added S920 format support for some webcams using sn9c20x driver

svn path=/trunk/externals/pidip/; revision=12460

1 files changed, 122 insertions, 2 deletions

diff --git a/modules/pdp_v4l2.c b/modules/pdp_v4l2.c
index b1e908b..449669c 100755
--- a/modules/pdp_v4l2.c
+++ b/modules/pdp_v4l2.c
@@ -63,6 +63,120 @@
 #define MAX_CTRL    32
 
 
+#define DO_SANITY_CHECKS 0
+
+static const int UVTranslate[32] = {0, 1, 2, 3, 
+			8, 9, 10, 11, 
+			16, 17, 18, 19, 
+			24, 25, 26, 27, 
+			4, 5, 6, 7,
+			12, 13, 14, 15,
+			20, 21, 22, 23,
+			28, 29, 30, 31};
+
+static const int Y_coords_624x[128][2] = {
+{ 0,  0}, { 1,  0}, { 2,  0}, { 3,  0}, { 4,  0}, { 5,  0}, { 6,  0}, { 7,  0},
+{ 0,  1}, { 1,  1}, { 2,  1}, { 3,  1}, { 4,  1}, { 5,  1}, { 6,  1}, { 7,  1},
+{ 0,  2}, { 1,  2}, { 2,  2}, { 3,  2}, { 4,  2}, { 5,  2}, { 6,  2}, { 7,  2},
+{ 0,  3}, { 1,  3}, { 2,  3}, { 3,  3}, { 4,  3}, { 5,  3}, { 6,  3}, { 7,  3},
+
+{ 0,  4}, { 1,  4}, { 2,  4}, { 3,  4}, { 4,  4}, { 5,  4}, { 6,  4}, { 7,  4},
+{ 0,  5}, { 1,  5}, { 2,  5}, { 3,  5}, { 4,  5}, { 5,  5}, { 6,  5}, { 7,  5},
+{ 0,  6}, { 1,  6}, { 2,  6}, { 3,  6}, { 4,  6}, { 5,  6}, { 6,  6}, { 7,  6},
+{ 0,  7}, { 1,  7}, { 2,  7}, { 3,  7}, { 4,  7}, { 5,  7}, { 6,  7}, { 7,  7},
+
+{ 8,  0}, { 9,  0}, {10,  0}, {11,  0}, {12,  0}, {13,  0}, {14,  0}, {15,  0},
+{ 8,  1}, { 9,  1}, {10,  1}, {11,  1}, {12,  1}, {13,  1}, {14,  1}, {15,  1},
+{ 8,  2}, { 9,  2}, {10,  2}, {11,  2}, {12,  2}, {13,  2}, {14,  2}, {15,  2},
+{ 8,  3}, { 9,  3}, {10,  3}, {11,  3}, {12,  3}, {13,  3}, {14,  3}, {15,  3},
+
+{ 8,  4}, { 9,  4}, {10,  4}, {11,  4}, {12,  4}, {13,  4}, {14,  4}, {15,  4},
+{ 8,  5}, { 9,  5}, {10,  5}, {11,  5}, {12,  5}, {13,  5}, {14,  5}, {15,  5},
+{ 8,  6}, { 9,  6}, {10,  6}, {11,  6}, {12,  6}, {13,  6}, {14,  6}, {15,  6},
+{ 8,  7}, { 9,  7}, {10,  7}, {11,  7}, {12,  7}, {13,  7}, {14,  7}, {15,  7}
+};
+
+static void do_write_u(const unsigned char *buf, unsigned char *ptr,
+	int i, int j)
+{
+	*ptr = buf[i + 128 + j];
+}
+
+static void do_write_v(const unsigned char *buf, unsigned char *ptr,
+	int i, int j)
+{
+	*ptr = buf[i + 160 + j];
+}
+
+
+void v4lconvert_sn9c20x_to_yuv420(const unsigned char *raw, unsigned char *i420,
+  int width, int height, int yvu)
+{
+	int i = 0, x = 0, y = 0, j, relX, relY, x_div2, y_div2;
+	const unsigned char *buf = raw;
+	unsigned char *ptr;
+	int frame_size = width * height;
+	int frame_size_div2 = frame_size >> 1;
+	int frame_size_div4 = frame_size >> 2;
+	int width_div2 = width >> 1;
+	int height_div2 = height >> 1;
+	void (*do_write_uv1)(const unsigned char *buf, unsigned char *ptr, int i,
+	int j) = NULL;
+	void (*do_write_uv2)(const unsigned char *buf, unsigned char *ptr, int i,
+	int j) = NULL;
+
+	if (yvu) {
+		do_write_uv1 = do_write_v;
+		do_write_uv2 = do_write_u;
+	}
+	else {
+		do_write_uv1 = do_write_u;
+		do_write_uv2 = do_write_v;
+	}
+
+	while (i < (frame_size + frame_size_div2)) {
+		for (j = 0; j < 128; j++) {
+			relX = x + Y_coords_624x[j][0];
+			relY = y + Y_coords_624x[j][1];
+
+#if (DO_SANITY_CHECKS==1)
+			if ((relX < width) && (relY < height)) {
+#endif
+				ptr = i420 + relY * width + relX;
+				*ptr = buf[i + j];
+#if (DO_SANITY_CHECKS==1)
+			}
+#endif
+
+		}
+		x_div2 = x >> 1;
+		y_div2 = y >> 1;
+		for (j = 0; j < 32; j++) {
+			relX = (x_div2) + (j & 0x07);
+			relY = (y_div2) + (j >> 3);
+
+#if (DO_SANITY_CHECKS==1)
+			if ((relX < width_div2) && (relY < height_div2)) {
+#endif
+				ptr = i420 + frame_size +
+					relY * width_div2 + relX;
+				do_write_uv1(buf, ptr, i, j);
+				ptr += frame_size_div4;
+				do_write_uv2(buf, ptr, i, j);
+#if (DO_SANITY_CHECKS==1)
+			}
+#endif
+		}
+
+		i += 192;
+		x += 16;
+		if (x >= width) {
+			x = 0;
+			y += 8;
+		}
+	}
+}
+
 typedef struct pdp_v4l2_struct
 {
   t_object x_obj;
@@ -739,9 +853,15 @@ static void pdp_v4l2_bang(t_pdp_v4l2 *x)
     case  V4L2_PIX_FMT_UYVY: 
         pdp_llconv(newimage, RIF_UYVY_P____U8, data, RIF_YVU__P411_S16, x->x_width, x->x_height);
         break;
-
+    case  v4l2_fourcc('S', '9', '2', '0'):
+	//memcpy(data, newimage, x->x_width * x->x_height *2); 
+	//pdp_llconv(newimage, RIF_YUYV_P____S16, data, RIF_YVU__P411_S16, x->x_width, x->x_height);
+	v4lconvert_sn9c20x_to_yuv420(newimage,data,x->x_width, x->x_height,1);
+	pdp_llconv(data, RIF_YUV__P411_U8, newimage, RIF_YVU__P411_S16, x->x_width, x->x_height);
+	memcpy(data, newimage, x->x_width * x->x_height *2); 
+        break;
     default:
-	post("pdp_v4l2: unsupported color model");
+	post("pdp_v4l2: unsupported color model: %d", x->x_v4l2_format.fmt.pix.pixelformat);
 	break;
     }