)
-	    {
-	      *d++ = CLAMP((*c1) >> pdev->yy);
-	      *d++ = CLAMP((*c2) >> pdev->yy);
-	    }
-	   c1 = temp_colors+12;
-	   //c2 = temp_colors+8;
-	   d = dest_y + bytes_per_channel;
-	   for (i=0;i<4;i++,c1++,c2++)
-	    {
-	      *d++ = CLAMP((*c1) >> pdev->yy);
-	      *d++ = CLAMP((*c2) >> pdev->yy);
-	    }
-
-	   if (even_line)	/* Each line, swap u/v */
-	    {
-	      even_line=0;
-	      dest_y = dest_v;
-	      dest_u += 8;
-	    }
-	   else
-	    {
-	      even_line=1;
-	      dest_y = dest_u;
-	      dest_v += 8;
-	    }
-	 }
-
-      } /* end of while (nblocks-->0) */
-
-   } /* end of for (passes=0;passes<2;passes++) */
-
-}
-
-
-/**
- *
- * image: size of the image wanted
- * view : size of the image returned by the camera
- * offset: (x,y) to displayer image in the view
- *
- * src: raw data
- * dst: image output
- * flags: PWCX_FLAG_PLANAR
- * pdev: private buffer
- * bandlength:
- *
- */
-void pwc_dec23_decompress(const struct pwc_coord *image,
-                            const struct pwc_coord *view,
-			    const struct pwc_coord *offset,
-			    const void *src,
-			    void *dst,
-			    int flags,
-			    const void *data,
-			    int bandlength)
-{
-  const struct pwc_dec23_private *pdev = data;
-  unsigned char *pout, *pout_planar_y=NULL, *pout_planar_u=NULL, *pout_planar_v=NULL;
-  int i,n,stride,pixel_size;
-
-
-  if (flags & PWCX_FLAG_BAYER)
-   {
-     pout = dst + (view->x * offset->y) + offset->x;
-     pixel_size = view->x * 4;
-   }
-  else
-   {
-     n = view->x * view->y;
-
-     /* offset in Y plane */
-     stride = view->x * offset->y;
-     pout_planar_y = dst + stride + offset->x;
-
-     /* offsets in U/V planes */
-     stride = (view->x * offset->y)/4 + offset->x/2;
-     pout_planar_u = dst + n +     + stride;
-     pout_planar_v = dst + n + n/4 + stride;
-
-     pixel_size = view->x * 4;
-   }
-
-
-  for (i=0;i<image->y;i+=4)
-   {
-     if (flags & PWCX_FLAG_BAYER)
-      {
-	//TODO:
-	//DecompressBandBayer(pdev,src,pout,image.x,view->x,flags);
-	src += bandlength;
-	pout += pixel_size;
-      }
-     else
-      {
-	DecompressBand23(pdev,src,pout_planar_y,pout_planar_u,pout_planar_v,image->x,view->x,flags);
-	src += bandlength;
-	pout_planar_y += pixel_size;
-	pout_planar_u += view->x;
-	pout_planar_v += view->x;
-      }
-   }
-}
-
-void pwc_dec23_exit(void)
-{
-  /* Do nothing */
-
-}
-