V4L/DVB (7567): em28xx: Some cleanups

Removes some fields from data structs.

There are some fields that are just caching some calculus for buffer
size. The calculus were moved to the places it were needed and the now
unused fields were removed.

Signed-off-by: Mauro Carvalho Chehab <[e-mail]>

drivers/media/video/em28xx/em28xx-core.c

···
 {
 	int errCode, prev_alt = dev->alt;
 	int i;
-	unsigned int min_pkt_size = dev->bytesperline + 4;
+	unsigned int min_pkt_size = dev->width * 2 + 4;
 
 	/* When image size is bigger than a certain value,
 	   the frame size should be increased, otherwise, only
 	   green screen will be received.
 	 */
-	if (dev->frame_size > 720*240*2)
+	if (dev->width * 2 * dev->height > 720 * 240 * 2)
 		min_pkt_size *= 2;
 
 	for (i = 0; i < dev->num_alt; i++) {

drivers/media/video/em28xx/em28xx-video.c

···
 {
 	void *fieldstart, *startwrite, *startread;
 	int  linesdone, currlinedone, offset, lencopy, remain;
-
-	if (dev->frame_size != buf->vb.size) {
-		em28xx_errdev("size %i and buf.length %lu are different!\n",
-			      dev->frame_size, buf->vb.size);
-		return;
-	}
+	int bytesperline = dev->width << 1;
 
 	if (dma_q->pos + len > buf->vb.size)
 		len = buf->vb.size - dma_q->pos;
···
 	if (buf->top_field)
 		fieldstart = outp;
 	else
-		fieldstart = outp + dev->bytesperline;
+		fieldstart = outp + bytesperline;
 
-	linesdone = dma_q->pos / dev->bytesperline;
-	currlinedone = dma_q->pos % dev->bytesperline;
-	offset = linesdone * dev->bytesperline * 2 + currlinedone;
+	linesdone = dma_q->pos / bytesperline;
+	currlinedone = dma_q->pos % bytesperline;
+	offset = linesdone * bytesperline * 2 + currlinedone;
 	startwrite = fieldstart + offset;
-	lencopy = dev->bytesperline - currlinedone;
+	lencopy = bytesperline - currlinedone;
 	lencopy = lencopy > remain ? remain : lencopy;
 
 	if ((char *)startwrite + lencopy > (char *)outp + buf->vb.size) {
···
 	remain -= lencopy;
 
 	while (remain > 0) {
-		startwrite += lencopy + dev->bytesperline;
+		startwrite += lencopy + bytesperline;
 		startread += lencopy;
-		if (dev->bytesperline > remain)
+		if (bytesperline > remain)
 			lencopy = remain;
 		else
-			lencopy = dev->bytesperline;
+			lencopy = bytesperline;
 
 		if ((char *)startwrite + lencopy > (char *)outp + buf->vb.size) {
 			em28xx_isocdbg("Overflow of %zi bytes past buffer end (2)\n",
···
 	struct em28xx_dmaqueue *vidq = &dev->vidq;
 	int                  rc = 0, urb_init = 0;
 
-	/* BUG_ON(NULL == fh->fmt); */
-
 	/* FIXME: It assumes depth = 16 */
 	/* The only currently supported format is 16 bits/pixel */
 	buf->vb.size = 16 * dev->width * dev->height >> 3;
···
 	if (0 != buf->vb.baddr  &&  buf->vb.bsize < buf->vb.size)
 		return -EINVAL;
 
-	buf->fmt       = fh->fmt;
 	buf->vb.width  = dev->width;
 	buf->vb.height = dev->height;
 	buf->vb.field  = field;
···
 	f->fmt.pix.width = dev->width;
 	f->fmt.pix.height = dev->height;
 	f->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
-	f->fmt.pix.bytesperline = dev->bytesperline;
-	f->fmt.pix.sizeimage = dev->frame_size;
+	f->fmt.pix.bytesperline = dev->width * 2;
+	f->fmt.pix.sizeimage = f->fmt.pix.bytesperline  * dev->height;
 	f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
 
 	/* FIXME: TOP? NONE? BOTTOM? ALTENATE? */
···
 	/* set new image size */
 	dev->width = f->fmt.pix.width;
 	dev->height = f->fmt.pix.height;
-	dev->frame_size = dev->width * dev->height * 2;
-	dev->field_size = dev->frame_size >> 1;
-	dev->bytesperline = dev->width * 2;
 	get_scale(dev, dev->width, dev->height, &dev->hscale, &dev->vscale);
 
 	em28xx_set_alternate(dev);
···
 	/* set new image size */
 	dev->width = f.fmt.pix.width;
 	dev->height = f.fmt.pix.height;
-	dev->frame_size = dev->width * dev->height * 2;
-	dev->field_size = dev->frame_size >> 1;
-	dev->bytesperline = dev->width * 2;
 	get_scale(dev, dev->width, dev->height, &dev->hscale, &dev->vscale);
 
 	em28xx_resolution_set(dev);
···
 	if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE && dev->users == 0) {
 		dev->width = norm_maxw(dev);
 		dev->height = norm_maxh(dev);
-		dev->frame_size = dev->width * dev->height * 2;
-		dev->field_size = dev->frame_size >> 1;	/*both_fileds ? dev->frame_size>>1 : dev->frame_size; */
-		dev->bytesperline = dev->width * 2;
 		dev->hscale = 0;
 		dev->vscale = 0;
 
···
 	dev->width = maxw;
 	dev->height = maxh;
 	dev->interlaced = EM28XX_INTERLACED_DEFAULT;
-	dev->field_size = dev->width * dev->height;
-	dev->frame_size =
-	    dev->interlaced ? dev->field_size << 1 : dev->field_size;
-	dev->bytesperline = dev->width * 2;
 	dev->hscale = 0;
 	dev->vscale = 0;
 	dev->ctl_input = 2;

drivers/media/video/em28xx/em28xx.h

···
 	/* common v4l buffer stuff -- must be first */
 	struct videobuf_buffer vb;
 
-	struct em28xx_fmt *fmt;
-
 	struct list_head frame;
 	int top_field;
 	int receiving;
···
 	/* frame properties */
 	int width;		/* current frame width */
 	int height;		/* current frame height */
-	int frame_size;		/* current frame size */
-	int field_size;		/* current field size */
-	int bytesperline;
 	int hscale;		/* horizontal scale factor (see datasheet) */
 	int vscale;		/* vertical scale factor (see datasheet) */
 	int interlaced;		/* 1=interlace fileds, 0=just top fileds */
···
 	unsigned int  stream_on:1;	/* Locks streams */
 	int           radio;
 
-	unsigned int                 width, height;
 	struct videobuf_queue        vb_vidq;
-	struct em28xx_fmt            *fmt;
 
 	enum v4l2_buf_type           type;
 };