Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 147 insertions, 0 deletions

diff --git a/drivers/usb/media/pwc/pwc-uncompress.c b/drivers/usb/media/pwc/pwc-uncompress.c
new file mode 100644
index 00000000000..c062e43b3ac
--- /dev/null
+++ b/drivers/usb/media/pwc/pwc-uncompress.c
@@ -0,0 +1,147 @@
+/* Linux driver for Philips webcam
+   Decompression frontend.
+   (C) 1999-2003 Nemosoft Unv.
+   (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 <asm/current.h>
+#include <asm/types.h>
+
+#include "pwc.h"
+#include "pwc-uncompress.h"
+#include "pwc-dec1.h"
+#include "pwc-dec23.h"
+
+int pwc_decompress(struct pwc_device *pdev)
+{
+	struct pwc_frame_buf *fbuf;
+	int n, line, col, stride;
+	void *yuv, *image;
+	u16 *src;
+	u16 *dsty, *dstu, *dstv;
+
+	if (pdev == NULL)
+		return -EFAULT;
+#if defined(__KERNEL__) && defined(PWC_MAGIC)
+	if (pdev->magic != PWC_MAGIC) {
+		Err("pwc_decompress(): magic failed.\n");
+		return -EFAULT;
+	}
+#endif
+
+	fbuf = pdev->read_frame;
+	if (fbuf == NULL)
+		return -EFAULT;
+	image = pdev->image_ptr[pdev->fill_image];
+	if (!image)
+		return -EFAULT;
+
+	yuv = fbuf->data + pdev->frame_header_size;  /* Skip header */
+
+	/* Raw format; that's easy... */
+	if (pdev->vpalette == VIDEO_PALETTE_RAW)
+	{
+		memcpy(image, yuv, pdev->frame_size);
+		return 0;
+	}
+
+	if (pdev->vbandlength == 0) {
+		/* Uncompressed mode. We copy the data into the output buffer,
+		   using the viewport size (which may be larger than the image
+		   size). Unfortunately we have to do a bit of byte stuffing
+		   to get the desired output format/size.
+		 */
+			/*
+			 * We do some byte shuffling here to go from the
+			 * native format to YUV420P.
+			 */
+			src = (u16 *)yuv;
+			n = pdev->view.x * pdev->view.y;
+
+			/* offset in Y plane */
+			stride = pdev->view.x * pdev->offset.y + pdev->offset.x;
+			dsty = (u16 *)(image + stride);
+
+			/* offsets in U/V planes */
+			stride = pdev->view.x * pdev->offset.y / 4 + pdev->offset.x / 2;
+			dstu = (u16 *)(image + n +         stride);
+			dstv = (u16 *)(image + n + n / 4 + stride);
+
+			/* increment after each line */
+			stride = (pdev->view.x - pdev->image.x) / 2; /* u16 is 2 bytes */
+
+			for (line = 0; line < pdev->image.y; line++) {
+				for (col = 0; col < pdev->image.x; col += 4) {
+					*dsty++ = *src++;
+					*dsty++ = *src++;
+					if (line & 1)
+						*dstv++ = *src++;
+					else
+						*dstu++ = *src++;
+				}
+				dsty += stride;
+				if (line & 1)
+					dstv += (stride >> 1);
+				else
+					dstu += (stride >> 1);
+			}
+	}
+	else {
+		/* Compressed; the decompressor routines will write the data
+		   in planar format immediately.
+		 */
+		int flags;
+                
+                flags = PWCX_FLAG_PLANAR;
+                if (pdev->vsize == PSZ_VGA && pdev->vframes == 5 && pdev->vsnapshot)
+		 {
+		   printk(KERN_ERR "pwc: Mode Bayer is not supported for now\n");
+		   flags |= PWCX_FLAG_BAYER;
+		   return -ENXIO; /* No such device or address: missing decompressor */
+		 }
+
+		switch (pdev->type)
+		 {
+		  case 675:
+		  case 680:
+		  case 690:
+		  case 720:
+		  case 730:
+		  case 740:
+		  case 750:
+		    pwc_dec23_decompress(&pdev->image, &pdev->view, &pdev->offset,
+				yuv, image,
+				flags,
+				pdev->decompress_data, pdev->vbandlength);
+		    break;
+		  case 645:
+		  case 646:
+		    /* TODO & FIXME */
+		    return -ENXIO; /* No such device or address: missing decompressor */
+		    break;
+		 }
+	}
+	return 0;
+}
+
+