/* Linux driver for Philips webcam
Decompression frontend.
(C) 1999-2003 Nemosoft Unv.
- (C) 2004-2006 Luc Saillard (luc@saillard.org)
+ (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.
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
-
- vim: set ts=8:
*/
#include <asm/current.h>
#include "pwc.h"
#include "pwc-uncompress.h"
-#include "pwc-dec1.h"
-#include "pwc-dec23.h"
int pwc_decompress(struct pwc_device *pdev)
{
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_data;
- image += pdev->images[pdev->fill_image].offset;
+ 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)
{
- struct pwc_raw_frame *raw_frame = image;
- raw_frame->type = cpu_to_le16(pdev->type);
- raw_frame->vbandlength = cpu_to_le16(pdev->vbandlength);
- /* cmd_buf is always 4 bytes, but sometimes, only the
- * first 3 bytes is filled (Nala case). We can
- * determine this using the type of the webcam */
- memcpy(raw_frame->cmd, pdev->cmd_buf, 4);
- memcpy(raw_frame+1, yuv, pdev->frame_size);
+ 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.
+ /* 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.
*/
- 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++;
+ /*
+ * 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++ = *src++;
+ dstv += (stride >> 1);
else
- *dstu++ = *src++;
+ dstu += (stride >> 1);
}
- dsty += stride;
- if (line & 1)
- dstv += (stride >> 1);
- else
- dstu += (stride >> 1);
- }
-
- return 0;
- }
-
- /*
- * Compressed;
- * the decompressor routines will write the data in planar format
- * immediately.
- */
- if (pdev->vsize == PSZ_VGA && pdev->vframes == 5 && pdev->vsnapshot) {
- PWC_ERROR("Mode Bayer is not supported for now\n");
- /* flags |= PWCX_FLAG_BAYER; */
- return -ENXIO; /* No such device or address: missing decompressor */
}
-
- if (DEVICE_USE_CODEC1(pdev->type)) {
-
- /* TODO & FIXME */
- PWC_ERROR("This chipset is not supported for now\n");
- return -ENXIO; /* No such device or address: missing decompressor */
-
- } else {
- pwc_dec23_decompress(pdev, yuv, image, PWCX_FLAG_PLANAR);
+ 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 */
+ }
+
+#if 0
+ 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; /* Missing decompressor */
+ break;
+ }
+#endif
}
return 0;
}
-/* vim: set cino= formatoptions=croql cindent shiftwidth=8 tabstop=8: */
git://git.onelab.eu / linux-2.6.git / blobdiff