1 files changed, 140 insertions, 0 deletions

diff --git a/drivers/media/video/pwc/pwc-misc.c b/drivers/media/video/pwc/pwc-misc.c
new file mode 100644
index 000000000000..b7a4bd3524c7
--- /dev/null
+++ b/drivers/media/video/pwc/pwc-misc.c
@@ -0,0 +1,140 @@
+/* Linux driver for Philips webcam 
+   Various miscellaneous functions and tables.
+   (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 <linux/slab.h>
+
+#include "pwc.h"
+
+struct pwc_coord pwc_image_sizes[PSZ_MAX] =
+{
+        { 128,  96, 0 },
+        { 160, 120, 0 },
+        { 176, 144, 0 },
+        { 320, 240, 0 },
+        { 352, 288, 0 },
+        { 640, 480, 0 },
+};
+
+/* x,y -> PSZ_ */
+int pwc_decode_size(struct pwc_device *pdev, int width, int height)
+{
+        int i, find;
+
+        /* Make sure we don't go beyond our max size.
+           NB: we have different limits for RAW and normal modes. In case
+           you don't have the decompressor loaded or use RAW mode, 
+           the maximum viewable size is smaller.
+        */
+        if (pdev->vpalette == VIDEO_PALETTE_RAW)
+        {
+                if (width > pdev->abs_max.x || height > pdev->abs_max.y)
+                {
+                        Debug("VIDEO_PALETTE_RAW: going beyond abs_max.\n");
+                        return -1;
+                }
+        }
+        else
+        {
+                if (width > pdev->view_max.x || height > pdev->view_max.y)
+                {
+                        Debug("VIDEO_PALETTE_ not RAW: going beyond view_max.\n");
+                        return -1;
+                }
+        }
+
+        /* Find the largest size supported by the camera that fits into the
+           requested size.
+         */
+        find = -1;
+        for (i = 0; i < PSZ_MAX; i++) {
+                if (pdev->image_mask & (1 << i)) {
+                        if (pwc_image_sizes[i].x <= width && pwc_image_sizes[i].y <= height)
+                                find = i;
+                }
+        }
+        return find;
+}
+
+/* initialize variables depending on type and decompressor*/
+void pwc_construct(struct pwc_device *pdev)
+{
+        switch(pdev->type) {
+        case 645:
+        case 646:
+                pdev->view_min.x = 128;
+                pdev->view_min.y =  96;
+                pdev->view_max.x = 352;
+                pdev->view_max.y = 288;
+                pdev->abs_max.x  = 352;
+                pdev->abs_max.y  = 288;
+                pdev->image_mask = 1 << PSZ_SQCIF | 1 << PSZ_QCIF | 1 << PSZ_CIF;
+                pdev->vcinterface = 2;
+                pdev->vendpoint = 4;
+                pdev->frame_header_size = 0;
+                pdev->frame_trailer_size = 0;
+                break;
+        case 675:
+        case 680:
+        case 690:
+                pdev->view_min.x = 128;
+                pdev->view_min.y =  96;
+                /* Anthill bug #38: PWC always reports max size, even without PWCX */
+                pdev->view_max.x = 640;
+                pdev->view_max.y = 480;
+                pdev->image_mask = 1 << PSZ_SQCIF | 1 << PSZ_QSIF | 1 << PSZ_QCIF | 1 << PSZ_SIF | 1 << PSZ_CIF | 1 << PSZ_VGA;
+                pdev->abs_max.x = 640;
+                pdev->abs_max.y = 480;
+                pdev->vcinterface = 3;
+                pdev->vendpoint = 4;
+                pdev->frame_header_size = 0;
+                pdev->frame_trailer_size = 0;
+                break;
+        case 720:
+        case 730:
+        case 740:
+        case 750:
+                pdev->view_min.x = 160;
+                pdev->view_min.y = 120;
+                pdev->view_max.x = 640;
+                pdev->view_max.y = 480;
+                pdev->image_mask = 1 << PSZ_QSIF | 1 << PSZ_SIF | 1 << PSZ_VGA;
+                pdev->abs_max.x = 640;
+                pdev->abs_max.y = 480;
+                pdev->vcinterface = 3;
+                pdev->vendpoint = 5;
+                pdev->frame_header_size = TOUCAM_HEADER_SIZE;
+                pdev->frame_trailer_size = TOUCAM_TRAILER_SIZE;
+                break;
+        }
+        Debug("type = %d\n",pdev->type);
+        pdev->vpalette = VIDEO_PALETTE_YUV420P; /* default */
+        pdev->view_min.size = pdev->view_min.x * pdev->view_min.y;
+        pdev->view_max.size = pdev->view_max.x * pdev->view_max.y;
+        /* length of image, in YUV format; always allocate enough memory. */
+        pdev->len_per_image = (pdev->abs_max.x * pdev->abs_max.y * 3) / 2;
+}
+
+