-#define BLACK_Y 0
-#define BLACK_U 128
-#define BLACK_V 128
-
-static void pwc_set_image_buffer_size(struct pwc_device *pdev)
-{
- int i, factor = 0;
-
- /* for PALETTE_YUV420P */
- switch(pdev->vpalette)
- {
- case VIDEO_PALETTE_YUV420P:
- factor = 6;
- break;
- case VIDEO_PALETTE_RAW:
- factor = 6; /* can be uncompressed YUV420P */
- break;
- }
-
- /* Set sizes in bytes */
- pdev->image.size = pdev->image.x * pdev->image.y * factor / 4;
- pdev->view.size = pdev->view.x * pdev->view.y * factor / 4;
-
- /* Align offset, or you'll get some very weird results in
- YUV420 mode... x must be multiple of 4 (to get the Y's in
- place), and y even (or you'll mixup U & V). This is less of a
- problem for YUV420P.
- */
- pdev->offset.x = ((pdev->view.x - pdev->image.x) / 2) & 0xFFFC;
- pdev->offset.y = ((pdev->view.y - pdev->image.y) / 2) & 0xFFFE;
-
- /* Fill buffers with black colors */
- for (i = 0; i < pwc_mbufs; i++) {
- unsigned char *p = pdev->image_data + pdev->images[i].offset;
- memset(p, BLACK_Y, pdev->view.x * pdev->view.y);
- p += pdev->view.x * pdev->view.y;
- memset(p, BLACK_U, pdev->view.x * pdev->view.y/4);
- p += pdev->view.x * pdev->view.y/4;
- memset(p, BLACK_V, pdev->view.x * pdev->view.y/4);
- }
-}
-
-