redonkable/alistair23-linux
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V4L/DVB (4565): Fix scaling calculus

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Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
This commit is contained in:
Mauro Carvalho Chehab 2006-08-30 19:52:14 -03:00
parent 4fcd7d8f7b
commit 66440ccbf2
1 changed files with 4 additions and 12 deletions
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16
drivers/media/video/saa7115.c
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@ -1053,7 +1053,7 @@ static int saa711x_set_size(struct i2c_client *client, int width, int height)
int VSCY;
int res;
int is_50hz = state->std & V4L2_STD_625_50;
int Vsrc = is_50hz ? 576 : 480;
int Vsrc = is_50hz ? 576 : 480+16;
v4l_dbg(1, debug, client, "decoder set size to %ix%i\n",width,height);
@ -1082,22 +1082,14 @@ static int saa711x_set_size(struct i2c_client *client, int width, int height)
saa711x_write(client, R_CD_B_HORIZ_OUTPUT_WINDOW_LENGTH_MSB,
(u8) ((width >> 8) & 0xff));
if (height == Vsrc) {
/*FIXME: This code seems weird, however, this is how it is
working right now.
*/
res=height/2;
if (!is_50hz)
res+=8;
} else
res=height;
/* Vertical Scaling uses height/2 */
res=height/2;
/* height */
saa711x_write(client, R_CE_B_VERT_OUTPUT_WINDOW_LENGTH,
(u8) (res & 0xff));
saa711x_write(client, R_CF_B_VERT_OUTPUT_WINDOW_LENGTH_MSB,
(u8) (res & 0xff));
(u8) ((res >> 8) & 0xff));
/* Scaling settings */
/* Hprescaler is floor(inres/outres) */