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Subject: [media] gspca - sonixj: Move the avg lum computation to a separate function Author: Jean-François Moine <[email protected]> Date: Thu Feb 10 07:01:30 2011 -0300 Signed-off-by: Jean-François Moine <[email protected]> Signed-off-by: Mauro Carvalho Chehab <[email protected]> drivers/media/video/gspca/sonixj.c | 44 +++++++++++++++++++++-------------- 1 files changed, 26 insertions(+), 18 deletions(-) --- http://git.linuxtv.org/media_tree.git?a=commitdiff;h=6dce16c4d5c1f306d865588b247d25c7f3383d88 diff --git a/drivers/media/video/gspca/sonixj.c b/drivers/media/video/gspca/sonixj.c index d6f39ce..c414707 100644 --- a/drivers/media/video/gspca/sonixj.c +++ b/drivers/media/video/gspca/sonixj.c @@ -2757,6 +2757,29 @@ static void do_autogain(struct gspca_dev *gspca_dev) } } +/* set the average luminosity from an isoc marker */ +static void set_lum(struct sd *sd, + u8 *data) +{ + int avg_lum; + + /* w0 w1 w2 + * w3 w4 w5 + * w6 w7 w8 + */ + avg_lum = (data[27] << 8) + data[28] /* w3 */ + + + (data[31] << 8) + data[32] /* w5 */ + + + (data[23] << 8) + data[24] /* w1 */ + + + (data[35] << 8) + data[36] /* w7 */ + + + (data[29] << 10) + (data[30] << 2); /* w4 * 4 */ + avg_lum >>= 10; + atomic_set(&sd->avg_lum, avg_lum); +} + /* scan the URB packets */ /* This function is run at interrupt level. */ static void sd_pkt_scan(struct gspca_dev *gspca_dev, @@ -2764,7 +2787,7 @@ static void sd_pkt_scan(struct gspca_dev *gspca_dev, int len) /* iso packet length */ { struct sd *sd = (struct sd *) gspca_dev; - int sof, avg_lum; + int sof; /* the image ends on a 64 bytes block starting with * ff d9 ff ff 00 c4 c4 96 @@ -2795,23 +2818,8 @@ static void sd_pkt_scan(struct gspca_dev *gspca_dev, /* end of image found - remove the trailing data */ gspca_dev->image_len = sof + 2; gspca_frame_add(gspca_dev, LAST_PACKET, NULL, 0); - if (sd->ag_cnt < 0) - return; -/* w1 w2 w3 */ -/* w4 w5 w6 */ -/* w7 w8 */ -/* w4 */ - avg_lum = ((data[sof + 29] << 8) | data[sof + 30]) >> 6; -/* w6 */ - avg_lum += ((data[sof + 33] << 8) | data[sof + 34]) >> 6; -/* w2 */ - avg_lum += ((data[sof + 25] << 8) | data[sof + 26]) >> 6; -/* w8 */ - avg_lum += ((data[sof + 37] << 8) | data[sof + 38]) >> 6; -/* w5 */ - avg_lum += ((data[sof + 31] << 8) | data[sof + 32]) >> 4; - avg_lum >>= 4; - atomic_set(&sd->avg_lum, avg_lum); + if (sd->ag_cnt >= 0) + set_lum(sd, data + sof + 2); } static int sd_set_jcomp(struct gspca_dev *gspca_dev, _______________________________________________ linuxtv-commits mailing list [email protected] http://www.linuxtv.org/cgi-bin/mailman/listinfo/linuxtv-commits
