diff options
Diffstat (limited to 'drivers/media/video/gspca/pac7311.c')
| -rw-r--r-- | drivers/media/video/gspca/pac7311.c | 33 |
1 files changed, 23 insertions, 10 deletions
diff --git a/drivers/media/video/gspca/pac7311.c b/drivers/media/video/gspca/pac7311.c index 034c00d6c0ab..730b4a1aed9e 100644 --- a/drivers/media/video/gspca/pac7311.c +++ b/drivers/media/video/gspca/pac7311.c @@ -702,8 +702,16 @@ static void do_autogain(struct gspca_dev *gspca_dev) static void put_jpeg_head(struct gspca_dev *gspca_dev, struct gspca_frame *frame) { + struct sd *sd = (struct sd *) gspca_dev; unsigned char tmpbuf[4]; + if (sd->ag_cnt >= 0) { + if (--sd->ag_cnt < 0) { + sd->ag_cnt = AG_CNT_START; + atomic_set(&sd->avg_lum, sd->lum_sum / AG_CNT_START); + atomic_set(&sd->do_gain, 1); + } + } gspca_frame_add(gspca_dev, FIRST_PACKET, frame, (__u8 *) pac7311_jpeg_header, 12); @@ -727,7 +735,7 @@ static void sd_pkt_scan(struct gspca_dev *gspca_dev, struct sd *sd = (struct sd *) gspca_dev; int i; -#define INTER_FRAME 0x53 +#define INTER_FRAME 0x53 /* eof + inter frame + sof */ #define LUM_OFFSET 0x1e /* reverse offset / start of frame */ /* @@ -746,11 +754,18 @@ static void sd_pkt_scan(struct gspca_dev *gspca_dev, if (sd->tosof == 0) { /* if inside a frame */ /* check for 'ff ff ff xx' at start and at end of packet */ - /* (len is always >= 3) */ + /* (len is always >= 3 and xx never ff) */ switch (sd->ffnb) { case 1: - if (data[0] != 0xff) + if (data[0] != 0xff) { /* can be '00' only */ + __u8 ff; + + sd->ffnb = 0; + ff = 0xff; + gspca_frame_add(gspca_dev, INTER_PACKET, + frame, &ff, 1); break; /* keep 'ff 00' */ + } /* fall thru */ case 2: case 3: @@ -775,16 +790,13 @@ static void sd_pkt_scan(struct gspca_dev *gspca_dev, } } else { /* outside a frame */ - /* - * get the luminosity - * and go to the start of frame - */ + /* get the luminosity and go to the start of frame */ data += sd->tosof; len -= sd->tosof; if (sd->tosof > LUM_OFFSET) sd->lum_sum += data[-LUM_OFFSET]; - put_jpeg_head(gspca_dev, frame); sd->tosof = 0; + put_jpeg_head(gspca_dev, frame); } for (i = 0; i < len; i++) { @@ -792,10 +804,9 @@ static void sd_pkt_scan(struct gspca_dev *gspca_dev, continue; switch (data[i + 1]) { case 0xd9: /* end of frame */ - i += 2; frame = gspca_frame_add(gspca_dev, LAST_PACKET, - frame, data, i); + frame, data, i + 2); data += i + INTER_FRAME; len -= i + INTER_FRAME; i = 0; @@ -816,6 +827,8 @@ static void sd_pkt_scan(struct gspca_dev *gspca_dev, break; } } + gspca_frame_add(gspca_dev, INTER_PACKET, + frame, data, i); } static int sd_setbrightness(struct gspca_dev *gspca_dev, __s32 val) |