/* Linux driver for Philips webcam
Decompression frontend.
(C) 1999-2003 Nemosoft Unv.
- (C) 2004 Luc Saillard (luc@saillard.org)
+ (C) 2004-2006 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_ptr[pdev->fill_image];
- if (!image)
- return -EFAULT;
+ image = pdev->image_data;
+ image += pdev->images[pdev->fill_image].offset;
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);
+ 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);
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.
+ /* 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.
*/
- /*
- * 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;
+ 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 += (stride >> 1);
+ *dstv++ = *src++;
else
- dstu += (stride >> 1);
+ *dstu++ = *src++;
}
+ dsty += stride;
+ if (line & 1)
+ dstv += (stride >> 1);
+ else
+ dstu += (stride >> 1);
+ }
+
+ return 0;
}
- 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
+
+ /*
+ * 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);
}
return 0;
}
+/* vim: set cino= formatoptions=croql cindent shiftwidth=8 tabstop=8: */
git://git.onelab.eu / linux-2.6.git / blobdiff