JPEG_QT0_OFFSET
jpeg_hdr[JPEG_QT0_OFFSET + i] =
(jpeg_head[JPEG_QT0_OFFSET + i] * sc + 50) / 100;
reg_w(gspca_dev, 0x1100, &sd->jpeg_hdr[JPEG_QT0_OFFSET], 64);
reg_w(gspca_dev, 0x1100, &sd->jpeg_hdr[JPEG_QT0_OFFSET], 64);
memcpy(gspca_dev->usb_buf, &sd->jpeg_hdr[JPEG_QT0_OFFSET], 64);
memcpy(&sd->jpeg_hdr[JPEG_QT0_OFFSET - 1],
jpeg_hdr[JPEG_QT0_OFFSET + i] =
(jpeg_head[JPEG_QT0_OFFSET + i] * sc + 50) / 100;
#define Y_QUANTABLE (&sd->jpeg_hdr[JPEG_QT0_OFFSET])