diff options
Diffstat (limited to 'drivers/media/video/gspca/sonixb.c')
| -rw-r--r-- | drivers/media/video/gspca/sonixb.c | 26 |
1 files changed, 19 insertions, 7 deletions
diff --git a/drivers/media/video/gspca/sonixb.c b/drivers/media/video/gspca/sonixb.c index 80879bf3188..a512772664a 100644 --- a/drivers/media/video/gspca/sonixb.c +++ b/drivers/media/video/gspca/sonixb.c @@ -1033,6 +1033,15 @@ static void sd_pkt_scan(struct gspca_dev *gspca_dev, int i; struct sd *sd = (struct sd *) gspca_dev; + /* frames start with: + * ff ff 00 c4 c4 96 synchro + * 00 (unknown) + * xx (frame sequence / size / compression) + * (xx) (idem - extra byte for sn9c103) + * ll mm brightness sum inside auto exposure + * ll mm brightness sum outside auto exposure + * (xx xx xx xx xx) audio values for snc103 + */ if (len > 6 && len < 24) { for (i = 0; i < len - 6; i++) { if (data[0 + i] == 0xff @@ -1043,15 +1052,18 @@ static void sd_pkt_scan(struct gspca_dev *gspca_dev, && data[5 + i] == 0x96) { /* start of frame */ frame = gspca_frame_add(gspca_dev, LAST_PACKET, frame, data, 0); - if (i < (len - 10)) { - atomic_set(&sd->avg_lum, data[i + 8] + + if (len - i < sd->fr_h_sz) { + atomic_set(&sd->avg_lum, -1); + PDEBUG(D_STREAM, "packet too short to" + " get avg brightness"); + } else if (sd->fr_h_sz == 12) { + atomic_set(&sd->avg_lum, + data[i + 8] + (data[i + 9] << 8)); } else { - atomic_set(&sd->avg_lum, -1); -#ifdef CONFIG_VIDEO_ADV_DEBUG - PDEBUG(D_STREAM, "packet too short to " - "get avg brightness"); -#endif + atomic_set(&sd->avg_lum, + data[i + 9] + + (data[i + 10] << 8)); } data += i + sd->fr_h_sz; len -= i + sd->fr_h_sz; |