PWC_TRACE
PWC_TRACE("frame_size=%d, vframes=%d, vsize=%d, vbandlength=%d\n",
PWC_TRACE("decode_size = %d.\n", size);
PWC_TRACE("Snapshot button pressed.\n");
PWC_TRACE("Snapshot button released.\n");
PWC_TRACE("Hyundai CMOS sensor bug. Dropping frame.\n");
PWC_TRACE("Image is mirrored.\n");
PWC_TRACE("Image is normal.\n");