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-rw-r--r--drivers/media/usb/pwc/pwc-misc.c81
1 files changed, 81 insertions, 0 deletions
diff --git a/drivers/media/usb/pwc/pwc-misc.c b/drivers/media/usb/pwc/pwc-misc.c
new file mode 100644
index 000000000..e77fd5bd5
--- /dev/null
+++ b/drivers/media/usb/pwc/pwc-misc.c
@@ -0,0 +1,81 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/* Linux driver for Philips webcam
+ Various miscellaneous functions and tables.
+ (C) 1999-2003 Nemosoft Unv.
+ (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.
+ 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.
+
+*/
+
+
+#include "pwc.h"
+
+const int pwc_image_sizes[PSZ_MAX][2] =
+{
+ { 128, 96 }, /* sqcif */
+ { 160, 120 }, /* qsif */
+ { 176, 144 }, /* qcif */
+ { 320, 240 }, /* sif */
+ { 352, 288 }, /* cif */
+ { 640, 480 }, /* vga */
+};
+
+/* x,y -> PSZ_ */
+int pwc_get_size(struct pwc_device *pdev, int width, int height)
+{
+ int i;
+
+ /* Find the largest size supported by the camera that fits into the
+ requested size. */
+ for (i = PSZ_MAX - 1; i >= 0; i--) {
+ if (!(pdev->image_mask & (1 << i)))
+ continue;
+
+ if (pwc_image_sizes[i][0] <= width &&
+ pwc_image_sizes[i][1] <= height)
+ return i;
+ }
+
+ /* No mode found, return the smallest mode we have */
+ for (i = 0; i < PSZ_MAX; i++) {
+ if (pdev->image_mask & (1 << i))
+ return i;
+ }
+
+ /* Never reached there always is at least one supported mode */
+ return 0;
+}
+
+/* initialize variables depending on type and decompressor */
+void pwc_construct(struct pwc_device *pdev)
+{
+ if (DEVICE_USE_CODEC1(pdev->type)) {
+
+ 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;
+
+ } else if (DEVICE_USE_CODEC3(pdev->type)) {
+
+ pdev->image_mask = 1 << PSZ_QSIF | 1 << PSZ_SIF | 1 << PSZ_VGA;
+ pdev->vcinterface = 3;
+ pdev->vendpoint = 5;
+ pdev->frame_header_size = TOUCAM_HEADER_SIZE;
+ pdev->frame_trailer_size = TOUCAM_TRAILER_SIZE;
+
+ } else /* if (DEVICE_USE_CODEC2(pdev->type)) */ {
+
+ pdev->image_mask = 1 << PSZ_SQCIF | 1 << PSZ_QSIF | 1 << PSZ_QCIF | 1 << PSZ_SIF | 1 << PSZ_CIF | 1 << PSZ_VGA;
+ pdev->vcinterface = 3;
+ pdev->vendpoint = 4;
+ pdev->frame_header_size = 0;
+ pdev->frame_trailer_size = 0;
+ }
+}